*/
/*
- * Portions copyright (c) 2011, Joyent, Inc. All rights reserved.
+ * Portions Copyright (c) 2013, 2016, Joyent, Inc. All rights reserved.
+ * Portions Copyright (c) 2013 by Delphix. All rights reserved.
*/
/*
* - Enabling functions
* - DOF functions
* - Anonymous enabling functions
+ * - Process functions
* - Consumer state functions
* - Helper functions
* - Hook functions
* [Group] Functions", allowing one to find each block by searching forward
* on capital-f functions.
*/
-#if !defined(__APPLE__)
-#include <sys/errno.h>
-#include <sys/stat.h>
-#include <sys/modctl.h>
-#include <sys/conf.h>
-#include <sys/systm.h>
-#include <sys/ddi.h>
-#include <sys/sunddi.h>
-#include <sys/cpuvar.h>
-#include <sys/kmem.h>
-#include <sys/strsubr.h>
-#include <sys/sysmacros.h>
-#include <sys/dtrace_impl.h>
-#include <sys/atomic.h>
-#include <sys/cmn_err.h>
-#include <sys/mutex_impl.h>
-#include <sys/rwlock_impl.h>
-#include <sys/ctf_api.h>
-#include <sys/panic.h>
-#include <sys/priv_impl.h>
-#include <sys/policy.h>
-#include <sys/cred_impl.h>
-#include <sys/procfs_isa.h>
-#include <sys/taskq.h>
-#include <sys/mkdev.h>
-#include <sys/kdi.h>
-#include <sys/zone.h>
-#else
#include <sys/errno.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <mach/task.h>
#include <kern/zalloc.h>
#include <kern/ast.h>
+#include <kern/sched_prim.h>
+#include <kern/task.h>
#include <netinet/in.h>
+#include <libkern/sysctl.h>
+#include <sys/kdebug.h>
-#if defined(__APPLE__)
#include <kern/cpu_data.h>
extern uint32_t pmap_find_phys(void *, uint64_t);
extern boolean_t pmap_valid_page(uint32_t);
extern void OSKextRegisterKextsWithDTrace(void);
extern kmod_info_t g_kernel_kmod_info;
-#endif /* __APPLE__ */
-
/* Solaris proc_t is the struct. Darwin's proc_t is a pointer to it. */
#define proc_t struct proc /* Steer clear of the Darwin typedef for proc_t */
extern void dtrace_init(void);
extern void helper_init(void);
extern void fasttrap_init(void);
-extern void dtrace_lazy_dofs_duplicate(proc_t *, proc_t *);
+
+static int dtrace_lazy_dofs_duplicate(proc_t *, proc_t *);
extern void dtrace_lazy_dofs_destroy(proc_t *);
extern void dtrace_postinit(void);
-#include "../../../osfmk/chud/chud_dtrace.h"
-
-extern kern_return_t chudxnu_dtrace_callback
- (uint64_t selector, uint64_t *args, uint32_t count);
-
-#endif /* __APPLE__ */
-
+extern void dtrace_proc_fork(proc_t*, proc_t*, int);
+extern void dtrace_proc_exec(proc_t*);
+extern void dtrace_proc_exit(proc_t*);
/*
* DTrace Tunable Variables
*
- * The following variables may be tuned by adding a line to /etc/system that
- * includes both the name of the DTrace module ("dtrace") and the name of the
- * variable. For example:
- *
- * set dtrace:dtrace_destructive_disallow = 1
+ * The following variables may be dynamically tuned by using sysctl(8), the
+ * variables being stored in the kern.dtrace namespace. For example:
+ * sysctl kern.dtrace.dof_maxsize = 1048575 # 1M
*
* In general, the only variables that one should be tuning this way are those
* that affect system-wide DTrace behavior, and for which the default behavior
* When tuning these variables, avoid pathological values; while some attempt
* is made to verify the integrity of these variables, they are not considered
* part of the supported interface to DTrace, and they are therefore not
- * checked comprehensively. Further, these variables should not be tuned
- * dynamically via "mdb -kw" or other means; they should only be tuned via
- * /etc/system.
+ * checked comprehensively.
*/
+uint64_t dtrace_buffer_memory_maxsize = 0; /* initialized in dtrace_init */
+uint64_t dtrace_buffer_memory_inuse = 0;
int dtrace_destructive_disallow = 0;
dtrace_optval_t dtrace_nonroot_maxsize = (16 * 1024 * 1024);
size_t dtrace_difo_maxsize = (256 * 1024);
dtrace_optval_t dtrace_dof_maxsize = (384 * 1024);
-size_t dtrace_global_maxsize = (16 * 1024);
+dtrace_optval_t dtrace_statvar_maxsize = (16 * 1024);
+dtrace_optval_t dtrace_statvar_maxsize_max = (16 * 10 * 1024);
size_t dtrace_actions_max = (16 * 1024);
size_t dtrace_retain_max = 1024;
dtrace_optval_t dtrace_helper_actions_max = 32;
dtrace_optval_t dtrace_helper_providers_max = 64;
dtrace_optval_t dtrace_dstate_defsize = (1 * 1024 * 1024);
size_t dtrace_strsize_default = 256;
+dtrace_optval_t dtrace_strsize_min = 8;
+dtrace_optval_t dtrace_strsize_max = 65536;
dtrace_optval_t dtrace_cleanrate_default = 990099000; /* 1.1 hz */
dtrace_optval_t dtrace_cleanrate_min = 20000000; /* 50 hz */
dtrace_optval_t dtrace_cleanrate_max = (uint64_t)60 * NANOSEC; /* 1/minute */
dtrace_optval_t dtrace_ustackframes_default = 20;
dtrace_optval_t dtrace_jstackframes_default = 50;
dtrace_optval_t dtrace_jstackstrsize_default = 512;
+dtrace_optval_t dtrace_buflimit_default = 75;
+dtrace_optval_t dtrace_buflimit_min = 1;
+dtrace_optval_t dtrace_buflimit_max = 99;
int dtrace_msgdsize_max = 128;
hrtime_t dtrace_chill_max = 500 * (NANOSEC / MILLISEC); /* 500 ms */
hrtime_t dtrace_chill_interval = NANOSEC; /* 1000 ms */
int dtrace_devdepth_max = 32;
int dtrace_err_verbose;
+int dtrace_provide_private_probes = 0;
hrtime_t dtrace_deadman_interval = NANOSEC;
hrtime_t dtrace_deadman_timeout = (hrtime_t)10 * NANOSEC;
hrtime_t dtrace_deadman_user = (hrtime_t)30 * NANOSEC;
*/
static dev_info_t *dtrace_devi; /* device info */
static vmem_t *dtrace_arena; /* probe ID arena */
-static vmem_t *dtrace_minor; /* minor number arena */
static taskq_t *dtrace_taskq; /* task queue */
static dtrace_probe_t **dtrace_probes; /* array of all probes */
static int dtrace_nprobes; /* number of probes */
static dtrace_meta_t *dtrace_meta_pid; /* user-land meta provider */
static int dtrace_opens; /* number of opens */
static int dtrace_helpers; /* number of helpers */
-static void *dtrace_softstate; /* softstate pointer */
static dtrace_hash_t *dtrace_bymod; /* probes hashed by module */
static dtrace_hash_t *dtrace_byfunc; /* probes hashed by function */
static dtrace_hash_t *dtrace_byname; /* probes hashed by name */
static dtrace_enabling_t *dtrace_retained; /* list of retained enablings */
static dtrace_genid_t dtrace_retained_gen; /* current retained enab gen */
static dtrace_dynvar_t dtrace_dynhash_sink; /* end of dynamic hash chains */
-#if defined(__APPLE__)
+
static int dtrace_dof_mode; /* See dtrace_impl.h for a description of Darwin's dof modes. */
/*
* fbt_provide and sdt_provide. Its clearly not a dtrace tunable variable either...
*/
int dtrace_kernel_symbol_mode; /* See dtrace_impl.h for a description of Darwin's kernel symbol modes. */
-#endif
+static uint32_t dtrace_wake_clients;
+
-#if defined(__APPLE__)
/*
* To save memory, some common memory allocations are given a
* unique zone. For example, dtrace_probe_t is 72 bytes in size,
struct zone *dtrace_probe_t_zone;
static int dtrace_module_unloaded(struct kmod_info *kmod);
-#endif /* __APPLE__ */
/*
* DTrace Locking
* acquired _between_ dtrace_provider_lock and dtrace_lock.
*/
-#if !defined(__APPLE__)
-static kmutex_t dtrace_lock; /* probe state lock */
-static kmutex_t dtrace_provider_lock; /* provider state lock */
-static kmutex_t dtrace_meta_lock; /* meta-provider state lock */
-#else
+
/*
* APPLE NOTE:
*
- * All kmutex_t vars have been changed to lck_mtx_t.
- * Note that lck_mtx_t's require explicit initialization.
+ * For porting purposes, all kmutex_t vars have been changed
+ * to lck_mtx_t, which require explicit initialization.
*
+ * kmutex_t becomes lck_mtx_t
* mutex_enter() becomes lck_mtx_lock()
* mutex_exit() becomes lck_mtx_unlock()
*
* becomes:
* lck_mtx_assert(&cpu_lock, LCK_MTX_ASSERT_OWNED);
*
- * Due to the number of these changes, they are not called out explicitly.
*/
static lck_mtx_t dtrace_lock; /* probe state lock */
static lck_mtx_t dtrace_provider_lock; /* provider state lock */
static lck_mtx_t dtrace_meta_lock; /* meta-provider state lock */
static lck_rw_t dtrace_dof_mode_lock; /* dof mode lock */
-#endif /* __APPLE__ */
/*
* DTrace Provider Variables
uint32_t dtrace_helptrace_next = 0;
uint32_t dtrace_helptrace_nlocals;
char *dtrace_helptrace_buffer;
-#if !defined(__APPLE__) /* Quiet compiler warning */
-int dtrace_helptrace_bufsize = 512 * 1024;
-#else
size_t dtrace_helptrace_bufsize = 512 * 1024;
-#endif /* __APPLE__ */
#if DEBUG
int dtrace_helptrace_enabled = 1;
int dtrace_helptrace_enabled = 0;
#endif
+
/*
* DTrace Error Hashing
*
/*
* The key for a thread-local variable consists of the lower 61 bits of the
- * t_did, plus the 3 bits of the highest active interrupt above LOCK_LEVEL.
+ * current_thread(), plus the 3 bits of the highest active interrupt above LOCK_LEVEL.
* We add DIF_VARIABLE_MAX to t_did to assure that the thread key is never
* equal to a variable identifier. This is necessary (but not sufficient) to
* assure that global associative arrays never collide with thread-local
* no way for a global variable key signature to match a thread-local key
* signature.
*/
-#if !defined(__APPLE__)
-#define DTRACE_TLS_THRKEY(where) { \
- uint_t intr = 0; \
- uint_t actv = CPU->cpu_intr_actv >> (LOCK_LEVEL + 1); \
- for (; actv; actv >>= 1) \
- intr++; \
- ASSERT(intr < (1 << 3)); \
- (where) = ((curthread->t_did + DIF_VARIABLE_MAX) & \
- (((uint64_t)1 << 61) - 1)) | ((uint64_t)intr << 61); \
-}
-#else
#if defined (__x86_64__)
/* FIXME: two function calls!! */
#define DTRACE_TLS_THRKEY(where) { \
#else
#error Unknown architecture
#endif
-#endif /* __APPLE__ */
#define DT_BSWAP_8(x) ((x) & 0xff)
#define DT_BSWAP_16(x) ((DT_BSWAP_8(x) << 8) | DT_BSWAP_8((x) >> 8))
return (0); \
}
+#define DTRACE_RANGE_REMAIN(remp, addr, baseaddr, basesz) \
+do { \
+ if ((remp) != NULL) { \
+ *(remp) = (uintptr_t)(baseaddr) + (basesz) - (addr); \
+ } \
+} while (0)
+
+
/*
* Test whether a range of memory starting at testaddr of size testsz falls
* within the range of memory described by addr, sz. We take care to avoid
((mstate)->dtms_scratch_base + (mstate)->dtms_scratch_size - \
(mstate)->dtms_scratch_ptr >= (alloc_sz))
-#if !defined(__APPLE__)
-#define DTRACE_LOADFUNC(bits) \
-/*CSTYLED*/ \
-uint##bits##_t \
-dtrace_load##bits(uintptr_t addr) \
-{ \
- size_t size = bits / NBBY; \
- /*CSTYLED*/ \
- uint##bits##_t rval; \
- int i; \
- volatile uint16_t *flags = (volatile uint16_t *) \
- &cpu_core[CPU->cpu_id].cpuc_dtrace_flags; \
- \
- DTRACE_ALIGNCHECK(addr, size, flags); \
- \
- for (i = 0; i < dtrace_toxranges; i++) { \
- if (addr >= dtrace_toxrange[i].dtt_limit) \
- continue; \
- \
- if (addr + size <= dtrace_toxrange[i].dtt_base) \
- continue; \
- \
- /* \
- * This address falls within a toxic region; return 0. \
- */ \
- *flags |= CPU_DTRACE_BADADDR; \
- cpu_core[CPU->cpu_id].cpuc_dtrace_illval = addr; \
- return (0); \
- } \
- \
- *flags |= CPU_DTRACE_NOFAULT; \
- /*CSTYLED*/ \
- rval = *((volatile uint##bits##_t *)addr); \
- *flags &= ~CPU_DTRACE_NOFAULT; \
- \
- return (!(*flags & CPU_DTRACE_FAULT) ? rval : 0); \
-}
-#else /* __APPLE__ */
#define RECOVER_LABEL(bits) dtraceLoadRecover##bits:
-#if defined (__x86_64__)
+#if defined (__x86_64__) || (defined (__arm__) || defined (__arm64__))
#define DTRACE_LOADFUNC(bits) \
/*CSTYLED*/ \
uint##bits##_t dtrace_load##bits(uintptr_t addr); \
*/ \
if (pmap_valid_page(pmap_find_phys(kernel_pmap, addr))) \
rval = *((volatile uint##bits##_t *)addr); \
+ else { \
+ *flags |= CPU_DTRACE_BADADDR; \
+ cpu_core[CPU->cpu_id].cpuc_dtrace_illval = addr; \
+ return (0); \
+ } \
+ \
RECOVER_LABEL(bits); \
(void)dtrace_set_thread_recover(current_thread(), recover); \
*flags &= ~CPU_DTRACE_NOFAULT; \
#else /* all other architectures */
#error Unknown Architecture
#endif
-#endif /* __APPLE__ */
#ifdef __LP64__
#define dtrace_loadptr dtrace_load64
(act)->dta_difo->dtdo_rtype.dtdt_kind == DIF_TYPE_STRING)
-#if defined (__APPLE__)
-/* Avoid compiler warnings when assigning regs[rd] = NULL */
-#ifdef NULL
-#undef NULL
-#define NULL (uintptr_t)0
-#endif
-#endif /* __APPLE__ */
-
static size_t dtrace_strlen(const char *, size_t);
static dtrace_probe_t *dtrace_probe_lookup_id(dtrace_id_t id);
static void dtrace_enabling_provide(dtrace_provider_t *);
-static int dtrace_enabling_match(dtrace_enabling_t *, int *);
+static int dtrace_enabling_match(dtrace_enabling_t *, int *, dtrace_match_cond_t *cond);
+static void dtrace_enabling_matchall_with_cond(dtrace_match_cond_t *cond);
static void dtrace_enabling_matchall(void);
static dtrace_state_t *dtrace_anon_grab(void);
static uint64_t dtrace_helper(int, dtrace_mstate_t *,
dtrace_state_t *, dtrace_mstate_t *);
static int dtrace_state_option(dtrace_state_t *, dtrace_optid_t,
dtrace_optval_t);
-static int dtrace_ecb_create_enable(dtrace_probe_t *, void *);
+static int dtrace_ecb_create_enable(dtrace_probe_t *, void *, void *);
static void dtrace_helper_provider_destroy(dtrace_helper_provider_t *);
+static int dtrace_canload_remains(uint64_t, size_t, size_t *,
+ dtrace_mstate_t *, dtrace_vstate_t *);
+static int dtrace_canstore_remains(uint64_t, size_t, size_t *,
+ dtrace_mstate_t *, dtrace_vstate_t *);
+
+
+/*
+ * DTrace sysctl handlers
+ *
+ * These declarations and functions are used for a deeper DTrace configuration.
+ * Most of them are not per-consumer basis and may impact the other DTrace
+ * consumers. Correctness may not be supported for all the variables, so you
+ * should be careful about what values you are using.
+ */
+
+SYSCTL_DECL(_kern_dtrace);
+SYSCTL_NODE(_kern, OID_AUTO, dtrace, CTLFLAG_RW | CTLFLAG_LOCKED, 0, "dtrace");
+
+static int
+sysctl_dtrace_err_verbose SYSCTL_HANDLER_ARGS
+{
+#pragma unused(oidp, arg2)
+ int changed, error;
+ int value = *(int *) arg1;
+
+ error = sysctl_io_number(req, value, sizeof(value), &value, &changed);
+ if (error || !changed)
+ return (error);
+
+ if (value != 0 && value != 1)
+ return (ERANGE);
+
+ lck_mtx_lock(&dtrace_lock);
+ dtrace_err_verbose = value;
+ lck_mtx_unlock(&dtrace_lock);
+
+ return (0);
+}
+
+/*
+ * kern.dtrace.err_verbose
+ *
+ * Set DTrace verbosity when an error occured (0 = disabled, 1 = enabld).
+ * Errors are reported when a DIFO or a DOF has been rejected by the kernel.
+ */
+SYSCTL_PROC(_kern_dtrace, OID_AUTO, err_verbose,
+ CTLTYPE_INT | CTLFLAG_RW | CTLFLAG_LOCKED,
+ &dtrace_err_verbose, 0,
+ sysctl_dtrace_err_verbose, "I", "dtrace error verbose");
+
+static int
+sysctl_dtrace_buffer_memory_maxsize SYSCTL_HANDLER_ARGS
+{
+#pragma unused(oidp, arg2, req)
+ int changed, error;
+ uint64_t value = *(uint64_t *) arg1;
+
+ error = sysctl_io_number(req, value, sizeof(value), &value, &changed);
+ if (error || !changed)
+ return (error);
+
+ if (value <= dtrace_buffer_memory_inuse)
+ return (ERANGE);
+
+ lck_mtx_lock(&dtrace_lock);
+ dtrace_buffer_memory_maxsize = value;
+ lck_mtx_unlock(&dtrace_lock);
+
+ return (0);
+}
+
+/*
+ * kern.dtrace.buffer_memory_maxsize
+ *
+ * Set DTrace maximal size in bytes used by all the consumers' state buffers. By default
+ * the limit is PHYS_MEM / 3 for *all* consumers. Attempting to set a null, a negative value
+ * or a value <= to dtrace_buffer_memory_inuse will result in a failure.
+ */
+SYSCTL_PROC(_kern_dtrace, OID_AUTO, buffer_memory_maxsize,
+ CTLTYPE_QUAD | CTLFLAG_RW | CTLFLAG_LOCKED,
+ &dtrace_buffer_memory_maxsize, 0,
+ sysctl_dtrace_buffer_memory_maxsize, "Q", "dtrace state buffer memory maxsize");
+
+/*
+ * kern.dtrace.buffer_memory_inuse
+ *
+ * Current state buffer memory used, in bytes, by all the DTrace consumers.
+ * This value is read-only.
+ */
+SYSCTL_QUAD(_kern_dtrace, OID_AUTO, buffer_memory_inuse, CTLFLAG_RD | CTLFLAG_LOCKED,
+ &dtrace_buffer_memory_inuse, "dtrace state buffer memory in-use");
+
+static int
+sysctl_dtrace_difo_maxsize SYSCTL_HANDLER_ARGS
+{
+#pragma unused(oidp, arg2, req)
+ int changed, error;
+ size_t value = *(size_t*) arg1;
+
+ error = sysctl_io_number(req, value, sizeof(value), &value, &changed);
+ if (error || !changed)
+ return (error);
+
+ if (value <= 0)
+ return (ERANGE);
+
+ lck_mtx_lock(&dtrace_lock);
+ dtrace_difo_maxsize = value;
+ lck_mtx_unlock(&dtrace_lock);
+
+ return (0);
+}
+
+/*
+ * kern.dtrace.difo_maxsize
+ *
+ * Set the DIFO max size in bytes, check the definition of dtrace_difo_maxsize
+ * to get the default value. Attempting to set a null or negative size will
+ * result in a failure.
+ */
+SYSCTL_PROC(_kern_dtrace, OID_AUTO, difo_maxsize,
+ CTLTYPE_QUAD | CTLFLAG_RW | CTLFLAG_LOCKED,
+ &dtrace_difo_maxsize, 0,
+ sysctl_dtrace_difo_maxsize, "Q", "dtrace difo maxsize");
+
+static int
+sysctl_dtrace_dof_maxsize SYSCTL_HANDLER_ARGS
+{
+#pragma unused(oidp, arg2, req)
+ int changed, error;
+ dtrace_optval_t value = *(dtrace_optval_t *) arg1;
+
+ error = sysctl_io_number(req, value, sizeof(value), &value, &changed);
+ if (error || !changed)
+ return (error);
+
+ if (value <= 0)
+ return (ERANGE);
+
+ lck_mtx_lock(&dtrace_lock);
+ dtrace_dof_maxsize = value;
+ lck_mtx_unlock(&dtrace_lock);
+
+ return (0);
+}
+
+/*
+ * kern.dtrace.dof_maxsize
+ *
+ * Set the DOF max size in bytes, check the definition of dtrace_dof_maxsize to
+ * get the default value. Attempting to set a null or negative size will result
+ * in a failure.
+ */
+SYSCTL_PROC(_kern_dtrace, OID_AUTO, dof_maxsize,
+ CTLTYPE_QUAD | CTLFLAG_RW | CTLFLAG_LOCKED,
+ &dtrace_dof_maxsize, 0,
+ sysctl_dtrace_dof_maxsize, "Q", "dtrace dof maxsize");
+
+static int
+sysctl_dtrace_statvar_maxsize SYSCTL_HANDLER_ARGS
+{
+#pragma unused(oidp, arg2, req)
+ int changed, error;
+ dtrace_optval_t value = *(dtrace_optval_t*) arg1;
+
+ error = sysctl_io_number(req, value, sizeof(value), &value, &changed);
+ if (error || !changed)
+ return (error);
+
+ if (value <= 0)
+ return (ERANGE);
+ if (value > dtrace_statvar_maxsize_max)
+ return (ERANGE);
+
+ lck_mtx_lock(&dtrace_lock);
+ dtrace_statvar_maxsize = value;
+ lck_mtx_unlock(&dtrace_lock);
+
+ return (0);
+}
+
+/*
+ * kern.dtrace.global_maxsize
+ *
+ * Set the variable max size in bytes, check the definition of
+ * dtrace_statvar_maxsize to get the default value. Attempting to set a null,
+ * too high or negative size will result in a failure.
+ */
+SYSCTL_PROC(_kern_dtrace, OID_AUTO, global_maxsize,
+ CTLTYPE_QUAD | CTLFLAG_RW | CTLFLAG_LOCKED,
+ &dtrace_statvar_maxsize, 0,
+ sysctl_dtrace_statvar_maxsize, "Q", "dtrace statvar maxsize");
+
+static int
+sysctl_dtrace_provide_private_probes SYSCTL_HANDLER_ARGS
+{
+#pragma unused(oidp, arg2)
+ int error;
+ int value = *(int *) arg1;
+
+ error = sysctl_io_number(req, value, sizeof(value), &value, NULL);
+ if (error)
+ return (error);
+
+ if (value != 0 && value != 1)
+ return (ERANGE);
+
+ lck_mtx_lock(&dtrace_lock);
+ dtrace_provide_private_probes = value;
+ lck_mtx_unlock(&dtrace_lock);
+
+ return (0);
+}
+
+/*
+ * kern.dtrace.provide_private_probes
+ *
+ * Set whether the providers must provide the private probes. This is
+ * mainly used by the FBT provider to request probes for the private/static
+ * symbols.
+ */
+SYSCTL_PROC(_kern_dtrace, OID_AUTO, provide_private_probes,
+ CTLTYPE_INT | CTLFLAG_RW | CTLFLAG_LOCKED,
+ &dtrace_provide_private_probes, 0,
+ sysctl_dtrace_provide_private_probes, "I", "provider must provide the private probes");
/*
* DTrace Probe Context Functions
}
static int
-dtrace_canstore_statvar(uint64_t addr, size_t sz,
+dtrace_canstore_statvar(uint64_t addr, size_t sz, size_t *remain,
dtrace_statvar_t **svars, int nsvars)
{
int i;
+ size_t maxglobalsize, maxlocalsize;
+
+ maxglobalsize = dtrace_statvar_maxsize + sizeof (uint64_t);
+ maxlocalsize = (maxglobalsize) * NCPU;
+
+ if (nsvars == 0)
+ return (0);
+
for (i = 0; i < nsvars; i++) {
dtrace_statvar_t *svar = svars[i];
+ uint8_t scope;
+ size_t size;
- if (svar == NULL || svar->dtsv_size == 0)
+ if (svar == NULL || (size = svar->dtsv_size) == 0)
continue;
- if (DTRACE_INRANGE(addr, sz, svar->dtsv_data, svar->dtsv_size))
+ scope = svar->dtsv_var.dtdv_scope;
+
+ /**
+ * We verify that our size is valid in the spirit of providing
+ * defense in depth: we want to prevent attackers from using
+ * DTrace to escalate an orthogonal kernel heap corruption bug
+ * into the ability to store to arbitrary locations in memory.
+ */
+ VERIFY((scope == DIFV_SCOPE_GLOBAL && size <= maxglobalsize) ||
+ (scope == DIFV_SCOPE_LOCAL && size <= maxlocalsize));
+
+ if (DTRACE_INRANGE(addr, sz, svar->dtsv_data, svar->dtsv_size)) {
+ DTRACE_RANGE_REMAIN(remain, addr, svar->dtsv_data,
+ svar->dtsv_size);
return (1);
+ }
}
return (0);
static int
dtrace_canstore(uint64_t addr, size_t sz, dtrace_mstate_t *mstate,
dtrace_vstate_t *vstate)
+{
+ return (dtrace_canstore_remains(addr, sz, NULL, mstate, vstate));
+}
+/*
+ * Implementation of dtrace_canstore which communicates the upper bound of the
+ * allowed memory region.
+ */
+static int
+dtrace_canstore_remains(uint64_t addr, size_t sz, size_t *remain,
+ dtrace_mstate_t *mstate, dtrace_vstate_t *vstate)
{
/*
* First, check to see if the address is in scratch space...
*/
if (DTRACE_INRANGE(addr, sz, mstate->dtms_scratch_base,
- mstate->dtms_scratch_size))
+ mstate->dtms_scratch_size)) {
+ DTRACE_RANGE_REMAIN(remain, addr, mstate->dtms_scratch_base,
+ mstate->dtms_scratch_size);
return (1);
-
+ }
/*
* Now check to see if it's a dynamic variable. This check will pick
* up both thread-local variables and any global dynamically-allocated
uintptr_t base = (uintptr_t)dstate->dtds_base +
(dstate->dtds_hashsize * sizeof (dtrace_dynhash_t));
uintptr_t chunkoffs;
+ dtrace_dynvar_t *dvar;
/*
* Before we assume that we can store here, we need to make
*
* (3) Not span a chunk boundary
*
+ * (4) Not be in the tuple space of a dynamic variable
+ *
*/
if (addr < base)
return (0);
if (chunkoffs + sz > dstate->dtds_chunksize)
return (0);
+ dvar = (dtrace_dynvar_t *)((uintptr_t)addr - chunkoffs);
+
+ if (dvar->dtdv_hashval == DTRACE_DYNHASH_FREE)
+ return (0);
+
+ if (chunkoffs < sizeof (dtrace_dynvar_t) +
+ ((dvar->dtdv_tuple.dtt_nkeys - 1) * sizeof (dtrace_key_t)))
+ return (0);
+
return (1);
}
* Finally, check the static local and global variables. These checks
* take the longest, so we perform them last.
*/
- if (dtrace_canstore_statvar(addr, sz,
+ if (dtrace_canstore_statvar(addr, sz, remain,
vstate->dtvs_locals, vstate->dtvs_nlocals))
return (1);
- if (dtrace_canstore_statvar(addr, sz,
+ if (dtrace_canstore_statvar(addr, sz, remain,
vstate->dtvs_globals, vstate->dtvs_nglobals))
return (1);
dtrace_canload(uint64_t addr, size_t sz, dtrace_mstate_t *mstate,
dtrace_vstate_t *vstate)
{
-#if !defined(__APPLE__) /* Quiet compiler warning - matches dtrace_dif_emulate */
- volatile uintptr_t *illval = &cpu_core[CPU->cpu_id].cpuc_dtrace_illval;
-#else
+ return (dtrace_canload_remains(addr, sz, NULL, mstate, vstate));
+}
+
+/*
+ * Implementation of dtrace_canload which communicates the upper bound of the
+ * allowed memory region.
+ */
+static int
+dtrace_canload_remains(uint64_t addr, size_t sz, size_t *remain,
+ dtrace_mstate_t *mstate, dtrace_vstate_t *vstate)
+{
volatile uint64_t *illval = &cpu_core[CPU->cpu_id].cpuc_dtrace_illval;
-#endif /* __APPLE */
/*
* If we hold the privilege to read from kernel memory, then
* everything is readable.
*/
- if ((mstate->dtms_access & DTRACE_ACCESS_KERNEL) != 0)
+ if ((mstate->dtms_access & DTRACE_ACCESS_KERNEL) != 0) {
+ DTRACE_RANGE_REMAIN(remain, addr, addr, sz);
return (1);
+ }
/*
* You can obviously read that which you can store.
*/
- if (dtrace_canstore(addr, sz, mstate, vstate))
+ if (dtrace_canstore_remains(addr, sz, remain, mstate, vstate))
return (1);
/*
* We're allowed to read from our own string table.
*/
if (DTRACE_INRANGE(addr, sz, (uintptr_t)mstate->dtms_difo->dtdo_strtab,
- mstate->dtms_difo->dtdo_strlen))
+ mstate->dtms_difo->dtdo_strlen)) {
+ DTRACE_RANGE_REMAIN(remain, addr,
+ mstate->dtms_difo->dtdo_strtab,
+ mstate->dtms_difo->dtdo_strlen);
return (1);
+ }
DTRACE_CPUFLAG_SET(CPU_DTRACE_KPRIV);
*illval = addr;
* calls in the event that the user has all privileges.
*/
static int
-dtrace_strcanload(uint64_t addr, size_t sz, dtrace_mstate_t *mstate,
- dtrace_vstate_t *vstate)
+dtrace_strcanload(uint64_t addr, size_t sz, size_t *remain,
+ dtrace_mstate_t *mstate, dtrace_vstate_t *vstate)
{
- size_t strsz;
+ size_t rsize;
/*
* If we hold the privilege to read from kernel memory, then
* everything is readable.
*/
- if ((mstate->dtms_access & DTRACE_ACCESS_KERNEL) != 0)
+ if ((mstate->dtms_access & DTRACE_ACCESS_KERNEL) != 0) {
+ DTRACE_RANGE_REMAIN(remain, addr, addr, sz);
return (1);
+ }
- strsz = 1 + dtrace_strlen((char *)(uintptr_t)addr, sz);
- if (dtrace_canload(addr, strsz, mstate, vstate))
- return (1);
+ /*
+ * Even if the caller is uninterested in querying the remaining valid
+ * range, it is required to ensure that the access is allowed.
+ */
+ if (remain == NULL) {
+ remain = &rsize;
+ }
+ if (dtrace_canload_remains(addr, 0, remain, mstate, vstate)) {
+ size_t strsz;
+ /*
+ * Perform the strlen after determining the length of the
+ * memory region which is accessible. This prevents timing
+ * information from being used to find NULs in memory which is
+ * not accessible to the caller.
+ */
+ strsz = 1 + dtrace_strlen((char *)(uintptr_t)addr,
+ MIN(sz, *remain));
+ if (strsz <= *remain) {
+ return (1);
+ }
+ }
return (0);
}
* region in which a load may be issued given the user's privilege level.
*/
static int
-dtrace_vcanload(void *src, dtrace_diftype_t *type, dtrace_mstate_t *mstate,
- dtrace_vstate_t *vstate)
+dtrace_vcanload(void *src, dtrace_diftype_t *type, size_t *remain,
+ dtrace_mstate_t *mstate, dtrace_vstate_t *vstate)
{
size_t sz;
ASSERT(type->dtdt_flags & DIF_TF_BYREF);
+ /*
+ * Calculate the max size before performing any checks since even
+ * DTRACE_ACCESS_KERNEL-credentialed callers expect that this function
+ * return the max length via 'remain'.
+ */
+ if (type->dtdt_kind == DIF_TYPE_STRING) {
+ dtrace_state_t *state = vstate->dtvs_state;
+
+ if (state != NULL) {
+ sz = state->dts_options[DTRACEOPT_STRSIZE];
+ } else {
+ /*
+ * In helper context, we have a NULL state; fall back
+ * to using the system-wide default for the string size
+ * in this case.
+ */
+ sz = dtrace_strsize_default;
+ }
+ } else {
+ sz = type->dtdt_size;
+ }
+
/*
* If we hold the privilege to read from kernel memory, then
* everything is readable.
*/
- if ((mstate->dtms_access & DTRACE_ACCESS_KERNEL) != 0)
+ if ((mstate->dtms_access & DTRACE_ACCESS_KERNEL) != 0) {
+ DTRACE_RANGE_REMAIN(remain, (uintptr_t)src, src, sz);
return (1);
+ }
- if (type->dtdt_kind == DIF_TYPE_STRING)
- sz = dtrace_strlen(src,
- vstate->dtvs_state->dts_options[DTRACEOPT_STRSIZE]) + 1;
- else
- sz = type->dtdt_size;
-
- return (dtrace_canload((uintptr_t)src, sz, mstate, vstate));
+ if (type->dtdt_kind == DIF_TYPE_STRING) {
+ return (dtrace_strcanload((uintptr_t)src, sz, remain, mstate,
+ vstate));
+ }
+ return (dtrace_canload_remains((uintptr_t)src, sz, remain, mstate,
+ vstate));
}
/*
* specified type; we assume that we can store to directly.
*/
static void
-dtrace_vcopy(void *src, void *dst, dtrace_diftype_t *type)
+dtrace_vcopy(void *src, void *dst, dtrace_diftype_t *type, size_t limit)
{
ASSERT(type->dtdt_flags & DIF_TF_BYREF);
if (type->dtdt_kind == DIF_TYPE_STRING) {
- dtrace_strcpy(src, dst, type->dtdt_size);
+ dtrace_strcpy(src, dst, MIN(type->dtdt_size, limit));
} else {
- dtrace_bcopy(src, dst, type->dtdt_size);
-}
+ dtrace_bcopy(src, dst, MIN(type->dtdt_size, limit));
+ }
}
/*
*/
ASSERT(s_cr != NULL);
-#if !defined(__APPLE__)
- if ((cr = CRED()) != NULL &&
-#else
if ((cr = dtrace_CRED()) != NULL &&
-#endif /* __APPLE__ */
posix_cred_get(s_cr)->cr_uid == posix_cred_get(cr)->cr_uid &&
posix_cred_get(s_cr)->cr_uid == posix_cred_get(cr)->cr_ruid &&
posix_cred_get(s_cr)->cr_uid == posix_cred_get(cr)->cr_suid &&
dtrace_priv_proc_common_zone(dtrace_state_t *state)
{
cred_t *cr, *s_cr = state->dts_cred.dcr_cred;
-#pragma unused(cr, s_cr) /* __APPLE__ */
+#pragma unused(cr, s_cr, state) /* __APPLE__ */
/*
* We should always have a non-NULL state cred here, since if cred
*/
ASSERT(s_cr != NULL);
-#if !defined(__APPLE__)
- if ((cr = CRED()) != NULL &&
- s_cr->cr_zone == cr->cr_zone)
- return (1);
-
- return (0);
-#else
-#pragma unused(state)
-
- return 1; /* Darwin doesn't do zones. */
-#endif /* __APPLE__ */
+ return 1; /* APPLE NOTE: Darwin doesn't do zones. */
}
/*
* This privilege check should be used by actions and subroutines to
* verify that the process has not setuid or changed credentials.
*/
-#if !defined(__APPLE__)
-static int
-dtrace_priv_proc_common_nocd()
-{
- proc_t *proc;
-
- if ((proc = ttoproc(curthread)) != NULL &&
- !(proc->p_flag & SNOCD))
- return (1);
-
- return (0);
-}
-#else
static int
dtrace_priv_proc_common_nocd(void)
{
return 1; /* Darwin omits "No Core Dump" flag. */
}
-#endif /* __APPLE__ */
static int
dtrace_priv_proc_destructive(dtrace_state_t *state)
{
int action = state->dts_cred.dcr_action;
-#if defined(__APPLE__)
if (ISSET(current_proc()->p_lflag, P_LNOATTACH))
goto bad;
-#endif /* __APPLE__ */
+
+ if (dtrace_is_restricted() && !dtrace_can_attach_to_proc(current_proc()))
+ goto bad;
if (((action & DTRACE_CRA_PROC_DESTRUCTIVE_ALLZONE) == 0) &&
dtrace_priv_proc_common_zone(state) == 0)
static int
dtrace_priv_proc_control(dtrace_state_t *state)
{
-#if defined(__APPLE__)
if (ISSET(current_proc()->p_lflag, P_LNOATTACH))
goto bad;
-#endif /* __APPLE__ */
+
+ if (dtrace_is_restricted() && !dtrace_can_attach_to_proc(current_proc()))
+ goto bad;
if (state->dts_cred.dcr_action & DTRACE_CRA_PROC_CONTROL)
return (1);
dtrace_priv_proc_common_nocd())
return (1);
-#if defined(__APPLE__)
bad:
-#endif /* __APPLE__ */
cpu_core[CPU->cpu_id].cpuc_dtrace_flags |= CPU_DTRACE_UPRIV;
return (0);
static int
dtrace_priv_proc(dtrace_state_t *state)
{
-#if defined(__APPLE__)
if (ISSET(current_proc()->p_lflag, P_LNOATTACH))
goto bad;
-#endif /* __APPLE__ */
+
+ if (dtrace_is_restricted() && !dtrace_are_restrictions_relaxed() && !dtrace_can_attach_to_proc(current_proc()))
+ goto bad;
if (state->dts_cred.dcr_action & DTRACE_CRA_PROC)
return (1);
-#if defined(__APPLE__)
bad:
-#endif /* __APPLE__ */
cpu_core[CPU->cpu_id].cpuc_dtrace_flags |= CPU_DTRACE_UPRIV;
return (0);
}
-#if defined(__APPLE__)
-/* dtrace_priv_proc() omitting the P_LNOATTACH check. For PID and EXECNAME accesses. */
+/*
+ * The P_LNOATTACH check is an Apple specific check.
+ * We need a version of dtrace_priv_proc() that omits
+ * that check for PID and EXECNAME accesses
+ */
static int
dtrace_priv_proc_relaxed(dtrace_state_t *state)
{
return (0);
}
-#endif /* __APPLE__ */
static int
dtrace_priv_kernel(dtrace_state_t *state)
{
+ if (dtrace_is_restricted() && !dtrace_are_restrictions_relaxed())
+ goto bad;
+
if (state->dts_cred.dcr_action & DTRACE_CRA_KERNEL)
return (1);
+bad:
cpu_core[CPU->cpu_id].cpuc_dtrace_flags |= CPU_DTRACE_KPRIV;
return (0);
static int
dtrace_priv_kernel_destructive(dtrace_state_t *state)
{
+ if (dtrace_is_restricted())
+ goto bad;
+
if (state->dts_cred.dcr_action & DTRACE_CRA_KERNEL_DESTRUCTIVE)
return (1);
+bad:
cpu_core[CPU->cpu_id].cpuc_dtrace_flags |= CPU_DTRACE_KPRIV;
return (0);
* clean the dirty dynamic variable lists on all CPUs. Dynamic variable
* cleaning is explained in detail in <sys/dtrace_impl.h>.
*/
-#if defined(__APPLE__) /* Quiet compiler warning. */
-static
-#endif /* __APPLE__ */
-void
+static void
dtrace_dynvar_clean(dtrace_dstate_t *dstate)
{
dtrace_dynvar_t *dirty;
* variable can be allocated. If NULL is returned, the appropriate counter
* will be incremented.
*/
-#if defined(__APPLE__) /* Quiet compiler warning. */
-static
-#endif /* __APPLE__ */
-dtrace_dynvar_t *
+static dtrace_dynvar_t *
dtrace_dynvar(dtrace_dstate_t *dstate, uint_t nkeys,
dtrace_key_t *key, size_t dsize, dtrace_dynvar_op_t op,
dtrace_mstate_t *mstate, dtrace_vstate_t *vstate)
while ((lock = *lockp) & 1)
continue;
-#if !defined(__APPLE__) /* Quiet compiler warning */
- if (dtrace_casptr((void *)lockp,
- (void *)lock, (void *)(lock + 1)) == (void *)lock)
- break;
-#else
if (dtrace_casptr((void *)(uintptr_t)lockp,
(void *)lock, (void *)(lock + 1)) == (void *)lock)
break;
-#endif /* __APPLE__ */
}
dtrace_membar_producer();
{
dtrace_speculation_t *spec;
dtrace_buffer_t *src, *dest;
- uintptr_t daddr, saddr, dlimit;
-#if !defined(__APPLE__) /* Quiet compiler warning */
- dtrace_speculation_state_t current, new;
-#else
+ uintptr_t daddr, saddr, dlimit, slimit;
dtrace_speculation_state_t current, new = DTRACESPEC_INACTIVE;
-#endif /* __APPLE__ */
intptr_t offs;
+ uint64_t timestamp;
if (which == 0)
return;
-#if !defined(__APPLE__) /* Quiet compiler warning */
- if (which > state->dts_nspeculations) {
- cpu_core[cpu].cpuc_dtrace_flags |= CPU_DTRACE_ILLOP;
- return;
- }
-#else
if (which > (dtrace_specid_t)state->dts_nspeculations) {
cpu_core[cpu].cpuc_dtrace_flags |= CPU_DTRACE_ILLOP;
return;
}
-#endif /* __APPLE__ */
spec = &state->dts_speculations[which - 1];
src = &spec->dtsp_buffer[cpu];
}
/*
- * We have the space; copy the buffer across. (Note that this is a
+ * We have sufficient space to copy the speculative buffer into the
+ * primary buffer. First, modify the speculative buffer, filling
+ * in the timestamp of all entries with the current time. The data
+ * must have the commit() time rather than the time it was traced,
+ * so that all entries in the primary buffer are in timestamp order.
+ */
+ timestamp = dtrace_gethrtime();
+ saddr = (uintptr_t)src->dtb_tomax;
+ slimit = saddr + src->dtb_offset;
+ while (saddr < slimit) {
+ size_t size;
+ dtrace_rechdr_t *dtrh = (dtrace_rechdr_t *)saddr;
+
+ if (dtrh->dtrh_epid == DTRACE_EPIDNONE) {
+ saddr += sizeof (dtrace_epid_t);
+ continue;
+ }
+
+ ASSERT(dtrh->dtrh_epid <= ((dtrace_epid_t) state->dts_necbs));
+ size = state->dts_ecbs[dtrh->dtrh_epid - 1]->dte_size;
+
+ ASSERT(saddr + size <= slimit);
+ ASSERT(size >= sizeof(dtrace_rechdr_t));
+ ASSERT(DTRACE_RECORD_LOAD_TIMESTAMP(dtrh) == UINT64_MAX);
+
+ DTRACE_RECORD_STORE_TIMESTAMP(dtrh, timestamp);
+
+ saddr += size;
+ }
+
+ /*
+ * Copy the buffer across. (Note that this is a
* highly subobtimal bcopy(); in the unlikely event that this becomes
* a serious performance issue, a high-performance DTrace-specific
* bcopy() should obviously be invented.)
dtrace_specid_t which)
{
dtrace_speculation_t *spec;
-#if !defined(__APPLE__) /* Quiet compiler warning */
- dtrace_speculation_state_t current, new;
-#else
dtrace_speculation_state_t current, new = DTRACESPEC_INACTIVE;
-#endif /* __APPLE__ */
dtrace_buffer_t *buf;
if (which == 0)
return;
-#if !defined(__APPLE__) /* Quiet compiler warning */
- if (which > state->dts_nspeculations) {
- cpu_core[cpu].cpuc_dtrace_flags |= CPU_DTRACE_ILLOP;
- return;
- }
-#else
if (which > (dtrace_specid_t)state->dts_nspeculations) {
cpu_core[cpu].cpuc_dtrace_flags |= CPU_DTRACE_ILLOP;
return;
}
-#endif /* __APPLE__ */
spec = &state->dts_speculations[which - 1];
buf = &spec->dtsp_buffer[cpu];
return;
}
-#if !defined(__APPLE__) /* Quiet compiler warning */
- for (i = 0; i < state->dts_nspeculations; i++) {
-#else
for (i = 0; i < (dtrace_specid_t)state->dts_nspeculations; i++) {
-#endif /* __APPLE__ */
dtrace_speculation_t *spec = &state->dts_speculations[i];
dtrace_buffer_t *src = &spec->dtsp_buffer[cpu];
static void
dtrace_speculation_clean(dtrace_state_t *state)
{
-#if !defined(__APPLE__) /* Quiet compiler warning */
- int work = 0, rv;
-#else
int work = 0;
uint32_t rv;
-#endif /* __APPLE__ */
dtrace_specid_t i;
-#if !defined(__APPLE__) /* Quiet compiler warning */
- for (i = 0; i < state->dts_nspeculations; i++) {
-#else
for (i = 0; i < (dtrace_specid_t)state->dts_nspeculations; i++) {
-#endif /* __APPLE__ */
dtrace_speculation_t *spec = &state->dts_speculations[i];
ASSERT(!spec->dtsp_cleaning);
* speculation buffers, as appropriate. We can now set the state
* to inactive.
*/
-#if !defined(__APPLE__) /* Quiet compiler warning */
- for (i = 0; i < state->dts_nspeculations; i++) {
-#else
for (i = 0; i < (dtrace_specid_t)state->dts_nspeculations; i++) {
-#endif /* __APPLE__ */
dtrace_speculation_t *spec = &state->dts_speculations[i];
dtrace_speculation_state_t current, new;
dtrace_specid_t which)
{
dtrace_speculation_t *spec;
-#if !defined(__APPLE__) /* Quiet compiler warning */
- dtrace_speculation_state_t current, new;
-#else
dtrace_speculation_state_t current, new = DTRACESPEC_INACTIVE;
-#endif /* __APPLE__ */
dtrace_buffer_t *buf;
if (which == 0)
return (NULL);
-#if !defined(__APPLE__) /* Quiet compiler warning */
- if (which > state->dts_nspeculations) {
-#else
if (which > (dtrace_specid_t)state->dts_nspeculations) {
-#endif /* __APPLE__ */
cpu_core[cpuid].cpuc_dtrace_flags |= CPU_DTRACE_ILLOP;
return (NULL);
}
* dtrace_dif_variable() uses this routine as a helper for various
* builtin values such as 'execname' and 'probefunc.'
*/
-#if defined(__APPLE__) /* Quiet compiler warning. */
static
-#endif /* __APPLE__ */
uintptr_t
dtrace_dif_varstr(uintptr_t addr, dtrace_state_t *state,
dtrace_mstate_t *mstate)
if (mstate->dtms_scratch_ptr + strsz >
mstate->dtms_scratch_base + mstate->dtms_scratch_size) {
DTRACE_CPUFLAG_SET(CPU_DTRACE_NOSCRATCH);
- return (NULL);
+ return (0);
}
dtrace_strcpy((const void *)addr, (void *)mstate->dtms_scratch_ptr,
ASSERT(mstate->dtms_present & DTRACE_MSTATE_ARGS);
if (ndx >= sizeof (mstate->dtms_arg) /
sizeof (mstate->dtms_arg[0])) {
-#if !defined(__APPLE__)
- int aframes = mstate->dtms_probe->dtpr_aframes + 2;
-#else
- /* Account for introduction of __dtrace_probe() on xnu. */
+ /*
+ * APPLE NOTE: Account for introduction of __dtrace_probe()
+ */
int aframes = mstate->dtms_probe->dtpr_aframes + 3;
-#endif /* __APPLE__ */
dtrace_provider_t *pv;
uint64_t val;
val = pv->dtpv_pops.dtps_getargval(pv->dtpv_arg,
mstate->dtms_probe->dtpr_id,
mstate->dtms_probe->dtpr_arg, ndx, aframes);
-#if defined(__APPLE__)
/* Special case access of arg5 as passed to dtrace_probe_error() (which see.) */
else if (mstate->dtms_probe->dtpr_id == dtrace_probeid_error && ndx == 5) {
return ((dtrace_state_t *)(uintptr_t)(mstate->dtms_arg[0]))->dts_arg_error_illval;
}
-#endif /* __APPLE__ */
+
else
val = dtrace_getarg(ndx, aframes);
return (mstate->dtms_arg[ndx]);
-#if !defined(__APPLE__)
- case DIF_VAR_UREGS: {
- klwp_t *lwp;
-
- if (!dtrace_priv_proc(state))
- return (0);
-
- if ((lwp = curthread->t_lwp) == NULL) {
- DTRACE_CPUFLAG_SET(CPU_DTRACE_BADADDR);
- cpu_core[CPU->cpu_id].cpuc_dtrace_illval = NULL;
- return (0);
- }
-
- return (dtrace_getreg(lwp->lwp_regs, ndx));
- }
-#else
case DIF_VAR_UREGS: {
thread_t thread;
return (dtrace_getreg(find_user_regs(thread), ndx));
}
-#endif /* __APPLE__ */
-#if !defined(__APPLE__)
- case DIF_VAR_CURTHREAD:
- if (!dtrace_priv_kernel(state))
- return (0);
- return ((uint64_t)(uintptr_t)curthread);
-#else
+
case DIF_VAR_CURTHREAD:
if (!dtrace_priv_kernel(state))
return (0);
return ((uint64_t)(uintptr_t)current_thread());
-#endif /* __APPLE__ */
case DIF_VAR_TIMESTAMP:
if (!(mstate->dtms_present & DTRACE_MSTATE_TIMESTAMP)) {
}
return (mstate->dtms_timestamp);
-#if !defined(__APPLE__)
- case DIF_VAR_VTIMESTAMP:
- ASSERT(dtrace_vtime_references != 0);
- return (curthread->t_dtrace_vtime);
-#else
case DIF_VAR_VTIMESTAMP:
ASSERT(dtrace_vtime_references != 0);
return (dtrace_get_thread_vtime(current_thread()));
-#endif /* __APPLE__ */
case DIF_VAR_WALLTIMESTAMP:
if (!(mstate->dtms_present & DTRACE_MSTATE_WALLTIMESTAMP)) {
}
return (mstate->dtms_walltimestamp);
+ case DIF_VAR_MACHTIMESTAMP:
+ if (!(mstate->dtms_present & DTRACE_MSTATE_MACHTIMESTAMP)) {
+ mstate->dtms_machtimestamp = mach_absolute_time();
+ mstate->dtms_present |= DTRACE_MSTATE_MACHTIMESTAMP;
+ }
+ return (mstate->dtms_machtimestamp);
+
+ case DIF_VAR_CPU:
+ return ((uint64_t) dtrace_get_thread_last_cpu_id(current_thread()));
+
case DIF_VAR_IPL:
if (!dtrace_priv_kernel(state))
return (0);
if (!dtrace_priv_kernel(state))
return (0);
if (!(mstate->dtms_present & DTRACE_MSTATE_STACKDEPTH)) {
-#if !defined(__APPLE__)
- int aframes = mstate->dtms_probe->dtpr_aframes + 2;
-#else
- /* Account for introduction of __dtrace_probe() on xnu. */
+ /*
+ * APPLE NOTE: Account for introduction of __dtrace_probe()
+ */
int aframes = mstate->dtms_probe->dtpr_aframes + 3;
-#endif /* __APPLE__ */
mstate->dtms_stackdepth = dtrace_getstackdepth(aframes);
mstate->dtms_present |= DTRACE_MSTATE_STACKDEPTH;
if (!dtrace_priv_kernel(state))
return (0);
if (!(mstate->dtms_present & DTRACE_MSTATE_CALLER)) {
-#if !defined(__APPLE__)
- int aframes = mstate->dtms_probe->dtpr_aframes + 2;
-#else
- /* Account for introduction of __dtrace_probe() on xnu. */
+ /*
+ * APPLE NOTE: Account for introduction of __dtrace_probe()
+ */
int aframes = mstate->dtms_probe->dtpr_aframes + 3;
-#endif /* __APPLE__ */
if (!DTRACE_ANCHORED(mstate->dtms_probe)) {
/*
(uint32_t *)(uintptr_t)mstate->dtms_arg[0]);
mstate->dtms_caller = caller[1];
} else if ((mstate->dtms_caller =
-#if !defined(__APPLE__) /* Quiet compiler warnings */
- dtrace_caller(aframes)) == -1) {
-#else
- dtrace_caller(aframes)) == (uintptr_t)-1) {
-#endif /* __APPLE__ */
+ dtrace_caller(aframes)) == (uintptr_t)-1) {
/*
* We have failed to do this the quick way;
* we must resort to the slower approach of
* uint64_t will contain the caller, which is what
* we're after.
*/
- ustack[2] = NULL;
+ ustack[2] = 0;
DTRACE_CPUFLAG_SET(CPU_DTRACE_NOFAULT);
dtrace_getupcstack(ustack, 3);
DTRACE_CPUFLAG_CLEAR(CPU_DTRACE_NOFAULT);
(uintptr_t)mstate->dtms_probe->dtpr_name,
state, mstate));
-#if !defined(__APPLE__)
- case DIF_VAR_PID:
- if (!dtrace_priv_proc(state))
- return (0);
-
- /*
- * Note that we are assuming that an unanchored probe is
- * always due to a high-level interrupt. (And we're assuming
- * that there is only a single high level interrupt.)
- */
- if (DTRACE_ANCHORED(mstate->dtms_probe) && CPU_ON_INTR(CPU))
- return (pid0.pid_id);
-
- /*
- * It is always safe to dereference one's own t_procp pointer:
- * it always points to a valid, allocated proc structure.
- * Further, it is always safe to dereference the p_pidp member
- * of one's own proc structure. (These are truisms becuase
- * threads and processes don't clean up their own state --
- * they leave that task to whomever reaps them.)
- */
- return ((uint64_t)curthread->t_procp->p_pidp->pid_id);
-
-#else
case DIF_VAR_PID:
if (!dtrace_priv_proc_relaxed(state))
return (0);
return 0;
return ((uint64_t)dtrace_proc_selfpid());
-#endif /* __APPLE__ */
-#if !defined(__APPLE__)
- case DIF_VAR_PPID:
- if (!dtrace_priv_proc(state))
- return (0);
-
- /*
- * See comment in DIF_VAR_PID.
- */
- if (DTRACE_ANCHORED(mstate->dtms_probe) && CPU_ON_INTR(CPU))
- return (pid0.pid_id);
-
- /*
- * It is always safe to dereference one's own t_procp pointer:
- * it always points to a valid, allocated proc structure.
- * (This is true because threads don't clean up their own
- * state -- they leave that task to whomever reaps them.)
- */
- return ((uint64_t)curthread->t_procp->p_ppid);
-#else
case DIF_VAR_PPID:
if (!dtrace_priv_proc_relaxed(state))
return (0);
return (0);
return ((uint64_t)dtrace_proc_selfppid());
-#endif /* __APPLE__ */
-
-#if !defined(__APPLE__)
- case DIF_VAR_TID:
- /*
- * See comment in DIF_VAR_PID.
- */
- if (DTRACE_ANCHORED(mstate->dtms_probe) && CPU_ON_INTR(CPU))
- return (0);
- return ((uint64_t)curthread->t_tid);
-#else
case DIF_VAR_TID:
/* We do not need to check for null current_thread() */
return thread_tid(current_thread()); /* globally unique */
/* We do not need to check for null current_thread() */
return thread_dispatchqaddr(current_thread());
-#endif /* __APPLE__ */
-
-#if !defined(__APPLE__)
- case DIF_VAR_EXECNAME:
- if (!dtrace_priv_proc(state))
- return (0);
-
- /*
- * See comment in DIF_VAR_PID.
- */
- if (DTRACE_ANCHORED(mstate->dtms_probe) && CPU_ON_INTR(CPU))
- return ((uint64_t)(uintptr_t)p0.p_user.u_comm);
- /*
- * It is always safe to dereference one's own t_procp pointer:
- * it always points to a valid, allocated proc structure.
- * (This is true because threads don't clean up their own
- * state -- they leave that task to whomever reaps them.)
- */
- return (dtrace_dif_varstr(
- (uintptr_t)curthread->t_procp->p_user.u_comm,
- state, mstate));
-#else
case DIF_VAR_EXECNAME:
{
char *xname = (char *)mstate->dtms_scratch_ptr;
return (0);
mstate->dtms_scratch_ptr += scratch_size;
- proc_selfname( xname, MAXCOMLEN );
+ proc_selfname( xname, scratch_size );
return ((uint64_t)(uintptr_t)xname);
}
-#endif /* __APPLE__ */
-#if !defined(__APPLE__)
- case DIF_VAR_ZONENAME:
- if (!dtrace_priv_proc(state))
- return (0);
-
- /*
- * See comment in DIF_VAR_PID.
- */
- if (DTRACE_ANCHORED(mstate->dtms_probe) && CPU_ON_INTR(CPU))
- return ((uint64_t)(uintptr_t)p0.p_zone->zone_name);
- /*
- * It is always safe to dereference one's own t_procp pointer:
- * it always points to a valid, allocated proc structure.
- * (This is true because threads don't clean up their own
- * state -- they leave that task to whomever reaps them.)
- */
- return (dtrace_dif_varstr(
- (uintptr_t)curthread->t_procp->p_zone->zone_name,
- state, mstate));
-#else
case DIF_VAR_ZONENAME:
{
/* scratch_size is equal to length('global') + 1 for the null-terminator. */
return ((uint64_t)(uintptr_t)zname);
}
-#endif /* __APPLE__ */
-
-#if !defined(__APPLE__)
- case DIF_VAR_UID:
- if (!dtrace_priv_proc(state))
- return (0);
-
- /*
- * See comment in DIF_VAR_PID.
- */
- if (DTRACE_ANCHORED(mstate->dtms_probe) && CPU_ON_INTR(CPU))
- return ((uint64_t)p0.p_cred->cr_uid);
- /*
- * It is always safe to dereference one's own t_procp pointer:
- * it always points to a valid, allocated proc structure.
- * (This is true because threads don't clean up their own
- * state -- they leave that task to whomever reaps them.)
- *
- * Additionally, it is safe to dereference one's own process
- * credential, since this is never NULL after process birth.
- */
- return ((uint64_t)curthread->t_procp->p_cred->cr_uid);
-#else
case DIF_VAR_UID:
if (!dtrace_priv_proc_relaxed(state))
return (0);
return (0);
return ((uint64_t) dtrace_proc_selfruid());
-#endif /* __APPLE__ */
-
-#if !defined(__APPLE__)
- case DIF_VAR_GID:
- if (!dtrace_priv_proc(state))
- return (0);
-
- /*
- * See comment in DIF_VAR_PID.
- */
- if (DTRACE_ANCHORED(mstate->dtms_probe) && CPU_ON_INTR(CPU))
- return ((uint64_t)p0.p_cred->cr_gid);
- /*
- * It is always safe to dereference one's own t_procp pointer:
- * it always points to a valid, allocated proc structure.
- * (This is true because threads don't clean up their own
- * state -- they leave that task to whomever reaps them.)
- *
- * Additionally, it is safe to dereference one's own process
- * credential, since this is never NULL after process birth.
- */
- return ((uint64_t)curthread->t_procp->p_cred->cr_gid);
-#else
case DIF_VAR_GID:
if (!dtrace_priv_proc(state))
return (0);
DTRACE_CPUFLAG_SET(CPU_DTRACE_ILLOP);
return -1ULL;
}
-#endif /* __APPLE__ */
-#if !defined(__APPLE__)
case DIF_VAR_ERRNO: {
- klwp_t *lwp;
- if (!dtrace_priv_proc(state))
- return (0);
-
- /*
- * See comment in DIF_VAR_PID.
- */
- if (DTRACE_ANCHORED(mstate->dtms_probe) && CPU_ON_INTR(CPU))
- return (0);
-
- /*
- * It is always safe to dereference one's own t_lwp pointer in
- * the event that this pointer is non-NULL. (This is true
- * because threads and lwps don't clean up their own state --
- * they leave that task to whomever reaps them.)
- */
- if ((lwp = curthread->t_lwp) == NULL)
- return (0);
-
- return ((uint64_t)lwp->lwp_errno);
- }
-#else
- case DIF_VAR_ERRNO: {
- uthread_t uthread = (uthread_t)get_bsdthread_info(current_thread());
+ uthread_t uthread = (uthread_t)get_bsdthread_info(current_thread());
if (!dtrace_priv_proc(state))
return (0);
return -1ULL;
}
}
-#endif /* __APPLE__ */
default:
DTRACE_CPUFLAG_SET(CPU_DTRACE_ILLOP);
dtrace_mstate_t *mstate, dtrace_state_t *state)
{
volatile uint16_t *flags = &cpu_core[CPU->cpu_id].cpuc_dtrace_flags;
-#if !defined(__APPLE__)
- volatile uintptr_t *illval = &cpu_core[CPU->cpu_id].cpuc_dtrace_illval;
-#else
volatile uint64_t *illval = &cpu_core[CPU->cpu_id].cpuc_dtrace_illval;
-#endif /* __APPLE__ */
dtrace_vstate_t *vstate = &state->dts_vstate;
#if !defined(__APPLE__)
case DIF_SUBR_MUTEX_OWNED:
if (!dtrace_canload(tupregs[0].dttk_value, sizeof (kmutex_t),
mstate, vstate)) {
- regs[rd] = NULL;
+ regs[rd] = 0;
break;
}
case DIF_SUBR_MUTEX_OWNER:
if (!dtrace_canload(tupregs[0].dttk_value, sizeof (kmutex_t),
mstate, vstate)) {
- regs[rd] = NULL;
+ regs[rd] = 0;
break;
}
case DIF_SUBR_MUTEX_TYPE_ADAPTIVE:
if (!dtrace_canload(tupregs[0].dttk_value, sizeof (kmutex_t),
mstate, vstate)) {
- regs[rd] = NULL;
+ regs[rd] = 0;
break;
}
case DIF_SUBR_MUTEX_TYPE_SPIN:
if (!dtrace_canload(tupregs[0].dttk_value, sizeof (kmutex_t),
mstate, vstate)) {
- regs[rd] = NULL;
+ regs[rd] = 0;
break;
}
if (!dtrace_canload(tupregs[0].dttk_value, sizeof (uintptr_t),
mstate, vstate)) {
- regs[rd] = NULL;
+ regs[rd] = 0;
break;
}
case DIF_SUBR_RW_WRITE_HELD:
if (!dtrace_canload(tupregs[0].dttk_value, sizeof (krwlock_t),
mstate, vstate)) {
- regs[rd] = NULL;
+ regs[rd] = 0;
break;
}
case DIF_SUBR_RW_ISWRITER:
if (!dtrace_canload(tupregs[0].dttk_value, sizeof (krwlock_t),
mstate, vstate)) {
- regs[rd] = NULL;
+ regs[rd] = 0;
break;
}
}
if (!dtrace_canload(src, size, mstate, vstate)) {
- regs[rd] = NULL;
+ regs[rd] = 0;
break;
}
tupregs[subr == DIF_SUBR_ALLOCA ? 0 : 1].dttk_value;
size_t scratch_size = (dest - mstate->dtms_scratch_ptr) + size;
+ /*
+ * Check whether the user can access kernel memory
+ */
+ if (dtrace_priv_kernel(state) == 0) {
+ DTRACE_CPUFLAG_SET(CPU_DTRACE_KPRIV);
+ regs[rd] = 0;
+ break;
+ }
/*
* This action doesn't require any credential checks since
* probes will not activate in user contexts to which the
if (scratch_size < size ||
!DTRACE_INSCRATCH(mstate, scratch_size)) {
DTRACE_CPUFLAG_SET(CPU_DTRACE_NOSCRATCH);
- regs[rd] = NULL;
+ regs[rd] = 0;
break;
}
if (subr == DIF_SUBR_COPYIN) {
DTRACE_CPUFLAG_SET(CPU_DTRACE_NOFAULT);
-#if !defined(__APPLE__)
- dtrace_copyin(tupregs[0].dttk_value, dest, size, flags);
-#else
if (dtrace_priv_proc(state))
dtrace_copyin(tupregs[0].dttk_value, dest, size, flags);
-#endif /* __APPLE__ */
DTRACE_CPUFLAG_CLEAR(CPU_DTRACE_NOFAULT);
}
}
DTRACE_CPUFLAG_SET(CPU_DTRACE_NOFAULT);
-#if !defined(__APPLE__)
- dtrace_copyin(tupregs[0].dttk_value, dest, size, flags);
-#else
if (dtrace_priv_proc(state))
dtrace_copyin(tupregs[0].dttk_value, dest, size, flags);
-#endif /* __APPLE__ */
DTRACE_CPUFLAG_CLEAR(CPU_DTRACE_NOFAULT);
break;
}
*/
if (!DTRACE_INSCRATCH(mstate, size)) {
DTRACE_CPUFLAG_SET(CPU_DTRACE_NOSCRATCH);
- regs[rd] = NULL;
+ regs[rd] = 0;
break;
}
DTRACE_CPUFLAG_SET(CPU_DTRACE_NOFAULT);
-#if !defined(__APPLE__)
- dtrace_copyinstr(tupregs[0].dttk_value, dest, size, flags);
-#else
if (dtrace_priv_proc(state))
dtrace_copyinstr(tupregs[0].dttk_value, dest, size, flags);
-#endif /* __APPLE__ */
DTRACE_CPUFLAG_CLEAR(CPU_DTRACE_NOFAULT);
((char *)dest)[size - 1] = '\0';
break;
}
-#if !defined(__APPLE__)
- case DIF_SUBR_MSGSIZE:
- case DIF_SUBR_MSGDSIZE: {
- uintptr_t baddr = tupregs[0].dttk_value, daddr;
- uintptr_t wptr, rptr;
- size_t count = 0;
- int cont = 0;
-
- while (baddr != NULL && !(*flags & CPU_DTRACE_FAULT)) {
-
- if (!dtrace_canload(baddr, sizeof (mblk_t), mstate,
- vstate)) {
- regs[rd] = NULL;
- break;
- }
-
- wptr = dtrace_loadptr(baddr +
- offsetof(mblk_t, b_wptr));
-
- rptr = dtrace_loadptr(baddr +
- offsetof(mblk_t, b_rptr));
-
- if (wptr < rptr) {
- *flags |= CPU_DTRACE_BADADDR;
- *illval = tupregs[0].dttk_value;
- break;
- }
-
- daddr = dtrace_loadptr(baddr +
- offsetof(mblk_t, b_datap));
-
- baddr = dtrace_loadptr(baddr +
- offsetof(mblk_t, b_cont));
-
- /*
- * We want to prevent against denial-of-service here,
- * so we're only going to search the list for
- * dtrace_msgdsize_max mblks.
- */
- if (cont++ > dtrace_msgdsize_max) {
- *flags |= CPU_DTRACE_ILLOP;
- break;
- }
-
- if (subr == DIF_SUBR_MSGDSIZE) {
- if (dtrace_load8(daddr +
- offsetof(dblk_t, db_type)) != M_DATA)
- continue;
- }
-
- count += wptr - rptr;
- }
-
- if (!(*flags & CPU_DTRACE_FAULT))
- regs[rd] = count;
-
- break;
- }
-#else
case DIF_SUBR_MSGSIZE:
case DIF_SUBR_MSGDSIZE: {
/* Darwin does not implement SysV streams messages */
regs[rd] = 0;
break;
}
-#endif /* __APPLE__ */
-
-#if !defined(__APPLE__)
- case DIF_SUBR_PROGENYOF: {
- pid_t pid = tupregs[0].dttk_value;
- proc_t *p;
- int rval = 0;
-
- DTRACE_CPUFLAG_SET(CPU_DTRACE_NOFAULT);
-
- for (p = curthread->t_procp; p != NULL; p = p->p_parent) {
- if (p->p_pidp->pid_id == pid) {
- rval = 1;
- break;
- }
- }
-
- DTRACE_CPUFLAG_CLEAR(CPU_DTRACE_NOFAULT);
- regs[rd] = rval;
- break;
- }
-#else
case DIF_SUBR_PROGENYOF: {
pid_t pid = tupregs[0].dttk_value;
struct proc *p = current_proc();
regs[rd] = rval;
break;
}
-#endif /* __APPLE__ */
case DIF_SUBR_SPECULATION:
regs[rd] = dtrace_speculation(state);
break;
-#if !defined(__APPLE__)
- case DIF_SUBR_COPYOUT: {
- uintptr_t kaddr = tupregs[0].dttk_value;
- uintptr_t uaddr = tupregs[1].dttk_value;
- uint64_t size = tupregs[2].dttk_value;
-
- if (!dtrace_destructive_disallow &&
- dtrace_priv_proc_control(state) &&
- !dtrace_istoxic(kaddr, size)) {
- DTRACE_CPUFLAG_SET(CPU_DTRACE_NOFAULT);
- dtrace_copyout(kaddr, uaddr, size, flags);
- DTRACE_CPUFLAG_CLEAR(CPU_DTRACE_NOFAULT);
- }
- break;
- }
-
- case DIF_SUBR_COPYOUTSTR: {
- uintptr_t kaddr = tupregs[0].dttk_value;
- uintptr_t uaddr = tupregs[1].dttk_value;
- uint64_t size = tupregs[2].dttk_value;
- if (!dtrace_destructive_disallow &&
- dtrace_priv_proc_control(state) &&
- !dtrace_istoxic(kaddr, size)) {
- DTRACE_CPUFLAG_SET(CPU_DTRACE_NOFAULT);
- dtrace_copyoutstr(kaddr, uaddr, size, flags);
- DTRACE_CPUFLAG_CLEAR(CPU_DTRACE_NOFAULT);
- }
- break;
- }
-#else
case DIF_SUBR_COPYOUT: {
uintptr_t kaddr = tupregs[0].dttk_value;
user_addr_t uaddr = tupregs[1].dttk_value;
if (!dtrace_destructive_disallow &&
dtrace_priv_proc_control(state) &&
- !dtrace_istoxic(kaddr, size)) {
+ !dtrace_istoxic(kaddr, size) &&
+ dtrace_canload(kaddr, size, mstate, vstate)) {
DTRACE_CPUFLAG_SET(CPU_DTRACE_NOFAULT);
dtrace_copyout(kaddr, uaddr, size, flags);
DTRACE_CPUFLAG_CLEAR(CPU_DTRACE_NOFAULT);
uintptr_t kaddr = tupregs[0].dttk_value;
user_addr_t uaddr = tupregs[1].dttk_value;
uint64_t size = tupregs[2].dttk_value;
+ size_t lim;
if (!dtrace_destructive_disallow &&
dtrace_priv_proc_control(state) &&
- !dtrace_istoxic(kaddr, size)) {
+ !dtrace_istoxic(kaddr, size) &&
+ dtrace_strcanload(kaddr, size, &lim, mstate, vstate)) {
DTRACE_CPUFLAG_SET(CPU_DTRACE_NOFAULT);
- dtrace_copyoutstr(kaddr, uaddr, size, flags);
+ dtrace_copyoutstr(kaddr, uaddr, lim, flags);
DTRACE_CPUFLAG_CLEAR(CPU_DTRACE_NOFAULT);
}
break;
}
-#endif /* __APPLE__ */
case DIF_SUBR_STRLEN: {
- size_t sz;
+ size_t size = state->dts_options[DTRACEOPT_STRSIZE];
uintptr_t addr = (uintptr_t)tupregs[0].dttk_value;
- sz = dtrace_strlen((char *)addr,
- state->dts_options[DTRACEOPT_STRSIZE]);
+ size_t lim;
- if (!dtrace_canload(addr, sz + 1, mstate, vstate)) {
- regs[rd] = NULL;
+ if (!dtrace_strcanload(addr, size, &lim, mstate, vstate)) {
+ regs[rd] = 0;
break;
}
- regs[rd] = sz;
+ regs[rd] = dtrace_strlen((char *)addr, lim);
break;
}
* is DIF_SUBR_STRRCHR, we will look for the last occurrence
* of the specified character instead of the first.
*/
- uintptr_t saddr = tupregs[0].dttk_value;
uintptr_t addr = tupregs[0].dttk_value;
- uintptr_t limit = addr + state->dts_options[DTRACEOPT_STRSIZE];
+ uintptr_t addr_limit;
+ uint64_t size = state->dts_options[DTRACEOPT_STRSIZE];
+ size_t lim;
char c, target = (char)tupregs[1].dttk_value;
- for (regs[rd] = NULL; addr < limit; addr++) {
+ if (!dtrace_strcanload(addr, size, &lim, mstate, vstate)) {
+ regs[rd] = NULL;
+ break;
+ }
+ addr_limit = addr + lim;
+
+ for (regs[rd] = 0; addr < addr_limit; addr++) {
if ((c = dtrace_load8(addr)) == target) {
regs[rd] = addr;
break;
}
- if (!dtrace_canload(saddr, addr - saddr, mstate, vstate)) {
- regs[rd] = NULL;
- break;
- }
-
break;
}
regs[rd] = notfound;
if (!dtrace_canload((uintptr_t)addr, len + 1, mstate, vstate)) {
- regs[rd] = NULL;
+ regs[rd] = 0;
break;
}
if (!dtrace_canload((uintptr_t)substr, sublen + 1, mstate,
vstate)) {
- regs[rd] = NULL;
+ regs[rd] = 0;
break;
}
break;
}
-#if !defined(__APPLE__) /* Quiet compiler warnings */
- if (pos > len)
-#else
if ((size_t)pos > len)
-#endif /* __APPLE__ */
pos = len;
} else {
if (pos < 0)
pos = 0;
-#if !defined(__APPLE__) /* Quiet compiler warnings */
- if (pos >= len) {
-#else
if ((size_t)pos >= len) {
-#endif /* __APPLE__ */
if (sublen == 0)
regs[rd] = len;
break;
uintptr_t addr = tupregs[0].dttk_value;
uintptr_t tokaddr = tupregs[1].dttk_value;
uint64_t size = state->dts_options[DTRACEOPT_STRSIZE];
- uintptr_t limit, toklimit = tokaddr + size;
+ uintptr_t limit, toklimit;
+ size_t clim;
char *dest = (char *)mstate->dtms_scratch_ptr;
-#if !defined(__APPLE__) /* Quiet compiler warnings */
- uint8_t c, tokmap[32]; /* 256 / 8 */
- int i;
-#else
uint8_t c='\0', tokmap[32]; /* 256 / 8 */
uint64_t i = 0;
-#endif /* __APPLE__ */
/*
* Check both the token buffer and (later) the input buffer,
* since both could be non-scratch addresses.
*/
- if (!dtrace_strcanload(tokaddr, size, mstate, vstate)) {
- regs[rd] = NULL;
+ if (!dtrace_strcanload(tokaddr, size, &clim, mstate, vstate)) {
+ regs[rd] = 0;
break;
}
+ toklimit = tokaddr + clim;
if (!DTRACE_INSCRATCH(mstate, size)) {
DTRACE_CPUFLAG_SET(CPU_DTRACE_NOSCRATCH);
- regs[rd] = NULL;
+ regs[rd] = 0;
break;
}
- if (addr == NULL) {
+ if (addr == 0) {
/*
* If the address specified is NULL, we use our saved
* strtok pointer from the mstate. Note that this
* it behaves like an implicit clause-local variable.
*/
addr = mstate->dtms_strtok;
+ limit = mstate->dtms_strtok_limit;
} else {
/*
* If the user-specified address is non-NULL we must
* (when we fetch addr from mstate->dtms_strtok)
* would fail this access check.
*/
- if (!dtrace_strcanload(addr, size, mstate, vstate)) {
- regs[rd] = NULL;
+ if (!dtrace_strcanload(addr, size, &clim, mstate,
+ vstate)) {
+ regs[rd] = 0;
break;
- }
+ }
+ limit = addr + clim;
}
/*
tokmap[c >> 3] |= (1 << (c & 0x7));
}
- for (limit = addr + size; addr < limit; addr++) {
+ for (; addr < limit; addr++) {
/*
- * We're looking for a character that is _not_ contained
- * in the token string.
+ * We're looking for a character that is _not_
+ * contained in the token string.
*/
if ((c = dtrace_load8(addr)) == '\0')
break;
* We return NULL in this case, and we set the saved
* address to NULL as well.
*/
- regs[rd] = NULL;
- mstate->dtms_strtok = NULL;
+ regs[rd] = 0;
+ mstate->dtms_strtok = 0;
+ mstate->dtms_strtok_limit = NULL;
break;
}
regs[rd] = (uintptr_t)dest;
mstate->dtms_scratch_ptr += size;
mstate->dtms_strtok = addr;
+ mstate->dtms_strtok_limit = limit;
break;
}
int64_t i = 0;
if (!dtrace_canload(s, len + 1, mstate, vstate)) {
- regs[rd] = NULL;
+ regs[rd] = 0;
break;
}
if (!DTRACE_INSCRATCH(mstate, size)) {
DTRACE_CPUFLAG_SET(CPU_DTRACE_NOSCRATCH);
- regs[rd] = NULL;
+ regs[rd] = 0;
break;
}
}
}
-#if !defined(__APPLE__) /* Quiet compiler warnings */
- if (index >= len || index < 0) {
- remaining = 0;
- } else if (remaining < 0) {
- remaining += len - index;
- } else if (index + remaining > size) {
- remaining = size - index;
- }
-#else
if ((size_t)index >= len || index < 0) {
remaining = 0;
} else if (remaining < 0) {
} else if ((uint64_t)index + (uint64_t)remaining > size) {
remaining = size - index;
}
-#endif /* __APPLE__ */
+
for (i = 0; i < remaining; i++) {
if ((d[i] = dtrace_load8(s + index + i)) == '\0')
break;
break;
}
-#if !defined(__APPLE__)
- case DIF_SUBR_GETMAJOR:
-#ifdef _LP64
- regs[rd] = (tupregs[0].dttk_value >> NBITSMINOR64) & MAXMAJ64;
-#else
- regs[rd] = (tupregs[0].dttk_value >> NBITSMINOR) & MAXMAJ;
-#endif
- break;
-
-#else /* __APPLE__ */
case DIF_SUBR_GETMAJOR:
regs[rd] = (uintptr_t)major( (dev_t)tupregs[0].dttk_value );
break;
-#endif /* __APPLE__ */
-
-#if !defined(__APPLE__)
- case DIF_SUBR_GETMINOR:
-#ifdef _LP64
- regs[rd] = tupregs[0].dttk_value & MAXMIN64;
-#else
- regs[rd] = tupregs[0].dttk_value & MAXMIN;
-#endif
- break;
-#else /* __APPLE__ */
case DIF_SUBR_GETMINOR:
regs[rd] = (uintptr_t)minor( (dev_t)tupregs[0].dttk_value );
break;
-#endif /* __APPLE__ */
-#if !defined(__APPLE__)
case DIF_SUBR_DDI_PATHNAME: {
- /*
- * This one is a galactic mess. We are going to roughly
- * emulate ddi_pathname(), but it's made more complicated
- * by the fact that we (a) want to include the minor name and
- * (b) must proceed iteratively instead of recursively.
- */
- uintptr_t dest = mstate->dtms_scratch_ptr;
+ /* APPLE NOTE: currently unsupported on Darwin */
+ DTRACE_CPUFLAG_SET(CPU_DTRACE_ILLOP);
+ regs[rd] = 0;
+ break;
+ }
+
+ case DIF_SUBR_STRJOIN: {
+ char *d = (char *)mstate->dtms_scratch_ptr;
uint64_t size = state->dts_options[DTRACEOPT_STRSIZE];
- char *start = (char *)dest, *end = start + size - 1;
- uintptr_t daddr = tupregs[0].dttk_value;
- int64_t minor = (int64_t)tupregs[1].dttk_value;
- char *s;
- int i, len, depth = 0;
+ uintptr_t s1 = tupregs[0].dttk_value;
+ uintptr_t s2 = tupregs[1].dttk_value;
+ uint64_t i = 0, j = 0;
+ size_t lim1, lim2;
+ char c;
- /*
- * Due to all the pointer jumping we do and context we must
- * rely upon, we just mandate that the user must have kernel
- * read privileges to use this routine.
- */
- if ((mstate->dtms_access & DTRACE_ACCESS_KERNEL) == 0) {
- *flags |= CPU_DTRACE_KPRIV;
- *illval = daddr;
- regs[rd] = NULL;
+ if (!dtrace_strcanload(s1, size, &lim1, mstate, vstate) ||
+ !dtrace_strcanload(s2, size, &lim2, mstate, vstate)) {
+ regs[rd] = 0;
+ break;
}
if (!DTRACE_INSCRATCH(mstate, size)) {
DTRACE_CPUFLAG_SET(CPU_DTRACE_NOSCRATCH);
- regs[rd] = NULL;
+ regs[rd] = 0;
break;
}
- *end = '\0';
+ for (;;) {
+ if (i >= size) {
+ DTRACE_CPUFLAG_SET(CPU_DTRACE_NOSCRATCH);
+ regs[rd] = 0;
+ break;
+ }
+ c = (i >= lim1) ? '\0' : dtrace_load8(s1++);
+ if ((d[i++] = c) == '\0') {
+ i--;
+ break;
+ }
+ }
- /*
- * We want to have a name for the minor. In order to do this,
- * we need to walk the minor list from the devinfo. We want
- * to be sure that we don't infinitely walk a circular list,
- * so we check for circularity by sending a scout pointer
- * ahead two elements for every element that we iterate over;
- * if the list is circular, these will ultimately point to the
- * same element. You may recognize this little trick as the
- * answer to a stupid interview question -- one that always
- * seems to be asked by those who had to have it laboriously
- * explained to them, and who can't even concisely describe
- * the conditions under which one would be forced to resort to
- * this technique. Needless to say, those conditions are
- * found here -- and probably only here. Is this the only use
- * of this infamous trick in shipping, production code? If it
- * isn't, it probably should be...
- */
- if (minor != -1) {
- uintptr_t maddr = dtrace_loadptr(daddr +
- offsetof(struct dev_info, devi_minor));
-
- uintptr_t next = offsetof(struct ddi_minor_data, next);
- uintptr_t name = offsetof(struct ddi_minor_data,
- d_minor) + offsetof(struct ddi_minor, name);
- uintptr_t dev = offsetof(struct ddi_minor_data,
- d_minor) + offsetof(struct ddi_minor, dev);
- uintptr_t scout;
-
- if (maddr != NULL)
- scout = dtrace_loadptr(maddr + next);
-
- while (maddr != NULL && !(*flags & CPU_DTRACE_FAULT)) {
- uint64_t m;
-#ifdef _LP64
- m = dtrace_load64(maddr + dev) & MAXMIN64;
-#else
- m = dtrace_load32(maddr + dev) & MAXMIN;
-#endif
- if (m != minor) {
- maddr = dtrace_loadptr(maddr + next);
+ for (;;) {
+ if (i >= size) {
+ DTRACE_CPUFLAG_SET(CPU_DTRACE_NOSCRATCH);
+ regs[rd] = 0;
+ break;
+ }
+ c = (j++ >= lim2) ? '\0' : dtrace_load8(s2++);
+ if ((d[i++] = c) == '\0')
+ break;
+ }
- if (scout == NULL)
- continue;
+ if (i < size) {
+ mstate->dtms_scratch_ptr += i;
+ regs[rd] = (uintptr_t)d;
+ }
- scout = dtrace_loadptr(scout + next);
+ break;
+ }
- if (scout == NULL)
- continue;
+ case DIF_SUBR_LLTOSTR: {
+ int64_t i = (int64_t)tupregs[0].dttk_value;
+ int64_t val = i < 0 ? i * -1 : i;
+ uint64_t size = 22; /* enough room for 2^64 in decimal */
+ char *end = (char *)mstate->dtms_scratch_ptr + size - 1;
- scout = dtrace_loadptr(scout + next);
+ if (!DTRACE_INSCRATCH(mstate, size)) {
+ DTRACE_CPUFLAG_SET(CPU_DTRACE_NOSCRATCH);
+ regs[rd] = 0;
+ break;
+ }
- if (scout == NULL)
- continue;
+ for (*end-- = '\0'; val; val /= 10)
+ *end-- = '0' + (val % 10);
- if (scout == maddr) {
- *flags |= CPU_DTRACE_ILLOP;
- break;
- }
+ if (i == 0)
+ *end-- = '0';
- continue;
- }
+ if (i < 0)
+ *end-- = '-';
- /*
- * We have the minor data. Now we need to
- * copy the minor's name into the end of the
- * pathname.
- */
- s = (char *)dtrace_loadptr(maddr + name);
- len = dtrace_strlen(s, size);
-
- if (*flags & CPU_DTRACE_FAULT)
- break;
-
- if (len != 0) {
- if ((end -= (len + 1)) < start)
- break;
-
- *end = ':';
- }
-
- for (i = 1; i <= len; i++)
- end[i] = dtrace_load8((uintptr_t)s++);
- break;
- }
- }
-
- while (daddr != NULL && !(*flags & CPU_DTRACE_FAULT)) {
- ddi_node_state_t devi_state;
-
- devi_state = dtrace_load32(daddr +
- offsetof(struct dev_info, devi_node_state));
-
- if (*flags & CPU_DTRACE_FAULT)
- break;
-
- if (devi_state >= DS_INITIALIZED) {
- s = (char *)dtrace_loadptr(daddr +
- offsetof(struct dev_info, devi_addr));
- len = dtrace_strlen(s, size);
-
- if (*flags & CPU_DTRACE_FAULT)
- break;
-
- if (len != 0) {
- if ((end -= (len + 1)) < start)
- break;
-
- *end = '@';
- }
-
- for (i = 1; i <= len; i++)
- end[i] = dtrace_load8((uintptr_t)s++);
- }
-
- /*
- * Now for the node name...
- */
- s = (char *)dtrace_loadptr(daddr +
- offsetof(struct dev_info, devi_node_name));
-
- daddr = dtrace_loadptr(daddr +
- offsetof(struct dev_info, devi_parent));
-
- /*
- * If our parent is NULL (that is, if we're the root
- * node), we're going to use the special path
- * "devices".
- */
- if (daddr == NULL)
- s = "devices";
-
- len = dtrace_strlen(s, size);
- if (*flags & CPU_DTRACE_FAULT)
- break;
-
- if ((end -= (len + 1)) < start)
- break;
-
- for (i = 1; i <= len; i++)
- end[i] = dtrace_load8((uintptr_t)s++);
- *end = '/';
-
- if (depth++ > dtrace_devdepth_max) {
- *flags |= CPU_DTRACE_ILLOP;
- break;
- }
- }
-
- if (end < start)
- DTRACE_CPUFLAG_SET(CPU_DTRACE_NOSCRATCH);
-
- if (daddr == NULL) {
- regs[rd] = (uintptr_t)end;
- mstate->dtms_scratch_ptr += size;
- }
-
- break;
- }
-#else
- case DIF_SUBR_DDI_PATHNAME: {
- /* FIXME: awaits galactic disentanglement ;-} */
- DTRACE_CPUFLAG_SET(CPU_DTRACE_ILLOP);
- regs[rd] = NULL;
- break;
- }
-#endif /* __APPLE__ */
-
- case DIF_SUBR_STRJOIN: {
- char *d = (char *)mstate->dtms_scratch_ptr;
- uint64_t size = state->dts_options[DTRACEOPT_STRSIZE];
- uintptr_t s1 = tupregs[0].dttk_value;
- uintptr_t s2 = tupregs[1].dttk_value;
-#if !defined(__APPLE__) /* Quiet compiler warnings */
- int i = 0;
-#else
- uint64_t i = 0;
-#endif /* __APPLE__ */
-
- if (!dtrace_strcanload(s1, size, mstate, vstate) ||
- !dtrace_strcanload(s2, size, mstate, vstate)) {
- regs[rd] = NULL;
- break;
- }
-
- if (!DTRACE_INSCRATCH(mstate, size)) {
- DTRACE_CPUFLAG_SET(CPU_DTRACE_NOSCRATCH);
- regs[rd] = NULL;
- break;
- }
-
- for (;;) {
- if (i >= size) {
- DTRACE_CPUFLAG_SET(CPU_DTRACE_NOSCRATCH);
- regs[rd] = NULL;
- break;
- }
-
- if ((d[i++] = dtrace_load8(s1++)) == '\0') {
- i--;
- break;
- }
- }
-
- for (;;) {
- if (i >= size) {
- DTRACE_CPUFLAG_SET(CPU_DTRACE_NOSCRATCH);
- regs[rd] = NULL;
- break;
- }
-
- if ((d[i++] = dtrace_load8(s2++)) == '\0')
- break;
- }
-
- if (i < size) {
- mstate->dtms_scratch_ptr += i;
- regs[rd] = (uintptr_t)d;
- }
-
- break;
- }
-
- case DIF_SUBR_LLTOSTR: {
- int64_t i = (int64_t)tupregs[0].dttk_value;
- int64_t val = i < 0 ? i * -1 : i;
- uint64_t size = 22; /* enough room for 2^64 in decimal */
- char *end = (char *)mstate->dtms_scratch_ptr + size - 1;
-
- if (!DTRACE_INSCRATCH(mstate, size)) {
- DTRACE_CPUFLAG_SET(CPU_DTRACE_NOSCRATCH);
- regs[rd] = NULL;
- break;
- }
-
- for (*end-- = '\0'; val; val /= 10)
- *end-- = '0' + (val % 10);
-
- if (i == 0)
- *end-- = '0';
-
- if (i < 0)
- *end-- = '-';
-
- regs[rd] = (uintptr_t)end + 1;
- mstate->dtms_scratch_ptr += size;
- break;
- }
+ regs[rd] = (uintptr_t)end + 1;
+ mstate->dtms_scratch_ptr += size;
+ break;
+ }
case DIF_SUBR_HTONS:
case DIF_SUBR_NTOHS:
int start, end;
if (!dtrace_canload(src, len + 1, mstate, vstate)) {
- regs[rd] = NULL;
+ regs[rd] = 0;
break;
}
if (!DTRACE_INSCRATCH(mstate, size)) {
DTRACE_CPUFLAG_SET(CPU_DTRACE_NOSCRATCH);
- regs[rd] = NULL;
+ regs[rd] = 0;
break;
}
end = lastbase;
}
-#if !defined(__APPLE__) /* Quiet compiler warnings */
- for (i = start, j = 0; i <= end && j < size - 1; i++, j++)
- dest[j] = dtrace_load8(src + i);
-#else
for (i = start, j = 0; i <= end && (uint64_t)j < size - 1; i++, j++)
dest[j] = dtrace_load8(src + i);
-#endif /* __APPLE__ */
dest[j] = '\0';
regs[rd] = (uintptr_t)dest;
char *dest = (char *)mstate->dtms_scratch_ptr, c;
uint64_t size = state->dts_options[DTRACEOPT_STRSIZE];
uintptr_t src = tupregs[0].dttk_value;
- int i = 0, j = 0;
+ size_t lim;
+ size_t i = 0, j = 0;
- if (!dtrace_strcanload(src, size, mstate, vstate)) {
- regs[rd] = NULL;
+ if (!dtrace_strcanload(src, size, &lim, mstate, vstate)) {
+ regs[rd] = 0;
break;
}
if (!DTRACE_INSCRATCH(mstate, size)) {
DTRACE_CPUFLAG_SET(CPU_DTRACE_NOSCRATCH);
- regs[rd] = NULL;
+ regs[rd] = 0;
break;
}
* Move forward, loading each character.
*/
do {
- c = dtrace_load8(src + i++);
+ c = (i >= lim) ? '\0' : dtrace_load8(src + i++);
next:
-#if !defined(__APPLE__) /* Quiet compiler warnings */
- if (j + 5 >= size) /* 5 = strlen("/..c\0") */
- break;
-#else
if ((uint64_t)(j + 5) >= size) /* 5 = strlen("/..c\0") */
break;
-#endif /* __APPLE__ */
if (c != '/') {
dest[j++] = c;
continue;
}
- c = dtrace_load8(src + i++);
+ c = (i >= lim) ? '\0' : dtrace_load8(src + i++);
if (c == '/') {
/*
continue;
}
- c = dtrace_load8(src + i++);
+ c = (i >= lim) ? '\0' : dtrace_load8(src + i++);
if (c == '/') {
/*
continue;
}
- c = dtrace_load8(src + i++);
+ c = (i >= lim) ? '\0' : dtrace_load8(src + i++);
if (c != '/' && c != '\0') {
/*
#if !defined(__APPLE__)
ip4 = dtrace_load32(tupregs[argi].dttk_value);
#else
+ if (!dtrace_canload(tupregs[argi].dttk_value, sizeof(ip4),
+ mstate, vstate)) {
+ regs[rd] = 0;
+ break;
+ }
+
dtrace_bcopy(
(void *)(uintptr_t)tupregs[argi].dttk_value,
(void *)(uintptr_t)&ip4, sizeof (ip4));
#endif /* __APPLE__ */
if (!DTRACE_INSCRATCH(mstate, size)) {
DTRACE_CPUFLAG_SET(CPU_DTRACE_NOSCRATCH);
- regs[rd] = NULL;
+ regs[rd] = 0;
break;
}
base = (char *)mstate->dtms_scratch_ptr;
* just the IPv4 string is returned for inet_ntoa6.
*/
+ if (!dtrace_canload(tupregs[argi].dttk_value,
+ sizeof(struct in6_addr), mstate, vstate)) {
+ regs[rd] = 0;
+ break;
+ }
+
/*
* Safely load the IPv6 address.
*/
size = INET6_ADDRSTRLEN;
if (!DTRACE_INSCRATCH(mstate, size)) {
DTRACE_CPUFLAG_SET(CPU_DTRACE_NOSCRATCH);
- regs[rd] = NULL;
+ regs[rd] = 0;
break;
}
base = (char *)mstate->dtms_scratch_ptr;
firstzero = -1;
tryzero = -1;
numzero = 1;
-#if !defined(__APPLE__) /* Quiet compiler warnings */
- for (i = 0; i < sizeof (struct in6_addr); i++) {
-#else
for (i = 0; i < (int)sizeof (struct in6_addr); i++) {
-#endif /* __APPLE__ */
if (ip6._S6_un._S6_u8[i] == 0 &&
tryzero == -1 && i % 2 == 0) {
tryzero = i;
numzero += 2;
}
}
-#if !defined(__APPLE__) /* Quiet compiler warnings */
- ASSERT(firstzero + numzero <= sizeof (struct in6_addr));
-#else
ASSERT(firstzero + numzero <= (int)sizeof (struct in6_addr));
-#endif /* __APPLE__ */
/*
* Check for an IPv4 embedded address.
v6end = sizeof (struct in6_addr) - 2;
if (IN6_IS_ADDR_V4MAPPED(&ip6) ||
IN6_IS_ADDR_V4COMPAT(&ip6)) {
-#if !defined(__APPLE__) /* Quiet compiler warnings */
- for (i = sizeof (struct in6_addr) - 1;
- i >= DTRACE_V4MAPPED_OFFSET; i--) {
-#else
for (i = sizeof (struct in6_addr) - 1;
i >= (int)DTRACE_V4MAPPED_OFFSET; i--) {
-#endif /* __APPLE__ */
ASSERT(end >= base);
val = ip6._S6_un._S6_u8[i];
}
}
-#if !defined(__APPLE__) /* Quiet compiler warnings */
- if (i > DTRACE_V4MAPPED_OFFSET)
- *end-- = '.';
-#else
if (i > (int)DTRACE_V4MAPPED_OFFSET)
*end-- = '.';
-#endif /* __APPLE__ */
}
if (subr == DIF_SUBR_INET_NTOA6)
* The user didn't use AH_INET or AH_INET6.
*/
DTRACE_CPUFLAG_SET(CPU_DTRACE_ILLOP);
- regs[rd] = NULL;
+ regs[rd] = 0;
break;
}
mstate->dtms_scratch_ptr += size;
break;
}
-
-#ifdef __APPLE__
- /* CoreProfile callback ('core_profile(uint64_t, [uint64_t], [uint64_t] ...)') */
- case DIF_SUBR_COREPROFILE: {
- uint64_t selector = tupregs[0].dttk_value;
- uint64_t args[DIF_DTR_NREGS-1] = {0ULL};
- uint32_t ii;
- uint32_t count = (uint32_t)nargs;
+ case DIF_SUBR_TOUPPER:
+ case DIF_SUBR_TOLOWER: {
+ uintptr_t src = tupregs[0].dttk_value;
+ char *dest = (char *)mstate->dtms_scratch_ptr;
+ char lower, upper, base, c;
+ uint64_t size = state->dts_options[DTRACEOPT_STRSIZE];
+ size_t len = dtrace_strlen((char*) src, size);
+ size_t i = 0;
+
+ lower = (subr == DIF_SUBR_TOUPPER) ? 'a' : 'A';
+ upper = (subr == DIF_SUBR_TOUPPER) ? 'z' : 'Z';
+ base = (subr == DIF_SUBR_TOUPPER) ? 'A' : 'a';
- if (count < 1) {
- regs[rd] = KERN_FAILURE;
- break;
+ if (!dtrace_canload(src, len + 1, mstate, vstate)) {
+ regs[rd] = 0;
+ break;
}
-
- if(count > DIF_DTR_NREGS)
- count = DIF_DTR_NREGS;
- /* copy in any variadic argument list, bounded by DIF_DTR_NREGS */
- for(ii = 0; ii < count-1; ii++) {
- args[ii] = tupregs[ii+1].dttk_value;
+ if (!DTRACE_INSCRATCH(mstate, size)) {
+ DTRACE_CPUFLAG_SET(CPU_DTRACE_NOSCRATCH);
+ regs[rd] = 0;
+ break;
}
- kern_return_t ret =
- chudxnu_dtrace_callback(selector, args, count-1);
- if(KERN_SUCCESS != ret) {
- /* error */
+ for (i = 0; i < size - 1; ++i) {
+ if ((c = dtrace_load8(src + i)) == '\0')
+ break;
+ if (c >= lower && c <= upper)
+ c = base + (c - lower);
+ dest[i] = c;
}
- regs[rd] = ret;
+ ASSERT(i < size);
+
+ dest[i] = '\0';
+ regs[rd] = (uintptr_t) dest;
+ mstate->dtms_scratch_ptr += size;
+
break;
}
-#endif /* __APPLE__ */
+#if defined(__APPLE__)
+ case DIF_SUBR_VM_KERNEL_ADDRPERM: {
+ if (!dtrace_priv_kernel(state)) {
+ regs[rd] = 0;
+ } else {
+ regs[rd] = VM_KERNEL_ADDRPERM((vm_offset_t) tupregs[0].dttk_value);
+ }
+
+ break;
+ }
+
+ case DIF_SUBR_KDEBUG_TRACE: {
+ uint32_t debugid;
+ uintptr_t args[4] = {0};
+ int i;
+
+ if (nargs < 2 || nargs > 5) {
+ DTRACE_CPUFLAG_SET(CPU_DTRACE_ILLOP);
+ break;
+ }
+
+ if (dtrace_destructive_disallow)
+ return;
+
+ debugid = tupregs[0].dttk_value;
+ for (i = 0; i < nargs - 1; i++)
+ args[i] = tupregs[i + 1].dttk_value;
+
+ kernel_debug(debugid, args[0], args[1], args[2], args[3], 0);
+
+ break;
+ }
+
+ case DIF_SUBR_KDEBUG_TRACE_STRING: {
+ if (nargs != 3) {
+ break;
+ }
+
+ if (dtrace_destructive_disallow)
+ return;
+
+ uint64_t size = state->dts_options[DTRACEOPT_STRSIZE];
+ uint32_t debugid = tupregs[0].dttk_value;
+ uint64_t str_id = tupregs[1].dttk_value;
+ uintptr_t src = tupregs[2].dttk_value;
+ size_t lim;
+ char buf[size];
+ char* str = NULL;
+
+ if (src != (uintptr_t)0) {
+ str = buf;
+ if (!dtrace_strcanload(src, size, &lim, mstate, vstate)) {
+ break;
+ }
+ dtrace_strcpy((void*)src, buf, size);
+ }
+
+ (void)kernel_debug_string(debugid, &str_id, str);
+ regs[rd] = str_id;
+
+ break;
+ }
+#endif
}
}
dtrace_dstate_t *dstate = &vstate->dtvs_dynvars;
dtrace_difv_t *v;
volatile uint16_t *flags = &cpu_core[CPU->cpu_id].cpuc_dtrace_flags;
-#if !defined(__APPLE__)
- volatile uintptr_t *illval = &cpu_core[CPU->cpu_id].cpuc_dtrace_illval;
-#else
volatile uint64_t *illval = &cpu_core[CPU->cpu_id].cpuc_dtrace_illval;
-#endif /* __APPLE__ */
dtrace_key_t tupregs[DIF_DTR_NREGS + 2]; /* +2 for thread and id */
uint64_t regs[DIF_DIR_NREGS];
uint8_t cc_n = 0, cc_z = 0, cc_v = 0, cc_c = 0;
int64_t cc_r;
-#if !defined(__APPLE__) /* Quiet compiler warnings */
- uint_t pc = 0, id, opc;
-#else
uint_t pc = 0, id, opc = 0;
-#endif /* __APPLE__ */
uint8_t ttop = 0;
dif_instr_t instr;
uint_t r1, r2, rd;
case DIF_OP_LDX:
regs[rd] = dtrace_load64(regs[r1]);
break;
-#if !defined(__APPLE__)
- case DIF_OP_ULDSB:
- regs[rd] = (int8_t)
- dtrace_fuword8((void *)(uintptr_t)regs[r1]);
- break;
- case DIF_OP_ULDSH:
- regs[rd] = (int16_t)
- dtrace_fuword16((void *)(uintptr_t)regs[r1]);
- break;
- case DIF_OP_ULDSW:
- regs[rd] = (int32_t)
- dtrace_fuword32((void *)(uintptr_t)regs[r1]);
- break;
- case DIF_OP_ULDUB:
- regs[rd] =
- dtrace_fuword8((void *)(uintptr_t)regs[r1]);
- break;
- case DIF_OP_ULDUH:
- regs[rd] =
- dtrace_fuword16((void *)(uintptr_t)regs[r1]);
- break;
- case DIF_OP_ULDUW:
- regs[rd] =
- dtrace_fuword32((void *)(uintptr_t)regs[r1]);
- break;
- case DIF_OP_ULDX:
- regs[rd] =
- dtrace_fuword64((void *)(uintptr_t)regs[r1]);
- break;
-#else /* Darwin 32-bit kernel may fetch from 64-bit user. Don't want uintptr_t cast. */
+/*
+ * Darwin 32-bit kernel may fetch from 64-bit user.
+ * Do not cast regs to uintptr_t
+ * DIF_OP_ULDSB,DIF_OP_ULDSH, DIF_OP_ULDSW, DIF_OP_ULDUB
+ * DIF_OP_ULDUH, DIF_OP_ULDUW, DIF_OP_ULDX
+ */
case DIF_OP_ULDSB:
regs[rd] = (int8_t)
dtrace_fuword8(regs[r1]);
case DIF_OP_ULDX:
regs[rd] =
dtrace_fuword64(regs[r1]);
-#endif /* __APPLE__ */
break;
case DIF_OP_RET:
rval = regs[rd];
size_t sz = state->dts_options[DTRACEOPT_STRSIZE];
uintptr_t s1 = regs[r1];
uintptr_t s2 = regs[r2];
+ size_t lim1 = sz, lim2 = sz;
- if (s1 != NULL &&
- !dtrace_strcanload(s1, sz, mstate, vstate))
+ if (s1 != 0 &&
+ !dtrace_strcanload(s1, sz, &lim1, mstate, vstate))
break;
- if (s2 != NULL &&
- !dtrace_strcanload(s2, sz, mstate, vstate))
+ if (s2 != 0 &&
+ !dtrace_strcanload(s2, sz, &lim2, mstate, vstate))
break;
- cc_r = dtrace_strncmp((char *)s1, (char *)s2, sz);
+ cc_r = dtrace_strncmp((char *)s1, (char *)s2,
+ MIN(lim1, lim2));
cc_n = cc_r < 0;
cc_z = cc_r == 0;
* then this is to be treated as a
* reference to a NULL variable.
*/
- regs[rd] = NULL;
+ regs[rd] = 0;
} else {
regs[rd] = a + sizeof (uint64_t);
}
ASSERT(id >= DIF_VAR_OTHER_UBASE);
id -= DIF_VAR_OTHER_UBASE;
+ VERIFY(id < (uint_t)vstate->dtvs_nglobals);
svar = vstate->dtvs_globals[id];
ASSERT(svar != NULL);
v = &svar->dtsv_var;
if (v->dtdv_type.dtdt_flags & DIF_TF_BYREF) {
uintptr_t a = (uintptr_t)svar->dtsv_data;
+ size_t lim;
- ASSERT(a != NULL);
+ ASSERT(a != 0);
ASSERT(svar->dtsv_size != 0);
- if (regs[rd] == NULL) {
+ if (regs[rd] == 0) {
*(uint8_t *)a = UINT8_MAX;
break;
} else {
}
if (!dtrace_vcanload(
(void *)(uintptr_t)regs[rd], &v->dtdv_type,
- mstate, vstate))
+ &lim, mstate, vstate))
break;
dtrace_vcopy((void *)(uintptr_t)regs[rd],
- (void *)a, &v->dtdv_type);
+ (void *)a, &v->dtdv_type, lim);
break;
}
id -= DIF_VAR_OTHER_UBASE;
-#if !defined(__APPLE__) /* Quiet compiler warnings */
- ASSERT(id < vstate->dtvs_nlocals);
-#else
ASSERT(id < (uint_t)vstate->dtvs_nlocals);
-#endif /* __APPLE__ */
ASSERT(vstate->dtvs_locals != NULL);
-
svar = vstate->dtvs_locals[id];
ASSERT(svar != NULL);
v = &svar->dtsv_var;
* then this is to be treated as a
* reference to a NULL variable.
*/
- regs[rd] = NULL;
+ regs[rd] = 0;
} else {
regs[rd] = a + sizeof (uint64_t);
}
ASSERT(id >= DIF_VAR_OTHER_UBASE);
id -= DIF_VAR_OTHER_UBASE;
-#if !defined(__APPLE__) /* Quiet compiler warnings */
- ASSERT(id < vstate->dtvs_nlocals);
-#else
- ASSERT(id < (uint_t)vstate->dtvs_nlocals);
-#endif /* __APPLE__ */
-
+ VERIFY(id < (uint_t)vstate->dtvs_nlocals);
ASSERT(vstate->dtvs_locals != NULL);
svar = vstate->dtvs_locals[id];
ASSERT(svar != NULL);
if (v->dtdv_type.dtdt_flags & DIF_TF_BYREF) {
uintptr_t a = (uintptr_t)svar->dtsv_data;
size_t sz = v->dtdv_type.dtdt_size;
+ size_t lim;
sz += sizeof (uint64_t);
ASSERT(svar->dtsv_size == (int)NCPU * sz);
a += CPU->cpu_id * sz;
- if (regs[rd] == NULL) {
+ if (regs[rd] == 0) {
*(uint8_t *)a = UINT8_MAX;
break;
} else {
if (!dtrace_vcanload(
(void *)(uintptr_t)regs[rd], &v->dtdv_type,
- mstate, vstate))
+ &lim, mstate, vstate))
break;
dtrace_vcopy((void *)(uintptr_t)regs[rd],
- (void *)a, &v->dtdv_type);
+ (void *)a, &v->dtdv_type, lim);
break;
}
id = DIF_INSTR_VAR(instr);
ASSERT(id >= DIF_VAR_OTHER_UBASE);
id -= DIF_VAR_OTHER_UBASE;
+ VERIFY(id < (uint_t)vstate->dtvs_ntlocals);
key = &tupregs[DIF_DTR_NREGS];
key[0].dttk_value = (uint64_t)id;
* Given that we're storing to thread-local data,
* we need to flush our predicate cache.
*/
-#if !defined(__APPLE__)
- curthread->t_predcache = NULL;
-#else
dtrace_set_thread_predcache(current_thread(), 0);
-#endif /* __APPLE__ */
if (dvar == NULL)
break;
if (v->dtdv_type.dtdt_flags & DIF_TF_BYREF) {
+ size_t lim;
+
if (!dtrace_vcanload(
(void *)(uintptr_t)regs[rd],
- &v->dtdv_type, mstate, vstate))
+ &v->dtdv_type, &lim, mstate, vstate))
break;
dtrace_vcopy((void *)(uintptr_t)regs[rd],
- dvar->dtdv_data, &v->dtdv_type);
+ dvar->dtdv_data, &v->dtdv_type, lim);
} else {
*((uint64_t *)dvar->dtdv_data) = regs[rd];
}
regs[r2] ? regs[r2] :
dtrace_strsize_default) + 1;
} else {
+ if (regs[r2] > LONG_MAX) {
+ *flags |= CPU_DTRACE_ILLOP;
+ break;
+ }
tupregs[ttop].dttk_size = regs[r2];
}
if (DIF_INSTR_OP(instr) == DIF_OP_LDTAA) {
DTRACE_TLS_THRKEY(key[nkeys].dttk_value);
key[nkeys++].dttk_size = 0;
+ VERIFY(id < (uint_t)vstate->dtvs_ntlocals);
v = &vstate->dtvs_tlocals[id];
} else {
+ VERIFY(id < (uint_t)vstate->dtvs_nglobals);
v = &vstate->dtvs_globals[id]->dtsv_var;
}
if (DIF_INSTR_OP(instr) == DIF_OP_STTAA) {
DTRACE_TLS_THRKEY(key[nkeys].dttk_value);
key[nkeys++].dttk_size = 0;
+ VERIFY(id < (uint_t)vstate->dtvs_ntlocals);
v = &vstate->dtvs_tlocals[id];
} else {
+ VERIFY(id < (uint_t)vstate->dtvs_nglobals);
v = &vstate->dtvs_globals[id]->dtsv_var;
}
break;
if (v->dtdv_type.dtdt_flags & DIF_TF_BYREF) {
+ size_t lim;
+
if (!dtrace_vcanload(
(void *)(uintptr_t)regs[rd], &v->dtdv_type,
- mstate, vstate))
+ &lim, mstate, vstate))
break;
dtrace_vcopy((void *)(uintptr_t)regs[rd],
- dvar->dtdv_data, &v->dtdv_type);
+ dvar->dtdv_data, &v->dtdv_type, lim);
} else {
*((uint64_t *)dvar->dtdv_data) = regs[rd];
}
if (size < regs[r1] ||
!DTRACE_INSCRATCH(mstate, size)) {
DTRACE_CPUFLAG_SET(CPU_DTRACE_NOSCRATCH);
- regs[rd] = NULL;
+ regs[rd] = 0;
break;
}
*illval = regs[rd];
break;
}
-#if !defined(__APPLE__)
- if (regs[rd] & 7) {
-#else
- if (regs[rd] & 3) { /* Darwin kmem_zalloc() called from dtrace_difo_init() is 4-byte aligned. */
-#endif /* __APPLE__ */
+
+ /*
+ * Darwin kmem_zalloc() called from
+ * dtrace_difo_init() is 4-byte aligned.
+ */
+ if (regs[rd] & 3) {
*flags |= CPU_DTRACE_BADALIGN;
*illval = regs[rd];
break;
dtrace_probe_t *probe = ecb->dte_probe;
dtrace_provider_t *prov = probe->dtpr_provider;
char c[DTRACE_FULLNAMELEN + 80], *str;
-#if !defined(__APPLE__) /* Quiet compiler warnings */
- char *msg = "dtrace: breakpoint action at probe ";
- char *ecbmsg = " (ecb ";
-#else
const char *msg = "dtrace: breakpoint action at probe ";
const char *ecbmsg = " (ecb ";
-#endif /* __APPLE__ */
uintptr_t mask = (0xf << (sizeof (uintptr_t) * NBBY / 4));
uintptr_t val = (uintptr_t)ecb;
int shift = (sizeof (uintptr_t) * NBBY) - 4, i = 0;
if (dtrace_panicked != NULL)
return;
-#if !defined(__APPLE__)
- if (dtrace_casptr(&dtrace_panicked, NULL, curthread) != NULL)
- return;
-#else
if (dtrace_casptr(&dtrace_panicked, NULL, current_thread()) != NULL)
return;
-#endif /* __APPLE__ */
/*
* We won the right to panic. (We want to be sure that only one
probe->dtpr_provider->dtpv_name, probe->dtpr_mod,
probe->dtpr_func, probe->dtpr_name, (void *)ecb);
-#if defined(__APPLE__)
- /* Mac OS X debug feature -- can return from panic() */
+ /*
+ * APPLE NOTE: this was for an old Mac OS X debug feature
+ * allowing a return from panic(). Revisit someday.
+ */
dtrace_panicked = NULL;
-#endif /* __APPLE__ */
}
static void
return;
}
-#if !defined(__APPLE__)
/*
* raise() has a queue depth of 1 -- we ignore all subsequent
* invocations of the raise() action.
*/
- if (curthread->t_dtrace_sig == 0)
- curthread->t_dtrace_sig = (uint8_t)sig;
- curthread->t_sig_check = 1;
- aston(curthread);
-#else
uthread_t uthread = (uthread_t)get_bsdthread_info(current_thread());
if (uthread && uthread->t_dtrace_sig == 0) {
uthread->t_dtrace_sig = sig;
act_set_astbsd(current_thread());
}
-#endif /* __APPLE__ */
}
static void
if (dtrace_destructive_disallow)
return;
-#if !defined(__APPLE__)
- if (!curthread->t_dtrace_stop) {
- curthread->t_dtrace_stop = 1;
- curthread->t_sig_check = 1;
- aston(curthread);
- }
-#else
uthread_t uthread = (uthread_t)get_bsdthread_info(current_thread());
if (uthread) {
/*
uthread->t_dtrace_stop = 1;
act_set_astbsd(current_thread());
}
-#endif /* __APPLE__ */
}
-#if defined(__APPLE__)
+
+/*
+ * APPLE NOTE: pidresume works in conjunction with the dtrace stop action.
+ * Both activate only when the currently running process next leaves the
+ * kernel.
+ */
static void
dtrace_action_pidresume(uint64_t pid)
{
act_set_astbsd(current_thread());
}
}
-#endif /* __APPLE__ */
-
static void
dtrace_action_chill(dtrace_mstate_t *mstate, hrtime_t val)
size = (uintptr_t)fps - mstate->dtms_scratch_ptr +
(nframes * sizeof (uint64_t));
-#if !defined(__APPLE__) /* Quiet compiler warnings */
- if (!DTRACE_INSCRATCH(mstate, size)) {
-#else
if (!DTRACE_INSCRATCH(mstate, (uintptr_t)size)) {
-#endif /* __APPLE__ */
/*
* Not enough room for our frame pointers -- need to indicate
* that we ran out of scratch space.
mstate->dtms_scratch_ptr = old;
}
+static void
+dtrace_store_by_ref(dtrace_difo_t *dp, caddr_t tomax, size_t size,
+ size_t *valoffsp, uint64_t *valp, uint64_t end, int intuple, int dtkind)
+{
+ volatile uint16_t *flags;
+ uint64_t val = *valp;
+ size_t valoffs = *valoffsp;
+
+ flags = (volatile uint16_t *)&cpu_core[CPU->cpu_id].cpuc_dtrace_flags;
+ ASSERT(dtkind == DIF_TF_BYREF || dtkind == DIF_TF_BYUREF);
+
+ /*
+ * If this is a string, we're going to only load until we find the zero
+ * byte -- after which we'll store zero bytes.
+ */
+ if (dp->dtdo_rtype.dtdt_kind == DIF_TYPE_STRING) {
+ char c = '\0' + 1;
+ size_t s;
+
+ for (s = 0; s < size; s++) {
+ if (c != '\0' && dtkind == DIF_TF_BYREF) {
+ c = dtrace_load8(val++);
+ } else if (c != '\0' && dtkind == DIF_TF_BYUREF) {
+ DTRACE_CPUFLAG_SET(CPU_DTRACE_NOFAULT);
+ c = dtrace_fuword8((user_addr_t)(uintptr_t)val++);
+ DTRACE_CPUFLAG_CLEAR(CPU_DTRACE_NOFAULT);
+ if (*flags & CPU_DTRACE_FAULT)
+ break;
+ }
+
+ DTRACE_STORE(uint8_t, tomax, valoffs++, c);
+
+ if (c == '\0' && intuple)
+ break;
+ }
+ } else {
+ uint8_t c;
+ while (valoffs < end) {
+ if (dtkind == DIF_TF_BYREF) {
+ c = dtrace_load8(val++);
+ } else if (dtkind == DIF_TF_BYUREF) {
+ DTRACE_CPUFLAG_SET(CPU_DTRACE_NOFAULT);
+ c = dtrace_fuword8((user_addr_t)(uintptr_t)val++);
+ DTRACE_CPUFLAG_CLEAR(CPU_DTRACE_NOFAULT);
+ if (*flags & CPU_DTRACE_FAULT)
+ break;
+ }
+
+ DTRACE_STORE(uint8_t, tomax,
+ valoffs++, c);
+ }
+ }
+
+ *valp = val;
+ *valoffsp = valoffs;
+}
+
/*
* If you're looking for the epicenter of DTrace, you just found it. This
* is the function called by the provider to fire a probe -- from which all
* subsequent probe-context DTrace activity emanates.
*/
-#if !defined(__APPLE__)
-void
-dtrace_probe(dtrace_id_t id, uintptr_t arg0, uintptr_t arg1,
- uintptr_t arg2, uintptr_t arg3, uintptr_t arg4)
-#else
static void
__dtrace_probe(dtrace_id_t id, uint64_t arg0, uint64_t arg1,
uint64_t arg2, uint64_t arg3, uint64_t arg4)
-#endif /* __APPLE__ */
{
processorid_t cpuid;
dtrace_icookie_t cookie;
volatile uint16_t *flags;
hrtime_t now;
-#if !defined(__APPLE__)
- /*
- * Kick out immediately if this CPU is still being born (in which case
- * curthread will be set to -1) or the current thread can't allow
- * probes in its current context.
- */
- if (((uintptr_t)curthread & 1) || (curthread->t_flag & T_DONTDTRACE))
- return;
-#else
- /* Not a concern for Darwin */
-#endif /* __APPLE__ */
-
cookie = dtrace_interrupt_disable();
probe = dtrace_probes[id - 1];
cpuid = CPU->cpu_id;
onintr = CPU_ON_INTR(CPU);
-#if !defined(__APPLE__)
- if (!onintr && probe->dtpr_predcache != DTRACE_CACHEIDNONE &&
- probe->dtpr_predcache == curthread->t_predcache) {
-#else
if (!onintr && probe->dtpr_predcache != DTRACE_CACHEIDNONE &&
probe->dtpr_predcache == dtrace_get_thread_predcache(current_thread())) {
-#endif /* __APPLE__ */
/*
* We have hit in the predicate cache; we know that
* this predicate would evaluate to be false.
if (vtime && curthread->t_dtrace_start)
curthread->t_dtrace_vtime += now - curthread->t_dtrace_start;
#else
- /* FIXME: the time spent entering DTrace and arriving to this point is attributed
- to the current thread. Instead it should accrue to DTrace. */
+ /*
+ * APPLE NOTE: The time spent entering DTrace and arriving
+ * to this point, is attributed to the current thread.
+ * Instead it should accrue to DTrace. FIXME
+ */
vtime = dtrace_vtime_references != 0;
if (vtime)
now = dtrace_gethrtime(); /* must not precede dtrace_calc_thread_recent_vtime() call! */
#endif /* __APPLE__ */
-#if defined(__APPLE__)
/*
- * A provider may call dtrace_probe_error() in lieu of dtrace_probe() in some circumstances.
- * See, e.g. fasttrap_isa.c. However the provider has no access to ECB context, so passes
- * 0 through "arg0" and the probe_id of the overridden probe as arg1. Detect that here
- * and cons up a viable state (from the probe_id).
+ * APPLE NOTE: A provider may call dtrace_probe_error() in lieu of
+ * dtrace_probe() in some circumstances. See, e.g. fasttrap_isa.c.
+ * However the provider has no access to ECB context, so passes
+ * 0 through "arg0" and the probe_id of the overridden probe as arg1.
+ * Detect that here and cons up a viable state (from the probe_id).
*/
if (dtrace_probeid_error == id && 0 == arg0) {
dtrace_id_t ftp_id = (dtrace_id_t)arg1;
ftp_state->dts_arg_error_illval = -1; /* arg5 */
}
}
-#endif /* __APPLE__ */
mstate.dtms_difo = NULL;
mstate.dtms_probe = probe;
- mstate.dtms_strtok = NULL;
+ mstate.dtms_strtok = 0;
mstate.dtms_arg[0] = arg0;
mstate.dtms_arg[1] = arg1;
mstate.dtms_arg[2] = arg2;
dtrace_buffer_t *aggbuf = &state->dts_aggbuffer[cpuid];
dtrace_vstate_t *vstate = &state->dts_vstate;
dtrace_provider_t *prov = probe->dtpr_provider;
+ uint64_t tracememsize = 0;
int committed = 0;
caddr_t tomax;
* not the case.
*/
if ((ecb->dte_cond & DTRACE_COND_USERMODE) &&
+ prov->dtpv_pops.dtps_usermode &&
prov->dtpv_pops.dtps_usermode(prov->dtpv_arg,
probe->dtpr_id, probe->dtpr_arg) == 0)
continue;
* XXX this is hackish, but so is setting a variable
* XXX in a McCarthy OR...
*/
-#if !defined(__APPLE__)
- if ((cr = CRED()) == NULL ||
-#else
if ((cr = dtrace_CRED()) == NULL ||
-#endif /* __APPLE__ */
posix_cred_get(s_cr)->cr_uid != posix_cred_get(cr)->cr_uid ||
posix_cred_get(s_cr)->cr_uid != posix_cred_get(cr)->cr_ruid ||
posix_cred_get(s_cr)->cr_uid != posix_cred_get(cr)->cr_suid ||
(proc = ttoproc(curthread)) == NULL ||
(proc->p_flag & SNOCD))
#else
- 1) /* Darwin omits "No Core Dump" flag. */
+ 1) /* APPLE NOTE: Darwin omits "No Core Dump" flag */
#endif /* __APPLE__ */
continue;
}
cr->cr_zone->zone_id)
continue;
#else
- /* Darwin doesn't do zones. */
+ /* APPLE NOTE: Darwin doesn't do zones. */
#endif /* __APPLE__ */
}
}
tomax = buf->dtb_tomax;
ASSERT(tomax != NULL);
- if (ecb->dte_size != 0)
- DTRACE_STORE(uint32_t, tomax, offs, ecb->dte_epid);
+ /*
+ * Build and store the record header corresponding to the ECB.
+ */
+ if (ecb->dte_size != 0) {
+ dtrace_rechdr_t dtrh;
+
+ if (!(mstate.dtms_present & DTRACE_MSTATE_TIMESTAMP)) {
+ mstate.dtms_timestamp = dtrace_gethrtime();
+ mstate.dtms_present |= DTRACE_MSTATE_TIMESTAMP;
+ }
+
+ ASSERT(ecb->dte_size >= sizeof(dtrace_rechdr_t));
+
+ dtrh.dtrh_epid = ecb->dte_epid;
+ DTRACE_RECORD_STORE_TIMESTAMP(&dtrh, mstate.dtms_timestamp);
+ DTRACE_STORE(dtrace_rechdr_t, tomax, offs, dtrh);
+ }
mstate.dtms_epid = ecb->dte_epid;
mstate.dtms_present |= DTRACE_MSTATE_EPID;
* Update the predicate cache...
*/
ASSERT(cid == pred->dtp_cacheid);
-#if !defined(__APPLE__)
- curthread->t_predcache = cid;
-#else
+
dtrace_set_thread_predcache(current_thread(), cid);
-#endif /* __APPLE__ */
}
continue;
if (!dtrace_priv_kernel(state))
continue;
-#if !defined(__APPLE__) /* Quiet compiler warnings */
- dtrace_getpcstack((pc_t *)(tomax + valoffs),
- size / sizeof (pc_t), probe->dtpr_aframes,
- DTRACE_ANCHORED(probe) ? NULL :
- (uint32_t *)arg0);
-#else
dtrace_getpcstack((pc_t *)(tomax + valoffs),
size / sizeof (pc_t), probe->dtpr_aframes,
DTRACE_ANCHORED(probe) ? NULL :
(uint32_t *)(uintptr_t)arg0);
-#endif /* __APPLE__ */
-
continue;
case DTRACEACT_JSTACK:
continue;
switch (act->dta_kind) {
- case DTRACEACT_SPECULATE:
+ case DTRACEACT_SPECULATE: {
+ dtrace_rechdr_t *dtrh = NULL;
+
ASSERT(buf == &state->dts_buffer[cpuid]);
buf = dtrace_speculation_buffer(state,
cpuid, val);
tomax = buf->dtb_tomax;
ASSERT(tomax != NULL);
- if (ecb->dte_size != 0)
- DTRACE_STORE(uint32_t, tomax, offs,
- ecb->dte_epid);
- continue;
+ if (ecb->dte_size == 0)
+ continue;
+
+ ASSERT(ecb->dte_size >= sizeof(dtrace_rechdr_t));
+ dtrh = ((void *)(tomax + offs));
+ dtrh->dtrh_epid = ecb->dte_epid;
+
+ /*
+ * When the speculation is committed, all of
+ * the records in the speculative buffer will
+ * have their timestamps set to the commit
+ * time. Until then, it is set to a sentinel
+ * value, for debugability.
+ */
+ DTRACE_RECORD_STORE_TIMESTAMP(dtrh, UINT64_MAX);
+
+ continue;
+ }
case DTRACEACT_CHILL:
if (dtrace_priv_kernel_destructive(state))
dtrace_action_raise(val);
continue;
-#if defined(__APPLE__)
- case DTRACEACT_PIDRESUME:
+ case DTRACEACT_PIDRESUME: /* __APPLE__ */
if (dtrace_priv_proc_destructive(state))
dtrace_action_pidresume(val);
continue;
-#endif /* __APPLE__ */
case DTRACEACT_COMMIT:
ASSERT(!committed);
case DTRACEACT_PRINTA:
case DTRACEACT_SYSTEM:
case DTRACEACT_FREOPEN:
-#if defined(__APPLE__)
- case DTRACEACT_APPLEBINARY:
-#endif /* __APPLE__ */
+ case DTRACEACT_APPLEBINARY: /* __APPLE__ */
+ case DTRACEACT_TRACEMEM:
+ break;
+
+ case DTRACEACT_TRACEMEM_DYNSIZE:
+ tracememsize = val;
break;
case DTRACEACT_SYM:
continue;
break;
-#if !defined(__APPLE__)
- case DTRACEACT_USYM:
- case DTRACEACT_UMOD:
- case DTRACEACT_UADDR: {
- struct pid *pid = curthread->t_procp->p_pidp;
-
- if (!dtrace_priv_proc(state))
- continue;
-
- DTRACE_STORE(uint64_t, tomax,
- valoffs, (uint64_t)pid->pid_id);
- DTRACE_STORE(uint64_t, tomax,
- valoffs + sizeof (uint64_t), val);
-
- continue;
- }
-#else
case DTRACEACT_USYM:
case DTRACEACT_UMOD:
case DTRACEACT_UADDR: {
continue;
}
-#endif /* __APPLE__ */
case DTRACEACT_EXIT: {
/*
ASSERT(0);
}
- if (dp->dtdo_rtype.dtdt_flags & DIF_TF_BYREF) {
+ if (dp->dtdo_rtype.dtdt_flags & (DIF_TF_BYREF | DIF_TF_BYUREF)) {
uintptr_t end = valoffs + size;
- if (!dtrace_vcanload((void *)(uintptr_t)val,
- &dp->dtdo_rtype, &mstate, vstate))
- continue;
-
- /*
- * If this is a string, we're going to only
- * load until we find the zero byte -- after
- * which we'll store zero bytes.
- */
- if (dp->dtdo_rtype.dtdt_kind ==
- DIF_TYPE_STRING) {
- char c = '\0' + 1;
- int intuple = act->dta_intuple;
- size_t s;
-
- for (s = 0; s < size; s++) {
- if (c != '\0')
- c = dtrace_load8(val++);
-
- DTRACE_STORE(uint8_t, tomax,
- valoffs++, c);
-
- if (c == '\0' && intuple)
- break;
- }
-
+ if (tracememsize != 0 &&
+ valoffs + tracememsize < end)
+ {
+ end = valoffs + tracememsize;
+ tracememsize = 0;
+ }
+
+ if (dp->dtdo_rtype.dtdt_flags & DIF_TF_BYREF &&
+ !dtrace_vcanload((void *)(uintptr_t)val,
+ &dp->dtdo_rtype, NULL, &mstate, vstate))
+ {
continue;
}
- while (valoffs < end) {
- DTRACE_STORE(uint8_t, tomax, valoffs++,
- dtrace_load8(val++));
- }
+ dtrace_store_by_ref(dp, tomax, size, &valoffs,
+ &val, end, act->dta_intuple,
+ dp->dtdo_rtype.dtdt_flags & DIF_TF_BYREF ?
+ DIF_TF_BYREF: DIF_TF_BYUREF);
continue;
}
* time to prevent it from being accumulated
* into t_dtrace_vtime.
*/
-#if !defined(__APPLE__)
- curthread->t_dtrace_start = 0;
-#else
- /* Set the sign bit on t_dtrace_tracing to suspend accumulation to it. */
+
+ /*
+ * Darwin sets the sign bit on t_dtrace_tracing
+ * to suspend accumulation to it.
+ */
dtrace_set_thread_tracing(current_thread(),
- (1ULL<<63) | dtrace_get_thread_tracing(current_thread()));
-#endif /* __APPLE__ */
+ (1ULL<<63) | dtrace_get_thread_tracing(current_thread()));
+
}
/*
buf->dtb_offset = offs + ecb->dte_size;
}
-#if !defined(__APPLE__)
- if (vtime)
- curthread->t_dtrace_start = dtrace_gethrtime();
-#else
- /* FIXME: the time spent leaving DTrace from this point to the rti is attributed
+ /* FIXME: On Darwin the time spent leaving DTrace from this point to the rti is attributed
to the current thread. Instead it should accrue to DTrace. */
if (vtime) {
thread_t thread = current_thread();
dtrace_set_thread_tracing(thread, (~(1ULL<<63)) & t);
}
}
-#endif /* __APPLE__ */
dtrace_interrupt_enable(cookie);
}
-#if defined(__APPLE__)
-/* Don't allow a thread to re-enter dtrace_probe(). This could occur if a probe is encountered
- on some function in the transitive closure of the call to dtrace_probe(). Solaris has some
- strong guarantees that this won't happen, the Darwin implementation is not so mature as to
- make those guarantees. */
+/*
+ * APPLE NOTE: Don't allow a thread to re-enter dtrace_probe().
+ * This could occur if a probe is encountered on some function in the
+ * transitive closure of the call to dtrace_probe().
+ * Solaris has some strong guarantees that this won't happen.
+ * The Darwin implementation is not so mature as to make those guarantees.
+ * Hence, the introduction of __dtrace_probe() on xnu.
+ */
void
dtrace_probe(dtrace_id_t id, uint64_t arg0, uint64_t arg1,
#endif
enable_preemption();
}
-#endif /* __APPLE__ */
/*
* DTrace Probe Hashing Functions
* specified.)
*/
static uint_t
-#if !defined(__APPLE__) /* Quiet compiler warnings */
-dtrace_hash_str(char *p)
-#else
dtrace_hash_str(const char *p)
-#endif /* __APPLE__ */
{
unsigned int g;
uint_t hval = 0;
return (hash);
}
-#if !defined(__APPLE__) /* Unused. Quiet compiler warning. */
+/*
+ * APPLE NOTE: dtrace_hash_destroy is not used.
+ * It is called by dtrace_detach which is not
+ * currently implemented. Revisit someday.
+ */
+#if !defined(__APPLE__)
static void
dtrace_hash_destroy(dtrace_hash_t *hash)
{
return (bucket->dthb_len);
}
- return (NULL);
+ return (0);
}
static void
/*
* Return a duplicate copy of a string. If the specified string is NULL,
* this function returns a zero-length string.
+ * APPLE NOTE: Darwin employs size bounded string operation.
*/
-#if !defined(__APPLE__)
-static char *
-dtrace_strdup(const char *str)
-{
- char *new = kmem_zalloc((str != NULL ? strlen(str) : 0) + 1, KM_SLEEP);
-
- if (str != NULL)
- (void) strcpy(new, str);
-
- return (new);
-}
-#else /* Employ size bounded string operation. */
static char *
dtrace_strdup(const char *str)
{
return (new);
}
-#endif /* __APPLE__ */
#define DTRACE_ISALPHA(c) \
(((c) >= 'a' && (c) <= 'z') || ((c) >= 'A' && (c) <= 'Z'))
uint32_t priv;
if (cr == NULL || PRIV_POLICY_ONLY(cr, PRIV_ALL, B_FALSE)) {
- /*
- * For DTRACE_PRIV_ALL, the uid and zoneid don't matter.
- */
- priv = DTRACE_PRIV_ALL;
+ if (dtrace_is_restricted() && !dtrace_are_restrictions_relaxed()) {
+ priv = DTRACE_PRIV_USER | DTRACE_PRIV_PROC;
+ }
+ else {
+ priv = DTRACE_PRIV_ALL;
+ }
} else {
*uidp = crgetuid(cr);
*zoneidp = crgetzoneid(cr);
static void
dtrace_errdebug(const char *str)
{
-#if !defined(__APPLE__) /* Quiet compiler warnings */
- int hval = dtrace_hash_str((char *)str) % DTRACE_ERRHASHSZ;
-#else
int hval = dtrace_hash_str(str) % DTRACE_ERRHASHSZ;
-#endif /* __APPLE__ */
int occupied = 0;
lck_mtx_lock(&dtrace_errlock);
dtrace_errlast = str;
-#if !defined(__APPLE__)
- dtrace_errthread = curthread;
-#else
dtrace_errthread = (kthread_t *)current_thread();
-#endif /* __APPLE__ */
while (occupied++ < DTRACE_ERRHASHSZ) {
if (dtrace_errhash[hval].dter_msg == str) {
dtrace_match_string(const char *s, const char *p, int depth)
{
#pragma unused(depth) /* __APPLE__ */
-#if !defined(__APPLE__)
- return (s != NULL && strcmp(s, p) == 0);
-#else /* Employ size bounded string operation. */
+
+ /* APPLE NOTE: Darwin employs size bounded string operation. */
return (s != NULL && strncmp(s, p, strlen(s) + 1) == 0);
-#endif /* __APPLE__ */
}
/*ARGSUSED*/
static int
dtrace_match(const dtrace_probekey_t *pkp, uint32_t priv, uid_t uid,
- zoneid_t zoneid, int (*matched)(dtrace_probe_t *, void *), void *arg)
+ zoneid_t zoneid, int (*matched)(dtrace_probe_t *, void *, void *), void *arg1, void *arg2)
{
dtrace_probe_t template, *probe;
dtrace_hash_t *hash = NULL;
if (pkp->dtpk_id != DTRACE_IDNONE) {
if ((probe = dtrace_probe_lookup_id(pkp->dtpk_id)) != NULL &&
dtrace_match_probe(probe, pkp, priv, uid, zoneid) > 0) {
- if ((*matched)(probe, arg) == DTRACE_MATCH_FAIL)
+ if ((*matched)(probe, arg1, arg2) == DTRACE_MATCH_FAIL)
return (DTRACE_MATCH_FAIL);
nmatched++;
}
return (nmatched);
}
-#if !defined(__APPLE__) /* Quiet compiler warnings */
- template.dtpr_mod = (char *)pkp->dtpk_mod;
- template.dtpr_func = (char *)pkp->dtpk_func;
- template.dtpr_name = (char *)pkp->dtpk_name;
-#else
template.dtpr_mod = (char *)(uintptr_t)pkp->dtpk_mod;
template.dtpr_func = (char *)(uintptr_t)pkp->dtpk_func;
template.dtpr_name = (char *)(uintptr_t)pkp->dtpk_name;
-#endif /* __APPLE__ */
/*
* We want to find the most distinct of the module name, function
* invoke our callback for each one that matches our input probe key.
*/
if (hash == NULL) {
-#if !defined(__APPLE__) /* Quiet compiler warning */
- for (i = 0; i < dtrace_nprobes; i++) {
-#else
for (i = 0; i < (dtrace_id_t)dtrace_nprobes; i++) {
-#endif /* __APPLE__ */
if ((probe = dtrace_probes[i]) == NULL ||
dtrace_match_probe(probe, pkp, priv, uid,
zoneid) <= 0)
nmatched++;
- if ((rc = (*matched)(probe, arg)) != DTRACE_MATCH_NEXT) {
+ if ((rc = (*matched)(probe, arg1, arg2)) != DTRACE_MATCH_NEXT) {
if (rc == DTRACE_MATCH_FAIL)
return (DTRACE_MATCH_FAIL);
break;
nmatched++;
- if ((rc = (*matched)(probe, arg)) != DTRACE_MATCH_NEXT) {
+ if ((rc = (*matched)(probe, arg1, arg2)) != DTRACE_MATCH_NEXT) {
if (rc == DTRACE_MATCH_FAIL)
return (DTRACE_MATCH_FAIL);
break;
pkp->dtpk_fmatch = &dtrace_match_nonzero;
}
+static int
+dtrace_cond_provider_match(dtrace_probedesc_t *desc, void *data)
+{
+ if (desc == NULL)
+ return 1;
+
+ dtrace_probekey_f *func = dtrace_probekey_func(desc->dtpd_provider);
+
+ return func(desc->dtpd_provider, (char*)data, 0);
+}
+
/*
* DTrace Provider-to-Framework API Functions
*
}
provider = kmem_zalloc(sizeof (dtrace_provider_t), KM_SLEEP);
-#if !defined(__APPLE__)
- provider->dtpv_name = kmem_alloc(strlen(name) + 1, KM_SLEEP);
- (void) strcpy(provider->dtpv_name, name);
-#else /* Employ size bounded string operation. */
+
+ /* APPLE NOTE: Darwin employs size bounded string operation. */
{
size_t bufsize = strlen(name) + 1;
provider->dtpv_name = kmem_alloc(bufsize, KM_SLEEP);
(void) strlcpy(provider->dtpv_name, name, bufsize);
}
-#endif /* __APPLE__ */
provider->dtpv_attr = *pap;
provider->dtpv_priv.dtpp_flags = priv;
dtrace_enabling_provide(provider);
/*
- * Now we need to call dtrace_enabling_matchall() -- which
- * will acquire cpu_lock and dtrace_lock. We therefore need
+ * Now we need to call dtrace_enabling_matchall_with_cond() --
+ * with a condition matching the provider name we just added,
+ * which will acquire cpu_lock and dtrace_lock. We therefore need
* to drop all of our locks before calling into it...
*/
lck_mtx_unlock(&dtrace_lock);
lck_mtx_unlock(&dtrace_provider_lock);
- dtrace_enabling_matchall();
+
+ dtrace_match_cond_t cond = {dtrace_cond_provider_match, provider->dtpv_name};
+ dtrace_enabling_matchall_with_cond(&cond);
return (0);
}
/*
* Attempt to destroy the probes associated with this provider.
*/
- if (old->ecb_count!=0) {
+ if (old->dtpv_ecb_count!=0) {
/*
* We have at least one ECB; we can't remove this provider.
*/
* All of the probes for this provider are disabled; we can safely
* remove all of them from their hash chains and from the probe array.
*/
- for (i = 0; i < dtrace_nprobes && old->probe_count!=0; i++) {
+ for (i = 0; i < dtrace_nprobes && old->dtpv_probe_count!=0; i++) {
if ((probe = dtrace_probes[i]) == NULL)
continue;
continue;
dtrace_probes[i] = NULL;
- old->probe_count--;
+ old->dtpv_probe_count--;
dtrace_hash_remove(dtrace_bymod, probe);
dtrace_hash_remove(dtrace_byfunc, probe);
kmem_free(probe->dtpr_func, strlen(probe->dtpr_func) + 1);
kmem_free(probe->dtpr_name, strlen(probe->dtpr_name) + 1);
vmem_free(dtrace_arena, (void *)(uintptr_t)(probe->dtpr_id), 1);
-#if !defined(__APPLE__)
- kmem_free(probe, sizeof (dtrace_probe_t));
-#else
zfree(dtrace_probe_t_zone, probe);
-#endif
}
if ((prev = dtrace_provider) == old) {
continue;
dtrace_probes[i] = NULL;
- prov->probe_count--;
+ prov->dtpv_probe_count--;
dtrace_hash_remove(dtrace_bymod, probe);
dtrace_hash_remove(dtrace_byfunc, probe);
kmem_free(probe->dtpr_mod, strlen(probe->dtpr_mod) + 1);
kmem_free(probe->dtpr_func, strlen(probe->dtpr_func) + 1);
kmem_free(probe->dtpr_name, strlen(probe->dtpr_name) + 1);
-#if !defined(__APPLE__)
- kmem_free(probe, sizeof (dtrace_probe_t));
-#else
zfree(dtrace_probe_t_zone, probe);
-#endif
vmem_free(dtrace_arena, (void *)((uintptr_t)i + 1), 1);
}
id = (dtrace_id_t)(uintptr_t)vmem_alloc(dtrace_arena, 1,
VM_BESTFIT | VM_SLEEP);
-#if !defined(__APPLE__)
- probe = kmem_zalloc(sizeof (dtrace_probe_t), KM_SLEEP);
-#else
+
probe = zalloc(dtrace_probe_t_zone);
bzero(probe, sizeof (dtrace_probe_t));
-#endif
probe->dtpr_id = id;
probe->dtpr_gen = dtrace_probegen++;
dtrace_hash_add(dtrace_byfunc, probe);
dtrace_hash_add(dtrace_byname, probe);
-#if !defined(__APPLE__) /* Quiet compiler warning */
- if (id - 1 >= dtrace_nprobes) {
-#else
if (id - 1 >= (dtrace_id_t)dtrace_nprobes) {
-#endif /* __APPLE__ */
size_t osize = dtrace_nprobes * sizeof (dtrace_probe_t *);
size_t nsize = osize << 1;
dtrace_nprobes <<= 1;
}
-#if !defined(__APPLE__) /* Quiet compiler warning */
- ASSERT(id - 1 < dtrace_nprobes);
-#else
ASSERT(id - 1 < (dtrace_id_t)dtrace_nprobes);
-#endif /* __APPLE__ */
}
ASSERT(dtrace_probes[id - 1] == NULL);
dtrace_probes[id - 1] = probe;
- provider->probe_count++;
+ provider->dtpv_probe_count++;
if (provider != dtrace_provider)
lck_mtx_unlock(&dtrace_lock);
{
lck_mtx_assert(&dtrace_lock, LCK_MTX_ASSERT_OWNED);
-#if !defined(__APPLE__) /* Quiet compiler warning */
- if (id == 0 || id > dtrace_nprobes)
- return (NULL);
-#else
if (id == 0 || id > (dtrace_id_t)dtrace_nprobes)
return (NULL);
-#endif /* __APPLE__ */
return (dtrace_probes[id - 1]);
}
static int
-dtrace_probe_lookup_match(dtrace_probe_t *probe, void *arg)
+dtrace_probe_lookup_match(dtrace_probe_t *probe, void *arg1, void *arg2)
{
- *((dtrace_id_t *)arg) = probe->dtpr_id;
+#pragma unused(arg2)
+ *((dtrace_id_t *)arg1) = probe->dtpr_id;
return (DTRACE_MATCH_DONE);
}
lck_mtx_lock(&dtrace_lock);
match = dtrace_match(&pkey, DTRACE_PRIV_ALL, 0, 0,
- dtrace_probe_lookup_match, &id);
+ dtrace_probe_lookup_match, &id, NULL);
lck_mtx_unlock(&dtrace_lock);
ASSERT(match == 1 || match == 0);
bzero(pdp, sizeof (dtrace_probedesc_t));
pdp->dtpd_id = prp->dtpr_id;
-#if !defined(__APPLE__)
- (void) strncpy(pdp->dtpd_provider,
- prp->dtpr_provider->dtpv_name, DTRACE_PROVNAMELEN - 1);
-
- (void) strncpy(pdp->dtpd_mod, prp->dtpr_mod, DTRACE_MODNAMELEN - 1);
- (void) strncpy(pdp->dtpd_func, prp->dtpr_func, DTRACE_FUNCNAMELEN - 1);
- (void) strncpy(pdp->dtpd_name, prp->dtpr_name, DTRACE_NAMELEN - 1);
-#else /* Employ size bounded string operation. */
+ /* APPLE NOTE: Darwin employs size bounded string operation. */
(void) strlcpy(pdp->dtpd_provider,
prp->dtpr_provider->dtpv_name, DTRACE_PROVNAMELEN);
(void) strlcpy(pdp->dtpd_mod, prp->dtpr_mod, DTRACE_MODNAMELEN);
(void) strlcpy(pdp->dtpd_func, prp->dtpr_func, DTRACE_FUNCNAMELEN);
(void) strlcpy(pdp->dtpd_name, prp->dtpr_name, DTRACE_NAMELEN);
-#endif /* __APPLE__ */
}
/*
*/
lck_mtx_lock(&mod_lock);
-#if !defined(__APPLE__)
- ctl = &modules;
- do {
- if (ctl->mod_busy || ctl->mod_mp == NULL)
- continue;
-
- prv->dtpv_pops.dtps_provide_module(prv->dtpv_arg, ctl);
-
- } while ((ctl = ctl->mod_next) != &modules);
-#else
ctl = dtrace_modctl_list;
while (ctl) {
prv->dtpv_pops.dtps_provide_module(prv->dtpv_arg, ctl);
ctl = ctl->mod_next;
}
-#endif
lck_mtx_unlock(&mod_lock);
} while (all && (prv = prv->dtpv_next) != NULL);
}
static int
-dtrace_probe_enable(const dtrace_probedesc_t *desc, dtrace_enabling_t *enab)
+dtrace_probe_enable(const dtrace_probedesc_t *desc, dtrace_enabling_t *enab, dtrace_ecbdesc_t *ep)
{
dtrace_probekey_t pkey;
uint32_t priv;
* If we're passed a NULL description, we're being asked to
* create an ECB with a NULL probe.
*/
- (void) dtrace_ecb_create_enable(NULL, enab);
+ (void) dtrace_ecb_create_enable(NULL, enab, ep);
return (0);
}
&priv, &uid, &zoneid);
return (dtrace_match(&pkey, priv, uid, zoneid, dtrace_ecb_create_enable,
- enab));
+ enab, ep));
}
/*
}
static void
-dtrace_helper_provide_one(dof_helper_t *dhp, dof_sec_t *sec, pid_t pid)
+dtrace_helper_provide_one(dof_helper_t *dhp, dof_sec_t *sec, proc_t *p)
{
uintptr_t daddr = (uintptr_t)dhp->dofhp_dof;
dof_hdr_t *dof = (dof_hdr_t *)daddr;
*/
dtrace_dofprov2hprov(&dhpv, provider, strtab);
- if ((parg = mops->dtms_provide_pid(meta->dtm_arg, &dhpv, pid)) == NULL)
+ if ((parg = mops->dtms_provide_proc(meta->dtm_arg, &dhpv, p)) == NULL)
return;
meta->dtm_count++;
#else
dhpb.dthpb_base = dhp->dofhp_addr; /* FIXME: James, why? */
#endif
-#if !defined(__APPLE__) /* Quiet compiler warning */
- dhpb.dthpb_offs = off + probe->dofpr_offidx;
-#else
dhpb.dthpb_offs = (int32_t *)(off + probe->dofpr_offidx);
-#endif /* __APPLE__ */
dhpb.dthpb_noffs = probe->dofpr_noffs;
if (enoff != NULL) {
-#if !defined(__APPLE__) /* Quiet compiler warning */
- dhpb.dthpb_enoffs = enoff + probe->dofpr_enoffidx;
-#else
dhpb.dthpb_enoffs = (int32_t *)(enoff + probe->dofpr_enoffidx);
-#endif /* __APPLE__ */
dhpb.dthpb_nenoffs = probe->dofpr_nenoffs;
} else {
dhpb.dthpb_enoffs = NULL;
mops->dtms_create_probe(meta->dtm_arg, parg, &dhpb);
}
+
+ /*
+ * Since we just created probes, we need to match our enablings
+ * against those, with a precondition knowing that we have only
+ * added probes from this provider
+ */
+ char *prov_name = mops->dtms_provider_name(parg);
+ ASSERT(prov_name != NULL);
+ dtrace_match_cond_t cond = {dtrace_cond_provider_match, (void*)prov_name};
+
+ dtrace_enabling_matchall_with_cond(&cond);
}
static void
-dtrace_helper_provide(dof_helper_t *dhp, pid_t pid)
+dtrace_helper_provide(dof_helper_t *dhp, proc_t *p)
{
uintptr_t daddr = (uintptr_t)dhp->dofhp_dof;
dof_hdr_t *dof = (dof_hdr_t *)daddr;
-#if !defined(__APPLE__) /* Quiet compiler warning */
- int i;
-#else
uint32_t i;
-#endif /* __APPLE__ */
lck_mtx_assert(&dtrace_meta_lock, LCK_MTX_ASSERT_OWNED);
if (sec->dofs_type != DOF_SECT_PROVIDER)
continue;
- dtrace_helper_provide_one(dhp, sec, pid);
+ dtrace_helper_provide_one(dhp, sec, p);
}
-
- /*
- * We may have just created probes, so we must now rematch against
- * any retained enablings. Note that this call will acquire both
- * cpu_lock and dtrace_lock; the fact that we are holding
- * dtrace_meta_lock now is what defines the ordering with respect to
- * these three locks.
- */
- dtrace_enabling_matchall();
}
static void
-dtrace_helper_provider_remove_one(dof_helper_t *dhp, dof_sec_t *sec, pid_t pid)
+dtrace_helper_provider_remove_one(dof_helper_t *dhp, dof_sec_t *sec, proc_t *p)
{
uintptr_t daddr = (uintptr_t)dhp->dofhp_dof;
dof_hdr_t *dof = (dof_hdr_t *)daddr;
*/
dtrace_dofprov2hprov(&dhpv, provider, strtab);
- mops->dtms_remove_pid(meta->dtm_arg, &dhpv, pid);
+ mops->dtms_remove_proc(meta->dtm_arg, &dhpv, p);
meta->dtm_count--;
}
static void
-dtrace_helper_provider_remove(dof_helper_t *dhp, pid_t pid)
+dtrace_helper_provider_remove(dof_helper_t *dhp, proc_t *p)
{
uintptr_t daddr = (uintptr_t)dhp->dofhp_dof;
dof_hdr_t *dof = (dof_hdr_t *)daddr;
-#if !defined(__APPLE__) /* Quiet compiler warning */
- int i;
-#else
uint32_t i;
-#endif /* __APPLE__ */
lck_mtx_assert(&dtrace_meta_lock, LCK_MTX_ASSERT_OWNED);
if (sec->dofs_type != DOF_SECT_PROVIDER)
continue;
- dtrace_helper_provider_remove_one(dhp, sec, pid);
+ dtrace_helper_provider_remove_one(dhp, sec, p);
}
}
{
dtrace_meta_t *meta;
dtrace_helpers_t *help, *next;
-#if !defined(__APPLE__) /* Quiet compiler warning */
- int i;
-#else
uint_t i;
-#endif /* __APPLE__ */
*idp = DTRACE_METAPROVNONE;
if (mops == NULL ||
mops->dtms_create_probe == NULL ||
- mops->dtms_provide_pid == NULL ||
- mops->dtms_remove_pid == NULL) {
+ mops->dtms_provide_proc == NULL ||
+ mops->dtms_remove_proc == NULL) {
cmn_err(CE_WARN, "failed to register meta-register %s: "
"invalid ops", name);
return (EINVAL);
meta = kmem_zalloc(sizeof (dtrace_meta_t), KM_SLEEP);
meta->dtm_mops = *mops;
-#if !defined(__APPLE__)
- meta->dtm_name = kmem_alloc(strlen(name) + 1, KM_SLEEP);
- (void) strcpy(meta->dtm_name, name);
-#else /* Employ size bounded string operation. */
+
+ /* APPLE NOTE: Darwin employs size bounded string operation. */
{
size_t bufsize = strlen(name) + 1;
meta->dtm_name = kmem_alloc(bufsize, KM_SLEEP);
(void) strlcpy(meta->dtm_name, name, bufsize);
}
-#endif /* __APPLE__ */
+
meta->dtm_arg = arg;
lck_mtx_lock(&dtrace_meta_lock);
while (help != NULL) {
for (i = 0; i < help->dthps_nprovs; i++) {
+ proc_t *p = proc_find(help->dthps_pid);
+ if (p == PROC_NULL)
+ continue;
dtrace_helper_provide(&help->dthps_provs[i]->dthp_prov,
- help->dthps_pid);
+ p);
+ proc_rele(p);
}
next = help->dthps_next;
dtrace_difo_validate(dtrace_difo_t *dp, dtrace_vstate_t *vstate, uint_t nregs,
cred_t *cr)
{
-#if !defined(__APPLE__) /* Quiet compiler warnings */
- int err = 0, i;
-#else
int err = 0;
uint_t i;
-#endif /* __APPLE__ */
+
int (*efunc)(uint_t pc, const char *, ...) = dtrace_difo_err;
int kcheckload;
uint_t pc;
+ int maxglobal = -1, maxlocal = -1, maxtlocal = -1;
kcheckload = cr == NULL ||
(vstate->dtvs_state->dts_cred.dcr_visible & DTRACE_CRV_KERNEL) == 0;
err += efunc(pc, "invalid register %u\n", rd);
break;
case DIF_OP_CALL:
- if (subr > DIF_SUBR_MAX)
+ if (subr > DIF_SUBR_MAX &&
+ !(subr >= DIF_SUBR_APPLE_MIN && subr <= DIF_SUBR_APPLE_MAX))
err += efunc(pc, "invalid subr %u\n", subr);
if (rd >= nregs)
err += efunc(pc, "invalid register %u\n", rd);
err += efunc(pc, "cannot write to %r0\n");
if (subr == DIF_SUBR_COPYOUT ||
- subr == DIF_SUBR_COPYOUTSTR) {
+ subr == DIF_SUBR_COPYOUTSTR ||
+ subr == DIF_SUBR_KDEBUG_TRACE ||
+ subr == DIF_SUBR_KDEBUG_TRACE_STRING) {
dp->dtdo_destructive = 1;
}
break;
"expected 'ret' as last DIF instruction\n");
}
- if (!(dp->dtdo_rtype.dtdt_flags & DIF_TF_BYREF)) {
+ if (!(dp->dtdo_rtype.dtdt_flags & (DIF_TF_BYREF | DIF_TF_BYUREF))) {
/*
* If we're not returning by reference, the size must be either
* 0 or the size of one of the base types.
for (i = 0; i < dp->dtdo_varlen && err == 0; i++) {
dtrace_difv_t *v = &dp->dtdo_vartab[i], *existing = NULL;
dtrace_diftype_t *vt, *et;
-#if !defined(__APPLE__) /* Quiet compiler warnings */
- uint_t id, ndx;
-#else
uint_t id;
int ndx;
-#endif /* __APPLE__ */
if (v->dtdv_scope != DIFV_SCOPE_GLOBAL &&
v->dtdv_scope != DIFV_SCOPE_THREAD &&
switch (v->dtdv_scope) {
case DIFV_SCOPE_GLOBAL:
+ if (maxglobal == -1 || ndx > maxglobal)
+ maxglobal = ndx;
+
if (ndx < vstate->dtvs_nglobals) {
dtrace_statvar_t *svar;
break;
case DIFV_SCOPE_THREAD:
+ if (maxtlocal == -1 || ndx > maxtlocal)
+ maxtlocal = ndx;
+
if (ndx < vstate->dtvs_ntlocals)
existing = &vstate->dtvs_tlocals[ndx];
break;
case DIFV_SCOPE_LOCAL:
+ if (maxlocal == -1 || ndx > maxlocal)
+ maxlocal = ndx;
if (ndx < vstate->dtvs_nlocals) {
dtrace_statvar_t *svar;
break;
}
- if (v->dtdv_scope == DIFV_SCOPE_GLOBAL &&
- vt->dtdt_size > dtrace_global_maxsize) {
- err += efunc(i, "oversized by-ref global\n");
+ if ((v->dtdv_scope == DIFV_SCOPE_GLOBAL ||
+ v->dtdv_scope == DIFV_SCOPE_LOCAL) &&
+ vt->dtdt_size > dtrace_statvar_maxsize) {
+ err += efunc(i, "oversized by-ref static\n");
break;
}
}
}
}
+ for (pc = 0; pc < dp->dtdo_len && err == 0; pc++) {
+ dif_instr_t instr = dp->dtdo_buf[pc];
+
+ uint_t v = DIF_INSTR_VAR(instr);
+ uint_t op = DIF_INSTR_OP(instr);
+
+ switch (op) {
+ case DIF_OP_LDGS:
+ case DIF_OP_LDGAA:
+ case DIF_OP_STGS:
+ case DIF_OP_STGAA:
+ if (v > (uint_t)(DIF_VAR_OTHER_UBASE + maxglobal))
+ err += efunc(pc, "invalid variable %u\n", v);
+ break;
+ case DIF_OP_LDTS:
+ case DIF_OP_LDTAA:
+ case DIF_OP_STTS:
+ case DIF_OP_STTAA:
+ if (v > (uint_t)(DIF_VAR_OTHER_UBASE + maxtlocal))
+ err += efunc(pc, "invalid variable %u\n", v);
+ break;
+ case DIF_OP_LDLS:
+ case DIF_OP_STLS:
+ if (v > (uint_t)(DIF_VAR_OTHER_UBASE + maxlocal))
+ err += efunc(pc, "invalid variable %u\n", v);
+ break;
+ default:
+ break;
+ }
+ }
+
return (err);
}
subr == DIF_SUBR_STRJOIN ||
subr == DIF_SUBR_STRRCHR ||
subr == DIF_SUBR_STRSTR ||
-#if defined(__APPLE__)
- subr == DIF_SUBR_COREPROFILE ||
-#endif /* __APPLE__ */
+ subr == DIF_SUBR_KDEBUG_TRACE ||
+ subr == DIF_SUBR_KDEBUG_TRACE_STRING ||
subr == DIF_SUBR_HTONS ||
subr == DIF_SUBR_HTONL ||
subr == DIF_SUBR_HTONLL ||
static int
dtrace_difo_cacheable(dtrace_difo_t *dp)
{
-#if !defined(__APPLE__) /* Quiet compiler warnings */
- int i;
-#else
uint_t i;
-#endif /* __APPLE__ */
if (dp == NULL)
return (0);
static void
dtrace_difo_hold(dtrace_difo_t *dp)
{
-#if !defined(__APPLE__) /* Quiet compiler warnings */
- int i;
-#else
uint_t i;
-#endif /* __APPLE__ */
lck_mtx_assert(&dtrace_lock, LCK_MTX_ASSERT_OWNED);
static void
dtrace_difo_chunksize(dtrace_difo_t *dp, dtrace_vstate_t *vstate)
{
-#if !defined(__APPLE__) /* Quiet compiler warnings */
- uint64_t sval;
-#else
uint64_t sval = 0;
-#endif /* __APPLE__ */
dtrace_key_t tupregs[DIF_DTR_NREGS + 2]; /* +2 for thread and id */
const dif_instr_t *text = dp->dtdo_buf;
uint_t pc, srd = 0;
if (srd == 0)
return;
+ if (sval > LONG_MAX)
+ return;
+
tupregs[ttop++].dttk_size = sval;
}
*/
size = P2ROUNDUP(size, sizeof (uint64_t));
+ /*
+ * Before setting the chunk size, check that we're not going
+ * to set it to a negative value...
+ */
+ if (size > LONG_MAX)
+ return;
+
+ /*
+ * ...and make certain that we didn't badly overflow.
+ */
+ if (size < ksize || size < sizeof (dtrace_dynvar_t))
+ return;
+
if (size > vstate->dtvs_dynvars.dtds_chunksize)
vstate->dtvs_dynvars.dtds_chunksize = size;
}
static void
dtrace_difo_init(dtrace_difo_t *dp, dtrace_vstate_t *vstate)
{
-#if !defined(__APPLE__) /* Quiet compiler warnings */
- int i, oldsvars, osz, nsz, otlocals, ntlocals;
- uint_t id;
-#else
int oldsvars, osz, nsz, otlocals, ntlocals;
uint_t i, id;
-#endif /* __APPLE__ */
lck_mtx_assert(&dtrace_lock, LCK_MTX_ASSERT_OWNED);
ASSERT(dp->dtdo_buf != NULL && dp->dtdo_len != 0);
for (i = 0; i < dp->dtdo_varlen; i++) {
dtrace_difv_t *v = &dp->dtdo_vartab[i];
-#if !defined(__APPLE__) /* Quiet compiler warnings */
- dtrace_statvar_t *svar, ***svarp;
-#else
dtrace_statvar_t *svar;
dtrace_statvar_t ***svarp = NULL;
-#endif /* __APPLE__ */
size_t dsize = 0;
uint8_t scope = v->dtdv_scope;
int *np = (int *)NULL;
switch (scope) {
case DIFV_SCOPE_THREAD:
-#if !defined(__APPLE__) /* Quiet compiler warnings */
- while (id >= (otlocals = vstate->dtvs_ntlocals)) {
-#else
while (id >= (uint_t)(otlocals = vstate->dtvs_ntlocals)) {
-#endif /* __APPLE__ */
dtrace_difv_t *tlocals;
if ((ntlocals = (otlocals << 1)) == 0)
ASSERT(0);
}
-#if !defined(__APPLE__) /* Quiet compiler warnings */
- while (id >= (oldsvars = *np)) {
-#else
while (id >= (uint_t)(oldsvars = *np)) {
-#endif /* __APPLE__ */
dtrace_statvar_t **statics;
int newsvars, oldsize, newsize;
static void
dtrace_difo_destroy(dtrace_difo_t *dp, dtrace_vstate_t *vstate)
{
-#if !defined(__APPLE__) /* Quiet compiler warnings */
- int i;
-#else
uint_t i;
-#endif /* __APPLE__ */
ASSERT(dp->dtdo_refcnt == 0);
for (i = 0; i < dp->dtdo_varlen; i++) {
dtrace_difv_t *v = &dp->dtdo_vartab[i];
-#if !defined(__APPLE__) /* Quiet compiler warnings */
- dtrace_statvar_t *svar, **svarp;
- uint_t id;
- uint8_t scope = v->dtdv_scope;
- int *np;
-#else
dtrace_statvar_t *svar;
dtrace_statvar_t **svarp = NULL;
uint_t id;
uint8_t scope = v->dtdv_scope;
int *np = NULL;
-#endif /* __APPLE__ */
switch (scope) {
case DIFV_SCOPE_THREAD:
id -= DIF_VAR_OTHER_UBASE;
-#if !defined(__APPLE__) /* Quiet compiler warnings */
- ASSERT(id < *np);
-#else
ASSERT(id < (uint_t)*np);
-#endif /* __APPLE__ */
svar = svarp[id];
ASSERT(svar != NULL);
continue;
if (svar->dtsv_size != 0) {
- ASSERT(svar->dtsv_data != NULL);
+ ASSERT(svar->dtsv_data != 0);
kmem_free((void *)(uintptr_t)svar->dtsv_data,
svar->dtsv_size);
}
static void
dtrace_difo_release(dtrace_difo_t *dp, dtrace_vstate_t *vstate)
{
-#if !defined(__APPLE__) /* Quiet compiler warnings */
- int i;
-#else
uint_t i;
-#endif /* __APPLE__ */
lck_mtx_assert(&dtrace_lock, LCK_MTX_ASSERT_OWNED);
ASSERT(dp->dtdo_refcnt != 0);
{
dtrace_actdesc_t *act;
- ASSERT(!DTRACEACT_ISPRINTFLIKE(kind) || (arg != NULL &&
- arg >= KERNELBASE) || (arg == NULL && kind == DTRACEACT_PRINTA));
+ ASSERT(!DTRACEACT_ISPRINTFLIKE(kind) || (arg != 0 &&
+ arg >= KERNELBASE) || (arg == 0 && kind == DTRACEACT_PRINTA));
act = kmem_zalloc(sizeof (dtrace_actdesc_t), KM_SLEEP);
act->dtad_kind = kind;
/*
* The default size is the size of the default action: recording
- * the epid.
+ * the header.
*/
- ecb->dte_size = ecb->dte_needed = sizeof (dtrace_epid_t);
+ ecb->dte_size = ecb->dte_needed = sizeof (dtrace_rechdr_t);
ecb->dte_alignment = sizeof (dtrace_epid_t);
epid = state->dts_epid++;
-#if !defined(__APPLE__) /* Quiet compiler warnings */
- if (epid - 1 >= state->dts_necbs) {
-#else
if (epid - 1 >= (dtrace_epid_t)state->dts_necbs) {
-#endif /* __APPLE__ */
dtrace_ecb_t **oecbs = state->dts_ecbs, **ecbs;
int necbs = state->dts_necbs << 1;
-#if !defined(__APPLE__) /* Quiet compiler warnings */
- ASSERT(epid == state->dts_necbs + 1);
-#else
ASSERT(epid == (dtrace_epid_t)state->dts_necbs + 1);
-#endif /* __APPLE__ */
if (necbs == 0) {
ASSERT(oecbs == NULL);
return(0);
}
- probe->dtpr_provider->ecb_count++;
+ probe->dtpr_provider->dtpv_ecb_count++;
if (probe->dtpr_ecb == NULL) {
dtrace_provider_t *prov = probe->dtpr_provider;
}
}
-static void
+static int
dtrace_ecb_resize(dtrace_ecb_t *ecb)
{
- uint32_t maxalign = sizeof (dtrace_epid_t);
- uint32_t align = sizeof (uint8_t), offs, diff;
dtrace_action_t *act;
- int wastuple = 0;
+ uint32_t curneeded = UINT32_MAX;
uint32_t aggbase = UINT32_MAX;
- dtrace_state_t *state = ecb->dte_state;
/*
- * If we record anything, we always record the epid. (And we always
- * record it first.)
+ * If we record anything, we always record the dtrace_rechdr_t. (And
+ * we always record it first.)
*/
- offs = sizeof (dtrace_epid_t);
- ecb->dte_size = ecb->dte_needed = sizeof (dtrace_epid_t);
+ ecb->dte_size = sizeof (dtrace_rechdr_t);
+ ecb->dte_alignment = sizeof (dtrace_epid_t);
for (act = ecb->dte_action; act != NULL; act = act->dta_next) {
dtrace_recdesc_t *rec = &act->dta_rec;
+ ASSERT(rec->dtrd_size > 0 || rec->dtrd_alignment == 1);
- if ((align = rec->dtrd_alignment) > maxalign)
- maxalign = align;
-
- if (!wastuple && act->dta_intuple) {
- /*
- * This is the first record in a tuple. Align the
- * offset to be at offset 4 in an 8-byte aligned
- * block.
- */
- diff = offs + sizeof (dtrace_aggid_t);
-
- if ((diff = (diff & (sizeof (uint64_t) - 1))))
- offs += sizeof (uint64_t) - diff;
-
- aggbase = offs - sizeof (dtrace_aggid_t);
- ASSERT(!(aggbase & (sizeof (uint64_t) - 1)));
- }
-
- /*LINTED*/
- if (rec->dtrd_size != 0 && (diff = (offs & (align - 1)))) {
- /*
- * The current offset is not properly aligned; align it.
- */
- offs += align - diff;
- }
-
- rec->dtrd_offset = offs;
-
- if (offs + rec->dtrd_size > ecb->dte_needed) {
- ecb->dte_needed = offs + rec->dtrd_size;
-
- if (ecb->dte_needed > state->dts_needed)
- state->dts_needed = ecb->dte_needed;
- }
+ ecb->dte_alignment = MAX(ecb->dte_alignment, rec->dtrd_alignment);
if (DTRACEACT_ISAGG(act->dta_kind)) {
dtrace_aggregation_t *agg = (dtrace_aggregation_t *)act;
- dtrace_action_t *first = agg->dtag_first, *prev;
- ASSERT(rec->dtrd_size != 0 && first != NULL);
- ASSERT(wastuple);
+ ASSERT(rec->dtrd_size != 0);
+ ASSERT(agg->dtag_first != NULL);
+ ASSERT(act->dta_prev->dta_intuple);
ASSERT(aggbase != UINT32_MAX);
+ ASSERT(curneeded != UINT32_MAX);
agg->dtag_base = aggbase;
+ curneeded = P2ROUNDUP(curneeded, rec->dtrd_alignment);
+ rec->dtrd_offset = curneeded;
+ if (curneeded + rec->dtrd_size < curneeded)
+ return (EINVAL);
+ curneeded += rec->dtrd_size;
+ ecb->dte_needed = MAX(ecb->dte_needed, curneeded);
- while ((prev = first->dta_prev) != NULL &&
- DTRACEACT_ISAGG(prev->dta_kind)) {
- agg = (dtrace_aggregation_t *)prev;
- first = agg->dtag_first;
- }
+ aggbase = UINT32_MAX;
+ curneeded = UINT32_MAX;
+ } else if (act->dta_intuple) {
+ if (curneeded == UINT32_MAX) {
+ /*
+ * This is the first record in a tuple. Align
+ * curneeded to be at offset 4 in an 8-byte
+ * aligned block.
+ */
+ ASSERT(act->dta_prev == NULL || !act->dta_prev->dta_intuple);
+ ASSERT(aggbase == UINT32_MAX);
- if (prev != NULL) {
- offs = prev->dta_rec.dtrd_offset +
- prev->dta_rec.dtrd_size;
- } else {
- offs = sizeof (dtrace_epid_t);
+ curneeded = P2PHASEUP(ecb->dte_size,
+ sizeof (uint64_t), sizeof (dtrace_aggid_t));
+
+ aggbase = curneeded - sizeof (dtrace_aggid_t);
+ ASSERT(IS_P2ALIGNED(aggbase,
+ sizeof (uint64_t)));
}
- wastuple = 0;
- } else {
- if (!act->dta_intuple)
- ecb->dte_size = offs + rec->dtrd_size;
- offs += rec->dtrd_size;
+ curneeded = P2ROUNDUP(curneeded, rec->dtrd_alignment);
+ rec->dtrd_offset = curneeded;
+ curneeded += rec->dtrd_size;
+ if (curneeded + rec->dtrd_size < curneeded)
+ return (EINVAL);
+ } else {
+ /* tuples must be followed by an aggregation */
+ ASSERT(act->dta_prev == NULL || !act->dta_prev->dta_intuple);
+ ecb->dte_size = P2ROUNDUP(ecb->dte_size, rec->dtrd_alignment);
+ rec->dtrd_offset = ecb->dte_size;
+ if (ecb->dte_size + rec->dtrd_size < ecb->dte_size)
+ return (EINVAL);
+ ecb->dte_size += rec->dtrd_size;
+ ecb->dte_needed = MAX(ecb->dte_needed, ecb->dte_size);
}
-
- wastuple = act->dta_intuple;
}
if ((act = ecb->dte_action) != NULL &&
!(act->dta_kind == DTRACEACT_SPECULATE && act->dta_next == NULL) &&
- ecb->dte_size == sizeof (dtrace_epid_t)) {
+ ecb->dte_size == sizeof (dtrace_rechdr_t)) {
/*
- * If the size is still sizeof (dtrace_epid_t), then all
+ * If the size is still sizeof (dtrace_rechdr_t), then all
* actions store no data; set the size to 0.
*/
- ecb->dte_alignment = maxalign;
ecb->dte_size = 0;
-
- /*
- * If the needed space is still sizeof (dtrace_epid_t), then
- * all actions need no additional space; set the needed
- * size to 0.
- */
- if (ecb->dte_needed == sizeof (dtrace_epid_t))
- ecb->dte_needed = 0;
-
- return;
}
- /*
- * Set our alignment, and make sure that the dte_size and dte_needed
- * are aligned to the size of an EPID.
- */
- ecb->dte_alignment = maxalign;
- ecb->dte_size = (ecb->dte_size + (sizeof (dtrace_epid_t) - 1)) &
- ~(sizeof (dtrace_epid_t) - 1);
- ecb->dte_needed = (ecb->dte_needed + (sizeof (dtrace_epid_t) - 1)) &
- ~(sizeof (dtrace_epid_t) - 1);
- ASSERT(ecb->dte_size <= ecb->dte_needed);
+ ecb->dte_size = P2ROUNDUP(ecb->dte_size, sizeof (dtrace_epid_t));
+ ecb->dte_needed = P2ROUNDUP(ecb->dte_needed, (sizeof (dtrace_epid_t)));
+ ecb->dte_state->dts_needed = MAX(ecb->dte_state->dts_needed, ecb->dte_needed);
+ return (0);
}
static dtrace_action_t *
aggid = (dtrace_aggid_t)(uintptr_t)vmem_alloc(state->dts_aggid_arena, 1,
VM_BESTFIT | VM_SLEEP);
-#if !defined(__APPLE__) /* Quiet compiler warnings */
- if (aggid - 1 >= state->dts_naggregations) {
-#else
if (aggid - 1 >= (dtrace_aggid_t)state->dts_naggregations) {
-#endif /* __APPLE__ */
dtrace_aggregation_t **oaggs = state->dts_aggregations;
dtrace_aggregation_t **aggs;
int naggs = state->dts_naggregations << 1;
int onaggs = state->dts_naggregations;
-#if !defined(__APPLE__) /* Quiet compiler warnings */
- ASSERT(aggid == state->dts_naggregations + 1);
-#else
ASSERT(aggid == (dtrace_aggid_t)state->dts_naggregations + 1);
-#endif /* __APPLE */
if (naggs == 0) {
ASSERT(oaggs == NULL);
uint16_t format = 0;
dtrace_recdesc_t *rec;
dtrace_state_t *state = ecb->dte_state;
-#if !defined(__APPLE__) /* Quiet compiler warnings */
- dtrace_optval_t *opt = state->dts_options, nframes, strsize;
-#else
dtrace_optval_t *opt = state->dts_options;
dtrace_optval_t nframes=0, strsize;
-#endif /* __APPLE__ */
uint64_t arg = desc->dtad_arg;
lck_mtx_assert(&dtrace_lock, LCK_MTX_ASSERT_OWNED);
case DTRACEACT_PRINTA:
case DTRACEACT_SYSTEM:
case DTRACEACT_FREOPEN:
+ case DTRACEACT_DIFEXPR:
/*
* We know that our arg is a string -- turn it into a
* format.
*/
- if (arg == NULL) {
- ASSERT(desc->dtad_kind == DTRACEACT_PRINTA);
+ if (arg == 0) {
+ ASSERT(desc->dtad_kind == DTRACEACT_PRINTA ||
+ desc->dtad_kind == DTRACEACT_DIFEXPR);
format = 0;
} else {
- ASSERT(arg != NULL);
+ ASSERT(arg != 0);
ASSERT(arg > KERNELBASE);
format = dtrace_format_add(state,
(char *)(uintptr_t)arg);
/*FALLTHROUGH*/
case DTRACEACT_LIBACT:
- case DTRACEACT_DIFEXPR:
-#if defined(__APPLE__)
- case DTRACEACT_APPLEBINARY:
-#endif /* __APPLE__ */
+ case DTRACEACT_TRACEMEM:
+ case DTRACEACT_TRACEMEM_DYNSIZE:
+ case DTRACEACT_APPLEBINARY: /* __APPLE__ */
if (dp == NULL)
return (EINVAL);
case DTRACEACT_CHILL:
case DTRACEACT_DISCARD:
case DTRACEACT_RAISE:
-#if defined(__APPLE__)
- case DTRACEACT_PIDRESUME:
-#endif /* __APPLE__ */
+ case DTRACEACT_PIDRESUME: /* __APPLE__ */
if (dp == NULL)
return (EINVAL);
break;
break;
case DTRACEACT_SPECULATE:
- if (ecb->dte_size > sizeof (dtrace_epid_t))
+ if (ecb->dte_size > sizeof (dtrace_rechdr_t))
return (EINVAL);
if (dp == NULL)
ecb->dte_action = NULL;
ecb->dte_action_last = NULL;
- ecb->dte_size = sizeof (dtrace_epid_t);
+ ecb->dte_size = 0;
}
static void
probe->dtpr_ecb_last = prev;
}
- probe->dtpr_provider->ecb_count--;
+ probe->dtpr_provider->dtpv_ecb_count--;
/*
* The ECB has been disconnected from the probe; now sync to assure
* that all CPUs have seen the change before returning.
}
}
- dtrace_ecb_resize(ecb);
+ if ((enab->dten_error = dtrace_ecb_resize(ecb)) != 0) {
+ dtrace_ecb_destroy(ecb);
+ return (NULL);
+ }
return (dtrace_ecb_create_cache = ecb);
}
static int
-dtrace_ecb_create_enable(dtrace_probe_t *probe, void *arg)
+dtrace_ecb_create_enable(dtrace_probe_t *probe, void *arg1, void *arg2)
{
dtrace_ecb_t *ecb;
- dtrace_enabling_t *enab = arg;
+ dtrace_enabling_t *enab = arg1;
+ dtrace_ecbdesc_t *ep = arg2;
dtrace_state_t *state = enab->dten_vstate->dtvs_state;
ASSERT(state != NULL);
- if (probe != NULL && probe->dtpr_gen < enab->dten_probegen) {
+ if (probe != NULL && ep != NULL && probe->dtpr_gen < ep->dted_probegen) {
/*
* This probe was created in a generation for which this
* enabling has previously created ECBs; we don't want to
lck_mtx_assert(&dtrace_lock, LCK_MTX_ASSERT_OWNED);
-#if !defined(__APPLE__) /* Quiet compiler warnings */
- if (id == 0 || id > state->dts_necbs)
-#else
- if (id == 0 || id > (dtrace_epid_t)state->dts_necbs)
-#endif /* __APPLE__ */
+ if (id == 0 || id > (dtrace_epid_t)state->dts_necbs)
return (NULL);
ASSERT(state->dts_necbs > 0 && state->dts_ecbs != NULL);
lck_mtx_assert(&dtrace_lock, LCK_MTX_ASSERT_OWNED);
-#if !defined(__APPLE__) /* Quiet compiler warnings */
- if (id == 0 || id > state->dts_naggregations)
-#else
if (id == 0 || id > (dtrace_aggid_t)state->dts_naggregations)
-#endif /* __APPLE__ */
return (NULL);
ASSERT(state->dts_naggregations > 0 && state->dts_aggregations != NULL);
caddr_t tomax = buf->dtb_tomax;
caddr_t xamot = buf->dtb_xamot;
dtrace_icookie_t cookie;
+ hrtime_t now;
ASSERT(!(buf->dtb_flags & DTRACEBUF_NOSWITCH));
ASSERT(!(buf->dtb_flags & DTRACEBUF_RING));
cookie = dtrace_interrupt_disable();
+ now = dtrace_gethrtime();
buf->dtb_tomax = xamot;
buf->dtb_xamot = tomax;
buf->dtb_xamot_drops = buf->dtb_drops;
buf->dtb_drops = 0;
buf->dtb_errors = 0;
buf->dtb_flags &= ~(DTRACEBUF_ERROR | DTRACEBUF_DROPPED);
+ buf->dtb_interval = now - buf->dtb_switched;
+ buf->dtb_switched = now;
+ buf->dtb_cur_limit = buf->dtb_limit;
+
dtrace_interrupt_enable(cookie);
}
}
static int
-dtrace_buffer_alloc(dtrace_buffer_t *bufs, size_t size, int flags,
+dtrace_buffer_canalloc(size_t size)
+{
+ if (size > (UINT64_MAX - dtrace_buffer_memory_inuse))
+ return (B_FALSE);
+ if ((size + dtrace_buffer_memory_inuse) > dtrace_buffer_memory_maxsize)
+ return (B_FALSE);
+
+ return (B_TRUE);
+}
+
+static int
+dtrace_buffer_alloc(dtrace_buffer_t *bufs, size_t limit, size_t size, int flags,
processorid_t cpu)
{
dtrace_cpu_t *cp;
dtrace_buffer_t *buf;
+ size_t size_before_alloc = dtrace_buffer_memory_inuse;
lck_mtx_assert(&cpu_lock, LCK_MTX_ASSERT_OWNED);
lck_mtx_assert(&dtrace_lock, LCK_MTX_ASSERT_OWNED);
-#if !defined(__APPLE__) /* Quiet compiler warnings */
- if (size > dtrace_nonroot_maxsize &&
- !PRIV_POLICY_CHOICE(CRED(), PRIV_ALL, B_FALSE))
- return (EFBIG);
-#else
if (size > (size_t)dtrace_nonroot_maxsize &&
!PRIV_POLICY_CHOICE(CRED(), PRIV_ALL, B_FALSE))
return (EFBIG);
-#endif /* __APPLE__ */
-
-
-#if defined(__APPLE__)
- if (size > (sane_size / 8) / (int)NCPU) /* As in kdbg_set_nkdbufs(), roughly. */
- return (ENOMEM);
-#endif /* __APPLE__ */
cp = cpu_list;
ASSERT(buf->dtb_xamot == NULL);
+
+ /* DTrace, please do not eat all the memory. */
+ if (dtrace_buffer_canalloc(size) == B_FALSE)
+ goto err;
if ((buf->dtb_tomax = kmem_zalloc(size, KM_NOSLEEP)) == NULL)
goto err;
+ dtrace_buffer_memory_inuse += size;
+ /* Unsure that limit is always lower than size */
+ limit = limit == size ? limit - 1 : limit;
+ buf->dtb_cur_limit = limit;
+ buf->dtb_limit = limit;
buf->dtb_size = size;
buf->dtb_flags = flags;
buf->dtb_offset = 0;
if (flags & DTRACEBUF_NOSWITCH)
continue;
+ /* DTrace, please do not eat all the memory. */
+ if (dtrace_buffer_canalloc(size) == B_FALSE)
+ goto err;
if ((buf->dtb_xamot = kmem_zalloc(size, KM_NOSLEEP)) == NULL)
goto err;
+ dtrace_buffer_memory_inuse += size;
} while ((cp = cp->cpu_next) != cpu_list);
+ ASSERT(dtrace_buffer_memory_inuse <= dtrace_buffer_memory_maxsize);
+
return (0);
err:
buf->dtb_size = 0;
} while ((cp = cp->cpu_next) != cpu_list);
+ /* Restore the size saved before allocating memory */
+ dtrace_buffer_memory_inuse = size_before_alloc;
+
return (ENOMEM);
}
offs += sizeof (uint32_t);
}
-#if !defined(__APPLE__) /* Quiet compiler warnings */
- if ((soffs = offs + needed) > buf->dtb_size) {
-#else
- if ((uint64_t)(soffs = offs + needed) > buf->dtb_size) {
-#endif /* __APPLE__ */
- dtrace_buffer_drop(buf);
- return (-1);
+ if ((uint64_t)(soffs = offs + needed) > buf->dtb_cur_limit) {
+ if (buf->dtb_cur_limit == buf->dtb_limit) {
+ buf->dtb_cur_limit = buf->dtb_size;
+
+ atomic_add_32(&state->dts_buf_over_limit, 1);
+ /**
+ * Set an AST on the current processor
+ * so that we can wake up the process
+ * outside of probe context, when we know
+ * it is safe to do so
+ */
+ minor_t minor = getminor(state->dts_dev);
+ ASSERT(minor < 32);
+
+ atomic_or_32(&dtrace_wake_clients, 1 << minor);
+ ast_dtrace_on();
+ }
+ if ((uint64_t)soffs > buf->dtb_size) {
+ dtrace_buffer_drop(buf);
+ return (-1);
+ }
}
if (mstate == NULL)
* there. We need to clear the buffer from the current
* offset to the end (there may be old gunk there).
*/
-#if !defined(__APPLE__) /* Quiet compiler warnings */
- while (offs < buf->dtb_size)
-#else
while ((uint64_t)offs < buf->dtb_size)
-#endif /* __APPLE__ */
tomax[offs++] = 0;
/*
}
}
-#if !defined(__APPLE__) /* Quiet compiler warnings */
- while (offs + total_off > woffs) {
-#else
while (offs + total_off > (size_t)woffs) {
-#endif /* __APPLE__ */
dtrace_epid_t epid = *(uint32_t *)(tomax + woffs);
size_t size;
if (epid == DTRACE_EPIDNONE) {
size = sizeof (uint32_t);
} else {
-#if !defined(__APPLE__) /* Quiet compiler warnings */
- ASSERT(epid <= state->dts_necbs);
-#else
ASSERT(epid <= (dtrace_epid_t)state->dts_necbs);
-#endif /* __APPLE__ */
ASSERT(state->dts_ecbs[epid - 1] != NULL);
size = state->dts_ecbs[epid - 1]->dte_size;
buf->dtb_offset = 0;
woffs = total_off;
-#if !defined(__APPLE__) /* Quiet compiler warnings */
- while (woffs < buf->dtb_size)
-#else
while ((uint64_t)woffs < buf->dtb_size)
-#endif /* __APPLE__ */
-
tomax[woffs++] = 0;
}
if (buf->dtb_xamot != NULL) {
ASSERT(!(buf->dtb_flags & DTRACEBUF_NOSWITCH));
kmem_free(buf->dtb_xamot, buf->dtb_size);
+
+ ASSERT(dtrace_buffer_memory_inuse >= buf->dtb_size);
+ dtrace_buffer_memory_inuse -= buf->dtb_size;
}
kmem_free(buf->dtb_tomax, buf->dtb_size);
+ ASSERT(dtrace_buffer_memory_inuse >= buf->dtb_size);
+ dtrace_buffer_memory_inuse -= buf->dtb_size;
+
buf->dtb_size = 0;
buf->dtb_tomax = NULL;
buf->dtb_xamot = NULL;
ASSERT(enab->dten_probegen == 0);
ASSERT(enab->dten_next == NULL && enab->dten_prev == NULL);
-#if defined(__APPLE__)
- if (ecb == NULL) return; /* Note: protection against gcc 4.0 botch on x86 */
-#endif /* __APPLE__ */
+ /* APPLE NOTE: this protects against gcc 4.0 botch on x86 */
+ if (ecb == NULL) return;
if (enab->dten_ndesc < enab->dten_maxdesc) {
enab->dten_desc[enab->dten_ndesc++] = ecb;
dtrace_ecbdesc_t *ep = enab->dten_desc[i];
dtrace_probedesc_t *pd = &ep->dted_probe;
-#if !defined(__APPLE__)
- if (strcmp(pd->dtpd_provider, match->dtpd_provider))
- continue;
-
- if (strcmp(pd->dtpd_mod, match->dtpd_mod))
- continue;
-
- if (strcmp(pd->dtpd_func, match->dtpd_func))
- continue;
-
- if (strcmp(pd->dtpd_name, match->dtpd_name))
- continue;
-#else /* Employ size bounded string operation. */
+ /* APPLE NOTE: Darwin employs size bounded string operation. */
if (strncmp(pd->dtpd_provider, match->dtpd_provider, DTRACE_PROVNAMELEN))
continue;
if (strncmp(pd->dtpd_name, match->dtpd_name, DTRACE_NAMELEN))
continue;
-#endif /* __APPLE__ */
/*
* We have a winning probe! Add it to our growing
}
static int
-dtrace_enabling_match(dtrace_enabling_t *enab, int *nmatched)
+dtrace_enabling_match(dtrace_enabling_t *enab, int *nmatched, dtrace_match_cond_t *cond)
{
int i = 0;
int total_matched = 0, matched = 0;
enab->dten_current = ep;
enab->dten_error = 0;
+ /**
+ * Before doing a dtrace_probe_enable, which is really
+ * expensive, check that this enabling matches the matching precondition
+ * if we have one
+ */
+ if (cond && (cond->dmc_func(&ep->dted_probe, cond->dmc_data) == 0)) {
+ continue;
+ }
/*
* If a provider failed to enable a probe then get out and
* let the consumer know we failed.
*/
- if ((matched = dtrace_probe_enable(&ep->dted_probe, enab)) < 0)
+ if ((matched = dtrace_probe_enable(&ep->dted_probe, enab, ep)) < 0)
return (EBUSY);
total_matched += matched;
return (enab->dten_error);
}
+
+ ep->dted_probegen = dtrace_probegen;
}
- enab->dten_probegen = dtrace_probegen;
if (nmatched != NULL)
*nmatched = total_matched;
}
static void
-dtrace_enabling_matchall(void)
+dtrace_enabling_matchall_with_cond(dtrace_match_cond_t *cond)
{
dtrace_enabling_t *enab;
* however: the taskq_destroy() at the end of dtrace_detach() will
* block pending our completion.
*/
- for (enab = dtrace_retained; enab != NULL; enab = enab->dten_next) {
-#if !defined(__APPLE__)
- cred_t *cr = enab->dten_vstate->dtvs_state->dts_cred.dcr_cred;
- if (INGLOBALZONE(curproc) ||
- cr != NULL && getzoneid() == crgetzoneid(cr))
- (void) dtrace_enabling_match(enab, NULL);
-#else
- (void) dtrace_enabling_match(enab, NULL); /* As if always in "global" zone." */
-#endif /* __APPLE__ */
+ /*
+ * Darwin doesn't do zones.
+ * Behave as if always in "global" zone."
+ */
+ for (enab = dtrace_retained; enab != NULL; enab = enab->dten_next) {
+ (void) dtrace_enabling_match(enab, NULL, cond);
}
lck_mtx_unlock(&dtrace_lock);
lck_mtx_unlock(&cpu_lock);
+
+}
+
+static void
+dtrace_enabling_matchall(void)
+{
+ dtrace_enabling_matchall_with_cond(NULL);
}
+
+
/*
* If an enabling is to be enabled without having matched probes (that is, if
* dtrace_state_go() is to be called on the underlying dtrace_state_t), the
for (i = 0; i < enab->dten_ndesc; i++) {
enab->dten_current = enab->dten_desc[i];
- (void) dtrace_probe_enable(NULL, enab);
+ (void) dtrace_probe_enable(NULL, enab, NULL);
}
enab->dten_primed = 1;
lck_mtx_assert(&dtrace_lock, LCK_MTX_ASSERT_OWNED);
-#if !defined(__APPLE__)
- dof = kmem_zalloc(len, KM_SLEEP);
-#else
dof = dt_kmem_zalloc_aligned(len, 8, KM_SLEEP);
-#endif /* __APPLE__ */
dof->dofh_ident[DOF_ID_MAG0] = DOF_MAG_MAG0;
dof->dofh_ident[DOF_ID_MAG1] = DOF_MAG_MAG1;
dof->dofh_ident[DOF_ID_MAG2] = DOF_MAG_MAG2;
}
static dof_hdr_t *
-#if !defined(__APPLE__)
-dtrace_dof_copyin(uintptr_t uarg, int *errp)
-#else
dtrace_dof_copyin(user_addr_t uarg, int *errp)
-#endif
{
dof_hdr_t hdr, *dof;
/*
* First, we're going to copyin() the sizeof (dof_hdr_t).
*/
-#if !defined(__APPLE__)
- if (copyin((void *)uarg, &hdr, sizeof (hdr)) != 0) {
-#else
if (copyin(uarg, &hdr, sizeof (hdr)) != 0) {
-#endif
dtrace_dof_error(NULL, "failed to copyin DOF header");
*errp = EFAULT;
return (NULL);
* Now we'll allocate the entire DOF and copy it in -- provided
* that the length isn't outrageous.
*/
-#if !defined(__APPLE__) /* Quiet compiler warnings */
- if (hdr.dofh_loadsz >= dtrace_dof_maxsize) {
-#else
if (hdr.dofh_loadsz >= (uint64_t)dtrace_dof_maxsize) {
-#endif /* __APPLE__ */
dtrace_dof_error(&hdr, "load size exceeds maximum");
*errp = E2BIG;
return (NULL);
return (NULL);
}
-#if !defined(__APPLE__)
- dof = kmem_alloc(hdr.dofh_loadsz, KM_SLEEP);
-
- if (copyin((void *)uarg, dof, hdr.dofh_loadsz) != 0 ||
- dof->dofh_loadsz != hdr.dofh_loadsz) {
- kmem_free(dof, hdr.dofh_loadsz);
- *errp = EFAULT;
- return (NULL);
- }
-#else
dof = dt_kmem_alloc_aligned(hdr.dofh_loadsz, 8, KM_SLEEP);
if (copyin(uarg, dof, hdr.dofh_loadsz) != 0 ||
*errp = EFAULT;
return (NULL);
}
-#endif
return (dof);
}
-#if defined(__APPLE__)
-
static dof_hdr_t *
dtrace_dof_copyin_from_proc(proc_t* p, user_addr_t uarg, int *errp)
{
return (dof);
}
-#endif /* __APPLE__ */
-
static dof_hdr_t *
dtrace_dof_property(const char *name)
{
* only) interpreted to be integer arrays. We must read our DOF
* as an integer array, and then squeeze it into a byte array.
*/
-#if !defined(__APPLE__) /* Quiet compiler warnings */
- if (ddi_prop_lookup_int_array(DDI_DEV_T_ANY, dtrace_devi, 0,
- (char *)name, (int **)&buf, &len) != DDI_PROP_SUCCESS)
- return (NULL);
-#else
if (ddi_prop_lookup_int_array(DDI_DEV_T_ANY, dtrace_devi, 0,
name, (int **)&buf, &len) != DDI_PROP_SUCCESS)
return (NULL);
-#endif /* __APPLE__ */
for (i = 0; i < len; i++)
buf[i] = (uchar_t)(((int *)buf)[i]);
return (NULL);
}
-#if !defined(__APPLE__) /* Quiet compiler warnings */
- if (loadsz >= dtrace_dof_maxsize) {
-#else
if (loadsz >= (uint64_t)dtrace_dof_maxsize) {
-#endif /* __APPLE__ */
ddi_prop_free(buf);
dtrace_dof_error(NULL, "oversized DOF");
return (NULL);
}
-#if !defined(__APPLE__)
- dof = kmem_alloc(loadsz, KM_SLEEP);
-#else
dof = dt_kmem_alloc_aligned(loadsz, 8, KM_SLEEP);
-#endif /* __APPLE__ */
bcopy(buf, dof, loadsz);
ddi_prop_free(buf);
static void
dtrace_dof_destroy(dof_hdr_t *dof)
{
-#if !defined(__APPLE__)
- kmem_free(dof, dof->dofh_loadsz);
-#else
dt_kmem_free_aligned(dof, dof->dofh_loadsz);
-#endif /* __APPLE__ */
}
/*
(void) strncpy(desc->dtpd_provider,
(char *)(str + probe->dofp_provider),
MIN(DTRACE_PROVNAMELEN - 1, size - probe->dofp_provider));
-#if defined(__APPLE__) /* Employ size bounded string operation. */
+
+ /* APPLE NOTE: Darwin employs size bounded string operation. */
desc->dtpd_provider[DTRACE_PROVNAMELEN - 1] = '\0';
-#endif /* __APPLE__ */
if (probe->dofp_mod >= strtab->dofs_size) {
dtrace_dof_error(dof, "corrupt probe module");
(void) strncpy(desc->dtpd_mod, (char *)(str + probe->dofp_mod),
MIN(DTRACE_MODNAMELEN - 1, size - probe->dofp_mod));
-#if defined(__APPLE__) /* Employ size bounded string operation. */
+
+ /* APPLE NOTE: Darwin employs size bounded string operation. */
desc->dtpd_mod[DTRACE_MODNAMELEN - 1] = '\0';
-#endif /* __APPLE__ */
if (probe->dofp_func >= strtab->dofs_size) {
dtrace_dof_error(dof, "corrupt probe function");
(void) strncpy(desc->dtpd_func, (char *)(str + probe->dofp_func),
MIN(DTRACE_FUNCNAMELEN - 1, size - probe->dofp_func));
-#if defined(__APPLE__) /* Employ size bounded string operation. */
+
+ /* APPLE NOTE: Darwin employs size bounded string operation. */
desc->dtpd_func[DTRACE_FUNCNAMELEN - 1] = '\0';
-#endif /* __APPLE__ */
if (probe->dofp_name >= strtab->dofs_size) {
dtrace_dof_error(dof, "corrupt probe name");
(void) strncpy(desc->dtpd_name, (char *)(str + probe->dofp_name),
MIN(DTRACE_NAMELEN - 1, size - probe->dofp_name));
-#if defined(__APPLE__) /* Employ size bounded string operation. */
+
+ /* APPLE NOTE: Darwin employs size bounded string operation. */
desc->dtpd_name[DTRACE_NAMELEN - 1] = '\0';
-#endif /* __APPLE__ */
return (desc);
}
dof_difohdr_t *dofd;
uintptr_t daddr = (uintptr_t)dof;
size_t max_size = dtrace_difo_maxsize;
-#if !defined(__APPLE__) /* Quiet compiler warnings */
- int i, l, n;
-#else
uint_t i;
int l, n;
-#endif /* __APPLE__ */
static const struct {
offsetof(dtrace_difo_t, dtdo_varlen), sizeof (dtrace_difv_t),
sizeof (uint_t), "multiple variable tables" },
-#if !defined(__APPLE__)
- { DOF_SECT_NONE, 0, 0, 0, NULL }
-#else
{ DOF_SECT_NONE, 0, 0, 0, 0, NULL }
-#endif /* __APPLE__ */
};
if (sec->dofs_type != DOF_SECT_DIFOHDR) {
for (i = 0; difo[i].section != DOF_SECT_NONE; i++) {
-#if !defined(__APPLE__) /* Quiet compiler warnings */
- if (subsec->dofs_type != difo[i].section)
- continue;
-#else
if (subsec->dofs_type != (uint32_t)difo[i].section)
continue;
-#endif /* __APPLE __ */
if (!(subsec->dofs_flags & DOF_SECF_LOAD)) {
dtrace_dof_error(dof, "section not loaded");
goto err;
}
-#if !defined(__APPLE__) /* Quiet compiler warnings */
- if (subsec->dofs_align != difo[i].align) {
- dtrace_dof_error(dof, "bad alignment");
- goto err;
- }
-#else
if (subsec->dofs_align != (uint32_t)difo[i].align) {
dtrace_dof_error(dof, "bad alignment");
goto err;
}
-#endif /* __APPLE__ */
bufp = (void **)((uintptr_t)dp + difo[i].bufoffs);
lenp = (uint32_t *)((uintptr_t)dp + difo[i].lenoffs);
goto err;
}
-#if !defined(__APPLE__) /* Quiet compiler warnings */
- if (difo[i].entsize != subsec->dofs_entsize) {
- dtrace_dof_error(dof, "entry size mismatch");
- goto err;
- }
-#else
if ((uint32_t)difo[i].entsize != subsec->dofs_entsize) {
dtrace_dof_error(dof, "entry size mismatch");
goto err;
}
-#endif /* __APPLE__ */
if (subsec->dofs_entsize != 0 &&
(subsec->dofs_size % subsec->dofs_entsize) != 0) {
(uintptr_t)sec->dofs_offset + offs);
kind = (dtrace_actkind_t)desc->dofa_kind;
- if (DTRACEACT_ISPRINTFLIKE(kind) &&
- (kind != DTRACEACT_PRINTA ||
- desc->dofa_strtab != DOF_SECIDX_NONE)) {
+ if ((DTRACEACT_ISPRINTFLIKE(kind) &&
+ (kind != DTRACEACT_PRINTA || desc->dofa_strtab != DOF_SECIDX_NONE)) ||
+ (kind == DTRACEACT_DIFEXPR && desc->dofa_strtab != DOF_SECIDX_NONE))
+ {
dof_sec_t *strtab;
char *str, *fmt;
uint64_t i;
/*
- * printf()-like actions must have a format string.
+ * The argument to these actions is an index into the
+ * DOF string table. For printf()-like actions, this
+ * is the format string. For print(), this is the
+ * CTF type of the expression result.
*/
if ((strtab = dtrace_dof_sect(dof,
DOF_SECT_STRTAB, desc->dofa_strtab)) == NULL)
return (NULL);
}
-#if !defined(__APPLE__) /* APPLE dyld has already done this for us */
/*
- * Apply the relocations from the specified 'sec' (a DOF_SECT_URELHDR) to the
- * specified DOF. At present, this amounts to simply adding 'ubase' to the
- * site of any user SETX relocations to account for load object base address.
- * In the future, if we need other relocations, this function can be extended.
+ * APPLE NOTE: dyld handles dof relocation.
+ * Darwin does not need dtrace_dof_relocate()
*/
-static int
-dtrace_dof_relocate(dof_hdr_t *dof, dof_sec_t *sec, uint64_t ubase)
-{
- uintptr_t daddr = (uintptr_t)dof;
- dof_relohdr_t *dofr =
- (dof_relohdr_t *)(uintptr_t)(daddr + sec->dofs_offset);
- dof_sec_t *ss, *rs, *ts;
- dof_relodesc_t *r;
- uint_t i, n;
-
- if (sec->dofs_size < sizeof (dof_relohdr_t) ||
- sec->dofs_align != sizeof (dof_secidx_t)) {
- dtrace_dof_error(dof, "invalid relocation header");
- return (-1);
- }
-
- ss = dtrace_dof_sect(dof, DOF_SECT_STRTAB, dofr->dofr_strtab);
- rs = dtrace_dof_sect(dof, DOF_SECT_RELTAB, dofr->dofr_relsec);
- ts = dtrace_dof_sect(dof, DOF_SECT_NONE, dofr->dofr_tgtsec);
-
- if (ss == NULL || rs == NULL || ts == NULL)
- return (-1); /* dtrace_dof_error() has been called already */
-
- if (rs->dofs_entsize < sizeof (dof_relodesc_t) ||
- rs->dofs_align != sizeof (uint64_t)) {
- dtrace_dof_error(dof, "invalid relocation section");
- return (-1);
- }
-
- r = (dof_relodesc_t *)(uintptr_t)(daddr + rs->dofs_offset);
- n = rs->dofs_size / rs->dofs_entsize;
-
- for (i = 0; i < n; i++) {
- uintptr_t taddr = daddr + ts->dofs_offset + r->dofr_offset;
-
- switch (r->dofr_type) {
- case DOF_RELO_NONE:
- break;
- case DOF_RELO_SETX:
- if (r->dofr_offset >= ts->dofs_size || r->dofr_offset +
- sizeof (uint64_t) > ts->dofs_size) {
- dtrace_dof_error(dof, "bad relocation offset");
- return (-1);
- }
-
- if (!IS_P2ALIGNED(taddr, sizeof (uint64_t))) {
- dtrace_dof_error(dof, "misaligned setx relo");
- return (-1);
- }
-
- *(uint64_t *)taddr += ubase;
- break;
- default:
- dtrace_dof_error(dof, "invalid relocation type");
- return (-1);
- }
-
- r = (dof_relodesc_t *)((uintptr_t)r + rs->dofs_entsize);
- }
-
- return (0);
-}
-#endif /* __APPLE__ */
/*
* The dof_hdr_t passed to dtrace_dof_slurp() should be a partially validated
return (-1);
}
-#if !defined(__APPLE__)
- if (dof->dofh_ident[DOF_ID_VERSION] != DOF_VERSION_1 &&
- dof->dofh_ident[DOF_ID_VERSION] != DOF_VERSION_2) {
- dtrace_dof_error(dof, "DOF version mismatch");
- return (-1);
- }
-#else
/*
- * We only support DOF_VERSION_3 for now.
+ * APPLE NOTE: Darwin only supports DOF_VERSION_3 for now.
*/
if (dof->dofh_ident[DOF_ID_VERSION] != DOF_VERSION_3) {
dtrace_dof_error(dof, "DOF version mismatch");
return (-1);
}
-#endif
if (dof->dofh_ident[DOF_ID_DIFVERS] != DIF_VERSION_2) {
dtrace_dof_error(dof, "DOF uses unsupported instruction set");
}
}
-#if !defined(__APPLE__)
- /*
- * Take a second pass through the sections and locate and perform any
- * relocations that are present. We do this after the first pass to
- * be sure that all sections have had their headers validated.
- */
- for (i = 0; i < dof->dofh_secnum; i++) {
- dof_sec_t *sec = (dof_sec_t *)(daddr +
- (uintptr_t)dof->dofh_secoff + i * dof->dofh_secsize);
-
- if (!(sec->dofs_flags & DOF_SECF_LOAD))
- continue; /* skip sections that are not loadable */
-
- switch (sec->dofs_type) {
- case DOF_SECT_URELHDR:
- if (dtrace_dof_relocate(dof, sec, ubase) != 0)
- return (-1);
- break;
- }
- }
-#else
/*
- * APPLE NOTE: We have no relocation to perform. All dof values are
- * relative offsets.
+ * APPLE NOTE: We have no further relocation to perform.
+ * All dof values are relative offsets.
*/
-#endif /* __APPLE__ */
if ((enab = *enabp) == NULL)
enab = *enabp = dtrace_enabling_create(vstate);
if (sec->dofs_type != DOF_SECT_ECBDESC)
continue;
-#if !defined(__APPLE__)
- if ((ep = dtrace_dof_ecbdesc(dof, sec, vstate, cr)) == NULL) {
- dtrace_enabling_destroy(enab);
- *enabp = NULL;
- return (-1);
- }
-#else
- /* Note: Defend against gcc 4.0 botch on x86 (not all paths out of inlined dtrace_dof_ecbdesc
- are checked for the NULL return value.) */
+ /*
+ * APPLE NOTE: Defend against gcc 4.0 botch on x86.
+ * not all paths out of inlined dtrace_dof_ecbdesc
+ * are checked for the NULL return value.
+ * Check for NULL explicitly here.
+ */
ep = dtrace_dof_ecbdesc(dof, sec, vstate, cr);
if (ep == NULL) {
dtrace_enabling_destroy(enab);
*enabp = NULL;
return (-1);
}
-#endif /* __APPLE__ */
dtrace_enabling_add(enab, ep);
}
static int
dtrace_dof_options(dof_hdr_t *dof, dtrace_state_t *state)
{
-#if !defined(__APPLE__) /* Quiet compiler warnings */
- int i, rval;
-#else
uint_t i;
int rval;
-#endif /* __APPLE__ */
uint32_t entsize;
size_t offs;
dof_optdesc_t *desc;
return (EINVAL);
}
-#if !defined(__APPLE__) /* Quiet compiler warnings */
- if (desc->dofo_value == DTRACEOPT_UNSET) {
-#else
if (desc->dofo_value == (uint64_t)DTRACEOPT_UNSET) {
-#endif /* __APPLE __ */
dtrace_dof_error(dof, "unset option");
return (EINVAL);
}
/*
* DTrace Consumer State Functions
*/
-#if defined(__APPLE__) /* Quiet compiler warning. */
-static
-#endif /* __APPLE__ */
-int
+static int
dtrace_dstate_init(dtrace_dstate_t *dstate, size_t size)
{
size_t hashsize, maxper, min_size, chunksize = dstate->dtds_chunksize;
void *base;
uintptr_t limit;
dtrace_dynvar_t *dvar, *next, *start;
-#if !defined(__APPLE__) /* Quiet compiler warning */
- int i;
-#else
size_t i;
-#endif /* __APPLE__ */
lck_mtx_assert(&dtrace_lock, LCK_MTX_ASSERT_OWNED);
ASSERT(dstate->dtds_base == NULL && dstate->dtds_percpu == NULL);
if ((dstate->dtds_chunksize = chunksize) == 0)
dstate->dtds_chunksize = DTRACE_DYNVAR_CHUNKSIZE;
+ VERIFY(dstate->dtds_chunksize < (LONG_MAX - sizeof (dtrace_dynhash_t)));
+
if (size < (min_size = dstate->dtds_chunksize + sizeof (dtrace_dynhash_t)))
size = min_size;
((uintptr_t)base + hashsize * sizeof (dtrace_dynhash_t));
limit = (uintptr_t)base + size;
+ VERIFY((uintptr_t)start < limit);
+ VERIFY((uintptr_t)start >= (uintptr_t)base);
+
maxper = (limit - (uintptr_t)start) / (int)NCPU;
maxper = (maxper / dstate->dtds_chunksize) * dstate->dtds_chunksize;
start = (dtrace_dynvar_t *)limit;
}
- ASSERT(limit <= (uintptr_t)base + size);
+ VERIFY(limit <= (uintptr_t)base + size);
for (;;) {
next = (dtrace_dynvar_t *)((uintptr_t)dvar +
if ((uintptr_t)next + dstate->dtds_chunksize >= limit)
break;
+ VERIFY((uintptr_t)dvar >= (uintptr_t)base &&
+ (uintptr_t)dvar <= (uintptr_t)base + size);
dvar->dtdv_next = next;
dvar = next;
}
return (0);
}
-#if defined(__APPLE__) /* Quiet compiler warning. */
-static
-#endif /* __APPLE__ */
-void
+static void
dtrace_dstate_fini(dtrace_dstate_t *dstate)
{
lck_mtx_assert(&cpu_lock, LCK_MTX_ASSERT_OWNED);
state->dts_alive = now;
}
-#if !defined(__APPLE__)
-dtrace_state_t *
-dtrace_state_create(dev_t *devp, cred_t *cr)
-#else
static int
dtrace_state_create(dev_t *devp, cred_t *cr, dtrace_state_t **new_state)
-#endif /* __APPLE__ */
{
minor_t minor;
major_t major;
lck_mtx_assert(&dtrace_lock, LCK_MTX_ASSERT_OWNED);
lck_mtx_assert(&cpu_lock, LCK_MTX_ASSERT_OWNED);
-#if !defined(__APPLE__)
- minor = (minor_t)(uintptr_t)vmem_alloc(dtrace_minor, 1,
- VM_BESTFIT | VM_SLEEP);
-
- if (ddi_soft_state_zalloc(dtrace_softstate, minor) != DDI_SUCCESS) {
- vmem_free(dtrace_minor, (void *)(uintptr_t)minor, 1);
- return (NULL);
- }
-#else
/* Cause restart */
*new_state = NULL;
- /*
- * Darwin's DEVFS layer acquired the minor number for this "device" when it called
- * dtrace_devfs_clone_func(). At that time, dtrace_devfs_clone_func() proposed a minor number
- * (next unused according to vmem_alloc()) and then immediately put the number back in play
- * (by calling vmem_free()). Now that minor number is being used for an open, so committing it
- * to use. The following vmem_alloc() must deliver that same minor number. FIXME.
- */
+ minor = getminor(*devp);
- minor = (minor_t)(uintptr_t)vmem_alloc(dtrace_minor, 1,
- VM_BESTFIT | VM_SLEEP);
-
- if (NULL != devp) {
- ASSERT(getminor(*devp) == minor);
- if (getminor(*devp) != minor) {
- printf("dtrace_open: couldn't re-acquire vended minor number %d. Instead got %d\n",
- getminor(*devp), minor);
- vmem_free(dtrace_minor, (void *)(uintptr_t)minor, 1);
- return (ERESTART); /* can't reacquire */
- }
- } else {
- /* NULL==devp iff "Anonymous state" (see dtrace_anon_property),
- * so just vend the minor device number here de novo since no "open" has occurred. */
+ state = dtrace_state_allocate(minor);
+ if (NULL == state) {
+ printf("dtrace_open: couldn't acquire minor number %d. This usually means that too many DTrace clients are in use at the moment", minor);
+ return (ERESTART); /* can't reacquire */
}
- if (ddi_soft_state_zalloc(dtrace_softstate, minor) != DDI_SUCCESS) {
- vmem_free(dtrace_minor, (void *)(uintptr_t)minor, 1);
- return (EAGAIN); /* temporary resource shortage */
- }
-
-#endif /* __APPLE__ */
-
- state = ddi_get_soft_state(dtrace_softstate, minor);
state->dts_epid = DTRACE_EPIDNONE + 1;
(void) snprintf(c, sizeof (c), "dtrace_aggid_%d", minor);
*/
state->dts_buffer = kmem_zalloc(bufsize, KM_SLEEP);
state->dts_aggbuffer = kmem_zalloc(bufsize, KM_SLEEP);
+ state->dts_buf_over_limit = 0;
state->dts_cleaner = CYCLIC_NONE;
state->dts_deadman = CYCLIC_NONE;
state->dts_vstate.dtvs_state = state;
opt[DTRACEOPT_STATUSRATE] = dtrace_statusrate_default;
opt[DTRACEOPT_JSTACKFRAMES] = dtrace_jstackframes_default;
opt[DTRACEOPT_JSTACKSTRSIZE] = dtrace_jstackstrsize_default;
-
- state->dts_activity = DTRACE_ACTIVITY_INACTIVE;
+ opt[DTRACEOPT_BUFLIMIT] = dtrace_buflimit_default;
/*
* Depending on the user credentials, we set flag bits which alter probe
* actual anonymous tracing, or the possession of all privileges, all of
* the normal checks are bypassed.
*/
+#if defined(__APPLE__)
+ if (cr == NULL || PRIV_POLICY_ONLY(cr, PRIV_ALL, B_FALSE)) {
+ if (dtrace_is_restricted() && !dtrace_are_restrictions_relaxed()) {
+ /*
+ * Allow only proc credentials when DTrace is
+ * restricted by the current security policy
+ */
+ state->dts_cred.dcr_visible = DTRACE_CRV_ALLPROC;
+ state->dts_cred.dcr_action = DTRACE_CRA_PROC | DTRACE_CRA_PROC_CONTROL | DTRACE_CRA_PROC_DESTRUCTIVE_ALLUSER;
+ }
+ else {
+ state->dts_cred.dcr_visible = DTRACE_CRV_ALL;
+ state->dts_cred.dcr_action = DTRACE_CRA_ALL;
+ }
+ }
+
+#else
if (cr == NULL || PRIV_POLICY_ONLY(cr, PRIV_ALL, B_FALSE)) {
state->dts_cred.dcr_visible = DTRACE_CRV_ALL;
state->dts_cred.dcr_action = DTRACE_CRA_ALL;
- } else {
+ }
+ else {
/*
* Set up the credentials for this instantiation. We take a
* hold on the credential to prevent it from disappearing on
* If we have all privs in whatever zone this is,
* we can do destructive things to processes which
* have altered credentials.
+ *
+ * APPLE NOTE: Darwin doesn't do zones.
+ * Behave as if zone always has destructive privs.
*/
-#if !defined(__APPLE__)
- if (priv_isequalset(priv_getset(cr, PRIV_EFFECTIVE),
- cr->cr_zone->zone_privset)) {
- state->dts_cred.dcr_action |=
- DTRACE_CRA_PROC_DESTRUCTIVE_CREDCHG;
- }
-#else
- /* Darwin doesn't do zones. */
+
state->dts_cred.dcr_action |=
DTRACE_CRA_PROC_DESTRUCTIVE_CREDCHG;
-#endif /* __APPLE__ */
}
/*
* If we have all privs in whatever zone this is,
* we can do destructive things to processes which
* have altered credentials.
- */
-#if !defined(__APPLE__)
- if (priv_isequalset(priv_getset(cr, PRIV_EFFECTIVE),
- cr->cr_zone->zone_privset)) {
- state->dts_cred.dcr_action |=
- DTRACE_CRA_PROC_DESTRUCTIVE_CREDCHG;
- }
-#else
- /* Darwin doesn't do zones. */
+ *
+ * APPLE NOTE: Darwin doesn't do zones.
+ * Behave as if zone always has destructive privs.
+ */
state->dts_cred.dcr_action |=
DTRACE_CRA_PROC_DESTRUCTIVE_CREDCHG;
-#endif /* __APPLE__ */
}
/*
DTRACE_CRA_PROC_DESTRUCTIVE_ALLZONE;
}
}
+#endif
-#if !defined(__APPLE__)
- return (state);
-#else
*new_state = state;
return(0); /* Success */
-#endif /* __APPLE__ */
}
static int
{
dtrace_optval_t *opt = state->dts_options, size;
processorid_t cpu = 0;
+ size_t limit = buf->dtb_size;
int flags = 0, rval;
lck_mtx_assert(&dtrace_lock, LCK_MTX_ASSERT_OWNED);
flags |= DTRACEBUF_INACTIVE;
}
-#if !defined(__APPLE__) /* Quiet compiler warning */
- for (size = opt[which]; size >= sizeof (uint64_t); size >>= 1) {
-#else
for (size = opt[which]; (size_t)size >= sizeof (uint64_t); size >>= 1) {
-#endif /* __APPLE__ */
/*
* The size must be 8-byte aligned. If the size is not 8-byte
* aligned, drop it down by the difference.
*/
return (E2BIG);
}
-
- rval = dtrace_buffer_alloc(buf, size, flags, cpu);
+ limit = opt[DTRACEOPT_BUFLIMIT] * size / 100;
+ rval = dtrace_buffer_alloc(buf, limit, size, flags, cpu);
if (rval != ENOMEM) {
opt[which] = size;
* If we have an aggregation buffer, we must also have
* a buffer to use as scratch.
*/
-#if !defined(__APPLE__) /* Quiet compiler warning */
- if (opt[DTRACEOPT_BUFSIZE] == DTRACEOPT_UNSET ||
- opt[DTRACEOPT_BUFSIZE] < state->dts_needed) {
- opt[DTRACEOPT_BUFSIZE] = state->dts_needed;
- }
-#else
if (opt[DTRACEOPT_BUFSIZE] == DTRACEOPT_UNSET ||
(size_t)opt[DTRACEOPT_BUFSIZE] < state->dts_needed) {
opt[DTRACEOPT_BUFSIZE] = state->dts_needed;
}
-#endif /* __APPLE__ */
}
}
if (opt[DTRACEOPT_CLEANRATE] > dtrace_cleanrate_max)
opt[DTRACEOPT_CLEANRATE] = dtrace_cleanrate_max;
+ if (opt[DTRACEOPT_STRSIZE] > dtrace_strsize_max)
+ opt[DTRACEOPT_STRSIZE] = dtrace_strsize_max;
+
+ if (opt[DTRACEOPT_STRSIZE] < dtrace_strsize_min)
+ opt[DTRACEOPT_STRSIZE] = dtrace_strsize_min;
+
+ if (opt[DTRACEOPT_BUFLIMIT] > dtrace_buflimit_max)
+ opt[DTRACEOPT_BUFLIMIT] = dtrace_buflimit_max;
+
+ if (opt[DTRACEOPT_BUFLIMIT] < dtrace_buflimit_min)
+ opt[DTRACEOPT_BUFLIMIT] = dtrace_buflimit_min;
+
hdlr.cyh_func = (cyc_func_t)dtrace_state_clean;
hdlr.cyh_arg = state;
hdlr.cyh_level = CY_LOW_LEVEL;
switch (option) {
case DTRACEOPT_DESTRUCTIVE:
- if (dtrace_destructive_disallow)
+ /*
+ * Prevent consumers from enabling destructive actions if DTrace
+ * is running in a restricted environment, or if actions are
+ * disallowed.
+ */
+ if (dtrace_is_restricted() || dtrace_destructive_disallow)
return (EACCES);
state->dts_cred.dcr_destructive = 1;
dtrace_format_destroy(state);
vmem_destroy(state->dts_aggid_arena);
- ddi_soft_state_free(dtrace_softstate, minor);
- vmem_free(dtrace_minor, (void *)(uintptr_t)minor, 1);
+ dtrace_state_free(minor);
}
/*
* If we haven't allocated an anonymous state, we'll do so now.
*/
if ((state = dtrace_anon.dta_state) == NULL) {
-#if !defined(__APPLE__)
- state = dtrace_state_create(NULL, NULL);
- dtrace_anon.dta_state = state;
- if (state == NULL) {
-#else
rv = dtrace_state_create(NULL, NULL, &state);
dtrace_anon.dta_state = state;
if (rv != 0 || state == NULL) {
-#endif /* __APPLE__ */
/*
* This basically shouldn't happen: the only
* failure mode from dtrace_state_create() is a
dtrace_helper_trace(dtrace_helper_action_t *helper,
dtrace_mstate_t *mstate, dtrace_vstate_t *vstate, int where)
{
-#if !defined(__APPLE__) /* Quiet compiler warning */
- uint32_t size, next, nnext, i;
-#else
uint32_t size, next, nnext;
int i;
-#endif /* __APPLE__ */
dtrace_helptrace_t *ent;
uint16_t flags = cpu_core[CPU->cpu_id].cpuc_dtrace_flags;
if (!dtrace_helptrace_enabled)
return;
-#if !defined(__APPLE__) /* Quiet compiler warning */
- ASSERT(vstate->dtvs_nlocals <= dtrace_helptrace_nlocals);
-#else
ASSERT((uint32_t)vstate->dtvs_nlocals <= dtrace_helptrace_nlocals);
-#endif /* __APPLE__ */
/*
* What would a tracing framework be without its own tracing
mstate->dtms_arg[0] = sarg0;
mstate->dtms_arg[1] = sarg1;
- return (NULL);
+ return (0);
}
static void
kmem_free(helper, sizeof (dtrace_helper_action_t));
}
-#if !defined(__APPLE__)
-static int
-dtrace_helper_destroygen(int gen)
-{
- proc_t *p = curproc;
-#else
static int
dtrace_helper_destroygen(proc_t* p, int gen)
{
-#endif
dtrace_helpers_t *help = p->p_dtrace_helpers;
dtrace_vstate_t *vstate;
-#if !defined(__APPLE__) /* Quiet compiler warning */
- int i;
-#else
uint_t i;
-#endif /* __APPLE__ */
lck_mtx_assert(&dtrace_lock, LCK_MTX_ASSERT_OWNED);
if (dtrace_meta_pid != NULL) {
ASSERT(dtrace_deferred_pid == NULL);
dtrace_helper_provider_remove(&prov->dthp_prov,
- p->p_pid);
+ p);
}
lck_mtx_unlock(&dtrace_meta_lock);
return (err == 0);
}
-#if !defined(__APPLE__)
-static int
-dtrace_helper_action_add(int which, dtrace_ecbdesc_t *ep)
-#else
static int
dtrace_helper_action_add(proc_t* p, int which, dtrace_ecbdesc_t *ep)
-#endif
{
dtrace_helpers_t *help;
dtrace_helper_action_t *helper, *last;
if (which < 0 || which >= DTRACE_NHELPER_ACTIONS)
return (EINVAL);
-#if !defined(__APPLE__)
- help = curproc->p_dtrace_helpers;
-#else
help = p->p_dtrace_helpers;
-#endif
last = help->dthps_actions[which];
vstate = &help->dthps_vstate;
last->dtha_next = helper;
}
-#if !defined(__APPLE__) /* Quiet compiler warning */
- if (vstate->dtvs_nlocals > dtrace_helptrace_nlocals) {
-#else
if ((uint32_t)vstate->dtvs_nlocals > dtrace_helptrace_nlocals) {
-#endif /* __APPLE__ */
dtrace_helptrace_nlocals = vstate->dtvs_nlocals;
dtrace_helptrace_next = 0;
}
lck_mtx_unlock(&dtrace_lock);
- dtrace_helper_provide(dofhp, p->p_pid);
+ dtrace_helper_provide(dofhp, p);
} else {
/*
* off to the meta provider.
*/
-#if !defined(__APPLE__) /* Quiet compiler warning */
- int i;
-#else
uint_t i;
-#endif /* __APPLE__ */
lck_mtx_unlock(&dtrace_lock);
for (i = 0; i < help->dthps_nprovs; i++) {
dtrace_helper_provide(&help->dthps_provs[i]->dthp_prov,
- p->p_pid);
+ p);
}
}
lck_mtx_unlock(&dtrace_meta_lock);
}
-#if !defined(__APPLE__)
-static int
-dtrace_helper_provider_add(dof_helper_t *dofhp, int gen)
-#else
static int
dtrace_helper_provider_add(proc_t* p, dof_helper_t *dofhp, int gen)
-#endif
{
dtrace_helpers_t *help;
dtrace_helper_provider_t *hprov, **tmp_provs;
uint_t tmp_maxprovs, i;
lck_mtx_assert(&dtrace_lock, LCK_MTX_ASSERT_OWNED);
-
-#if !defined(__APPLE__)
- help = curproc->p_dtrace_helpers;
-#else
help = p->p_dtrace_helpers;
-#endif
ASSERT(help != NULL);
/*
return (0);
}
-#if !defined(__APPLE__)
-static int
-dtrace_helper_slurp(dof_hdr_t *dof, dof_helper_t *dhp)
-#else
static int
dtrace_helper_slurp(proc_t* p, dof_hdr_t *dof, dof_helper_t *dhp)
-#endif
{
dtrace_helpers_t *help;
dtrace_vstate_t *vstate;
lck_mtx_assert(&dtrace_lock, LCK_MTX_ASSERT_OWNED);
-#if !defined(__APPLE__)
- if ((help = curproc->p_dtrace_helpers) == NULL)
- help = dtrace_helpers_create(curproc);
-#else
if ((help = p->p_dtrace_helpers) == NULL)
help = dtrace_helpers_create(p);
-#endif
vstate = &help->dthps_vstate;
* Look for helper providers and validate their descriptions.
*/
if (dhp != NULL) {
-#if !defined(__APPLE__) /* Quiet compiler warning */
- for (i = 0; i < dof->dofh_secnum; i++) {
-#else
for (i = 0; (uint32_t)i < dof->dofh_secnum; i++) {
-#endif /* __APPLE__ */
dof_sec_t *sec = (dof_sec_t *)(uintptr_t)(daddr +
dof->dofh_secoff + i * dof->dofh_secsize);
dtrace_ecbdesc_t *ep = enab->dten_desc[i];
dtrace_probedesc_t *desc = &ep->dted_probe;
-#if !defined(__APPLE__)
- if (strcmp(desc->dtpd_provider, "dtrace") != 0)
- continue;
-
- if (strcmp(desc->dtpd_mod, "helper") != 0)
- continue;
-
- if (strcmp(desc->dtpd_func, "ustack") != 0)
- continue;
-#else /* Employ size bounded string operation. */
+ /* APPLE NOTE: Darwin employs size bounded string operation. */
if (!LIT_STRNEQL(desc->dtpd_provider, "dtrace"))
continue;
if (!LIT_STRNEQL(desc->dtpd_func, "ustack"))
continue;
-#endif /* __APPLE__ */
-#if !defined(__APPLE__)
- if ((rv = dtrace_helper_action_add(DTRACE_HELPER_ACTION_USTACK,
- ep)) != 0) {
-#else
if ((rv = dtrace_helper_action_add(p, DTRACE_HELPER_ACTION_USTACK,
ep)) != 0) {
-#endif
/*
* Adding this helper action failed -- we are now going
* to rip out the entire generation and return failure.
*/
-#if !defined(__APPLE__)
- (void) dtrace_helper_destroygen(help->dthps_generation);
-#else
(void) dtrace_helper_destroygen(p, help->dthps_generation);
-#endif
dtrace_enabling_destroy(enab);
dtrace_dof_destroy(dof);
return (-1);
if (dhp != NULL && nprovs > 0) {
dhp->dofhp_dof = (uint64_t)(uintptr_t)dof;
-#if !defined(__APPLE__)
- if (dtrace_helper_provider_add(dhp, gen) == 0) {
-#else
if (dtrace_helper_provider_add(p, dhp, gen) == 0) {
-#endif
lck_mtx_unlock(&dtrace_lock);
-#if !defined(__APPLE__)
- dtrace_helper_provider_register(curproc, help, dhp);
-#else
dtrace_helper_provider_register(p, help, dhp);
-#endif
lck_mtx_lock(&dtrace_lock);
destroy = 0;
return (gen);
}
-#if defined(__APPLE__)
-
/*
- * DTrace lazy dof
+ * APPLE NOTE: DTrace lazy dof implementation
*
* DTrace user static probes (USDT probes) and helper actions are loaded
* in a process by proccessing dof sections. The dof sections are passed
lck_rw_lock_shared(&dtrace_dof_mode_lock);
- /*
- * If we have lazy dof, dof mode better be LAZY_ON.
- */
- ASSERT(p->p_dtrace_lazy_dofs == NULL || dtrace_dof_mode == DTRACE_DOF_MODE_LAZY_ON);
ASSERT(p->p_dtrace_lazy_dofs == NULL || p->p_dtrace_helpers == NULL);
ASSERT(dtrace_dof_mode != DTRACE_DOF_MODE_NEVER);
lck_rw_lock_shared(&dtrace_dof_mode_lock);
- /*
- * If we have lazy dof, dof mode better be LAZY_ON.
- */
- ASSERT(p->p_dtrace_lazy_dofs == NULL || dtrace_dof_mode == DTRACE_DOF_MODE_LAZY_ON);
ASSERT(p->p_dtrace_lazy_dofs == NULL || p->p_dtrace_helpers == NULL);
ASSERT(dtrace_dof_mode != DTRACE_DOF_MODE_NEVER);
}
lck_rw_unlock_shared(&dtrace_dof_mode_lock);
-
+
return rval;
}
lck_rw_lock_shared(&dtrace_dof_mode_lock);
lck_mtx_lock(&p->p_dtrace_sprlock);
- /*
- * If we have lazy dof, dof mode better be LAZY_ON, or we must be exiting.
- * We cannot assert against DTRACE_DOF_MODE_NEVER here, because we are called from
- * kern_exit.c and kern_exec.c.
- */
- ASSERT(p->p_dtrace_lazy_dofs == NULL || dtrace_dof_mode == DTRACE_DOF_MODE_LAZY_ON || p->p_lflag & P_LEXIT);
ASSERT(p->p_dtrace_lazy_dofs == NULL || p->p_dtrace_helpers == NULL);
dof_ioctl_data_t* lazy_dofs = p->p_dtrace_lazy_dofs;
}
}
-void
-dtrace_lazy_dofs_duplicate(proc_t *parent, proc_t *child)
+static int
+dtrace_lazy_dofs_proc_iterate_filter(proc_t *p, void* ignored)
{
- lck_mtx_assert(&dtrace_lock, LCK_MTX_ASSERT_NOTOWNED);
- lck_mtx_assert(&parent->p_dtrace_sprlock, LCK_MTX_ASSERT_NOTOWNED);
- lck_mtx_assert(&child->p_dtrace_sprlock, LCK_MTX_ASSERT_NOTOWNED);
-
- lck_rw_lock_shared(&dtrace_dof_mode_lock);
- lck_mtx_lock(&parent->p_dtrace_sprlock);
-
+#pragma unused(ignored)
/*
- * If we have lazy dof, dof mode better be LAZY_ON, or we must be exiting.
- * We cannot assert against DTRACE_DOF_MODE_NEVER here, because we are called from
- * kern_fork.c
+ * Okay to NULL test without taking the sprlock.
*/
- ASSERT(parent->p_dtrace_lazy_dofs == NULL || dtrace_dof_mode == DTRACE_DOF_MODE_LAZY_ON);
- ASSERT(parent->p_dtrace_lazy_dofs == NULL || parent->p_dtrace_helpers == NULL);
- /*
- * In theory we should hold the child sprlock, but this is safe...
- */
- ASSERT(child->p_dtrace_lazy_dofs == NULL && child->p_dtrace_helpers == NULL);
-
- dof_ioctl_data_t* parent_dofs = parent->p_dtrace_lazy_dofs;
- dof_ioctl_data_t* child_dofs = NULL;
- if (parent_dofs) {
- size_t parent_dofs_size = DOF_IOCTL_DATA_T_SIZE(parent_dofs->dofiod_count);
- child_dofs = kmem_alloc(parent_dofs_size, KM_SLEEP);
- bcopy(parent_dofs, child_dofs, parent_dofs_size);
- }
-
- lck_mtx_unlock(&parent->p_dtrace_sprlock);
-
- if (child_dofs) {
- lck_mtx_lock(&child->p_dtrace_sprlock);
- child->p_dtrace_lazy_dofs = child_dofs;
- lck_mtx_unlock(&child->p_dtrace_sprlock);
- }
-
- lck_rw_unlock_shared(&dtrace_dof_mode_lock);
-}
-
-static int
-dtrace_lazy_dofs_proc_iterate_filter(proc_t *p, void* ignored)
-{
-#pragma unused(ignored)
- /*
- * Okay to NULL test without taking the sprlock.
- */
- return p->p_dtrace_lazy_dofs != NULL;
-}
-
-static int
-dtrace_lazy_dofs_proc_iterate_doit(proc_t *p, void* ignored)
-{
-#pragma unused(ignored)
+ return p->p_dtrace_lazy_dofs != NULL;
+}
+
+static void
+dtrace_lazy_dofs_process(proc_t *p) {
/*
* It is possible this process may exit during our attempt to
* fault in the dof. We could fix this by holding locks longer,
*/
lck_mtx_lock(&p->p_dtrace_sprlock);
- /*
- * In this case only, it is okay to have lazy dof when dof mode is DTRACE_DOF_MODE_LAZY_OFF
- */
+
ASSERT(p->p_dtrace_lazy_dofs == NULL || p->p_dtrace_helpers == NULL);
ASSERT(dtrace_dof_mode == DTRACE_DOF_MODE_LAZY_OFF);
-
dof_ioctl_data_t* lazy_dofs = p->p_dtrace_lazy_dofs;
p->p_dtrace_lazy_dofs = NULL;
dhp->dofhp_dof = dhp->dofhp_addr;
dof_hdr_t *dof = dtrace_dof_copyin_from_proc(p, dhp->dofhp_dof, &rval);
-
+
if (dof != NULL) {
dtrace_helpers_t *help;
kmem_free(lazy_dofs, DOF_IOCTL_DATA_T_SIZE(lazy_dofs->dofiod_count));
}
+}
+
+static int
+dtrace_lazy_dofs_proc_iterate_doit(proc_t *p, void* ignored)
+{
+#pragma unused(ignored)
+
+ dtrace_lazy_dofs_process(p);
return PROC_RETURNED;
}
-#endif /* __APPLE__ */
+#define DTRACE_LAZY_DOFS_DUPLICATED 1
+
+static int
+dtrace_lazy_dofs_duplicate(proc_t *parent, proc_t *child)
+{
+ lck_mtx_assert(&dtrace_lock, LCK_MTX_ASSERT_NOTOWNED);
+ lck_mtx_assert(&parent->p_dtrace_sprlock, LCK_MTX_ASSERT_NOTOWNED);
+ lck_mtx_assert(&child->p_dtrace_sprlock, LCK_MTX_ASSERT_NOTOWNED);
+
+ lck_rw_lock_shared(&dtrace_dof_mode_lock);
+ lck_mtx_lock(&parent->p_dtrace_sprlock);
+
+ /*
+ * We need to make sure that the transition to lazy dofs -> helpers
+ * was atomic for our parent
+ */
+ ASSERT(parent->p_dtrace_lazy_dofs == NULL || parent->p_dtrace_helpers == NULL);
+ /*
+ * In theory we should hold the child sprlock, but this is safe...
+ */
+ ASSERT(child->p_dtrace_lazy_dofs == NULL && child->p_dtrace_helpers == NULL);
+
+ dof_ioctl_data_t* parent_dofs = parent->p_dtrace_lazy_dofs;
+ dof_ioctl_data_t* child_dofs = NULL;
+ if (parent_dofs) {
+ size_t parent_dofs_size = DOF_IOCTL_DATA_T_SIZE(parent_dofs->dofiod_count);
+ child_dofs = kmem_alloc(parent_dofs_size, KM_SLEEP);
+ bcopy(parent_dofs, child_dofs, parent_dofs_size);
+ }
+
+ lck_mtx_unlock(&parent->p_dtrace_sprlock);
+
+ if (child_dofs) {
+ lck_mtx_lock(&child->p_dtrace_sprlock);
+ child->p_dtrace_lazy_dofs = child_dofs;
+ lck_mtx_unlock(&child->p_dtrace_sprlock);
+ /**
+ * We process the DOF at this point if the mode is set to
+ * LAZY_OFF. This can happen if DTrace is still processing the
+ * DOF of other process (which can happen because the
+ * protected pager can have a huge latency)
+ * but has not processed our parent yet
+ */
+ if (dtrace_dof_mode == DTRACE_DOF_MODE_LAZY_OFF) {
+ dtrace_lazy_dofs_process(child);
+ }
+ lck_rw_unlock_shared(&dtrace_dof_mode_lock);
+
+ return DTRACE_LAZY_DOFS_DUPLICATED;
+ }
+ lck_rw_unlock_shared(&dtrace_dof_mode_lock);
+
+ return 0;
+}
static dtrace_helpers_t *
dtrace_helpers_create(proc_t *p)
return (help);
}
-#if !defined(__APPLE__)
-static void
-dtrace_helpers_destroy(void)
-{
- dtrace_helpers_t *help;
- dtrace_vstate_t *vstate;
- proc_t *p = curproc;
- int i;
-#else
static void
dtrace_helpers_destroy(proc_t* p)
{
dtrace_helpers_t *help;
dtrace_vstate_t *vstate;
uint_t i;
-#endif
lck_mtx_lock(&dtrace_lock);
for (i = 0; i < help->dthps_nprovs; i++) {
dtrace_helper_provider_remove(
- &help->dthps_provs[i]->dthp_prov, p->p_pid);
+ &help->dthps_provs[i]->dthp_prov, p);
}
} else {
lck_mtx_lock(&dtrace_lock);
dtrace_helper_action_t *helper, *new, *last;
dtrace_difo_t *dp;
dtrace_vstate_t *vstate;
-#if !defined(__APPLE__) /* Quiet compiler warning */
- int i, j, sz, hasprovs = 0;
-#else
uint_t i;
int j, sz, hasprovs = 0;
-#endif /* __APPLE__ */
lck_mtx_lock(&dtrace_lock);
ASSERT(from->p_dtrace_helpers != NULL);
sz = sizeof (dtrace_difo_t *) * new->dtha_nactions;
new->dtha_actions = kmem_alloc(sz, KM_SLEEP);
-#if !defined(__APPLE__) /* Quiet compiler warning */
- for (j = 0; j < new->dtha_nactions; j++) {
- dtrace_difo_t *dp = helper->dtha_actions[j];
-
- ASSERT(dp != NULL);
- dp = dtrace_difo_duplicate(dp, vstate);
- new->dtha_actions[j] = dp;
- }
-#else
for (j = 0; j < new->dtha_nactions; j++) {
dtrace_difo_t *dpj = helper->dtha_actions[j];
dpj = dtrace_difo_duplicate(dpj, vstate);
new->dtha_actions[j] = dpj;
}
-#endif /* __APPLE__ */
if (last != NULL) {
last->dtha_next = new;
dtrace_helper_provider_register(to, newhelp, NULL);
}
+/**
+ * DTrace Process functions
+ */
+
+void
+dtrace_proc_fork(proc_t *parent_proc, proc_t *child_proc, int spawn)
+{
+ /*
+ * This code applies to new processes who are copying the task
+ * and thread state and address spaces of their parent process.
+ */
+ if (!spawn) {
+ /*
+ * APPLE NOTE: Solaris does a sprlock() and drops the
+ * proc_lock here. We're cheating a bit and only taking
+ * the p_dtrace_sprlock lock. A full sprlock would
+ * task_suspend the parent.
+ */
+ lck_mtx_lock(&parent_proc->p_dtrace_sprlock);
+
+ /*
+ * Remove all DTrace tracepoints from the child process. We
+ * need to do this _before_ duplicating USDT providers since
+ * any associated probes may be immediately enabled.
+ */
+ if (parent_proc->p_dtrace_count > 0) {
+ dtrace_fasttrap_fork(parent_proc, child_proc);
+ }
+
+ lck_mtx_unlock(&parent_proc->p_dtrace_sprlock);
+
+ /*
+ * Duplicate any lazy dof(s). This must be done while NOT
+ * holding the parent sprlock! Lock ordering is
+ * dtrace_dof_mode_lock, then sprlock. It is imperative we
+ * always call dtrace_lazy_dofs_duplicate, rather than null
+ * check and call if !NULL. If we NULL test, during lazy dof
+ * faulting we can race with the faulting code and proceed
+ * from here to beyond the helpers copy. The lazy dof
+ * faulting will then fail to copy the helpers to the child
+ * process. We return if we duplicated lazy dofs as a process
+ * can only have one at the same time to avoid a race between
+ * a dtrace client and dtrace_proc_fork where a process would
+ * end up with both lazy dofs and helpers.
+ */
+ if (dtrace_lazy_dofs_duplicate(parent_proc, child_proc) == DTRACE_LAZY_DOFS_DUPLICATED) {
+ return;
+ }
+
+ /*
+ * Duplicate any helper actions and providers if they haven't
+ * already.
+ */
+#if !defined(__APPLE__)
+ /*
+ * The SFORKING
+ * we set above informs the code to enable USDT probes that
+ * sprlock() may fail because the child is being forked.
+ */
+#endif
+ /*
+ * APPLE NOTE: As best I can tell, Apple's sprlock() equivalent
+ * never fails to find the child. We do not set SFORKING.
+ */
+ if (parent_proc->p_dtrace_helpers != NULL && dtrace_helpers_fork) {
+ (*dtrace_helpers_fork)(parent_proc, child_proc);
+ }
+ }
+}
+
+void
+dtrace_proc_exec(proc_t *p)
+{
+ /*
+ * Invalidate any predicate evaluation already cached for this thread by DTrace.
+ * That's because we've just stored to p_comm and DTrace refers to that when it
+ * evaluates the "execname" special variable. uid and gid may have changed as well.
+ */
+ dtrace_set_thread_predcache(current_thread(), 0);
+
+ /*
+ * Free any outstanding lazy dof entries. It is imperative we
+ * always call dtrace_lazy_dofs_destroy, rather than null check
+ * and call if !NULL. If we NULL test, during lazy dof faulting
+ * we can race with the faulting code and proceed from here to
+ * beyond the helpers cleanup. The lazy dof faulting will then
+ * install new helpers which no longer belong to this process!
+ */
+ dtrace_lazy_dofs_destroy(p);
+
+
+ /*
+ * Clean up any DTrace helpers for the process.
+ */
+ if (p->p_dtrace_helpers != NULL && dtrace_helpers_cleanup) {
+ (*dtrace_helpers_cleanup)(p);
+ }
+
+ /*
+ * Cleanup the DTrace provider associated with this process.
+ */
+ proc_lock(p);
+ if (p->p_dtrace_probes && dtrace_fasttrap_exec_ptr) {
+ (*dtrace_fasttrap_exec_ptr)(p);
+ }
+ proc_unlock(p);
+}
+
+void
+dtrace_proc_exit(proc_t *p)
+{
+ /*
+ * Free any outstanding lazy dof entries. It is imperative we
+ * always call dtrace_lazy_dofs_destroy, rather than null check
+ * and call if !NULL. If we NULL test, during lazy dof faulting
+ * we can race with the faulting code and proceed from here to
+ * beyond the helpers cleanup. The lazy dof faulting will then
+ * install new helpers which will never be cleaned up, and leak.
+ */
+ dtrace_lazy_dofs_destroy(p);
+
+ /*
+ * Clean up any DTrace helper actions or probes for the process.
+ */
+ if (p->p_dtrace_helpers != NULL) {
+ (*dtrace_helpers_cleanup)(p);
+ }
+
+ /*
+ * Clean up any DTrace probes associated with this process.
+ */
+ /*
+ * APPLE NOTE: We release ptss pages/entries in dtrace_fasttrap_exit_ptr(),
+ * call this after dtrace_helpers_cleanup()
+ */
+ proc_lock(p);
+ if (p->p_dtrace_probes && dtrace_fasttrap_exit_ptr) {
+ (*dtrace_fasttrap_exit_ptr)(p);
+ }
+ proc_unlock(p);
+}
+
/*
* DTrace Hook Functions
*/
-#if defined(__APPLE__)
/*
- * Routines to manipulate the modctl list within dtrace
+ * APPLE NOTE: dtrace_modctl_* routines for kext support.
+ * Used to manipulate the modctl list within dtrace xnu.
*/
modctl_t *dtrace_modctl_list;
kmem_free (ctl, sizeof(modctl_t));
}
-#endif /* __APPLE__ */
-
/*
* APPLE NOTE: The kext loader will call dtrace_module_loaded
* when the kext is loaded in memory, but before calling the
* Return -1 on failure
*/
-#if !defined (__APPLE__)
-static void
-dtrace_module_loaded(struct modctl *ctl)
-#else
static int
dtrace_module_loaded(struct kmod_info *kmod, uint32_t flag)
-#endif /* __APPLE__ */
{
dtrace_provider_t *prv;
-#if !defined(__APPLE__)
- mutex_enter(&dtrace_provider_lock);
- mutex_enter(&mod_lock);
-
- ASSERT(ctl->mod_busy);
-#else
-
/*
* If kernel symbols have been disabled, return immediately
* DTRACE_KERNEL_SYMBOLS_NEVER is a permanent mode, it is safe to test without holding locks
ctl->mod_flags |= MODCTL_HAS_KERNEL_SYMBOLS;
lck_mtx_unlock(&dtrace_lock);
-#endif /* __APPLE__ */
/*
* We're going to call each providers per-module provide operation
for (prv = dtrace_provider; prv != NULL; prv = prv->dtpv_next)
prv->dtpv_pops.dtps_provide_module(prv->dtpv_arg, ctl);
-#if defined(__APPLE__)
/*
- * The contract with the kext loader is that once this function has completed,
- * it may delete kernel symbols at will. We must set this while still holding
- * the mod_lock.
+ * APPLE NOTE: The contract with the kext loader is that once this function
+ * has completed, it may delete kernel symbols at will.
+ * We must set this while still holding the mod_lock.
*/
ctl->mod_flags &= ~MODCTL_HAS_KERNEL_SYMBOLS;
-#endif
lck_mtx_unlock(&mod_lock);
lck_mtx_unlock(&dtrace_provider_lock);
if (dtrace_retained == NULL) {
lck_mtx_unlock(&dtrace_lock);
-#if !defined(__APPLE__)
- return;
-#else
return 0;
-#endif
}
-#if !defined(__APPLE__)
- (void) taskq_dispatch(dtrace_taskq,
- (task_func_t *)dtrace_enabling_matchall, NULL, TQ_SLEEP);
-
- mutex_exit(&dtrace_lock);
-
- /*
- * And now, for a little heuristic sleaze: in general, we want to
- * match modules as soon as they load. However, we cannot guarantee
- * this, because it would lead us to the lock ordering violation
- * outlined above. The common case, of course, is that cpu_lock is
- * _not_ held -- so we delay here for a clock tick, hoping that that's
- * long enough for the task queue to do its work. If it's not, it's
- * not a serious problem -- it just means that the module that we
- * just loaded may not be immediately instrumentable.
- */
- delay(1);
-#else
/* APPLE NOTE!
*
* The cpu_lock mentioned above is only held by dtrace code, Apple's xnu never actually
dtrace_enabling_matchall();
return 0;
-#endif /* __APPLE__ */
}
-
-#if !defined(__APPLE__)
-static void
-dtrace_module_unloaded(struct modctl *ctl)
+
+/*
+ * Return 0 on success
+ * Return -1 on failure
+ */
+static int
+dtrace_module_unloaded(struct kmod_info *kmod)
{
dtrace_probe_t template, *probe, *first, *next;
dtrace_provider_t *prov;
+ struct modctl *ctl = NULL;
+ struct modctl *syncctl = NULL;
+ struct modctl *nextsyncctl = NULL;
+ int syncmode = 0;
+
+ lck_mtx_lock(&dtrace_provider_lock);
+ lck_mtx_lock(&mod_lock);
+ lck_mtx_lock(&dtrace_lock);
- template.dtpr_mod = ctl->mod_modname;
-
- mutex_enter(&dtrace_provider_lock);
- mutex_enter(&mod_lock);
- mutex_enter(&dtrace_lock);
-
+ if (kmod == NULL) {
+ syncmode = 1;
+ }
+ else {
+ ctl = dtrace_modctl_lookup(kmod);
+ if (ctl == NULL)
+ {
+ lck_mtx_unlock(&dtrace_lock);
+ lck_mtx_unlock(&mod_lock);
+ lck_mtx_unlock(&dtrace_provider_lock);
+ return (-1);
+ }
+ ctl->mod_loaded = 0;
+ ctl->mod_address = 0;
+ ctl->mod_size = 0;
+ }
+
if (dtrace_bymod == NULL) {
/*
* The DTrace module is loaded (obviously) but not attached;
* we don't have any work to do.
*/
- mutex_exit(&dtrace_provider_lock);
- mutex_exit(&mod_lock);
- mutex_exit(&dtrace_lock);
- return;
+ if (ctl != NULL)
+ (void)dtrace_modctl_remove(ctl);
+ lck_mtx_unlock(&dtrace_lock);
+ lck_mtx_unlock(&mod_lock);
+ lck_mtx_unlock(&dtrace_provider_lock);
+ return(0);
}
- for (probe = first = dtrace_hash_lookup(dtrace_bymod, &template);
- probe != NULL; probe = probe->dtpr_nextmod) {
- if (probe->dtpr_ecb != NULL) {
- mutex_exit(&dtrace_provider_lock);
- mutex_exit(&mod_lock);
- mutex_exit(&dtrace_lock);
-
- /*
- * This shouldn't _actually_ be possible -- we're
- * unloading a module that has an enabled probe in it.
- * (It's normally up to the provider to make sure that
- * this can't happen.) However, because dtps_enable()
- * doesn't have a failure mode, there can be an
- * enable/unload race. Upshot: we don't want to
- * assert, but we're not going to disable the
- * probe, either.
- */
- if (dtrace_err_verbose) {
- cmn_err(CE_WARN, "unloaded module '%s' had "
- "enabled probes", ctl->mod_modname);
- }
-
- return;
- }
- }
-
- probe = first;
-
- for (first = NULL; probe != NULL; probe = next) {
- ASSERT(dtrace_probes[probe->dtpr_id - 1] == probe);
-
- dtrace_probes[probe->dtpr_id - 1] = NULL;
- probe->dtpr_provider->probe_count--;
-
- next = probe->dtpr_nextmod;
- dtrace_hash_remove(dtrace_bymod, probe);
- dtrace_hash_remove(dtrace_byfunc, probe);
- dtrace_hash_remove(dtrace_byname, probe);
-
- if (first == NULL) {
- first = probe;
- probe->dtpr_nextmod = NULL;
- } else {
- probe->dtpr_nextmod = first;
- first = probe;
- }
- }
-
- /*
- * We've removed all of the module's probes from the hash chains and
- * from the probe array. Now issue a dtrace_sync() to be sure that
- * everyone has cleared out from any probe array processing.
- */
- dtrace_sync();
-
- for (probe = first; probe != NULL; probe = first) {
- first = probe->dtpr_nextmod;
- prov = probe->dtpr_provider;
- prov->dtpv_pops.dtps_destroy(prov->dtpv_arg, probe->dtpr_id,
- probe->dtpr_arg);
- kmem_free(probe->dtpr_mod, strlen(probe->dtpr_mod) + 1);
- kmem_free(probe->dtpr_func, strlen(probe->dtpr_func) + 1);
- kmem_free(probe->dtpr_name, strlen(probe->dtpr_name) + 1);
- vmem_free(dtrace_arena, (void *)(uintptr_t)probe->dtpr_id, 1);
- kmem_free(probe, sizeof (dtrace_probe_t));
- }
-
- mutex_exit(&dtrace_lock);
- mutex_exit(&mod_lock);
- mutex_exit(&dtrace_provider_lock);
-}
-#else /* __APPLE__ */
-
-/*
- * Return 0 on success
- * Return -1 on failure
- */
-static int
-dtrace_module_unloaded(struct kmod_info *kmod)
-{
- dtrace_probe_t template, *probe, *first, *next;
- dtrace_provider_t *prov;
- struct modctl *ctl = NULL;
- struct modctl *syncctl = NULL;
- struct modctl *nextsyncctl = NULL;
- int syncmode = 0;
-
- lck_mtx_lock(&dtrace_provider_lock);
- lck_mtx_lock(&mod_lock);
- lck_mtx_lock(&dtrace_lock);
-
- if (kmod == NULL) {
- syncmode = 1;
- }
- else {
- ctl = dtrace_modctl_lookup(kmod);
- if (ctl == NULL)
- {
- lck_mtx_unlock(&dtrace_lock);
- lck_mtx_unlock(&mod_lock);
- lck_mtx_unlock(&dtrace_provider_lock);
- return (-1);
- }
- ctl->mod_loaded = 0;
- ctl->mod_address = 0;
- ctl->mod_size = 0;
- }
-
- if (dtrace_bymod == NULL) {
- /*
- * The DTrace module is loaded (obviously) but not attached;
- * we don't have any work to do.
- */
- if (ctl != NULL)
- (void)dtrace_modctl_remove(ctl);
- lck_mtx_unlock(&dtrace_provider_lock);
- lck_mtx_unlock(&mod_lock);
- lck_mtx_unlock(&dtrace_lock);
- return(0);
- }
-
- /* Syncmode set means we target and traverse entire modctl list. */
- if (syncmode)
- nextsyncctl = dtrace_modctl_list;
+ /* Syncmode set means we target and traverse entire modctl list. */
+ if (syncmode)
+ nextsyncctl = dtrace_modctl_list;
syncloop:
if (syncmode)
if (syncctl==NULL)
{
/* We have no more work to do */
- lck_mtx_unlock(&dtrace_provider_lock);
- lck_mtx_unlock(&mod_lock);
lck_mtx_unlock(&dtrace_lock);
+ lck_mtx_unlock(&mod_lock);
+ lck_mtx_unlock(&dtrace_provider_lock);
return(0);
}
else {
goto syncloop;
}
- lck_mtx_unlock(&dtrace_provider_lock);
- lck_mtx_unlock(&mod_lock);
lck_mtx_unlock(&dtrace_lock);
+ lck_mtx_unlock(&mod_lock);
+ lck_mtx_unlock(&dtrace_provider_lock);
if (dtrace_err_verbose) {
cmn_err(CE_WARN, "unloaded module '%s' had "
ASSERT(dtrace_probes[probe->dtpr_id - 1] == probe);
dtrace_probes[probe->dtpr_id - 1] = NULL;
- probe->dtpr_provider->probe_count--;
+ probe->dtpr_provider->dtpv_probe_count--;
next = probe->dtpr_nextmod;
dtrace_hash_remove(dtrace_bymod, probe);
return(0);
}
-#endif /* __APPLE__ */
void
dtrace_suspend(void)
dtrace_toxrange = range;
}
- ASSERT(dtrace_toxrange[dtrace_toxranges].dtt_base == NULL);
- ASSERT(dtrace_toxrange[dtrace_toxranges].dtt_limit == NULL);
+ ASSERT(dtrace_toxrange[dtrace_toxranges].dtt_base == 0);
+ ASSERT(dtrace_toxrange[dtrace_toxranges].dtt_limit == 0);
dtrace_toxrange[dtrace_toxranges].dtt_base = base;
dtrace_toxrange[dtrace_toxranges].dtt_limit = limit;
lck_mtx_lock(&dtrace_provider_lock);
lck_mtx_lock(&dtrace_lock);
- if (ddi_soft_state_init(&dtrace_softstate,
- sizeof (dtrace_state_t), 0) != 0) {
- cmn_err(CE_NOTE, "/dev/dtrace failed to initialize soft state");
- lck_mtx_unlock(&cpu_lock);
- lck_mtx_unlock(&dtrace_provider_lock);
- lck_mtx_unlock(&dtrace_lock);
- return (DDI_FAILURE);
- }
-
-#if !defined(__APPLE__)
- if (ddi_create_minor_node(devi, DTRACEMNR_DTRACE, S_IFCHR,
- DTRACEMNRN_DTRACE, DDI_PSEUDO, NULL) == DDI_FAILURE ||
- ddi_create_minor_node(devi, DTRACEMNR_HELPER, S_IFCHR,
- DTRACEMNRN_HELPER, DDI_PSEUDO, NULL) == DDI_FAILURE) {
- cmn_err(CE_NOTE, "/dev/dtrace couldn't create minor nodes");
- ddi_remove_minor_node(devi, NULL);
- ddi_soft_state_fini(&dtrace_softstate);
- lck_mtx_unlock(&cpu_lock);
- lck_mtx_unlock(&dtrace_provider_lock);
- lck_mtx_unlock(&dtrace_lock);
- return (DDI_FAILURE);
- }
-#else
/* Darwin uses BSD cloning device driver to automagically obtain minor device number. */
-#endif /* __APPLE__ */
ddi_report_dev(devi);
dtrace_devi = devi;
dtrace_arena = vmem_create("dtrace", (void *)1, UINT32_MAX, 1,
NULL, NULL, NULL, 0, VM_SLEEP | VMC_IDENTIFIER);
- dtrace_minor = vmem_create("dtrace_minor", (void *)DTRACEMNRN_CLONE,
- UINT32_MAX - DTRACEMNRN_CLONE, 1, NULL, NULL, NULL, 0,
- VM_SLEEP | VMC_IDENTIFIER);
dtrace_taskq = taskq_create("dtrace_taskq", 1, maxclsyspri,
1, INT_MAX, 0);
NULL, NULL, NULL, NULL, NULL, 0);
lck_mtx_assert(&cpu_lock, LCK_MTX_ASSERT_OWNED);
+
dtrace_bymod = dtrace_hash_create(offsetof(dtrace_probe_t, dtpr_mod),
offsetof(dtrace_probe_t, dtpr_nextmod),
offsetof(dtrace_probe_t, dtpr_prevmod));
ASSERT(dtrace_provider != NULL);
ASSERT((dtrace_provider_id_t)dtrace_provider == id);
-#if !defined(__APPLE__)
- dtrace_probeid_begin = dtrace_probe_create((dtrace_provider_id_t)
- dtrace_provider, NULL, NULL, "BEGIN", 0, NULL);
- dtrace_probeid_end = dtrace_probe_create((dtrace_provider_id_t)
- dtrace_provider, NULL, NULL, "END", 0, NULL);
- dtrace_probeid_error = dtrace_probe_create((dtrace_provider_id_t)
- dtrace_provider, NULL, NULL, "ERROR", 1, NULL);
-#elif defined (__x86_64__)
+#if defined (__x86_64__)
dtrace_probeid_begin = dtrace_probe_create((dtrace_provider_id_t)
dtrace_provider, NULL, NULL, "BEGIN", 1, NULL);
dtrace_probeid_end = dtrace_probe_create((dtrace_provider_id_t)
dtrace_provider, NULL, NULL, "ERROR", 3, NULL);
#else
#error Unknown Architecture
-#endif /* __APPLE__ */
+#endif
dtrace_anon_property();
lck_mtx_unlock(&cpu_lock);
if (dtrace_anon.dta_enabling != NULL) {
ASSERT(dtrace_retained == dtrace_anon.dta_enabling);
-#if defined(__APPLE__)
/*
- * If there is anonymous dof, we should switch symbol modes.
+ * APPLE NOTE: if handling anonymous dof, switch symbol modes.
*/
if (dtrace_kernel_symbol_mode == DTRACE_KERNEL_SYMBOLS_FROM_USERSPACE) {
dtrace_kernel_symbol_mode = DTRACE_KERNEL_SYMBOLS_FROM_KERNEL;
}
-#endif
dtrace_enabling_provide(NULL);
state = dtrace_anon.dta_state;
lck_mtx_lock(&dtrace_lock);
if ((enab = dtrace_anon.dta_enabling) != NULL)
- (void) dtrace_enabling_match(enab, NULL);
+ (void) dtrace_enabling_match(enab, NULL, NULL);
lck_mtx_unlock(&cpu_lock);
}
uint32_t priv;
uid_t uid;
zoneid_t zoneid;
-#if defined (__APPLE__)
int rv;
-#endif /* __APPLE__ */
-
-#if !defined(__APPLE__)
- if (getminor(*devp) == DTRACEMNRN_HELPER)
- return (0);
- /*
- * If this wasn't an open with the "helper" minor, then it must be
- * the "dtrace" minor.
- */
- if (getminor(*devp) != DTRACEMNRN_DTRACE)
- return (ENXIO);
-#else
- /* Darwin puts Helper on its own major device. */
-#endif /* __APPLE__ */
+ /* APPLE: Darwin puts Helper on its own major device. */
/*
* If no DTRACE_PRIV_* bits are set in the credential, then the
if (priv == DTRACE_PRIV_NONE)
return (EACCES);
-#if defined(__APPLE__)
/*
- * We delay the initialization of fasttrap as late as possible.
+ * APPLE NOTE: We delay the initialization of fasttrap as late as possible.
* It certainly can't be later than now!
*/
fasttrap_init();
-#endif /* __APPLE__ */
/*
* Ask all providers to provide all their probes.
*/
if (kdi_dtrace_set(KDI_DTSET_DTRACE_ACTIVATE) != 0) {
dtrace_opens--;
- lck_mtx_unlock(&cpu_lock);
lck_mtx_unlock(&dtrace_lock);
+ lck_mtx_unlock(&cpu_lock);
return (EBUSY);
}
-#if !defined(__APPLE__)
- state = dtrace_state_create(devp, cred_p);
- lck_mtx_unlock(&cpu_lock);
-
- if (state == NULL) {
- if (--dtrace_opens == 0 && dtrace_anon.dta_enabling == NULL)
- (void) kdi_dtrace_set(KDI_DTSET_DTRACE_DEACTIVATE);
- lck_mtx_unlock(&dtrace_lock);
- return (EAGAIN);
- }
-
- lck_mtx_unlock(&dtrace_lock);
-#else
rv = dtrace_state_create(devp, cred_p, &state);
lck_mtx_unlock(&cpu_lock);
*/
if (dtrace_dof_mode == DTRACE_DOF_MODE_LAZY_ON) {
dtrace_dof_mode = DTRACE_DOF_MODE_LAZY_OFF;
-
+ /*
+ * We do not need to hold the exclusive lock while processing
+ * DOF on processes. We do need to make sure the mode does not get
+ * changed to DTRACE_DOF_MODE_LAZY_ON during that stage though
+ * (which should not happen anyway since it only happens in
+ * dtrace_close). There is no way imcomplete USDT probes can be
+ * activate by any DTrace clients here since they all have to
+ * call dtrace_open and be blocked on dtrace_dof_mode_lock
+ */
+ lck_rw_lock_exclusive_to_shared(&dtrace_dof_mode_lock);
/*
* Iterate all existing processes and load lazy dofs.
*/
NULL,
dtrace_lazy_dofs_proc_iterate_filter,
NULL);
- }
-
- lck_rw_unlock_exclusive(&dtrace_dof_mode_lock);
- /*
- * Update kernel symbol state.
- *
- * We must own the provider and dtrace locks.
- *
- * NOTE! It may appear there is a race by setting this value so late
- * after dtrace_probe_provide. However, any kext loaded after the
- * call to probe provide and before we set LAZY_OFF will be marked as
- * eligible for symbols from userspace. The same dtrace that is currently
- * calling dtrace_open() (this call!) will get a list of kexts needing
- * symbols and fill them in, thus closing the race window.
- *
- * We want to set this value only after it certain it will succeed, as
- * this significantly reduces the complexity of error exits.
- */
- lck_mtx_lock(&dtrace_lock);
- if (dtrace_kernel_symbol_mode == DTRACE_KERNEL_SYMBOLS_FROM_USERSPACE) {
- dtrace_kernel_symbol_mode = DTRACE_KERNEL_SYMBOLS_FROM_KERNEL;
+ lck_rw_unlock_shared(&dtrace_dof_mode_lock);
}
- lck_mtx_unlock(&dtrace_lock);
-#endif /* __APPLE__ */
-
- return (0);
-}
-
-/*ARGSUSED*/
-static int
-dtrace_close(dev_t dev, int flag, int otyp, cred_t *cred_p)
-{
-#pragma unused(flag, otyp, cred_p) /* __APPLE__ */
- minor_t minor = getminor(dev);
- dtrace_state_t *state;
-
-#if !defined(__APPLE__)
- if (minor == DTRACEMNRN_HELPER)
- return (0);
-#else
- /* Darwin puts Helper on its own major device. */
-#endif /* __APPLE__ */
-
- state = ddi_get_soft_state(dtrace_softstate, minor);
-
- lck_mtx_lock(&cpu_lock);
- lck_mtx_lock(&dtrace_lock);
-
- if (state->dts_anon) {
- /*
- * There is anonymous state. Destroy that first.
- */
- ASSERT(dtrace_anon.dta_state == NULL);
- dtrace_state_destroy(state->dts_anon);
+ else {
+ lck_rw_unlock_exclusive(&dtrace_dof_mode_lock);
}
- dtrace_state_destroy(state);
- ASSERT(dtrace_opens > 0);
-
- /*
- * Only relinquish control of the kernel debugger interface when there
- * are no consumers and no anonymous enablings.
- */
- if (--dtrace_opens == 0 && dtrace_anon.dta_enabling == NULL)
- (void) kdi_dtrace_set(KDI_DTSET_DTRACE_DEACTIVATE);
-
- lck_mtx_unlock(&dtrace_lock);
- lck_mtx_unlock(&cpu_lock);
-
-#if defined(__APPLE__)
- /*
- * Lock ordering requires the dof mode lock be taken before
- * the dtrace_lock.
- */
- lck_rw_lock_exclusive(&dtrace_dof_mode_lock);
- lck_mtx_lock(&dtrace_lock);
-
- if (dtrace_opens == 0) {
- /*
- * If we are currently lazy-off, and this is the last close, transition to
- * lazy state.
- */
- if (dtrace_dof_mode == DTRACE_DOF_MODE_LAZY_OFF) {
- dtrace_dof_mode = DTRACE_DOF_MODE_LAZY_ON;
- }
-
- /*
- * If we are the last dtrace client, switch back to lazy (from userspace) symbols
- */
- if (dtrace_kernel_symbol_mode == DTRACE_KERNEL_SYMBOLS_FROM_KERNEL) {
- dtrace_kernel_symbol_mode = DTRACE_KERNEL_SYMBOLS_FROM_USERSPACE;
- }
- }
-
- lck_mtx_unlock(&dtrace_lock);
- lck_rw_unlock_exclusive(&dtrace_dof_mode_lock);
-
- /*
- * Kext probes may be retained past the end of the kext's lifespan. The
- * probes are kept until the last reference to them has been removed.
- * Since closing an active dtrace context is likely to drop that last reference,
- * lets take a shot at cleaning out the orphaned probes now.
- */
- dtrace_module_unloaded(NULL);
-#endif /* __APPLE__ */
-
- return (0);
-}
-
-#if !defined(__APPLE__)
-/*ARGSUSED*/
-static int
-dtrace_ioctl_helper(int cmd, intptr_t arg, int *rv)
-{
- int rval;
- dof_helper_t help, *dhp = NULL;
-
- switch (cmd) {
- case DTRACEHIOC_ADDDOF:
- if (copyin((void *)arg, &help, sizeof (help)) != 0) {
- dtrace_dof_error(NULL, "failed to copyin DOF helper");
- return (EFAULT);
- }
-
- dhp = &help;
- arg = (intptr_t)help.dofhp_dof;
- /*FALLTHROUGH*/
-
- case DTRACEHIOC_ADD: {
- dof_hdr_t *dof = dtrace_dof_copyin(arg, &rval);
-
- if (dof == NULL)
- return (rval);
-
- mutex_enter(&dtrace_lock);
-
- /*
- * dtrace_helper_slurp() takes responsibility for the dof --
- * it may free it now or it may save it and free it later.
- */
- if ((rval = dtrace_helper_slurp(dof, dhp)) != -1) {
- *rv = rval;
- rval = 0;
- } else {
- rval = EINVAL;
- }
-
- mutex_exit(&dtrace_lock);
- return (rval);
- }
-
- case DTRACEHIOC_REMOVE: {
- mutex_enter(&dtrace_lock);
- rval = dtrace_helper_destroygen(arg);
- mutex_exit(&dtrace_lock);
-
- return (rval);
- }
-
- default:
- break;
- }
-
- return (ENOTTY);
-}
-
-/*ARGSUSED*/
-static int
-dtrace_ioctl(dev_t dev, u_long cmd, intptr_t arg, int md, cred_t *cr, int *rv)
-{
- minor_t minor = getminor(dev);
- dtrace_state_t *state;
- int rval;
-
- if (minor == DTRACEMNRN_HELPER)
- return (dtrace_ioctl_helper(cmd, arg, rv));
-
- state = ddi_get_soft_state(dtrace_softstate, minor);
-
- if (state->dts_anon) {
- ASSERT(dtrace_anon.dta_state == NULL);
- state = state->dts_anon;
- }
-
- switch (cmd) {
- case DTRACEIOC_PROVIDER: {
- dtrace_providerdesc_t pvd;
- dtrace_provider_t *pvp;
-
- if (copyin((void *)arg, &pvd, sizeof (pvd)) != 0)
- return (EFAULT);
-
- pvd.dtvd_name[DTRACE_PROVNAMELEN - 1] = '\0';
- lck_mtx_lock(&dtrace_provider_lock);
-
- for (pvp = dtrace_provider; pvp != NULL; pvp = pvp->dtpv_next) {
- if (strcmp(pvp->dtpv_name, pvd.dtvd_name) == 0)
- break;
- }
-
- lck_mtx_unlock(&dtrace_provider_lock);
-
- if (pvp == NULL)
- return (ESRCH);
-
- bcopy(&pvp->dtpv_priv, &pvd.dtvd_priv, sizeof (dtrace_ppriv_t));
- bcopy(&pvp->dtpv_attr, &pvd.dtvd_attr, sizeof (dtrace_pattr_t));
- if (copyout(&pvd, (void *)arg, sizeof (pvd)) != 0)
- return (EFAULT);
-
- return (0);
- }
-
- case DTRACEIOC_EPROBE: {
- dtrace_eprobedesc_t epdesc;
- dtrace_ecb_t *ecb;
- dtrace_action_t *act;
- void *buf;
- size_t size;
- uintptr_t dest;
- int nrecs;
-
- if (copyin((void *)arg, &epdesc, sizeof (epdesc)) != 0)
- return (EFAULT);
-
- lck_mtx_lock(&dtrace_lock);
-
- if ((ecb = dtrace_epid2ecb(state, epdesc.dtepd_epid)) == NULL) {
- lck_mtx_unlock(&dtrace_lock);
- return (EINVAL);
- }
-
- if (ecb->dte_probe == NULL) {
- lck_mtx_unlock(&dtrace_lock);
- return (EINVAL);
- }
-
- epdesc.dtepd_probeid = ecb->dte_probe->dtpr_id;
- epdesc.dtepd_uarg = ecb->dte_uarg;
- epdesc.dtepd_size = ecb->dte_size;
-
- nrecs = epdesc.dtepd_nrecs;
- epdesc.dtepd_nrecs = 0;
- for (act = ecb->dte_action; act != NULL; act = act->dta_next) {
- if (DTRACEACT_ISAGG(act->dta_kind) || act->dta_intuple)
- continue;
-
- epdesc.dtepd_nrecs++;
- }
-
- /*
- * Now that we have the size, we need to allocate a temporary
- * buffer in which to store the complete description. We need
- * the temporary buffer to be able to drop dtrace_lock()
- * across the copyout(), below.
- */
- size = sizeof (dtrace_eprobedesc_t) +
- (epdesc.dtepd_nrecs * sizeof (dtrace_recdesc_t));
-
- buf = kmem_alloc(size, KM_SLEEP);
- dest = (uintptr_t)buf;
-
- bcopy(&epdesc, (void *)dest, sizeof (epdesc));
- dest += offsetof(dtrace_eprobedesc_t, dtepd_rec[0]);
-
- for (act = ecb->dte_action; act != NULL; act = act->dta_next) {
- if (DTRACEACT_ISAGG(act->dta_kind) || act->dta_intuple)
- continue;
-
- if (nrecs-- == 0)
- break;
-
- bcopy(&act->dta_rec, (void *)dest,
- sizeof (dtrace_recdesc_t));
- dest += sizeof (dtrace_recdesc_t);
- }
-
- lck_mtx_unlock(&dtrace_lock);
-
- if (copyout(buf, (void *)arg, dest - (uintptr_t)buf) != 0) {
- kmem_free(buf, size);
- return (EFAULT);
- }
-
- kmem_free(buf, size);
- return (0);
- }
-
- case DTRACEIOC_AGGDESC: {
- dtrace_aggdesc_t aggdesc;
- dtrace_action_t *act;
- dtrace_aggregation_t *agg;
- int nrecs;
- uint32_t offs;
- dtrace_recdesc_t *lrec;
- void *buf;
- size_t size;
- uintptr_t dest;
-
- if (copyin((void *)arg, &aggdesc, sizeof (aggdesc)) != 0)
- return (EFAULT);
-
- lck_mtx_lock(&dtrace_lock);
-
- if ((agg = dtrace_aggid2agg(state, aggdesc.dtagd_id)) == NULL) {
- lck_mtx_unlock(&dtrace_lock);
- return (EINVAL);
- }
-
- aggdesc.dtagd_epid = agg->dtag_ecb->dte_epid;
-
- nrecs = aggdesc.dtagd_nrecs;
- aggdesc.dtagd_nrecs = 0;
-
- offs = agg->dtag_base;
- lrec = &agg->dtag_action.dta_rec;
- aggdesc.dtagd_size = lrec->dtrd_offset + lrec->dtrd_size - offs;
-
- for (act = agg->dtag_first; ; act = act->dta_next) {
- ASSERT(act->dta_intuple ||
- DTRACEACT_ISAGG(act->dta_kind));
-
- /*
- * If this action has a record size of zero, it
- * denotes an argument to the aggregating action.
- * Because the presence of this record doesn't (or
- * shouldn't) affect the way the data is interpreted,
- * we don't copy it out to save user-level the
- * confusion of dealing with a zero-length record.
- */
- if (act->dta_rec.dtrd_size == 0) {
- ASSERT(agg->dtag_hasarg);
- continue;
- }
-
- aggdesc.dtagd_nrecs++;
-
- if (act == &agg->dtag_action)
- break;
- }
-
- /*
- * Now that we have the size, we need to allocate a temporary
- * buffer in which to store the complete description. We need
- * the temporary buffer to be able to drop dtrace_lock()
- * across the copyout(), below.
- */
- size = sizeof (dtrace_aggdesc_t) +
- (aggdesc.dtagd_nrecs * sizeof (dtrace_recdesc_t));
-
- buf = kmem_alloc(size, KM_SLEEP);
- dest = (uintptr_t)buf;
-
- bcopy(&aggdesc, (void *)dest, sizeof (aggdesc));
- dest += offsetof(dtrace_aggdesc_t, dtagd_rec[0]);
-
- for (act = agg->dtag_first; ; act = act->dta_next) {
- dtrace_recdesc_t rec = act->dta_rec;
-
- /*
- * See the comment in the above loop for why we pass
- * over zero-length records.
- */
- if (rec.dtrd_size == 0) {
- ASSERT(agg->dtag_hasarg);
- continue;
- }
-
- if (nrecs-- == 0)
- break;
-
- rec.dtrd_offset -= offs;
- bcopy(&rec, (void *)dest, sizeof (rec));
- dest += sizeof (dtrace_recdesc_t);
-
- if (act == &agg->dtag_action)
- break;
- }
-
- lck_mtx_unlock(&dtrace_lock);
-
- if (copyout(buf, (void *)arg, dest - (uintptr_t)buf) != 0) {
- kmem_free(buf, size);
- return (EFAULT);
- }
-
- kmem_free(buf, size);
- return (0);
- }
-
- case DTRACEIOC_ENABLE: {
- dof_hdr_t *dof;
- dtrace_enabling_t *enab = NULL;
- dtrace_vstate_t *vstate;
- int err = 0;
-
- *rv = 0;
-
- /*
- * If a NULL argument has been passed, we take this as our
- * cue to reevaluate our enablings.
- */
- if (arg == NULL) {
- dtrace_enabling_matchall();
-
- return (0);
- }
-
- if ((dof = dtrace_dof_copyin(arg, &rval)) == NULL)
- return (rval);
-
- lck_mtx_lock(&cpu_lock);
- lck_mtx_lock(&dtrace_lock);
- vstate = &state->dts_vstate;
-
- if (state->dts_activity != DTRACE_ACTIVITY_INACTIVE) {
- lck_mtx_unlock(&dtrace_lock);
- lck_mtx_unlock(&cpu_lock);
- dtrace_dof_destroy(dof);
- return (EBUSY);
- }
-
- if (dtrace_dof_slurp(dof, vstate, cr, &enab, 0, B_TRUE) != 0) {
- lck_mtx_unlock(&dtrace_lock);
- lck_mtx_unlock(&cpu_lock);
- dtrace_dof_destroy(dof);
- return (EINVAL);
- }
-
- if ((rval = dtrace_dof_options(dof, state)) != 0) {
- dtrace_enabling_destroy(enab);
- lck_mtx_unlock(&dtrace_lock);
- lck_mtx_unlock(&cpu_lock);
- dtrace_dof_destroy(dof);
- return (rval);
- }
-
- if ((err = dtrace_enabling_match(enab, rv)) == 0) {
- err = dtrace_enabling_retain(enab);
- } else {
- dtrace_enabling_destroy(enab);
- }
-
- lck_mtx_unlock(&cpu_lock);
- lck_mtx_unlock(&dtrace_lock);
- dtrace_dof_destroy(dof);
-
- return (err);
- }
-
- case DTRACEIOC_REPLICATE: {
- dtrace_repldesc_t desc;
- dtrace_probedesc_t *match = &desc.dtrpd_match;
- dtrace_probedesc_t *create = &desc.dtrpd_create;
- int err;
-
- if (copyin((void *)arg, &desc, sizeof (desc)) != 0)
- return (EFAULT);
-
- match->dtpd_provider[DTRACE_PROVNAMELEN - 1] = '\0';
- match->dtpd_mod[DTRACE_MODNAMELEN - 1] = '\0';
- match->dtpd_func[DTRACE_FUNCNAMELEN - 1] = '\0';
- match->dtpd_name[DTRACE_NAMELEN - 1] = '\0';
-
- create->dtpd_provider[DTRACE_PROVNAMELEN - 1] = '\0';
- create->dtpd_mod[DTRACE_MODNAMELEN - 1] = '\0';
- create->dtpd_func[DTRACE_FUNCNAMELEN - 1] = '\0';
- create->dtpd_name[DTRACE_NAMELEN - 1] = '\0';
-
- lck_mtx_lock(&dtrace_lock);
- err = dtrace_enabling_replicate(state, match, create);
- lck_mtx_unlock(&dtrace_lock);
-
- return (err);
- }
-
- case DTRACEIOC_PROBEMATCH:
- case DTRACEIOC_PROBES: {
- dtrace_probe_t *probe = NULL;
- dtrace_probedesc_t desc;
- dtrace_probekey_t pkey;
- dtrace_id_t i;
- int m = 0;
- uint32_t priv;
- uid_t uid;
- zoneid_t zoneid;
-
- if (copyin((void *)arg, &desc, sizeof (desc)) != 0)
- return (EFAULT);
-
- desc.dtpd_provider[DTRACE_PROVNAMELEN - 1] = '\0';
- desc.dtpd_mod[DTRACE_MODNAMELEN - 1] = '\0';
- desc.dtpd_func[DTRACE_FUNCNAMELEN - 1] = '\0';
- desc.dtpd_name[DTRACE_NAMELEN - 1] = '\0';
-
- /*
- * Before we attempt to match this probe, we want to give
- * all providers the opportunity to provide it.
- */
- if (desc.dtpd_id == DTRACE_IDNONE) {
- lck_mtx_lock(&dtrace_provider_lock);
- dtrace_probe_provide(&desc, NULL);
- lck_mtx_unlock(&dtrace_provider_lock);
- desc.dtpd_id++;
- }
-
- if (cmd == DTRACEIOC_PROBEMATCH) {
- dtrace_probekey(&desc, &pkey);
- pkey.dtpk_id = DTRACE_IDNONE;
- }
-
- dtrace_cred2priv(cr, &priv, &uid, &zoneid);
-
- lck_mtx_lock(&dtrace_lock);
-
- if (cmd == DTRACEIOC_PROBEMATCH) {
- for (i = desc.dtpd_id; i <= dtrace_nprobes; i++) {
- if ((probe = dtrace_probes[i - 1]) != NULL &&
- (m = dtrace_match_probe(probe, &pkey,
- priv, uid, zoneid)) != 0)
- break;
- }
-
- if (m < 0) {
- lck_mtx_unlock(&dtrace_lock);
- return (EINVAL);
- }
-
- } else {
- for (i = desc.dtpd_id; i <= dtrace_nprobes; i++) {
- if ((probe = dtrace_probes[i - 1]) != NULL &&
- dtrace_match_priv(probe, priv, uid, zoneid))
- break;
- }
- }
-
- if (probe == NULL) {
- lck_mtx_unlock(&dtrace_lock);
- return (ESRCH);
- }
-
- dtrace_probe_description(probe, &desc);
- lck_mtx_unlock(&dtrace_lock);
-
- if (copyout(&desc, (void *)arg, sizeof (desc)) != 0)
- return (EFAULT);
-
- return (0);
- }
-
- case DTRACEIOC_PROBEARG: {
- dtrace_argdesc_t desc;
- dtrace_probe_t *probe;
- dtrace_provider_t *prov;
-
- if (copyin((void *)arg, &desc, sizeof (desc)) != 0)
- return (EFAULT);
-
- if (desc.dtargd_id == DTRACE_IDNONE)
- return (EINVAL);
-
- if (desc.dtargd_ndx == DTRACE_ARGNONE)
- return (EINVAL);
-
- lck_mtx_lock(&dtrace_provider_lock);
- lck_mtx_lock(&mod_lock);
- lck_mtx_lock(&dtrace_lock);
-
- if (desc.dtargd_id > dtrace_nprobes) {
- lck_mtx_unlock(&dtrace_lock);
- lck_mtx_unlock(&mod_lock);
- lck_mtx_unlock(&dtrace_provider_lock);
- return (EINVAL);
- }
-
- if ((probe = dtrace_probes[desc.dtargd_id - 1]) == NULL) {
- lck_mtx_unlock(&dtrace_lock);
- lck_mtx_unlock(&mod_lock);
- lck_mtx_unlock(&dtrace_provider_lock);
- return (EINVAL);
- }
-
- lck_mtx_unlock(&dtrace_lock);
-
- prov = probe->dtpr_provider;
-
- if (prov->dtpv_pops.dtps_getargdesc == NULL) {
- /*
- * There isn't any typed information for this probe.
- * Set the argument number to DTRACE_ARGNONE.
- */
- desc.dtargd_ndx = DTRACE_ARGNONE;
- } else {
- desc.dtargd_native[0] = '\0';
- desc.dtargd_xlate[0] = '\0';
- desc.dtargd_mapping = desc.dtargd_ndx;
-
- prov->dtpv_pops.dtps_getargdesc(prov->dtpv_arg,
- probe->dtpr_id, probe->dtpr_arg, &desc);
- }
-
- lck_mtx_unlock(&mod_lock);
- lck_mtx_unlock(&dtrace_provider_lock);
-
- if (copyout(&desc, (void *)arg, sizeof (desc)) != 0)
- return (EFAULT);
-
- return (0);
- }
-
- case DTRACEIOC_GO: {
- processorid_t cpuid;
- rval = dtrace_state_go(state, &cpuid);
-
- if (rval != 0)
- return (rval);
-
- if (copyout(&cpuid, (void *)arg, sizeof (cpuid)) != 0)
- return (EFAULT);
-
- return (0);
- }
-
- case DTRACEIOC_STOP: {
- processorid_t cpuid;
-
- lck_mtx_lock(&dtrace_lock);
- rval = dtrace_state_stop(state, &cpuid);
- lck_mtx_unlock(&dtrace_lock);
-
- if (rval != 0)
- return (rval);
-
- if (copyout(&cpuid, (void *)arg, sizeof (cpuid)) != 0)
- return (EFAULT);
-
- return (0);
- }
-
- case DTRACEIOC_DOFGET: {
- dof_hdr_t hdr, *dof;
- uint64_t len;
-
- if (copyin((void *)arg, &hdr, sizeof (hdr)) != 0)
- return (EFAULT);
-
- lck_mtx_lock(&dtrace_lock);
- dof = dtrace_dof_create(state);
- lck_mtx_unlock(&dtrace_lock);
-
- len = MIN(hdr.dofh_loadsz, dof->dofh_loadsz);
- rval = copyout(dof, (void *)arg, len);
- dtrace_dof_destroy(dof);
-
- return (rval == 0 ? 0 : EFAULT);
- }
-
- case DTRACEIOC_AGGSNAP:
- case DTRACEIOC_BUFSNAP: {
- dtrace_bufdesc_t desc;
- caddr_t cached;
- dtrace_buffer_t *buf;
-
- if (copyin((void *)arg, &desc, sizeof (desc)) != 0)
- return (EFAULT);
-
- if (desc.dtbd_cpu < 0 || desc.dtbd_cpu >= NCPU)
- return (EINVAL);
-
- lck_mtx_lock(&dtrace_lock);
-
- if (cmd == DTRACEIOC_BUFSNAP) {
- buf = &state->dts_buffer[desc.dtbd_cpu];
- } else {
- buf = &state->dts_aggbuffer[desc.dtbd_cpu];
- }
-
- if (buf->dtb_flags & (DTRACEBUF_RING | DTRACEBUF_FILL)) {
- size_t sz = buf->dtb_offset;
-
- if (state->dts_activity != DTRACE_ACTIVITY_STOPPED) {
- lck_mtx_unlock(&dtrace_lock);
- return (EBUSY);
- }
-
- /*
- * If this buffer has already been consumed, we're
- * going to indicate that there's nothing left here
- * to consume.
- */
- if (buf->dtb_flags & DTRACEBUF_CONSUMED) {
- lck_mtx_unlock(&dtrace_lock);
-
- desc.dtbd_size = 0;
- desc.dtbd_drops = 0;
- desc.dtbd_errors = 0;
- desc.dtbd_oldest = 0;
- sz = sizeof (desc);
-
- if (copyout(&desc, (void *)arg, sz) != 0)
- return (EFAULT);
-
- return (0);
- }
-
- /*
- * If this is a ring buffer that has wrapped, we want
- * to copy the whole thing out.
- */
- if (buf->dtb_flags & DTRACEBUF_WRAPPED) {
- dtrace_buffer_polish(buf);
- sz = buf->dtb_size;
- }
-
- if (copyout(buf->dtb_tomax, desc.dtbd_data, sz) != 0) {
- lck_mtx_unlock(&dtrace_lock);
- return (EFAULT);
- }
-
- desc.dtbd_size = sz;
- desc.dtbd_drops = buf->dtb_drops;
- desc.dtbd_errors = buf->dtb_errors;
- desc.dtbd_oldest = buf->dtb_xamot_offset;
-
- lck_mtx_unlock(&dtrace_lock);
-
- if (copyout(&desc, (void *)arg, sizeof (desc)) != 0)
- return (EFAULT);
-
- buf->dtb_flags |= DTRACEBUF_CONSUMED;
-
- return (0);
- }
-
- if (buf->dtb_tomax == NULL) {
- ASSERT(buf->dtb_xamot == NULL);
- lck_mtx_unlock(&dtrace_lock);
- return (ENOENT);
- }
-
- cached = buf->dtb_tomax;
- ASSERT(!(buf->dtb_flags & DTRACEBUF_NOSWITCH));
-
- dtrace_xcall(desc.dtbd_cpu,
- (dtrace_xcall_t)dtrace_buffer_switch, buf);
-
- state->dts_errors += buf->dtb_xamot_errors;
-
- /*
- * If the buffers did not actually switch, then the cross call
- * did not take place -- presumably because the given CPU is
- * not in the ready set. If this is the case, we'll return
- * ENOENT.
- */
- if (buf->dtb_tomax == cached) {
- ASSERT(buf->dtb_xamot != cached);
- lck_mtx_unlock(&dtrace_lock);
- return (ENOENT);
- }
-
- ASSERT(cached == buf->dtb_xamot);
-
- /*
- * We have our snapshot; now copy it out.
- */
- if (copyout(buf->dtb_xamot, desc.dtbd_data,
- buf->dtb_xamot_offset) != 0) {
- lck_mtx_unlock(&dtrace_lock);
- return (EFAULT);
- }
-
- desc.dtbd_size = buf->dtb_xamot_offset;
- desc.dtbd_drops = buf->dtb_xamot_drops;
- desc.dtbd_errors = buf->dtb_xamot_errors;
- desc.dtbd_oldest = 0;
-
- lck_mtx_unlock(&dtrace_lock);
-
- /*
- * Finally, copy out the buffer description.
- */
- if (copyout(&desc, (void *)arg, sizeof (desc)) != 0)
- return (EFAULT);
-
- return (0);
- }
-
- case DTRACEIOC_CONF: {
- dtrace_conf_t conf;
-
- bzero(&conf, sizeof (conf));
- conf.dtc_difversion = DIF_VERSION;
- conf.dtc_difintregs = DIF_DIR_NREGS;
- conf.dtc_diftupregs = DIF_DTR_NREGS;
- conf.dtc_ctfmodel = CTF_MODEL_NATIVE;
-
- if (copyout(&conf, (void *)arg, sizeof (conf)) != 0)
- return (EFAULT);
-
- return (0);
- }
-
- case DTRACEIOC_STATUS: {
- dtrace_status_t stat;
- dtrace_dstate_t *dstate;
- int i, j;
- uint64_t nerrs;
-
- /*
- * See the comment in dtrace_state_deadman() for the reason
- * for setting dts_laststatus to INT64_MAX before setting
- * it to the correct value.
- */
- state->dts_laststatus = INT64_MAX;
- dtrace_membar_producer();
- state->dts_laststatus = dtrace_gethrtime();
-
- bzero(&stat, sizeof (stat));
-
- lck_mtx_lock(&dtrace_lock);
-
- if (state->dts_activity == DTRACE_ACTIVITY_INACTIVE) {
- lck_mtx_unlock(&dtrace_lock);
- return (ENOENT);
- }
-
- if (state->dts_activity == DTRACE_ACTIVITY_DRAINING)
- stat.dtst_exiting = 1;
-
- nerrs = state->dts_errors;
- dstate = &state->dts_vstate.dtvs_dynvars;
-
- for (i = 0; i < NCPU; i++) {
- dtrace_dstate_percpu_t *dcpu = &dstate->dtds_percpu[i];
-
- stat.dtst_dyndrops += dcpu->dtdsc_drops;
- stat.dtst_dyndrops_dirty += dcpu->dtdsc_dirty_drops;
- stat.dtst_dyndrops_rinsing += dcpu->dtdsc_rinsing_drops;
-
- if (state->dts_buffer[i].dtb_flags & DTRACEBUF_FULL)
- stat.dtst_filled++;
-
- nerrs += state->dts_buffer[i].dtb_errors;
-
- for (j = 0; j < state->dts_nspeculations; j++) {
- dtrace_speculation_t *spec;
- dtrace_buffer_t *buf;
-
- spec = &state->dts_speculations[j];
- buf = &spec->dtsp_buffer[i];
- stat.dtst_specdrops += buf->dtb_xamot_drops;
- }
- }
-
- stat.dtst_specdrops_busy = state->dts_speculations_busy;
- stat.dtst_specdrops_unavail = state->dts_speculations_unavail;
- stat.dtst_stkstroverflows = state->dts_stkstroverflows;
- stat.dtst_dblerrors = state->dts_dblerrors;
- stat.dtst_killed =
- (state->dts_activity == DTRACE_ACTIVITY_KILLED);
- stat.dtst_errors = nerrs;
-
- lck_mtx_unlock(&dtrace_lock);
-
- if (copyout(&stat, (void *)arg, sizeof (stat)) != 0)
- return (EFAULT);
- return (0);
+ /*
+ * Update kernel symbol state.
+ *
+ * We must own the provider and dtrace locks.
+ *
+ * NOTE! It may appear there is a race by setting this value so late
+ * after dtrace_probe_provide. However, any kext loaded after the
+ * call to probe provide and before we set LAZY_OFF will be marked as
+ * eligible for symbols from userspace. The same dtrace that is currently
+ * calling dtrace_open() (this call!) will get a list of kexts needing
+ * symbols and fill them in, thus closing the race window.
+ *
+ * We want to set this value only after it certain it will succeed, as
+ * this significantly reduces the complexity of error exits.
+ */
+ lck_mtx_lock(&dtrace_lock);
+ if (dtrace_kernel_symbol_mode == DTRACE_KERNEL_SYMBOLS_FROM_USERSPACE) {
+ dtrace_kernel_symbol_mode = DTRACE_KERNEL_SYMBOLS_FROM_KERNEL;
}
+ lck_mtx_unlock(&dtrace_lock);
- case DTRACEIOC_FORMAT: {
- dtrace_fmtdesc_t fmt;
- char *str;
- int len;
+ return (0);
+}
- if (copyin((void *)arg, &fmt, sizeof (fmt)) != 0)
- return (EFAULT);
+/*ARGSUSED*/
+static int
+dtrace_close(dev_t dev, int flag, int otyp, cred_t *cred_p)
+{
+#pragma unused(flag, otyp, cred_p) /* __APPLE__ */
+ minor_t minor = getminor(dev);
+ dtrace_state_t *state;
- lck_mtx_lock(&dtrace_lock);
+ /* APPLE NOTE: Darwin puts Helper on its own major device. */
+ state = dtrace_state_get(minor);
- if (fmt.dtfd_format == 0 ||
- fmt.dtfd_format > state->dts_nformats) {
- lck_mtx_unlock(&dtrace_lock);
- return (EINVAL);
- }
+ lck_mtx_lock(&cpu_lock);
+ lck_mtx_lock(&dtrace_lock);
+ if (state->dts_anon) {
/*
- * Format strings are allocated contiguously and they are
- * never freed; if a format index is less than the number
- * of formats, we can assert that the format map is non-NULL
- * and that the format for the specified index is non-NULL.
+ * There is anonymous state. Destroy that first.
*/
- ASSERT(state->dts_formats != NULL);
- str = state->dts_formats[fmt.dtfd_format - 1];
- ASSERT(str != NULL);
+ ASSERT(dtrace_anon.dta_state == NULL);
+ dtrace_state_destroy(state->dts_anon);
+ }
- len = strlen(str) + 1;
+ dtrace_state_destroy(state);
+ ASSERT(dtrace_opens > 0);
- if (len > fmt.dtfd_length) {
- fmt.dtfd_length = len;
+ /*
+ * Only relinquish control of the kernel debugger interface when there
+ * are no consumers and no anonymous enablings.
+ */
+ if (--dtrace_opens == 0 && dtrace_anon.dta_enabling == NULL)
+ (void) kdi_dtrace_set(KDI_DTSET_DTRACE_DEACTIVATE);
+
+ lck_mtx_unlock(&dtrace_lock);
+ lck_mtx_unlock(&cpu_lock);
- if (copyout(&fmt, (void *)arg, sizeof (fmt)) != 0) {
- lck_mtx_unlock(&dtrace_lock);
- return (EINVAL);
- }
- } else {
- if (copyout(str, fmt.dtfd_string, len) != 0) {
- lck_mtx_unlock(&dtrace_lock);
- return (EINVAL);
- }
+ /*
+ * Lock ordering requires the dof mode lock be taken before
+ * the dtrace_lock.
+ */
+ lck_rw_lock_exclusive(&dtrace_dof_mode_lock);
+ lck_mtx_lock(&dtrace_lock);
+
+ if (dtrace_opens == 0) {
+ /*
+ * If we are currently lazy-off, and this is the last close, transition to
+ * lazy state.
+ */
+ if (dtrace_dof_mode == DTRACE_DOF_MODE_LAZY_OFF) {
+ dtrace_dof_mode = DTRACE_DOF_MODE_LAZY_ON;
}
- lck_mtx_unlock(&dtrace_lock);
- return (0);
- }
-
- default:
- break;
+ /*
+ * If we are the last dtrace client, switch back to lazy (from userspace) symbols
+ */
+ if (dtrace_kernel_symbol_mode == DTRACE_KERNEL_SYMBOLS_FROM_KERNEL) {
+ dtrace_kernel_symbol_mode = DTRACE_KERNEL_SYMBOLS_FROM_USERSPACE;
+ }
}
+
+ lck_mtx_unlock(&dtrace_lock);
+ lck_rw_unlock_exclusive(&dtrace_dof_mode_lock);
+
+ /*
+ * Kext probes may be retained past the end of the kext's lifespan. The
+ * probes are kept until the last reference to them has been removed.
+ * Since closing an active dtrace context is likely to drop that last reference,
+ * lets take a shot at cleaning out the orphaned probes now.
+ */
+ dtrace_module_unloaded(NULL);
- return (ENOTTY);
+ return (0);
}
-#else
+
/*ARGSUSED*/
static int
dtrace_ioctl_helper(u_long cmd, caddr_t arg, int *rv)
/* Darwin puts Helper on its own major device. */
- state = ddi_get_soft_state(dtrace_softstate, minor);
+ state = dtrace_state_get(minor);
if (state->dts_anon) {
ASSERT(dtrace_anon.dta_state == NULL);
* If a NULL argument has been passed, we take this as our
* cue to reevaluate our enablings.
*/
- if (arg == NULL) {
+ if (arg == 0) {
dtrace_enabling_matchall();
return (0);
return (rval);
}
- if ((err = dtrace_enabling_match(enab, rv)) == 0) {
+ if ((err = dtrace_enabling_match(enab, rv, NULL)) == 0) {
err = dtrace_enabling_retain(enab);
} else {
dtrace_enabling_destroy(enab);
}
- lck_mtx_unlock(&cpu_lock);
lck_mtx_unlock(&dtrace_lock);
+ lck_mtx_unlock(&cpu_lock);
dtrace_dof_destroy(dof);
return (err);
return (rval == 0 ? 0 : EFAULT);
}
+ case DTRACEIOC_SLEEP: {
+ int64_t time;
+ uint64_t abstime;
+ uint64_t rvalue = DTRACE_WAKE_TIMEOUT;
+
+ if (copyin(arg, &time, sizeof(time)) != 0)
+ return (EFAULT);
+
+ nanoseconds_to_absolutetime((uint64_t)time, &abstime);
+ clock_absolutetime_interval_to_deadline(abstime, &abstime);
+
+ if (assert_wait_deadline(state, THREAD_ABORTSAFE, abstime) == THREAD_WAITING) {
+ if (state->dts_buf_over_limit > 0) {
+ clear_wait(current_thread(), THREAD_INTERRUPTED);
+ rvalue = DTRACE_WAKE_BUF_LIMIT;
+ } else {
+ thread_block(THREAD_CONTINUE_NULL);
+ if (state->dts_buf_over_limit > 0) {
+ rvalue = DTRACE_WAKE_BUF_LIMIT;
+ }
+ }
+ }
+
+ if (copyout(&rvalue, arg, sizeof(rvalue)) != 0)
+ return (EFAULT);
+
+ return (0);
+ }
+
+ case DTRACEIOC_SIGNAL: {
+ wakeup(state);
+ return (0);
+ }
+
case DTRACEIOC_AGGSNAP:
case DTRACEIOC_BUFSNAP: {
dtrace_bufdesc_t desc;
caddr_t cached;
+ boolean_t over_limit;
dtrace_buffer_t *buf;
if (copyin(arg, &desc, sizeof (desc)) != 0)
desc.dtbd_drops = buf->dtb_drops;
desc.dtbd_errors = buf->dtb_errors;
desc.dtbd_oldest = buf->dtb_xamot_offset;
+ desc.dtbd_timestamp = dtrace_gethrtime();
lck_mtx_unlock(&dtrace_lock);
}
cached = buf->dtb_tomax;
+ over_limit = buf->dtb_cur_limit == buf->dtb_size;
+
ASSERT(!(buf->dtb_flags & DTRACEBUF_NOSWITCH));
dtrace_xcall(desc.dtbd_cpu,
}
ASSERT(cached == buf->dtb_xamot);
+ /*
+ * At this point we know the buffer have switched, so we
+ * can decrement the over limit count if the buffer was over
+ * its limit. The new buffer might already be over its limit
+ * yet, but we don't care since we're guaranteed not to be
+ * checking the buffer over limit count at this point.
+ */
+ if (over_limit) {
+ uint32_t old = atomic_add_32(&state->dts_buf_over_limit, -1);
+ #pragma unused(old)
+
+ /*
+ * Verify that we didn't underflow the value
+ */
+ ASSERT(old != 0);
+ }
/*
* We have our snapshot; now copy it out.
desc.dtbd_drops = buf->dtb_xamot_drops;
desc.dtbd_errors = buf->dtb_xamot_errors;
desc.dtbd_oldest = 0;
+ desc.dtbd_timestamp = buf->dtb_switched;
lck_mtx_unlock(&dtrace_lock);
size_t module_uuids_list_size;
dtrace_module_uuids_list_t* uuids_list;
uint64_t dtmul_count;
-
+
+ /*
+ * Security restrictions make this operation illegal, if this is enabled DTrace
+ * must refuse to provide any fbt probes.
+ */
+ if (dtrace_fbt_probes_restricted()) {
+ cmn_err(CE_WARN, "security restrictions disallow DTRACEIOC_MODUUIDSLIST");
+ return (EPERM);
+ }
+
/*
* Fail if the kernel symbol mode makes this operation illegal.
* Both NEVER & ALWAYS_FROM_KERNEL are permanent states, it is legal to check
lck_mtx_lock(&mod_lock);
struct modctl* ctl = dtrace_modctl_list;
while (ctl) {
+ /* Update the private probes bit */
+ if (dtrace_provide_private_probes)
+ ctl->mod_flags |= MODCTL_FBT_PROVIDE_PRIVATE_PROBES;
+
ASSERT(!MOD_HAS_USERSPACE_SYMBOLS(ctl));
if (!MOD_SYMBOLS_DONE(ctl)) {
dtmul_count++;
struct modctl* ctl = dtrace_modctl_list;
while (ctl) {
+ /* Update the private probes bit */
+ if (dtrace_provide_private_probes)
+ ctl->mod_flags |= MODCTL_FBT_PROVIDE_PRIVATE_PROBES;
+
/*
* We assume that userspace symbols will be "better" than kernel level symbols,
* as userspace can search for dSYM(s) and symbol'd binaries. Even if kernel syms
size_t module_symbols_size;
dtrace_module_symbols_t* module_symbols;
uint64_t dtmodsyms_count;
-
+
+ /*
+ * Security restrictions make this operation illegal, if this is enabled DTrace
+ * must refuse to provide any fbt probes.
+ */
+ if (dtrace_fbt_probes_restricted()) {
+ cmn_err(CE_WARN, "security restrictions disallow DTRACEIOC_MODUUIDSLIST");
+ return (EPERM);
+ }
+
/*
* Fail if the kernel symbol mode makes this operation illegal.
* Both NEVER & ALWAYS_FROM_KERNEL are permanent states, it is legal to check
/* NOTE! We can no longer exit this method via return */
if (copyin(arg, module_symbols, module_symbols_size) != 0) {
- cmn_err(CE_WARN, "failed copyin of dtrace_module_symbols_t, symbol count %llu", module_symbols->dtmodsyms_count);
+ cmn_err(CE_WARN, "failed copyin of dtrace_module_symbols_t");
rval = EFAULT;
goto module_symbols_cleanup;
}
struct modctl* ctl = dtrace_modctl_list;
while (ctl) {
+ /* Update the private probes bit */
+ if (dtrace_provide_private_probes)
+ ctl->mod_flags |= MODCTL_FBT_PROVIDE_PRIVATE_PROBES;
+
ASSERT(!MOD_HAS_USERSPACE_SYMBOLS(ctl));
if (MOD_HAS_UUID(ctl) && !MOD_SYMBOLS_DONE(ctl)) {
if (memcmp(module_symbols->dtmodsyms_uuid, ctl->mod_uuid, sizeof(UUID)) == 0) {
return rval;
}
-
- default:
- break;
+
+ case DTRACEIOC_PROCWAITFOR: {
+ dtrace_procdesc_t pdesc = {
+ .p_name = {0},
+ .p_pid = -1
+ };
+
+ if ((rval = copyin(arg, &pdesc, sizeof(pdesc))) != 0)
+ goto proc_waitfor_error;
+
+ if ((rval = dtrace_proc_waitfor(&pdesc)) != 0)
+ goto proc_waitfor_error;
+
+ if ((rval = copyout(&pdesc, arg, sizeof(pdesc))) != 0)
+ goto proc_waitfor_error;
+
+ return 0;
+
+ proc_waitfor_error:
+ /* The process was suspended, revert this since the client will not do it. */
+ if (pdesc.p_pid != -1) {
+ proc_t *proc = proc_find(pdesc.p_pid);
+ if (proc != PROC_NULL) {
+ task_pidresume(proc->task);
+ proc_rele(proc);
+ }
+ }
+
+ return rval;
+ }
+
+ default:
+ break;
}
return (ENOTTY);
}
-#endif /* __APPLE__ */
+/*
+ * APPLE NOTE: dtrace_detach not implemented
+ */
#if !defined(__APPLE__)
/*ARGSUSED*/
static int
ASSERT(dtrace_opens == 0);
if (dtrace_helpers > 0) {
- lck_mtx_unlock(&dtrace_provider_lock);
lck_mtx_unlock(&dtrace_lock);
+ lck_mtx_unlock(&dtrace_provider_lock);
lck_mtx_unlock(&cpu_lock);
return (DDI_FAILURE);
}
if (dtrace_unregister((dtrace_provider_id_t)dtrace_provider) != 0) {
- lck_mtx_unlock(&dtrace_provider_lock);
lck_mtx_unlock(&dtrace_lock);
+ lck_mtx_unlock(&dtrace_provider_lock);
lck_mtx_unlock(&cpu_lock);
return (DDI_FAILURE);
}
dtrace_byname = NULL;
kmem_cache_destroy(dtrace_state_cache);
- vmem_destroy(dtrace_minor);
vmem_destroy(dtrace_arena);
if (dtrace_toxrange != NULL) {
return (DDI_SUCCESS);
}
-
-/*ARGSUSED*/
-static int
-dtrace_info(dev_info_t *dip, ddi_info_cmd_t infocmd, void *arg, void **result)
-{
- int error;
-
- switch (infocmd) {
- case DDI_INFO_DEVT2DEVINFO:
- *result = (void *)dtrace_devi;
- error = DDI_SUCCESS;
- break;
- case DDI_INFO_DEVT2INSTANCE:
- *result = (void *)0;
- error = DDI_SUCCESS;
- break;
- default:
- error = DDI_FAILURE;
- }
- return (error);
-}
-
-static struct cb_ops dtrace_cb_ops = {
- dtrace_open, /* open */
- dtrace_close, /* close */
- nulldev, /* strategy */
- nulldev, /* print */
- nodev, /* dump */
- nodev, /* read */
- nodev, /* write */
- dtrace_ioctl, /* ioctl */
- nodev, /* devmap */
- nodev, /* mmap */
- nodev, /* segmap */
- nochpoll, /* poll */
- ddi_prop_op, /* cb_prop_op */
- 0, /* streamtab */
- D_NEW | D_MP /* Driver compatibility flag */
-};
-
-static struct dev_ops dtrace_ops = {
- DEVO_REV, /* devo_rev */
- 0, /* refcnt */
- dtrace_info, /* get_dev_info */
- nulldev, /* identify */
- nulldev, /* probe */
- dtrace_attach, /* attach */
- dtrace_detach, /* detach */
- nodev, /* reset */
- &dtrace_cb_ops, /* driver operations */
- NULL, /* bus operations */
- nodev /* dev power */
-};
-
-static struct modldrv modldrv = {
- &mod_driverops, /* module type (this is a pseudo driver) */
- "Dynamic Tracing", /* name of module */
- &dtrace_ops, /* driver ops */
-};
-
-static struct modlinkage modlinkage = {
- MODREV_1,
- (void *)&modldrv,
- NULL
-};
-
-int
-_init(void)
-{
- return (mod_install(&modlinkage));
-}
-
-int
-_info(struct modinfo *modinfop)
-{
- return (mod_info(&modlinkage, modinfop));
-}
-
-int
-_fini(void)
-{
- return (mod_remove(&modlinkage));
-}
-#else /* Darwin BSD driver model. */
+#endif /* __APPLE__ */
d_open_t _dtrace_open, helper_open;
d_close_t _dtrace_close, helper_close;
#undef HELPER_MAJOR
-/*
- * Called with DEVFS_LOCK held, so vmem_alloc's underlying blist structures are protected.
- */
static int
dtrace_clone_func(dev_t dev, int action)
{
#pragma unused(dev)
if (action == DEVFS_CLONE_ALLOC) {
- if (NULL == dtrace_minor) /* Arena not created yet!?! */
- return 0;
- else {
- /*
- * Propose a minor number, namely the next number that vmem_alloc() will return.
- * Immediately put it back in play by calling vmem_free(). FIXME.
- */
- int ret = (int)(uintptr_t)vmem_alloc(dtrace_minor, 1, VM_BESTFIT | VM_SLEEP);
-
- vmem_free(dtrace_minor, (void *)(uintptr_t)ret, 1);
-
- return ret;
- }
+ return dtrace_state_reserve();
}
else if (action == DEVFS_CLONE_FREE) {
return 0;
else return -1;
}
+void dtrace_ast(void);
+
+void
+dtrace_ast(void)
+{
+ int i;
+ uint32_t clients = atomic_and_32(&dtrace_wake_clients, 0);
+ if (clients == 0)
+ return;
+ /**
+ * We disable preemption here to be sure that we won't get
+ * interrupted by a wakeup to a thread that is higher
+ * priority than us, so that we do issue all wakeups
+ */
+ disable_preemption();
+ for (i = 0; i < DTRACE_NCLIENTS; i++) {
+ if (clients & (1 << i)) {
+ dtrace_state_t *state = dtrace_state_get(i);
+ if (state) {
+ wakeup(state);
+ }
+
+ }
+ }
+ enable_preemption();
+}
+
+
#define DTRACE_MAJOR -24 /* let the kernel pick the device number */
static struct cdevsw dtrace_cdevsw =
{
if (0 == gDTraceInited) {
int i, ncpu;
+ size_t size = sizeof(dtrace_buffer_memory_maxsize);
/*
* DTrace allocates buffers based on the maximum number
*/
ASSERT(dtrace_max_cpus == 0);
ncpu = dtrace_max_cpus = ml_get_max_cpus();
-
+
+ /*
+ * Retrieve the size of the physical memory in order to define
+ * the state buffer memory maximal size. If we cannot retrieve
+ * this value, we'll consider that we have 1Gb of memory per CPU, that's
+ * still better than raising a kernel panic.
+ */
+ if (0 != kernel_sysctlbyname("hw.memsize", &dtrace_buffer_memory_maxsize,
+ &size, NULL, 0))
+ {
+ dtrace_buffer_memory_maxsize = ncpu * 1024 * 1024 * 1024;
+ printf("dtrace_init: failed to retrieve the hw.memsize, defaulted to %lld bytes\n",
+ dtrace_buffer_memory_maxsize);
+ }
+
+ /*
+ * Finally, divide by three to prevent DTrace from eating too
+ * much memory.
+ */
+ dtrace_buffer_memory_maxsize /= 3;
+ ASSERT(dtrace_buffer_memory_maxsize > 0);
+
gMajDevNo = cdevsw_add(DTRACE_MAJOR, &dtrace_cdevsw);
if (gMajDevNo < 0) {
lck_mtx_init(&dtrace_lock, dtrace_lck_grp, dtrace_lck_attr);
lck_mtx_init(&dtrace_provider_lock, dtrace_lck_grp, dtrace_lck_attr);
lck_mtx_init(&dtrace_meta_lock, dtrace_lck_grp, dtrace_lck_attr);
+ lck_mtx_init(&dtrace_procwaitfor_lock, dtrace_lck_grp, dtrace_lck_attr);
#if DEBUG
lck_mtx_init(&dtrace_errlock, dtrace_lck_grp, dtrace_lck_attr);
#endif
* the structure is sized to avoid false sharing.
*/
lck_mtx_init(&cpu_lock, dtrace_lck_grp, dtrace_lck_attr);
+ lck_mtx_init(&cyc_lock, dtrace_lck_grp, dtrace_lck_attr);
lck_mtx_init(&mod_lock, dtrace_lck_grp, dtrace_lck_attr);
+ /*
+ * Initialize the CPU offline/online hooks.
+ */
+ dtrace_install_cpu_hooks();
+
dtrace_modctl_list = NULL;
cpu_core = (cpu_core_t *)kmem_zalloc( ncpu * sizeof(cpu_core_t), KM_SLEEP );
for (i = 0; i < ncpu; ++i) {
cpu_list[i].cpu_id = (processorid_t)i;
cpu_list[i].cpu_next = &(cpu_list[(i+1) % ncpu]);
+ LIST_INIT(&cpu_list[i].cpu_cyc_list);
lck_rw_init(&cpu_list[i].cpu_ft_lock, dtrace_lck_grp, dtrace_lck_attr);
}
lck_mtx_lock(&cpu_lock);
for (i = 0; i < ncpu; ++i)
- /* FIXME: track CPU configuration a la CHUD Processor Pref Pane. */
+ /* FIXME: track CPU configuration */
dtrace_cpu_setup_initial( (processorid_t)i ); /* In lieu of register_cpu_setup_func() callback */
lck_mtx_unlock(&cpu_lock);
(void)dtrace_abs_to_nano(0LL); /* Force once only call to clock_timebase_info (which can take a lock) */
dtrace_isa_init();
-
/*
* See dtrace_impl.h for a description of dof modes.
* The default is lazy dof.
if (!PE_parse_boot_argn("dtrace_kernel_symbol_mode", &dtrace_kernel_symbol_mode, sizeof (dtrace_kernel_symbol_mode))) {
dtrace_kernel_symbol_mode = DTRACE_KERNEL_SYMBOLS_FROM_USERSPACE;
}
-
+
+ dtrace_restriction_policy_load();
+
gDTraceInited = 1;
} else
{
#pragma unused(ignore1,ignore2)
}
-#endif /* __APPLE__ */
projects / apple / xnu.git / blobdiff