*/
/*
- * Copyright 2006 Sun Microsystems, Inc. All rights reserved.
+ * Copyright 2007 Sun Microsystems, Inc. All rights reserved.
* Use is subject to license terms.
*/
#ifndef _SYS_DTRACE_IMPL_H
#define _SYS_DTRACE_IMPL_H
-/* #pragma ident "@(#)dtrace_impl.h 1.21 06/05/19 SMI" */
+/* #pragma ident "@(#)dtrace_impl.h 1.23 07/02/16 SMI" */
#ifdef __cplusplus
extern "C" {
int dtms_ipl; /* cached interrupt pri lev */
int dtms_fltoffs; /* faulting DIFO offset */
uintptr_t dtms_strtok; /* saved strtok() pointer */
+ uint32_t dtms_access; /* memory access rights */
+ dtrace_difo_t *dtms_difo; /* current dif object */
} dtrace_mstate_t;
#define DTRACE_COND_OWNER 0x1
#define DTRACE_PROBEKEY_MAXDEPTH 8 /* max glob recursion depth */
+/*
+ * Access flag used by dtrace_mstate.dtms_access.
+ */
+#define DTRACE_ACCESS_KERNEL 0x1 /* the priv to read kmem */
+
+
/*
* DTrace Activity
*
DTRACE_ACTIVITY_KILLED /* killed */
} dtrace_activity_t;
+#if defined(__APPLE__)
/*
* DTrace dof modes
*
#define DTRACE_DOF_MODE_LAZY_OFF 2
#define DTRACE_DOF_MODE_NON_LAZY 3
+/*
+ * dtrace kernel symbol modes are used to control when the kernel may dispose of
+ * symbol information used by the fbt/sdt provider. The kernel itself, as well as
+ * every kext, has symbol table/nlist info that has historically been preserved
+ * for dtrace's use. This allowed dtrace to be lazy about allocating fbt/sdt probes,
+ * at the expense of keeping the symbol info in the kernel permanently.
+ *
+ * Starting in 10.7+, fbt probes may be created from userspace, in the same
+ * fashion as pid probes. The kernel allows dtrace "first right of refusal"
+ * whenever symbol data becomes available (such as a kext load). If dtrace is
+ * active, it will immediately read/copy the needed data, and then the kernel
+ * may free it. If dtrace is not active, it returns immediately, having done
+ * no work or allocations, and the symbol data is freed. Should dtrace need
+ * this data later, it is expected that the userspace client will push the
+ * data into the kernel via ioctl calls.
+ *
+ * The kernel symbol modes are used to control what dtrace does with symbol data:
+ *
+ * DTRACE_KERNEL_SYMBOLS_NEVER Effectively disables fbt/sdt
+ * DTRACE_KERNEL_SYMBOLS_FROM_KERNEL Immediately read/copy symbol data
+ * DTRACE_KERNEL_SYMBOLS_FROM_USERSPACE Wait for symbols from userspace
+ * DTRACE_KERNEL_SYMBOLS_ALWAYS_FROM_KERNEL Immediately read/copy symbol data
+ *
+ * It is legal to transition between DTRACE_KERNEL_SYMBOLS_FROM_KERNEL and
+ * DTRACE_KERNEL_SYMBOLS_FROM_USERSPACE. The DTRACE_KERNEL_SYMBOLS_NEVER and
+ * DTRACE_KERNEL_SYMBOLS_ALWAYS_FROM_KERNEL are permanent modes, intended to
+ * disable fbt probes entirely, or prevent any symbols being loaded from
+ * userspace.
+*
+ * The kernel symbol mode is kept in dtrace_kernel_symbol_mode, which is protected
+ * by the dtrace_lock.
+ */
+
+#define DTRACE_KERNEL_SYMBOLS_NEVER 0
+#define DTRACE_KERNEL_SYMBOLS_FROM_KERNEL 1
+#define DTRACE_KERNEL_SYMBOLS_FROM_USERSPACE 2
+#define DTRACE_KERNEL_SYMBOLS_ALWAYS_FROM_KERNEL 3
+
+#endif /* __APPLE__ */
+
/*
* DTrace Helper Implementation
*
void *dtpv_arg; /* provider argument */
uint_t dtpv_defunct; /* boolean: defunct provider */
struct dtrace_provider *dtpv_next; /* next provider */
+ uint64_t probe_count; /* no. of associated probes */
+ uint64_t ecb_count; /* no. of associated enabled ECBs */
};
struct dtrace_meta {
/*
* DTrace Error Debugging
*/
-#ifdef DEBUG
+#if DEBUG
#define DTRACE_ERRDEBUG
#endif
} dtrace_toxrange_t;
extern uint64_t dtrace_getarg(int, int);
-extern greg_t dtrace_getfp(void);
extern int dtrace_getipl(void);
extern uintptr_t dtrace_caller(int);
extern uint32_t dtrace_cas32(uint32_t *, uint32_t, uint32_t);
extern void *dtrace_casptr(void *, void *, void *);
#if !defined(__APPLE__)
-extern void dtrace_copyin(uintptr_t, uintptr_t, size_t);
-extern void dtrace_copyinstr(uintptr_t, uintptr_t, size_t);
-extern void dtrace_copyout(uintptr_t, uintptr_t, size_t);
-extern void dtrace_copyoutstr(uintptr_t, uintptr_t, size_t);
+extern void dtrace_copyin(uintptr_t, uintptr_t, size_t, volatile uint16_t *);
+extern void dtrace_copyinstr(uintptr_t, uintptr_t, size_t, volatile uint16_t *);
+extern void dtrace_copyout(uintptr_t, uintptr_t, size_t, volatile uint16_t *);
+extern void dtrace_copyoutstr(uintptr_t, uintptr_t, size_t,
+ volatile uint16_t *);
#else
-extern void dtrace_copyin(user_addr_t, uintptr_t, size_t);
-extern void dtrace_copyinstr(user_addr_t, uintptr_t, size_t);
-extern void dtrace_copyout(uintptr_t, user_addr_t, size_t);
-extern void dtrace_copyoutstr(uintptr_t, user_addr_t, size_t);
+extern void dtrace_copyin(user_addr_t, uintptr_t, size_t, volatile uint16_t *);
+extern void dtrace_copyinstr(user_addr_t, uintptr_t, size_t, volatile uint16_t *);
+extern void dtrace_copyout(uintptr_t, user_addr_t, size_t, volatile uint16_t *);
+extern void dtrace_copyoutstr(uintptr_t, user_addr_t, size_t, volatile uint16_t *);
#endif /* __APPLE__ */
extern void dtrace_getpcstack(pc_t *, int, int, uint32_t *);
#if !defined(__APPLE__)
extern int dtrace_assfail(const char *, const char *, int);
extern int dtrace_attached(void);
extern hrtime_t dtrace_gethrestime(void);
+extern void dtrace_isa_init(void);
#ifdef __sparc
extern void dtrace_flush_windows(void);
extern uint_t dtrace_getfprs(void);
#else
extern void dtrace_copy(uintptr_t, uintptr_t, size_t);
-extern void dtrace_copystr(uintptr_t, uintptr_t, size_t);
+extern void dtrace_copystr(uintptr_t, uintptr_t, size_t, volatile uint16_t *);
#endif
/*
* ASSERT.)
*/
#undef ASSERT
-#ifdef DEBUG
+#if DEBUG
#define ASSERT(EX) ((void)((EX) || \
dtrace_assfail(#EX, __FILE__, __LINE__)))
#else
projects / apple / xnu.git / blobdiff