/*
- * Copyright (c) 2000-2016 Apple Inc. All rights reserved.
+ * Copyright (c) 2000-2019 Apple Inc. All rights reserved.
*
* @Apple_LICENSE_HEADER_START@
*
* @APPLE_OSREFERENCE_LICENSE_HEADER_END@
*/
-#include <machine/spl.h>
-
#include <sys/errno.h>
#include <sys/param.h>
#include <sys/systm.h>
#include <mach/mach_types.h>
#include <mach/mach_time.h>
#include <mach/mach_vm.h>
+#include <machine/atomic.h>
#include <machine/machine_routines.h>
#include <mach/machine.h>
#include <i386/rtclock_protos.h>
#include <i386/mp.h>
#include <i386/machine_routines.h>
+#include <i386/tsc.h>
#endif
#include <kern/clock.h>
#include <sys/fcntl.h>
#include <sys/file_internal.h>
#include <sys/ubc.h>
-#include <sys/param.h> /* for isset() */
+#include <sys/param.h> /* for isset() */
-#include <mach/mach_host.h> /* for host_info() */
+#include <mach/mach_host.h> /* for host_info() */
#include <libkern/OSAtomic.h>
#include <machine/pal_routines.h>
/*
* IOP(s)
*
- * https://coreoswiki.apple.com/wiki/pages/U6z3i0q9/Consistent_Logging_Implementers_Guide.html
- *
* IOP(s) are auxiliary cores that want to participate in kdebug event logging.
* They are registered dynamically. Each is assigned a cpu_id at registration.
*
*/
typedef struct kd_iop {
- kd_callback_t callback;
- uint32_t cpu_id;
- uint64_t last_timestamp; /* Prevent timer rollback */
- struct kd_iop* next;
+ kd_callback_t callback;
+ uint32_t cpu_id;
+ uint64_t last_timestamp; /* Prevent timer rollback */
+ struct kd_iop* next;
} kd_iop_t;
static kd_iop_t* kd_iops = NULL;
*/
#define TYPEFILTER_ALLOC_SIZE MAX(round_page_32(KDBG_TYPEFILTER_BITMAP_SIZE), KDBG_TYPEFILTER_BITMAP_SIZE)
-static typefilter_t typefilter_create(void)
+static typefilter_t
+typefilter_create(void)
{
typefilter_t tf;
if (KERN_SUCCESS == kmem_alloc(kernel_map, (vm_offset_t*)&tf, TYPEFILTER_ALLOC_SIZE, VM_KERN_MEMORY_DIAG)) {
return NULL;
}
-static void typefilter_deallocate(typefilter_t tf)
+static void
+typefilter_deallocate(typefilter_t tf)
{
- assert(tf);
+ assert(tf != NULL);
assert(tf != kdbg_typefilter);
kmem_free(kernel_map, (vm_offset_t)tf, TYPEFILTER_ALLOC_SIZE);
}
-static void typefilter_copy(typefilter_t dst, typefilter_t src)
+static void
+typefilter_copy(typefilter_t dst, typefilter_t src)
{
- assert(src);
- assert(dst);
+ assert(src != NULL);
+ assert(dst != NULL);
memcpy(dst, src, KDBG_TYPEFILTER_BITMAP_SIZE);
}
-static void typefilter_reject_all(typefilter_t tf)
+static void
+typefilter_reject_all(typefilter_t tf)
{
- assert(tf);
+ assert(tf != NULL);
memset(tf, 0, KDBG_TYPEFILTER_BITMAP_SIZE);
}
-static void typefilter_allow_class(typefilter_t tf, uint8_t class)
+static void
+typefilter_allow_all(typefilter_t tf)
+{
+ assert(tf != NULL);
+ memset(tf, ~0, KDBG_TYPEFILTER_BITMAP_SIZE);
+}
+
+static void
+typefilter_allow_class(typefilter_t tf, uint8_t class)
{
- assert(tf);
+ assert(tf != NULL);
const uint32_t BYTES_PER_CLASS = 256 / 8; // 256 subclasses, 1 bit each
memset(&tf[class * BYTES_PER_CLASS], 0xFF, BYTES_PER_CLASS);
}
-static void typefilter_allow_csc(typefilter_t tf, uint16_t csc)
+static void
+typefilter_allow_csc(typefilter_t tf, uint16_t csc)
{
- assert(tf);
+ assert(tf != NULL);
setbit(tf, csc);
}
-static boolean_t typefilter_is_debugid_allowed(typefilter_t tf, uint32_t id)
+static bool
+typefilter_is_debugid_allowed(typefilter_t tf, uint32_t id)
{
- assert(tf);
+ assert(tf != NULL);
return isset(tf, KDBG_EXTRACT_CSC(id));
}
-static mach_port_t typefilter_create_memory_entry(typefilter_t tf)
+static mach_port_t
+typefilter_create_memory_entry(typefilter_t tf)
{
- assert(tf);
+ assert(tf != NULL);
mach_port_t memory_entry = MACH_PORT_NULL;
memory_object_size_t size = TYPEFILTER_ALLOC_SIZE;
mach_make_memory_entry_64(kernel_map,
- &size,
- (memory_object_offset_t)tf,
- VM_PROT_READ,
- &memory_entry,
- MACH_PORT_NULL);
+ &size,
+ (memory_object_offset_t)tf,
+ VM_PROT_READ,
+ &memory_entry,
+ MACH_PORT_NULL);
return memory_entry;
}
* External prototypes
*/
-void task_act_iterate_wth_args(task_t, void(*)(thread_t, void *), void *);
-int cpu_number(void); /* XXX <machine/...> include path broken */
+void task_act_iterate_wth_args(task_t, void (*)(thread_t, void *), void *);
+int cpu_number(void); /* XXX <machine/...> include path broken */
void commpage_update_kdebug_state(void); /* XXX sign */
extern int log_leaks;
-extern boolean_t kdebug_serial;
+
+/*
+ * This flag is for testing purposes only -- it's highly experimental and tools
+ * have not been updated to support it.
+ */
+static bool kdbg_continuous_time = false;
+
+static inline uint64_t
+kdbg_timestamp(void)
+{
+ if (kdbg_continuous_time) {
+ return mach_continuous_time();
+ } else {
+ return mach_absolute_time();
+ }
+}
+
+static int kdbg_debug = 0;
#if KDEBUG_MOJO_TRACE
#include <sys/kdebugevents.h>
static void kdebug_serial_print( /* forward */
- uint32_t, uint32_t, uint64_t,
- uintptr_t, uintptr_t, uintptr_t, uintptr_t, uintptr_t);
+ uint32_t, uint32_t, uint64_t,
+ uintptr_t, uintptr_t, uintptr_t, uintptr_t, uintptr_t);
#endif
int kdbg_control(int *, u_int, user_addr_t, size_t *);
static int kdbg_setpidex(kd_regtype *);
static int kdbg_setpid(kd_regtype *);
static void kdbg_thrmap_init(void);
-static int kdbg_reinit(boolean_t);
-static int kdbg_bootstrap(boolean_t);
-static int kdbg_test(void);
+static int kdbg_reinit(bool);
+static int kdbg_bootstrap(bool);
+static int kdbg_test(size_t flavor);
-static int kdbg_write_v1_header(boolean_t write_thread_map, vnode_t vp, vfs_context_t ctx);
+static int kdbg_write_v1_header(bool write_thread_map, vnode_t vp, vfs_context_t ctx);
static int kdbg_write_thread_map(vnode_t vp, vfs_context_t ctx);
static int kdbg_copyout_thread_map(user_addr_t buffer, size_t *buffer_size);
static void kdbg_clear_thread_map(void);
-static boolean_t kdbg_wait(uint64_t timeout_ms, boolean_t locked_wait);
+static bool kdbg_wait(uint64_t timeout_ms, bool locked_wait);
static void kdbg_wakeup(void);
int kdbg_cpumap_init_internal(kd_iop_t* iops, uint32_t cpu_count,
- uint8_t** cpumap, uint32_t* cpumap_size);
+ uint8_t** cpumap, uint32_t* cpumap_size);
static kd_threadmap *kdbg_thrmap_init_internal(unsigned int count,
- unsigned int *mapsize,
- unsigned int *mapcount);
+ unsigned int *mapsize,
+ unsigned int *mapcount);
-static boolean_t kdebug_current_proc_enabled(uint32_t debugid);
-boolean_t kdebug_debugid_enabled(uint32_t debugid);
+static bool kdebug_current_proc_enabled(uint32_t debugid);
static errno_t kdebug_check_trace_string(uint32_t debugid, uint64_t str_id);
int kdbg_write_v3_header(user_addr_t, size_t *, int);
int kdbg_write_v3_chunk_header(user_addr_t buffer, uint32_t tag,
- uint32_t sub_tag, uint64_t length,
- vnode_t vp, vfs_context_t ctx);
+ uint32_t sub_tag, uint64_t length,
+ vnode_t vp, vfs_context_t ctx);
user_addr_t kdbg_write_v3_event_chunk_header(user_addr_t buffer, uint32_t tag,
- uint64_t length, vnode_t vp,
- vfs_context_t ctx);
+ uint64_t length, vnode_t vp,
+ vfs_context_t ctx);
// Helper functions
-static int create_buffers(boolean_t);
+static int create_buffers(bool);
static void delete_buffers(void);
extern int tasks_count;
extern int threads_count;
-extern char *proc_best_name(proc_t p);
extern void IOSleep(int);
/* trace enable status */
unsigned int kdebug_enable = 0;
/* A static buffer to record events prior to the start of regular logging */
-#define KD_EARLY_BUFFER_MAX 64
-static kd_buf kd_early_buffer[KD_EARLY_BUFFER_MAX];
-static int kd_early_index = 0;
-static boolean_t kd_early_overflow = FALSE;
+
+#define KD_EARLY_BUFFER_SIZE (16 * 1024)
+#define KD_EARLY_BUFFER_NBUFS (KD_EARLY_BUFFER_SIZE / sizeof(kd_buf))
+#if CONFIG_EMBEDDED
+/*
+ * On embedded, the space for this is carved out by osfmk/arm/data.s -- clang
+ * has problems aligning to greater than 4K.
+ */
+extern kd_buf kd_early_buffer[KD_EARLY_BUFFER_NBUFS];
+#else /* CONFIG_EMBEDDED */
+__attribute__((aligned(KD_EARLY_BUFFER_SIZE)))
+static kd_buf kd_early_buffer[KD_EARLY_BUFFER_NBUFS];
+#endif /* !CONFIG_EMBEDDED */
+
+static unsigned int kd_early_index = 0;
+static bool kd_early_overflow = false;
+static bool kd_early_done = false;
#define SLOW_NOLOG 0x01
#define SLOW_CHECKS 0x02
-#define EVENTS_PER_STORAGE_UNIT 2048
-#define MIN_STORAGE_UNITS_PER_CPU 4
+#define EVENTS_PER_STORAGE_UNIT 2048
+#define MIN_STORAGE_UNITS_PER_CPU 4
#define POINTER_FROM_KDS_PTR(x) (&kd_bufs[x.buffer_index].kdsb_addr[x.offset])
};
struct kd_storage {
- union kds_ptr kds_next;
+ union kds_ptr kds_next;
uint32_t kds_bufindx;
uint32_t kds_bufcnt;
uint32_t kds_readlast;
- boolean_t kds_lostevents;
+ bool kds_lostevents;
uint64_t kds_timestamp;
- kd_buf kds_records[EVENTS_PER_STORAGE_UNIT];
+ kd_buf kds_records[EVENTS_PER_STORAGE_UNIT];
};
-#define MAX_BUFFER_SIZE (1024 * 1024 * 128)
-#define N_STORAGE_UNITS_PER_BUFFER (MAX_BUFFER_SIZE / sizeof(struct kd_storage))
+#define MAX_BUFFER_SIZE (1024 * 1024 * 128)
+#define N_STORAGE_UNITS_PER_BUFFER (MAX_BUFFER_SIZE / sizeof(struct kd_storage))
+static_assert(N_STORAGE_UNITS_PER_BUFFER <= 0x7ff,
+ "shoudn't overflow kds_ptr.offset");
struct kd_storage_buffers {
- struct kd_storage *kdsb_addr;
- uint32_t kdsb_size;
+ struct kd_storage *kdsb_addr;
+ uint32_t kdsb_size;
};
#define KDS_PTR_NULL 0xffffffff
struct kd_storage_buffers *kd_bufs = NULL;
-int n_storage_units = 0;
-int n_storage_buffers = 0;
-int n_storage_threshold = 0;
-int kds_waiter = 0;
+int n_storage_units = 0;
+unsigned int n_storage_buffers = 0;
+int n_storage_threshold = 0;
+int kds_waiter = 0;
#pragma pack(0)
struct kd_bufinfo {
union kds_ptr kd_list_head;
union kds_ptr kd_list_tail;
- boolean_t kd_lostevents;
+ bool kd_lostevents;
uint32_t _pad;
uint64_t kd_prev_timebase;
uint32_t num_bufs;
-} __attribute__(( aligned(MAX_CPU_CACHE_LINE_SIZE) ));
+} __attribute__((aligned(MAX_CPU_CACHE_LINE_SIZE)));
/*
*/
struct kd_ctrl_page_t {
union kds_ptr kds_free_list;
- uint32_t enabled :1;
- uint32_t _pad0 :31;
- int kds_inuse_count;
+ uint32_t enabled :1;
+ uint32_t _pad0 :31;
+ int kds_inuse_count;
uint32_t kdebug_flags;
uint32_t kdebug_slowcheck;
uint64_t oldest_time;
struct kd_bufinfo *kdbip = NULL;
-#define KDCOPYBUF_COUNT 8192
-#define KDCOPYBUF_SIZE (KDCOPYBUF_COUNT * sizeof(kd_buf))
+#define KDCOPYBUF_COUNT 8192
+#define KDCOPYBUF_SIZE (KDCOPYBUF_COUNT * sizeof(kd_buf))
-#define PAGE_4KB 4096
-#define PAGE_16KB 16384
+#define PAGE_4KB 4096
+#define PAGE_16KB 16384
kd_buf *kdcopybuf = NULL;
unsigned int nkdbufs = 0;
-unsigned int kdlog_beg=0;
-unsigned int kdlog_end=0;
-unsigned int kdlog_value1=0;
-unsigned int kdlog_value2=0;
-unsigned int kdlog_value3=0;
-unsigned int kdlog_value4=0;
+unsigned int kdlog_beg = 0;
+unsigned int kdlog_end = 0;
+unsigned int kdlog_value1 = 0;
+unsigned int kdlog_value2 = 0;
+unsigned int kdlog_value3 = 0;
+unsigned int kdlog_value4 = 0;
static lck_spin_t * kdw_spin_lock;
static lck_spin_t * kds_spin_lock;
unsigned int kd_mapsize = 0;
unsigned int kd_mapcount = 0;
-off_t RAW_file_offset = 0;
-int RAW_file_written = 0;
+off_t RAW_file_offset = 0;
+int RAW_file_written = 0;
-#define RAW_FLUSH_SIZE (2 * 1024 * 1024)
+#define RAW_FLUSH_SIZE (2 * 1024 * 1024)
/*
* A globally increasing counter for identifying strings in trace. Starts at
*/
static uint64_t g_str_id_signature = (0x70acULL << STR_ID_SIG_OFFSET);
-#define INTERRUPT 0x01050000
-#define MACH_vmfault 0x01300008
-#define BSC_SysCall 0x040c0000
-#define MACH_SysCall 0x010c0000
+#define INTERRUPT 0x01050000
+#define MACH_vmfault 0x01300008
+#define BSC_SysCall 0x040c0000
+#define MACH_SysCall 0x010c0000
/* task to string structure */
-struct tts
-{
- task_t task; /* from procs task */
- pid_t pid; /* from procs p_pid */
- char task_comm[20]; /* from procs p_comm */
+struct tts {
+ task_t task; /* from procs task */
+ pid_t pid; /* from procs p_pid */
+ char task_comm[20];/* from procs p_comm */
};
typedef struct tts tts_t;
-struct krt
-{
+struct krt {
kd_threadmap *map; /* pointer to the map buffer */
int count;
int maxcount;
struct tts *atts;
};
+/*
+ * TRACE file formats...
+ *
+ * RAW_VERSION0
+ *
+ * uint32_t #threadmaps
+ * kd_threadmap[]
+ * kd_buf[]
+ *
+ * RAW_VERSION1
+ *
+ * RAW_header, with version_no set to RAW_VERSION1
+ * kd_threadmap[]
+ * Empty space to pad alignment to the nearest page boundary.
+ * kd_buf[]
+ *
+ * RAW_VERSION1+
+ *
+ * RAW_header, with version_no set to RAW_VERSION1
+ * kd_threadmap[]
+ * kd_cpumap_header, with version_no set to RAW_VERSION1
+ * kd_cpumap[]
+ * Empty space to pad alignment to the nearest page boundary.
+ * kd_buf[]
+ *
+ * V1+ implementation details...
+ *
+ * It would have been nice to add the cpumap data "correctly", but there were
+ * several obstacles. Existing code attempts to parse both V1 and V0 files.
+ * Due to the fact that V0 has no versioning or header, the test looks like
+ * this:
+ *
+ * // Read header
+ * if (header.version_no != RAW_VERSION1) { // Assume V0 }
+ *
+ * If we add a VERSION2 file format, all existing code is going to treat that
+ * as a VERSION0 file when reading it, and crash terribly when trying to read
+ * RAW_VERSION2 threadmap entries.
+ *
+ * To differentiate between a V1 and V1+ file, read as V1 until you reach
+ * the padding bytes. Then:
+ *
+ * boolean_t is_v1plus = FALSE;
+ * if (padding_bytes >= sizeof(kd_cpumap_header)) {
+ * kd_cpumap_header header = // read header;
+ * if (header.version_no == RAW_VERSION1) {
+ * is_v1plus = TRUE;
+ * }
+ * }
+ *
+ */
+
+#define RAW_VERSION3 0x00001000
+
+// Version 3 header
+// The header chunk has the tag 0x00001000 which also serves as a magic word
+// that identifies the file as a version 3 trace file. The header payload is
+// a set of fixed fields followed by a variable number of sub-chunks:
+/*
+ * ____________________________________________________________________________
+ | Offset | Size | Field |
+ | ----------------------------------------------------------------------------
+ | 0 | 4 | Tag (0x00001000) |
+ | 4 | 4 | Sub-tag. Represents the version of the header. |
+ | 8 | 8 | Length of header payload (40+8x) |
+ | 16 | 8 | Time base info. Two 32-bit numbers, numer/denom, |
+ | | | for converting timestamps to nanoseconds. |
+ | 24 | 8 | Timestamp of trace start. |
+ | 32 | 8 | Wall time seconds since Unix epoch. |
+ | | | As returned by gettimeofday(). |
+ | 40 | 4 | Wall time microseconds. As returned by gettimeofday(). |
+ | 44 | 4 | Local time zone offset in minutes. ( " ) |
+ | 48 | 4 | Type of daylight savings time correction to apply. ( " ) |
+ | 52 | 4 | Flags. 1 = 64-bit. Remaining bits should be written |
+ | | | as 0 and ignored when reading. |
+ | 56 | 8x | Variable number of sub-chunks. None are required. |
+ | | | Ignore unknown chunks. |
+ | ----------------------------------------------------------------------------
+ */
+// NOTE: The header sub-chunks are considered part of the header chunk,
+// so they must be included in the header chunk’s length field.
+// The CPU map is an optional sub-chunk of the header chunk. It provides
+// information about the CPUs that are referenced from the trace events.
+typedef struct {
+ uint32_t tag;
+ uint32_t sub_tag;
+ uint64_t length;
+ uint32_t timebase_numer;
+ uint32_t timebase_denom;
+ uint64_t timestamp;
+ uint64_t walltime_secs;
+ uint32_t walltime_usecs;
+ uint32_t timezone_minuteswest;
+ uint32_t timezone_dst;
+ uint32_t flags;
+} __attribute__((packed)) kd_header_v3;
+
+typedef struct {
+ uint32_t tag;
+ uint32_t sub_tag;
+ uint64_t length;
+} __attribute__((packed)) kd_chunk_header_v3;
+
+#define V3_CONFIG 0x00001b00
+#define V3_CPU_MAP 0x00001c00
+#define V3_THREAD_MAP 0x00001d00
+#define V3_RAW_EVENTS 0x00001e00
+#define V3_NULL_CHUNK 0x00002000
+
+// The current version of all kernel managed chunks is 1. The
+// V3_CURRENT_CHUNK_VERSION is added to ease the simple case
+// when most/all the kernel managed chunks have the same version.
+
+#define V3_CURRENT_CHUNK_VERSION 1
+#define V3_HEADER_VERSION V3_CURRENT_CHUNK_VERSION
+#define V3_CPUMAP_VERSION V3_CURRENT_CHUNK_VERSION
+#define V3_THRMAP_VERSION V3_CURRENT_CHUNK_VERSION
+#define V3_EVENT_DATA_VERSION V3_CURRENT_CHUNK_VERSION
+
typedef struct krt krt_t;
static uint32_t
-kdbg_cpu_count(boolean_t early_trace)
+kdbg_cpu_count(bool early_trace)
{
if (early_trace) {
+#if CONFIG_EMBEDDED
+ return ml_get_cpu_count();
+#else
return max_ncpus;
+#endif
}
host_basic_info_data_t hinfo;
}
#if MACH_ASSERT
+#if CONFIG_EMBEDDED
+static bool
+kdbg_iop_list_is_valid(kd_iop_t* iop)
+{
+ if (iop) {
+ /* Is list sorted by cpu_id? */
+ kd_iop_t* temp = iop;
+ do {
+ assert(!temp->next || temp->next->cpu_id == temp->cpu_id - 1);
+ assert(temp->next || (temp->cpu_id == kdbg_cpu_count(false) || temp->cpu_id == kdbg_cpu_count(true)));
+ } while ((temp = temp->next));
+
+ /* Does each entry have a function and a name? */
+ temp = iop;
+ do {
+ assert(temp->callback.func);
+ assert(strlen(temp->callback.iop_name) < sizeof(temp->callback.iop_name));
+ } while ((temp = temp->next));
+ }
+
+ return true;
+}
+
+static bool
+kdbg_iop_list_contains_cpu_id(kd_iop_t* list, uint32_t cpu_id)
+{
+ while (list) {
+ if (list->cpu_id == cpu_id) {
+ return true;
+ }
+ list = list->next;
+ }
+
+ return false;
+}
+#endif /* CONFIG_EMBEDDED */
#endif /* MACH_ASSERT */
static void
}
}
+static lck_grp_t *kdebug_lck_grp = NULL;
+
static void
-kdbg_set_tracing_enabled(boolean_t enabled, uint32_t trace_type)
+kdbg_set_tracing_enabled(bool enabled, uint32_t trace_type)
{
- int s = ml_set_interrupts_enabled(FALSE);
- lck_spin_lock(kds_spin_lock);
+ /*
+ * Drain any events from IOPs before making the state change. On
+ * enabling, this removes any stale events from before tracing. On
+ * disabling, this saves any events up to the point tracing is disabled.
+ */
+ kdbg_iop_list_callback(kd_ctrl_page.kdebug_iops, KD_CALLBACK_SYNC_FLUSH,
+ NULL);
+
+ int s = ml_set_interrupts_enabled(false);
+ lck_spin_lock_grp(kds_spin_lock, kdebug_lck_grp);
+
if (enabled) {
+ /*
+ * The oldest valid time is now; reject past events from IOPs.
+ */
+ kd_ctrl_page.oldest_time = kdbg_timestamp();
kdebug_enable |= trace_type;
kd_ctrl_page.kdebug_slowcheck &= ~SLOW_NOLOG;
kd_ctrl_page.enabled = 1;
commpage_update_kdebug_state();
} else {
- kdebug_enable &= ~(KDEBUG_ENABLE_TRACE|KDEBUG_ENABLE_PPT);
+ kdebug_enable &= ~(KDEBUG_ENABLE_TRACE | KDEBUG_ENABLE_PPT);
kd_ctrl_page.kdebug_slowcheck |= SLOW_NOLOG;
kd_ctrl_page.enabled = 0;
commpage_update_kdebug_state();
ml_set_interrupts_enabled(s);
if (enabled) {
- kdbg_iop_list_callback(kd_ctrl_page.kdebug_iops, KD_CALLBACK_KDEBUG_ENABLED, NULL);
+ kdbg_iop_list_callback(kd_ctrl_page.kdebug_iops,
+ KD_CALLBACK_KDEBUG_ENABLED, NULL);
} else {
- /*
- * If you do not flush the IOP trace buffers, they can linger
- * for a considerable period; consider code which disables and
- * deallocates without a final sync flush.
- */
- kdbg_iop_list_callback(kd_ctrl_page.kdebug_iops, KD_CALLBACK_KDEBUG_DISABLED, NULL);
- kdbg_iop_list_callback(kd_ctrl_page.kdebug_iops, KD_CALLBACK_SYNC_FLUSH, NULL);
+ kdbg_iop_list_callback(kd_ctrl_page.kdebug_iops,
+ KD_CALLBACK_KDEBUG_DISABLED, NULL);
}
}
static void
-kdbg_set_flags(int slowflag, int enableflag, boolean_t enabled)
+kdbg_set_flags(int slowflag, int enableflag, bool enabled)
{
- int s = ml_set_interrupts_enabled(FALSE);
- lck_spin_lock(kds_spin_lock);
+ int s = ml_set_interrupts_enabled(false);
+ lck_spin_lock_grp(kds_spin_lock, kdebug_lck_grp);
if (enabled) {
kd_ctrl_page.kdebug_slowcheck |= slowflag;
kd_ctrl_page.kdebug_slowcheck &= ~slowflag;
kdebug_enable &= ~enableflag;
}
-
+
lck_spin_unlock(kds_spin_lock);
ml_set_interrupts_enabled(s);
}
/*
* Disable wrapping and return true if trace wrapped, false otherwise.
*/
-boolean_t
+static bool
disable_wrap(uint32_t *old_slowcheck, uint32_t *old_flags)
{
- boolean_t wrapped;
- int s = ml_set_interrupts_enabled(FALSE);
- lck_spin_lock(kds_spin_lock);
+ bool wrapped;
+ int s = ml_set_interrupts_enabled(false);
+ lck_spin_lock_grp(kds_spin_lock, kdebug_lck_grp);
*old_slowcheck = kd_ctrl_page.kdebug_slowcheck;
*old_flags = kd_ctrl_page.kdebug_flags;
return wrapped;
}
-void
-enable_wrap(uint32_t old_slowcheck, boolean_t lostevents)
+static void
+enable_wrap(uint32_t old_slowcheck)
{
- int s = ml_set_interrupts_enabled(FALSE);
- lck_spin_lock(kds_spin_lock);
+ int s = ml_set_interrupts_enabled(false);
+ lck_spin_lock_grp(kds_spin_lock, kdebug_lck_grp);
kd_ctrl_page.kdebug_flags &= ~KDBG_NOWRAP;
- if ( !(old_slowcheck & SLOW_NOLOG))
+ if (!(old_slowcheck & SLOW_NOLOG)) {
kd_ctrl_page.kdebug_slowcheck &= ~SLOW_NOLOG;
-
- if (lostevents == TRUE)
- kd_ctrl_page.kdebug_flags |= KDBG_WRAPPED;
+ }
lck_spin_unlock(kds_spin_lock);
ml_set_interrupts_enabled(s);
}
static int
-create_buffers(boolean_t early_trace)
+create_buffers(bool early_trace)
{
- int i;
- int p_buffer_size;
- int f_buffer_size;
- int f_buffers;
+ unsigned int i;
+ unsigned int p_buffer_size;
+ unsigned int f_buffer_size;
+ unsigned int f_buffers;
int error = 0;
/*
*/
kd_ctrl_page.kdebug_iops = kd_iops;
+#if CONFIG_EMBEDDED
+ assert(kdbg_iop_list_is_valid(kd_ctrl_page.kdebug_iops));
+#endif
/*
* If the list is valid, it is sorted, newest -> oldest. Each iop entry
goto out;
}
- if (nkdbufs < (kd_ctrl_page.kdebug_cpus * EVENTS_PER_STORAGE_UNIT * MIN_STORAGE_UNITS_PER_CPU))
+ if (nkdbufs < (kd_ctrl_page.kdebug_cpus * EVENTS_PER_STORAGE_UNIT * MIN_STORAGE_UNITS_PER_CPU)) {
n_storage_units = kd_ctrl_page.kdebug_cpus * MIN_STORAGE_UNITS_PER_CPU;
- else
+ } else {
n_storage_units = nkdbufs / EVENTS_PER_STORAGE_UNIT;
+ }
nkdbufs = n_storage_units * EVENTS_PER_STORAGE_UNIT;
f_buffer_size = N_STORAGE_UNITS_PER_BUFFER * sizeof(struct kd_storage);
p_buffer_size = (n_storage_units % N_STORAGE_UNITS_PER_BUFFER) * sizeof(struct kd_storage);
- if (p_buffer_size)
+ if (p_buffer_size) {
n_storage_buffers++;
+ }
kd_bufs = NULL;
if (kdcopybuf == 0) {
- if (kmem_alloc(kernel_map, (vm_offset_t *)&kdcopybuf, (vm_size_t)KDCOPYBUF_SIZE, VM_KERN_MEMORY_DIAG) != KERN_SUCCESS) {
+ if (kmem_alloc(kernel_map, (vm_offset_t *)&kdcopybuf, (vm_size_t)KDCOPYBUF_SIZE, VM_KERN_MEMORY_DIAG) != KERN_SUCCESS) {
error = ENOSPC;
goto out;
}
for (i = 0; i < n_storage_buffers; i++) {
struct kd_storage *kds;
- int n_elements;
- int n;
+ int n_elements;
+ int n;
n_elements = kd_bufs[i].kdsb_size / sizeof(struct kd_storage);
kds = kd_bufs[i].kdsb_addr;
bzero((char *)kdbip, sizeof(struct kd_bufinfo) * kd_ctrl_page.kdebug_cpus);
- for (i = 0; i < (int)kd_ctrl_page.kdebug_cpus; i++) {
+ for (i = 0; i < kd_ctrl_page.kdebug_cpus; i++) {
kdbip[i].kd_list_head.raw = KDS_PTR_NULL;
kdbip[i].kd_list_tail.raw = KDS_PTR_NULL;
- kdbip[i].kd_lostevents = FALSE;
+ kdbip[i].kd_lostevents = false;
kdbip[i].num_bufs = 0;
}
-
+
kd_ctrl_page.kdebug_flags |= KDBG_BUFINIT;
kd_ctrl_page.kds_inuse_count = 0;
n_storage_threshold = n_storage_units / 2;
out:
- if (error)
+ if (error) {
delete_buffers();
+ }
- return(error);
+ return error;
}
static void
delete_buffers(void)
{
- int i;
-
+ unsigned int i;
+
if (kd_bufs) {
for (i = 0; i < n_storage_buffers; i++) {
if (kd_bufs[i].kdsb_addr) {
if (kdbip) {
kmem_free(kernel_map, (vm_offset_t)kdbip, sizeof(struct kd_bufinfo) * kd_ctrl_page.kdebug_cpus);
-
+
kdbip = NULL;
}
- kd_ctrl_page.kdebug_iops = NULL;
+ kd_ctrl_page.kdebug_iops = NULL;
kd_ctrl_page.kdebug_cpus = 0;
kd_ctrl_page.kdebug_flags &= ~KDBG_BUFINIT;
}
release_storage_unit(int cpu, uint32_t kdsp_raw)
{
int s = 0;
- struct kd_storage *kdsp_actual;
+ struct kd_storage *kdsp_actual;
struct kd_bufinfo *kdbp;
union kds_ptr kdsp;
kdsp.raw = kdsp_raw;
- s = ml_set_interrupts_enabled(FALSE);
- lck_spin_lock(kds_spin_lock);
+ s = ml_set_interrupts_enabled(false);
+ lck_spin_lock_grp(kds_spin_lock, kdebug_lck_grp);
kdbp = &kdbip[cpu];
* it's possible for the storage unit pointed to
* by kdsp to have already been stolen... so
* check to see if it's still the head of the list
- * now that we're behind the lock that protects
+ * now that we're behind the lock that protects
* adding and removing from the queue...
* since we only ever release and steal units from
* that position, if it's no longer the head
ml_set_interrupts_enabled(s);
}
-
-boolean_t
+bool
allocate_storage_unit(int cpu)
{
union kds_ptr kdsp;
struct kd_storage *kdsp_actual, *kdsp_next_actual;
struct kd_bufinfo *kdbp, *kdbp_vict, *kdbp_try;
uint64_t oldest_ts, ts;
- boolean_t retval = TRUE;
+ bool retval = true;
int s = 0;
- s = ml_set_interrupts_enabled(FALSE);
- lck_spin_lock(kds_spin_lock);
+ s = ml_set_interrupts_enabled(false);
+ lck_spin_lock_grp(kds_spin_lock, kdebug_lck_grp);
kdbp = &kdbip[cpu];
if (kdbp->kd_list_tail.raw != KDS_PTR_NULL) {
kdsp_actual = POINTER_FROM_KDS_PTR(kdbp->kd_list_tail);
- if (kdsp_actual->kds_bufindx < EVENTS_PER_STORAGE_UNIT)
+ if (kdsp_actual->kds_bufindx < EVENTS_PER_STORAGE_UNIT) {
goto out;
+ }
}
-
+
if ((kdsp = kd_ctrl_page.kds_free_list).raw != KDS_PTR_NULL) {
+ /*
+ * If there's a free page, grab it from the free list.
+ */
kdsp_actual = POINTER_FROM_KDS_PTR(kdsp);
kd_ctrl_page.kds_free_list = kdsp_actual->kds_next;
kd_ctrl_page.kds_inuse_count++;
} else {
+ /*
+ * Otherwise, we're going to lose events and repurpose the oldest
+ * storage unit we can find.
+ */
if (kd_ctrl_page.kdebug_flags & KDBG_NOWRAP) {
kd_ctrl_page.kdebug_slowcheck |= SLOW_NOLOG;
- kdbp->kd_lostevents = TRUE;
- retval = FALSE;
+ kdbp->kd_lostevents = true;
+ retval = false;
goto out;
}
kdbp_vict = NULL;
oldest_ts = UINT64_MAX;
for (kdbp_try = &kdbip[0]; kdbp_try < &kdbip[kd_ctrl_page.kdebug_cpus]; kdbp_try++) {
-
if (kdbp_try->kd_list_head.raw == KDS_PTR_NULL) {
/*
* no storage unit to steal
kdebug_enable = 0;
kd_ctrl_page.enabled = 0;
commpage_update_kdebug_state();
- retval = FALSE;
+ retval = false;
goto out;
}
kdsp = kdbp_vict->kd_list_head;
if (kdbp_vict->kd_list_head.raw != KDS_PTR_NULL) {
kdsp_next_actual = POINTER_FROM_KDS_PTR(kdbp_vict->kd_list_head);
- kdsp_next_actual->kds_lostevents = TRUE;
- } else
- kdbp_vict->kd_lostevents = TRUE;
+ kdsp_next_actual->kds_lostevents = true;
+ } else {
+ kdbp_vict->kd_lostevents = true;
+ }
- kd_ctrl_page.oldest_time = oldest_ts;
+ if (kd_ctrl_page.oldest_time < oldest_ts) {
+ kd_ctrl_page.oldest_time = oldest_ts;
+ }
kd_ctrl_page.kdebug_flags |= KDBG_WRAPPED;
}
- kdsp_actual->kds_timestamp = mach_absolute_time();
+ kdsp_actual->kds_timestamp = kdbg_timestamp();
kdsp_actual->kds_next.raw = KDS_PTR_NULL;
- kdsp_actual->kds_bufcnt = 0;
+ kdsp_actual->kds_bufcnt = 0;
kdsp_actual->kds_readlast = 0;
kdsp_actual->kds_lostevents = kdbp->kd_lostevents;
- kdbp->kd_lostevents = FALSE;
- kdsp_actual->kds_bufindx = 0;
+ kdbp->kd_lostevents = false;
+ kdsp_actual->kds_bufindx = 0;
- if (kdbp->kd_list_head.raw == KDS_PTR_NULL)
+ if (kdbp->kd_list_head.raw == KDS_PTR_NULL) {
kdbp->kd_list_head = kdsp;
- else
+ } else {
POINTER_FROM_KDS_PTR(kdbp->kd_list_tail)->kds_next = kdsp;
+ }
kdbp->kd_list_tail = kdsp;
out:
lck_spin_unlock(kds_spin_lock);
ml_set_interrupts_enabled(s);
- return (retval);
+ return retval;
}
int
kd_iop_t* iop;
if (kmem_alloc(kernel_map, (vm_offset_t *)&iop, sizeof(kd_iop_t), VM_KERN_MEMORY_DIAG) == KERN_SUCCESS) {
memcpy(&iop->callback, &callback, sizeof(kd_callback_t));
-
+
/*
* <rdar://problem/13351477> Some IOP clients are not providing a name.
*
* Remove when fixed.
*/
{
- boolean_t is_valid_name = FALSE;
- for (uint32_t length=0; length<sizeof(callback.iop_name); ++length) {
+ bool is_valid_name = false;
+ for (uint32_t length = 0; length < sizeof(callback.iop_name); ++length) {
/* This is roughly isprintable(c) */
- if (callback.iop_name[length] > 0x20 && callback.iop_name[length] < 0x7F)
+ if (callback.iop_name[length] > 0x20 && callback.iop_name[length] < 0x7F) {
continue;
+ }
if (callback.iop_name[length] == 0) {
- if (length)
- is_valid_name = TRUE;
+ if (length) {
+ is_valid_name = true;
+ }
break;
}
}
-
+
if (!is_valid_name) {
strlcpy(iop->callback.iop_name, "IOP-???", sizeof(iop->callback.iop_name));
}
}
iop->last_timestamp = 0;
-
+
do {
/*
* We use two pieces of state, the old list head
* TLDR; Must not read kd_iops more than once per loop.
*/
iop->next = kd_iops;
- iop->cpu_id = iop->next ? (iop->next->cpu_id+1) : kdbg_cpu_count(FALSE);
+ iop->cpu_id = iop->next ? (iop->next->cpu_id + 1) : kdbg_cpu_count(false);
/*
* Header says OSCompareAndSwapPtr has a memory barrier
void
kernel_debug_enter(
- uint32_t coreid,
- uint32_t debugid,
- uint64_t timestamp,
- uintptr_t arg1,
- uintptr_t arg2,
- uintptr_t arg3,
- uintptr_t arg4,
- uintptr_t threadid
+ uint32_t coreid,
+ uint32_t debugid,
+ uint64_t timestamp,
+ uintptr_t arg1,
+ uintptr_t arg2,
+ uintptr_t arg3,
+ uintptr_t arg4,
+ uintptr_t threadid
)
{
- uint32_t bindx;
- kd_buf *kd;
+ uint32_t bindx;
+ kd_buf *kd;
struct kd_bufinfo *kdbp;
struct kd_storage *kdsp_actual;
union kds_ptr kds_raw;
if (kd_ctrl_page.kdebug_slowcheck) {
-
- if ( (kd_ctrl_page.kdebug_slowcheck & SLOW_NOLOG) || !(kdebug_enable & (KDEBUG_ENABLE_TRACE|KDEBUG_ENABLE_PPT)))
+ if ((kd_ctrl_page.kdebug_slowcheck & SLOW_NOLOG) || !(kdebug_enable & (KDEBUG_ENABLE_TRACE | KDEBUG_ENABLE_PPT))) {
goto out1;
-
+ }
+
if (kd_ctrl_page.kdebug_flags & KDBG_TYPEFILTER_CHECK) {
- if (typefilter_is_debugid_allowed(kdbg_typefilter, debugid))
+ if (typefilter_is_debugid_allowed(kdbg_typefilter, debugid)) {
goto record_event;
+ }
goto out1;
- }
- else if (kd_ctrl_page.kdebug_flags & KDBG_RANGECHECK) {
- if (debugid >= kdlog_beg && debugid <= kdlog_end)
+ } else if (kd_ctrl_page.kdebug_flags & KDBG_RANGECHECK) {
+ if (debugid >= kdlog_beg && debugid <= kdlog_end) {
goto record_event;
+ }
goto out1;
- }
- else if (kd_ctrl_page.kdebug_flags & KDBG_VALCHECK) {
+ } else if (kd_ctrl_page.kdebug_flags & KDBG_VALCHECK) {
if ((debugid & KDBG_EVENTID_MASK) != kdlog_value1 &&
- (debugid & KDBG_EVENTID_MASK) != kdlog_value2 &&
- (debugid & KDBG_EVENTID_MASK) != kdlog_value3 &&
- (debugid & KDBG_EVENTID_MASK) != kdlog_value4)
+ (debugid & KDBG_EVENTID_MASK) != kdlog_value2 &&
+ (debugid & KDBG_EVENTID_MASK) != kdlog_value3 &&
+ (debugid & KDBG_EVENTID_MASK) != kdlog_value4) {
goto out1;
+ }
}
}
- if (kd_ctrl_page.kdebug_flags & KDBG_WRAPPED) {
- if (timestamp < kd_ctrl_page.oldest_time) {
- goto out1;
- }
+record_event:
+ if (timestamp < kd_ctrl_page.oldest_time) {
+ goto out1;
}
-record_event:
+#if CONFIG_EMBEDDED
+ /*
+ * When start_kern_tracing is called by the kernel to trace very
+ * early kernel events, it saves data to a secondary buffer until
+ * it is possible to initialize ktrace, and then dumps the events
+ * into the ktrace buffer using this method. In this case, iops will
+ * be NULL, and the coreid will be zero. It is not possible to have
+ * a valid IOP coreid of zero, so pass if both iops is NULL and coreid
+ * is zero.
+ */
+ assert(kdbg_iop_list_contains_cpu_id(kd_ctrl_page.kdebug_iops, coreid) || (kd_ctrl_page.kdebug_iops == NULL && coreid == 0));
+#endif
disable_preemption();
- if (kd_ctrl_page.enabled == 0)
+ if (kd_ctrl_page.enabled == 0) {
goto out;
+ }
kdbp = &kdbip[coreid];
timestamp &= KDBG_TIMESTAMP_MASK;
#if KDEBUG_MOJO_TRACE
- if (kdebug_enable & KDEBUG_ENABLE_SERIAL)
+ if (kdebug_enable & KDEBUG_ENABLE_SERIAL) {
kdebug_serial_print(coreid, debugid, timestamp,
- arg1, arg2, arg3, arg4, threadid);
+ arg1, arg2, arg3, arg4, threadid);
+ }
#endif
retry_q:
if (kds_raw.raw != KDS_PTR_NULL) {
kdsp_actual = POINTER_FROM_KDS_PTR(kds_raw);
bindx = kdsp_actual->kds_bufindx;
- } else
+ } else {
kdsp_actual = NULL;
-
+ bindx = EVENTS_PER_STORAGE_UNIT;
+ }
+
if (kdsp_actual == NULL || bindx >= EVENTS_PER_STORAGE_UNIT) {
- if (allocate_storage_unit(coreid) == FALSE) {
+ if (allocate_storage_unit(coreid) == false) {
/*
* this can only happen if wrapping
* has been disabled
}
goto retry_q;
}
- if ( !OSCompareAndSwap(bindx, bindx + 1, &kdsp_actual->kds_bufindx))
+ if (!OSCompareAndSwap(bindx, bindx + 1, &kdsp_actual->kds_bufindx)) {
goto retry_q;
+ }
// IOP entries can be allocated before xnu allocates and inits the buffer
- if (timestamp < kdsp_actual->kds_timestamp)
+ if (timestamp < kdsp_actual->kds_timestamp) {
kdsp_actual->kds_timestamp = timestamp;
+ }
kd = &kdsp_actual->kds_records[bindx];
kd->arg3 = arg3;
kd->arg4 = arg4;
kd->arg5 = threadid;
-
+
kdbg_set_timestamp_and_cpu(kd, timestamp, coreid);
OSAddAtomic(1, &kdsp_actual->kds_bufcnt);
}
}
+/*
+ * Check if the given debug ID is allowed to be traced on the current process.
+ *
+ * Returns true if allowed and false otherwise.
+ */
+static inline bool
+kdebug_debugid_procfilt_allowed(uint32_t debugid)
+{
+ uint32_t procfilt_flags = kd_ctrl_page.kdebug_flags &
+ (KDBG_PIDCHECK | KDBG_PIDEXCLUDE);
+
+ if (!procfilt_flags) {
+ return true;
+ }
+
+ /*
+ * DBG_TRACE and MACH_SCHED tracepoints ignore the process filter.
+ */
+ if ((debugid & 0xffff0000) == MACHDBG_CODE(DBG_MACH_SCHED, 0) ||
+ (debugid >> 24 == DBG_TRACE)) {
+ return true;
+ }
+
+ struct proc *curproc = current_proc();
+ /*
+ * If the process is missing (early in boot), allow it.
+ */
+ if (!curproc) {
+ return true;
+ }
+
+ if (procfilt_flags & KDBG_PIDCHECK) {
+ /*
+ * Allow only processes marked with the kdebug bit.
+ */
+ return curproc->p_kdebug;
+ } else if (procfilt_flags & KDBG_PIDEXCLUDE) {
+ /*
+ * Exclude any process marked with the kdebug bit.
+ */
+ return !curproc->p_kdebug;
+ } else {
+ panic("kdebug: invalid procfilt flags %x", kd_ctrl_page.kdebug_flags);
+ __builtin_unreachable();
+ }
+}
+
static void
kernel_debug_internal(
- boolean_t only_filter,
- uint32_t debugid,
+ uint32_t debugid,
uintptr_t arg1,
uintptr_t arg2,
uintptr_t arg3,
uintptr_t arg4,
- uintptr_t arg5)
+ uintptr_t arg5,
+ uint64_t flags)
{
- struct proc *curproc;
- uint64_t now;
- uint32_t bindx;
- kd_buf *kd;
- int cpu;
+ uint64_t now;
+ uint32_t bindx;
+ kd_buf *kd;
+ int cpu;
struct kd_bufinfo *kdbp;
struct kd_storage *kdsp_actual;
- union kds_ptr kds_raw;
+ union kds_ptr kds_raw;
+ bool only_filter = flags & KDBG_FLAG_FILTERED;
+ bool observe_procfilt = !(flags & KDBG_FLAG_NOPROCFILT);
if (kd_ctrl_page.kdebug_slowcheck) {
if ((kd_ctrl_page.kdebug_slowcheck & SLOW_NOLOG) ||
- !(kdebug_enable & (KDEBUG_ENABLE_TRACE | KDEBUG_ENABLE_PPT)))
- {
+ !(kdebug_enable & (KDEBUG_ENABLE_TRACE | KDEBUG_ENABLE_PPT))) {
goto out1;
}
- if ( !ml_at_interrupt_context()) {
- if (kd_ctrl_page.kdebug_flags & KDBG_PIDCHECK) {
- /*
- * If kdebug flag is not set for current proc, return
- */
- curproc = current_proc();
-
- if ((curproc && !(curproc->p_kdebug)) &&
- ((debugid & 0xffff0000) != (MACHDBG_CODE(DBG_MACH_SCHED, 0) | DBG_FUNC_NONE)) &&
- (debugid >> 24 != DBG_TRACE))
- goto out1;
- }
- else if (kd_ctrl_page.kdebug_flags & KDBG_PIDEXCLUDE) {
- /*
- * If kdebug flag is set for current proc, return
- */
- curproc = current_proc();
-
- if ((curproc && curproc->p_kdebug) &&
- ((debugid & 0xffff0000) != (MACHDBG_CODE(DBG_MACH_SCHED, 0) | DBG_FUNC_NONE)) &&
- (debugid >> 24 != DBG_TRACE))
- goto out1;
- }
+ if (!ml_at_interrupt_context() && observe_procfilt &&
+ !kdebug_debugid_procfilt_allowed(debugid)) {
+ goto out1;
}
if (kd_ctrl_page.kdebug_flags & KDBG_TYPEFILTER_CHECK) {
- if (typefilter_is_debugid_allowed(kdbg_typefilter, debugid))
+ if (typefilter_is_debugid_allowed(kdbg_typefilter, debugid)) {
goto record_event;
+ }
goto out1;
- } else if (only_filter == TRUE) {
+ } else if (only_filter) {
goto out1;
- }
- else if (kd_ctrl_page.kdebug_flags & KDBG_RANGECHECK) {
+ } else if (kd_ctrl_page.kdebug_flags & KDBG_RANGECHECK) {
/* Always record trace system info */
- if (KDBG_EXTRACT_CLASS(debugid) == DBG_TRACE)
+ if (KDBG_EXTRACT_CLASS(debugid) == DBG_TRACE) {
goto record_event;
-
- if (debugid < kdlog_beg || debugid > kdlog_end)
+ }
+
+ if (debugid < kdlog_beg || debugid > kdlog_end) {
goto out1;
- }
- else if (kd_ctrl_page.kdebug_flags & KDBG_VALCHECK) {
+ }
+ } else if (kd_ctrl_page.kdebug_flags & KDBG_VALCHECK) {
/* Always record trace system info */
- if (KDBG_EXTRACT_CLASS(debugid) == DBG_TRACE)
+ if (KDBG_EXTRACT_CLASS(debugid) == DBG_TRACE) {
goto record_event;
-
+ }
+
if ((debugid & KDBG_EVENTID_MASK) != kdlog_value1 &&
(debugid & KDBG_EVENTID_MASK) != kdlog_value2 &&
(debugid & KDBG_EVENTID_MASK) != kdlog_value3 &&
- (debugid & KDBG_EVENTID_MASK) != kdlog_value4)
+ (debugid & KDBG_EVENTID_MASK) != kdlog_value4) {
goto out1;
+ }
}
- } else if (only_filter == TRUE) {
+ } else if (only_filter) {
goto out1;
}
record_event:
disable_preemption();
- if (kd_ctrl_page.enabled == 0)
+ if (kd_ctrl_page.enabled == 0) {
goto out;
+ }
cpu = cpu_number();
kdbp = &kdbip[cpu];
#if KDEBUG_MOJO_TRACE
- if (kdebug_enable & KDEBUG_ENABLE_SERIAL)
+ if (kdebug_enable & KDEBUG_ENABLE_SERIAL) {
kdebug_serial_print(cpu, debugid,
- mach_absolute_time() & KDBG_TIMESTAMP_MASK,
- arg1, arg2, arg3, arg4, arg5);
+ kdbg_timestamp() & KDBG_TIMESTAMP_MASK,
+ arg1, arg2, arg3, arg4, arg5);
+ }
#endif
retry_q:
if (kds_raw.raw != KDS_PTR_NULL) {
kdsp_actual = POINTER_FROM_KDS_PTR(kds_raw);
bindx = kdsp_actual->kds_bufindx;
- } else
+ } else {
kdsp_actual = NULL;
-
+ bindx = EVENTS_PER_STORAGE_UNIT;
+ }
+
if (kdsp_actual == NULL || bindx >= EVENTS_PER_STORAGE_UNIT) {
- if (allocate_storage_unit(cpu) == FALSE) {
+ if (allocate_storage_unit(cpu) == false) {
/*
* this can only happen if wrapping
* has been disabled
}
goto retry_q;
}
- now = mach_absolute_time() & KDBG_TIMESTAMP_MASK;
- if ( !OSCompareAndSwap(bindx, bindx + 1, &kdsp_actual->kds_bufindx))
+ now = kdbg_timestamp() & KDBG_TIMESTAMP_MASK;
+
+ if (!OSCompareAndSwap(bindx, bindx + 1, &kdsp_actual->kds_bufindx)) {
goto retry_q;
+ }
kd = &kdsp_actual->kds_records[bindx];
enable_preemption();
out1:
if (kds_waiter && kd_ctrl_page.kds_inuse_count >= n_storage_threshold) {
- uint32_t etype;
- uint32_t stype;
+ uint32_t etype;
+ uint32_t stype;
etype = debugid & KDBG_EVENTID_MASK;
stype = debugid & KDBG_CSC_MASK;
}
}
+__attribute__((noinline))
void
kernel_debug(
- uint32_t debugid,
- uintptr_t arg1,
- uintptr_t arg2,
- uintptr_t arg3,
- uintptr_t arg4,
+ uint32_t debugid,
+ uintptr_t arg1,
+ uintptr_t arg2,
+ uintptr_t arg3,
+ uintptr_t arg4,
__unused uintptr_t arg5)
{
- kernel_debug_internal(FALSE, debugid, arg1, arg2, arg3, arg4,
- (uintptr_t)thread_tid(current_thread()));
+ kernel_debug_internal(debugid, arg1, arg2, arg3, arg4,
+ (uintptr_t)thread_tid(current_thread()), 0);
}
+__attribute__((noinline))
void
kernel_debug1(
- uint32_t debugid,
- uintptr_t arg1,
- uintptr_t arg2,
- uintptr_t arg3,
- uintptr_t arg4,
- uintptr_t arg5)
+ uint32_t debugid,
+ uintptr_t arg1,
+ uintptr_t arg2,
+ uintptr_t arg3,
+ uintptr_t arg4,
+ uintptr_t arg5)
+{
+ kernel_debug_internal(debugid, arg1, arg2, arg3, arg4, arg5, 0);
+}
+
+__attribute__((noinline))
+void
+kernel_debug_flags(
+ uint32_t debugid,
+ uintptr_t arg1,
+ uintptr_t arg2,
+ uintptr_t arg3,
+ uintptr_t arg4,
+ uint64_t flags)
{
- kernel_debug_internal(FALSE, debugid, arg1, arg2, arg3, arg4, arg5);
+ kernel_debug_internal(debugid, arg1, arg2, arg3, arg4,
+ (uintptr_t)thread_tid(current_thread()), flags);
}
+__attribute__((noinline))
void
kernel_debug_filtered(
- uint32_t debugid,
+ uint32_t debugid,
uintptr_t arg1,
uintptr_t arg2,
uintptr_t arg3,
uintptr_t arg4)
{
- kernel_debug_internal(TRUE, debugid, arg1, arg2, arg3, arg4,
- (uintptr_t)thread_tid(current_thread()));
+ kernel_debug_flags(debugid, arg1, arg2, arg3, arg4, KDBG_FLAG_FILTERED);
}
void
void
kernel_debug_string_simple(uint32_t eventid, const char *str)
{
+ if (!kdebug_enable) {
+ return;
+ }
+
/* array of uintptr_ts simplifies emitting the string as arguments */
uintptr_t str_buf[(SIMPLE_STR_LEN / sizeof(uintptr_t)) + 1] = { 0 };
size_t len = strlcpy((char *)str_buf, str, SIMPLE_STR_LEN + 1);
debugid |= DBG_FUNC_END;
}
- kernel_debug_internal(FALSE, debugid, str_buf[0],
- str_buf[1],
- str_buf[2],
- str_buf[3], thread_id);
+ kernel_debug_internal(debugid, str_buf[0],
+ str_buf[1],
+ str_buf[2],
+ str_buf[3], thread_id, 0);
debugid &= KDBG_EVENTID_MASK;
int i = 4;
if ((written + (4 * sizeof(uintptr_t))) >= len) {
debugid |= DBG_FUNC_END;
}
- kernel_debug_internal(FALSE, debugid, str_buf[i],
- str_buf[i + 1],
- str_buf[i + 2],
- str_buf[i + 3], thread_id);
+ kernel_debug_internal(debugid, str_buf[i],
+ str_buf[i + 1],
+ str_buf[i + 2],
+ str_buf[i + 3], thread_id, 0);
}
}
-extern int master_cpu; /* MACH_KERNEL_PRIVATE */
+extern int master_cpu; /* MACH_KERNEL_PRIVATE */
/*
* Used prior to start_kern_tracing() being called.
* Log temporarily into a static buffer.
*/
void
kernel_debug_early(
- uint32_t debugid,
- uintptr_t arg1,
- uintptr_t arg2,
- uintptr_t arg3,
- uintptr_t arg4)
+ uint32_t debugid,
+ uintptr_t arg1,
+ uintptr_t arg2,
+ uintptr_t arg3,
+ uintptr_t arg4)
{
- /* If tracing is already initialized, use it */
- if (nkdbufs) {
+#if defined(__x86_64__)
+ extern int early_boot;
+ /*
+ * Note that "early" isn't early enough in some cases where
+ * we're invoked before gsbase is set on x86, hence the
+ * check of "early_boot".
+ */
+ if (early_boot) {
+ return;
+ }
+#endif
+
+ /* If early tracing is over, use the normal path. */
+ if (kd_early_done) {
KERNEL_DEBUG_CONSTANT(debugid, arg1, arg2, arg3, arg4, 0);
return;
}
- /* Do nothing if the buffer is full or we're not on the boot cpu */
- kd_early_overflow = kd_early_index >= KD_EARLY_BUFFER_MAX;
- if (kd_early_overflow ||
- cpu_number() != master_cpu)
+ /* Do nothing if the buffer is full or we're not on the boot cpu. */
+ kd_early_overflow = kd_early_index >= KD_EARLY_BUFFER_NBUFS;
+ if (kd_early_overflow || cpu_number() != master_cpu) {
return;
+ }
kd_early_buffer[kd_early_index].debugid = debugid;
kd_early_buffer[kd_early_index].timestamp = mach_absolute_time();
}
/*
- * Transfen the contents of the temporary buffer into the trace buffers.
+ * Transfer the contents of the temporary buffer into the trace buffers.
* Precede that by logging the rebase time (offset) - the TSC-based time (in ns)
* when mach_absolute_time is set to 0.
*/
static void
kernel_debug_early_end(void)
{
- int i;
-
- if (cpu_number() != master_cpu)
+ if (cpu_number() != master_cpu) {
panic("kernel_debug_early_end() not call on boot processor");
+ }
+
+ /* reset the current oldest time to allow early events */
+ kd_ctrl_page.oldest_time = 0;
+#if !CONFIG_EMBEDDED
/* Fake sentinel marking the start of kernel time relative to TSC */
- kernel_debug_enter(
- 0,
- TRACE_TIMESTAMPS,
- 0,
- (uint32_t)(tsc_rebase_abs_time >> 32),
- (uint32_t)tsc_rebase_abs_time,
- 0,
- 0,
- 0);
- for (i = 0; i < kd_early_index; i++) {
- kernel_debug_enter(
- 0,
- kd_early_buffer[i].debugid,
- kd_early_buffer[i].timestamp,
- kd_early_buffer[i].arg1,
- kd_early_buffer[i].arg2,
- kd_early_buffer[i].arg3,
- kd_early_buffer[i].arg4,
- 0);
+ kernel_debug_enter(0,
+ TRACE_TIMESTAMPS,
+ 0,
+ (uint32_t)(tsc_rebase_abs_time >> 32),
+ (uint32_t)tsc_rebase_abs_time,
+ tsc_at_boot,
+ 0,
+ 0);
+#endif
+ for (unsigned int i = 0; i < kd_early_index; i++) {
+ kernel_debug_enter(0,
+ kd_early_buffer[i].debugid,
+ kd_early_buffer[i].timestamp,
+ kd_early_buffer[i].arg1,
+ kd_early_buffer[i].arg2,
+ kd_early_buffer[i].arg3,
+ kd_early_buffer[i].arg4,
+ 0);
}
/* Cut events-lost event on overflow */
- if (kd_early_overflow)
- KERNEL_DEBUG_CONSTANT(
- TRACE_LOST_EVENTS, 0, 0, 0, 0, 0);
+ if (kd_early_overflow) {
+ KDBG_RELEASE(TRACE_LOST_EVENTS, 1);
+ }
+
+ kd_early_done = true;
/* This trace marks the start of kernel tracing */
kernel_debug_string_early("early trace done");
kernel_debug_disable(void)
{
if (kdebug_enable) {
- kdbg_set_tracing_enabled(FALSE, 0);
+ kdbg_set_tracing_enabled(false, 0);
}
}
debugid_class = KDBG_EXTRACT_CLASS(debugid);
switch (debugid_class) {
- case DBG_TRACE:
- return EPERM;
+ case DBG_TRACE:
+ return EPERM;
}
return 0;
*/
int
kdebug_typefilter(__unused struct proc* p,
- struct kdebug_typefilter_args* uap,
- __unused int *retval)
+ struct kdebug_typefilter_args* uap,
+ __unused int *retval)
{
int ret = KERN_SUCCESS;
* the first atomic load test of Global Typefilter Ptr, this function
* can then safely use the remaining global state without atomic checks.
*/
- if (!__c11_atomic_load((_Atomic typefilter_t *)&kdbg_typefilter, memory_order_acquire)) {
+ if (!os_atomic_load(&kdbg_typefilter, acquire)) {
return EINVAL;
}
vm_map_t user_map = current_map();
ret = mach_to_bsd_errno(
- mach_vm_map(user_map, // target map
- &user_addr, // [in, out] target address
- TYPEFILTER_ALLOC_SIZE, // initial size
- 0, // mask (alignment?)
- VM_FLAGS_ANYWHERE, // flags
- kdbg_typefilter_memory_entry, // port (memory entry!)
- 0, // offset (in memory entry)
- FALSE, // should copy
- VM_PROT_READ, // cur_prot
- VM_PROT_READ, // max_prot
- VM_INHERIT_SHARE)); // inherit behavior on fork
+ mach_vm_map_kernel(user_map, // target map
+ &user_addr, // [in, out] target address
+ TYPEFILTER_ALLOC_SIZE, // initial size
+ 0, // mask (alignment?)
+ VM_FLAGS_ANYWHERE, // flags
+ VM_MAP_KERNEL_FLAGS_NONE,
+ VM_KERN_MEMORY_NONE,
+ kdbg_typefilter_memory_entry, // port (memory entry!)
+ 0, // offset (in memory entry)
+ false, // should copy
+ VM_PROT_READ, // cur_prot
+ VM_PROT_READ, // max_prot
+ VM_INHERIT_SHARE)); // inherit behavior on fork
if (ret == KERN_SUCCESS) {
vm_size_t user_ptr_size = vm_map_is_64bit(user_map) ? 8 : 4;
* enabled. This is to match the userspace wrapper behavior, which is optimizing
* for non-error case performance.
*/
-int kdebug_trace64(__unused struct proc *p, struct kdebug_trace64_args *uap, __unused int32_t *retval)
+int
+kdebug_trace64(__unused struct proc *p, struct kdebug_trace64_args *uap, __unused int32_t *retval)
{
int err;
- if ( __probable(kdebug_enable == 0) )
- return(0);
+ if (__probable(kdebug_enable == 0)) {
+ return 0;
+ }
if ((err = kdebug_validate_debugid(uap->code)) != 0) {
return err;
}
- kernel_debug_internal(FALSE, uap->code,
- (uintptr_t)uap->arg1,
- (uintptr_t)uap->arg2,
- (uintptr_t)uap->arg3,
- (uintptr_t)uap->arg4,
- (uintptr_t)thread_tid(current_thread()));
+ kernel_debug_internal(uap->code, (uintptr_t)uap->arg1,
+ (uintptr_t)uap->arg2, (uintptr_t)uap->arg3, (uintptr_t)uap->arg4,
+ (uintptr_t)thread_tid(current_thread()), 0);
- return(0);
+ return 0;
}
/*
*/
static uint64_t
kernel_debug_string_internal(uint32_t debugid, uint64_t str_id, void *vstr,
- size_t str_len)
+ size_t str_len)
{
/* str must be word-aligned */
uintptr_t *str = vstr;
uintptr_t thread_id;
int i;
uint32_t trace_debugid = TRACEDBG_CODE(DBG_TRACE_STRING,
- TRACE_STRING_GLOBAL);
+ TRACE_STRING_GLOBAL);
thread_id = (uintptr_t)thread_tid(current_thread());
/* if the ID is being invalidated, just emit that */
if (str_id != 0 && str_len == 0) {
- kernel_debug_internal(FALSE, trace_debugid | DBG_FUNC_START | DBG_FUNC_END,
- (uintptr_t)debugid, (uintptr_t)str_id, 0, 0,
- thread_id);
+ kernel_debug_internal(trace_debugid | DBG_FUNC_START | DBG_FUNC_END,
+ (uintptr_t)debugid, (uintptr_t)str_id, 0, 0, thread_id, 0);
return str_id;
}
trace_debugid |= DBG_FUNC_END;
}
- kernel_debug_internal(FALSE, trace_debugid, (uintptr_t)debugid,
- (uintptr_t)str_id, str[0],
- str[1], thread_id);
+ kernel_debug_internal(trace_debugid, (uintptr_t)debugid, (uintptr_t)str_id,
+ str[0], str[1], thread_id, 0);
trace_debugid &= KDBG_EVENTID_MASK;
i = 2;
if ((written + (4 * sizeof(uintptr_t))) >= str_len) {
trace_debugid |= DBG_FUNC_END;
}
- kernel_debug_internal(FALSE, trace_debugid, str[i],
- str[i + 1],
- str[i + 2],
- str[i + 3], thread_id);
+ kernel_debug_internal(trace_debugid, str[i],
+ str[i + 1],
+ str[i + 2],
+ str[i + 3], thread_id, 0);
}
return str_id;
* Trace system and scheduling events circumvent this check, as do events
* emitted in interrupt context.
*/
-static boolean_t
+static bool
kdebug_current_proc_enabled(uint32_t debugid)
{
/* can't determine current process in interrupt context */
if (ml_at_interrupt_context()) {
- return TRUE;
+ return true;
}
/* always emit trace system and scheduling events */
if ((KDBG_EXTRACT_CLASS(debugid) == DBG_TRACE ||
- (debugid & KDBG_CSC_MASK) == MACHDBG_CODE(DBG_MACH_SCHED, 0)))
- {
- return TRUE;
+ (debugid & KDBG_CSC_MASK) == MACHDBG_CODE(DBG_MACH_SCHED, 0))) {
+ return true;
}
if (kd_ctrl_page.kdebug_flags & KDBG_PIDCHECK) {
/* only the process with the kdebug bit set is allowed */
if (cur_proc && !(cur_proc->p_kdebug)) {
- return FALSE;
+ return false;
}
} else if (kd_ctrl_page.kdebug_flags & KDBG_PIDEXCLUDE) {
proc_t cur_proc = current_proc();
/* every process except the one with the kdebug bit set is allowed */
if (cur_proc && cur_proc->p_kdebug) {
- return FALSE;
+ return false;
}
}
- return TRUE;
+ return true;
}
-/*
- * Returns false if the debugid is disabled by filters, and true if the
- * debugid is allowed to be traced. A debugid may not be traced if the
- * typefilter disables its class and subclass, it's outside a range
- * check, or if it's not an allowed debugid in a value check. Trace
- * system events bypass this check.
- */
-boolean_t
+bool
kdebug_debugid_enabled(uint32_t debugid)
{
/* if no filtering is enabled */
if (!kd_ctrl_page.kdebug_slowcheck) {
- return TRUE;
+ return true;
}
+ return kdebug_debugid_explicitly_enabled(debugid);
+}
+
+bool
+kdebug_debugid_explicitly_enabled(uint32_t debugid)
+{
if (kd_ctrl_page.kdebug_flags & KDBG_TYPEFILTER_CHECK) {
return typefilter_is_debugid_allowed(kdbg_typefilter, debugid);
} else if (KDBG_EXTRACT_CLASS(debugid) == DBG_TRACE) {
- return TRUE;
- }
-
- if (kd_ctrl_page.kdebug_flags & KDBG_RANGECHECK) {
+ return true;
+ } else if (kd_ctrl_page.kdebug_flags & KDBG_RANGECHECK) {
if (debugid < kdlog_beg || debugid > kdlog_end) {
- return FALSE;
+ return false;
}
} else if (kd_ctrl_page.kdebug_flags & KDBG_VALCHECK) {
if ((debugid & KDBG_EVENTID_MASK) != kdlog_value1 &&
- (debugid & KDBG_EVENTID_MASK) != kdlog_value2 &&
- (debugid & KDBG_EVENTID_MASK) != kdlog_value3 &&
- (debugid & KDBG_EVENTID_MASK) != kdlog_value4)
- {
- return FALSE;
+ (debugid & KDBG_EVENTID_MASK) != kdlog_value2 &&
+ (debugid & KDBG_EVENTID_MASK) != kdlog_value3 &&
+ (debugid & KDBG_EVENTID_MASK) != kdlog_value4) {
+ return false;
}
}
- return TRUE;
+ return true;
+}
+
+bool
+kdebug_using_continuous_time(void)
+{
+ return kdebug_enable & KDEBUG_ENABLE_CONT_TIME;
}
/*
memset(str_buf, 0, sizeof(str_buf));
len_copied = strlcpy(str_buf, str, MAX_STR_LEN + 1);
*str_id = kernel_debug_string_internal(debugid, *str_id, str_buf,
- len_copied);
+ len_copied);
return 0;
}
*/
int
kdebug_trace_string(__unused struct proc *p,
- struct kdebug_trace_string_args *uap,
- uint64_t *retval)
+ struct kdebug_trace_string_args *uap,
+ uint64_t *retval)
{
__attribute__((aligned(sizeof(uintptr_t)))) char str_buf[STR_BUF_SIZE];
static_assert(sizeof(str_buf) > MAX_STR_LEN);
}
*retval = kernel_debug_string_internal(uap->debugid, uap->str_id,
- NULL, 0);
+ NULL, 0);
return 0;
}
len_copied--;
*retval = kernel_debug_string_internal(uap->debugid, uap->str_id, str_buf,
- len_copied);
+ len_copied);
return 0;
}
kdbg_lock_init(void)
{
static lck_grp_attr_t *kdebug_lck_grp_attr = NULL;
- static lck_grp_t *kdebug_lck_grp = NULL;
static lck_attr_t *kdebug_lck_attr = NULL;
if (kd_ctrl_page.kdebug_flags & KDBG_LOCKINIT) {
}
int
-kdbg_bootstrap(boolean_t early_trace)
+kdbg_bootstrap(bool early_trace)
{
kd_ctrl_page.kdebug_flags &= ~KDBG_WRAPPED;
- return (create_buffers(early_trace));
+ return create_buffers(early_trace);
}
int
-kdbg_reinit(boolean_t early_trace)
+kdbg_reinit(bool early_trace)
{
int ret = 0;
RAW_file_offset = 0;
RAW_file_written = 0;
- return(ret);
+ return ret;
}
void
-kdbg_trace_data(struct proc *proc, long *arg_pid)
+kdbg_trace_data(struct proc *proc, long *arg_pid, long *arg_uniqueid)
{
- if (!proc)
+ if (!proc) {
*arg_pid = 0;
- else
+ *arg_uniqueid = 0;
+ } else {
*arg_pid = proc->p_pid;
+ *arg_uniqueid = proc->p_uniqueid;
+ if ((uint64_t) *arg_uniqueid != proc->p_uniqueid) {
+ *arg_uniqueid = 0;
+ }
+ }
}
void
-kdbg_trace_string(struct proc *proc, long *arg1, long *arg2, long *arg3, long *arg4)
+kdbg_trace_string(struct proc *proc, long *arg1, long *arg2, long *arg3,
+ long *arg4)
{
- char *dbg_nameptr;
- int dbg_namelen;
- long dbg_parms[4];
-
if (!proc) {
*arg1 = 0;
*arg2 = 0;
*arg4 = 0;
return;
}
- /*
- * Collect the pathname for tracing
- */
- dbg_nameptr = proc->p_comm;
- dbg_namelen = (int)strlen(proc->p_comm);
- dbg_parms[0]=0L;
- dbg_parms[1]=0L;
- dbg_parms[2]=0L;
- dbg_parms[3]=0L;
-
- if(dbg_namelen > (int)sizeof(dbg_parms))
- dbg_namelen = (int)sizeof(dbg_parms);
-
- strncpy((char *)dbg_parms, dbg_nameptr, dbg_namelen);
-
- *arg1=dbg_parms[0];
- *arg2=dbg_parms[1];
- *arg3=dbg_parms[2];
- *arg4=dbg_parms[3];
+
+ const char *procname = proc_best_name(proc);
+ size_t namelen = strlen(procname);
+
+ long args[4] = { 0 };
+
+ if (namelen > sizeof(args)) {
+ namelen = sizeof(args);
+ }
+
+ strncpy((char *)args, procname, namelen);
+
+ *arg1 = args[0];
+ *arg2 = args[1];
+ *arg3 = args[2];
+ *arg4 = args[3];
}
static void
mapptr = &t->map[t->count];
mapptr->thread = (uintptr_t)thread_tid(th_act);
- (void) strlcpy (mapptr->command, t->atts->task_comm,
- sizeof(t->atts->task_comm));
+ (void) strlcpy(mapptr->command, t->atts->task_comm,
+ sizeof(t->atts->task_comm));
/*
* Some kernel threads have no associated pid.
* We still need to mark the entry as valid.
*/
- if (t->atts->pid)
+ if (t->atts->pid) {
mapptr->valid = t->atts->pid;
- else
+ } else {
mapptr->valid = 1;
+ }
t->count++;
}
uint32_t bytes_needed = sizeof(kd_cpumap_header) + cpu_count * sizeof(kd_cpumap);
uint32_t bytes_available = *cpumap_size;
*cpumap_size = bytes_needed;
-
+
if (*cpumap == NULL) {
if (kmem_alloc(kernel_map, (vm_offset_t*)cpumap, (vm_size_t)*cpumap_size, VM_KERN_MEMORY_DIAG) != KERN_SUCCESS) {
return ENOMEM;
cpus[index].cpu_id = iops->cpu_id;
cpus[index].flags = KDBG_CPUMAP_IS_IOP;
strlcpy(cpus[index].name, iops->callback.iop_name, sizeof(cpus->name));
-
+
iops = iops->next;
index--;
}
-
+
while (index >= 0) {
cpus[index].cpu_id = index;
cpus[index].flags = 0;
index--;
}
-
+
return KERN_SUCCESS;
}
void
kdbg_thrmap_init(void)
{
- lck_mtx_assert(ktrace_lock, LCK_MTX_ASSERT_OWNED);
+ ktrace_assert_lock_held();
if (kd_ctrl_page.kdebug_flags & KDBG_MAPINIT) {
return;
/*
* The proc count could change during buffer allocation,
* so introduce a small fudge factor to bump up the
- * buffer sizes. This gives new tasks some chance of
+ * buffer sizes. This gives new tasks some chance of
* making into the tables. Bump up by 25%.
*/
*mapcount += *mapcount / 4;
kd_ctrl_page.oldest_time = 0;
delete_buffers();
- nkdbufs = 0;
+ nkdbufs = 0;
/* Clean up the thread map buffer */
kdbg_clear_thread_map();
void
kdebug_reset(void)
{
- lck_mtx_assert(ktrace_lock, LCK_MTX_ASSERT_OWNED);
+ ktrace_assert_lock_held();
kdbg_lock_init();
}
}
+void
+kdebug_free_early_buf(void)
+{
+#if !CONFIG_EMBEDDED
+ /* Must be done with the buffer, so release it back to the VM.
+ * On embedded targets this buffer is freed when the BOOTDATA segment is freed. */
+ ml_static_mfree((vm_offset_t)&kd_early_buffer, sizeof(kd_early_buffer));
+#endif
+}
+
int
kdbg_setpid(kd_regtype *kdr)
{
pid_t pid;
- int flag, ret=0;
+ int flag, ret = 0;
struct proc *p;
pid = (pid_t)kdr->value1;
flag = (int)kdr->value2;
if (pid >= 0) {
- if ((p = proc_find(pid)) == NULL)
+ if ((p = proc_find(pid)) == NULL) {
ret = ESRCH;
- else {
+ } else {
if (flag == 1) {
/*
* turn on pid check for this and all pids
*/
kd_ctrl_page.kdebug_flags |= KDBG_PIDCHECK;
kd_ctrl_page.kdebug_flags &= ~KDBG_PIDEXCLUDE;
- kdbg_set_flags(SLOW_CHECKS, 0, TRUE);
+ kdbg_set_flags(SLOW_CHECKS, 0, true);
p->p_kdebug = 1;
} else {
* Don't turn off all pid checking though
*
* kd_ctrl_page.kdebug_flags &= ~KDBG_PIDCHECK;
- */
+ */
p->p_kdebug = 0;
}
proc_rele(p);
}
- }
- else
+ } else {
ret = EINVAL;
+ }
- return(ret);
+ return ret;
}
/* This is for pid exclusion in the trace buffer */
kdbg_setpidex(kd_regtype *kdr)
{
pid_t pid;
- int flag, ret=0;
+ int flag, ret = 0;
struct proc *p;
pid = (pid_t)kdr->value1;
flag = (int)kdr->value2;
if (pid >= 0) {
- if ((p = proc_find(pid)) == NULL)
+ if ((p = proc_find(pid)) == NULL) {
ret = ESRCH;
- else {
+ } else {
if (flag == 1) {
/*
* turn on pid exclusion
*/
kd_ctrl_page.kdebug_flags |= KDBG_PIDEXCLUDE;
kd_ctrl_page.kdebug_flags &= ~KDBG_PIDCHECK;
- kdbg_set_flags(SLOW_CHECKS, 0, TRUE);
+ kdbg_set_flags(SLOW_CHECKS, 0, true);
p->p_kdebug = 1;
- }
- else {
+ } else {
/*
* turn off pid exclusion for this pid value
* Don't turn off all pid exclusion though
*
* kd_ctrl_page.kdebug_flags &= ~KDBG_PIDEXCLUDE;
- */
+ */
p->p_kdebug = 0;
}
proc_rele(p);
}
- } else
+ } else {
ret = EINVAL;
+ }
- return(ret);
+ return ret;
}
/*
static int
kdbg_initialize_typefilter(typefilter_t tf)
{
- lck_mtx_assert(ktrace_lock, LCK_MTX_ASSERT_OWNED);
+ ktrace_assert_lock_held();
assert(!kdbg_typefilter);
assert(!kdbg_typefilter_memory_entry);
typefilter_t deallocate_tf = NULL;
* that any non-null kdbg_typefilter means a
* valid memory_entry is available.
*/
- __c11_atomic_store(((_Atomic typefilter_t*)&kdbg_typefilter), tf, memory_order_release);
+ os_atomic_store(&kdbg_typefilter, tf, release);
return KERN_SUCCESS;
}
int ret = ENOMEM;
typefilter_t tf;
- lck_mtx_assert(ktrace_lock, LCK_MTX_ASSERT_OWNED);
+ ktrace_assert_lock_held();
if (size != KDBG_TYPEFILTER_BITMAP_SIZE) {
return EINVAL;
*
* Allocating a typefilter for the copyin allows
* the kernel to hold the invariant that DBG_TRACE
- * must always be allowed.
+ * must always be allowed.
*/
if (!kdbg_typefilter) {
if ((ret = kdbg_initialize_typefilter(tf))) {
kdbg_iop_list_callback(kd_ctrl_page.kdebug_iops, KD_CALLBACK_TYPEFILTER_CHANGED, kdbg_typefilter);
}
- if (tf)
+ if (tf) {
typefilter_deallocate(tf);
+ }
}
return ret;
assert(kdbg_typefilter);
kd_ctrl_page.kdebug_flags &= ~(KDBG_RANGECHECK | KDBG_VALCHECK);
kd_ctrl_page.kdebug_flags |= KDBG_TYPEFILTER_CHECK;
- kdbg_set_flags(SLOW_CHECKS, 0, TRUE);
+ kdbg_set_flags(SLOW_CHECKS, 0, true);
commpage_update_kdebug_state();
}
static void
kdbg_disable_typefilter(void)
{
+ bool notify_iops = kd_ctrl_page.kdebug_flags & KDBG_TYPEFILTER_CHECK;
kd_ctrl_page.kdebug_flags &= ~KDBG_TYPEFILTER_CHECK;
if ((kd_ctrl_page.kdebug_flags & (KDBG_PIDCHECK | KDBG_PIDEXCLUDE))) {
- kdbg_set_flags(SLOW_CHECKS, 0, TRUE);
+ kdbg_set_flags(SLOW_CHECKS, 0, true);
} else {
- kdbg_set_flags(SLOW_CHECKS, 0, FALSE);
+ kdbg_set_flags(SLOW_CHECKS, 0, false);
}
commpage_update_kdebug_state();
+
+ if (notify_iops) {
+ /*
+ * Notify IOPs that the typefilter will now allow everything.
+ * Otherwise, they won't know a typefilter is no longer in
+ * effect.
+ */
+ typefilter_allow_all(kdbg_typefilter);
+ kdbg_iop_list_callback(kd_ctrl_page.kdebug_iops,
+ KD_CALLBACK_TYPEFILTER_CHANGED, kdbg_typefilter);
+ }
}
uint32_t
int
kdbg_setreg(kd_regtype * kdr)
{
- int ret=0;
+ int ret = 0;
unsigned int val_1, val_2, val;
switch (kdr->type) {
-
- case KDBG_CLASSTYPE :
+ case KDBG_CLASSTYPE:
val_1 = (kdr->value1 & 0xff);
val_2 = (kdr->value2 & 0xff);
- kdlog_beg = (val_1<<24);
- kdlog_end = (val_2<<24);
+ kdlog_beg = (val_1 << 24);
+ kdlog_end = (val_2 << 24);
kd_ctrl_page.kdebug_flags &= (unsigned int)~KDBG_CKTYPES;
kd_ctrl_page.kdebug_flags &= ~KDBG_VALCHECK; /* Turn off specific value check */
kd_ctrl_page.kdebug_flags |= (KDBG_RANGECHECK | KDBG_CLASSTYPE);
- kdbg_set_flags(SLOW_CHECKS, 0, TRUE);
+ kdbg_set_flags(SLOW_CHECKS, 0, true);
break;
- case KDBG_SUBCLSTYPE :
+ case KDBG_SUBCLSTYPE:
val_1 = (kdr->value1 & 0xff);
val_2 = (kdr->value2 & 0xff);
val = val_2 + 1;
- kdlog_beg = ((val_1<<24) | (val_2 << 16));
- kdlog_end = ((val_1<<24) | (val << 16));
+ kdlog_beg = ((val_1 << 24) | (val_2 << 16));
+ kdlog_end = ((val_1 << 24) | (val << 16));
kd_ctrl_page.kdebug_flags &= (unsigned int)~KDBG_CKTYPES;
kd_ctrl_page.kdebug_flags &= ~KDBG_VALCHECK; /* Turn off specific value check */
kd_ctrl_page.kdebug_flags |= (KDBG_RANGECHECK | KDBG_SUBCLSTYPE);
- kdbg_set_flags(SLOW_CHECKS, 0, TRUE);
+ kdbg_set_flags(SLOW_CHECKS, 0, true);
break;
- case KDBG_RANGETYPE :
+ case KDBG_RANGETYPE:
kdlog_beg = (kdr->value1);
kdlog_end = (kdr->value2);
kd_ctrl_page.kdebug_flags &= (unsigned int)~KDBG_CKTYPES;
kd_ctrl_page.kdebug_flags &= ~KDBG_VALCHECK; /* Turn off specific value check */
kd_ctrl_page.kdebug_flags |= (KDBG_RANGECHECK | KDBG_RANGETYPE);
- kdbg_set_flags(SLOW_CHECKS, 0, TRUE);
+ kdbg_set_flags(SLOW_CHECKS, 0, true);
break;
case KDBG_VALCHECK:
kdlog_value1 = (kdr->value1);
kd_ctrl_page.kdebug_flags &= (unsigned int)~KDBG_CKTYPES;
kd_ctrl_page.kdebug_flags &= ~KDBG_RANGECHECK; /* Turn off range check */
kd_ctrl_page.kdebug_flags |= KDBG_VALCHECK; /* Turn on specific value check */
- kdbg_set_flags(SLOW_CHECKS, 0, TRUE);
+ kdbg_set_flags(SLOW_CHECKS, 0, true);
break;
- case KDBG_TYPENONE :
+ case KDBG_TYPENONE:
kd_ctrl_page.kdebug_flags &= (unsigned int)~KDBG_CKTYPES;
- if ( (kd_ctrl_page.kdebug_flags & (KDBG_RANGECHECK | KDBG_VALCHECK |
- KDBG_PIDCHECK | KDBG_PIDEXCLUDE |
- KDBG_TYPEFILTER_CHECK)) )
- kdbg_set_flags(SLOW_CHECKS, 0, TRUE);
- else
- kdbg_set_flags(SLOW_CHECKS, 0, FALSE);
+ if ((kd_ctrl_page.kdebug_flags & (KDBG_RANGECHECK | KDBG_VALCHECK |
+ KDBG_PIDCHECK | KDBG_PIDEXCLUDE |
+ KDBG_TYPEFILTER_CHECK))) {
+ kdbg_set_flags(SLOW_CHECKS, 0, true);
+ } else {
+ kdbg_set_flags(SLOW_CHECKS, 0, false);
+ }
kdlog_beg = 0;
kdlog_end = 0;
break;
- default :
+ default:
ret = EINVAL;
break;
}
- return(ret);
+ return ret;
}
static int
kdbg_write_to_vnode(caddr_t buffer, size_t size, vnode_t vp, vfs_context_t ctx, off_t file_offset)
{
- return vn_rdwr(UIO_WRITE, vp, buffer, size, file_offset, UIO_SYSSPACE, IO_NODELOCKED|IO_UNIT,
- vfs_context_ucred(ctx), (int *) 0, vfs_context_proc(ctx));
+ return vn_rdwr(UIO_WRITE, vp, buffer, size, file_offset, UIO_SYSSPACE, IO_NODELOCKED | IO_UNIT,
+ vfs_context_ucred(ctx), (int *) 0, vfs_context_proc(ctx));
}
int
goto write_error;
}
RAW_file_offset += (sizeof(kd_chunk_header_v3));
- }
- else {
+ } else {
ret = copyout(&header, buffer, sizeof(kd_chunk_header_v3));
if (ret) {
goto write_error;
return ret;
}
-int
-kdbg_write_v3_chunk_header_to_buffer(void * buffer, uint32_t tag, uint32_t sub_tag, uint64_t length)
-{
- kd_chunk_header_v3 header = {
- .tag = tag,
- .sub_tag = sub_tag,
- .length = length,
- };
-
- if (!buffer) {
- return 0;
- }
-
- memcpy(buffer, &header, sizeof(kd_chunk_header_v3));
-
- return (sizeof(kd_chunk_header_v3));
-}
-
-int
+static int
kdbg_write_v3_chunk_to_fd(uint32_t tag, uint32_t sub_tag, uint64_t length, void *payload, uint64_t payload_size, int fd)
{
proc_t p;
p = current_proc();
proc_fdlock(p);
- if ( (fp_lookup(p, fd, &fp, 1)) ) {
+ if ((fp_lookup(p, fd, &fp, 1))) {
proc_fdunlock(p);
return EFAULT;
}
vp = (struct vnode *) fp->f_fglob->fg_data;
proc_fdunlock(p);
- if ( (vnode_getwithref(vp)) == 0 ) {
+ if ((vnode_getwithref(vp)) == 0) {
RAW_file_offset = fp->f_fglob->fg_offset;
kd_chunk_header_v3 chunk_header = {
user_addr_t
kdbg_write_v3_event_chunk_header(user_addr_t buffer, uint32_t tag, uint64_t length, vnode_t vp, vfs_context_t ctx)
{
- uint64_t future_chunk_timestamp = 0;
- length += sizeof(uint64_t);
-
- if (kdbg_write_v3_chunk_header(buffer, tag, V3_EVENT_DATA_VERSION, length, vp, ctx)) {
- return 0;
- }
- if (buffer) {
- buffer += sizeof(kd_chunk_header_v3);
- }
-
- // Check that only one of them is valid
- assert(!buffer ^ !vp);
- assert((vp == NULL) || (ctx != NULL));
-
- // Write the 8-byte future_chunk_timestamp field in the payload
- if (buffer || vp) {
- if (vp) {
- int ret = kdbg_write_to_vnode((caddr_t)&future_chunk_timestamp, sizeof(uint64_t), vp, ctx, RAW_file_offset);
- if (!ret) {
- RAW_file_offset += (sizeof(uint64_t));
- }
- }
- else {
- if (copyout(&future_chunk_timestamp, buffer, sizeof(uint64_t))) {
- return 0;
- }
- }
- }
-
- return (buffer + sizeof(uint64_t));
+ uint64_t future_chunk_timestamp = 0;
+ length += sizeof(uint64_t);
+
+ if (kdbg_write_v3_chunk_header(buffer, tag, V3_EVENT_DATA_VERSION, length, vp, ctx)) {
+ return 0;
+ }
+ if (buffer) {
+ buffer += sizeof(kd_chunk_header_v3);
+ }
+
+ // Check that only one of them is valid
+ assert(!buffer ^ !vp);
+ assert((vp == NULL) || (ctx != NULL));
+
+ // Write the 8-byte future_chunk_timestamp field in the payload
+ if (buffer || vp) {
+ if (vp) {
+ int ret = kdbg_write_to_vnode((caddr_t)&future_chunk_timestamp, sizeof(uint64_t), vp, ctx, RAW_file_offset);
+ if (!ret) {
+ RAW_file_offset += (sizeof(uint64_t));
+ }
+ } else {
+ if (copyout(&future_chunk_timestamp, buffer, sizeof(uint64_t))) {
+ return 0;
+ }
+ }
+ }
+
+ return buffer + sizeof(uint64_t);
}
int
kdbg_write_v3_header(user_addr_t user_header, size_t *user_header_size, int fd)
{
- int ret = KERN_SUCCESS;
-
- uint8_t* cpumap = 0;
- uint32_t cpumap_size = 0;
- uint32_t thrmap_size = 0;
-
- size_t bytes_needed = 0;
-
- // Check that only one of them is valid
- assert(!user_header ^ !fd);
- assert(user_header_size);
-
- if ( !(kd_ctrl_page.kdebug_flags & KDBG_BUFINIT) ) {
- ret = EINVAL;
- goto bail;
- }
-
- if ( !(user_header || fd) ) {
- ret = EINVAL;
- goto bail;
- }
-
- // Initialize the cpu map
- ret = kdbg_cpumap_init_internal(kd_ctrl_page.kdebug_iops, kd_ctrl_page.kdebug_cpus, &cpumap, &cpumap_size);
- if (ret != KERN_SUCCESS) {
- goto bail;
- }
-
- // Check if a thread map is initialized
- if ( !kd_mapptr ) {
- ret = EINVAL;
- goto bail;
- }
- thrmap_size = kd_mapcount * sizeof(kd_threadmap);
-
- mach_timebase_info_data_t timebase = {0, 0};
- clock_timebase_info(&timebase);
-
- // Setup the header.
- // See v3 header description in sys/kdebug.h for more inforamtion.
- kd_header_v3 header = {
- .tag = RAW_VERSION3,
- .sub_tag = V3_HEADER_VERSION,
- .length = (sizeof(kd_header_v3) + cpumap_size - sizeof(kd_cpumap_header)),
- .timebase_numer = timebase.numer,
- .timebase_denom = timebase.denom,
- .timestamp = 0, /* FIXME rdar://problem/22053009 */
- .walltime_secs = 0,
- .walltime_usecs = 0,
- .timezone_minuteswest = 0,
- .timezone_dst = 0,
+ int ret = KERN_SUCCESS;
+
+ uint8_t* cpumap = 0;
+ uint32_t cpumap_size = 0;
+ uint32_t thrmap_size = 0;
+
+ size_t bytes_needed = 0;
+
+ // Check that only one of them is valid
+ assert(!user_header ^ !fd);
+ assert(user_header_size);
+
+ if (!(kd_ctrl_page.kdebug_flags & KDBG_BUFINIT)) {
+ ret = EINVAL;
+ goto bail;
+ }
+
+ if (!(user_header || fd)) {
+ ret = EINVAL;
+ goto bail;
+ }
+
+ // Initialize the cpu map
+ ret = kdbg_cpumap_init_internal(kd_ctrl_page.kdebug_iops, kd_ctrl_page.kdebug_cpus, &cpumap, &cpumap_size);
+ if (ret != KERN_SUCCESS) {
+ goto bail;
+ }
+
+ // Check if a thread map is initialized
+ if (!kd_mapptr) {
+ ret = EINVAL;
+ goto bail;
+ }
+ thrmap_size = kd_mapcount * sizeof(kd_threadmap);
+
+ mach_timebase_info_data_t timebase = {0, 0};
+ clock_timebase_info(&timebase);
+
+ // Setup the header.
+ // See v3 header description in sys/kdebug.h for more inforamtion.
+ kd_header_v3 header = {
+ .tag = RAW_VERSION3,
+ .sub_tag = V3_HEADER_VERSION,
+ .length = (sizeof(kd_header_v3) + cpumap_size - sizeof(kd_cpumap_header)),
+ .timebase_numer = timebase.numer,
+ .timebase_denom = timebase.denom,
+ .timestamp = 0, /* FIXME rdar://problem/22053009 */
+ .walltime_secs = 0,
+ .walltime_usecs = 0,
+ .timezone_minuteswest = 0,
+ .timezone_dst = 0,
#if defined(__LP64__)
- .flags = 1,
+ .flags = 1,
#else
- .flags = 0,
+ .flags = 0,
#endif
- };
-
- // If its a buffer, check if we have enough space to copy the header and the maps.
- if (user_header) {
- bytes_needed = header.length + thrmap_size + (2 * sizeof(kd_chunk_header_v3));
- if (*user_header_size < bytes_needed) {
- ret = EINVAL;
- goto bail;
- }
- }
-
- // Start writing the header
- if (fd) {
- void *hdr_ptr = (void *)(((uintptr_t) &header) + sizeof(kd_chunk_header_v3));
- size_t payload_size = (sizeof(kd_header_v3) - sizeof(kd_chunk_header_v3));
-
- ret = kdbg_write_v3_chunk_to_fd(RAW_VERSION3, V3_HEADER_VERSION, header.length, hdr_ptr, payload_size, fd);
- if (ret) {
- goto bail;
- }
- }
- else {
- if (copyout(&header, user_header, sizeof(kd_header_v3))) {
- ret = EFAULT;
- goto bail;
- }
- // Update the user pointer
- user_header += sizeof(kd_header_v3);
- }
-
- // Write a cpu map. This is a sub chunk of the header
- cpumap = (uint8_t*)((uintptr_t) cpumap + sizeof(kd_cpumap_header));
- size_t payload_size = (size_t)(cpumap_size - sizeof(kd_cpumap_header));
- if (fd) {
- ret = kdbg_write_v3_chunk_to_fd(V3_CPU_MAP, V3_CPUMAP_VERSION, payload_size, (void *)cpumap, payload_size, fd);
- if (ret) {
- goto bail;
- }
- }
- else {
- ret = kdbg_write_v3_chunk_header(user_header, V3_CPU_MAP, V3_CPUMAP_VERSION, payload_size, NULL, NULL);
- if (ret) {
- goto bail;
- }
- user_header += sizeof(kd_chunk_header_v3);
- if (copyout(cpumap, user_header, payload_size)) {
- ret = EFAULT;
- goto bail;
- }
- // Update the user pointer
- user_header += payload_size;
- }
-
- // Write a thread map
- if (fd) {
- ret = kdbg_write_v3_chunk_to_fd(V3_THREAD_MAP, V3_THRMAP_VERSION, thrmap_size, (void *)kd_mapptr, thrmap_size, fd);
- if (ret) {
- goto bail;
- }
- }
- else {
- ret = kdbg_write_v3_chunk_header(user_header, V3_THREAD_MAP, V3_THRMAP_VERSION, thrmap_size, NULL, NULL);
- if (ret) {
- goto bail;
- }
- user_header += sizeof(kd_chunk_header_v3);
- if (copyout(kd_mapptr, user_header, thrmap_size)) {
- ret = EFAULT;
- goto bail;
- }
- user_header += thrmap_size;
- }
-
- if (fd) {
- RAW_file_written += bytes_needed;
- }
-
- *user_header_size = bytes_needed;
+ };
+
+ // If its a buffer, check if we have enough space to copy the header and the maps.
+ if (user_header) {
+ bytes_needed = header.length + thrmap_size + (2 * sizeof(kd_chunk_header_v3));
+ if (*user_header_size < bytes_needed) {
+ ret = EINVAL;
+ goto bail;
+ }
+ }
+
+ // Start writing the header
+ if (fd) {
+ void *hdr_ptr = (void *)(((uintptr_t) &header) + sizeof(kd_chunk_header_v3));
+ size_t payload_size = (sizeof(kd_header_v3) - sizeof(kd_chunk_header_v3));
+
+ ret = kdbg_write_v3_chunk_to_fd(RAW_VERSION3, V3_HEADER_VERSION, header.length, hdr_ptr, payload_size, fd);
+ if (ret) {
+ goto bail;
+ }
+ } else {
+ if (copyout(&header, user_header, sizeof(kd_header_v3))) {
+ ret = EFAULT;
+ goto bail;
+ }
+ // Update the user pointer
+ user_header += sizeof(kd_header_v3);
+ }
+
+ // Write a cpu map. This is a sub chunk of the header
+ cpumap = (uint8_t*)((uintptr_t) cpumap + sizeof(kd_cpumap_header));
+ size_t payload_size = (size_t)(cpumap_size - sizeof(kd_cpumap_header));
+ if (fd) {
+ ret = kdbg_write_v3_chunk_to_fd(V3_CPU_MAP, V3_CPUMAP_VERSION, payload_size, (void *)cpumap, payload_size, fd);
+ if (ret) {
+ goto bail;
+ }
+ } else {
+ ret = kdbg_write_v3_chunk_header(user_header, V3_CPU_MAP, V3_CPUMAP_VERSION, payload_size, NULL, NULL);
+ if (ret) {
+ goto bail;
+ }
+ user_header += sizeof(kd_chunk_header_v3);
+ if (copyout(cpumap, user_header, payload_size)) {
+ ret = EFAULT;
+ goto bail;
+ }
+ // Update the user pointer
+ user_header += payload_size;
+ }
+
+ // Write a thread map
+ if (fd) {
+ ret = kdbg_write_v3_chunk_to_fd(V3_THREAD_MAP, V3_THRMAP_VERSION, thrmap_size, (void *)kd_mapptr, thrmap_size, fd);
+ if (ret) {
+ goto bail;
+ }
+ } else {
+ ret = kdbg_write_v3_chunk_header(user_header, V3_THREAD_MAP, V3_THRMAP_VERSION, thrmap_size, NULL, NULL);
+ if (ret) {
+ goto bail;
+ }
+ user_header += sizeof(kd_chunk_header_v3);
+ if (copyout(kd_mapptr, user_header, thrmap_size)) {
+ ret = EFAULT;
+ goto bail;
+ }
+ user_header += thrmap_size;
+ }
+
+ if (fd) {
+ RAW_file_written += bytes_needed;
+ }
+
+ *user_header_size = bytes_needed;
bail:
- if (cpumap) {
- kmem_free(kernel_map, (vm_offset_t)cpumap, cpumap_size);
- }
- return (ret);
+ if (cpumap) {
+ kmem_free(kernel_map, (vm_offset_t)cpumap, cpumap_size);
+ }
+ return ret;
}
int
}
*user_cpumap_size = cpumap_size;
kmem_free(kernel_map, (vm_offset_t)cpumap, cpumap_size);
- } else
+ } else {
ret = EINVAL;
- } else
+ }
+ } else {
ret = EINVAL;
+ }
- return (ret);
+ return ret;
}
int
unsigned int count = 0;
int ret = 0;
- count = *bufsize/sizeof(kd_threadmap);
+ count = *bufsize / sizeof(kd_threadmap);
*bufsize = 0;
- if ( (mapptr = kdbg_thrmap_init_internal(count, &mapsize, &mapcount)) ) {
- if (copyout(mapptr, buffer, mapcount * sizeof(kd_threadmap)))
+ if ((mapptr = kdbg_thrmap_init_internal(count, &mapsize, &mapcount))) {
+ if (copyout(mapptr, buffer, mapcount * sizeof(kd_threadmap))) {
ret = EFAULT;
- else
+ } else {
*bufsize = (mapcount * sizeof(kd_threadmap));
+ }
kmem_free(kernel_map, (vm_offset_t)mapptr, mapsize);
- } else
+ } else {
ret = EINVAL;
+ }
- return (ret);
+ return ret;
}
static int
-kdbg_write_v1_header(boolean_t write_thread_map, vnode_t vp, vfs_context_t ctx)
+kdbg_write_v1_header(bool write_thread_map, vnode_t vp, vfs_context_t ctx)
{
int ret = 0;
RAW_header header;
* the cpumap is embedded in the last 4K page before when the event data is expected.
* This way the tools can read the data starting the next page boundary on both
* 4K and 16K systems preserving compatibility with older versions of the tools
- */
+ */
if (pad_size > PAGE_4KB) {
pad_size -= PAGE_4KB;
extra_thread_count = (pad_size / sizeof(kd_threadmap)) + 1;
header.TOD_usecs = usecs;
ret = vn_rdwr(UIO_WRITE, vp, (caddr_t)&header, sizeof(RAW_header), RAW_file_offset,
- UIO_SYSSPACE, IO_NODELOCKED|IO_UNIT, vfs_context_ucred(ctx), (int *) 0, vfs_context_proc(ctx));
+ UIO_SYSSPACE, IO_NODELOCKED | IO_UNIT, vfs_context_ucred(ctx), (int *) 0, vfs_context_proc(ctx));
if (ret) {
goto write_error;
}
if (write_thread_map) {
ret = vn_rdwr(UIO_WRITE, vp, (caddr_t)kd_mapptr, map_size, RAW_file_offset,
- UIO_SYSSPACE, IO_NODELOCKED|IO_UNIT, vfs_context_ucred(ctx), (int *) 0, vfs_context_proc(ctx));
+ UIO_SYSSPACE, IO_NODELOCKED | IO_UNIT, vfs_context_ucred(ctx), (int *) 0, vfs_context_proc(ctx));
if (ret) {
goto write_error;
}
memset(pad_buf, 0, pad_size);
ret = vn_rdwr(UIO_WRITE, vp, (caddr_t)pad_buf, pad_size, RAW_file_offset,
- UIO_SYSSPACE, IO_NODELOCKED|IO_UNIT, vfs_context_ucred(ctx), (int *) 0, vfs_context_proc(ctx));
+ UIO_SYSSPACE, IO_NODELOCKED | IO_UNIT, vfs_context_ucred(ctx), (int *) 0, vfs_context_proc(ctx));
kfree(pad_buf, pad_size);
if (ret) {
goto write_error;
}
ret = vn_rdwr(UIO_WRITE, vp, (caddr_t)pad_buf, pad_size, RAW_file_offset,
- UIO_SYSSPACE, IO_NODELOCKED|IO_UNIT, vfs_context_ucred(ctx), (int *) 0, vfs_context_proc(ctx));
+ UIO_SYSSPACE, IO_NODELOCKED | IO_UNIT, vfs_context_ucred(ctx), (int *) 0, vfs_context_proc(ctx));
kfree(pad_buf, pad_size);
if (ret) {
goto write_error;
static void
kdbg_clear_thread_map(void)
{
- lck_mtx_assert(ktrace_lock, LCK_MTX_ASSERT_OWNED);
+ ktrace_assert_lock_held();
if (kd_ctrl_page.kdebug_flags & KDBG_MAPINIT) {
assert(kd_mapptr != NULL);
kdbg_write_thread_map(vnode_t vp, vfs_context_t ctx)
{
int ret = 0;
- boolean_t map_initialized;
+ bool map_initialized;
- lck_mtx_assert(ktrace_lock, LCK_MTX_ASSERT_OWNED);
+ ktrace_assert_lock_held();
assert(ctx != NULL);
map_initialized = (kd_ctrl_page.kdebug_flags & KDBG_MAPINIT);
static int
kdbg_copyout_thread_map(user_addr_t buffer, size_t *buffer_size)
{
- boolean_t map_initialized;
+ bool map_initialized;
size_t map_size;
int ret = 0;
- lck_mtx_assert(ktrace_lock, LCK_MTX_ASSERT_OWNED);
+ ktrace_assert_lock_held();
assert(buffer_size != NULL);
map_initialized = (kd_ctrl_page.kdebug_flags & KDBG_MAPINIT);
kdbg_readthrmap_v3(user_addr_t buffer, size_t buffer_size, int fd)
{
int ret = 0;
- boolean_t map_initialized;
+ bool map_initialized;
size_t map_size;
- lck_mtx_assert(ktrace_lock, LCK_MTX_ASSERT_OWNED);
+ ktrace_assert_lock_held();
if ((!fd && !buffer) || (fd && buffer)) {
return EINVAL;
map_initialized = (kd_ctrl_page.kdebug_flags & KDBG_MAPINIT);
map_size = kd_mapcount * sizeof(kd_threadmap);
- if (map_initialized && (buffer_size >= map_size))
- {
+ if (map_initialized && (buffer_size >= map_size)) {
ret = kdbg_write_v3_header(buffer, &buffer_size, fd);
if (ret == 0) {
ret = EINVAL;
}
- return ret;
+ return ret;
}
static void
-kdbg_set_nkdbufs(unsigned int value)
+kdbg_set_nkdbufs(unsigned int req_nkdbufs)
{
/*
- * We allow a maximum buffer size of 50% of either ram or max mapped
- * address, whichever is smaller 'value' is the desired number of trace
- * entries
+ * Only allow allocation up to half the available memory (sane_size).
*/
- unsigned int max_entries = (sane_size / 2) / sizeof(kd_buf);
-
- if (value <= max_entries) {
- nkdbufs = value;
- } else {
- nkdbufs = max_entries;
- }
+ uint64_t max_nkdbufs = (sane_size / 2) / sizeof(kd_buf);
+ nkdbufs = (req_nkdbufs > max_nkdbufs) ? max_nkdbufs : req_nkdbufs;
}
/*
*
* Called with `ktrace_lock` locked and interrupts enabled.
*/
-static boolean_t
-kdbg_wait(uint64_t timeout_ms, boolean_t locked_wait)
+static bool
+kdbg_wait(uint64_t timeout_ms, bool locked_wait)
{
int wait_result = THREAD_AWAKENED;
uint64_t abstime = 0;
+ ktrace_assert_lock_held();
+
if (timeout_ms != 0) {
uint64_t ns = timeout_ms * NSEC_PER_MSEC;
- nanoseconds_to_absolutetime(ns, &abstime);
+ nanoseconds_to_absolutetime(ns, &abstime);
clock_absolutetime_interval_to_deadline(abstime, &abstime);
}
- boolean_t s = ml_set_interrupts_enabled(FALSE);
+ bool s = ml_set_interrupts_enabled(false);
if (!s) {
panic("kdbg_wait() called with interrupts disabled");
}
- lck_spin_lock(kdw_spin_lock);
+ lck_spin_lock_grp(kdw_spin_lock, kdebug_lck_grp);
if (!locked_wait) {
/* drop the mutex to allow others to access trace */
- lck_mtx_unlock(ktrace_lock);
+ ktrace_unlock();
}
while (wait_result == THREAD_AWAKENED &&
- kd_ctrl_page.kds_inuse_count < n_storage_threshold)
- {
+ kd_ctrl_page.kds_inuse_count < n_storage_threshold) {
kds_waiter = 1;
if (abstime) {
}
/* check the count under the spinlock */
- boolean_t threshold_exceeded = (kd_ctrl_page.kds_inuse_count >= n_storage_threshold);
+ bool threshold_exceeded = (kd_ctrl_page.kds_inuse_count >= n_storage_threshold);
lck_spin_unlock(kdw_spin_lock);
ml_set_interrupts_enabled(s);
if (!locked_wait) {
/* pick the mutex back up again */
- lck_mtx_lock(ktrace_lock);
+ ktrace_lock();
}
/* write out whether we've exceeded the threshold */
static void
kdbg_wakeup(void)
{
- boolean_t need_kds_wakeup = FALSE;
+ bool need_kds_wakeup = false;
/*
* Try to take the lock here to synchronize with the waiter entering
* conditions. No problem if we fail, there will be lots of additional
* events coming in that will eventually succeed in grabbing this lock.
*/
- boolean_t s = ml_set_interrupts_enabled(FALSE);
+ bool s = ml_set_interrupts_enabled(false);
if (lck_spin_try_lock(kdw_spin_lock)) {
if (kds_waiter &&
- (kd_ctrl_page.kds_inuse_count >= n_storage_threshold))
- {
+ (kd_ctrl_page.kds_inuse_count >= n_storage_threshold)) {
kds_waiter = 0;
- need_kds_wakeup = TRUE;
+ need_kds_wakeup = true;
}
lck_spin_unlock(kdw_spin_lock);
}
ml_set_interrupts_enabled(s);
- if (need_kds_wakeup == TRUE) {
+ if (need_kds_wakeup == true) {
wakeup(&kds_waiter);
}
}
kbufinfo_t kd_bufinfo;
proc_t p;
- if (name[0] == KERN_KDGETENTROPY ||
- name[0] == KERN_KDWRITETR ||
- name[0] == KERN_KDWRITETR_V3 ||
- name[0] == KERN_KDWRITEMAP ||
- name[0] == KERN_KDWRITEMAP_V3 ||
- name[0] == KERN_KDEFLAGS ||
- name[0] == KERN_KDDFLAGS ||
- name[0] == KERN_KDENABLE ||
- name[0] == KERN_KDSETBUF)
- {
+ if (name[0] == KERN_KDWRITETR ||
+ name[0] == KERN_KDWRITETR_V3 ||
+ name[0] == KERN_KDWRITEMAP ||
+ name[0] == KERN_KDWRITEMAP_V3 ||
+ name[0] == KERN_KDEFLAGS ||
+ name[0] == KERN_KDDFLAGS ||
+ name[0] == KERN_KDENABLE ||
+ name[0] == KERN_KDSETBUF) {
if (namelen < 2) {
return EINVAL;
}
kdbg_lock_init();
assert(kd_ctrl_page.kdebug_flags & KDBG_LOCKINIT);
- lck_mtx_lock(ktrace_lock);
+ ktrace_lock();
/*
* Some requests only require "read" access to kdebug trace. Regardless,
*/
if (name[0] != KERN_KDGETBUF &&
name[0] != KERN_KDGETREG &&
- name[0] != KERN_KDREADCURTHRMAP &&
- name[0] != KERN_KDGETENTROPY)
- {
+ name[0] != KERN_KDREADCURTHRMAP) {
if ((ret = ktrace_configure(KTRACE_KDEBUG))) {
goto out;
}
}
}
- switch(name[0]) {
- case KERN_KDGETBUF:
- if (size < sizeof(kd_bufinfo.nkdbufs)) {
- /*
- * There is not enough room to return even
- * the first element of the info structure.
- */
- ret = EINVAL;
- break;
- }
+ switch (name[0]) {
+ case KERN_KDGETBUF:
+ if (size < sizeof(kd_bufinfo.nkdbufs)) {
+ /*
+ * There is not enough room to return even
+ * the first element of the info structure.
+ */
+ ret = EINVAL;
+ break;
+ }
- memset(&kd_bufinfo, 0, sizeof(kd_bufinfo));
+ memset(&kd_bufinfo, 0, sizeof(kd_bufinfo));
- kd_bufinfo.nkdbufs = nkdbufs;
- kd_bufinfo.nkdthreads = kd_mapcount;
+ kd_bufinfo.nkdbufs = nkdbufs;
+ kd_bufinfo.nkdthreads = kd_mapcount;
- if ( (kd_ctrl_page.kdebug_slowcheck & SLOW_NOLOG) )
- kd_bufinfo.nolog = 1;
- else
- kd_bufinfo.nolog = 0;
+ if ((kd_ctrl_page.kdebug_slowcheck & SLOW_NOLOG)) {
+ kd_bufinfo.nolog = 1;
+ } else {
+ kd_bufinfo.nolog = 0;
+ }
- kd_bufinfo.flags = kd_ctrl_page.kdebug_flags;
+ kd_bufinfo.flags = kd_ctrl_page.kdebug_flags;
#if defined(__LP64__)
- kd_bufinfo.flags |= KDBG_LP64;
+ kd_bufinfo.flags |= KDBG_LP64;
#endif
- {
- int pid = ktrace_get_owning_pid();
- kd_bufinfo.bufid = (pid == 0 ? -1 : pid);
- }
+ {
+ int pid = ktrace_get_owning_pid();
+ kd_bufinfo.bufid = (pid == 0 ? -1 : pid);
+ }
- if (size >= sizeof(kd_bufinfo)) {
- /*
- * Provide all the info we have
- */
- if (copyout(&kd_bufinfo, where, sizeof(kd_bufinfo)))
- ret = EINVAL;
- } else {
- /*
- * For backwards compatibility, only provide
- * as much info as there is room for.
- */
- if (copyout(&kd_bufinfo, where, size))
- ret = EINVAL;
+ if (size >= sizeof(kd_bufinfo)) {
+ /*
+ * Provide all the info we have
+ */
+ if (copyout(&kd_bufinfo, where, sizeof(kd_bufinfo))) {
+ ret = EINVAL;
+ }
+ } else {
+ /*
+ * For backwards compatibility, only provide
+ * as much info as there is room for.
+ */
+ if (copyout(&kd_bufinfo, where, size)) {
+ ret = EINVAL;
}
- break;
-
- case KERN_KDGETENTROPY: {
- /* Obsolescent - just fake with a random buffer */
- char *buffer = (char *) kalloc(size);
- read_frandom((void *) buffer, size);
- ret = copyout(buffer, where, size);
- kfree(buffer, size);
- break;
}
+ break;
- case KERN_KDREADCURTHRMAP:
- ret = kdbg_readcurthrmap(where, sizep);
- break;
+ case KERN_KDREADCURTHRMAP:
+ ret = kdbg_readcurthrmap(where, sizep);
+ break;
- case KERN_KDEFLAGS:
- value &= KDBG_USERFLAGS;
- kd_ctrl_page.kdebug_flags |= value;
- break;
+ case KERN_KDEFLAGS:
+ value &= KDBG_USERFLAGS;
+ kd_ctrl_page.kdebug_flags |= value;
+ break;
- case KERN_KDDFLAGS:
- value &= KDBG_USERFLAGS;
- kd_ctrl_page.kdebug_flags &= ~value;
- break;
+ case KERN_KDDFLAGS:
+ value &= KDBG_USERFLAGS;
+ kd_ctrl_page.kdebug_flags &= ~value;
+ break;
- case KERN_KDENABLE:
+ case KERN_KDENABLE:
+ /*
+ * Enable tracing mechanism. Two types:
+ * KDEBUG_TRACE is the standard one,
+ * and KDEBUG_PPT which is a carefully
+ * chosen subset to avoid performance impact.
+ */
+ if (value) {
/*
- * Enable tracing mechanism. Two types:
- * KDEBUG_TRACE is the standard one,
- * and KDEBUG_PPT which is a carefully
- * chosen subset to avoid performance impact.
+ * enable only if buffer is initialized
*/
- if (value) {
- /*
- * enable only if buffer is initialized
- */
- if (!(kd_ctrl_page.kdebug_flags & KDBG_BUFINIT) ||
- !(value == KDEBUG_ENABLE_TRACE || value == KDEBUG_ENABLE_PPT)) {
- ret = EINVAL;
- break;
- }
- kdbg_thrmap_init();
-
- kdbg_set_tracing_enabled(TRUE, value);
+ if (!(kd_ctrl_page.kdebug_flags & KDBG_BUFINIT) ||
+ !(value == KDEBUG_ENABLE_TRACE || value == KDEBUG_ENABLE_PPT)) {
+ ret = EINVAL;
+ break;
}
- else
- {
- if (!kdebug_enable) {
- break;
- }
+ kdbg_thrmap_init();
- kernel_debug_disable();
+ kdbg_set_tracing_enabled(true, value);
+ } else {
+ if (!kdebug_enable) {
+ break;
}
- break;
- case KERN_KDSETBUF:
- kdbg_set_nkdbufs(value);
- break;
+ kernel_debug_disable();
+ }
+ break;
- case KERN_KDSETUP:
- ret = kdbg_reinit(FALSE);
- break;
+ case KERN_KDSETBUF:
+ kdbg_set_nkdbufs(value);
+ break;
- case KERN_KDREMOVE:
- ktrace_reset(KTRACE_KDEBUG);
- break;
+ case KERN_KDSETUP:
+ ret = kdbg_reinit(false);
+ break;
- case KERN_KDSETREG:
- if(size < sizeof(kd_regtype)) {
- ret = EINVAL;
- break;
- }
- if (copyin(where, &kd_Reg, sizeof(kd_regtype))) {
- ret = EINVAL;
- break;
- }
+ case KERN_KDREMOVE:
+ ktrace_reset(KTRACE_KDEBUG);
+ break;
- ret = kdbg_setreg(&kd_Reg);
+ case KERN_KDSETREG:
+ if (size < sizeof(kd_regtype)) {
+ ret = EINVAL;
break;
-
- case KERN_KDGETREG:
+ }
+ if (copyin(where, &kd_Reg, sizeof(kd_regtype))) {
ret = EINVAL;
break;
+ }
- case KERN_KDREADTR:
- ret = kdbg_read(where, sizep, NULL, NULL, RAW_VERSION1);
- break;
+ ret = kdbg_setreg(&kd_Reg);
+ break;
- case KERN_KDWRITETR:
- case KERN_KDWRITETR_V3:
- case KERN_KDWRITEMAP:
- case KERN_KDWRITEMAP_V3:
- {
- struct vfs_context context;
- struct fileproc *fp;
- size_t number;
- vnode_t vp;
- int fd;
+ case KERN_KDGETREG:
+ ret = EINVAL;
+ break;
- if (name[0] == KERN_KDWRITETR || name[0] == KERN_KDWRITETR_V3) {
- (void)kdbg_wait(size, TRUE);
- }
- p = current_proc();
- fd = value;
+ case KERN_KDREADTR:
+ ret = kdbg_read(where, sizep, NULL, NULL, RAW_VERSION1);
+ break;
- proc_fdlock(p);
- if ( (ret = fp_lookup(p, fd, &fp, 1)) ) {
- proc_fdunlock(p);
- break;
- }
- context.vc_thread = current_thread();
- context.vc_ucred = fp->f_fglob->fg_cred;
+ case KERN_KDWRITETR:
+ case KERN_KDWRITETR_V3:
+ case KERN_KDWRITEMAP:
+ case KERN_KDWRITEMAP_V3:
+ {
+ struct vfs_context context;
+ struct fileproc *fp;
+ size_t number;
+ vnode_t vp;
+ int fd;
+
+ if (name[0] == KERN_KDWRITETR || name[0] == KERN_KDWRITETR_V3) {
+ (void)kdbg_wait(size, true);
+ }
+ p = current_proc();
+ fd = value;
- if (FILEGLOB_DTYPE(fp->f_fglob) != DTYPE_VNODE) {
- fp_drop(p, fd, fp, 1);
- proc_fdunlock(p);
+ proc_fdlock(p);
+ if ((ret = fp_lookup(p, fd, &fp, 1))) {
+ proc_fdunlock(p);
+ break;
+ }
+ context.vc_thread = current_thread();
+ context.vc_ucred = fp->f_fglob->fg_cred;
- ret = EBADF;
- break;
- }
- vp = (struct vnode *)fp->f_fglob->fg_data;
+ if (FILEGLOB_DTYPE(fp->f_fglob) != DTYPE_VNODE) {
+ fp_drop(p, fd, fp, 1);
proc_fdunlock(p);
- if ((ret = vnode_getwithref(vp)) == 0) {
- RAW_file_offset = fp->f_fglob->fg_offset;
- if (name[0] == KERN_KDWRITETR || name[0] == KERN_KDWRITETR_V3) {
- number = nkdbufs * sizeof(kd_buf);
+ ret = EBADF;
+ break;
+ }
+ vp = (struct vnode *)fp->f_fglob->fg_data;
+ proc_fdunlock(p);
+
+ if ((ret = vnode_getwithref(vp)) == 0) {
+ RAW_file_offset = fp->f_fglob->fg_offset;
+ if (name[0] == KERN_KDWRITETR || name[0] == KERN_KDWRITETR_V3) {
+ number = nkdbufs * sizeof(kd_buf);
- KERNEL_DEBUG_CONSTANT(TRACE_WRITING_EVENTS | DBG_FUNC_START, 0, 0, 0, 0, 0);
- if (name[0] == KERN_KDWRITETR_V3)
- ret = kdbg_read(0, &number, vp, &context, RAW_VERSION3);
- else
- ret = kdbg_read(0, &number, vp, &context, RAW_VERSION1);
- KERNEL_DEBUG_CONSTANT(TRACE_WRITING_EVENTS | DBG_FUNC_END, number, 0, 0, 0, 0);
+ KDBG_RELEASE(TRACE_WRITING_EVENTS | DBG_FUNC_START);
+ if (name[0] == KERN_KDWRITETR_V3) {
+ ret = kdbg_read(0, &number, vp, &context, RAW_VERSION3);
+ } else {
+ ret = kdbg_read(0, &number, vp, &context, RAW_VERSION1);
+ }
+ KDBG_RELEASE(TRACE_WRITING_EVENTS | DBG_FUNC_END, number);
- *sizep = number;
+ *sizep = number;
+ } else {
+ number = kd_mapcount * sizeof(kd_threadmap);
+ if (name[0] == KERN_KDWRITEMAP_V3) {
+ ret = kdbg_readthrmap_v3(0, number, fd);
} else {
- number = kd_mapcount * sizeof(kd_threadmap);
- if (name[0] == KERN_KDWRITEMAP_V3) {
- ret = kdbg_readthrmap_v3(0, number, fd);
- } else {
- ret = kdbg_write_thread_map(vp, &context);
- }
+ ret = kdbg_write_thread_map(vp, &context);
}
- fp->f_fglob->fg_offset = RAW_file_offset;
- vnode_put(vp);
}
- fp_drop(p, fd, fp, 0);
+ fp->f_fglob->fg_offset = RAW_file_offset;
+ vnode_put(vp);
+ }
+ fp_drop(p, fd, fp, 0);
+ break;
+ }
+ case KERN_KDBUFWAIT:
+ *sizep = kdbg_wait(size, false);
+ break;
+
+ case KERN_KDPIDTR:
+ if (size < sizeof(kd_regtype)) {
+ ret = EINVAL;
break;
}
- case KERN_KDBUFWAIT:
- *sizep = kdbg_wait(size, FALSE);
+ if (copyin(where, &kd_Reg, sizeof(kd_regtype))) {
+ ret = EINVAL;
break;
+ }
- case KERN_KDPIDTR:
- if (size < sizeof(kd_regtype)) {
- ret = EINVAL;
- break;
- }
- if (copyin(where, &kd_Reg, sizeof(kd_regtype))) {
- ret = EINVAL;
- break;
- }
+ ret = kdbg_setpid(&kd_Reg);
+ break;
- ret = kdbg_setpid(&kd_Reg);
+ case KERN_KDPIDEX:
+ if (size < sizeof(kd_regtype)) {
+ ret = EINVAL;
break;
-
- case KERN_KDPIDEX:
- if (size < sizeof(kd_regtype)) {
- ret = EINVAL;
- break;
- }
- if (copyin(where, &kd_Reg, sizeof(kd_regtype))) {
- ret = EINVAL;
- break;
- }
-
- ret = kdbg_setpidex(&kd_Reg);
+ }
+ if (copyin(where, &kd_Reg, sizeof(kd_regtype))) {
+ ret = EINVAL;
break;
+ }
- case KERN_KDCPUMAP:
- ret = kdbg_readcpumap(where, sizep);
- break;
+ ret = kdbg_setpidex(&kd_Reg);
+ break;
- case KERN_KDTHRMAP:
- ret = kdbg_copyout_thread_map(where, sizep);
- break;
+ case KERN_KDCPUMAP:
+ ret = kdbg_readcpumap(where, sizep);
+ break;
- case KERN_KDSET_TYPEFILTER: {
- ret = kdbg_copyin_typefilter(where, size);
- break;
- }
+ case KERN_KDTHRMAP:
+ ret = kdbg_copyout_thread_map(where, sizep);
+ break;
- case KERN_KDTEST:
- ret = kdbg_test();
- break;
+ case KERN_KDSET_TYPEFILTER: {
+ ret = kdbg_copyin_typefilter(where, size);
+ break;
+ }
- default:
- ret = EINVAL;
- break;
+ case KERN_KDTEST:
+ ret = kdbg_test(size);
+ break;
+
+ default:
+ ret = EINVAL;
+ break;
}
out:
- lck_mtx_unlock(ktrace_lock);
+ ktrace_unlock();
- return(ret);
+ return ret;
}
uint32_t rcursor;
kd_buf lostevent;
union kds_ptr kdsp;
+ bool traced_retrograde = false;
struct kd_storage *kdsp_actual;
struct kd_bufinfo *kdbp;
struct kd_bufinfo *min_kdbp;
uint32_t tempbuf_number;
uint32_t old_kdebug_flags;
uint32_t old_kdebug_slowcheck;
- boolean_t lostevents = FALSE;
- boolean_t out_of_events = FALSE;
- boolean_t wrapped = FALSE;
+ bool out_of_events = false;
+ bool wrapped = false;
assert(number);
- count = *number/sizeof(kd_buf);
+ count = *number / sizeof(kd_buf);
*number = 0;
- if (count == 0 || !(kd_ctrl_page.kdebug_flags & KDBG_BUFINIT) || kdcopybuf == 0)
+ ktrace_assert_lock_held();
+
+ if (count == 0 || !(kd_ctrl_page.kdebug_flags & KDBG_BUFINIT) || kdcopybuf == 0) {
return EINVAL;
+ }
thread_set_eager_preempt(current_thread());
memset(&lostevent, 0, sizeof(lostevent));
lostevent.debugid = TRACE_LOST_EVENTS;
- /*
- * Capture the current time. Only sort events that have occured
- * before now. Since the IOPs are being flushed here, it is possible
- * that events occur on the AP while running live tracing. If we are
- * disabled, no new events should occur on the AP.
- */
- if (kd_ctrl_page.enabled) {
- barrier_max = mach_absolute_time() & KDBG_TIMESTAMP_MASK;
- }
-
/*
* Request each IOP to provide us with up to date entries before merging
* buffers together.
*/
kdbg_iop_list_callback(kd_ctrl_page.kdebug_iops, KD_CALLBACK_SYNC_FLUSH, NULL);
+ /*
+ * Capture the current time. Only sort events that have occured
+ * before now. Since the IOPs are being flushed here, it is possible
+ * that events occur on the AP while running live tracing.
+ */
+ barrier_max = kdbg_timestamp() & KDBG_TIMESTAMP_MASK;
+
/*
* Disable wrap so storage units cannot be stolen out from underneath us
* while merging events.
*/
wrapped = disable_wrap(&old_kdebug_slowcheck, &old_kdebug_flags);
- if (count > nkdbufs)
+ if (count > nkdbufs) {
count = nkdbufs;
+ }
if ((tempbuf_count = count) > KDCOPYBUF_COUNT) {
tempbuf_count = KDCOPYBUF_COUNT;
}
/*
- * If the buffers have wrapped, capture the earliest time where there
- * are events for all CPUs and do not emit additional lost events for
+ * If the buffers have wrapped, do not emit additional lost events for the
* oldest storage units.
*/
if (wrapped) {
- barrier_min = kd_ctrl_page.oldest_time;
kd_ctrl_page.kdebug_flags &= ~KDBG_WRAPPED;
- kd_ctrl_page.oldest_time = 0;
for (cpu = 0, kdbp = &kdbip[0]; cpu < kd_ctrl_page.kdebug_cpus; cpu++, kdbp++) {
if ((kdsp = kdbp->kd_list_head).raw == KDS_PTR_NULL) {
continue;
}
kdsp_actual = POINTER_FROM_KDS_PTR(kdsp);
- kdsp_actual->kds_lostevents = FALSE;
+ kdsp_actual->kds_lostevents = false;
}
}
+ /*
+ * Capture the earliest time where there are events for all CPUs and don't
+ * emit events with timestamps prior.
+ */
+ barrier_min = kd_ctrl_page.oldest_time;
while (count) {
tempbuf = kdcopybuf;
tempbuf_number = 0;
if (wrapped) {
- /* Trace a single lost events event for wrapping. */
+ /*
+ * Emit a lost events tracepoint to indicate that previous events
+ * were lost -- the thread map cannot be trusted. A new one must
+ * be taken so tools can analyze the trace in a backwards-facing
+ * fashion.
+ */
kdbg_set_timestamp_and_cpu(&lostevent, barrier_min, 0);
*tempbuf = lostevent;
- wrapped = FALSE;
+ wrapped = false;
goto nextevent;
}
/* While space left in merged events scratch buffer. */
while (tempbuf_count) {
+ bool lostevents = false;
+ int lostcpu = 0;
earliest_time = UINT64_MAX;
min_kdbp = NULL;
min_cpu = 0;
- /* Check each CPU's buffers. */
+ /* Check each CPU's buffers for the earliest event. */
for (cpu = 0, kdbp = &kdbip[0]; cpu < kd_ctrl_page.kdebug_cpus; cpu++, kdbp++) {
- /* Skip CPUs without data. */
+ /* Skip CPUs without data in their oldest storage unit. */
if ((kdsp = kdbp->kd_list_head).raw == KDS_PTR_NULL) {
next_cpu:
continue;
}
- /* Debugging aid: maintain a copy of the "kdsp"
- * index.
- */
- volatile union kds_ptr kdsp_shadow;
-
- kdsp_shadow = kdsp;
-
/* From CPU data to buffer header to buffer. */
kdsp_actual = POINTER_FROM_KDS_PTR(kdsp);
- volatile struct kd_storage *kdsp_actual_shadow;
-
- kdsp_actual_shadow = kdsp_actual;
-
- /* Skip buffer if there are no events left. */
+next_event:
+ /* The next event to be read from this buffer. */
rcursor = kdsp_actual->kds_readlast;
+ /* Skip this buffer if there are no events left. */
if (rcursor == kdsp_actual->kds_bufindx) {
continue;
}
+ /*
+ * Check that this storage unit wasn't stolen and events were
+ * lost. This must have happened while wrapping was disabled
+ * in this function.
+ */
+ if (kdsp_actual->kds_lostevents) {
+ lostevents = true;
+ kdsp_actual->kds_lostevents = false;
+
+ /*
+ * The earliest event we can trust is the first one in this
+ * stolen storage unit.
+ */
+ uint64_t lost_time =
+ kdbg_get_timestamp(&kdsp_actual->kds_records[0]);
+ if (kd_ctrl_page.oldest_time < lost_time) {
+ /*
+ * If this is the first time we've seen lost events for
+ * this gap, record its timestamp as the oldest
+ * timestamp we're willing to merge for the lost events
+ * tracepoint.
+ */
+ kd_ctrl_page.oldest_time = barrier_min = lost_time;
+ lostcpu = cpu;
+ }
+ }
+
t = kdbg_get_timestamp(&kdsp_actual->kds_records[rcursor]);
- /* Ignore events that have aged out due to wrapping. */
- while (t < barrier_min) {
- rcursor = ++kdsp_actual->kds_readlast;
+ if (t > barrier_max) {
+ if (kdbg_debug) {
+ printf("kdebug: FUTURE EVENT: debugid %#8x: "
+ "time %lld from CPU %u "
+ "(barrier at time %lld, read %lu events)\n",
+ kdsp_actual->kds_records[rcursor].debugid,
+ t, cpu, barrier_max, *number + tempbuf_number);
+ }
+ goto next_cpu;
+ }
+ if (t < kdsp_actual->kds_timestamp) {
+ /*
+ * This indicates the event emitter hasn't completed
+ * filling in the event (becuase we're looking at the
+ * buffer that the record head is using). The max barrier
+ * timestamp should have saved us from seeing these kinds
+ * of things, but other CPUs might be slow on the up-take.
+ *
+ * Bail out so we don't get out-of-order events by
+ * continuing to read events from other CPUs' events.
+ */
+ out_of_events = true;
+ break;
+ }
+
+ /*
+ * Ignore events that have aged out due to wrapping or storage
+ * unit exhaustion while merging events.
+ */
+ if (t < barrier_min) {
+ kdsp_actual->kds_readlast++;
+ if (kdbg_debug) {
+ printf("kdebug: PAST EVENT: debugid %#8x: "
+ "time %lld from CPU %u "
+ "(barrier at time %lld)\n",
+ kdsp_actual->kds_records[rcursor].debugid,
+ t, cpu, barrier_min);
+ }
- if (rcursor >= EVENTS_PER_STORAGE_UNIT) {
+ if (kdsp_actual->kds_readlast >= EVENTS_PER_STORAGE_UNIT) {
release_storage_unit(cpu, kdsp.raw);
if ((kdsp = kdbp->kd_list_head).raw == KDS_PTR_NULL) {
goto next_cpu;
}
- kdsp_shadow = kdsp;
kdsp_actual = POINTER_FROM_KDS_PTR(kdsp);
- kdsp_actual_shadow = kdsp_actual;
- rcursor = kdsp_actual->kds_readlast;
}
- t = kdbg_get_timestamp(&kdsp_actual->kds_records[rcursor]);
+ goto next_event;
}
- if ((t > barrier_max) && (barrier_max > 0)) {
- /*
- * Need to flush IOPs again before we
- * can sort any more data from the
- * buffers.
- */
- out_of_events = TRUE;
- break;
- }
- if (t < kdsp_actual->kds_timestamp) {
- /*
- * indicates we've not yet completed filling
- * in this event...
- * this should only occur when we're looking
- * at the buf that the record head is utilizing
- * we'll pick these events up on the next
- * call to kdbg_read
- * we bail at this point so that we don't
- * get an out-of-order timestream by continuing
- * to read events from the other CPUs' timestream(s)
- */
- out_of_events = TRUE;
- break;
+ /*
+ * Don't worry about merging any events -- just walk through
+ * the CPUs and find the latest timestamp of lost events.
+ */
+ if (lostevents) {
+ continue;
}
+
if (t < earliest_time) {
earliest_time = t;
min_kdbp = kdbp;
min_cpu = cpu;
}
}
- if (min_kdbp == NULL || out_of_events == TRUE) {
+ if (lostevents) {
/*
- * all buffers ran empty
+ * If any lost events were hit in the buffers, emit an event
+ * with the latest timestamp.
*/
- out_of_events = TRUE;
+ kdbg_set_timestamp_and_cpu(&lostevent, barrier_min, lostcpu);
+ *tempbuf = lostevent;
+ tempbuf->arg1 = 1;
+ goto nextevent;
+ }
+ if (min_kdbp == NULL) {
+ /* All buffers ran empty. */
+ out_of_events = true;
+ }
+ if (out_of_events) {
break;
}
/* Copy earliest event into merged events scratch buffer. */
*tempbuf = kdsp_actual->kds_records[kdsp_actual->kds_readlast++];
- if (kdsp_actual->kds_readlast == EVENTS_PER_STORAGE_UNIT)
+ if (kdsp_actual->kds_readlast == EVENTS_PER_STORAGE_UNIT) {
release_storage_unit(min_cpu, kdsp.raw);
+ }
/*
- * Watch for out of order timestamps
+ * Watch for out of order timestamps (from IOPs).
*/
if (earliest_time < min_kdbp->kd_prev_timebase) {
/*
- * if so, use the previous timestamp + 1 cycle
+ * If we haven't already, emit a retrograde events event.
+ * Otherwise, ignore this event.
*/
- min_kdbp->kd_prev_timebase++;
+ if (traced_retrograde) {
+ continue;
+ }
+
kdbg_set_timestamp_and_cpu(tempbuf, min_kdbp->kd_prev_timebase, kdbg_get_cpu(tempbuf));
- } else
+ tempbuf->arg1 = tempbuf->debugid;
+ tempbuf->arg2 = earliest_time;
+ tempbuf->arg3 = 0;
+ tempbuf->arg4 = 0;
+ tempbuf->debugid = TRACE_RETROGRADE_EVENTS;
+ traced_retrograde = true;
+ } else {
min_kdbp->kd_prev_timebase = earliest_time;
+ }
nextevent:
tempbuf_count--;
tempbuf_number++;
tempbuf++;
- if ((RAW_file_written += sizeof(kd_buf)) >= RAW_FLUSH_SIZE)
+ if ((RAW_file_written += sizeof(kd_buf)) >= RAW_FLUSH_SIZE) {
break;
+ }
}
if (tempbuf_number) {
+ /*
+ * Remember the latest timestamp of events that we've merged so we
+ * don't think we've lost events later.
+ */
+ uint64_t latest_time = kdbg_get_timestamp(tempbuf - 1);
+ if (kd_ctrl_page.oldest_time < latest_time) {
+ kd_ctrl_page.oldest_time = latest_time;
+ }
if (file_version == RAW_VERSION3) {
- if ( !(kdbg_write_v3_event_chunk_header(buffer, V3_RAW_EVENTS, (tempbuf_number * sizeof(kd_buf)), vp, ctx))) {
+ if (!(kdbg_write_v3_event_chunk_header(buffer, V3_RAW_EVENTS, (tempbuf_number * sizeof(kd_buf)), vp, ctx))) {
error = EFAULT;
goto check_error;
}
- if (buffer)
+ if (buffer) {
buffer += (sizeof(kd_chunk_header_v3) + sizeof(uint64_t));
+ }
assert(count >= (sizeof(kd_chunk_header_v3) + sizeof(uint64_t)));
count -= (sizeof(kd_chunk_header_v3) + sizeof(uint64_t));
if (vp) {
size_t write_size = tempbuf_number * sizeof(kd_buf);
error = kdbg_write_to_vnode((caddr_t)kdcopybuf, write_size, vp, ctx, RAW_file_offset);
- if (!error)
+ if (!error) {
RAW_file_offset += write_size;
-
+ }
+
if (RAW_file_written >= RAW_FLUSH_SIZE) {
- cluster_push(vp, 0);
+ error = VNOP_FSYNC(vp, MNT_NOWAIT, ctx);
RAW_file_written = 0;
}
count -= tempbuf_number;
*number += tempbuf_number;
}
- if (out_of_events == TRUE)
- /*
- * all trace buffers are empty
- */
- break;
+ if (out_of_events == true) {
+ /*
+ * all trace buffers are empty
+ */
+ break;
+ }
- if ((tempbuf_count = count) > KDCOPYBUF_COUNT)
- tempbuf_count = KDCOPYBUF_COUNT;
+ if ((tempbuf_count = count) > KDCOPYBUF_COUNT) {
+ tempbuf_count = KDCOPYBUF_COUNT;
+ }
}
- if ( !(old_kdebug_flags & KDBG_NOWRAP)) {
- enable_wrap(old_kdebug_slowcheck, lostevents);
+ if (!(old_kdebug_flags & KDBG_NOWRAP)) {
+ enable_wrap(old_kdebug_slowcheck);
}
thread_clear_eager_preempt(current_thread());
- return (error);
+ return error;
+}
+
+#define KDEBUG_TEST_CODE(code) BSDDBG_CODE(DBG_BSD_KDEBUG_TEST, (code))
+
+/*
+ * A test IOP for the SYNC_FLUSH callback.
+ */
+
+static int sync_flush_iop = 0;
+
+static void
+sync_flush_callback(void * __unused context, kd_callback_type reason,
+ void * __unused arg)
+{
+ assert(sync_flush_iop > 0);
+
+ if (reason == KD_CALLBACK_SYNC_FLUSH) {
+ kernel_debug_enter(sync_flush_iop, KDEBUG_TEST_CODE(0xff),
+ kdbg_timestamp(), 0, 0, 0, 0, 0);
+ }
}
+static struct kd_callback sync_flush_kdcb = {
+ .func = sync_flush_callback,
+ .iop_name = "test_sf",
+};
+
static int
-kdbg_test(void)
+kdbg_test(size_t flavor)
{
-#define KDEBUG_TEST_CODE(code) BSDDBG_CODE(DBG_BSD_KDEBUG_TEST, (code))
int code = 0;
+ int dummy_iop = 0;
+
+ switch (flavor) {
+ case 1:
+ /* try each macro */
+ KDBG(KDEBUG_TEST_CODE(code)); code++;
+ KDBG(KDEBUG_TEST_CODE(code), 1); code++;
+ KDBG(KDEBUG_TEST_CODE(code), 1, 2); code++;
+ KDBG(KDEBUG_TEST_CODE(code), 1, 2, 3); code++;
+ KDBG(KDEBUG_TEST_CODE(code), 1, 2, 3, 4); code++;
+
+ KDBG_RELEASE(KDEBUG_TEST_CODE(code)); code++;
+ KDBG_RELEASE(KDEBUG_TEST_CODE(code), 1); code++;
+ KDBG_RELEASE(KDEBUG_TEST_CODE(code), 1, 2); code++;
+ KDBG_RELEASE(KDEBUG_TEST_CODE(code), 1, 2, 3); code++;
+ KDBG_RELEASE(KDEBUG_TEST_CODE(code), 1, 2, 3, 4); code++;
+
+ KDBG_FILTERED(KDEBUG_TEST_CODE(code)); code++;
+ KDBG_FILTERED(KDEBUG_TEST_CODE(code), 1); code++;
+ KDBG_FILTERED(KDEBUG_TEST_CODE(code), 1, 2); code++;
+ KDBG_FILTERED(KDEBUG_TEST_CODE(code), 1, 2, 3); code++;
+ KDBG_FILTERED(KDEBUG_TEST_CODE(code), 1, 2, 3, 4); code++;
+
+ KDBG_RELEASE_NOPROCFILT(KDEBUG_TEST_CODE(code)); code++;
+ KDBG_RELEASE_NOPROCFILT(KDEBUG_TEST_CODE(code), 1); code++;
+ KDBG_RELEASE_NOPROCFILT(KDEBUG_TEST_CODE(code), 1, 2); code++;
+ KDBG_RELEASE_NOPROCFILT(KDEBUG_TEST_CODE(code), 1, 2, 3); code++;
+ KDBG_RELEASE_NOPROCFILT(KDEBUG_TEST_CODE(code), 1, 2, 3, 4); code++;
+
+ KDBG_DEBUG(KDEBUG_TEST_CODE(code)); code++;
+ KDBG_DEBUG(KDEBUG_TEST_CODE(code), 1); code++;
+ KDBG_DEBUG(KDEBUG_TEST_CODE(code), 1, 2); code++;
+ KDBG_DEBUG(KDEBUG_TEST_CODE(code), 1, 2, 3); code++;
+ KDBG_DEBUG(KDEBUG_TEST_CODE(code), 1, 2, 3, 4); code++;
+ break;
- KDBG(KDEBUG_TEST_CODE(code)); code++;
- KDBG(KDEBUG_TEST_CODE(code), 1); code++;
- KDBG(KDEBUG_TEST_CODE(code), 1, 2); code++;
- KDBG(KDEBUG_TEST_CODE(code), 1, 2, 3); code++;
- KDBG(KDEBUG_TEST_CODE(code), 1, 2, 3, 4); code++;
-
- KDBG_RELEASE(KDEBUG_TEST_CODE(code)); code++;
- KDBG_RELEASE(KDEBUG_TEST_CODE(code), 1); code++;
- KDBG_RELEASE(KDEBUG_TEST_CODE(code), 1, 2); code++;
- KDBG_RELEASE(KDEBUG_TEST_CODE(code), 1, 2, 3); code++;
- KDBG_RELEASE(KDEBUG_TEST_CODE(code), 1, 2, 3, 4); code++;
-
- KDBG_FILTERED(KDEBUG_TEST_CODE(code)); code++;
- KDBG_FILTERED(KDEBUG_TEST_CODE(code), 1); code++;
- KDBG_FILTERED(KDEBUG_TEST_CODE(code), 1, 2); code++;
- KDBG_FILTERED(KDEBUG_TEST_CODE(code), 1, 2, 3); code++;
- KDBG_FILTERED(KDEBUG_TEST_CODE(code), 1, 2, 3, 4); code++;
-
- KDBG_DEBUG(KDEBUG_TEST_CODE(code)); code++;
- KDBG_DEBUG(KDEBUG_TEST_CODE(code), 1); code++;
- KDBG_DEBUG(KDEBUG_TEST_CODE(code), 1, 2); code++;
- KDBG_DEBUG(KDEBUG_TEST_CODE(code), 1, 2, 3); code++;
- KDBG_DEBUG(KDEBUG_TEST_CODE(code), 1, 2, 3, 4); code++;
+ case 2:
+ if (kd_ctrl_page.kdebug_iops) {
+ /* avoid the assertion in kernel_debug_enter for a valid IOP */
+ dummy_iop = kd_ctrl_page.kdebug_iops[0].cpu_id;
+ }
+
+ /* ensure old timestamps are not emitted from kernel_debug_enter */
+ kernel_debug_enter(dummy_iop, KDEBUG_TEST_CODE(code),
+ 100 /* very old timestamp */, 0, 0, 0, 0, 0);
+ code++;
+ kernel_debug_enter(dummy_iop, KDEBUG_TEST_CODE(code),
+ kdbg_timestamp(), 0, 0, 0, 0, 0);
+ code++;
+ break;
+
+ case 3:
+ if (kd_ctrl_page.kdebug_iops) {
+ dummy_iop = kd_ctrl_page.kdebug_iops[0].cpu_id;
+ }
+ kernel_debug_enter(dummy_iop, KDEBUG_TEST_CODE(code),
+ kdbg_timestamp() * 2 /* !!! */, 0, 0, 0, 0, 0);
+ break;
+
+ case 4:
+ if (!sync_flush_iop) {
+ sync_flush_iop = kernel_debug_register_callback(
+ sync_flush_kdcb);
+ assert(sync_flush_iop > 0);
+ }
+ break;
+
+ default:
+ return ENOTSUP;
+ }
return 0;
-#undef KDEBUG_TEST_CODE
}
+#undef KDEBUG_TEST_CODE
+
void
-kdebug_boot_trace(unsigned int n_events, char *filter_desc)
+kdebug_init(unsigned int n_events, char *filter_desc, bool wrapping)
{
assert(filter_desc != NULL);
-#if (defined(__i386__) || defined(__x86_64__))
+#if defined(__x86_64__)
/* only trace MACH events when outputting kdebug to serial */
if (kdebug_serial) {
n_events = 1;
filter_desc[2] = '\0';
}
}
-#endif
+#endif /* defined(__x86_64__) */
if (log_leaks && n_events == 0) {
n_events = 200000;
}
- kdebug_trace_start(n_events, filter_desc, FALSE);
+ kdebug_trace_start(n_events, filter_desc, wrapping, false);
}
static void
{
char *end = NULL;
- lck_mtx_assert(ktrace_lock, LCK_MTX_ASSERT_OWNED);
+ ktrace_assert_lock_held();
assert(filter_desc != NULL);
typefilter_allow_class(kdbg_typefilter, DBG_TRACE);
/* if the filter description starts with a number, assume it's a csc */
- if (filter_desc[0] >= '0' && filter_desc[0] <= '9'){
+ if (filter_desc[0] >= '0' && filter_desc[0] <= '9') {
unsigned long csc = strtoul(filter_desc, NULL, 0);
if (filter_desc != end && csc <= KDBG_CSC_MAX) {
typefilter_allow_csc(kdbg_typefilter, csc);
}
switch (filter_type) {
- case 'C':
- if (allow_value <= KDBG_CLASS_MAX) {
- typefilter_allow_class(kdbg_typefilter, allow_value);
- } else {
- /* illegal class */
- return;
- }
- break;
- case 'S':
- if (allow_value <= KDBG_CSC_MAX) {
- typefilter_allow_csc(kdbg_typefilter, allow_value);
- } else {
- /* illegal class subclass */
- return;
- }
- break;
- default:
+ case 'C':
+ if (allow_value <= KDBG_CLASS_MAX) {
+ typefilter_allow_class(kdbg_typefilter, allow_value);
+ } else {
+ /* illegal class */
return;
+ }
+ break;
+ case 'S':
+ if (allow_value <= KDBG_CSC_MAX) {
+ typefilter_allow_csc(kdbg_typefilter, allow_value);
+ } else {
+ /* illegal class subclass */
+ return;
+ }
+ break;
+ default:
+ return;
}
/* advance to next filter entry */
*/
void
kdebug_trace_start(unsigned int n_events, const char *filter_desc,
- boolean_t need_map)
+ bool wrapping, bool at_wake)
{
- uint32_t old1, old2;
-
if (!n_events) {
+ kd_early_done = true;
return;
}
- lck_mtx_lock(ktrace_lock);
+ ktrace_start_single_threaded();
kdbg_lock_init();
kernel_debug_string_early("start_kern_tracing");
- if (kdbg_reinit(TRUE)) {
+ if (kdbg_reinit(true)) {
printf("error from kdbg_reinit, kernel tracing not started\n");
goto out;
}
* Wrapping is disabled because boot and wake tracing is interested in
* the earliest events, at the expense of later ones.
*/
- (void)disable_wrap(&old1, &old2);
+ if (!wrapping) {
+ uint32_t old1, old2;
+ (void)disable_wrap(&old1, &old2);
+ }
if (filter_desc && filter_desc[0] != '\0') {
if (kdbg_initialize_typefilter(NULL) == KERN_SUCCESS) {
* Hold off interrupts between getting a thread map and enabling trace
* and until the early traces are recorded.
*/
- boolean_t s = ml_set_interrupts_enabled(FALSE);
+ bool s = ml_set_interrupts_enabled(false);
- if (need_map == TRUE) {
+ if (at_wake) {
kdbg_thrmap_init();
}
- kdbg_set_tracing_enabled(TRUE, kdebug_serial ?
- (KDEBUG_ENABLE_TRACE | KDEBUG_ENABLE_SERIAL) :
- KDEBUG_ENABLE_TRACE);
+ kdbg_set_tracing_enabled(true, KDEBUG_ENABLE_TRACE | (kdebug_serial ?
+ KDEBUG_ENABLE_SERIAL : 0));
- /*
- * Transfer all very early events from the static buffer into the real
- * buffers.
- */
- kernel_debug_early_end();
+ if (!at_wake) {
+ /*
+ * Transfer all very early events from the static buffer into the real
+ * buffers.
+ */
+ kernel_debug_early_end();
+ }
ml_set_interrupts_enabled(s);
#if KDEBUG_MOJO_TRACE
if (kdebug_serial) {
printf("serial output enabled with %lu named events\n",
- sizeof(kd_events)/sizeof(kd_event_t));
+ sizeof(kd_events) / sizeof(kd_event_t));
}
-#endif
+#endif /* KDEBUG_MOJO_TRACE */
out:
- lck_mtx_unlock(ktrace_lock);
+ ktrace_end_single_threaded();
}
void
vfs_context_t ctx;
vnode_t vp;
size_t write_size;
+ int ret;
- lck_mtx_lock(ktrace_lock);
+ ktrace_lock();
if (!(kdebug_enable & KDEBUG_ENABLE_TRACE)) {
goto out;
if (ktrace_get_owning_pid() != 0) {
/*
* Another process owns ktrace and is still active, disable tracing to
- * capture whatever was being recorded.
+ * prevent wrapping.
*/
kdebug_enable = 0;
kd_ctrl_page.enabled = 0;
goto out;
}
- KERNEL_DEBUG_CONSTANT(TRACE_PANIC | DBG_FUNC_NONE, 0, 0, 0, 0, 0);
+ KDBG_RELEASE(TRACE_WRITING_EVENTS | DBG_FUNC_START);
kdebug_enable = 0;
kd_ctrl_page.enabled = 0;
kdbg_write_thread_map(vp, ctx);
write_size = nkdbufs * sizeof(kd_buf);
- kdbg_read(0, &write_size, vp, ctx, RAW_VERSION1);
+ ret = kdbg_read(0, &write_size, vp, ctx, RAW_VERSION1);
+ if (ret) {
+ goto out_close;
+ }
+
+ /*
+ * Wait to synchronize the file to capture the I/O in the
+ * TRACE_WRITING_EVENTS interval.
+ */
+ ret = VNOP_FSYNC(vp, MNT_WAIT, ctx);
+
+ /*
+ * Balance the starting TRACE_WRITING_EVENTS tracepoint manually.
+ */
+ kd_buf end_event = {
+ .debugid = TRACE_WRITING_EVENTS | DBG_FUNC_END,
+ .arg1 = write_size,
+ .arg2 = ret,
+ .arg5 = thread_tid(current_thread()),
+ };
+ kdbg_set_timestamp_and_cpu(&end_event, kdbg_timestamp(),
+ cpu_number());
+ /* this is best effort -- ignore any errors */
+ (void)kdbg_write_to_vnode((caddr_t)&end_event, sizeof(kd_buf), vp, ctx,
+ RAW_file_offset);
+
+out_close:
vnode_close(vp, FWRITE, ctx);
sync(current_proc(), (void *)NULL, (int *)NULL);
out:
- lck_mtx_unlock(ktrace_lock);
+ ktrace_unlock();
}
-/* Helper function for filling in the BSD name for an address space
- * Defined here because the machine bindings know only Mach threads
- * and nothing about BSD processes.
- *
- * FIXME: need to grab a lock during this?
- */
-void kdbg_get_task_name(char* name_buf, int len, task_t task)
+static int
+kdbg_sysctl_continuous SYSCTL_HANDLER_ARGS
{
- proc_t proc;
-
- /* Note: we can't use thread->task (and functions that rely on it) here
- * because it hasn't been initialized yet when this function is called.
- * We use the explicitly-passed task parameter instead.
- */
- proc = get_bsdtask_info(task);
- if (proc != PROC_NULL)
- snprintf(name_buf, len, "%s/%d", proc->p_comm, proc->p_pid);
- else
- snprintf(name_buf, len, "%p [!bsd]", task);
+#pragma unused(oidp, arg1, arg2)
+ int value = kdbg_continuous_time;
+ int ret = sysctl_io_number(req, value, sizeof(value), &value, NULL);
+
+ if (ret || !req->newptr) {
+ return ret;
+ }
+
+ kdbg_continuous_time = value;
+ return 0;
}
+SYSCTL_NODE(_kern, OID_AUTO, kdbg, CTLFLAG_RD | CTLFLAG_LOCKED, 0,
+ "kdbg");
+
+SYSCTL_PROC(_kern_kdbg, OID_AUTO, experimental_continuous,
+ CTLTYPE_INT | CTLFLAG_RW | CTLFLAG_LOCKED, 0,
+ sizeof(int), kdbg_sysctl_continuous, "I",
+ "Set kdebug to use mach_continuous_time");
+
+SYSCTL_INT(_kern_kdbg, OID_AUTO, debug,
+ CTLFLAG_RW | CTLFLAG_LOCKED,
+ &kdbg_debug, 0, "Set kdebug debug mode");
+
+SYSCTL_QUAD(_kern_kdbg, OID_AUTO, oldest_time,
+ CTLTYPE_QUAD | CTLFLAG_RD | CTLFLAG_LOCKED,
+ &kd_ctrl_page.oldest_time,
+ "Find the oldest timestamp still in trace");
+
#if KDEBUG_MOJO_TRACE
static kd_event_t *
binary_search(uint32_t id)
int low, high, mid;
low = 0;
- high = sizeof(kd_events)/sizeof(kd_event_t) - 1;
+ high = (int)(sizeof(kd_events) / sizeof(kd_event_t)) - 1;
- while (TRUE)
- {
+ while (true) {
mid = (low + high) / 2;
- if (low > high)
+ if (low > high) {
return NULL; /* failed */
- else if ( low + 1 >= high) {
+ } else if (low + 1 >= high) {
/* We have a match */
- if (kd_events[high].id == id)
+ if (kd_events[high].id == id) {
return &kd_events[high];
- else if (kd_events[low].id == id)
+ } else if (kd_events[low].id == id) {
return &kd_events[low];
- else
+ } else {
return NULL; /* search failed */
- }
- else if (id < kd_events[mid].id)
+ }
+ } else if (id < kd_events[mid].id) {
high = mid;
- else
+ } else {
low = mid;
- }
+ }
+ }
}
/*
* Using a per-cpu cache of a single entry
* before resorting to a binary search of the full table.
*/
-#define NCACHE 1
-static kd_event_t *last_hit[MAX_CPUS];
+#define NCACHE 1
+static kd_event_t *last_hit[MAX_CPUS];
static kd_event_t *
event_lookup_cache(uint32_t cpu, uint32_t id)
{
- if (last_hit[cpu] == NULL || last_hit[cpu]->id != id)
+ if (last_hit[cpu] == NULL || last_hit[cpu]->id != id) {
last_hit[cpu] = binary_search(id);
+ }
return last_hit[cpu];
}
-static uint64_t kd_last_timstamp;
+static uint64_t kd_last_timstamp;
static void
kdebug_serial_print(
- uint32_t cpunum,
- uint32_t debugid,
- uint64_t timestamp,
- uintptr_t arg1,
- uintptr_t arg2,
- uintptr_t arg3,
- uintptr_t arg4,
- uintptr_t threadid
+ uint32_t cpunum,
+ uint32_t debugid,
+ uint64_t timestamp,
+ uintptr_t arg1,
+ uintptr_t arg2,
+ uintptr_t arg3,
+ uintptr_t arg4,
+ uintptr_t threadid
)
{
- char kprintf_line[192];
- char event[40];
- uint64_t us = timestamp / NSEC_PER_USEC;
- uint64_t us_tenth = (timestamp % NSEC_PER_USEC) / 100;
- uint64_t delta = timestamp - kd_last_timstamp;
- uint64_t delta_us = delta / NSEC_PER_USEC;
- uint64_t delta_us_tenth = (delta % NSEC_PER_USEC) / 100;
- uint32_t event_id = debugid & KDBG_EVENTID_MASK;
- const char *command;
- const char *bra;
- const char *ket;
- kd_event_t *ep;
+ char kprintf_line[192];
+ char event[40];
+ uint64_t us = timestamp / NSEC_PER_USEC;
+ uint64_t us_tenth = (timestamp % NSEC_PER_USEC) / 100;
+ uint64_t delta = timestamp - kd_last_timstamp;
+ uint64_t delta_us = delta / NSEC_PER_USEC;
+ uint64_t delta_us_tenth = (delta % NSEC_PER_USEC) / 100;
+ uint32_t event_id = debugid & KDBG_EVENTID_MASK;
+ const char *command;
+ const char *bra;
+ const char *ket;
+ kd_event_t *ep;
/* event time and delta from last */
snprintf(kprintf_line, sizeof(kprintf_line),
- "%11llu.%1llu %8llu.%1llu ",
- us, us_tenth, delta_us, delta_us_tenth);
+ "%11llu.%1llu %8llu.%1llu ",
+ us, us_tenth, delta_us, delta_us_tenth);
/* event (id or name) - start prefixed by "[", end postfixed by "]" */
ket = (debugid & DBG_FUNC_END) ? "]" : " ";
ep = event_lookup_cache(cpunum, event_id);
if (ep) {
- if (strlen(ep->name) < sizeof(event) - 3)
+ if (strlen(ep->name) < sizeof(event) - 3) {
snprintf(event, sizeof(event), "%s%s%s",
- bra, ep->name, ket);
- else
+ bra, ep->name, ket);
+ } else {
snprintf(event, sizeof(event), "%s%x(name too long)%s",
- bra, event_id, ket);
+ bra, event_id, ket);
+ }
} else {
snprintf(event, sizeof(event), "%s%x%s",
- bra, event_id, ket);
+ bra, event_id, ket);
}
snprintf(kprintf_line + strlen(kprintf_line),
- sizeof(kprintf_line) - strlen(kprintf_line),
- "%-40s ", event);
+ sizeof(kprintf_line) - strlen(kprintf_line),
+ "%-40s ", event);
/* arg1 .. arg4 with special cases for strings */
switch (event_id) {
- case VFS_LOOKUP:
- case VFS_LOOKUP_DONE:
+ case VFS_LOOKUP:
+ case VFS_LOOKUP_DONE:
if (debugid & DBG_FUNC_START) {
/* arg1 hex then arg2..arg4 chars */
snprintf(kprintf_line + strlen(kprintf_line),
- sizeof(kprintf_line) - strlen(kprintf_line),
- "%-16lx %-8s%-8s%-8s ",
- arg1, (char*)&arg2, (char*)&arg3, (char*)&arg4);
+ sizeof(kprintf_line) - strlen(kprintf_line),
+ "%-16lx %-8s%-8s%-8s ",
+ arg1, (char*)&arg2, (char*)&arg3, (char*)&arg4);
break;
}
- /* else fall through for arg1..arg4 chars */
- case TRACE_STRING_EXEC:
- case TRACE_STRING_NEWTHREAD:
- case TRACE_INFO_STRING:
+ /* else fall through for arg1..arg4 chars */
+ case TRACE_STRING_EXEC:
+ case TRACE_STRING_NEWTHREAD:
+ case TRACE_INFO_STRING:
snprintf(kprintf_line + strlen(kprintf_line),
- sizeof(kprintf_line) - strlen(kprintf_line),
- "%-8s%-8s%-8s%-8s ",
- (char*)&arg1, (char*)&arg2, (char*)&arg3, (char*)&arg4);
+ sizeof(kprintf_line) - strlen(kprintf_line),
+ "%-8s%-8s%-8s%-8s ",
+ (char*)&arg1, (char*)&arg2, (char*)&arg3, (char*)&arg4);
break;
- default:
+ default:
snprintf(kprintf_line + strlen(kprintf_line),
- sizeof(kprintf_line) - strlen(kprintf_line),
- "%-16lx %-16lx %-16lx %-16lx",
- arg1, arg2, arg3, arg4);
+ sizeof(kprintf_line) - strlen(kprintf_line),
+ "%-16lx %-16lx %-16lx %-16lx",
+ arg1, arg2, arg3, arg4);
}
/* threadid, cpu and command name */
if (threadid == (uintptr_t)thread_tid(current_thread()) &&
current_proc() &&
- current_proc()->p_comm[0])
+ current_proc()->p_comm[0]) {
command = current_proc()->p_comm;
- else
+ } else {
command = "-";
+ }
snprintf(kprintf_line + strlen(kprintf_line),
- sizeof(kprintf_line) - strlen(kprintf_line),
- " %-16lx %-2d %s\n",
- threadid, cpunum, command);
-
+ sizeof(kprintf_line) - strlen(kprintf_line),
+ " %-16lx %-2d %s\n",
+ threadid, cpunum, command);
+
kprintf("%s", kprintf_line);
kd_last_timstamp = timestamp;
}
projects / apple / xnu.git / blobdiff