/*
* Copyright (c) 2000-2006 Apple Computer, Inc. All rights reserved.
*
* @Apple_LICENSE_HEADER_START@
*
* The contents of this file constitute Original Code as defined in and
* are subject to the Apple Public Source License Version 1.1 (the
* "License"). You may not use this file except in compliance with the
* License. Please obtain a copy of the License at
* http://www.apple.com/publicsource and read it before using this file.
*
* This Original Code and all software distributed under the License are
* distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY KIND, EITHER
* EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
* INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE OR NON-INFRINGEMENT. Please see the
* License for the specific language governing rights and limitations
* under the License.
*
* @APPLE_OSREFERENCE_LICENSE_HEADER_END@
*/
#include <machine/spl.h>
#include <sys/errno.h>
#include <sys/param.h>
#include <sys/systm.h>
#include <sys/proc_internal.h>
#include <sys/vm.h>
#include <sys/sysctl.h>
#include <sys/kdebug.h>
#include <sys/sysproto.h>
#include <sys/bsdtask_info.h>
#define HZ 100
#include <mach/clock_types.h>
#include <mach/mach_types.h>
#include <mach/mach_time.h>
#include <machine/machine_routines.h>
#if defined(__i386__) || defined(__x86_64__)
#include <i386/rtclock_protos.h>
#include <i386/mp.h>
#include <i386/machine_routines.h>
#endif
#include <kern/clock.h>
#include <kern/thread.h>
#include <kern/task.h>
#include <kern/debug.h>
#include <kern/kalloc.h>
#include <kern/cpu_data.h>
#include <kern/assert.h>
#include <vm/vm_kern.h>
#include <sys/lock.h>
#include <sys/malloc.h>
#include <sys/mcache.h>
#include <sys/kauth.h>
#include <sys/vnode.h>
#include <sys/vnode_internal.h>
#include <sys/fcntl.h>
#include <sys/file_internal.h>
#include <sys/ubc.h>
#include <mach/mach_host.h> /* for host_info() */
#include <libkern/OSAtomic.h>
#include <machine/pal_routines.h>
/* XXX should have prototypes, but Mach does not provide one */
void task_act_iterate_wth_args(task_t, void(*)(thread_t, void *), void *);
int cpu_number(void); /* XXX <machine/...> include path broken */
/* XXX should probably be static, but it's debugging code... */
int kdbg_read(user_addr_t, size_t *, vnode_t, vfs_context_t);
void kdbg_control_chud(int, void *);
int kdbg_control(int *, u_int, user_addr_t, size_t *);
int kdbg_getentropy (user_addr_t, size_t *, int);
int kdbg_readmap(user_addr_t, size_t *, vnode_t, vfs_context_t);
int kdbg_getreg(kd_regtype *);
int kdbg_setreg(kd_regtype *);
int kdbg_setrtcdec(kd_regtype *);
int kdbg_setpidex(kd_regtype *);
int kdbg_setpid(kd_regtype *);
void kdbg_mapinit(void);
int kdbg_reinit(boolean_t);
int kdbg_bootstrap(boolean_t);
static int create_buffers(boolean_t);
static void delete_buffers(void);
extern void IOSleep(int);
/* trace enable status */
unsigned int kdebug_enable = 0;
/* track timestamps for security server's entropy needs */
uint64_t * kd_entropy_buffer = 0;
unsigned int kd_entropy_bufsize = 0;
unsigned int kd_entropy_count = 0;
unsigned int kd_entropy_indx = 0;
vm_offset_t kd_entropy_buftomem = 0;
#define MAX_ENTROPY_COUNT (128 * 1024)
#define SLOW_NOLOG 0x01
#define SLOW_CHECKS 0x02
#define SLOW_ENTROPY 0x04
#define SLOW_CHUD 0x08
unsigned int kd_cpus;
#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])
#define NATIVE_TRACE_FACILITY
union kds_ptr {
struct {
uint32_t buffer_index:21;
uint16_t offset:11;
};
uint32_t raw;
};
struct kd_storage {
union kds_ptr kds_next;
uint32_t kds_bufindx;
uint32_t kds_bufcnt;
uint32_t kds_readlast;
boolean_t kds_lostevents;
uint64_t kds_timestamp;
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))
struct kd_storage_buffers {
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 kde_waiter = 0;
#pragma pack(0)
struct kd_bufinfo {
union kds_ptr kd_list_head;
union kds_ptr kd_list_tail;
boolean_t kd_lostevents;
uint32_t _pad;
uint64_t kd_prev_timebase;
uint32_t num_bufs;
} __attribute__(( aligned(CPU_CACHE_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 kdebug_flags;
uint32_t kdebug_slowcheck;
uint32_t _pad1;
struct {
uint64_t tsc_base;
uint64_t ns_base;
} cpu_timebase[32]; // should be max number of actual logical cpus
} kd_ctrl_page = {.kds_free_list = {.raw = KDS_PTR_NULL}, .enabled = 0, .kds_inuse_count = 0, .kdebug_flags = 0, .kdebug_slowcheck = SLOW_NOLOG};
#pragma pack()
struct kd_bufinfo *kdbip = NULL;
#define KDCOPYBUF_COUNT 8192
#define KDCOPYBUF_SIZE (KDCOPYBUF_COUNT * sizeof(kd_buf))
kd_buf *kdcopybuf = NULL;
unsigned int nkdbufs = 8192;
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;
static lck_mtx_t * kd_trace_mtx_sysctl;
static lck_grp_t * kd_trace_mtx_sysctl_grp;
static lck_attr_t * kd_trace_mtx_sysctl_attr;
static lck_grp_attr_t *kd_trace_mtx_sysctl_grp_attr;
static lck_grp_t *stackshot_subsys_lck_grp;
static lck_grp_attr_t *stackshot_subsys_lck_grp_attr;
static lck_attr_t *stackshot_subsys_lck_attr;
static lck_mtx_t stackshot_subsys_mutex;
void *stackshot_snapbuf = NULL;
int
stack_snapshot2(pid_t pid, user_addr_t tracebuf, uint32_t tracebuf_size, uint32_t flags, uint32_t dispatch_offset, int32_t *retval);
extern void
kdp_snapshot_preflight(int pid, void *tracebuf, uint32_t tracebuf_size, uint32_t flags, uint32_t dispatch_offset);
extern int
kdp_stack_snapshot_geterror(void);
extern unsigned int
kdp_stack_snapshot_bytes_traced(void);
kd_threadmap *kd_mapptr = 0;
unsigned int kd_mapsize = 0;
unsigned int kd_mapcount = 0;
vm_offset_t kd_maptomem = 0;
off_t RAW_file_offset = 0;
int RAW_file_written = 0;
#define RAW_FLUSH_SIZE (2 * 1024 * 1024)
pid_t global_state_pid = -1; /* Used to control exclusive use of kd_buffer */
#define DBG_FUNC_MASK 0xfffffffc
#define INTERRUPT 0x01050000
#define MACH_vmfault 0x01300008
#define BSC_SysCall 0x040c0000
#define MACH_SysCall 0x010c0000
#define DBG_SCALL_MASK 0xffff0000
/* 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 */
};
typedef struct tts tts_t;
struct krt
{
kd_threadmap *map; /* pointer to the map buffer */
int count;
int maxcount;
struct tts *atts;
};
typedef struct krt krt_t;
/* This is for the CHUD toolkit call */
typedef void (*kd_chudhook_fn) (uint32_t debugid, uintptr_t arg1,
uintptr_t arg2, uintptr_t arg3,
uintptr_t arg4, uintptr_t arg5);
volatile kd_chudhook_fn kdebug_chudhook = 0; /* pointer to CHUD toolkit function */
__private_extern__ void stackshot_lock_init( void ) __attribute__((section("__TEXT, initcode")));
static void
kdbg_set_tracing_enabled(boolean_t enabled)
{
int s = ml_set_interrupts_enabled(FALSE);
lck_spin_lock(kds_spin_lock);
if (enabled) {
kdebug_enable |= KDEBUG_ENABLE_TRACE;
kd_ctrl_page.kdebug_slowcheck &= ~SLOW_NOLOG;
kd_ctrl_page.enabled = 1;
} else {
kdebug_enable &= ~KDEBUG_ENABLE_TRACE;
kd_ctrl_page.kdebug_slowcheck |= SLOW_NOLOG;
kd_ctrl_page.enabled = 0;
}
lck_spin_unlock(kds_spin_lock);
ml_set_interrupts_enabled(s);
}
static void
kdbg_set_flags(int slowflag, int enableflag, boolean_t enabled)
{
int s = ml_set_interrupts_enabled(FALSE);
lck_spin_lock(kds_spin_lock);
if (enabled) {
kd_ctrl_page.kdebug_slowcheck |= slowflag;
kdebug_enable |= enableflag;
} else {
kd_ctrl_page.kdebug_slowcheck &= ~slowflag;
kdebug_enable &= ~enableflag;
}
lck_spin_unlock(kds_spin_lock);
ml_set_interrupts_enabled(s);
}
#ifdef NATIVE_TRACE_FACILITY
void
disable_wrap(uint32_t *old_slowcheck, uint32_t *old_flags)
{
int s = ml_set_interrupts_enabled(FALSE);
lck_spin_lock(kds_spin_lock);
*old_slowcheck = kd_ctrl_page.kdebug_slowcheck;
*old_flags = kd_ctrl_page.kdebug_flags;
kd_ctrl_page.kdebug_flags &= ~KDBG_WRAPPED;
kd_ctrl_page.kdebug_flags |= KDBG_NOWRAP;
lck_spin_unlock(kds_spin_lock);
ml_set_interrupts_enabled(s);
}
void
enable_wrap(uint32_t old_slowcheck, boolean_t lostevents)
{
int s = ml_set_interrupts_enabled(FALSE);
lck_spin_lock(kds_spin_lock);
kd_ctrl_page.kdebug_flags &= ~KDBG_NOWRAP;
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);
}
void trace_set_timebases(__unused uint64_t tsc, __unused uint64_t ns)
{
}
#else
/* Begin functions that are defined twice */
void trace_set_timebases(uint64_t tsc, uint64_t ns)
{
int cpu = cpu_number();
kd_ctrl_page.cpu_timebase[cpu].tsc_base = tsc;
kd_ctrl_page.cpu_timebase[cpu].ns_base = ns;
}
#endif
static int
#if defined(__i386__) || defined(__x86_64__)
create_buffers(boolean_t early_trace)
#else
create_buffers(__unused boolean_t early_trace)
#endif
{
int i;
int p_buffer_size;
int f_buffer_size;
int f_buffers;
int error = 0;
/*
* get the number of cpus and cache it
*/
#if defined(__i386__) || defined(__x86_64__)
if (early_trace == TRUE) {
/*
* we've started tracing before the
* IOKit has even started running... just
* use the static max value
*/
kd_cpus = max_ncpus;
} else
#endif
{
host_basic_info_data_t hinfo;
mach_msg_type_number_t count = HOST_BASIC_INFO_COUNT;
#define BSD_HOST 1
host_info((host_t)BSD_HOST, HOST_BASIC_INFO, (host_info_t)&hinfo, &count);
kd_cpus = hinfo.logical_cpu_max;
}
if (kmem_alloc(kernel_map, (vm_offset_t *)&kdbip, sizeof(struct kd_bufinfo) * kd_cpus) != KERN_SUCCESS) {
error = ENOSPC;
goto out;
}
trace_handler_map_bufinfo((uintptr_t)kdbip, sizeof(struct kd_bufinfo) * kd_cpus);
#if !defined(NATIVE_TRACE_FACILITY)
for(i=0;i<(int)kd_cpus;i++) {
get_nanotime_timebases(i,
&kd_ctrl_page.cpu_timebase[i].tsc_base,
&kd_ctrl_page.cpu_timebase[i].ns_base);
}
#endif
if (nkdbufs < (kd_cpus * EVENTS_PER_STORAGE_UNIT * MIN_STORAGE_UNITS_PER_CPU))
n_storage_units = kd_cpus * MIN_STORAGE_UNITS_PER_CPU;
else
n_storage_units = nkdbufs / EVENTS_PER_STORAGE_UNIT;
nkdbufs = n_storage_units * EVENTS_PER_STORAGE_UNIT;
f_buffers = n_storage_units / N_STORAGE_UNITS_PER_BUFFER;
n_storage_buffers = f_buffers;
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)
n_storage_buffers++;
kd_bufs = NULL;
if (kdcopybuf == 0) {
if (kmem_alloc(kernel_map, (vm_offset_t *)&kdcopybuf, (vm_size_t)KDCOPYBUF_SIZE) != KERN_SUCCESS) {
error = ENOSPC;
goto out;
}
}
if (kmem_alloc(kernel_map, (vm_offset_t *)&kd_bufs, (vm_size_t)(n_storage_buffers * sizeof(struct kd_storage_buffers))) != KERN_SUCCESS) {
error = ENOSPC;
goto out;
}
bzero(kd_bufs, n_storage_buffers * sizeof(struct kd_storage_buffers));
for (i = 0; i < f_buffers; i++) {
if (kmem_alloc(kernel_map, (vm_offset_t *)&kd_bufs[i].kdsb_addr, (vm_size_t)f_buffer_size) != KERN_SUCCESS) {
error = ENOSPC;
goto out;
}
bzero(kd_bufs[i].kdsb_addr, f_buffer_size);
kd_bufs[i].kdsb_size = f_buffer_size;
}
if (p_buffer_size) {
if (kmem_alloc(kernel_map, (vm_offset_t *)&kd_bufs[i].kdsb_addr, (vm_size_t)p_buffer_size) != KERN_SUCCESS) {
error = ENOSPC;
goto out;
}
bzero(kd_bufs[i].kdsb_addr, p_buffer_size);
kd_bufs[i].kdsb_size = p_buffer_size;
}
n_storage_units = 0;
for (i = 0; i < n_storage_buffers; i++) {
struct kd_storage *kds;
int n_elements;
int n;
n_elements = kd_bufs[i].kdsb_size / sizeof(struct kd_storage);
kds = kd_bufs[i].kdsb_addr;
trace_handler_map_buffer(i, (uintptr_t)kd_bufs[i].kdsb_addr, kd_bufs[i].kdsb_size);
for (n = 0; n < n_elements; n++) {
kds[n].kds_next.buffer_index = kd_ctrl_page.kds_free_list.buffer_index;
kds[n].kds_next.offset = kd_ctrl_page.kds_free_list.offset;
kd_ctrl_page.kds_free_list.buffer_index = i;
kd_ctrl_page.kds_free_list.offset = n;
}
n_storage_units += n_elements;
}
bzero((char *)kdbip, sizeof(struct kd_bufinfo) * kd_cpus);
for (i = 0; i < (int)kd_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].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)
delete_buffers();
return(error);
}
static void
delete_buffers(void)
{
int i;
if (kd_bufs) {
for (i = 0; i < n_storage_buffers; i++) {
if (kd_bufs[i].kdsb_addr) {
kmem_free(kernel_map, (vm_offset_t)kd_bufs[i].kdsb_addr, (vm_size_t)kd_bufs[i].kdsb_size);
trace_handler_unmap_buffer(i);
}
}
kmem_free(kernel_map, (vm_offset_t)kd_bufs, (vm_size_t)(n_storage_buffers * sizeof(struct kd_storage_buffers)));
kd_bufs = NULL;
n_storage_buffers = 0;
}
if (kdcopybuf) {
kmem_free(kernel_map, (vm_offset_t)kdcopybuf, KDCOPYBUF_SIZE);
kdcopybuf = NULL;
}
kd_ctrl_page.kds_free_list.raw = KDS_PTR_NULL;
if (kdbip) {
trace_handler_unmap_bufinfo();
kmem_free(kernel_map, (vm_offset_t)kdbip, sizeof(struct kd_bufinfo) * kd_cpus);
kdbip = NULL;
}
kd_ctrl_page.kdebug_flags &= ~KDBG_BUFINIT;
}
#ifdef NATIVE_TRACE_FACILITY
void
release_storage_unit(int cpu, uint32_t kdsp_raw)
{
int s = 0;
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);
kdbp = &kdbip[cpu];
if (kdsp.raw == kdbp->kd_list_head.raw) {
/*
* 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
* adding and removing from the queue...
* since we only ever release and steal units from
* that position, if it's no longer the head
* we having nothing to do in this context
*/
kdsp_actual = POINTER_FROM_KDS_PTR(kdsp);
kdbp->kd_list_head = kdsp_actual->kds_next;
kdsp_actual->kds_next = kd_ctrl_page.kds_free_list;
kd_ctrl_page.kds_free_list = kdsp;
kd_ctrl_page.kds_inuse_count--;
}
lck_spin_unlock(kds_spin_lock);
ml_set_interrupts_enabled(s);
}
boolean_t
allocate_storage_unit(int cpu)
{
union kds_ptr kdsp;
struct kd_storage *kdsp_actual;
struct kd_bufinfo *kdbp, *kdbp_vict, *kdbp_try;
uint64_t oldest_ts, ts;
boolean_t retval = TRUE;
int s = 0;
s = ml_set_interrupts_enabled(FALSE);
lck_spin_lock(kds_spin_lock);
kdbp = &kdbip[cpu];
/* If someone beat us to the allocate, return success */
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)
goto out;
}
if ((kdsp = kd_ctrl_page.kds_free_list).raw != KDS_PTR_NULL) {
kdsp_actual = POINTER_FROM_KDS_PTR(kdsp);
kd_ctrl_page.kds_free_list = kdsp_actual->kds_next;
kd_ctrl_page.kds_inuse_count++;
} else {
if (kd_ctrl_page.kdebug_flags & KDBG_NOWRAP) {
kd_ctrl_page.kdebug_slowcheck |= SLOW_NOLOG;
kdbp->kd_lostevents = TRUE;
retval = FALSE;
goto out;
}
kdbp_vict = NULL;
oldest_ts = (uint64_t)-1;
for (kdbp_try = &kdbip[0]; kdbp_try < &kdbip[kd_cpus]; kdbp_try++) {
if (kdbp_try->kd_list_head.raw == KDS_PTR_NULL) {
/*
* no storage unit to steal
*/
continue;
}
kdsp_actual = POINTER_FROM_KDS_PTR(kdbp_try->kd_list_head);
if (kdsp_actual->kds_bufcnt < EVENTS_PER_STORAGE_UNIT) {
/*
* make sure we don't steal the storage unit
* being actively recorded to... need to
* move on because we don't want an out-of-order
* set of events showing up later
*/
continue;
}
ts = kdbg_get_timestamp(&kdsp_actual->kds_records[0]);
if (ts < oldest_ts) {
/*
* when 'wrapping', we want to steal the
* storage unit that has the 'earliest' time
* associated with it (first event time)
*/
oldest_ts = ts;
kdbp_vict = kdbp_try;
}
}
if (kdbp_vict == NULL) {
kdebug_enable = 0;
kd_ctrl_page.enabled = 0;
retval = FALSE;
goto out;
}
kdsp = kdbp_vict->kd_list_head;
kdsp_actual = POINTER_FROM_KDS_PTR(kdsp);
kdbp_vict->kd_list_head = kdsp_actual->kds_next;
kd_ctrl_page.kdebug_flags |= KDBG_WRAPPED;
}
kdsp_actual->kds_timestamp = mach_absolute_time();
kdsp_actual->kds_next.raw = KDS_PTR_NULL;
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;
if (kdbp->kd_list_head.raw == KDS_PTR_NULL)
kdbp->kd_list_head = kdsp;
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);
}
#endif
void
kernel_debug_internal(
uint32_t debugid,
uintptr_t arg1,
uintptr_t arg2,
uintptr_t arg3,
uintptr_t arg4,
uintptr_t arg5,
int entropy_flag);
__attribute__((always_inline)) void
kernel_debug_internal(
uint32_t debugid,
uintptr_t arg1,
uintptr_t arg2,
uintptr_t arg3,
uintptr_t arg4,
uintptr_t arg5,
int entropy_flag)
{
struct proc *curproc;
uint64_t now;
uint32_t bindx;
boolean_t s;
kd_buf *kd;
int cpu;
struct kd_bufinfo *kdbp;
struct kd_storage *kdsp_actual;
if (kd_ctrl_page.kdebug_slowcheck) {
if (kdebug_enable & KDEBUG_ENABLE_CHUD) {
kd_chudhook_fn chudhook;
/*
* Mask interrupts to minimize the interval across
* which the driver providing the hook could be
* unloaded.
*/
s = ml_set_interrupts_enabled(FALSE);
chudhook = kdebug_chudhook;
if (chudhook)
chudhook(debugid, arg1, arg2, arg3, arg4, arg5);
ml_set_interrupts_enabled(s);
}
if ((kdebug_enable & KDEBUG_ENABLE_ENTROPY) && entropy_flag) {
now = mach_absolute_time();
s = ml_set_interrupts_enabled(FALSE);
lck_spin_lock(kds_spin_lock);
if (kdebug_enable & KDEBUG_ENABLE_ENTROPY) {
if (kd_entropy_indx < kd_entropy_count) {
kd_entropy_buffer[kd_entropy_indx] = now;
kd_entropy_indx++;
}
if (kd_entropy_indx == kd_entropy_count) {
/*
* Disable entropy collection
*/
kdebug_enable &= ~KDEBUG_ENABLE_ENTROPY;
kd_ctrl_page.kdebug_slowcheck &= ~SLOW_ENTROPY;
}
}
lck_spin_unlock(kds_spin_lock);
ml_set_interrupts_enabled(s);
}
if ( (kd_ctrl_page.kdebug_slowcheck & SLOW_NOLOG) || !(kdebug_enable & KDEBUG_ENABLE_TRACE))
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)))
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)))
goto out1;
}
}
if (kd_ctrl_page.kdebug_flags & KDBG_RANGECHECK) {
if ((debugid < kdlog_beg)
|| ((debugid >= kdlog_end) && (debugid >> 24 != DBG_TRACE)))
goto out1;
}
else if (kd_ctrl_page.kdebug_flags & KDBG_VALCHECK) {
if ((debugid & DBG_FUNC_MASK) != kdlog_value1 &&
(debugid & DBG_FUNC_MASK) != kdlog_value2 &&
(debugid & DBG_FUNC_MASK) != kdlog_value3 &&
(debugid & DBG_FUNC_MASK) != kdlog_value4 &&
(debugid >> 24 != DBG_TRACE))
goto out1;
}
}
disable_preemption();
cpu = cpu_number();
kdbp = &kdbip[cpu];
retry_q:
if (kdbp->kd_list_tail.raw != KDS_PTR_NULL) {
kdsp_actual = POINTER_FROM_KDS_PTR(kdbp->kd_list_tail);
bindx = kdsp_actual->kds_bufindx;
} else
kdsp_actual = NULL;
if (kdsp_actual == NULL || bindx >= EVENTS_PER_STORAGE_UNIT) {
if (allocate_storage_unit(cpu) == FALSE) {
/*
* this can only happen if wrapping
* has been disabled
*/
goto out;
}
goto retry_q;
}
now = mach_absolute_time() & KDBG_TIMESTAMP_MASK;
if ( !OSCompareAndSwap(bindx, bindx + 1, &kdsp_actual->kds_bufindx))
goto retry_q;
kd = &kdsp_actual->kds_records[bindx];
kd->debugid = debugid;
kd->arg1 = arg1;
kd->arg2 = arg2;
kd->arg3 = arg3;
kd->arg4 = arg4;
kd->arg5 = arg5;
kdbg_set_timestamp_and_cpu(kd, now, cpu);
OSAddAtomic(1, &kdsp_actual->kds_bufcnt);
out:
enable_preemption();
out1:
if ((kds_waiter && kd_ctrl_page.kds_inuse_count >= n_storage_threshold) ||
(kde_waiter && kd_entropy_indx >= kd_entropy_count)) {
uint32_t etype;
uint32_t stype;
etype = debugid & DBG_FUNC_MASK;
stype = debugid & DBG_SCALL_MASK;
if (etype == INTERRUPT || etype == MACH_vmfault ||
stype == BSC_SysCall || stype == MACH_SysCall) {
boolean_t need_kds_wakeup = FALSE;
boolean_t need_kde_wakeup = FALSE;
/*
* try to take the lock here to synchronize with the
* waiter entering the blocked state... use the try
* mode to prevent deadlocks caused by re-entering this
* routine due to various trace points triggered in the
* lck_spin_sleep_xxxx routines used to actually enter
* one of our 2 wait conditions... no problem if we fail,
* there will be lots of additional events coming in that
* will eventually succeed in grabbing this lock
*/
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) {
kds_waiter = 0;
need_kds_wakeup = TRUE;
}
if (kde_waiter && kd_entropy_indx >= kd_entropy_count) {
kde_waiter = 0;
need_kde_wakeup = TRUE;
}
lck_spin_unlock(kdw_spin_lock);
}
ml_set_interrupts_enabled(s);
if (need_kds_wakeup == TRUE)
wakeup(&kds_waiter);
if (need_kde_wakeup == TRUE)
wakeup(&kde_waiter);
}
}
}
void
kernel_debug(
uint32_t debugid,
uintptr_t arg1,
uintptr_t arg2,
uintptr_t arg3,
uintptr_t arg4,
__unused uintptr_t arg5)
{
kernel_debug_internal(debugid, arg1, arg2, arg3, arg4, (uintptr_t)thread_tid(current_thread()), 1);
}
void
kernel_debug1(
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, 1);
}
/*
* Support syscall SYS_kdebug_trace
*/
int
kdebug_trace(__unused struct proc *p, struct kdebug_trace_args *uap, __unused int32_t *retval)
{
if ( __probable(kdebug_enable == 0) )
return(EINVAL);
kernel_debug_internal(uap->code, uap->arg1, uap->arg2, uap->arg3, uap->arg4, (uintptr_t)thread_tid(current_thread()), 0);
return(0);
}
static void
kdbg_lock_init(void)
{
if (kd_ctrl_page.kdebug_flags & KDBG_LOCKINIT)
return;
trace_handler_map_ctrl_page((uintptr_t)&kd_ctrl_page, sizeof(kd_ctrl_page), sizeof(struct kd_storage), sizeof(union kds_ptr));
/*
* allocate lock group attribute and group
*/
kd_trace_mtx_sysctl_grp_attr = lck_grp_attr_alloc_init();
kd_trace_mtx_sysctl_grp = lck_grp_alloc_init("kdebug", kd_trace_mtx_sysctl_grp_attr);
/*
* allocate the lock attribute
*/
kd_trace_mtx_sysctl_attr = lck_attr_alloc_init();
/*
* allocate and initialize mutex's
*/
kd_trace_mtx_sysctl = lck_mtx_alloc_init(kd_trace_mtx_sysctl_grp, kd_trace_mtx_sysctl_attr);
kds_spin_lock = lck_spin_alloc_init(kd_trace_mtx_sysctl_grp, kd_trace_mtx_sysctl_attr);
kdw_spin_lock = lck_spin_alloc_init(kd_trace_mtx_sysctl_grp, kd_trace_mtx_sysctl_attr);
kd_ctrl_page.kdebug_flags |= KDBG_LOCKINIT;
}
int
kdbg_bootstrap(boolean_t early_trace)
{
kd_ctrl_page.kdebug_flags &= ~KDBG_WRAPPED;
return (create_buffers(early_trace));
}
int
kdbg_reinit(boolean_t early_trace)
{
int ret = 0;
/*
* Disable trace collecting
* First make sure we're not in
* the middle of cutting a trace
*/
kdbg_set_tracing_enabled(FALSE);
/*
* make sure the SLOW_NOLOG is seen
* by everyone that might be trying
* to cut a trace..
*/
IOSleep(100);
delete_buffers();
if ((kd_ctrl_page.kdebug_flags & KDBG_MAPINIT) && kd_mapsize && kd_mapptr) {
kmem_free(kernel_map, (vm_offset_t)kd_mapptr, kd_mapsize);
kd_ctrl_page.kdebug_flags &= ~KDBG_MAPINIT;
kd_mapsize = 0;
kd_mapptr = (kd_threadmap *) 0;
kd_mapcount = 0;
}
ret = kdbg_bootstrap(early_trace);
RAW_file_offset = 0;
RAW_file_written = 0;
return(ret);
}
void
kdbg_trace_data(struct proc *proc, long *arg_pid)
{
if (!proc)
*arg_pid = 0;
else
*arg_pid = proc->p_pid;
}
void
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;
*arg3 = 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];
}
static void
kdbg_resolve_map(thread_t th_act, void *opaque)
{
kd_threadmap *mapptr;
krt_t *t = (krt_t *)opaque;
if (t->count < t->maxcount) {
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));
/*
* Some kernel threads have no associated pid.
* We still need to mark the entry as valid.
*/
if (t->atts->pid)
mapptr->valid = t->atts->pid;
else
mapptr->valid = 1;
t->count++;
}
}
void
kdbg_mapinit(void)
{
struct proc *p;
struct krt akrt;
int tts_count; /* number of task-to-string structures */
struct tts *tts_mapptr;
unsigned int tts_mapsize = 0;
vm_offset_t tts_maptomem=0;
int i;
if (kd_ctrl_page.kdebug_flags & KDBG_MAPINIT)
return;
/*
* need to use PROC_SCANPROCLIST with proc_iterate
*/
proc_list_lock();
/*
* Calculate the sizes of map buffers
*/
for (p = allproc.lh_first, kd_mapcount=0, tts_count=0; p; p = p->p_list.le_next) {
kd_mapcount += get_task_numacts((task_t)p->task);
tts_count++;
}
proc_list_unlock();
/*
* 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
* making into the tables. Bump up by 10%.
*/
kd_mapcount += kd_mapcount/10;
tts_count += tts_count/10;
kd_mapsize = kd_mapcount * sizeof(kd_threadmap);
if ((kmem_alloc(kernel_map, & kd_maptomem, (vm_size_t)kd_mapsize) == KERN_SUCCESS)) {
kd_mapptr = (kd_threadmap *) kd_maptomem;
bzero(kd_mapptr, kd_mapsize);
} else
kd_mapptr = (kd_threadmap *) 0;
tts_mapsize = tts_count * sizeof(struct tts);
if ((kmem_alloc(kernel_map, & tts_maptomem, (vm_size_t)tts_mapsize) == KERN_SUCCESS)) {
tts_mapptr = (struct tts *) tts_maptomem;
bzero(tts_mapptr, tts_mapsize);
} else
tts_mapptr = (struct tts *) 0;
/*
* We need to save the procs command string
* and take a reference for each task associated
* with a valid process
*/
if (tts_mapptr) {
/*
* should use proc_iterate
*/
proc_list_lock();
for (p = allproc.lh_first, i=0; p && i < tts_count; p = p->p_list.le_next) {
if (p->p_lflag & P_LEXIT)
continue;
if (p->task) {
task_reference(p->task);
tts_mapptr[i].task = p->task;
tts_mapptr[i].pid = p->p_pid;
(void)strlcpy(tts_mapptr[i].task_comm, p->p_comm, sizeof(tts_mapptr[i].task_comm));
i++;
}
}
tts_count = i;
proc_list_unlock();
}
if (kd_mapptr && tts_mapptr) {
kd_ctrl_page.kdebug_flags |= KDBG_MAPINIT;
/*
* Initialize thread map data
*/
akrt.map = kd_mapptr;
akrt.count = 0;
akrt.maxcount = kd_mapcount;
for (i = 0; i < tts_count; i++) {
akrt.atts = &tts_mapptr[i];
task_act_iterate_wth_args(tts_mapptr[i].task, kdbg_resolve_map, &akrt);
task_deallocate((task_t) tts_mapptr[i].task);
}
kmem_free(kernel_map, (vm_offset_t)tts_mapptr, tts_mapsize);
}
}
static void
kdbg_clear(void)
{
/*
* Clean up the trace buffer
* First make sure we're not in
* the middle of cutting a trace
*/
kdbg_set_tracing_enabled(FALSE);
/*
* make sure the SLOW_NOLOG is seen
* by everyone that might be trying
* to cut a trace..
*/
IOSleep(100);
global_state_pid = -1;
kd_ctrl_page.kdebug_flags &= (unsigned int)~KDBG_CKTYPES;
kd_ctrl_page.kdebug_flags &= ~(KDBG_NOWRAP | KDBG_RANGECHECK | KDBG_VALCHECK);
kd_ctrl_page.kdebug_flags &= ~(KDBG_PIDCHECK | KDBG_PIDEXCLUDE);
delete_buffers();
/* Clean up the thread map buffer */
kd_ctrl_page.kdebug_flags &= ~KDBG_MAPINIT;
if (kd_mapptr) {
kmem_free(kernel_map, (vm_offset_t)kd_mapptr, kd_mapsize);
kd_mapptr = (kd_threadmap *) 0;
}
kd_mapsize = 0;
kd_mapcount = 0;
RAW_file_offset = 0;
RAW_file_written = 0;
}
int
kdbg_setpid(kd_regtype *kdr)
{
pid_t pid;
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)
ret = ESRCH;
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);
p->p_kdebug = 1;
} else {
/*
* turn off pid check for this pid value
* Don't turn off all pid checking though
*
* kd_ctrl_page.kdebug_flags &= ~KDBG_PIDCHECK;
*/
p->p_kdebug = 0;
}
proc_rele(p);
}
}
else
ret = EINVAL;
return(ret);
}
/* This is for pid exclusion in the trace buffer */
int
kdbg_setpidex(kd_regtype *kdr)
{
pid_t pid;
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)
ret = ESRCH;
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);
p->p_kdebug = 1;
}
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
ret = EINVAL;
return(ret);
}
/*
* This is for setting a maximum decrementer value
*/
int
kdbg_setrtcdec(kd_regtype *kdr)
{
int ret = 0;
natural_t decval;
decval = (natural_t)kdr->value1;
if (decval && decval < KDBG_MINRTCDEC)
ret = EINVAL;
else
ret = ENOTSUP;
return(ret);
}
int
kdbg_setreg(kd_regtype * kdr)
{
int ret=0;
unsigned int val_1, val_2, val;
switch (kdr->type) {
case KDBG_CLASSTYPE :
val_1 = (kdr->value1 & 0xff);
val_2 = (kdr->value2 & 0xff);
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);
break;
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));
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);
break;
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);
break;
case KDBG_VALCHECK:
kdlog_value1 = (kdr->value1);
kdlog_value2 = (kdr->value2);
kdlog_value3 = (kdr->value3);
kdlog_value4 = (kdr->value4);
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);
break;
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_set_flags(SLOW_CHECKS, 0, TRUE);
else
kdbg_set_flags(SLOW_CHECKS, 0, FALSE);
kdlog_beg = 0;
kdlog_end = 0;
break;
default :
ret = EINVAL;
break;
}
return(ret);
}
int
kdbg_getreg(__unused kd_regtype * kdr)
{
#if 0
int i,j, ret=0;
unsigned int val_1, val_2, val;
switch (kdr->type) {
case KDBG_CLASSTYPE :
val_1 = (kdr->value1 & 0xff);
val_2 = val_1 + 1;
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_RANGECHECK | KDBG_CLASSTYPE);
break;
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));
kd_ctrl_page.kdebug_flags &= (unsigned int)~KDBG_CKTYPES;
kd_ctrl_page.kdebug_flags |= (KDBG_RANGECHECK | KDBG_SUBCLSTYPE);
break;
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_RANGECHECK | KDBG_RANGETYPE);
break;
case KDBG_TYPENONE :
kd_ctrl_page.kdebug_flags &= (unsigned int)~KDBG_CKTYPES;
kdlog_beg = 0;
kdlog_end = 0;
break;
default :
ret = EINVAL;
break;
}
#endif /* 0 */
return(EINVAL);
}
int
kdbg_readmap(user_addr_t buffer, size_t *number, vnode_t vp, vfs_context_t ctx)
{
int avail = *number;
int ret = 0;
uint32_t count = 0;
count = avail/sizeof (kd_threadmap);
if (count && (count <= kd_mapcount))
{
if ((kd_ctrl_page.kdebug_flags & KDBG_MAPINIT) && kd_mapsize && kd_mapptr)
{
if (*number < kd_mapsize)
ret = EINVAL;
else
{
if (vp)
{
RAW_header header;
clock_sec_t secs;
clock_usec_t usecs;
char *pad_buf;
int pad_size;
header.version_no = RAW_VERSION1;
header.thread_count = count;
clock_get_calendar_microtime(&secs, &usecs);
header.TOD_secs = secs;
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));
if (ret)
goto write_error;
RAW_file_offset += sizeof(RAW_header);
ret = vn_rdwr(UIO_WRITE, vp, (caddr_t)kd_mapptr, kd_mapsize, RAW_file_offset,
UIO_SYSSPACE, IO_NODELOCKED|IO_UNIT, vfs_context_ucred(ctx), (int *) 0, vfs_context_proc(ctx));
if (ret)
goto write_error;
RAW_file_offset += kd_mapsize;
pad_size = PAGE_SIZE - (RAW_file_offset & PAGE_MASK_64);
if (pad_size)
{
pad_buf = (char *)kalloc(pad_size);
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));
kfree(pad_buf, pad_size);
if (ret)
goto write_error;
RAW_file_offset += pad_size;
}
RAW_file_written += sizeof(RAW_header) + kd_mapsize + pad_size;
} else {
if (copyout(kd_mapptr, buffer, kd_mapsize))
ret = EINVAL;
}
}
}
else
ret = EINVAL;
}
else
ret = EINVAL;
if (ret && vp)
{
count = 0;
vn_rdwr(UIO_WRITE, vp, (caddr_t)&count, sizeof(uint32_t), RAW_file_offset,
UIO_SYSSPACE, IO_NODELOCKED|IO_UNIT, vfs_context_ucred(ctx), (int *) 0, vfs_context_proc(ctx));
RAW_file_offset += sizeof(uint32_t);
RAW_file_written += sizeof(uint32_t);
}
write_error:
if ((kd_ctrl_page.kdebug_flags & KDBG_MAPINIT) && kd_mapsize && kd_mapptr)
{
kmem_free(kernel_map, (vm_offset_t)kd_mapptr, kd_mapsize);
kd_ctrl_page.kdebug_flags &= ~KDBG_MAPINIT;
kd_mapsize = 0;
kd_mapptr = (kd_threadmap *) 0;
kd_mapcount = 0;
}
return(ret);
}
int
kdbg_getentropy (user_addr_t buffer, size_t *number, int ms_timeout)
{
int avail = *number;
int ret = 0;
int s;
u_int64_t abstime;
u_int64_t ns;
int wait_result = THREAD_AWAKENED;
if (kd_entropy_buffer)
return(EBUSY);
if (ms_timeout < 0)
return(EINVAL);
kd_entropy_count = avail/sizeof(uint64_t);
if (kd_entropy_count > MAX_ENTROPY_COUNT || kd_entropy_count == 0) {
/*
* Enforce maximum entropy entries
*/
return(EINVAL);
}
kd_entropy_bufsize = kd_entropy_count * sizeof(uint64_t);
/*
* allocate entropy buffer
*/
if (kmem_alloc(kernel_map, &kd_entropy_buftomem, (vm_size_t)kd_entropy_bufsize) == KERN_SUCCESS) {
kd_entropy_buffer = (uint64_t *) kd_entropy_buftomem;
} else {
kd_entropy_buffer = (uint64_t *) 0;
kd_entropy_count = 0;
return (ENOMEM);
}
kd_entropy_indx = 0;
KERNEL_DEBUG_CONSTANT(0xbbbbf000 | DBG_FUNC_START, ms_timeout, kd_entropy_count, 0, 0, 0);
/*
* Enable entropy sampling
*/
kdbg_set_flags(SLOW_ENTROPY, KDEBUG_ENABLE_ENTROPY, TRUE);
if (ms_timeout) {
ns = (u_int64_t)ms_timeout * (u_int64_t)(1000 * 1000);
nanoseconds_to_absolutetime(ns, &abstime );
clock_absolutetime_interval_to_deadline( abstime, &abstime );
} else
abstime = 0;
s = ml_set_interrupts_enabled(FALSE);
lck_spin_lock(kdw_spin_lock);
while (wait_result == THREAD_AWAKENED && kd_entropy_indx < kd_entropy_count) {
kde_waiter = 1;
if (abstime) {
/*
* wait for the specified timeout or
* until we've hit our sample limit
*/
wait_result = lck_spin_sleep_deadline(kdw_spin_lock, 0, &kde_waiter, THREAD_ABORTSAFE, abstime);
} else {
/*
* wait until we've hit our sample limit
*/
wait_result = lck_spin_sleep(kdw_spin_lock, 0, &kde_waiter, THREAD_ABORTSAFE);
}
kde_waiter = 0;
}
lck_spin_unlock(kdw_spin_lock);
ml_set_interrupts_enabled(s);
/*
* Disable entropy sampling
*/
kdbg_set_flags(SLOW_ENTROPY, KDEBUG_ENABLE_ENTROPY, FALSE);
KERNEL_DEBUG_CONSTANT(0xbbbbf000 | DBG_FUNC_END, ms_timeout, kd_entropy_indx, 0, 0, 0);
*number = 0;
ret = 0;
if (kd_entropy_indx > 0) {
/*
* copyout the buffer
*/
if (copyout(kd_entropy_buffer, buffer, kd_entropy_indx * sizeof(uint64_t)))
ret = EINVAL;
else
*number = kd_entropy_indx * sizeof(uint64_t);
}
/*
* Always cleanup
*/
kd_entropy_count = 0;
kd_entropy_indx = 0;
kd_entropy_buftomem = 0;
kmem_free(kernel_map, (vm_offset_t)kd_entropy_buffer, kd_entropy_bufsize);
kd_entropy_buffer = (uint64_t *) 0;
return(ret);
}
static void
kdbg_set_nkdbufs(unsigned int value)
{
/*
* 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
*/
unsigned int max_entries = (sane_size/2) / sizeof(kd_buf);
if (value <= max_entries)
nkdbufs = value;
else
nkdbufs = max_entries;
}
/*
* This function is provided for the CHUD toolkit only.
* int val:
* zero disables kdebug_chudhook function call
* non-zero enables kdebug_chudhook function call
* char *fn:
* address of the enabled kdebug_chudhook function
*/
void
kdbg_control_chud(int val, void *fn)
{
kdbg_lock_init();
if (val) {
/* enable chudhook */
kdebug_chudhook = fn;
kdbg_set_flags(SLOW_CHUD, KDEBUG_ENABLE_CHUD, TRUE);
}
else {
/* disable chudhook */
kdbg_set_flags(SLOW_CHUD, KDEBUG_ENABLE_CHUD, FALSE);
kdebug_chudhook = 0;
}
}
int
kdbg_control(int *name, u_int namelen, user_addr_t where, size_t *sizep)
{
int ret = 0;
size_t size = *sizep;
unsigned int value = 0;
kd_regtype kd_Reg;
kbufinfo_t kd_bufinfo;
pid_t curpid;
proc_t p, curproc;
if (name[0] == KERN_KDGETENTROPY ||
name[0] == KERN_KDWRITETR ||
name[0] == KERN_KDWRITEMAP ||
name[0] == KERN_KDEFLAGS ||
name[0] == KERN_KDDFLAGS ||
name[0] == KERN_KDENABLE ||
name[0] == KERN_KDSETBUF) {
if ( namelen < 2 )
return(EINVAL);
value = name[1];
}
kdbg_lock_init();
if ( !(kd_ctrl_page.kdebug_flags & KDBG_LOCKINIT))
return(ENOSPC);
lck_mtx_lock(kd_trace_mtx_sysctl);
if (name[0] == KERN_KDGETBUF) {
/*
* Does not alter the global_state_pid
* This is a passive request.
*/
if (size < sizeof(kd_bufinfo.nkdbufs)) {
/*
* There is not enough room to return even
* the first element of the info structure.
*/
ret = EINVAL;
goto out;
}
kd_bufinfo.nkdbufs = nkdbufs;
kd_bufinfo.nkdthreads = kd_mapsize / sizeof(kd_threadmap);
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;
#if defined(__LP64__)
kd_bufinfo.flags |= KDBG_LP64;
#endif
kd_bufinfo.bufid = global_state_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;
}
goto out;
} else if (name[0] == KERN_KDGETENTROPY) {
if (kd_entropy_buffer)
ret = EBUSY;
else
ret = kdbg_getentropy(where, sizep, value);
goto out;
}
if ((curproc = current_proc()) != NULL)
curpid = curproc->p_pid;
else {
ret = ESRCH;
goto out;
}
if (global_state_pid == -1)
global_state_pid = curpid;
else if (global_state_pid != curpid) {
if ((p = proc_find(global_state_pid)) == NULL) {
/*
* The global pid no longer exists
*/
global_state_pid = curpid;
} else {
/*
* The global pid exists, deny this request
*/
proc_rele(p);
ret = EBUSY;
goto out;
}
}
switch(name[0]) {
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_KDENABLE:
/*
* used to enable or disable
*/
if (value) {
/*
* enable only if buffer is initialized
*/
if (!(kd_ctrl_page.kdebug_flags & KDBG_BUFINIT)) {
ret = EINVAL;
break;
}
kdbg_mapinit();
kdbg_set_tracing_enabled(TRUE);
}
else
kdbg_set_tracing_enabled(FALSE);
break;
case KERN_KDSETBUF:
kdbg_set_nkdbufs(value);
break;
case KERN_KDSETUP:
ret = kdbg_reinit(FALSE);
break;
case KERN_KDREMOVE:
kdbg_clear();
break;
case KERN_KDSETREG:
if(size < sizeof(kd_regtype)) {
ret = EINVAL;
break;
}
if (copyin(where, &kd_Reg, sizeof(kd_regtype))) {
ret = EINVAL;
break;
}
ret = kdbg_setreg(&kd_Reg);
break;
case KERN_KDGETREG:
if (size < sizeof(kd_regtype)) {
ret = EINVAL;
break;
}
ret = kdbg_getreg(&kd_Reg);
if (copyout(&kd_Reg, where, sizeof(kd_regtype))) {
ret = EINVAL;
}
break;
case KERN_KDREADTR:
ret = kdbg_read(where, sizep, NULL, NULL);
break;
case KERN_KDWRITETR:
case KERN_KDWRITEMAP:
{
struct vfs_context context;
struct fileproc *fp;
size_t number;
vnode_t vp;
int fd;
if (name[0] == KERN_KDWRITETR) {
int s;
int wait_result = THREAD_AWAKENED;
u_int64_t abstime;
u_int64_t ns;
if (*sizep) {
ns = ((u_int64_t)*sizep) * (u_int64_t)(1000 * 1000);
nanoseconds_to_absolutetime(ns, &abstime );
clock_absolutetime_interval_to_deadline( abstime, &abstime );
} else
abstime = 0;
s = ml_set_interrupts_enabled(FALSE);
lck_spin_lock(kdw_spin_lock);
while (wait_result == THREAD_AWAKENED && kd_ctrl_page.kds_inuse_count < n_storage_threshold) {
kds_waiter = 1;
if (abstime)
wait_result = lck_spin_sleep_deadline(kdw_spin_lock, 0, &kds_waiter, THREAD_ABORTSAFE, abstime);
else
wait_result = lck_spin_sleep(kdw_spin_lock, 0, &kds_waiter, THREAD_ABORTSAFE);
kds_waiter = 0;
}
lck_spin_unlock(kdw_spin_lock);
ml_set_interrupts_enabled(s);
}
p = current_proc();
fd = value;
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;
if (fp->f_fglob->fg_type != DTYPE_VNODE) {
fp_drop(p, fd, fp, 1);
proc_fdunlock(p);
ret = EBADF;
break;
}
vp = (struct vnode *)fp->f_fglob->fg_data;
proc_fdunlock(p);
if ((ret = vnode_getwithref(vp)) == 0) {
if (name[0] == KERN_KDWRITETR) {
number = nkdbufs * sizeof(kd_buf);
KERNEL_DEBUG_CONSTANT((TRACEDBG_CODE(DBG_TRACE_INFO, 3)) | DBG_FUNC_START, 0, 0, 0, 0, 0);
ret = kdbg_read(0, &number, vp, &context);
KERNEL_DEBUG_CONSTANT((TRACEDBG_CODE(DBG_TRACE_INFO, 3)) | DBG_FUNC_END, number, 0, 0, 0, 0);
*sizep = number;
} else {
number = kd_mapsize;
kdbg_readmap(0, &number, vp, &context);
}
vnode_put(vp);
}
fp_drop(p, fd, fp, 0);
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;
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);
break;
case KERN_KDTHRMAP:
ret = kdbg_readmap(where, sizep, NULL, NULL);
break;
case KERN_KDSETRTCDEC:
if (size < sizeof(kd_regtype)) {
ret = EINVAL;
break;
}
if (copyin(where, &kd_Reg, sizeof(kd_regtype))) {
ret = EINVAL;
break;
}
ret = kdbg_setrtcdec(&kd_Reg);
break;
default:
ret = EINVAL;
}
out:
lck_mtx_unlock(kd_trace_mtx_sysctl);
return(ret);
}
/*
* This code can run for the most part concurrently with kernel_debug_internal()...
* 'release_storage_unit' will take the kds_spin_lock which may cause us to briefly
* synchronize with the recording side of this puzzle... otherwise, we are able to
* move through the lists w/o use of any locks
*/
int
kdbg_read(user_addr_t buffer, size_t *number, vnode_t vp, vfs_context_t ctx)
{
unsigned int count;
unsigned int cpu, min_cpu;
uint64_t mintime, t;
int error = 0;
kd_buf *tempbuf;
uint32_t rcursor;
kd_buf lostevent;
union kds_ptr kdsp;
struct kd_storage *kdsp_actual;
struct kd_bufinfo *kdbp;
struct kd_bufinfo *min_kdbp;
uint32_t tempbuf_count;
uint32_t tempbuf_number;
uint32_t old_kdebug_flags;
uint32_t old_kdebug_slowcheck;
boolean_t lostevents = FALSE;
boolean_t out_of_events = FALSE;
count = *number/sizeof(kd_buf);
*number = 0;
if (count == 0 || !(kd_ctrl_page.kdebug_flags & KDBG_BUFINIT) || kdcopybuf == 0)
return EINVAL;
memset(&lostevent, 0, sizeof(lostevent));
lostevent.debugid = TRACEDBG_CODE(DBG_TRACE_INFO, 2);
/*
* because we hold kd_trace_mtx_sysctl, no other control threads can
* be playing with kdebug_flags... the code that cuts new events could
* be running, but it grabs kds_spin_lock if it needs to acquire a new
* storage chunk which is where it examines kdebug_flags... it its adding
* to the same chunk we're reading from, no problem...
*/
disable_wrap(&old_kdebug_slowcheck, &old_kdebug_flags);
if (count > nkdbufs)
count = nkdbufs;
if ((tempbuf_count = count) > KDCOPYBUF_COUNT)
tempbuf_count = KDCOPYBUF_COUNT;
while (count) {
tempbuf = kdcopybuf;
tempbuf_number = 0;
while (tempbuf_count) {
mintime = 0xffffffffffffffffULL;
min_kdbp = NULL;
min_cpu = 0;
for (cpu = 0, kdbp = &kdbip[0]; cpu < kd_cpus; cpu++, kdbp++) {
if ((kdsp = kdbp->kd_list_head).raw == KDS_PTR_NULL)
continue;
kdsp_actual = POINTER_FROM_KDS_PTR(kdsp);
rcursor = kdsp_actual->kds_readlast;
if (rcursor == kdsp_actual->kds_bufindx)
continue;
t = kdbg_get_timestamp(&kdsp_actual->kds_records[rcursor]);
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;
}
if (t < mintime) {
mintime = t;
min_kdbp = kdbp;
min_cpu = cpu;
}
}
if (min_kdbp == NULL || out_of_events == TRUE) {
/*
* all buffers ran empty
*/
out_of_events = TRUE;
break;
}
kdsp = min_kdbp->kd_list_head;
kdsp_actual = POINTER_FROM_KDS_PTR(kdsp);
if (kdsp_actual->kds_lostevents == TRUE) {
lostevent.timestamp = kdsp_actual->kds_records[kdsp_actual->kds_readlast].timestamp;
*tempbuf = lostevent;
kdsp_actual->kds_lostevents = FALSE;
lostevents = TRUE;
goto nextevent;
}
*tempbuf = kdsp_actual->kds_records[kdsp_actual->kds_readlast++];
if (kdsp_actual->kds_readlast == EVENTS_PER_STORAGE_UNIT)
release_storage_unit(min_cpu, kdsp.raw);
/*
* Watch for out of order timestamps
*/
if (mintime < min_kdbp->kd_prev_timebase) {
/*
* if so, use the previous timestamp + 1 cycle
*/
min_kdbp->kd_prev_timebase++;
kdbg_set_timestamp_and_cpu(tempbuf, min_kdbp->kd_prev_timebase, kdbg_get_cpu(tempbuf));
} else
min_kdbp->kd_prev_timebase = mintime;
nextevent:
tempbuf_count--;
tempbuf_number++;
tempbuf++;
if ((RAW_file_written += sizeof(kd_buf)) >= RAW_FLUSH_SIZE)
break;
}
if (tempbuf_number) {
if (vp) {
error = vn_rdwr(UIO_WRITE, vp, (caddr_t)kdcopybuf, tempbuf_number * sizeof(kd_buf), RAW_file_offset,
UIO_SYSSPACE, IO_NODELOCKED|IO_UNIT, vfs_context_ucred(ctx), (int *) 0, vfs_context_proc(ctx));
RAW_file_offset += (tempbuf_number * sizeof(kd_buf));
if (RAW_file_written >= RAW_FLUSH_SIZE) {
cluster_push(vp, 0);
RAW_file_written = 0;
}
} else {
error = copyout(kdcopybuf, buffer, tempbuf_number * sizeof(kd_buf));
buffer += (tempbuf_number * sizeof(kd_buf));
}
if (error) {
*number = 0;
error = EINVAL;
break;
}
count -= tempbuf_number;
*number += tempbuf_number;
}
if (out_of_events == TRUE)
/*
* all trace buffers are empty
*/
break;
if ((tempbuf_count = count) > KDCOPYBUF_COUNT)
tempbuf_count = KDCOPYBUF_COUNT;
}
if ( !(old_kdebug_flags & KDBG_NOWRAP)) {
enable_wrap(old_kdebug_slowcheck, lostevents);
}
return (error);
}
unsigned char *getProcName(struct proc *proc);
unsigned char *getProcName(struct proc *proc) {
return (unsigned char *) &proc->p_comm; /* Return pointer to the proc name */
}
#define STACKSHOT_SUBSYS_LOCK() lck_mtx_lock(&stackshot_subsys_mutex)
#define STACKSHOT_SUBSYS_UNLOCK() lck_mtx_unlock(&stackshot_subsys_mutex)
#if defined(__i386__) || defined (__x86_64__)
#define TRAP_DEBUGGER __asm__ volatile("int3");
#endif
#define SANE_TRACEBUF_SIZE (8 * 1024 * 1024)
/* Initialize the mutex governing access to the stack snapshot subsystem */
__private_extern__ void
stackshot_lock_init( void )
{
stackshot_subsys_lck_grp_attr = lck_grp_attr_alloc_init();
stackshot_subsys_lck_grp = lck_grp_alloc_init("stackshot_subsys_lock", stackshot_subsys_lck_grp_attr);
stackshot_subsys_lck_attr = lck_attr_alloc_init();
lck_mtx_init(&stackshot_subsys_mutex, stackshot_subsys_lck_grp, stackshot_subsys_lck_attr);
}
/*
* stack_snapshot: Obtains a coherent set of stack traces for all threads
* on the system, tracing both kernel and user stacks
* where available. Uses machine specific trace routines
* for ppc, ppc64 and x86.
* Inputs: uap->pid - process id of process to be traced, or -1
* for the entire system
* uap->tracebuf - address of the user space destination
* buffer
* uap->tracebuf_size - size of the user space trace buffer
* uap->options - various options, including the maximum
* number of frames to trace.
* Outputs: EPERM if the caller is not privileged
* EINVAL if the supplied trace buffer isn't sanely sized
* ENOMEM if we don't have enough memory to satisfy the
* request
* ENOENT if the target pid isn't found
* ENOSPC if the supplied buffer is insufficient
* *retval contains the number of bytes traced, if successful
* and -1 otherwise. If the request failed due to
* tracebuffer exhaustion, we copyout as much as possible.
*/
int
stack_snapshot(struct proc *p, register struct stack_snapshot_args *uap, int32_t *retval) {
int error = 0;
if ((error = suser(kauth_cred_get(), &p->p_acflag)))
return(error);
return stack_snapshot2(uap->pid, uap->tracebuf, uap->tracebuf_size,
uap->flags, uap->dispatch_offset, retval);
}
int
stack_snapshot2(pid_t pid, user_addr_t tracebuf, uint32_t tracebuf_size, uint32_t flags, uint32_t dispatch_offset, int32_t *retval)
{
int error = 0;
unsigned bytesTraced = 0;
boolean_t istate;
*retval = -1;
/* Serialize tracing */
STACKSHOT_SUBSYS_LOCK();
if ((tracebuf_size <= 0) || (tracebuf_size > SANE_TRACEBUF_SIZE)) {
error = EINVAL;
goto error_exit;
}
assert(stackshot_snapbuf == NULL);
if (kmem_alloc_kobject(kernel_map, (vm_offset_t *)&stackshot_snapbuf, tracebuf_size) != KERN_SUCCESS) {
error = ENOMEM;
goto error_exit;
}
if (panic_active()) {
error = ENOMEM;
goto error_exit;
}
istate = ml_set_interrupts_enabled(FALSE);
/* Preload trace parameters*/
kdp_snapshot_preflight(pid, stackshot_snapbuf, tracebuf_size, flags, dispatch_offset);
/* Trap to the debugger to obtain a coherent stack snapshot; this populates
* the trace buffer
*/
TRAP_DEBUGGER;
ml_set_interrupts_enabled(istate);
bytesTraced = kdp_stack_snapshot_bytes_traced();
if (bytesTraced > 0) {
if ((error = copyout(stackshot_snapbuf, tracebuf,
((bytesTraced < tracebuf_size) ?
bytesTraced : tracebuf_size))))
goto error_exit;
*retval = bytesTraced;
}
else {
error = ENOENT;
goto error_exit;
}
error = kdp_stack_snapshot_geterror();
if (error == -1) {
error = ENOSPC;
*retval = -1;
goto error_exit;
}
error_exit:
if (stackshot_snapbuf != NULL)
kmem_free(kernel_map, (vm_offset_t) stackshot_snapbuf, tracebuf_size);
stackshot_snapbuf = NULL;
STACKSHOT_SUBSYS_UNLOCK();
return error;
}
void
start_kern_tracing(unsigned int new_nkdbufs) {
if (!new_nkdbufs)
return;
kdbg_set_nkdbufs(new_nkdbufs);
kdbg_lock_init();
kdbg_reinit(TRUE);
kdbg_set_tracing_enabled(TRUE);
#if defined(__i386__) || defined(__x86_64__)
uint64_t now = mach_absolute_time();
KERNEL_DEBUG_CONSTANT((TRACEDBG_CODE(DBG_TRACE_INFO, 1)) | DBG_FUNC_NONE,
(uint32_t)(tsc_rebase_abs_time >> 32), (uint32_t)tsc_rebase_abs_time,
(uint32_t)(now >> 32), (uint32_t)now,
0);
#endif
printf("kernel tracing started\n");
}
void
kdbg_dump_trace_to_file(const char *filename)
{
vfs_context_t ctx;
vnode_t vp;
int error;
size_t number;
if ( !(kdebug_enable & KDEBUG_ENABLE_TRACE))
return;
if (global_state_pid != -1) {
if ((proc_find(global_state_pid)) != NULL) {
/*
* The global pid exists, we're running
* due to fs_usage, latency, etc...
* don't cut the panic/shutdown trace file
*/
return;
}
}
KERNEL_DEBUG_CONSTANT((TRACEDBG_CODE(DBG_TRACE_INFO, 0)) | DBG_FUNC_NONE, 0, 0, 0, 0, 0);
kdebug_enable = 0;
kd_ctrl_page.enabled = 0;
ctx = vfs_context_kernel();
if ((error = vnode_open(filename, (O_CREAT | FWRITE | O_NOFOLLOW), 0600, 0, &vp, ctx)))
return;
number = kd_mapsize;
kdbg_readmap(0, &number, vp, ctx);
number = nkdbufs*sizeof(kd_buf);
kdbg_read(0, &number, vp, ctx);
vnode_close(vp, FWRITE, ctx);
sync(current_proc(), (void *)NULL, (int *)NULL);
}
/* 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)
{
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);
}
#if defined(NATIVE_TRACE_FACILITY)
void trace_handler_map_ctrl_page(__unused uintptr_t addr, __unused size_t ctrl_page_size, __unused size_t storage_size, __unused size_t kds_ptr_size)
{
}
void trace_handler_map_bufinfo(__unused uintptr_t addr, __unused size_t size)
{
}
void trace_handler_unmap_bufinfo(void)
{
}
void trace_handler_map_buffer(__unused int index, __unused uintptr_t addr, __unused size_t size)
{
}
void trace_handler_unmap_buffer(__unused int index)
{
}
#endif