#include <mach/mach_types.h>
#include <mach/boolean.h>
#include <mach/policy.h>
#include <mach/thread_info.h>
#include <mach/thread_special_ports.h>
#include <mach/thread_status.h>
#include <mach/time_value.h>
#include <mach/vm_param.h>
#include <machine/thread.h>
#include <machine/pal_routines.h>
#include <machine/limits.h>
#include <kern/kern_types.h>
#include <kern/kalloc.h>
#include <kern/cpu_data.h>
#include <kern/counters.h>
#include <kern/extmod_statistics.h>
#include <kern/ipc_mig.h>
#include <kern/ipc_tt.h>
#include <kern/mach_param.h>
#include <kern/machine.h>
#include <kern/misc_protos.h>
#include <kern/processor.h>
#include <kern/queue.h>
#include <kern/sched.h>
#include <kern/sched_prim.h>
#include <kern/sync_lock.h>
#include <kern/syscall_subr.h>
#include <kern/task.h>
#include <kern/thread.h>
#include <kern/thread_group.h>
#include <kern/coalition.h>
#include <kern/host.h>
#include <kern/zalloc.h>
#include <kern/assert.h>
#include <kern/exc_resource.h>
#include <kern/exc_guard.h>
#include <kern/telemetry.h>
#include <kern/policy_internal.h>
#include <corpses/task_corpse.h>
#if KPC
#include <kern/kpc.h>
#endif
#if MONOTONIC
#include <kern/monotonic.h>
#include <machine/monotonic.h>
#endif
#include <ipc/ipc_kmsg.h>
#include <ipc/ipc_port.h>
#include <bank/bank_types.h>
#include <vm/vm_kern.h>
#include <vm/vm_pageout.h>
#include <sys/kdebug.h>
#include <sys/bsdtask_info.h>
#include <mach/sdt.h>
#include <san/kasan.h>
#include <stdatomic.h>
#include <mach/task_server.h>
#include <mach/thread_act_server.h>
#include <mach/mach_host_server.h>
#include <mach/host_priv_server.h>
#include <mach/mach_voucher_server.h>
#include <kern/policy_internal.h>
static struct zone *thread_zone;
static lck_grp_attr_t thread_lck_grp_attr;
lck_attr_t thread_lck_attr;
lck_grp_t thread_lck_grp;
struct zone *thread_qos_override_zone;
decl_simple_lock_data(static,thread_stack_lock)
static queue_head_t thread_stack_queue;
decl_simple_lock_data(static,thread_terminate_lock)
static queue_head_t thread_terminate_queue;
static queue_head_t crashed_threads_queue;
decl_simple_lock_data(static,thread_exception_lock)
static queue_head_t thread_exception_queue;
struct thread_exception_elt {
queue_chain_t elt;
exception_type_t exception_type;
task_t exception_task;
thread_t exception_thread;
};
static struct thread thread_template, init_thread;
static void sched_call_null(
int type,
thread_t thread);
#ifdef MACH_BSD
extern void proc_exit(void *);
extern mach_exception_data_type_t proc_encode_exit_exception_code(void *);
extern uint64_t get_dispatchqueue_offset_from_proc(void *);
extern uint64_t get_return_to_kernel_offset_from_proc(void *p);
extern int proc_selfpid(void);
extern char * proc_name_address(void *p);
#endif
extern int disable_exc_resource;
extern int audio_active;
extern int debug_task;
int thread_max = CONFIG_THREAD_MAX;
int task_threadmax = CONFIG_THREAD_MAX;
static uint64_t thread_unique_id = 100;
struct _thread_ledger_indices thread_ledgers = { -1 };
static ledger_template_t thread_ledger_template = NULL;
static void init_thread_ledgers(void);
#if CONFIG_JETSAM
void jetsam_on_ledger_cpulimit_exceeded(void);
#endif
#define CPUMON_USTACKSHOTS_TRIGGER_DEFAULT_PCT 70
int cpumon_ustackshots_trigger_pct;
void __attribute__((noinline)) SENDING_NOTIFICATION__THIS_THREAD_IS_CONSUMING_TOO_MUCH_CPU(void);
#define MINIMUM_CPULIMIT_INTERVAL_MS 1
void
thread_bootstrap(void)
{
#if MACH_ASSERT
thread_template.thread_magic = THREAD_MAGIC;
#endif
thread_template.runq = PROCESSOR_NULL;
thread_template.ref_count = 2;
thread_template.reason = AST_NONE;
thread_template.at_safe_point = FALSE;
thread_template.wait_event = NO_EVENT64;
thread_template.waitq = NULL;
thread_template.wait_result = THREAD_WAITING;
thread_template.options = THREAD_ABORTSAFE;
thread_template.state = TH_WAIT | TH_UNINT;
thread_template.wake_active = FALSE;
thread_template.continuation = THREAD_CONTINUE_NULL;
thread_template.parameter = NULL;
thread_template.importance = 0;
thread_template.sched_mode = TH_MODE_NONE;
thread_template.sched_flags = 0;
thread_template.saved_mode = TH_MODE_NONE;
thread_template.safe_release = 0;
thread_template.th_sched_bucket = TH_BUCKET_RUN;
thread_template.sfi_class = SFI_CLASS_UNSPECIFIED;
thread_template.sfi_wait_class = SFI_CLASS_UNSPECIFIED;
thread_template.active = 0;
thread_template.started = 0;
thread_template.static_param = 0;
thread_template.policy_reset = 0;
thread_template.base_pri = BASEPRI_DEFAULT;
thread_template.sched_pri = 0;
thread_template.max_priority = 0;
thread_template.task_priority = 0;
thread_template.promotions = 0;
thread_template.pending_promoter_index = 0;
thread_template.pending_promoter[0] = NULL;
thread_template.pending_promoter[1] = NULL;
thread_template.rwlock_count = 0;
thread_template.realtime.deadline = UINT64_MAX;
thread_template.quantum_remaining = 0;
thread_template.last_run_time = 0;
thread_template.last_made_runnable_time = THREAD_NOT_RUNNABLE;
thread_template.last_basepri_change_time = THREAD_NOT_RUNNABLE;
thread_template.same_pri_latency = 0;
thread_template.computation_metered = 0;
thread_template.computation_epoch = 0;
#if defined(CONFIG_SCHED_TIMESHARE_CORE)
thread_template.sched_stamp = 0;
thread_template.pri_shift = INT8_MAX;
thread_template.sched_usage = 0;
thread_template.cpu_usage = thread_template.cpu_delta = 0;
#endif
thread_template.c_switch = thread_template.p_switch = thread_template.ps_switch = 0;
#if MONOTONIC
memset(&thread_template.t_monotonic, 0,
sizeof(thread_template.t_monotonic));
#endif
thread_template.bound_processor = PROCESSOR_NULL;
thread_template.last_processor = PROCESSOR_NULL;
thread_template.sched_call = sched_call_null;
timer_init(&thread_template.user_timer);
timer_init(&thread_template.system_timer);
timer_init(&thread_template.ptime);
thread_template.user_timer_save = 0;
thread_template.system_timer_save = 0;
thread_template.vtimer_user_save = 0;
thread_template.vtimer_prof_save = 0;
thread_template.vtimer_rlim_save = 0;
thread_template.vtimer_qos_save = 0;
#if CONFIG_SCHED_SFI
thread_template.wait_sfi_begin_time = 0;
#endif
thread_template.wait_timer_is_set = FALSE;
thread_template.wait_timer_active = 0;
thread_template.depress_timer_active = 0;
thread_template.recover = (vm_offset_t)NULL;
thread_template.map = VM_MAP_NULL;
#if CONFIG_DTRACE
thread_template.t_dtrace_predcache = 0;
thread_template.t_dtrace_vtime = 0;
thread_template.t_dtrace_tracing = 0;
#endif
#if KPERF
thread_template.kperf_flags = 0;
thread_template.kperf_pet_gen = 0;
thread_template.kperf_c_switch = 0;
thread_template.kperf_pet_cnt = 0;
#endif
#if KPC
thread_template.kpc_buf = NULL;
#endif
#if HYPERVISOR
thread_template.hv_thread_target = NULL;
#endif
#if (DEVELOPMENT || DEBUG)
thread_template.t_page_creation_throttled_hard = 0;
thread_template.t_page_creation_throttled_soft = 0;
#endif
thread_template.t_page_creation_throttled = 0;
thread_template.t_page_creation_count = 0;
thread_template.t_page_creation_time = 0;
thread_template.affinity_set = NULL;
thread_template.syscalls_unix = 0;
thread_template.syscalls_mach = 0;
thread_template.t_ledger = LEDGER_NULL;
thread_template.t_threadledger = LEDGER_NULL;
thread_template.t_bankledger = LEDGER_NULL;
thread_template.t_deduct_bank_ledger_time = 0;
thread_template.requested_policy = (struct thread_requested_policy) {};
thread_template.effective_policy = (struct thread_effective_policy) {};
bzero(&thread_template.overrides, sizeof(thread_template.overrides));
thread_template.sync_ipc_overrides = 0;
thread_template.iotier_override = THROTTLE_LEVEL_NONE;
thread_template.thread_io_stats = NULL;
#if CONFIG_EMBEDDED
thread_template.taskwatch = NULL;
#endif
thread_template.thread_callout_interrupt_wakeups = thread_template.thread_callout_platform_idle_wakeups = 0;
thread_template.thread_timer_wakeups_bin_1 = thread_template.thread_timer_wakeups_bin_2 = 0;
thread_template.callout_woken_from_icontext = thread_template.callout_woken_from_platform_idle = 0;
thread_template.thread_tag = 0;
thread_template.ith_voucher_name = MACH_PORT_NULL;
thread_template.ith_voucher = IPC_VOUCHER_NULL;
thread_template.th_work_interval = NULL;
init_thread = thread_template;
machine_set_current_thread(&init_thread);
}
extern boolean_t allow_qos_policy_set;
void
thread_init(void)
{
thread_zone = zinit(
sizeof(struct thread),
thread_max * sizeof(struct thread),
THREAD_CHUNK * sizeof(struct thread),
"threads");
thread_qos_override_zone = zinit(
sizeof(struct thread_qos_override),
4 * thread_max * sizeof(struct thread_qos_override),
PAGE_SIZE,
"thread qos override");
zone_change(thread_qos_override_zone, Z_EXPAND, TRUE);
zone_change(thread_qos_override_zone, Z_COLLECT, TRUE);
zone_change(thread_qos_override_zone, Z_CALLERACCT, FALSE);
zone_change(thread_qos_override_zone, Z_NOENCRYPT, TRUE);
lck_grp_attr_setdefault(&thread_lck_grp_attr);
lck_grp_init(&thread_lck_grp, "thread", &thread_lck_grp_attr);
lck_attr_setdefault(&thread_lck_attr);
stack_init();
thread_policy_init();
machine_thread_init();
if (!PE_parse_boot_argn("cpumon_ustackshots_trigger_pct", &cpumon_ustackshots_trigger_pct,
sizeof (cpumon_ustackshots_trigger_pct))) {
cpumon_ustackshots_trigger_pct = CPUMON_USTACKSHOTS_TRIGGER_DEFAULT_PCT;
}
PE_parse_boot_argn("-qos-policy-allow", &allow_qos_policy_set, sizeof(allow_qos_policy_set));
init_thread_ledgers();
}
boolean_t
thread_is_active(thread_t thread)
{
return (thread->active);
}
void
thread_corpse_continue(void)
{
thread_t thread = current_thread();
thread_terminate_internal(thread);
assert(thread->active == FALSE);
thread_ast_clear(thread, AST_APC);
thread_apc_ast(thread);
panic("thread_corpse_continue");
}
static void
thread_terminate_continue(void)
{
panic("thread_terminate_continue");
}
void
thread_terminate_self(void)
{
thread_t thread = current_thread();
task_t task;
spl_t s;
int threadcnt;
pal_thread_terminate_self(thread);
DTRACE_PROC(lwp__exit);
thread_mtx_lock(thread);
ipc_thread_disable(thread);
thread_mtx_unlock(thread);
s = splsched();
thread_lock(thread);
if (thread->sched_flags & TH_SFLAG_DEPRESSED_MASK) {
thread->sched_flags &= ~TH_SFLAG_DEPRESSED_MASK;
thread_recompute_sched_pri(thread, FALSE);
if (timer_call_cancel(&thread->depress_timer))
thread->depress_timer_active--;
}
while (thread->depress_timer_active > 0) {
thread_unlock(thread);
splx(s);
delay(1);
s = splsched();
thread_lock(thread);
}
thread_sched_call(thread, NULL);
thread_unlock(thread);
splx(s);
#if CONFIG_EMBEDDED
thead_remove_taskwatch(thread);
#endif
work_interval_thread_terminate(thread);
thread_mtx_lock(thread);
thread_policy_reset(thread);
thread_mtx_unlock(thread);
bank_swap_thread_bank_ledger(thread, NULL);
task = thread->task;
uthread_cleanup(task, thread->uthread, task->bsd_info);
if (task->bsd_info && !task_is_exec_copy(task)) {
long dbg_arg1 = 0;
long dbg_arg2 = 0;
kdbg_trace_data(thread->task->bsd_info, &dbg_arg1, &dbg_arg2);
KERNEL_DEBUG_CONSTANT(TRACE_DATA_THREAD_TERMINATE_PID | DBG_FUNC_NONE,
dbg_arg1, 0, 0, 0, 0);
}
threadcnt = hw_atomic_sub(&task->active_thread_count, 1);
if (threadcnt == 0 && task->bsd_info != NULL && !task_is_exec_copy(task)) {
mach_exception_data_type_t subcode = 0;
{
long dbg_arg1 = 0, dbg_arg2 = 0, dbg_arg3 = 0, dbg_arg4 = 0;
kdbg_trace_string(thread->task->bsd_info, &dbg_arg1, &dbg_arg2, &dbg_arg3, &dbg_arg4);
KERNEL_DEBUG_CONSTANT(TRACE_STRING_PROC_EXIT | DBG_FUNC_NONE,
dbg_arg1, dbg_arg2, dbg_arg3, dbg_arg4, 0);
}
subcode = proc_encode_exit_exception_code(task->bsd_info);
proc_exit(task->bsd_info);
if (task->corpse_info) {
task_deliver_crash_notification(task, current_thread(), EXC_RESOURCE, subcode);
}
}
if (threadcnt == 0) {
task_lock(task);
if (task_is_a_corpse_fork(task)) {
thread_wakeup((event_t)&task->active_thread_count);
}
task_unlock(task);
}
uthread_cred_free(thread->uthread);
s = splsched();
thread_lock(thread);
if (thread->wait_timer_is_set) {
thread->wait_timer_is_set = FALSE;
if (timer_call_cancel(&thread->wait_timer))
thread->wait_timer_active--;
}
while (thread->wait_timer_active > 0) {
thread_unlock(thread);
splx(s);
delay(1);
s = splsched();
thread_lock(thread);
}
if (thread->reserved_stack != 0) {
stack_free_reserved(thread);
thread->reserved_stack = 0;
}
thread->state |= TH_TERMINATE;
thread_mark_wait_locked(thread, THREAD_UNINT);
assert((thread->sched_flags & TH_SFLAG_PROMOTED) == 0);
assert(thread->promotions == 0);
assert(!(thread->sched_flags & TH_SFLAG_WAITQ_PROMOTED));
assert(thread->rwlock_count == 0);
thread_unlock(thread);
thread_block((thread_continue_t)thread_terminate_continue);
}
void
thread_deallocate_safe(thread_t thread)
{
assert_thread_magic(thread);
uint32_t old_refcount = atomic_fetch_sub_explicit(&thread->ref_count, 1, memory_order_release);
if (__improbable(old_refcount <= 1))
panic("bad thread refcount: %d", old_refcount);
}
void
thread_deallocate(
thread_t thread)
{
task_t task;
__assert_only uint32_t th_ref_count;
if (thread == THREAD_NULL)
return;
assert_thread_magic(thread);
if (__probable(atomic_fetch_sub_explicit(&thread->ref_count, 1,
memory_order_release) - 1 > 0)) {
return;
}
th_ref_count = atomic_load_explicit(&thread->ref_count, memory_order_acquire);
assert(th_ref_count == 0);
assert(thread_owned_workloops_count(thread) == 0);
if (!(thread->state & TH_TERMINATE2))
panic("thread_deallocate: thread not properly terminated\n");
assert(thread->runq == PROCESSOR_NULL);
assert(thread->user_promotions == 0);
#if KPC
kpc_thread_destroy(thread);
#endif
ipc_thread_terminate(thread);
proc_thread_qos_deallocate(thread);
task = thread->task;
#ifdef MACH_BSD
{
void *ut = thread->uthread;
thread->uthread = NULL;
uthread_zone_free(ut);
}
#endif
if (thread->t_ledger)
ledger_dereference(thread->t_ledger);
if (thread->t_threadledger)
ledger_dereference(thread->t_threadledger);
if (IPC_VOUCHER_NULL != thread->ith_voucher)
ipc_voucher_release(thread->ith_voucher);
if (thread->thread_io_stats)
kfree(thread->thread_io_stats, sizeof(struct io_stat_info));
if (thread->kernel_stack != 0)
stack_free(thread);
lck_mtx_destroy(&thread->mutex, &thread_lck_grp);
machine_thread_destroy(thread);
task_deallocate(task);
#if MACH_ASSERT
assert_thread_magic(thread);
thread->thread_magic = 0;
#endif
zfree(thread_zone, thread);
}
void
thread_starts_owning_workloop(thread_t thread)
{
atomic_fetch_add_explicit(&thread->kqwl_owning_count, 1,
memory_order_relaxed);
}
void
thread_ends_owning_workloop(thread_t thread)
{
__assert_only uint32_t count;
count = atomic_fetch_sub_explicit(&thread->kqwl_owning_count, 1,
memory_order_relaxed);
assert(count > 0);
}
uint32_t
thread_owned_workloops_count(thread_t thread)
{
return atomic_load_explicit(&thread->kqwl_owning_count,
memory_order_relaxed);
}
void
thread_inspect_deallocate(
thread_inspect_t thread_inspect)
{
return(thread_deallocate((thread_t)thread_inspect));
}
static void
thread_exception_daemon(void)
{
struct thread_exception_elt *elt;
task_t task;
thread_t thread;
exception_type_t etype;
simple_lock(&thread_exception_lock);
while ((elt = (struct thread_exception_elt *)dequeue_head(&thread_exception_queue)) != NULL) {
simple_unlock(&thread_exception_lock);
etype = elt->exception_type;
task = elt->exception_task;
thread = elt->exception_thread;
assert_thread_magic(thread);
kfree(elt, sizeof (*elt));
task_lock(task);
task_wait_till_threads_terminate_locked(task);
task_unlock(task);
task_deallocate(task);
thread_deallocate(thread);
task_deliver_crash_notification(task, thread, etype, 0);
simple_lock(&thread_exception_lock);
}
assert_wait((event_t)&thread_exception_queue, THREAD_UNINT);
simple_unlock(&thread_exception_lock);
thread_block((thread_continue_t)thread_exception_daemon);
}
void
thread_exception_enqueue(
task_t task,
thread_t thread,
exception_type_t etype)
{
assert(EXC_RESOURCE == etype || EXC_GUARD == etype);
struct thread_exception_elt *elt = kalloc(sizeof (*elt));
elt->exception_type = etype;
elt->exception_task = task;
elt->exception_thread = thread;
simple_lock(&thread_exception_lock);
enqueue_tail(&thread_exception_queue, (queue_entry_t)elt);
simple_unlock(&thread_exception_lock);
thread_wakeup((event_t)&thread_exception_queue);
}
void
thread_copy_resource_info(
thread_t dst_thread,
thread_t src_thread)
{
dst_thread->thread_tag = src_thread->thread_tag;
dst_thread->c_switch = src_thread->c_switch;
dst_thread->p_switch = src_thread->p_switch;
dst_thread->ps_switch = src_thread->ps_switch;
dst_thread->precise_user_kernel_time = src_thread->precise_user_kernel_time;
dst_thread->user_timer = src_thread->user_timer;
dst_thread->user_timer_save = src_thread->user_timer_save;
dst_thread->system_timer = src_thread->system_timer;
dst_thread->system_timer_save = src_thread->system_timer_save;
dst_thread->vtimer_user_save = src_thread->vtimer_user_save;
dst_thread->vtimer_prof_save = src_thread->vtimer_prof_save;
dst_thread->vtimer_rlim_save = src_thread->vtimer_rlim_save;
dst_thread->vtimer_qos_save = src_thread->vtimer_qos_save;
dst_thread->syscalls_unix = src_thread->syscalls_unix;
dst_thread->syscalls_mach = src_thread->syscalls_mach;
ledger_rollup(dst_thread->t_threadledger, src_thread->t_threadledger);
*dst_thread->thread_io_stats = *src_thread->thread_io_stats;
}
static void
thread_terminate_daemon(void)
{
thread_t self, thread;
task_t task;
self = current_thread();
self->options |= TH_OPT_SYSTEM_CRITICAL;
(void)splsched();
simple_lock(&thread_terminate_lock);
while ((thread = qe_dequeue_head(&thread_terminate_queue, struct thread, runq_links)) != THREAD_NULL) {
assert_thread_magic(thread);
if (thread->inspection){
enqueue_tail(&crashed_threads_queue, &thread->runq_links);
continue;
}
simple_unlock(&thread_terminate_lock);
(void)spllo();
task = thread->task;
task_lock(task);
task->total_user_time += timer_grab(&thread->user_timer);
task->total_ptime += timer_grab(&thread->ptime);
if (thread->precise_user_kernel_time) {
task->total_system_time += timer_grab(&thread->system_timer);
} else {
task->total_user_time += timer_grab(&thread->system_timer);
}
task->c_switch += thread->c_switch;
task->p_switch += thread->p_switch;
task->ps_switch += thread->ps_switch;
task->syscalls_unix += thread->syscalls_unix;
task->syscalls_mach += thread->syscalls_mach;
task->task_timer_wakeups_bin_1 += thread->thread_timer_wakeups_bin_1;
task->task_timer_wakeups_bin_2 += thread->thread_timer_wakeups_bin_2;
task->task_gpu_ns += ml_gpu_stat(thread);
task->task_energy += ml_energy_stat(thread);
#if MONOTONIC
mt_terminate_update(task, thread);
#endif
thread_update_qos_cpu_time(thread);
queue_remove(&task->threads, thread, thread_t, task_threads);
task->thread_count--;
if (task->thread_count == 1 && task->halting)
thread_wakeup((event_t)&task->halting);
task_unlock(task);
lck_mtx_lock(&tasks_threads_lock);
queue_remove(&threads, thread, thread_t, threads);
threads_count--;
lck_mtx_unlock(&tasks_threads_lock);
thread_deallocate(thread);
(void)splsched();
simple_lock(&thread_terminate_lock);
}
assert_wait((event_t)&thread_terminate_queue, THREAD_UNINT);
simple_unlock(&thread_terminate_lock);
self->options &= ~TH_OPT_SYSTEM_CRITICAL;
thread_block((thread_continue_t)thread_terminate_daemon);
}
void
thread_terminate_enqueue(
thread_t thread)
{
KERNEL_DEBUG_CONSTANT(TRACE_DATA_THREAD_TERMINATE | DBG_FUNC_NONE, thread->thread_id, 0, 0, 0, 0);
simple_lock(&thread_terminate_lock);
enqueue_tail(&thread_terminate_queue, &thread->runq_links);
simple_unlock(&thread_terminate_lock);
thread_wakeup((event_t)&thread_terminate_queue);
}
void
thread_terminate_crashed_threads()
{
thread_t th_remove;
boolean_t should_wake_terminate_queue = FALSE;
simple_lock(&thread_terminate_lock);
qe_foreach_element_safe(th_remove, &crashed_threads_queue, runq_links) {
assert(th_remove != current_thread());
if (th_remove->inspection == FALSE) {
re_queue_tail(&thread_terminate_queue, &th_remove->runq_links);
should_wake_terminate_queue = TRUE;
}
}
simple_unlock(&thread_terminate_lock);
if (should_wake_terminate_queue == TRUE) {
thread_wakeup((event_t)&thread_terminate_queue);
}
}
static void
thread_stack_daemon(void)
{
thread_t thread;
spl_t s;
s = splsched();
simple_lock(&thread_stack_lock);
while ((thread = qe_dequeue_head(&thread_stack_queue, struct thread, runq_links)) != THREAD_NULL) {
assert_thread_magic(thread);
simple_unlock(&thread_stack_lock);
splx(s);
stack_alloc(thread);
KERNEL_DEBUG_CONSTANT(MACHDBG_CODE(DBG_MACH_SCHED,MACH_STACK_WAIT) | DBG_FUNC_END, thread_tid(thread), 0, 0, 0, 0);
s = splsched();
thread_lock(thread);
thread_setrun(thread, SCHED_PREEMPT | SCHED_TAILQ);
thread_unlock(thread);
simple_lock(&thread_stack_lock);
}
assert_wait((event_t)&thread_stack_queue, THREAD_UNINT);
simple_unlock(&thread_stack_lock);
splx(s);
thread_block((thread_continue_t)thread_stack_daemon);
}
void
thread_stack_enqueue(
thread_t thread)
{
KERNEL_DEBUG_CONSTANT(MACHDBG_CODE(DBG_MACH_SCHED,MACH_STACK_WAIT) | DBG_FUNC_START, thread_tid(thread), 0, 0, 0, 0);
assert_thread_magic(thread);
simple_lock(&thread_stack_lock);
enqueue_tail(&thread_stack_queue, &thread->runq_links);
simple_unlock(&thread_stack_lock);
thread_wakeup((event_t)&thread_stack_queue);
}
void
thread_daemon_init(void)
{
kern_return_t result;
thread_t thread = NULL;
simple_lock_init(&thread_terminate_lock, 0);
queue_init(&thread_terminate_queue);
queue_init(&crashed_threads_queue);
result = kernel_thread_start_priority((thread_continue_t)thread_terminate_daemon, NULL, MINPRI_KERNEL, &thread);
if (result != KERN_SUCCESS)
panic("thread_daemon_init: thread_terminate_daemon");
thread_deallocate(thread);
simple_lock_init(&thread_stack_lock, 0);
queue_init(&thread_stack_queue);
result = kernel_thread_start_priority((thread_continue_t)thread_stack_daemon, NULL, BASEPRI_PREEMPT_HIGH, &thread);
if (result != KERN_SUCCESS)
panic("thread_daemon_init: thread_stack_daemon");
thread_deallocate(thread);
simple_lock_init(&thread_exception_lock, 0);
queue_init(&thread_exception_queue);
result = kernel_thread_start_priority((thread_continue_t)thread_exception_daemon, NULL, MINPRI_KERNEL, &thread);
if (result != KERN_SUCCESS)
panic("thread_daemon_init: thread_exception_daemon");
thread_deallocate(thread);
}
#define TH_OPTION_NONE 0x00
#define TH_OPTION_NOCRED 0x01
#define TH_OPTION_NOSUSP 0x02
static kern_return_t
thread_create_internal(
task_t parent_task,
integer_t priority,
thread_continue_t continuation,
int options,
thread_t *out_thread)
{
thread_t new_thread;
static thread_t first_thread;
if (first_thread == THREAD_NULL)
new_thread = first_thread = current_thread();
else
new_thread = (thread_t)zalloc(thread_zone);
if (new_thread == THREAD_NULL)
return (KERN_RESOURCE_SHORTAGE);
if (new_thread != first_thread)
*new_thread = thread_template;
#ifdef MACH_BSD
new_thread->uthread = uthread_alloc(parent_task, new_thread, (options & TH_OPTION_NOCRED) != 0);
if (new_thread->uthread == NULL) {
#if MACH_ASSERT
new_thread->thread_magic = 0;
#endif
zfree(thread_zone, new_thread);
return (KERN_RESOURCE_SHORTAGE);
}
#endif
if (machine_thread_create(new_thread, parent_task) != KERN_SUCCESS) {
#ifdef MACH_BSD
void *ut = new_thread->uthread;
new_thread->uthread = NULL;
uthread_cleanup(parent_task, ut, parent_task->bsd_info);
uthread_cred_free(ut);
uthread_zone_free(ut);
#endif
#if MACH_ASSERT
new_thread->thread_magic = 0;
#endif
zfree(thread_zone, new_thread);
return (KERN_FAILURE);
}
new_thread->task = parent_task;
thread_lock_init(new_thread);
wake_lock_init(new_thread);
lck_mtx_init(&new_thread->mutex, &thread_lck_grp, &thread_lck_attr);
ipc_thread_init(new_thread);
new_thread->continuation = continuation;
new_thread->thread_io_stats = (io_stat_info_t)kalloc(sizeof(struct io_stat_info));
assert(new_thread->thread_io_stats != NULL);
bzero(new_thread->thread_io_stats, sizeof(struct io_stat_info));
new_thread->sync_ipc_overrides = 0;
#if KASAN
kasan_init_thread(&new_thread->kasan_data);
#endif
#if CONFIG_IOSCHED
new_thread->decmp_upl = NULL;
#endif
lck_mtx_lock(&tasks_threads_lock);
task_lock(parent_task);
if (parent_task->active == 0 || parent_task->halting ||
(parent_task->suspend_count > 0 && (options & TH_OPTION_NOSUSP) != 0) ||
(parent_task->thread_count >= task_threadmax && parent_task != kernel_task)) {
task_unlock(parent_task);
lck_mtx_unlock(&tasks_threads_lock);
#ifdef MACH_BSD
{
void *ut = new_thread->uthread;
new_thread->uthread = NULL;
uthread_cleanup(parent_task, ut, parent_task->bsd_info);
uthread_cred_free(ut);
uthread_zone_free(ut);
}
#endif
ipc_thread_disable(new_thread);
ipc_thread_terminate(new_thread);
kfree(new_thread->thread_io_stats, sizeof(struct io_stat_info));
lck_mtx_destroy(&new_thread->mutex, &thread_lck_grp);
machine_thread_destroy(new_thread);
zfree(thread_zone, new_thread);
return (KERN_FAILURE);
}
machine_thread_inherit_taskwide(new_thread, parent_task);
task_reference_internal(parent_task);
if (new_thread->task->rusage_cpu_flags & TASK_RUSECPU_FLAGS_PERTHR_LIMIT) {
act_set_astledger(new_thread);
}
if ((new_thread->t_threadledger = ledger_instantiate(thread_ledger_template,
LEDGER_CREATE_INACTIVE_ENTRIES)) != LEDGER_NULL) {
ledger_entry_setactive(new_thread->t_threadledger, thread_ledgers.cpu_time);
}
new_thread->t_bankledger = LEDGER_NULL;
new_thread->t_deduct_bank_ledger_time = 0;
new_thread->t_deduct_bank_ledger_energy = 0;
new_thread->t_ledger = new_thread->task->ledger;
if (new_thread->t_ledger)
ledger_reference(new_thread->t_ledger);
#if defined(CONFIG_SCHED_MULTIQ)
new_thread->sched_group = parent_task->sched_group;
#endif
new_thread->map = parent_task->map;
timer_call_setup(&new_thread->wait_timer, thread_timer_expire, new_thread);
timer_call_setup(&new_thread->depress_timer, thread_depress_expire, new_thread);
#if KPC
kpc_thread_create(new_thread);
#endif
new_thread->sched_mode = SCHED(initial_thread_sched_mode)(parent_task);
new_thread->max_priority = parent_task->max_priority;
new_thread->task_priority = parent_task->priority;
int new_priority = (priority < 0) ? parent_task->priority: priority;
new_priority = (priority < 0)? parent_task->priority: priority;
if (new_priority > new_thread->max_priority)
new_priority = new_thread->max_priority;
#if CONFIG_EMBEDDED
if (new_priority < MAXPRI_THROTTLE) {
new_priority = MAXPRI_THROTTLE;
}
#endif
new_thread->importance = new_priority - new_thread->task_priority;
sched_set_thread_base_priority(new_thread, new_priority);
#if defined(CONFIG_SCHED_TIMESHARE_CORE)
new_thread->sched_stamp = sched_tick;
new_thread->pri_shift = sched_pri_shifts[new_thread->th_sched_bucket];
#endif
#if CONFIG_EMBEDDED
if (parent_task->max_priority <= MAXPRI_THROTTLE)
sched_thread_mode_demote(new_thread, TH_SFLAG_THROTTLED);
#endif
thread_policy_create(new_thread);
queue_enter(&parent_task->threads, new_thread, thread_t, task_threads);
parent_task->thread_count++;
hw_atomic_add(&parent_task->active_thread_count, 1);
new_thread->thread_id = ++thread_unique_id;
queue_enter(&threads, new_thread, thread_t, threads);
threads_count++;
new_thread->active = TRUE;
if (task_is_a_corpse_fork(parent_task)) {
new_thread->inspection = TRUE;
} else {
new_thread->inspection = FALSE;
}
new_thread->corpse_dup = FALSE;
*out_thread = new_thread;
{
long dbg_arg1, dbg_arg2, dbg_arg3, dbg_arg4;
kdbg_trace_data(parent_task->bsd_info, &dbg_arg2, &dbg_arg4);
dbg_arg3 = (task_is_exec_copy(parent_task)) ? TRUE : 0;
KERNEL_DEBUG_CONSTANT_IST(KDEBUG_TRACE,
TRACE_DATA_NEWTHREAD | DBG_FUNC_NONE,
(vm_address_t)(uintptr_t)thread_tid(new_thread), dbg_arg2, dbg_arg3, dbg_arg4, 0);
kdbg_trace_string(parent_task->bsd_info,
&dbg_arg1, &dbg_arg2, &dbg_arg3, &dbg_arg4);
KERNEL_DEBUG_CONSTANT_IST(KDEBUG_TRACE,
TRACE_STRING_NEWTHREAD | DBG_FUNC_NONE,
dbg_arg1, dbg_arg2, dbg_arg3, dbg_arg4, 0);
}
DTRACE_PROC1(lwp__create, thread_t, *out_thread);
return (KERN_SUCCESS);
}
static kern_return_t
thread_create_internal2(
task_t task,
thread_t *new_thread,
boolean_t from_user,
thread_continue_t continuation)
{
kern_return_t result;
thread_t thread;
if (task == TASK_NULL || task == kernel_task)
return (KERN_INVALID_ARGUMENT);
result = thread_create_internal(task, -1, continuation, TH_OPTION_NONE, &thread);
if (result != KERN_SUCCESS)
return (result);
thread->user_stop_count = 1;
thread_hold(thread);
if (task->suspend_count > 0)
thread_hold(thread);
if (from_user)
extmod_statistics_incr_thread_create(task);
task_unlock(task);
lck_mtx_unlock(&tasks_threads_lock);
*new_thread = thread;
return (KERN_SUCCESS);
}
kern_return_t
thread_create(
task_t task,
thread_t *new_thread);
kern_return_t
thread_create(
task_t task,
thread_t *new_thread)
{
return thread_create_internal2(task, new_thread, FALSE, (thread_continue_t)thread_bootstrap_return);
}
kern_return_t
thread_create_from_user(
task_t task,
thread_t *new_thread)
{
return thread_create_internal2(task, new_thread, TRUE, (thread_continue_t)thread_bootstrap_return);
}
kern_return_t
thread_create_with_continuation(
task_t task,
thread_t *new_thread,
thread_continue_t continuation)
{
return thread_create_internal2(task, new_thread, FALSE, continuation);
}
static kern_return_t
thread_create_waiting_internal(
task_t task,
thread_continue_t continuation,
event_t event,
int options,
thread_t *new_thread)
{
kern_return_t result;
thread_t thread;
if (task == TASK_NULL || task == kernel_task)
return (KERN_INVALID_ARGUMENT);
result = thread_create_internal(task, -1, continuation, options, &thread);
if (result != KERN_SUCCESS)
return (result);
if (task->suspend_count > 0)
thread_hold(thread);
thread_mtx_lock(thread);
thread_start_in_assert_wait(thread, event, THREAD_INTERRUPTIBLE);
thread_mtx_unlock(thread);
task_unlock(task);
lck_mtx_unlock(&tasks_threads_lock);
*new_thread = thread;
return (KERN_SUCCESS);
}
kern_return_t
thread_create_waiting(
task_t task,
thread_continue_t continuation,
event_t event,
thread_t *new_thread)
{
return thread_create_waiting_internal(task, continuation, event,
TH_OPTION_NONE, new_thread);
}
static kern_return_t
thread_create_running_internal2(
task_t task,
int flavor,
thread_state_t new_state,
mach_msg_type_number_t new_state_count,
thread_t *new_thread,
boolean_t from_user)
{
kern_return_t result;
thread_t thread;
if (task == TASK_NULL || task == kernel_task)
return (KERN_INVALID_ARGUMENT);
result = thread_create_internal(task, -1, (thread_continue_t)thread_bootstrap_return, TH_OPTION_NONE, &thread);
if (result != KERN_SUCCESS)
return (result);
if (task->suspend_count > 0)
thread_hold(thread);
result = machine_thread_set_state(thread, flavor, new_state, new_state_count);
if (result != KERN_SUCCESS) {
task_unlock(task);
lck_mtx_unlock(&tasks_threads_lock);
thread_terminate(thread);
thread_deallocate(thread);
return (result);
}
thread_mtx_lock(thread);
thread_start(thread);
thread_mtx_unlock(thread);
if (from_user)
extmod_statistics_incr_thread_create(task);
task_unlock(task);
lck_mtx_unlock(&tasks_threads_lock);
*new_thread = thread;
return (result);
}
kern_return_t
thread_create_running(
task_t task,
int flavor,
thread_state_t new_state,
mach_msg_type_number_t new_state_count,
thread_t *new_thread);
kern_return_t
thread_create_running(
task_t task,
int flavor,
thread_state_t new_state,
mach_msg_type_number_t new_state_count,
thread_t *new_thread)
{
return thread_create_running_internal2(
task, flavor, new_state, new_state_count,
new_thread, FALSE);
}
kern_return_t
thread_create_running_from_user(
task_t task,
int flavor,
thread_state_t new_state,
mach_msg_type_number_t new_state_count,
thread_t *new_thread)
{
return thread_create_running_internal2(
task, flavor, new_state, new_state_count,
new_thread, TRUE);
}
kern_return_t
thread_create_workq(
task_t task,
thread_continue_t thread_return,
thread_t *new_thread)
{
kern_return_t result;
thread_t thread;
if (task == TASK_NULL || task == kernel_task)
return (KERN_INVALID_ARGUMENT);
result = thread_create_internal(task, -1, thread_return, TH_OPTION_NOCRED | TH_OPTION_NOSUSP, &thread);
if (result != KERN_SUCCESS)
return (result);
thread->user_stop_count = 1;
thread_hold(thread);
if (task->suspend_count > 0)
thread_hold(thread);
task_unlock(task);
lck_mtx_unlock(&tasks_threads_lock);
*new_thread = thread;
return (KERN_SUCCESS);
}
kern_return_t
thread_create_workq_waiting(
task_t task,
thread_continue_t continuation,
event_t event,
thread_t *new_thread)
{
return thread_create_waiting_internal(task, continuation, event,
TH_OPTION_NOCRED | TH_OPTION_NOSUSP,
new_thread);
}
kern_return_t
kernel_thread_create(
thread_continue_t continuation,
void *parameter,
integer_t priority,
thread_t *new_thread)
{
kern_return_t result;
thread_t thread;
task_t task = kernel_task;
result = thread_create_internal(task, priority, continuation, TH_OPTION_NOCRED | TH_OPTION_NONE, &thread);
if (result != KERN_SUCCESS)
return (result);
task_unlock(task);
lck_mtx_unlock(&tasks_threads_lock);
stack_alloc(thread);
assert(thread->kernel_stack != 0);
#if CONFIG_EMBEDDED
if (priority > BASEPRI_KERNEL)
#endif
thread->reserved_stack = thread->kernel_stack;
thread->parameter = parameter;
if(debug_task & 1)
kprintf("kernel_thread_create: thread = %p continuation = %p\n", thread, continuation);
*new_thread = thread;
return (result);
}
kern_return_t
kernel_thread_start_priority(
thread_continue_t continuation,
void *parameter,
integer_t priority,
thread_t *new_thread)
{
kern_return_t result;
thread_t thread;
result = kernel_thread_create(continuation, parameter, priority, &thread);
if (result != KERN_SUCCESS)
return (result);
*new_thread = thread;
thread_mtx_lock(thread);
thread_start(thread);
thread_mtx_unlock(thread);
return (result);
}
kern_return_t
kernel_thread_start(
thread_continue_t continuation,
void *parameter,
thread_t *new_thread)
{
return kernel_thread_start_priority(continuation, parameter, -1, new_thread);
}
static void
retrieve_thread_basic_info(thread_t thread, thread_basic_info_t basic_info)
{
int state, flags;
thread_read_times(thread, &basic_info->user_time,
&basic_info->system_time);
if (SCHED(can_update_priority)(thread))
SCHED(update_priority)(thread);
basic_info->sleep_time = 0;
basic_info->cpu_usage = 0;
#if defined(CONFIG_SCHED_TIMESHARE_CORE)
if (sched_tick_interval) {
basic_info->cpu_usage = (integer_t)(((uint64_t)thread->cpu_usage
* TH_USAGE_SCALE) / sched_tick_interval);
basic_info->cpu_usage = (basic_info->cpu_usage * 3) / 5;
}
#endif
if (basic_info->cpu_usage > TH_USAGE_SCALE)
basic_info->cpu_usage = TH_USAGE_SCALE;
basic_info->policy = ((thread->sched_mode == TH_MODE_TIMESHARE)?
POLICY_TIMESHARE: POLICY_RR);
flags = 0;
if (thread->options & TH_OPT_IDLE_THREAD)
flags |= TH_FLAGS_IDLE;
if (thread->options & TH_OPT_GLOBAL_FORCED_IDLE) {
flags |= TH_FLAGS_GLOBAL_FORCED_IDLE;
}
if (!thread->kernel_stack)
flags |= TH_FLAGS_SWAPPED;
state = 0;
if (thread->state & TH_TERMINATE)
state = TH_STATE_HALTED;
else
if (thread->state & TH_RUN)
state = TH_STATE_RUNNING;
else
if (thread->state & TH_UNINT)
state = TH_STATE_UNINTERRUPTIBLE;
else
if (thread->state & TH_SUSP)
state = TH_STATE_STOPPED;
else
if (thread->state & TH_WAIT)
state = TH_STATE_WAITING;
basic_info->run_state = state;
basic_info->flags = flags;
basic_info->suspend_count = thread->user_stop_count;
return;
}
kern_return_t
thread_info_internal(
thread_t thread,
thread_flavor_t flavor,
thread_info_t thread_info_out,
mach_msg_type_number_t *thread_info_count)
{
spl_t s;
if (thread == THREAD_NULL)
return (KERN_INVALID_ARGUMENT);
if (flavor == THREAD_BASIC_INFO) {
if (*thread_info_count < THREAD_BASIC_INFO_COUNT)
return (KERN_INVALID_ARGUMENT);
s = splsched();
thread_lock(thread);
retrieve_thread_basic_info(thread, (thread_basic_info_t) thread_info_out);
thread_unlock(thread);
splx(s);
*thread_info_count = THREAD_BASIC_INFO_COUNT;
return (KERN_SUCCESS);
}
else
if (flavor == THREAD_IDENTIFIER_INFO) {
thread_identifier_info_t identifier_info;
if (*thread_info_count < THREAD_IDENTIFIER_INFO_COUNT)
return (KERN_INVALID_ARGUMENT);
identifier_info = (thread_identifier_info_t) thread_info_out;
s = splsched();
thread_lock(thread);
identifier_info->thread_id = thread->thread_id;
identifier_info->thread_handle = thread->machine.cthread_self;
identifier_info->dispatch_qaddr = thread_dispatchqaddr(thread);
thread_unlock(thread);
splx(s);
return KERN_SUCCESS;
}
else
if (flavor == THREAD_SCHED_TIMESHARE_INFO) {
policy_timeshare_info_t ts_info;
if (*thread_info_count < POLICY_TIMESHARE_INFO_COUNT)
return (KERN_INVALID_ARGUMENT);
ts_info = (policy_timeshare_info_t)thread_info_out;
s = splsched();
thread_lock(thread);
if (thread->sched_mode != TH_MODE_TIMESHARE) {
thread_unlock(thread);
splx(s);
return (KERN_INVALID_POLICY);
}
ts_info->depressed = (thread->sched_flags & TH_SFLAG_DEPRESSED_MASK) != 0;
if (ts_info->depressed) {
ts_info->base_priority = DEPRESSPRI;
ts_info->depress_priority = thread->base_pri;
}
else {
ts_info->base_priority = thread->base_pri;
ts_info->depress_priority = -1;
}
ts_info->cur_priority = thread->sched_pri;
ts_info->max_priority = thread->max_priority;
thread_unlock(thread);
splx(s);
*thread_info_count = POLICY_TIMESHARE_INFO_COUNT;
return (KERN_SUCCESS);
}
else
if (flavor == THREAD_SCHED_FIFO_INFO) {
if (*thread_info_count < POLICY_FIFO_INFO_COUNT)
return (KERN_INVALID_ARGUMENT);
return (KERN_INVALID_POLICY);
}
else
if (flavor == THREAD_SCHED_RR_INFO) {
policy_rr_info_t rr_info;
uint32_t quantum_time;
uint64_t quantum_ns;
if (*thread_info_count < POLICY_RR_INFO_COUNT)
return (KERN_INVALID_ARGUMENT);
rr_info = (policy_rr_info_t) thread_info_out;
s = splsched();
thread_lock(thread);
if (thread->sched_mode == TH_MODE_TIMESHARE) {
thread_unlock(thread);
splx(s);
return (KERN_INVALID_POLICY);
}
rr_info->depressed = (thread->sched_flags & TH_SFLAG_DEPRESSED_MASK) != 0;
if (rr_info->depressed) {
rr_info->base_priority = DEPRESSPRI;
rr_info->depress_priority = thread->base_pri;
}
else {
rr_info->base_priority = thread->base_pri;
rr_info->depress_priority = -1;
}
quantum_time = SCHED(initial_quantum_size)(THREAD_NULL);
absolutetime_to_nanoseconds(quantum_time, &quantum_ns);
rr_info->max_priority = thread->max_priority;
rr_info->quantum = (uint32_t)(quantum_ns / 1000 / 1000);
thread_unlock(thread);
splx(s);
*thread_info_count = POLICY_RR_INFO_COUNT;
return (KERN_SUCCESS);
}
else
if (flavor == THREAD_EXTENDED_INFO) {
thread_basic_info_data_t basic_info;
thread_extended_info_t extended_info = (thread_extended_info_t) thread_info_out;
if (*thread_info_count < THREAD_EXTENDED_INFO_COUNT) {
return (KERN_INVALID_ARGUMENT);
}
s = splsched();
thread_lock(thread);
retrieve_thread_basic_info(thread, &basic_info);
extended_info->pth_user_time = ((basic_info.user_time.seconds * (integer_t)NSEC_PER_SEC) + (basic_info.user_time.microseconds * (integer_t)NSEC_PER_USEC));
extended_info->pth_system_time = ((basic_info.system_time.seconds * (integer_t)NSEC_PER_SEC) + (basic_info.system_time.microseconds * (integer_t)NSEC_PER_USEC));
extended_info->pth_cpu_usage = basic_info.cpu_usage;
extended_info->pth_policy = basic_info.policy;
extended_info->pth_run_state = basic_info.run_state;
extended_info->pth_flags = basic_info.flags;
extended_info->pth_sleep_time = basic_info.sleep_time;
extended_info->pth_curpri = thread->sched_pri;
extended_info->pth_priority = thread->base_pri;
extended_info->pth_maxpriority = thread->max_priority;
bsd_getthreadname(thread->uthread,extended_info->pth_name);
thread_unlock(thread);
splx(s);
*thread_info_count = THREAD_EXTENDED_INFO_COUNT;
return (KERN_SUCCESS);
}
else
if (flavor == THREAD_DEBUG_INFO_INTERNAL) {
#if DEVELOPMENT || DEBUG
thread_debug_info_internal_t dbg_info;
if (*thread_info_count < THREAD_DEBUG_INFO_INTERNAL_COUNT)
return (KERN_NOT_SUPPORTED);
if (thread_info_out == NULL)
return (KERN_INVALID_ARGUMENT);
dbg_info = (thread_debug_info_internal_t) thread_info_out;
dbg_info->page_creation_count = thread->t_page_creation_count;
*thread_info_count = THREAD_DEBUG_INFO_INTERNAL_COUNT;
return (KERN_SUCCESS);
#endif
return (KERN_NOT_SUPPORTED);
}
return (KERN_INVALID_ARGUMENT);
}
void
thread_read_times(
thread_t thread,
time_value_t *user_time,
time_value_t *system_time)
{
clock_sec_t secs;
clock_usec_t usecs;
uint64_t tval_user, tval_system;
tval_user = timer_grab(&thread->user_timer);
tval_system = timer_grab(&thread->system_timer);
if (thread->precise_user_kernel_time) {
absolutetime_to_microtime(tval_user, &secs, &usecs);
user_time->seconds = (typeof(user_time->seconds))secs;
user_time->microseconds = usecs;
absolutetime_to_microtime(tval_system, &secs, &usecs);
system_time->seconds = (typeof(system_time->seconds))secs;
system_time->microseconds = usecs;
} else {
tval_user += tval_system;
absolutetime_to_microtime(tval_user, &secs, &usecs);
user_time->seconds = (typeof(user_time->seconds))secs;
user_time->microseconds = usecs;
system_time->seconds = 0;
system_time->microseconds = 0;
}
}
uint64_t thread_get_runtime_self(void)
{
boolean_t interrupt_state;
uint64_t runtime;
thread_t thread = NULL;
processor_t processor = NULL;
thread = current_thread();
interrupt_state = ml_set_interrupts_enabled(FALSE);
processor = current_processor();
timer_switch(PROCESSOR_DATA(processor, thread_timer), mach_absolute_time(), PROCESSOR_DATA(processor, thread_timer));
runtime = (timer_grab(&thread->user_timer) + timer_grab(&thread->system_timer));
ml_set_interrupts_enabled(interrupt_state);
return runtime;
}
kern_return_t
thread_assign(
__unused thread_t thread,
__unused processor_set_t new_pset)
{
return (KERN_FAILURE);
}
kern_return_t
thread_assign_default(
thread_t thread)
{
return (thread_assign(thread, &pset0));
}
kern_return_t
thread_get_assignment(
thread_t thread,
processor_set_t *pset)
{
if (thread == NULL)
return (KERN_INVALID_ARGUMENT);
*pset = &pset0;
return (KERN_SUCCESS);
}
kern_return_t
thread_wire_internal(
host_priv_t host_priv,
thread_t thread,
boolean_t wired,
boolean_t *prev_state)
{
if (host_priv == NULL || thread != current_thread())
return (KERN_INVALID_ARGUMENT);
assert(host_priv == &realhost);
if (prev_state)
*prev_state = (thread->options & TH_OPT_VMPRIV) != 0;
if (wired) {
if (!(thread->options & TH_OPT_VMPRIV))
vm_page_free_reserve(1);
thread->options |= TH_OPT_VMPRIV;
}
else {
if (thread->options & TH_OPT_VMPRIV)
vm_page_free_reserve(-1);
thread->options &= ~TH_OPT_VMPRIV;
}
return (KERN_SUCCESS);
}
kern_return_t
thread_wire(
host_priv_t host_priv,
thread_t thread,
boolean_t wired)
{
return (thread_wire_internal(host_priv, thread, wired, NULL));
}
boolean_t
is_vm_privileged(void)
{
return current_thread()->options & TH_OPT_VMPRIV ? TRUE : FALSE;
}
boolean_t
set_vm_privilege(boolean_t privileged)
{
boolean_t was_vmpriv;
if (current_thread()->options & TH_OPT_VMPRIV)
was_vmpriv = TRUE;
else
was_vmpriv = FALSE;
if (privileged != FALSE)
current_thread()->options |= TH_OPT_VMPRIV;
else
current_thread()->options &= ~TH_OPT_VMPRIV;
return (was_vmpriv);
}
void
set_thread_rwlock_boost(void)
{
current_thread()->rwlock_count++;
}
void
clear_thread_rwlock_boost(void)
{
thread_t thread = current_thread();
if ((thread->rwlock_count-- == 1) && (thread->sched_flags & TH_SFLAG_RW_PROMOTED)) {
lck_rw_clear_promotion(thread);
}
}
void
thread_guard_violation(thread_t thread,
mach_exception_data_type_t code, mach_exception_data_type_t subcode)
{
assert(thread == current_thread());
assert(thread->task != kernel_task);
spl_t s = splsched();
assert(EXC_GUARD_DECODE_GUARD_TYPE(code));
thread->guard_exc_info.code = code;
thread->guard_exc_info.subcode = subcode;
thread_ast_set(thread, AST_GUARD);
ast_propagate(thread);
splx(s);
}
void
guard_ast(thread_t t)
{
const mach_exception_data_type_t
code = t->guard_exc_info.code,
subcode = t->guard_exc_info.subcode;
switch (EXC_GUARD_DECODE_GUARD_TYPE(code)) {
case GUARD_TYPE_MACH_PORT:
mach_port_guard_ast(t, code, subcode);
break;
case GUARD_TYPE_FD:
fd_guard_ast(t, code, subcode);
break;
#if CONFIG_VNGUARD
case GUARD_TYPE_VN:
vn_guard_ast(t, code, subcode);
break;
#endif
default:
panic("guard_exc_info %llx %llx", code, subcode);
}
}
static void
thread_cputime_callback(int warning, __unused const void *arg0, __unused const void *arg1)
{
if (warning == LEDGER_WARNING_ROSE_ABOVE) {
#if CONFIG_TELEMETRY
telemetry_task_ctl(current_task(), TF_CPUMON_WARNING, 1);
#endif
return;
}
#if CONFIG_TELEMETRY
telemetry_task_ctl(current_task(), TF_CPUMON_WARNING, 0);
#endif
if (warning == 0) {
SENDING_NOTIFICATION__THIS_THREAD_IS_CONSUMING_TOO_MUCH_CPU();
}
}
void __attribute__((noinline))
SENDING_NOTIFICATION__THIS_THREAD_IS_CONSUMING_TOO_MUCH_CPU(void)
{
int pid = 0;
task_t task = current_task();
thread_t thread = current_thread();
uint64_t tid = thread->thread_id;
const char *procname = "unknown";
time_value_t thread_total_time = {0, 0};
time_value_t thread_system_time;
time_value_t thread_user_time;
int action;
uint8_t percentage;
uint32_t usage_percent = 0;
uint32_t interval_sec;
uint64_t interval_ns;
uint64_t balance_ns;
boolean_t fatal = FALSE;
boolean_t send_exc_resource = TRUE;
kern_return_t kr;
#ifdef EXC_RESOURCE_MONITORS
mach_exception_data_type_t code[EXCEPTION_CODE_MAX];
#endif
struct ledger_entry_info lei;
assert(thread->t_threadledger != LEDGER_NULL);
task_lock(task);
if (task->rusage_cpu_flags & TASK_RUSECPU_FLAGS_FATAL_CPUMON) {
fatal = TRUE;
send_exc_resource = TRUE;
}
kr = task_suspend_cpumon(task);
task_unlock(task);
if (kr == KERN_INVALID_ARGUMENT) return;
#ifdef MACH_BSD
pid = proc_selfpid();
if (task->bsd_info != NULL) {
procname = proc_name_address(task->bsd_info);
}
#endif
thread_get_cpulimit(&action, &percentage, &interval_ns);
interval_sec = (uint32_t)(interval_ns / NSEC_PER_SEC);
thread_read_times(thread, &thread_user_time, &thread_system_time);
time_value_add(&thread_total_time, &thread_user_time);
time_value_add(&thread_total_time, &thread_system_time);
ledger_get_entry_info(thread->t_threadledger, thread_ledgers.cpu_time, &lei);
absolutetime_to_nanoseconds(lei.lei_balance, &balance_ns);
if (lei.lei_last_refill > 0) {
usage_percent = (uint32_t)((balance_ns*100ULL) / lei.lei_last_refill);
}
printf("process %s[%d] thread %llu caught burning CPU! "
"It used more than %d%% CPU over %u seconds "
"(actual recent usage: %d%% over ~%llu seconds). "
"Thread lifetime cpu usage %d.%06ds, (%d.%06d user, %d.%06d sys) "
"ledger balance: %lld mabs credit: %lld mabs debit: %lld mabs "
"limit: %llu mabs period: %llu ns last refill: %llu ns%s.\n",
procname, pid, tid,
percentage, interval_sec,
usage_percent,
(lei.lei_last_refill + NSEC_PER_SEC/2) / NSEC_PER_SEC,
thread_total_time.seconds, thread_total_time.microseconds,
thread_user_time.seconds, thread_user_time.microseconds,
thread_system_time.seconds,thread_system_time.microseconds,
lei.lei_balance, lei.lei_credit, lei.lei_debit,
lei.lei_limit, lei.lei_refill_period, lei.lei_last_refill,
(fatal ? " [fatal violation]" : ""));
lei.lei_balance = balance_ns;
absolutetime_to_nanoseconds(lei.lei_limit, &lei.lei_limit);
trace_resource_violation(RMON_CPUUSAGE_VIOLATED, &lei);
kr = send_resource_violation(send_cpu_usage_violation, task, &lei,
fatal ? kRNFatalLimitFlag : 0);
if (kr) {
printf("send_resource_violation(CPU usage, ...): error %#x\n", kr);
}
#ifdef EXC_RESOURCE_MONITORS
if (send_exc_resource) {
if (disable_exc_resource) {
printf("process %s[%d] thread %llu caught burning CPU! "
"EXC_RESOURCE%s supressed by a boot-arg\n",
procname, pid, tid, fatal ? " (and termination)" : "");
return;
}
if (audio_active) {
printf("process %s[%d] thread %llu caught burning CPU! "
"EXC_RESOURCE & termination supressed due to audio playback\n",
procname, pid, tid);
return;
}
}
if (send_exc_resource) {
code[0] = code[1] = 0;
EXC_RESOURCE_ENCODE_TYPE(code[0], RESOURCE_TYPE_CPU);
if (fatal) {
EXC_RESOURCE_ENCODE_FLAVOR(code[0], FLAVOR_CPU_MONITOR_FATAL);
}else {
EXC_RESOURCE_ENCODE_FLAVOR(code[0], FLAVOR_CPU_MONITOR);
}
EXC_RESOURCE_CPUMONITOR_ENCODE_INTERVAL(code[0], interval_sec);
EXC_RESOURCE_CPUMONITOR_ENCODE_PERCENTAGE(code[0], percentage);
EXC_RESOURCE_CPUMONITOR_ENCODE_PERCENTAGE(code[1], usage_percent);
exception_triage(EXC_RESOURCE, code, EXCEPTION_CODE_MAX);
}
#endif
if (fatal) {
#if CONFIG_JETSAM
jetsam_on_ledger_cpulimit_exceeded();
#else
task_terminate_internal(task);
#endif
}
}
void thread_update_io_stats(thread_t thread, int size, int io_flags)
{
int io_tier;
if (thread->thread_io_stats == NULL || thread->task->task_io_stats == NULL)
return;
if (io_flags & DKIO_READ) {
UPDATE_IO_STATS(thread->thread_io_stats->disk_reads, size);
UPDATE_IO_STATS_ATOMIC(thread->task->task_io_stats->disk_reads, size);
}
if (io_flags & DKIO_META) {
UPDATE_IO_STATS(thread->thread_io_stats->metadata, size);
UPDATE_IO_STATS_ATOMIC(thread->task->task_io_stats->metadata, size);
}
if (io_flags & DKIO_PAGING) {
UPDATE_IO_STATS(thread->thread_io_stats->paging, size);
UPDATE_IO_STATS_ATOMIC(thread->task->task_io_stats->paging, size);
}
io_tier = ((io_flags & DKIO_TIER_MASK) >> DKIO_TIER_SHIFT);
assert (io_tier < IO_NUM_PRIORITIES);
UPDATE_IO_STATS(thread->thread_io_stats->io_priority[io_tier], size);
UPDATE_IO_STATS_ATOMIC(thread->task->task_io_stats->io_priority[io_tier], size);
UPDATE_IO_STATS(thread->thread_io_stats->total_io, size);
UPDATE_IO_STATS_ATOMIC(thread->task->task_io_stats->total_io, size);
if (!(io_flags & DKIO_READ)) {
DTRACE_IO3(physical_writes, struct task *, thread->task, uint32_t, size, int, io_flags);
ledger_credit(thread->task->ledger, task_ledgers.physical_writes, size);
}
}
static void
init_thread_ledgers(void) {
ledger_template_t t;
int idx;
assert(thread_ledger_template == NULL);
if ((t = ledger_template_create("Per-thread ledger")) == NULL)
panic("couldn't create thread ledger template");
if ((idx = ledger_entry_add(t, "cpu_time", "sched", "ns")) < 0) {
panic("couldn't create cpu_time entry for thread ledger template");
}
if (ledger_set_callback(t, idx, thread_cputime_callback, NULL, NULL) < 0) {
panic("couldn't set thread ledger callback for cpu_time entry");
}
thread_ledgers.cpu_time = idx;
ledger_template_complete(t);
thread_ledger_template = t;
}
int
thread_get_cpulimit(int *action, uint8_t *percentage, uint64_t *interval_ns)
{
int64_t abstime = 0;
uint64_t limittime = 0;
thread_t thread = current_thread();
*percentage = 0;
*interval_ns = 0;
*action = 0;
if (thread->t_threadledger == LEDGER_NULL) {
return (KERN_SUCCESS);
}
ledger_get_period(thread->t_threadledger, thread_ledgers.cpu_time, interval_ns);
ledger_get_limit(thread->t_threadledger, thread_ledgers.cpu_time, &abstime);
if ((abstime == LEDGER_LIMIT_INFINITY) || (*interval_ns == 0)) {
return (KERN_SUCCESS);
}
absolutetime_to_nanoseconds(abstime, &limittime);
*percentage = (limittime * 100ULL) / *interval_ns;
assert(*percentage <= 100);
if (thread->options & TH_OPT_PROC_CPULIMIT) {
assert((thread->options & TH_OPT_PRVT_CPULIMIT) == 0);
*action = THREAD_CPULIMIT_BLOCK;
} else if (thread->options & TH_OPT_PRVT_CPULIMIT) {
assert((thread->options & TH_OPT_PROC_CPULIMIT) == 0);
*action = THREAD_CPULIMIT_EXCEPTION;
} else {
*action = THREAD_CPULIMIT_DISABLE;
}
return (KERN_SUCCESS);
}
int
thread_set_cpulimit(int action, uint8_t percentage, uint64_t interval_ns)
{
thread_t thread = current_thread();
ledger_t l;
uint64_t limittime = 0;
uint64_t abstime = 0;
assert(percentage <= 100);
if (action == THREAD_CPULIMIT_DISABLE) {
if (thread->t_threadledger != LEDGER_NULL) {
l = thread->t_threadledger;
ledger_set_limit(l, thread_ledgers.cpu_time, LEDGER_LIMIT_INFINITY, 0);
ledger_set_action(l, thread_ledgers.cpu_time, LEDGER_ACTION_IGNORE);
thread->options &= ~(TH_OPT_PROC_CPULIMIT | TH_OPT_PRVT_CPULIMIT);
}
return (0);
}
if (interval_ns < MINIMUM_CPULIMIT_INTERVAL_MS * NSEC_PER_MSEC) {
return (KERN_INVALID_ARGUMENT);
}
l = thread->t_threadledger;
if (l == LEDGER_NULL) {
if ((l = ledger_instantiate(thread_ledger_template, LEDGER_CREATE_INACTIVE_ENTRIES)) == LEDGER_NULL)
return (KERN_RESOURCE_SHORTAGE);
ledger_entry_setactive(l, thread_ledgers.cpu_time);
thread->t_threadledger = l;
}
limittime = (interval_ns * percentage) / 100;
nanoseconds_to_absolutetime(limittime, &abstime);
ledger_set_limit(l, thread_ledgers.cpu_time, abstime, cpumon_ustackshots_trigger_pct);
ledger_set_period(l, thread_ledgers.cpu_time, interval_ns);
if (action == THREAD_CPULIMIT_EXCEPTION) {
if (thread->options & TH_OPT_PRVT_CPULIMIT) {
panic("CPU usage monitor activated, but blocking thread limit exists");
}
thread->options |= TH_OPT_PROC_CPULIMIT;
} else {
thread->options &= ~TH_OPT_PROC_CPULIMIT;
thread->options |= TH_OPT_PRVT_CPULIMIT;
ledger_disable_callback(l, thread_ledgers.cpu_time);
ledger_set_action(l, thread_ledgers.cpu_time, LEDGER_ACTION_BLOCK);
}
return (0);
}
static void
sched_call_null(
__unused int type,
__unused thread_t thread)
{
return;
}
void
thread_sched_call(
thread_t thread,
sched_call_t call)
{
thread->sched_call = (call != NULL)? call: sched_call_null;
}
sched_call_t
thread_disable_sched_call(
thread_t thread,
sched_call_t call)
{
if (call) {
spl_t s = splsched();
thread_lock(thread);
if (thread->sched_call == call) {
thread->sched_call = sched_call_null;
} else {
call = NULL;
}
thread_unlock(thread);
splx(s);
}
return call;
}
void
thread_reenable_sched_call(
thread_t thread,
sched_call_t call)
{
if (call) {
spl_t s = splsched();
thread_lock(thread);
thread_sched_call(thread, call);
thread_unlock(thread);
splx(s);
}
}
void
thread_static_param(
thread_t thread,
boolean_t state)
{
thread_mtx_lock(thread);
thread->static_param = state;
thread_mtx_unlock(thread);
}
uint64_t
thread_tid(
thread_t thread)
{
return (thread != THREAD_NULL? thread->thread_id: 0);
}
uint16_t thread_set_tag(thread_t th, uint16_t tag) {
return thread_set_tag_internal(th, tag);
}
uint16_t thread_get_tag(thread_t th) {
return thread_get_tag_internal(th);
}
uint64_t
thread_dispatchqaddr(
thread_t thread)
{
uint64_t dispatchqueue_addr;
uint64_t thread_handle;
if (thread == THREAD_NULL)
return 0;
thread_handle = thread->machine.cthread_self;
if (thread_handle == 0)
return 0;
if (thread->inspection == TRUE)
dispatchqueue_addr = thread_handle + get_task_dispatchqueue_offset(thread->task);
else if (thread->task->bsd_info)
dispatchqueue_addr = thread_handle + get_dispatchqueue_offset_from_proc(thread->task->bsd_info);
else
dispatchqueue_addr = 0;
return dispatchqueue_addr;
}
uint64_t
thread_rettokern_addr(
thread_t thread)
{
uint64_t rettokern_addr;
uint64_t rettokern_offset;
uint64_t thread_handle;
if (thread == THREAD_NULL)
return 0;
thread_handle = thread->machine.cthread_self;
if (thread_handle == 0)
return 0;
if (thread->task->bsd_info) {
rettokern_offset = get_return_to_kernel_offset_from_proc(thread->task->bsd_info);
if (rettokern_offset == 0) {
rettokern_addr = 0;
} else {
rettokern_addr = thread_handle + rettokern_offset;
}
} else {
rettokern_addr = 0;
}
return rettokern_addr;
}
#undef thread_reference
void thread_reference(thread_t thread);
void
thread_reference(
thread_t thread)
{
if (thread != THREAD_NULL)
thread_reference_internal(thread);
}
#undef thread_should_halt
boolean_t
thread_should_halt(
thread_t th)
{
return (thread_should_halt_fast(th));
}
kern_return_t
thread_set_voucher_name(mach_port_name_t voucher_name)
{
thread_t thread = current_thread();
ipc_voucher_t new_voucher = IPC_VOUCHER_NULL;
ipc_voucher_t voucher;
ledger_t bankledger = NULL;
thread_group_t banktg = NULL;
if (MACH_PORT_DEAD == voucher_name)
return KERN_INVALID_RIGHT;
if (MACH_PORT_VALID(voucher_name)) {
new_voucher = convert_port_name_to_voucher(voucher_name);
if (IPC_VOUCHER_NULL == new_voucher)
return KERN_INVALID_ARGUMENT;
}
bank_get_bank_ledger_and_thread_group(new_voucher, &bankledger, &banktg);
thread_mtx_lock(thread);
voucher = thread->ith_voucher;
thread->ith_voucher_name = voucher_name;
thread->ith_voucher = new_voucher;
thread_mtx_unlock(thread);
bank_swap_thread_bank_ledger(thread, bankledger);
KERNEL_DEBUG_CONSTANT_IST(KDEBUG_TRACE,
MACHDBG_CODE(DBG_MACH_IPC,MACH_THREAD_SET_VOUCHER) | DBG_FUNC_NONE,
(uintptr_t)thread_tid(thread),
(uintptr_t)voucher_name,
VM_KERNEL_ADDRPERM((uintptr_t)new_voucher),
1, 0);
if (IPC_VOUCHER_NULL != voucher)
ipc_voucher_release(voucher);
return KERN_SUCCESS;
}
kern_return_t
thread_get_mach_voucher(
thread_act_t thread,
mach_voucher_selector_t __unused which,
ipc_voucher_t *voucherp)
{
ipc_voucher_t voucher;
mach_port_name_t voucher_name;
if (THREAD_NULL == thread)
return KERN_INVALID_ARGUMENT;
thread_mtx_lock(thread);
voucher = thread->ith_voucher;
if (IPC_VOUCHER_NULL != voucher) {
ipc_voucher_reference(voucher);
thread_mtx_unlock(thread);
*voucherp = voucher;
return KERN_SUCCESS;
}
voucher_name = thread->ith_voucher_name;
if (MACH_PORT_VALID(voucher_name)) {
ipc_port_t port;
if (KERN_SUCCESS !=
ipc_object_copyin(thread->task->itk_space, voucher_name,
MACH_MSG_TYPE_COPY_SEND, (ipc_object_t *)&port)) {
thread->ith_voucher_name = MACH_PORT_NULL;
thread_mtx_unlock(thread);
*voucherp = IPC_VOUCHER_NULL;
return KERN_SUCCESS;
}
voucher = convert_port_to_voucher(port);
ipc_voucher_reference(voucher);
thread->ith_voucher = voucher;
thread_mtx_unlock(thread);
KERNEL_DEBUG_CONSTANT_IST(KDEBUG_TRACE,
MACHDBG_CODE(DBG_MACH_IPC,MACH_THREAD_SET_VOUCHER) | DBG_FUNC_NONE,
(uintptr_t)thread_tid(thread),
(uintptr_t)port,
VM_KERNEL_ADDRPERM((uintptr_t)voucher),
2, 0);
ipc_port_release_send(port);
} else
thread_mtx_unlock(thread);
*voucherp = voucher;
return KERN_SUCCESS;
}
kern_return_t
thread_set_mach_voucher(
thread_t thread,
ipc_voucher_t voucher)
{
ipc_voucher_t old_voucher;
ledger_t bankledger = NULL;
thread_group_t banktg = NULL;
if (THREAD_NULL == thread)
return KERN_INVALID_ARGUMENT;
if (thread != current_thread() && thread->started)
return KERN_INVALID_ARGUMENT;
ipc_voucher_reference(voucher);
bank_get_bank_ledger_and_thread_group(voucher, &bankledger, &banktg);
thread_mtx_lock(thread);
old_voucher = thread->ith_voucher;
thread->ith_voucher = voucher;
thread->ith_voucher_name = MACH_PORT_NULL;
thread_mtx_unlock(thread);
bank_swap_thread_bank_ledger(thread, bankledger);
KERNEL_DEBUG_CONSTANT_IST(KDEBUG_TRACE,
MACHDBG_CODE(DBG_MACH_IPC,MACH_THREAD_SET_VOUCHER) | DBG_FUNC_NONE,
(uintptr_t)thread_tid(thread),
(uintptr_t)MACH_PORT_NULL,
VM_KERNEL_ADDRPERM((uintptr_t)voucher),
3, 0);
ipc_voucher_release(old_voucher);
return KERN_SUCCESS;
}
kern_return_t
thread_swap_mach_voucher(
thread_t thread,
ipc_voucher_t new_voucher,
ipc_voucher_t *in_out_old_voucher)
{
mach_port_name_t old_voucher_name;
ipc_voucher_t old_voucher;
ledger_t bankledger = NULL;
thread_group_t banktg = NULL;
if (THREAD_NULL == thread)
return KERN_INVALID_TASK;
if (thread != current_thread() && thread->started)
return KERN_INVALID_ARGUMENT;
bank_get_bank_ledger_and_thread_group(new_voucher, &bankledger, &banktg);
thread_mtx_lock(thread);
old_voucher = thread->ith_voucher;
if (IPC_VOUCHER_NULL == old_voucher) {
old_voucher_name = thread->ith_voucher_name;
if (MACH_PORT_VALID(old_voucher_name)) {
old_voucher = convert_port_name_to_voucher(old_voucher_name);
thread->ith_voucher_name = MACH_PORT_NULL;
thread->ith_voucher = old_voucher;
KERNEL_DEBUG_CONSTANT_IST(KDEBUG_TRACE,
MACHDBG_CODE(DBG_MACH_IPC,MACH_THREAD_SET_VOUCHER) | DBG_FUNC_NONE,
(uintptr_t)thread_tid(thread),
(uintptr_t)old_voucher_name,
VM_KERNEL_ADDRPERM((uintptr_t)old_voucher),
4, 0);
}
}
if (old_voucher == *in_out_old_voucher) {
ipc_voucher_reference(new_voucher);
thread->ith_voucher = new_voucher;
thread->ith_voucher_name = MACH_PORT_NULL;
thread_mtx_unlock(thread);
bank_swap_thread_bank_ledger(thread, bankledger);
KERNEL_DEBUG_CONSTANT_IST(KDEBUG_TRACE,
MACHDBG_CODE(DBG_MACH_IPC,MACH_THREAD_SET_VOUCHER) | DBG_FUNC_NONE,
(uintptr_t)thread_tid(thread),
(uintptr_t)MACH_PORT_NULL,
VM_KERNEL_ADDRPERM((uintptr_t)new_voucher),
5, 0);
ipc_voucher_release(old_voucher);
*in_out_old_voucher = IPC_VOUCHER_NULL;
return KERN_SUCCESS;
}
ipc_voucher_reference(old_voucher);
thread_mtx_unlock(thread);
*in_out_old_voucher = old_voucher;
return KERN_SUCCESS;
}
kern_return_t
thread_get_current_voucher_origin_pid(
int32_t *pid)
{
uint32_t buf_size;
kern_return_t kr;
thread_t thread = current_thread();
buf_size = sizeof(*pid);
kr = mach_voucher_attr_command(thread->ith_voucher,
MACH_VOUCHER_ATTR_KEY_BANK,
BANK_ORIGINATOR_PID,
NULL,
0,
(mach_voucher_attr_content_t)pid,
&buf_size);
return kr;
}
boolean_t
thread_has_thread_name(thread_t th)
{
if ((th) && (th->uthread)) {
return bsd_hasthreadname(th->uthread);
}
return FALSE;
}
void
thread_set_thread_name(thread_t th, const char* name)
{
if ((th) && (th->uthread) && name) {
bsd_setthreadname(th->uthread, name);
}
}
void thread_enable_send_importance(thread_t thread, boolean_t enable)
{
if (enable == TRUE)
thread->options |= TH_OPT_SEND_IMPORTANCE;
else
thread->options &= ~TH_OPT_SEND_IMPORTANCE;
}
kern_allocation_name_t thread_set_allocation_name(kern_allocation_name_t new_name)
{
kern_allocation_name_t ret;
thread_kernel_state_t kstate = thread_get_kernel_state(current_thread());
ret = kstate->allocation_name;
if (!new_name || !kstate->allocation_name) kstate->allocation_name = new_name;
return ret;
}
#if CONFIG_DTRACE
uint32_t dtrace_get_thread_predcache(thread_t thread)
{
if (thread != THREAD_NULL)
return thread->t_dtrace_predcache;
else
return 0;
}
int64_t dtrace_get_thread_vtime(thread_t thread)
{
if (thread != THREAD_NULL)
return thread->t_dtrace_vtime;
else
return 0;
}
int dtrace_get_thread_last_cpu_id(thread_t thread)
{
if ((thread != THREAD_NULL) && (thread->last_processor != PROCESSOR_NULL)) {
return thread->last_processor->cpu_id;
} else {
return -1;
}
}
int64_t dtrace_get_thread_tracing(thread_t thread)
{
if (thread != THREAD_NULL)
return thread->t_dtrace_tracing;
else
return 0;
}
boolean_t dtrace_get_thread_reentering(thread_t thread)
{
if (thread != THREAD_NULL)
return (thread->options & TH_OPT_DTRACE) ? TRUE : FALSE;
else
return 0;
}
vm_offset_t dtrace_get_kernel_stack(thread_t thread)
{
if (thread != THREAD_NULL)
return thread->kernel_stack;
else
return 0;
}
#if KASAN
struct kasan_thread_data *
kasan_get_thread_data(thread_t thread)
{
return &thread->kasan_data;
}
#endif
int64_t dtrace_calc_thread_recent_vtime(thread_t thread)
{
if (thread != THREAD_NULL) {
processor_t processor = current_processor();
uint64_t abstime = mach_absolute_time();
timer_t timer;
timer = PROCESSOR_DATA(processor, thread_timer);
return timer_grab(&(thread->system_timer)) + timer_grab(&(thread->user_timer)) +
(abstime - timer->tstamp);
} else
return 0;
}
void dtrace_set_thread_predcache(thread_t thread, uint32_t predcache)
{
if (thread != THREAD_NULL)
thread->t_dtrace_predcache = predcache;
}
void dtrace_set_thread_vtime(thread_t thread, int64_t vtime)
{
if (thread != THREAD_NULL)
thread->t_dtrace_vtime = vtime;
}
void dtrace_set_thread_tracing(thread_t thread, int64_t accum)
{
if (thread != THREAD_NULL)
thread->t_dtrace_tracing = accum;
}
void dtrace_set_thread_reentering(thread_t thread, boolean_t vbool)
{
if (thread != THREAD_NULL) {
if (vbool)
thread->options |= TH_OPT_DTRACE;
else
thread->options &= (~TH_OPT_DTRACE);
}
}
vm_offset_t dtrace_set_thread_recover(thread_t thread, vm_offset_t recover)
{
vm_offset_t prev = 0;
if (thread != THREAD_NULL) {
prev = thread->recover;
thread->recover = recover;
}
return prev;
}
void dtrace_thread_bootstrap(void)
{
task_t task = current_task();
if (task->thread_count == 1) {
thread_t thread = current_thread();
if (thread->t_dtrace_flags & TH_DTRACE_EXECSUCCESS) {
thread->t_dtrace_flags &= ~TH_DTRACE_EXECSUCCESS;
DTRACE_PROC(exec__success);
KDBG(BSDDBG_CODE(DBG_BSD_PROC,BSD_PROC_EXEC),
task_pid(task));
}
DTRACE_PROC(start);
}
DTRACE_PROC(lwp__start);
}
void
dtrace_thread_didexec(thread_t thread)
{
thread->t_dtrace_flags |= TH_DTRACE_EXECSUCCESS;
}
#endif