#include <kern/assert.h>
#include <kern/exc_resource.h>
#include <kern/telemetry.h>
+#include <kern/policy_internal.h>
+
#include <corpses/task_corpse.h>
#if KPC
#include <kern/kpc.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;
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;
+ task_t exception_task;
+ thread_t exception_thread;
+};
+
static struct thread thread_template, init_thread;
static void sched_call_null(
#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 int proc_selfpid(void);
extern char * proc_name_address(void *p);
struct _thread_ledger_indices thread_ledgers = { -1 };
static ledger_template_t thread_ledger_template = NULL;
-void init_thread_ledgers(void);
-int task_disable_cpumon(task_t task);
+static void init_thread_ledgers(void);
#if CONFIG_JETSAM
void jetsam_on_ledger_cpulimit_exceeded(void);
#define CPUMON_USTACKSHOTS_TRIGGER_DEFAULT_PCT 70
int cpumon_ustackshots_trigger_pct; /* Percentage. Level at which we start gathering telemetry. */
-void __attribute__((noinline)) THIS_THREAD_IS_CONSUMING_TOO_MUCH_CPU__SENDING_EXC_RESOURCE(void);
+void __attribute__((noinline)) SENDING_NOTIFICATION__THIS_THREAD_IS_CONSUMING_TOO_MUCH_CPU(void);
/*
* The smallest interval over which we support limiting CPU consumption is 1ms
* Fill in a template thread for fast initialization.
*/
+#if MACH_ASSERT
+ thread_template.thread_magic = THREAD_MAGIC;
+#endif /* MACH_ASSERT */
+
thread_template.runq = PROCESSOR_NULL;
thread_template.ref_count = 2;
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.pending_promoter[1] = NULL;
thread_template.rwlock_count = 0;
-#if MACH_ASSERT
- thread_template.SHARE_COUNT = 0;
- thread_template.BG_COUNT = 0;
-#endif /* MACH_ASSERT */
thread_template.realtime.deadline = UINT64_MAX;
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;
thread_template.t_dtrace_tracing = 0;
#endif /* CONFIG_DTRACE */
+#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
thread_template.hv_thread_target = NULL;
#endif /* HYPERVISOR */
- thread_template.t_chud = 0;
-
#if (DEVELOPMENT || DEBUG)
thread_template.t_page_creation_throttled_hard = 0;
thread_template.t_page_creation_throttled_soft = 0;
thread_template.t_deduct_bank_ledger_time = 0;
#endif
- thread_template.requested_policy = default_task_requested_policy;
- thread_template.effective_policy = default_task_effective_policy;
- thread_template.pended_policy = default_task_pended_policy;
+ thread_template.requested_policy = (struct thread_requested_policy) {};
+ thread_template.effective_policy = (struct thread_effective_policy) {};
bzero(&thread_template.overrides, sizeof(thread_template.overrides));
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();
+
/*
* Initialize any machine-dependent
* per-thread structures necessary.
init_thread_ledgers();
}
+void
+thread_corpse_continue(void)
+{
+ thread_t thread = current_thread();
+
+ thread_terminate_internal(thread);
+ ml_set_interrupts_enabled(FALSE);
+ ast_taken(AST_APC, TRUE);
+
+ panic("thread_corpse_continue");
+ /*NOTREACHED*/
+}
+
static void
thread_terminate_continue(void)
{
thread_mtx_lock(thread);
ipc_thread_disable(thread);
-
+
thread_mtx_unlock(thread);
s = splsched();
thread_lock(thread);
- assert_thread_sched_count(thread);
-
/*
* Cancel priority depression, wait for concurrent expirations
* on other processors.
thread_mtx_unlock(thread);
task = thread->task;
- uthread_cleanup(task, thread->uthread, task->bsd_info, thread->inspection == 1 ? TRUE : FALSE);
+ uthread_cleanup(task, thread->uthread, task->bsd_info);
threadcnt = hw_atomic_sub(&task->active_thread_count, 1);
+ if (task->bsd_info) {
+ /* trace out pid before we sign off */
+ long dbg_arg1 = 0;
+
+ kdbg_trace_data(thread->task->bsd_info, &dbg_arg1);
+
+ KERNEL_DEBUG_CONSTANT(TRACE_DATA_THREAD_TERMINATE_PID | DBG_FUNC_NONE,
+ dbg_arg1, 0, 0, 0, 0);
+ }
+
/*
* If we are the last thread to terminate and the task is
* associated with a BSD process, perform BSD process exit.
*/
if (threadcnt == 0 && task->bsd_info != NULL) {
+ mach_exception_data_type_t subcode = 0;
+ {
+ /* since we're the last thread in this process, trace out the command name too */
+ 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);
+ }
+
+ /* Get the exit reason before proc_exit */
+ subcode = proc_encode_exit_exception_code(task->bsd_info);
proc_exit(task->bsd_info);
/*
* if there is crash info in task
* last thread for this task.
*/
if (task->corpse_info) {
- task_deliver_crash_notification(task);
+ task_deliver_crash_notification(task, current_thread(), 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();
void
thread_deallocate_safe(thread_t thread)
{
- if (__improbable(hw_atomic_sub(&(thread)->ref_count, 1) == 0))
- panic("bad thread refcount!");
+ assert_thread_magic(thread);
+
+ uint32_t old_refcount = hw_atomic_sub(&(thread)->ref_count, 1) + 1;
+
+ if (__improbable(old_refcount <= 1))
+ panic("bad thread refcount: %d", old_refcount);
}
void
if (thread == THREAD_NULL)
return;
+ assert_thread_magic(thread);
+ assert(thread->ref_count > 0);
+
if (__probable(hw_atomic_sub(&(thread)->ref_count, 1) > 0))
return;
assert(thread->runq == PROCESSOR_NULL);
+ assert(thread->user_promotions == 0);
+
#if KPC
kpc_thread_destroy(thread);
#endif
task_deallocate(task);
+#if MACH_ASSERT
+ assert_thread_magic(thread);
+ thread->thread_magic = 0;
+#endif /* MACH_ASSERT */
+
zfree(thread_zone, thread);
}
+/*
+ * thread_exception_daemon:
+ *
+ * Deliver EXC_RESOURCE exception
+ */
+static void
+thread_exception_daemon(void)
+{
+ struct thread_exception_elt *elt;
+ task_t task;
+ thread_t thread;
+
+ simple_lock(&thread_exception_lock);
+ while ((elt = (struct thread_exception_elt *)dequeue_head(&thread_exception_queue)) != NULL) {
+ simple_unlock(&thread_exception_lock);
+
+ task = elt->exception_task;
+ thread = elt->exception_thread;
+ assert_thread_magic(thread);
+
+ kfree(elt, sizeof(struct thread_exception_elt));
+
+ /* wait for all the threads in the task to terminate */
+ task_lock(task);
+ task_wait_till_threads_terminate_locked(task);
+ task_unlock(task);
+
+ /* Consumes the task ref returned by task_generate_corpse_internal */
+ task_deallocate(task);
+ /* Consumes the thread ref returned by task_generate_corpse_internal */
+ thread_deallocate(thread);
+
+ /* Deliver the EXC_RESOURCE notification, also clears the corpse. */
+ task_deliver_crash_notification(task, thread, 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);
+}
+
+/*
+ * thread_exception_enqueue:
+ *
+ * Enqueue a corpse port to be delivered an EXC_RESOURCE.
+ */
+void
+thread_exception_enqueue(
+ task_t task,
+ thread_t thread)
+{
+ struct thread_exception_elt *elt = (struct thread_exception_elt*) kalloc(
+ sizeof(struct thread_exception_elt));
+
+ 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);
+}
+
+/*
+ * thread_copy_resource_info
+ *
+ * Copy the resource info counters from source
+ * thread to destination thread.
+ */
+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_save = src_thread->system_timer_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;
+
+}
+
/*
* thread_terminate_daemon:
*
(void)splsched();
simple_lock(&thread_terminate_lock);
- while ((thread = (thread_t)dequeue_head(&thread_terminate_queue)) != THREAD_NULL) {
+ while ((thread = qe_dequeue_head(&thread_terminate_queue, struct thread, runq_links)) != THREAD_NULL) {
+ assert_thread_magic(thread);
/*
* if marked for crash reporting, skip reaping.
* for reaping when done
*/
if (thread->inspection){
- enqueue_tail(&crashed_threads_queue, (queue_entry_t)thread);
+ enqueue_tail(&crashed_threads_queue, &thread->runq_links);
continue;
}
simple_unlock(&thread_terminate_lock);
(void)spllo();
- assert(thread->SHARE_COUNT == 0);
- assert(thread->BG_COUNT == 0);
-
task = thread->task;
task_lock(task);
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);
-
- thread_update_qos_cpu_time(thread, FALSE);
+ task->task_energy += ml_energy_stat(thread);
+
+ thread_update_qos_cpu_time(thread);
+
queue_remove(&task->threads, thread, thread_t, task_threads);
task->thread_count--;
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, (queue_entry_t)thread);
+ enqueue_tail(&thread_terminate_queue, &thread->runq_links);
simple_unlock(&thread_terminate_lock);
thread_wakeup((event_t)&thread_terminate_queue);
/*
* thread_terminate_crashed_threads:
- * walk the list of crashed therds and put back set of threads
+ * walk the list of crashed threads and put back set of threads
* who are no longer being inspected.
*/
void
thread_terminate_crashed_threads()
{
- thread_t th_iter, th_remove;
+ thread_t th_remove;
boolean_t should_wake_terminate_queue = FALSE;
simple_lock(&thread_terminate_lock);
* loop through the crashed threads queue
* to put any threads that are not being inspected anymore
*/
- th_iter = (thread_t)queue_first(&crashed_threads_queue);
- while (!queue_end(&crashed_threads_queue, (queue_entry_t)th_iter)) {
- th_remove = th_iter;
- th_iter = (thread_t)queue_next(&th_iter->links);
+ qe_foreach_element_safe(th_remove, &crashed_threads_queue, runq_links) {
/* make sure current_thread is never in crashed queue */
assert(th_remove != current_thread());
- if (th_remove->inspection != TRUE){
- remque((queue_entry_t)th_remove);
- enqueue_tail(&thread_terminate_queue, (queue_entry_t)th_remove);
+
+ if (th_remove->inspection == FALSE) {
+ re_queue_tail(&thread_terminate_queue, &th_remove->runq_links);
should_wake_terminate_queue = TRUE;
}
}
s = splsched();
simple_lock(&thread_stack_lock);
- while ((thread = (thread_t)dequeue_head(&thread_stack_queue)) != THREAD_NULL) {
+ 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);
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, (queue_entry_t)thread);
+ enqueue_tail(&thread_stack_queue, &thread->runq_links);
simple_unlock(&thread_stack_lock);
thread_wakeup((event_t)&thread_stack_queue);
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
+
/*
* Create a new thread.
* Doesn't start the thread running.
#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 /* MACH_ASSERT */
+
zfree(thread_zone, new_thread);
return (KERN_RESOURCE_SHORTAGE);
}
new_thread->uthread = NULL;
/* cred free may not be necessary */
- uthread_cleanup(parent_task, ut, parent_task->bsd_info, FALSE);
+ uthread_cleanup(parent_task, ut, parent_task->bsd_info);
uthread_cred_free(ut);
uthread_zone_free(ut);
#endif /* MACH_BSD */
+#if MACH_ASSERT
+ new_thread->thread_magic = 0;
+#endif /* MACH_ASSERT */
+
zfree(thread_zone, new_thread);
return (KERN_FAILURE);
}
lck_mtx_lock(&tasks_threads_lock);
task_lock(parent_task);
- if ( !parent_task->active || parent_task->halting ||
- ((options & TH_OPTION_NOSUSP) != 0 &&
- parent_task->suspend_count > 0) ||
- (parent_task->thread_count >= task_threadmax &&
- parent_task != kernel_task) ) {
+ /*
+ * Fail thread creation if parent task is being torn down or has too many threads
+ * If the caller asked for TH_OPTION_NOSUSP, also fail if the parent task is suspended
+ */
+ 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);
void *ut = new_thread->uthread;
new_thread->uthread = NULL;
- uthread_cleanup(parent_task, ut, parent_task->bsd_info, FALSE);
+ uthread_cleanup(parent_task, ut, parent_task->bsd_info);
/* cred free may not be necessary */
uthread_cred_free(ut);
uthread_zone_free(ut);
ledger_entry_setactive(new_thread->t_threadledger, thread_ledgers.cpu_time);
}
- new_thread->cpu_time_last_qos = 0;
#ifdef CONFIG_BANK
new_thread->t_bankledger = LEDGER_NULL;
new_thread->t_deduct_bank_ledger_time = 0;
#if KPC
kpc_thread_create(new_thread);
#endif
-
- /* Only need to update policies pushed from task to thread */
- new_thread->requested_policy.bg_iotier = parent_task->effective_policy.bg_iotier;
- new_thread->requested_policy.terminated = parent_task->effective_policy.terminated;
/* Set the thread's scheduling parameters */
-#if defined(CONFIG_SCHED_TIMESHARE_CORE)
- new_thread->sched_stamp = sched_tick;
- new_thread->pri_shift = sched_pri_shift;
-#endif /* defined(CONFIG_SCHED_TIMESHARE_CORE) */
-
new_thread->sched_mode = SCHED(initial_thread_sched_mode)(parent_task);
- new_thread->sched_flags = 0;
new_thread->max_priority = parent_task->max_priority;
new_thread->task_priority = parent_task->priority;
new_priority = new_thread->max_priority;
new_thread->importance = new_priority - new_thread->task_priority;
- new_thread->saved_importance = new_thread->importance;
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 /* defined(CONFIG_SCHED_TIMESHARE_CORE) */
+
thread_policy_create(new_thread);
threads_count++;
new_thread->active = TRUE;
- new_thread->inspection = FALSE;
+ if (task_is_a_corpse_fork(parent_task)) {
+ /* Set the inspection bit if the task is a corpse fork */
+ new_thread->inspection = TRUE;
+ } else {
+ new_thread->inspection = FALSE;
+ }
+ new_thread->corpse_dup = FALSE;
*out_thread = new_thread;
{
kdbg_trace_data(parent_task->bsd_info, &dbg_arg2);
KERNEL_DEBUG_CONSTANT_IST(KDEBUG_TRACE,
- TRACEDBG_CODE(DBG_TRACE_DATA, 1) | DBG_FUNC_NONE,
+ TRACE_DATA_NEWTHREAD | DBG_FUNC_NONE,
(vm_address_t)(uintptr_t)thread_tid(new_thread), dbg_arg2, 0, 0, 0);
kdbg_trace_string(parent_task->bsd_info,
&dbg_arg1, &dbg_arg2, &dbg_arg3, &dbg_arg4);
KERNEL_DEBUG_CONSTANT_IST(KDEBUG_TRACE,
- TRACEDBG_CODE(DBG_TRACE_STRING, 1) | DBG_FUNC_NONE,
+ TRACE_STRING_NEWTHREAD | DBG_FUNC_NONE,
dbg_arg1, dbg_arg2, dbg_arg3, dbg_arg4, 0);
}
static kern_return_t
thread_create_running_internal2(
- register task_t task,
+ 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)
{
- register kern_return_t result;
+ kern_return_t result;
thread_t thread;
if (task == TASK_NULL || task == kernel_task)
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);
}
thread_mtx_lock(thread);
- thread_start_internal(thread);
+ thread_start(thread);
thread_mtx_unlock(thread);
if (from_user)
/* Prototype, see justification above */
kern_return_t
thread_create_running(
- register task_t task,
+ task_t task,
int flavor,
thread_state_t new_state,
mach_msg_type_number_t new_state_count,
kern_return_t
thread_create_running(
- register task_t task,
+ task_t task,
int flavor,
thread_state_t new_state,
mach_msg_type_number_t new_state_count,
kern_return_t
thread_create_running_from_user(
- register task_t task,
+ task_t task,
int flavor,
thread_state_t new_state,
mach_msg_type_number_t new_state_count,
return (KERN_SUCCESS);
}
+kern_return_t
+thread_create_workq_waiting(
+ task_t task,
+ thread_continue_t thread_return,
+ event_t event,
+ thread_t *new_thread)
+{
+ thread_t thread;
+ kern_return_t result;
+
+ 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;
+
+ 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 result;
+}
+
/*
* kernel_thread_create:
*
*new_thread = thread;
thread_mtx_lock(thread);
- thread_start_internal(thread);
+ thread_start(thread);
thread_mtx_unlock(thread);
return (result);
kern_return_t
thread_info_internal(
- register thread_t thread,
+ thread_t thread,
thread_flavor_t flavor,
thread_info_t thread_info_out, /* ptr to OUT array */
mach_msg_type_number_t *thread_info_count) /*IN/OUT*/
}
else
if (flavor == THREAD_IDENTIFIER_INFO) {
- register thread_identifier_info_t identifier_info;
+ thread_identifier_info_t identifier_info;
if (*thread_info_count < THREAD_IDENTIFIER_INFO_COUNT)
return (KERN_INVALID_ARGUMENT);
}
+boolean_t
+is_vm_privileged(void)
+{
+ return current_thread()->options & TH_OPT_VMPRIV ? TRUE : FALSE;
+}
+
boolean_t
set_vm_privilege(boolean_t privileged)
{
#endif
if (warning == 0) {
- THIS_THREAD_IS_CONSUMING_TOO_MUCH_CPU__SENDING_EXC_RESOURCE();
+ SENDING_NOTIFICATION__THIS_THREAD_IS_CONSUMING_TOO_MUCH_CPU();
}
}
void __attribute__((noinline))
-THIS_THREAD_IS_CONSUMING_TOO_MUCH_CPU__SENDING_EXC_RESOURCE(void)
+SENDING_NOTIFICATION__THIS_THREAD_IS_CONSUMING_TOO_MUCH_CPU(void)
{
int pid = 0;
task_t task = current_task();
time_value_t thread_user_time;
int action;
uint8_t percentage;
- uint32_t limit_percent;
- uint32_t usage_percent;
+ 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; /* in addition to RESOURCE_NOTIFY */
+ kern_return_t kr;
+#ifdef EXC_RESOURCE_MONITORS
mach_exception_data_type_t code[EXCEPTION_CODE_MAX];
+#endif /* EXC_RESOURCE_MONITORS */
struct ledger_entry_info lei;
assert(thread->t_threadledger != LEDGER_NULL);
/*
- * Now that a thread has tripped the monitor, disable it for the entire task.
+ * Extract the fatal bit and suspend the monitor (which clears the bit).
*/
task_lock(task);
- if ((task->rusage_cpu_flags & TASK_RUSECPU_FLAGS_PERTHR_LIMIT) == 0) {
- /*
- * The CPU usage monitor has been disabled on our task, so some other
- * thread must have gotten here first. We only send one exception per
- * task lifetime, so there's nothing left for us to do here.
- */
- task_unlock(task);
- return;
- }
if (task->rusage_cpu_flags & TASK_RUSECPU_FLAGS_FATAL_CPUMON) {
fatal = TRUE;
+ send_exc_resource = TRUE;
}
- task_disable_cpumon(task);
+ /* Only one thread can be here at a time. Whichever makes it through
+ first will successfully suspend the monitor and proceed to send the
+ notification. Other threads will get an error trying to suspend the
+ monitor and give up on sending the notification. In the first release,
+ the monitor won't be resumed for a number of seconds, but we may
+ eventually need to handle low-latency resume.
+ */
+ 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)
+ if (task->bsd_info != NULL) {
procname = proc_name_address(task->bsd_info);
+ }
#endif
thread_get_cpulimit(&action, &percentage, &interval_ns);
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);
+ /* credit/debit/balance/limit are in absolute time units;
+ the refill info is in nanoseconds. */
absolutetime_to_nanoseconds(lei.lei_balance, &balance_ns);
- usage_percent = (uint32_t) ((balance_ns * 100ULL) / lei.lei_last_refill);
-
- /* Show refill period in the same units as balance, limit, etc */
- nanoseconds_to_absolutetime(lei.lei_refill_period, &lei.lei_refill_period);
+ if (lei.lei_last_refill > 0) {
+ usage_percent = (uint32_t)((balance_ns*100ULL) / lei.lei_last_refill);
+ }
- limit_percent = (uint32_t) ((lei.lei_limit * 100ULL) / lei.lei_refill_period);
+ /* TODO: show task total runtime (via TASK_ABSOLUTETIME_INFO)? */
+ 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]" : ""));
- /* TODO: show task total runtime as well? see TASK_ABSOLUTETIME_INFO */
+ /*
+ For now, send RESOURCE_NOTIFY in parallel with EXC_RESOURCE. Once
+ we have logging parity, we will stop sending EXC_RESOURCE (24508922).
+ */
- if (disable_exc_resource) {
- printf("process %s[%d] thread %llu caught burning CPU!; EXC_RESOURCE "
- "supressed by a boot-arg\n", procname, pid, tid);
- return;
+ /* RESOURCE_NOTIFY MIG specifies nanoseconds of CPU time */
+ 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);
}
- if (audio_active) {
- printf("process %s[%d] thread %llu caught burning CPU!; EXC_RESOURCE "
- "supressed due to audio playback\n", procname, pid, tid);
- return;
+#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;
+ }
}
- printf("process %s[%d] thread %llu caught burning CPU! "
- "It used more than %d%% CPU (Actual recent usage: %d%%) over %d seconds. "
- "thread lifetime cpu usage %d.%06d seconds, (%d.%06d user, %d.%06d system) "
- "ledger info: balance: %lld credit: %lld debit: %lld limit: %llu (%d%%) "
- "period: %llu time since last refill (ns): %llu %s\n",
- procname, pid, tid,
- percentage, usage_percent, interval_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, limit_percent,
- lei.lei_refill_period, lei.lei_last_refill,
- (fatal ? "[fatal violation]" : ""));
-
-
- 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);
+
+
+ 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);
}
- EXC_RESOURCE_CPUMONITOR_ENCODE_INTERVAL(code[0], interval_sec);
- EXC_RESOURCE_CPUMONITOR_ENCODE_PERCENTAGE(code[0], limit_percent);
- EXC_RESOURCE_CPUMONITOR_ENCODE_PERCENTAGE(code[1], usage_percent);
- exception_triage(EXC_RESOURCE, code, EXCEPTION_CODE_MAX);
+#endif /* EXC_RESOURCE_MONITORS */
if (fatal) {
#if CONFIG_JETSAM
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);
+ }
}
-void
+static void
init_thread_ledgers(void) {
ledger_template_t t;
int idx;
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,
thread_dispatchqaddr(
thread_t thread)
{
- uint64_t dispatchqueue_addr = 0;
- uint64_t thread_handle = 0;
+ uint64_t dispatchqueue_addr;
+ uint64_t thread_handle;
- if (thread != THREAD_NULL) {
- thread_handle = thread->machine.cthread_self;
-
- 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);
- }
+ 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);
+ return dispatchqueue_addr;
}
/*
return kr;
}
+boolean_t
+thread_has_thread_name(thread_t th)
+{
+ if ((th) && (th->uthread)) {
+ return bsd_hasthreadname(th->uthread);
+ }
+
+ /*
+ * This is an odd case; clients may set the thread name based on the lack of
+ * a name, but in this context there is no uthread to attach the name to.
+ */
+ return FALSE;
+}
+
+void
+thread_set_thread_name(thread_t th, const char* name)
+{
+ if ((th) && (th->uthread) && name) {
+ bsd_setthreadname(th->uthread, name);
+ }
+}
+
/*
* thread_enable_send_importance - set/clear the SEND_IMPORTANCE thread option bit.
*/
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);
}
projects / apple / xnu.git / blobdiff