#include <mach/thread_act_server.h>
#include <mach/mach_host_server.h>
-/*
- * Per-Cpu stashed global state
- */
-vm_offset_t active_stacks[NCPUS]; /* per-cpu active stacks */
-vm_offset_t kernel_stack[NCPUS]; /* top of active stacks */
-thread_act_t active_kloaded[NCPUS]; /* + act if kernel loaded */
+static struct zone *thread_zone;
-struct zone *thread_shuttle_zone;
-
-queue_head_t reaper_queue;
-decl_simple_lock_data(,reaper_lock)
-thread_call_t thread_reaper_call;
+static queue_head_t reaper_queue;
+decl_simple_lock_data(static,reaper_lock)
extern int tick;
-extern void pcb_module_init(void);
-
/* private */
-static struct thread_shuttle thr_sh_template;
+static struct thread thread_template, init_thread;
#if MACH_DEBUG
#endif /* MACHINE_STACK */
#endif /* MACH_DEBUG */
-/* Forwards */
-void thread_collect_scan(void);
-
-kern_return_t thread_create_shuttle(
- thread_act_t thr_act,
- integer_t priority,
- void (*start)(void),
- thread_t *new_thread);
-
-extern void Load_context(
- thread_t thread);
-
-
-/*
- * Machine-dependent code must define:
- * thread_machine_init
- * thread_machine_terminate
- * thread_machine_collect
- *
- * The thread->pcb field is reserved for machine-dependent code.
- */
-
#ifdef MACHINE_STACK
/*
* Machine-dependent code must define:
* because stack_alloc_try/thread_invoke operate at splsched.
*/
-decl_simple_lock_data(,stack_lock_data) /* splsched only */
-#define stack_lock() simple_lock(&stack_lock_data)
-#define stack_unlock() simple_unlock(&stack_lock_data)
+decl_simple_lock_data(static,stack_lock_data)
+#define stack_lock() simple_lock(&stack_lock_data)
+#define stack_unlock() simple_unlock(&stack_lock_data)
+
+static vm_map_t stack_map;
+static vm_offset_t stack_free_list;
+
+static vm_offset_t stack_free_cache[NCPUS];
-mutex_t stack_map_lock; /* Lock when allocating stacks maps */
-vm_map_t stack_map; /* Map for allocating stacks */
-vm_offset_t stack_free_list; /* splsched only */
unsigned int stack_free_max = 0;
-unsigned int stack_free_count = 0; /* splsched only */
-unsigned int stack_free_limit = 1; /* Arbitrary */
+unsigned int stack_free_count = 0; /* splsched only */
+unsigned int stack_free_limit = 1; /* Arbitrary */
+
+unsigned int stack_cache_hits = 0; /* debugging */
-unsigned int stack_alloc_hits = 0; /* debugging */
+unsigned int stack_alloc_hits = 0; /* debugging */
unsigned int stack_alloc_misses = 0; /* debugging */
unsigned int stack_alloc_total = 0;
/*
* stack_alloc:
*
- * Allocate a kernel stack for an activation.
+ * Allocate a kernel stack for a thread.
* May block.
*/
vm_offset_t
if (stack)
return (stack);
-/*
- * We first try the free list. It is probably empty, or
- * stack_alloc_try would have succeeded, but possibly a stack was
- * freed before the swapin thread got to us.
- *
- * We allocate stacks from their own map which is submaps of the
- * kernel map. Because we want to have a guard page (at least) in
- * front of each stack to catch evil code that overruns its stack, we
- * allocate the stack on aligned boundaries. The boundary is
- * calculated as the next power of 2 above the stack size. For
- * example, a stack of 4 pages would have a boundry of 8, likewise 5
- * would also be 8.
- *
- * We limit the number of stacks to be one allocation chunk
- * (THREAD_CHUNK) more than the maximum number of threads
- * (THREAD_MAX). The extra is to allow for priviliged threads that
- * can sometimes have 2 stacks.
- *
- */
-
s = splsched();
stack_lock();
stack = stack_free_list;
stack_unlock();
splx(s);
- if (stack != 0) { /* Did we find a free one? */
- stack_attach(thread, stack, start_pos); /* Initialize it */
- return (stack); /* Send it on home */
+ if (stack != 0) {
+ machine_stack_attach(thread, stack, start_pos);
+ return (stack);
}
if (kernel_memory_allocate(
if (stack_alloc_total > stack_alloc_hiwater)
stack_alloc_hiwater = stack_alloc_total;
- stack_attach(thread, stack, start_pos);
+ machine_stack_attach(thread, stack, start_pos);
return (stack);
}
* stack_free:
*
* Free a kernel stack.
- * Called at splsched.
*/
void
stack_free(
thread_t thread)
{
- vm_offset_t stack = stack_detach(thread);
+ vm_offset_t stack = machine_stack_detach(thread);
assert(stack);
- if (stack != thread->stack_privilege) {
+ if (stack != thread->reserved_stack) {
+ spl_t s = splsched();
+ vm_offset_t *cache;
+
+ cache = &stack_free_cache[cpu_number()];
+ if (*cache == 0) {
+ *cache = stack;
+ splx(s);
+
+ return;
+ }
+
stack_lock();
stack_next(stack) = stack_free_list;
stack_free_list = stack;
if (++stack_free_count > stack_free_max)
stack_free_max = stack_free_count;
stack_unlock();
+ splx(s);
}
}
-static void
+void
stack_free_stack(
vm_offset_t stack)
{
- spl_t s;
+ spl_t s = splsched();
+ vm_offset_t *cache;
+
+ cache = &stack_free_cache[cpu_number()];
+ if (*cache == 0) {
+ *cache = stack;
+ splx(s);
+
+ return;
+ }
- s = splsched();
stack_lock();
stack_next(stack) = stack_free_list;
stack_free_list = stack;
void
stack_collect(void)
{
- vm_offset_t stack;
- int i;
- spl_t s;
+ spl_t s = splsched();
- s = splsched();
stack_lock();
while (stack_free_count > stack_free_limit) {
- stack = stack_free_list;
+ vm_offset_t stack = stack_free_list;
+
stack_free_list = stack_next(stack);
stack_free_count--;
stack_unlock();
splx(s);
}
+/*
+ * stack_alloc_try:
+ *
+ * Non-blocking attempt to allocate a kernel stack.
+ * Called at splsched with the thread locked.
+ */
+
+boolean_t stack_alloc_try(
+ thread_t thread,
+ void (*start)(thread_t))
+{
+ register vm_offset_t stack, *cache;
+
+ cache = &stack_free_cache[cpu_number()];
+ if (stack = *cache) {
+ *cache = 0;
+ machine_stack_attach(thread, stack, start);
+ stack_cache_hits++;
+
+ return (TRUE);
+ }
+
+ stack_lock();
+ stack = stack_free_list;
+ if (stack != (vm_offset_t)0) {
+ stack_free_list = stack_next(stack);
+ stack_free_count--;
+ }
+ stack_unlock();
+
+ if (stack == 0)
+ stack = thread->reserved_stack;
+
+ if (stack != 0) {
+ machine_stack_attach(thread, stack, start);
+ stack_alloc_hits++;
+
+ return (TRUE);
+ }
+ else {
+ stack_alloc_misses++;
+
+ return (FALSE);
+ }
+}
#if MACH_DEBUG
/*
*exhaustable = 0;
}
-
-/*
- * stack_privilege:
- *
- * stack_alloc_try on this thread must always succeed.
- */
-
void
stack_privilege(
- register thread_t thread)
+ register thread_t thread)
+{
+ /* OBSOLETE */
+}
+
+void
+thread_bootstrap(void)
{
/*
- * This implementation only works for the current thread.
+ * Fill in a template thread for fast initialization.
*/
- if (thread != current_thread())
- panic("stack_privilege");
+ thread_template.runq = RUN_QUEUE_NULL;
- if (thread->stack_privilege == 0)
- thread->stack_privilege = current_stack();
-}
+ thread_template.ref_count = 1;
-/*
- * stack_alloc_try:
- *
- * Non-blocking attempt to allocate a kernel stack.
- * Called at splsched with the thread locked.
- */
+ thread_template.reason = AST_NONE;
+ thread_template.at_safe_point = FALSE;
+ thread_template.wait_event = NO_EVENT64;
+ thread_template.wait_queue = WAIT_QUEUE_NULL;
+ thread_template.wait_result = THREAD_WAITING;
+ thread_template.interrupt_level = THREAD_ABORTSAFE;
+ thread_template.state = TH_STACK_HANDOFF | TH_WAIT | TH_UNINT;
+ thread_template.wake_active = FALSE;
+ thread_template.active_callout = FALSE;
+ thread_template.continuation = (void (*)(void))0;
+ thread_template.top_act = THR_ACT_NULL;
-boolean_t stack_alloc_try(
- thread_t thread,
- void (*start_pos)(thread_t))
-{
- register vm_offset_t stack = thread->stack_privilege;
+ thread_template.importance = 0;
+ thread_template.sched_mode = 0;
+ thread_template.safe_mode = 0;
- if (stack == 0) {
- stack_lock();
+ thread_template.priority = 0;
+ 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] =
+ thread_template.pending_promoter[1] = NULL;
- stack = stack_free_list;
- if (stack != (vm_offset_t)0) {
- stack_free_list = stack_next(stack);
- stack_free_count--;
- }
+ thread_template.realtime.deadline = UINT64_MAX;
- stack_unlock();
- }
+ thread_template.current_quantum = 0;
- if (stack != 0) {
- stack_attach(thread, stack, start_pos);
- stack_alloc_hits++;
+ thread_template.computation_metered = 0;
+ thread_template.computation_epoch = 0;
- return (TRUE);
- }
- else {
- stack_alloc_misses++;
+ thread_template.cpu_usage = 0;
+ thread_template.cpu_delta = 0;
+ thread_template.sched_usage = 0;
+ thread_template.sched_delta = 0;
+ thread_template.sched_stamp = 0;
+ thread_template.sleep_stamp = 0;
+ thread_template.safe_release = 0;
- return (FALSE);
- }
-}
+ thread_template.bound_processor = PROCESSOR_NULL;
+ thread_template.last_processor = PROCESSOR_NULL;
+ thread_template.last_switch = 0;
-uint64_t max_unsafe_computation;
-extern int max_unsafe_quanta;
+ thread_template.vm_privilege = FALSE;
-uint32_t sched_safe_duration;
+ timer_init(&(thread_template.user_timer));
+ timer_init(&(thread_template.system_timer));
+ thread_template.user_timer_save.low = 0;
+ thread_template.user_timer_save.high = 0;
+ thread_template.system_timer_save.low = 0;
+ thread_template.system_timer_save.high = 0;
-uint64_t max_poll_computation;
-extern int max_poll_quanta;
+ thread_template.processor_set = PROCESSOR_SET_NULL;
-uint32_t std_quantum;
-uint32_t min_std_quantum;
+ thread_template.act_ref_count = 2;
-uint32_t max_rt_quantum;
-uint32_t min_rt_quantum;
+ thread_template.special_handler.handler = special_handler;
+ thread_template.special_handler.next = 0;
+
+#if MACH_HOST
+ thread_template.may_assign = TRUE;
+ thread_template.assign_active = FALSE;
+#endif /* MACH_HOST */
+ thread_template.funnel_lock = THR_FUNNEL_NULL;
+ thread_template.funnel_state = 0;
+#if MACH_LDEBUG
+ thread_template.mutex_count = 0;
+#endif /* MACH_LDEBUG */
+
+ init_thread = thread_template;
+
+ init_thread.top_act = &init_thread;
+ init_thread.thread = &init_thread;
+ machine_thread_set_current(&init_thread);
+}
void
thread_init(void)
kern_return_t ret;
unsigned int stack;
- thread_shuttle_zone = zinit(
- sizeof(struct thread_shuttle),
- THREAD_MAX * sizeof(struct thread_shuttle),
- THREAD_CHUNK * sizeof(struct thread_shuttle),
+ thread_zone = zinit(
+ sizeof(struct thread),
+ THREAD_MAX * sizeof(struct thread),
+ THREAD_CHUNK * sizeof(struct thread),
"threads");
- /*
- * Fill in a template thread_shuttle for fast initialization.
- * [Fields that must be (or are typically) reset at
- * time of creation are so noted.]
- */
-
- /* thr_sh_template.links (none) */
- thr_sh_template.runq = RUN_QUEUE_NULL;
-
-
- /* thr_sh_template.task (later) */
- /* thr_sh_template.thread_list (later) */
- /* thr_sh_template.pset_threads (later) */
-
- /* one ref for pset, one for activation */
- thr_sh_template.ref_count = 2;
-
- thr_sh_template.wait_event = NO_EVENT;
- thr_sh_template.wait_result = KERN_SUCCESS;
- thr_sh_template.wait_queue = WAIT_QUEUE_NULL;
- thr_sh_template.wake_active = FALSE;
- thr_sh_template.state = TH_STACK_HANDOFF | TH_WAIT | TH_UNINT;
- thr_sh_template.interruptible = TRUE;
- thr_sh_template.continuation = (void (*)(void))0;
- thr_sh_template.top_act = THR_ACT_NULL;
-
- thr_sh_template.importance = 0;
- thr_sh_template.sched_mode = 0;
- thr_sh_template.safe_mode = 0;
-
- thr_sh_template.priority = 0;
- thr_sh_template.sched_pri = 0;
- thr_sh_template.depress_priority = -1;
- thr_sh_template.max_priority = 0;
- thr_sh_template.task_priority = 0;
-
- thr_sh_template.current_quantum = 0;
-
- thr_sh_template.metered_computation = 0;
- thr_sh_template.computation_epoch = 0;
-
- thr_sh_template.cpu_usage = 0;
- thr_sh_template.cpu_delta = 0;
- thr_sh_template.sched_usage = 0;
- thr_sh_template.sched_delta = 0;
- thr_sh_template.sched_stamp = 0;
- thr_sh_template.sleep_stamp = 0;
- thr_sh_template.safe_release = 0;
-
- thr_sh_template.vm_privilege = FALSE;
-
- timer_init(&(thr_sh_template.user_timer));
- timer_init(&(thr_sh_template.system_timer));
- thr_sh_template.user_timer_save.low = 0;
- thr_sh_template.user_timer_save.high = 0;
- thr_sh_template.system_timer_save.low = 0;
- thr_sh_template.system_timer_save.high = 0;
-
- thr_sh_template.active = FALSE; /* reset */
-
- /* thr_sh_template.processor_set (later) */
-#if NCPUS > 1
- thr_sh_template.bound_processor = PROCESSOR_NULL;
-#endif /*NCPUS > 1*/
-#if MACH_HOST
- thr_sh_template.may_assign = TRUE;
- thr_sh_template.assign_active = FALSE;
-#endif /* MACH_HOST */
- thr_sh_template.funnel_state = 0;
-
-#if NCPUS > 1
- /* thr_sh_template.last_processor (later) */
-#endif /* NCPUS > 1 */
-
/*
* Initialize other data structures used in
* this module.
queue_init(&reaper_queue);
simple_lock_init(&reaper_lock, ETAP_THREAD_REAPER);
- thr_sh_template.funnel_lock = THR_FUNNEL_NULL;
#ifndef MACHINE_STACK
simple_lock_init(&stack_lock_data, ETAP_THREAD_STACK); /* Initialize the stack lock */
- if (KERNEL_STACK_SIZE < round_page(KERNEL_STACK_SIZE)) { /* Kernel stacks must be multiples of pages */
+ if (KERNEL_STACK_SIZE < round_page_32(KERNEL_STACK_SIZE)) { /* Kernel stacks must be multiples of pages */
panic("thread_init: kernel stack size (%08X) must be a multiple of page size (%08X)\n",
KERNEL_STACK_SIZE, PAGE_SIZE);
}
#endif /* MACHINE_STACK */
-#if MACH_LDEBUG
- thr_sh_template.kthread = FALSE;
- thr_sh_template.mutex_count = 0;
-#endif /* MACH_LDEBUG */
-
- {
- uint64_t abstime;
-
- clock_interval_to_absolutetime_interval(
- std_quantum_us, NSEC_PER_USEC, &abstime);
- assert((abstime >> 32) == 0 && (uint32_t)abstime != 0);
- std_quantum = abstime;
-
- /* 250 us */
- clock_interval_to_absolutetime_interval(250, NSEC_PER_USEC, &abstime);
- assert((abstime >> 32) == 0 && (uint32_t)abstime != 0);
- min_std_quantum = abstime;
-
- /* 50 us */
- clock_interval_to_absolutetime_interval(50, NSEC_PER_USEC, &abstime);
- assert((abstime >> 32) == 0 && (uint32_t)abstime != 0);
- min_rt_quantum = abstime;
-
- /* 50 ms */
- clock_interval_to_absolutetime_interval(
- 50, 1000*NSEC_PER_USEC, &abstime);
- assert((abstime >> 32) == 0 && (uint32_t)abstime != 0);
- max_rt_quantum = abstime;
-
- max_unsafe_computation = max_unsafe_quanta * std_quantum;
- max_poll_computation = max_poll_quanta * std_quantum;
-
- sched_safe_duration = 2 * max_unsafe_quanta *
- (std_quantum_us / (1000 * 1000)) *
- (1 << SCHED_TICK_SHIFT);
- }
-
/*
* Initialize any machine-dependent
* per-thread structures necessary.
*/
- thread_machine_init();
+ machine_thread_init();
}
+/*
+ * Called at splsched.
+ */
void
thread_reaper_enqueue(
thread_t thread)
{
- /*
- * thread lock is already held, splsched()
- * not necessary here.
- */
simple_lock(&reaper_lock);
enqueue_tail(&reaper_queue, (queue_entry_t)thread);
simple_unlock(&reaper_lock);
- thread_call_enter(thread_reaper_call);
+ thread_wakeup((event_t)&reaper_queue);
}
+void
+thread_termination_continue(void)
+{
+ panic("thread_termination_continue");
+ /*NOTREACHED*/
+}
/*
* Routine: thread_terminate_self
void
thread_terminate_self(void)
{
- register thread_t thread = current_thread();
- thread_act_t thr_act = thread->top_act;
+ thread_act_t thr_act = current_act();
+ thread_t thread;
task_t task = thr_act->task;
- int active_acts;
+ long active_acts;
spl_t s;
/*
* We should be at the base of the inheritance chain.
*/
+ thread = act_lock_thread(thr_act);
assert(thr_act->thread == thread);
+ /* This will allow no more control ops on this thr_act. */
+ ipc_thr_act_disable(thr_act);
+
+ /* Clean-up any ulocks that are still owned by the thread
+ * activation (acquired but not released or handed-off).
+ */
+ act_ulock_release_all(thr_act);
+
+ act_unlock_thread(thr_act);
+
_mk_sp_thread_depress_abort(thread, TRUE);
/*
* If so, and the task is associated with a BSD process, we
* need to call BSD and let them clean up.
*/
- task_lock(task);
- active_acts = --task->active_act_count;
- task_unlock(task);
- if (!active_acts && task->bsd_info)
- proc_exit(task->bsd_info);
+ active_acts = hw_atomic_sub(&task->active_thread_count, 1);
-#ifdef CALLOUT_RPC_MODEL
- if (thr_act->lower) {
- /*
- * JMM - RPC will not be using a callout/stack manipulation
- * mechanism. instead we will let it return normally as if
- * from a continuation. Accordingly, these need to be cleaned
- * up a bit.
- */
- act_switch_swapcheck(thread, (ipc_port_t)0);
- act_lock(thr_act); /* hierarchy violation XXX */
- (void) switch_act(THR_ACT_NULL);
- assert(thr_act->ref_count == 1); /* XXX */
- /* act_deallocate(thr_act); XXX */
- prev_act = thread->top_act;
- /*
- * disable preemption to protect kernel stack changes
- * disable_preemption();
- * MACH_RPC_RET(prev_act) = KERN_RPC_SERVER_TERMINATED;
- * machine_kernel_stack_init(thread, mach_rpc_return_error);
- */
- act_unlock(thr_act);
-
- /*
- * Load_context(thread);
- */
- /* NOTREACHED */
- }
-
-#else /* !CALLOUT_RPC_MODEL */
+ if (active_acts == 0 && task->bsd_info)
+ proc_exit(task->bsd_info);
+ /* JMM - for now, no migration */
assert(!thr_act->lower);
-#endif /* CALLOUT_RPC_MODEL */
-
- s = splsched();
- thread_lock(thread);
- thread->active = FALSE;
- thread_unlock(thread);
- splx(s);
-
thread_timer_terminate();
- /* flush any lazy HW state while in own context */
- thread_machine_flush(thr_act);
-
ipc_thread_terminate(thread);
s = splsched();
thread_lock(thread);
- thread->state |= (TH_HALTED|TH_TERMINATE);
+ thread->state |= TH_TERMINATE;
assert((thread->state & TH_UNINT) == 0);
thread_mark_wait_locked(thread, THREAD_UNINT);
+ assert(thread->promotions == 0);
thread_unlock(thread);
/* splx(s); */
ETAP_SET_REASON(thread, BLOCKED_ON_TERMINATION);
- thread_block((void (*)(void)) 0);
- panic("the zombie walks!");
+ thread_block(thread_termination_continue);
/*NOTREACHED*/
}
-
/*
* Create a new thread.
- * Doesn't start the thread running; It first must be attached to
- * an activation - then use thread_go to start it.
+ * Doesn't start the thread running.
*/
-kern_return_t
-thread_create_shuttle(
- thread_act_t thr_act,
+static kern_return_t
+thread_create_internal(
+ task_t parent_task,
integer_t priority,
void (*start)(void),
- thread_t *new_thread)
+ thread_t *out_thread)
{
- thread_t new_shuttle;
- task_t parent_task = thr_act->task;
+ thread_t new_thread;
processor_set_t pset;
- kern_return_t result;
- int suspcnt;
-
- assert(!thr_act->thread);
- assert(!thr_act->pool_port);
+ static thread_t first_thread;
/*
* Allocate a thread and initialize static fields
*/
- new_shuttle = (thread_t)zalloc(thread_shuttle_zone);
- if (new_shuttle == THREAD_NULL)
+ if (first_thread == NULL)
+ new_thread = first_thread = current_act();
+ else
+ new_thread = (thread_t)zalloc(thread_zone);
+ if (new_thread == NULL)
return (KERN_RESOURCE_SHORTAGE);
- *new_shuttle = thr_sh_template;
+ if (new_thread != first_thread)
+ *new_thread = thread_template;
- thread_lock_init(new_shuttle);
- rpc_lock_init(new_shuttle);
- wake_lock_init(new_shuttle);
- new_shuttle->sleep_stamp = sched_tick;
+#ifdef MACH_BSD
+ {
+ extern void *uthread_alloc(task_t, thread_act_t);
- /*
- * Thread still isn't runnable yet (our caller will do
- * that). Initialize runtime-dependent fields here.
- */
- result = thread_machine_create(new_shuttle, thr_act, thread_continue);
- assert (result == KERN_SUCCESS);
+ new_thread->uthread = uthread_alloc(parent_task, new_thread);
+ if (new_thread->uthread == NULL) {
+ zfree(thread_zone, (vm_offset_t)new_thread);
+ return (KERN_RESOURCE_SHORTAGE);
+ }
+ }
+#endif /* MACH_BSD */
- thread_start(new_shuttle, start);
- thread_timer_setup(new_shuttle);
- ipc_thread_init(new_shuttle);
+ if (machine_thread_create(new_thread, parent_task) != KERN_SUCCESS) {
+#ifdef MACH_BSD
+ {
+ extern void uthread_free(task_t, void *, void *, void *);
+ void *ut = new_thread->uthread;
- pset = parent_task->processor_set;
- if (!pset->active) {
- pset = &default_pset;
+ new_thread->uthread = NULL;
+ uthread_free(parent_task, (void *)new_thread, ut, parent_task->bsd_info);
+ }
+#endif /* MACH_BSD */
+ zfree(thread_zone, (vm_offset_t)new_thread);
+ return (KERN_FAILURE);
}
+
+ new_thread->task = parent_task;
+
+ thread_lock_init(new_thread);
+ wake_lock_init(new_thread);
+
+ mutex_init(&new_thread->lock, ETAP_THREAD_ACT);
+
+ ipc_thr_act_init(parent_task, new_thread);
+
+ ipc_thread_init(new_thread);
+ queue_init(&new_thread->held_ulocks);
+ act_prof_init(new_thread, parent_task);
+
+ new_thread->continuation = start;
+ new_thread->sleep_stamp = sched_tick;
+
+ pset = parent_task->processor_set;
+ assert(pset == &default_pset);
pset_lock(pset);
task_lock(parent_task);
+ assert(parent_task->processor_set == pset);
- /*
- * Don't need to initialize because the context switch
- * code will set it before it can be used.
- */
- if (!parent_task->active) {
+ if ( !parent_task->active ||
+ (parent_task->thread_count >= THREAD_MAX &&
+ parent_task != kernel_task)) {
task_unlock(parent_task);
pset_unlock(pset);
- thread_machine_destroy(new_shuttle);
- zfree(thread_shuttle_zone, (vm_offset_t) new_shuttle);
+
+#ifdef MACH_BSD
+ {
+ extern void uthread_free(task_t, void *, void *, void *);
+ void *ut = new_thread->uthread;
+
+ new_thread->uthread = NULL;
+ uthread_free(parent_task, (void *)new_thread, ut, parent_task->bsd_info);
+ }
+#endif /* MACH_BSD */
+ act_prof_deallocate(new_thread);
+ ipc_thr_act_terminate(new_thread);
+ machine_thread_destroy(new_thread);
+ zfree(thread_zone, (vm_offset_t) new_thread);
return (KERN_FAILURE);
}
- act_attach(thr_act, new_shuttle, 0);
+ act_attach(new_thread, new_thread);
+
+ task_reference_locked(parent_task);
- /* Chain the thr_act onto the task's list */
- queue_enter(&parent_task->thr_acts, thr_act, thread_act_t, thr_acts);
- parent_task->thr_act_count++;
- parent_task->res_act_count++;
- parent_task->active_act_count++;
+ /* Cache the task's map */
+ new_thread->map = parent_task->map;
+
+ /* Chain the thread onto the task's list */
+ queue_enter(&parent_task->threads, new_thread, thread_act_t, task_threads);
+ parent_task->thread_count++;
+ parent_task->res_thread_count++;
+
+ /* So terminating threads don't need to take the task lock to decrement */
+ hw_atomic_add(&parent_task->active_thread_count, 1);
/* Associate the thread with the processor set */
- pset_add_thread(pset, new_shuttle);
+ pset_add_thread(pset, new_thread);
+
+ thread_timer_setup(new_thread);
/* Set the thread's scheduling parameters */
if (parent_task != kernel_task)
- new_shuttle->sched_mode |= TH_MODE_TIMESHARE;
- new_shuttle->max_priority = parent_task->max_priority;
- new_shuttle->task_priority = parent_task->priority;
- new_shuttle->priority = (priority < 0)? parent_task->priority: priority;
- if (new_shuttle->priority > new_shuttle->max_priority)
- new_shuttle->priority = new_shuttle->max_priority;
- new_shuttle->importance =
- new_shuttle->priority - new_shuttle->task_priority;
- new_shuttle->sched_stamp = sched_tick;
- compute_priority(new_shuttle, TRUE);
+ new_thread->sched_mode |= TH_MODE_TIMESHARE;
+ new_thread->max_priority = parent_task->max_priority;
+ new_thread->task_priority = parent_task->priority;
+ new_thread->priority = (priority < 0)? parent_task->priority: priority;
+ if (new_thread->priority > new_thread->max_priority)
+ new_thread->priority = new_thread->max_priority;
+ new_thread->importance =
+ new_thread->priority - new_thread->task_priority;
+ new_thread->sched_stamp = sched_tick;
+ compute_priority(new_thread, FALSE);
#if ETAP_EVENT_MONITOR
new_thread->etap_reason = 0;
new_thread->etap_trace = FALSE;
#endif /* ETAP_EVENT_MONITOR */
- new_shuttle->active = TRUE;
- thr_act->active = TRUE;
- pset_unlock(pset);
-
- /*
- * No need to lock thr_act, since it can't be known to anyone --
- * we set its suspend_count to one more than the task suspend_count
- * by calling thread_hold.
- */
- thr_act->user_stop_count = 1;
- for (suspcnt = thr_act->task->suspend_count + 1; suspcnt; --suspcnt)
- thread_hold(thr_act);
- task_unlock(parent_task);
+ new_thread->active = TRUE;
- *new_thread = new_shuttle;
+ *out_thread = new_thread;
{
- long dbg_arg1, dbg_arg2, dbg_arg3, dbg_arg4;
+ long dbg_arg1, dbg_arg2, dbg_arg3, dbg_arg4;
+
+ kdbg_trace_data(parent_task->bsd_info, &dbg_arg2);
+
+ KERNEL_DEBUG_CONSTANT(
+ TRACEDBG_CODE(DBG_TRACE_DATA, 1) | DBG_FUNC_NONE,
+ (vm_address_t)new_thread, dbg_arg2, 0, 0, 0);
- KERNEL_DEBUG_CONSTANT((TRACEDBG_CODE(DBG_TRACE_DATA, 1)) | DBG_FUNC_NONE,
- (vm_address_t)new_shuttle, 0,0,0,0);
+ kdbg_trace_string(parent_task->bsd_info,
+ &dbg_arg1, &dbg_arg2, &dbg_arg3, &dbg_arg4);
- kdbg_trace_string(parent_task->bsd_info, &dbg_arg1, &dbg_arg2, &dbg_arg3,
- &dbg_arg4);
- KERNEL_DEBUG_CONSTANT((TRACEDBG_CODE(DBG_TRACE_STRING, 1)) | DBG_FUNC_NONE,
- dbg_arg1, dbg_arg2, dbg_arg3, dbg_arg4, 0);
+ KERNEL_DEBUG_CONSTANT(
+ TRACEDBG_CODE(DBG_TRACE_STRING, 1) | DBG_FUNC_NONE,
+ dbg_arg1, dbg_arg2, dbg_arg3, dbg_arg4, 0);
}
return (KERN_SUCCESS);
}
+extern void thread_bootstrap_return(void);
+
kern_return_t
thread_create(
task_t task,
- thread_act_t *new_act)
+ thread_act_t *new_thread)
{
- thread_act_t thr_act;
- thread_t thread;
kern_return_t result;
- spl_t s;
- extern void thread_bootstrap_return(void);
+ thread_t thread;
- if (task == TASK_NULL)
- return KERN_INVALID_ARGUMENT;
+ if (task == TASK_NULL || task == kernel_task)
+ return (KERN_INVALID_ARGUMENT);
- result = act_create(task, &thr_act);
+ result = thread_create_internal(task, -1, thread_bootstrap_return, &thread);
if (result != KERN_SUCCESS)
return (result);
- result = thread_create_shuttle(thr_act, -1, thread_bootstrap_return, &thread);
- if (result != KERN_SUCCESS) {
- act_deallocate(thr_act);
- return (result);
- }
-
- if (task->kernel_loaded)
- thread_user_to_kernel(thread);
+ thread->user_stop_count = 1;
+ thread_hold(thread);
+ if (task->suspend_count > 0)
+ thread_hold(thread);
- /* Start the thread running (it will immediately suspend itself). */
- s = splsched();
- thread_ast_set(thr_act, AST_APC);
- thread_lock(thread);
- thread_go_locked(thread, THREAD_AWAKENED);
- thread_unlock(thread);
- splx(s);
+ pset_unlock(task->processor_set);
+ task_unlock(task);
- *new_act = thr_act;
+ *new_thread = thread;
return (KERN_SUCCESS);
}
-/*
- * Update thread that belongs to a task created via kernel_task_create().
- */
-void
-thread_user_to_kernel(
- thread_t thread)
-{
- /*
- * Used to set special swap_func here...
- */
-}
-
kern_return_t
thread_create_running(
- register task_t parent_task,
+ register task_t task,
int flavor,
thread_state_t new_state,
mach_msg_type_number_t new_state_count,
- thread_act_t *child_act) /* OUT */
+ thread_act_t *new_thread)
{
register kern_return_t result;
+ thread_t thread;
- result = thread_create(parent_task, child_act);
+ if (task == TASK_NULL || task == kernel_task)
+ return (KERN_INVALID_ARGUMENT);
+
+ result = thread_create_internal(task, -1, thread_bootstrap_return, &thread);
if (result != KERN_SUCCESS)
return (result);
- result = act_machine_set_state(*child_act, flavor,
- new_state, new_state_count);
+ result = machine_thread_set_state(thread, flavor, new_state, new_state_count);
if (result != KERN_SUCCESS) {
- (void) thread_terminate(*child_act);
- return (result);
- }
+ pset_unlock(task->processor_set);
+ task_unlock(task);
- result = thread_resume(*child_act);
- if (result != KERN_SUCCESS) {
- (void) thread_terminate(*child_act);
+ thread_terminate(thread);
+ act_deallocate(thread);
return (result);
}
+ act_lock(thread);
+ clear_wait(thread, THREAD_AWAKENED);
+ thread->started = TRUE;
+ act_unlock(thread);
+ pset_unlock(task->processor_set);
+ task_unlock(task);
+
+ *new_thread = thread;
+
return (result);
}
/*
* kernel_thread:
*
- * Create and kernel thread in the specified task, and
- * optionally start it running.
+ * Create a thread in the kernel task
+ * to execute in kernel context.
*/
thread_t
-kernel_thread_with_priority(
- task_t task,
- integer_t priority,
+kernel_thread_create(
void (*start)(void),
- boolean_t alloc_stack,
- boolean_t start_running)
+ integer_t priority)
{
kern_return_t result;
+ task_t task = kernel_task;
thread_t thread;
- thread_act_t thr_act;
- spl_t s;
- result = act_create(task, &thr_act);
- if (result != KERN_SUCCESS) {
- return THREAD_NULL;
- }
+ result = thread_create_internal(task, priority, start, &thread);
+ if (result != KERN_SUCCESS)
+ return (THREAD_NULL);
- result = thread_create_shuttle(thr_act, priority, start, &thread);
- if (result != KERN_SUCCESS) {
- act_deallocate(thr_act);
- return THREAD_NULL;
- }
+ pset_unlock(task->processor_set);
+ task_unlock(task);
- if (alloc_stack)
- thread_doswapin(thread);
+ thread_doswapin(thread);
+ assert(thread->kernel_stack != 0);
+ thread->reserved_stack = thread->kernel_stack;
- s = splsched();
- thread_lock(thread);
+ act_deallocate(thread);
- thr_act = thread->top_act;
-#if MACH_LDEBUG
- thread->kthread = TRUE;
-#endif /* MACH_LDEBUG */
+ return (thread);
+}
- if (start_running)
- thread_go_locked(thread, THREAD_AWAKENED);
+thread_t
+kernel_thread_with_priority(
+ void (*start)(void),
+ integer_t priority)
+{
+ thread_t thread;
- thread_unlock(thread);
- splx(s);
+ thread = kernel_thread_create(start, priority);
+ if (thread == THREAD_NULL)
+ return (THREAD_NULL);
- if (start_running)
- thread_resume(thr_act);
+ act_lock(thread);
+ clear_wait(thread, THREAD_AWAKENED);
+ thread->started = TRUE;
+ act_unlock(thread);
- act_deallocate(thr_act);
+#ifdef i386
+ thread_bind(thread, master_processor);
+#endif /* i386 */
return (thread);
}
task_t task,
void (*start)(void))
{
- return kernel_thread_with_priority(task, -1, start, FALSE, TRUE);
+ if (task != kernel_task)
+ panic("kernel_thread");
+
+ return kernel_thread_with_priority(start, -1);
}
unsigned int c_weird_pset_ref_exit = 0; /* pset code raced us */
+#if MACH_HOST
+/* Preclude thread processor set assignement */
+#define thread_freeze(thread) assert((thread)->processor_set == &default_pset)
+
+/* Allow thread processor set assignement */
+#define thread_unfreeze(thread) assert((thread)->processor_set == &default_pset)
+
+#endif /* MACH_HOST */
+
void
thread_deallocate(
thread_t thread)
{
task_t task;
processor_set_t pset;
+ int refs;
spl_t s;
if (thread == THREAD_NULL)
return;
/*
- * First, check for new count > 1 (the common case).
+ * First, check for new count > 0 (the common case).
* Only the thread needs to be locked.
*/
s = splsched();
thread_lock(thread);
- if (--thread->ref_count > 1) {
- thread_unlock(thread);
- splx(s);
+ refs = --thread->ref_count;
+ thread_unlock(thread);
+ splx(s);
+
+ if (refs > 0)
return;
- }
+
+ if (thread == current_thread())
+ panic("thread_deallocate");
/*
- * Down to pset reference, lets try to clean up.
- * However, the processor set may make more. Its lock
- * also dominate the thread lock. So, reverse the
- * order of the locks and see if its still the last
- * reference;
+ * There is a dangling pointer to the thread from the
+ * processor_set. To clean it up, we freeze the thread
+ * in the pset (because pset destruction can cause even
+ * reference-less threads to be reassigned to the default
+ * pset) and then remove it.
*/
- assert(thread->ref_count == 1); /* Else this is an extra dealloc! */
- thread_unlock(thread);
- splx(s);
-#if MACH_HOST
+#if MACH_HOST
thread_freeze(thread);
-#endif /* MACH_HOST */
+#endif
pset = thread->processor_set;
pset_lock(pset);
-
- s = splsched();
- thread_lock(thread);
-
- if (thread->ref_count > 1) {
-#if MACH_HOST
- boolean_t need_wakeup = FALSE;
- /*
- * processor_set made extra reference.
- */
- /* Inline the unfreeze */
- thread->may_assign = TRUE;
- if (thread->assign_active) {
- need_wakeup = TRUE;
- thread->assign_active = FALSE;
- }
-#endif /* MACH_HOST */
- thread_unlock(thread);
- splx(s);
- pset_unlock(pset);
-#if MACH_HOST
- if (need_wakeup)
- thread_wakeup((event_t)&thread->assign_active);
-#endif /* MACH_HOST */
- c_weird_pset_ref_exit++;
- return;
- }
-#if MACH_HOST
- assert(thread->assign_active == FALSE);
-#endif /* MACH_HOST */
-
- /*
- * Thread only had pset reference - we can remove it.
- */
- if (thread == current_thread())
- panic("thread deallocating itself");
-
pset_remove_thread(pset, thread);
- thread->ref_count = 0;
- thread_unlock(thread); /* no more references - safe */
- splx(s);
pset_unlock(pset);
- pset_deallocate(thread->processor_set);
+#if MACH_HOST
+ thread_unfreeze(thread);
+#endif
+
+ pset_deallocate(pset);
- if (thread->stack_privilege != 0) {
- if (thread->stack_privilege != thread->kernel_stack)
- stack_free_stack(thread->stack_privilege);
- thread->stack_privilege = 0;
+ if (thread->reserved_stack != 0) {
+ if (thread->reserved_stack != thread->kernel_stack)
+ stack_free_stack(thread->reserved_stack);
+ thread->reserved_stack = 0;
}
- /* frees kernel stack & other MD resources */
- thread_machine_destroy(thread);
- zfree(thread_shuttle_zone, (vm_offset_t) thread);
+ if (thread->kernel_stack != 0)
+ stack_free(thread);
+
+ machine_thread_destroy(thread);
+
+ zfree(thread_zone, (vm_offset_t) thread);
}
void
s = splsched();
thread_lock(thread);
- thread->ref_count++;
+ thread_reference_locked(thread);
thread_unlock(thread);
splx(s);
}
flags |= TH_FLAGS_SWAPPED;
state = 0;
- if (thread->state & TH_HALTED)
+ if (thread->state & TH_TERMINATE)
state = TH_STATE_HALTED;
else
if (thread->state & TH_RUN)
return (KERN_INVALID_POLICY);
}
- ts_info->base_priority = thread->priority;
- ts_info->max_priority = thread->max_priority;
- ts_info->cur_priority = thread->sched_pri;
+ ts_info->depressed = (thread->sched_mode & TH_MODE_ISDEPRESSED) != 0;
+ if (ts_info->depressed) {
+ ts_info->base_priority = DEPRESSPRI;
+ ts_info->depress_priority = thread->priority;
+ }
+ else {
+ ts_info->base_priority = thread->priority;
+ ts_info->depress_priority = -1;
+ }
- ts_info->depressed = (thread->depress_priority >= 0);
- ts_info->depress_priority = thread->depress_priority;
+ ts_info->cur_priority = thread->sched_pri;
+ ts_info->max_priority = thread->max_priority;
thread_unlock(thread);
splx(s);
return (KERN_INVALID_POLICY);
}
- rr_info->base_priority = thread->priority;
+ rr_info->depressed = (thread->sched_mode & TH_MODE_ISDEPRESSED) != 0;
+ if (rr_info->depressed) {
+ rr_info->base_priority = DEPRESSPRI;
+ rr_info->depress_priority = thread->priority;
+ }
+ else {
+ rr_info->base_priority = thread->priority;
+ rr_info->depress_priority = -1;
+ }
+
rr_info->max_priority = thread->max_priority;
rr_info->quantum = std_quantum_us / 1000;
- rr_info->depressed = (thread->depress_priority >= 0);
- rr_info->depress_priority = thread->depress_priority;
-
thread_unlock(thread);
splx(s);
register thread_t thread)
{
thread_act_t thr_act;
- struct ipc_port *pool_port;
thr_act = thread_lock_act(thread);
assert(thr_act && thr_act->thread == thread);
- act_locked_act_reference(thr_act);
- pool_port = thr_act->pool_port;
+ act_reference_locked(thr_act);
/*
* Replace `act_unlock_thread()' with individual
* to determine which locks are held, confusing
* `act_unlock_thread()'.)
*/
- rpc_unlock(thread);
- if (pool_port != IP_NULL)
- ip_unlock(pool_port);
act_unlock(thr_act);
/* Remove the reference held by a rooted thread */
- if (pool_port == IP_NULL)
- act_deallocate(thr_act);
+ act_deallocate(thr_act);
/* Remove the reference held by the thread: */
act_deallocate(thr_act);
}
-static thread_call_data_t thread_reaper_call_data;
-
/*
* reaper_thread:
*
- * This kernel thread runs forever looking for threads to destroy
- * (when they request that they be destroyed, of course).
- *
- * The reaper thread will disappear in the next revision of thread
- * control when it's function will be moved into thread_dispatch.
+ * This kernel thread runs forever looking for terminating
+ * threads, releasing their "self" references.
*/
static void
-_thread_reaper(
- thread_call_param_t p0,
- thread_call_param_t p1)
+reaper_thread_continue(void)
{
register thread_t thread;
- spl_t s;
- s = splsched();
+ (void)splsched();
simple_lock(&reaper_lock);
while ((thread = (thread_t) dequeue_head(&reaper_queue)) != THREAD_NULL) {
simple_unlock(&reaper_lock);
-
- /*
- * wait for run bit to clear
- */
- thread_lock(thread);
- if (thread->state & TH_RUN)
- panic("thread reaper: TH_RUN");
- thread_unlock(thread);
- splx(s);
+ (void)spllo();
thread_doreap(thread);
- s = splsched();
+ (void)splsched();
simple_lock(&reaper_lock);
}
+ assert_wait((event_t)&reaper_queue, THREAD_UNINT);
simple_unlock(&reaper_lock);
- splx(s);
+ (void)spllo();
+
+ thread_block(reaper_thread_continue);
+ /*NOTREACHED*/
}
-void
-thread_reaper(void)
+static void
+reaper_thread(void)
{
- thread_call_setup(&thread_reaper_call_data, _thread_reaper, NULL);
- thread_reaper_call = &thread_reaper_call_data;
+ reaper_thread_continue();
+ /*NOTREACHED*/
+}
- _thread_reaper(NULL, NULL);
+void
+thread_reaper_init(void)
+{
+ kernel_thread_with_priority(reaper_thread, MINPRI_KERNEL);
}
kern_return_t
thread_act_t thr_act,
processor_set_t new_pset)
{
-#ifdef lint
- thread++; new_pset++;
-#endif /* lint */
return(KERN_FAILURE);
}
}
/*
- * thread_wire:
+ * thread_wire_internal:
*
* Specify that the target thread must always be able
* to run and to allocate memory.
*/
kern_return_t
-thread_wire(
+thread_wire_internal(
host_priv_t host_priv,
thread_act_t thr_act,
- boolean_t wired)
+ boolean_t wired,
+ boolean_t *prev_state)
{
spl_t s;
thread_t thread;
/*
* This implementation only works for the current thread.
- * See stack_privilege.
*/
if (thr_act != current_act())
return KERN_INVALID_ARGUMENT;
s = splsched();
thread_lock(thread);
+ if (prev_state) {
+ *prev_state = thread->vm_privilege;
+ }
+
if (wired) {
if (thread->vm_privilege == FALSE)
vm_page_free_reserve(1); /* XXX */
return KERN_SUCCESS;
}
-/*
- * thread_collect_scan:
- *
- * Attempt to free resources owned by threads.
- */
-
-void
-thread_collect_scan(void)
-{
- /* This code runs very quickly! */
-}
-
-/* Also disabled in vm/vm_pageout.c */
-boolean_t thread_collect_allowed = FALSE;
-unsigned thread_collect_last_tick = 0;
-unsigned thread_collect_max_rate = 0; /* in ticks */
/*
- * consider_thread_collect:
+ * thread_wire:
*
- * Called by the pageout daemon when the system needs more free pages.
+ * User-api wrapper for thread_wire_internal()
*/
+kern_return_t
+thread_wire(
+ host_priv_t host_priv,
+ thread_act_t thr_act,
+ boolean_t wired)
-void
-consider_thread_collect(void)
{
- /*
- * By default, don't attempt thread collection more frequently
- * than once a second.
- */
-
- if (thread_collect_max_rate == 0)
- thread_collect_max_rate = (1 << SCHED_TICK_SHIFT) + 1;
-
- if (thread_collect_allowed &&
- (sched_tick >
- (thread_collect_last_tick + thread_collect_max_rate))) {
- thread_collect_last_tick = sched_tick;
- thread_collect_scan();
- }
+ return thread_wire_internal(host_priv, thr_act, wired, NULL);
}
kern_return_t
*reservedp = 0;
*totalp = total;
- *spacep = *residentp = total * round_page(KERNEL_STACK_SIZE);
+ *spacep = *residentp = total * round_page_32(KERNEL_STACK_SIZE);
*maxusagep = maxusage;
*maxstackp = 0;
return KERN_SUCCESS;
vm_size_t size, size_needed;
vm_offset_t addr;
+ spl_t s;
+
if (pset == PROCESSOR_SET_NULL)
return KERN_INVALID_ARGUMENT;
}
/* OK, have memory and the processor_set is locked & active */
-
+ s = splsched();
threads = (thread_t *) addr;
for (i = 0, thread = (thread_t) queue_first(&pset->threads);
- i < actual;
- i++,
+ !queue_end(&pset->threads, (queue_entry_t) thread);
thread = (thread_t) queue_next(&thread->pset_threads)) {
- thread_reference(thread);
- threads[i] = thread;
+ thread_lock(thread);
+ if (thread->ref_count > 0) {
+ thread_reference_locked(thread);
+ threads[i++] = thread;
+ }
+ thread_unlock(thread);
}
- assert(queue_end(&pset->threads, (queue_entry_t) thread));
+ splx(s);
+ assert(i <= actual);
/* can unlock processor set now that we have the thread refs */
pset_unlock(pset);
total = 0;
maxusage = 0;
maxstack = 0;
- for (i = 0; i < actual; i++) {
- int cpu;
- thread_t thread = threads[i];
- vm_offset_t stack = 0;
-
- /*
- * thread->kernel_stack is only accurate if the
- * thread isn't swapped and is not executing.
- *
- * Of course, we don't have the appropriate locks
- * for these shenanigans.
- */
-
- stack = thread->kernel_stack;
-
- for (cpu = 0; cpu < NCPUS; cpu++)
- if (cpu_data[cpu].active_thread == thread) {
- stack = active_stacks[cpu];
- break;
- }
+ while (i > 0) {
+ thread_t thread = threads[--i];
- if (stack != 0) {
+ if (thread->kernel_stack != 0)
total++;
- }
thread_deallocate(thread);
}
kfree(addr, size);
*totalp = total;
- *residentp = *spacep = total * round_page(KERNEL_STACK_SIZE);
+ *residentp = *spacep = total * round_page_32(KERNEL_STACK_SIZE);
*maxusagep = maxusage;
*maxstackp = maxstack;
return KERN_SUCCESS;
#endif /* MACH_DEBUG */
}
-static int split_funnel_off = 0;
+int split_funnel_off = 0;
funnel_t *
funnel_alloc(
int type)
fnl->fnl_mtxrelease = current_thread();
}
+int refunnel_hint_enabled = 0;
+
+boolean_t
+refunnel_hint(
+ thread_t thread,
+ wait_result_t wresult)
+{
+ if ( !(thread->funnel_state & TH_FN_REFUNNEL) ||
+ wresult != THREAD_AWAKENED )
+ return (FALSE);
+
+ if (!refunnel_hint_enabled)
+ return (FALSE);
+
+ return (mutex_preblock(thread->funnel_lock->fnl_mutex, thread));
+}
+
funnel_t *
thread_funnel_get(
void)
#undef thread_should_halt
boolean_t
thread_should_halt(
- thread_shuttle_t th)
+ thread_t th)
{
return(thread_should_halt_fast(th));
}
+vm_offset_t min_valid_stack_address(void)
+{
+ return vm_map_min(stack_map);
+}
+
+vm_offset_t max_valid_stack_address(void)
+{
+ return vm_map_max(stack_map);
+}
projects / apple / xnu.git / blobdiff