#include <cpus.h>
#include <mach_host.h>
#include <simple_clock.h>
#include <mach_debug.h>
#include <mach_prof.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 <kern/ast.h>
#include <kern/cpu_data.h>
#include <kern/counters.h>
#include <kern/etap_macros.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/mk_sp.h>
#include <kern/task.h>
#include <kern/thread.h>
#include <kern/thread_act.h>
#include <kern/thread_swap.h>
#include <kern/host.h>
#include <kern/zalloc.h>
#include <vm/vm_kern.h>
#include <ipc/ipc_kmsg.h>
#include <ipc/ipc_port.h>
#include <machine/thread.h>
#include <kern/profile.h>
#include <kern/assert.h>
#include <sys/kdebug.h>
#include <mach/thread_act_server.h>
#include <mach/mach_host_server.h>
static struct zone *thread_zone;
static queue_head_t reaper_queue;
decl_simple_lock_data(static,reaper_lock)
extern int tick;
static struct thread thread_template, init_thread;
#if MACH_DEBUG
#ifdef MACHINE_STACK
extern void stack_statistics(
unsigned int *totalp,
vm_size_t *maxusagep);
#endif
#endif
#ifdef MACHINE_STACK
#else
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];
unsigned int stack_free_max = 0;
unsigned int stack_free_count = 0;
unsigned int stack_free_limit = 1;
unsigned int stack_cache_hits = 0;
unsigned int stack_alloc_hits = 0;
unsigned int stack_alloc_misses = 0;
unsigned int stack_alloc_total = 0;
unsigned int stack_alloc_hiwater = 0;
unsigned int stack_alloc_bndry = 0;
#define stack_next(stack) (*((vm_offset_t *)((stack) + KERNEL_STACK_SIZE) - 1))
vm_offset_t
stack_alloc(
thread_t thread,
void (*start_pos)(thread_t))
{
vm_offset_t stack = thread->kernel_stack;
spl_t s;
if (stack)
return (stack);
s = splsched();
stack_lock();
stack = stack_free_list;
if (stack != 0) {
stack_free_list = stack_next(stack);
stack_free_count--;
}
stack_unlock();
splx(s);
if (stack != 0) {
machine_stack_attach(thread, stack, start_pos);
return (stack);
}
if (kernel_memory_allocate(
stack_map, &stack,
KERNEL_STACK_SIZE, stack_alloc_bndry - 1,
KMA_KOBJECT) != KERN_SUCCESS)
panic("stack_alloc: no space left for stack maps");
stack_alloc_total++;
if (stack_alloc_total > stack_alloc_hiwater)
stack_alloc_hiwater = stack_alloc_total;
machine_stack_attach(thread, stack, start_pos);
return (stack);
}
void
stack_free(
thread_t thread)
{
vm_offset_t stack = machine_stack_detach(thread);
assert(stack);
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);
}
}
void
stack_free_stack(
vm_offset_t 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);
}
void
stack_collect(void)
{
spl_t s = splsched();
stack_lock();
while (stack_free_count > stack_free_limit) {
vm_offset_t stack = stack_free_list;
stack_free_list = stack_next(stack);
stack_free_count--;
stack_unlock();
splx(s);
if (vm_map_remove(
stack_map, stack, stack + KERNEL_STACK_SIZE,
VM_MAP_REMOVE_KUNWIRE) != KERN_SUCCESS)
panic("stack_collect: vm_map_remove failed");
s = splsched();
stack_lock();
stack_alloc_total--;
}
stack_unlock();
splx(s);
}
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
void
stack_statistics(
unsigned int *totalp,
vm_size_t *maxusagep)
{
spl_t s;
s = splsched();
stack_lock();
*totalp = stack_free_count;
*maxusagep = 0;
stack_unlock();
splx(s);
}
#endif
#endif
stack_fake_zone_info(int *count, vm_size_t *cur_size, vm_size_t *max_size, vm_size_t *elem_size,
vm_size_t *alloc_size, int *collectable, int *exhaustable)
{
*count = stack_alloc_total - stack_free_count;
*cur_size = KERNEL_STACK_SIZE * stack_alloc_total;
*max_size = KERNEL_STACK_SIZE * stack_alloc_hiwater;
*elem_size = KERNEL_STACK_SIZE;
*alloc_size = KERNEL_STACK_SIZE;
*collectable = 1;
*exhaustable = 0;
}
void
stack_privilege(
register thread_t thread)
{
}
void
thread_bootstrap(void)
{
thread_template.runq = RUN_QUEUE_NULL;
thread_template.ref_count = 1;
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;
thread_template.importance = 0;
thread_template.sched_mode = 0;
thread_template.safe_mode = 0;
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;
thread_template.realtime.deadline = UINT64_MAX;
thread_template.current_quantum = 0;
thread_template.computation_metered = 0;
thread_template.computation_epoch = 0;
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;
thread_template.bound_processor = PROCESSOR_NULL;
thread_template.last_processor = PROCESSOR_NULL;
thread_template.last_switch = 0;
thread_template.vm_privilege = FALSE;
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;
thread_template.processor_set = PROCESSOR_SET_NULL;
thread_template.act_ref_count = 2;
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
thread_template.funnel_lock = THR_FUNNEL_NULL;
thread_template.funnel_state = 0;
#if MACH_LDEBUG
thread_template.mutex_count = 0;
#endif
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_zone = zinit(
sizeof(struct thread),
THREAD_MAX * sizeof(struct thread),
THREAD_CHUNK * sizeof(struct thread),
"threads");
queue_init(&reaper_queue);
simple_lock_init(&reaper_lock, ETAP_THREAD_REAPER);
#ifndef MACHINE_STACK
simple_lock_init(&stack_lock_data, ETAP_THREAD_STACK);
if (KERNEL_STACK_SIZE < round_page_32(KERNEL_STACK_SIZE)) {
panic("thread_init: kernel stack size (%08X) must be a multiple of page size (%08X)\n",
KERNEL_STACK_SIZE, PAGE_SIZE);
}
for(stack_alloc_bndry = PAGE_SIZE; stack_alloc_bndry <= KERNEL_STACK_SIZE; stack_alloc_bndry <<= 1);
ret = kmem_suballoc(kernel_map,
&stack,
(stack_alloc_bndry * (2*THREAD_MAX + 64)),
FALSE,
TRUE,
&stack_map);
if(ret != KERN_SUCCESS) {
panic("thread_init: kmem_suballoc for stacks failed - ret = %d\n", ret);
}
stack = vm_map_min(stack_map);
ret = vm_map_enter(stack_map, &stack, PAGE_SIZE, 0,
0,
VM_OBJECT_NULL, 0,
FALSE,
VM_PROT_NONE,
VM_PROT_NONE,
VM_INHERIT_DEFAULT);
if(ret != KERN_SUCCESS) {
panic("thread_init: dummy alignment allocation failed; ret = %d\n", ret);
}
#endif
machine_thread_init();
}
void
thread_reaper_enqueue(
thread_t thread)
{
simple_lock(&reaper_lock);
enqueue_tail(&reaper_queue, (queue_entry_t)thread);
simple_unlock(&reaper_lock);
thread_wakeup((event_t)&reaper_queue);
}
void
thread_termination_continue(void)
{
panic("thread_termination_continue");
}
void
thread_terminate_self(void)
{
thread_act_t thr_act = current_act();
thread_t thread;
task_t task = thr_act->task;
long active_acts;
spl_t s;
thread = act_lock_thread(thr_act);
assert(thr_act->thread == thread);
ipc_thr_act_disable(thr_act);
act_ulock_release_all(thr_act);
act_unlock_thread(thr_act);
_mk_sp_thread_depress_abort(thread, TRUE);
active_acts = hw_atomic_sub(&task->active_thread_count, 1);
if (active_acts == 0 && task->bsd_info)
proc_exit(task->bsd_info);
assert(!thr_act->lower);
thread_timer_terminate();
ipc_thread_terminate(thread);
s = splsched();
thread_lock(thread);
thread->state |= TH_TERMINATE;
assert((thread->state & TH_UNINT) == 0);
thread_mark_wait_locked(thread, THREAD_UNINT);
assert(thread->promotions == 0);
thread_unlock(thread);
ETAP_SET_REASON(thread, BLOCKED_ON_TERMINATION);
thread_block(thread_termination_continue);
}
static kern_return_t
thread_create_internal(
task_t parent_task,
integer_t priority,
void (*start)(void),
thread_t *out_thread)
{
thread_t new_thread;
processor_set_t pset;
static thread_t first_thread;
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);
if (new_thread != first_thread)
*new_thread = thread_template;
#ifdef MACH_BSD
{
extern void *uthread_alloc(task_t, thread_act_t);
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
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;
new_thread->uthread = NULL;
uthread_free(parent_task, (void *)new_thread, ut, parent_task->bsd_info);
}
#endif
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);
if ( !parent_task->active ||
(parent_task->thread_count >= THREAD_MAX &&
parent_task != kernel_task)) {
task_unlock(parent_task);
pset_unlock(pset);
#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
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(new_thread, new_thread);
task_reference_locked(parent_task);
new_thread->map = parent_task->map;
queue_enter(&parent_task->threads, new_thread, thread_act_t, task_threads);
parent_task->thread_count++;
parent_task->res_thread_count++;
hw_atomic_add(&parent_task->active_thread_count, 1);
pset_add_thread(pset, new_thread);
thread_timer_setup(new_thread);
if (parent_task != kernel_task)
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
new_thread->active = TRUE;
*out_thread = new_thread;
{
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);
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);
}
return (KERN_SUCCESS);
}
extern void thread_bootstrap_return(void);
kern_return_t
thread_create(
task_t task,
thread_act_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_bootstrap_return, &thread);
if (result != KERN_SUCCESS)
return (result);
thread->user_stop_count = 1;
thread_hold(thread);
if (task->suspend_count > 0)
thread_hold(thread);
pset_unlock(task->processor_set);
task_unlock(task);
*new_thread = thread;
return (KERN_SUCCESS);
}
kern_return_t
thread_create_running(
register task_t task,
int flavor,
thread_state_t new_state,
mach_msg_type_number_t new_state_count,
thread_act_t *new_thread)
{
register 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_bootstrap_return, &thread);
if (result != KERN_SUCCESS)
return (result);
result = machine_thread_set_state(thread, flavor, new_state, new_state_count);
if (result != KERN_SUCCESS) {
pset_unlock(task->processor_set);
task_unlock(task);
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);
}
thread_t
kernel_thread_create(
void (*start)(void),
integer_t priority)
{
kern_return_t result;
task_t task = kernel_task;
thread_t thread;
result = thread_create_internal(task, priority, start, &thread);
if (result != KERN_SUCCESS)
return (THREAD_NULL);
pset_unlock(task->processor_set);
task_unlock(task);
thread_doswapin(thread);
assert(thread->kernel_stack != 0);
thread->reserved_stack = thread->kernel_stack;
act_deallocate(thread);
return (thread);
}
thread_t
kernel_thread_with_priority(
void (*start)(void),
integer_t priority)
{
thread_t thread;
thread = kernel_thread_create(start, priority);
if (thread == THREAD_NULL)
return (THREAD_NULL);
act_lock(thread);
clear_wait(thread, THREAD_AWAKENED);
thread->started = TRUE;
act_unlock(thread);
#ifdef i386
thread_bind(thread, master_processor);
#endif
return (thread);
}
thread_t
kernel_thread(
task_t task,
void (*start)(void))
{
if (task != kernel_task)
panic("kernel_thread");
return kernel_thread_with_priority(start, -1);
}
unsigned int c_weird_pset_ref_exit = 0;
#if MACH_HOST
#define thread_freeze(thread) assert((thread)->processor_set == &default_pset)
#define thread_unfreeze(thread) assert((thread)->processor_set == &default_pset)
#endif
void
thread_deallocate(
thread_t thread)
{
task_t task;
processor_set_t pset;
int refs;
spl_t s;
if (thread == THREAD_NULL)
return;
s = splsched();
thread_lock(thread);
refs = --thread->ref_count;
thread_unlock(thread);
splx(s);
if (refs > 0)
return;
if (thread == current_thread())
panic("thread_deallocate");
#if MACH_HOST
thread_freeze(thread);
#endif
pset = thread->processor_set;
pset_lock(pset);
pset_remove_thread(pset, thread);
pset_unlock(pset);
#if MACH_HOST
thread_unfreeze(thread);
#endif
pset_deallocate(pset);
if (thread->reserved_stack != 0) {
if (thread->reserved_stack != thread->kernel_stack)
stack_free_stack(thread->reserved_stack);
thread->reserved_stack = 0;
}
if (thread->kernel_stack != 0)
stack_free(thread);
machine_thread_destroy(thread);
zfree(thread_zone, (vm_offset_t) thread);
}
void
thread_reference(
thread_t thread)
{
spl_t s;
if (thread == THREAD_NULL)
return;
s = splsched();
thread_lock(thread);
thread_reference_locked(thread);
thread_unlock(thread);
splx(s);
}
kern_return_t
thread_info_shuttle(
register thread_act_t thr_act,
thread_flavor_t flavor,
thread_info_t thread_info_out,
mach_msg_type_number_t *thread_info_count)
{
register thread_t thread = thr_act->thread;
int state, flags;
spl_t s;
if (thread == THREAD_NULL)
return (KERN_INVALID_ARGUMENT);
if (flavor == THREAD_BASIC_INFO) {
register thread_basic_info_t basic_info;
if (*thread_info_count < THREAD_BASIC_INFO_COUNT)
return (KERN_INVALID_ARGUMENT);
basic_info = (thread_basic_info_t) thread_info_out;
s = splsched();
thread_lock(thread);
thread_read_times(thread, &basic_info->user_time,
&basic_info->system_time);
if (thread->sched_stamp != sched_tick)
update_priority(thread);
basic_info->sleep_time = 0;
basic_info->cpu_usage = (thread->cpu_usage << SCHED_TICK_SHIFT) /
(TIMER_RATE / TH_USAGE_SCALE);
basic_info->cpu_usage = (basic_info->cpu_usage * 3) / 5;
#if SIMPLE_CLOCK
basic_info->cpu_usage = (basic_info->cpu_usage * 1000000) / sched_usec;
#endif
basic_info->policy = ((thread->sched_mode & TH_MODE_TIMESHARE)?
POLICY_TIMESHARE: POLICY_RR);
flags = 0;
if (thread->state & TH_IDLE)
flags |= TH_FLAGS_IDLE;
if (thread->state & TH_STACK_HANDOFF)
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 = thr_act->user_stop_count;
thread_unlock(thread);
splx(s);
*thread_info_count = THREAD_BASIC_INFO_COUNT;
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_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->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;
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_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;
thread_unlock(thread);
splx(s);
*thread_info_count = POLICY_RR_INFO_COUNT;
return (KERN_SUCCESS);
}
return (KERN_INVALID_ARGUMENT);
}
void
thread_doreap(
register thread_t thread)
{
thread_act_t thr_act;
thr_act = thread_lock_act(thread);
assert(thr_act && thr_act->thread == thread);
act_reference_locked(thr_act);
act_unlock(thr_act);
act_deallocate(thr_act);
act_deallocate(thr_act);
}
static void
reaper_thread_continue(void)
{
register thread_t thread;
(void)splsched();
simple_lock(&reaper_lock);
while ((thread = (thread_t) dequeue_head(&reaper_queue)) != THREAD_NULL) {
simple_unlock(&reaper_lock);
(void)spllo();
thread_doreap(thread);
(void)splsched();
simple_lock(&reaper_lock);
}
assert_wait((event_t)&reaper_queue, THREAD_UNINT);
simple_unlock(&reaper_lock);
(void)spllo();
thread_block(reaper_thread_continue);
}
static void
reaper_thread(void)
{
reaper_thread_continue();
}
void
thread_reaper_init(void)
{
kernel_thread_with_priority(reaper_thread, MINPRI_KERNEL);
}
kern_return_t
thread_assign(
thread_act_t thr_act,
processor_set_t new_pset)
{
return(KERN_FAILURE);
}
kern_return_t
thread_assign_default(
thread_act_t thr_act)
{
return (thread_assign(thr_act, &default_pset));
}
kern_return_t
thread_get_assignment(
thread_act_t thr_act,
processor_set_t *pset)
{
thread_t thread;
if (thr_act == THR_ACT_NULL)
return(KERN_INVALID_ARGUMENT);
thread = act_lock_thread(thr_act);
if (thread == THREAD_NULL) {
act_unlock_thread(thr_act);
return(KERN_INVALID_ARGUMENT);
}
*pset = thread->processor_set;
act_unlock_thread(thr_act);
pset_reference(*pset);
return(KERN_SUCCESS);
}
kern_return_t
thread_wire_internal(
host_priv_t host_priv,
thread_act_t thr_act,
boolean_t wired,
boolean_t *prev_state)
{
spl_t s;
thread_t thread;
extern void vm_page_free_reserve(int pages);
if (thr_act == THR_ACT_NULL || host_priv == HOST_PRIV_NULL)
return (KERN_INVALID_ARGUMENT);
assert(host_priv == &realhost);
thread = act_lock_thread(thr_act);
if (thread ==THREAD_NULL) {
act_unlock_thread(thr_act);
return(KERN_INVALID_ARGUMENT);
}
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);
thread->vm_privilege = TRUE;
} else {
if (thread->vm_privilege == TRUE)
vm_page_free_reserve(-1);
thread->vm_privilege = FALSE;
}
thread_unlock(thread);
splx(s);
act_unlock_thread(thr_act);
return KERN_SUCCESS;
}
kern_return_t
thread_wire(
host_priv_t host_priv,
thread_act_t thr_act,
boolean_t wired)
{
return thread_wire_internal(host_priv, thr_act, wired, NULL);
}
kern_return_t
host_stack_usage(
host_t host,
vm_size_t *reservedp,
unsigned int *totalp,
vm_size_t *spacep,
vm_size_t *residentp,
vm_size_t *maxusagep,
vm_offset_t *maxstackp)
{
#if !MACH_DEBUG
return KERN_NOT_SUPPORTED;
#else
unsigned int total;
vm_size_t maxusage;
if (host == HOST_NULL)
return KERN_INVALID_HOST;
maxusage = 0;
stack_statistics(&total, &maxusage);
*reservedp = 0;
*totalp = total;
*spacep = *residentp = total * round_page_32(KERNEL_STACK_SIZE);
*maxusagep = maxusage;
*maxstackp = 0;
return KERN_SUCCESS;
#endif
}
kern_return_t
processor_set_stack_usage(
processor_set_t pset,
unsigned int *totalp,
vm_size_t *spacep,
vm_size_t *residentp,
vm_size_t *maxusagep,
vm_offset_t *maxstackp)
{
#if !MACH_DEBUG
return KERN_NOT_SUPPORTED;
#else
unsigned int total;
vm_size_t maxusage;
vm_offset_t maxstack;
register thread_t *threads;
register thread_t thread;
unsigned int actual;
unsigned int i;
vm_size_t size, size_needed;
vm_offset_t addr;
spl_t s;
if (pset == PROCESSOR_SET_NULL)
return KERN_INVALID_ARGUMENT;
size = 0; addr = 0;
for (;;) {
pset_lock(pset);
if (!pset->active) {
pset_unlock(pset);
return KERN_INVALID_ARGUMENT;
}
actual = pset->thread_count;
size_needed = actual * sizeof(thread_t);
if (size_needed <= size)
break;
pset_unlock(pset);
if (size != 0)
kfree(addr, size);
assert(size_needed > 0);
size = size_needed;
addr = kalloc(size);
if (addr == 0)
return KERN_RESOURCE_SHORTAGE;
}
s = splsched();
threads = (thread_t *) addr;
for (i = 0, thread = (thread_t) queue_first(&pset->threads);
!queue_end(&pset->threads, (queue_entry_t) thread);
thread = (thread_t) queue_next(&thread->pset_threads)) {
thread_lock(thread);
if (thread->ref_count > 0) {
thread_reference_locked(thread);
threads[i++] = thread;
}
thread_unlock(thread);
}
splx(s);
assert(i <= actual);
pset_unlock(pset);
total = 0;
maxusage = 0;
maxstack = 0;
while (i > 0) {
thread_t thread = threads[--i];
if (thread->kernel_stack != 0)
total++;
thread_deallocate(thread);
}
if (size != 0)
kfree(addr, size);
*totalp = total;
*residentp = *spacep = total * round_page_32(KERNEL_STACK_SIZE);
*maxusagep = maxusage;
*maxstackp = maxstack;
return KERN_SUCCESS;
#endif
}
int split_funnel_off = 0;
funnel_t *
funnel_alloc(
int type)
{
mutex_t *m;
funnel_t * fnl;
if ((fnl = (funnel_t *)kalloc(sizeof(funnel_t))) != 0){
bzero((void *)fnl, sizeof(funnel_t));
if ((m = mutex_alloc(0)) == (mutex_t *)NULL) {
kfree((vm_offset_t)fnl, sizeof(funnel_t));
return(THR_FUNNEL_NULL);
}
fnl->fnl_mutex = m;
fnl->fnl_type = type;
}
return(fnl);
}
void
funnel_free(
funnel_t * fnl)
{
mutex_free(fnl->fnl_mutex);
if (fnl->fnl_oldmutex)
mutex_free(fnl->fnl_oldmutex);
kfree((vm_offset_t)fnl, sizeof(funnel_t));
}
void
funnel_lock(
funnel_t * fnl)
{
mutex_t * m;
m = fnl->fnl_mutex;
restart:
mutex_lock(m);
fnl->fnl_mtxholder = current_thread();
if (split_funnel_off && (m != fnl->fnl_mutex)) {
mutex_unlock(m);
m = fnl->fnl_mutex;
goto restart;
}
}
void
funnel_unlock(
funnel_t * fnl)
{
mutex_unlock(fnl->fnl_mutex);
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)
{
thread_t th = current_thread();
if (th->funnel_state & TH_FN_OWNED) {
return(th->funnel_lock);
}
return(THR_FUNNEL_NULL);
}
boolean_t
thread_funnel_set(
funnel_t * fnl,
boolean_t funneled)
{
thread_t cur_thread;
boolean_t funnel_state_prev;
boolean_t intr;
cur_thread = current_thread();
funnel_state_prev = ((cur_thread->funnel_state & TH_FN_OWNED) == TH_FN_OWNED);
if (funnel_state_prev != funneled) {
intr = ml_set_interrupts_enabled(FALSE);
if (funneled == TRUE) {
if (cur_thread->funnel_lock)
panic("Funnel lock called when holding one %x", cur_thread->funnel_lock);
KERNEL_DEBUG(0x6032428 | DBG_FUNC_NONE,
fnl, 1, 0, 0, 0);
funnel_lock(fnl);
KERNEL_DEBUG(0x6032434 | DBG_FUNC_NONE,
fnl, 1, 0, 0, 0);
cur_thread->funnel_state |= TH_FN_OWNED;
cur_thread->funnel_lock = fnl;
} else {
if(cur_thread->funnel_lock->fnl_mutex != fnl->fnl_mutex)
panic("Funnel unlock when not holding funnel");
cur_thread->funnel_state &= ~TH_FN_OWNED;
KERNEL_DEBUG(0x603242c | DBG_FUNC_NONE,
fnl, 1, 0, 0, 0);
cur_thread->funnel_lock = THR_FUNNEL_NULL;
funnel_unlock(fnl);
}
(void)ml_set_interrupts_enabled(intr);
} else {
if (funneled && (fnl->fnl_mutex != cur_thread->funnel_lock->fnl_mutex)) {
panic("thread_funnel_set: already holding a different funnel");
}
}
return(funnel_state_prev);
}
boolean_t
thread_funnel_merge(
funnel_t * fnl,
funnel_t * otherfnl)
{
mutex_t * m;
mutex_t * otherm;
funnel_t * gfnl;
extern int disable_funnel;
if ((gfnl = thread_funnel_get()) == THR_FUNNEL_NULL)
panic("thread_funnel_merge called with no funnels held");
if (gfnl->fnl_type != 1)
panic("thread_funnel_merge called from non kernel funnel");
if (gfnl != fnl)
panic("thread_funnel_merge incorrect invocation");
if (disable_funnel || split_funnel_off)
return (KERN_FAILURE);
m = fnl->fnl_mutex;
otherm = otherfnl->fnl_mutex;
mutex_lock(otherm);
split_funnel_off = 1;
disable_funnel = 1;
otherfnl->fnl_mutex = m;
otherfnl->fnl_type = fnl->fnl_type;
otherfnl->fnl_oldmutex = otherm;
mutex_unlock(otherm);
return(KERN_SUCCESS);
}
void
thread_set_cont_arg(
int arg)
{
thread_t self = current_thread();
self->saved.misc = arg;
}
int
thread_get_cont_arg(void)
{
thread_t self = current_thread();
return (self->saved.misc);
}
#undef thread_should_halt
boolean_t
thread_should_halt(
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);
}