#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>
vm_offset_t active_stacks[NCPUS];
vm_offset_t kernel_stack[NCPUS];
thread_act_t active_kloaded[NCPUS];
boolean_t first_thread;
struct zone *thread_shuttle_zone;
queue_head_t reaper_queue;
decl_simple_lock_data(,reaper_lock)
extern int tick;
extern void pcb_module_init(void);
struct thread_shuttle pageout_thread;
static struct thread_shuttle thr_sh_template;
#if MACH_DEBUG
#ifdef MACHINE_STACK
extern void stack_statistics(
unsigned int *totalp,
vm_size_t *maxusagep);
#endif
#endif
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);
#ifdef MACHINE_STACK
#else
decl_simple_lock_data(,stack_lock_data)
#define stack_lock() simple_lock(&stack_lock_data)
#define stack_unlock() simple_unlock(&stack_lock_data)
mutex_t stack_map_lock;
vm_map_t stack_map;
vm_offset_t stack_free_list;
unsigned int stack_free_max = 0;
unsigned int stack_free_count = 0;
unsigned int stack_free_limit = 1;
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) {
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;
stack_attach(thread, stack, start_pos);
return (stack);
}
void
stack_free(
thread_t thread)
{
vm_offset_t stack = stack_detach(thread);
assert(stack);
if (stack != thread->stack_privilege) {
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();
}
}
static void
stack_free_stack(
vm_offset_t stack)
{
spl_t s;
s = splsched();
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)
{
vm_offset_t stack;
int i;
spl_t s;
s = splsched();
stack_lock();
while (stack_free_count > stack_free_limit) {
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);
}
#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)
{
if (thread != current_thread())
panic("stack_privilege");
if (thread->stack_privilege == 0)
thread->stack_privilege = current_stack();
}
boolean_t stack_alloc_try(
thread_t thread,
void (*start_pos)(thread_t))
{
register vm_offset_t stack = thread->stack_privilege;
if (stack == 0) {
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_attach(thread, stack, start_pos);
stack_alloc_hits++;
return (TRUE);
}
else {
stack_alloc_misses++;
return (FALSE);
}
}
uint64_t max_unsafe_computation;
extern int max_unsafe_quanta;
uint32_t sched_safe_duration;
uint64_t max_poll_computation;
extern int max_poll_quanta;
uint32_t std_quantum;
uint32_t min_std_quantum;
uint32_t max_rt_quantum;
uint32_t min_rt_quantum;
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),
"threads");
thr_sh_template.runq = RUN_QUEUE_NULL;
thr_sh_template.ref_count = 1;
thr_sh_template.reason = AST_NONE;
thr_sh_template.at_safe_point = FALSE;
thr_sh_template.wait_event = NO_EVENT64;
thr_sh_template.wait_queue = WAIT_QUEUE_NULL;
thr_sh_template.wait_result = THREAD_WAITING;
thr_sh_template.interrupt_level = THREAD_ABORTSAFE;
thr_sh_template.state = TH_STACK_HANDOFF | TH_WAIT | TH_UNINT;
thr_sh_template.wake_active = FALSE;
thr_sh_template.active_callout = FALSE;
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.max_priority = 0;
thr_sh_template.task_priority = 0;
thr_sh_template.promotions = 0;
thr_sh_template.pending_promoter_index = 0;
thr_sh_template.pending_promoter[0] =
thr_sh_template.pending_promoter[1] = NULL;
thr_sh_template.current_quantum = 0;
thr_sh_template.computation_metered = 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.bound_processor = PROCESSOR_NULL;
thr_sh_template.last_processor = PROCESSOR_NULL;
thr_sh_template.last_switch = 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;
thr_sh_template.processor_set = PROCESSOR_SET_NULL;
#if MACH_HOST
thr_sh_template.may_assign = TRUE;
thr_sh_template.assign_active = FALSE;
#endif
thr_sh_template.funnel_state = 0;
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);
if (KERNEL_STACK_SIZE < round_page(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
#if MACH_LDEBUG
thr_sh_template.mutex_count = 0;
#endif
{
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;
clock_interval_to_absolutetime_interval(250, NSEC_PER_USEC, &abstime);
assert((abstime >> 32) == 0 && (uint32_t)abstime != 0);
min_std_quantum = abstime;
clock_interval_to_absolutetime_interval(50, NSEC_PER_USEC, &abstime);
assert((abstime >> 32) == 0 && (uint32_t)abstime != 0);
min_rt_quantum = abstime;
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);
}
first_thread = TRUE;
thread_machine_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_act_count, 1);
if (active_acts == 0 && task->bsd_info)
proc_exit(task->bsd_info);
assert(!thr_act->lower);
s = splsched();
thread_lock(thread);
thread->active = FALSE;
thread_unlock(thread);
splx(s);
thread_timer_terminate();
thread_machine_flush(thr_act);
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);
}
kern_return_t
thread_create_shuttle(
thread_act_t thr_act,
integer_t priority,
void (*start)(void),
thread_t *new_thread)
{
kern_return_t result;
thread_t new_shuttle;
task_t parent_task = thr_act->task;
processor_set_t pset;
if (first_thread) {
new_shuttle = &pageout_thread;
first_thread = FALSE;
} else
new_shuttle = (thread_t)zalloc(thread_shuttle_zone);
if (new_shuttle == THREAD_NULL)
return (KERN_RESOURCE_SHORTAGE);
#ifdef DEBUG
if (new_shuttle != &pageout_thread)
assert(!thr_act->thread);
#endif
*new_shuttle = thr_sh_template;
thread_lock_init(new_shuttle);
wake_lock_init(new_shuttle);
new_shuttle->sleep_stamp = sched_tick;
result = thread_machine_create(new_shuttle, thr_act, thread_continue);
assert (result == KERN_SUCCESS);
thread_start(new_shuttle, start);
thread_timer_setup(new_shuttle);
ipc_thread_init(new_shuttle);
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) {
task_unlock(parent_task);
pset_unlock(pset);
thread_machine_destroy(new_shuttle);
zfree(thread_shuttle_zone, (vm_offset_t) new_shuttle);
return (KERN_FAILURE);
}
act_attach(thr_act, new_shuttle, 0);
queue_enter(&parent_task->thr_acts, thr_act, thread_act_t, thr_acts);
parent_task->thr_act_count++;
parent_task->res_act_count++;
hw_atomic_add(&parent_task->active_act_count, 1);
pset_add_thread(pset, new_shuttle);
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, FALSE);
#if ETAP_EVENT_MONITOR
new_thread->etap_reason = 0;
new_thread->etap_trace = FALSE;
#endif
new_shuttle->active = TRUE;
thr_act->active = TRUE;
*new_thread = new_shuttle;
{
long dbg_arg1, dbg_arg2, dbg_arg3, dbg_arg4;
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);
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)
{
kern_return_t result;
thread_t thread;
thread_act_t act;
if (task == TASK_NULL)
return KERN_INVALID_ARGUMENT;
result = act_create(task, &act);
if (result != KERN_SUCCESS)
return (result);
result = thread_create_shuttle(act, -1, thread_bootstrap_return, &thread);
if (result != KERN_SUCCESS) {
act_deallocate(act);
return (result);
}
act->user_stop_count = 1;
thread_hold(act);
if (task->suspend_count > 0)
thread_hold(act);
pset_unlock(task->processor_set);
task_unlock(task);
*new_act = act;
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_act)
{
register kern_return_t result;
thread_t thread;
thread_act_t act;
if (task == TASK_NULL)
return KERN_INVALID_ARGUMENT;
result = act_create(task, &act);
if (result != KERN_SUCCESS)
return (result);
result = thread_create_shuttle(act, -1, thread_bootstrap_return, &thread);
if (result != KERN_SUCCESS) {
act_deallocate(act);
return (result);
}
act_lock(act);
result = act_machine_set_state(act, flavor, new_state, new_state_count);
if (result != KERN_SUCCESS) {
act_unlock(act);
pset_unlock(task->processor_set);
task_unlock(task);
(void)thread_terminate(act);
return (result);
}
clear_wait(thread, THREAD_AWAKENED);
act->inited = TRUE;
act_unlock(act);
pset_unlock(task->processor_set);
task_unlock(task);
*new_act = act;
return (result);
}
thread_t
kernel_thread_with_priority(
task_t task,
integer_t priority,
void (*start)(void),
boolean_t alloc_stack,
boolean_t start_running)
{
kern_return_t result;
thread_t thread;
thread_act_t act;
result = act_create(task, &act);
if (result != KERN_SUCCESS)
return (THREAD_NULL);
result = thread_create_shuttle(act, priority, start, &thread);
if (result != KERN_SUCCESS) {
act_deallocate(act);
return (THREAD_NULL);
}
pset_unlock(task->processor_set);
task_unlock(task);
if (alloc_stack)
thread_doswapin(thread);
act_lock(act);
if (start_running)
clear_wait(thread, THREAD_AWAKENED);
act->inited = TRUE;
act_unlock(act);
act_deallocate(act);
return (thread);
}
thread_t
kernel_thread(
task_t task,
void (*start)(void))
{
return kernel_thread_with_priority(task, -1, start, FALSE, TRUE);
}
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 deallocating itself");
#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->stack_privilege != 0) {
if (thread->stack_privilege != thread->kernel_stack)
stack_free_stack(thread->stack_privilege);
thread->stack_privilege = 0;
}
thread_machine_destroy(thread);
zfree(thread_shuttle_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_locked_act_reference(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)
{
thread_t self = current_thread();
stack_privilege(self);
reaper_thread_continue();
}
void
thread_reaper_init(void)
{
kernel_thread(kernel_task, reaper_thread);
}
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(
host_priv_t host_priv,
thread_act_t thr_act,
boolean_t wired)
{
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 (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;
}
void
thread_collect_scan(void)
{
}
boolean_t thread_collect_allowed = FALSE;
unsigned thread_collect_last_tick = 0;
unsigned thread_collect_max_rate = 0;
void
consider_thread_collect(void)
{
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();
}
}
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(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) {
int cpu;
thread_t thread = threads[--i];
vm_offset_t stack = 0;
stack = thread->kernel_stack;
for (cpu = 0; cpu < NCPUS; cpu++)
if (cpu_to_processor(cpu)->cpu_data->active_thread == thread) {
stack = active_stacks[cpu];
break;
}
if (stack != 0) {
total++;
}
thread_deallocate(thread);
}
if (size != 0)
kfree(addr, size);
*totalp = total;
*residentp = *spacep = total * round_page(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();
}
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_shuttle_t th)
{
return(thread_should_halt_fast(th));
}