/*
- * Copyright (c) 2000-2007 Apple Inc. All rights reserved.
+ * Copyright (c) 2000-2010 Apple Inc. All rights reserved.
*
* @APPLE_OSREFERENCE_LICENSE_HEADER_START@
*
* Copyright (c) 2005 SPARTA, Inc.
*/
-#include <mach_kdb.h>
#include <fast_tas.h>
#include <platforms.h>
#include <kern/processor.h>
#include <kern/sched_prim.h> /* for thread_wakeup */
#include <kern/ipc_tt.h>
-#include <kern/ledger.h>
#include <kern/host.h>
#include <kern/clock.h>
#include <kern/timer.h>
#include <vm/vm_pageout.h>
#include <vm/vm_protos.h>
-#if MACH_KDB
-#include <ddb/db_sym.h>
-#endif /* MACH_KDB */
-
-#ifdef __ppc__
-#include <ppc/exception.h>
-#include <ppc/hw_perfmon.h>
-#endif
-
/*
* Exported interfaces
*/
#include <security/mac_mach_internal.h>
#endif
-task_t kernel_task;
-zone_t task_zone;
+#if CONFIG_COUNTERS
+#include <pmc/pmc.h>
+#endif /* CONFIG_COUNTERS */
+
+task_t kernel_task;
+zone_t task_zone;
+lck_attr_t task_lck_attr;
+lck_grp_t task_lck_grp;
+lck_grp_attr_t task_lck_grp_attr;
+#if CONFIG_EMBEDDED
+lck_mtx_t task_watch_mtx;
+#endif /* CONFIG_EMBEDDED */
+
+zinfo_usage_store_t tasks_tkm_private;
+zinfo_usage_store_t tasks_tkm_shared;
+
+static ledger_template_t task_ledger_template = NULL;
+struct _task_ledger_indices task_ledgers = {-1, -1, -1, -1, -1};
+void init_task_ledgers(void);
+
+
+int task_max = CONFIG_TASK_MAX; /* Max number of tasks */
+
+/* externs for BSD kernel */
+extern void proc_getexecutableuuid(void *, unsigned char *, unsigned long);
/* Forwards */
void task_hold_locked(
task_t task);
void task_wait_locked(
- task_t task);
+ task_t task,
+ boolean_t until_not_runnable);
void task_release_locked(
task_t task);
void task_free(
void task_synchronizer_destroy_all(
task_t task);
-kern_return_t task_set_ledger(
- task_t task,
- ledger_t wired,
- ledger_t paged);
+int check_for_tasksuspend(
+ task_t task);
void
task_backing_store_privileged(
task_t task,
boolean_t is64bit)
{
-#ifdef __i386__
+#if defined(__i386__) || defined(__x86_64__)
thread_t thread;
#endif /* __i386__ */
int vm_flags = 0;
(vm_map_offset_t) VM_MAX_ADDRESS,
MACH_VM_MAX_ADDRESS,
0);
-#ifdef __ppc__
- /* LP64todo - make this clean */
- /*
- * PPC51: ppc64 is limited to 51-bit addresses.
- * Memory mapped above that limit is handled specially
- * at the pmap level, so let pmap clean the commpage mapping
- * explicitly...
- */
- pmap_unmap_sharedpage(task->map->pmap); /* Unmap commpage */
- /* ... and avoid regular pmap cleanup */
- vm_flags |= VM_MAP_REMOVE_NO_PMAP_CLEANUP;
-#endif /* __ppc__ */
/* remove the higher VM mappings */
(void) vm_map_remove(task->map,
MACH_VM_MAX_ADDRESS,
* certain routines may observe the thread as being in an inconsistent
* state with respect to its task's 64-bitness.
*/
-#ifdef __i386__
+#if defined(__i386__) || defined(__x86_64__)
+ task_lock(task);
queue_iterate(&task->threads, thread, thread_t, task_threads) {
+ thread_mtx_lock(thread);
machine_thread_switch_addrmode(thread);
+ thread_mtx_unlock(thread);
}
+ task_unlock(task);
#endif /* __i386__ */
}
+
+void
+task_set_dyld_info(task_t task, mach_vm_address_t addr, mach_vm_size_t size)
+{
+ task_lock(task);
+ task->all_image_info_addr = addr;
+ task->all_image_info_size = size;
+ task_unlock(task);
+}
+
void
task_init(void)
{
+
+ lck_grp_attr_setdefault(&task_lck_grp_attr);
+ lck_grp_init(&task_lck_grp, "task", &task_lck_grp_attr);
+ lck_attr_setdefault(&task_lck_attr);
+ lck_mtx_init(&tasks_threads_lock, &task_lck_grp, &task_lck_attr);
+#if CONFIG_EMBEDDED
+ lck_mtx_init(&task_watch_mtx, &task_lck_grp, &task_lck_attr);
+#endif /* CONFIG_EMBEDDED */
+
task_zone = zinit(
sizeof(struct task),
- TASK_MAX * sizeof(struct task),
+ task_max * sizeof(struct task),
TASK_CHUNK * sizeof(struct task),
"tasks");
+ zone_change(task_zone, Z_NOENCRYPT, TRUE);
+
+ init_task_ledgers();
+
/*
* Create the kernel task as the first task.
*/
+#ifdef __LP64__
+ if (task_create_internal(TASK_NULL, FALSE, TRUE, &kernel_task) != KERN_SUCCESS)
+#else
if (task_create_internal(TASK_NULL, FALSE, FALSE, &kernel_task) != KERN_SUCCESS)
+#endif
panic("task_init\n");
vm_map_deallocate(kernel_task->map);
kernel_task->map = kernel_map;
+
}
/*
return(KERN_FAILURE);
}
+void
+init_task_ledgers(void)
+{
+ ledger_template_t t;
+
+ assert(task_ledger_template == NULL);
+ assert(kernel_task == TASK_NULL);
+
+ if ((t = ledger_template_create("Per-task ledger")) == NULL)
+ panic("couldn't create task ledger template");
+
+ task_ledgers.cpu_time = ledger_entry_add(t, "cpu_time", "sched", "ns");
+ task_ledgers.tkm_private = ledger_entry_add(t, "tkm_private",
+ "physmem", "bytes");
+ task_ledgers.tkm_shared = ledger_entry_add(t, "tkm_shared", "physmem",
+ "bytes");
+ task_ledgers.phys_mem = ledger_entry_add(t, "phys_mem", "physmem",
+ "bytes");
+ task_ledgers.wired_mem = ledger_entry_add(t, "wired_mem", "physmem",
+ "bytes");
+
+ if ((task_ledgers.cpu_time < 0) || (task_ledgers.tkm_private < 0) ||
+ (task_ledgers.tkm_shared < 0) || (task_ledgers.phys_mem < 0) ||
+ (task_ledgers.wired_mem < 0)) {
+ panic("couldn't create entries for task ledger template");
+ }
+
+ task_ledger_template = t;
+}
+
kern_return_t
task_create_internal(
task_t parent_task,
{
task_t new_task;
vm_shared_region_t shared_region;
+ ledger_t ledger = NULL;
new_task = (task_t) zalloc(task_zone);
/* one ref for just being alive; one for our caller */
new_task->ref_count = 2;
+ /* allocate with active entries */
+ assert(task_ledger_template != NULL);
+ if ((ledger = ledger_instantiate(task_ledger_template,
+ LEDGER_CREATE_ACTIVE_ENTRIES)) == NULL) {
+ zfree(task_zone, new_task);
+ return(KERN_RESOURCE_SHORTAGE);
+ }
+ new_task->ledger = ledger;
+
+ /* if inherit_memory is true, parent_task MUST not be NULL */
if (inherit_memory)
- new_task->map = vm_map_fork(parent_task->map);
+ new_task->map = vm_map_fork(ledger, parent_task->map);
else
- new_task->map = vm_map_create(pmap_create(0, is_64bit),
- (vm_map_offset_t)(VM_MIN_ADDRESS),
- (vm_map_offset_t)(VM_MAX_ADDRESS), TRUE);
+ new_task->map = vm_map_create(pmap_create(ledger, 0, is_64bit),
+ (vm_map_offset_t)(VM_MIN_ADDRESS),
+ (vm_map_offset_t)(VM_MAX_ADDRESS), TRUE);
/* Inherit memlock limit from parent */
if (parent_task)
- vm_map_set_user_wire_limit(new_task->map, parent_task->map->user_wire_limit);
+ vm_map_set_user_wire_limit(new_task->map, (vm_size_t)parent_task->map->user_wire_limit);
- mutex_init(&new_task->lock, 0);
+ lck_mtx_init(&new_task->lock, &task_lck_grp, &task_lck_attr);
queue_init(&new_task->threads);
new_task->suspend_count = 0;
new_task->thread_count = 0;
new_task->user_stop_count = 0;
new_task->role = TASK_UNSPECIFIED;
new_task->active = TRUE;
+ new_task->halting = FALSE;
new_task->user_data = NULL;
new_task->faults = 0;
new_task->cow_faults = 0;
new_task->taskFeatures[0] = 0; /* Init task features */
new_task->taskFeatures[1] = 0; /* Init task features */
+ zinfo_task_init(new_task);
+
#ifdef MACH_BSD
new_task->bsd_info = NULL;
#endif /* MACH_BSD */
-#ifdef __i386__
+#if defined(__i386__) || defined(__x86_64__)
new_task->i386_ldt = 0;
+ new_task->task_debug = NULL;
#endif
-#ifdef __ppc__
- if(BootProcInfo.pf.Available & pf64Bit) new_task->taskFeatures[0] |= tf64BitData; /* If 64-bit machine, show we have 64-bit registers at least */
-#endif
queue_init(&new_task->semaphore_list);
queue_init(&new_task->lock_set_list);
new_task->lock_sets_owned = 0;
#if CONFIG_MACF_MACH
- /*mutex_init(&new_task->labellock, ETAP_NO_TRACE);*/
new_task->label = labelh_new(1);
mac_task_label_init (&new_task->maclabel);
#endif
new_task->affinity_space = NULL;
+#if CONFIG_COUNTERS
+ new_task->t_chud = 0U;
+#endif
+
+ new_task->pidsuspended = FALSE;
+ new_task->frozen = FALSE;
+ new_task->rusage_cpu_flags = 0;
+ new_task->rusage_cpu_percentage = 0;
+ new_task->rusage_cpu_interval = 0;
+ new_task->rusage_cpu_deadline = 0;
+ new_task->rusage_cpu_callt = NULL;
+ new_task->proc_terminate = 0;
+#if CONFIG_EMBEDDED
+ queue_init(&new_task->task_watchers);
+ new_task->appstate = TASK_APPSTATE_ACTIVE;
+ new_task->num_taskwatchers = 0;
+ new_task->watchapplying = 0;
+#endif /* CONFIG_EMBEDDED */
+
+ new_task->uexc_range_start = new_task->uexc_range_size = new_task->uexc_handler = 0;
+
if (parent_task != TASK_NULL) {
new_task->sec_token = parent_task->sec_token;
new_task->audit_token = parent_task->audit_token;
shared_region = vm_shared_region_get(parent_task);
vm_shared_region_set(new_task, shared_region);
- new_task->wired_ledger_port = ledger_copy(
- convert_port_to_ledger(parent_task->wired_ledger_port));
- new_task->paged_ledger_port = ledger_copy(
- convert_port_to_ledger(parent_task->paged_ledger_port));
if(task_has_64BitAddr(parent_task))
task_set_64BitAddr(new_task);
+ new_task->all_image_info_addr = parent_task->all_image_info_addr;
+ new_task->all_image_info_size = parent_task->all_image_info_size;
-#ifdef __i386__
+#if defined(__i386__) || defined(__x86_64__)
if (inherit_memory && parent_task->i386_ldt)
new_task->i386_ldt = user_ldt_copy(parent_task->i386_ldt);
#endif
if (inherit_memory && parent_task->affinity_space)
task_affinity_create(parent_task, new_task);
+
+ new_task->pset_hint = parent_task->pset_hint = task_choose_pset(parent_task);
+ new_task->policystate = parent_task->policystate;
+ /* inherit the self action state */
+ new_task->appliedstate = parent_task->appliedstate;
+ new_task->ext_policystate = parent_task->ext_policystate;
+#if NOTYET
+ /* till the child lifecycle is cleared do not inherit external action */
+ new_task->ext_appliedstate = parent_task->ext_appliedstate;
+#else
+ new_task->ext_appliedstate = default_task_null_policy;
+#endif
}
else {
new_task->sec_token = KERNEL_SECURITY_TOKEN;
new_task->audit_token = KERNEL_AUDIT_TOKEN;
- new_task->wired_ledger_port = ledger_copy(root_wired_ledger);
- new_task->paged_ledger_port = ledger_copy(root_paged_ledger);
+#ifdef __LP64__
+ if(is_64bit)
+ task_set_64BitAddr(new_task);
+#endif
+ new_task->all_image_info_addr = (mach_vm_address_t)0;
+ new_task->all_image_info_size = (mach_vm_size_t)0;
+
+ new_task->pset_hint = PROCESSOR_SET_NULL;
+ new_task->policystate = default_task_proc_policy;
+ new_task->ext_policystate = default_task_proc_policy;
+ new_task->appliedstate = default_task_null_policy;
+ new_task->ext_appliedstate = default_task_null_policy;
}
if (kernel_task == TASK_NULL) {
new_task->priority = BASEPRI_DEFAULT;
new_task->max_priority = MAXPRI_USER;
}
+
+ bzero(&new_task->extmod_statistics, sizeof(new_task->extmod_statistics));
- mutex_lock(&tasks_threads_lock);
+ lck_mtx_lock(&tasks_threads_lock);
queue_enter(&tasks, new_task, task_t, tasks);
tasks_count++;
- mutex_unlock(&tasks_threads_lock);
+ lck_mtx_unlock(&tasks_threads_lock);
if (vm_backing_store_low && parent_task != NULL)
new_task->priv_flags |= (parent_task->priv_flags&VM_BACKING_STORE_PRIV);
task_deallocate(
task_t task)
{
+ ledger_amount_t credit, debit;
+
if (task == TASK_NULL)
return;
if (task_deallocate_internal(task) > 0)
return;
+ lck_mtx_lock(&tasks_threads_lock);
+ queue_remove(&terminated_tasks, task, task_t, tasks);
+ lck_mtx_unlock(&tasks_threads_lock);
+
+ /*
+ * Give the machine dependent code a chance
+ * to perform cleanup before ripping apart
+ * the task.
+ */
+ machine_task_terminate(task);
+
ipc_task_terminate(task);
if (task->affinity_space)
vm_map_deallocate(task->map);
is_release(task->itk_space);
+ lck_mtx_destroy(&task->lock, &task_lck_grp);
+
#if CONFIG_MACF_MACH
labelh_release(task->label);
#endif
+
+ if (!ledger_get_entries(task->ledger, task_ledgers.tkm_private, &credit,
+ &debit)) {
+ OSAddAtomic64(credit, (int64_t *)&tasks_tkm_private.alloc);
+ OSAddAtomic64(debit, (int64_t *)&tasks_tkm_private.free);
+ }
+ if (!ledger_get_entries(task->ledger, task_ledgers.tkm_shared, &credit,
+ &debit)) {
+ OSAddAtomic64(credit, (int64_t *)&tasks_tkm_shared.alloc);
+ OSAddAtomic64(debit, (int64_t *)&tasks_tkm_shared.free);
+ }
+ ledger_dereference(task->ledger);
+ zinfo_task_free(task);
zfree(task_zone, task);
}
task_lock(task);
}
- if (!task->active || !self->active) {
+ if (!task->active) {
/*
- * Task or current act is already being terminated.
+ * Task is already being terminated.
* Just return an error. If we are dying, this will
* just get us to our AST special handler and that
* will get us to finalize the termination of ourselves.
thread_terminate_internal(thread);
}
+ task_unlock(task);
+
+#if CONFIG_EMBEDDED
/*
- * Give the machine dependent code a chance
- * to perform cleanup before ripping apart
- * the task.
+ * remove all task watchers
*/
- if (self_task == task)
- machine_thread_terminate_self();
-
- task_unlock(task);
+ task_removewatchers(task);
+#endif /* CONFIG_EMBEDDED */
/*
* Destroy all synchronizers owned by the task.
/*
* Destroy the IPC space, leaving just a reference for it.
*/
- ipc_space_destroy(task->itk_space);
-
-#ifdef __ppc__
- /* LP64todo - make this clean */
- /*
- * PPC51: ppc64 is limited to 51-bit addresses.
- */
- pmap_unmap_sharedpage(task->map->pmap); /* Unmap commpage */
-#endif /* __ppc__ */
+ ipc_space_terminate(task->itk_space);
if (vm_map_has_4GB_pagezero(task->map))
vm_map_clear_4GB_pagezero(task->map);
/* release our shared region */
vm_shared_region_set(task, NULL);
- mutex_lock(&tasks_threads_lock);
+ lck_mtx_lock(&tasks_threads_lock);
queue_remove(&tasks, task, task_t, tasks);
+ queue_enter(&terminated_tasks, task, task_t, tasks);
tasks_count--;
- mutex_unlock(&tasks_threads_lock);
+ lck_mtx_unlock(&tasks_threads_lock);
/*
* We no longer need to guard against being aborted, so restore
*/
thread_interrupt_level(interrupt_save);
-#if __ppc__
- perfmon_release_facility(task); // notify the perfmon facility
-#endif
-
/*
* Get rid of the task active reference on itself.
*/
}
/*
- * task_halt:
+ * task_start_halt:
*
* Shut the current task down (except for the current thread) in
* preparation for dramatic changes to the task (probably exec).
- * We hold the task, terminate all other threads in the task and
- * wait for them to terminate, clean up the portspace, and when
- * all done, let the current thread go.
+ * We hold the task and mark all other threads in the task for
+ * termination.
*/
kern_return_t
-task_halt(
+task_start_halt(
task_t task)
{
thread_t thread, self;
task_lock(task);
- if (!task->active || !self->active) {
+ if (task->halting || !task->active || !self->active) {
/*
* Task or current thread is already being terminated.
* Hurry up and return out of the current kernel context
return (KERN_FAILURE);
}
+ task->halting = TRUE;
+
if (task->thread_count > 1) {
+
/*
* Mark all the threads to keep them from starting any more
* user-level execution. The thread_terminate_internal code
task_release_locked(task);
}
+ task_unlock(task);
+ return KERN_SUCCESS;
+}
+
+
+/*
+ * task_complete_halt:
+ *
+ * Complete task halt by waiting for threads to terminate, then clean
+ * up task resources (VM, port namespace, etc...) and then let the
+ * current thread go in the (practically empty) task context.
+ */
+void
+task_complete_halt(task_t task)
+{
+ task_lock(task);
+ assert(task->halting);
+ assert(task == current_task());
/*
- * Give the machine dependent code a chance
- * to perform cleanup before ripping apart
- * the task.
+ * Wait for the other threads to get shut down.
+ * When the last other thread is reaped, we'll be
+ * woken up.
*/
- machine_thread_terminate_self();
+ if (task->thread_count > 1) {
+ assert_wait((event_t)&task->halting, THREAD_UNINT);
+ task_unlock(task);
+ thread_block(THREAD_CONTINUE_NULL);
+ } else {
+ task_unlock(task);
+ }
- task_unlock(task);
+ /*
+ * Give the machine dependent code a chance
+ * to perform cleanup of task-level resources
+ * associated with the current thread before
+ * ripping apart the task.
+ */
+ machine_task_terminate(task);
/*
* Destroy all synchronizers owned by the task.
vm_map_remove(task->map, task->map->min_offset,
task->map->max_offset, VM_MAP_NO_FLAGS);
- return (KERN_SUCCESS);
+ task->halting = FALSE;
}
/*
return (KERN_SUCCESS);
}
+kern_return_t
+task_wait(
+ task_t task,
+ boolean_t until_not_runnable)
+{
+ if (task == TASK_NULL)
+ return (KERN_INVALID_ARGUMENT);
+
+ task_lock(task);
+
+ if (!task->active) {
+ task_unlock(task);
+
+ return (KERN_FAILURE);
+ }
+
+ task_wait_locked(task, until_not_runnable);
+ task_unlock(task);
+
+ return (KERN_SUCCESS);
+}
+
/*
* task_wait_locked:
*
*/
void
task_wait_locked(
- register task_t task)
+ register task_t task,
+ boolean_t until_not_runnable)
{
register thread_t thread, self;
*/
queue_iterate(&task->threads, thread, thread_t, task_threads) {
if (thread != self)
- thread_wait(thread);
+ thread_wait(thread, until_not_runnable);
}
}
return (KERN_SUCCESS);
}
-/*
- * task_suspend:
- *
- * Implement a user-level suspension on a task.
- *
- * Conditions:
- * The caller holds a reference to the task
- */
-kern_return_t
-task_suspend(
+static kern_return_t
+place_task_hold (
register task_t task)
-{
- if (task == TASK_NULL || task == kernel_task)
- return (KERN_INVALID_ARGUMENT);
-
- task_lock(task);
-
+{
if (!task->active) {
- task_unlock(task);
-
return (KERN_FAILURE);
}
* If the stop count was positive, the task is
* already stopped and we can exit.
*/
- task_unlock(task);
-
return (KERN_SUCCESS);
}
* to stop executing user code.
*/
task_hold_locked(task);
- task_wait_locked(task);
+ task_wait_locked(task, TRUE);
+
+ return (KERN_SUCCESS);
+}
+
+static kern_return_t
+release_task_hold (
+ register task_t task,
+ boolean_t pidresume)
+{
+ register boolean_t release = FALSE;
+
+ if (!task->active) {
+ return (KERN_FAILURE);
+ }
+
+ if (pidresume) {
+ if (task->pidsuspended == FALSE) {
+ return (KERN_FAILURE);
+ }
+ task->pidsuspended = FALSE;
+ }
+
+ if (task->user_stop_count > (task->pidsuspended ? 1 : 0)) {
+ if (--task->user_stop_count == 0) {
+ release = TRUE;
+ }
+ }
+ else {
+ return (KERN_FAILURE);
+ }
+
+ /*
+ * Release the task if necessary.
+ */
+ if (release)
+ task_release_locked(task);
+
+ return (KERN_SUCCESS);
+}
+
+/*
+ * task_suspend:
+ *
+ * Implement a user-level suspension on a task.
+ *
+ * Conditions:
+ * The caller holds a reference to the task
+ */
+kern_return_t
+task_suspend(
+ register task_t task)
+{
+ kern_return_t kr;
+
+ if (task == TASK_NULL || task == kernel_task)
+ return (KERN_INVALID_ARGUMENT);
+
+ task_lock(task);
+
+ kr = place_task_hold(task);
task_unlock(task);
- return (KERN_SUCCESS);
+ return (kr);
}
/*
task_resume(
register task_t task)
{
- register boolean_t release = FALSE;
+ kern_return_t kr;
if (task == TASK_NULL || task == kernel_task)
return (KERN_INVALID_ARGUMENT);
task_lock(task);
- if (!task->active) {
- task_unlock(task);
+ kr = release_task_hold(task, FALSE);
- return (KERN_FAILURE);
+ task_unlock(task);
+
+ return (kr);
+}
+
+kern_return_t
+task_pidsuspend_locked(task_t task)
+{
+ kern_return_t kr;
+
+ if (task->pidsuspended) {
+ kr = KERN_FAILURE;
+ goto out;
}
- if (task->user_stop_count > 0) {
- if (--task->user_stop_count == 0)
- release = TRUE;
+ task->pidsuspended = TRUE;
+
+ kr = place_task_hold(task);
+ if (kr != KERN_SUCCESS) {
+ task->pidsuspended = FALSE;
}
- else {
- task_unlock(task);
+out:
+ return(kr);
+}
- return (KERN_FAILURE);
+
+/*
+ * task_pidsuspend:
+ *
+ * Suspends a task by placing a hold on its threads.
+ *
+ * Conditions:
+ * The caller holds a reference to the task
+ */
+kern_return_t
+task_pidsuspend(
+ register task_t task)
+{
+ kern_return_t kr;
+
+ if (task == TASK_NULL || task == kernel_task)
+ return (KERN_INVALID_ARGUMENT);
+
+ task_lock(task);
+
+ kr = task_pidsuspend_locked(task);
+
+ task_unlock(task);
+
+ return (kr);
+}
+
+/* If enabled, we bring all the frozen pages back in prior to resumption; otherwise, they're faulted back in on demand */
+#define THAW_ON_RESUME 1
+
+/*
+ * task_pidresume:
+ * Resumes a previously suspended task.
+ *
+ * Conditions:
+ * The caller holds a reference to the task
+ */
+kern_return_t
+task_pidresume(
+ register task_t task)
+{
+ kern_return_t kr;
+#if (CONFIG_FREEZE && THAW_ON_RESUME)
+ boolean_t frozen;
+#endif
+
+ if (task == TASK_NULL || task == kernel_task)
+ return (KERN_INVALID_ARGUMENT);
+
+ task_lock(task);
+
+#if (CONFIG_FREEZE && THAW_ON_RESUME)
+ frozen = task->frozen;
+ task->frozen = FALSE;
+#endif
+
+ kr = release_task_hold(task, TRUE);
+
+ task_unlock(task);
+
+#if (CONFIG_FREEZE && THAW_ON_RESUME)
+ if ((kr == KERN_SUCCESS) && (frozen == TRUE)) {
+ kr = vm_map_thaw(task->map);
}
+#endif
- /*
- * Release the task if necessary.
- */
- if (release)
- task_release_locked(task);
+ return (kr);
+}
+
+#if CONFIG_FREEZE
+
+/*
+ * task_freeze:
+ *
+ * Freeze a task.
+ *
+ * Conditions:
+ * The caller holds a reference to the task
+ */
+kern_return_t
+task_freeze(
+ register task_t task,
+ uint32_t *purgeable_count,
+ uint32_t *wired_count,
+ uint32_t *clean_count,
+ uint32_t *dirty_count,
+ uint32_t dirty_budget,
+ boolean_t *shared,
+ boolean_t walk_only)
+{
+ kern_return_t kr;
+
+ if (task == TASK_NULL || task == kernel_task)
+ return (KERN_INVALID_ARGUMENT);
+
+ task_lock(task);
+
+ if (task->frozen) {
+ task_unlock(task);
+ return (KERN_FAILURE);
+ }
+
+ if (walk_only == FALSE) {
+ task->frozen = TRUE;
+ }
task_unlock(task);
- return (KERN_SUCCESS);
+ if (walk_only) {
+ kr = vm_map_freeze_walk(task->map, purgeable_count, wired_count, clean_count, dirty_count, dirty_budget, shared);
+ } else {
+ kr = vm_map_freeze(task->map, purgeable_count, wired_count, clean_count, dirty_count, dirty_budget, shared);
+ }
+
+ return (kr);
}
+/*
+ * task_thaw:
+ *
+ * Thaw a currently frozen task.
+ *
+ * Conditions:
+ * The caller holds a reference to the task
+ */
+kern_return_t
+task_thaw(
+ register task_t task)
+{
+ kern_return_t kr;
+
+ if (task == TASK_NULL || task == kernel_task)
+ return (KERN_INVALID_ARGUMENT);
+
+ task_lock(task);
+
+ if (!task->frozen) {
+ task_unlock(task);
+ return (KERN_FAILURE);
+ }
+
+ task->frozen = FALSE;
+
+ task_unlock(task);
+
+ kr = vm_map_thaw(task->map);
+
+ return (kr);
+}
+
+#endif /* CONFIG_FREEZE */
+
kern_return_t
host_security_set_task_token(
host_security_t host_security,
return(kr);
}
-/*
- * Utility routine to set a ledger
- */
-kern_return_t
-task_set_ledger(
- task_t task,
- ledger_t wired,
- ledger_t paged)
-{
- if (task == TASK_NULL)
- return(KERN_INVALID_ARGUMENT);
-
- task_lock(task);
- if (wired) {
- ipc_port_release_send(task->wired_ledger_port);
- task->wired_ledger_port = ledger_copy(wired);
- }
- if (paged) {
- ipc_port_release_send(task->paged_ledger_port);
- task->paged_ledger_port = ledger_copy(paged);
- }
- task_unlock(task);
-
- return(KERN_SUCCESS);
-}
-
/*
* This routine was added, pretty much exclusively, for registering the
* RPC glue vector for in-kernel short circuited tasks. Rather than
task_info_t task_info_out,
mach_msg_type_number_t *task_info_count)
{
+ kern_return_t error = KERN_SUCCESS;
+
if (task == TASK_NULL)
return (KERN_INVALID_ARGUMENT);
+ task_lock(task);
+
+ if ((task != current_task()) && (!task->active)) {
+ task_unlock(task);
+ return (KERN_INVALID_ARGUMENT);
+ }
+
switch (flavor) {
case TASK_BASIC_INFO_32:
case TASK_BASIC2_INFO_32:
{
task_basic_info_32_t basic_info;
- vm_map_t map;
+ vm_map_t map;
+ clock_sec_t secs;
+ clock_usec_t usecs;
- if (*task_info_count < TASK_BASIC_INFO_32_COUNT)
- return (KERN_INVALID_ARGUMENT);
+ if (*task_info_count < TASK_BASIC_INFO_32_COUNT) {
+ error = KERN_INVALID_ARGUMENT;
+ break;
+ }
basic_info = (task_basic_info_32_t)task_info_out;
map = (task == kernel_task)? kernel_map: task->map;
- basic_info->virtual_size = CAST_DOWN(vm_offset_t,map->size);
+ basic_info->virtual_size = (typeof(basic_info->virtual_size))map->size;
if (flavor == TASK_BASIC2_INFO_32) {
/*
* The "BASIC2" flavor gets the maximum resident
}
basic_info->resident_size *= PAGE_SIZE;
- task_lock(task);
basic_info->policy = ((task != kernel_task)?
POLICY_TIMESHARE: POLICY_RR);
basic_info->suspend_count = task->user_stop_count;
- absolutetime_to_microtime(task->total_user_time,
- (unsigned *)&basic_info->user_time.seconds,
- (unsigned *)&basic_info->user_time.microseconds);
- absolutetime_to_microtime(task->total_system_time,
- (unsigned *)&basic_info->system_time.seconds,
- (unsigned *)&basic_info->system_time.microseconds);
- task_unlock(task);
+ absolutetime_to_microtime(task->total_user_time, &secs, &usecs);
+ basic_info->user_time.seconds =
+ (typeof(basic_info->user_time.seconds))secs;
+ basic_info->user_time.microseconds = usecs;
+
+ absolutetime_to_microtime(task->total_system_time, &secs, &usecs);
+ basic_info->system_time.seconds =
+ (typeof(basic_info->system_time.seconds))secs;
+ basic_info->system_time.microseconds = usecs;
*task_info_count = TASK_BASIC_INFO_32_COUNT;
break;
case TASK_BASIC_INFO_64:
{
task_basic_info_64_t basic_info;
- vm_map_t map;
+ vm_map_t map;
+ clock_sec_t secs;
+ clock_usec_t usecs;
- if (*task_info_count < TASK_BASIC_INFO_64_COUNT)
- return (KERN_INVALID_ARGUMENT);
+ if (*task_info_count < TASK_BASIC_INFO_64_COUNT) {
+ error = KERN_INVALID_ARGUMENT;
+ break;
+ }
basic_info = (task_basic_info_64_t)task_info_out;
(mach_vm_size_t)(pmap_resident_count(map->pmap))
* PAGE_SIZE_64;
- task_lock(task);
basic_info->policy = ((task != kernel_task)?
POLICY_TIMESHARE: POLICY_RR);
basic_info->suspend_count = task->user_stop_count;
- absolutetime_to_microtime(task->total_user_time,
- (unsigned *)&basic_info->user_time.seconds,
- (unsigned *)&basic_info->user_time.microseconds);
- absolutetime_to_microtime(task->total_system_time,
- (unsigned *)&basic_info->system_time.seconds,
- (unsigned *)&basic_info->system_time.microseconds);
- task_unlock(task);
+ absolutetime_to_microtime(task->total_user_time, &secs, &usecs);
+ basic_info->user_time.seconds =
+ (typeof(basic_info->user_time.seconds))secs;
+ basic_info->user_time.microseconds = usecs;
+
+ absolutetime_to_microtime(task->total_system_time, &secs, &usecs);
+ basic_info->system_time.seconds =
+ (typeof(basic_info->system_time.seconds))secs;
+ basic_info->system_time.microseconds = usecs;
*task_info_count = TASK_BASIC_INFO_64_COUNT;
break;
}
+ case MACH_TASK_BASIC_INFO:
+ {
+ mach_task_basic_info_t basic_info;
+ vm_map_t map;
+ clock_sec_t secs;
+ clock_usec_t usecs;
+
+ if (*task_info_count < MACH_TASK_BASIC_INFO_COUNT) {
+ error = KERN_INVALID_ARGUMENT;
+ break;
+ }
+
+ basic_info = (mach_task_basic_info_t)task_info_out;
+
+ map = (task == kernel_task) ? kernel_map : task->map;
+
+ basic_info->virtual_size = map->size;
+
+ basic_info->resident_size =
+ (mach_vm_size_t)(pmap_resident_count(map->pmap));
+ basic_info->resident_size *= PAGE_SIZE_64;
+
+ basic_info->resident_size_max =
+ (mach_vm_size_t)(pmap_resident_max(map->pmap));
+ basic_info->resident_size_max *= PAGE_SIZE_64;
+
+ basic_info->policy = ((task != kernel_task) ?
+ POLICY_TIMESHARE : POLICY_RR);
+
+ basic_info->suspend_count = task->user_stop_count;
+
+ absolutetime_to_microtime(task->total_user_time, &secs, &usecs);
+ basic_info->user_time.seconds =
+ (typeof(basic_info->user_time.seconds))secs;
+ basic_info->user_time.microseconds = usecs;
+
+ absolutetime_to_microtime(task->total_system_time, &secs, &usecs);
+ basic_info->system_time.seconds =
+ (typeof(basic_info->system_time.seconds))secs;
+ basic_info->system_time.microseconds = usecs;
+
+ *task_info_count = MACH_TASK_BASIC_INFO_COUNT;
+ break;
+ }
+
case TASK_THREAD_TIMES_INFO:
{
register task_thread_times_info_t times_info;
register thread_t thread;
- if (*task_info_count < TASK_THREAD_TIMES_INFO_COUNT)
- return (KERN_INVALID_ARGUMENT);
+ if (*task_info_count < TASK_THREAD_TIMES_INFO_COUNT) {
+ error = KERN_INVALID_ARGUMENT;
+ break;
+ }
times_info = (task_thread_times_info_t) task_info_out;
times_info->user_time.seconds = 0;
times_info->system_time.seconds = 0;
times_info->system_time.microseconds = 0;
- task_lock(task);
queue_iterate(&task->threads, thread, thread_t, task_threads) {
time_value_t user_time, system_time;
time_value_add(×_info->system_time, &system_time);
}
- task_unlock(task);
*task_info_count = TASK_THREAD_TIMES_INFO_COUNT;
break;
task_absolutetime_info_t info;
register thread_t thread;
- if (*task_info_count < TASK_ABSOLUTETIME_INFO_COUNT)
- return (KERN_INVALID_ARGUMENT);
+ if (*task_info_count < TASK_ABSOLUTETIME_INFO_COUNT) {
+ error = KERN_INVALID_ARGUMENT;
+ break;
+ }
info = (task_absolutetime_info_t)task_info_out;
info->threads_user = info->threads_system = 0;
- task_lock(task);
info->total_user = task->total_user_time;
info->total_system = task->total_system_time;
queue_iterate(&task->threads, thread, thread_t, task_threads) {
uint64_t tval;
+ spl_t x;
+
+ x = splsched();
+ thread_lock(thread);
tval = timer_grab(&thread->user_timer);
info->threads_user += tval;
info->total_user += tval;
tval = timer_grab(&thread->system_timer);
- info->threads_system += tval;
- info->total_system += tval;
+ if (thread->precise_user_kernel_time) {
+ info->threads_system += tval;
+ info->total_system += tval;
+ } else {
+ /* system_timer may represent either sys or user */
+ info->threads_user += tval;
+ info->total_user += tval;
+ }
+
+ thread_unlock(thread);
+ splx(x);
}
- task_unlock(task);
*task_info_count = TASK_ABSOLUTETIME_INFO_COUNT;
break;
}
+ case TASK_DYLD_INFO:
+ {
+ task_dyld_info_t info;
+
+ /*
+ * We added the format field to TASK_DYLD_INFO output. For
+ * temporary backward compatibility, accept the fact that
+ * clients may ask for the old version - distinquished by the
+ * size of the expected result structure.
+ */
+#define TASK_LEGACY_DYLD_INFO_COUNT \
+ offsetof(struct task_dyld_info, all_image_info_format)/sizeof(natural_t)
+
+ if (*task_info_count < TASK_LEGACY_DYLD_INFO_COUNT) {
+ error = KERN_INVALID_ARGUMENT;
+ break;
+ }
+
+ info = (task_dyld_info_t)task_info_out;
+ info->all_image_info_addr = task->all_image_info_addr;
+ info->all_image_info_size = task->all_image_info_size;
+
+ /* only set format on output for those expecting it */
+ if (*task_info_count >= TASK_DYLD_INFO_COUNT) {
+ info->all_image_info_format = task_has_64BitAddr(task) ?
+ TASK_DYLD_ALL_IMAGE_INFO_64 :
+ TASK_DYLD_ALL_IMAGE_INFO_32 ;
+ *task_info_count = TASK_DYLD_INFO_COUNT;
+ } else {
+ *task_info_count = TASK_LEGACY_DYLD_INFO_COUNT;
+ }
+ break;
+ }
+
+ case TASK_EXTMOD_INFO:
+ {
+ task_extmod_info_t info;
+ void *p;
+
+ if (*task_info_count < TASK_EXTMOD_INFO_COUNT) {
+ error = KERN_INVALID_ARGUMENT;
+ break;
+ }
+
+ info = (task_extmod_info_t)task_info_out;
+
+ p = get_bsdtask_info(task);
+ if (p) {
+ proc_getexecutableuuid(p, info->task_uuid, sizeof(info->task_uuid));
+ } else {
+ bzero(info->task_uuid, sizeof(info->task_uuid));
+ }
+ info->extmod_statistics = task->extmod_statistics;
+ *task_info_count = TASK_EXTMOD_INFO_COUNT;
+
+ break;
+ }
+
+ case TASK_KERNELMEMORY_INFO:
+ {
+ task_kernelmemory_info_t tkm_info;
+ ledger_amount_t credit, debit;
+
+ if (*task_info_count < TASK_KERNELMEMORY_INFO_COUNT) {
+ error = KERN_INVALID_ARGUMENT;
+ break;
+ }
+
+ tkm_info = (task_kernelmemory_info_t) task_info_out;
+ tkm_info->total_palloc = 0;
+ tkm_info->total_pfree = 0;
+ tkm_info->total_salloc = 0;
+ tkm_info->total_sfree = 0;
+
+ if (task == kernel_task) {
+ /*
+ * All shared allocs/frees from other tasks count against
+ * the kernel private memory usage. If we are looking up
+ * info for the kernel task, gather from everywhere.
+ */
+ task_unlock(task);
+
+ /* start by accounting for all the terminated tasks against the kernel */
+ tkm_info->total_palloc = tasks_tkm_private.alloc + tasks_tkm_shared.alloc;
+ tkm_info->total_pfree = tasks_tkm_private.free + tasks_tkm_shared.free;
+
+ /* count all other task/thread shared alloc/free against the kernel */
+ lck_mtx_lock(&tasks_threads_lock);
+
+ /* XXX this really shouldn't be using the function parameter 'task' as a local var! */
+ queue_iterate(&tasks, task, task_t, tasks) {
+ if (task == kernel_task) {
+ if (ledger_get_entries(task->ledger,
+ task_ledgers.tkm_private, &credit,
+ &debit) == KERN_SUCCESS) {
+ tkm_info->total_palloc += credit;
+ tkm_info->total_pfree += debit;
+ }
+ }
+ if (!ledger_get_entries(task->ledger,
+ task_ledgers.tkm_shared, &credit, &debit)) {
+ tkm_info->total_palloc += credit;
+ tkm_info->total_pfree += debit;
+ }
+ }
+ lck_mtx_unlock(&tasks_threads_lock);
+ } else {
+ if (!ledger_get_entries(task->ledger,
+ task_ledgers.tkm_private, &credit, &debit)) {
+ tkm_info->total_palloc = credit;
+ tkm_info->total_pfree = debit;
+ }
+ if (!ledger_get_entries(task->ledger,
+ task_ledgers.tkm_shared, &credit, &debit)) {
+ tkm_info->total_salloc = credit;
+ tkm_info->total_sfree = debit;
+ }
+ task_unlock(task);
+ }
+
+ *task_info_count = TASK_KERNELMEMORY_INFO_COUNT;
+ return KERN_SUCCESS;
+ }
+
/* OBSOLETE */
case TASK_SCHED_FIFO_INFO:
{
- if (*task_info_count < POLICY_FIFO_BASE_COUNT)
- return (KERN_INVALID_ARGUMENT);
+ if (*task_info_count < POLICY_FIFO_BASE_COUNT) {
+ error = KERN_INVALID_ARGUMENT;
+ break;
+ }
- return (KERN_INVALID_POLICY);
+ error = KERN_INVALID_POLICY;
+ break;
}
/* OBSOLETE */
case TASK_SCHED_RR_INFO:
{
register policy_rr_base_t rr_base;
+ uint32_t quantum_time;
+ uint64_t quantum_ns;
- if (*task_info_count < POLICY_RR_BASE_COUNT)
- return (KERN_INVALID_ARGUMENT);
+ if (*task_info_count < POLICY_RR_BASE_COUNT) {
+ error = KERN_INVALID_ARGUMENT;
+ break;
+ }
rr_base = (policy_rr_base_t) task_info_out;
- task_lock(task);
if (task != kernel_task) {
- task_unlock(task);
- return (KERN_INVALID_POLICY);
+ error = KERN_INVALID_POLICY;
+ break;
}
rr_base->base_priority = task->priority;
- task_unlock(task);
- rr_base->quantum = std_quantum_us / 1000;
+ quantum_time = SCHED(initial_quantum_size)(THREAD_NULL);
+ absolutetime_to_nanoseconds(quantum_time, &quantum_ns);
+
+ rr_base->quantum = (uint32_t)(quantum_ns / 1000 / 1000);
*task_info_count = POLICY_RR_BASE_COUNT;
break;
{
register policy_timeshare_base_t ts_base;
- if (*task_info_count < POLICY_TIMESHARE_BASE_COUNT)
- return (KERN_INVALID_ARGUMENT);
+ if (*task_info_count < POLICY_TIMESHARE_BASE_COUNT) {
+ error = KERN_INVALID_ARGUMENT;
+ break;
+ }
ts_base = (policy_timeshare_base_t) task_info_out;
- task_lock(task);
if (task == kernel_task) {
- task_unlock(task);
- return (KERN_INVALID_POLICY);
+ error = KERN_INVALID_POLICY;
+ break;
}
ts_base->base_priority = task->priority;
- task_unlock(task);
*task_info_count = POLICY_TIMESHARE_BASE_COUNT;
break;
{
register security_token_t *sec_token_p;
- if (*task_info_count < TASK_SECURITY_TOKEN_COUNT)
- return (KERN_INVALID_ARGUMENT);
+ if (*task_info_count < TASK_SECURITY_TOKEN_COUNT) {
+ error = KERN_INVALID_ARGUMENT;
+ break;
+ }
sec_token_p = (security_token_t *) task_info_out;
- task_lock(task);
*sec_token_p = task->sec_token;
- task_unlock(task);
*task_info_count = TASK_SECURITY_TOKEN_COUNT;
break;
{
register audit_token_t *audit_token_p;
- if (*task_info_count < TASK_AUDIT_TOKEN_COUNT)
- return (KERN_INVALID_ARGUMENT);
+ if (*task_info_count < TASK_AUDIT_TOKEN_COUNT) {
+ error = KERN_INVALID_ARGUMENT;
+ break;
+ }
audit_token_p = (audit_token_t *) task_info_out;
- task_lock(task);
*audit_token_p = task->audit_token;
- task_unlock(task);
*task_info_count = TASK_AUDIT_TOKEN_COUNT;
break;
}
case TASK_SCHED_INFO:
- return (KERN_INVALID_ARGUMENT);
+ error = KERN_INVALID_ARGUMENT;
+ break;
case TASK_EVENTS_INFO:
{
register task_events_info_t events_info;
register thread_t thread;
- if (*task_info_count < TASK_EVENTS_INFO_COUNT)
- return (KERN_INVALID_ARGUMENT);
+ if (*task_info_count < TASK_EVENTS_INFO_COUNT) {
+ error = KERN_INVALID_ARGUMENT;
+ break;
+ }
events_info = (task_events_info_t) task_info_out;
- task_lock(task);
events_info->faults = task->faults;
events_info->pageins = task->pageins;
events_info->csw = task->c_switch;
queue_iterate(&task->threads, thread, thread_t, task_threads) {
- events_info->csw += thread->c_switch;
+ events_info->csw += thread->c_switch;
+ events_info->syscalls_mach += thread->syscalls_mach;
+ events_info->syscalls_unix += thread->syscalls_unix;
}
- task_unlock(task);
*task_info_count = TASK_EVENTS_INFO_COUNT;
break;
}
case TASK_AFFINITY_TAG_INFO:
{
- if (*task_info_count < TASK_AFFINITY_TAG_INFO_COUNT)
- return (KERN_INVALID_ARGUMENT);
+ if (*task_info_count < TASK_AFFINITY_TAG_INFO_COUNT) {
+ error = KERN_INVALID_ARGUMENT;
+ break;
+ }
- return task_affinity_info(task, task_info_out, task_info_count);
+ error = task_affinity_info(task, task_info_out, task_info_count);
+ break;
}
-
default:
- return (KERN_INVALID_ARGUMENT);
+ error = KERN_INVALID_ARGUMENT;
}
- return (KERN_SUCCESS);
+ task_unlock(task);
+ return (error);
}
void
integer_t which)
{
thread_t thread;
+ spl_t x;
/* assert(task == current_task()); */ /* bogus assert 4803227 4807483 */
case TASK_VTIMER_USER:
queue_iterate(&task->threads, thread, thread_t, task_threads) {
- thread->vtimer_user_save = timer_grab(&thread->user_timer);
+ x = splsched();
+ thread_lock(thread);
+ if (thread->precise_user_kernel_time)
+ thread->vtimer_user_save = timer_grab(&thread->user_timer);
+ else
+ thread->vtimer_user_save = timer_grab(&thread->system_timer);
+ thread_unlock(thread);
+ splx(x);
}
break;
case TASK_VTIMER_PROF:
queue_iterate(&task->threads, thread, thread_t, task_threads) {
+ x = splsched();
+ thread_lock(thread);
thread->vtimer_prof_save = timer_grab(&thread->user_timer);
thread->vtimer_prof_save += timer_grab(&thread->system_timer);
+ thread_unlock(thread);
+ splx(x);
}
break;
case TASK_VTIMER_RLIM:
queue_iterate(&task->threads, thread, thread_t, task_threads) {
+ x = splsched();
+ thread_lock(thread);
thread->vtimer_rlim_save = timer_grab(&thread->user_timer);
thread->vtimer_rlim_save += timer_grab(&thread->system_timer);
+ thread_unlock(thread);
+ splx(x);
}
break;
}
uint32_t *microsecs)
{
thread_t thread = current_thread();
- uint32_t tdelt, secs;
+ uint32_t tdelt;
+ clock_sec_t secs;
uint64_t tsum;
assert(task == current_task());
assert(task->vtimers & which);
- tdelt = secs = 0;
+ secs = tdelt = 0;
switch (which) {
case TASK_VTIMER_USER:
- tdelt = timer_delta(&thread->user_timer,
+ if (thread->precise_user_kernel_time) {
+ tdelt = (uint32_t)timer_delta(&thread->user_timer,
+ &thread->vtimer_user_save);
+ } else {
+ tdelt = (uint32_t)timer_delta(&thread->system_timer,
&thread->vtimer_user_save);
+ }
+ absolutetime_to_microtime(tdelt, &secs, microsecs);
break;
case TASK_VTIMER_PROF:
tsum = timer_grab(&thread->user_timer);
tsum += timer_grab(&thread->system_timer);
- tdelt = tsum - thread->vtimer_prof_save;
- thread->vtimer_prof_save = tsum;
+ tdelt = (uint32_t)(tsum - thread->vtimer_prof_save);
+ absolutetime_to_microtime(tdelt, &secs, microsecs);
+ /* if the time delta is smaller than a usec, ignore */
+ if (*microsecs != 0)
+ thread->vtimer_prof_save = tsum;
break;
case TASK_VTIMER_RLIM:
tsum = timer_grab(&thread->user_timer);
tsum += timer_grab(&thread->system_timer);
- tdelt = tsum - thread->vtimer_rlim_save;
+ tdelt = (uint32_t)(tsum - thread->vtimer_rlim_save);
thread->vtimer_rlim_save = tsum;
+ absolutetime_to_microtime(tdelt, &secs, microsecs);
break;
}
- absolutetime_to_microtime(tdelt, &secs, microsecs);
}
/*
}
}
+/*
+ * Install default (machine-dependent) initial thread state
+ * on the task. Subsequent thread creation will have this initial
+ * state set on the thread by machine_thread_inherit_taskwide().
+ * Flavors and structures are exactly the same as those to thread_set_state()
+ */
+kern_return_t
+task_set_state(
+ task_t task,
+ int flavor,
+ thread_state_t state,
+ mach_msg_type_number_t state_count)
+{
+ kern_return_t ret;
+
+ if (task == TASK_NULL) {
+ return (KERN_INVALID_ARGUMENT);
+ }
+
+ task_lock(task);
+
+ if (!task->active) {
+ task_unlock(task);
+ return (KERN_FAILURE);
+ }
+
+ ret = machine_task_set_state(task, flavor, state, state_count);
+
+ task_unlock(task);
+ return ret;
+}
+
+/*
+ * Examine the default (machine-dependent) initial thread state
+ * on the task, as set by task_set_state(). Flavors and structures
+ * are exactly the same as those passed to thread_get_state().
+ */
+kern_return_t
+task_get_state(
+ task_t task,
+ int flavor,
+ thread_state_t state,
+ mach_msg_type_number_t *state_count)
+{
+ kern_return_t ret;
+
+ if (task == TASK_NULL) {
+ return (KERN_INVALID_ARGUMENT);
+ }
+
+ task_lock(task);
+
+ if (!task->active) {
+ task_unlock(task);
+ return (KERN_FAILURE);
+ }
+
+ ret = machine_task_get_state(task, flavor, state, state_count);
+
+ task_unlock(task);
+ return ret;
+}
+
+
/*
* We need to export some functions to other components that
* are currently implemented in macros within the osfmk
return (FALSE);
}
+int
+check_for_tasksuspend(task_t task)
+{
+
+ if (task == TASK_NULL)
+ return (0);
+
+ return (task->suspend_count > 0);
+}
+
#undef current_task
task_t current_task(void);
task_t current_task(void)
task_reference_internal(task);
}
+/*
+ * This routine is called always with task lock held.
+ * And it returns a thread handle without reference as the caller
+ * operates on it under the task lock held.
+ */
+thread_t
+task_findtid(task_t task, uint64_t tid)
+{
+ thread_t thread= THREAD_NULL;
+
+ queue_iterate(&task->threads, thread, thread_t, task_threads) {
+ if (thread->thread_id == tid)
+ return(thread);
+ }
+ return(THREAD_NULL);
+}
+
+
#if CONFIG_MACF_MACH
/*
* Protect 2 task labels against modification by adding a reference on
projects / apple / xnu.git / blobdiff