/*
- * Copyright (c) 2000 Apple Computer, Inc. All rights reserved.
+ * Copyright (c) 2000-2010 Apple Inc. All rights reserved.
*
- * @APPLE_LICENSE_HEADER_START@
+ * @APPLE_OSREFERENCE_LICENSE_HEADER_START@
*
- * The contents of this file constitute Original Code as defined in and
- * are subject to the Apple Public Source License Version 1.1 (the
- * "License"). You may not use this file except in compliance with the
- * License. Please obtain a copy of the License at
- * http://www.apple.com/publicsource and read it before using this file.
+ * This file contains Original Code and/or Modifications of Original Code
+ * as defined in and that are subject to the Apple Public Source License
+ * Version 2.0 (the 'License'). You may not use this file except in
+ * compliance with the License. The rights granted to you under the License
+ * may not be used to create, or enable the creation or redistribution of,
+ * unlawful or unlicensed copies of an Apple operating system, or to
+ * circumvent, violate, or enable the circumvention or violation of, any
+ * terms of an Apple operating system software license agreement.
*
- * This Original Code and all software distributed under the License are
- * distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY KIND, EITHER
+ * Please obtain a copy of the License at
+ * http://www.opensource.apple.com/apsl/ and read it before using this file.
+ *
+ * The Original Code and all software distributed under the License are
+ * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
* EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
* INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
- * FITNESS FOR A PARTICULAR PURPOSE OR NON-INFRINGEMENT. Please see the
- * License for the specific language governing rights and limitations
- * under the License.
+ * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
+ * Please see the License for the specific language governing rights and
+ * limitations under the License.
*
- * @APPLE_LICENSE_HEADER_END@
+ * @APPLE_OSREFERENCE_LICENSE_HEADER_END@
*/
/*
* @OSF_FREE_COPYRIGHT@
* improvements that they make and grant CSL redistribution rights.
*
*/
+/*
+ * NOTICE: This file was modified by McAfee Research in 2004 to introduce
+ * support for mandatory and extensible security protections. This notice
+ * is included in support of clause 2.2 (b) of the Apple Public License,
+ * Version 2.0.
+ * Copyright (c) 2005 SPARTA, Inc.
+ */
-#include <mach_kdb.h>
-#include <mach_host.h>
-#include <mach_prof.h>
#include <fast_tas.h>
-#include <task_swapper.h>
#include <platforms.h>
+#include <mach/mach_types.h>
#include <mach/boolean.h>
+#include <mach/host_priv.h>
#include <mach/machine/vm_types.h>
#include <mach/vm_param.h>
#include <mach/semaphore.h>
#include <mach/task_info.h>
#include <mach/task_special_ports.h>
-#include <mach/mach_types.h>
+
+#include <ipc/ipc_types.h>
#include <ipc/ipc_space.h>
#include <ipc/ipc_entry.h>
+
+#include <kern/kern_types.h>
#include <kern/mach_param.h>
#include <kern/misc_protos.h>
#include <kern/task.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 <vm/vm_kern.h> /* for kernel_map, ipc_kernel_map */
-#include <kern/profile.h>
+#include <kern/clock.h>
+#include <kern/timer.h>
#include <kern/assert.h>
#include <kern/sync_lock.h>
-#if MACH_KDB
-#include <ddb/db_sym.h>
-#endif /* MACH_KDB */
+#include <kern/affinity.h>
-#if TASK_SWAPPER
-#include <kern/task_swap.h>
-#endif /* TASK_SWAPPER */
+#include <vm/pmap.h>
+#include <vm/vm_map.h>
+#include <vm/vm_kern.h> /* for kernel_map, ipc_kernel_map */
+#include <vm/vm_pageout.h>
+#include <vm/vm_protos.h>
/*
* Exported interfaces
#include <mach/task_server.h>
#include <mach/mach_host_server.h>
#include <mach/host_security_server.h>
-#include <vm/task_working_set.h>
+#include <mach/mach_port_server.h>
+#include <mach/security_server.h>
+
+#include <vm/vm_shared_region.h>
+
+#if CONFIG_MACF_MACH
+#include <security/mac_mach_internal.h>
+#endif
+
+#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);
-task_t kernel_task;
-zone_t task_zone;
+
+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_collect_scan(void);
void task_free(
task_t task );
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_init(void)
+task_backing_store_privileged(
+ task_t task)
{
- task_zone = zinit(
- sizeof(struct task),
- TASK_MAX * sizeof(struct task),
- TASK_CHUNK * sizeof(struct task),
- "tasks");
+ task_lock(task);
+ task->priv_flags |= VM_BACKING_STORE_PRIV;
+ task_unlock(task);
+ return;
+}
- eml_init();
- /*
- * Create the kernel task as the first task.
- * Task_create_local must assign to kernel_task as a side effect,
- * for other initialization. (:-()
- */
- if (task_create_local(
- TASK_NULL, FALSE, FALSE, &kernel_task) != KERN_SUCCESS)
- panic("task_init\n");
- vm_map_deallocate(kernel_task->map);
- kernel_task->map = kernel_map;
+void
+task_set_64bit(
+ task_t task,
+ boolean_t is64bit)
+{
+#if defined(__i386__) || defined(__x86_64__)
+ thread_t thread;
+#endif /* __i386__ */
+ int vm_flags = 0;
-#if MACH_ASSERT
- if (watchacts & WA_TASK)
- printf("task_init: kernel_task = %x map=%x\n",
- kernel_task, kernel_map);
-#endif /* MACH_ASSERT */
-}
+ if (is64bit) {
+ if (task_has_64BitAddr(task))
+ return;
-#if MACH_HOST
+ task_set_64BitAddr(task);
+ } else {
+ if ( !task_has_64BitAddr(task))
+ return;
-#if 0
-static void
-task_freeze(
- task_t task)
-{
- task_lock(task);
- /*
- * If may_assign is false, task is already being assigned,
- * wait for that to finish.
+ /*
+ * Deallocate all memory previously allocated
+ * above the 32-bit address space, since it won't
+ * be accessible anymore.
+ */
+ /* remove regular VM map entries & pmap mappings */
+ (void) vm_map_remove(task->map,
+ (vm_map_offset_t) VM_MAX_ADDRESS,
+ MACH_VM_MAX_ADDRESS,
+ 0);
+ /* remove the higher VM mappings */
+ (void) vm_map_remove(task->map,
+ MACH_VM_MAX_ADDRESS,
+ 0xFFFFFFFFFFFFF000ULL,
+ vm_flags);
+ task_clear_64BitAddr(task);
+ }
+ /* FIXME: On x86, the thread save state flavor can diverge from the
+ * task's 64-bit feature flag due to the 32-bit/64-bit register save
+ * state dichotomy. Since we can be pre-empted in this interval,
+ * certain routines may observe the thread as being in an inconsistent
+ * state with respect to its task's 64-bitness.
*/
- while (task->may_assign == FALSE) {
- wait_result_t res;
-
- task->assign_active = TRUE;
- res = thread_sleep_mutex((event_t) &task->assign_active,
- &task->lock, THREAD_UNINT);
- assert(res == THREAD_AWAKENED);
+#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->may_assign = FALSE;
task_unlock(task);
- return;
+#endif /* __i386__ */
}
-#else
-#define thread_freeze(thread) assert(task->processor_set == &default_pset)
-#endif
-#if 0
-static void
-task_unfreeze(
- task_t task)
+
+void
+task_set_dyld_info(task_t task, mach_vm_address_t addr, mach_vm_size_t size)
{
task_lock(task);
- assert(task->may_assign == FALSE);
- task->may_assign = TRUE;
- if (task->assign_active == TRUE) {
- task->assign_active = FALSE;
- thread_wakeup((event_t)&task->assign_active);
- }
+ task->all_image_info_addr = addr;
+ task->all_image_info_size = size;
task_unlock(task);
- return;
}
+
+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_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
-#define thread_unfreeze(thread) assert(task->processor_set == &default_pset)
+ 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;
-#endif /* MACH_HOST */
+}
/*
* Create a task running in the kernel address space. It may
*/
kern_return_t
kernel_task_create(
- task_t parent_task,
- vm_offset_t map_base,
- vm_size_t map_size,
- task_t *child_task)
+ __unused task_t parent_task,
+ __unused vm_offset_t map_base,
+ __unused vm_size_t map_size,
+ __unused task_t *child_task)
{
- kern_return_t result;
- task_t new_task;
- vm_map_t old_map;
-
- /*
- * Create the task.
- */
- result = task_create_local(parent_task, FALSE, TRUE, &new_task);
- if (result != KERN_SUCCESS)
- return (result);
-
- /*
- * Task_create_local creates the task with a user-space map.
- * We attempt to replace the map and free it afterwards; else
- * task_deallocate will free it (can NOT set map to null before
- * task_deallocate, this impersonates a norma placeholder task).
- * _Mark the memory as pageable_ -- this is what we
- * want for images (like servers) loaded into the kernel.
- */
- if (map_size == 0) {
- vm_map_deallocate(new_task->map);
- new_task->map = kernel_map;
- *child_task = new_task;
- } else {
- old_map = new_task->map;
- if ((result = kmem_suballoc(kernel_map, &map_base,
- map_size, TRUE, FALSE,
- &new_task->map)) != KERN_SUCCESS) {
- /*
- * New task created with ref count of 2 -- decrement by
- * one to force task deletion.
- */
- printf("kmem_suballoc(%x,%x,%x,1,0,&new) Fails\n",
- kernel_map, map_base, map_size);
- --new_task->ref_count;
- task_deallocate(new_task);
- return (result);
- }
- vm_map_deallocate(old_map);
- *child_task = new_task;
- }
- return (KERN_SUCCESS);
+ return (KERN_INVALID_ARGUMENT);
}
kern_return_t
task_create(
- task_t parent_task,
- ledger_port_array_t ledger_ports,
- mach_msg_type_number_t num_ledger_ports,
- boolean_t inherit_memory,
- task_t *child_task) /* OUT */
+ task_t parent_task,
+ __unused ledger_port_array_t ledger_ports,
+ __unused mach_msg_type_number_t num_ledger_ports,
+ __unused boolean_t inherit_memory,
+ __unused task_t *child_task) /* OUT */
{
if (parent_task == TASK_NULL)
return(KERN_INVALID_ARGUMENT);
- return task_create_local(
- parent_task, inherit_memory, FALSE, child_task);
+ /*
+ * No longer supported: too many calls assume that a task has a valid
+ * process attached.
+ */
+ return(KERN_FAILURE);
}
kern_return_t
host_security_create_task_token(
- host_security_t host_security,
- task_t parent_task,
- security_token_t sec_token,
- host_priv_t host_priv,
- ledger_port_array_t ledger_ports,
- mach_msg_type_number_t num_ledger_ports,
- boolean_t inherit_memory,
- task_t *child_task) /* OUT */
+ host_security_t host_security,
+ task_t parent_task,
+ __unused security_token_t sec_token,
+ __unused audit_token_t audit_token,
+ __unused host_priv_t host_priv,
+ __unused ledger_port_array_t ledger_ports,
+ __unused mach_msg_type_number_t num_ledger_ports,
+ __unused boolean_t inherit_memory,
+ __unused task_t *child_task) /* OUT */
{
- kern_return_t result;
-
if (parent_task == TASK_NULL)
return(KERN_INVALID_ARGUMENT);
if (host_security == HOST_NULL)
return(KERN_INVALID_SECURITY);
- result = task_create_local(
- parent_task, inherit_memory, FALSE, child_task);
-
- if (result != KERN_SUCCESS)
- return(result);
-
- result = host_security_set_task_token(host_security,
- *child_task,
- sec_token,
- host_priv);
+ /*
+ * No longer supported.
+ */
+ return(KERN_FAILURE);
+}
- if (result != KERN_SUCCESS)
- return(result);
+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");
+ }
- return(result);
+ task_ledger_template = t;
}
kern_return_t
-task_create_local(
+task_create_internal(
task_t parent_task,
boolean_t inherit_memory,
- boolean_t kernel_loaded,
+ boolean_t is_64bit,
task_t *child_task) /* OUT */
{
- task_t new_task;
- processor_set_t pset;
+ 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),
- round_page(VM_MIN_ADDRESS),
- trunc_page(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, (vm_size_t)parent_task->map->user_wire_limit);
- mutex_init(&new_task->lock, ETAP_THREAD_TASK_NEW);
- queue_init(&new_task->thr_acts);
+ lck_mtx_init(&new_task->lock, &task_lck_grp, &task_lck_attr);
+ queue_init(&new_task->threads);
new_task->suspend_count = 0;
- new_task->thr_act_count = 0;
- new_task->res_act_count = 0;
- new_task->active_act_count = 0;
+ new_task->thread_count = 0;
+ new_task->active_thread_count = 0;
new_task->user_stop_count = 0;
new_task->role = TASK_UNSPECIFIED;
new_task->active = TRUE;
- new_task->kernel_loaded = kernel_loaded;
- new_task->user_data = 0;
+ new_task->halting = FALSE;
+ new_task->user_data = NULL;
new_task->faults = 0;
new_task->cow_faults = 0;
new_task->pageins = 0;
new_task->messages_sent = 0;
new_task->messages_received = 0;
new_task->syscalls_mach = 0;
+ new_task->priv_flags = 0;
new_task->syscalls_unix=0;
- new_task->csw=0;
- new_task->dynamic_working_set = 0;
-
- task_working_set_create(new_task, TWS_SMALL_HASH_LINE_COUNT,
- 0, TWS_HASH_STYLE_DEFAULT);
+ new_task->c_switch = new_task->p_switch = new_task->ps_switch = 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 = 0;
+ new_task->bsd_info = NULL;
#endif /* MACH_BSD */
-#if TASK_SWAPPER
- new_task->swap_state = TASK_SW_IN;
- new_task->swap_flags = 0;
- new_task->swap_ast_waiting = 0;
- new_task->swap_stamp = sched_tick;
- new_task->swap_rss = 0;
- new_task->swap_nswap = 0;
-#endif /* TASK_SWAPPER */
+#if defined(__i386__) || defined(__x86_64__)
+ new_task->i386_ldt = 0;
+ new_task->task_debug = NULL;
+#endif
+
queue_init(&new_task->semaphore_list);
queue_init(&new_task->lock_set_list);
new_task->semaphores_owned = 0;
new_task->lock_sets_owned = 0;
-#if MACH_HOST
- new_task->may_assign = TRUE;
- new_task->assign_active = FALSE;
-#endif /* MACH_HOST */
- eml_task_reference(new_task, parent_task);
+#if CONFIG_MACF_MACH
+ new_task->label = labelh_new(1);
+ mac_task_label_init (&new_task->maclabel);
+#endif
ipc_task_init(new_task, parent_task);
- new_task->total_user_time.seconds = 0;
- new_task->total_user_time.microseconds = 0;
- new_task->total_system_time.seconds = 0;
- new_task->total_system_time.microseconds = 0;
+ new_task->total_user_time = 0;
+ new_task->total_system_time = 0;
- task_prof_init(new_task);
+ new_task->vtimers = 0;
- if (parent_task != TASK_NULL) {
-#if MACH_HOST
- /*
- * Freeze the parent, so that parent_task->processor_set
- * cannot change.
- */
- task_freeze(parent_task);
-#endif /* MACH_HOST */
- pset = parent_task->processor_set;
- if (!pset->active)
- pset = &default_pset;
+ new_task->shared_region = NULL;
+
+ 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;
+
+ /* inherit the parent's shared region */
+ shared_region = vm_shared_region_get(parent_task);
+ vm_shared_region_set(new_task, shared_region);
- shared_region_mapping_ref(parent_task->system_shared_region);
- new_task->system_shared_region = parent_task->system_shared_region;
+ 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;
- 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 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 {
- pset = &default_pset;
-
new_task->sec_token = KERNEL_SECURITY_TOKEN;
- new_task->wired_ledger_port = ledger_copy(root_wired_ledger);
- new_task->paged_ledger_port = ledger_copy(root_paged_ledger);
+ new_task->audit_token = KERNEL_AUDIT_TOKEN;
+#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 = MINPRI_KERNEL;
+ new_task->priority = BASEPRI_KERNEL;
new_task->max_priority = MAXPRI_KERNEL;
}
else {
new_task->max_priority = MAXPRI_USER;
}
- pset_lock(pset);
- pset_add_task(pset, new_task);
- pset_unlock(pset);
-#if MACH_HOST
- if (parent_task != TASK_NULL)
- task_unfreeze(parent_task);
-#endif /* MACH_HOST */
+ bzero(&new_task->extmod_statistics, sizeof(new_task->extmod_statistics));
+
+ lck_mtx_lock(&tasks_threads_lock);
+ queue_enter(&tasks, new_task, task_t, tasks);
+ tasks_count++;
+ lck_mtx_unlock(&tasks_threads_lock);
-#if FAST_TAS
- if (inherit_memory) {
- new_task->fast_tas_base = parent_task->fast_tas_base;
- new_task->fast_tas_end = parent_task->fast_tas_end;
- } else {
- new_task->fast_tas_base = (vm_offset_t)0;
- new_task->fast_tas_end = (vm_offset_t)0;
- }
-#endif /* FAST_TAS */
+ if (vm_backing_store_low && parent_task != NULL)
+ new_task->priv_flags |= (parent_task->priv_flags&VM_BACKING_STORE_PRIV);
ipc_task_enable(new_task);
-#if TASK_SWAPPER
- task_swapout_eligible(new_task);
-#endif /* TASK_SWAPPER */
-
-#if MACH_ASSERT
- if (watchacts & WA_TASK)
- printf("*** task_create_local(par=%x inh=%x) == 0x%x\n",
- parent_task, inherit_memory, new_task);
-#endif /* MACH_ASSERT */
-
*child_task = new_task;
return(KERN_SUCCESS);
}
/*
- * task_deallocate
+ * task_deallocate:
*
- * Drop a reference on a task
- * Task is locked.
+ * Drop a reference on a task.
*/
void
task_deallocate(
task_t task)
{
- processor_set_t pset;
- int refs;
+ ledger_amount_t credit, debit;
if (task == TASK_NULL)
return;
- task_lock(task);
- refs = --task->ref_count;
- task_unlock(task);
-
- if (refs > 0)
+ if (task_deallocate_internal(task) > 0)
return;
-#if TASK_SWAPPER
- /* task_terminate guarantees that this task is off the list */
- assert((task->swap_state & TASK_SW_ELIGIBLE) == 0);
-#endif /* TASK_SWAPPER */
+ lck_mtx_lock(&tasks_threads_lock);
+ queue_remove(&terminated_tasks, task, task_t, tasks);
+ lck_mtx_unlock(&tasks_threads_lock);
- eml_task_deallocate(task);
+ /*
+ * Give the machine dependent code a chance
+ * to perform cleanup before ripping apart
+ * the task.
+ */
+ machine_task_terminate(task);
ipc_task_terminate(task);
-#if MACH_HOST
- task_freeze(task);
-#endif
-
- pset = task->processor_set;
- pset_lock(pset);
- pset_remove_task(pset,task);
- pset_unlock(pset);
- pset_deallocate(pset);
+ if (task->affinity_space)
+ task_affinity_deallocate(task);
-#if MACH_HOST
- task_unfreeze(task);
-#endif
-
- if (task->kernel_loaded)
- vm_map_remove(kernel_map, task->map->min_offset,
- task->map->max_offset, VM_MAP_NO_FLAGS);
vm_map_deallocate(task->map);
is_release(task->itk_space);
- task_prof_deallocate(task);
- zfree(task_zone, (vm_offset_t) task);
-}
+ lck_mtx_destroy(&task->lock, &task_lck_grp);
-void
-task_reference(
- task_t task)
-{
- if (task != TASK_NULL) {
- task_lock(task);
- task->ref_count++;
- task_unlock(task);
+#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);
}
-boolean_t
-task_reference_try(
- task_t task)
+/*
+ * task_name_deallocate:
+ *
+ * Drop a reference on a task name.
+ */
+void
+task_name_deallocate(
+ task_name_t task_name)
{
- if (task != TASK_NULL) {
- if (task_lock_try(task)) {
- task->ref_count++;
- task_unlock(task);
- return TRUE;
- }
- }
- return FALSE;
+ return(task_deallocate((task_t)task_name));
}
+
/*
* task_terminate:
*
task_t task)
{
if (task == TASK_NULL)
- return(KERN_INVALID_ARGUMENT);
+ return (KERN_INVALID_ARGUMENT);
+
if (task->bsd_info)
- return(KERN_FAILURE);
+ return (KERN_FAILURE);
+
return (task_terminate_internal(task));
}
kern_return_t
task_terminate_internal(
- task_t task)
+ task_t task)
{
- thread_act_t thr_act, cur_thr_act;
- task_t cur_task;
- boolean_t interrupt_save;
+ thread_t thread, self;
+ task_t self_task;
+ boolean_t interrupt_save;
assert(task != kernel_task);
- cur_thr_act = current_act();
- cur_task = cur_thr_act->task;
-
-#if TASK_SWAPPER
- /*
- * If task is not resident (swapped out, or being swapped
- * out), we want to bring it back in (this can block).
- * NOTE: The only way that this can happen in the current
- * system is if the task is swapped while it has a thread
- * in exit(), and the thread does not hit a clean point
- * to swap itself before getting here.
- * Terminating other tasks is another way to this code, but
- * it is not yet fully supported.
- * The task_swapin is unconditional. It used to be done
- * only if the task is not resident. Swapping in a
- * resident task will prevent it from being swapped out
- * while it terminates.
- */
- task_swapin(task, TRUE); /* TRUE means make it unswappable */
-#endif /* TASK_SWAPPER */
+ self = current_thread();
+ self_task = self->task;
/*
* Get the task locked and make sure that we are not racing
* with someone else trying to terminate us.
*/
- if (task == cur_task) {
+ if (task == self_task)
task_lock(task);
- } else if (task < cur_task) {
+ else
+ if (task < self_task) {
task_lock(task);
- task_lock(cur_task);
- } else {
- task_lock(cur_task);
+ task_lock(self_task);
+ }
+ else {
+ task_lock(self_task);
task_lock(task);
}
- if (!task->active || !cur_thr_act->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.
*/
task_unlock(task);
- if (cur_task != task)
- task_unlock(cur_task);
- return(KERN_FAILURE);
+ if (self_task != task)
+ task_unlock(self_task);
+
+ return (KERN_FAILURE);
}
- if (cur_task != task)
- task_unlock(cur_task);
+
+ if (self_task != task)
+ task_unlock(self_task);
/*
* Make sure the current thread does not get aborted out of
ipc_task_disable(task);
/*
- * Terminate each activation in the task.
- *
- * Each terminated activation will run it's special handler
- * when its current kernel context is unwound. That will
- * clean up most of the thread resources. Then it will be
- * handed over to the reaper, who will finally remove the
- * thread from the task list and free the structures.
- */
- queue_iterate(&task->thr_acts, thr_act, thread_act_t, thr_acts) {
- thread_terminate_internal(thr_act);
+ * Terminate each thread in the task.
+ */
+ queue_iterate(&task->threads, thread, thread_t, task_threads) {
+ thread_terminate_internal(thread);
}
+ task_unlock(task);
+
+#if CONFIG_EMBEDDED
/*
- * Clean up any virtual machine state/resources associated
- * with the current activation because it may hold wiring
- * and other references on resources we will be trying to
- * release below.
+ * remove all task watchers
*/
- if (cur_thr_act->task == task)
- act_virtual_machine_destroy(cur_thr_act);
-
- 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.
*/
- if (!task->kernel_loaded)
- ipc_space_destroy(task->itk_space);
+ ipc_space_terminate(task->itk_space);
+
+ if (vm_map_has_4GB_pagezero(task->map))
+ vm_map_clear_4GB_pagezero(task->map);
/*
* If the current thread is a member of the task
* expense of removing the address space regions
* at reap time, we do it explictly here.
*/
- (void) vm_map_remove(task->map,
- task->map->min_offset,
- task->map->max_offset, VM_MAP_NO_FLAGS);
+ vm_map_remove(task->map,
+ task->map->min_offset,
+ task->map->max_offset,
+ VM_MAP_NO_FLAGS);
- shared_region_mapping_dealloc(task->system_shared_region);
+ /* release our shared region */
+ vm_shared_region_set(task, NULL);
- if(task->dynamic_working_set)
- tws_hash_destroy((tws_hash_t)task->dynamic_working_set);
+ lck_mtx_lock(&tasks_threads_lock);
+ queue_remove(&tasks, task, task_t, tasks);
+ queue_enter(&terminated_tasks, task, task_t, tasks);
+ tasks_count--;
+ lck_mtx_unlock(&tasks_threads_lock);
/*
* We no longer need to guard against being aborted, so restore
*/
task_deallocate(task);
- return(KERN_SUCCESS);
+ return (KERN_SUCCESS);
}
/*
- * task_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.
+ * 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 and mark all other threads in the task for
+ * termination.
*/
kern_return_t
-task_halt(
+task_start_halt(
task_t task)
{
- thread_act_t thr_act, cur_thr_act;
- task_t cur_task;
+ thread_t thread, self;
assert(task != kernel_task);
- cur_thr_act = current_act();
- cur_task = cur_thr_act->task;
-
- if (task != cur_task) {
- return(KERN_INVALID_ARGUMENT);
- }
+ self = current_thread();
-#if TASK_SWAPPER
- /*
- * If task is not resident (swapped out, or being swapped
- * out), we want to bring it back in and make it unswappable.
- * This can block, so do it early.
- */
- task_swapin(task, TRUE); /* TRUE means make it unswappable */
-#endif /* TASK_SWAPPER */
+ if (task != self->task)
+ return (KERN_INVALID_ARGUMENT);
task_lock(task);
- if (!task->active || !cur_thr_act->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
* ourselves.
*/
task_unlock(task);
- return(KERN_FAILURE);
+
+ return (KERN_FAILURE);
}
- if (task->thr_act_count > 1) {
+ 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_hold_locked(task);
/*
- * Terminate all the other activations in the task.
- *
- * Each terminated activation will run it's special handler
- * when its current kernel context is unwound. That will
- * clean up most of the thread resources. Then it will be
- * handed over to the reaper, who will finally remove the
- * thread from the task list and free the structures.
+ * Terminate all the other threads in the task.
*/
- queue_iterate(&task->thr_acts, thr_act, thread_act_t,thr_acts) {
- if (thr_act != cur_thr_act)
- thread_terminate_internal(thr_act);
+ queue_iterate(&task->threads, thread, thread_t, task_threads) {
+ if (thread != self)
+ thread_terminate_internal(thread);
}
+
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());
/*
- * If the current thread has any virtual machine state
- * associated with it, we need to explicitly clean that
- * up now (because we did not terminate the current act)
- * before we try to clean up the task VM and port spaces.
+ * Wait for the other threads to get shut down.
+ * When the last other thread is reaped, we'll be
+ * woken up.
*/
- act_virtual_machine_destroy(cur_thr_act);
+ 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.
* Destroy the contents of the IPC space, leaving just
* a reference for it.
*/
- if (!task->kernel_loaded)
- ipc_space_clean(task->itk_space);
+ ipc_space_clean(task->itk_space);
/*
* Clean out the address space, as we are going to be
* getting a new one.
*/
- (void) vm_map_remove(task->map,
- task->map->min_offset,
- task->map->max_offset, VM_MAP_NO_FLAGS);
+ vm_map_remove(task->map, task->map->min_offset,
+ task->map->max_offset, VM_MAP_NO_FLAGS);
- return KERN_SUCCESS;
+ task->halting = FALSE;
}
/*
*/
void
task_hold_locked(
- register task_t task)
+ register task_t task)
{
- register thread_act_t thr_act;
+ register thread_t thread;
assert(task->active);
return;
/*
- * Iterate through all the thread_act's and hold them.
+ * Iterate through all the threads and hold them.
*/
- queue_iterate(&task->thr_acts, thr_act, thread_act_t, thr_acts) {
- act_lock_thread(thr_act);
- thread_hold(thr_act);
- act_unlock_thread(thr_act);
+ queue_iterate(&task->threads, thread, thread_t, task_threads) {
+ thread_mtx_lock(thread);
+ thread_hold(thread);
+ thread_mtx_unlock(thread);
}
}
* CONDITIONS: the caller holds a reference on the task
*/
kern_return_t
-task_hold(task_t task)
+task_hold(
+ register task_t task)
+{
+ if (task == TASK_NULL)
+ return (KERN_INVALID_ARGUMENT);
+
+ task_lock(task);
+
+ if (!task->active) {
+ task_unlock(task);
+
+ return (KERN_FAILURE);
+ }
+
+ task_hold_locked(task);
+ task_unlock(task);
+
+ return (KERN_SUCCESS);
+}
+
+kern_return_t
+task_wait(
+ task_t task,
+ boolean_t until_not_runnable)
{
- kern_return_t kret;
-
if (task == TASK_NULL)
return (KERN_INVALID_ARGUMENT);
+
task_lock(task);
+
if (!task->active) {
task_unlock(task);
+
return (KERN_FAILURE);
}
- task_hold_locked(task);
- task_unlock(task);
- return(KERN_SUCCESS);
+ task_wait_locked(task, until_not_runnable);
+ task_unlock(task);
+
+ return (KERN_SUCCESS);
}
/*
- * Routine: task_wait_locked
+ * task_wait_locked:
+ *
* Wait for all threads in task to stop.
*
* Conditions:
*/
void
task_wait_locked(
- register task_t task)
+ register task_t task,
+ boolean_t until_not_runnable)
{
- register thread_act_t thr_act, cur_thr_act;
+ register thread_t thread, self;
assert(task->active);
assert(task->suspend_count > 0);
- cur_thr_act = current_act();
+ self = current_thread();
+
/*
- * Iterate through all the thread's and wait for them to
+ * Iterate through all the threads and wait for them to
* stop. Do not wait for the current thread if it is within
* the task.
*/
- queue_iterate(&task->thr_acts, thr_act, thread_act_t, thr_acts) {
- if (thr_act != cur_thr_act) {
- thread_shuttle_t thr_shuttle;
-
- thr_shuttle = act_lock_thread(thr_act);
- thread_wait(thr_shuttle);
- act_unlock_thread(thr_act);
- }
+ queue_iterate(&task->threads, thread, thread_t, task_threads) {
+ if (thread != self)
+ thread_wait(thread, until_not_runnable);
}
}
*/
void
task_release_locked(
- register task_t task)
+ register task_t task)
{
- register thread_act_t thr_act;
+ register thread_t thread;
assert(task->active);
assert(task->suspend_count > 0);
if (--task->suspend_count > 0)
return;
- /*
- * Iterate through all the thread_act's and hold them.
- * Do not hold the current thread_act if it is within the
- * task.
- */
- queue_iterate(&task->thr_acts, thr_act, thread_act_t, thr_acts) {
- act_lock_thread(thr_act);
- thread_release(thr_act);
- act_unlock_thread(thr_act);
+ queue_iterate(&task->threads, thread, thread_t, task_threads) {
+ thread_mtx_lock(thread);
+ thread_release(thread);
+ thread_mtx_unlock(thread);
}
}
* CONDITIONS: The caller holds a reference to the task
*/
kern_return_t
-task_release(task_t task)
+task_release(
+ task_t task)
{
- kern_return_t kret;
-
if (task == TASK_NULL)
return (KERN_INVALID_ARGUMENT);
+
task_lock(task);
+
if (!task->active) {
task_unlock(task);
+
return (KERN_FAILURE);
}
- task_release_locked(task);
- task_unlock(task);
- return(KERN_SUCCESS);
+ task_release_locked(task);
+ task_unlock(task);
+
+ return (KERN_SUCCESS);
}
kern_return_t
task_threads(
- task_t task,
- thread_act_array_t *thr_act_list,
+ task_t task,
+ thread_act_array_t *threads_out,
mach_msg_type_number_t *count)
{
- unsigned int actual; /* this many thr_acts */
- thread_act_t thr_act;
- thread_act_t *thr_acts;
- thread_t thread;
- int i, j;
-
- vm_size_t size, size_needed;
- vm_offset_t addr;
+ mach_msg_type_number_t actual;
+ thread_t *thread_list;
+ thread_t thread;
+ vm_size_t size, size_needed;
+ void *addr;
+ unsigned int i, j;
if (task == TASK_NULL)
- return KERN_INVALID_ARGUMENT;
+ return (KERN_INVALID_ARGUMENT);
- size = 0; addr = 0;
+ size = 0; addr = NULL;
for (;;) {
task_lock(task);
if (!task->active) {
task_unlock(task);
+
if (size != 0)
kfree(addr, size);
- return KERN_FAILURE;
+
+ return (KERN_FAILURE);
}
- actual = task->thr_act_count;
+ actual = task->thread_count;
/* do we have the memory we need? */
- size_needed = actual * sizeof(mach_port_t);
+ size_needed = actual * sizeof (mach_port_t);
if (size_needed <= size)
break;
addr = kalloc(size);
if (addr == 0)
- return KERN_RESOURCE_SHORTAGE;
+ return (KERN_RESOURCE_SHORTAGE);
}
/* OK, have memory and the task is locked & active */
- thr_acts = (thread_act_t *) addr;
-
- for (i = j = 0, thr_act = (thread_act_t) queue_first(&task->thr_acts);
- i < actual;
- i++, thr_act = (thread_act_t) queue_next(&thr_act->thr_acts)) {
- act_lock(thr_act);
- if (thr_act->ref_count > 0) {
- act_locked_act_reference(thr_act);
- thr_acts[j++] = thr_act;
- }
- act_unlock(thr_act);
+ thread_list = (thread_t *)addr;
+
+ i = j = 0;
+
+ for (thread = (thread_t)queue_first(&task->threads); i < actual;
+ ++i, thread = (thread_t)queue_next(&thread->task_threads)) {
+ thread_reference_internal(thread);
+ thread_list[j++] = thread;
}
- assert(queue_end(&task->thr_acts, (queue_entry_t) thr_act));
+
+ assert(queue_end(&task->threads, (queue_entry_t)thread));
actual = j;
- size_needed = actual * sizeof(mach_port_t);
+ size_needed = actual * sizeof (mach_port_t);
- /* can unlock task now that we've got the thr_act refs */
+ /* can unlock task now that we've got the thread refs */
task_unlock(task);
if (actual == 0) {
- /* no thr_acts, so return null pointer and deallocate memory */
+ /* no threads, so return null pointer and deallocate memory */
- *thr_act_list = 0;
+ *threads_out = NULL;
*count = 0;
if (size != 0)
kfree(addr, size);
- } else {
+ }
+ else {
/* if we allocated too much, must copy */
if (size_needed < size) {
- vm_offset_t newaddr;
+ void *newaddr;
newaddr = kalloc(size_needed);
if (newaddr == 0) {
- for (i = 0; i < actual; i++)
- act_deallocate(thr_acts[i]);
+ for (i = 0; i < actual; ++i)
+ thread_deallocate(thread_list[i]);
kfree(addr, size);
- return KERN_RESOURCE_SHORTAGE;
+ return (KERN_RESOURCE_SHORTAGE);
}
- bcopy((char *) addr, (char *) newaddr, size_needed);
+ bcopy(addr, newaddr, size_needed);
kfree(addr, size);
- thr_acts = (thread_act_t *) newaddr;
+ thread_list = (thread_t *)newaddr;
}
- *thr_act_list = thr_acts;
+ *threads_out = thread_list;
*count = actual;
/* do the conversion that Mig should handle */
- for (i = 0; i < actual; i++)
- ((ipc_port_t *) thr_acts)[i] =
- convert_act_to_port(thr_acts[i]);
+ for (i = 0; i < actual; ++i)
+ ((ipc_port_t *) thread_list)[i] = convert_thread_to_port(thread_list[i]);
}
- return KERN_SUCCESS;
+ return (KERN_SUCCESS);
}
-/*
- * Routine: 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)
- return (KERN_INVALID_ARGUMENT);
-
- task_lock(task);
+{
if (!task->active) {
- task_unlock(task);
return (KERN_FAILURE);
}
- if ((task->user_stop_count)++ > 0) {
+
+ if (task->user_stop_count++ > 0) {
/*
* 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_unlock(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 (kr);
+}
+
/*
- * Routine: task_resume
+ * task_resume:
* Release a kernel hold on a task.
*
* Conditions:
* The caller holds a reference to the task
*/
kern_return_t
-task_resume(register task_t task)
+task_resume(
+ register task_t task)
{
- register boolean_t release;
+ kern_return_t kr;
- if (task == TASK_NULL)
- return(KERN_INVALID_ARGUMENT);
+ if (task == TASK_NULL || task == kernel_task)
+ return (KERN_INVALID_ARGUMENT);
- release = FALSE;
task_lock(task);
- if (!task->active) {
- task_unlock(task);
- return(KERN_FAILURE);
+
+ kr = release_task_hold(task, FALSE);
+
+ 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);
- return(KERN_FAILURE);
+out:
+ return(kr);
+}
+
+
+/*
+ * 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,
task_t task,
security_token_t sec_token,
+ audit_token_t audit_token,
host_priv_t host_priv)
{
+ ipc_port_t host_port;
kern_return_t kr;
if (task == TASK_NULL)
task_lock(task);
task->sec_token = sec_token;
+ task->audit_token = audit_token;
task_unlock(task);
if (host_priv != HOST_PRIV_NULL) {
- kr = task_set_special_port(task,
- TASK_HOST_PORT,
- ipc_port_make_send(realhost.host_priv_self));
+ kr = host_get_host_priv_port(host_priv, &host_port);
} else {
- kr = task_set_special_port(task,
- TASK_HOST_PORT,
- ipc_port_make_send(realhost.host_self));
+ kr = host_get_host_port(host_priv_self(), &host_port);
}
+ assert(kr == KERN_SUCCESS);
+ kr = task_set_special_port(task, TASK_HOST_PORT, host_port);
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_set_info(
task_t task,
task_flavor_t flavor,
- task_info_t task_info_in, /* pointer to IN array */
- mach_msg_type_number_t task_info_count)
+ __unused task_info_t task_info_in, /* pointer to IN array */
+ __unused mach_msg_type_number_t task_info_count)
{
- vm_map_t map;
-
if (task == TASK_NULL)
return(KERN_INVALID_ARGUMENT);
kern_return_t
task_info(
- task_t task,
- task_flavor_t flavor,
- task_info_t task_info_out,
+ task_t task,
+ task_flavor_t flavor,
+ task_info_t task_info_out,
mach_msg_type_number_t *task_info_count)
{
- thread_t thread;
- vm_map_t map;
+ kern_return_t error = KERN_SUCCESS;
if (task == TASK_NULL)
- return(KERN_INVALID_ARGUMENT);
+ return (KERN_INVALID_ARGUMENT);
- switch (flavor) {
+ task_lock(task);
+
+ if ((task != current_task()) && (!task->active)) {
+ task_unlock(task);
+ return (KERN_INVALID_ARGUMENT);
+ }
- case TASK_BASIC_INFO:
- {
- register task_basic_info_t basic_info;
+ switch (flavor) {
- if (*task_info_count < TASK_BASIC_INFO_COUNT) {
- return(KERN_INVALID_ARGUMENT);
+ case TASK_BASIC_INFO_32:
+ case TASK_BASIC2_INFO_32:
+ {
+ task_basic_info_32_t basic_info;
+ vm_map_t map;
+ clock_sec_t secs;
+ clock_usec_t usecs;
+
+ if (*task_info_count < TASK_BASIC_INFO_32_COUNT) {
+ error = KERN_INVALID_ARGUMENT;
+ break;
}
- basic_info = (task_basic_info_t) task_info_out;
-
- map = (task == kernel_task) ? kernel_map : task->map;
+ basic_info = (task_basic_info_32_t)task_info_out;
- basic_info->virtual_size = map->size;
- basic_info->resident_size = pmap_resident_count(map->pmap)
- * PAGE_SIZE;
+ map = (task == kernel_task)? kernel_map: task->map;
+ basic_info->virtual_size = (typeof(basic_info->virtual_size))map->size;
+ if (flavor == TASK_BASIC2_INFO_32) {
+ /*
+ * The "BASIC2" flavor gets the maximum resident
+ * size instead of the current resident size...
+ */
+ basic_info->resident_size = pmap_resident_max(map->pmap);
+ } else {
+ basic_info->resident_size = pmap_resident_count(map->pmap);
+ }
+ 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;
- basic_info->user_time.seconds
- = task->total_user_time.seconds;
- basic_info->user_time.microseconds
- = task->total_user_time.microseconds;
- basic_info->system_time.seconds
- = task->total_system_time.seconds;
- basic_info->system_time.microseconds
- = task->total_system_time.microseconds;
- task_unlock(task);
- *task_info_count = TASK_BASIC_INFO_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 = TASK_BASIC_INFO_32_COUNT;
break;
- }
+ }
- case TASK_THREAD_TIMES_INFO:
- {
- register task_thread_times_info_t times_info;
- register thread_t thread;
- register thread_act_t thr_act;
+ case TASK_BASIC_INFO_64:
+ {
+ task_basic_info_64_t basic_info;
+ vm_map_t map;
+ clock_sec_t secs;
+ clock_usec_t usecs;
- if (*task_info_count < TASK_THREAD_TIMES_INFO_COUNT) {
- return (KERN_INVALID_ARGUMENT);
+ if (*task_info_count < TASK_BASIC_INFO_64_COUNT) {
+ error = KERN_INVALID_ARGUMENT;
+ break;
}
- times_info = (task_thread_times_info_t) task_info_out;
- times_info->user_time.seconds = 0;
- times_info->user_time.microseconds = 0;
- times_info->system_time.seconds = 0;
- times_info->system_time.microseconds = 0;
+ basic_info = (task_basic_info_64_t)task_info_out;
- task_lock(task);
- queue_iterate(&task->thr_acts, thr_act,
- thread_act_t, thr_acts)
- {
- time_value_t user_time, system_time;
- spl_t s;
+ 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))
+ * PAGE_SIZE_64;
- thread = act_lock_thread(thr_act);
+ basic_info->policy = ((task != kernel_task)?
+ POLICY_TIMESHARE: POLICY_RR);
+ basic_info->suspend_count = task->user_stop_count;
- /* JMM - add logic to skip threads that have migrated
- * into this 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;
- assert(thread); /* Must have thread */
- s = splsched();
- thread_lock(thread);
+ 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;
- thread_read_times(thread, &user_time, &system_time);
+ *task_info_count = TASK_BASIC_INFO_64_COUNT;
+ break;
+ }
- thread_unlock(thread);
- splx(s);
- act_unlock_thread(thr_act);
+ case MACH_TASK_BASIC_INFO:
+ {
+ mach_task_basic_info_t basic_info;
+ vm_map_t map;
+ clock_sec_t secs;
+ clock_usec_t usecs;
- time_value_add(×_info->user_time, &user_time);
- time_value_add(×_info->system_time, &system_time);
+ if (*task_info_count < MACH_TASK_BASIC_INFO_COUNT) {
+ error = KERN_INVALID_ARGUMENT;
+ break;
}
- task_unlock(task);
+
+ 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) {
+ error = KERN_INVALID_ARGUMENT;
+ break;
+ }
+
+ times_info = (task_thread_times_info_t) task_info_out;
+ times_info->user_time.seconds = 0;
+ times_info->user_time.microseconds = 0;
+ times_info->system_time.seconds = 0;
+ times_info->system_time.microseconds = 0;
+
+
+ queue_iterate(&task->threads, thread, thread_t, task_threads) {
+ time_value_t user_time, system_time;
+
+ thread_read_times(thread, &user_time, &system_time);
+
+ time_value_add(×_info->user_time, &user_time);
+ time_value_add(×_info->system_time, &system_time);
+ }
+
*task_info_count = TASK_THREAD_TIMES_INFO_COUNT;
break;
- }
+ }
+
+ case TASK_ABSOLUTETIME_INFO:
+ {
+ task_absolutetime_info_t info;
+ register thread_t thread;
- case TASK_SCHED_FIFO_INFO:
- {
+ if (*task_info_count < TASK_ABSOLUTETIME_INFO_COUNT) {
+ error = KERN_INVALID_ARGUMENT;
+ break;
+ }
- if (*task_info_count < POLICY_FIFO_BASE_COUNT)
- return(KERN_INVALID_ARGUMENT);
+ info = (task_absolutetime_info_t)task_info_out;
+ info->threads_user = info->threads_system = 0;
- return(KERN_INVALID_POLICY);
- }
- case TASK_SCHED_RR_INFO:
- {
+ 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);
+ 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_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) {
+ error = KERN_INVALID_ARGUMENT;
+ break;
+ }
+
+ 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 = tick / 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;
- }
+ }
- case TASK_SCHED_TIMESHARE_INFO:
- {
+ /* OBSOLETE */
+ case TASK_SCHED_TIMESHARE_INFO:
+ {
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;
- }
+ }
- case TASK_SECURITY_TOKEN:
- {
- register security_token_t *sec_token_p;
+ case TASK_SECURITY_TOKEN:
+ {
+ register security_token_t *sec_token_p;
if (*task_info_count < TASK_SECURITY_TOKEN_COUNT) {
- return(KERN_INVALID_ARGUMENT);
+ 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;
- }
+ break;
+ }
+
+ case TASK_AUDIT_TOKEN:
+ {
+ register audit_token_t *audit_token_p;
+
+ if (*task_info_count < TASK_AUDIT_TOKEN_COUNT) {
+ error = KERN_INVALID_ARGUMENT;
+ break;
+ }
+
+ audit_token_p = (audit_token_t *) task_info_out;
+
+ *audit_token_p = task->audit_token;
+
+ *task_info_count = TASK_AUDIT_TOKEN_COUNT;
+ break;
+ }
- case TASK_SCHED_INFO:
- return(KERN_INVALID_ARGUMENT);
+ case TASK_SCHED_INFO:
+ error = KERN_INVALID_ARGUMENT;
+ break;
- case TASK_EVENTS_INFO:
- {
+ 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);
+ 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->cow_faults = task->cow_faults;
events_info->messages_received = task->messages_received;
events_info->syscalls_mach = task->syscalls_mach;
events_info->syscalls_unix = task->syscalls_unix;
- events_info->csw = task->csw;
- task_unlock(task);
+
+ events_info->csw = task->c_switch;
+
+ queue_iterate(&task->threads, thread, thread_t, task_threads) {
+ events_info->csw += thread->c_switch;
+ events_info->syscalls_mach += thread->syscalls_mach;
+ events_info->syscalls_unix += thread->syscalls_unix;
+ }
+
*task_info_count = TASK_EVENTS_INFO_COUNT;
break;
- }
+ }
+ case TASK_AFFINITY_TAG_INFO:
+ {
+ if (*task_info_count < TASK_AFFINITY_TAG_INFO_COUNT) {
+ error = KERN_INVALID_ARGUMENT;
+ break;
+ }
- default:
- return (KERN_INVALID_ARGUMENT);
+ error = task_affinity_info(task, task_info_out, task_info_count);
+ break;
+ }
+ default:
+ error = KERN_INVALID_ARGUMENT;
+ }
+
+ task_unlock(task);
+ return (error);
+}
+
+void
+task_vtimer_set(
+ task_t task,
+ integer_t which)
+{
+ thread_t thread;
+ spl_t x;
+
+ /* assert(task == current_task()); */ /* bogus assert 4803227 4807483 */
+
+ task_lock(task);
+
+ task->vtimers |= which;
+
+ switch (which) {
+
+ case TASK_VTIMER_USER:
+ queue_iterate(&task->threads, thread, thread_t, task_threads) {
+ 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;
+ }
+
+ task_unlock(task);
+}
+
+void
+task_vtimer_clear(
+ task_t task,
+ integer_t which)
+{
+ assert(task == current_task());
+
+ task_lock(task);
+
+ task->vtimers &= ~which;
+
+ task_unlock(task);
+}
+
+void
+task_vtimer_update(
+__unused
+ task_t task,
+ integer_t which,
+ uint32_t *microsecs)
+{
+ thread_t thread = current_thread();
+ uint32_t tdelt;
+ clock_sec_t secs;
+ uint64_t tsum;
+
+ assert(task == current_task());
+
+ assert(task->vtimers & which);
+
+ secs = tdelt = 0;
+
+ switch (which) {
+
+ case TASK_VTIMER_USER:
+ 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 = (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 = (uint32_t)(tsum - thread->vtimer_rlim_save);
+ thread->vtimer_rlim_save = tsum;
+ absolutetime_to_microtime(tdelt, &secs, microsecs);
+ break;
}
- return(KERN_SUCCESS);
}
/*
*/
kern_return_t
task_assign(
- task_t task,
- processor_set_t new_pset,
- boolean_t assign_threads)
+ __unused task_t task,
+ __unused processor_set_t new_pset,
+ __unused boolean_t assign_threads)
{
-#ifdef lint
- task++; new_pset++; assign_threads++;
-#endif /* lint */
return(KERN_FAILURE);
}
task_t task,
boolean_t assign_threads)
{
- return (task_assign(task, &default_pset, assign_threads));
+ return (task_assign(task, &pset0, assign_threads));
}
/*
if (!task->active)
return(KERN_FAILURE);
- *pset = task->processor_set;
- pset_reference(*pset);
- return(KERN_SUCCESS);
+ *pset = &pset0;
+
+ return (KERN_SUCCESS);
}
*/
kern_return_t
task_policy(
- task_t task,
- policy_t policy_id,
- policy_base_t base,
- mach_msg_type_number_t count,
- boolean_t set_limit,
- boolean_t change)
+ __unused task_t task,
+ __unused policy_t policy_id,
+ __unused policy_base_t base,
+ __unused mach_msg_type_number_t count,
+ __unused boolean_t set_limit,
+ __unused boolean_t change)
{
return(KERN_FAILURE);
}
*/
kern_return_t
task_set_policy(
- task_t task,
- processor_set_t pset,
- policy_t policy_id,
- policy_base_t base,
- mach_msg_type_number_t base_count,
- policy_limit_t limit,
- mach_msg_type_number_t limit_count,
- boolean_t change)
+ __unused task_t task,
+ __unused processor_set_t pset,
+ __unused policy_t policy_id,
+ __unused policy_base_t base,
+ __unused mach_msg_type_number_t base_count,
+ __unused policy_limit_t limit,
+ __unused mach_msg_type_number_t limit_count,
+ __unused boolean_t change)
{
return(KERN_FAILURE);
}
-/*
- * task_collect_scan:
- *
- * Attempt to free resources owned by tasks.
- */
-
-void
-task_collect_scan(void)
-{
- register task_t task, prev_task;
- processor_set_t pset = &default_pset;
-
- pset_lock(pset);
- pset->ref_count++;
- task = (task_t) queue_first(&pset->tasks);
- while (!queue_end(&pset->tasks, (queue_entry_t) task)) {
- task_lock(task);
- if (task->ref_count > 0) {
-
- task_reference_locked(task);
- task_unlock(task);
-
-#if MACH_HOST
- /*
- * While we still have the pset locked, freeze the task in
- * this pset. That way, when we get back from collecting
- * it, we can dereference the pset_tasks chain for the task
- * and be assured that we are still in this chain.
- */
- task_freeze(task);
-#endif
-
- pset_unlock(pset);
-
- pmap_collect(task->map->pmap);
-
- pset_lock(pset);
- prev_task = task;
- task = (task_t) queue_next(&task->pset_tasks);
-
-#if MACH_HOST
- task_unfreeze(prev_task);
-#endif
-
- task_deallocate(prev_task);
- } else {
- task_unlock(task);
- task = (task_t) queue_next(&task->pset_tasks);
- }
- }
-
- pset_unlock(pset);
-
- pset_deallocate(pset);
-}
-
-/* Also disabled in vm/vm_pageout.c */
-boolean_t task_collect_allowed = FALSE;
-unsigned task_collect_last_tick = 0;
-unsigned task_collect_max_rate = 0; /* in ticks */
-
-/*
- * consider_task_collect:
- *
- * Called by the pageout daemon when the system needs more free pages.
- */
-
-void
-consider_task_collect(void)
-{
- /*
- * By default, don't attempt task collection more frequently
- * than once per second.
- */
-
- if (task_collect_max_rate == 0)
- task_collect_max_rate = (1 << SCHED_TICK_SHIFT) + 1;
-
- if (task_collect_allowed &&
- (sched_tick > (task_collect_last_tick + task_collect_max_rate))) {
- task_collect_last_tick = sched_tick;
- task_collect_scan();
- }
-}
-
+#if FAST_TAS
kern_return_t
task_set_ras_pc(
task_t task,
vm_offset_t pc,
vm_offset_t endpc)
{
-#if FAST_TAS
extern int fast_tas_debug;
if (fast_tas_debug) {
task->fast_tas_end = endpc;
task_unlock(task);
return KERN_SUCCESS;
-
+}
#else /* FAST_TAS */
-#ifdef lint
- task++;
- pc++;
- endpc++;
-#endif /* lint */
-
+kern_return_t
+task_set_ras_pc(
+ __unused task_t task,
+ __unused vm_offset_t pc,
+ __unused vm_offset_t endpc)
+{
return KERN_FAILURE;
-
-#endif /* FAST_TAS */
}
+#endif /* FAST_TAS */
void
task_synchronizer_destroy_all(task_t task)
}
/*
- * task_set_port_space:
- *
- * Set port name space of task to specified size.
+ * 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;
-kern_return_t
-task_set_port_space(
- task_t task,
- int table_entries)
+ 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 kr;
-
- is_write_lock(task->itk_space);
- kr = ipc_entry_grow_table(task->itk_space, table_entries);
- if (kr == KERN_SUCCESS)
- is_write_unlock(task->itk_space);
- return kr;
+ 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
boolean_t is_kerneltask(task_t t)
{
if (t == kernel_task)
- return(TRUE);
- else
- return((t->kernel_loaded));
+ return (TRUE);
+
+ 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()
+task_t current_task(void);
+task_t current_task(void)
{
return (current_task_fast());
}
+
+#undef task_reference
+void task_reference(task_t task);
+void
+task_reference(
+ task_t task)
+{
+ if (task != TASK_NULL)
+ 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
+ * both label handles. The locks do not actually have to be held while
+ * using the labels as only labels with one reference can be modified
+ * in place.
+ */
+
+void
+tasklabel_lock2(
+ task_t a,
+ task_t b)
+{
+ labelh_reference(a->label);
+ labelh_reference(b->label);
+}
+
+void
+tasklabel_unlock2(
+ task_t a,
+ task_t b)
+{
+ labelh_release(a->label);
+ labelh_release(b->label);
+}
+
+void
+mac_task_label_update_internal(
+ struct label *pl,
+ struct task *task)
+{
+
+ tasklabel_lock(task);
+ task->label = labelh_modify(task->label);
+ mac_task_label_update(pl, &task->maclabel);
+ tasklabel_unlock(task);
+ ip_lock(task->itk_self);
+ mac_port_label_update_cred(pl, &task->itk_self->ip_label);
+ ip_unlock(task->itk_self);
+}
+
+void
+mac_task_label_modify(
+ struct task *task,
+ void *arg,
+ void (*f) (struct label *l, void *arg))
+{
+
+ tasklabel_lock(task);
+ task->label = labelh_modify(task->label);
+ (*f)(&task->maclabel, arg);
+ tasklabel_unlock(task);
+}
+
+struct label *
+mac_task_get_label(struct task *task)
+{
+ return (&task->maclabel);
+}
+#endif
projects / apple / xnu.git / blobdiff