X-Git-Url: https://git.saurik.com/apple/xnu.git/blobdiff_plain/5d5c5d0d5b79ade9a973d55186ffda2638ba2b6e..d41d1dae2cd00cc08c7982087d1c445180cad9f5:/osfmk/kern/task.c diff --git a/osfmk/kern/task.c b/osfmk/kern/task.c index c0170408d..c5efca2a7 100644 --- a/osfmk/kern/task.c +++ b/osfmk/kern/task.c @@ -1,31 +1,29 @@ /* - * Copyright (c) 2000-2006 Apple Computer, Inc. All rights reserved. + * Copyright (c) 2000-2009 Apple Inc. All rights reserved. * - * @APPLE_LICENSE_OSREFERENCE_HEADER_START@ + * @APPLE_OSREFERENCE_LICENSE_HEADER_START@ * - * 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. - * - * 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, QUIET ENJOYMENT OR NON-INFRINGEMENT. - * Please see the License for the specific language governing rights and + * 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. + * + * 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, QUIET ENJOYMENT OR NON-INFRINGEMENT. + * Please see the License for the specific language governing rights and * limitations under the License. - * - * @APPLE_LICENSE_OSREFERENCE_HEADER_END@ + * + * @APPLE_OSREFERENCE_LICENSE_HEADER_END@ */ /* * @OSF_FREE_COPYRIGHT@ @@ -80,10 +78,15 @@ * 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 -#include -#include #include #include @@ -114,15 +117,15 @@ #include #include #include -#include #include #include +#include #include #include #include /* for kernel_map, ipc_kernel_map */ #include -#include /* for vm_map_remove_commpage */ +#include #if MACH_KDB #include @@ -133,6 +136,7 @@ #include #endif + /* * Exported interfaces */ @@ -141,12 +145,25 @@ #include #include #include +#include -#include -#include +#include + +#if CONFIG_MACF_MACH +#include +#endif -task_t kernel_task; -zone_t task_zone; +#if CONFIG_COUNTERS +#include +#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; + +int task_max = CONFIG_TASK_MAX; /* Max number of tasks */ /* Forwards */ @@ -166,6 +183,9 @@ kern_return_t task_set_ledger( ledger_t wired, ledger_t paged); +int check_for_tasksuspend( + task_t task); + void task_backing_store_privileged( task_t task) @@ -176,51 +196,52 @@ task_backing_store_privileged( return; } -void -task_working_set_disable(task_t task) -{ - struct tws_hash *ws; - - task_lock(task); - ws = task->dynamic_working_set; - task->dynamic_working_set = NULL; - task_unlock(task); - if (ws) { - tws_hash_ws_flush(ws); - tws_hash_destroy(ws); - } -} void task_set_64bit( task_t task, boolean_t is64bit) { - thread_t thread; +#if defined(__i386__) || defined(__x86_64__) + thread_t thread; +#endif /* __i386__ */ + int vm_flags = 0; if (is64bit) { - if (task_has_64BitAddr(task)) - return; + if (task_has_64BitAddr(task)) + return; - /* LP64todo - no task working set for 64-bit */ task_set_64BitAddr(task); - task_working_set_disable(task); } else { - if ( !task_has_64BitAddr(task)) - return; + if ( !task_has_64BitAddr(task)) + return; /* * Deallocate all memory previously allocated * above the 32-bit address space, since it won't * be accessible anymore. */ - /* LP64todo - make this clean */ - vm_map_remove_commpage(task->map); - pmap_unmap_sharedpage(task->map->pmap); /* Unmap commpage */ + /* remove regular VM map entries & pmap mappings */ (void) vm_map_remove(task->map, (vm_map_offset_t) VM_MAX_ADDRESS, MACH_VM_MAX_ADDRESS, - VM_MAP_NO_FLAGS); + 0); +#ifdef __ppc__ + /* + * 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, + 0xFFFFFFFFFFFFF000ULL, + vm_flags); task_clear_64BitAddr(task); } /* FIXME: On x86, the thread save state flavor can diverge from the @@ -229,81 +250,57 @@ task_set_64bit( * 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) { - machine_thread_switch_addrmode(thread, !is64bit); + thread_mtx_lock(thread); + machine_thread_switch_addrmode(thread); + thread_mtx_unlock(thread); } -#endif + 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); + 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); /* * 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; } -#if MACH_HOST - -#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. - */ - 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); - } - task->may_assign = FALSE; - task_unlock(task); - return; -} -#else -#define thread_freeze(thread) assert(task->processor_set == &default_pset) -#endif - -#if 0 -static void -task_unfreeze( - task_t task) -{ - 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_unlock(task); - return; -} -#else -#define thread_unfreeze(thread) assert(task->processor_set == &default_pset) -#endif - -#endif /* MACH_HOST */ - /* * Create a task running in the kernel address space. It may * have its own map of size mem_size and may have ipc privileges. @@ -320,55 +317,44 @@ kernel_task_create( kern_return_t task_create( - task_t parent_task, + task_t parent_task, __unused ledger_port_array_t ledger_ports, - __unused mach_msg_type_number_t num_ledger_ports, - boolean_t inherit_memory, - task_t *child_task) /* OUT */ + __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_internal( - parent_task, inherit_memory, task_has_64BitAddr(parent_task), 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, - audit_token_t audit_token, - host_priv_t host_priv, + 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, - boolean_t inherit_memory, - task_t *child_task) /* OUT */ + __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_internal( - parent_task, inherit_memory, task_has_64BitAddr(parent_task), child_task); - - if (result != KERN_SUCCESS) - return(result); - - result = host_security_set_task_token(host_security, - *child_task, - sec_token, - audit_token, - host_priv); - - if (result != KERN_SUCCESS) - return(result); - - return(result); + /* + * No longer supported. + */ + return(KERN_FAILURE); } kern_return_t @@ -378,8 +364,8 @@ task_create_internal( 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; new_task = (task_t) zalloc(task_zone); @@ -389,6 +375,7 @@ task_create_internal( /* one ref for just being alive; one for our caller */ new_task->ref_count = 2; + /* if inherit_memory is true, parent_task MUST not be NULL */ if (inherit_memory) new_task->map = vm_map_fork(parent_task->map); else @@ -396,7 +383,11 @@ task_create_internal( (vm_map_offset_t)(VM_MIN_ADDRESS), (vm_map_offset_t)(VM_MAX_ADDRESS), TRUE); - mutex_init(&new_task->lock, 0); + /* 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); + + 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; @@ -404,7 +395,8 @@ task_create_internal( new_task->user_stop_count = 0; new_task->role = TASK_UNSPECIFIED; new_task->active = TRUE; - 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; @@ -413,20 +405,18 @@ task_create_internal( new_task->syscalls_mach = 0; new_task->priv_flags = 0; new_task->syscalls_unix=0; - new_task->csw=0; + 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 */ - new_task->dynamic_working_set = 0; - - task_working_set_create(new_task, TWS_SMALL_HASH_LINE_COUNT, - 0, TWS_HASH_STYLE_DEFAULT); #ifdef MACH_BSD - new_task->bsd_info = 0; + 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__ @@ -438,35 +428,33 @@ task_create_internal( 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 */ +#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 = 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 + if (parent_task != TASK_NULL) { new_task->sec_token = parent_task->sec_token; new_task->audit_token = parent_task->audit_token; - shared_region_mapping_ref(parent_task->system_shared_region); - new_task->system_shared_region = parent_task->system_shared_region; + /* inherit the parent's shared region */ + 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)); @@ -474,19 +462,29 @@ task_create_internal( 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); } else { - pset = &default_pset; - 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->pset_hint = PROCESSOR_SET_NULL; } if (kernel_task == TASK_NULL) { @@ -497,14 +495,11 @@ task_create_internal( new_task->priority = BASEPRI_DEFAULT; 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 */ + + lck_mtx_lock(&tasks_threads_lock); + queue_enter(&tasks, new_task, task_t, tasks); + tasks_count++; + 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); @@ -524,26 +519,25 @@ void task_deallocate( task_t task) { - processor_set_t pset; - if (task == TASK_NULL) return; if (task_deallocate_internal(task) > 0) return; - pset = task->processor_set; - pset_deallocate(pset); - - if(task->dynamic_working_set) - tws_hash_destroy(task->dynamic_working_set); - ipc_task_terminate(task); + if (task->affinity_space) + task_affinity_deallocate(task); + vm_map_deallocate(task->map); is_release(task->itk_space); - task_prof_deallocate(task); + lck_mtx_destroy(&task->lock, &task_lck_grp); + +#if CONFIG_MACF_MACH + labelh_release(task->label); +#endif zfree(task_zone, task); } @@ -584,7 +578,6 @@ kern_return_t task_terminate_internal( task_t task) { - processor_set_t pset; thread_t thread, self; task_t self_task; boolean_t interrupt_save; @@ -672,9 +665,12 @@ task_terminate_internal( */ ipc_space_destroy(task->itk_space); -/* LP64todo - make this clean */ - vm_map_remove_commpage(task->map); +#ifdef __ppc__ + /* + * PPC51: ppc64 is limited to 51-bit addresses. + */ pmap_unmap_sharedpage(task->map->pmap); /* Unmap commpage */ +#endif /* __ppc__ */ if (vm_map_has_4GB_pagezero(task->map)) vm_map_clear_4GB_pagezero(task->map); @@ -687,21 +683,18 @@ task_terminate_internal( * expense of removing the address space regions * at reap time, we do it explictly here. */ - 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); + vm_map_remove(task->map, + task->map->min_offset, + task->map->max_offset, + VM_MAP_NO_FLAGS); - /* - * Flush working set here to avoid I/O in reaper thread - */ - if (task->dynamic_working_set) - tws_hash_ws_flush(task->dynamic_working_set); + /* release our shared region */ + vm_shared_region_set(task, NULL); - pset = task->processor_set; - pset_lock(pset); - pset_remove_task(pset,task); - pset_unlock(pset); + lck_mtx_lock(&tasks_threads_lock); + queue_remove(&tasks, task, task_t, tasks); + tasks_count--; + lck_mtx_unlock(&tasks_threads_lock); /* * We no longer need to guard against being aborted, so restore @@ -722,16 +715,15 @@ task_terminate_internal( } /* - * 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; @@ -745,7 +737,7 @@ task_halt( 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 @@ -757,7 +749,10 @@ task_halt( 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 @@ -776,15 +771,47 @@ task_halt( 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. + * to perform cleanup of task-level resources + * associated with the current thread before + * ripping apart the task. + * + * This must be done with the task locked. */ machine_thread_terminate_self(); - task_unlock(task); + /* + * Wait for the other threads to get shut down. + * When the last other thread is reaped, we'll be + * worken up. + */ + 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); + } /* * Destroy all synchronizers owned by the task. @@ -804,7 +831,7 @@ task_halt( vm_map_remove(task->map, task->map->min_offset, task->map->max_offset, VM_MAP_NO_FLAGS); - return (KERN_SUCCESS); + task->halting = FALSE; } /* @@ -961,7 +988,7 @@ task_threads( mach_msg_type_number_t *count) { mach_msg_type_number_t actual; - thread_t *threads; + thread_t *thread_list; thread_t thread; vm_size_t size, size_needed; void *addr; @@ -970,7 +997,7 @@ task_threads( if (task == TASK_NULL) return (KERN_INVALID_ARGUMENT); - size = 0; addr = 0; + size = 0; addr = NULL; for (;;) { task_lock(task); @@ -1005,14 +1032,14 @@ task_threads( } /* OK, have memory and the task is locked & active */ - threads = (thread_t *)addr; + 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); - threads[j++] = thread; + thread_list[j++] = thread; } assert(queue_end(&task->threads, (queue_entry_t)thread)); @@ -1026,7 +1053,7 @@ task_threads( if (actual == 0) { /* no threads, so return null pointer and deallocate memory */ - *threads_out = 0; + *threads_out = NULL; *count = 0; if (size != 0) @@ -1041,23 +1068,23 @@ task_threads( newaddr = kalloc(size_needed); if (newaddr == 0) { for (i = 0; i < actual; ++i) - thread_deallocate(threads[i]); + thread_deallocate(thread_list[i]); kfree(addr, size); return (KERN_RESOURCE_SHORTAGE); } bcopy(addr, newaddr, size_needed); kfree(addr, size); - threads = (thread_t *)newaddr; + thread_list = (thread_t *)newaddr; } - *threads_out = threads; + *threads_out = thread_list; *count = actual; /* do the conversion that Mig should handle */ for (i = 0; i < actual; ++i) - ((ipc_port_t *) threads)[i] = convert_thread_to_port(threads[i]); + ((ipc_port_t *) thread_list)[i] = convert_thread_to_port(thread_list[i]); } return (KERN_SUCCESS); @@ -1245,40 +1272,61 @@ task_info( 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->resident_size = pmap_resident_count(map->pmap) - * PAGE_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 + * 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; - absolutetime_to_microtime( - task->total_user_time, - &basic_info->user_time.seconds, - &basic_info->user_time.microseconds); - absolutetime_to_microtime( - task->total_system_time, - &basic_info->system_time.seconds, - &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; @@ -1287,32 +1335,36 @@ task_info( 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; 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); + basic_info->resident_size = + (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, - &basic_info->user_time.seconds, - &basic_info->user_time.microseconds); - absolutetime_to_microtime( - task->total_system_time, - &basic_info->system_time.seconds, - &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; @@ -1323,8 +1375,10 @@ task_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; @@ -1332,7 +1386,6 @@ task_info( 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; @@ -1343,7 +1396,6 @@ task_info( time_value_add(×_info->system_time, &system_time); } - task_unlock(task); *task_info_count = TASK_THREAD_TIMES_INFO_COUNT; break; @@ -1354,13 +1406,14 @@ task_info( 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; @@ -1377,20 +1430,36 @@ task_info( info->total_system += tval; } - task_unlock(task); *task_info_count = TASK_ABSOLUTETIME_INFO_COUNT; break; } + case TASK_DYLD_INFO: + { + task_dyld_info_t info; + + if (*task_info_count < TASK_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; + *task_info_count = TASK_DYLD_INFO_COUNT; + break; + } + /* 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; } /* OBSOLETE */ @@ -1398,19 +1467,19 @@ task_info( { register policy_rr_base_t rr_base; - 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; @@ -1423,19 +1492,19 @@ task_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; @@ -1445,14 +1514,14 @@ task_info( { 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; @@ -1462,32 +1531,35 @@ task_info( { 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; 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->cow_faults = task->cow_faults; @@ -1495,18 +1567,133 @@ task_info( 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; + } + *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; + } + + error = task_affinity_info(task, task_info_out, task_info_count); + } default: - return (KERN_INVALID_ARGUMENT); + error = KERN_INVALID_ARGUMENT; + } + + task_unlock(task); + return (error); +} + +void +task_vtimer_set( + task_t task, + integer_t which) +{ + thread_t thread; + + /* 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) { + thread->vtimer_user_save = timer_grab(&thread->user_timer); + } + break; + + case TASK_VTIMER_PROF: + queue_iterate(&task->threads, thread, thread_t, task_threads) { + thread->vtimer_prof_save = timer_grab(&thread->user_timer); + thread->vtimer_prof_save += timer_grab(&thread->system_timer); + } + break; + + case TASK_VTIMER_RLIM: + queue_iterate(&task->threads, thread, thread_t, task_threads) { + thread->vtimer_rlim_save = timer_grab(&thread->user_timer); + thread->vtimer_rlim_save += timer_grab(&thread->system_timer); + } + 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: + tdelt = (uint32_t)timer_delta(&thread->user_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); } /* @@ -1533,7 +1720,7 @@ task_assign_default( task_t task, boolean_t assign_threads) { - return (task_assign(task, &default_pset, assign_threads)); + return (task_assign(task, &pset0, assign_threads)); } /* @@ -1549,9 +1736,9 @@ task_get_assignment( if (!task->active) return(KERN_FAILURE); - *pset = task->processor_set; - pset_reference(*pset); - return(KERN_SUCCESS); + *pset = &pset0; + + return (KERN_SUCCESS); } @@ -1651,6 +1838,70 @@ task_synchronizer_destroy_all(task_t task) } } +/* + * 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 @@ -1664,6 +1915,16 @@ boolean_t is_kerneltask(task_t t) 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) @@ -1680,3 +1941,64 @@ task_reference( if (task != TASK_NULL) task_reference_internal(task); } + +#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