/*
- * Copyright (c) 2000-2010 Apple Inc. All rights reserved.
+ * Copyright (c) 2000-2016 Apple Inc. All rights reserved.
*
* @APPLE_OSREFERENCE_LICENSE_HEADER_START@
*
* Copyright (c) 2005 SPARTA, Inc.
*/
-#include <fast_tas.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/mach_vm.h>
#include <mach/semaphore.h>
#include <mach/task_info.h>
#include <mach/task_special_ports.h>
+#include <mach/sdt.h>
+#include <ipc/ipc_importance.h>
#include <ipc/ipc_types.h>
#include <ipc/ipc_space.h>
#include <ipc/ipc_entry.h>
#include <kern/misc_protos.h>
#include <kern/task.h>
#include <kern/thread.h>
+#include <kern/coalition.h>
#include <kern/zalloc.h>
#include <kern/kalloc.h>
+#include <kern/kern_cdata.h>
#include <kern/processor.h>
#include <kern/sched_prim.h> /* for thread_wakeup */
#include <kern/ipc_tt.h>
#include <kern/sync_lock.h>
#include <kern/affinity.h>
#include <kern/exc_resource.h>
+#include <kern/machine.h>
+#include <kern/policy_internal.h>
+
+#include <corpses/task_corpse.h>
#if CONFIG_TELEMETRY
#include <kern/telemetry.h>
#endif
#include <vm/vm_purgeable_internal.h>
#include <sys/resource.h>
+#include <sys/signalvar.h> /* for coredump */
+
/*
* Exported interfaces
*/
#include <mach/mach_host_server.h>
#include <mach/host_security_server.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>
+#include <libkern/OSDebug.h>
+#include <libkern/OSAtomic.h>
+
+#if CONFIG_ATM
+#include <atm/atm_internal.h>
#endif
-#if CONFIG_COUNTERS
-#include <pmc/pmc.h>
-#endif /* CONFIG_COUNTERS */
+#include <kern/sfi.h> /* picks up ledger.h */
-#include <libkern/OSDebug.h>
-#include <libkern/OSAtomic.h>
+#if CONFIG_MACF
+#include <security/mac_mach_internal.h>
+#endif
+
+#if KPERF
+extern int kpc_force_all_ctrs(task_t, int);
+#endif
task_t kernel_task;
zone_t task_zone;
lck_grp_t task_lck_grp;
lck_grp_attr_t task_lck_grp_attr;
+extern int exc_via_corpse_forking;
+extern int unify_corpse_blob_alloc;
+extern int corpse_for_fatal_memkill;
+
+/* Flag set by core audio when audio is playing. Used to stifle EXC_RESOURCE generation when active. */
+int audio_active = 0;
+
zinfo_usage_store_t tasks_tkm_private;
zinfo_usage_store_t tasks_tkm_shared;
expired_task_statistics_t dead_task_statistics;
lck_spin_t dead_task_statistics_lock;
-static ledger_template_t task_ledger_template = NULL;
-struct _task_ledger_indices task_ledgers __attribute__((used)) = {-1, -1, -1, -1, -1, -1, -1, -1, -1, -1};
+ledger_template_t task_ledger_template = NULL;
+
+struct _task_ledger_indices task_ledgers __attribute__((used)) =
+ {-1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1,
+ { 0 /* initialized at runtime */},
+#ifdef CONFIG_BANK
+ -1, -1,
+#endif
+ -1, -1,
+ };
+
+/* System sleep state */
+boolean_t tasks_suspend_state;
+
+
void init_task_ledgers(void);
void task_footprint_exceeded(int warning, __unused const void *param0, __unused const void *param1);
void task_wakeups_rate_exceeded(int warning, __unused const void *param0, __unused const void *param1);
-void __attribute__((noinline)) THIS_PROCESS_IS_CAUSING_TOO_MANY_WAKEUPS__SENDING_EXC_RESOURCE(void);
-void __attribute__((noinline)) THIS_PROCESS_CROSSED_HIGH_WATERMARK__SENDING_EXC_RESOURCE(int max_footprint_mb);
-int coredump(void *core_proc, int reserve_mb, int ignore_ulimit);
+void task_io_rate_exceeded(int warning, const void *param0, __unused const void *param1);
+void __attribute__((noinline)) SENDING_NOTIFICATION__THIS_PROCESS_IS_CAUSING_TOO_MANY_WAKEUPS(void);
+void __attribute__((noinline)) PROC_CROSSED_HIGH_WATERMARK__SEND_EXC_RESOURCE_AND_SUSPEND(int max_footprint_mb, boolean_t is_fatal);
+void __attribute__((noinline)) SENDING_NOTIFICATION__THIS_PROCESS_IS_CAUSING_TOO_MUCH_IO(int flavor);
kern_return_t task_suspend_internal(task_t);
kern_return_t task_resume_internal(task_t);
+static kern_return_t task_start_halt_locked(task_t task, boolean_t should_mark_corpse);
+int proc_list_uptrs(void *p, uint64_t *udata_buffer, int size);
-void proc_init_cpumon_params(void);
+extern kern_return_t iokit_task_terminate(task_t task);
+
+extern kern_return_t exception_deliver(thread_t, exception_type_t, mach_exception_data_t, mach_msg_type_number_t, struct exception_action *, lck_mtx_t *);
+extern void bsd_copythreadname(void *dst_uth, void *src_uth);
+extern kern_return_t thread_resume(thread_t thread);
// Warn tasks when they hit 80% of their memory limit.
#define PHYS_FOOTPRINT_WARNING_LEVEL 80
int disable_exc_resource; /* Global override to supress EXC_RESOURCE for resource monitor violations. */
-int max_task_footprint = 0; /* Per-task limit on physical memory consumption */
+ledger_amount_t max_task_footprint = 0; /* Per-task limit on physical memory consumption in bytes */
+int max_task_footprint_warning_level = 0; /* Per-task limit warning percentage */
+int max_task_footprint_mb = 0; /* Per-task limit on physical memory consumption in megabytes */
+
+/* I/O Monitor Limits */
+#define IOMON_DEFAULT_LIMIT (20480ull) /* MB of logical/physical I/O */
+#define IOMON_DEFAULT_INTERVAL (86400ull) /* in seconds */
+
+uint64_t task_iomon_limit_mb; /* Per-task I/O monitor limit in MBs */
+uint64_t task_iomon_interval_secs; /* Per-task I/O monitor interval in secs */
+
+#define IO_TELEMETRY_DEFAULT_LIMIT (10ll * 1024ll * 1024ll)
+int64_t io_telemetry_limit; /* Threshold to take a microstackshot (0 indicated I/O telemetry is turned off) */
+int64_t global_logical_writes_count = 0; /* Global count for logical writes */
+static boolean_t global_update_logical_writes(int64_t);
+
+#if MACH_ASSERT
+int pmap_ledgers_panic = 1;
+#endif /* MACH_ASSERT */
+
int task_max = CONFIG_TASK_MAX; /* Max number of tasks */
+#if CONFIG_COREDUMP
int hwm_user_cores = 0; /* high watermark violations generate user core files */
+#endif
#ifdef MACH_BSD
extern void proc_getexecutableuuid(void *, unsigned char *, unsigned long);
extern int proc_pid(struct proc *p);
extern int proc_selfpid(void);
extern char *proc_name_address(struct proc *p);
-#if CONFIG_JETSAM
-extern void memorystatus_on_ledger_footprint_exceeded(int warning, const int max_footprint_mb);
-#endif
-#endif
+extern uint64_t get_dispatchqueue_offset_from_proc(void *);
+
+#if CONFIG_MEMORYSTATUS
+extern void proc_memstat_terminated(struct proc* p, boolean_t set);
+extern boolean_t memorystatus_turnoff_exception_and_get_fatalness(boolean_t warning, const int max_footprint_mb);
+extern void memorystatus_on_ledger_footprint_exceeded(int warning, boolean_t is_fatal);
+#endif /* CONFIG_MEMORYSTATUS */
+
+#endif /* MACH_BSD */
/* Forwards */
-void task_hold_locked(
- task_t task);
-void task_wait_locked(
- task_t task,
- boolean_t until_not_runnable);
-void task_release_locked(
- task_t task);
-void task_free(
- task_t task );
-void task_synchronizer_destroy_all(
- task_t task);
-
-int check_for_tasksuspend(
- task_t task);
+static void task_hold_locked(task_t task);
+static void task_wait_locked(task_t task, boolean_t until_not_runnable);
+static void task_release_locked(task_t task);
+
+static void task_synchronizer_destroy_all(task_t task);
void
task_backing_store_privileged(
task_t task,
boolean_t is64bit)
{
-#if defined(__i386__) || defined(__x86_64__)
+#if defined(__i386__) || defined(__x86_64__) || defined(__arm64__)
thread_t thread;
-#endif /* defined(__i386__) || defined(__x86_64__) */
+#endif /* defined(__i386__) || defined(__x86_64__) || defined(__arm64__) */
task_lock(task);
* state with respect to its task's 64-bitness.
*/
-#if defined(__i386__) || defined(__x86_64__)
+#if defined(__i386__) || defined(__x86_64__) || defined(__arm64__)
queue_iterate(&task->threads, thread, thread_t, task_threads) {
thread_mtx_lock(thread);
machine_thread_switch_addrmode(thread);
thread_mtx_unlock(thread);
+
+ if (thread == current_thread()) {
+ uint64_t arg1, arg2;
+ int urgency;
+ spl_t spl = splsched();
+ /*
+ * This call tell that the current thread changed it's 32bitness.
+ * Other thread were no more on core when 32bitness was changed,
+ * but current_thread() is on core and the previous call to
+ * machine_thread_going_on_core() gave 32bitness which is now wrong.
+ *
+ * This is needed for bring-up, a different callback should be used
+ * in the future.
+ */
+ thread_lock(thread);
+ urgency = thread_get_urgency(thread, &arg1, &arg2);
+ machine_thread_going_on_core(thread, urgency, 0);
+ thread_unlock(thread);
+ splx(spl);
+ }
}
-#endif /* defined(__i386__) || defined(__x86_64__) */
+#endif /* defined(__i386__) || defined(__x86_64__) || defined(__arm64__) */
out:
task_unlock(task);
task_unlock(task);
}
+void
+task_atm_reset(__unused task_t task) {
+
+#if CONFIG_ATM
+ if (task->atm_context != NULL) {
+ atm_task_descriptor_destroy(task->atm_context);
+ task->atm_context = NULL;
+ }
+#endif
+
+}
+
+void
+task_bank_reset(__unused task_t task) {
+
+#if CONFIG_BANK
+ if (task->bank_context != NULL) {
+ bank_task_destroy(task);
+ }
+#endif
+
+}
+
+/*
+ * NOTE: This should only be called when the P_LINTRANSIT
+ * flag is set (the proc_trans lock is held) on the
+ * proc associated with the task.
+ */
+void
+task_bank_init(__unused task_t task) {
+
+#if CONFIG_BANK
+ if (task->bank_context != NULL) {
+ panic("Task bank init called with non null bank context for task: %p and bank_context: %p", task, task->bank_context);
+ }
+ bank_task_initialize(task);
+#endif
+
+}
+
+void
+task_set_did_exec_flag(task_t task)
+{
+ task->t_procflags |= TPF_DID_EXEC;
+}
+
+void
+task_clear_exec_copy_flag(task_t task)
+{
+ task->t_procflags &= ~TPF_EXEC_COPY;
+}
+
+/*
+ * This wait event is t_procflags instead of t_flags because t_flags is volatile
+ *
+ * TODO: store the flags in the same place as the event
+ * rdar://problem/28501994
+ */
+event_t
+task_get_return_wait_event(task_t task)
+{
+ return (event_t)&task->t_procflags;
+}
+
+void
+task_clear_return_wait(task_t task)
+{
+ task_lock(task);
+
+ task->t_flags &= ~TF_LRETURNWAIT;
+
+ if (task->t_flags & TF_LRETURNWAITER) {
+ thread_wakeup(task_get_return_wait_event(task));
+ task->t_flags &= ~TF_LRETURNWAITER;
+ }
+
+ task_unlock(task);
+}
+
+void
+task_wait_to_return(void)
+{
+ task_t task;
+
+ task = current_task();
+ task_lock(task);
+
+ if (task->t_flags & TF_LRETURNWAIT) {
+ do {
+ task->t_flags |= TF_LRETURNWAITER;
+ assert_wait(task_get_return_wait_event(task), THREAD_UNINT);
+ task_unlock(task);
+
+ thread_block(THREAD_CONTINUE_NULL);
+
+ task_lock(task);
+ } while (task->t_flags & TF_LRETURNWAIT);
+ }
+
+ task_unlock(task);
+
+ thread_bootstrap_return();
+}
+
+boolean_t
+task_is_exec_copy(task_t task)
+{
+ return task_is_exec_copy_internal(task);
+}
+
+boolean_t
+task_did_exec(task_t task)
+{
+ return task_did_exec_internal(task);
+}
+
+boolean_t
+task_is_active(task_t task)
+{
+ return task->active;
+}
+
#if TASK_REFERENCE_LEAK_DEBUG
#include <kern/btlog.h>
-decl_simple_lock_data(static,task_ref_lock);
static btlog_t *task_ref_btlog;
#define TASK_REF_OP_INCR 0x1
#define TASK_REF_OP_DECR 0x2
+#define TASK_REF_NUM_RECORDS 100000
#define TASK_REF_BTDEPTH 7
-static void
-task_ref_lock_lock(void *context)
-{
- simple_lock((simple_lock_t)context);
-}
-static void
-task_ref_lock_unlock(void *context)
-{
- simple_unlock((simple_lock_t)context);
-}
-
void
task_reference_internal(task_t task)
{
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);
+ lck_mtx_init(&tasks_corpse_lock, &task_lck_grp, &task_lck_attr);
task_zone = zinit(
sizeof(struct task),
zone_change(task_zone, Z_NOENCRYPT, TRUE);
+
/*
- * Configure per-task memory limit. The boot arg takes precedence over the
- * device tree.
+ * Configure per-task memory limit.
+ * The boot-arg is interpreted as Megabytes,
+ * and takes precedence over the device tree.
+ * Setting the boot-arg to 0 disables task limits.
*/
- if (!PE_parse_boot_argn("max_task_pmem", &max_task_footprint,
- sizeof (max_task_footprint))) {
- max_task_footprint = 0;
- }
-
- if (max_task_footprint == 0) {
+ if (!PE_parse_boot_argn("max_task_pmem", &max_task_footprint_mb,
+ sizeof (max_task_footprint_mb))) {
/*
* No limit was found in boot-args, so go look in the device tree.
*/
- if (!PE_get_default("kern.max_task_pmem", &max_task_footprint,
- sizeof(max_task_footprint))) {
- max_task_footprint = 0;
+ if (!PE_get_default("kern.max_task_pmem", &max_task_footprint_mb,
+ sizeof(max_task_footprint_mb))) {
+ /*
+ * No limit was found in device tree.
+ */
+ max_task_footprint_mb = 0;
}
}
- if (max_task_footprint != 0) {
-#if CONFIG_JETSAM
- if (max_task_footprint < 50) {
+ if (max_task_footprint_mb != 0) {
+#if CONFIG_MEMORYSTATUS
+ if (max_task_footprint_mb < 50) {
printf("Warning: max_task_pmem %d below minimum.\n",
- max_task_footprint);
- max_task_footprint = 50;
+ max_task_footprint_mb);
+ max_task_footprint_mb = 50;
}
printf("Limiting task physical memory footprint to %d MB\n",
- max_task_footprint);
- max_task_footprint *= 1024 * 1024; // Convert MB to bytes
+ max_task_footprint_mb);
+
+ max_task_footprint = (ledger_amount_t)max_task_footprint_mb * 1024 * 1024; // Convert MB to bytes
+
+ /*
+ * Configure the per-task memory limit warning level.
+ * This is computed as a percentage.
+ */
+ max_task_footprint_warning_level = 0;
+
+ if (max_mem < 0x40000000) {
+ /*
+ * On devices with < 1GB of memory:
+ * -- set warnings to 50MB below the per-task limit.
+ */
+ if (max_task_footprint_mb > 50) {
+ max_task_footprint_warning_level = ((max_task_footprint_mb - 50) * 100) / max_task_footprint_mb;
+ }
+ } else {
+ /*
+ * On devices with >= 1GB of memory:
+ * -- set warnings to 100MB below the per-task limit.
+ */
+ if (max_task_footprint_mb > 100) {
+ max_task_footprint_warning_level = ((max_task_footprint_mb - 100) * 100) / max_task_footprint_mb;
+ }
+ }
+
+ /*
+ * Never allow warning level to land below the default.
+ */
+ if (max_task_footprint_warning_level < PHYS_FOOTPRINT_WARNING_LEVEL) {
+ max_task_footprint_warning_level = PHYS_FOOTPRINT_WARNING_LEVEL;
+ }
+
+ printf("Limiting task physical memory warning to %d%%\n", max_task_footprint_warning_level);
+
#else
- printf("Warning: max_task_footprint specified, but jetsam not configured; ignoring.\n");
-#endif
+ printf("Warning: max_task_pmem specified, but jetsam not configured; ignoring.\n");
+#endif /* CONFIG_MEMORYSTATUS */
}
+#if MACH_ASSERT
+ PE_parse_boot_argn("pmap_ledgers_panic", &pmap_ledgers_panic,
+ sizeof (pmap_ledgers_panic));
+#endif /* MACH_ASSERT */
+
+#if CONFIG_COREDUMP
if (!PE_parse_boot_argn("hwm_user_cores", &hwm_user_cores,
sizeof (hwm_user_cores))) {
hwm_user_cores = 0;
}
+#endif
proc_init_cpumon_params();
disable_exc_resource = 0;
}
+ if (!PE_parse_boot_argn("task_iomon_limit_mb", &task_iomon_limit_mb, sizeof (task_iomon_limit_mb))) {
+ task_iomon_limit_mb = IOMON_DEFAULT_LIMIT;
+ }
+
+ if (!PE_parse_boot_argn("task_iomon_interval_secs", &task_iomon_interval_secs, sizeof (task_iomon_interval_secs))) {
+ task_iomon_interval_secs = IOMON_DEFAULT_INTERVAL;
+ }
+
+ if (!PE_parse_boot_argn("io_telemetry_limit", &io_telemetry_limit, sizeof (io_telemetry_limit))) {
+ io_telemetry_limit = IO_TELEMETRY_DEFAULT_LIMIT;
+ }
+
+/*
+ * If we have coalitions, coalition_init() will call init_task_ledgers() as it
+ * sets up the ledgers for the default coalition. If we don't have coalitions,
+ * then we have to call it now.
+ */
+#if CONFIG_COALITIONS
+ assert(task_ledger_template);
+#else /* CONFIG_COALITIONS */
init_task_ledgers();
+#endif /* CONFIG_COALITIONS */
#if TASK_REFERENCE_LEAK_DEBUG
- simple_lock_init(&task_ref_lock, 0);
- task_ref_btlog = btlog_create(100000,
- TASK_REF_BTDEPTH,
- task_ref_lock_lock,
- task_ref_lock_unlock,
- &task_ref_lock);
+ task_ref_btlog = btlog_create(TASK_REF_NUM_RECORDS, TASK_REF_BTDEPTH, TRUE /* caller_will_remove_entries_for_element? */);
assert(task_ref_btlog);
#endif
* Create the kernel task as the first task.
*/
#ifdef __LP64__
- if (task_create_internal(TASK_NULL, FALSE, TRUE, &kernel_task) != KERN_SUCCESS)
+ if (task_create_internal(TASK_NULL, NULL, FALSE, TRUE, TF_NONE, TPF_NONE, &kernel_task) != KERN_SUCCESS)
#else
- if (task_create_internal(TASK_NULL, FALSE, FALSE, &kernel_task) != KERN_SUCCESS)
+ if (task_create_internal(TASK_NULL, NULL, FALSE, FALSE, TF_NONE, TPF_NONE, &kernel_task) != KERN_SUCCESS)
#endif
panic("task_init\n");
*
* phys_footprint
* Physical footprint: This is the sum of:
- * + phys_mem [task's resident memory]
- * + phys_compressed
- * + iokit_mem
+ * + (internal - alternate_accounting)
+ * + (internal_compressed - alternate_accounting_compressed)
+ * + iokit_mapped
+ * + purgeable_nonvolatile
+ * + purgeable_nonvolatile_compressed
+ * + page_table
*
- * iokit_mem
- * IOKit mappings: The total size of all IOKit mappings in this task [regardless of clean/dirty state].
- *
- * phys_compressed
- * Physical compressed: Amount of this task's resident memory which is held by the compressor.
+ * internal
+ * The task's anonymous memory, which on iOS is always resident.
+ *
+ * internal_compressed
+ * Amount of this task's internal memory which is held by the compressor.
* Such memory is no longer actually resident for the task [i.e., resident in its pmap],
* and could be either decompressed back into memory, or paged out to storage, depending
* on our implementation.
+ *
+ * iokit_mapped
+ * IOKit mappings: The total size of all IOKit mappings in this task, regardless of
+ clean/dirty or internal/external state].
+ *
+ * alternate_accounting
+ * The number of internal dirty pages which are part of IOKit mappings. By definition, these pages
+ * are counted in both internal *and* iokit_mapped, so we must subtract them from the total to avoid
+ * double counting.
*/
void
init_task_ledgers(void)
assert(task_ledger_template == NULL);
assert(kernel_task == TASK_NULL);
+#if MACH_ASSERT
+ PE_parse_boot_argn("pmap_ledgers_panic", &pmap_ledgers_panic,
+ sizeof (pmap_ledgers_panic));
+#endif /* MACH_ASSERT */
+
if ((t = ledger_template_create("Per-task ledger")) == NULL)
panic("couldn't create task ledger template");
"bytes");
task_ledgers.wired_mem = ledger_entry_add(t, "wired_mem", "physmem",
"bytes");
- task_ledgers.iokit_mem = ledger_entry_add(t, "iokit_mem", "mappings",
+ task_ledgers.internal = ledger_entry_add(t, "internal", "physmem",
+ "bytes");
+ task_ledgers.iokit_mapped = ledger_entry_add(t, "iokit_mapped", "mappings",
+ "bytes");
+ task_ledgers.alternate_accounting = ledger_entry_add(t, "alternate_accounting", "physmem",
+ "bytes");
+ task_ledgers.alternate_accounting_compressed = ledger_entry_add(t, "alternate_accounting_compressed", "physmem",
"bytes");
+ task_ledgers.page_table = ledger_entry_add(t, "page_table", "physmem",
+ "bytes");
task_ledgers.phys_footprint = ledger_entry_add(t, "phys_footprint", "physmem",
"bytes");
- task_ledgers.phys_compressed = ledger_entry_add(t, "phys_compressed", "physmem",
+ task_ledgers.internal_compressed = ledger_entry_add(t, "internal_compressed", "physmem",
"bytes");
+ task_ledgers.purgeable_volatile = ledger_entry_add(t, "purgeable_volatile", "physmem", "bytes");
+ task_ledgers.purgeable_nonvolatile = ledger_entry_add(t, "purgeable_nonvolatile", "physmem", "bytes");
+ task_ledgers.purgeable_volatile_compressed = ledger_entry_add(t, "purgeable_volatile_compress", "physmem", "bytes");
+ task_ledgers.purgeable_nonvolatile_compressed = ledger_entry_add(t, "purgeable_nonvolatile_compress", "physmem", "bytes");
task_ledgers.platform_idle_wakeups = ledger_entry_add(t, "platform_idle_wakeups", "power",
"count");
task_ledgers.interrupt_wakeups = ledger_entry_add(t, "interrupt_wakeups", "power",
"count");
+
+#if CONFIG_SCHED_SFI
+ sfi_class_id_t class_id, ledger_alias;
+ for (class_id = SFI_CLASS_UNSPECIFIED; class_id < MAX_SFI_CLASS_ID; class_id++) {
+ task_ledgers.sfi_wait_times[class_id] = -1;
+ }
+
+ /* don't account for UNSPECIFIED */
+ for (class_id = SFI_CLASS_UNSPECIFIED + 1; class_id < MAX_SFI_CLASS_ID; class_id++) {
+ ledger_alias = sfi_get_ledger_alias_for_class(class_id);
+ if (ledger_alias != SFI_CLASS_UNSPECIFIED) {
+ /* Check to see if alias has been registered yet */
+ if (task_ledgers.sfi_wait_times[ledger_alias] != -1) {
+ task_ledgers.sfi_wait_times[class_id] = task_ledgers.sfi_wait_times[ledger_alias];
+ } else {
+ /* Otherwise, initialize it first */
+ task_ledgers.sfi_wait_times[class_id] = task_ledgers.sfi_wait_times[ledger_alias] = sfi_ledger_entry_add(t, ledger_alias);
+ }
+ } else {
+ task_ledgers.sfi_wait_times[class_id] = sfi_ledger_entry_add(t, class_id);
+ }
- 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) || (task_ledgers.iokit_mem < 0) ||
- (task_ledgers.phys_footprint < 0) || (task_ledgers.phys_compressed < 0) ||
- (task_ledgers.platform_idle_wakeups < 0) || (task_ledgers.interrupt_wakeups < 0)) {
+ if (task_ledgers.sfi_wait_times[class_id] < 0) {
+ panic("couldn't create entries for task ledger template for SFI class 0x%x", class_id);
+ }
+ }
+
+ assert(task_ledgers.sfi_wait_times[MAX_SFI_CLASS_ID -1] != -1);
+#endif /* CONFIG_SCHED_SFI */
+
+#ifdef CONFIG_BANK
+ task_ledgers.cpu_time_billed_to_me = ledger_entry_add(t, "cpu_time_billed_to_me", "sched", "ns");
+ task_ledgers.cpu_time_billed_to_others = ledger_entry_add(t, "cpu_time_billed_to_others", "sched", "ns");
+#endif
+ task_ledgers.physical_writes = ledger_entry_add(t, "physical_writes", "res", "bytes");
+ task_ledgers.logical_writes = ledger_entry_add(t, "logical_writes", "res", "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) ||
+ (task_ledgers.internal < 0) ||
+ (task_ledgers.iokit_mapped < 0) ||
+ (task_ledgers.alternate_accounting < 0) ||
+ (task_ledgers.alternate_accounting_compressed < 0) ||
+ (task_ledgers.page_table < 0) ||
+ (task_ledgers.phys_footprint < 0) ||
+ (task_ledgers.internal_compressed < 0) ||
+ (task_ledgers.purgeable_volatile < 0) ||
+ (task_ledgers.purgeable_nonvolatile < 0) ||
+ (task_ledgers.purgeable_volatile_compressed < 0) ||
+ (task_ledgers.purgeable_nonvolatile_compressed < 0) ||
+ (task_ledgers.platform_idle_wakeups < 0) ||
+ (task_ledgers.interrupt_wakeups < 0) ||
+#ifdef CONFIG_BANK
+ (task_ledgers.cpu_time_billed_to_me < 0) || (task_ledgers.cpu_time_billed_to_others < 0) ||
+#endif
+ (task_ledgers.physical_writes < 0) ||
+ (task_ledgers.logical_writes < 0)
+ ) {
panic("couldn't create entries for task ledger template");
}
+ ledger_track_credit_only(t, task_ledgers.phys_footprint);
+ ledger_track_credit_only(t, task_ledgers.internal);
+ ledger_track_credit_only(t, task_ledgers.internal_compressed);
+ ledger_track_credit_only(t, task_ledgers.iokit_mapped);
+ ledger_track_credit_only(t, task_ledgers.alternate_accounting);
+ ledger_track_credit_only(t, task_ledgers.alternate_accounting_compressed);
+ ledger_track_credit_only(t, task_ledgers.purgeable_volatile);
+ ledger_track_credit_only(t, task_ledgers.purgeable_nonvolatile);
+ ledger_track_credit_only(t, task_ledgers.purgeable_volatile_compressed);
+ ledger_track_credit_only(t, task_ledgers.purgeable_nonvolatile_compressed);
+
ledger_track_maximum(t, task_ledgers.phys_footprint, 60);
+#if MACH_ASSERT
+ if (pmap_ledgers_panic) {
+ ledger_panic_on_negative(t, task_ledgers.phys_footprint);
+ ledger_panic_on_negative(t, task_ledgers.page_table);
+ ledger_panic_on_negative(t, task_ledgers.internal);
+ ledger_panic_on_negative(t, task_ledgers.internal_compressed);
+ ledger_panic_on_negative(t, task_ledgers.iokit_mapped);
+ ledger_panic_on_negative(t, task_ledgers.alternate_accounting);
+ ledger_panic_on_negative(t, task_ledgers.alternate_accounting_compressed);
+ ledger_panic_on_negative(t, task_ledgers.purgeable_volatile);
+ ledger_panic_on_negative(t, task_ledgers.purgeable_nonvolatile);
+ ledger_panic_on_negative(t, task_ledgers.purgeable_volatile_compressed);
+ ledger_panic_on_negative(t, task_ledgers.purgeable_nonvolatile_compressed);
+ }
+#endif /* MACH_ASSERT */
-#if CONFIG_JETSAM
+#if CONFIG_MEMORYSTATUS
ledger_set_callback(t, task_ledgers.phys_footprint, task_footprint_exceeded, NULL, NULL);
-#endif
+#endif /* CONFIG_MEMORYSTATUS */
ledger_set_callback(t, task_ledgers.interrupt_wakeups,
task_wakeups_rate_exceeded, NULL, NULL);
-
+ ledger_set_callback(t, task_ledgers.physical_writes, task_io_rate_exceeded, (void *)FLAVOR_IO_PHYSICAL_WRITES, NULL);
+ ledger_set_callback(t, task_ledgers.logical_writes, task_io_rate_exceeded, (void *)FLAVOR_IO_LOGICAL_WRITES, NULL);
task_ledger_template = t;
}
kern_return_t
task_create_internal(
task_t parent_task,
+ coalition_t *parent_coalitions __unused,
boolean_t inherit_memory,
boolean_t is_64bit,
+ uint32_t t_flags,
+ uint32_t t_procflags,
task_t *child_task) /* OUT */
{
task_t new_task;
new_task->ledger = ledger;
+#if defined(CONFIG_SCHED_MULTIQ)
+ new_task->sched_group = sched_group_create();
+#endif
+
/* if inherit_memory is true, parent_task MUST not be NULL */
- if (inherit_memory)
- new_task->map = vm_map_fork(ledger, parent_task->map);
+ if (!(t_flags & TF_CORPSE_FORK) && inherit_memory)
+ new_task->map = vm_map_fork(ledger, parent_task->map, 0);
else
new_task->map = vm_map_create(pmap_create(ledger, 0, is_64bit),
(vm_map_offset_t)(VM_MIN_ADDRESS),
new_task->active = TRUE;
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->c_switch = new_task->p_switch = new_task->ps_switch = 0;
- new_task->t_flags = 0;
+ new_task->t_flags = t_flags;
+ new_task->t_procflags = t_procflags;
new_task->importance = 0;
+ new_task->corpse_info_kernel = NULL;
+ new_task->exec_token = 0;
- zinfo_task_init(new_task);
+#if CONFIG_ATM
+ new_task->atm_context = NULL;
+#endif
+#if CONFIG_BANK
+ new_task->bank_context = NULL;
+#endif
#ifdef MACH_BSD
new_task->bsd_info = NULL;
+ new_task->corpse_info = NULL;
#endif /* MACH_BSD */
-#if CONFIG_JETSAM
+#if CONFIG_MACF
+ new_task->crash_label = NULL;
+#endif
+
+#if CONFIG_MEMORYSTATUS
if (max_task_footprint != 0) {
ledger_set_limit(ledger, task_ledgers.phys_footprint, max_task_footprint, PHYS_FOOTPRINT_WARNING_LEVEL);
}
-#endif
+#endif /* CONFIG_MEMORYSTATUS */
if (task_wakeups_monitor_rate != 0) {
uint32_t flags = WAKEMON_ENABLE | WAKEMON_SET_DEFAULTS;
task_wakeups_monitor_ctl(new_task, &flags, &rate);
}
+#if CONFIG_IO_ACCOUNTING
+ uint32_t flags = IOMON_ENABLE;
+ task_io_monitor_ctl(new_task, &flags);
+#endif /* CONFIG_IO_ACCOUNTING */
+
#if defined(__i386__) || defined(__x86_64__)
new_task->i386_ldt = 0;
#endif
new_task->task_debug = NULL;
+#if DEVELOPMENT || DEBUG
+ new_task->task_unnested = FALSE;
+ new_task->task_disconnected_count = 0;
+#endif
queue_init(&new_task->semaphore_list);
new_task->semaphores_owned = 0;
-#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;
-
new_task->vtimers = 0;
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->changing_freeze_state = FALSE;
new_task->suspends_outstanding = 0;
#endif
+#if HYPERVISOR
+ new_task->hv_task_target = NULL;
+#endif /* HYPERVISOR */
+
- new_task->low_mem_notified_warn = 0;
- new_task->low_mem_notified_critical = 0;
- new_task->purged_memory_warn = 0;
- new_task->purged_memory_critical = 0;
new_task->mem_notify_reserved = 0;
#if IMPORTANCE_INHERITANCE
- new_task->imp_receiver = 0;
- new_task->imp_donor = 0;
- new_task->imp_reserved = 0;
- new_task->task_imp_assertcnt = 0;
- new_task->task_imp_externcnt = 0;
+ new_task->task_imp_base = NULL;
#endif /* IMPORTANCE_INHERITANCE */
#if defined(__x86_64__)
new_task->requested_policy = default_task_requested_policy;
new_task->effective_policy = default_task_effective_policy;
- new_task->pended_policy = default_task_pended_policy;
if (parent_task != TASK_NULL) {
new_task->sec_token = parent_task->sec_token;
new_task->pset_hint = parent_task->pset_hint = task_choose_pset(parent_task);
#if IMPORTANCE_INHERITANCE
- new_task->imp_donor = parent_task->imp_donor;
- /* Embedded doesn't want this to inherit */
- new_task->imp_receiver = parent_task->imp_receiver;
-#endif /* IMPORTANCE_INHERITANCE */
+ ipc_importance_task_t new_task_imp = IIT_NULL;
+ boolean_t inherit_receive = TRUE;
+
+ if (task_is_marked_importance_donor(parent_task)) {
+ new_task_imp = ipc_importance_for_task(new_task, FALSE);
+ assert(IIT_NULL != new_task_imp);
+ ipc_importance_task_mark_donor(new_task_imp, TRUE);
+ }
- new_task->requested_policy.t_apptype = parent_task->requested_policy.t_apptype;
+ if (inherit_receive) {
+ if (task_is_marked_importance_receiver(parent_task)) {
+ if (IIT_NULL == new_task_imp)
+ new_task_imp = ipc_importance_for_task(new_task, FALSE);
+ assert(IIT_NULL != new_task_imp);
+ ipc_importance_task_mark_receiver(new_task_imp, TRUE);
+ }
+ if (task_is_marked_importance_denap_receiver(parent_task)) {
+ if (IIT_NULL == new_task_imp)
+ new_task_imp = ipc_importance_for_task(new_task, FALSE);
+ assert(IIT_NULL != new_task_imp);
+ ipc_importance_task_mark_denap_receiver(new_task_imp, TRUE);
+ }
+ }
+
+ if (IIT_NULL != new_task_imp) {
+ assert(new_task->task_imp_base == new_task_imp);
+ ipc_importance_task_release(new_task_imp);
+ }
+#endif /* IMPORTANCE_INHERITANCE */
- new_task->requested_policy.int_darwinbg = parent_task->requested_policy.int_darwinbg;
- new_task->requested_policy.ext_darwinbg = parent_task->requested_policy.ext_darwinbg;
- new_task->requested_policy.int_iotier = parent_task->requested_policy.int_iotier;
- new_task->requested_policy.ext_iotier = parent_task->requested_policy.ext_iotier;
- new_task->requested_policy.int_iopassive = parent_task->requested_policy.int_iopassive;
- new_task->requested_policy.ext_iopassive = parent_task->requested_policy.ext_iopassive;
- new_task->requested_policy.bg_iotier = parent_task->requested_policy.bg_iotier;
- new_task->requested_policy.terminated = parent_task->requested_policy.terminated;
+ new_task->priority = BASEPRI_DEFAULT;
+ new_task->max_priority = MAXPRI_USER;
- task_policy_create(new_task, parent_task->requested_policy.t_boosted);
+ task_policy_create(new_task, parent_task);
} else {
new_task->sec_token = KERNEL_SECURITY_TOKEN;
new_task->audit_token = KERNEL_AUDIT_TOKEN;
new_task->all_image_info_size = (mach_vm_size_t)0;
new_task->pset_hint = PROCESSOR_SET_NULL;
+
+ if (kernel_task == TASK_NULL) {
+ new_task->priority = BASEPRI_KERNEL;
+ new_task->max_priority = MAXPRI_KERNEL;
+ } else {
+ new_task->priority = BASEPRI_DEFAULT;
+ new_task->max_priority = MAXPRI_USER;
+ }
}
- if (kernel_task == TASK_NULL) {
- new_task->priority = BASEPRI_KERNEL;
- new_task->max_priority = MAXPRI_KERNEL;
- } else if (proc_get_effective_task_policy(new_task, TASK_POLICY_LOWPRI_CPU)) {
- new_task->priority = MAXPRI_THROTTLE;
- new_task->max_priority = MAXPRI_THROTTLE;
+ bzero(new_task->coalition, sizeof(new_task->coalition));
+ for (int i = 0; i < COALITION_NUM_TYPES; i++)
+ queue_chain_init(new_task->task_coalition[i]);
+
+ /* Allocate I/O Statistics */
+ new_task->task_io_stats = (io_stat_info_t)kalloc(sizeof(struct io_stat_info));
+ assert(new_task->task_io_stats != NULL);
+ bzero(new_task->task_io_stats, sizeof(struct io_stat_info));
+
+ bzero(&(new_task->cpu_time_qos_stats), sizeof(struct _cpu_time_qos_stats));
+
+ bzero(&new_task->extmod_statistics, sizeof(new_task->extmod_statistics));
+
+ /* Copy resource acc. info from Parent for Corpe Forked task. */
+ if (parent_task != NULL && (t_flags & TF_CORPSE_FORK)) {
+ task_rollup_accounting_info(new_task, parent_task);
} else {
- new_task->priority = BASEPRI_DEFAULT;
- new_task->max_priority = MAXPRI_USER;
+ /* Initialize to zero for standard fork/spawn case */
+ new_task->total_user_time = 0;
+ new_task->total_system_time = 0;
+ new_task->faults = 0;
+ new_task->pageins = 0;
+ new_task->cow_faults = 0;
+ new_task->messages_sent = 0;
+ new_task->messages_received = 0;
+ new_task->syscalls_mach = 0;
+ new_task->syscalls_unix = 0;
+ new_task->c_switch = 0;
+ new_task->p_switch = 0;
+ new_task->ps_switch = 0;
+ new_task->low_mem_notified_warn = 0;
+ new_task->low_mem_notified_critical = 0;
+ new_task->purged_memory_warn = 0;
+ new_task->purged_memory_critical = 0;
+ new_task->low_mem_privileged_listener = 0;
+ new_task->task_timer_wakeups_bin_1 = 0;
+ new_task->task_timer_wakeups_bin_2 = 0;
+ new_task->task_gpu_ns = 0;
+ new_task->task_immediate_writes = 0;
+ new_task->task_deferred_writes = 0;
+ new_task->task_invalidated_writes = 0;
+ new_task->task_metadata_writes = 0;
+ new_task->task_energy = 0;
}
- bzero(&new_task->extmod_statistics, sizeof(new_task->extmod_statistics));
- new_task->task_timer_wakeups_bin_1 = new_task->task_timer_wakeups_bin_2 = 0;
- lck_mtx_lock(&tasks_threads_lock);
- queue_enter(&tasks, new_task, task_t, tasks);
- tasks_count++;
- lck_mtx_unlock(&tasks_threads_lock);
+
+#if CONFIG_COALITIONS
+ if (!(t_flags & TF_CORPSE_FORK)) {
+ /* TODO: there is no graceful failure path here... */
+ if (parent_coalitions && parent_coalitions[COALITION_TYPE_RESOURCE]) {
+ coalitions_adopt_task(parent_coalitions, new_task);
+ } else if (parent_task && parent_task->coalition[COALITION_TYPE_RESOURCE]) {
+ /*
+ * all tasks at least have a resource coalition, so
+ * if the parent has one then inherit all coalitions
+ * the parent is a part of
+ */
+ coalitions_adopt_task(parent_task->coalition, new_task);
+ } else {
+ /* TODO: assert that new_task will be PID 1 (launchd) */
+ coalitions_adopt_init_task(new_task);
+ }
+ } else {
+ coalitions_adopt_corpse_task(new_task);
+ }
+
+ if (new_task->coalition[COALITION_TYPE_RESOURCE] == COALITION_NULL) {
+ panic("created task is not a member of a resource coalition");
+ }
+#endif /* CONFIG_COALITIONS */
+
+ new_task->dispatchqueue_offset = 0;
+ if (parent_task != NULL) {
+ new_task->dispatchqueue_offset = parent_task->dispatchqueue_offset;
+ }
if (vm_backing_store_low && parent_task != NULL)
new_task->priv_flags |= (parent_task->priv_flags&VM_BACKING_STORE_PRIV);
new_task->task_volatile_objects = 0;
+ new_task->task_nonvolatile_objects = 0;
+ new_task->task_purgeable_disowning = FALSE;
+ new_task->task_purgeable_disowned = FALSE;
+
+#if CONFIG_SECLUDED_MEMORY
+ new_task->task_can_use_secluded_mem = FALSE;
+ new_task->task_could_use_secluded_mem = FALSE;
+ new_task->task_could_also_use_secluded_mem = FALSE;
+#endif /* CONFIG_SECLUDED_MEMORY */
+
+ queue_init(&new_task->io_user_clients);
ipc_task_enable(new_task);
+ lck_mtx_lock(&tasks_threads_lock);
+ queue_enter(&tasks, new_task, task_t, tasks);
+ tasks_count++;
+ if (tasks_suspend_state) {
+ task_suspend_internal(new_task);
+ }
+ lck_mtx_unlock(&tasks_threads_lock);
+
*child_task = new_task;
return(KERN_SUCCESS);
}
/*
- * task_deallocate:
+ * task_rollup_accounting_info
*
- * Drop a reference on a task.
+ * Roll up accounting stats. Used to rollup stats
+ * for exec copy task and corpse fork.
*/
void
-task_deallocate(
- task_t task)
+task_rollup_accounting_info(task_t to_task, task_t from_task)
{
- ledger_amount_t credit, debit, interrupt_wakeups, platform_idle_wakeups;
+ assert(from_task != to_task);
+
+ to_task->total_user_time = from_task->total_user_time;
+ to_task->total_system_time = from_task->total_system_time;
+ to_task->faults = from_task->faults;
+ to_task->pageins = from_task->pageins;
+ to_task->cow_faults = from_task->cow_faults;
+ to_task->messages_sent = from_task->messages_sent;
+ to_task->messages_received = from_task->messages_received;
+ to_task->syscalls_mach = from_task->syscalls_mach;
+ to_task->syscalls_unix = from_task->syscalls_unix;
+ to_task->c_switch = from_task->c_switch;
+ to_task->p_switch = from_task->p_switch;
+ to_task->ps_switch = from_task->ps_switch;
+ to_task->extmod_statistics = from_task->extmod_statistics;
+ to_task->low_mem_notified_warn = from_task->low_mem_notified_warn;
+ to_task->low_mem_notified_critical = from_task->low_mem_notified_critical;
+ to_task->purged_memory_warn = from_task->purged_memory_warn;
+ to_task->purged_memory_critical = from_task->purged_memory_critical;
+ to_task->low_mem_privileged_listener = from_task->low_mem_privileged_listener;
+ *to_task->task_io_stats = *from_task->task_io_stats;
+ to_task->cpu_time_qos_stats = from_task->cpu_time_qos_stats;
+ to_task->task_timer_wakeups_bin_1 = from_task->task_timer_wakeups_bin_1;
+ to_task->task_timer_wakeups_bin_2 = from_task->task_timer_wakeups_bin_2;
+ to_task->task_gpu_ns = from_task->task_gpu_ns;
+ to_task->task_immediate_writes = from_task->task_immediate_writes;
+ to_task->task_deferred_writes = from_task->task_deferred_writes;
+ to_task->task_invalidated_writes = from_task->task_invalidated_writes;
+ to_task->task_metadata_writes = from_task->task_metadata_writes;
+ to_task->task_energy = from_task->task_energy;
+
+ /* Skip ledger roll up for memory accounting entries */
+ ledger_rollup_entry(to_task->ledger, from_task->ledger, task_ledgers.cpu_time);
+ ledger_rollup_entry(to_task->ledger, from_task->ledger, task_ledgers.platform_idle_wakeups);
+ ledger_rollup_entry(to_task->ledger, from_task->ledger, task_ledgers.interrupt_wakeups);
+#if CONFIG_SCHED_SFI
+ for (sfi_class_id_t class_id = SFI_CLASS_UNSPECIFIED; class_id < MAX_SFI_CLASS_ID; class_id++) {
+ ledger_rollup_entry(to_task->ledger, from_task->ledger, task_ledgers.sfi_wait_times[class_id]);
+ }
+#endif
+#if CONFIG_BANK
+ ledger_rollup_entry(to_task->ledger, from_task->ledger, task_ledgers.cpu_time_billed_to_me);
+ ledger_rollup_entry(to_task->ledger, from_task->ledger, task_ledgers.cpu_time_billed_to_others);
+#endif
+ ledger_rollup_entry(to_task->ledger, from_task->ledger, task_ledgers.physical_writes);
+ ledger_rollup_entry(to_task->ledger, from_task->ledger, task_ledgers.logical_writes);
+}
- if (task == TASK_NULL)
+int task_dropped_imp_count = 0;
+
+/*
+ * task_deallocate:
+ *
+ * Drop a reference on a task.
+ */
+void
+task_deallocate(
+ task_t task)
+{
+ ledger_amount_t credit, debit, interrupt_wakeups, platform_idle_wakeups;
+ uint32_t refs;
+
+ if (task == TASK_NULL)
return;
- if (task_deallocate_internal(task) > 0)
+ refs = task_deallocate_internal(task);
+
+#if IMPORTANCE_INHERITANCE
+ if (refs > 1)
+ return;
+
+ if (refs == 1) {
+ /*
+ * If last ref potentially comes from the task's importance,
+ * disconnect it. But more task refs may be added before
+ * that completes, so wait for the reference to go to zero
+ * naturually (it may happen on a recursive task_deallocate()
+ * from the ipc_importance_disconnect_task() call).
+ */
+ if (IIT_NULL != task->task_imp_base)
+ ipc_importance_disconnect_task(task);
+ return;
+ }
+#else
+ if (refs > 0)
return;
+#endif /* IMPORTANCE_INHERITANCE */
lck_mtx_lock(&tasks_threads_lock);
queue_remove(&terminated_tasks, task, task_t, tasks);
terminated_tasks_count--;
lck_mtx_unlock(&tasks_threads_lock);
+ /*
+ * remove the reference on atm descriptor
+ */
+ task_atm_reset(task);
+
+ /*
+ * remove the reference on bank context
+ */
+ task_bank_reset(task);
+
+ if (task->task_io_stats)
+ kfree(task->task_io_stats, sizeof(struct io_stat_info));
+
/*
* Give the machine dependent code a chance
* to perform cleanup before ripping apart
ipc_task_terminate(task);
+ /* let iokit know */
+ iokit_task_terminate(task);
+
if (task->affinity_space)
task_affinity_deallocate(task);
+#if MACH_ASSERT
+ if (task->ledger != NULL &&
+ task->map != NULL &&
+ task->map->pmap != NULL &&
+ task->map->pmap->ledger != NULL) {
+ assert(task->ledger == task->map->pmap->ledger);
+ }
+#endif /* MACH_ASSERT */
+
+ vm_purgeable_disown(task);
+ assert(task->task_purgeable_disowned);
+ if (task->task_volatile_objects != 0 ||
+ task->task_nonvolatile_objects != 0) {
+ panic("task_deallocate(%p): "
+ "volatile_objects=%d nonvolatile_objects=%d\n",
+ task,
+ task->task_volatile_objects,
+ task->task_nonvolatile_objects);
+ }
+
vm_map_deallocate(task->map);
is_release(task->itk_space);
ledger_get_entries(task->ledger, task_ledgers.platform_idle_wakeups,
&platform_idle_wakeups, &debit);
+#if defined(CONFIG_SCHED_MULTIQ)
+ sched_group_destroy(task->sched_group);
+#endif
+
/* Accumulate statistics for dead tasks */
lck_spin_lock(&dead_task_statistics_lock);
dead_task_statistics.total_user_time += task->total_user_time;
lck_spin_unlock(&dead_task_statistics_lock);
lck_mtx_destroy(&task->lock, &task_lck_grp);
-#if CONFIG_MACF_MACH
- labelh_release(task->label);
-#endif
-
if (!ledger_get_entries(task->ledger, task_ledgers.tkm_private, &credit,
&debit)) {
OSAddAtomic64(credit, (int64_t *)&tasks_tkm_private.alloc);
OSAddAtomic64(debit, (int64_t *)&tasks_tkm_shared.free);
}
ledger_dereference(task->ledger);
- zinfo_task_free(task);
#if TASK_REFERENCE_LEAK_DEBUG
btlog_remove_entries_for_element(task_ref_btlog, task);
#endif
- if (task->task_volatile_objects) {
- /*
- * This task still "owns" some volatile VM objects.
- * Disown them now to avoid leaving them pointing back at
- * an invalid task.
- */
- vm_purgeable_disown(task);
- assert(task->task_volatile_objects == 0);
+#if CONFIG_COALITIONS
+ task_release_coalitions(task);
+#endif /* CONFIG_COALITIONS */
+
+ bzero(task->coalition, sizeof(task->coalition));
+
+#if MACH_BSD
+ /* clean up collected information since last reference to task is gone */
+ if (task->corpse_info) {
+ task_crashinfo_destroy(task->corpse_info, RELEASE_CORPSE_REF);
+ task->corpse_info = NULL;
}
+#endif
+ if (task->corpse_info_kernel) {
+ kfree(task->corpse_info_kernel, CORPSEINFO_ALLOCATION_SIZE);
+ }
+
+#if CONFIG_MACF
+ if (task->crash_label) {
+ mac_exc_action_label_task_destroy(task);
+ }
+#endif
zfree(task_zone, task);
}
return(task_deallocate((task_t)token));
}
+
+/*
+ * task_collect_crash_info:
+ *
+ * collect crash info from bsd and mach based data
+ */
+kern_return_t
+task_collect_crash_info(task_t task, struct proc *proc, int is_corpse_fork)
+{
+ kern_return_t kr = KERN_SUCCESS;
+
+ kcdata_descriptor_t crash_data = NULL;
+ kcdata_descriptor_t crash_data_release = NULL;
+ mach_msg_type_number_t size = CORPSEINFO_ALLOCATION_SIZE;
+ mach_vm_offset_t crash_data_ptr = 0;
+ void *crash_data_kernel = NULL;
+ void *crash_data_kernel_release = NULL;
+ int corpse_blob_kernel_alloc = (is_corpse_fork || unify_corpse_blob_alloc);
+
+ if (!corpses_enabled()) {
+ return KERN_NOT_SUPPORTED;
+ }
+
+ task_lock(task);
+
+ assert(is_corpse_fork || task->bsd_info != NULL);
+ if (task->corpse_info == NULL && (is_corpse_fork || task->bsd_info != NULL)) {
+#if CONFIG_MACF
+ /* Update the corpse label, used by the exception delivery mac hook */
+ mac_exc_action_label_task_update(task, proc);
+#endif
+ task_unlock(task);
+
+ if (!corpse_blob_kernel_alloc) {
+ /* map crash data memory in task's vm map */
+ kr = mach_vm_allocate(task->map, &crash_data_ptr, size, (VM_MAKE_TAG(VM_MEMORY_CORPSEINFO) | VM_FLAGS_ANYWHERE));
+ } else {
+ crash_data_kernel = (void *) kalloc(CORPSEINFO_ALLOCATION_SIZE);
+ if (crash_data_kernel == 0)
+ kr = KERN_RESOURCE_SHORTAGE;
+ bzero(crash_data_kernel, CORPSEINFO_ALLOCATION_SIZE);
+ crash_data_ptr = (mach_vm_offset_t) crash_data_kernel;
+ }
+ if (kr != KERN_SUCCESS)
+ goto out_no_lock;
+
+ /* Do not get a corpse ref for corpse fork */
+ crash_data = task_crashinfo_alloc_init((mach_vm_address_t)crash_data_ptr, size, is_corpse_fork ? !GET_CORPSE_REF : GET_CORPSE_REF, corpse_blob_kernel_alloc ? KCFLAG_USE_MEMCOPY: KCFLAG_USE_COPYOUT);
+ if (crash_data) {
+ task_lock(task);
+ crash_data_release = task->corpse_info;
+ crash_data_kernel_release = task->corpse_info_kernel;
+ task->corpse_info = crash_data;
+ task->corpse_info_kernel = crash_data_kernel;
+
+ task_unlock(task);
+ kr = KERN_SUCCESS;
+ } else {
+ /* if failed to create corpse info, free the mapping */
+ if (!corpse_blob_kernel_alloc) {
+ if (KERN_SUCCESS != mach_vm_deallocate(task->map, crash_data_ptr, size)) {
+ printf("mach_vm_deallocate failed to clear corpse_data for pid %d.\n", task_pid(task));
+ }
+ } else {
+ kfree(crash_data_kernel, CORPSEINFO_ALLOCATION_SIZE);
+ }
+ kr = KERN_FAILURE;
+ }
+
+ if (crash_data_release != NULL) {
+ task_crashinfo_destroy(crash_data_release, is_corpse_fork ? !RELEASE_CORPSE_REF : RELEASE_CORPSE_REF);
+ }
+ if (crash_data_kernel_release != NULL) {
+ kfree(crash_data_kernel_release, CORPSEINFO_ALLOCATION_SIZE);
+ }
+ } else {
+ task_unlock(task);
+ }
+
+out_no_lock:
+ return kr;
+}
+
+/*
+ * task_deliver_crash_notification:
+ *
+ * Makes outcall to registered host port for a corpse.
+ */
+kern_return_t
+task_deliver_crash_notification(task_t task, thread_t thread, mach_exception_data_type_t subcode)
+{
+ kcdata_descriptor_t crash_info = task->corpse_info;
+ thread_t th_iter = NULL;
+ kern_return_t kr = KERN_SUCCESS;
+ wait_interrupt_t wsave;
+ mach_exception_data_type_t code[EXCEPTION_CODE_MAX];
+ ipc_port_t task_port, old_notify;
+
+ if (crash_info == NULL)
+ return KERN_FAILURE;
+
+ task_lock(task);
+ if (task_is_a_corpse_fork(task)) {
+ /* Populate code with EXC_RESOURCE for corpse fork */
+ code[0] = EXC_RESOURCE;
+ code[1] = subcode;
+ } else if (unify_corpse_blob_alloc) {
+ /* Populate code with EXC_CRASH for corpses */
+ code[0] = EXC_CRASH;
+ code[1] = 0;
+ /* Update the code[1] if the boot-arg corpse_for_fatal_memkill is set */
+ if (corpse_for_fatal_memkill) {
+ code[1] = subcode;
+ }
+ } else {
+ /* Populate code with address and length for EXC_CRASH */
+ code[0] = crash_info->kcd_addr_begin;
+ code[1] = crash_info->kcd_length;
+ }
+ queue_iterate(&task->threads, th_iter, thread_t, task_threads)
+ {
+ if (th_iter->corpse_dup == FALSE) {
+ ipc_thread_reset(th_iter);
+ }
+ }
+ task_unlock(task);
+
+ /* Arm the no-sender notification for taskport */
+ task_reference(task);
+ task_port = convert_task_to_port(task);
+ ip_lock(task_port);
+ assert(ip_active(task_port));
+ ipc_port_nsrequest(task_port, task_port->ip_mscount, ipc_port_make_sonce_locked(task_port), &old_notify);
+ /* port unlocked */
+ assert(IP_NULL == old_notify);
+
+ wsave = thread_interrupt_level(THREAD_UNINT);
+ kr = exception_triage_thread(EXC_CORPSE_NOTIFY, code, EXCEPTION_CODE_MAX, thread);
+ if (kr != KERN_SUCCESS) {
+ printf("Failed to send exception EXC_CORPSE_NOTIFY. error code: %d for pid %d\n", kr, task_pid(task));
+ }
+
+ (void)thread_interrupt_level(wsave);
+
+ /*
+ * Drop the send right on task port, will fire the
+ * no-sender notification if exception deliver failed.
+ */
+ ipc_port_release_send(task_port);
+ return kr;
+}
+
/*
* task_terminate:
*
return (task_terminate_internal(task));
}
+#if MACH_ASSERT
+extern int proc_pid(struct proc *);
+extern void proc_name_kdp(task_t t, char *buf, int size);
+#endif /* MACH_ASSERT */
+
+#define VM_MAP_PARTIAL_REAP 0x54 /* 0x150 */
+static void
+__unused task_partial_reap(task_t task, __unused int pid)
+{
+ unsigned int reclaimed_resident = 0;
+ unsigned int reclaimed_compressed = 0;
+ uint64_t task_page_count;
+
+ task_page_count = (get_task_phys_footprint(task) / PAGE_SIZE_64);
+
+ KERNEL_DEBUG_CONSTANT((MACHDBG_CODE(DBG_MACH_VM, VM_MAP_PARTIAL_REAP) | DBG_FUNC_START),
+ pid, task_page_count, 0, 0, 0);
+
+ vm_map_partial_reap(task->map, &reclaimed_resident, &reclaimed_compressed);
+
+ KERNEL_DEBUG_CONSTANT((MACHDBG_CODE(DBG_MACH_VM, VM_MAP_PARTIAL_REAP) | DBG_FUNC_END),
+ pid, reclaimed_resident, reclaimed_compressed, 0, 0);
+}
+
+kern_return_t
+task_mark_corpse(task_t task)
+{
+ kern_return_t kr = KERN_SUCCESS;
+ thread_t self_thread;
+ (void) self_thread;
+ wait_interrupt_t wsave;
+
+ assert(task != kernel_task);
+ assert(task == current_task());
+ assert(!task_is_a_corpse(task));
+
+ kr = task_collect_crash_info(task, (struct proc*)task->bsd_info, FALSE);
+ if (kr != KERN_SUCCESS) {
+ return kr;
+ }
+
+ self_thread = current_thread();
+
+ wsave = thread_interrupt_level(THREAD_UNINT);
+ task_lock(task);
+
+ task_set_corpse_pending_report(task);
+ task_set_corpse(task);
+
+ kr = task_start_halt_locked(task, TRUE);
+ assert(kr == KERN_SUCCESS);
+
+ ipc_task_reset(task);
+ /* Remove the naked send right for task port, needed to arm no sender notification */
+ task_set_special_port(task, TASK_KERNEL_PORT, IPC_PORT_NULL);
+ ipc_task_enable(task);
+
+ task_unlock(task);
+ /* terminate the ipc space */
+ ipc_space_terminate(task->itk_space);
+
+ /* Add it to global corpse task list */
+ task_add_to_corpse_task_list(task);
+
+ task_start_halt(task);
+ thread_terminate_internal(self_thread);
+
+ (void) thread_interrupt_level(wsave);
+ assert(task->halting == TRUE);
+ return kr;
+}
+
+/*
+ * task_clear_corpse
+ *
+ * Clears the corpse pending bit on task.
+ * Removes inspection bit on the threads.
+ */
+void
+task_clear_corpse(task_t task)
+{
+ thread_t th_iter = NULL;
+
+ task_lock(task);
+ queue_iterate(&task->threads, th_iter, thread_t, task_threads)
+ {
+ thread_mtx_lock(th_iter);
+ th_iter->inspection = FALSE;
+ thread_mtx_unlock(th_iter);
+ }
+
+ thread_terminate_crashed_threads();
+ /* remove the pending corpse report flag */
+ task_clear_corpse_pending_report(task);
+
+ task_unlock(task);
+}
+
+/*
+ * task_port_notify
+ *
+ * Called whenever the Mach port system detects no-senders on
+ * the task port of a corpse.
+ * Each notification that comes in should terminate the task (corpse).
+ */
+void
+task_port_notify(mach_msg_header_t *msg)
+{
+ mach_no_senders_notification_t *notification = (void *)msg;
+ ipc_port_t port = notification->not_header.msgh_remote_port;
+ task_t task;
+
+ assert(ip_active(port));
+ assert(IKOT_TASK == ip_kotype(port));
+ task = (task_t) port->ip_kobject;
+
+ assert(task_is_a_corpse(task));
+
+ /* Remove the task from global corpse task list */
+ task_remove_from_corpse_task_list(task);
+
+ task_clear_corpse(task);
+ task_terminate_internal(task);
+}
+
+/*
+ * task_wait_till_threads_terminate_locked
+ *
+ * Wait till all the threads in the task are terminated.
+ * Might release the task lock and re-acquire it.
+ */
+void
+task_wait_till_threads_terminate_locked(task_t task)
+{
+ /* wait for all the threads in the task to terminate */
+ while (task->active_thread_count != 0) {
+ assert_wait((event_t)&task->active_thread_count, THREAD_UNINT);
+ task_unlock(task);
+ thread_block(THREAD_CONTINUE_NULL);
+
+ task_lock(task);
+ }
+}
+
+/*
+ * task_duplicate_map_and_threads
+ *
+ * Copy vmmap of source task.
+ * Copy active threads from source task to destination task.
+ * Source task would be suspended during the copy.
+ */
+kern_return_t
+task_duplicate_map_and_threads(
+ task_t task,
+ void *p,
+ task_t new_task,
+ thread_t *thread_ret,
+ int is64bit,
+ uint64_t **udata_buffer,
+ int *size,
+ int *num_udata)
+{
+ kern_return_t kr = KERN_SUCCESS;
+ int active;
+ thread_t thread, self, thread_return = THREAD_NULL;
+ thread_t new_thread = THREAD_NULL;
+ thread_t *thread_array;
+ uint32_t active_thread_count = 0, array_count = 0, i;
+ vm_map_t oldmap;
+ uint64_t *buffer = NULL;
+ int buf_size = 0;
+ int est_knotes = 0, num_knotes = 0;
+
+ self = current_thread();
+
+ /*
+ * Suspend the task to copy thread state, use the internal
+ * variant so that no user-space process can resume
+ * the task from under us
+ */
+ kr = task_suspend_internal(task);
+ if (kr != KERN_SUCCESS) {
+ return kr;
+ }
+
+ if (task->map->disable_vmentry_reuse == TRUE) {
+ /*
+ * Quite likely GuardMalloc (or some debugging tool)
+ * is being used on this task. And it has gone through
+ * its limit. Making a corpse will likely encounter
+ * a lot of VM entries that will need COW.
+ *
+ * Skip it.
+ */
+ task_resume_internal(task);
+ return KERN_FAILURE;
+ }
+
+ /* Setup new task's vmmap, switch from parent task's map to it COW map */
+ oldmap = new_task->map;
+ new_task->map = vm_map_fork(new_task->ledger,
+ task->map,
+ (VM_MAP_FORK_SHARE_IF_INHERIT_NONE |
+ VM_MAP_FORK_PRESERVE_PURGEABLE));
+ vm_map_deallocate(oldmap);
+
+ if (is64bit) {
+ vm_map_set_64bit(get_task_map(new_task));
+ } else {
+ vm_map_set_32bit(get_task_map(new_task));
+ }
+
+ /* Get all the udata pointers from kqueue */
+ est_knotes = proc_list_uptrs(p, NULL, 0);
+ if (est_knotes > 0) {
+ buf_size = (est_knotes + 32) * sizeof(uint64_t);
+ buffer = (uint64_t *) kalloc(buf_size);
+ num_knotes = proc_list_uptrs(p, buffer, buf_size);
+ if (num_knotes > est_knotes + 32) {
+ num_knotes = est_knotes + 32;
+ }
+ }
+
+ active_thread_count = task->active_thread_count;
+ if (active_thread_count == 0) {
+ if (buffer != NULL) {
+ kfree(buffer, buf_size);
+ }
+ task_resume_internal(task);
+ return KERN_FAILURE;
+ }
+
+ thread_array = (thread_t *) kalloc(sizeof(thread_t) * active_thread_count);
+
+ /* Iterate all the threads and drop the task lock before calling thread_create_with_continuation */
+ task_lock(task);
+ queue_iterate(&task->threads, thread, thread_t, task_threads) {
+ /* Skip inactive threads */
+ active = thread->active;
+ if (!active) {
+ continue;
+ }
+
+ if (array_count >= active_thread_count) {
+ break;
+ }
+
+ thread_array[array_count++] = thread;
+ thread_reference(thread);
+ }
+ task_unlock(task);
+
+ for (i = 0; i < array_count; i++) {
+
+ kr = thread_create_with_continuation(new_task, &new_thread, (thread_continue_t)thread_corpse_continue);
+ if (kr != KERN_SUCCESS) {
+ break;
+ }
+
+ /* Equivalent of current thread in corpse */
+ if (thread_array[i] == self) {
+ thread_return = new_thread;
+ } else {
+ /* drop the extra ref returned by thread_create_with_continuation */
+ thread_deallocate(new_thread);
+ }
+
+ kr = thread_dup2(thread_array[i], new_thread);
+ if (kr != KERN_SUCCESS) {
+ thread_mtx_lock(new_thread);
+ new_thread->corpse_dup = TRUE;
+ thread_mtx_unlock(new_thread);
+ continue;
+ }
+
+ /* Copy thread name */
+ bsd_copythreadname(new_thread->uthread, thread_array[i]->uthread);
+ thread_copy_resource_info(new_thread, thread_array[i]);
+ }
+
+ task_resume_internal(task);
+
+ for (i = 0; i < array_count; i++) {
+ thread_deallocate(thread_array[i]);
+ }
+ kfree(thread_array, sizeof(thread_t) * active_thread_count);
+
+ if (kr == KERN_SUCCESS) {
+ *thread_ret = thread_return;
+ *udata_buffer = buffer;
+ *size = buf_size;
+ *num_udata = num_knotes;
+ } else {
+ if (thread_return != THREAD_NULL) {
+ thread_deallocate(thread_return);
+ }
+ if (buffer != NULL) {
+ kfree(buffer, buf_size);
+ }
+ }
+
+ return kr;
+}
+
+#if CONFIG_SECLUDED_MEMORY
+extern void task_set_can_use_secluded_mem_locked(
+ task_t task,
+ boolean_t can_use_secluded_mem);
+#endif /* CONFIG_SECLUDED_MEMORY */
+
kern_return_t
task_terminate_internal(
task_t task)
thread_t thread, self;
task_t self_task;
boolean_t interrupt_save;
+ int pid = 0;
assert(task != kernel_task);
task_lock(task);
}
+#if CONFIG_SECLUDED_MEMORY
+ if (task->task_can_use_secluded_mem) {
+ task_set_can_use_secluded_mem_locked(task, FALSE);
+ }
+ task->task_could_use_secluded_mem = FALSE;
+ task->task_could_also_use_secluded_mem = FALSE;
+#endif /* CONFIG_SECLUDED_MEMORY */
+
if (!task->active) {
/*
* Task is already being terminated.
return (KERN_FAILURE);
}
-#if MACH_ASSERT
- if (task->suspends_outstanding != 0) {
- printf("WARNING: %s (%d) exiting with %d outstanding suspensions\n",
- proc_name_address(task->bsd_info), proc_pid(task->bsd_info),
- task->suspends_outstanding);
+ if (task_corpse_pending_report(task)) {
+ /*
+ * Task is marked for reporting as corpse.
+ * Just return an error. This will
+ * just get us to our AST special handler and that
+ * will get us to finish the path to death
+ */
+ task_unlock(task);
+ if (self_task != task)
+ task_unlock(self_task);
+
+ return (KERN_FAILURE);
}
-#endif
if (self_task != task)
task_unlock(self_task);
thread_terminate_internal(thread);
}
+#ifdef MACH_BSD
+ if (task->bsd_info != NULL && !task_is_exec_copy(task)) {
+ pid = proc_pid(task->bsd_info);
+ }
+#endif /* MACH_BSD */
+
task_unlock(task);
+ proc_set_task_policy(task, TASK_POLICY_ATTRIBUTE,
+ TASK_POLICY_TERMINATED, TASK_POLICY_ENABLE);
+
+ /* Early object reap phase */
+
+// PR-17045188: Revisit implementation
+// task_partial_reap(task, pid);
+
/*
* Destroy all synchronizers owned by the task.
*/
ipc_space_terminate(task->itk_space);
- if (vm_map_has_4GB_pagezero(task->map))
- vm_map_clear_4GB_pagezero(task->map);
+#if 00
+ /* if some ledgers go negative on tear-down again... */
+ ledger_disable_panic_on_negative(task->map->pmap->ledger,
+ task_ledgers.phys_footprint);
+ ledger_disable_panic_on_negative(task->map->pmap->ledger,
+ task_ledgers.internal);
+ ledger_disable_panic_on_negative(task->map->pmap->ledger,
+ task_ledgers.internal_compressed);
+ ledger_disable_panic_on_negative(task->map->pmap->ledger,
+ task_ledgers.iokit_mapped);
+ ledger_disable_panic_on_negative(task->map->pmap->ledger,
+ task_ledgers.alternate_accounting);
+ ledger_disable_panic_on_negative(task->map->pmap->ledger,
+ task_ledgers.alternate_accounting_compressed);
+#endif
/*
* 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.
*/
+
+ vm_map_lock(task->map);
+ vm_map_disable_hole_optimization(task->map);
+ vm_map_unlock(task->map);
+
vm_map_remove(task->map,
task->map->min_offset,
task->map->max_offset,
- VM_MAP_NO_FLAGS);
+ /* no unnesting on final cleanup: */
+ VM_MAP_REMOVE_NO_UNNESTING);
/* release our shared region */
vm_shared_region_set(task, NULL);
+
+#if MACH_ASSERT
+ /*
+ * Identify the pmap's process, in case the pmap ledgers drift
+ * and we have to report it.
+ */
+ char procname[17];
+ if (task->bsd_info && !task_is_exec_copy(task)) {
+ pid = proc_pid(task->bsd_info);
+ proc_name_kdp(task, procname, sizeof (procname));
+ } else {
+ pid = 0;
+ strlcpy(procname, "<unknown>", sizeof (procname));
+ }
+ pmap_set_process(task->map->pmap, pid, procname);
+#endif /* MACH_ASSERT */
+
lck_mtx_lock(&tasks_threads_lock);
queue_remove(&tasks, task, task_t, tasks);
queue_enter(&terminated_tasks, task, task_t, tasks);
*/
thread_interrupt_level(interrupt_save);
+#if KPERF
+ /* force the task to release all ctrs */
+ if (task->t_chud & TASK_KPC_FORCED_ALL_CTRS)
+ kpc_force_all_ctrs(task, 0);
+#endif
+
+#if CONFIG_COALITIONS
+ /*
+ * Leave our coalitions. (drop activation but not reference)
+ */
+ coalitions_remove_task(task);
+#endif
+
/*
* Get rid of the task active reference on itself.
*/
return (KERN_SUCCESS);
}
+void
+tasks_system_suspend(boolean_t suspend)
+{
+ task_t task;
+
+ lck_mtx_lock(&tasks_threads_lock);
+ assert(tasks_suspend_state != suspend);
+ tasks_suspend_state = suspend;
+ queue_iterate(&tasks, task, task_t, tasks) {
+ if (task == kernel_task) {
+ continue;
+ }
+ suspend ? task_suspend_internal(task) : task_resume_internal(task);
+ }
+ lck_mtx_unlock(&tasks_threads_lock);
+}
+
/*
* task_start_halt:
*
* termination.
*/
kern_return_t
-task_start_halt(
- task_t task)
+task_start_halt(task_t task)
{
- thread_t thread, self;
+ kern_return_t kr = KERN_SUCCESS;
+ task_lock(task);
+ kr = task_start_halt_locked(task, FALSE);
+ task_unlock(task);
+ return kr;
+}
+
+static kern_return_t
+task_start_halt_locked(task_t task, boolean_t should_mark_corpse)
+{
+ thread_t thread, self;
+ uint64_t dispatchqueue_offset;
assert(task != kernel_task);
self = current_thread();
- if (task != self->task)
+ if (task != self->task && !task_is_a_corpse_fork(task))
return (KERN_INVALID_ARGUMENT);
- task_lock(task);
-
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
- * so that we run our AST special handler to terminate
- * ourselves.
+ * Task or current thread is already being terminated.
+ * Hurry up and return out of the current kernel context
+ * so that we run our AST special handler to terminate
+ * ourselves.
*/
- task_unlock(task);
-
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
- * would do this on a thread by thread basis anyway, but this
- * gives us a better chance of not having to wait there.
- */
- task_hold_locked(task);
+ /*
+ * Mark all the threads to keep them from starting any more
+ * user-level execution. The thread_terminate_internal code
+ * would do this on a thread by thread basis anyway, but this
+ * gives us a better chance of not having to wait there.
+ */
+ task_hold_locked(task);
+ dispatchqueue_offset = get_dispatchqueue_offset_from_proc(task->bsd_info);
- /*
- * Terminate all the other threads in the task.
- */
- queue_iterate(&task->threads, thread, thread_t, task_threads) {
- if (thread != self)
- thread_terminate_internal(thread);
+ /*
+ * Terminate all the other threads in the task.
+ */
+ queue_iterate(&task->threads, thread, thread_t, task_threads)
+ {
+ if (should_mark_corpse) {
+ thread_mtx_lock(thread);
+ thread->inspection = TRUE;
+ thread_mtx_unlock(thread);
}
-
- task_release_locked(task);
+ if (thread != self)
+ thread_terminate_internal(thread);
}
- task_unlock(task);
+ task->dispatchqueue_offset = dispatchqueue_offset;
+
+ task_release_locked(task);
+
return KERN_SUCCESS;
}
* 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.
+ *
+ * Note: task->halting flag is not cleared in order to avoid creation
+ * of new thread in old exec'ed task.
*/
void
task_complete_halt(task_t task)
* getting a new one.
*/
vm_map_remove(task->map, task->map->min_offset,
- task->map->max_offset, VM_MAP_NO_FLAGS);
+ task->map->max_offset,
+ /* no unnesting on final cleanup: */
+ VM_MAP_REMOVE_NO_UNNESTING);
- task->halting = FALSE;
+ /*
+ * Kick out any IOKitUser handles to the task. At best they're stale,
+ * at worst someone is racing a SUID exec.
+ */
+ iokit_task_terminate(task);
}
/*
*/
void
task_hold_locked(
- register task_t task)
+ task_t task)
{
- register thread_t thread;
+ thread_t thread;
assert(task->active);
*/
kern_return_t
task_hold(
- register task_t task)
+ task_t task)
{
if (task == TASK_NULL)
return (KERN_INVALID_ARGUMENT);
*/
void
task_wait_locked(
- register task_t task,
+ task_t task,
boolean_t until_not_runnable)
{
- register thread_t thread, self;
+ thread_t thread, self;
assert(task->active);
assert(task->suspend_count > 0);
*/
void
task_release_locked(
- register task_t task)
+ task_t task)
{
- register thread_t thread;
+ thread_t thread;
assert(task->active);
assert(task->suspend_count > 0);
static kern_return_t
place_task_hold (
- register task_t task,
+ task_t task,
int mode)
{
- if (!task->active) {
+ if (!task->active && !task_is_a_corpse(task)) {
return (KERN_FAILURE);
}
+ /* Return success for corpse task */
+ if (task_is_a_corpse(task)) {
+ return KERN_SUCCESS;
+ }
+
KERNEL_DEBUG_CONSTANT_IST(KDEBUG_TRACE,
MACHDBG_CODE(DBG_MACH_IPC,MACH_TASK_SUSPEND) | DBG_FUNC_NONE,
- proc_pid(task->bsd_info), ((thread_t)queue_first(&task->threads))->thread_id,
+ task_pid(task), ((thread_t)queue_first(&task->threads))->thread_id,
task->user_stop_count, task->user_stop_count + 1, 0);
#if MACH_ASSERT
static kern_return_t
release_task_hold (
- register task_t task,
+ task_t task,
int mode)
{
- register boolean_t release = FALSE;
+ boolean_t release = FALSE;
- if (!task->active) {
+ if (!task->active && !task_is_a_corpse(task)) {
return (KERN_FAILURE);
}
+
+ /* Return success for corpse task */
+ if (task_is_a_corpse(task)) {
+ return KERN_SUCCESS;
+ }
if (mode == TASK_HOLD_PIDSUSPEND) {
if (task->pidsuspended == FALSE) {
KERNEL_DEBUG_CONSTANT_IST(KDEBUG_TRACE,
MACHDBG_CODE(DBG_MACH_IPC,MACH_TASK_RESUME) | DBG_FUNC_NONE,
- proc_pid(task->bsd_info), ((thread_t)queue_first(&task->threads))->thread_id,
+ task_pid(task), ((thread_t)queue_first(&task->threads))->thread_id,
task->user_stop_count, mode, task->legacy_stop_count);
#if MACH_ASSERT
*/
kern_return_t
task_suspend(
- register task_t task)
+ task_t task)
{
kern_return_t kr;
mach_port_t port, send, old_notify;
*/
if ((kr = ipc_kmsg_copyout_object(current_task()->itk_space, (ipc_object_t)send,
MACH_MSG_TYPE_MOVE_SEND, &name)) != KERN_SUCCESS) {
- printf("warning: %s(%d) failed to copyout suspension token for task %s(%d) with error: %d\n",
- proc_name_address(current_task()->bsd_info), proc_pid(current_task()->bsd_info),
- proc_name_address(task->bsd_info), proc_pid(task->bsd_info), kr);
+ printf("warning: %s(%d) failed to copyout suspension token for pid %d with error: %d\n",
+ proc_name_address(current_task()->bsd_info), proc_pid(current_task()->bsd_info),
+ task_pid(task), kr);
return (kr);
}
*/
kern_return_t
task_resume(
- register task_t task)
+ task_t task)
{
kern_return_t kr;
mach_port_name_t resume_port_name;
} else {
is_write_unlock(space);
if (kr == KERN_SUCCESS)
- printf("warning: %s(%d) performed out-of-band resume on %s(%d)\n",
+ printf("warning: %s(%d) performed out-of-band resume on pid %d\n",
proc_name_address(current_task()->bsd_info), proc_pid(current_task()->bsd_info),
- proc_name_address(task->bsd_info), proc_pid(task->bsd_info));
+ task_pid(task));
}
return kr;
*/
kern_return_t
task_suspend2(
- register task_t task,
+ task_t task,
task_suspension_token_t *suspend_token)
{
kern_return_t kr;
*/
kern_return_t
task_resume_internal(
- register task_suspension_token_t task)
+ task_suspension_token_t task)
{
kern_return_t kr;
*/
kern_return_t
task_resume2(
- register task_suspension_token_t task)
+ task_suspension_token_t task)
{
kern_return_t kr;
*/
kern_return_t
task_pidsuspend(
- register task_t task)
+ task_t task)
{
kern_return_t kr;
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.
*/
kern_return_t
task_pidresume(
- register task_t task)
+ task_t task)
{
kern_return_t kr;
task_lock(task);
-#if (CONFIG_FREEZE && THAW_ON_RESUME)
+#if CONFIG_FREEZE
while (task->changing_freeze_state) {
task_unlock(task);
-#if (CONFIG_FREEZE && THAW_ON_RESUME)
- if ((kr == KERN_SUCCESS) && (task->frozen == TRUE)) {
-
- if (COMPRESSED_PAGER_IS_ACTIVE || DEFAULT_FREEZER_COMPRESSED_PAGER_IS_ACTIVE) {
-
- kr = KERN_SUCCESS;
- } else {
+#if CONFIG_FREEZE
- kr = vm_map_thaw(task->map);
- }
- }
task_lock(task);
if (kr == KERN_SUCCESS)
return (kr);
}
+
+#if DEVELOPMENT || DEBUG
+
+extern void IOSleep(int);
+
+kern_return_t
+task_disconnect_page_mappings(task_t task)
+{
+ int n;
+
+ if (task == TASK_NULL || task == kernel_task)
+ return (KERN_INVALID_ARGUMENT);
+
+ /*
+ * this function is used to strip all of the mappings from
+ * the pmap for the specified task to force the task to
+ * re-fault all of the pages it is actively using... this
+ * allows us to approximate the true working set of the
+ * specified task. We only engage if at least 1 of the
+ * threads in the task is runnable, but we want to continuously
+ * sweep (at least for a while - I've arbitrarily set the limit at
+ * 100 sweeps to be re-looked at as we gain experience) to get a better
+ * view into what areas within a page are being visited (as opposed to only
+ * seeing the first fault of a page after the task becomes
+ * runnable)... in the future I may
+ * try to block until awakened by a thread in this task
+ * being made runnable, but for now we'll periodically poll from the
+ * user level debug tool driving the sysctl
+ */
+ for (n = 0; n < 100; n++) {
+ thread_t thread;
+ boolean_t runnable;
+ boolean_t do_unnest;
+ int page_count;
+
+ runnable = FALSE;
+ do_unnest = FALSE;
+
+ task_lock(task);
+
+ queue_iterate(&task->threads, thread, thread_t, task_threads) {
+
+ if (thread->state & TH_RUN) {
+ runnable = TRUE;
+ break;
+ }
+ }
+ if (n == 0)
+ task->task_disconnected_count++;
+
+ if (task->task_unnested == FALSE) {
+ if (runnable == TRUE) {
+ task->task_unnested = TRUE;
+ do_unnest = TRUE;
+ }
+ }
+ task_unlock(task);
+
+ if (runnable == FALSE)
+ break;
+
+ KERNEL_DEBUG_CONSTANT_IST(KDEBUG_TRACE, (MACHDBG_CODE(DBG_MACH_WORKINGSET, VM_DISCONNECT_TASK_PAGE_MAPPINGS)) | DBG_FUNC_START,
+ task, do_unnest, task->task_disconnected_count, 0, 0);
+
+ page_count = vm_map_disconnect_page_mappings(task->map, do_unnest);
+
+ KERNEL_DEBUG_CONSTANT_IST(KDEBUG_TRACE, (MACHDBG_CODE(DBG_MACH_WORKINGSET, VM_DISCONNECT_TASK_PAGE_MAPPINGS)) | DBG_FUNC_END,
+ task, page_count, 0, 0, 0);
+
+ if ((n % 5) == 4)
+ IOSleep(1);
+ }
+ return (KERN_SUCCESS);
+}
+
+#endif
+
+
#if CONFIG_FREEZE
/*
* Conditions:
* The caller holds a reference to the task
*/
+extern void vm_wake_compactor_swapper();
+extern queue_head_t c_swapout_list_head;
+
kern_return_t
task_freeze(
- register task_t task,
+ task_t task,
uint32_t *purgeable_count,
uint32_t *wired_count,
uint32_t *clean_count,
boolean_t *shared,
boolean_t walk_only)
{
- kern_return_t kr;
+ kern_return_t kr = KERN_SUCCESS;
if (task == TASK_NULL || task == kernel_task)
return (KERN_INVALID_ARGUMENT);
task_unlock(task);
if (walk_only) {
- kr = vm_map_freeze_walk(task->map, purgeable_count, wired_count, clean_count, dirty_count, dirty_budget, shared);
+ panic("task_freeze - walk_only == TRUE");
} else {
kr = vm_map_freeze(task->map, purgeable_count, wired_count, clean_count, dirty_count, dirty_budget, shared);
}
task_unlock(task);
+ if (VM_CONFIG_COMPRESSOR_IS_PRESENT) {
+ vm_wake_compactor_swapper();
+ /*
+ * We do an explicit wakeup of the swapout thread here
+ * because the compact_and_swap routines don't have
+ * knowledge about these kind of "per-task packed c_segs"
+ * and so will not be evaluating whether we need to do
+ * a wakeup there.
+ */
+ thread_wakeup((event_t)&c_swapout_list_head);
+ }
+
return (kr);
}
* Conditions:
* The caller holds a reference to the task
*/
-extern void
-vm_consider_waking_compactor_swapper(void);
-
kern_return_t
task_thaw(
- register task_t task)
+ task_t task)
{
- kern_return_t kr;
-
if (task == TASK_NULL || task == kernel_task)
return (KERN_INVALID_ARGUMENT);
task_unlock(task);
return (KERN_FAILURE);
}
- task->changing_freeze_state = TRUE;
-
- if (DEFAULT_PAGER_IS_ACTIVE || DEFAULT_FREEZER_IS_ACTIVE) {
- task_unlock(task);
-
- kr = vm_map_thaw(task->map);
-
- task_lock(task);
-
- if (kr == KERN_SUCCESS)
- task->frozen = FALSE;
- } else {
- task->frozen = FALSE;
- kr = KERN_SUCCESS;
- }
-
- task->changing_freeze_state = FALSE;
- thread_wakeup(&task->changing_freeze_state);
+ task->frozen = FALSE;
task_unlock(task);
- if (COMPRESSED_PAGER_IS_ACTIVE || DEFAULT_FREEZER_COMPRESSED_PAGER_IS_ACTIVE) {
- vm_consider_waking_compactor_swapper();
- }
-
- return (kr);
+ return (KERN_SUCCESS);
}
#endif /* CONFIG_FREEZE */
return(kr);
}
+kern_return_t
+task_send_trace_memory(
+ task_t target_task,
+ __unused uint32_t pid,
+ __unused uint64_t uniqueid)
+{
+ kern_return_t kr = KERN_INVALID_ARGUMENT;
+ if (target_task == TASK_NULL)
+ return (KERN_INVALID_ARGUMENT);
+
+#if CONFIG_ATM
+ kr = atm_send_proc_inspect_notification(target_task,
+ pid,
+ uniqueid);
+
+#endif
+ return (kr);
+}
/*
* This routine was added, pretty much exclusively, for registering the
* RPC glue vector for in-kernel short circuited tasks. Rather than
return(KERN_INVALID_ARGUMENT);
switch (flavor) {
+
+#if CONFIG_ATM
+ case TASK_TRACE_MEMORY_INFO:
+ {
+ if (task_info_count != TASK_TRACE_MEMORY_INFO_COUNT)
+ return (KERN_INVALID_ARGUMENT);
+
+ assert(task_info_in != NULL);
+ task_trace_memory_info_t mem_info;
+ mem_info = (task_trace_memory_info_t) task_info_in;
+ kern_return_t kr = atm_register_trace_memory(task,
+ mem_info->user_memory_address,
+ mem_info->buffer_size);
+ return kr;
+ }
+
+#endif
default:
return (KERN_INVALID_ARGUMENT);
}
return (KERN_SUCCESS);
}
+int radar_20146450 = 1;
kern_return_t
task_info(
task_t task,
mach_msg_type_number_t *task_info_count)
{
kern_return_t error = KERN_SUCCESS;
+ mach_msg_type_number_t original_task_info_count;
if (task == TASK_NULL)
return (KERN_INVALID_ARGUMENT);
+ original_task_info_count = *task_info_count;
task_lock(task);
if ((task != current_task()) && (!task->active)) {
case TASK_THREAD_TIMES_INFO:
{
- register task_thread_times_info_t times_info;
- register thread_t thread;
+ task_thread_times_info_t times_info;
+ thread_t thread;
if (*task_info_count < TASK_THREAD_TIMES_INFO_COUNT) {
error = KERN_INVALID_ARGUMENT;
case TASK_ABSOLUTETIME_INFO:
{
task_absolutetime_info_t info;
- register thread_t thread;
+ thread_t thread;
if (*task_info_count < TASK_ABSOLUTETIME_INFO_COUNT) {
error = KERN_INVALID_ARGUMENT;
/* OBSOLETE */
case TASK_SCHED_RR_INFO:
{
- register policy_rr_base_t rr_base;
+ policy_rr_base_t rr_base;
uint32_t quantum_time;
uint64_t quantum_ns;
/* OBSOLETE */
case TASK_SCHED_TIMESHARE_INFO:
{
- register policy_timeshare_base_t ts_base;
+ policy_timeshare_base_t ts_base;
if (*task_info_count < POLICY_TIMESHARE_BASE_COUNT) {
error = KERN_INVALID_ARGUMENT;
case TASK_SECURITY_TOKEN:
{
- register security_token_t *sec_token_p;
+ security_token_t *sec_token_p;
if (*task_info_count < TASK_SECURITY_TOKEN_COUNT) {
error = KERN_INVALID_ARGUMENT;
case TASK_AUDIT_TOKEN:
{
- register audit_token_t *audit_token_p;
+ audit_token_t *audit_token_p;
if (*task_info_count < TASK_AUDIT_TOKEN_COUNT) {
error = KERN_INVALID_ARGUMENT;
case TASK_EVENTS_INFO:
{
- register task_events_info_t events_info;
- register thread_t thread;
+ task_events_info_t events_info;
+ thread_t thread;
if (*task_info_count < TASK_EVENTS_INFO_COUNT) {
error = KERN_INVALID_ARGUMENT;
break;
}
- task_power_info_locked(task, (task_power_info_t)task_info_out);
+ task_power_info_locked(task, (task_power_info_t)task_info_out, NULL, NULL);
+ break;
+ }
+
+ case TASK_POWER_INFO_V2:
+ {
+ if (*task_info_count < TASK_POWER_INFO_V2_COUNT) {
+ error = KERN_INVALID_ARGUMENT;
+ break;
+ }
+ task_power_info_v2_t tpiv2 = (task_power_info_v2_t) task_info_out;
+
+ uint64_t *task_energy = NULL;
+ task_power_info_locked(task, &tpiv2->cpu_energy, &tpiv2->gpu_energy, task_energy);
break;
}
task_vm_info_t vm_info;
vm_map_t map;
- if (*task_info_count < TASK_VM_INFO_COUNT) {
+ if (*task_info_count < TASK_VM_INFO_REV0_COUNT) {
error = KERN_INVALID_ARGUMENT;
break;
}
} else {
mach_vm_size_t volatile_virtual_size;
mach_vm_size_t volatile_resident_size;
+ mach_vm_size_t volatile_compressed_size;
mach_vm_size_t volatile_pmap_size;
+ mach_vm_size_t volatile_compressed_pmap_size;
kern_return_t kr;
if (flavor == TASK_VM_INFO_PURGEABLE) {
map,
&volatile_virtual_size,
&volatile_resident_size,
- &volatile_pmap_size);
+ &volatile_compressed_size,
+ &volatile_pmap_size,
+ &volatile_compressed_pmap_size);
if (kr == KERN_SUCCESS) {
vm_info->purgeable_volatile_pmap =
volatile_pmap_size;
+ if (radar_20146450) {
+ vm_info->compressed -=
+ volatile_compressed_pmap_size;
+ }
vm_info->purgeable_volatile_resident =
volatile_resident_size;
vm_info->purgeable_volatile_virtual =
volatile_virtual_size;
}
}
+ }
+ *task_info_count = TASK_VM_INFO_REV0_COUNT;
+
+ if (original_task_info_count >= TASK_VM_INFO_REV1_COUNT) {
+ vm_info->phys_footprint =
+ (mach_vm_size_t) get_task_phys_footprint(task);
+ *task_info_count = TASK_VM_INFO_REV1_COUNT;
+ }
+ if (original_task_info_count >= TASK_VM_INFO_REV2_COUNT) {
+ vm_info->min_address = map->min_offset;
+ vm_info->max_address = map->max_offset;
+ *task_info_count = TASK_VM_INFO_REV2_COUNT;
+ }
+
+ if (task != kernel_task) {
vm_map_unlock_read(map);
}
- *task_info_count = TASK_VM_INFO_COUNT;
break;
}
+ case TASK_WAIT_STATE_INFO:
+ {
+ /*
+ * Deprecated flavor. Currently allowing some results until all users
+ * stop calling it. The results may not be accurate.
+ */
+ task_wait_state_info_t wait_state_info;
+ uint64_t total_sfi_ledger_val = 0;
+
+ if (*task_info_count < TASK_WAIT_STATE_INFO_COUNT) {
+ error = KERN_INVALID_ARGUMENT;
+ break;
+ }
+
+ wait_state_info = (task_wait_state_info_t) task_info_out;
+
+ wait_state_info->total_wait_state_time = 0;
+ bzero(wait_state_info->_reserved, sizeof(wait_state_info->_reserved));
+
+#if CONFIG_SCHED_SFI
+ int i, prev_lentry = -1;
+ int64_t val_credit, val_debit;
+
+ for (i = 0; i < MAX_SFI_CLASS_ID; i++){
+ val_credit =0;
+ /*
+ * checking with prev_lentry != entry ensures adjacent classes
+ * which share the same ledger do not add wait times twice.
+ * Note: Use ledger() call to get data for each individual sfi class.
+ */
+ if (prev_lentry != task_ledgers.sfi_wait_times[i] &&
+ KERN_SUCCESS == ledger_get_entries(task->ledger,
+ task_ledgers.sfi_wait_times[i], &val_credit, &val_debit)) {
+ total_sfi_ledger_val += val_credit;
+ }
+ prev_lentry = task_ledgers.sfi_wait_times[i];
+ }
+
+#endif /* CONFIG_SCHED_SFI */
+ wait_state_info->total_wait_sfi_state_time = total_sfi_ledger_val;
+ *task_info_count = TASK_WAIT_STATE_INFO_COUNT;
+
+ break;
+ }
+ case TASK_VM_INFO_PURGEABLE_ACCOUNT:
+ {
+#if DEVELOPMENT || DEBUG
+ pvm_account_info_t acnt_info;
+
+ if (*task_info_count < PVM_ACCOUNT_INFO_COUNT) {
+ error = KERN_INVALID_ARGUMENT;
+ break;
+ }
+
+ if (task_info_out == NULL) {
+ error = KERN_INVALID_ARGUMENT;
+ break;
+ }
+
+ acnt_info = (pvm_account_info_t) task_info_out;
+
+ error = vm_purgeable_account(task, acnt_info);
+
+ *task_info_count = PVM_ACCOUNT_INFO_COUNT;
+
+ break;
+#else /* DEVELOPMENT || DEBUG */
+ error = KERN_NOT_SUPPORTED;
+ break;
+#endif /* DEVELOPMENT || DEBUG */
+ }
+ case TASK_FLAGS_INFO:
+ {
+ task_flags_info_t flags_info;
+
+ if (*task_info_count < TASK_FLAGS_INFO_COUNT) {
+ error = KERN_INVALID_ARGUMENT;
+ break;
+ }
+
+ flags_info = (task_flags_info_t)task_info_out;
+
+ /* only publish the 64-bit flag of the task */
+ flags_info->flags = task->t_flags & TF_64B_ADDR;
+
+ *task_info_count = TASK_FLAGS_INFO_COUNT;
+ break;
+ }
+
+ case TASK_DEBUG_INFO_INTERNAL:
+ {
+#if DEVELOPMENT || DEBUG
+ task_debug_info_internal_t dbg_info;
+ if (*task_info_count < TASK_DEBUG_INFO_INTERNAL_COUNT) {
+ error = KERN_NOT_SUPPORTED;
+ break;
+ }
+
+ if (task_info_out == NULL) {
+ error = KERN_INVALID_ARGUMENT;
+ break;
+ }
+ dbg_info = (task_debug_info_internal_t) task_info_out;
+ dbg_info->ipc_space_size = 0;
+ if (task->itk_space){
+ dbg_info->ipc_space_size = task->itk_space->is_table_size;
+ }
+
+ error = KERN_SUCCESS;
+ *task_info_count = TASK_DEBUG_INFO_INTERNAL_COUNT;
+ break;
+#else /* DEVELOPMENT || DEBUG */
+ error = KERN_NOT_SUPPORTED;
+ break;
+#endif /* DEVELOPMENT || DEBUG */
+ }
default:
error = KERN_INVALID_ARGUMENT;
}
void
task_power_info_locked(
task_t task,
- task_power_info_t info)
+ task_power_info_t info,
+ gpu_energy_data_t ginfo,
+ uint64_t *task_energy)
{
thread_t thread;
ledger_amount_t tmp;
info->total_user = task->total_user_time;
info->total_system = task->total_system_time;
+ if (task_energy) {
+ *task_energy = task->task_energy;
+ }
+
+ if (ginfo) {
+ ginfo->task_gpu_utilisation = task->task_gpu_ns;
+ }
+
queue_iterate(&task->threads, thread, thread_t, task_threads) {
uint64_t tval;
spl_t x;
info->task_timer_wakeups_bin_1 += thread->thread_timer_wakeups_bin_1;
info->task_timer_wakeups_bin_2 += thread->thread_timer_wakeups_bin_2;
+ if (task_energy) {
+ *task_energy += ml_energy_stat(thread);
+ }
+
tval = timer_grab(&thread->user_timer);
info->total_user += tval;
info->total_user += tval;
}
+ if (ginfo) {
+ ginfo->task_gpu_utilisation += ml_gpu_stat(thread);
+ }
+ thread_unlock(thread);
+ splx(x);
+ }
+}
+
+/*
+ * task_gpu_utilisation
+ *
+ * Returns the total gpu time used by the all the threads of the task
+ * (both dead and alive)
+ */
+uint64_t
+task_gpu_utilisation(
+ task_t task)
+{
+ uint64_t gpu_time = 0;
+ thread_t thread;
+
+ task_lock(task);
+ gpu_time += task->task_gpu_ns;
+
+ queue_iterate(&task->threads, thread, thread_t, task_threads) {
+ spl_t x;
+ x = splsched();
+ thread_lock(thread);
+ gpu_time += ml_gpu_stat(thread);
+ thread_unlock(thread);
+ splx(x);
+ }
+
+ task_unlock(task);
+ return gpu_time;
+}
+
+/*
+ * task_energy
+ *
+ * Returns the total energy used by the all the threads of the task
+ * (both dead and alive)
+ */
+uint64_t
+task_energy(
+ task_t task)
+{
+ uint64_t energy = 0;
+ thread_t thread;
+
+ task_lock(task);
+ energy += task->task_energy;
+
+ queue_iterate(&task->threads, thread, thread_t, task_threads) {
+ spl_t x;
+ x = splsched();
+ thread_lock(thread);
+ energy += ml_energy_stat(thread);
thread_unlock(thread);
splx(x);
}
+
+ task_unlock(task);
+ return energy;
}
kern_return_t
thread_t thread;
spl_t x;
- /* assert(task == current_task()); */ /* bogus assert 4803227 4807483 */
-
task_lock(task);
task->vtimers |= which;
uint32_t *microsecs)
{
thread_t thread = current_thread();
- uint32_t tdelt;
- clock_sec_t secs;
+ uint32_t tdelt = 0;
+ clock_sec_t secs = 0;
uint64_t tsum;
assert(task == current_task());
- assert(task->vtimers & which);
+ spl_t s = splsched();
+ thread_lock(thread);
- secs = tdelt = 0;
+ if ((task->vtimers & which) != (uint32_t)which) {
+ thread_unlock(thread);
+ splx(s);
+ return;
+ }
switch (which) {
break;
}
+ thread_unlock(thread);
+ splx(s);
}
/*
task_t task,
processor_set_t *pset)
{
- if (!task->active)
- return(KERN_FAILURE);
+ if (!task || !task->active)
+ return KERN_FAILURE;
*pset = &pset0;
- return (KERN_SUCCESS);
+ return KERN_SUCCESS;
}
+uint64_t
+get_task_dispatchqueue_offset(
+ task_t task)
+{
+ return task->dispatchqueue_offset;
+}
/*
* task_policy
return(KERN_FAILURE);
}
-#if FAST_TAS
-kern_return_t
-task_set_ras_pc(
- task_t task,
- vm_offset_t pc,
- vm_offset_t endpc)
-{
- extern int fast_tas_debug;
-
- if (fast_tas_debug) {
- printf("task 0x%x: setting fast_tas to [0x%x, 0x%x]\n",
- task, pc, endpc);
- }
- task_lock(task);
- task->fast_tas_base = pc;
- task->fast_tas_end = endpc;
- task_unlock(task);
- return KERN_SUCCESS;
-}
-#else /* FAST_TAS */
kern_return_t
task_set_ras_pc(
__unused task_t task,
{
return KERN_FAILURE;
}
-#endif /* FAST_TAS */
void
task_synchronizer_destroy_all(task_t task)
{
- semaphore_t semaphore;
-
/*
* Destroy owned semaphores
*/
-
- while (!queue_empty(&task->semaphore_list)) {
- semaphore = (semaphore_t) queue_first(&task->semaphore_list);
- (void) semaphore_destroy(task, semaphore);
- }
+ semaphore_destroy_all(task);
}
/*
return ret;
}
-#if CONFIG_JETSAM
+#if CONFIG_MEMORYSTATUS
#define HWM_USERCORE_MINSPACE 250 // free space (in MB) required *after* core file creation
void __attribute__((noinline))
-THIS_PROCESS_CROSSED_HIGH_WATERMARK__SENDING_EXC_RESOURCE(int max_footprint_mb)
+PROC_CROSSED_HIGH_WATERMARK__SEND_EXC_RESOURCE_AND_SUSPEND(int max_footprint_mb, boolean_t is_fatal)
{
task_t task = current_task();
int pid = 0;
- char *procname = (char *) "unknown";
+ const char *procname = "unknown";
mach_exception_data_type_t code[EXCEPTION_CODE_MAX];
#ifdef MACH_BSD
pid = proc_selfpid();
+
+ if (pid == 1) {
+ /*
+ * Cannot have ReportCrash analyzing
+ * a suspended initproc.
+ */
+ return;
+ }
+
if (task->bsd_info != NULL)
procname = proc_name_address(current_task()->bsd_info);
#endif
-
+#if CONFIG_COREDUMP
if (hwm_user_cores) {
int error;
uint64_t starttime, end;
* be filling up the disk; and ignore the core size resource limit for this
* core file.
*/
- if ((error = coredump(current_task()->bsd_info, HWM_USERCORE_MINSPACE, 1)) != 0) {
+ if ((error = coredump(current_task()->bsd_info, HWM_USERCORE_MINSPACE, COREDUMP_IGNORE_ULIMIT)) != 0) {
printf("couldn't take coredump of %s[%d]: %d\n", procname, pid, error);
}
/*
printf("coredump of %s[%d] taken in %d secs %d microsecs\n",
proc_name_address(current_task()->bsd_info), pid, (int)secs, microsecs);
}
+#endif /* CONFIG_COREDUMP */
if (disable_exc_resource) {
printf("process %s[%d] crossed memory high watermark (%d MB); EXC_RESOURCE "
return;
}
+ /*
+ * A task that has triggered an EXC_RESOURCE, should not be
+ * jetsammed when the device is under memory pressure. Here
+ * we set the P_MEMSTAT_TERMINATED flag so that the process
+ * will be skipped if the memorystatus_thread wakes up.
+ */
+ proc_memstat_terminated(current_task()->bsd_info, TRUE);
+
printf("process %s[%d] crossed memory high watermark (%d MB); sending "
"EXC_RESOURCE.\n", procname, pid, max_footprint_mb);
EXC_RESOURCE_ENCODE_TYPE(code[0], RESOURCE_TYPE_MEMORY);
EXC_RESOURCE_ENCODE_FLAVOR(code[0], FLAVOR_HIGH_WATERMARK);
EXC_RESOURCE_HWM_ENCODE_LIMIT(code[0], max_footprint_mb);
- exception_triage(EXC_RESOURCE, code, EXCEPTION_CODE_MAX);
+
+ /* Do not generate a corpse fork if the violation is a fatal one */
+ if (is_fatal || exc_via_corpse_forking == 0) {
+ /* Do not send a EXC_RESOURCE is corpse_for_fatal_memkill is set */
+ if (corpse_for_fatal_memkill == 0) {
+ /*
+ * Use the _internal_ variant so that no user-space
+ * process can resume our task from under us.
+ */
+ task_suspend_internal(task);
+ exception_triage(EXC_RESOURCE, code, EXCEPTION_CODE_MAX);
+ task_resume_internal(task);
+ }
+ } else {
+ task_enqueue_exception_with_corpse(task, code, EXCEPTION_CODE_MAX);
+ }
+
+ /*
+ * After the EXC_RESOURCE has been handled, we must clear the
+ * P_MEMSTAT_TERMINATED flag so that the process can again be
+ * considered for jetsam if the memorystatus_thread wakes up.
+ */
+ proc_memstat_terminated(current_task()->bsd_info, FALSE); /* clear the flag */
}
/*
void
task_footprint_exceeded(int warning, __unused const void *param0, __unused const void *param1)
{
- ledger_amount_t max_footprint_mb;
+ ledger_amount_t max_footprint, max_footprint_mb;
+ task_t task;
+ boolean_t is_fatal;
+ boolean_t trigger_exception;
if (warning == LEDGER_WARNING_DIPPED_BELOW) {
/*
return;
}
- ledger_get_limit(current_task()->ledger, task_ledgers.phys_footprint, &max_footprint_mb);
- max_footprint_mb >>= 20;
+ task = current_task();
+
+ ledger_get_limit(task->ledger, task_ledgers.phys_footprint, &max_footprint);
+ max_footprint_mb = max_footprint >> 20;
+
+ /*
+ * Capture the trigger exception flag before turning off the exception.
+ */
+ trigger_exception = task->rusage_cpu_flags & TASK_RUSECPU_FLAGS_PHYS_FOOTPRINT_EXCEPTION ? TRUE : FALSE;
+
+ is_fatal = memorystatus_turnoff_exception_and_get_fatalness((warning == LEDGER_WARNING_ROSE_ABOVE) ? TRUE : FALSE, (int)max_footprint_mb);
/*
* If this an actual violation (not a warning),
* generate a non-fatal high watermark EXC_RESOURCE.
*/
- if ((warning == 0) && (current_task()->rusage_cpu_flags & TASK_RUSECPU_FLAGS_PHYS_FOOTPRINT_EXCEPTION)) {
- THIS_PROCESS_CROSSED_HIGH_WATERMARK__SENDING_EXC_RESOURCE((int)max_footprint_mb);
+ if ((warning == 0) && trigger_exception) {
+ PROC_CROSSED_HIGH_WATERMARK__SEND_EXC_RESOURCE_AND_SUSPEND((int)max_footprint_mb, is_fatal);
}
memorystatus_on_ledger_footprint_exceeded((warning == LEDGER_WARNING_ROSE_ABOVE) ? TRUE : FALSE,
- (int)max_footprint_mb);
+ is_fatal);
}
extern int proc_check_footprint_priv(void);
if ((error = proc_check_footprint_priv())) {
return (KERN_NO_ACCESS);
}
-
- return task_set_phys_footprint_limit_internal(task, new_limit_mb, old_limit_mb, FALSE);
+
+ return task_set_phys_footprint_limit_internal(task, new_limit_mb, old_limit_mb, FALSE);
+}
+
+kern_return_t
+task_convert_phys_footprint_limit(
+ int limit_mb,
+ int *converted_limit_mb)
+{
+ if (limit_mb == -1) {
+ /*
+ * No limit
+ */
+ if (max_task_footprint != 0) {
+ *converted_limit_mb = (int)(max_task_footprint / 1024 / 1024); /* bytes to MB */
+ } else {
+ *converted_limit_mb = (int)(LEDGER_LIMIT_INFINITY >> 20);
+ }
+ } else {
+ /* nothing to convert */
+ *converted_limit_mb = limit_mb;
+ }
+ return (KERN_SUCCESS);
}
+
kern_return_t
task_set_phys_footprint_limit_internal(
task_t task,
ledger_get_limit(task->ledger, task_ledgers.phys_footprint, &old);
if (old_limit_mb) {
- *old_limit_mb = old >> 20;
+ /*
+ * Check that limit >> 20 will not give an "unexpected" 32-bit
+ * result. There are, however, implicit assumptions that -1 mb limit
+ * equates to LEDGER_LIMIT_INFINITY.
+ */
+ assert(((old & 0xFFF0000000000000LL) == 0) || (old == LEDGER_LIMIT_INFINITY));
+ *old_limit_mb = (int)(old >> 20);
}
if (new_limit_mb == -1) {
*/
ledger_set_limit(task->ledger, task_ledgers.phys_footprint,
max_task_footprint ? max_task_footprint : LEDGER_LIMIT_INFINITY,
- max_task_footprint ? PHYS_FOOTPRINT_WARNING_LEVEL : 0);
+ max_task_footprint ? max_task_footprint_warning_level : 0);
return (KERN_SUCCESS);
}
ledger_set_limit(task->ledger, task_ledgers.phys_footprint,
(ledger_amount_t)new_limit_mb << 20, PHYS_FOOTPRINT_WARNING_LEVEL);
+ if (task == current_task()) {
+ ledger_check_new_balance(task->ledger, task_ledgers.phys_footprint);
+ }
+
task_unlock(task);
return (KERN_SUCCESS);
ledger_amount_t limit;
ledger_get_limit(task->ledger, task_ledgers.phys_footprint, &limit);
- *limit_mb = limit >> 20;
+ /*
+ * Check that limit >> 20 will not give an "unexpected" signed, 32-bit
+ * result. There are, however, implicit assumptions that -1 mb limit
+ * equates to LEDGER_LIMIT_INFINITY.
+ */
+ assert(((limit & 0xFFF0000000000000LL) == 0) || (limit == LEDGER_LIMIT_INFINITY));
+ *limit_mb = (int)(limit >> 20);
return (KERN_SUCCESS);
}
-#else /* CONFIG_JETSAM */
+#else /* CONFIG_MEMORYSTATUS */
kern_return_t
task_set_phys_footprint_limit(
__unused task_t task,
{
return (KERN_FAILURE);
}
-#endif /* CONFIG_JETSAM */
+#endif /* CONFIG_MEMORYSTATUS */
/*
* We need to export some functions to other components that
return (FALSE);
}
-int
-check_for_tasksuspend(task_t task)
+boolean_t is_corpsetask(task_t t)
{
-
- if (task == TASK_NULL)
- return (0);
-
- return (task->suspend_count > 0);
+ return (task_is_a_corpse(t));
}
#undef current_task
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;
+/* defined in bsd/kern/kern_prot.c */
+extern int get_audit_token_pid(audit_token_t *audit_token);
- queue_iterate(&task->threads, thread, thread_t, task_threads) {
- if (thread->thread_id == tid)
- return(thread);
- }
- return(THREAD_NULL);
+int task_pid(task_t task)
+{
+ if (task)
+ return get_audit_token_pid(&task->audit_token);
+ return -1;
}
-#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.
+ * This routine finds a thread in a task by its unique id
+ * Returns a referenced thread or THREAD_NULL if the thread was not found
+ *
+ * TODO: This is super inefficient - it's an O(threads in task) list walk!
+ * We should make a tid hash, or transition all tid clients to thread ports
+ *
+ * Precondition: No locks held (will take task lock)
*/
-
-void
-tasklabel_lock2(
- task_t a,
- task_t b)
+thread_t
+task_findtid(task_t task, uint64_t tid)
{
- labelh_reference(a->label);
- labelh_reference(b->label);
-}
+ thread_t self = current_thread();
+ thread_t found_thread = THREAD_NULL;
+ thread_t iter_thread = THREAD_NULL;
-void
-tasklabel_unlock2(
- task_t a,
- task_t b)
-{
- labelh_release(a->label);
- labelh_release(b->label);
-}
+ /* Short-circuit the lookup if we're looking up ourselves */
+ if (tid == self->thread_id || tid == TID_NULL) {
+ assert(self->task == task);
-void
-mac_task_label_update_internal(
- struct label *pl,
- struct task *task)
-{
+ thread_reference(self);
- 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);
-}
+ return self;
+ }
-void
-mac_task_label_modify(
- struct task *task,
- void *arg,
- void (*f) (struct label *l, void *arg))
-{
+ task_lock(task);
- tasklabel_lock(task);
- task->label = labelh_modify(task->label);
- (*f)(&task->maclabel, arg);
- tasklabel_unlock(task);
-}
+ queue_iterate(&task->threads, iter_thread, thread_t, task_threads) {
+ if (iter_thread->thread_id == tid) {
+ found_thread = iter_thread;
+ thread_reference(found_thread);
+ break;
+ }
+ }
-struct label *
-mac_task_get_label(struct task *task)
-{
- return (&task->maclabel);
+ task_unlock(task);
+
+ return (found_thread);
}
-#endif
+
/*
* Control the CPU usage monitor for a task.
}
#endif /* CONFIG_NOMONITORS */
- if (*rate_hz < 0) {
+ if (*rate_hz <= 0) {
task_unlock(task);
return KERN_INVALID_ARGUMENT;
}
* remove the limit & callback on the wakeups ledger entry.
*/
#if CONFIG_TELEMETRY
- telemetry_task_ctl_locked(current_task(), TF_WAKEMON_WARNING, 0);
+ telemetry_task_ctl_locked(task, TF_WAKEMON_WARNING, 0);
#endif
ledger_disable_refill(ledger, task_ledgers.interrupt_wakeups);
ledger_disable_callback(ledger, task_ledgers.interrupt_wakeups);
#endif
if (warning == 0) {
- THIS_PROCESS_IS_CAUSING_TOO_MANY_WAKEUPS__SENDING_EXC_RESOURCE();
+ SENDING_NOTIFICATION__THIS_PROCESS_IS_CAUSING_TOO_MANY_WAKEUPS();
}
}
void __attribute__((noinline))
-THIS_PROCESS_IS_CAUSING_TOO_MANY_WAKEUPS__SENDING_EXC_RESOURCE(void)
+SENDING_NOTIFICATION__THIS_PROCESS_IS_CAUSING_TOO_MANY_WAKEUPS(void)
{
- task_t task = current_task();
- int pid = 0;
- char *procname = (char *) "unknown";
- uint64_t observed_wakeups_rate;
- uint64_t permitted_wakeups_rate;
- uint64_t observation_interval;
- mach_exception_data_type_t code[EXCEPTION_CODE_MAX];
- struct ledger_entry_info lei;
+ task_t task = current_task();
+ int pid = 0;
+ const char *procname = "unknown";
+ boolean_t fatal;
+ kern_return_t kr;
+#ifdef EXC_RESOURCE_MONITORS
+ mach_exception_data_type_t code[EXCEPTION_CODE_MAX];
+#endif /* EXC_RESOURCE_MONITORS */
+ struct ledger_entry_info lei;
#ifdef MACH_BSD
pid = proc_selfpid();
/*
* Disable the exception notification so we don't overwhelm
* the listener with an endless stream of redundant exceptions.
+ * TODO: detect whether another thread is already reporting the violation.
*/
uint32_t flags = WAKEMON_DISABLE;
task_wakeups_monitor_ctl(task, &flags, NULL);
- observed_wakeups_rate = (lei.lei_balance * (int64_t)NSEC_PER_SEC) / lei.lei_last_refill;
- permitted_wakeups_rate = lei.lei_limit / task_wakeups_monitor_interval;
- observation_interval = lei.lei_refill_period / NSEC_PER_SEC;
+ fatal = task->rusage_cpu_flags & TASK_RUSECPU_FLAGS_FATAL_WAKEUPSMON;
+ trace_resource_violation(RMON_CPUWAKES_VIOLATED, &lei);
+ printf("process %s[%d] caught waking the CPU %llu times "
+ "over ~%llu seconds, averaging %llu wakes / second and "
+ "violating a %slimit of %llu wakes over %llu seconds.\n",
+ procname, pid,
+ lei.lei_balance, lei.lei_last_refill / NSEC_PER_SEC,
+ lei.lei_last_refill == 0 ? 0 :
+ (NSEC_PER_SEC * lei.lei_balance / lei.lei_last_refill),
+ fatal ? "FATAL " : "",
+ lei.lei_limit, lei.lei_refill_period / NSEC_PER_SEC);
+
+ kr = send_resource_violation(send_cpu_wakes_violation, task, &lei,
+ fatal ? kRNFatalLimitFlag : 0);
+ if (kr) {
+ printf("send_resource_violation(CPU wakes, ...): error %#x\n", kr);
+ }
+#ifdef EXC_RESOURCE_MONITORS
if (disable_exc_resource) {
printf("process %s[%d] caught causing excessive wakeups. EXC_RESOURCE "
"supressed by a boot-arg\n", procname, pid);
return;
}
- printf("process %s[%d] caught causing excessive wakeups. Observed wakeups rate "
- "(per sec): %lld; Maximum permitted wakeups rate (per sec): %lld; Observation "
- "period: %lld seconds; Task lifetime number of wakeups: %lld\n",
- procname, pid, observed_wakeups_rate, permitted_wakeups_rate,
- observation_interval, lei.lei_credit);
+ if (audio_active) {
+ printf("process %s[%d] caught causing excessive wakeups. EXC_RESOURCE "
+ "supressed due to audio playback\n", procname, pid);
+ return;
+ }
+ if (lei.lei_last_refill == 0) {
+ printf("process %s[%d] caught causing excessive wakeups. EXC_RESOURCE "
+ "supressed due to lei.lei_last_refill = 0 \n", procname, pid);
+ }
code[0] = code[1] = 0;
EXC_RESOURCE_ENCODE_TYPE(code[0], RESOURCE_TYPE_WAKEUPS);
EXC_RESOURCE_ENCODE_FLAVOR(code[0], FLAVOR_WAKEUPS_MONITOR);
- EXC_RESOURCE_CPUMONITOR_ENCODE_WAKEUPS_PERMITTED(code[0], task_wakeups_monitor_rate);
- EXC_RESOURCE_CPUMONITOR_ENCODE_OBSERVATION_INTERVAL(code[0], observation_interval);
- EXC_RESOURCE_CPUMONITOR_ENCODE_WAKEUPS_OBSERVED(code[1], lei.lei_balance * (int64_t)NSEC_PER_SEC / lei.lei_last_refill);
+ EXC_RESOURCE_CPUMONITOR_ENCODE_WAKEUPS_PERMITTED(code[0],
+ NSEC_PER_SEC * lei.lei_limit / lei.lei_refill_period);
+ EXC_RESOURCE_CPUMONITOR_ENCODE_OBSERVATION_INTERVAL(code[0],
+ lei.lei_last_refill);
+ EXC_RESOURCE_CPUMONITOR_ENCODE_WAKEUPS_OBSERVED(code[1],
+ NSEC_PER_SEC * lei.lei_balance / lei.lei_last_refill);
exception_triage(EXC_RESOURCE, code, EXCEPTION_CODE_MAX);
+#endif /* EXC_RESOURCE_MONITORS */
- if (task->rusage_cpu_flags & TASK_RUSECPU_FLAGS_FATAL_WAKEUPSMON) {
+ if (fatal) {
task_terminate_internal(task);
}
}
+
+static boolean_t
+global_update_logical_writes(int64_t io_delta)
+{
+ int64_t old_count, new_count;
+ boolean_t needs_telemetry;
+
+ do {
+ new_count = old_count = global_logical_writes_count;
+ new_count += io_delta;
+ if (new_count >= io_telemetry_limit) {
+ new_count = 0;
+ needs_telemetry = TRUE;
+ } else {
+ needs_telemetry = FALSE;
+ }
+ } while(!OSCompareAndSwap64(old_count, new_count, &global_logical_writes_count));
+ return needs_telemetry;
+}
+
+void task_update_logical_writes(task_t task, uint32_t io_size, int flags, void *vp)
+{
+ int64_t io_delta = 0;
+ boolean_t needs_telemetry = FALSE;
+
+ if ((!task) || (!io_size) || (!vp))
+ return;
+
+ KERNEL_DEBUG_CONSTANT((MACHDBG_CODE(DBG_MACH_VM, VM_DATA_WRITE)) | DBG_FUNC_NONE,
+ task_pid(task), io_size, flags, (uintptr_t)VM_KERNEL_ADDRPERM(vp), 0);
+ DTRACE_IO4(logical_writes, struct task *, task, uint32_t, io_size, int, flags, vnode *, vp);
+ switch(flags) {
+ case TASK_WRITE_IMMEDIATE:
+ OSAddAtomic64(io_size, (SInt64 *)&(task->task_immediate_writes));
+ ledger_credit(task->ledger, task_ledgers.logical_writes, io_size);
+ break;
+ case TASK_WRITE_DEFERRED:
+ OSAddAtomic64(io_size, (SInt64 *)&(task->task_deferred_writes));
+ ledger_credit(task->ledger, task_ledgers.logical_writes, io_size);
+ break;
+ case TASK_WRITE_INVALIDATED:
+ OSAddAtomic64(io_size, (SInt64 *)&(task->task_invalidated_writes));
+ ledger_debit(task->ledger, task_ledgers.logical_writes, io_size);
+ break;
+ case TASK_WRITE_METADATA:
+ OSAddAtomic64(io_size, (SInt64 *)&(task->task_metadata_writes));
+ ledger_credit(task->ledger, task_ledgers.logical_writes, io_size);
+ break;
+ }
+
+ io_delta = (flags == TASK_WRITE_INVALIDATED) ? ((int64_t)io_size * -1ll) : ((int64_t)io_size);
+ if (io_telemetry_limit != 0) {
+ /* If io_telemetry_limit is 0, disable global updates and I/O telemetry */
+ needs_telemetry = global_update_logical_writes(io_delta);
+ if (needs_telemetry) {
+ act_set_io_telemetry_ast(current_thread());
+ }
+ }
+}
+
+/*
+ * Control the I/O monitor for a task.
+ */
+kern_return_t
+task_io_monitor_ctl(task_t task, uint32_t *flags)
+{
+ ledger_t ledger = task->ledger;
+
+ task_lock(task);
+ if (*flags & IOMON_ENABLE) {
+ /* Configure the physical I/O ledger */
+ ledger_set_limit(ledger, task_ledgers.physical_writes, (task_iomon_limit_mb * 1024 * 1024), 0);
+ ledger_set_period(ledger, task_ledgers.physical_writes, (task_iomon_interval_secs * NSEC_PER_SEC));
+
+ /* Configure the logical I/O ledger */
+ ledger_set_limit(ledger, task_ledgers.logical_writes, (task_iomon_limit_mb * 1024 * 1024), 0);
+ ledger_set_period(ledger, task_ledgers.logical_writes, (task_iomon_interval_secs * NSEC_PER_SEC));
+
+ } else if (*flags & IOMON_DISABLE) {
+ /*
+ * Caller wishes to disable I/O monitor on the task.
+ */
+ ledger_disable_refill(ledger, task_ledgers.physical_writes);
+ ledger_disable_callback(ledger, task_ledgers.physical_writes);
+ ledger_disable_refill(ledger, task_ledgers.logical_writes);
+ ledger_disable_callback(ledger, task_ledgers.logical_writes);
+ }
+
+ task_unlock(task);
+ return KERN_SUCCESS;
+}
+
+void
+task_io_rate_exceeded(int warning, const void *param0, __unused const void *param1)
+{
+ if (warning == 0) {
+ SENDING_NOTIFICATION__THIS_PROCESS_IS_CAUSING_TOO_MUCH_IO((int)param0);
+ }
+}
+
+void __attribute__((noinline)) SENDING_NOTIFICATION__THIS_PROCESS_IS_CAUSING_TOO_MUCH_IO(int flavor)
+{
+ int pid = 0;
+ task_t task = current_task();
+#ifdef EXC_RESOURCE_MONITORS
+ mach_exception_data_type_t code[EXCEPTION_CODE_MAX];
+#endif /* EXC_RESOURCE_MONITORS */
+ struct ledger_entry_info lei;
+ kern_return_t kr;
+
+#ifdef MACH_BSD
+ pid = proc_selfpid();
+#endif
+ /*
+ * Get the ledger entry info. We need to do this before disabling the exception
+ * to get correct values for all fields.
+ */
+ switch(flavor) {
+ case FLAVOR_IO_PHYSICAL_WRITES:
+ ledger_get_entry_info(task->ledger, task_ledgers.physical_writes, &lei);
+ break;
+ case FLAVOR_IO_LOGICAL_WRITES:
+ ledger_get_entry_info(task->ledger, task_ledgers.logical_writes, &lei);
+ break;
+ }
+
+
+ /*
+ * Disable the exception notification so we don't overwhelm
+ * the listener with an endless stream of redundant exceptions.
+ * TODO: detect whether another thread is already reporting the violation.
+ */
+ uint32_t flags = IOMON_DISABLE;
+ task_io_monitor_ctl(task, &flags);
+
+ if (flavor == FLAVOR_IO_LOGICAL_WRITES) {
+ trace_resource_violation(RMON_LOGWRITES_VIOLATED, &lei);
+ }
+ printf("process [%d] caught causing excessive I/O (flavor: %d). Task I/O: %lld MB. [Limit : %lld MB per %lld secs]\n",
+ pid, flavor, (lei.lei_balance / (1024 * 1024)), (lei.lei_limit / (1024 * 1024)), (lei.lei_refill_period / NSEC_PER_SEC));
+
+ kr = send_resource_violation(send_disk_writes_violation, task, &lei, kRNFlagsNone);
+ if (kr) {
+ printf("send_resource_violation(disk_writes, ...): error %#x\n", kr);
+ }
+
+#ifdef EXC_RESOURCE_MONITORS
+ code[0] = code[1] = 0;
+ EXC_RESOURCE_ENCODE_TYPE(code[0], RESOURCE_TYPE_IO);
+ EXC_RESOURCE_ENCODE_FLAVOR(code[0], flavor);
+ EXC_RESOURCE_IO_ENCODE_INTERVAL(code[0], (lei.lei_refill_period / NSEC_PER_SEC));
+ EXC_RESOURCE_IO_ENCODE_LIMIT(code[0], (lei.lei_limit / (1024 * 1024)));
+ EXC_RESOURCE_IO_ENCODE_OBSERVED(code[1], (lei.lei_balance / (1024 * 1024)));
+ exception_triage(EXC_RESOURCE, code, EXCEPTION_CODE_MAX);
+#endif /* EXC_RESOURCE_MONITORS */
+}
+
+/* Placeholders for the task set/get voucher interfaces */
+kern_return_t
+task_get_mach_voucher(
+ task_t task,
+ mach_voucher_selector_t __unused which,
+ ipc_voucher_t *voucher)
+{
+ if (TASK_NULL == task)
+ return KERN_INVALID_TASK;
+
+ *voucher = NULL;
+ return KERN_SUCCESS;
+}
+
+kern_return_t
+task_set_mach_voucher(
+ task_t task,
+ ipc_voucher_t __unused voucher)
+{
+ if (TASK_NULL == task)
+ return KERN_INVALID_TASK;
+
+ return KERN_SUCCESS;
+}
+
+kern_return_t
+task_swap_mach_voucher(
+ task_t task,
+ ipc_voucher_t new_voucher,
+ ipc_voucher_t *in_out_old_voucher)
+{
+ if (TASK_NULL == task)
+ return KERN_INVALID_TASK;
+
+ *in_out_old_voucher = new_voucher;
+ return KERN_SUCCESS;
+}
+
+void task_set_gpu_denied(task_t task, boolean_t denied)
+{
+ task_lock(task);
+
+ if (denied) {
+ task->t_flags |= TF_GPU_DENIED;
+ } else {
+ task->t_flags &= ~TF_GPU_DENIED;
+ }
+
+ task_unlock(task);
+}
+
+boolean_t task_is_gpu_denied(task_t task)
+{
+ /* We don't need the lock to read this flag */
+ return (task->t_flags & TF_GPU_DENIED) ? TRUE : FALSE;
+}
+
+
+uint64_t get_task_memory_region_count(task_t task)
+{
+ vm_map_t map;
+ map = (task == kernel_task) ? kernel_map: task->map;
+ return((uint64_t)get_map_nentries(map));
+}
+
+static void
+kdebug_trace_dyld_internal(uint32_t base_code,
+ struct dyld_kernel_image_info *info)
+{
+ static_assert(sizeof(info->uuid) >= 16);
+
+#if defined(__LP64__)
+ uint64_t *uuid = (uint64_t *)&(info->uuid);
+
+ KERNEL_DEBUG_CONSTANT_IST(KDEBUG_TRACE,
+ KDBG_EVENTID(DBG_DYLD, DBG_DYLD_UUID, base_code), uuid[0],
+ uuid[1], info->load_addr,
+ (uint64_t)info->fsid.val[0] | ((uint64_t)info->fsid.val[1] << 32),
+ 0);
+ KERNEL_DEBUG_CONSTANT_IST(KDEBUG_TRACE,
+ KDBG_EVENTID(DBG_DYLD, DBG_DYLD_UUID, base_code + 1),
+ (uint64_t)info->fsobjid.fid_objno |
+ ((uint64_t)info->fsobjid.fid_generation << 32),
+ 0, 0, 0, 0);
+#else /* defined(__LP64__) */
+ uint32_t *uuid = (uint32_t *)&(info->uuid);
+
+ KERNEL_DEBUG_CONSTANT_IST(KDEBUG_TRACE,
+ KDBG_EVENTID(DBG_DYLD, DBG_DYLD_UUID, base_code + 2), uuid[0],
+ uuid[1], uuid[2], uuid[3], 0);
+ KERNEL_DEBUG_CONSTANT_IST(KDEBUG_TRACE,
+ KDBG_EVENTID(DBG_DYLD, DBG_DYLD_UUID, base_code + 3),
+ (uint32_t)info->load_addr, info->fsid.val[0], info->fsid.val[1],
+ info->fsobjid.fid_objno, 0);
+ KERNEL_DEBUG_CONSTANT_IST(KDEBUG_TRACE,
+ KDBG_EVENTID(DBG_DYLD, DBG_DYLD_UUID, base_code + 4),
+ info->fsobjid.fid_generation, 0, 0, 0, 0);
+#endif /* !defined(__LP64__) */
+}
+
+static kern_return_t
+kdebug_trace_dyld(task_t task, uint32_t base_code,
+ vm_map_copy_t infos_copy, mach_msg_type_number_t infos_len)
+{
+ kern_return_t kr;
+ dyld_kernel_image_info_array_t infos;
+ vm_map_offset_t map_data;
+ vm_offset_t data;
+
+ assert(infos_copy != NULL);
+
+ if (task == NULL || task != current_task()) {
+ return KERN_INVALID_TASK;
+ }
+
+ kr = vm_map_copyout(ipc_kernel_map, &map_data, (vm_map_copy_t)infos_copy);
+ if (kr != KERN_SUCCESS) {
+ return kr;
+ }
+
+ infos = CAST_DOWN(dyld_kernel_image_info_array_t, map_data);
+
+ for (mach_msg_type_number_t i = 0; i < infos_len; i++) {
+ kdebug_trace_dyld_internal(base_code, &(infos[i]));
+ }
+
+ data = CAST_DOWN(vm_offset_t, map_data);
+ mach_vm_deallocate(ipc_kernel_map, data, infos_len * sizeof(infos[0]));
+ return KERN_SUCCESS;
+}
+
+kern_return_t
+task_register_dyld_image_infos(task_t task,
+ dyld_kernel_image_info_array_t infos_copy,
+ mach_msg_type_number_t infos_len)
+{
+ return kdebug_trace_dyld(task, DBG_DYLD_UUID_MAP_A,
+ (vm_map_copy_t)infos_copy, infos_len);
+}
+
+kern_return_t
+task_unregister_dyld_image_infos(task_t task,
+ dyld_kernel_image_info_array_t infos_copy,
+ mach_msg_type_number_t infos_len)
+{
+ return kdebug_trace_dyld(task, DBG_DYLD_UUID_UNMAP_A,
+ (vm_map_copy_t)infos_copy, infos_len);
+}
+
+kern_return_t
+task_get_dyld_image_infos(__unused task_t task,
+ __unused dyld_kernel_image_info_array_t * dyld_images,
+ __unused mach_msg_type_number_t * dyld_imagesCnt)
+{
+ return KERN_NOT_SUPPORTED;
+}
+
+kern_return_t
+task_register_dyld_shared_cache_image_info(task_t task,
+ dyld_kernel_image_info_t cache_img,
+ __unused boolean_t no_cache,
+ __unused boolean_t private_cache)
+{
+ if (task == NULL || task != current_task()) {
+ return KERN_INVALID_TASK;
+ }
+
+ kdebug_trace_dyld_internal(DBG_DYLD_UUID_SHARED_CACHE_A, &cache_img);
+ return KERN_SUCCESS;
+}
+
+kern_return_t
+task_register_dyld_set_dyld_state(__unused task_t task,
+ __unused uint8_t dyld_state)
+{
+ return KERN_NOT_SUPPORTED;
+}
+
+kern_return_t
+task_register_dyld_get_process_state(__unused task_t task,
+ __unused dyld_kernel_process_info_t * dyld_process_state)
+{
+ return KERN_NOT_SUPPORTED;
+}
+
+#if CONFIG_SECLUDED_MEMORY
+int num_tasks_can_use_secluded_mem = 0;
+
+void
+task_set_can_use_secluded_mem(
+ task_t task,
+ boolean_t can_use_secluded_mem)
+{
+ if (!task->task_could_use_secluded_mem) {
+ return;
+ }
+ task_lock(task);
+ task_set_can_use_secluded_mem_locked(task, can_use_secluded_mem);
+ task_unlock(task);
+}
+
+void
+task_set_can_use_secluded_mem_locked(
+ task_t task,
+ boolean_t can_use_secluded_mem)
+{
+ assert(task->task_could_use_secluded_mem);
+ if (can_use_secluded_mem &&
+ secluded_for_apps && /* global boot-arg */
+ !task->task_can_use_secluded_mem) {
+ assert(num_tasks_can_use_secluded_mem >= 0);
+ OSAddAtomic(+1,
+ (volatile SInt32 *)&num_tasks_can_use_secluded_mem);
+ task->task_can_use_secluded_mem = TRUE;
+ } else if (!can_use_secluded_mem &&
+ task->task_can_use_secluded_mem) {
+ assert(num_tasks_can_use_secluded_mem > 0);
+ OSAddAtomic(-1,
+ (volatile SInt32 *)&num_tasks_can_use_secluded_mem);
+ task->task_can_use_secluded_mem = FALSE;
+ }
+}
+
+void
+task_set_could_use_secluded_mem(
+ task_t task,
+ boolean_t could_use_secluded_mem)
+{
+ task->task_could_use_secluded_mem = could_use_secluded_mem;
+}
+
+void
+task_set_could_also_use_secluded_mem(
+ task_t task,
+ boolean_t could_also_use_secluded_mem)
+{
+ task->task_could_also_use_secluded_mem = could_also_use_secluded_mem;
+}
+
+boolean_t
+task_can_use_secluded_mem(
+ task_t task)
+{
+ if (task->task_can_use_secluded_mem) {
+ assert(task->task_could_use_secluded_mem);
+ assert(num_tasks_can_use_secluded_mem > 0);
+ return TRUE;
+ }
+ if (task->task_could_also_use_secluded_mem &&
+ num_tasks_can_use_secluded_mem > 0) {
+ assert(num_tasks_can_use_secluded_mem > 0);
+ return TRUE;
+ }
+ return FALSE;
+}
+
+boolean_t
+task_could_use_secluded_mem(
+ task_t task)
+{
+ return task->task_could_use_secluded_mem;
+}
+#endif /* CONFIG_SECLUDED_MEMORY */
+
+queue_head_t *
+task_io_user_clients(task_t task)
+{
+ return (&task->io_user_clients);
+}
projects / apple / xnu.git / blobdiff