/*
- * Copyright (c) 2000-2011 Apple Inc. All rights reserved.
+ * Copyright (c) 2000-2016 Apple Inc. All rights reserved.
*
* @APPLE_OSREFERENCE_LICENSE_HEADER_START@
- *
+ *
* This file contains Original Code and/or Modifications of Original Code
* as defined in and that are subject to the Apple Public Source License
* Version 2.0 (the 'License'). You may not use this file except in
* unlawful or unlicensed copies of an Apple operating system, or to
* circumvent, violate, or enable the circumvention or violation of, any
* terms of an Apple operating system software license agreement.
- *
+ *
* Please obtain a copy of the License at
* http://www.opensource.apple.com/apsl/ and read it before using this file.
- *
+ *
* The Original Code and all software distributed under the License are
* distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
* EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
* FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
* Please see the License for the specific language governing rights and
* limitations under the License.
- *
+ *
* @APPLE_OSREFERENCE_LICENSE_HEADER_END@
*/
/* Copyright (c) 1995, 1997 Apple Computer, Inc. All Rights Reserved */
* is included in support of clause 2.2 (b) of the Apple Public License,
* Version 2.0.
*/
-
+
#include <machine/reg.h>
#include <machine/psl.h>
+#include <stdatomic.h>
#include "compat_43.h"
#include <sys/malloc.h>
#include <sys/resourcevar.h>
#include <sys/ptrace.h>
+#include <sys/proc_info.h>
+#include <sys/reason.h>
+#include <sys/_types/_timeval64.h>
#include <sys/user.h>
#include <sys/aio_kern.h>
#include <sys/sysproto.h>
#include <sys/signalvar.h>
#include <sys/kdebug.h>
-#include <sys/filedesc.h> /* fdfree */
-#if SYSV_SHM
-#include <sys/shm_internal.h> /* shmexit */
-#endif
-#include <sys/acct.h> /* acct_process */
+#include <sys/filedesc.h> /* fdfree */
+#include <sys/acct.h> /* acct_process */
+#include <sys/codesign.h>
+#include <sys/event.h> /* kevent_proc_copy_uptrs */
+#include <sys/sdt.h>
#include <security/audit/audit.h>
#include <bsm/audit_kevents.h>
#include <mach/mach_types.h>
+#include <mach/task.h>
+#include <mach/thread_act.h>
+#include <kern/exc_resource.h>
#include <kern/kern_types.h>
#include <kern/kalloc.h>
#include <kern/task.h>
+#include <corpses/task_corpse.h>
#include <kern/thread.h>
#include <kern/thread_call.h>
#include <kern/sched_prim.h>
#include <kern/assert.h>
-#include <sys/codesign.h>
+#include <kern/policy_internal.h>
+#include <kern/exc_guard.h>
-#if VM_PRESSURE_EVENTS
-#include <kern/vm_pressure.h>
-#endif
+#include <vm/vm_protos.h>
+#include <os/log.h>
+#include <pexpert/pexpert.h>
+
+#if SYSV_SHM
+#include <sys/shm_internal.h> /* shmexit */
+#endif /* SYSV_SHM */
+#if CONFIG_PERSONAS
+#include <sys/persona.h>
+#endif /* CONFIG_PERSONAS */
#if CONFIG_MEMORYSTATUS
#include <sys/kern_memorystatus.h>
-#endif
-
+#endif /* CONFIG_MEMORYSTATUS */
#if CONFIG_DTRACE
/* Do not include dtrace.h, it redefines kmem_[alloc/free] */
-extern void (*dtrace_fasttrap_exit_ptr)(proc_t);
-extern void (*dtrace_helpers_cleanup)(proc_t);
-extern void dtrace_lazy_dofs_destroy(proc_t);
-
+void dtrace_proc_exit(proc_t p);
#include <sys/dtrace_ptss.h>
-#endif
-
+#endif /* CONFIG_DTRACE */
#if CONFIG_MACF
-#include <security/mac.h>
+#include <security/mac_framework.h>
+#include <security/mac_mach_internal.h>
#include <sys/syscall.h>
-#endif
+#endif /* CONFIG_MACF */
-#include <mach/mach_types.h>
-#include <mach/task.h>
-#include <mach/thread_act.h>
-
-#include <vm/vm_protos.h>
-
-#include <sys/sdt.h>
-
-extern boolean_t init_task_died;
-extern char init_task_failure_data[];
+#if CONFIG_MEMORYSTATUS
+static void proc_memorystatus_remove(proc_t p);
+#endif /* CONFIG_MEMORYSTATUS */
void proc_prepareexit(proc_t p, int rv, boolean_t perf_notify);
+void gather_populate_corpse_crashinfo(proc_t p, task_t corpse_task,
+ mach_exception_data_type_t code, mach_exception_data_type_t subcode,
+ uint64_t *udata_buffer, int num_udata, void *reason);
+mach_exception_data_type_t proc_encode_exit_exception_code(proc_t p);
void vfork_exit(proc_t p, int rv);
-void vproc_exit(proc_t p);
__private_extern__ void munge_user64_rusage(struct rusage *a_rusage_p, struct user64_rusage *a_user_rusage_p);
__private_extern__ void munge_user32_rusage(struct rusage *a_rusage_p, struct user32_rusage *a_user_rusage_p);
static int reap_child_locked(proc_t parent, proc_t child, int deadparent, int reparentedtoinit, int locked, int droplock);
+static void populate_corpse_crashinfo(proc_t p, task_t corpse_task,
+ struct rusage_superset *rup, mach_exception_data_type_t code,
+ mach_exception_data_type_t subcode, uint64_t *udata_buffer,
+ int num_udata, os_reason_t reason);
+static void proc_update_corpse_exception_codes(proc_t p, mach_exception_data_type_t *code, mach_exception_data_type_t *subcode);
+extern int proc_pidpathinfo_internal(proc_t p, uint64_t arg, char *buffer, uint32_t buffersize, int32_t *retval);
+static __attribute__((noinline)) void launchd_crashed_panic(proc_t p, int rv);
+extern void proc_piduniqidentifierinfo(proc_t p, struct proc_uniqidentifierinfo *p_uniqidinfo);
+extern void task_coalition_ids(task_t task, uint64_t ids[COALITION_NUM_TYPES]);
+extern uint64_t get_task_phys_footprint_limit(task_t);
+int proc_list_uptrs(void *p, uint64_t *udata_buffer, int size);
+extern uint64_t task_corpse_get_crashed_thread_id(task_t corpse_task);
+
+ZONE_DECLARE(zombie_zone, "zombie",
+ sizeof(struct rusage_superset), ZC_NOENCRYPT);
+
/*
* Things which should have prototypes in headers, but don't
*/
-void proc_exit(proc_t p);
-int wait1continue(int result);
-int waitidcontinue(int result);
+void proc_exit(proc_t p);
+int wait1continue(int result);
+int waitidcontinue(int result);
kern_return_t sys_perf_notify(thread_t thread, int pid);
kern_return_t task_exception_notify(exception_type_t exception,
- mach_exception_data_type_t code, mach_exception_data_type_t subcode);
-void delay(int);
+ mach_exception_data_type_t code, mach_exception_data_type_t subcode);
+kern_return_t task_violated_guard(mach_exception_code_t, mach_exception_subcode_t, void *);
+void delay(int);
void gather_rusage_info(proc_t p, rusage_info_current *ru, int flavor);
+#if __has_feature(ptrauth_calls)
+int exit_with_pac_exception(proc_t p, exception_type_t exception, mach_exception_code_t code,
+ mach_exception_subcode_t subcode);
+#endif /* __has_feature(ptrauth_calls) */
+
+
/*
* NOTE: Source and target may *NOT* overlap!
* XXX Should share code with bsd/dev/ppc/unix_signal.c
void
siginfo_user_to_user32(user_siginfo_t *in, user32_siginfo_t *out)
{
- out->si_signo = in->si_signo;
- out->si_errno = in->si_errno;
- out->si_code = in->si_code;
- out->si_pid = in->si_pid;
- out->si_uid = in->si_uid;
- out->si_status = in->si_status;
- out->si_addr = CAST_DOWN_EXPLICIT(user32_addr_t,in->si_addr);
+ out->si_signo = in->si_signo;
+ out->si_errno = in->si_errno;
+ out->si_code = in->si_code;
+ out->si_pid = in->si_pid;
+ out->si_uid = in->si_uid;
+ out->si_status = in->si_status;
+ out->si_addr = CAST_DOWN_EXPLICIT(user32_addr_t, in->si_addr);
/* following cast works for sival_int because of padding */
- out->si_value.sival_ptr = CAST_DOWN_EXPLICIT(user32_addr_t,in->si_value.sival_ptr);
- out->si_band = in->si_band; /* range reduction */
+ out->si_value.sival_ptr = CAST_DOWN_EXPLICIT(user32_addr_t, in->si_value.sival_ptr);
+ out->si_band = (user32_long_t)in->si_band; /* range reduction */
}
void
siginfo_user_to_user64(user_siginfo_t *in, user64_siginfo_t *out)
{
- out->si_signo = in->si_signo;
- out->si_errno = in->si_errno;
- out->si_code = in->si_code;
- out->si_pid = in->si_pid;
- out->si_uid = in->si_uid;
- out->si_status = in->si_status;
- out->si_addr = in->si_addr;
+ out->si_signo = in->si_signo;
+ out->si_errno = in->si_errno;
+ out->si_code = in->si_code;
+ out->si_pid = in->si_pid;
+ out->si_uid = in->si_uid;
+ out->si_status = in->si_status;
+ out->si_addr = in->si_addr;
/* following cast works for sival_int because of padding */
- out->si_value.sival_ptr = in->si_value.sival_ptr;
- out->si_band = in->si_band; /* range reduction */
+ out->si_value.sival_ptr = in->si_value.sival_ptr;
+ out->si_band = in->si_band; /* range reduction */
}
static int
{
if (is64) {
user64_siginfo_t sinfo64;
-
- bzero(&sinfo64, sizeof (sinfo64));
+
+ bzero(&sinfo64, sizeof(sinfo64));
siginfo_user_to_user64(native, &sinfo64);
- return (copyout(&sinfo64, uaddr, sizeof (sinfo64)));
+ return copyout(&sinfo64, uaddr, sizeof(sinfo64));
} else {
user32_siginfo_t sinfo32;
- bzero(&sinfo32, sizeof (sinfo32));
+ bzero(&sinfo32, sizeof(sinfo32));
siginfo_user_to_user32(native, &sinfo32);
- return (copyout(&sinfo32, uaddr, sizeof (sinfo32)));
+ return copyout(&sinfo32, uaddr, sizeof(sinfo32));
+ }
+}
+
+void
+gather_populate_corpse_crashinfo(proc_t p, task_t corpse_task,
+ mach_exception_data_type_t code, mach_exception_data_type_t subcode,
+ uint64_t *udata_buffer, int num_udata, void *reason)
+{
+ struct rusage_superset rup;
+
+ gather_rusage_info(p, &rup.ri, RUSAGE_INFO_CURRENT);
+ rup.ri.ri_phys_footprint = 0;
+ populate_corpse_crashinfo(p, corpse_task, &rup, code, subcode,
+ udata_buffer, num_udata, reason);
+}
+
+static void
+proc_update_corpse_exception_codes(proc_t p, mach_exception_data_type_t *code, mach_exception_data_type_t *subcode)
+{
+ mach_exception_data_type_t code_update = *code;
+ mach_exception_data_type_t subcode_update = *subcode;
+ if (p->p_exit_reason == OS_REASON_NULL) {
+ return;
+ }
+
+ switch (p->p_exit_reason->osr_namespace) {
+ case OS_REASON_JETSAM:
+ if (p->p_exit_reason->osr_code == JETSAM_REASON_MEMORY_PERPROCESSLIMIT) {
+ /* Update the code with EXC_RESOURCE code for high memory watermark */
+ EXC_RESOURCE_ENCODE_TYPE(code_update, RESOURCE_TYPE_MEMORY);
+ EXC_RESOURCE_ENCODE_FLAVOR(code_update, FLAVOR_HIGH_WATERMARK);
+ EXC_RESOURCE_HWM_ENCODE_LIMIT(code_update, ((get_task_phys_footprint_limit(p->task)) >> 20));
+ subcode_update = 0;
+ break;
+ }
+
+ break;
+ default:
+ break;
+ }
+
+ *code = code_update;
+ *subcode = subcode_update;
+ return;
+}
+
+mach_exception_data_type_t
+proc_encode_exit_exception_code(proc_t p)
+{
+ uint64_t subcode = 0;
+
+ if (p->p_exit_reason == OS_REASON_NULL) {
+ return 0;
+ }
+
+ /* Embed first 32 bits of osr_namespace and osr_code in exception code */
+ ENCODE_OSR_NAMESPACE_TO_MACH_EXCEPTION_CODE(subcode, p->p_exit_reason->osr_namespace);
+ ENCODE_OSR_CODE_TO_MACH_EXCEPTION_CODE(subcode, p->p_exit_reason->osr_code);
+ return (mach_exception_data_type_t)subcode;
+}
+
+static void
+populate_corpse_crashinfo(proc_t p, task_t corpse_task, struct rusage_superset *rup,
+ mach_exception_data_type_t code, mach_exception_data_type_t subcode,
+ uint64_t *udata_buffer, int num_udata, os_reason_t reason)
+{
+ mach_vm_address_t uaddr = 0;
+ mach_exception_data_type_t exc_codes[EXCEPTION_CODE_MAX];
+ exc_codes[0] = code;
+ exc_codes[1] = subcode;
+ cpu_type_t cputype;
+ struct proc_uniqidentifierinfo p_uniqidinfo;
+ struct proc_workqueueinfo pwqinfo;
+ int retval = 0;
+ uint64_t crashed_threadid = task_corpse_get_crashed_thread_id(corpse_task);
+ unsigned int pflags = 0;
+ uint64_t max_footprint_mb;
+ uint64_t max_footprint;
+
+ uint64_t ledger_internal;
+ uint64_t ledger_internal_compressed;
+ uint64_t ledger_iokit_mapped;
+ uint64_t ledger_alternate_accounting;
+ uint64_t ledger_alternate_accounting_compressed;
+ uint64_t ledger_purgeable_nonvolatile;
+ uint64_t ledger_purgeable_nonvolatile_compressed;
+ uint64_t ledger_page_table;
+ uint64_t ledger_phys_footprint;
+ uint64_t ledger_phys_footprint_lifetime_max;
+ uint64_t ledger_network_nonvolatile;
+ uint64_t ledger_network_nonvolatile_compressed;
+ uint64_t ledger_wired_mem;
+ uint64_t ledger_tagged_footprint;
+ uint64_t ledger_tagged_footprint_compressed;
+ uint64_t ledger_media_footprint;
+ uint64_t ledger_media_footprint_compressed;
+ uint64_t ledger_graphics_footprint;
+ uint64_t ledger_graphics_footprint_compressed;
+ uint64_t ledger_neural_footprint;
+ uint64_t ledger_neural_footprint_compressed;
+
+ void *crash_info_ptr = task_get_corpseinfo(corpse_task);
+
+#if CONFIG_MEMORYSTATUS
+ int memstat_dirty_flags = 0;
+#endif
+
+ if (KERN_SUCCESS == kcdata_get_memory_addr(crash_info_ptr, TASK_CRASHINFO_EXCEPTION_CODES, sizeof(exc_codes), &uaddr)) {
+ kcdata_memcpy(crash_info_ptr, uaddr, exc_codes, sizeof(exc_codes));
+ }
+
+ if (KERN_SUCCESS == kcdata_get_memory_addr(crash_info_ptr, TASK_CRASHINFO_PID, sizeof(p->p_pid), &uaddr)) {
+ kcdata_memcpy(crash_info_ptr, uaddr, &p->p_pid, sizeof(p->p_pid));
+ }
+
+ if (KERN_SUCCESS == kcdata_get_memory_addr(crash_info_ptr, TASK_CRASHINFO_PPID, sizeof(p->p_ppid), &uaddr)) {
+ kcdata_memcpy(crash_info_ptr, uaddr, &p->p_ppid, sizeof(p->p_ppid));
+ }
+
+ /* Don't include the crashed thread ID if there's an exit reason that indicates it's irrelevant */
+ if ((p->p_exit_reason == OS_REASON_NULL) || !(p->p_exit_reason->osr_flags & OS_REASON_FLAG_NO_CRASHED_TID)) {
+ if (KERN_SUCCESS == kcdata_get_memory_addr(crash_info_ptr, TASK_CRASHINFO_CRASHED_THREADID, sizeof(uint64_t), &uaddr)) {
+ kcdata_memcpy(crash_info_ptr, uaddr, &crashed_threadid, sizeof(uint64_t));
+ }
+ }
+
+ static_assert(sizeof(struct proc_uniqidentifierinfo) == sizeof(struct crashinfo_proc_uniqidentifierinfo));
+ if (KERN_SUCCESS ==
+ kcdata_get_memory_addr(crash_info_ptr, TASK_CRASHINFO_BSDINFOWITHUNIQID, sizeof(struct proc_uniqidentifierinfo), &uaddr)) {
+ proc_piduniqidentifierinfo(p, &p_uniqidinfo);
+ kcdata_memcpy(crash_info_ptr, uaddr, &p_uniqidinfo, sizeof(struct proc_uniqidentifierinfo));
+ }
+
+ if (KERN_SUCCESS == kcdata_get_memory_addr(crash_info_ptr, TASK_CRASHINFO_RUSAGE_INFO, sizeof(rusage_info_current), &uaddr)) {
+ kcdata_memcpy(crash_info_ptr, uaddr, &rup->ri, sizeof(rusage_info_current));
+ }
+
+ if (KERN_SUCCESS == kcdata_get_memory_addr(crash_info_ptr, TASK_CRASHINFO_PROC_CSFLAGS, sizeof(p->p_csflags), &uaddr)) {
+ kcdata_memcpy(crash_info_ptr, uaddr, &p->p_csflags, sizeof(p->p_csflags));
+ }
+
+ if (KERN_SUCCESS == kcdata_get_memory_addr(crash_info_ptr, TASK_CRASHINFO_PROC_NAME, sizeof(p->p_comm), &uaddr)) {
+ kcdata_memcpy(crash_info_ptr, uaddr, &p->p_comm, sizeof(p->p_comm));
+ }
+
+ if (KERN_SUCCESS == kcdata_get_memory_addr(crash_info_ptr, TASK_CRASHINFO_PROC_STARTTIME, sizeof(p->p_start), &uaddr)) {
+ struct timeval64 t64;
+ t64.tv_sec = (int64_t)p->p_start.tv_sec;
+ t64.tv_usec = (int64_t)p->p_start.tv_usec;
+ kcdata_memcpy(crash_info_ptr, uaddr, &t64, sizeof(t64));
+ }
+
+ if (KERN_SUCCESS == kcdata_get_memory_addr(crash_info_ptr, TASK_CRASHINFO_USERSTACK, sizeof(p->user_stack), &uaddr)) {
+ kcdata_memcpy(crash_info_ptr, uaddr, &p->user_stack, sizeof(p->user_stack));
+ }
+
+ if (KERN_SUCCESS == kcdata_get_memory_addr(crash_info_ptr, TASK_CRASHINFO_ARGSLEN, sizeof(p->p_argslen), &uaddr)) {
+ kcdata_memcpy(crash_info_ptr, uaddr, &p->p_argslen, sizeof(p->p_argslen));
+ }
+
+ if (KERN_SUCCESS == kcdata_get_memory_addr(crash_info_ptr, TASK_CRASHINFO_PROC_ARGC, sizeof(p->p_argc), &uaddr)) {
+ kcdata_memcpy(crash_info_ptr, uaddr, &p->p_argc, sizeof(p->p_argc));
+ }
+
+ if (KERN_SUCCESS == kcdata_get_memory_addr(crash_info_ptr, TASK_CRASHINFO_PROC_PATH, MAXPATHLEN, &uaddr)) {
+ char *buf = zalloc_flags(ZV_NAMEI, Z_WAITOK | Z_ZERO);
+ proc_pidpathinfo_internal(p, 0, buf, MAXPATHLEN, &retval);
+ kcdata_memcpy(crash_info_ptr, uaddr, buf, MAXPATHLEN);
+ zfree(ZV_NAMEI, buf);
+ }
+
+ pflags = p->p_flag & (P_LP64 | P_SUGID | P_TRANSLATED);
+ if (KERN_SUCCESS == kcdata_get_memory_addr(crash_info_ptr, TASK_CRASHINFO_PROC_FLAGS, sizeof(pflags), &uaddr)) {
+ kcdata_memcpy(crash_info_ptr, uaddr, &pflags, sizeof(pflags));
+ }
+
+ if (KERN_SUCCESS == kcdata_get_memory_addr(crash_info_ptr, TASK_CRASHINFO_UID, sizeof(p->p_uid), &uaddr)) {
+ kcdata_memcpy(crash_info_ptr, uaddr, &p->p_uid, sizeof(p->p_uid));
+ }
+
+ if (KERN_SUCCESS == kcdata_get_memory_addr(crash_info_ptr, TASK_CRASHINFO_GID, sizeof(p->p_gid), &uaddr)) {
+ kcdata_memcpy(crash_info_ptr, uaddr, &p->p_gid, sizeof(p->p_gid));
+ }
+
+ cputype = cpu_type() & ~CPU_ARCH_MASK;
+ if (IS_64BIT_PROCESS(p)) {
+ cputype |= CPU_ARCH_ABI64;
+ }
+
+ if (KERN_SUCCESS == kcdata_get_memory_addr(crash_info_ptr, TASK_CRASHINFO_CPUTYPE, sizeof(cpu_type_t), &uaddr)) {
+ kcdata_memcpy(crash_info_ptr, uaddr, &cputype, sizeof(cpu_type_t));
+ }
+
+ if (KERN_SUCCESS == kcdata_get_memory_addr(crash_info_ptr, TASK_CRASHINFO_MEMORY_LIMIT, sizeof(max_footprint_mb), &uaddr)) {
+ max_footprint = get_task_phys_footprint_limit(p->task);
+ max_footprint_mb = max_footprint >> 20;
+ kcdata_memcpy(crash_info_ptr, uaddr, &max_footprint_mb, sizeof(max_footprint_mb));
+ }
+
+ if (KERN_SUCCESS == kcdata_get_memory_addr(crash_info_ptr, TASK_CRASHINFO_LEDGER_PHYS_FOOTPRINT_LIFETIME_MAX, sizeof(ledger_phys_footprint_lifetime_max), &uaddr)) {
+ ledger_phys_footprint_lifetime_max = get_task_phys_footprint_lifetime_max(p->task);
+ kcdata_memcpy(crash_info_ptr, uaddr, &ledger_phys_footprint_lifetime_max, sizeof(ledger_phys_footprint_lifetime_max));
+ }
+
+ // In the forking case, the current ledger info is copied into the corpse while the original task is suspended for consistency
+ if (KERN_SUCCESS == kcdata_get_memory_addr(crash_info_ptr, TASK_CRASHINFO_LEDGER_INTERNAL, sizeof(ledger_internal), &uaddr)) {
+ ledger_internal = get_task_internal(corpse_task);
+ kcdata_memcpy(crash_info_ptr, uaddr, &ledger_internal, sizeof(ledger_internal));
+ }
+
+ if (KERN_SUCCESS == kcdata_get_memory_addr(crash_info_ptr, TASK_CRASHINFO_LEDGER_INTERNAL_COMPRESSED, sizeof(ledger_internal_compressed), &uaddr)) {
+ ledger_internal_compressed = get_task_internal_compressed(corpse_task);
+ kcdata_memcpy(crash_info_ptr, uaddr, &ledger_internal_compressed, sizeof(ledger_internal_compressed));
+ }
+
+ if (KERN_SUCCESS == kcdata_get_memory_addr(crash_info_ptr, TASK_CRASHINFO_LEDGER_IOKIT_MAPPED, sizeof(ledger_iokit_mapped), &uaddr)) {
+ ledger_iokit_mapped = get_task_iokit_mapped(corpse_task);
+ kcdata_memcpy(crash_info_ptr, uaddr, &ledger_iokit_mapped, sizeof(ledger_iokit_mapped));
+ }
+
+ if (KERN_SUCCESS == kcdata_get_memory_addr(crash_info_ptr, TASK_CRASHINFO_LEDGER_ALTERNATE_ACCOUNTING, sizeof(ledger_alternate_accounting), &uaddr)) {
+ ledger_alternate_accounting = get_task_alternate_accounting(corpse_task);
+ kcdata_memcpy(crash_info_ptr, uaddr, &ledger_alternate_accounting, sizeof(ledger_alternate_accounting));
+ }
+
+ if (KERN_SUCCESS == kcdata_get_memory_addr(crash_info_ptr, TASK_CRASHINFO_LEDGER_ALTERNATE_ACCOUNTING_COMPRESSED, sizeof(ledger_alternate_accounting_compressed), &uaddr)) {
+ ledger_alternate_accounting_compressed = get_task_alternate_accounting_compressed(corpse_task);
+ kcdata_memcpy(crash_info_ptr, uaddr, &ledger_alternate_accounting_compressed, sizeof(ledger_alternate_accounting_compressed));
+ }
+
+ if (KERN_SUCCESS == kcdata_get_memory_addr(crash_info_ptr, TASK_CRASHINFO_LEDGER_PURGEABLE_NONVOLATILE, sizeof(ledger_purgeable_nonvolatile), &uaddr)) {
+ ledger_purgeable_nonvolatile = get_task_purgeable_nonvolatile(corpse_task);
+ kcdata_memcpy(crash_info_ptr, uaddr, &ledger_purgeable_nonvolatile, sizeof(ledger_purgeable_nonvolatile));
+ }
+
+ if (KERN_SUCCESS == kcdata_get_memory_addr(crash_info_ptr, TASK_CRASHINFO_LEDGER_PURGEABLE_NONVOLATILE_COMPRESSED, sizeof(ledger_purgeable_nonvolatile_compressed), &uaddr)) {
+ ledger_purgeable_nonvolatile_compressed = get_task_purgeable_nonvolatile_compressed(corpse_task);
+ kcdata_memcpy(crash_info_ptr, uaddr, &ledger_purgeable_nonvolatile_compressed, sizeof(ledger_purgeable_nonvolatile_compressed));
+ }
+
+ if (KERN_SUCCESS == kcdata_get_memory_addr(crash_info_ptr, TASK_CRASHINFO_LEDGER_PAGE_TABLE, sizeof(ledger_page_table), &uaddr)) {
+ ledger_page_table = get_task_page_table(corpse_task);
+ kcdata_memcpy(crash_info_ptr, uaddr, &ledger_page_table, sizeof(ledger_page_table));
+ }
+
+ if (KERN_SUCCESS == kcdata_get_memory_addr(crash_info_ptr, TASK_CRASHINFO_LEDGER_PHYS_FOOTPRINT, sizeof(ledger_phys_footprint), &uaddr)) {
+ ledger_phys_footprint = get_task_phys_footprint(corpse_task);
+ kcdata_memcpy(crash_info_ptr, uaddr, &ledger_phys_footprint, sizeof(ledger_phys_footprint));
+ }
+
+ if (KERN_SUCCESS == kcdata_get_memory_addr(crash_info_ptr, TASK_CRASHINFO_LEDGER_NETWORK_NONVOLATILE, sizeof(ledger_network_nonvolatile), &uaddr)) {
+ ledger_network_nonvolatile = get_task_network_nonvolatile(corpse_task);
+ kcdata_memcpy(crash_info_ptr, uaddr, &ledger_network_nonvolatile, sizeof(ledger_network_nonvolatile));
+ }
+
+ if (KERN_SUCCESS == kcdata_get_memory_addr(crash_info_ptr, TASK_CRASHINFO_LEDGER_NETWORK_NONVOLATILE_COMPRESSED, sizeof(ledger_network_nonvolatile_compressed), &uaddr)) {
+ ledger_network_nonvolatile_compressed = get_task_network_nonvolatile_compressed(corpse_task);
+ kcdata_memcpy(crash_info_ptr, uaddr, &ledger_network_nonvolatile_compressed, sizeof(ledger_network_nonvolatile_compressed));
+ }
+
+ if (KERN_SUCCESS == kcdata_get_memory_addr(crash_info_ptr, TASK_CRASHINFO_LEDGER_WIRED_MEM, sizeof(ledger_wired_mem), &uaddr)) {
+ ledger_wired_mem = get_task_wired_mem(corpse_task);
+ kcdata_memcpy(crash_info_ptr, uaddr, &ledger_wired_mem, sizeof(ledger_wired_mem));
+ }
+
+ bzero(&pwqinfo, sizeof(struct proc_workqueueinfo));
+ retval = fill_procworkqueue(p, &pwqinfo);
+ if (retval == 0) {
+ if (KERN_SUCCESS == kcdata_get_memory_addr(crash_info_ptr, TASK_CRASHINFO_WORKQUEUEINFO, sizeof(struct proc_workqueueinfo), &uaddr)) {
+ kcdata_memcpy(crash_info_ptr, uaddr, &pwqinfo, sizeof(struct proc_workqueueinfo));
+ }
+ }
+
+ if (KERN_SUCCESS == kcdata_get_memory_addr(crash_info_ptr, TASK_CRASHINFO_RESPONSIBLE_PID, sizeof(p->p_responsible_pid), &uaddr)) {
+ kcdata_memcpy(crash_info_ptr, uaddr, &p->p_responsible_pid, sizeof(p->p_responsible_pid));
+ }
+
+ if (KERN_SUCCESS == kcdata_get_memory_addr(crash_info_ptr, TASK_CRASHINFO_PROC_PERSONA_ID, sizeof(uid_t), &uaddr)) {
+ uid_t persona_id = proc_persona_id(p);
+ kcdata_memcpy(crash_info_ptr, uaddr, &persona_id, sizeof(persona_id));
+ }
+
+#if CONFIG_COALITIONS
+ if (KERN_SUCCESS == kcdata_get_memory_addr_for_array(crash_info_ptr, TASK_CRASHINFO_COALITION_ID, sizeof(uint64_t), COALITION_NUM_TYPES, &uaddr)) {
+ uint64_t coalition_ids[COALITION_NUM_TYPES];
+ task_coalition_ids(p->task, coalition_ids);
+ kcdata_memcpy(crash_info_ptr, uaddr, coalition_ids, sizeof(coalition_ids));
+ }
+#endif /* CONFIG_COALITIONS */
+
+#if CONFIG_MEMORYSTATUS
+ memstat_dirty_flags = memorystatus_dirty_get(p, FALSE);
+ if (KERN_SUCCESS == kcdata_get_memory_addr(crash_info_ptr, TASK_CRASHINFO_DIRTY_FLAGS, sizeof(memstat_dirty_flags), &uaddr)) {
+ kcdata_memcpy(crash_info_ptr, uaddr, &memstat_dirty_flags, sizeof(memstat_dirty_flags));
+ }
+#endif
+
+ if (KERN_SUCCESS == kcdata_get_memory_addr(crash_info_ptr, TASK_CRASHINFO_MEMORY_LIMIT_INCREASE, sizeof(p->p_memlimit_increase), &uaddr)) {
+ kcdata_memcpy(crash_info_ptr, uaddr, &p->p_memlimit_increase, sizeof(p->p_memlimit_increase));
+ }
+
+ if (KERN_SUCCESS == kcdata_get_memory_addr(crash_info_ptr, TASK_CRASHINFO_LEDGER_TAGGED_FOOTPRINT, sizeof(ledger_tagged_footprint), &uaddr)) {
+ ledger_tagged_footprint = get_task_tagged_footprint(corpse_task);
+ kcdata_memcpy(crash_info_ptr, uaddr, &ledger_tagged_footprint, sizeof(ledger_tagged_footprint));
+ }
+
+ if (KERN_SUCCESS == kcdata_get_memory_addr(crash_info_ptr, TASK_CRASHINFO_LEDGER_TAGGED_FOOTPRINT_COMPRESSED, sizeof(ledger_tagged_footprint_compressed), &uaddr)) {
+ ledger_tagged_footprint_compressed = get_task_tagged_footprint_compressed(corpse_task);
+ kcdata_memcpy(crash_info_ptr, uaddr, &ledger_tagged_footprint_compressed, sizeof(ledger_tagged_footprint_compressed));
+ }
+
+ if (KERN_SUCCESS == kcdata_get_memory_addr(crash_info_ptr, TASK_CRASHINFO_LEDGER_MEDIA_FOOTPRINT, sizeof(ledger_media_footprint), &uaddr)) {
+ ledger_media_footprint = get_task_media_footprint(corpse_task);
+ kcdata_memcpy(crash_info_ptr, uaddr, &ledger_media_footprint, sizeof(ledger_media_footprint));
+ }
+
+ if (KERN_SUCCESS == kcdata_get_memory_addr(crash_info_ptr, TASK_CRASHINFO_LEDGER_MEDIA_FOOTPRINT_COMPRESSED, sizeof(ledger_media_footprint_compressed), &uaddr)) {
+ ledger_media_footprint_compressed = get_task_media_footprint_compressed(corpse_task);
+ kcdata_memcpy(crash_info_ptr, uaddr, &ledger_media_footprint_compressed, sizeof(ledger_media_footprint_compressed));
+ }
+
+ if (KERN_SUCCESS == kcdata_get_memory_addr(crash_info_ptr, TASK_CRASHINFO_LEDGER_GRAPHICS_FOOTPRINT, sizeof(ledger_graphics_footprint), &uaddr)) {
+ ledger_graphics_footprint = get_task_graphics_footprint(corpse_task);
+ kcdata_memcpy(crash_info_ptr, uaddr, &ledger_graphics_footprint, sizeof(ledger_graphics_footprint));
+ }
+
+ if (KERN_SUCCESS == kcdata_get_memory_addr(crash_info_ptr, TASK_CRASHINFO_LEDGER_GRAPHICS_FOOTPRINT_COMPRESSED, sizeof(ledger_graphics_footprint_compressed), &uaddr)) {
+ ledger_graphics_footprint_compressed = get_task_graphics_footprint_compressed(corpse_task);
+ kcdata_memcpy(crash_info_ptr, uaddr, &ledger_graphics_footprint_compressed, sizeof(ledger_graphics_footprint_compressed));
+ }
+
+ if (KERN_SUCCESS == kcdata_get_memory_addr(crash_info_ptr, TASK_CRASHINFO_LEDGER_NEURAL_FOOTPRINT, sizeof(ledger_neural_footprint), &uaddr)) {
+ ledger_neural_footprint = get_task_neural_footprint(corpse_task);
+ kcdata_memcpy(crash_info_ptr, uaddr, &ledger_neural_footprint, sizeof(ledger_neural_footprint));
+ }
+
+ if (KERN_SUCCESS == kcdata_get_memory_addr(crash_info_ptr, TASK_CRASHINFO_LEDGER_NEURAL_FOOTPRINT_COMPRESSED, sizeof(ledger_neural_footprint_compressed), &uaddr)) {
+ ledger_neural_footprint_compressed = get_task_neural_footprint_compressed(corpse_task);
+ kcdata_memcpy(crash_info_ptr, uaddr, &ledger_neural_footprint_compressed, sizeof(ledger_neural_footprint_compressed));
+ }
+
+ if (KERN_SUCCESS == kcdata_get_memory_addr(crash_info_ptr, TASK_CRASHINFO_MEMORYSTATUS_EFFECTIVE_PRIORITY, sizeof(p->p_memstat_effectivepriority), &uaddr)) {
+ kcdata_memcpy(crash_info_ptr, uaddr, &p->p_memstat_effectivepriority, sizeof(p->p_memstat_effectivepriority));
+ }
+
+ if (p->p_exit_reason != OS_REASON_NULL && reason == OS_REASON_NULL) {
+ reason = p->p_exit_reason;
+ }
+ if (reason != OS_REASON_NULL) {
+ if (KERN_SUCCESS == kcdata_get_memory_addr(crash_info_ptr, EXIT_REASON_SNAPSHOT, sizeof(struct exit_reason_snapshot), &uaddr)) {
+ struct exit_reason_snapshot ers = {
+ .ers_namespace = reason->osr_namespace,
+ .ers_code = reason->osr_code,
+ .ers_flags = reason->osr_flags
+ };
+
+ kcdata_memcpy(crash_info_ptr, uaddr, &ers, sizeof(ers));
+ }
+
+ if (reason->osr_kcd_buf != 0) {
+ uint32_t reason_buf_size = (uint32_t)kcdata_memory_get_used_bytes(&reason->osr_kcd_descriptor);
+ assert(reason_buf_size != 0);
+
+ if (KERN_SUCCESS == kcdata_get_memory_addr(crash_info_ptr, KCDATA_TYPE_NESTED_KCDATA, reason_buf_size, &uaddr)) {
+ kcdata_memcpy(crash_info_ptr, uaddr, reason->osr_kcd_buf, reason_buf_size);
+ }
+ }
+ }
+
+ if (num_udata > 0) {
+ if (KERN_SUCCESS == kcdata_get_memory_addr_for_array(crash_info_ptr, TASK_CRASHINFO_UDATA_PTRS,
+ sizeof(uint64_t), num_udata, &uaddr)) {
+ kcdata_memcpy(crash_info_ptr, uaddr, udata_buffer, sizeof(uint64_t) * num_udata);
+ }
}
}
+/*
+ * We only parse exit reason kcdata blobs for launchd when it dies
+ * and we're going to panic.
+ *
+ * Meant to be called immediately before panicking.
+ */
+char *
+launchd_exit_reason_get_string_desc(os_reason_t exit_reason)
+{
+ kcdata_iter_t iter;
+
+ if (exit_reason == OS_REASON_NULL || exit_reason->osr_kcd_buf == NULL ||
+ exit_reason->osr_bufsize == 0) {
+ return NULL;
+ }
+
+ iter = kcdata_iter(exit_reason->osr_kcd_buf, exit_reason->osr_bufsize);
+ if (!kcdata_iter_valid(iter)) {
+#if DEBUG || DEVELOPMENT
+ printf("launchd exit reason has invalid exit reason buffer\n");
+#endif
+ return NULL;
+ }
+
+ if (kcdata_iter_type(iter) != KCDATA_BUFFER_BEGIN_OS_REASON) {
+#if DEBUG || DEVELOPMENT
+ printf("launchd exit reason buffer type mismatch, expected %d got %d\n",
+ KCDATA_BUFFER_BEGIN_OS_REASON, kcdata_iter_type(iter));
+#endif
+ return NULL;
+ }
+
+ iter = kcdata_iter_find_type(iter, EXIT_REASON_USER_DESC);
+ if (!kcdata_iter_valid(iter)) {
+ return NULL;
+ }
+
+ return (char *)kcdata_iter_payload(iter);
+}
+
+__abortlike
+static void
+launchd_crashed_panic(proc_t p, int rv)
+{
+ char *launchd_exit_reason_desc = launchd_exit_reason_get_string_desc(p->p_exit_reason);
+
+ if (p->p_exit_reason == OS_REASON_NULL) {
+ printf("pid 1 exited -- no exit reason available -- (signal %d, exit %d)\n",
+ WTERMSIG(rv), WEXITSTATUS(rv));
+ } else {
+ printf("pid 1 exited -- exit reason namespace %d subcode 0x%llx, description %s\n",
+ p->p_exit_reason->osr_namespace, p->p_exit_reason->osr_code, launchd_exit_reason_desc ?
+ launchd_exit_reason_desc : "none");
+ }
+
+ const char *launchd_crashed_prefix_str;
+
+ if (strnstr(p->p_name, "preinit", sizeof(p->p_name))) {
+ launchd_crashed_prefix_str = "LTE preinit process exited";
+ } else {
+ launchd_crashed_prefix_str = "initproc exited";
+ }
+
+#if (DEVELOPMENT || DEBUG) && CONFIG_COREDUMP
+ /*
+ * For debugging purposes, generate a core file of initproc before
+ * panicking. Leave at least 300 MB free on the root volume, and ignore
+ * the process's corefile ulimit. fsync() the file to ensure it lands on disk
+ * before the panic hits.
+ */
+
+ int err;
+ uint64_t coredump_start = mach_absolute_time();
+ uint64_t coredump_end;
+ clock_sec_t tv_sec;
+ clock_usec_t tv_usec;
+ uint32_t tv_msec;
+
+
+ err = coredump(p, 300, COREDUMP_IGNORE_ULIMIT | COREDUMP_FULLFSYNC);
+
+ coredump_end = mach_absolute_time();
+
+ absolutetime_to_microtime(coredump_end - coredump_start, &tv_sec, &tv_usec);
+
+ tv_msec = tv_usec / 1000;
+
+ if (err != 0) {
+ printf("Failed to generate initproc core file: error %d, took %d.%03d seconds\n",
+ err, (uint32_t)tv_sec, tv_msec);
+ } else {
+ printf("Generated initproc core file in %d.%03d seconds\n",
+ (uint32_t)tv_sec, tv_msec);
+ }
+#endif /* (DEVELOPMENT || DEBUG) && CONFIG_COREDUMP */
+
+ sync(p, (void *)NULL, (int *)NULL);
+
+ if (p->p_exit_reason == OS_REASON_NULL) {
+ panic_with_options(0, NULL, DEBUGGER_OPTION_INITPROC_PANIC, "%s -- no exit reason available -- (signal %d, exit status %d %s)",
+ launchd_crashed_prefix_str, WTERMSIG(rv), WEXITSTATUS(rv), ((p->p_csflags & CS_KILLED) ? "CS_KILLED" : ""));
+ } else {
+ panic_with_options(0, NULL, DEBUGGER_OPTION_INITPROC_PANIC, "%s %s -- exit reason namespace %d subcode 0x%llx description: %." LAUNCHD_PANIC_REASON_STRING_MAXLEN "s",
+ ((p->p_csflags & CS_KILLED) ? "CS_KILLED" : ""),
+ launchd_crashed_prefix_str, p->p_exit_reason->osr_namespace, p->p_exit_reason->osr_code,
+ launchd_exit_reason_desc ? launchd_exit_reason_desc : "none");
+ }
+}
+
+#define OS_REASON_IFLAG_USER_FAULT 0x1
+
+#define OS_REASON_TOTAL_USER_FAULTS_PER_PROC 5
+
+static int
+abort_with_payload_internal(proc_t p,
+ uint32_t reason_namespace, uint64_t reason_code,
+ user_addr_t payload, uint32_t payload_size,
+ user_addr_t reason_string, uint64_t reason_flags,
+ uint32_t internal_flags)
+{
+ os_reason_t exit_reason = OS_REASON_NULL;
+ kern_return_t kr = KERN_SUCCESS;
+
+ if (internal_flags & OS_REASON_IFLAG_USER_FAULT) {
+ uint32_t old_value = atomic_load_explicit(&p->p_user_faults,
+ memory_order_relaxed);
+ for (;;) {
+ if (old_value >= OS_REASON_TOTAL_USER_FAULTS_PER_PROC) {
+ return EQFULL;
+ }
+ // this reloads the value in old_value
+ if (atomic_compare_exchange_strong_explicit(&p->p_user_faults,
+ &old_value, old_value + 1, memory_order_relaxed,
+ memory_order_relaxed)) {
+ break;
+ }
+ }
+ }
+
+ KERNEL_DEBUG_CONSTANT(BSDDBG_CODE(DBG_BSD_PROC, BSD_PROC_EXITREASON_CREATE) | DBG_FUNC_NONE,
+ p->p_pid, reason_namespace,
+ reason_code, 0, 0);
+
+ exit_reason = build_userspace_exit_reason(reason_namespace, reason_code,
+ payload, payload_size, reason_string, reason_flags | OS_REASON_FLAG_ABORT);
+
+ if (internal_flags & OS_REASON_IFLAG_USER_FAULT) {
+ mach_exception_code_t code = 0;
+
+ EXC_GUARD_ENCODE_TYPE(code, GUARD_TYPE_USER); /* simulated EXC_GUARD */
+ EXC_GUARD_ENCODE_FLAVOR(code, 0);
+ EXC_GUARD_ENCODE_TARGET(code, reason_namespace);
+
+ if (exit_reason == OS_REASON_NULL) {
+ kr = KERN_RESOURCE_SHORTAGE;
+ } else {
+ kr = task_violated_guard(code, reason_code, exit_reason);
+ }
+ os_reason_free(exit_reason);
+ } else {
+ /*
+ * We use SIGABRT (rather than calling exit directly from here) so that
+ * the debugger can catch abort_with_{reason,payload} calls.
+ */
+ psignal_try_thread_with_reason(p, current_thread(), SIGABRT, exit_reason);
+ }
+
+ switch (kr) {
+ case KERN_SUCCESS:
+ return 0;
+ case KERN_NOT_SUPPORTED:
+ return ENOTSUP;
+ case KERN_INVALID_ARGUMENT:
+ return EINVAL;
+ case KERN_RESOURCE_SHORTAGE:
+ default:
+ return EBUSY;
+ }
+}
+
+int
+abort_with_payload(struct proc *cur_proc, struct abort_with_payload_args *args,
+ __unused void *retval)
+{
+ abort_with_payload_internal(cur_proc, args->reason_namespace,
+ args->reason_code, args->payload, args->payload_size,
+ args->reason_string, args->reason_flags, 0);
+
+ return 0;
+}
+
+int
+os_fault_with_payload(struct proc *cur_proc,
+ struct os_fault_with_payload_args *args, __unused int *retval)
+{
+ return abort_with_payload_internal(cur_proc, args->reason_namespace,
+ args->reason_code, args->payload, args->payload_size,
+ args->reason_string, args->reason_flags, OS_REASON_IFLAG_USER_FAULT);
+}
+
+
/*
* exit --
* Death of process.
*/
+__attribute__((noreturn))
void
exit(proc_t p, struct exit_args *uap, int *retval)
{
- exit1(p, W_EXITCODE(uap->rval, 0), retval);
+ p->p_xhighbits = ((uint32_t)(uap->rval) & 0xFF000000) >> 24;
+ exit1(p, W_EXITCODE((uint32_t)uap->rval, 0), retval);
thread_exception_return();
/* NOTREACHED */
- while (TRUE)
+ while (TRUE) {
thread_block(THREAD_CONTINUE_NULL);
+ }
/* NOTREACHED */
}
int
exit1_internal(proc_t p, int rv, int *retval, boolean_t thread_can_terminate, boolean_t perf_notify,
- int jetsam_flags)
+ int jetsam_flags)
+{
+ return exit_with_reason(p, rv, retval, thread_can_terminate, perf_notify, jetsam_flags, OS_REASON_NULL);
+}
+
+/*
+ * NOTE: exit_with_reason drops a reference on the passed exit_reason
+ */
+int
+exit_with_reason(proc_t p, int rv, int *retval, boolean_t thread_can_terminate, boolean_t perf_notify,
+ int jetsam_flags, struct os_reason *exit_reason)
{
thread_t self = current_thread();
struct task *task = p->task;
* right here.
*/
- ut = get_bsdthread_info(self);
- if (ut->uu_flag & UT_VFORK) {
+ ut = get_bsdthread_info(self);
+ if ((p == current_proc()) &&
+ (ut->uu_flag & UT_VFORK)) {
+ os_reason_free(exit_reason);
if (!thread_can_terminate) {
return EINVAL;
}
vfork_exit(p, rv);
- vfork_return(p , retval, p->p_pid);
+ vfork_return(p, retval, p->p_pid);
unix_syscall_return(0);
/* NOT REACHED */
- }
+ }
- /*
+ /*
* The parameter list of audit_syscall_exit() was augmented to
* take the Darwin syscall number as the first parameter,
* which is currently required by mac_audit_postselect().
*/
- /*
+ /*
* The BSM token contains two components: an exit status as passed
- * to exit(), and a return value to indicate what sort of exit it
+ * to exit(), and a return value to indicate what sort of exit it
* was. The exit status is WEXITSTATUS(rv), but it's not clear
- * what the return value is.
+ * what the return value is.
*/
AUDIT_ARG(exit, WEXITSTATUS(rv), 0);
+ /*
+ * TODO: what to audit here when jetsam calls exit and the uthread,
+ * 'ut' does not belong to the proc, 'p'.
+ */
AUDIT_SYSCALL_EXIT(SYS_exit, p, ut, 0); /* Exit is always successfull */
DTRACE_PROC1(exit, int, CLD_EXITED);
/* mark process is going to exit and pull out of DBG/disk throttle */
/* TODO: This should be done after becoming exit thread */
- proc_set_task_policy(p->task, THREAD_NULL, TASK_POLICY_ATTRIBUTE,
- TASK_POLICY_TERMINATED, TASK_POLICY_ENABLE);
+ proc_set_task_policy(p->task, TASK_POLICY_ATTRIBUTE,
+ TASK_POLICY_TERMINATED, TASK_POLICY_ENABLE);
- proc_lock(p);
- error = proc_transstart(p, 1, ((jetsam_flags & P_JETSAM_VNODE) ? 1 : 0));
+ proc_lock(p);
+ error = proc_transstart(p, 1, (jetsam_flags ? 1 : 0));
if (error == EDEADLK) {
- /* Temp: If deadlock error, then it implies multithreaded exec is
- * in progress. Instread of letting exit continue and
- * corrupting the freed memory, let the exit thread
- * return. This will save corruption in remote case.
+ /*
+ * If proc_transstart() returns EDEADLK, then another thread
+ * is either exec'ing or exiting. Return an error and allow
+ * the other thread to continue.
*/
proc_unlock(p);
- if (current_proc() == p){
- if (p->exit_thread == self)
+ os_reason_free(exit_reason);
+ if (current_proc() == p) {
+ if (p->exit_thread == self) {
printf("exit_thread failed to exit, leaving process %s[%d] in unkillable limbo\n",
- p->p_comm, p->p_pid);
- thread_exception_return();
- } else {
- /* external termination like jetsam */
- return(error);
+ p->p_comm, p->p_pid);
+ }
+
+ if (thread_can_terminate) {
+ thread_exception_return();
+ }
}
+
+ return error;
}
while (p->exit_thread != self) {
if (sig_try_locked(p) <= 0) {
proc_transend(p, 1);
+ os_reason_free(exit_reason);
+
if (get_threadtask(self) != task) {
proc_unlock(p);
- return(0);
- }
+ return 0;
+ }
proc_unlock(p);
-
+
thread_terminate(self);
if (!thread_can_terminate) {
return 0;
}
sig_lock_to_exit(p);
}
- if (p == initproc && current_proc() == p) {
- proc_unlock(p);
- printf("pid 1 exited (signal %d, exit %d)",
- WTERMSIG(rv), WEXITSTATUS(rv));
-#if (DEVELOPMENT || DEBUG)
- int err;
- /*
- * For debugging purposes, generate a core file of initproc before
- * panicking. Leave at least 300 MB free on the root volume, and ignore
- * the process's corefile ulimit.
- */
- if ((err = coredump(p, 300, 1)) != 0) {
- printf("Failed to generate initproc core file: error %d", err);
- } else {
- printf("Generated initproc core file");
- sync(p, (void *)NULL, (int *)NULL);
- }
-#endif
- init_task_died = TRUE;
- panic("%s died\nState at Last Exception:\n\n%s",
- (p->p_comm[0] != '\0' ?
- p->p_comm :
- "launchd"),
- init_task_failure_data);
+
+ if (exit_reason != OS_REASON_NULL) {
+ KERNEL_DEBUG_CONSTANT(BSDDBG_CODE(DBG_BSD_PROC, BSD_PROC_EXITREASON_COMMIT) | DBG_FUNC_NONE,
+ p->p_pid, exit_reason->osr_namespace,
+ exit_reason->osr_code, 0, 0);
}
+ assert(p->p_exit_reason == OS_REASON_NULL);
+ p->p_exit_reason = exit_reason;
+
p->p_lflag |= P_LEXIT;
p->p_xstat = rv;
p->p_lflag |= jetsam_flags;
/* Last thread to terminate will call proc_exit() */
task_terminate_internal(task);
- return(0);
+ return 0;
}
+#if CONFIG_MEMORYSTATUS
+/*
+ * Remove this process from jetsam bands for freezing or exiting. Note this will block, if the process
+ * is currently being frozen.
+ * The proc_list_lock is held by the caller.
+ * NB: If the process should be ineligible for future freezing or jetsaming the caller should first set
+ * the p_listflag P_LIST_EXITED bit.
+ */
+static void
+proc_memorystatus_remove(proc_t p)
+{
+ LCK_MTX_ASSERT(proc_list_mlock, LCK_MTX_ASSERT_OWNED);
+ while (memorystatus_remove(p) == EAGAIN) {
+ os_log(OS_LOG_DEFAULT, "memorystatus_remove: Process[%d] tried to exit while being frozen. Blocking exit until freeze completes.", p->p_pid);
+ msleep(&p->p_memstat_state, proc_list_mlock, PWAIT, "proc_memorystatus_remove", NULL);
+ }
+}
+#endif
+
void
-proc_prepareexit(proc_t p, int rv, boolean_t perf_notify)
+proc_prepareexit(proc_t p, int rv, boolean_t perf_notify)
{
- mach_exception_data_type_t code, subcode;
+ mach_exception_data_type_t code = 0, subcode = 0;
+
struct uthread *ut;
thread_t self = current_thread();
ut = get_bsdthread_info(self);
struct rusage_superset *rup;
+ int kr = 0;
+ int create_corpse = FALSE;
- /* If a core should be generated, notify crash reporter */
- if (hassigprop(WTERMSIG(rv), SA_CORE) || ((p->p_csflags & CS_KILLED) != 0)) {
- /*
+ if (p == initproc) {
+ launchd_crashed_panic(p, rv);
+ /* NOTREACHED */
+ }
+
+ /*
+ * Generate a corefile/crashlog if:
+ * The process doesn't have an exit reason that indicates no crash report should be created
+ * AND any of the following are true:
+ * - The process was terminated due to a fatal signal that generates a core
+ * - The process was killed due to a code signing violation
+ * - The process has an exit reason that indicates we should generate a crash report
+ *
+ * The first condition is necessary because abort_with_reason()/payload() use SIGABRT
+ * (which normally triggers a core) but may indicate that no crash report should be created.
+ */
+ if (!(PROC_HAS_EXITREASON(p) && (PROC_EXITREASON_FLAGS(p) & OS_REASON_FLAG_NO_CRASH_REPORT)) &&
+ (hassigprop(WTERMSIG(rv), SA_CORE) || ((p->p_csflags & CS_KILLED) != 0) ||
+ (PROC_HAS_EXITREASON(p) && (PROC_EXITREASON_FLAGS(p) &
+ OS_REASON_FLAG_GENERATE_CRASH_REPORT)))) {
+ /*
* Workaround for processes checking up on PT_DENY_ATTACH:
* should be backed out post-Leopard (details in 5431025).
*/
- if ((SIGSEGV == WTERMSIG(rv)) &&
- (p->p_pptr->p_lflag & P_LNOATTACH)) {
+ if ((SIGSEGV == WTERMSIG(rv)) &&
+ (p->p_pptr->p_lflag & P_LNOATTACH)) {
goto skipcheck;
}
/*
* Crash Reporter looks for the signal value, original exception
- * type, and low 20 bits of the original code in code[0]
- * (8, 4, and 20 bits respectively). code[1] is unmodified.
+ * type, and low 20 bits of the original code in code[0]
+ * (8, 4, and 20 bits respectively). code[1] is unmodified.
*/
code = ((WTERMSIG(rv) & 0xff) << 24) |
- ((ut->uu_exception & 0x0f) << 20) |
- ((int)ut->uu_code & 0xfffff);
+ ((ut->uu_exception & 0x0f) << 20) |
+ ((int)ut->uu_code & 0xfffff);
subcode = ut->uu_subcode;
- (void) task_exception_notify(EXC_CRASH, code, subcode);
+
+ kr = task_exception_notify(EXC_CRASH, code, subcode);
+
+ /* Nobody handled EXC_CRASH?? remember to make corpse */
+ if (kr != 0) {
+ create_corpse = TRUE;
+ }
}
skipcheck:
(void)sys_perf_notify(self, p->p_pid);
}
+
+ /* stash the usage into corpse data if making_corpse == true */
+ if (create_corpse == TRUE) {
+ kr = task_mark_corpse(p->task);
+ if (kr != KERN_SUCCESS) {
+ if (kr == KERN_NO_SPACE) {
+ printf("Process[%d] has no vm space for corpse info.\n", p->p_pid);
+ } else if (kr == KERN_NOT_SUPPORTED) {
+ printf("Process[%d] was destined to be corpse. But corpse is disabled by config.\n", p->p_pid);
+ } else {
+ printf("Process[%d] crashed: %s. Too many corpses being created.\n", p->p_pid, p->p_comm);
+ }
+ create_corpse = FALSE;
+ }
+ }
+
/*
* Before this process becomes a zombie, stash resource usage
* stats in the proc for external observers to query
*
* If the zombie allocation fails, just punt the stats.
*/
- MALLOC_ZONE(rup, struct rusage_superset *,
- sizeof (*rup), M_ZOMBIE, M_WAITOK);
- if (rup != NULL) {
- gather_rusage_info(p, &rup->ri, RUSAGE_INFO_CURRENT);
- rup->ri.ri_phys_footprint = 0;
- rup->ri.ri_proc_exit_abstime = mach_absolute_time();
+ rup = zalloc(zombie_zone);
+ gather_rusage_info(p, &rup->ri, RUSAGE_INFO_CURRENT);
+ rup->ri.ri_phys_footprint = 0;
+ rup->ri.ri_proc_exit_abstime = mach_absolute_time();
+ /*
+ * Make the rusage_info visible to external observers
+ * only after it has been completely filled in.
+ */
+ p->p_ru = rup;
+
+ if (create_corpse) {
+ int est_knotes = 0, num_knotes = 0;
+ uint64_t *buffer = NULL;
+ uint32_t buf_size = 0;
+
+ /* Get all the udata pointers from kqueue */
+ est_knotes = kevent_proc_copy_uptrs(p, NULL, 0);
+ if (est_knotes > 0) {
+ buf_size = (uint32_t)((est_knotes + 32) * sizeof(uint64_t));
+ buffer = kheap_alloc(KHEAP_TEMP, buf_size, Z_WAITOK);
+ num_knotes = kevent_proc_copy_uptrs(p, buffer, buf_size);
+ if (num_knotes > est_knotes + 32) {
+ num_knotes = est_knotes + 32;
+ }
+ }
- /*
- * Make the rusage_info visible to external observers
- * only after it has been completely filled in.
- */
- p->p_ru = rup;
+ /* Update the code, subcode based on exit reason */
+ proc_update_corpse_exception_codes(p, &code, &subcode);
+ populate_corpse_crashinfo(p, p->task, rup,
+ code, subcode, buffer, num_knotes, NULL);
+ if (buffer != NULL) {
+ kheap_free(KHEAP_TEMP, buffer, buf_size);
+ }
}
-
/*
* Remove proc from allproc queue and from pidhash chain.
* Need to do this before we do anything that can block.
proc_list_lock();
#if CONFIG_MEMORYSTATUS
- memorystatus_remove(p, TRUE);
+ proc_memorystatus_remove(p);
#endif
LIST_REMOVE(p, p_list);
- LIST_INSERT_HEAD(&zombproc, p, p_list); /* Place onto zombproc. */
+ LIST_INSERT_HEAD(&zombproc, p, p_list); /* Place onto zombproc. */
/* will not be visible via proc_find */
p->p_listflag |= P_LIST_EXITED;
proc_list_unlock();
-
#ifdef PGINPROF
vmsizmon();
#endif
proc_unlock(p);
}
-void
+void
proc_exit(proc_t p)
{
proc_t q;
proc_lock(p);
proc_transstart(p, 1, 0);
- if( !(p->p_lflag & P_LEXIT)) {
+ if (!(p->p_lflag & P_LEXIT)) {
/*
* This can happen if a thread_terminate() occurs
* in a single-threaded process.
p->p_lflag |= P_LEXIT;
proc_transend(p, 1);
proc_unlock(p);
- proc_prepareexit(p, 0, TRUE);
+ proc_prepareexit(p, 0, TRUE);
(void) task_terminate_internal(task);
proc_lock(p);
} else {
*/
if ((p->p_lflag & P_LINSIGNAL) || (p->p_sigwaitcnt > 0)) {
p->p_sigwaitcnt++;
- while ((p->p_lflag & P_LINSIGNAL) || (p->p_sigwaitcnt > 1))
+ while ((p->p_lflag & P_LINSIGNAL) || (p->p_sigwaitcnt > 1)) {
msleep(&p->p_sigmask, &p->p_mlock, PWAIT, "proc_sigdrain", NULL);
+ }
p->p_sigwaitcnt--;
}
proc_unlock(p);
- pid = p->p_pid;
- exitval = p->p_xstat;
- KERNEL_DEBUG_CONSTANT_IST(KDEBUG_COMMON,
- BSDDBG_CODE(DBG_BSD_PROC, BSD_PROC_EXIT) | DBG_FUNC_START,
- pid, exitval, 0, 0, 0);
-
-#if CONFIG_DTRACE
- /*
- * Free any outstanding lazy dof entries. It is imperative we
- * always call dtrace_lazy_dofs_destroy, rather than null check
- * and call if !NULL. If we NULL test, during lazy dof faulting
- * we can race with the faulting code and proceed from here to
- * beyond the helpers cleanup. The lazy dof faulting will then
- * install new helpers which will never be cleaned up, and leak.
- */
- dtrace_lazy_dofs_destroy(p);
-
- /*
- * Clean up any DTrace helper actions or probes for the process.
- */
- if (p->p_dtrace_helpers != NULL) {
- (*dtrace_helpers_cleanup)(p);
- }
-
- /*
- * Clean up any DTrace probes associated with this process.
- */
- /*
- * APPLE NOTE: We release ptss pages/entries in dtrace_fasttrap_exit_ptr(),
- * call this after dtrace_helpers_cleanup()
- */
- proc_lock(p);
- if (p->p_dtrace_probes && dtrace_fasttrap_exit_ptr) {
- (*dtrace_fasttrap_exit_ptr)(p);
- }
- proc_unlock(p);
-#endif
-
- nspace_proc_exit(p);
+ pid = p->p_pid;
+ exitval = p->p_xstat;
+ KERNEL_DEBUG_CONSTANT_IST(KDEBUG_COMMON,
+ BSDDBG_CODE(DBG_BSD_PROC, BSD_PROC_EXIT) | DBG_FUNC_START,
+ pid, exitval, 0, 0, 0);
-#if VM_PRESSURE_EVENTS
- vm_pressure_proc_cleanup(p);
+#if CONFIG_DTRACE
+ dtrace_proc_exit(p);
#endif
/*
* need to cancel async IO requests that can be cancelled and wait for those
* already active. MAY BLOCK!
*/
-
+
proc_refdrain(p);
/* if any pending cpu limits action, clear it */
task_clear_cpuusage(p->task, TRUE);
- workqueue_mark_exiting(p);
- workqueue_exit(p);
+ workq_mark_exiting(p);
_aio_exit( p );
*/
fdfree(p);
+ /*
+ * Once all the knotes, kqueues & workloops are destroyed, get rid of the
+ * workqueue.
+ */
+ workq_exit(p);
+
if (uth->uu_lowpri_window) {
- /*
+ /*
* task is marked as a low priority I/O type
* and the I/O we issued while in flushing files on close
* collided with normal I/O operations...
throttle_lowpri_io(0);
}
+ if (p->p_lflag & P_LNSPACE_RESOLVER) {
+ /*
+ * The namespace resolver is exiting; there may be
+ * outstanding materialization requests to clean up.
+ */
+ nspace_resolver_exited(p);
+ }
+
#if SYSV_SHM
/* Close ref SYSV Shared memory*/
- if (p->vm_shm)
+ if (p->vm_shm) {
shmexit(p);
+ }
#endif
#if SYSV_SEM
/* Release SYSV semaphores */
semexit(p);
#endif
-
+
#if PSYNCH
pth_proc_hashdelete(p);
#endif /* PSYNCH */
sessp = proc_session(p);
if (SESS_LEADER(p, sessp)) {
-
if (sessp->s_ttyvp != NULLVP) {
struct vnode *ttyvp;
int ttyvid;
if ((tp != TTY_NULL) && (tp->t_session == sessp)) {
session_unlock(sessp);
- /*
- * We're going to SIGHUP the foreground process
- * group. It can't change from this point on
- * until the revoke is complete.
- * The process group changes under both the tty
- * lock and proc_list_lock but we need only one
- */
- tty_lock(tp);
- ttysetpgrphup(tp);
- tty_unlock(tp);
-
tty_pgsignal(tp, SIGHUP, 1);
session_lock(sessp);
(void) ttywait(tp);
tty_unlock(tp);
}
- context.vc_thread = proc_thread(p); /* XXX */
+
+ context.vc_thread = NULL;
context.vc_ucred = kauth_cred_proc_ref(p);
VNOP_REVOKE(ttyvp, REVOKEALL, &context);
if (cttyflag) {
ttyvp = NULLVP;
}
if (tp) {
- /*
- * This is cleared even if not set. This is also done in
- * spec_close to ensure that the flag is cleared.
- */
- tty_lock(tp);
- ttyclrpgrphup(tp);
- tty_unlock(tp);
-
ttyfree(tp);
}
}
fixjobc(p, pg, 0);
pg_rele(pg);
- p->p_rlimit[RLIMIT_FSIZE].rlim_cur = RLIM_INFINITY;
+ /*
+ * Change RLIMIT_FSIZE for accounting/debugging. proc_limitsetcur_internal() will COW the current plimit
+ * before making changes if the current plimit is shared. The COW'ed plimit will be freed
+ * below by calling proc_limitdrop().
+ */
+ proc_limitsetcur_internal(p, RLIMIT_FSIZE, RLIM_INFINITY);
+
(void)acct_process(p);
proc_list_lock();
if ((p->p_listflag & P_LIST_EXITCOUNT) == P_LIST_EXITCOUNT) {
p->p_listflag &= ~P_LIST_EXITCOUNT;
proc_shutdown_exitcount--;
- if (proc_shutdown_exitcount == 0)
+ if (proc_shutdown_exitcount == 0) {
wakeup(&proc_shutdown_exitcount);
+ }
}
/* wait till parentrefs are dropped and grant no more */
while ((q = p->p_children.lh_first) != NULL) {
int reparentedtoinit = (q->p_listflag & P_LIST_DEADPARENT) ? 1 : 0;
if (q->p_stat == SZOMB) {
- if (p != q->p_pptr)
+ if (p != q->p_pptr) {
panic("parent child linkage broken");
+ }
/* check for sysctl zomb lookup */
while ((q->p_listflag & P_LIST_WAITING) == P_LIST_WAITING) {
msleep(&q->p_stat, proc_list_mlock, PWAIT, "waitcoll", 0);
* the reference here exclusively and their can be
* no waiters. So there is no need for a wakeup
* after we are done. Also the reap frees the structure
- * and the proc struct cannot be used for wakeups as well.
+ * and the proc struct cannot be used for wakeups as well.
* It is safe to use q here as this is system reap
*/
(void)reap_child_locked(p, q, 1, reparentedtoinit, 1, 0);
} else {
/*
- * Traced processes are killed
- * since their existence means someone is messing up.
- */
+ * Traced processes are killed
+ * since their existence means someone is messing up.
+ */
if (q->p_lflag & P_LTRACED) {
struct proc *opp;
* the time we drop the list_lock and attempt
* to acquire its proc_lock.
*/
- if (proc_ref_locked(q) != q)
+ if (proc_ref_locked(q) != q) {
continue;
+ }
proc_list_unlock();
proc_unlock(q);
/*
- * The sigwait_thread could be stopped at a
- * breakpoint. Wake it up to kill.
- * Need to do this as it could be a thread which is not
- * the first thread in the task. So any attempts to kill
- * the process would result into a deadlock on q->sigwait.
- */
+ * The sigwait_thread could be stopped at a
+ * breakpoint. Wake it up to kill.
+ * Need to do this as it could be a thread which is not
+ * the first thread in the task. So any attempts to kill
+ * the process would result into a deadlock on q->sigwait.
+ */
thread_resume(thread);
clear_wait(thread, THREAD_INTERRUPTED);
- threadsignal(thread, SIGKILL, 0);
+ threadsignal(thread, SIGKILL, 0, TRUE);
} else {
proc_unlock(q);
}
proc_childdrainend(p);
proc_list_unlock();
+#if CONFIG_MACF
+ /*
+ * Notify MAC policies that proc is dead.
+ * This should be replaced with proper label management
+ * (rdar://problem/32126399).
+ */
+ mac_proc_notify_exit(p);
+#endif
+
/*
* Release reference to text vnode
*/
* structure, this information is lost.
*/
if (p->p_ru != NULL) {
- calcru(p, &p->p_stats->p_ru.ru_utime, &p->p_stats->p_ru.ru_stime, NULL);
- p->p_ru->ru = p->p_stats->p_ru;
+ calcru(p, &p->p_stats->p_ru.ru_utime, &p->p_stats->p_ru.ru_stime, NULL);
+ p->p_ru->ru = p->p_stats->p_ru;
- ruadd(&(p->p_ru->ru), &p->p_stats->p_cru);
+ ruadd(&(p->p_ru->ru), &p->p_stats->p_cru);
}
/*
}
}
- proc_spinlock(p);
- if (thread_call_cancel(p->p_rcall))
- p->p_ractive--;
-
- while (p->p_ractive > 0) {
- proc_spinunlock(p);
-
- delay(1);
-
- proc_spinlock(p);
- }
- proc_spinunlock(p);
-
- thread_call_free(p->p_rcall);
- p->p_rcall = NULL;
+ proc_free_realitimer(p);
/*
* Other substructures are freed from wait().
*/
- FREE_ZONE(p->p_stats, sizeof *p->p_stats, M_PSTATS);
+ zfree(proc_stats_zone, p->p_stats);
p->p_stats = NULL;
- FREE_ZONE(p->p_sigacts, sizeof *p->p_sigacts, M_SIGACTS);
+ zfree(proc_sigacts_zone, p->p_sigacts);
p->p_sigacts = NULL;
- proc_limitdrop(p, 1);
- p->p_limit = NULL;
-
- vm_purgeable_disown(p->task);
+ proc_limitdrop(p);
/*
* Finish up by terminating the task
*/
pp = proc_parent(p);
if (pp->p_flag & P_NOCLDWAIT) {
-
if (p->p_ru != NULL) {
proc_lock(pp);
#if 3839178
- /*
- * If the parent is ignoring SIGCHLD, then POSIX requires
- * us to not add the resource usage to the parent process -
- * we are only going to hand it off to init to get reaped.
- * We should contest the standard in this case on the basis
- * of RLIMIT_CPU.
- */
-#else /* !3839178 */
- /*
- * Add child resource usage to parent before giving
- * zombie to init. If we were unable to allocate a
- * zombie structure, this information is lost.
- */
+ /*
+ * If the parent is ignoring SIGCHLD, then POSIX requires
+ * us to not add the resource usage to the parent process -
+ * we are only going to hand it off to init to get reaped.
+ * We should contest the standard in this case on the basis
+ * of RLIMIT_CPU.
+ */
+#else /* !3839178 */
+ /*
+ * Add child resource usage to parent before giving
+ * zombie to init. If we were unable to allocate a
+ * zombie structure, this information is lost.
+ */
ruadd(&pp->p_stats->p_cru, &p->p_ru->ru);
-#endif /* !3839178 */
+#endif /* !3839178 */
update_rusage_info_child(&pp->p_stats->ri_child, &p->p_ru->ri);
proc_unlock(pp);
}
-
+
/* kernel can reap this one, no need to move it to launchd */
proc_list_lock();
p->p_listflag |= P_LIST_DEADPARENT;
if (pp != initproc) {
proc_lock(pp);
pp->si_pid = p->p_pid;
+ pp->p_xhighbits = p->p_xhighbits;
+ p->p_xhighbits = 0;
pp->si_status = p->p_xstat;
pp->si_code = CLD_EXITED;
/*
* The write is to an int and is coherent. Also parent is
* keyed off of list lock for reaping
*/
+ DTRACE_PROC2(exited, proc_t, p, int, exitval);
KERNEL_DEBUG_CONSTANT_IST(KDEBUG_COMMON,
- BSDDBG_CODE(DBG_BSD_PROC, BSD_PROC_EXIT) | DBG_FUNC_END,
- pid, exitval, 0, 0, 0);
+ BSDDBG_CODE(DBG_BSD_PROC, BSD_PROC_EXIT) | DBG_FUNC_END,
+ pid, exitval, 0, 0, 0);
p->p_stat = SZOMB;
- /*
+ /*
* The current process can be reaped so, no one
* can depend on this
*/
psignal(pp, SIGCHLD);
-
+
/* and now wakeup the parent */
proc_list_lock();
wakeup((caddr_t)pp);
* The write is to an int and is coherent. Also parent is
* keyed off of list lock for reaping
*/
+ DTRACE_PROC2(exited, proc_t, p, int, exitval);
proc_list_lock();
KERNEL_DEBUG_CONSTANT_IST(KDEBUG_COMMON,
- BSDDBG_CODE(DBG_BSD_PROC, BSD_PROC_EXIT) | DBG_FUNC_END,
- pid, exitval, 0, 0, 0);
+ BSDDBG_CODE(DBG_BSD_PROC, BSD_PROC_EXIT) | DBG_FUNC_END,
+ pid, exitval, 0, 0, 0);
/* check for sysctl zomb lookup */
while ((p->p_listflag & P_LIST_WAITING) == P_LIST_WAITING) {
msleep(&p->p_stat, proc_list_mlock, PWAIT, "waitcoll", 0);
* the reference here exclusively and their can be
* no waiters. So there is no need for a wakeup
* after we are done. AlsO the reap frees the structure
- * and the proc struct cannot be used for wakeups as well.
+ * and the proc struct cannot be used for wakeups as well.
* It is safe to use p here as this is system reap
*/
(void)reap_child_locked(pp, p, 1, 0, 1, 1);
/* list lock dropped by reap_child_locked */
}
if (uth->uu_lowpri_window) {
- /*
+ /*
* task is marked as a low priority I/O type and we've
* somehow picked up another throttle during exit processing...
* no need to throttle this thread since its going away
}
proc_rele(pp);
-
}
static int
reap_child_locked(proc_t parent, proc_t child, int deadparent, int reparentedtoinit, int locked, int droplock)
{
- proc_t trace_parent = PROC_NULL; /* Traced parent process, if tracing */
+ proc_t trace_parent = PROC_NULL; /* Traced parent process, if tracing */
- if (locked == 1)
+ if (locked == 1) {
proc_list_unlock();
-
+ }
+
/*
* If we got the child via a ptrace 'attach',
* we need to give it back to the old parent.
*
* Exception: someone who has been reparented to launchd before being
* ptraced can simply be reaped, refer to radar 5677288
- * p_oppid -> ptraced
- * trace_parent == initproc -> away from launchd
- * reparentedtoinit -> came to launchd by reparenting
+ * p_oppid -> ptraced
+ * trace_parent == initproc -> away from launchd
+ * reparentedtoinit -> came to launchd by reparenting
*/
if (child->p_oppid) {
int knote_hint;
proc_unlock(child);
if ((trace_parent = proc_find(oppid))
- && !((trace_parent == initproc) && reparentedtoinit)) {
-
+ && !((trace_parent == initproc) && reparentedtoinit)) {
if (trace_parent != initproc) {
- /*
- * proc internal fileds and p_ucred usage safe
- * here as child is dead and is not reaped or
- * reparented yet
+ /*
+ * proc internal fileds and p_ucred usage safe
+ * here as child is dead and is not reaped or
+ * reparented yet
*/
proc_lock(trace_parent);
trace_parent->si_pid = child->p_pid;
proc_unlock(trace_parent);
}
proc_reparentlocked(child, trace_parent, 1, 0);
-
+
/* resend knote to original parent (and others) after reparenting */
proc_knote(child, knote_hint);
-
+
psignal(trace_parent, SIGCHLD);
proc_list_lock();
wakeup((caddr_t)trace_parent);
wakeup(&child->p_stat);
proc_list_unlock();
proc_rele(trace_parent);
- if ((locked == 1) && (droplock == 0))
+ if ((locked == 1) && (droplock == 0)) {
proc_list_lock();
- return (0);
+ }
+ return 0;
}
/*
proc_rele(trace_parent);
}
}
-
+
#pragma clang diagnostic push
#pragma clang diagnostic ignored "-Wdeprecated-declarations"
proc_knote(child, NOTE_REAP);
* of RLIMIT_CPU.
*/
if (!(parent->p_flag & P_NOCLDWAIT))
-#endif /* 3839178 */
- ruadd(&parent->p_stats->p_cru, &child->p_ru->ru);
+#endif /* 3839178 */
+ ruadd(&parent->p_stats->p_cru, &child->p_ru->ru);
update_rusage_info_child(&parent->p_stats->ri_child, &child->p_ru->ri);
proc_unlock(parent);
- FREE_ZONE(child->p_ru, sizeof *child->p_ru, M_ZOMBIE);
+ zfree(zombie_zone, child->p_ru);
child->p_ru = NULL;
} else {
printf("Warning : lost p_ru for %s\n", child->p_comm);
* and refernce is dropped after these calls down below
* (locking protection is provided by list lock held in chgproccnt)
*/
- (void)chgproccnt(kauth_cred_getruid(child->p_ucred), -1);
-
-#if CONFIG_LCTX
- ALLLCTX_LOCK;
- leavelctx(child);
- ALLLCTX_UNLOCK;
-#endif
-
+#if CONFIG_PERSONAS
/*
- * Free up credentials.
+ * persona_proc_drop calls chgproccnt(-1) on the persona uid,
+ * and (+1) on the child->p_ucred uid
*/
- if (IS_VALID_CRED(child->p_ucred)) {
- kauth_cred_unref(&child->p_ucred);
- }
+ persona_proc_drop(child);
+#endif
+ (void)chgproccnt(kauth_cred_getruid(child->p_ucred), -1);
- /* XXXX Note NOT SAFE TO USE p_ucred from this point onwards */
+ os_reason_free(child->p_exit_reason);
/*
* Finally finished with old proc entry.
leavepgrp(child);
proc_list_lock();
- LIST_REMOVE(child, p_list); /* off zombproc */
+ LIST_REMOVE(child, p_list); /* off zombproc */
parent->p_childrencnt--;
LIST_REMOVE(child, p_sibling);
/* If there are no more children wakeup parent */
- if ((deadparent != 0) && (LIST_EMPTY(&parent->p_children)))
- wakeup((caddr_t)parent); /* with list lock held */
+ if ((deadparent != 0) && (LIST_EMPTY(&parent->p_children))) {
+ wakeup((caddr_t)parent); /* with list lock held */
+ }
child->p_listflag &= ~P_LIST_WAITING;
wakeup(&child->p_stat);
proc_list_unlock();
-#if CONFIG_FINE_LOCK_GROUPS
+ /*
+ * Free up credentials.
+ */
+ if (IS_VALID_CRED(child->p_ucred)) {
+ kauth_cred_t tmp_ucred = child->p_ucred;
+ kauth_cred_unref(&tmp_ucred);
+ child->p_ucred = NOCRED;
+ }
+
lck_mtx_destroy(&child->p_mlock, proc_mlock_grp);
+ lck_mtx_destroy(&child->p_ucred_mlock, proc_ucred_mlock_grp);
lck_mtx_destroy(&child->p_fdmlock, proc_fdmlock_grp);
#if CONFIG_DTRACE
lck_mtx_destroy(&child->p_dtrace_sprlock, proc_lck_grp);
#endif
lck_spin_destroy(&child->p_slock, proc_slock_grp);
-#else /* CONFIG_FINE_LOCK_GROUPS */
- lck_mtx_destroy(&child->p_mlock, proc_lck_grp);
- lck_mtx_destroy(&child->p_fdmlock, proc_lck_grp);
-#if CONFIG_DTRACE
- lck_mtx_destroy(&child->p_dtrace_sprlock, proc_lck_grp);
-#endif
- lck_spin_destroy(&child->p_slock, proc_lck_grp);
-#endif /* CONFIG_FINE_LOCK_GROUPS */
- workqueue_destroy_lock(child);
- FREE_ZONE(child, sizeof *child, M_PROC);
- if ((locked == 1) && (droplock == 0))
+ zfree(proc_zone, child);
+ if ((locked == 1) && (droplock == 0)) {
proc_list_lock();
+ }
- return (1);
+ return 1;
}
struct wait4_nocancel_args *uap;
int *retval;
- if (result)
- return(result);
+ if (result) {
+ return result;
+ }
p = current_proc();
thread = current_thread();
uth = (struct uthread *)get_bsdthread_info(thread);
- wait4_data = &uth->uu_kevent.uu_wait4_data;
+ wait4_data = &uth->uu_save.uus_wait4_data;
uap = wait4_data->args;
retval = wait4_data->retval;
- return(wait4_nocancel(p, uap, retval));
+ return wait4_nocancel(p, uap, retval);
}
int
wait4(proc_t q, struct wait4_args *uap, int32_t *retval)
{
__pthread_testcancel(1);
- return(wait4_nocancel(q, (struct wait4_nocancel_args *)uap, retval));
+ return wait4_nocancel(q, (struct wait4_nocancel_args *)uap, retval);
}
int
AUDIT_ARG(pid, uap->pid);
- if (uap->pid == 0)
+ if (uap->pid == 0) {
uap->pid = -q->p_pgrpid;
+ }
loop:
proc_list_lock();
nfound = 0;
sibling_count = 0;
- for (p = q->p_children.lh_first; p != 0; p = p->p_sibling.le_next) {
- if ( p->p_sibling.le_next != 0 )
+ PCHILDREN_FOREACH(q, p) {
+ if (p->p_sibling.le_next != 0) {
sibling_count++;
+ }
if (uap->pid != WAIT_ANY &&
p->p_pid != uap->pid &&
- p->p_pgrpid != -(uap->pid))
+ p->p_pgrpid != -(uap->pid)) {
continue;
+ }
nfound++;
/* XXX This is racy because we don't get the lock!!!! */
if (p->p_listflag & P_LIST_WAITING) {
+ /* we're not using a continuation here but we still need to stash
+ * the args for stackshot. */
+ uth = current_uthread();
+ wait4_data = &uth->uu_save.uus_wait4_data;
+ wait4_data->args = uap;
+ thread_set_pending_block_hint(current_thread(), kThreadWaitOnProcess);
+
(void)msleep(&p->p_stat, proc_list_mlock, PWAIT, "waitcoll", 0);
goto loop1;
}
proc_list_unlock();
#if CONFIG_MACF
- if ((error = mac_proc_check_wait(q, p)) != 0)
+ if ((error = mac_proc_check_wait(q, p)) != 0) {
goto out;
+ }
#endif
retval[0] = p->p_pid;
if (uap->status) {
/* Legacy apps expect only 8 bits of status */
- status = 0xffff & p->p_xstat; /* convert to int */
+ status = 0xffff & p->p_xstat; /* convert to int */
error = copyout((caddr_t)&status,
- uap->status,
- sizeof(status));
- if (error)
+ uap->status,
+ sizeof(status));
+ if (error) {
goto out;
+ }
}
if (uap->rusage) {
if (p->p_ru == NULL) {
error = ENOMEM;
} else {
if (IS_64BIT_PROCESS(q)) {
- struct user64_rusage my_rusage;
+ struct user64_rusage my_rusage = {};
munge_user64_rusage(&p->p_ru->ru, &my_rusage);
error = copyout((caddr_t)&my_rusage,
- uap->rusage,
- sizeof (my_rusage));
- }
- else {
- struct user32_rusage my_rusage;
+ uap->rusage,
+ sizeof(my_rusage));
+ } else {
+ struct user32_rusage my_rusage = {};
munge_user32_rusage(&p->p_ru->ru, &my_rusage);
error = copyout((caddr_t)&my_rusage,
- uap->rusage,
- sizeof (my_rusage));
+ uap->rusage,
+ sizeof(my_rusage));
}
}
/* information unavailable? */
- if (error)
+ if (error) {
goto out;
+ }
}
/* Conformance change for 6577252.
* When SIGCHLD is blocked and wait() returns because the status
- * of a child process is available and there are no other
+ * of a child process is available and there are no other
* children processes, then any pending SIGCHLD signal is cleared.
*/
- if ( sibling_count == 0 ) {
+ if (sibling_count == 0) {
int mask = sigmask(SIGCHLD);
uth = current_uthread();
- if ( (uth->uu_sigmask & mask) != 0 ) {
+ if ((uth->uu_sigmask & mask) != 0) {
/* we are blocking SIGCHLD signals. clear any pending SIGCHLD.
- * This locking looks funny but it is protecting access to the
+ * This locking looks funny but it is protecting access to the
* thread via p_uthlist.
*/
- proc_lock(q);
- uth->uu_siglist &= ~mask; /* clear pending signal */
+ proc_lock(q);
+ uth->uu_siglist &= ~mask; /* clear pending signal */
proc_unlock(q);
}
}
-
+
/* Clean up */
(void)reap_child_locked(q, p, 0, reparentedtoinit, 0, 0);
- return (0);
+ return 0;
}
if (p->p_stat == SSTOP && (p->p_lflag & P_LWAITED) == 0 &&
(p->p_lflag & P_LTRACED || uap->options & WUNTRACED)) {
proc_list_unlock();
#if CONFIG_MACF
- if ((error = mac_proc_check_wait(q, p)) != 0)
+ if ((error = mac_proc_check_wait(q, p)) != 0) {
goto out;
+ }
#endif
proc_lock(p);
p->p_lflag |= P_LWAITED;
if (uap->status) {
status = W_STOPCODE(p->p_xstat);
error = copyout((caddr_t)&status,
- uap->status,
+ uap->status,
sizeof(status));
- } else
+ } else {
error = 0;
+ }
goto out;
}
/*
(p->p_flag & P_CONTINUED)) {
proc_list_unlock();
#if CONFIG_MACF
- if ((error = mac_proc_check_wait(q, p)) != 0)
+ if ((error = mac_proc_check_wait(q, p)) != 0) {
goto out;
+ }
#endif
/* Prevent other process for waiting for this event */
if (uap->status) {
status = W_STOPCODE(SIGCONT);
error = copyout((caddr_t)&status,
- uap->status,
+ uap->status,
sizeof(status));
- } else
+ } else {
error = 0;
+ }
goto out;
}
p->p_listflag &= ~P_LIST_WAITING;
/* list lock is held when we get here any which way */
if (nfound == 0) {
proc_list_unlock();
- return (ECHILD);
+ return ECHILD;
}
if (uap->options & WNOHANG) {
retval[0] = 0;
proc_list_unlock();
- return (0);
+ return 0;
}
/* Save arguments for continuation. Backing storage is in uthread->uu_arg, and will not be deallocated */
uth = current_uthread();
- wait4_data = &uth->uu_kevent.uu_wait4_data;
+ wait4_data = &uth->uu_save.uus_wait4_data;
wait4_data->args = uap;
wait4_data->retval = retval;
- if ((error = msleep0((caddr_t)q, proc_list_mlock, PWAIT | PCATCH | PDROP, "wait", 0, wait1continue)))
- return (error);
+ thread_set_pending_block_hint(current_thread(), kThreadWaitOnProcess);
+ if ((error = msleep0((caddr_t)q, proc_list_mlock, PWAIT | PCATCH | PDROP, "wait", 0, wait1continue))) {
+ return error;
+ }
goto loop;
out:
p->p_listflag &= ~P_LIST_WAITING;
wakeup(&p->p_stat);
proc_list_unlock();
- return (error);
+ return error;
}
#if DEBUG
-#define ASSERT_LCK_MTX_OWNED(lock) \
- lck_mtx_assert(lock, LCK_MTX_ASSERT_OWNED)
+#define ASSERT_LCK_MTX_OWNED(lock) \
+ lck_mtx_assert(lock, LCK_MTX_ASSERT_OWNED)
#else
-#define ASSERT_LCK_MTX_OWNED(lock) /* nothing */
+#define ASSERT_LCK_MTX_OWNED(lock) /* nothing */
#endif
int
struct waitid_nocancel_args *uap;
int *retval;
- if (result)
- return (result);
+ if (result) {
+ return result;
+ }
p = current_proc();
thread = current_thread();
uth = (struct uthread *)get_bsdthread_info(thread);
- waitid_data = &uth->uu_kevent.uu_waitid_data;
+ waitid_data = &uth->uu_save.uus_waitid_data;
uap = waitid_data->args;
retval = waitid_data->retval;
- return(waitid_nocancel(p, uap, retval));
+ return waitid_nocancel(p, uap, retval);
}
/*
waitid(proc_t q, struct waitid_args *uap, int32_t *retval)
{
__pthread_testcancel(1);
- return (waitid_nocancel(q, (struct waitid_nocancel_args *)uap, retval));
+ return waitid_nocancel(q, (struct waitid_nocancel_args *)uap, retval);
}
int
waitid_nocancel(proc_t q, struct waitid_nocancel_args *uap,
- __unused int32_t *retval)
+ __unused int32_t *retval)
{
- user_siginfo_t siginfo; /* siginfo data to return to caller */
+ user_siginfo_t siginfo; /* siginfo data to return to caller */
boolean_t caller64 = IS_64BIT_PROCESS(q);
int nfound;
proc_t p;
struct _waitid_data *waitid_data;
if (uap->options == 0 ||
- (uap->options & ~(WNOHANG|WNOWAIT|WCONTINUED|WSTOPPED|WEXITED)))
- return (EINVAL); /* bits set that aren't recognized */
-
+ (uap->options & ~(WNOHANG | WNOWAIT | WCONTINUED | WSTOPPED | WEXITED))) {
+ return EINVAL; /* bits set that aren't recognized */
+ }
switch (uap->idtype) {
- case P_PID: /* child with process ID equal to... */
- case P_PGID: /* child with process group ID equal to... */
- if (((int)uap->id) < 0)
- return (EINVAL);
+ case P_PID: /* child with process ID equal to... */
+ case P_PGID: /* child with process group ID equal to... */
+ if (((int)uap->id) < 0) {
+ return EINVAL;
+ }
break;
- case P_ALL: /* any child */
+ case P_ALL: /* any child */
break;
}
proc_list_lock();
loop1:
nfound = 0;
- for (p = q->p_children.lh_first; p != 0; p = p->p_sibling.le_next) {
+ PCHILDREN_FOREACH(q, p) {
switch (uap->idtype) {
- case P_PID: /* child with process ID equal to... */
- if (p->p_pid != (pid_t)uap->id)
+ case P_PID: /* child with process ID equal to... */
+ if (p->p_pid != (pid_t)uap->id) {
continue;
+ }
break;
- case P_PGID: /* child with process group ID equal to... */
- if (p->p_pgrpid != (pid_t)uap->id)
+ case P_PGID: /* child with process group ID equal to... */
+ if (p->p_pgrpid != (pid_t)uap->id) {
continue;
+ }
break;
- case P_ALL: /* any child */
+ case P_ALL: /* any child */
break;
}
*/
if (p->p_listflag & P_LIST_WAITING) {
(void) msleep(&p->p_stat, proc_list_mlock,
- PWAIT, "waitidcoll", 0);
+ PWAIT, "waitidcoll", 0);
goto loop1;
}
- p->p_listflag |= P_LIST_WAITING; /* mark busy */
+ p->p_listflag |= P_LIST_WAITING; /* mark busy */
nfound++;
- bzero(&siginfo, sizeof (siginfo));
+ bzero(&siginfo, sizeof(siginfo));
switch (p->p_stat) {
- case SZOMB: /* Exited */
- if (!(uap->options & WEXITED))
+ case SZOMB: /* Exited */
+ if (!(uap->options & WEXITED)) {
break;
+ }
proc_list_unlock();
#if CONFIG_MACF
- if ((error = mac_proc_check_wait(q, p)) != 0)
+ if ((error = mac_proc_check_wait(q, p)) != 0) {
goto out;
+ }
#endif
siginfo.si_signo = SIGCHLD;
siginfo.si_pid = p->p_pid;
- siginfo.si_status = WEXITSTATUS(p->p_xstat);
+
+ /* If the child terminated abnormally due to a signal, the signum
+ * needs to be preserved in the exit status.
+ */
if (WIFSIGNALED(p->p_xstat)) {
siginfo.si_code = WCOREDUMP(p->p_xstat) ?
- CLD_DUMPED : CLD_KILLED;
- } else
+ CLD_DUMPED : CLD_KILLED;
+ siginfo.si_status = WTERMSIG(p->p_xstat);
+ } else {
siginfo.si_code = CLD_EXITED;
+ siginfo.si_status = WEXITSTATUS(p->p_xstat) & 0x00FFFFFF;
+ }
+ siginfo.si_status |= (((uint32_t)(p->p_xhighbits) << 24) & 0xFF000000);
+ p->p_xhighbits = 0;
if ((error = copyoutsiginfo(&siginfo,
- caller64, uap->infop)) != 0)
+ caller64, uap->infop)) != 0) {
goto out;
+ }
/* Prevent other process for waiting for this event? */
if (!(uap->options & WNOWAIT)) {
(void) reap_child_locked(q, p, 0, 0, 0, 0);
- return (0);
+ return 0;
}
goto out;
- case SSTOP: /* Stopped */
+ case SSTOP: /* Stopped */
/*
* If we are not interested in stopped processes, then
* ignore this one.
*/
- if (!(uap->options & WSTOPPED))
+ if (!(uap->options & WSTOPPED)) {
break;
+ }
/*
* If someone has already waited it, we lost a race
* to be the one to return status.
*/
- if ((p->p_lflag & P_LWAITED) != 0)
+ if ((p->p_lflag & P_LWAITED) != 0) {
break;
+ }
proc_list_unlock();
#if CONFIG_MACF
- if ((error = mac_proc_check_wait(q, p)) != 0)
+ if ((error = mac_proc_check_wait(q, p)) != 0) {
goto out;
+ }
#endif
siginfo.si_signo = SIGCHLD;
siginfo.si_pid = p->p_pid;
- siginfo.si_status = p->p_xstat; /* signal number */
+ siginfo.si_status = p->p_xstat; /* signal number */
siginfo.si_code = CLD_STOPPED;
if ((error = copyoutsiginfo(&siginfo,
- caller64, uap->infop)) != 0)
+ caller64, uap->infop)) != 0) {
goto out;
+ }
/* Prevent other process for waiting for this event? */
if (!(uap->options & WNOWAIT)) {
}
goto out;
- default: /* All other states => Continued */
- if (!(uap->options & WCONTINUED))
+ default: /* All other states => Continued */
+ if (!(uap->options & WCONTINUED)) {
break;
+ }
/*
* If the flag isn't set, then this process has not
* been stopped and continued, or the status has
* already been reaped by another caller of waitid().
*/
- if ((p->p_flag & P_CONTINUED) == 0)
+ if ((p->p_flag & P_CONTINUED) == 0) {
break;
+ }
proc_list_unlock();
#if CONFIG_MACF
- if ((error = mac_proc_check_wait(q, p)) != 0)
+ if ((error = mac_proc_check_wait(q, p)) != 0) {
goto out;
+ }
#endif
siginfo.si_signo = SIGCHLD;
siginfo.si_code = CLD_CONTINUED;
proc_unlock(p);
if ((error = copyoutsiginfo(&siginfo,
- caller64, uap->infop)) != 0)
+ caller64, uap->infop)) != 0) {
goto out;
+ }
/* Prevent other process for waiting for this event? */
if (!(uap->options & WNOWAIT)) {
if (nfound == 0) {
proc_list_unlock();
- return (ECHILD);
+ return ECHILD;
}
if (uap->options & WNOHANG) {
proc_list_unlock();
#if CONFIG_MACF
- if ((error = mac_proc_check_wait(q, p)) != 0)
- return (error);
+ if ((error = mac_proc_check_wait(q, p)) != 0) {
+ return error;
+ }
#endif
/*
* The state of the siginfo structure in this case
* WNOHANG" is to store a zero into si_pid before
* invocation, then check for a non-zero value afterwards.
*/
- return (0);
+ return 0;
}
/* Save arguments for continuation. Backing storage is in uthread->uu_arg, and will not be deallocated */
uth = current_uthread();
- waitid_data = &uth->uu_kevent.uu_waitid_data;
+ waitid_data = &uth->uu_save.uus_waitid_data;
waitid_data->args = uap;
waitid_data->retval = retval;
if ((error = msleep0(q, proc_list_mlock,
- PWAIT | PCATCH | PDROP, "waitid", 0, waitidcontinue)) != 0)
- return (error);
+ PWAIT | PCATCH | PDROP, "waitid", 0, waitidcontinue)) != 0) {
+ return error;
+ }
goto loop;
out:
p->p_listflag &= ~P_LIST_WAITING;
wakeup(&p->p_stat);
proc_list_unlock();
- return (error);
+ return error;
}
/*
* make process 'parent' the new parent of process 'child'.
*/
void
-proc_reparentlocked(proc_t child, proc_t parent, int cansignal, int locked)
+proc_reparentlocked(proc_t child, proc_t parent, int signallable, int locked)
{
proc_t oldparent = PROC_NULL;
- if (child->p_pptr == parent)
+ if (child->p_pptr == parent) {
return;
+ }
- if (locked == 0)
+ if (locked == 0) {
proc_list_lock();
+ }
oldparent = child->p_pptr;
#if __PROC_INTERNAL_DEBUG
- if (oldparent == PROC_NULL)
+ if (oldparent == PROC_NULL) {
panic("proc_reparent: process %p does not have a parent\n", child);
+ }
#endif
LIST_REMOVE(child, p_sibling);
#if __PROC_INTERNAL_DEBUG
- if (oldparent->p_childrencnt == 0)
+ if (oldparent->p_childrencnt == 0) {
panic("process children count already 0\n");
+ }
#endif
oldparent->p_childrencnt--;
-#if __PROC_INTERNAL_DEBUG1
- if (oldparent->p_childrencnt < 0)
+#if __PROC_INTERNAL_DEBUG
+ if (oldparent->p_childrencnt < 0) {
panic("process children count -ve\n");
+ }
#endif
LIST_INSERT_HEAD(&parent->p_children, child, p_sibling);
- parent->p_childrencnt++;
+ parent->p_childrencnt++;
child->p_pptr = parent;
child->p_ppid = parent->p_pid;
proc_list_unlock();
- if ((cansignal != 0) && (initproc == parent) && (child->p_stat == SZOMB))
+ if ((signallable != 0) && (initproc == parent) && (child->p_stat == SZOMB)) {
psignal(initproc, SIGCHLD);
- if (locked == 1)
+ }
+ if (locked == 1) {
proc_list_lock();
+ }
}
/*
* right here.
*/
- ut = get_bsdthread_info(self);
+ ut = get_bsdthread_info(self);
proc_lock(p);
- if ((p->p_lflag & P_LPEXIT) == P_LPEXIT) {
- /*
- * This happens when a parent exits/killed and vfork is in progress
- * other threads. But shutdown code for ex has already called exit1()
- */
+ if ((p->p_lflag & P_LPEXIT) == P_LPEXIT) {
+ /*
+ * This happens when a parent exits/killed and vfork is in progress
+ * other threads. But shutdown code for ex has already called exit1()
+ */
proc_unlock(p);
return;
}
if (forceexit == 0) {
/*
- * parent of a vfork child has already called exit() and the
+ * parent of a vfork child has already called exit() and the
* thread that has vfork in proress terminates. So there is no
* separate address space here and it has already been marked for
* termination. This was never covered before and could cause problems
proc_list_lock();
#if CONFIG_MEMORYSTATUS
- memorystatus_remove(p, TRUE);
+ proc_memorystatus_remove(p);
#endif
LIST_REMOVE(p, p_list);
- LIST_INSERT_HEAD(&zombproc, p, p_list); /* Place onto zombproc. */
+ LIST_INSERT_HEAD(&zombproc, p, p_list); /* Place onto zombproc. */
/* will not be visible via proc_find */
p->p_listflag |= P_LIST_EXITED;
p->p_sigignore = ~0;
proc_unlock(p);
- proc_spinlock(p);
- if (thread_call_cancel(p->p_rcall))
- p->p_ractive--;
-
- while (p->p_ractive > 0) {
- proc_spinunlock(p);
-
- delay(1);
-
- proc_spinlock(p);
- }
- proc_spinunlock(p);
-
- thread_call_free(p->p_rcall);
- p->p_rcall = NULL;
-
ut->uu_siglist = 0;
- vproc_exit(p);
-}
+ /* begin vproc_exit */
-void
-vproc_exit(proc_t p)
-{
proc_t q;
proc_t pp;
-
+
vnode_t tvp;
-#ifdef FIXME
- struct task *task = p->task;
-#endif
+
struct pgrp * pg;
struct session *sessp;
struct rusage_superset *rup;
- /* XXX Zombie allocation may fail, in which case stats get lost */
- MALLOC_ZONE(rup, struct rusage_superset *,
- sizeof (*rup), M_ZOMBIE, M_WAITOK);
+ rup = zalloc(zombie_zone);
proc_refdrain(p);
sessp = proc_session(p);
if (SESS_LEADER(p, sessp)) {
-
- if (sessp->s_ttyvp != NULLVP) {
- struct vnode *ttyvp;
- int ttyvid;
- int cttyflag = 0;
- struct vfs_context context;
- struct tty *tp;
-
- /*
- * Controlling process.
- * Signal foreground pgrp,
- * drain controlling terminal
- * and revoke access to controlling terminal.
- */
- session_lock(sessp);
- tp = SESSION_TP(sessp);
- if ((tp != TTY_NULL) && (tp->t_session == sessp)) {
- session_unlock(sessp);
-
- /*
- * We're going to SIGHUP the foreground process
- * group. It can't change from this point on
- * until the revoke is complete.
- * The process group changes under both the tty
- * lock and proc_list_lock but we need only one
- */
- tty_lock(tp);
- ttysetpgrphup(tp);
- tty_unlock(tp);
-
- tty_pgsignal(tp, SIGHUP, 1);
-
- session_lock(sessp);
- tp = SESSION_TP(sessp);
- }
- cttyflag = sessp->s_flags & S_CTTYREF;
- sessp->s_flags &= ~S_CTTYREF;
- ttyvp = sessp->s_ttyvp;
- ttyvid = sessp->s_ttyvid;
- sessp->s_ttyvp = NULL;
- sessp->s_ttyvid = 0;
- sessp->s_ttyp = TTY_NULL;
- sessp->s_ttypgrpid = NO_PID;
- session_unlock(sessp);
-
- if ((ttyvp != NULLVP) && (vnode_getwithvid(ttyvp, ttyvid) == 0)) {
- if (tp != TTY_NULL) {
- tty_lock(tp);
- (void) ttywait(tp);
- tty_unlock(tp);
- }
- context.vc_thread = proc_thread(p); /* XXX */
- context.vc_ucred = kauth_cred_proc_ref(p);
- VNOP_REVOKE(ttyvp, REVOKEALL, &context);
- if (cttyflag) {
- /*
- * Release the extra usecount taken in cttyopen.
- * usecount should be released after VNOP_REVOKE is called.
- * This usecount was taken to ensure that
- * the VNOP_REVOKE results in a close to
- * the tty since cttyclose is a no-op.
- */
- vnode_rele(ttyvp);
- }
- vnode_put(ttyvp);
- kauth_cred_unref(&context.vc_ucred);
- ttyvp = NULLVP;
- }
- if (tp) {
- /*
- * This is cleared even if not set. This is also done in
- * spec_close to ensure that the flag is cleared.
- */
- tty_lock(tp);
- ttyclrpgrphup(tp);
- tty_unlock(tp);
-
- ttyfree(tp);
- }
- }
- session_lock(sessp);
- sessp->s_leader = NULL;
- session_unlock(sessp);
+ panic("vfork child is session leader");
}
session_rele(sessp);
fixjobc(p, pg, 0);
pg_rele(pg);
- p->p_rlimit[RLIMIT_FSIZE].rlim_cur = RLIM_INFINITY;
+ /*
+ * Change RLIMIT_FSIZE for accounting/debugging. proc_limitsetcur_internal() will COW the current plimit
+ * before making changes if the current plimit is shared. The COW'ed plimit will be freed
+ * below by calling proc_limitdrop().
+ */
+ proc_limitsetcur_internal(p, RLIMIT_FSIZE, RLIM_INFINITY);
proc_list_lock();
+
proc_childdrainstart(p);
while ((q = p->p_children.lh_first) != NULL) {
if (q->p_stat == SZOMB) {
- if (p != q->p_pptr)
+ if (p != q->p_pptr) {
panic("parent child linkage broken");
+ }
/* check for lookups by zomb sysctl */
while ((q->p_listflag & P_LIST_WAITING) == P_LIST_WAITING) {
msleep(&q->p_stat, proc_list_mlock, PWAIT, "waitcoll", 0);
* the reference here exclusively and their can be
* no waiters. So there is no need for a wakeup
* after we are done. AlsO the reap frees the structure
- * and the proc struct cannot be used for wakeups as well.
+ * and the proc struct cannot be used for wakeups as well.
* It is safe to use q here as this is system reap
*/
(void)reap_child_locked(p, q, 1, 0, 1, 0);
} else {
/*
- * Traced processes are killed
- * since their existence means someone is messing up.
- */
+ * Traced processes are killed
+ * since their existence means someone is messing up.
+ */
if (q->p_lflag & P_LTRACED) {
struct proc *opp;
proc_unlock(q);
/*
- * The sigwait_thread could be stopped at a
- * breakpoint. Wake it up to kill.
- * Need to do this as it could be a thread which is not
- * the first thread in the task. So any attempts to kill
- * the process would result into a deadlock on q->sigwait.
- */
+ * The sigwait_thread could be stopped at a
+ * breakpoint. Wake it up to kill.
+ * Need to do this as it could be a thread which is not
+ * the first thread in the task. So any attempts to kill
+ * the process would result into a deadlock on q->sigwait.
+ */
thread_resume(thread);
clear_wait(thread, THREAD_INTERRUPTED);
- threadsignal(thread, SIGKILL, 0);
+ threadsignal(thread, SIGKILL, 0, TRUE);
} else {
proc_unlock(q);
}
* structure, this information is lost.
*/
if (rup != NULL) {
- rup->ru = p->p_stats->p_ru;
- timerclear(&rup->ru.ru_utime);
- timerclear(&rup->ru.ru_stime);
+ rup->ru = p->p_stats->p_ru;
+ timerclear(&rup->ru.ru_utime);
+ timerclear(&rup->ru.ru_stime);
#ifdef FIXME
- if (task) {
- mach_task_basic_info_data_t tinfo;
- task_thread_times_info_data_t ttimesinfo;
- int task_info_stuff, task_ttimes_stuff;
- struct timeval ut,st;
-
- task_info_stuff = MACH_TASK_BASIC_INFO_COUNT;
- task_info(task, MACH_TASK_BASIC_INFO,
- &tinfo, &task_info_stuff);
- p->p_ru->ru.ru_utime.tv_sec = tinfo.user_time.seconds;
- p->p_ru->ru.ru_utime.tv_usec = tinfo.user_time.microseconds;
- p->p_ru->ru.ru_stime.tv_sec = tinfo.system_time.seconds;
- p->p_ru->ru.ru_stime.tv_usec = tinfo.system_time.microseconds;
-
- task_ttimes_stuff = TASK_THREAD_TIMES_INFO_COUNT;
- task_info(task, TASK_THREAD_TIMES_INFO,
- &ttimesinfo, &task_ttimes_stuff);
-
- ut.tv_sec = ttimesinfo.user_time.seconds;
- ut.tv_usec = ttimesinfo.user_time.microseconds;
- st.tv_sec = ttimesinfo.system_time.seconds;
- st.tv_usec = ttimesinfo.system_time.microseconds;
- timeradd(&ut,&p->p_ru->ru.ru_utime,&p->p_ru->ru.ru_utime);
- timeradd(&st,&p->p_ru->ru.ru_stime,&p->p_ru->ru.ru_stime);
- }
+ if (task) {
+ mach_task_basic_info_data_t tinfo;
+ task_thread_times_info_data_t ttimesinfo;
+ int task_info_stuff, task_ttimes_stuff;
+ struct timeval ut, st;
+
+ task_info_stuff = MACH_TASK_BASIC_INFO_COUNT;
+ task_info(task, MACH_TASK_BASIC_INFO,
+ &tinfo, &task_info_stuff);
+ p->p_ru->ru.ru_utime.tv_sec = tinfo.user_time.seconds;
+ p->p_ru->ru.ru_utime.tv_usec = tinfo.user_time.microseconds;
+ p->p_ru->ru.ru_stime.tv_sec = tinfo.system_time.seconds;
+ p->p_ru->ru.ru_stime.tv_usec = tinfo.system_time.microseconds;
+
+ task_ttimes_stuff = TASK_THREAD_TIMES_INFO_COUNT;
+ task_info(task, TASK_THREAD_TIMES_INFO,
+ &ttimesinfo, &task_ttimes_stuff);
+
+ ut.tv_sec = ttimesinfo.user_time.seconds;
+ ut.tv_usec = ttimesinfo.user_time.microseconds;
+ st.tv_sec = ttimesinfo.system_time.seconds;
+ st.tv_usec = ttimesinfo.system_time.microseconds;
+ timeradd(&ut, &p->p_ru->ru.ru_utime, &p->p_ru->ru.ru_utime);
+ timeradd(&st, &p->p_ru->ru.ru_stime, &p->p_ru->ru.ru_stime);
+ }
#endif /* FIXME */
- ruadd(&rup->ru, &p->p_stats->p_cru);
+ ruadd(&rup->ru, &p->p_stats->p_cru);
gather_rusage_info(p, &rup->ri, RUSAGE_INFO_CURRENT);
rup->ri.ri_phys_footprint = 0;
pth_proc_hashdelete(p);
#endif /* PSYNCH */
+ proc_free_realitimer(p);
+
/*
* Other substructures are freed from wait().
*/
- FREE_ZONE(p->p_stats, sizeof *p->p_stats, M_PSTATS);
+ zfree(proc_stats_zone, p->p_stats);
p->p_stats = NULL;
- FREE_ZONE(p->p_sigacts, sizeof *p->p_sigacts, M_SIGACTS);
+ zfree(proc_sigacts_zone, p->p_sigacts);
p->p_sigacts = NULL;
- proc_limitdrop(p, 1);
- p->p_limit = NULL;
+ FREE(p->p_subsystem_root_path, M_SBUF);
+ p->p_subsystem_root_path = NULL;
+
+ proc_limitdrop(p);
/*
* Finish up by terminating the task
if (pp != initproc) {
proc_lock(pp);
pp->si_pid = p->p_pid;
+ pp->p_xhighbits = p->p_xhighbits;
+ p->p_xhighbits = 0;
pp->si_status = p->p_xstat;
pp->si_code = CLD_EXITED;
/*
* the reference here exclusively and their can be
* no waiters. So there is no need for a wakeup
* after we are done. AlsO the reap frees the structure
- * and the proc struct cannot be used for wakeups as well.
+ * and the proc struct cannot be used for wakeups as well.
* It is safe to use p here as this is system reap
*/
(void)reap_child_locked(pp, p, 0, 0, 1, 1);
proc_rele(pp);
}
-
+
/*
* munge_rusage
* LP64 support - long is 64 bits if we are dealing with a 64 bit user
* process. We munge the kernel version of rusage into the
* 64 bit version.
*/
-__private_extern__ void
+__private_extern__ void
munge_user64_rusage(struct rusage *a_rusage_p, struct user64_rusage *a_user_rusage_p)
{
+ /* Zero-out struct so that padding is cleared */
+ bzero(a_user_rusage_p, sizeof(struct user64_rusage));
+
/* timeval changes size, so utime and stime need special handling */
a_user_rusage_p->ru_utime.tv_sec = a_rusage_p->ru_utime.tv_sec;
a_user_rusage_p->ru_utime.tv_usec = a_rusage_p->ru_utime.tv_usec;
}
/* For a 64-bit kernel and 32-bit userspace, munging may be needed */
-__private_extern__ void
+__private_extern__ void
munge_user32_rusage(struct rusage *a_rusage_p, struct user32_rusage *a_user_rusage_p)
{
+ bzero(a_user_rusage_p, sizeof(struct user32_rusage));
+
/* timeval changes size, so utime and stime need special handling */
- a_user_rusage_p->ru_utime.tv_sec = a_rusage_p->ru_utime.tv_sec;
+ a_user_rusage_p->ru_utime.tv_sec = (user32_time_t)a_rusage_p->ru_utime.tv_sec;
a_user_rusage_p->ru_utime.tv_usec = a_rusage_p->ru_utime.tv_usec;
- a_user_rusage_p->ru_stime.tv_sec = a_rusage_p->ru_stime.tv_sec;
+ a_user_rusage_p->ru_stime.tv_sec = (user32_time_t)a_rusage_p->ru_stime.tv_sec;
a_user_rusage_p->ru_stime.tv_usec = a_rusage_p->ru_stime.tv_usec;
/*
* everything else can be a direct assign. We currently ignore
* the loss of precision
*/
- a_user_rusage_p->ru_maxrss = a_rusage_p->ru_maxrss;
- a_user_rusage_p->ru_ixrss = a_rusage_p->ru_ixrss;
- a_user_rusage_p->ru_idrss = a_rusage_p->ru_idrss;
- a_user_rusage_p->ru_isrss = a_rusage_p->ru_isrss;
- a_user_rusage_p->ru_minflt = a_rusage_p->ru_minflt;
- a_user_rusage_p->ru_majflt = a_rusage_p->ru_majflt;
- a_user_rusage_p->ru_nswap = a_rusage_p->ru_nswap;
- a_user_rusage_p->ru_inblock = a_rusage_p->ru_inblock;
- a_user_rusage_p->ru_oublock = a_rusage_p->ru_oublock;
- a_user_rusage_p->ru_msgsnd = a_rusage_p->ru_msgsnd;
- a_user_rusage_p->ru_msgrcv = a_rusage_p->ru_msgrcv;
- a_user_rusage_p->ru_nsignals = a_rusage_p->ru_nsignals;
- a_user_rusage_p->ru_nvcsw = a_rusage_p->ru_nvcsw;
- a_user_rusage_p->ru_nivcsw = a_rusage_p->ru_nivcsw;
+ a_user_rusage_p->ru_maxrss = (user32_long_t)a_rusage_p->ru_maxrss;
+ a_user_rusage_p->ru_ixrss = (user32_long_t)a_rusage_p->ru_ixrss;
+ a_user_rusage_p->ru_idrss = (user32_long_t)a_rusage_p->ru_idrss;
+ a_user_rusage_p->ru_isrss = (user32_long_t)a_rusage_p->ru_isrss;
+ a_user_rusage_p->ru_minflt = (user32_long_t)a_rusage_p->ru_minflt;
+ a_user_rusage_p->ru_majflt = (user32_long_t)a_rusage_p->ru_majflt;
+ a_user_rusage_p->ru_nswap = (user32_long_t)a_rusage_p->ru_nswap;
+ a_user_rusage_p->ru_inblock = (user32_long_t)a_rusage_p->ru_inblock;
+ a_user_rusage_p->ru_oublock = (user32_long_t)a_rusage_p->ru_oublock;
+ a_user_rusage_p->ru_msgsnd = (user32_long_t)a_rusage_p->ru_msgsnd;
+ a_user_rusage_p->ru_msgrcv = (user32_long_t)a_rusage_p->ru_msgrcv;
+ a_user_rusage_p->ru_nsignals = (user32_long_t)a_rusage_p->ru_nsignals;
+ a_user_rusage_p->ru_nvcsw = (user32_long_t)a_rusage_p->ru_nvcsw;
+ a_user_rusage_p->ru_nivcsw = (user32_long_t)a_rusage_p->ru_nivcsw;
+}
+
+void
+kdp_wait4_find_process(thread_t thread, __unused event64_t wait_event, thread_waitinfo_t *waitinfo)
+{
+ assert(thread != NULL);
+ assert(waitinfo != NULL);
+
+ struct uthread *ut = get_bsdthread_info(thread);
+ waitinfo->context = 0;
+ // ensure wmesg is consistent with a thread waiting in wait4
+ assert(!strcmp(ut->uu_wmesg, "waitcoll") || !strcmp(ut->uu_wmesg, "wait"));
+ struct wait4_nocancel_args *args = ut->uu_save.uus_wait4_data.args;
+ // May not actually contain a pid; this is just the argument to wait4.
+ // See man wait4 for other valid wait4 arguments.
+ waitinfo->owner = args->pid;
+}
+
+#if __has_feature(ptrauth_calls)
+int
+exit_with_pac_exception(proc_t p, exception_type_t exception, mach_exception_code_t code,
+ mach_exception_subcode_t subcode)
+{
+ thread_t self = current_thread();
+ struct uthread *ut = get_bsdthread_info(self);
+
+ os_reason_t exception_reason = os_reason_create(OS_REASON_PAC_EXCEPTION, (uint64_t)code);
+ assert(exception_reason != OS_REASON_NULL);
+ exception_reason->osr_flags |= OS_REASON_FLAG_GENERATE_CRASH_REPORT;
+ ut->uu_exception = exception;
+ ut->uu_code = code;
+ ut->uu_subcode = subcode;
+
+ return exit_with_reason(p, W_EXITCODE(0, SIGKILL), (int *)NULL, TRUE, FALSE,
+ 0, exception_reason);
}
+#endif /* __has_feature(ptrauth_calls) */
projects / apple / xnu.git / blobdiff