/*
- * Copyright (c) 2000-2011, 2015 Apple Inc. All rights reserved.
+ * Copyright (c) 2000-2016 Apple Inc. All rights reserved.
*
* @APPLE_OSREFERENCE_LICENSE_HEADER_START@
*
#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 <bsm/audit_kevents.h>
#include <mach/mach_types.h>
+#include <kern/exc_resource.h>
#include <kern/kern_types.h>
#include <kern/kalloc.h>
#include <kern/thread_call.h>
#include <kern/sched_prim.h>
#include <kern/assert.h>
-#include <sys/codesign.h>
+#include <kern/policy_internal.h>
-#if VM_PRESSURE_EVENTS
-#include <kern/vm_pressure.h>
-#endif
+#include <sys/codesign.h>
#if CONFIG_MEMORYSTATUS
#include <sys/kern_memorystatus.h>
#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
#if CONFIG_MACF
#include <security/mac.h>
+#include <security/mac_mach_internal.h>
#include <sys/syscall.h>
#endif
#include <sys/sdt.h>
-extern boolean_t init_task_died;
void proc_prepareexit(proc_t p, int rv, boolean_t perf_notify);
+void gather_populate_corpse_crashinfo(proc_t p, void *crash_info_ptr, mach_exception_data_type_t code, mach_exception_data_type_t subcode, uint64_t *udata_buffer, int num_udata);
+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, void *crash_info_ptr, struct rusage_superset *rup, mach_exception_data_type_t code, mach_exception_data_type_t subcode);
-extern int proc_pidpathinfo(proc_t p, uint64_t arg, user_addr_t buffer, uint32_t buffersize, int32_t *retval);
+static void populate_corpse_crashinfo(proc_t p, void *crash_info_ptr, struct rusage_superset *rup, mach_exception_data_type_t code, mach_exception_data_type_t subcode, uint64_t *udata_buffer, int num_udata);
+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 void 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);
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);
/*
}
}
-static void populate_corpse_crashinfo(proc_t p, void *crash_info_ptr, struct rusage_superset *rup, mach_exception_data_type_t code, mach_exception_data_type_t subcode)
+void gather_populate_corpse_crashinfo(proc_t p, void *crash_info_ptr, mach_exception_data_type_t code, mach_exception_data_type_t subcode, uint64_t *udata_buffer, int num_udata)
+{
+ struct rusage_superset rup;
+
+ gather_rusage_info(p, &rup.ri, RUSAGE_INFO_CURRENT);
+ rup.ri.ri_phys_footprint = 0;
+ populate_corpse_crashinfo(p, crash_info_ptr, &rup, code, subcode, udata_buffer, num_udata);
+}
+
+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, void *crash_info_ptr, struct rusage_superset *rup, mach_exception_data_type_t code, mach_exception_data_type_t subcode, uint64_t *udata_buffer, int num_udata)
{
mach_vm_address_t uaddr = 0;
mach_exception_data_type_t exc_codes[EXCEPTION_CODE_MAX];
int retval = 0;
uint64_t crashed_threadid = thread_tid(current_thread());
unsigned int pflags = 0;
+ uint64_t max_footprint_mb;
+ uint64_t max_footprint;
#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)) {
- copyout(exc_codes, uaddr, sizeof(exc_codes));
+ 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)) {
- copyout(&p->p_pid, uaddr, sizeof(p->p_pid));
+ 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)) {
- copyout(&p->p_ppid, uaddr, sizeof(p->p_ppid));
+ kcdata_memcpy(crash_info_ptr, uaddr, &p->p_ppid, sizeof(p->p_ppid));
}
if (KERN_SUCCESS == kcdata_get_memory_addr(crash_info_ptr, TASK_CRASHINFO_CRASHED_THREADID, sizeof(uint64_t), &uaddr)) {
- copyout(&crashed_threadid, uaddr, sizeof(uint64_t));
- }
-
- if (KERN_SUCCESS == kcdata_get_memory_addr(crash_info_ptr, TASK_CRASHINFO_RUSAGE, sizeof(struct rusage), &uaddr)) {
- copyout(&rup->ru, uaddr, sizeof(struct rusage));
+ kcdata_memcpy(crash_info_ptr, uaddr, &crashed_threadid, sizeof(uint64_t));
}
if (KERN_SUCCESS ==
kcdata_get_memory_addr(crash_info_ptr, TASK_CRASHINFO_BSDINFOWITHUNIQID, sizeof(struct proc_uniqidentifierinfo), &uaddr)) {
proc_piduniqidentifierinfo(p, &p_uniqidinfo);
- copyout(&p_uniqidinfo, uaddr, sizeof(struct proc_uniqidentifierinfo));
+ 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)) {
- copyout(&rup->ri, uaddr, sizeof(rusage_info_current));
+ 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)) {
- copyout(&p->p_csflags, uaddr, sizeof(p->p_csflags));
+ 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)) {
- copyout(&p->p_comm, uaddr, sizeof(p->p_comm));
+ 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;
- copyout(&t64, uaddr, sizeof(t64));
+ 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)) {
- copyout(&p->user_stack, uaddr, sizeof(p->user_stack));
+ 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)) {
- copyout(&p->p_argslen, uaddr, sizeof(p->p_argslen));
+ 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)) {
- copyout(&p->p_argc, uaddr, sizeof(p->p_argc));
+ 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)) {
- proc_pidpathinfo(p, 0, uaddr, MAXPATHLEN, &retval);
+ char *buf = (char *) kalloc(MAXPATHLEN);
+ if (buf != NULL) {
+ bzero(buf, MAXPATHLEN);
+ proc_pidpathinfo_internal(p, 0, buf, MAXPATHLEN, &retval);
+ kcdata_memcpy(crash_info_ptr, uaddr, buf, MAXPATHLEN);
+ kfree(buf, MAXPATHLEN);
+ }
}
pflags = p->p_flag & (P_LP64 | P_SUGID);
if (KERN_SUCCESS == kcdata_get_memory_addr(crash_info_ptr, TASK_CRASHINFO_PROC_FLAGS, sizeof(pflags), &uaddr)) {
- copyout(&pflags, uaddr, sizeof(pflags));
+ 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)) {
- copyout(&p->p_uid, uaddr, sizeof(p->p_uid));
+ 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)) {
- copyout(&p->p_gid, uaddr, sizeof(p->p_gid));
+ kcdata_memcpy(crash_info_ptr, uaddr, &p->p_gid, sizeof(p->p_gid));
}
cputype = cpu_type() & ~CPU_ARCH_MASK;
cputype |= CPU_ARCH_ABI64;
if (KERN_SUCCESS == kcdata_get_memory_addr(crash_info_ptr, TASK_CRASHINFO_CPUTYPE, sizeof(cpu_type_t), &uaddr)) {
- copyout(&cputype, uaddr, sizeof(cpu_type_t));
+ 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));
}
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)) {
- copyout(&pwqinfo, uaddr, sizeof(struct proc_workqueueinfo));
+ 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)) {
- copyout(&p->p_responsible_pid, uaddr, sizeof(p->p_responsible_pid));
+ kcdata_memcpy(crash_info_ptr, uaddr, &p->p_responsible_pid, sizeof(p->p_responsible_pid));
+ }
+
+#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);
if (KERN_SUCCESS == kcdata_get_memory_addr(crash_info_ptr, TASK_CRASHINFO_DIRTY_FLAGS, sizeof(memstat_dirty_flags), &uaddr)) {
- copyout(&memstat_dirty_flags, uaddr, sizeof(memstat_dirty_flags));
+ kcdata_memcpy(crash_info_ptr, uaddr, &memstat_dirty_flags, sizeof(memstat_dirty_flags));
+ }
+#endif
+
+ if (p->p_exit_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 = p->p_exit_reason->osr_namespace,
+ .ers_code = p->p_exit_reason->osr_code,
+ .ers_flags = p->p_exit_reason->osr_flags
+ };
+
+ kcdata_memcpy(crash_info_ptr, uaddr, &ers, sizeof(ers));
+ }
+
+ if (p->p_exit_reason->osr_kcd_buf != 0) {
+ uint32_t reason_buf_size = kcdata_memory_get_used_bytes(&p->p_exit_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, p->p_exit_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);
}
static __attribute__((noinline)) void
launchd_crashed_panic(proc_t p, int rv)
{
- printf("pid 1 exited (signal %d, exit %d)\n",
- WTERMSIG(rv), WEXITSTATUS(rv));
+ char *launchd_exit_reason_desc = launchd_exit_reason_get_string_desc(p->p_exit_reason);
-#if (DEVELOPMENT || DEBUG)
+ 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");
+ }
+
+#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
printf("Generated initproc core file in %d.%03d seconds\n",
(uint32_t)tv_sec, tv_msec);
}
-#endif
+#endif /* (DEVELOPMENT || DEBUG) && CONFIG_COREDUMP */
sync(p, (void *)NULL, (int *)NULL);
- panic_plain("%s exited (signal %d, exit status %d %s)", (p->p_name[0] != '\0' ? p->p_name : "initproc"), WTERMSIG(rv),
- WEXITSTATUS(rv), ((p->p_csflags & CS_KILLED) ? "CS_KILLED" : ""));
+ if (p->p_exit_reason == OS_REASON_NULL) {
+ panic_plain(LAUNCHD_CRASHED_PREFIX " -- no exit reason available -- (signal %d, exit status %d %s)",
+ WTERMSIG(rv), WEXITSTATUS(rv), ((p->p_csflags & CS_KILLED) ? "CS_KILLED" : ""));
+ } else {
+ panic_plain(LAUNCHD_CRASHED_PREFIX " %s -- exit reason namespace %d subcode 0x%llx description: %." LAUNCHD_PANIC_REASON_STRING_MAXLEN "s",
+ ((p->p_csflags & CS_KILLED) ? "CS_KILLED" : ""),
+ p->p_exit_reason->osr_namespace, p->p_exit_reason->osr_code,
+ launchd_exit_reason_desc ? launchd_exit_reason_desc : "none");
+ }
}
+static void
+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)
+{
+ os_reason_t exit_reason = OS_REASON_NULL;
+
+ 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);
+
+ /*
+ * 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);
+
+ return;
+}
+
+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);
+
+ return 0;
+}
+
+
/*
* exit --
* Death of process.
*/
+__attribute__((noreturn))
void
exit(proc_t p, struct exit_args *uap, int *retval)
{
int
exit1_internal(proc_t p, int rv, int *retval, boolean_t thread_can_terminate, boolean_t perf_notify,
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;
*/
ut = get_bsdthread_info(self);
- if (ut->uu_flag & UT_VFORK) {
+ if ((p == current_proc()) &&
+ (ut->uu_flag & UT_VFORK)) {
+ os_reason_free(exit_reason);
if (!thread_can_terminate) {
return EINVAL;
}
* 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,
+ 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_MASK) == P_JETSAM_VNODE) ? 1 : 0));
+ 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);
+ os_reason_free(exit_reason);
if (current_proc() == p){
- if (p->exit_thread == self)
+ 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);
+ }
+
+ 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);
sig_lock_to_exit(p);
}
- if (p == initproc && current_proc() == p) {
- init_task_died = TRUE;
+ 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;
/* NOTREACHED */
}
- /* If a core should be generated, notify crash reporter */
- if (hassigprop(WTERMSIG(rv), SA_CORE) || ((p->p_csflags & CS_KILLED) != 0)) {
+ /*
+ * 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).
/* stash the usage into corpse data if making_corpse == true */
if (create_corpse == TRUE) {
- kr = task_mark_corpse(current_task());
+ 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);
printf("Process[%d] crashed: %s. Too many corpses being created.\n", p->p_pid, p->p_comm);
}
create_corpse = FALSE;
- } else {
- /* XXX: <rdar://problem/20491659> Need to sync ATM buffer before crash */
- kr = task_send_trace_memory(current_task(), p->p_pid, p->p_uniqueid);
}
}
p->p_ru = rup;
}
if (create_corpse) {
- populate_corpse_crashinfo(p, task_get_corpseinfo(current_task()), rup, code, subcode);
+ int est_knotes = 0, num_knotes = 0;
+ uint64_t *buffer = NULL;
+ int buf_size = 0;
+
+ /* 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;
+ }
+ }
+
+ /* Update the code, subcode based on exit reason */
+ proc_update_corpse_exception_codes(p, &code, &subcode);
+ populate_corpse_crashinfo(p, task_get_corpseinfo(p->task), rup, code, subcode, buffer, num_knotes);
+ if (buffer != NULL) {
+ kfree(buffer, buf_size);
+ }
}
/*
* Remove proc from allproc queue and from pidhash chain.
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);
+ dtrace_proc_exit(p);
#endif
nspace_proc_exit(p);
-#if VM_PRESSURE_EVENTS
- vm_pressure_proc_cleanup(p);
-#endif
-
/*
* need to cancel async IO requests that can be cancelled and wait for those
* already active. MAY BLOCK!
*/
thread_resume(thread);
clear_wait(thread, THREAD_INTERRUPTED);
- threadsignal(thread, SIGKILL, 0);
+ threadsignal(thread, SIGKILL, 0, TRUE);
} else {
proc_unlock(q);
}
}
}
- 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().
#endif
(void)chgproccnt(kauth_cred_getruid(child->p_ucred), -1);
+ os_reason_free(child->p_exit_reason);
+
/*
* Free up credentials.
*/
#if CONFIG_FINE_LOCK_GROUPS
lck_mtx_destroy(&child->p_mlock, proc_mlock_grp);
lck_mtx_destroy(&child->p_fdmlock, proc_fdmlock_grp);
+ lck_mtx_destroy(&child->p_ucred_mlock, proc_ucred_mlock_grp);
#if CONFIG_DTRACE
lck_mtx_destroy(&child->p_dtrace_sprlock, proc_lck_grp);
#endif
#else /* CONFIG_FINE_LOCK_GROUPS */
lck_mtx_destroy(&child->p_mlock, proc_lck_grp);
lck_mtx_destroy(&child->p_fdmlock, proc_lck_grp);
+ lck_mtx_destroy(&child->p_ucred_mlock, 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))
nfound = 0;
sibling_count = 0;
- for (p = q->p_children.lh_first; p != 0; p = p->p_sibling.le_next) {
+ PCHILDREN_FOREACH(q, p) {
if ( p->p_sibling.le_next != 0 )
sibling_count++;
if (uap->pid != WAIT_ANY &&
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)
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;
+ proc_free_realitimer(p);
ut->uu_siglist = 0;
*/
thread_resume(thread);
clear_wait(thread, THREAD_INTERRUPTED);
- threadsignal(thread, SIGKILL, 0);
+ threadsignal(thread, SIGKILL, 0, TRUE);
} else {
proc_unlock(q);
}
projects / apple / xnu.git / blobdiff