/*
- * Copyright (c) 2000-2007 Apple Inc. All rights reserved.
+ * Copyright (c) 2000-2011, 2015 Apple Inc. All rights reserved.
*
* @APPLE_OSREFERENCE_LICENSE_HEADER_START@
*
#include <sys/malloc.h>
#include <sys/resourcevar.h>
#include <sys/ptrace.h>
+#include <sys/proc_info.h>
+#include <sys/_types/_timeval64.h>
#include <sys/user.h>
#include <sys/aio_kern.h>
#include <sys/sysproto.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>
+#if VM_PRESSURE_EVENTS
+#include <kern/vm_pressure.h>
+#endif
+
+#if CONFIG_MEMORYSTATUS
+#include <sys/kern_memorystatus.h>
+#endif
+
#if CONFIG_DTRACE
/* Do not include dtrace.h, it redefines kmem_[alloc/free] */
extern void (*dtrace_fasttrap_exit_ptr)(proc_t);
#include <mach/task.h>
#include <mach/thread_act.h>
+#include <vm/vm_protos.h>
+
#include <sys/sdt.h>
-extern char init_task_failure_data[];
-void proc_prepareexit(proc_t p, int rv);
+extern boolean_t init_task_died;
+void proc_prepareexit(proc_t p, int rv, boolean_t perf_notify);
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 locked, int droplock);
+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 __attribute__((noinline)) void launchd_crashed_panic(proc_t p, int rv);
+extern void proc_piduniqidentifierinfo(proc_t p, struct proc_uniqidentifierinfo *p_uniqidinfo);
+
/*
* Things which should have prototypes in headers, but don't
*/
-void *get_bsduthreadarg(thread_t);
void proc_exit(proc_t p);
int wait1continue(int result);
int waitidcontinue(int result);
-int *get_bsduthreadrval(thread_t);
kern_return_t sys_perf_notify(thread_t thread, int pid);
-kern_return_t abnormal_exit_notify(mach_exception_data_type_t code,
- mach_exception_data_type_t subcode);
+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);
-
+void gather_rusage_info(proc_t p, rusage_info_current *ru, int flavor);
+
/*
* NOTE: Source and target may *NOT* overlap!
* XXX Should share code with bsd/dev/ppc/unix_signal.c
*/
-static void
+void
siginfo_user_to_user32(user_siginfo_t *in, user32_siginfo_t *out)
{
out->si_signo = in->si_signo;
out->si_band = in->si_band; /* range reduction */
}
-static void
+void
siginfo_user_to_user64(user_siginfo_t *in, user64_siginfo_t *out)
{
out->si_signo = in->si_signo;
out->si_band = in->si_band; /* range reduction */
}
+static int
+copyoutsiginfo(user_siginfo_t *native, boolean_t is64, user_addr_t uaddr)
+{
+ if (is64) {
+ user64_siginfo_t sinfo64;
+
+ bzero(&sinfo64, sizeof (sinfo64));
+ siginfo_user_to_user64(native, &sinfo64);
+ return (copyout(&sinfo64, uaddr, sizeof (sinfo64)));
+ } else {
+ user32_siginfo_t sinfo32;
+
+ bzero(&sinfo32, sizeof (sinfo32));
+ siginfo_user_to_user32(native, &sinfo32);
+ return (copyout(&sinfo32, uaddr, sizeof (sinfo32)));
+ }
+}
+
+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)
+{
+ 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 = thread_tid(current_thread());
+ unsigned int pflags = 0;
+
+#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));
+ }
+
+ 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));
+ }
+
+ 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));
+ }
+
+ 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));
+ }
+
+ 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));
+ }
+
+ 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));
+ }
+
+ 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));
+ }
+
+ 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));
+ }
+
+ 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));
+ }
+
+ 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));
+ }
+
+ 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));
+ }
+
+ 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));
+ }
+
+ if (KERN_SUCCESS == kcdata_get_memory_addr(crash_info_ptr, TASK_CRASHINFO_PROC_PATH, MAXPATHLEN, &uaddr)) {
+ proc_pidpathinfo(p, 0, uaddr, MAXPATHLEN, &retval);
+ }
+
+ 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));
+ }
+
+ 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));
+ }
+
+ 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));
+ }
+
+ 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)) {
+ copyout(&cputype, uaddr, sizeof(cpu_type_t));
+ }
+
+ 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));
+ }
+ }
+
+ 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));
+ }
+
+#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));
+ }
+#endif
+
+}
+
+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));
+
+#if (DEVELOPMENT || DEBUG)
+ /*
+ * 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
+
+ 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" : ""));
+}
+
/*
* exit --
* Death of process.
{
exit1(p, W_EXITCODE(uap->rval, 0), retval);
- /* drop funnel before we return */
thread_exception_return();
/* NOTREACHED */
while (TRUE)
*/
int
exit1(proc_t p, int rv, int *retval)
+{
+ return exit1_internal(p, rv, retval, TRUE, TRUE, 0);
+}
+
+int
+exit1_internal(proc_t p, int rv, int *retval, boolean_t thread_can_terminate, boolean_t perf_notify,
+ int jetsam_flags)
{
thread_t self = current_thread();
struct task *task = p->task;
struct uthread *ut;
+ int error = 0;
/*
* If a thread in this task has already
ut = get_bsdthread_info(self);
if (ut->uu_flag & UT_VFORK) {
- vfork_exit(p, rv);
- vfork_return(p , retval, p->p_pid);
- unix_syscall_return(0);
- /* NOT REACHED */
+ if (!thread_can_terminate) {
+ return EINVAL;
+ }
+
+ vfork_exit(p, rv);
+ vfork_return(p , retval, p->p_pid);
+ unix_syscall_return(0);
+ /* NOT REACHED */
}
/*
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_lock(p);
- proc_transstart(p, 1);
+ error = proc_transstart(p, 1, ((jetsam_flags & P_JETSAM_VNODE) ? 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.
+ */
+ proc_unlock(p);
+ 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);
+ }
+ }
+
while (p->exit_thread != self) {
if (sig_try_locked(p) <= 0) {
proc_transend(p, 1);
return(0);
}
proc_unlock(p);
+
thread_terminate(self);
+ if (!thread_can_terminate) {
+ return 0;
+ }
+
thread_exception_return();
/* NOTREACHED */
}
sig_lock_to_exit(p);
}
- if (p == initproc) {
- proc_unlock(p);
- printf("pid 1 exited (signal %d, exit %d)",
- WTERMSIG(rv), WEXITSTATUS(rv));
- panic("%s died\nState at Last Exception:\n\n%s",
- (p->p_comm[0] != '\0' ?
- p->p_comm :
- "launchd"),
- init_task_failure_data);
- }
+ if (p == initproc && current_proc() == p) {
+ init_task_died = TRUE;
+ }
+
p->p_lflag |= P_LEXIT;
p->p_xstat = rv;
+ p->p_lflag |= jetsam_flags;
proc_transend(p, 1);
proc_unlock(p);
- proc_prepareexit(p, rv);
+ proc_prepareexit(p, rv, perf_notify);
/* Last thread to terminate will call proc_exit() */
task_terminate_internal(task);
}
void
-proc_prepareexit(proc_t p, int rv)
+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 (p == initproc) {
+ launchd_crashed_panic(p, rv);
+ /* NOTREACHED */
+ }
/* If a core should be generated, notify crash reporter */
if (hassigprop(WTERMSIG(rv), SA_CORE) || ((p->p_csflags & CS_KILLED) != 0)) {
((ut->uu_exception & 0x0f) << 20) |
((int)ut->uu_code & 0xfffff);
subcode = ut->uu_subcode;
- (void) abnormal_exit_notify(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:
- /* Notify the perf server */
- (void)sys_perf_notify(self, p->p_pid);
+ /* Notify the perf server? */
+ if (perf_notify) {
+ (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(current_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;
+ } 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);
+ }
+ }
+
+ /*
+ * Before this process becomes a zombie, stash resource usage
+ * stats in the proc for external observers to query
+ * via proc_pid_rusage().
+ *
+ * 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();
+ /*
+ * Make the rusage_info visible to external observers
+ * only after it has been completely filled in.
+ */
+ p->p_ru = rup;
+ }
+ if (create_corpse) {
+ populate_corpse_crashinfo(p, task_get_corpseinfo(current_task()), rup, code, subcode);
+ }
/*
* 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);
+#endif
+
LIST_REMOVE(p, p_list);
LIST_INSERT_HEAD(&zombproc, p, p_list); /* Place onto zombproc. */
/* will not be visible via proc_find */
struct uthread * uth;
pid_t pid;
int exitval;
+ int knote_hint;
- uth = (struct uthread *)get_bsdthread_info(current_thread());
+ uth = current_uthread();
proc_lock(p);
- proc_transstart(p, 1);
+ proc_transstart(p, 1, 0);
if( !(p->p_lflag & P_LEXIT)) {
/*
* This can happen if a thread_terminate() occurs
p->p_lflag |= P_LEXIT;
proc_transend(p, 1);
proc_unlock(p);
- proc_prepareexit(p, 0);
+ proc_prepareexit(p, 0, TRUE);
(void) task_terminate_internal(task);
proc_lock(p);
} else {
proc_unlock(p);
pid = p->p_pid;
exitval = p->p_xstat;
- KERNEL_DEBUG_CONSTANT(BSDDBG_CODE(DBG_BSD_PROC, BSD_PROC_EXIT) | DBG_FUNC_START,
- pid, exitval, 0, 0, 0);
+ 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
/*
proc_unlock(p);
#endif
- /* XXX Zombie allocation may fail, in which case stats get lost */
- MALLOC_ZONE(p->p_ru, struct rusage *,
- sizeof (*p->p_ru), M_ZOMBIE, M_WAITOK);
-
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!
proc_refdrain(p);
+ /* if any pending cpu limits action, clear it */
+ task_clear_cpuusage(p->task, TRUE);
+
workqueue_mark_exiting(p);
workqueue_exit(p);
+ kqueue_dealloc(p->p_wqkqueue);
+ p->p_wqkqueue = NULL;
_aio_exit( p );
* no need to throttle this thread since its going away
* but we do need to update our bookeeping w/r to throttled threads
*/
- throttle_lowpri_io(FALSE);
+ throttle_lowpri_io(0);
}
#if SYSV_SHM
if (sessp->s_ttyvp != NULLVP) {
struct vnode *ttyvp;
int ttyvid;
+ int cttyflag = 0;
struct vfs_context context;
- struct tty * tp;
-
+ struct tty *tp;
/*
* Controlling process.
* drain controlling terminal
* and revoke access to controlling terminal.
*/
+ session_lock(sessp);
tp = SESSION_TP(sessp);
-
if ((tp != TTY_NULL) && (tp->t_session == sessp)) {
- tty_pgsignal(tp, SIGHUP, 1);
-
- session_lock(sessp);
- /* reget potentially tp due to revocation */
- tp = SESSION_TP(sessp);
- ttyvp = sessp->s_ttyvp;
- ttyvid = sessp->s_ttyvid;
- sessp->s_ttyvp = NULLVP;
- 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)) {
+ /*
+ * 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);
- 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);
- vnode_put(ttyvp);
- kauth_cred_unref(&context.vc_ucred);
- }
- } else {
session_lock(sessp);
- /* reget potentially tp due to revocation */
tp = SESSION_TP(sessp);
- ttyvp = sessp->s_ttyvp;
- sessp->s_ttyvp = NULLVP;
- sessp->s_ttyvid = 0;
- sessp->s_ttyp = TTY_NULL;
- sessp->s_ttypgrpid = NO_PID;
- session_unlock(sessp);
}
- if (ttyvp)
- vnode_rele(ttyvp);
- /*
- * s_ttyp is not zero'd; we use this to indicate
- * that the session once had a controlling terminal.
- * (for logging and informational purposes)
- */
+ cttyflag = sessp->s_flags & S_CTTYREF;
+ sessp->s_flags &= ~S_CTTYREF;
+ ttyvp = sessp->s_ttyvp;
+ ttyvid = sessp->s_ttyvid;
+ sessp->s_ttyvp = NULLVP;
+ 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);
/* wait till parentrefs are dropped and grant no more */
proc_childdrainstart(p);
while ((q = p->p_children.lh_first) != NULL) {
- q->p_listflag |= P_LIST_DEADPARENT;
+ int reparentedtoinit = (q->p_listflag & P_LIST_DEADPARENT) ? 1 : 0;
if (q->p_stat == SZOMB) {
if (p != q->p_pptr)
panic("parent child linkage broken");
* 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, 1, 0);
+ (void)reap_child_locked(p, q, 1, reparentedtoinit, 1, 0);
} else {
- proc_reparentlocked(q, initproc, 0, 1);
/*
* Traced processes are killed
* since their existence means someone is messing up.
*/
if (q->p_lflag & P_LTRACED) {
+ struct proc *opp;
+
/*
* Take a reference on the child process to
* ensure it doesn't exit and disappear between
continue;
proc_list_unlock();
+
+ opp = proc_find(q->p_oppid);
+ if (opp != PROC_NULL) {
+ proc_list_lock();
+ q->p_oppid = 0;
+ proc_list_unlock();
+ proc_reparentlocked(q, opp, 0, 0);
+ proc_rele(opp);
+ } else {
+ /* original parent exited while traced */
+ proc_list_lock();
+ q->p_listflag |= P_LIST_DEADPARENT;
+ q->p_oppid = 0;
+ proc_list_unlock();
+ proc_reparentlocked(q, initproc, 0, 0);
+ }
+
proc_lock(q);
q->p_lflag &= ~P_LTRACED;
+
if (q->sigwait_thread) {
thread_t thread = q->sigwait_thread;
psignal(q, SIGKILL);
proc_list_lock();
proc_rele_locked(q);
+ } else {
+ q->p_listflag |= P_LIST_DEADPARENT;
+ proc_reparentlocked(q, initproc, 0, 1);
}
}
}
* info and self times. If we were unable to allocate a zombie
* structure, this information is lost.
*/
- /* No need for locking here as no one than this thread can access this */
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 = p->p_stats->p_ru;
+ p->p_ru->ru = p->p_stats->p_ru;
- ruadd(p->p_ru, &p->p_stats->p_cru);
+ ruadd(&(p->p_ru->ru), &p->p_stats->p_cru);
}
/*
proc_limitdrop(p, 1);
p->p_limit = NULL;
+ vm_purgeable_disown(p->task);
/*
* Finish up by terminating the task
p->task = TASK_NULL;
set_bsdtask_info(task, NULL);
- /* exit status will be seen by parent process */
- proc_knote(p, NOTE_EXIT | (p->p_xstat & 0xffff));
+ knote_hint = NOTE_EXIT | (p->p_xstat & 0xffff);
+ proc_knote(p, knote_hint);
/* mark the thread as the one that is doing proc_exit
* no need to hold proc lock in uthread_free
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
* zombie to init. If we were unable to allocate a
* zombie structure, this information is lost.
*/
- if (p->p_ru != NULL) {
- proc_lock(pp);
- ruadd(&pp->p_stats->p_cru, p->p_ru);
+ ruadd(&pp->p_stats->p_cru, &p->p_ru->ru);
+#endif /* !3839178 */
+ update_rusage_info_child(&pp->p_stats->ri_child, &p->p_ru->ri);
proc_unlock(pp);
}
-#endif /* !3839178 */
-
+
/* kernel can reap this one, no need to move it to launchd */
proc_list_lock();
p->p_listflag |= P_LIST_DEADPARENT;
proc_list_unlock();
}
- if ((p->p_listflag & P_LIST_DEADPARENT) == 0) {
+ if ((p->p_listflag & P_LIST_DEADPARENT) == 0 || p->p_oppid) {
if (pp != initproc) {
proc_lock(pp);
pp->si_pid = p->p_pid;
* The write is to an int and is coherent. Also parent is
* keyed off of list lock for reaping
*/
- KERNEL_DEBUG_CONSTANT(BSDDBG_CODE(DBG_BSD_PROC, BSD_PROC_EXIT) | DBG_FUNC_END,
- pid, exitval, 0, 0, 0);
+ KERNEL_DEBUG_CONSTANT_IST(KDEBUG_COMMON,
+ 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
* keyed off of list lock for reaping
*/
proc_list_lock();
- KERNEL_DEBUG_CONSTANT(BSDDBG_CODE(DBG_BSD_PROC, BSD_PROC_EXIT) | DBG_FUNC_END,
- pid, exitval, 0, 0, 0);
+ KERNEL_DEBUG_CONSTANT_IST(KDEBUG_COMMON,
+ 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);
* 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, 1, 1);
+ (void)reap_child_locked(pp, p, 1, 0, 1, 1);
/* list lock dropped by reap_child_locked */
}
if (uth->uu_lowpri_window) {
* no need to throttle this thread since its going away
* but we do need to update our bookeeping w/r to throttled threads
*/
- throttle_lowpri_io(FALSE);
+ throttle_lowpri_io(0);
}
proc_rele(pp);
* 1 Process was reaped
*/
static int
-reap_child_locked(proc_t parent, proc_t child, int deadparent, int locked, int droplock)
+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 */
* ptraced can simply be reaped, refer to radar 5677288
* p_oppid -> ptraced
* trace_parent == initproc -> away from launchd
- * P_LIST_DEADPARENT -> came to launchd by reparenting
+ * reparentedtoinit -> came to launchd by reparenting
*/
- if (child->p_oppid && (trace_parent = proc_find(child->p_oppid))
- && !((trace_parent == initproc) && (child->p_lflag & P_LIST_DEADPARENT))) {
+ if (child->p_oppid) {
+ int knote_hint;
+ pid_t oppid;
+
proc_lock(child);
+ oppid = child->p_oppid;
child->p_oppid = 0;
+ knote_hint = NOTE_EXIT | (child->p_xstat & 0xffff);
proc_unlock(child);
- 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_lock(trace_parent);
- trace_parent->si_pid = child->p_pid;
- trace_parent->si_status = child->p_xstat;
- trace_parent->si_code = CLD_CONTINUED;
- trace_parent->si_uid = kauth_cred_getruid(child->p_ucred);
- proc_unlock(trace_parent);
- }
- proc_reparentlocked(child, trace_parent, 1, 0);
- psignal(trace_parent, SIGCHLD);
- proc_list_lock();
- wakeup((caddr_t)trace_parent);
- child->p_listflag &= ~P_LIST_WAITING;
- wakeup(&child->p_stat);
- proc_list_unlock();
- proc_rele(trace_parent);
- if ((locked == 1) && (droplock == 0))
+
+ if ((trace_parent = proc_find(oppid))
+ && !((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_lock(trace_parent);
+ trace_parent->si_pid = child->p_pid;
+ trace_parent->si_status = child->p_xstat;
+ trace_parent->si_code = CLD_CONTINUED;
+ trace_parent->si_uid = kauth_cred_getruid(child->p_ucred);
+ 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();
- return (0);
- }
-
- if (trace_parent != PROC_NULL) {
- proc_rele(trace_parent);
+ wakeup((caddr_t)trace_parent);
+ child->p_listflag &= ~P_LIST_WAITING;
+ wakeup(&child->p_stat);
+ proc_list_unlock();
+ proc_rele(trace_parent);
+ if ((locked == 1) && (droplock == 0))
+ proc_list_lock();
+ return (0);
+ }
+
+ /*
+ * If we can't reparent (e.g. the original parent exited while child was being debugged, or
+ * original parent is the same as the debugger currently exiting), we still need to satisfy
+ * the knote lifecycle for other observers on the system. While the debugger was attached,
+ * the NOTE_EXIT would not have been broadcast during initial child termination.
+ */
+ proc_knote(child, knote_hint);
+
+ if (trace_parent != PROC_NULL) {
+ proc_rele(trace_parent);
+ }
}
+#pragma clang diagnostic push
+#pragma clang diagnostic ignored "-Wdeprecated-declarations"
proc_knote(child, NOTE_REAP);
+#pragma clang diagnostic pop
+
proc_knote_drain(child);
child->p_xstat = 0;
*/
if (!(parent->p_flag & P_NOCLDWAIT))
#endif /* 3839178 */
- ruadd(&parent->p_stats->p_cru, child->p_ru);
+ 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);
child->p_ru = NULL;
* 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
+ (void)chgproccnt(kauth_cred_getruid(child->p_ucred), -1);
/*
* Free up credentials.
proc_checkdeadrefs(child);
nprocs--;
+ if (deadparent) {
+ /*
+ * If a child zombie is being reaped because its parent
+ * is exiting, make sure we update the list flag
+ */
+ child->p_listflag |= P_LIST_DEADPARENT;
+ }
+
proc_list_unlock();
#if CONFIG_FINE_LOCK_GROUPS
int
wait1continue(int result)
{
- void *vt;
+ proc_t p;
thread_t thread;
+ uthread_t uth;
+ struct _wait4_data *wait4_data;
+ struct wait4_nocancel_args *uap;
int *retval;
- proc_t p;
if (result)
return(result);
p = current_proc();
thread = current_thread();
- vt = get_bsduthreadarg(thread);
- retval = get_bsduthreadrval(thread);
- return(wait4(p, (struct wait4_args *)vt, retval));
+ uth = (struct uthread *)get_bsdthread_info(thread);
+
+ wait4_data = &uth->uu_kevent.uu_wait4_data;
+ uap = wait4_data->args;
+ retval = wait4_data->retval;
+ return(wait4_nocancel(p, uap, retval));
}
int
int sibling_count;
proc_t p;
int status, error;
+ uthread_t uth;
+ struct _wait4_data *wait4_data;
AUDIT_ARG(pid, uap->pid);
if (p->p_stat == SZOMB) {
+ int reparentedtoinit = (p->p_listflag & P_LIST_DEADPARENT) ? 1 : 0;
+
proc_list_unlock();
#if CONFIG_MACF
if ((error = mac_proc_check_wait(q, p)) != 0)
} else {
if (IS_64BIT_PROCESS(q)) {
struct user64_rusage my_rusage;
- munge_user64_rusage(p->p_ru, &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;
- munge_user32_rusage(p->p_ru, &my_rusage);
+ munge_user32_rusage(&p->p_ru->ru, &my_rusage);
error = copyout((caddr_t)&my_rusage,
uap->rusage,
sizeof (my_rusage));
*/
if ( sibling_count == 0 ) {
int mask = sigmask(SIGCHLD);
- uthread_t uth = (struct uthread *)get_bsdthread_info(current_thread());
+ uth = current_uthread();
if ( (uth->uu_sigmask & mask) != 0 ) {
/* we are blocking SIGCHLD signals. clear any pending SIGCHLD.
}
/* Clean up */
- (void)reap_child_locked(q, p, 0, 0, 0);
+ (void)reap_child_locked(q, p, 0, reparentedtoinit, 0, 0);
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->args = uap;
+ wait4_data->retval = retval;
+
if ((error = msleep0((caddr_t)q, proc_list_mlock, PWAIT | PCATCH | PDROP, "wait", 0, wait1continue)))
return (error);
return (error);
}
+#if DEBUG
+#define ASSERT_LCK_MTX_OWNED(lock) \
+ lck_mtx_assert(lock, LCK_MTX_ASSERT_OWNED)
+#else
+#define ASSERT_LCK_MTX_OWNED(lock) /* nothing */
+#endif
int
waitidcontinue(int result)
{
- void *vt;
+ proc_t p;
thread_t thread;
+ uthread_t uth;
+ struct _waitid_data *waitid_data;
+ struct waitid_nocancel_args *uap;
int *retval;
if (result)
- return(result);
+ return (result);
+ p = current_proc();
thread = current_thread();
- vt = get_bsduthreadarg(thread);
- retval = get_bsduthreadrval(thread);
- return(waitid(current_proc(), (struct waitid_args *)vt, retval));
+ uth = (struct uthread *)get_bsdthread_info(thread);
+
+ waitid_data = &uth->uu_kevent.uu_waitid_data;
+ uap = waitid_data->args;
+ retval = waitid_data->retval;
+ return(waitid_nocancel(p, uap, retval));
}
/*
*
* Parameters: uap->idtype one of P_PID, P_PGID, P_ALL
* uap->id pid_t or gid_t or ignored
- * uap->infop Address of signinfo_t struct in
+ * uap->infop Address of siginfo_t struct in
* user space into which to return status
* uap->options flag values
*
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)
+waitid_nocancel(proc_t q, struct waitid_nocancel_args *uap,
+ __unused int32_t *retval)
{
- user_siginfo_t collect64; /* 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;
int error;
+ uthread_t uth;
+ struct _waitid_data *waitid_data;
- /*
- * Forced validation of options for T.waitpid 21; should be a TSD!
- * This will pass the test, but note that we have more bits than the
- * standard specifies that we will allow in, in this case. The test
- * passes because they light all the bits, not just the ones we allow,
- * and so the following check returns EINVAL like the test wants.
- */
- if (((uap->options & (WNOHANG|WNOWAIT|WCONTINUED|WUNTRACED|WSTOPPED|WEXITED)) != uap->options) ||
- (uap->options == 0))
+ if (uap->options == 0 ||
+ (uap->options & ~(WNOHANG|WNOWAIT|WCONTINUED|WSTOPPED|WEXITED)))
return (EINVAL); /* bits set that aren't recognized */
- /*
- * Overly critical options checking, per POSIX
- */
- switch(uap->idtype) {
+ 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)
loop1:
nfound = 0;
for (p = q->p_children.lh_first; p != 0; p = p->p_sibling.le_next) {
- switch(uap->idtype) {
+
+ switch (uap->idtype) {
case P_PID: /* child with process ID equal to... */
if (p->p_pid != (pid_t)uap->id)
continue;
* the single return for waited process guarantee.
*/
if (p->p_listflag & P_LIST_WAITING) {
- (void)msleep(&p->p_stat, proc_list_mlock, PWAIT, "waitidcoll", 0);
+ (void) msleep(&p->p_stat, proc_list_mlock,
+ PWAIT, "waitidcoll", 0);
goto loop1;
}
p->p_listflag |= P_LIST_WAITING; /* mark busy */
nfound++;
- /*
- * Types of processes we are interested in
- *
- * XXX Don't know what to do for WCONTINUED?!?
- */
- switch(p->p_stat) {
+ bzero(&siginfo, sizeof (siginfo));
+
+ switch (p->p_stat) {
case SZOMB: /* Exited */
if (!(uap->options & WEXITED))
break;
-
- /* drop the lock and the thread is going to return */
proc_list_unlock();
+#if CONFIG_MACF
+ 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 (WIFSIGNALED(p->p_xstat)) {
+ siginfo.si_code = WCOREDUMP(p->p_xstat) ?
+ CLD_DUMPED : CLD_KILLED;
+ } else
+ siginfo.si_code = CLD_EXITED;
- /* Collect "siginfo" information for caller */
- collect64.si_signo = SIGCHLD;
- collect64.si_code = 0;
- collect64.si_errno = 0;
- collect64.si_pid = 0;
- collect64.si_uid = 0;
- collect64.si_addr = 0;
- collect64.si_status = WEXITSTATUS(p->p_xstat);
- collect64.si_band = 0;
-
- if (IS_64BIT_PROCESS(p)) {
- user64_siginfo_t sinfo64;
-
- siginfo_user_to_user64(&collect64, &sinfo64);
-
- error = copyout((caddr_t)&sinfo64,
- uap->infop,
- sizeof(sinfo64));
- } else {
- user32_siginfo_t sinfo32;
-
- siginfo_user_to_user32(&collect64, &sinfo32);
-
- error = copyout((caddr_t)&sinfo32,
- uap->infop,
- sizeof(sinfo32));
- }
- /* information unavailable? */
- if (error)
+ if ((error = copyoutsiginfo(&siginfo,
+ caller64, uap->infop)) != 0)
goto out;
/* Prevent other process for waiting for this event? */
if (!(uap->options & WNOWAIT)) {
- /* Clean up */
- (void)reap_child_locked(q, p, 0, 0, 0);
- } else {
- proc_list_lock();
- p->p_listflag &= ~P_LIST_WAITING;
- proc_list_unlock();
+ (void) reap_child_locked(q, p, 0, 0, 0, 0);
+ return (0);
}
-
- return (0);
+ goto out;
case SSTOP: /* Stopped */
/*
*/
if ((p->p_lflag & P_LWAITED) != 0)
break;
-
- /* drop the lock and the thread is going to return */
proc_list_unlock();
+#if CONFIG_MACF
+ 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_code = CLD_STOPPED;
- /* Collect "siginfo" information for caller */
- collect64.si_signo = SIGCHLD;
- collect64.si_code = 0;
- collect64.si_errno = 0;
- collect64.si_pid = 0;
- collect64.si_uid = 0;
- collect64.si_addr = 0;
- proc_lock(p);
- collect64.si_status = p->p_xstat;
- proc_unlock(p);
- collect64.si_band = 0;
-
- if (IS_64BIT_PROCESS(p)) {
- user64_siginfo_t sinfo64;
-
- siginfo_user_to_user64(&collect64, &sinfo64);
-
- error = copyout((caddr_t)&sinfo64,
- uap->infop,
- sizeof(sinfo64));
- } else {
- user32_siginfo_t sinfo32;
-
- siginfo_user_to_user32(&collect64, &sinfo32);
-
- error = copyout((caddr_t)&sinfo32,
- uap->infop,
- sizeof(sinfo32));
- }
- /* information unavailable? */
- if (error)
+ if ((error = copyoutsiginfo(&siginfo,
+ caller64, uap->infop)) != 0)
goto out;
/* Prevent other process for waiting for this event? */
p->p_lflag |= P_LWAITED;
proc_unlock(p);
}
-
- error = 0;
goto out;
- default: /* All others */
- /* ...meaning Continued */
+ default: /* All other states => Continued */
if (!(uap->options & WCONTINUED))
break;
*/
if ((p->p_flag & P_CONTINUED) == 0)
break;
-
- /* drop the lock and the thread is going to return */
proc_list_unlock();
-
- /* Collect "siginfo" information for caller */
+#if CONFIG_MACF
+ if ((error = mac_proc_check_wait(q, p)) != 0)
+ goto out;
+#endif
+ siginfo.si_signo = SIGCHLD;
+ siginfo.si_code = CLD_CONTINUED;
proc_lock(p);
- collect64.si_signo = SIGCHLD;
- collect64.si_code = CLD_CONTINUED;
- collect64.si_errno = 0;
- collect64.si_pid = p->p_contproc;
- collect64.si_uid = 0;
- collect64.si_addr = 0;
- collect64.si_status = p->p_xstat;
- collect64.si_band = 0;
+ siginfo.si_pid = p->p_contproc;
+ siginfo.si_status = p->p_xstat;
proc_unlock(p);
- if (IS_64BIT_PROCESS(p)) {
- user64_siginfo_t sinfo64;
-
- siginfo_user_to_user64(&collect64, &sinfo64);
-
- error = copyout((caddr_t)&sinfo64,
- uap->infop,
- sizeof(sinfo64));
- } else {
- user32_siginfo_t sinfo32;
-
- siginfo_user_to_user32(&collect64, &sinfo32);
-
- error = copyout((caddr_t)&sinfo32,
- uap->infop,
- sizeof(sinfo32));
- }
- /* information unavailable? */
- if (error)
+ if ((error = copyoutsiginfo(&siginfo,
+ caller64, uap->infop)) != 0)
goto out;
/* Prevent other process for waiting for this event? */
if (!(uap->options & WNOWAIT)) {
- OSBitAndAtomic(~((uint32_t)P_CONTINUED), &p->p_flag);
+ OSBitAndAtomic(~((uint32_t)P_CONTINUED),
+ &p->p_flag);
}
-
- error = 0;
goto out;
}
- /* LIST LOCK IS HELD HERE */
+ ASSERT_LCK_MTX_OWNED(proc_list_mlock);
+
/* Not a process we are interested in; go on to next child */
-
+
p->p_listflag &= ~P_LIST_WAITING;
wakeup(&p->p_stat);
}
+ ASSERT_LCK_MTX_OWNED(proc_list_mlock);
- /* list lock is always held */
/* No child processes that could possibly satisfy the request? */
+
if (nfound == 0) {
proc_list_unlock();
return (ECHILD);
if (uap->options & WNOHANG) {
proc_list_unlock();
+#if CONFIG_MACF
+ if ((error = mac_proc_check_wait(q, p)) != 0)
+ return (error);
+#endif
+ /*
+ * The state of the siginfo structure in this case
+ * is undefined. Some implementations bzero it, some
+ * (like here) leave it untouched for efficiency.
+ *
+ * Thus the most portable check for "no matching pid with
+ * WNOHANG" is to store a zero into si_pid before
+ * invocation, then check for a non-zero value afterwards.
+ */
return (0);
}
- if ((error = msleep0((caddr_t)q, proc_list_mlock, PWAIT | PCATCH | PDROP, "waitid", 0, waitidcontinue)))
+ /* 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->args = uap;
+ waitid_data->retval = retval;
+
+ if ((error = msleep0(q, proc_list_mlock,
+ PWAIT | PCATCH | PDROP, "waitid", 0, waitidcontinue)) != 0)
return (error);
goto loop;
proc_list_lock();
+#if CONFIG_MEMORYSTATUS
+ memorystatus_remove(p, TRUE);
+#endif
+
LIST_REMOVE(p, p_list);
LIST_INSERT_HEAD(&zombproc, p, p_list); /* Place onto zombproc. */
/* will not be visible via proc_find */
#endif
struct pgrp * pg;
struct session *sessp;
+ struct rusage_superset *rup;
/* XXX Zombie allocation may fail, in which case stats get lost */
- MALLOC_ZONE(p->p_ru, struct rusage *,
- sizeof (*p->p_ru), M_ZOMBIE, M_WAITOK);
-
+ MALLOC_ZONE(rup, struct rusage_superset *,
+ sizeof (*rup), M_ZOMBIE, M_WAITOK);
proc_refdrain(p);
if (sessp->s_ttyvp != NULLVP) {
struct vnode *ttyvp;
int ttyvid;
+ int cttyflag = 0;
struct vfs_context context;
- struct tty * tp;
+ struct tty *tp;
/*
* Controlling process.
* drain controlling terminal
* and revoke access to controlling terminal.
*/
+ session_lock(sessp);
tp = SESSION_TP(sessp);
-
if ((tp != TTY_NULL) && (tp->t_session == sessp)) {
- tty_pgsignal(tp, SIGHUP, 1);
- tty_lock(tp);
- (void) ttywait(tp);
- tty_unlock(tp);
+ session_unlock(sessp);
+
/*
- * The tty could have been revoked
- * if we blocked.
+ * 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);
- /* reget in case of race */
tp = SESSION_TP(sessp);
- 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)) {
- context.vc_thread = proc_thread(p); /* XXX */
- context.vc_ucred = kauth_cred_proc_ref(p);
- VNOP_REVOKE(ttyvp, REVOKEALL, &context);
- vnode_put(ttyvp);
- kauth_cred_unref(&context.vc_ucred);
+ }
+ 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);
}
- } else {
- session_lock(sessp);
- ttyvp = sessp->s_ttyvp;
- sessp->s_ttyvp = NULL;
- sessp->s_ttyvid = 0;
- sessp->s_ttyp = TTY_NULL;
- sessp->s_ttypgrpid = NO_PID;
- session_unlock(sessp);
+ 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 (ttyvp)
- vnode_rele(ttyvp);
- /*
- * s_ttyp is not zero'd; we use this to indicate
- * that the session once had a controlling terminal.
- * (for logging and informational purposes)
- */
- }
+ 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);
proc_list_lock();
proc_childdrainstart(p);
while ((q = p->p_children.lh_first) != NULL) {
- q->p_listflag |= P_LIST_DEADPARENT;
if (q->p_stat == SZOMB) {
if (p != q->p_pptr)
panic("parent child linkage broken");
* 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, 1, 0);
+ (void)reap_child_locked(p, q, 1, 0, 1, 0);
} else {
- proc_reparentlocked(q, initproc, 0, 1);
/*
* Traced processes are killed
* since their existence means someone is messing up.
*/
if (q->p_lflag & P_LTRACED) {
+ struct proc *opp;
+
proc_list_unlock();
+
+ opp = proc_find(q->p_oppid);
+ if (opp != PROC_NULL) {
+ proc_list_lock();
+ q->p_oppid = 0;
+ proc_list_unlock();
+ proc_reparentlocked(q, opp, 0, 0);
+ proc_rele(opp);
+ } else {
+ /* original parent exited while traced */
+ proc_list_lock();
+ q->p_listflag |= P_LIST_DEADPARENT;
+ q->p_oppid = 0;
+ proc_list_unlock();
+ proc_reparentlocked(q, initproc, 0, 0);
+ }
+
proc_lock(q);
q->p_lflag &= ~P_LTRACED;
+
if (q->sigwait_thread) {
thread_t thread = q->sigwait_thread;
psignal(q, SIGKILL);
proc_list_lock();
+ } else {
+ q->p_listflag |= P_LIST_DEADPARENT;
+ proc_reparentlocked(q, initproc, 0, 1);
}
}
}
* info and self times. If we were unable to allocate a zombie
* structure, this information is lost.
*/
- /* No need for locking here as no one than this thread can access this */
- if (p->p_ru != NULL) {
- *p->p_ru = p->p_stats->p_ru;
- timerclear(&p->p_ru->ru_utime);
- timerclear(&p->p_ru->ru_stime);
+ if (rup != NULL) {
+ rup->ru = p->p_stats->p_ru;
+ timerclear(&rup->ru.ru_utime);
+ timerclear(&rup->ru.ru_stime);
#ifdef FIXME
if (task) {
- task_basic_info_data_t tinfo;
+ 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 = TASK_BASIC_INFO_COUNT;
- task_info(task, TASK_BASIC_INFO,
+ task_info_stuff = MACH_TASK_BASIC_INFO_COUNT;
+ task_info(task, MACH_TASK_BASIC_INFO,
&tinfo, &task_info_stuff);
- p->p_ru->ru_utime.tv_sec = tinfo.user_time.seconds;
- p->p_ru->ru_utime.tv_usec = tinfo.user_time.microseconds;
- p->p_ru->ru_stime.tv_sec = tinfo.system_time.seconds;
- p->p_ru->ru_stime.tv_usec = tinfo.system_time.microseconds;
+ 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,
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_utime,&p->p_ru->ru_utime);
- timeradd(&st,&p->p_ru->ru_stime,&p->p_ru->ru_stime);
+ 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(p->p_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;
+ rup->ri.ri_proc_exit_abstime = mach_absolute_time();
+
+ /*
+ * Now that we have filled in the rusage info, make it
+ * visible to an external observer via proc_pid_rusage().
+ */
+ p->p_ru = rup;
}
/*
* 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, 1, 1);
+ (void)reap_child_locked(pp, p, 0, 0, 1, 1);
/* list lock dropped by reap_child_locked */
}
proc_rele(pp);
projects / apple / xnu.git / blobdiff