+++ /dev/null
-/* Licensed to the Apache Software Foundation (ASF) under one or more
- * contributor license agreements. See the NOTICE file distributed with
- * this work for additional information regarding copyright ownership.
- * The ASF licenses this file to You under the Apache License, Version 2.0
- * (the "License"); you may not use this file except in compliance with
- * the License. You may obtain a copy of the License at
- *
- * http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
-#define INCL_DOSEXCEPTIONS /* for OS2 */
-#include "apr_arch_threadproc.h"
-#include "apr_private.h"
-#include "apr_pools.h"
-#include "apr_signal.h"
-#include "apr_strings.h"
-
-#include <assert.h>
-#if APR_HAS_THREADS && APR_HAVE_PTHREAD_H
-#include <pthread.h>
-#endif
-
-APR_DECLARE(apr_status_t) apr_proc_kill(apr_proc_t *proc, int signum)
-{
-#ifdef OS2
- /* SIGTERM's don't work too well in OS/2 (only affects other EMX
- * programs). CGIs may not be, esp. REXX scripts, so use a native
- * call instead
- */
- if (signum == SIGTERM) {
- return APR_OS2_STATUS(DosSendSignalException(proc->pid,
- XCPT_SIGNAL_BREAK));
- }
-#endif /* OS2 */
-
- if (kill(proc->pid, signum) == -1) {
- return errno;
- }
-
- return APR_SUCCESS;
-}
-
-
-#if APR_HAVE_SIGACTION
-
-#ifdef DARWIN
-static void avoid_zombies(int signo)
-{
- int exit_status;
-
- while (waitpid(-1, &exit_status, WNOHANG) > 0) {
- /* do nothing */
- }
-}
-#endif /* DARWIN */
-
-/*
- * Replace standard signal() with the more reliable sigaction equivalent
- * from W. Richard Stevens' "Advanced Programming in the UNIX Environment"
- * (the version that does not automatically restart system calls).
- */
-APR_DECLARE(apr_sigfunc_t *) apr_signal(int signo, apr_sigfunc_t * func)
-{
- struct sigaction act, oact;
-
- act.sa_handler = func;
- sigemptyset(&act.sa_mask);
- act.sa_flags = 0;
-#ifdef SA_INTERRUPT /* SunOS */
- act.sa_flags |= SA_INTERRUPT;
-#endif
-#if defined(__osf__) && defined(__alpha)
- /* XXX jeff thinks this should be enabled whenever SA_NOCLDWAIT is defined */
-
- /* this is required on Tru64 to cause child processes to
- * disappear gracefully - XPG4 compatible
- */
- if ((signo == SIGCHLD) && (func == SIG_IGN)) {
- act.sa_flags |= SA_NOCLDWAIT;
- }
-#endif
-#ifdef DARWIN
- /* ignoring SIGCHLD or leaving the default disposition doesn't avoid zombies,
- * and there is no SA_NOCLDWAIT flag, so catch the signal and reap status in
- * the handler to avoid zombies
- */
- if ((signo == SIGCHLD) && (func == SIG_IGN)) {
- act.sa_handler = avoid_zombies;
- }
-#endif
- if (sigaction(signo, &act, &oact) < 0)
- return SIG_ERR;
- return oact.sa_handler;
-}
-
-#endif /* HAVE_SIGACTION */
-
-/* AC_DECL_SYS_SIGLIST defines either of these symbols depending
- * on the version of autoconf used. */
-#if defined(SYS_SIGLIST_DECLARED) || HAVE_DECL_SYS_SIGLIST
-
-void apr_signal_init(apr_pool_t *pglobal)
-{
-}
-const char *apr_signal_description_get(int signum)
-{
- return sys_siglist[signum];
-}
-
-#else /* !(SYS_SIGLIST_DECLARED || HAVE_DECL_SYS_SIGLIST) */
-
-/* we need to roll our own signal description stuff */
-
-#if defined(NSIG)
-#define APR_NUMSIG NSIG
-#elif defined(_NSIG)
-#define APR_NUMSIG _NSIG
-#elif defined(__NSIG)
-#define APR_NUMSIG __NSIG
-#else
-#define APR_NUMSIG 33 /* breaks on OS/390 with < 33; 32 is o.k. for most */
-#endif
-
-static const char *signal_description[APR_NUMSIG];
-
-#define store_desc(index, string) \
- do { \
- if (index >= APR_NUMSIG) { \
- assert(index < APR_NUMSIG); \
- } \
- else { \
- signal_description[index] = string; \
- } \
- } while (0)
-
-void apr_signal_init(apr_pool_t *pglobal)
-{
- int sig;
-
- store_desc(0, "Signal 0");
-
-#ifdef SIGHUP
- store_desc(SIGHUP, "Hangup");
-#endif
-#ifdef SIGINT
- store_desc(SIGINT, "Interrupt");
-#endif
-#ifdef SIGQUIT
- store_desc(SIGQUIT, "Quit");
-#endif
-#ifdef SIGILL
- store_desc(SIGILL, "Illegal instruction");
-#endif
-#ifdef SIGTRAP
- store_desc(SIGTRAP, "Trace/BPT trap");
-#endif
-#ifdef SIGIOT
- store_desc(SIGIOT, "IOT instruction");
-#endif
-#ifdef SIGABRT
- store_desc(SIGABRT, "Abort");
-#endif
-#ifdef SIGEMT
- store_desc(SIGEMT, "Emulator trap");
-#endif
-#ifdef SIGFPE
- store_desc(SIGFPE, "Arithmetic exception");
-#endif
-#ifdef SIGKILL
- store_desc(SIGKILL, "Killed");
-#endif
-#ifdef SIGBUS
- store_desc(SIGBUS, "Bus error");
-#endif
-#ifdef SIGSEGV
- store_desc(SIGSEGV, "Segmentation fault");
-#endif
-#ifdef SIGSYS
- store_desc(SIGSYS, "Bad system call");
-#endif
-#ifdef SIGPIPE
- store_desc(SIGPIPE, "Broken pipe");
-#endif
-#ifdef SIGALRM
- store_desc(SIGALRM, "Alarm clock");
-#endif
-#ifdef SIGTERM
- store_desc(SIGTERM, "Terminated");
-#endif
-#ifdef SIGUSR1
- store_desc(SIGUSR1, "User defined signal 1");
-#endif
-#ifdef SIGUSR2
- store_desc(SIGUSR2, "User defined signal 2");
-#endif
-#ifdef SIGCLD
- store_desc(SIGCLD, "Child status change");
-#endif
-#ifdef SIGCHLD
- store_desc(SIGCHLD, "Child status change");
-#endif
-#ifdef SIGPWR
- store_desc(SIGPWR, "Power-fail restart");
-#endif
-#ifdef SIGWINCH
- store_desc(SIGWINCH, "Window changed");
-#endif
-#ifdef SIGURG
- store_desc(SIGURG, "urgent socket condition");
-#endif
-#ifdef SIGPOLL
- store_desc(SIGPOLL, "Pollable event occurred");
-#endif
-#ifdef SIGIO
- store_desc(SIGIO, "socket I/O possible");
-#endif
-#ifdef SIGSTOP
- store_desc(SIGSTOP, "Stopped (signal)");
-#endif
-#ifdef SIGTSTP
- store_desc(SIGTSTP, "Stopped");
-#endif
-#ifdef SIGCONT
- store_desc(SIGCONT, "Continued");
-#endif
-#ifdef SIGTTIN
- store_desc(SIGTTIN, "Stopped (tty input)");
-#endif
-#ifdef SIGTTOU
- store_desc(SIGTTOU, "Stopped (tty output)");
-#endif
-#ifdef SIGVTALRM
- store_desc(SIGVTALRM, "virtual timer expired");
-#endif
-#ifdef SIGPROF
- store_desc(SIGPROF, "profiling timer expired");
-#endif
-#ifdef SIGXCPU
- store_desc(SIGXCPU, "exceeded cpu limit");
-#endif
-#ifdef SIGXFSZ
- store_desc(SIGXFSZ, "exceeded file size limit");
-#endif
-
- for (sig = 0; sig < APR_NUMSIG; ++sig)
- if (signal_description[sig] == NULL)
- signal_description[sig] = apr_psprintf(pglobal, "signal #%d", sig);
-}
-
-const char *apr_signal_description_get(int signum)
-{
- return
- signum < APR_NUMSIG
- ? signal_description[signum]
- : "unknown signal (number)";
-}
-
-#endif /* SYS_SIGLIST_DECLARED || HAVE_DECL_SYS_SIGLIST */
-
-#if APR_HAS_THREADS && (HAVE_SIGSUSPEND || APR_HAVE_SIGWAIT) && !defined(OS2)
-
-static void remove_sync_sigs(sigset_t *sig_mask)
-{
-#ifdef SIGABRT
- sigdelset(sig_mask, SIGABRT);
-#endif
-#ifdef SIGBUS
- sigdelset(sig_mask, SIGBUS);
-#endif
-#ifdef SIGEMT
- sigdelset(sig_mask, SIGEMT);
-#endif
-#ifdef SIGFPE
- sigdelset(sig_mask, SIGFPE);
-#endif
-#ifdef SIGILL
- sigdelset(sig_mask, SIGILL);
-#endif
-#ifdef SIGIOT
- sigdelset(sig_mask, SIGIOT);
-#endif
-#ifdef SIGPIPE
- sigdelset(sig_mask, SIGPIPE);
-#endif
-#ifdef SIGSEGV
- sigdelset(sig_mask, SIGSEGV);
-#endif
-#ifdef SIGSYS
- sigdelset(sig_mask, SIGSYS);
-#endif
-#ifdef SIGTRAP
- sigdelset(sig_mask, SIGTRAP);
-#endif
-
-/* the rest of the signals removed from the mask in this function
- * absolutely must be removed; you cannot block synchronous signals
- * (requirement of pthreads API)
- *
- * SIGUSR2 is being removed from the mask for the convenience of
- * Purify users (Solaris, HP-UX, SGI) since Purify uses SIGUSR2
- */
-#ifdef SIGUSR2
- sigdelset(sig_mask, SIGUSR2);
-#endif
-}
-
-APR_DECLARE(apr_status_t) apr_signal_thread(int(*signal_handler)(int signum))
-{
- sigset_t sig_mask;
-#if APR_HAVE_SIGWAIT
- int (*sig_func)(int signum) = (int (*)(int))signal_handler;
-#endif
-
- /* This thread will be the one responsible for handling signals */
- sigfillset(&sig_mask);
-
- /* On certain platforms, sigwait() returns EINVAL if any of various
- * unblockable signals are included in the mask. This was first
- * observed on AIX and Tru64.
- */
-#ifdef SIGKILL
- sigdelset(&sig_mask, SIGKILL);
-#endif
-#ifdef SIGSTOP
- sigdelset(&sig_mask, SIGSTOP);
-#endif
-#ifdef SIGCONT
- sigdelset(&sig_mask, SIGCONT);
-#endif
-#ifdef SIGWAITING
- sigdelset(&sig_mask, SIGWAITING);
-#endif
-
- /* no synchronous signals should be in the mask passed to sigwait() */
- remove_sync_sigs(&sig_mask);
-
- /* On AIX (4.3.3, at least), sigwait() won't wake up if the high-
- * order bit of the second word of flags is turned on. sigdelset()
- * returns an error when trying to turn this off, so we'll turn it
- * off manually.
- *
- * Note that the private fields differ between 32-bit and 64-bit
- * and even between _ALL_SOURCE and !_ALL_SOURCE. Except that on
- * AIX 4.3 32-bit builds and 64-bit builds use the same definition.
- *
- * Applicable AIX fixes such that this is no longer needed:
- *
- * APAR IY23096 for AIX 51B, fix included in AIX 51C, and
- * APAR IY24162 for 43X.
- */
-#if defined(_AIX)
-#if defined(__64BIT__) && defined(_AIXVERSION_510)
-#ifdef _ALL_SOURCE
- sig_mask.ss_set[3] &= 0x7FFFFFFF;
-#else /* not _ALL_SOURCE */
- sig_mask.__ss_set[3] &= 0x7FFFFFFF;
-#endif
-#else /* not 64-bit build, or 64-bit build on 4.3 */
-#ifdef _ALL_SOURCE
- sig_mask.hisigs &= 0x7FFFFFFF;
-#else /* not _ALL_SOURCE */
- sig_mask.__hisigs &= 0x7FFFFFFF;
-#endif
-#endif
-#endif /* _AIX */
-
- while (1) {
-#if APR_HAVE_SIGWAIT
- int signal_received;
-
- if (apr_sigwait(&sig_mask, &signal_received) != 0)
- {
- /* handle sigwait() error here */
- }
-
- if (sig_func(signal_received) == 1) {
- return APR_SUCCESS;
- }
-#elif HAVE_SIGSUSPEND
- sigsuspend(&sig_mask);
-#else
-#error No apr_sigwait() and no sigsuspend()
-#endif
- }
-}
-
-APR_DECLARE(apr_status_t) apr_setup_signal_thread(void)
-{
- sigset_t sig_mask;
- int rv;
-
- /* All threads should mask out signals to be handled by
- * the thread doing sigwait().
- *
- * No thread should ever block synchronous signals.
- * See the Solaris man page for pthread_sigmask() for
- * some information. Solaris chooses to knock out such
- * processes when a blocked synchronous signal is
- * delivered, skipping any registered signal handler.
- * AIX doesn't call a signal handler either. At least
- * one level of linux+glibc does call the handler even
- * when the synchronous signal is blocked.
- */
- sigfillset(&sig_mask);
- remove_sync_sigs(&sig_mask);
-
-#if defined(SIGPROCMASK_SETS_THREAD_MASK)
- if ((rv = sigprocmask(SIG_SETMASK, &sig_mask, NULL)) != 0) {
- rv = errno;
- }
-#else
- if ((rv = pthread_sigmask(SIG_SETMASK, &sig_mask, NULL)) != 0) {
-#ifdef PTHREAD_SETS_ERRNO
- rv = errno;
-#endif
- }
-#endif
- return rv;
-}
-
-#endif
-
-/* Deprecated */
-const char *apr_signal_get_description(int signum)
-{
- return apr_signal_description_get(signum);
-}
Code Review / bottlenecks.git / blobdiff