+++ /dev/null
-/*
- +----------------------------------------------------------------------+
- | APC |
- +----------------------------------------------------------------------+
- | Copyright (c) 2008 The PHP Group |
- +----------------------------------------------------------------------+
- | This source file is subject to version 3.01 of the PHP license, |
- | that is bundled with this package in the file LICENSE, and is |
- | available through the world-wide-web at the following url: |
- | http://www.php.net/license/3_01.txt |
- | If you did not receive a copy of the PHP license and are unable to |
- | obtain it through the world-wide-web, please send a note to |
- | license@php.net so we can mail you a copy immediately. |
- +----------------------------------------------------------------------+
- | Authors: Lucas Nealan <lucas@php.net> |
- +----------------------------------------------------------------------+
-
- This software was contributed to PHP by Facebook Inc. in 2007.
-
- Future revisions and derivatives of this source code must acknowledge
- Facebook Inc. as the original contributor of this module by leaving
- this note intact in the source code.
-
- All other licensing and usage conditions are those of the PHP Group.
- */
-
- /* $Id: apc_signal.c,v 1.2.2.3 2008/05/11 18:57:00 rasmus Exp $ */
-
- /* Allows apc to install signal handlers and maintain signalling
- to already registered handlers. Registers all signals that
- coredump by default and unmaps the shared memory segment
- before the coredump. Note: PHP module init is called before
- signals are set by Apache and thus apc_set_signals should
- be called in request init (RINIT)
- */
-
-#include <signal.h>
-#include "apc_globals.h"
-#include "apc_sma.h"
-#include "apc_signal.h"
-
-static apc_signal_info_t apc_signal_info = {0};
-
-static int apc_register_signal(int signo, void (*handler)(int, siginfo_t*, void*));
-static void apc_rehandle_signal(int signo, siginfo_t *siginfo, void *context);
-static void apc_core_unmap(int signo, siginfo_t *siginfo, void *context);
-
-/* {{{ apc_core_unmap
- * Coredump signal handler, unmaps shm and calls previously installed handlers
- */
-static void apc_core_unmap(int signo, siginfo_t *siginfo, void *context)
-{
- apc_sma_cleanup();
- apc_rehandle_signal(signo, siginfo, context);
-
-#if !defined(WIN32) && !defined(NETWARE)
- kill(getpid(), signo);
-#else
- raise(signo);
-#endif
-} /* }}} */
-
-/* {{{ apc_rehandle_signal
- * Call the previously registered handler for a signal
- */
-static void apc_rehandle_signal(int signo, siginfo_t *siginfo, void *context)
-{
- int i;
- apc_signal_entry_t p_sig = {0};
-
- for (i=0; (i < apc_signal_info.installed && p_sig.signo != signo); i++) {
- p_sig = *apc_signal_info.prev[i];
- if (p_sig.signo == signo) {
- if (p_sig.siginfo) {
- (*(void (*)(int, siginfo_t*, void*))p_sig.handler)(signo, siginfo, context);
- } else {
- (*(void (*)(int))p_sig.handler)(signo);
- }
- }
- }
-
-} /* }}} */
-
-/* {{{ apc_register_signal
- * Set a handler for a previously installed signal and save so we can
- * callback when handled
- */
-static int apc_register_signal(int signo, void (*handler)(int, siginfo_t*, void*))
-{
-#if HAVE_SIGACTION
- struct sigaction sa = {{0}};
- apc_signal_entry_t p_sig = {0};
-
- if (sigaction(signo, NULL, &sa) == 0) {
- if ((void*)sa.sa_handler == (void*)handler) {
- return SUCCESS;
- }
-
- if (sa.sa_handler != SIG_ERR && sa.sa_handler != SIG_DFL && sa.sa_handler != SIG_IGN) {
- p_sig.signo = signo;
- p_sig.siginfo = ((sa.sa_flags & SA_SIGINFO) == SA_SIGINFO);
- p_sig.handler = (void *)sa.sa_handler;
-
- apc_signal_info.prev = (apc_signal_entry_t **)apc_erealloc(apc_signal_info.prev, (apc_signal_info.installed+1)*sizeof(apc_signal_entry_t *));
- apc_signal_info.prev[apc_signal_info.installed] = (apc_signal_entry_t *)apc_emalloc(sizeof(apc_signal_entry_t));
- *apc_signal_info.prev[apc_signal_info.installed++] = p_sig;
- } else {
- /* inherit flags and mask if already set */
- sigemptyset(&sa.sa_mask);
- sa.sa_flags = 0;
- sa.sa_flags |= SA_SIGINFO; /* we'll use a siginfo handler */
-#if defined(SA_ONESHOT)
- sa.sa_flags = SA_ONESHOT;
-#elif defined(SA_RESETHAND)
- sa.sa_flags = SA_RESETHAND;
-#endif
- }
- sa.sa_handler = (void*)handler;
-
- if (sigaction(signo, &sa, NULL) < 0) {
- apc_wprint("Error installing apc signal handler for %d", signo);
- }
-
- return SUCCESS;
- }
-#endif
- return FAILURE;
-} /* }}} */
-
-/* {{{ apc_set_signals
- * Install our signal handlers */
-void apc_set_signals(TSRMLS_D)
-{
- if (APCG(coredump_unmap) && apc_signal_info.installed == 0) {
- /* ISO C standard signals that coredump */
- apc_register_signal(SIGSEGV, apc_core_unmap);
- apc_register_signal(SIGABRT, apc_core_unmap);
- apc_register_signal(SIGFPE, apc_core_unmap);
- apc_register_signal(SIGILL, apc_core_unmap);
- /* extended signals that coredump */
-#ifdef SIGBUS
- apc_register_signal(SIGBUS, apc_core_unmap);
-#endif
-#ifdef SIGABORT
- apc_register_signal(SIGABORT, apc_core_unmap);
-#endif
-#ifdef SIGEMT
- apc_register_signal(SIGEMT, apc_core_unmap);
-#endif
-#ifdef SIGIOT
- apc_register_signal(SIGIOT, apc_core_unmap);
-#endif
-#ifdef SIGQUIT
- apc_register_signal(SIGQUIT, apc_core_unmap);
-#endif
-#ifdef SIGSYS
- apc_register_signal(SIGSYS, apc_core_unmap);
-#endif
-#ifdef SIGTRAP
- apc_register_signal(SIGTRAP, apc_core_unmap);
-#endif
-#ifdef SIGXCPU
- apc_register_signal(SIGXCPU, apc_core_unmap);
-#endif
-#ifdef SIGXFSZ
- apc_register_signal(SIGXFSZ, apc_core_unmap);
-#endif
- }
-} /* }}} */
-
-/* {{{ apc_set_signals
- * cleanup signals for shutdown */
-void apc_shutdown_signals()
-{
- int i=0;
- if (apc_signal_info.installed > 0) {
- for (i=0; (i < apc_signal_info.installed); i++) {
- apc_efree(apc_signal_info.prev[i]);
- }
- apc_efree(apc_signal_info.prev);
- apc_signal_info.installed = 0; /* just in case */
- }
-}
-
-/*
- * Local variables:
- * tab-width: 4
- * c-basic-offset: 4
- * End:
- * vim600: expandtab sw=4 ts=4 sts=4 fdm=marker
- * vim<600: expandtab sw=4 ts=4 sts=4
- */
projects / php5-apc.git / blobdiff