mirror of
https://github.com/php/php-src.git
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141 lines
4.2 KiB
C
141 lines
4.2 KiB
C
/*
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+----------------------------------------------------------------------+
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| Copyright (c) The PHP Group |
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+----------------------------------------------------------------------+
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| This source file is subject to version 3.01 of the PHP license, |
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| that is bundled with this package in the file LICENSE, and is |
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| available through the world-wide-web at the following url: |
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| https://www.php.net/license/3_01.txt |
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| If you did not receive a copy of the PHP license and are unable to |
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| obtain it through the world-wide-web, please send a note to |
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| license@php.net so we can mail you a copy immediately. |
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+----------------------------------------------------------------------+
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| Author: Kévin Dunglas <kevin@dunglas.dev> |
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+----------------------------------------------------------------------+
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*/
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#ifdef ZEND_MAX_EXECUTION_TIMERS
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#include <stdio.h>
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#include <signal.h>
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#include <time.h>
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#include <unistd.h>
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#include <errno.h>
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#include <sys/syscall.h>
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#include <sys/types.h>
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# ifdef __FreeBSD__
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# include <pthread_np.h>
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# endif
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#include "zend.h"
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#include "zend_globals.h"
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#include "zend_portability.h"
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#if __has_feature(memory_sanitizer)
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# include <sanitizer/msan_interface.h>
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#endif
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// Musl Libc defines this macro, glibc does not
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// According to "man 2 timer_create" this field should always be available, but it's not: https://sourceware.org/bugzilla/show_bug.cgi?id=27417
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# ifndef sigev_notify_thread_id
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# define sigev_notify_thread_id _sigev_un._tid
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# endif
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// FreeBSD doesn't support CLOCK_BOOTTIME
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# ifdef __FreeBSD__
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# define ZEND_MAX_EXECUTION_TIMERS_CLOCK CLOCK_MONOTONIC
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# else
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# define ZEND_MAX_EXECUTION_TIMERS_CLOCK CLOCK_BOOTTIME
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# endif
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ZEND_API void zend_max_execution_timer_init(void) /* {{{ */
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{
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pid_t pid = getpid();
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if (EG(pid) == pid) {
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return;
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}
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struct sigevent sev;
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sev.sigev_notify = SIGEV_THREAD_ID;
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sev.sigev_value.sival_ptr = &EG(max_execution_timer_timer);
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sev.sigev_signo = SIGRTMIN;
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# ifdef __FreeBSD__
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sev.sigev_notify_thread_id = pthread_getthreadid_np();
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# else
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sev.sigev_notify_thread_id = (pid_t) syscall(SYS_gettid);
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# endif
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#if __has_feature(memory_sanitizer)
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/* MSan does not intercept timer_create() */
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__msan_unpoison(&EG(max_execution_timer_timer),
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sizeof(EG(max_execution_timer_timer)));
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#endif
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// Measure wall time instead of CPU time as originally planned now that it is possible https://github.com/php/php-src/pull/6504#issuecomment-1370303727
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if (timer_create(ZEND_MAX_EXECUTION_TIMERS_CLOCK, &sev, &EG(max_execution_timer_timer)) != 0) {
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zend_strerror_noreturn(E_ERROR, errno, "Could not create timer");
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}
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EG(pid) = pid;
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# ifdef MAX_EXECUTION_TIMERS_DEBUG
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fprintf(stderr, "Timer %#jx created on thread %d\n", (uintmax_t) EG(max_execution_timer_timer), sev.sigev_notify_thread_id);
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# endif
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sigaction(sev.sigev_signo, NULL, &EG(oldact));
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}
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/* }}} */
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void zend_max_execution_timer_settime(zend_long seconds) /* {{{ }*/
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{
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/* Timer not initialized or shutdown. */
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if (!EG(pid)) {
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return;
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}
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timer_t timer = EG(max_execution_timer_timer);
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// Prevent EINVAL error
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if (seconds < 0 || seconds > 999999999) {
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seconds = 0;
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}
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struct itimerspec its;
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its.it_value.tv_sec = seconds;
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its.it_value.tv_nsec = its.it_interval.tv_sec = its.it_interval.tv_nsec = 0;
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# ifdef MAX_EXECUTION_TIMERS_DEBUG
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fprintf(stderr, "Setting timer %#jx on thread %d (%ld seconds)...\n", (uintmax_t) timer, (pid_t) syscall(SYS_gettid), seconds);
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# endif
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if (timer_settime(timer, 0, &its, NULL) != 0) {
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zend_strerror_noreturn(E_ERROR, errno, "Could not set timer");
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}
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}
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/* }}} */
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void zend_max_execution_timer_shutdown(void) /* {{{ */
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{
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/* Don't try to delete a timer created before a call to fork() */
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if (EG(pid) != getpid()) {
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return;
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}
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EG(pid) = 0;
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timer_t timer = EG(max_execution_timer_timer);
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# ifdef MAX_EXECUTION_TIMERS_DEBUG
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fprintf(stderr, "Deleting timer %#jx on thread %d...\n", (uintmax_t) timer, (pid_t) syscall(SYS_gettid));
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# endif
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int err = timer_delete(timer);
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if (err != 0) {
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zend_strerror_noreturn(E_ERROR, errno, "Could not delete timer");
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}
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}
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/* }}}} */
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#endif
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