add support for Zend Max Exeuction Timers on FreeBSD (#13393)

Author: dunglas

Zend/Zend.m4

@@ -306,7 +306,7 @@ AC_ARG_ENABLE([zend-max-execution-timers],
     [ZEND_MAX_EXECUTION_TIMERS=$enableval],
     [ZEND_MAX_EXECUTION_TIMERS=$ZEND_ZTS])
 
-AS_CASE(["$host_alias"], [*linux*], [], [ZEND_MAX_EXECUTION_TIMERS='no'])
+AS_CASE(["$host_alias"], [*linux*|*freebsd*], [], [ZEND_MAX_EXECUTION_TIMERS='no'])
 
 PHP_CHECK_FUNC(timer_create, rt)
 if test "$ac_cv_func_timer_create" != "yes"; then

Zend/zend_max_execution_timer.c

@@ -23,6 +23,9 @@
 #include <errno.h>
 #include <sys/syscall.h>
 #include <sys/types.h>
+# ifdef __FreeBSD__
+# include <pthread_np.h>
+# endif
 
 #include "zend.h"
 #include "zend_globals.h"
@@ -33,6 +36,13 @@
 # define sigev_notify_thread_id _sigev_un._tid
 # endif
 
+// FreeBSD doesn't support CLOCK_BOOTTIME
+# ifdef __FreeBSD__
+# define ZEND_MAX_EXECUTION_TIMERS_CLOCK CLOCK_MONOTONIC
+# else
+# define ZEND_MAX_EXECUTION_TIMERS_CLOCK CLOCK_BOOTTIME
+# endif
+
 ZEND_API void zend_max_execution_timer_init(void) /* {{{ */
 {
 	pid_t pid = getpid();
@@ -45,10 +55,14 @@ ZEND_API void zend_max_execution_timer_init(void) /* {{{ */
 	sev.sigev_notify = SIGEV_THREAD_ID;
 	sev.sigev_value.sival_ptr = &EG(max_execution_timer_timer);
 	sev.sigev_signo = SIGRTMIN;
+# ifdef __FreeBSD__
+	sev.sigev_notify_thread_id = pthread_getthreadid_np();
+# else
 	sev.sigev_notify_thread_id = (pid_t) syscall(SYS_gettid);
+# endif
 
 	// 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
-	if (timer_create(CLOCK_BOOTTIME, &sev, &EG(max_execution_timer_timer)) != 0) {
+	if (timer_create(ZEND_MAX_EXECUTION_TIMERS_CLOCK, &sev, &EG(max_execution_timer_timer)) != 0) {
 		zend_strerror_noreturn(E_ERROR, errno, "Could not create timer");
 	}