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Fix pcntl_rfork() / pcntl_forkx() with zend-max-execution-timers #18958

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Fix pcntl_rfork() / pcntl_forkx() with zend-max-execution-timers #18958

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@arnaud-lb arnaud-lb commented Jun 27, 2025 •
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After calling pcntl_rfork() or pcntl_forkx(), the child process triggers a fatal error during shutdown, in ZTS builds with --enable-zend-max-execution-timers:

Fatal error: Could not set timer: Invalid argument (22) in Unknown on line 0

Here I fix this issue by calling zend_max_execution_timer_init(); in the child process, as we do in pcntl_fork():

php-src/ext/pcntl/pcntl.c

Lines 299 to 300 in c7c6a79

} else if (id == 0) {
zend_max_execution_timer_init();

php-src/Zend/zend_max_execution_timer.h

Lines 25 to 26 in c7c6a79

/* Must be called after calls to fork() */
ZEND_API void zend_max_execution_timer_init(void);

See also: #10141

@arnaud-lb arnaud-lb changed the base branch from master to PHP-8.3 June 27, 2025 12:08
@arnaud-lb arnaud-lb mentioned this pull request Jun 27, 2025
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@arnaud-lb arnaud-lb marked this pull request as ready for review June 27, 2025 12:43
@arnaud-lb arnaud-lb requested a review from devnexen as a code owner June 27, 2025 12:43
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devnexen approved these changes Jun 27, 2025
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LCTM

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Closed by aee1d7f

@arnaud-lb arnaud-lb closed this Jun 27, 2025
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