[pull] master from php:master#258
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preload_load() reads EG(class_table) and EG(function_table), but these may not be initialized. Move these accesses out of preload_load(). Closes GH-20081
* PHP-8.3: Fix access to uninitialized variables in preload_load()
* PHP-8.4: Fix access to uninitialized variables in preload_load()
* PHP-8.5: Fix access to uninitialized variables in preload_load()
Preloading may fork and wait for the child to exit. In case waitpid() is interrupted, the parent exits with a fatal error. This is fine when the syscall is interrupted by a signal whose disposition is set to terminate the process, but not otherwise. In the apache2handler SAPI, the parent is the control process. Restarting apache2 is done by sending SIGUSR1 or SIGHUP to the control process. Doing that during the waitpid() syscall would cause the control process to exit instead. Block the USR1 and HUP signals from being delivered during the syscall when running the apache2handler SAPI, as these are not supposed to terminate the process. FPM is fine as it masks relevant signals during php startup. Fixes GH-20051 Closes GH-20079 Co-authored-by: mycozyhom <welcomycozyhom@gmail.com>
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