Segmentation fault in exception handler with CALL VM on AArch64

[pfustc]

Description

Hi @dstogov,

I just see a new segmentation fault issue in exception handlers on AArch64 with CALL VM debug build. I don't see this issue a few weeks ago, so it's probably caused by some recent patch.

The following code:

<?php
  $error = 1 / 0;
?>

Resulted in this output:

Segmentation fault (core dumped)

But I expected this output instead:

PHP Fatal error:  Uncaught DivisionByZeroError: Division by zero in /mnt/local/www/index.php:2
Stack trace:
#0 {main}
  thrown in /mnt/local/www/index.php on line 2

My PHP was built with php Zend/zend_vm_gen.php --with-vm-kind=CALL and bash configure --enable-debug.

My php.ini

opcache.enable_cli=1
opcache.jit=function
opcache.jit_buffer_size=16M
opcache.jit_debug=0x100
opcache.jit_hot_func=1
opcache.jit_hot_loop=1
opcache.jit_hot_return=1
opcache.jit_hot_side_exit=1
zend.assertions=1

This can happen on general Linux/AArch64 so it's easy to reproduce.

PHP Version

PHP master @ 6bd680b

Operating System

Ubuntu 22.04

[dstogov]

Thanks for catching this