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Segmentation fault with opcache.jit=tracing enabled on aarch64 #16829

Open vkurdin opened 1 day ago

vkurdin commented 1 day ago

Description

I've created a repository with code to reproduce the issue. The code might seem odd because I was trying to minimize the scope of the problem. If I put the code to one php file, segfault goes away. I need to copy reproducing script to a new file via shell script helper, otherwise segfault goes away again.

repo: https://github.com/vkurdin/php-segfault-reproducer

$ docker run --rm -it -v `pwd`:/app -w /app php:8.4.0RC4-cli ./run.sh
Segmentation fault

The segfault was originally discovered while benchmarking the code using the phpbench/phpbench framework. The framework generates files in /tmp for each iteration, with multiple revolutions for the benchmarked subject inside.

macOS 15.1 on Macbook Pro M1 16GB: Darwin mymbp.local 24.1.0 Darwin Kernel Version 24.1.0: Thu Oct 10 21:05:14 PDT 2024; root:xnu-11215.41.3~2/RELEASE_ARM64_T8103 arm64

OrbStack (alternative for Docker Desktop): Version 1.8.1 (18374) Linux 21099c09508c 6.11.6-orbstack-00279-g28c6c77332e6 #57 SMP Mon Nov 4 08:11:30 UTC 2024 aarch64 Linux

php:8.4.0RC4 container: https://hub.docker.com/layers/library/php/8.4.0RC4-cli/images/sha256-d29b8d066ea65c94c23784e29920704d29aeb7c01abb23341e48299f5380b88f?context=explore PHP 8.4.0RC4 (cli) (built: Nov 12 2024 03:30:31) (NTS) Copyright (c) The PHP Group Built by https://github.com/docker-library/php Zend Engine v4.4.0RC4, Copyright (c) Zend Technologies

PHP Version

PHP 8.4.0RC4

Operating System

No response

MrSuddenJoy commented 19 hours ago

@vkurdin OK, the moment I saw that you run php 8.4 I knew strange things are unavoidable.

Just unZend php. Thats it.

iluuu1994 commented 8 hours ago

Thanks for the reproducer! /cc @dstogov