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CI: Work around a libasan bug seen on Ubuntu with the Linux 6.5 kernel

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We are recently seeing SEGV crashes during the build (while running code
generators) from within libasan itself. Turns out this is libasan bug
seen with the Linux 6.5 kernel on Ubuntu.
This commit is contained in:
Timothy Flynn 2024-03-12 19:53:15 -04:00 committed by Tim Flynn
parent 4c15c87d0c
commit 5713c2ffdd
Notes: sideshowbarker 2024-07-17 01:53:23 +09:00 
Author: https://github.com/trflynn89
Commit: https://github.com/SerenityOS/serenity/commit/5713c2ffdd
Pull-request: https://github.com/SerenityOS/serenity/pull/23567
Reviewed-by: https://github.com/ADKaster ✅
1 changed files with 9 additions and 0 deletions
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9
Meta/Azure/Lagom.yml
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@ -58,6 +58,15 @@ jobs:
ccache_version: 2
serenity_ccache_size: '2G'
# On Ubuntu, with Linux kernel 6.5, ARCH_MMAP_RND_BITS was changed from ARCH_MMAP_RND_BITS_MIN (28 on x64) to
# ARCH_MMAP_RND_BITS_MAX (32 on x64). This breaks assumptions made by libasan's allocators, and we see a flaky
# crash from within libasan itself. Here, we restore the previous value until we have a version of GCC which fixes
# the issue in libasan (reportedly 13.2.1): https://stackoverflow.com/questions/77894856/possible-bug-in-gcc-sanitizers
- ${{ if eq(parameters.os, 'Linux') }}:
- script: |
sudo sysctl vm.mmap_rnd_bits=28
displayName: 'Work around libasan ASLR bug'
- ${{ if eq(parameters.os, 'Android') }}:
- script: |
yes | $ANDROID_SDK_ROOT/tools/bin/sdkmanager "ndk;$(ndk_version)"