8000 `test_faulthandler.test_register_chain` hangs under TSAN · Issue #129825 · python/cpython · GitHub
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colesbury opened this issue Feb 7, 2025 · 0 comments
Open

test_faulthandler.test_register_chain hangs under TSAN #129825

colesbury opened this issue Feb 7, 2025 · 0 comments
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tests Tests in the Lib/test dir type-bug An unexpected behavior, bug, or error

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colesbury commented Feb 7, 2025 •
edited by bedevere-app bot
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Bug report

Run with:

TSAN_OPTIONS=suppressions=Tools/tsan/suppressions.txt handle_segv=0 ./python -m test test_faulthandler -m test_register_chain -v

This was in the default (GIL-enabled build).

There's some sort of infinite loop between TSAN's interception of kill() and our attempt to pass the signal to the previous signal handler.

I think we should just skip the test under TSAN. I'm not sure it's worth investigating too deeply.

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@colesbury colesbury added tests Tests in the Lib/test dir type-bug An unexpected behavior, bug, or error labels Feb 7, 2025
colesbury added a commit to colesbury/cpython that referenced this issue Feb 7, 2025
@colesbury
pythongh-129825: Skip test_faulthandler.test_register_chain under TSAN
5e98b08 
The test hangs when run under TSAN due to an interaction between TSAN's
signal interception and our attempt to call the previous signal handler.
@bedevere-app bedevere-app bot mentioned this issue Feb 7, 2025
Merged
colesbury added a commit that referenced this issue Feb 7, 2025
@colesbury
gh-129825: Skip test_faulthandler.test_register_chain under TSAN (< 597E a class="issue-link js-issue-link" data-error-text="Failed to load title" data-id="2838895712" data-permission-text="Title is private" data-url="https://github.com/python/cpython/issues/129827" data-hovercard-type="pull_request" data-hovercard-url="/python/cpython/pull/129827/hovercard" href="https://github.com/python/cpython/pull/129827">gh-…
2248a9c 
…129827)

The test hangs when run under TSAN due to an interaction between TSAN's
signal interception and our attempt to call the previous signal handler.
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