gh-137185: Fix _Py_DumpStack() async signal safety
#137187
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Call backtrace() once when installing the signal handler to ensure that libgcc is dynamically loaded outside the signal handler. This fixes a "signal-unsafe call inside of a signal" TSan error from test_faulthandler.test_enable_fd.
gpshead
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Jul 29, 2025
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Thanks @colesbury for the PR 🌮🎉.. I'm working now to backport this PR to: 3.14. |
miss-islington
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Jul 29, 2025
…137187) Call backtrace() once when installing the signal handler to ensure that libgcc is dynamically loaded outside the signal handler. This fixes a "signal-unsafe call inside of a signal" TSan error from test_faulthandler.test_enable_fd. (cherry picked from commit 11a8652) Co-authored-by: Sam Gross <colesbury@gmail.com>
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GH-137206 is a backport of this pull request to the 3.14 branch. |
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Call backtrace() once when installing the signal handler to ensure that libgcc is dynamically loaded outside the signal handler.
This fixes a "signal-unsafe call inside of a signal" TSan error from test_faulthandler.test_enable_fd.
_Py_DumpStack()is not signal-safe the first time it's called #137185