[issue11393] Integrate faulthandler module into Python 3.3
Dave Malcolm
report at bugs.python.org
Mon Mar 21 16:59:14 CET 2011
Dave Malcolm <dmalcolm at redhat.com> added the comment:
Various thoughts/nitpicking:
- is it possible to indicate with a coding convention (e.g. comments) which parts of the code are intended to be called from a signal handler? It seems worth making this explicit. Or perhaps put it all in one file?
- within tests.py, check_enabled and check_disabled seem to me to be misnamed; it's not at all clear what they do.
I'd suggest renaming "get_output" to "run_code", perhaps (adding a docstring specifying the returned value)
"check_enabled" seems to mean "assertCodeLeadsToOutput" or somesuch.
Within backtrace.py:
- do all platforms supported by Python have a concept of numeric filedescriptors? I was wondering if FILE* might be a better abstraction here (with flushing), then read http://bugs.python.org/issue8863#msg124385 which gives the reason: fprintf etc are not signal-safe
- all of the calls to "write" ignore the return code, leading to warnings from GCC. I don't think there's any good way to handle errors from these calls, though.
Might be nice to also have SIGABRT (as per a c-level assertion failure), exposed
NB: on Fedora/RHEL we also have a whole-system crash detection system (called "abrt": https://fedorahosted.org/abrt/ ), and in theory, that means that for me, crash reports get run using the gdb pretty-print hooks.
I'm wondering to what extent this would interract with whole-system crash-detection tools: would it e.g. mask a SIGSEGV, so that the crash is not seen by that system?
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