Hi all,
My first post to the list. :) I'm debugging one of our application
crashes, and I thought maybe one of you has seen something similar
before. Our application is mostly Python, with some work being done in
a native C++ module. Anyway, I'm getting a memory access violation at
the following stack:
CRASHING THREAD
EXCEPTION POINTERS: 0x0012e424
ExceptionRecord: 0x0012e518
ExceptionCode: 0xc0000005 EXCEPTION_ACCESS_VIOLATION
ExceptionFlags: 0x00000000
ExceptionAddress: 0x7c901010
NumberParameters: 2
ExceptionInformation[0]: 0x00000000
ExceptionInformation[1]: 0x00000034
ExceptionRecord: 0x00000000
THREAD ID: 10b0 frame count: 4
PYTHON23!0x000baa00 - PyFile_Type
PYTHON23!0x0003ac27 - PyFile_SetEncoding
MSVCRT!0x00030a06 - clearerr
ntdll!0x00001010 - RtlEnterCriticalSection
Here's my understanding: something is getting called on a PyFileObject
where f_fp is NULL, and clearerr in the multithreaded runtime tries to
enter an invalid critical section. It looks like PyFile_SetEncoding in
the stack, but I can't figure out how in the Python source how
SetEncoding calls clearerr.
Based on the timing of the crashes, I also think it might have something
to do with log rollovers in RotatingFileHandler.
Has anyone run into something similar? I don't expect anyone to spend a
lot of time on this, but if there are any quick tips, they would be
greatly appreciated...
We're using Python 2.3.5 and Visual C++ 6.
--
Chad Austin
http://imvu.com/technology
