Fix ctypes DTraceConsumerThread to also call dtrace_close#7
Merged
tmetsch merged 1 commit intotmetsch:masterfrom Nov 16, 2017
Merged
Fix ctypes DTraceConsumerThread to also call dtrace_close#7tmetsch merged 1 commit intotmetsch:masterfrom
tmetsch merged 1 commit intotmetsch:masterfrom
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Owner
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Thanks a million - drinks on me when we meet :-) |
Contributor
Author
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Ha, well, this only fixes the less-popular ctypes version; #8 still stands for the Cython version, and I haven't yet had a chance to try fixing it. |
Contributor
Author
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You only closed this, rather than merging; was that intentional? |
Owner
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It was not intentional! sry. |
arichardson
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Dec 29, 2020
Buffered output hanlding appears to be broken on macOS. The -B flag is disabled in dtrace.c () and compiling dtrace.c with that flag enabled results in the same crash that I see with python-dtrace: ``` * thread tmetsch#1, queue = 'com.apple.main-thread', stop reason = EXC_BAD_ACCESS (code=1, address=0x7fb100000000) * frame #0: 0x00007fff6f83de52 libsystem_platform.dylib`_platform_strlen + 18 frame tmetsch#1: 0x00007fff6f6d9891 libsystem_c.dylib`__vfprintf + 5379 frame tmetsch#2: 0x00007fff6f6ffad3 libsystem_c.dylib`__v2printf + 475 frame tmetsch#3: 0x00007fff6f6e5ee7 libsystem_c.dylib`_vsnprintf + 417 frame tmetsch#4: 0x00007fff6f6e5f90 libsystem_c.dylib`vsnprintf + 68 frame tmetsch#5: 0x00007fff6d3650e3 libdtrace.dylib`dt_printf + 524 frame tmetsch#6: 0x00007fff6d33da7f libdtrace.dylib`dt_consume_cpu + 2536 frame tmetsch#7: 0x00007fff6d33c9e0 libdtrace.dylib`dtrace_consume + 1090 frame tmetsch#8: 0x00007fff6d366534 libdtrace.dylib`dtrace_work + 116 frame tmetsch#9: 0x000000010d6be9ff dtrace2`main(argc=4, argv=0x00007ffee2547250) at dtrace2.c:1834:17 frame tmetsch#10: 0x00007fff6f647cc9 libdyld.dylib`start + 1 ``` To work around this crash, output to stderr for now.
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The ctypes DTraceConsumerThread does not currently call dtrace_close on its handle, so it gets leaked. This copies to destructor from DTraceConsumer.