I don't have gdb on device; does the following tell you where Python's strdup is called?
>> _PyMem_RawStrdup >> /bld/python/Python-3.4.2/Objects/obmalloc.c:323 On Fri, Jan 30, 2015 at 11:52 AM, Ryan Gonzalez <rym...@gmail.com> wrote: > Is it possible at all to get a stack trace of the crash using gdb? Try the > steps here. > > That way we can see where Python's own strdup function is getting called. > > On Fri, Jan 30, 2015 at 9:05 AM, Cyd Haselton <chasel...@gmail.com> wrote: >> >> Absolutely. Good thing I have addr2line on device >> >> /bld/python/Python-3.4.2 $ addr2line -C -f -e /lib/libpython3.4m.so.1.0 >> 0008bbc8 >> _PyMem_RawStrdup >> /bld/python/Python-3.4.2/Objects/obmalloc.c:323 >> /bld/python/Python-3.4.2 $ >> >> >> >> On Thu, Jan 29, 2015 at 8:26 PM, Ryan <rym...@gmail.com> wrote: >> > Could you try the steps at http://stackoverflow.com/a/11369475/2097780? >> > They >> > allow you to get a better idea of where libc is crashing. >> > >> > Cyd Haselton <chasel...@gmail.com> wrote: >> >> >> >> Managed to get this out of logcat: >> >> F(11914) Fatal signal 11 (SIGSEGV) at 0x00000000 (code=1), thread >> >> 11914 (python) (libc) >> >> >> >> [ 01-29 19:30:55.855 23373:23373 F/libc ] >> >> Fatal signal 11 (SIGSEGV) at 0x00000000 (code=1), thread 23373 (python) >> >> >> >> Less detail than strace but it seems to be that python is segfaulting >> >> libc... >> >> >> >> On Wed, Jan 28, 2015 at 11:23 AM, Ryan Gonzalez <rym...@gmail.com> >> >> wrote: >> >>> >> >>> On Wed, Jan 28, 2015 at 10:43 AM, Guido van Rossum <gu...@python.org> >> >>> wrote: >> >>>> >> >>>> >> >>>> What I see in the strace: >> >>>> >> >>>> ... load libpython3.4m.so.1.0 >> >>>> ... load libm >> >>>> ... open /dev/__properties__ and do something to it >> >>>> (what?) >> >>>> ... get current time >> >>>> ... allocate memory >> >>>> ... getuid >> >>>> ... segfault >> >>>> >> >>>> That's not a lot to go on, but it doesn't look as if it has started >> >>>> to >> >>>> load modules yet. >> >>>> >> >>>> Does /dev/__properties__ ring a bell? Not to me. >> >>> >> >>> >> >>> >> >>> >> >>> >> >>> https://android.googlesource.com/platform/system/core/+/tools_r22/init/property_service.c >> >>> is the code that works with that file. >> >>> >> >>> This explains it a bit (slides 24-29). Looks like something to do >> >>> with >> >>> interprocess communication. Likely has nothing to do with Python >> >>> itself. >> >>> >> >>> Maybe this would be useful? >> >>> >> >>>> >> >>>> That stack trace would be really helpful. >> >>>> >> >>>> On Wed, Jan 28, 2015 at 8:34 AM, Cyd Haselton <chasel...@gmail.com> >> >>>> wrote: >> >>>>> >> >>>>> >> >>>>> Apologies...I'm not sure what a stack track is, but I do have the >> >>>>> strace. Nearest I can tell, it happens due to an open call, though >> >>>>> I >> >>>>> am probably wrong. >> >>>>> Attaching the strace output to this email. I'm going to head back >> >>>>> to >> >>>>> the documentation and to back out of some Android-related changes >> >>>>> in >> >>>>> _localemodule.c >> >>>>> >> >>>>> On Wed, Jan 28, 2015 at 9:43 AM, Guido van Rossum >> >>>>> <gu...@python.org> >> >>>>> wrote: >> >>>>>> >> >>>>>> There could be a million differences relevant (unicode, ints, >> >>>>>> ...). >> >>>>>> Perhaps >> >>>>>> the importlib bootstrap is failing. Perhaps the dynamic loading >> >>>>>> code >> >>>>>> changed. Did you get a stack track? (IIRC strace shows a syscall >> >>>>>> trace >> >>>>>> -- >> >>>>>> also useful, but doesn't tell you precisely how >> >>>>>> it segfaulted.) >> >>>>>> >> >>>>>> On Wed, Jan 28, 2015 at 6:43 AM, Cyd Haselton >> >>>>>> <chasel...@gmail.com> >> >>>>>> wrote: >> >>>>>>> >> >>>>>>> >> >>>>>>> All, >> >>>>>>> I recently ditched my attempts to port Python 2.7.8 to Android in >> >>>>>>> favor of Python 3.4.2. Unfortunately, after using the same >> >>>>>>> configure >> >>>>>>> options in the same environment, and modifying the setup.py as >> >>>>>>> needed, >> >>>>>>> the newly built binary throws a segfault when the >> >>>>>>> generate-posix-vars >> >>>>>>> portion of the build is reached...and when it is run as well >> >>>>>>> (i.e. >> >>>>>>> ./python --help, ./python -E -S -m sysconfig, or similar) >> >>>>>>> >> >>>>>>> I took a strace of ./python, however I'm a bit lost when >> >>>>>>> reviewing >> >>>>>>> it. >> >>>>>>> Any ideas as to what may be going on...i.e. why Python 2.7 works >> >>>>>>> but >> >>>>>>> 3.x throws a segfault? >> >>>>>>> >> >>>>>>> Thanks in advance, >> >>>>>>> Cyd >> >>>>>>> ________________________________ >> >>>>>>> >> >>>>>>> Python-Dev mailing list >> >>>>>>> >> >>>>>>> Python-Dev@python.org >> >>>>>>> https://mail.python.org/mailman/listinfo/python-dev >> >>>>>>> Unsubscribe: >> >>>>>>> >> >>>>>>> >> >>>>>>> https://mail.python.org/mailman/options/python-dev/guido%40python.org >> >>>>>> >> >>>>>> >> >>>>>> >> >>>>>> >> >>>>>> >> >>>>>> -- >> >>>>>> --Guido van Rossum (python.org/~guido) >> >>>> >> >>>> >> >>>> >> >>>> >> >>>> >> >>>> -- >> >>>> --Guido van Rossum (python.org/~guido) >> >>>> >> >>>> ________________________________ >> >>>> >> >>>> Python-Dev mailing list >> >>>> Python-Dev@python.org >> >>>> https://mail.python.org/mailman/listinfo/python-dev >> >>>> Unsubscribe: >> >>>> >> >>>> https://mail.python.org/mailman/options/python-dev/rymg19%40gmail.com >> >>> >> >>> >> >>> >> >>> >> >>> >> >>> -- >> >>> Ryan >> >>> If anybody ever asks me why I prefer C++ to C, my answer will be >> >>> simple: >> >>> "It's becauseslejfp23(@#Q*(E*EIdc-SEGFAULT. Wait, I don't think that >> >>> was >> >>> nul-terminated." >> >>> Personal reality distortion fields are immune to contradictory >> >>> evidence. >> >>> - >> >>> srean >> >>> Check out my website: http://kirbyfan64.github.io/ >> > >> > >> > -- >> > Sent from my Android phone with K-9 Mail. Please excuse my brevity. >> > Check out my website: http://kirbyfan64.github.io/ > > > > > -- > Ryan > If anybody ever asks me why I prefer C++ to C, my answer will be simple: > "It's becauseslejfp23(@#Q*(E*EIdc-SEGFAULT. Wait, I don't think that was > nul-terminated." > Personal reality distortion fields are immune to contradictory evidence. - > srean > Check out my website: http://kirbyfan64.github.io/ _______________________________________________ Python-Dev mailing list Python-Dev@python.org https://mail.python.org/mailman/listinfo/python-dev Unsubscribe: https://mail.python.org/mailman/options/python-dev/archive%40mail-archive.com
