[sword-devel] Python bindings cause python crash
Ben Morgan
benpmorgan at gmail.com
Wed Dec 19 17:18:18 MST 2007
Hi,
Instead of:
>>> from Sword import *
>>> mf = MarkupFilterMgr(FMT_WEBIF)
>>> mgr = SWMgr(mf)
Try
>>> from Sword import *
>>> mf = MarkupFilterMgr(FMT_WEBIF)
>>> mf.thisown = False
>>> mgr = SWMgr(mf)
mf.thisown = False tells swig not to GC the sword object.
This may or may not help. I have had problems with it crashing before with
modmaps (static linking seemed to help). Generally, if you create a Sword
object, and then pass it in as a parameter, you need to do this so that it
doesn't get GC'ed
As well as this, you can iterate through using the more pythonic:
for mod in mods:
print mod.c_str()
--
God Bless,
Ben
-------------------------------------------------------------------------------------------
The Lord is not slow to fulfill his promise as some count slowness,
but is patient toward you, not wishing that any should perish,
but that all should reach repentance.
2 Peter 3:9 (ESV)
On 12/20/07, Jon Brisbin <jon at jbrisbin.com> wrote:
>
> I've got my _Sword.so module to compile and I statically linked libsword.aand
> libclucene.a into it. So far, I'm able to create the objects fine, but
> when I try to get my modules, Python crashes with the following trace:
>
> Process: Python [3639]
> Path:
> /System/Library/Frameworks/Python.framework/Versions/2.5/Resources/Python.app/Contents/MacOS/Python
> Identifier: Python
> Version: ??? (???)
> Code Type: X86 (Native)
> Parent Process: bash [3571]
>
> Date/Time: 2007-12-19 09:17:11.661 -0600
> OS Version: Mac OS X 10.5.1 (9B18)
> Report Version: 6
>
> Exception Type: EXC_BAD_ACCESS (SIGBUS)
> Exception Codes: KERN_PROTECTION_FAILURE at 0x0000000000000000
> Crashed Thread: 0
>
> Thread 0 Crashed:
> 0 libSystem.B.dylib 0xffff07d4 __memcpy + 52
> 1 _Sword.so 0x004a71da
> sword::SWBuf::SWBuf(sword::SWBuf const&, unsigned long) + 170
> 2 _Sword.so 0x0048fc27 swig::traits_from<
> sword::SWBuf>::from(sword::SWBuf const&) + 49 (Sword.cxx:3485)
> 3 _Sword.so 0x0048ffc1 swig::traits_from<std::pair<
> sword::SWBuf const, sword::SWModule*> >::from(std::pair<sword::SWBufconst,
> sword::SWModule*> const&) + 33 (Sword.cxx:4393)
> 4 _Sword.so 0x004882c7 swig::PySwigIterator::next()
> + 23 (Sword.cxx:2726)
> 5 _Sword.so 0x00415c33 _wrap_PySwigIterator_next +
> 297 (Sword.cxx:5700)
> 6 org.python.python 0x0011fd5d PyObject_Call + 50
> 7 org.python.python 0x0018dfd8 PyEval_EvalFrameEx + 19086
> 8 org.python.python 0x0018f47b PyEval_EvalCodeEx + 1638
> 9 org.python.python 0x0018daa5 PyEval_EvalFrameEx + 17755
> 10 org.python.python 0x0018f47b PyEval_EvalCodeEx + 1638
> 11 org.python.python 0x0018f568 PyEval_EvalCode + 87
> 12 org.python.python 0x001a6a0c PyErr_Display + 1896
> 13 org.python.python 0x001a867b PyRun_InteractiveOneFlags +
> 523
> 14 org.python.python 0x001a87c9 PyRun_InteractiveLoopFlags +
> 216
> 15 org.python.python 0x001a8bfb PyRun_AnyFileExFlags + 85
> 16 org.python.python 0x001b3c23 Py_Main + 3095
> 17 org.python.pythonapp 0x00001fca 0x1000 + 4042
>
> Thread 0 crashed with X86 Thread State (32-bit):
> eax: 0xffff07a0 ebx: 0x004a713b ecx: 0x00000000 edx: 0x00000002
> edi: 0x0032d860 esi: 0x00000000 ebp: 0xbfffeca8 esp: 0xbfffeca0
> ss: 0x0000001f efl: 0x00010202 eip: 0xffff07d4 cs: 0x00000017
> ds: 0x0000001f es: 0x0000001f fs: 0x00000000 gs: 0x00000037
> cr2: 0x00000000
>
> Binary Images:
> 0x1000 - 0x1ffe org.python.pythonapp 2.5.0 (2.5.0a0)
> <fccdb19d43071ba163b93b4fddd2a7d0>
> /System/Library/Frameworks/Python.framework/Versions/2.5/Resources/Python.app/Contents/MacOS/Python
> 0x49000 - 0x4afff readline.so ??? (???)
> <64946ffe456c7bf202eb236c1afaa0c4>
> /System/Library/Frameworks/Python.framework/Versions/2.5/lib/python2.5/lib-dynload/readline.so
> 0x118000 - 0x1e3ffb org.python.python 2.5 (2.5)
> <ce7182a9e975861a321dfeeca76f54db>
> /System/Library/Frameworks/Python.framework/Versions/2.5/Python
> 0x2b0000 - 0x2c6fea libedit.2.dylib ??? (???)
> <be5a6f391887bb96bdeeafd443cf19fb> /usr/lib/libedit.2.dylib
> 0x400000 - 0x613fe7 +_Sword.so ??? (???)
> <cb87ac42234856be59203679fcefd578> /Users/jbrisbin/scratch/_Sword.so
> 0x8fe00000 - 0x8fe2d883 dyld 95.3 (???)
> <3896c718b33f3e065e199a659baf1a2b> /usr/lib/dyld
> 0x90780000 - 0x907ddffb libstdc++.6.dylib ??? (???)
> <04b812dcec670daa8b7d2852ab14be60> /usr/lib/libstdc++.6.dylib
> 0x90b58000 - 0x90b5ffe9 libgcc_s.1.dylib ??? (???)
> <a9ab135a5f81f6e345527df87f51bfc9> /usr/lib/libgcc_s.1.dylib
> 0x91da1000 - 0x91dafffd libz.1.dylib ??? (???)
> <5ddd8539ae2ebfd8e7cc1c57525385c7> /usr/lib/libz.1.dylib
> 0x92592000 - 0x92593fef libmathCommon.A.dylib ??? (???)
> /usr/lib/system/libmathCommon.A.dylib
> 0x9431d000 - 0x9434cff7 libncurses.5.4.dylib ??? (???)
> <3b2ac2ca8190942b6b81d2a7012ea859> /usr/lib/libncurses.5.4.dylib
> 0x963ba000 - 0x96514fe3 libSystem.B.dylib ??? (???)
> <08d9ec2f36455fc197b9b44adf62f304> /usr/lib/libSystem.B.dylib
> 0xffff0000 - 0xffff1780 libSystem.B.dylib ??? (???)
> /usr/lib/libSystem.B.dylib
>
>
> I'm just playing around, reading the example C++ files and trying to
> translate that into python. Here's what I did to cause the error:
>
>
> +-( ~/scratch ):> python
> Python 2.5.1 (r251:54863, Oct 9 2007, 20:39:46)
> [GCC 4.0.1 (Apple Inc. build 5465)] on darwin
> Type "help", "copyright", "credits" or "license" for more information.
> >>> from Sword import *
> >>> mf = MarkupFilterMgr(FMT_WEBIF)
> >>> mgr = SWMgr(mf)
> >>> mods = mgr.getModules()
> >>> mods
> <Sword.ModuleMap; proxy of <Swig Object of type 'std::map<
> sword::SWBuf,sword::SWModule *,std::less<sword::SWBuf>,std::allocator<std::pair<
> sword::SWBuf const,sword::SWModule * > > > *' at 0x3282e8> >
> >>> mod = mods.begin()
> >>> mod
> <Sword.PySwigIterator; proxy of <Swig Object of type 'swig::PySwigIterator
> *' at 0x315db0> >
> >>> mod.next()
> Bus error
>
>
> Same thing happens with I try and read anything from the iterator. It just
> crashes python.
>
>
> Any ideas?
>
> Thanks!
>
>
> Jon Brisbin
> http://jbrisbin.com
>
>
>
>
>
>
>
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