如何调试Python的分段错误?
我们正在尝试在SuSE 12.3上运行我们的python代码。我们遇到了可重复的分段错误。这个Python代码在其他平台上运行多年,没有出现过分段错误。
我们只编写Python,没有C扩展...
有什么最好的调试方法吗?我知道一点ansi c,但那是十年前的事情...
Python 2.7.5
更新
分段错误发生在解释器关闭时。
我可以运行脚本多次:
python -m pdb myscript.py arg1 arg1
continue
run
continue
run
但是,如果我使用ctrl-d离开pdb,就会出现分段错误。
更新2
我现在尝试使用gdb进行调试:
gdb
> file python
> run myscript.py arg1 arg2
Program received signal SIGSEGV, Segmentation fault.
[Switching to Thread 0x7fffefbe2700 (LWP 15483)]
0x00007ffff7aef93c in PyEval_EvalFrameEx () from /usr/lib64/libpython2.7.so.1.0
(gdb) bt
#0 0x00007ffff7aef93c in PyEval_EvalFrameEx () from /usr/lib64/libpython2.7.so.1.0
#1 0x00007ffff7af5303 in PyEval_EvalCodeEx () from /usr/lib64/libpython2.7.so.1.0
#2 0x00007ffff7adc858 in ?? () from /usr/lib64/libpython2.7.so.1.0
#3 0x00007ffff7ad840d in PyObject_Call () from /usr/lib64/libpython2.7.so.1.0
#4 0x00007ffff7af1082 in PyEval_EvalFrameEx () from /usr/lib64/libpython2.7.so.1.0
#5 0x00007ffff7af233d in PyEval_EvalFrameEx () from /usr/lib64/libpython2.7.so.1.0
#6 0x00007ffff7af233d in PyEval_EvalFrameEx () from /usr/lib64/libpython2.7.so.1.0
#7 0x00007ffff7af5303 in PyEval_EvalCodeEx () from /usr/lib64/libpython2.7.so.1.0
#8 0x00007ffff7adc5b6 in ?? () from /usr/lib64/libpython2.7.so.1.0
#9 0x00007ffff7ad840d in PyObject_Call () from /usr/lib64/libpython2.7.so.1.0
#10 0x00007ffff7ad9171 in ?? () from /usr/lib64/libpython2.7.so.1.0
#11 0x00007ffff7ad840d in PyObject_Call () from /usr/lib64/libpython2.7.so.1.0
#12 0x00007ffff7aeeb62 in PyEval_CallObjectWithKeywords () from /usr/lib64/libpython2.7.so.1.0
#13 0x00007ffff7acc757 in ?? () from /usr/lib64/libpython2.7.so.1.0
#14 0x00007ffff7828e0f in start_thread () from /lib64/libpthread.so.0
#15 0x00007ffff755c7dd in clone () from /lib64/libc.so.6
更新3
我从http://hg.python.org/cpython/file/default/Misc/gdbinit安装了gdbinit,并从http://download.opensuse.org/debug/distribution/12.3/repo/oss/suse/x86_64/下载了调试符号。
(gdb) pystack
No symbol "_PyUnicode_AsString" in current context.
现在怎么做?
更新4 我们安装了一个新的RPM包(python-2.7.5-3.1.x86_64)。我们得到的segmentation fault(分段错误)更少了,但仍然会发生。 这是链接到资源库的链接:
http://download.opensuse.org/repositories/devel:/languages:/python:/Factory/openSUSE_12.3/x86_64/
更新5 解决了我的初始问题:
这是http://bugs.python.org/issue1856(shutdown(exit)可以挂起或与运行的守护线程发生分段错误)