当我使用Python的调试版本时，如何使用gdb ?

My version of gdb is linked against my system python, but I am currently working with a special debug build of python. Hence, gdb fails to launch correctly, with errors like this:

我的gdb版本与我的系统python相关联，但是我目前正在使用python的特殊调试构建。因此，gdb未能正确启动，错误如下:

$ gdb
gdb: Symbol `_Py_ZeroStruct' has different size in shared object, consider re-linking
gdb: Symbol `PyBool_Type' has different size in shared object, consider re-linking
gdb: Symbol `_Py_NotImplementedStruct' has different size in shared object, consider re-linking
gdb: Symbol `PyFloat_Type' has different size in shared object, consider re-linking
gdb: Symbol `_Py_TrueStruct' has different size in shared object, consider re-linking
gdb: Symbol `_Py_NoneStruct' has different size in shared object, consider re-linking
Segmentation fault

...or maybe errors like this:

…或者像这样的错误:

gdb: symbol lookup error: gdb: undefined symbol: PyUnicodeUCS4_FromEncodedObject

How can I use gdb even though a non-system version of Python exists on my LD_LIBRARY_PATH?

即使在LD_LIBRARY_PATH上存在一个非系统版本的Python，我如何使用gdb呢?

1 个解决方案

#1

I found the answer in the rootpy Documentation:

我在rootpy文档中找到了答案:

The way around this is to preload the correct library by setting LD_PRELOAD, and then unsetting it before your program is executed. For example, this will debug my-program-to-debug:

方法是通过设置LD_PRELOAD来预加载正确的库，然后在程序执行之前将其取消。例如，这将调试my-program- debug:

LD_PRELOAD=/usr/lib/libpython2.7.so gdb -ex 'set environ LD_PRELOAD' --args my-program-to-debug

Note that you need to set LD_PRELOAD to the right version of python that gdb was compiled against, which you can find with ldd $(which gdb) from a fresh environment.

注意，您需要将LD_PRELOAD设置为对gdb所编译的python的正确版本，您可以从新的环境中找到ldd $(gdb)。