python可以利用SO的方式去调用C++中的函数,但是需要一种调试方案来进行python和C++的联合调试,效果是直接在c++代码中打断点,然后python在进行c++so调用的时候,直接进入到断点处:
testlib.cpp
#include
using namespacestd;
PyObject* CFuncEntry(PyObject * self, PyObject *args) {
PyObject* datalist =NULL;
PyArg_ParseTuple(args,"O", &datalist);int rst = 0;for(int i=0; i < PyList_Size(datalist); ++i){int val =PyInt_AsLong(PyList_GetItem(datalist, i));
rst+=val;
}return Py_BuildValue("i", rst);
}
PyMODINIT_FUNC initCFuncEntry(void) {static PyMethodDef methods[] ={
{"CFuncEntry", (PyCFunction)CFuncEntry, METH_VARARGS, "test lib"},
{NULL, NULL,0, NULL}
};
Py_InitModule("CFuncEntry", methods);
}
call_cpp.py
#!/usr/bin/python#-*- encoding utf-8 -*-
importCFuncEntryif __name__ == "__main__":
numberlist= [1,2,3,4,5,6,7]
rst=CFuncEntry.CFuncEntry(numberlist)print rst
setup.py
from distutils.core importsetup, Extension
module1= Extension('CFuncEntry',
define_macros= [('MAJOR_VERSION', '1'),
('MINOR_VERSION', '0'),
('Py_DEBUG', 1)],
include_dirs= ['/usr/local/include'],
library_dirs= ['/usr/local/lib'],
sources= ['testlib.cpp'])
setup (name= 'PackageName',
version= '1.0',
description= 'This is a demo package',
author= 'Martin v. Loewis',
author_email= '[email protected]',
url= 'https://docs.python.org/extending/building',
long_description= '''This is really just a demo package.''',
ext_modules= [module1])
将setup.py和testlib.cpp放到同一个目录下,执行python setup.py install
可以看到CFuncEntry.so已经生成,这时执行gdb –args python-dbg call_cpp.py可以进入到gdb调试模式:
可能的问题:
1. python-dbg有可能没有安装,需要执行sudo apt-get install python-dbg进行安装;
2. 直接使用g++ -o CFuncEntry.so testlib.cpp -g -shared -fpic -DEBUG -lpython2.7_d 的方式生成的so会出现如下错误:
undefined symbol: Py_InitModule4_64
3. 直接用g++进行编译,生成so,需要加上Py_DEBUG参数:g++ -o CFuncEntry.so testlib.cpp -g -shared -fpic -DEBUG -lpython2.7_d -DPy_DEBUG
参考资料:
标签:testlib,python,Py,C++,so,CFuncEntry,cpp,调试 From: https://www.cnblogs.com/lidabo/p/17076855.html