Issue 6742: Embedding python into shared library crash on AIX (original) (raw)

Hi there, I'm trying to embedding my python code into a .so on AIX and load it with my main application. Since there is no libpython2.6.so available on AIX, I have to link my .so with libpython2.6.a. I have to make some twist to make it compile. And so far so good until I run my main. My embedding python .so give me error like the following Fatal Python error: Interpreter not initialized (version mismatch?) I check the initialization status by calling Py_IsInitialized and it said yes. So I'm wondering if this embedding python into .so ever work on AIX. I have no problem to do the same thing on linux, solaris since python has libpython2.6.so on both system. But our system needs the supoort on AIX. My embedding python is very simple like the following

#include <Python.h> #include

extern "C" void allocate() { std::cout << " am i ok = " << Py_IsInitialized() << std::endl;

Py_InitializeEx(0);
std::cout << " am i ok 1 = " << Py_IsInitialized() << std::endl;

PyRun_SimpleString("from time import time, datetime, ctime\n"
                   "print 'Today is',ctime(time())\n");
Py_Finalize();

}

my main application is also very simple #include #include #include <dlfcn.h> //#include <link.h> #include <Python.h>

typedef void (*ALLOCATE)();

int main (int argc, char ** argv) { // parse params to load shared object if (argc < 2) { std::cerr << "Usage: " << argv[0] << " sharedObject(s)" << std::endl; return 0; }

//    Py_Initialize();

for (int i = 1; i < argc; ++i)
{
void * handle = ::dlopen(argv[i], RTLD_LAZY);
if (!handle)
{
    std::cerr << dlerror() << argv[i] << std::endl;

    return 0;
}

// Use that handle to locate the symbol.  The symbol must be 
// demangled so it has to be compiled with extern "C".
ALLOCATE dlmAllocate = (ALLOCATE) ::dlsym(handle, "allocate");
if (!dlmAllocate)
{
    std::cerr << dlerror() << std::endl;
    return 0;
}

dlmAllocate();
}


return 0;

}

here is my makefile

CXX := g++

default: DLOpenTest mypython.so

DLOpenTest: DLOpen.C $(CXX) -o DLOpenTest DLOpen.C -ldl -Wl,-bE:/mnts/cdstools/Python-2.6.2/aix-ppc-5.3/lib/python2.6/config/python.exp -lld -I/mnts/cdstools/Python-2.6.2/aix-ppc-5.3/include/python2.6 -L/mnts/cdstools/Python-2.6.2/aix-ppc-5.3/lib/ -lpython2.6 -lpthread

mypython.so: mypython.C $(CXX) -shared -nostartfiles -I/mnts/cdstools/Python-2.6.2/aix-ppc-5.3/include/python2.6 -L/mnts/cdstools/Python-2.6.2/aix-ppc-5.3/lib/ -lpython2.6 -lpthread -o mypython.so mypython.C

clean: rm *.o DLOpenTest mypython.so

Can someone help me out? Or has anyone even tried same thing on AIX?

NOTE, the issue is not like issue 4434 or 1332869. Please don't reply this issue with those two number. I've seen them already. It's not helpful

Thanks a log

If you get differing results from Py_IsInitialized, my guess is that you managed to link two different copies of the Python VM into your application, each with its own set of global variables.

An AIX expert would be required to diagnose this in more detail; unfortunately, we are not aware of any such expert.