Hello everyone,
I'm trying to embed Python interpreter in C code, but in a specific way:
loading compiled bytecode into a memory location and executing it (don't
ask why, complicated reasons).
PyImport_ExecCodeModule seems like obvious candidate, docs say:
"Given a module name (possibly of the form package.module) and a code
object read from a Python bytecode file or obtained from the built-in
function compile(), load the module."
Code:
---cut---
#include <Python.h>
#include <stdio.h>
#include <stdlib.h>
#include <syslog.h>
#include <unistd.h>
int load_file(char *fname, unsigned char** result)
{
int size = 0;
FILE *f = fopen(fname, "rb");
if (f == NULL)
{
*result = NULL;
return -1;
}
fseek(f, 0, SEEK_END);
size = ftell(f);
*result = (unsigned char *) malloc(size+1);
fseek(f, 0, SEEK_SET);
size = fread(*result, sizeof(unsigned char), size, f);
return size;
}
int main(int argc, char **argv)
{
int size;
unsigned char *python_code;
PyObject *mainobj;
size = load_file("multiply.pyc", &python_code);
Py_Initialize();
mainobj = PyImport_ExecCodeModule("multiply", (PyObject *)
python_code);
Py_Finalize();
}
---cut---
Compiling it following way works fine:
${CC} testit.c -g -o testit -I/usr/include/python2.4 -lpython2.4 -lm
-lutil -lpthread -ldl -L/usr/lib/python2.4/config
However, the damn thing crashes on this call:
33 mainobj = PyImport_ExecCodeModule("multiply", (PyObject
*) python_code);
(gdb) n
Program received signal SIGSEGV, Segmentation fault.
0x0804e7f6 in PyImport_ExecCodeModuleEx ()
The .pyc file woks just fine in Python interpreter:
import multiply
multiply.multiply()
The result of 12345 x 6789 : 83810205
83810205
What I am doing wrong? Please help.
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