PyMarshal Commands crash on Windows

[Guest]

Hi!

Can anyone help me with this issue?

int main (int argc, char * const argv[]) {
Py_Initialize();

FILE* fp = fopen("/Users/test/Desktop/123.pyc","wb");
PyCodeObject* op = (PyCodeObject*)Py_CompileString("import sys
\nprint 'hello'","<string.py>",Py_file_input);
PyMarshal_WriteObjectToFile((PyObject *)op, fp,
Py_MARSHAL_VERSION);

Py_Finalize();

return 0;
}

This Code crashs on Windows, and I can't explain why. I want to
convert a PyCodeObject to a PyObject and save it to the harddisk.
PyMarshal_ReadObjectFromFile(FILE *P) crashs too if I want to read a
byte-compiled object.


Thank your for your help.

donnerChecker

 

[Guest]

Hi! Please remember, that the script crashs on Line
PyMarshal_WriteObjectToFile. :-(

 

[Gabriel Genellina]

En Sun, 14 Sep 2008 08:28:01 -0300,

int main (int argc, char * const argv[]) {
Py_Initialize();

FILE* fp = fopen("/Users/test/Desktop/123.pyc","wb");
PyCodeObject* op = (PyCodeObject*)Py_CompileString("import sys
\nprint 'hello'","<string.py>",Py_file_input);
PyMarshal_WriteObjectToFile((PyObject *)op, fp,
Py_MARSHAL_VERSION);

Py_Finalize();

return 0;
}

This Code crashs on Windows, and I can't explain why. I want to
convert a PyCodeObject to a PyObject and save it to the harddisk.
PyMarshal_ReadObjectFromFile(FILE *P) crashs too if I want to read a
byte-compiled object.

Your code should check every operation for errors. fopen may return NULL,
Py_CompileString may fail and return NULL, PyMarshal_xxx might fail
(although it's not documented).

Why "123.pyc"? Do you want to generate a compiled module? Use the
py_compile standard module instead (or write equivalent C code, or see how
import.c does that)

 

[Guest]

Hi!

I shortened the quode. Everything should be all right and nothing is a
NULL Pointer.
What about PyMarshal_ReadObjectFromFile(FILE* p), this crashs too :-/
hm...

the problem is, on mac everything is all right..

thanks...

 

[Guest]

Hi!

Any ideas on it?

 

[Fredrik Lundh]

I shortened the quode. Everything should be all right and nothing is a
NULL Pointer. What about PyMarshal_ReadObjectFromFile(FILE* p), this
> crashs too :-/

the layout of the "FILE" structure isn't standardized. make sure you're
linking everything with the same runtime library.

</F>

 

[Tim Golden]

Hi!

Any ideas on it?

(Haven't got the original post in front of
me, but I'll guess anyway...)

Was the Python you're using built with one compiler
and runtime, while the extension / embedee you're
building is built with another? I ask because the
most frequently-touted example of cross-compiler
or cross-runtime incompatibility on Windows is the
FILE* structure. And I seem to remember you're using
that to write the marshalled objects out....

.... just a wild guess

TJG