pthread_create/gcc/gcc-libc bug?

[Juan Carlos Franzoy]

Hi.

I'm having problems trying to create a thread with a user supplied
stack in a shared object. I get a "segmentation fault". The error does
not happen if there are no shared objects involved.

The detail is:
- I have a "d.cpp" source with a main() that calls my_pthread_create in a shared object "c.so"
- my_pthread_create in "c.cpp":
  - I malloc 1MB + a page size bytes
  - set the pointer to the pthread_attr_t object with pthread_set_stack( ptr, 1MB )
  - call pthread_create
- crash!

The question is: what is the problem? Am I doing something wrong?

In the attachement I send the sources and a readme with the output of
gcc -v, uname -a and a stack trace of the failure.

Thanks. 
------------------------------------------------------------
                      Juan Carlos Franzoy
                     Analista  Programador
                     Tel: +54-11-4780-2634
                  mailto:JCFranzoy@ats.com.ar
                     http://www.ats.com.ar
------------------------------------------------------------




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