Intercept calls to pthread_mutex_lock

[Umesh__Deepthi]

Hi All,

I would want to profile multithreaded program and find out if threre was a contention for mutex by threads.

If a thread is going to operate on some mutex, the thread needs to call corresponding pthread functions, like pthread_mutex_lock.  I should be able to redirect the execution of these functions, as in wrap before and after the execution of these functions, where I can get the parameters and return values.

 how to intercept calls to pthread_mutex_lock. doing something like  #define pthread_mutex_lock my_pthread_mutex_lock?

Kindly throw some light on this.I request you to help me out.

Thank you in advance.

Regards,

Deepthi

[Travis_D_]

This doesn't have much to do with Intel, but you can Google for "symbol interposition" or something like that. One way is to use LD_LIBRARY_PRELOAD on Unix-like with a library that redefines the symbols. You can also look at uprobes and similar.