On Thu, Aug 1, 2013 at 9:28 PM, Stefan Seefeld <[email protected]> wrote: > I don't think any of this works. The ultimate problem is the one Jérémie > reported initially: dlsym will eventually call free() on the memory > calloc() returned, so my calloc fallback needs to return something that > can actually be freed.
I pointed out how free() will be safe specifically: >> dlsym stores pointer to calloc'ed buffer, overwriting the pointer to mmap'ed >> buffer, completing initialization for the second time and making the >> subsequent free() safe. Besides, you're intercepting free() in your LD_PRELOAD module as well, so you can just catch attempts to free your mmap'ed buffers there and munmap them safely. Alexander _______________________________________________ lttng-dev mailing list [email protected] http://lists.lttng.org/cgi-bin/mailman/listinfo/lttng-dev
