[Valgrind-users] Valgrind barfs when my program preloads malloc

[Rob J. <ja...@cs...>]

All,

I wrote a discrete-event simulator that requires intercepting several
system calls via LD_PRELOAD. (https://shadow.cs.umn.edu). When I intercept
malloc, and run my program through valgrind, it barfs with the error:

"valgrind: Cannot continue: malloc of new_line failed."

My command is something like:
LD_PRELOAD=/path/to/mypreload.so /usr/bin/valgrind /path/to/myprogram...

where mypreload.so contains the malloc() that I am intercepting. The
printf() in my implementation of malloc never gets triggered.

$ uname -a
Linux thor 3.4.6-2.fc17.x86_64 #1 SMP Thu Jul 19 22:54:16 UTC 2012 x86_64
x86_64 x86_64 GNU/Linux

$ valgrind --version
valgrind-3.7.0

I am wondering if there is a way to tell valgrind that I want to set a
library in the LD_PRELOAD env variable AFTER the valgrind initialization is
done but BEFORE my program is run. It seems like this could be a useful
feature for programs that intercept malloc(). What are the options for
programs that want to LD_PRELOAD malloc and run valgrind at the same time?

Regards,
Rob