[Valgrind-users] Address 0xXYZ is on thread 1's stack

[Balazs R. <ba...@ra...>]

First of all let me thank you guys for valgrind; it's been a life saver 
many times for me, begining C programmer.

There's only one thing I cannot figure out: I get this error in my 
program:

==7819== Warning: client switching stacks?  %esp: 0xBFFFF4FC --> 0xBFC2EBB4
==7819== 1 errors in context 1 of 24:
==7819== Invalid write of size 4
==7819==    at 0x8049F69: create_cache_file (test.c:480)
==7819==    Address 0xBFC2EBD0 is on thread 1's stack

I'm not using any threads; my program crunches numbers. I get these 
errors after malloc-ing a huge chunk of memory; that's what triggers 
the 'client switching stacks' message. Is it a glitch in valgrind or am 
I compiling my program with incorrect switches ?

I've got valgrind-2.0.0 and a stock Mandrake 9.1 system with 
2.4.21-0.13mdk kernel.

Thanks,

Balazs