[Valgrind-users] Beginner hg question: mapping address to the variable

[Raghu R. <rag...@no...>]

This is a newbie question, so please bear with me.  J

 

The environment is the following:

Running on an Intel Westmere processor

Red Hat Enterprise Linux Server release 6.4 (Santiago)

Linux fe5 2.6.32-279.32.1.el6.x86_64 #1 SMP Wed Jun 19 05:25:09 EDT 2013
x86_64 x86_64 x86_64 GNU/Linux

Ifort Version 12.0.4

 

Upon running the application I am seeing some messages such as:

 

==20741== ----------------------------------------------------------------

==20741==

==20741== Possible data race during read of size 4 at 0x420A080 by thread #3

==20741== Locks held: none

==20741==    at 0x40B55AD: __kmp_wait_sleep (in
/apps/intel/composerxe-2011.4.191/composerxe-2011.4.191/compiler/lib/intel64
/libiomp5.so)

==20741==    by 0x40B09AF: __kmp_fork_barrier(int, int) (in
/apps/intel/composerxe-2011.4.191/composerxe-2011.4.191/compiler/lib/intel64
/libiomp5.so)

==20741==    by 0x40B0028: __kmp_launch_thread (in
/apps/intel/composerxe-2011.4.191/composerxe-2011.4.191/compiler/lib/intel64
/libiomp5.so)

==20741==    by 0x40D2638: ??? (in
/apps/intel/composerxe-2011.4.191/composerxe-2011.4.191/compiler/lib/intel64
/libiomp5.so)

==20741==    by 0x4C2D0D4: mythread_wrapper (hg_intercepts.c:219)

==20741==    by 0x7E74850: start_thread (in /lib64/libpthread-2.12.so)

==20741==    by 0xF64F6FF: ???

==20741==

==20741== This conflicts with a previous write of size 4 by thread #2

==20741== Locks held: none

==20741==    at 0x40D337B: ??? (in
/apps/intel/composerxe-2011.4.191/composerxe-2011.4.191/compiler/lib/intel64
/libiomp5.so)

==20741==    by 0x4C2D0D4: mythread_wrapper (hg_intercepts.c:219)

==20741==    by 0x7E74850: start_thread (in /lib64/libpthread-2.12.so)

==20741==    by 0x7BE16FF: ???

==20741==

 

My question is, how do I find the variable located at the address 0x420A080?
The code was ready compiled with -g option, so I was wondering why it was
unable to point me to the variable.  What can I do to get the actual
variable name or the location where if this is happening?

 

Thanks,

 

--Raghu