Description of problem:
The process is stopped by pstack

Version-Release number of selected component (if applicable):
2.6.9-55.ELsmp
gdb-6.3.0.0-1.143.el4

How reproducible:
Always

Steps to Reproduce:

t.c:
   #include <sys/stat.h>
   int main(int argc, char *argv[])
   {
     struct stat b1;
     while(1) { stat("/", &b1); }
   }


1. 'cc t.c' and run a.out
2. strace -p <pid> (where pid is the process id for the a.out process)
3. stop strace with CTRL-C
4. pstack <pid>
  
Actual results:
a.out is stopped

Expected results:
a.out should keep running