Bug 681190

Description of problem:
Running any userpspace tracing script on s390x shows errors like this when running:

Pass 5: starting run.
ERROR: Build-id mismatch: "write" vs. "write" byte 0 (0x64 vs 0x00) rc 0 -14
ERROR: Build-id mismatch: "write" vs. "write" byte 0 (0x64 vs 0x00) rc 0 -14

The tracing script actually seems to run fine, but the ERRORs are confusing. Also, this didn't happen with RHEL6.0, so this is a regression. Not sure if this is caused by elfutils or systemtap. 


Version-Release number of selected component (if applicable):
systemtap-1.4-3.el6.s390x

How reproducible:
always

Steps to Reproduce:
1. gcc write.c -o write -g
2. stap -c ./write user.stp -v
3. 
  
Actual results:
(...)
Pass 5: starting run.
ERROR: Build-id mismatch: "write" vs. "write" byte 0 (0x64 vs 0x00) rc 0 -14
ERROR: Build-id mismatch: "write" vs. "write" byte 0 (0x64 vs 0x00) rc 0 -14
Begin
Function enter
Function return
End
Pass 5: run completed in 0usr/50sys/123real ms.
Pass 5: run failed.  Try again with another '--vp 00001' option.

Expected results:
(...)
Pass 5: starting run.
Begin
Function enter
Function return
End
Pass 5: run completed in 0usr/50sys/123real ms.
Pass 5: run failed.  Try again with another '--vp 00001' option.

Additional info:
# cat write.c 
#include <stdio.h>

int write_fctn(int a){
  FILE *fp = fopen("stuff.tmp", "w");
  fprintf(fp, "Written %d\n", a);
  close(fp);
  return a;
}


int main(int argc, char **argv){
  write_fctn(1);
  return 0;
}

# cat user.stp 
probe begin{
  printf("Begin\n");
}

probe process("./write").function("write_fctn"){
  printf("Function enter\n");
}

probe process("./write").function("write_fctn").return{
  printf("Function return\n");
}

probe end{
  printf("End\n");
}