breakpoints/2332: watchpoints silently don't work on Opteron

>Number:         2332
>Category:       breakpoints
>Synopsis:       watchpoints silently don't work on Opteron
>Confidential:   no
>Severity:       serious
>Priority:       high
>Responsible:    unassigned
>State:          open
>Class:          change-request
>Submitter-Id:   net
>Arrival-Date:   Thu Oct 11 19:18:01 UTC 2007
>Closed-Date:
>Last-Modified:
>Originator:     yuri@xxxxxxxxx
>Release:        gdb-6.7
>Organization:
>Environment:

>Description:
I am trying to set watchpoint on my Opteron (see log below).
Though this value has been changed watchpoint didn't occur.

gdb should either catch watchpoint or tell the user that watchpoints don't work 
and why they don't work when user sets a watchpoint.

Otherwise it looks completely broken.



My OS is:
Linux jf031 2.4.21-37.ELsmp #1 SMP Wed Sep 7 13:32:18 EDT 2005 x86_64 unknown

gdb log is:
Starting program: /home/yuriv/sandbox-mainline-last/libserv/test/w

Breakpoint 1, main () at w.C:8
8         int i = 1;
(gdb) n
9         f(&i);
(gdb) p &i
$1 = (int *) 0x7fbfffeb0c
(gdb) watch 0x7fbfffeb0c
Watchpoint 2: 548682066700
(gdb) c
Continuing.

Program exited with code 02.
(gdb)
>How-To-Repeat:
void f(int *i) { *i = 2; }

main() {
  int i = 1;
  f(&i);
  return (i);
}
>Fix:
n/a
>Release-Note:
>Audit-Trail:
>Unformatted: