Bug 801775

Summary: Unexpected error setting watchpoint
Product: Red Hat Enterprise Linux 7 Reporter: Marek Polacek <mpolacek>
Component: gdbAssignee: Jan Kratochvil <jan.kratochvil>
Status: CLOSED CURRENTRELEASE QA Contact: Miroslav Franc <mfranc>
Severity: high Docs Contact:
Priority: unspecified    
Version: 7.0CC: jan.kratochvil, mcermak, mfranc, ohudlick
Target Milestone: rc   
Target Release: ---   
Hardware: ppc64   
OS: Unspecified   
Whiteboard:
Fixed In Version: Doc Type: Bug Fix
Doc Text:
Story Points: ---
Clone Of: Environment:
Last Closed: 2014-06-13 12:58:43 UTC Type: ---
Regression: --- Mount Type: ---
Documentation: --- CRM:
Verified Versions: Category: ---
oVirt Team: --- RHEL 7.3 requirements from Atomic Host:
Cloudforms Team: --- Target Upstream Version:

Description Marek Polacek 2012-03-09 13:28:47 UTC
Description of problem:
GDB fails to continue after setting a watchpoint.

Version-Release number of selected component (if applicable):
# rpm -q gdb
gdb-7.3.50.20110722-11.el7.ppc64

How reproducible:
always

Steps to Reproduce:
# cat z.c
static int p;
int
main (void)
{
  p = 2;
  return 0;
}

# gcc z.c -g
# gdb -q ./a.out 
Reading symbols from /root/gdb/Sanity/basic-smoke-test/a.out...done.
(gdb) b main
Breakpoint 1 at 0x100004fc: file z.c, line 5.
(gdb) r
Starting program: /root/gdb/Sanity/basic-smoke-test/a.out 

Breakpoint 1, main () at z.c:5
5	  p = 2;
(gdb) watch p
Hardware watchpoint 2: p
(gdb) c
Continuing.
Unexpected error setting breakpoint or watchpoint: Invalid argument.
0x0000000010000500 in main () at z.c:5
5	  p = 2;

On x86_64 this isn't happening.

Comment 1 Jan Kratochvil 2012-03-09 13:36:13 UTC
non-x86* watchpoints are very broken now, archer-jankratochvil-watchpoint3 has been updated only for x86* but not yet for non-x86* archs.
I did not expect anyone would use it from Fedora...

Comment 2 Jan Kratochvil 2012-03-09 14:55:54 UTC
I have reproduced the problem with gdb-7.3.50.20110722-11.el7.ppc64.
I have tried to build gdb-7.4.50.20120120-29.fc17.ppc64 and it works OK.
->NOTABUG
Unaware why RHEL-7 is using so obsolete packages.

Comment 8 Ludek Smid 2014-06-13 12:58:43 UTC
This request was resolved in Red Hat Enterprise Linux 7.0.

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