Bug 40936
| Summary: | Disable hardware watchpoint locks up machine. | ||
|---|---|---|---|
| Product: | [Retired] Red Hat Linux | Reporter: | hjl |
| Component: | gdb | Assignee: | Trond Eivind Glomsrxd <teg> |
| Status: | CLOSED WORKSFORME | QA Contact: | Aaron Brown <abrown> |
| Severity: | medium | Docs Contact: | |
| Priority: | medium | ||
| Version: | 7.1 | ||
| Target Milestone: | --- | ||
| Target Release: | --- | ||
| Hardware: | i386 | ||
| OS: | Linux | ||
| Whiteboard: | |||
| Fixed In Version: | Doc Type: | Bug Fix | |
| Doc Text: | Story Points: | --- | |
| Clone Of: | Environment: | ||
| Last Closed: | 2001-05-16 21:30:31 UTC | Type: | --- |
| Regression: | --- | Mount Type: | --- |
| Documentation: | --- | CRM: | |
| Verified Versions: | Category: | --- | |
| oVirt Team: | --- | RHEL 7.3 requirements from Atomic Host: | |
| Cloudforms Team: | --- | Target Upstream Version: | |
| Embargoed: | |||
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Description
hjl
2001-05-16 17:45:19 UTC
Could you give an example? (and please try the new gdb version (5.0rh-9 or higher) at http://people.redhat.com/teg/gdb/ ) The new gdb does the same.
# cat gdb.c
int x = 0;
foo ()
{
x = 1;
}
bar ()
{
x = 2;
}
main ()
{
foo ();
bar ();
}
# gcc -g gdb.c
# gdb a.out
(gdb) watch x
(gdb) r
Starting program: /home/hjl/tmp/a.out
Hardware watchpoint 1: x
Hardware watchpoint 1: x
Hardware watchpoint 1: x
Old value = 0
New value = 1
foo () at gdb.c:6
6 }
(gdb) c
Continuing.
Hardware watchpoint 1: x
Old value = 1
New value = 2
bar () at gdb.c:11
11 }(gdb) c
Continuing.
Program exited with code 01.
(gdb) dis 1
(gdb) r
Starting program: /home/hjl/tmp/a.out
My SMP machine locks up at this point. It works fine on UP machine. It may be
a kernel bug. Can you try that on your SMP machine?
Doesn't happen on my machine... I'll try another later. I've tried it on another SMP machine, this time with our standard kernel: It doesn't crash there either... |