bugThe GNU Hurd - Bugs: bug #29642, gdb: breakpoints in triggered in...


bug #29642: gdb: breakpoints in triggered in other threads result in SIGTRAP

Submitted by:  Carl Fredrik Hammar <hammy>
Submitted on:  Thu 22 Apr 2010 02:38:30 PM UTC  
Category:  None Severity:  3 - Normal
Priority:  5 - Normal Item Group:  None
Status:  None Privacy:  Public
Assigned to:  None Originator Name: 
Open/Closed:  Open Reproducibility:  None
Size (loc):  None Planned Release:  None
Effort:  0.00
Wiki-like text discussion box: 

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Fri 23 Apr 2010 09:21:05 AM UTC, comment #2:

Yes, it is reproducible with cthreads.
In fact, I encountered the bug while debugging a cthreads program.
(I knew I forgot to mention something...)

I just now also confirmed that it is reproducible with a minimal example
to make sure it wasn't something particular to that program.

Carl Fredrik Hammar <hammy>
Project Member
Fri 23 Apr 2010 07:29:34 AM UTC, comment #1:

Is this reproducable with the equivalent cthreads code? It may well be that we have to teach GDB about pthreads.

Thomas Schwinge <tschwinge>
Project Administrator
Thu 22 Apr 2010 02:38:30 PM UTC, original submission:

When debugging a multithreaded program with gdb, breakpoints triggered in
separate threads results in a SIGTRAP as if it was a regular terminating
signal. For instance, with the program:

the bug can be like this:

There are no problems when all the breakpoints are in main(). I have
only tested with gdb 7.0.1-2 from Debian.

Carl Fredrik Hammar <hammy>
Project Member


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