Bug 618637

Summary:	gdb crashed when I tried to set breakpoint
Product:	[Fedora] Fedora	Reporter:	Martin Stransky <stransky>
Component:	gdb	Assignee:	Jan Kratochvil <jan.kratochvil>
Status:	CLOSED DUPLICATE	QA Contact:	Fedora Extras Quality Assurance <extras-qa>
Severity:	medium	Docs Contact:
Priority:	low
Version:	rawhide	CC:	jan.kratochvil, pmuldoon
Target Milestone:	---
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Hardware:	All
OS:	Linux
Whiteboard:
Fixed In Version:		Doc Type:	Bug Fix
Doc Text:		Story Points:	---
Clone Of:		Environment:
Last Closed:	2010-07-27 22:26:36 UTC	Type:	---
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Documentation:	---	CRM:
Verified Versions:		Category:	---
oVirt Team:	---	RHEL 7.3 requirements from Atomic Host:
Cloudforms Team:	---	Target Upstream Version:
Embargoed:

Description Martin Stransky 2010-07-27 12:43:57 UTC

Description of problem:

gdb crashed when I tried to set breakpoint,
core file - http://people.redhat.com/stransky/gdb/core.27654.tar.bz

Version-Release number of selected component (if applicable):
gdb-7.1.90.20100721-5.fc14.i686

How reproducible:
Always

Steps to Reproduce:
1. build spice-xpi plugin, install it to firefox
2. firefox -g -d gdb
3. (gdb) r
4. CTRL+C
5. (gdb) b SpiceController::Connect
6. crash
  
Additional info:
I debugged a working version of firefox-4beta2 so it may not be reproducible with our stock firefox.

Comment 1 Martin Stransky 2010-07-27 12:44:46 UTC

note: (gdb) b controller.cpp:50 (the same place) works as expected.

Comment 2 Jan Kratochvil 2010-07-27 13:24:22 UTC

That core file is not readable.

$ file core.27654.tar.bz 
core.27654.tar.bz: data
$ gzip <core.27654.tar.bz |wc -c
53319
$ od -c core.27654.tar.bz |head -n3
0000000  \0  \0  \0  \0  \0  \0  \0  \0  \0  \0  \0  \0  \0  \0  \0  \0
*
140400000 207 215 371 347   _ 371 233 246 327 211   k 316 201   K 226 214

OTOH I have some similar Bug on internal error on placing a breakpoint, I cannot find it now.

Comment 3 Martin Stransky 2010-07-27 13:31:59 UTC

ahh, sory, it's not gzip but b2zip.

Comment 4 Jan Kratochvil 2010-07-27 13:36:18 UTC

No package /usr/bin/b2zip available.

.bz should be bzip but it is not bzip (and I cannot find bzip in Fedora repo).

Any compression program cannot produce 25MB file mostly full of zeroes. :-)

Comment 5 Martin Stransky 2010-07-27 13:45:06 UTC

Hm, it looks like it was cut by quota at people.redhat.com. Unfortunately I don't have a backup copy. Will try to produce another one.

Comment 6 Martin Stransky 2010-07-27 13:47:48 UTC

(gdb) b SpiceController::Connect
../../gdb/breakpoint.c:7295: internal-error: expand_line_sal_maybe: Assertion `found' failed.
A problem internal to GDB has been detected,
further debugging may prove unreliable.
Quit this debugging session? (y or n) n

../../gdb/breakpoint.c:7295: internal-error: expand_line_sal_maybe: Assertion `found' failed.
A problem internal to GDB has been detected,
further debugging may prove unreliable.
Create a core file of GDB? (y or n) y

Comment 7 Jan Kratochvil 2010-07-27 22:26:36 UTC


*** This bug has been marked as a duplicate of bug 612253 ***