Bug 151568 – gdb breaks valgrind

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Bug 151568 - gdb breaks valgrind

Summary:	gdb breaks valgrind

Status:	CLOSED NOTABUG

Aliases:	None

Product:	Fedora
Classification:	Fedora
Component:	gdb (Show other bugs)
Sub Component:
Version:	4
Hardware:	i386 Linux

Priority	medium Severity medium
Target Milestone:	---
Target Release:	---
Assigned To:	Jan Kratochvil
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Depends On:
Blocks:
	Show dependency tree / graph

Reported:	2005-03-19 17:50 EST by Robin Green
Modified:	2007-11-30 17:11 EST (History)
CC List:	2 users (show)

See Also:
Fixed In Version:
Doc Type:	Bug Fix
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Story Points:	---
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Environment:
Last Closed:	2006-08-20 10:53:30 EDT
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Attachments	(Terms of Use)
.gdbinit script configuring SIGSEGV handling for gdb(1) (169 bytes, text/plain) 2006-06-23 10:41 EDT, Jan Kratochvil	no flags	Details
Add an attachment (proposed patch, testcase, etc.)

Groups: None (edit)

Description Robin Green 2005-03-19 17:50:24 EST

Description of problem:
When valgrind is run under gdb, it does not work

Version-Release number of selected component (if applicable):
gdb-6.3.0.0-0.29

How reproducible:
Every time

Steps to Reproduce:
1. gdb --args /usr/bin/valgrind --tool=memcheck ls
2. run
3.
  
Actual results:
==10187== Memcheck, a memory error detector for x86-linux.
==10187== Copyright (C) 2002-2004, and GNU GPL'd, by Julian Seward et al.
==10187== Using valgrind-2.2.0, a program supervision framework for x86-linux.
==10187== Copyright (C) 2000-2004, and GNU GPL'd, by Julian Seward et al.
==10187== For more details, rerun with: -v
==10187==

Program received signal SIGSEGV, Segmentation fault.
0xb0892c03 in ?? ()


Expected results:
Should work as normal
Additional info: valgrind-2.2.0-8

Comment 1 Robin Green 2005-03-22 10:24:47 EST

This issue also occurs on a fresh install on FC3 with all updates applied.

Comment 2 Rob Sherwood 2005-07-04 13:28:09 EDT

The same thing happens to me.  I bounced a message about this to the
valgrind-users list, and no one had any ideas.  I was able to work around it by
compiling my own gdb (v 6.3) from the original gnu source, and then forcing
valgrind to use that (which you probably already thought of, but it was worth
mentioning just in case).  So, presumably the problem lies in redhat's patches
to gdb.

Comment 3 Rob Sherwood 2005-07-04 13:31:11 EDT

Also, when you run `valgrind --attach-db=yes --tool=memcheck ./foo`, when
valgrind hits a fault and attaches gdb, then the debugging symbols are all
trashed.  Presumably these are symptoms to the same problem.

Comment 4 Jan Kratochvil 2006-06-23 10:41:29 EDT

Created attachment 131436 [details]
.gdbinit script configuring SIGSEGV handling for gdb(1)

Tested on Fedora Core 5 gdb-6.3.0.0-1.122 and valgrind-3.1.0-2.
While I do not find much useful to debug the whole valgrind(1) wrapper you need
to configure SIGSEGV handling for gdb as it is used internally by valgrind.
Attached script (non)reproducibility by: gdb -nx
--command=/tmp/pr151568.gdbinit

Comment 5 Robin Green 2006-08-20 10:53:30 EDT

You're right - I just didn't configure SIGSEGV handling.

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