Bug 227231

Summary:	libdwfl dwfl_module_addrname can't find symbol name for symbols with st_size=0.
Product:	Red Hat Enterprise Linux 5	Reporter:	Roland McGrath <roland>
Component:	elfutils	Assignee:	Roland McGrath <roland>
Status:	CLOSED ERRATA	QA Contact:	David Lawrence <dkl>
Severity:	medium	Docs Contact:
Priority:	medium
Version:	5.0	CC:	drepper, ebachalo
Target Milestone:	---	Keywords:	Reopened
Target Release:	---
Hardware:	All
OS:	Linux
Whiteboard:
Fixed In Version:	0.126	Doc Type:	Bug Fix
Doc Text:		Story Points:	---
Clone Of:		Environment:
Last Closed:	2009-04-15 10:13:58 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:
Bug Depends On:	227167
Bug Blocks:	173278

Description Roland McGrath 2007-02-03 19:41:04 UTC

+++ This bug was initially created as a clone of Bug #227167 +++

Description of problem:
calling dwfl_module_addrname on a symbol with a st_size of 0 returns null when
it should return the symbol size.

Version-Release number of selected component (if applicable):
0.125

How reproducible:
always.

Steps to Reproduce:
1. Create assembly test with code for a function with no symbol size. That
segfaults.
2. Run the program and try to get a backtrace using dwfl_module_addrname.
  
Actual results:
Get null.

Expected results:
Get foo().

Additional info:
Check out the patch for a possible solution.

-- Additional comment from npremji on 2007-02-02 16:30 EST --
Created an attachment (id=147253)
Patch to implement finding addrname of functions with st_size=0.


-- Additional comment from npremji on 2007-02-02 16:32 EST --
Created an attachment (id=147254)
A program with a function foo with st_size = 0, that segfaults in foo.


-- Additional comment from roland on 2007-02-03 14:39 EST --
I've done a different fix.

Comment 2 RHEL Program Management 2007-06-05 20:38:23 UTC

This request was evaluated by Red Hat Product Management for
inclusion in a Red Hat Enterprise Linux release.  Since this
bugzilla is in a component that is not approved for the current
release, it has been closed with resolution deferred.  You may
reopen this bugzilla for consideration in the next release.

Comment 6 Roland McGrath 2009-04-15 10:13:58 UTC

This was fixed in 5.3 (-0.137-3.el5)