Bug 227167

Summary: libdwfl dwfl_module_addrname can't find symbol name for symbols with st_size=0.
Product: [Fedora] Fedora Reporter: Nurdin Premji <npremji>
Component: elfutilsAssignee: Roland McGrath <roland>
Status: CLOSED ERRATA QA Contact:
Severity: medium Docs Contact:
Priority: medium    
Version: 6CC: drepper
Target Milestone: ---   
Target Release: ---   
Hardware: All   
OS: Linux   
Whiteboard:
Fixed In Version: 0.126-1.fc6 Doc Type: Bug Fix
Doc Text:
Story Points: ---
Clone Of: Environment:
Last Closed: 2007-02-19 01:26:19 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:    
Bug Blocks: 227231    
Attachments:
Description Flags
Patch to implement finding addrname of functions with st_size=0.
none
A program with a function foo with st_size = 0, that segfaults in foo. none

Description Nurdin Premji 2007-02-02 21:30:12 UTC
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.

Comment 1 Nurdin Premji 2007-02-02 21:30:12 UTC
Created attachment 147253 [details]
Patch to implement finding addrname of functions with st_size=0.

Comment 2 Nurdin Premji 2007-02-02 21:32:07 UTC
Created attachment 147254 [details]
A program with a function foo with st_size = 0, that segfaults in foo.

Comment 3 Roland McGrath 2007-02-03 19:39:20 UTC
I've done a different fix.