Bug 750341
| Summary: | gdb crashes on some dwarf2 executables | ||||||||||
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| Product: | Red Hat Enterprise Linux 6 | Reporter: | Konstantin Volkov <wolf> | ||||||||
| Component: | gdb | Assignee: | Jan Kratochvil <jan.kratochvil> | ||||||||
| Status: | CLOSED ERRATA | QA Contact: | qe-baseos-tools-bugs | ||||||||
| Severity: | unspecified | Docs Contact: | |||||||||
| Priority: | unspecified | ||||||||||
| Version: | 6.1 | CC: | jan.kratochvil, mpolacek, pmuller | ||||||||
| Target Milestone: | rc | ||||||||||
| Target Release: | --- | ||||||||||
| Hardware: | All | ||||||||||
| OS: | Linux | ||||||||||
| Whiteboard: | |||||||||||
| Fixed In Version: | gdb-7.2-51.el6 | Doc Type: | Bug Fix | ||||||||
| Doc Text: | Story Points: | --- | |||||||||
| Clone Of: | Environment: | ||||||||||
| Last Closed: | 2012-06-20 14:29:39 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: | |||||||||||
| Attachments: |
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Could you provide a reproducer for the crash? "dwarf2 with null symtab" is too ambiguous to blindly try some. (In reply to comment #1) > Could you provide a reproducer for the crash? I'll attach it tomorrow. Thanx! Created attachment 531559 [details]
Source code of crash-example
Created attachment 531560 [details]
Binary of crash-example
It has been fixed upstream by:
ad387dddfa899b9ef76e3c2420b163e0ca47fe16 is the first bad (=good) commit
commit ad387dddfa899b9ef76e3c2420b163e0ca47fe16
Author: Aleksandar Ristovski <aristovski>
Date: Thu Oct 20 20:06:11 2011 +0000
* cp-namespace.c (cp_scan_for_anonymous_namespaces): Changed function
arguments by adding OBJFILE. Instead of getting objfile from
symbol's symtab, use new argument OBJFILE.
* cp-support.h (cp_scan_for_anonymous_namespaces): Changed function
arguments by adding OBJFILE.
* gdb/dwarf2read.c (new_symbol_full): Change call to
cp_scan_for_anonymous_namespaces to match new signature.
* gdb/stabsread.c (define_symbol): Change call to
cp_scan_for_anonymous_namespaces to match new signature.
To ensure it gets backported you should contact your RHEL support services.
[patch] gdb crash in cp_scan_for_anonymous_namespace http://sourceware.org/ml/gdb-patches/2011-10/msg00570.html [commit] testsuite: New gdb.dwarf2/dw2-namespaceless-anonymous.exp http://sourceware.org/ml/gdb-patches/2012-01/msg00511.html QA: New testcase: gdb.dwarf2/dw2-namespaceless-anonymous.exp Since the problem described in this bug report should be resolved in a recent advisory, it has been closed with a resolution of ERRATA. For information on the advisory, and where to find the updated files, follow the link below. If the solution does not work for you, open a new bug report. http://rhn.redhat.com/errata/RHBA-2012-0930.html |
Created attachment 531015 [details] Patch that fix the crash Description of problem: gdb crashes on some dwarf2 executables with NULL symtab Version-Release number of selected component (if applicable): gdb-7.2-48.el6 How reproducible: 100% Steps to Reproduce: 1. Build the dwarf2 with null symtab 2. Run gdb 3. Crash Actual results: Crash Expected results: Don't crash Additional info: With this small patch all is OK. Please, apply: --- --- gdb-7.3/gdb/dwarf2read.c.orig 2011-10-27 16:11:01.000000000 +0400 +++ gdb-7.3/gdb/dwarf2read.c 2011-10-27 16:11:09.000000000 +0400 @@ -11444,7 +11444,8 @@ new_symbol_full (struct die_info *die, s /* For the benefit of old versions of GCC, check for anonymous namespaces based on the demangled name. */ if (!processing_has_namespace_info - && cu->language == language_cplus) + && cu->language == language_cplus + && sym->symtab) cp_scan_for_anonymous_namespaces (sym); } return (sym); ---