Bug 588678

Summary: gcc emits incorrect unwind info on i?86/x86_64
Product: [Fedora] Fedora Reporter: Jakub Jelinek <jakub>
Component: gccAssignee: Jakub Jelinek <jakub>
Status: CLOSED ERRATA QA Contact: Fedora Extras Quality Assurance <extras-qa>
Severity: medium Docs Contact:
Priority: low    
Version: 13CC: jakub
Target Milestone: ---   
Target Release: ---   
Hardware: All   
OS: Linux   
Whiteboard:
Fixed In Version: gcc-4.4.4-2.fc13 Doc Type: Bug Fix
Doc Text:
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Clone Of: Environment:
Last Closed: 2010-05-05 03:23:58 EDT Type: ---
Regression: --- Mount Type: ---
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oVirt Team: --- RHEL 7.3 requirements from Atomic Host:
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Bug Depends On:    
Bug Blocks: 507684    

Description Jakub Jelinek 2010-05-04 05:25:33 EDT
As mentioned in:
http://lists.dwarfstd.org/private.cgi/dwarf-discuss-dwarfstd.org/2010-April/000847.html
http://gcc.gnu.org/ml/gcc-patches/2010-04/msg01422.html
and following threads, GCC generates invalid unwind info on i?86/x86_64, where DW_OP_cfa_def_cfa_expression is followed by DW_OP_cfa_def_cfa_{register,offset{,_sf}} and thus either the CFA offset or register is undefined.  It is not possible to unwind through such code then.
Comment 1 Fedora Update System 2010-05-04 05:30:25 EDT
gcc-4.4.4-2.fc13,libtool-2.2.6-20.fc13 has been submitted as an update for Fedora 13.
http://admin.fedoraproject.org/updates/gcc-4.4.4-2.fc13,libtool-2.2.6-20.fc13
Comment 2 Fedora Update System 2010-05-04 19:52:21 EDT
gcc-4.4.4-2.fc13, libtool-2.2.6-20.fc13 has been pushed to the Fedora 13 testing repository.  If problems still persist, please make note of it in this bug report.
 If you want to test the update, you can install it with 
 su -c 'yum --enablerepo=updates-testing update gcc libtool'.  You can provide feedback for this update here: http://admin.fedoraproject.org/updates/gcc-4.4.4-2.fc13,libtool-2.2.6-20.fc13
Comment 3 Fedora Update System 2010-05-05 03:23:50 EDT
gcc-4.4.4-2.fc13, libtool-2.2.6-20.fc13 has been pushed to the Fedora 13 stable repository.  If problems still persist, please make note of it in this bug report.