Bug 588678 - gcc emits incorrect unwind info on i?86/x86_64
gcc emits incorrect unwind info on i?86/x86_64
Status: CLOSED ERRATA
Product: Fedora
Classification: Fedora
Component: gcc (Show other bugs)
13
All Linux
low Severity medium
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Assigned To: Jakub Jelinek
Fedora Extras Quality Assurance
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Depends On:
Blocks: F13Target
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Reported: 2010-05-04 05:25 EDT by Jakub Jelinek
Modified: 2010-05-05 03:23 EDT (History)
1 user (show)

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Fixed In Version: gcc-4.4.4-2.fc13
Doc Type: Bug Fix
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Last Closed: 2010-05-05 03:23:58 EDT
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RHEL 7.3 requirements from Atomic Host:


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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.

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