Bug 1026919 - Symbolizing the backtrace is not easy enough
Symbolizing the backtrace is not easy enough
Product: Fedora
Classification: Fedora
Component: gcc (Show other bugs)
Unspecified Linux
unspecified Severity unspecified
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Assigned To: Jakub Jelinek
Fedora Extras Quality Assurance
Depends On:
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Reported: 2013-11-05 11:22 EST by Jan Kratochvil
Modified: 2015-02-17 14:04 EST (History)
2 users (show)

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Doc Type: Bug Fix
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Last Closed: 2015-02-17 14:04:23 EST
Type: Bug
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Description Jan Kratochvil 2013-11-05 11:22:12 EST
Description of problem:
-fsanitize=address is great but its default numerical backtrace is inconvenient. GDB is no help as the associated backtraces like "allocated by thread T0 here" are no longer in the active stack.

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

How reproducible:

Steps to Reproduce:
echo -e '#include <stdlib.h>\nint main(void){char *p=malloc(1);return p[2]=0;}'|gcc -Wall -g -x c - -fsanitize=address;./a.out 

Actual results:
WRITE of size 1 at 0x60040000dff2 thread T0
    #0 0x4007a1 (/tmp/a.out+0x4007a1)

Expected results:
WRITE of size 1 at 0x60040000dff2 thread T0
    #0 0x4007a1 in main (/tmp/a.out+0x4007a1)

Additional info:

The solution is:
export ASAN_OPTIONS=symbolize=1 ASAN_SYMBOLIZER_PATH=/usr/bin/llvm-symbolizer
yum install /usr/bin/llvm-symbolizer

It should be recommended when printing the error and it is not set/available.
Comment 1 Jakub Jelinek 2013-12-07 03:24:12 EST
A patch to use libbacktrace symbolizer as opposed to the llvm mess is now being reviewed for GCC 4.9.
Comment 2 Fedora End Of Life 2015-01-09 15:28:42 EST
This message is a notice that Fedora 19 is now at end of life. Fedora 
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Comment 3 Fedora End Of Life 2015-02-17 14:04:23 EST
Fedora 19 changed to end-of-life (EOL) status on 2015-01-06. Fedora 19 is
no longer maintained, which means that it will not receive any further
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