[LLVMbugs] [Bug 12228] New: wireshark-filters.o from wireshark 1.6.5 miscompiled by clang at -O2

[bugzilla-daemon at llvm.org]

http://llvm.org/bugs/show_bug.cgi?id=12228

             Bug #: 12228
           Summary: wireshark-filters.o  from wireshark 1.6.5 miscompiled
                    by clang at -O2
           Product: clang
           Version: trunk
          Platform: Macintosh
        OS/Version: MacOS X
            Status: NEW
          Severity: normal
          Priority: P
         Component: -New Bugs
        AssignedTo: unassignedclangbugs at nondot.org
        ReportedBy: howarth at nitro.med.uc.edu
                CC: llvmbugs at cs.uiuc.edu
    Classification: Unclassified


Created attachment 8172
  --> http://llvm.org/bugs/attachment.cgi?id=8172
assembly file for filters.c created by llvm svn clang at -O2

The wireshark-filters.o object file in wireshark 1.6.5 is miscompiled by clang
at optimizations higher than -O1 such that the resulting binaries segfault on
startup....

Program received signal EXC_BAD_ACCESS, Could not access memory.
Reason: 13 at address: 0x0000000000000000
0x00007fff923054f0 in strlen ()
(gdb) bt
#0  0x00007fff923054f0 in strlen ()
#1  0x000000010420bef3 in g_strdup ()
warning: Could not open object file:
"/sw/src/fink.build/wireshark-1.6.5-2/wireshark-1.6.5/wireshark-filters.o":
Permission denied
warning: Couldn't open object file
'/sw/src/fink.build/wireshark-1.6.5-2/wireshark-1.6.5/wireshark-filters.o'
#2  0x0000000100014bda in copy_filter_list ()
#3  0x0000000100050e67 in read_configuration_files (gdp_path=0x7fff5fbff700,
dp_path=0x7fff5fbff6f8)
    at main.c:1906
#4  0x000000010004edca in main (argc=1, argv=0x7fff5fbff7a8) at main.c:2418

This bug occurs in both Xcode 4.3.1's clang and llvm.org's clang svn.

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