[LLVMbugs] [Bug 2998] New: llvm-g++ EH code doesn't work with GCC 4.3 libgcc_s.so.1

[bugzilla-daemon at cs.uiuc.edu]

http://llvm.org/bugs/show_bug.cgi?id=2998

           Summary: llvm-g++ EH code doesn't work with GCC 4.3 libgcc_s.so.1
           Product: new-bugs
           Version: unspecified
          Platform: PC
        OS/Version: Linux
            Status: NEW
          Severity: normal
          Priority: P2
         Component: new bugs
        AssignedTo: unassignedbugs at nondot.org
        ReportedBy: gohman at apple.com
                CC: llvmbugs at cs.uiuc.edu


Compiling this test from the test-suite:
SingleSource/Regression/C++/EH/ctor_dtor_count.cpp

with llvm-g++ on an Ubuntu "Intrepid" box, where /lib/libgcc_s.so.1 is
built from gcc-4.3 sources, results in an executable that hangs when
executed.

I dug up a libgcc_s.so.1 from an older package compiled from gcc-4.2 sources,
and ran the same ctor_dtor_count executable without recompiling, forcing the
older library to be used using LD_PRELOAD, and it executed successfully.

Compiling ctor_dtor_count with regular g++-4.2 and running the executable with
the gcc-4.3 libgcc_s.so.1 does work.

I'm seeing this in both 32-bit and 64-bit executables.

Valgrind on the test executable found nothing interesting.


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