[LLVMbugs] [Bug 10834] New: shared library linkage regressions under dragonegg svn

[bugzilla-daemon at llvm.org]

http://llvm.org/bugs/show_bug.cgi?id=10834

           Summary: shared library linkage regressions under dragonegg svn
           Product: dragonegg
           Version: trunk
          Platform: Macintosh
        OS/Version: MacOS X
            Status: NEW
          Severity: normal
          Priority: P
         Component: New Bugs
        AssignedTo: baldrick at free.fr
        ReportedBy: howarth at nitro.med.uc.edu
                CC: llvmbugs at cs.uiuc.edu


Created an attachment (id=7194)
 --> (http://llvm.org/bugs/attachment.cgi?id=7194)
linkage failure example

The dragonegg plugin on x86_64-apple-darwin11 now triggers linkage error
failures (segfaults in ld) that weren't present before a yesterday. These
appear as...

[MacPro:~/linkage_failure] howarth% /usr/bin/ld -dynamic -dylib -arch x86_64
-flat_namespace -macosx_version_min 10.7.2 -single_module -undefined suppress
-weak_reference_mismatches non-weak -undefined suppress -o libvmd.dylib
-ldylib1.10.5.o dpApi.o vmd.o vmdInter.o tclStream.o dpStream.o ssStream.o
publicVMDInter.o thread.o -lcrypto -lstdc++ -no_compact_unwind -lSystem -L.
-lgcc_ext.10.5 -lgcc -lSystem crtfastmath.o
Segmentation fault

This back traces in gdb as...

[MacPro:~/linkage_failure] howarth% gdb /usr/bin/ld
GNU gdb 6.3.50-20050815 (Apple version gdb-1705) (Fri Jul  1 10:50:06 UTC 2011)
Copyright 2004 Free Software Foundation, Inc.
GDB is free software, covered by the GNU General Public License, and you are
welcome to change it and/or distribute copies of it under certain conditions.
Type "show copying" to see the conditions.
There is absolutely no warranty for GDB.  Type "show warranty" for details.
This GDB was configured as "x86_64-apple-darwin"...Reading symbols for shared
libraries ... done

(gdb) r -dynamic -dylib -arch x86_64 -flat_namespace -macosx_version_min 10.7.2
-single_module -undefined suppress -weak_reference_mismatches non-weak
-undefined suppress -o libvmd.dylib -ldylib1.10.5.o dpApi.o vmd.o vmdInter.o
tclStream.o dpStream.o ssStream.o publicVMDInter.o thread.o -lcrypto -lstdc++
-no_compact_unwind -lSystem -L. -lgcc_ext.10.5 -lgcc -lSystem crtfastmath.o
Starting program: /usr/bin/ld -dynamic -dylib -arch x86_64 -flat_namespace
-macosx_version_min 10.7.2 -single_module -undefined suppress
-weak_reference_mismatches non-weak -undefined suppress -o libvmd.dylib
-ldylib1.10.5.o dpApi.o vmd.o vmdInter.o tclStream.o dpStream.o ssStream.o
publicVMDInter.o thread.o -lcrypto -lstdc++ -no_compact_unwind -lSystem -L.
-lgcc_ext.10.5 -lgcc -lSystem crtfastmath.o
Reading symbols for shared libraries ++......................... done

Program received signal EXC_BAD_ACCESS, Could not access memory.
Reason: KERN_INVALID_ADDRESS at address: 0x0000000000000028
0x00000001000159b9 in mach_o::relocatable::Section<x86_64>::addRelocFixup ()
(gdb) bt
#0  0x00000001000159b9 in mach_o::relocatable::Section<x86_64>::addRelocFixup
()
#1  0x0000000100047a4c in mach_o::relocatable::Section<x86_64>::makeFixups ()
#2  0x00000001000437a3 in mach_o::relocatable::Parser<x86_64>::parse ()
#3  0x000000010001ec17 in mach_o::relocatable::Parser<x86_64>::parse ()
#4  0x000000010001809f in mach_o::relocatable::parse ()
#5  0x0000000100070ffc in ld::tool::InputFiles::makeFile ()
#6  0x00000001000726f9 in ld::tool::InputFiles::InputFiles ()
#7  0x0000000100012947 in main ()
(gdb)

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