[Bug other/26208] Serious problem with unwinding through signal frames

["jakub at gcc dot gnu dot org" <gcc-bugzilla at gcc dot gnu dot org>]

------- Comment #29 from jakub at gcc dot gnu dot org  2006-02-28 22:20 -------
Subject: Bug 26208

Author: jakub
Date: Tue Feb 28 22:20:34 2006
New Revision: 111581

URL: http://gcc.gnu.org/viewcvs?root=gcc&view=rev&rev=111581
Log:
        PR other/26208
        * unwind-dw2.c (struct _Unwind_Context): Add signal_frame field.
        (extract_cie_info): Handle S flag in augmentation string.
        (execute_cfa_program): If context->signal_frame, execute also
        fs->pc == context->ra instructions.
        (uw_frame_state_for): If context->signal_frame, don't subtract one
        from context->ra to find FDE.
        (uw_update_context_1): Set context->signal_frame to
        fs->signal_frame.
        (_Unwind_GetIPInfo): New function.
        * unwind-dw2.h (_Unwind_FrameState): Add signal_frame field.
        * unwind-c.c (PERSONALITY_FUNCTION): Use _Unwind_GetIPInfo instead
        of _Unwind_GetIP.
        * unwind-sjlj.c (_Unwind_GetIPInfo): New function.
        * unwind-generic.h (_Unwind_GetIPInfo): New prototype.
        * unwind-compat.c (_Unwind_GetIPInfo): New function.
        * libgcc-std.ver (_Unwind_GetIPInfo): Export @@GCC_4.2.0.
        * config/ia64/unwind-ia64.c (_Unwind_GetIPInfo): New function.
        * config/arm/unwind-arm.h (_Unwind_GetIPInfo): Define.
        * config/i386/linux-unwind.h (x86_fallback_frame_state,
        x86_64_fallback_frame_state): Set fs->signal_frame.
        * config/rs6000/linux-unwind.h (ppc_fallback_frame_state): Likewise.
        (MD_FROB_UPDATE_CONTEXT): Define unconditionally.
        (frob_update_context): Likewise.  Workaround missing S flag in
        Linux 2.6.12 - 2.6.16 kernel vDSOs.
        * config/s390/linux-unwind.h (s390_fallback_frame_state): Likewise.
        Remove the psw_addr + 1 hack.
libjava/
        * exception.cc (PERSONALITY_FUNCTION): Use _Unwind_GetIPInfo instead
        of _Unwind_GetIP.
        * include/i386-signal.h (MAKE_THROW_FRAME): Change into empty macro.
        (HANDLE_DIVIDE_OVERFLOW): Don't adjust _res->eip if falling through
        to throw.
        * include/x86_64-signal.h (MAKE_THROW_FRAME): Change into empty
        macro.
        * include/powerpc-signal.h (MAKE_THROW_FRAME): Change into empty
        macro.
libstdc++-v3/
        * libsupc++/eh_personality.cc (PERSONALITY_FUNCTION): Use
        _Unwind_GetIPInfo instead of _Unwind_GetIP.

Modified:
    branches/redhat/gcc-4_1-branch/gcc/ChangeLog
    branches/redhat/gcc-4_1-branch/gcc/config/arm/unwind-arm.h
    branches/redhat/gcc-4_1-branch/gcc/config/i386/linux-unwind.h
    branches/redhat/gcc-4_1-branch/gcc/config/ia64/unwind-ia64.c
    branches/redhat/gcc-4_1-branch/gcc/config/rs6000/linux-unwind.h
    branches/redhat/gcc-4_1-branch/gcc/config/s390/linux-unwind.h
    branches/redhat/gcc-4_1-branch/gcc/libgcc-std.ver
    branches/redhat/gcc-4_1-branch/gcc/unwind-c.c
    branches/redhat/gcc-4_1-branch/gcc/unwind-compat.c
    branches/redhat/gcc-4_1-branch/gcc/unwind-dw2.c
    branches/redhat/gcc-4_1-branch/gcc/unwind-dw2.h
    branches/redhat/gcc-4_1-branch/gcc/unwind-generic.h
    branches/redhat/gcc-4_1-branch/gcc/unwind-sjlj.c
    branches/redhat/gcc-4_1-branch/libjava/ChangeLog
    branches/redhat/gcc-4_1-branch/libjava/exception.cc
    branches/redhat/gcc-4_1-branch/libjava/include/i386-signal.h
    branches/redhat/gcc-4_1-branch/libjava/include/powerpc-signal.h
    branches/redhat/gcc-4_1-branch/libjava/include/x86_64-signal.h
    branches/redhat/gcc-4_1-branch/libstdc++-v3/ChangeLog
    branches/redhat/gcc-4_1-branch/libstdc++-v3/libsupc++/eh_personality.cc


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http://gcc.gnu.org/bugzilla/show_bug.cgi?id=26208