re PR other/26208 (Serious problem with unwinding through signal frames)

	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.

From-SVN: r111488

1 files changed, 7 insertions, 4 deletions

diff --git a/libjava/exception.cc b/libjava/exception.cc
index 367df36..65bc4ed 100644
--- a/libjava/exception.cc
+++ b/libjava/exception.cc
@@ -1,6 +1,6 @@
 // Functions for Exception Support for Java.
 
-/* Copyright (C) 1998, 1999, 2001, 2002  Free Software Foundation
+/* Copyright (C) 1998, 1999, 2001, 2002, 2006  Free Software Foundation
 
    This file is part of libgcj.
 
@@ -197,6 +197,7 @@ PERSONALITY_FUNCTION (int version,
   int handler_switch_value;
   bool saw_cleanup;
   bool saw_handler;
+  int ip_before_insn = 0;
 
 
   // Interface version check.
@@ -212,10 +213,10 @@ PERSONALITY_FUNCTION (int version,
       goto install_context;
     }
 
-  // FIXME: In Phase 1, record _Unwind_GetIP in xh->obj as a part of
+  // FIXME: In Phase 1, record _Unwind_GetIPInfo in xh->obj as a part of
   // the stack trace for this exception.  This will only collect Java
   // frames, but perhaps that is acceptable.
-  // FIXME2: _Unwind_GetIP is nonsensical for SJLJ, being a call-site
+  // FIXME2: _Unwind_GetIPInfo is nonsensical for SJLJ, being a call-site
   // index instead of a PC value.  We could perhaps arrange for
   // _Unwind_GetRegionStart to return context->fc->jbuf[1], which
   // is the address of the handler label for __builtin_longjmp, but
@@ -230,7 +231,9 @@ PERSONALITY_FUNCTION (int version,
 
   // Parse the LSDA header.
   p = parse_lsda_header (context, language_specific_data, &info);
-  ip = _Unwind_GetIP (context) - 1;
+  ip = _Unwind_GetIPInfo (context, &ip_before_insn);
+  if (! ip_before_insn)
+    --ip;
   landing_pad = 0;
   action_record = 0;
   handler_switch_value = 0;