Imported gcc-4.4.3

[msp430-gcc.git] / gcc / unwind-sjlj.c

diff --git a/gcc/unwind-sjlj.c b/gcc/unwind-sjlj.c
index 2161b71b7fc658aa1e9445200faa8178756dc2e2..c71e79858eec3ea6e512377f1d58faebd4bff12c 100644 (file)
--- a/gcc/unwind-sjlj.c
+++ b/gcc/unwind-sjlj.c
@@ -1,12 +1,12 @@
-/* DWARF2 exception handling and frame unwind runtime interface routines.
-   Copyright (C) 1997, 1998, 1999, 2000, 2001, 2002
-   Free Software Foundation, Inc.
+/* SJLJ exception handling and frame unwind runtime interface routines.
+   Copyright (C) 1997, 1998, 1999, 2000, 2001, 2002, 2003, 2004, 2006,
+   2009  Free Software Foundation, Inc.

 
    This file is part of GCC.
 
    GCC is free software; you can redistribute it and/or modify it
    under the terms of the GNU General Public License as published by
 
    This file is part of GCC.
 
    GCC is free software; you can redistribute it and/or modify it
    under the terms of the GNU General Public License as published by

-   the Free Software Foundation; either version 2, or (at your option)
+   the Free Software Foundation; either version 3, or (at your option)

    any later version.
 
    GCC is distributed in the hope that it will be useful, but WITHOUT
    any later version.
 
    GCC is distributed in the hope that it will be useful, but WITHOUT


@@ -14,13 +14,19 @@
    or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public
    License for more details.
 
    or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public
    License for more details.
 

-   You should have received a copy of the GNU General Public License
-   along with GCC; see the file COPYING.  If not, write to the Free
-   Software Foundation, 59 Temple Place - Suite 330, Boston, MA
-   02111-1307, USA.  */
+   Under Section 7 of GPL version 3, you are granted additional
+   permissions described in the GCC Runtime Library Exception, version
+   3.1, as published by the Free Software Foundation.
+
+   You should have received a copy of the GNU General Public License and
+   a copy of the GCC Runtime Library Exception along with this program;
+   see the files COPYING3 and COPYING.RUNTIME respectively.  If not, see
+   <http://www.gnu.org/licenses/>.  */

 
 #include "tconfig.h"
 #include "tsystem.h"
 
 #include "tconfig.h"
 #include "tsystem.h"

+#include "coretypes.h"
+#include "tm.h"

 #include "unwind.h"
 #include "gthr.h"
 
 #include "unwind.h"
 #include "gthr.h"
 


@@ -34,10 +40,14 @@ typedef void *jmp_buf[JMP_BUF_SIZE];
 extern void longjmp(jmp_buf, int) __attribute__((noreturn));
 #endif
 #else
 extern void longjmp(jmp_buf, int) __attribute__((noreturn));
 #endif
 #else

-#define setjmp __builtin_setjmp

 #define longjmp __builtin_longjmp
 #endif
 
 #define longjmp __builtin_longjmp
 #endif
 

+/* The setjmp side is dealt with in the except.c file.  */
+#undef setjmp
+#define setjmp setjmp_should_not_be_used_in_this_file
+
+

 /* This structure is allocated on the stack of the target function.
    This must match the definition created in except.c:init_eh.  */
 struct SjLj_Function_Context
 /* This structure is allocated on the stack of the target function.
    This must match the definition created in except.c:init_eh.  */
 struct SjLj_Function_Context


@@ -63,7 +73,7 @@ struct SjLj_Function_Context
 #ifdef DONT_USE_BUILTIN_SETJMP
   /* We don't know what sort of alignment requirements the system
      jmp_buf has.  We over estimated in except.c, and now we have
 #ifdef DONT_USE_BUILTIN_SETJMP
   /* We don't know what sort of alignment requirements the system
      jmp_buf has.  We over estimated in except.c, and now we have

-     to match that here just in case the system *didn't* have more 
+     to match that here just in case the system *didn't* have more

      restrictive requirements.  */
   jmp_buf jbuf __attribute__((aligned));
 #else
      restrictive requirements.  */
   jmp_buf jbuf __attribute__((aligned));
 #else


@@ -76,7 +86,7 @@ struct _Unwind_Context
   struct SjLj_Function_Context *fc;
 };
 
   struct SjLj_Function_Context *fc;
 };
 

-typedef struct 
+typedef struct

 {
   _Unwind_Personality_Fn personality;
 } _Unwind_FrameState;
 {
   _Unwind_Personality_Fn personality;
 } _Unwind_FrameState;


@@ -91,16 +101,10 @@ static struct SjLj_Function_Context *fc_static;
 static __gthread_key_t fc_key;
 static int use_fc_key = -1;
 
 static __gthread_key_t fc_key;
 static int use_fc_key = -1;
 

-static void
-fc_key_dtor (void *ptr)
-{
-  __gthread_key_dtor (fc_key, ptr);
-}
-

 static void
 fc_key_init (void)
 {
 static void
 fc_key_init (void)
 {

-  use_fc_key = __gthread_key_create (&fc_key, fc_key_dtor) == 0;
+  use_fc_key = __gthread_key_create (&fc_key, 0) == 0;

 }
 
 static void
 }
 
 static void


@@ -174,6 +178,27 @@ _Unwind_GetGR (struct _Unwind_Context *context, int index)
   return context->fc->data[index];
 }
 
   return context->fc->data[index];
 }
 

+/* Get the value of the CFA as saved in CONTEXT.  */
+
+_Unwind_Word
+_Unwind_GetCFA (struct _Unwind_Context *context __attribute__((unused)))
+{
+  /* ??? Ideally __builtin_setjmp places the CFA in the jmpbuf.  */
+
+#ifndef DONT_USE_BUILTIN_SETJMP
+  /* This is a crude imitation of the CFA: the saved stack pointer.
+     This is roughly the CFA of the frame before CONTEXT.  When using the
+     DWARF-2 unwinder _Unwind_GetCFA returns the CFA of the frame described
+     by CONTEXT instead; but for DWARF-2 the cleanups associated with
+     CONTEXT have already been run, and for SJLJ they have not yet been.  */
+  if (context->fc != NULL)
+    return (_Unwind_Word) context->fc->jbuf[2];
+#endif
+
+  /* Otherwise we're out of luck for now.  */
+  return (_Unwind_Word) 0;
+}
+

 void
 _Unwind_SetGR (struct _Unwind_Context *context, int index, _Unwind_Word val)
 {
 void
 _Unwind_SetGR (struct _Unwind_Context *context, int index, _Unwind_Word val)
 {


@@ -188,6 +213,16 @@ _Unwind_GetIP (struct _Unwind_Context *context)
   return context->fc->call_site + 1;
 }
 
   return context->fc->call_site + 1;
 }
 

+_Unwind_Ptr
+_Unwind_GetIPInfo (struct _Unwind_Context *context, int *ip_before_insn)
+{
+  *ip_before_insn = 0;
+  if (context->fc != NULL)
+    return context->fc->call_site + 1;
+  else
+    return 0;
+}
+

 /* Set the return landing pad index in CONTEXT.  */
 
 void
 /* Set the return landing pad index in CONTEXT.  */
 
 void


@@ -208,6 +243,12 @@ _Unwind_GetRegionStart (struct _Unwind_Context *context __attribute__((unused))
   return 0;
 }
 
   return 0;
 }
 

+void *
+_Unwind_FindEnclosingFunction (void *pc __attribute__((unused)))
+{
+  return NULL;
+}
+

 #ifndef __ia64__
 _Unwind_Ptr
 _Unwind_GetDataRelBase (struct _Unwind_Context *context __attribute__((unused)) )
 #ifndef __ia64__
 _Unwind_Ptr
 _Unwind_GetDataRelBase (struct _Unwind_Context *context __attribute__((unused)) )


@@ -244,22 +285,26 @@ uw_update_context (struct _Unwind_Context *context,
   context->fc = context->fc->prev;
 }
 
   context->fc = context->fc->prev;
 }
 

-static inline void 
+static void
+uw_advance_context (struct _Unwind_Context *context, _Unwind_FrameState *fs)
+{
+  _Unwind_SjLj_Unregister (context->fc);
+  uw_update_context (context, fs);
+}
+
+static inline void

 uw_init_context (struct _Unwind_Context *context)
 {
   context->fc = _Unwind_SjLj_GetContext ();
 }
 
 uw_init_context (struct _Unwind_Context *context)
 {
   context->fc = _Unwind_SjLj_GetContext ();
 }
 

-/* ??? There appear to be bugs in integrate.c wrt __builtin_longjmp and
-   virtual-stack-vars.  An inline version of this segfaults on Sparc.  */
-#define uw_install_context(CURRENT, TARGET)            \
-  do                                                   \
-    {                                                  \
-      _Unwind_SjLj_SetContext ((TARGET)->fc);          \
-      longjmp ((TARGET)->fc->jbuf, 1);                 \
-    }                                                  \
-  while (0)
-
+static void __attribute__((noreturn))
+uw_install_context (struct _Unwind_Context *current __attribute__((unused)),
+                    struct _Unwind_Context *target)
+{
+  _Unwind_SjLj_SetContext (target->fc);
+  longjmp (target->fc->jbuf, 1);
+}

 
 static inline _Unwind_Ptr
 uw_identify_context (struct _Unwind_Context *context)
 
 static inline _Unwind_Ptr
 uw_identify_context (struct _Unwind_Context *context)


@@ -274,6 +319,7 @@ uw_identify_context (struct _Unwind_Context *context)
 #define _Unwind_RaiseException         _Unwind_SjLj_RaiseException
 #define _Unwind_ForcedUnwind           _Unwind_SjLj_ForcedUnwind
 #define _Unwind_Resume                 _Unwind_SjLj_Resume
 #define _Unwind_RaiseException         _Unwind_SjLj_RaiseException
 #define _Unwind_ForcedUnwind           _Unwind_SjLj_ForcedUnwind
 #define _Unwind_Resume                 _Unwind_SjLj_Resume

+#define _Unwind_Resume_or_Rethrow      _Unwind_SjLj_Resume_or_Rethrow

 
 #include "unwind.inc"
 
 
 #include "unwind.inc"