2010-04-27 Tobias Burnus <burnus@net-b.de>

[pf3gnuchains/gcc-fork.git] / gcc / unwind-dw2-fde-darwin.c

diff --git a/gcc/unwind-dw2-fde-darwin.c b/gcc/unwind-dw2-fde-darwin.c
index 8bd161f..a672e93 100644 (file)
--- a/gcc/unwind-dw2-fde-darwin.c
+++ b/gcc/unwind-dw2-fde-darwin.c
@@ -1,10 +1,11 @@
-/* Copyright (C) 2001, 2002 Free Software Foundation, Inc.
+/* Copyright (C) 2001, 2002, 2003, 2005, 2009, 2010
+   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,
    any later version.
 
    GCC is distributed in the hope that it will be useful,


@@ -12,21 +13,19 @@
    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
    GNU General Public License for more details.
 
    MERCHANTABILITY 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.

 
 

-/* As a special exception, if you link this library with other files,
-   some of which are compiled with GCC, to produce an executable,
-   this library does not by itself cause the resulting executable
-   to be covered by the GNU General Public License.
-   This exception does not however invalidate any other reasons why
-   the executable file might be covered by the GNU General Public License.  */
+   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/>.  */

 
 /* Locate the FDE entry for a given address, using Darwin's keymgr support.  */
 
 #include "tconfig.h"
 
 /* Locate the FDE entry for a given address, using Darwin's keymgr support.  */
 
 #include "tconfig.h"

+#include "tsystem.h"

 #include <string.h>
 #include <stdlib.h>
 #include "dwarf2.h"
 #include <string.h>
 #include <stdlib.h>
 #include "dwarf2.h"


@@ -41,8 +40,8 @@ typedef int __gthread_mutex_t;
 #define __gthread_mutex_lock(x)  (void)(x)
 #define __gthread_mutex_unlock(x) (void)(x)
 
 #define __gthread_mutex_lock(x)  (void)(x)
 #define __gthread_mutex_unlock(x) (void)(x)
 

-static fde * _Unwind_Find_registered_FDE (void *pc, 
-                                         struct dwarf_eh_bases *bases);
+static const fde * _Unwind_Find_registered_FDE (void *pc,
+                                               struct dwarf_eh_bases *bases);

 
 #define _Unwind_Find_FDE _Unwind_Find_registered_FDE
 #include "unwind-dw2-fde.c"
 
 #define _Unwind_Find_FDE _Unwind_Find_registered_FDE
 #include "unwind-dw2-fde.c"


@@ -57,8 +56,11 @@ extern void _keymgr_set_and_unlock_processwide_ptr (int, void *);
 extern void _keymgr_unlock_processwide_ptr (int);
 
 struct mach_header;
 extern void _keymgr_unlock_processwide_ptr (int);
 
 struct mach_header;

+struct mach_header_64;

 extern char *getsectdatafromheader (struct mach_header*, const char*,
 extern char *getsectdatafromheader (struct mach_header*, const char*,

-                       const char *, unsigned long *);
+                                   const char *, unsigned long *);
+extern char *getsectdatafromheader_64 (struct mach_header_64*, const char*,
+                                      const char *, unsigned long *);

 
 /* This is referenced from KEYMGR_GCC3_DW2_OBJ_LIST.  */
 struct km_object_info {
 
 /* This is referenced from KEYMGR_GCC3_DW2_OBJ_LIST.  */
 struct km_object_info {


@@ -86,37 +88,61 @@ enum {
   ALLOCED_IMAGE_MASK = 2,      /* The FDE entries were allocated by
                                   malloc, and must be freed.  This isn't
                                   used by newer libgcc versions.  */
   ALLOCED_IMAGE_MASK = 2,      /* The FDE entries were allocated by
                                   malloc, and must be freed.  This isn't
                                   used by newer libgcc versions.  */

-  IMAGE_IS_TEXT_MASK = 4       /* This image is in the TEXT segment.  */
+  IMAGE_IS_TEXT_MASK = 4,      /* This image is in the TEXT segment.  */
+  DESTRUCTOR_MAY_BE_CALLED_LIVE = 8  /* The destructor may be called on an
+                                       object that's part of the live
+                                       image list.  */

 };
 \f
 };
 \f

-/* Delete any data we allocated on a live_images structure.
-   IMAGE has already been removed from the KEYMGR_GCC3_LIVE_IMAGE_LIST.
-   Called by KeyMgr (which will delete the struct after we return.)  */
+/* Delete any data we allocated on a live_images structure.  Either
+   IMAGE has already been removed from the
+   KEYMGR_GCC3_LIVE_IMAGE_LIST and the struct will be deleted
+   after we return, or that list is locked and we're being called
+   because this object might be about to be unloaded.  Called by
+   KeyMgr.  */

 
 

-static void 
+static void

 live_image_destructor (struct live_images *image)
 {
   if (image->object_info)
     {
 live_image_destructor (struct live_images *image)
 {
   if (image->object_info)
     {

-      /* Free any sorted arrays.  */
-      __deregister_frame_info_bases (image->fde);
+      struct km_object_info *the_obj_info;
+
+      the_obj_info =
+       _keymgr_get_and_lock_processwide_ptr (KEYMGR_GCC3_DW2_OBJ_LIST);
+      if (the_obj_info)
+       {
+         seen_objects = the_obj_info->seen_objects;
+         unseen_objects = the_obj_info->unseen_objects;
+
+         /* Free any sorted arrays.  */
+         __deregister_frame_info_bases (image->fde);
+
+         the_obj_info->seen_objects = seen_objects;
+         the_obj_info->unseen_objects = unseen_objects;
+       }
+      _keymgr_set_and_unlock_processwide_ptr (KEYMGR_GCC3_DW2_OBJ_LIST,
+                                             the_obj_info);

 
       free (image->object_info);
       image->object_info = NULL;
       if (image->examined_p & ALLOCED_IMAGE_MASK)
        free (image->fde);
 
       free (image->object_info);
       image->object_info = NULL;
       if (image->examined_p & ALLOCED_IMAGE_MASK)
        free (image->fde);

+      image->fde = NULL;

     }
     }

+  image->examined_p = 0;
+  image->destructor = NULL;

 }
 
 /* Run through the list of live images.  If we can allocate memory,
    give each unseen image a new `struct object'.  Even if we can't,
    check whether the PC is inside the FDE of each unseen image.
  */
 }
 
 /* Run through the list of live images.  If we can allocate memory,
    give each unseen image a new `struct object'.  Even if we can't,
    check whether the PC is inside the FDE of each unseen image.
  */

- 
-static inline fde *
+
+static inline const fde *

 examine_objects (void *pc, struct dwarf_eh_bases *bases, int dont_alloc)
 {
 examine_objects (void *pc, struct dwarf_eh_bases *bases, int dont_alloc)
 {

-  fde *result = NULL;
+  const fde *result = NULL;

   struct live_images *image;
 
   image = _keymgr_get_and_lock_processwide_ptr (KEYMGR_GCC3_LIVE_IMAGE_LIST);
   struct live_images *image;
 
   image = _keymgr_get_and_lock_processwide_ptr (KEYMGR_GCC3_LIVE_IMAGE_LIST);


@@ -124,31 +150,40 @@ examine_objects (void *pc, struct dwarf_eh_bases *bases, int dont_alloc)
   for (; image != NULL; image = image->next)
     if ((image->examined_p & EXAMINED_IMAGE_MASK) == 0)
       {
   for (; image != NULL; image = image->next)
     if ((image->examined_p & EXAMINED_IMAGE_MASK) == 0)
       {

-       char *fde;
+       char *fde = NULL;

        unsigned long sz;
        unsigned long sz;

-       
+
+       /* For ppc only check whether or not we have __DATA eh frames.  */
+#ifdef __ppc__

        fde = getsectdatafromheader (image->mh, "__DATA", "__eh_frame", &sz);
        fde = getsectdatafromheader (image->mh, "__DATA", "__eh_frame", &sz);

+#endif
+

        if (fde == NULL)
          {
        if (fde == NULL)
          {

+#if __LP64__
+           fde = getsectdatafromheader_64 ((struct mach_header_64 *) image->mh,
+                                           "__TEXT", "__eh_frame", &sz);
+#else

            fde = getsectdatafromheader (image->mh, "__TEXT",
                                         "__eh_frame", &sz);
            fde = getsectdatafromheader (image->mh, "__TEXT",
                                         "__eh_frame", &sz);

+#endif

            if (fde != NULL)
              image->examined_p |= IMAGE_IS_TEXT_MASK;
          }
            if (fde != NULL)
              image->examined_p |= IMAGE_IS_TEXT_MASK;
          }

-       
+

        /* If .eh_frame is empty, don't register at all.  */
        if (fde != NULL && sz > 0)
          {
            char *real_fde = (fde + image->vm_slide);
            struct object *ob = NULL;
            struct object panicob;
        /* If .eh_frame is empty, don't register at all.  */
        if (fde != NULL && sz > 0)
          {
            char *real_fde = (fde + image->vm_slide);
            struct object *ob = NULL;
            struct object panicob;

-           
+

            if (! dont_alloc)
              ob = calloc (1, sizeof (struct object));
            dont_alloc |= ob == NULL;
            if (dont_alloc)
              ob = &panicob;
            if (! dont_alloc)
              ob = calloc (1, sizeof (struct object));
            dont_alloc |= ob == NULL;
            if (dont_alloc)
              ob = &panicob;

-           
+

            ob->pc_begin = (void *)-1;
            ob->tbase = 0;
            ob->dbase = 0;
            ob->pc_begin = (void *)-1;
            ob->tbase = 0;
            ob->dbase = 0;


@@ -156,34 +191,44 @@ examine_objects (void *pc, struct dwarf_eh_bases *bases, int dont_alloc)
            ob->s.i = 0;
            ob->s.b.encoding = DW_EH_PE_omit;
            ob->fde_end = real_fde + sz;
            ob->s.i = 0;
            ob->s.b.encoding = DW_EH_PE_omit;
            ob->fde_end = real_fde + sz;

-           
+
+           image->fde = real_fde;
+
+           result = search_object (ob, pc);
+

            if (! dont_alloc)
              {
            if (! dont_alloc)
              {

-               ob->next = unseen_objects;
-               unseen_objects = ob;
-               
+               struct object **p;
+

                image->destructor = live_image_destructor;
                image->object_info = ob;
                image->destructor = live_image_destructor;
                image->object_info = ob;

-               
-               image->examined_p |= EXAMINED_IMAGE_MASK;
+
+               image->examined_p |= (EXAMINED_IMAGE_MASK
+                                     | DESTRUCTOR_MAY_BE_CALLED_LIVE);
+
+               /* Insert the object into the classified list.  */
+               for (p = &seen_objects; *p ; p = &(*p)->next)
+                 if ((*p)->pc_begin < ob->pc_begin)
+                   break;
+               ob->next = *p;
+               *p = ob;

              }
              }

-           image->fde = real_fde;
-           
-           result = search_object (ob, pc);
+

            if (result)
              {
                int encoding;
            if (result)
              {
                int encoding;

-               
+               _Unwind_Ptr func;
+

                bases->tbase = ob->tbase;
                bases->dbase = ob->dbase;
                bases->tbase = ob->tbase;
                bases->dbase = ob->dbase;

-               
+

                encoding = ob->s.b.encoding;
                if (ob->s.b.mixed_encoding)
                  encoding = get_fde_encoding (result);
                encoding = ob->s.b.encoding;
                if (ob->s.b.mixed_encoding)
                  encoding = get_fde_encoding (result);

-               read_encoded_value_with_base (encoding, 
+               read_encoded_value_with_base (encoding,

                                              base_from_object (encoding, ob),
                                              base_from_object (encoding, ob),

-                                             result->pc_begin, 
-                                             (_Unwind_Ptr *)&bases->func);
+                                             result->pc_begin, &func);
+               bases->func = (void *) func;

                break;
              }
          }
                break;
              }
          }


@@ -196,25 +241,25 @@ examine_objects (void *pc, struct dwarf_eh_bases *bases, int dont_alloc)
   return result;
 }
 
   return result;
 }
 

-fde *
+const fde *

 _Unwind_Find_FDE (void *pc, struct dwarf_eh_bases *bases)
 {
   struct km_object_info *the_obj_info;
 _Unwind_Find_FDE (void *pc, struct dwarf_eh_bases *bases)
 {
   struct km_object_info *the_obj_info;

-  fde *ret = NULL;
+  const fde *ret = NULL;

 
 

-  the_obj_info = 
+  the_obj_info =

     _keymgr_get_and_lock_processwide_ptr (KEYMGR_GCC3_DW2_OBJ_LIST);
   if (! the_obj_info)
     the_obj_info = calloc (1, sizeof (*the_obj_info));
     _keymgr_get_and_lock_processwide_ptr (KEYMGR_GCC3_DW2_OBJ_LIST);
   if (! the_obj_info)
     the_obj_info = calloc (1, sizeof (*the_obj_info));

-  
+

   if (the_obj_info != NULL)
     {
       seen_objects = the_obj_info->seen_objects;
       unseen_objects = the_obj_info->unseen_objects;
   if (the_obj_info != NULL)
     {
       seen_objects = the_obj_info->seen_objects;
       unseen_objects = the_obj_info->unseen_objects;

-  
+

       ret = _Unwind_Find_registered_FDE (pc, bases);
     }
       ret = _Unwind_Find_registered_FDE (pc, bases);
     }

-  
+

   /* OK, didn't find it in the list of FDEs we've seen before,
      so go through and look at the new ones.  */
   if (ret == NULL)
   /* OK, didn't find it in the list of FDEs we've seen before,
      so go through and look at the new ones.  */
   if (ret == NULL)


@@ -224,8 +269,20 @@ _Unwind_Find_FDE (void *pc, struct dwarf_eh_bases *bases)
     {
       the_obj_info->seen_objects = seen_objects;
       the_obj_info->unseen_objects = unseen_objects;
     {
       the_obj_info->seen_objects = seen_objects;
       the_obj_info->unseen_objects = unseen_objects;

-      _keymgr_set_and_unlock_processwide_ptr (KEYMGR_GCC3_DW2_OBJ_LIST,
-                                             the_obj_info);

     }
     }

+  _keymgr_set_and_unlock_processwide_ptr (KEYMGR_GCC3_DW2_OBJ_LIST,
+                                         the_obj_info);

   return ret;
 }
   return ret;
 }

+
+void *
+_darwin10_Unwind_FindEnclosingFunction (void *pc)
+{
+  struct dwarf_eh_bases bases;
+  const struct dwarf_fde *fde = _Unwind_Find_FDE (pc-1, &bases);
+  if (fde)
+    return bases.func;
+  else
+    return NULL;
+}
+