Don't set enable_decimal_float to dpd if DFP is disabled.

[pf3gnuchains/gcc-fork.git] / libobjc / sendmsg.c

diff --git a/libobjc/sendmsg.c b/libobjc/sendmsg.c
index 6ef711b..8b18451 100644 (file)
--- a/libobjc/sendmsg.c
+++ b/libobjc/sendmsg.c
@@ -1,40 +1,47 @@
 /* GNU Objective C Runtime message lookup 
    Copyright (C) 1993, 1995, 1996, 1997, 1998,
 /* GNU Objective C Runtime message lookup 
    Copyright (C) 1993, 1995, 1996, 1997, 1998,

-   2001, 2002 Free Software Foundation, Inc.
+   2001, 2002, 2004, 2009 Free Software Foundation, Inc.

    Contributed by Kresten Krab Thorup
 
    Contributed by Kresten Krab Thorup
 

-This file is part of GNU CC.
+This file is part of GCC.

 
 

-GNU CC is free software; you can redistribute it and/or modify it under the
+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
 terms of the GNU General Public License as published by the Free Software

-Foundation; either version 2, or (at your option) any later version.
+Foundation; either version 3, or (at your option) any later version.

 
 

-GNU CC is distributed in the hope that it will be useful, but WITHOUT ANY
+GCC is distributed in the hope that it will be useful, but WITHOUT ANY

 WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
 FOR A PARTICULAR PURPOSE.  See the GNU General Public License for more
 details.
 
 WARRANTY; without even the implied warranty of 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
-GNU CC; 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 files compiled with
-   GCC to produce an executable, this does not 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/>.  */
+
+
+/* FIXME: This file has no business including tm.h.  */
+/* FIXME: This should be using libffi instead of __builtin_apply
+   and friends.  */

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

-#include "runtime.h"
-#include "sarray.h"
-#include "encoding.h"
+#include "coretypes.h"
+#include "tm.h"
+#include "objc/runtime.h"
+#include "objc/sarray.h"
+#include "objc/encoding.h"

 #include "runtime-info.h"
 
 #include "runtime-info.h"
 

-/* this is how we hack STRUCT_VALUE to be 1 or 0 */
+/* This is how we hack STRUCT_VALUE to be 1 or 0.   */

 #define gen_rtx(args...) 1
 #define gen_rtx_MEM(args...) 1
 #define gen_rtx_REG(args...) 1
 #define gen_rtx(args...) 1
 #define gen_rtx_MEM(args...) 1
 #define gen_rtx_REG(args...) 1

+/* Alread defined in gcc/coretypes.h. So prevent double definition warning.  */
+#undef rtx

 #define rtx int
 
 #if ! defined (STRUCT_VALUE) || STRUCT_VALUE == 0
 #define rtx int
 
 #if ! defined (STRUCT_VALUE) || STRUCT_VALUE == 0


@@ -46,10 +53,15 @@ Boston, MA 02111-1307, USA.  */
 /* The uninstalled dispatch table */
 struct sarray *__objc_uninstalled_dtable = 0;   /* !T:MUTEX */
 
 /* The uninstalled dispatch table */
 struct sarray *__objc_uninstalled_dtable = 0;   /* !T:MUTEX */
 

-/* Hook for method forwarding. If it is set, is invoked to return a
-   function that performs the real forwarding. Otherwise the libgcc
-   based functions (__builtin_apply and friends) are used. */
+/* Two hooks for method forwarding. If either is set, it is invoked
+ * to return a function that performs the real forwarding.  If both
+ * are set, the result of __objc_msg_forward2 will be preferred over
+ * that of __objc_msg_forward.  If both return NULL or are unset,
+ * the libgcc based functions (__builtin_apply and friends) are
+ * used.
+ */

 IMP (*__objc_msg_forward) (SEL) = NULL;
 IMP (*__objc_msg_forward) (SEL) = NULL;

+IMP (*__objc_msg_forward2) (id, SEL) = NULL;

 
 /* Send +initialize to class */
 static void __objc_send_initialize (Class);
 
 /* Send +initialize to class */
 static void __objc_send_initialize (Class);


@@ -63,8 +75,7 @@ static void __objc_init_install_dtable (id, SEL);
    return type for the selector.
    __objc_block_forward for structures.
    __objc_double_forward for floats/doubles.
    return type for the selector.
    __objc_block_forward for structures.
    __objc_double_forward for floats/doubles.

-   __objc_word_forward for pointers or types that fit in registers.
-   */
+   __objc_word_forward for pointers or types that fit in registers. */

 static double __objc_double_forward (id, SEL, ...);
 static id __objc_word_forward (id, SEL, ...);
 typedef struct { id many[8]; } __big;
 static double __objc_double_forward (id, SEL, ...);
 static id __objc_word_forward (id, SEL, ...);
 typedef struct { id many[8]; } __big;


@@ -79,12 +90,19 @@ Method_t search_for_method_in_list (MethodList_t list, SEL op);
 id nil_method (id, SEL);
 
 /* Given a selector, return the proper forwarding implementation. */
 id nil_method (id, SEL);
 
 /* Given a selector, return the proper forwarding implementation. */

-__inline__
+inline

 IMP
 IMP

-__objc_get_forward_imp (SEL sel)
+__objc_get_forward_imp (id rcv, SEL sel)

 {
   /* If a custom forwarding hook was registered, try getting a forwarding
 {
   /* If a custom forwarding hook was registered, try getting a forwarding

-   * function from it.  */
+     function from it. There are two forward routine hooks, one that
+     takes the receiver as an argument and one that does not. */
+  if (__objc_msg_forward2)
+    {
+      IMP result;
+      if ((result = __objc_msg_forward2 (rcv, sel)) != NULL)
+       return result;
+    }

   if (__objc_msg_forward)
     {
       IMP result;
   if (__objc_msg_forward)
     {
       IMP result;


@@ -93,7 +111,7 @@ __objc_get_forward_imp (SEL sel)
     }
 
   /* In all other cases, use the default forwarding functions built using
     }
 
   /* In all other cases, use the default forwarding functions built using

-   * __builtin_apply and friends.  */
+     __builtin_apply and friends.  */

     {
       const char *t = sel->sel_types;
 
     {
       const char *t = sel->sel_types;
 


@@ -111,10 +129,18 @@ __objc_get_forward_imp (SEL sel)
 }
 
 /* Given a class and selector, return the selector's implementation.  */
 }
 
 /* Given a class and selector, return the selector's implementation.  */

-__inline__
+inline

 IMP
 get_imp (Class class, SEL sel)
 {
 IMP
 get_imp (Class class, SEL sel)
 {

+  /* In a vanilla implementation we would first check if the dispatch
+     table is installed.  Here instead, to get more speed in the
+     standard case (that the dispatch table is installed) we first try
+     to get the imp using brute force.  Only if that fails, we do what
+     we should have been doing from the very beginning, that is, check
+     if the dispatch table needs to be installed, install it if it's
+     not installed, and retrieve the imp from the table if it's
+     installed.  */

   void *res = sarray_get_safe (class->dtable, (size_t) sel->sel_id);
   if (res == 0)
     {
   void *res = sarray_get_safe (class->dtable, (size_t) sel->sel_id);
   if (res == 0)
     {


@@ -123,7 +149,16 @@ get_imp (Class class, SEL sel)
        {
          /* The dispatch table needs to be installed. */
          objc_mutex_lock (__objc_runtime_mutex);
        {
          /* The dispatch table needs to be installed. */
          objc_mutex_lock (__objc_runtime_mutex);

-         __objc_install_dispatch_table_for_class (class);
+
+          /* Double-checked locking pattern: Check
+             __objc_uninstalled_dtable again in case another thread
+             installed the dtable while we were waiting for the lock
+             to be released.  */
+         if (class->dtable == __objc_uninstalled_dtable)
+           {
+             __objc_install_dispatch_table_for_class (class);
+           }
+

          objc_mutex_unlock (__objc_runtime_mutex);
          /* Call ourselves with the installed dispatch table
             and get the real method */
          objc_mutex_unlock (__objc_runtime_mutex);
          /* Call ourselves with the installed dispatch table
             and get the real method */


@@ -131,10 +166,22 @@ get_imp (Class class, SEL sel)
        }
       else
        {
        }
       else
        {

-         /* The dispatch table has been installed so the
-            method just doesn't exist for the class.
-            Return the forwarding implementation. */
-         res = __objc_get_forward_imp (sel);
+         /* The dispatch table has been installed.  */
+
+         /* Get the method from the dispatch table (we try to get it
+           again in case another thread has installed the dtable just
+           after we invoked sarray_get_safe, but before we checked
+           class->dtable == __objc_uninstalled_dtable).
+         */
+         res = sarray_get_safe (class->dtable, (size_t) sel->sel_id);
+         if (res == 0)
+           {
+             /* The dispatch table has been installed, and the method
+                is not in the dispatch table.  So the method just
+                doesn't exist for the class.  Return the forwarding
+                implementation. */
+             res = __objc_get_forward_imp ((id)class, sel);
+           }

        }
     }
   return res;
        }
     }
   return res;


@@ -143,7 +190,7 @@ get_imp (Class class, SEL sel)
 /* Query if an object can respond to a selector, returns YES if the
 object implements the selector otherwise NO.  Does not check if the
 method can be forwarded. */
 /* Query if an object can respond to a selector, returns YES if the
 object implements the selector otherwise NO.  Does not check if the
 method can be forwarded. */

-__inline__
+inline

 BOOL
 __objc_responds_to (id object, SEL sel)
 {
 BOOL
 __objc_responds_to (id object, SEL sel)
 {


@@ -153,7 +200,10 @@ __objc_responds_to (id object, SEL sel)
   if (object->class_pointer->dtable == __objc_uninstalled_dtable)
     {
       objc_mutex_lock (__objc_runtime_mutex);
   if (object->class_pointer->dtable == __objc_uninstalled_dtable)
     {
       objc_mutex_lock (__objc_runtime_mutex);

-      __objc_install_dispatch_table_for_class (object->class_pointer);
+      if (object->class_pointer->dtable == __objc_uninstalled_dtable)
+       {
+         __objc_install_dispatch_table_for_class (object->class_pointer);
+       }

       objc_mutex_unlock (__objc_runtime_mutex);
     }
 
       objc_mutex_unlock (__objc_runtime_mutex);
     }
 


@@ -165,7 +215,7 @@ __objc_responds_to (id object, SEL sel)
 /* This is the lookup function.  All entries in the table are either a 
    valid method *or* zero.  If zero then either the dispatch table
    needs to be installed or it doesn't exist and forwarding is attempted. */
 /* This is the lookup function.  All entries in the table are either a 
    valid method *or* zero.  If zero then either the dispatch table
    needs to be installed or it doesn't exist and forwarding is attempted. */

-__inline__
+inline

 IMP
 objc_msg_lookup (id receiver, SEL op)
 {
 IMP
 objc_msg_lookup (id receiver, SEL op)
 {


@@ -188,10 +238,19 @@ objc_msg_lookup (id receiver, SEL op)
            }
          else
            {
            }
          else
            {

-             /* The dispatch table has been installed so the
-                method just doesn't exist for the class.
-                Attempt to forward the method. */
-             result = __objc_get_forward_imp (op);
+             /* The dispatch table has been installed.  Check again
+                if the method exists (just in case the dispatch table
+                has been installed by another thread after we did the
+                previous check that the method exists).
+             */
+             result = sarray_get_safe (receiver->class_pointer->dtable,
+                                       (sidx)op->sel_id);
+             if (result == 0)
+               {
+                 /* If the method still just doesn't exist for the
+                    class, attempt to forward the method. */
+                 result = __objc_get_forward_imp (receiver, op);
+               }

            }
        }
       return result;
            }
        }
       return result;


@@ -235,13 +294,16 @@ __objc_init_dispatch_tables ()
 static void
 __objc_init_install_dtable (id receiver, SEL op __attribute__ ((__unused__)))
 {
 static void
 __objc_init_install_dtable (id receiver, SEL op __attribute__ ((__unused__)))
 {

+  objc_mutex_lock (__objc_runtime_mutex);
+  

   /* This may happen, if the programmer has taken the address of a 
      method before the dtable was initialized... too bad for him! */
   if (receiver->class_pointer->dtable != __objc_uninstalled_dtable)
   /* This may happen, if the programmer has taken the address of a 
      method before the dtable was initialized... too bad for him! */
   if (receiver->class_pointer->dtable != __objc_uninstalled_dtable)

-    return;
-
-  objc_mutex_lock (__objc_runtime_mutex);
-
+    {
+      objc_mutex_unlock (__objc_runtime_mutex);
+      return;
+    }
+  

   if (CLS_ISCLASS (receiver->class_pointer))
     {
       /* receiver is an ordinary object */
   if (CLS_ISCLASS (receiver->class_pointer))
     {
       /* receiver is an ordinary object */


@@ -415,28 +477,14 @@ __objc_update_dispatch_table_for_class (Class class)
 
    This one is only called for categories. Class objects have their
    methods installed right away, and their selectors are made into
 
    This one is only called for categories. Class objects have their
    methods installed right away, and their selectors are made into

-   SEL's by the function __objc_register_selectors_from_class. */ 
+   SEL's by the function __objc_register_selectors_from_class. */

 void
 class_add_method_list (Class class, MethodList_t list)
 {
 void
 class_add_method_list (Class class, MethodList_t list)
 {

-  int i;
-

   /* Passing of a linked list is not allowed.  Do multiple calls.  */
   assert (! list->method_next);
 
   /* Passing of a linked list is not allowed.  Do multiple calls.  */
   assert (! list->method_next);
 

-  /* Check for duplicates.  */
-  for (i = 0; i < list->method_count; ++i)
-    {
-      Method_t method = &list->method_list[i];
-
-      if (method->method_name)  /* Sometimes these are NULL */
-       {
-         /* This is where selector names are transmogrified to SEL's */
-         method->method_name = 
-           sel_register_typed_name ((const char *) method->method_name,
-                                    method->method_types);
-       }
-    }
+  __objc_register_selectors_from_list(list);

 
   /* Add the methods to the class's method list.  */
   list->method_next = class->methods;
 
   /* Add the methods to the class's method list.  */
   list->method_next = class->methods;


@@ -638,14 +686,14 @@ __objc_print_dtable_stats ()
 #endif
 
   printf ("arrays: %d = %ld bytes\n", narrays, 
 #endif
 
   printf ("arrays: %d = %ld bytes\n", narrays, 

-         (long) narrays * sizeof (struct sarray));
+         (long) ((size_t) narrays * sizeof (struct sarray)));

   total += narrays * sizeof (struct sarray);
   printf ("buckets: %d = %ld bytes\n", nbuckets, 
   total += narrays * sizeof (struct sarray);
   printf ("buckets: %d = %ld bytes\n", nbuckets, 

-         (long) nbuckets * sizeof (struct sbucket));
+         (long) ((size_t) nbuckets * sizeof (struct sbucket)));

   total += nbuckets * sizeof (struct sbucket);
 
   printf ("idxtables: %d = %ld bytes\n",
   total += nbuckets * sizeof (struct sbucket);
 
   printf ("idxtables: %d = %ld bytes\n",

-         idxsize, (long) idxsize * sizeof (void *));
+         idxsize, (long) ((size_t) idxsize * sizeof (void *)));

   total += idxsize * sizeof (void *);
   printf ("-----------------------------------\n");
   printf ("total: %d bytes\n", total);
   total += idxsize * sizeof (void *);
   printf ("-----------------------------------\n");
   printf ("total: %d bytes\n", total);


@@ -657,7 +705,7 @@ __objc_print_dtable_stats ()
 /* Returns the uninstalled dispatch table indicator.
  If a class' dispatch table points to __objc_uninstalled_dtable
  then that means it needs its dispatch table to be installed. */
 /* Returns the uninstalled dispatch table indicator.
  If a class' dispatch table points to __objc_uninstalled_dtable
  then that means it needs its dispatch table to be installed. */

-__inline__
+inline

 struct sarray *
 objc_get_uninstalled_dtable ()
 {
 struct sarray *
 objc_get_uninstalled_dtable ()
 {