* Make stack/preemption guard faster on ARM by putting stack...

src/heap.h

Index: src/heap.h
===================================================================
--- src/heap.h	(revision 2758)
+++ src/heap.h	(working copy)
@@ -132,7 +132,8 @@
   V(FixedArray, number_string_cache, NumberStringCache)                        \
   V(FixedArray, single_character_string_cache, SingleCharacterStringCache)     \
   V(FixedArray, natives_source_cache, NativesSourceCache)                      \
-  V(Object, last_script_id, LastScriptId)
+  V(Object, last_script_id, LastScriptId)                                      \
+  V(Smi, stack_limit, StackLimit)
 
 
 #define ROOT_LIST(V)                                  \
@@ -227,6 +228,11 @@
   // Destroys all memory allocated by the heap.
   static void TearDown();
 
+  // Sets the stack limit in the in the roots_ array.  Some architectures

[Mads Ager (chromium), 2009/08/26 10:09:28]

in the in the -> in the

+  // generate code that looks here, because it is faster than loading from the
+  // static jslimit_ variable.
+  static void SetStackLimit(intptr_t limit);
+
   // Returns whether Setup has been called.
   static bool HasBeenSetup();