Fix issue 493: Infinite loop when debug break is set when entering function.apply

src/heap.h

 // Copyright 2006-2008 the V8 project authors. All rights reserved.
 // Redistribution and use in source and binary forms, with or without
 // modification, are permitted provided that the following conditions are
 // met:
 //
 //     * Redistributions of source code must retain the above copyright
 //       notice, this list of conditions and the following disclaimer.
 //     * Redistributions in binary form must reproduce the above
 //       copyright notice, this list of conditions and the following
 //       disclaimer in the documentation and/or other materials provided
@@ skipping 130 matching lines @@
   V(NumberDictionary, code_stubs, CodeStubs)                                   \
   V(NumberDictionary, non_monomorphic_cache, NonMonomorphicCache)              \
   V(Code, js_entry_code, JsEntryCode)                                          \
   V(Code, js_construct_entry_code, JsConstructEntryCode)                       \
   V(Code, c_entry_code, CEntryCode)                                            \
   V(Code, c_entry_debug_break_code, CEntryDebugBreakCode)                      \
   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(Smi, real_stack_limit, RealStackLimit)                                     \
 
 #if V8_TARGET_ARCH_ARM && V8_NATIVE_REGEXP
 #define STRONG_ROOT_LIST(V)                                                    \
   UNCONDITIONAL_STRONG_ROOT_LIST(V)                                            \
   V(Code, re_c_entry_code, RegExpCEntryCode)
 #else
 #define STRONG_ROOT_LIST(V) UNCONDITIONAL_STRONG_ROOT_LIST(V)
 #endif
 
 #define ROOT_LIST(V)                                  \
@@ skipping 82 matching lines @@
   static bool ConfigureHeapDefault();
 
   // Initializes the global object heap. If create_heap_objects is true,
   // also creates the basic non-mutable objects.
   // Returns whether it succeeded.
   static bool Setup(bool create_heap_objects);
 
   // Destroys all memory allocated by the heap.
   static void TearDown();
 
-  // Sets the stack limit in the roots_ array.  Some architectures generate code
-  // that looks here, because it is faster than loading from the static jslimit_
-  // variable.
-  static void SetStackLimit(intptr_t limit);
+  // Set the stack limit in the roots_ array.  Some architectures generate
+  // code that looks here, because it is faster than loading from the static
+  // jslimit_/real_jslimit_ variable in the StackGuard.
+  static void SetStackLimits();
 
   // Returns whether Setup has been called.
   static bool HasBeenSetup();
 
   // Returns the maximum amount of memory reserved for the heap.  For
   // the young generation, we reserve 4 times the amount needed for a
   // semi space.  The young generation consists of two semi spaces and
   // we reserve twice the amount needed for those in order to ensure
   // that new space can be aligned to its size.
   static int MaxReserved() {
@@ skipping 1371 matching lines @@
   }
   static TranscendentalCache* caches_[kNumberOfCaches];
   Element elements_[kCacheSize];
   Type type_;
 };
 
 
 } }  // namespace v8::internal
 
 #endif  // V8_HEAP_H_