Add support for enabling DCHECKs in release mode

src/frames.cc

 // Copyright 2012 the V8 project authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "src/frames.h"
 
 #include <sstream>
 
 #include "src/v8.h"
 
@@ skipping 368 matching lines @@
   return code;
 }
 
 
 bool StackFrame::HasHandler() const {
   StackHandlerIterator it(this, top_handler());
   return !it.done();
 }
 
 
-#ifdef DEBUG
+#if DCHECK_IS_ON
 static bool GcSafeCodeContains(HeapObject* object, Address addr);
 #endif
 
 
 void StackFrame::IteratePc(ObjectVisitor* v,
                            Address* pc_address,
                            Code* holder) {
   Address pc = *pc_address;
   DCHECK(GcSafeCodeContains(holder, pc));
   unsigned pc_offset = static_cast<unsigned>(pc - holder->instruction_start());
@@ skipping 33 matching lines @@
     if (!iterator->can_access_heap_objects_) return JAVA_SCRIPT;
     Code::Kind kind = GetContainingCode(iterator->isolate(),
                                         *(state->pc_address))->kind();
     DCHECK(kind == Code::FUNCTION || kind == Code::OPTIMIZED_FUNCTION);
     return (kind == Code::OPTIMIZED_FUNCTION) ? OPTIMIZED : JAVA_SCRIPT;
   }
   return static_cast<StackFrame::Type>(Smi::cast(marker)->value());
 }
 
 
-#ifdef DEBUG
+#if DCHECK_IS_ON
 bool StackFrame::can_access_heap_objects() const {
   return iterator_->can_access_heap_objects_;
 }
 #endif
 
 
 StackFrame::Type StackFrame::GetCallerState(State* state) const {
   ComputeCallerState(state);
   return ComputeType(iterator_, state);
 }
@@ skipping 989 matching lines @@
   return map_word.IsForwardingAddress() ?
       map_word.ToForwardingAddress()->map() : map_word.ToMap();
 }
 
 
 static int GcSafeSizeOfCodeSpaceObject(HeapObject* object) {
   return object->SizeFromMap(GcSafeMapOfCodeSpaceObject(object));
 }
 
 
-#ifdef DEBUG
+#if DCHECK_IS_ON
 static bool GcSafeCodeContains(HeapObject* code, Address addr) {
   Map* map = GcSafeMapOfCodeSpaceObject(code);
   DCHECK(map == code->GetHeap()->code_map());
   Address start = code->address();
   Address end = code->address() + code->SizeFromMap(map);
   return start <= addr && addr < end;
 }
 #endif
 
 
@@ skipping 175 matching lines @@
   ZoneList<StackFrame*> list(10, zone);
   for (StackFrameIterator it(isolate); !it.done(); it.Advance()) {
     StackFrame* frame = AllocateFrameCopy(it.frame(), zone);
     list.Add(frame, zone);
   }
   return list.ToVector();
 }
 
 
 } }  // namespace v8::internal