Add support for enabling DCHECKs in release mode

src/deoptimizer.cc

 // Copyright 2013 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/v8.h"
 
 #include "src/accessors.h"
 #include "src/codegen.h"
 #include "src/deoptimizer.h"
 #include "src/disasm.h"
@@ skipping 587 matching lines @@
   if (type == EAGER || type == SOFT || type == LAZY) {
     DCHECK(compiled_code_->kind() != Code::FUNCTION);
   }
 #endif
 
   StackFrame::Type frame_type = function == NULL
       ? StackFrame::STUB
       : StackFrame::JAVA_SCRIPT;
   trace_scope_ = TraceEnabledFor(type, frame_type) ?
       new CodeTracer::Scope(isolate->GetCodeTracer()) : NULL;
-#ifdef DEBUG
-  CHECK(AllowHeapAllocation::IsAllowed());
+#if DCHECK_IS_ON
+  DCHECK(AllowHeapAllocation::IsAllowed());
   disallow_heap_allocation_ = new DisallowHeapAllocation();
-#endif  // DEBUG
+#endif  // DCHECK_IS_ON
   unsigned size = ComputeInputFrameSize();
   input_ = new(size) FrameDescription(size, function);
   input_->SetFrameType(frame_type);
 }
 
 
 Code* Deoptimizer::FindOptimizedCode(JSFunction* function,
                                      Code* optimized_code) {
   switch (bailout_type_) {
     case Deoptimizer::SOFT:
@@ skipping 31 matching lines @@
 
 
 void Deoptimizer::DeleteFrameDescriptions() {
   delete input_;
   for (int i = 0; i < output_count_; ++i) {
     if (output_[i] != input_) delete output_[i];
   }
   delete[] output_;
   input_ = NULL;
   output_ = NULL;
-#ifdef DEBUG
-  CHECK(!AllowHeapAllocation::IsAllowed());
-  CHECK(disallow_heap_allocation_ != NULL);
+#if DCHECK_IS_ON
+  DCHECK(!AllowHeapAllocation::IsAllowed());
+  DCHECK(disallow_heap_allocation_ != NULL);
   delete disallow_heap_allocation_;
   disallow_heap_allocation_ = NULL;
-#endif  // DEBUG
+#endif  // DCHECK_IS_ON
 }
 
 
 Address Deoptimizer::GetDeoptimizationEntry(Isolate* isolate,
                                             int id,
                                             BailoutType type,
                                             GetEntryMode mode) {
   CHECK_GE(id, 0);
   if (id >= kMaxNumberOfEntries) return NULL;
   if (mode == ENSURE_ENTRY_CODE) {
@@ skipping 2948 matching lines @@
 
 
 void DeoptimizedFrameInfo::Iterate(ObjectVisitor* v) {
   v->VisitPointer(bit_cast<Object**>(&function_));
   v->VisitPointer(&context_);
   v->VisitPointers(parameters_, parameters_ + parameters_count_);
   v->VisitPointers(expression_stack_, expression_stack_ + expression_count_);
 }
 
 } }  // namespace v8::internal