Turn on DCHECKs and other debugging code if dcheck_always_on is 1

test/cctest/test-api.cc

 // Copyright 2012 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 22022 matching lines @@
     CompileRun("var obj = {};"
                "Object.observe(obj, function(changes) { debugger; });"
                "obj.a = 0;");
   }
   isolate->RunMicrotasks();
   isolate->SetAutorunMicrotasks(true);
   v8::Debug::SetDebugEventListener(NULL);
 }
 
 
-#ifdef DEBUG
+#ifdef ENABLE_DISASSEMBLER
 static int probes_counter = 0;
 static int misses_counter = 0;
 static int updates_counter = 0;
 
 
 static int* LookupCounter(const char* name) {
   if (strcmp(name, "c:V8.MegamorphicStubCacheProbes") == 0) {
     return &probes_counter;
   } else if (strcmp(name, "c:V8.MegamorphicStubCacheMisses") == 0) {
     return &misses_counter;
@@ skipping 13 matching lines @@
     "var a = new ClassA();"
     "var b = new ClassB();"
     "for (var i = 0; i < 10000; i++) {"
     "  fooify(a);"
     "  fooify(b);"
     "}";
 #endif
 
 
 static void StubCacheHelper(bool primary) {
-#ifdef DEBUG
+#ifdef ENABLE_DISASSEMBLER
   i::FLAG_native_code_counters = true;
   if (primary) {
     i::FLAG_test_primary_stub_cache = true;
   } else {
     i::FLAG_test_secondary_stub_cache = true;
   }
   i::FLAG_crankshaft = false;
   LocalContext env;
   env->GetIsolate()->SetCounterFunction(LookupCounter);
   v8::HandleScope scope(env->GetIsolate());
@@ skipping 2476 matching lines @@
 
   v8::Handle<v8::Value> result = CompileRun("%_GetPrototype(object)");
   CHECK(result->Equals(proto2));
 
   result = CompileRun(
       "function f() { return %_GetPrototype(object); }"
       "%OptimizeFunctionOnNextCall(f);"
       "f()");
   CHECK(result->Equals(proto2));
 }