Remove many features when building product mode

runtime/vm/code_generator.cc

Index: runtime/vm/code_generator.cc
diff --git a/runtime/vm/code_generator.cc b/runtime/vm/code_generator.cc
index 0a207de71a5df68920f4bbeb5741de86c09a8019..ddc444aefa84af2e9107f43a7dec03217e95ff60 100644
--- a/runtime/vm/code_generator.cc
+++ b/runtime/vm/code_generator.cc
@@ -705,6 +705,7 @@ static void CheckResultError(const Object& result) {
 // Gets called from debug stub when code reaches a breakpoint
 // set on a runtime stub call.
 DEFINE_RUNTIME_ENTRY(BreakpointRuntimeHandler, 0) {
+#ifndef PRODUCT
   DartFrameIterator iterator;
   StackFrame* caller_frame = iterator.NextFrame();
   ASSERT(caller_frame != NULL);
@@ -716,16 +717,23 @@ DEFINE_RUNTIME_ENTRY(BreakpointRuntimeHandler, 0) {
     UNREACHABLE();
   }
   arguments.SetReturn(orig_stub);
+#else
+  UNREACHABLE();
+#endif  // !PRODUCT
 }
 
 
 DEFINE_RUNTIME_ENTRY(SingleStepHandler, 0) {
+#ifndef PRODUCT
   const Error& error =
       Error::Handle(isolate->debugger()->DebuggerStepCallback());
   if (!error.IsNull()) {
     Exceptions::PropagateError(error);
     UNREACHABLE();
   }
+#else
+  UNREACHABLE();
+#endif  // !PRODUCT
 }
 
 
@@ -1242,6 +1250,7 @@ DEFINE_RUNTIME_ENTRY(InvokeClosureNoSuchMethod, 3) {
 
 
 static bool CanOptimizeFunction(const Function& function, Thread* thread) {
+#ifndef PRODUCT
   Isolate* isolate = thread->isolate();
   if (isolate->debugger()->IsStepping() ||
       isolate->debugger()->HasBreakpoint(function, thread->zone())) {
@@ -1250,6 +1259,7 @@ static bool CanOptimizeFunction(const Function& function, Thread* thread) {
     function.set_usage_counter(0);
     return false;
   }
+#endif
   if (function.deoptimization_counter() >=
       FLAG_max_deoptimization_counter_threshold) {
     if (FLAG_trace_failed_optimization_attempts ||
@@ -1371,7 +1381,7 @@ DEFINE_RUNTIME_ENTRY(StackOverflow, 0) {
     // TODO(turnidge): Consider using DeoptimizeAt instead.
     DeoptimizeFunctionsOnStack();
   }
-  if (do_stacktrace) {
+  if (FLAG_support_debugger && do_stacktrace) {
     String& var_name = String::Handle();
     Instance& var_value = Instance::Handle();
     DebuggerStackTrace* stack = isolate->debugger()->StackTrace();