Remove many features when building product mode

runtime/vm/exceptions.cc

 // Copyright (c) 2011, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 #include "vm/exceptions.h"
 
 #include "platform/address_sanitizer.h"
 
 #include "vm/dart_api_impl.h"
 #include "vm/dart_entry.h"
@@ skipping 471 matching lines @@
   // Throw TypeError or CastError instance.
   Exceptions::ThrowByType(exception_type, args);
   UNREACHABLE();
 }
 
 
 void Exceptions::Throw(Thread* thread, const Instance& exception) {
   // Do not notify debugger on stack overflow and out of memory exceptions.
   // The VM would crash when the debugger calls back into the VM to
   // get values of variables.
-  Isolate* isolate = thread->isolate();
-  if (exception.raw() != isolate->object_store()->out_of_memory() &&
-      exception.raw() != isolate->object_store()->stack_overflow()) {
-    isolate->debugger()->SignalExceptionThrown(exception);
+  if (FLAG_support_debugger) {
+    Isolate* isolate = thread->isolate();
+    if (exception.raw() != isolate->object_store()->out_of_memory() &&
+        exception.raw() != isolate->object_store()->stack_overflow()) {
+      isolate->debugger()->SignalExceptionThrown(exception);
+    }
   }
   // Null object is a valid exception object.
   ThrowExceptionHelper(thread, exception,
       Stacktrace::Handle(thread->zone()), false);
 }
 
 void Exceptions::ReThrow(Thread* thread,
                          const Instance& exception,
                          const Instance& stacktrace) {
   // Null object is a valid exception object.
@@ skipping 182 matching lines @@
 void Exceptions::PrintStackTraceAndAbort(const char* reason) {
   const Instance& stacktrace = Instance::Handle(CurrentStacktrace());
 
   OS::PrintErr("\n\n\nAborting due to %s. Stacktrace:\n%s\n",
                reason,
                stacktrace.ToCString());
   OS::Abort();
 }
 
 }  // namespace dart