Allows turning on checked mode on a per-isolate basis

runtime/vm/service.cc

 // Copyright (c) 2013, 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/service.h"
 
 #include "include/dart_api.h"
 #include "platform/globals.h"
 
 #include "vm/compiler.h"
@@ skipping 3206 matching lines @@
       jsarr_->AddValue(isolate);
     }
   }
 
  private:
   JSONArray* jsarr_;
 };
 
 
 static bool HandleVM(JSONStream* js) {
+  Isolate* isolate = Isolate::Current();
   JSONObject jsobj(js);
   jsobj.AddProperty("type", "VM");
   jsobj.AddProperty("id", "vm");
   jsobj.AddProperty("architectureBits", static_cast<intptr_t>(kBitsPerWord));
   jsobj.AddProperty("targetCPU", CPU::Id());
   jsobj.AddProperty("hostCPU", HostCPUFeatures::hardware());
   jsobj.AddPropertyF("date", "%" Pd64 "", OS::GetCurrentTimeMillis());
   jsobj.AddProperty("version", Version::String());
   // Send pid as a string because it allows us to avoid any issues with
   // pids > 53-bits (when consumed by JavaScript).
   // TODO(johnmccutchan): Codify how integers are sent across the service.
   jsobj.AddPropertyF("pid", "%" Pd "", OS::ProcessId());
-  jsobj.AddProperty("assertsEnabled", FLAG_enable_asserts);
-  jsobj.AddProperty("typeChecksEnabled", FLAG_enable_type_checks);
+  jsobj.AddProperty("assertsEnabled", isolate->AssertsEnabled());
+  jsobj.AddProperty("typeChecksEnabled", isolate->TypeChecksEnabled());
   int64_t start_time_micros = Dart::vm_isolate()->start_time();
   int64_t uptime_micros = (OS::GetCurrentTimeMicros() - start_time_micros);
   double seconds = (static_cast<double>(uptime_micros) /
                     static_cast<double>(kMicrosecondsPerSecond));
   jsobj.AddProperty("uptime", seconds);
 
   // Construct the isolate list.
   {
     JSONArray jsarr(&jsobj, "isolates");
     ServiceIsolateVisitor visitor(&jsarr);
@@ skipping 247 matching lines @@
   while (current != NULL) {
     if (strcmp(name, current->name()) == 0) {
       return current;
     }
     current = current->next();
   }
   return NULL;
 }
 
 }  // namespace dart