Implement safepointing of threads

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 "include/dart_native_api.h"
 #include "platform/globals.h"
 
@@ skipping 124 matching lines @@
   }
   intptr_t num_streams = sizeof(streams_) /
                          sizeof(streams_[0]);
   for (intptr_t i = 0; i < num_streams; i++) {
     if (strcmp(stream_id, streams_[i]->id()) == 0) {
       streams_[i]->set_enabled(true);
       return true;
     }
   }
   if (stream_listen_callback_) {
+    Thread* T = Thread::Current();
+    TransitionVMToNative transition(T);
     return (*stream_listen_callback_)(stream_id);
   }
   return false;
 }
 
 
 void Service::CancelStream(const char* stream_id) {
   if (FLAG_trace_service) {
     OS::Print("vm-service: stopping stream '%s'\n",
               stream_id);
   }
   intptr_t num_streams = sizeof(streams_) /
                          sizeof(streams_[0]);
   for (intptr_t i = 0; i < num_streams; i++) {
     if (strcmp(stream_id, streams_[i]->id()) == 0) {
       streams_[i]->set_enabled(false);
       return;
     }
   }
   if (stream_cancel_callback_) {
+    Thread* T = Thread::Current();
+    TransitionVMToNative transition(T);
     return (*stream_cancel_callback_)(stream_id);
   }
 }
 
 RawObject* Service::RequestAssets() {
   Thread* T = Thread::Current();
+  TransitionVMToNative transition(T);
   Api::Scope api_scope(T);
   if (get_service_assets_callback_ == NULL) {
     return Object::null();
   }
   Dart_Handle handle = get_service_assets_callback_();
   if (Dart_IsError(handle)) {
     Dart_PropagateError(handle);
   }
   const Object& object = Object::Handle(Api::UnwrapHandle(handle));
   if (object.IsNull()) {
@@ skipping 3675 matching lines @@
     const ServiceMethodDescriptor& method = service_methods_[i];
     if (strcmp(method_name, method.name) == 0) {
       return &method;
     }
   }
   return NULL;
 }
 
 
 }  // namespace dart