VM: Fix snapshoting slow-down caused by 99c6a18a1bc2a4f13d8dd027a597fdca0f2d6e0c.

runtime/vm/dart_api_impl.cc

Index: runtime/vm/dart_api_impl.cc
diff --git a/runtime/vm/dart_api_impl.cc b/runtime/vm/dart_api_impl.cc
index 419eeebc1329563ab816b56325092a4da9f29967..a2137476e04e0c7453cfc80af6126937fcbc111c 100644
--- a/runtime/vm/dart_api_impl.cc
+++ b/runtime/vm/dart_api_impl.cc
@@ -6114,6 +6114,11 @@ Dart_SetFileModifiedCallback(Dart_FileModifiedCallback file_mod_callback) {
 }
 
 
+DART_EXPORT bool Dart_IsReloading() {
+  return true;

[siva, 2017/05/23 18:48:37]

Should this be false as there is no reloading in PRODUCT mode?

[Vyacheslav Egorov (Google), 2017/05/23 20:00:48]

Yep, this was a typo.

I fixed it in the local checkout but only after I uploaded CL.

+}
+
+
 DART_EXPORT void Dart_GlobalTimelineSetRecordedStreams(int64_t stream_mask) {
   return;
 }
@@ -6249,6 +6254,14 @@ Dart_SetFileModifiedCallback(Dart_FileModifiedCallback file_modified_callback) {
 }
 
 
+DART_EXPORT bool Dart_IsReloading() {
+  Thread* thread = Thread::Current();
+  Isolate* isolate = thread->isolate();
+  CHECK_ISOLATE(isolate);
+  return isolate->IsReloading();
+}
+
+
 DART_EXPORT void Dart_GlobalTimelineSetRecordedStreams(int64_t stream_mask) {
   if (!FLAG_support_timeline) {
     return;