Initial design for background compilation

runtime/vm/isolate.cc

Index: runtime/vm/isolate.cc
diff --git a/runtime/vm/isolate.cc b/runtime/vm/isolate.cc
index 9229d81de8a19b867baa2a289cfda45c3b02f751..da6a1617ac828e1701e04e844e67dc465ef4f5c6 100644
--- a/runtime/vm/isolate.cc
+++ b/runtime/vm/isolate.cc
@@ -8,7 +8,9 @@
 #include "include/dart_native_api.h"
 #include "platform/assert.h"
 #include "platform/json.h"
+#include "vm/class_finalizer.h"
 #include "vm/code_observers.h"
+#include "vm/compiler.h"
 #include "vm/compiler_stats.h"
 #include "vm/coverage.h"
 #include "vm/dart_api_message.h"
@@ -24,7 +26,6 @@
 #include "vm/object_store.h"
 #include "vm/object.h"
 #include "vm/os_thread.h"
-#include "vm/parser.h"
 #include "vm/port.h"
 #include "vm/profiler.h"
 #include "vm/reusable_handles.h"
@@ -746,6 +747,7 @@ Isolate::Isolate(const Dart_IsolateFlags& api_flags)
       gc_epilogue_callback_(NULL),
       defer_finalization_count_(0),
       deopt_context_(NULL),
+      compile_optimized_task_(NULL),
       compiler_stats_(NULL),
       is_service_isolate_(false),
       stacktrace_(NULL),
@@ -760,6 +762,7 @@ Isolate::Isolate(const Dart_IsolateFlags& api_flags)
       default_tag_(UserTag::null()),
       collected_closures_(GrowableObjectArray::null()),
       deoptimized_code_array_(GrowableObjectArray::null()),
+      background_compilation_queue_(GrowableObjectArray::null()),
       pending_service_extension_calls_(GrowableObjectArray::null()),
       registered_service_extension_handlers_(GrowableObjectArray::null()),
       metrics_list_head_(NULL),
@@ -1691,6 +1694,8 @@ void Isolate::Shutdown() {
   }
 #endif
 
+  CompileOptimizedTask::Stop(compile_optimized_task_);
+
   // TODO(5411455): For now just make sure there are no current isolates
   // as we are shutting down the isolate.
   Thread::ExitIsolate();
@@ -1766,6 +1771,9 @@ void Isolate::VisitObjectPointers(ObjectPointerVisitor* visitor,
   // Visit array of closures pending precompilation.
   visitor->VisitPointer(reinterpret_cast<RawObject**>(&collected_closures_));
 
+  visitor->VisitPointer(reinterpret_cast<RawObject**>(
+      &background_compilation_queue_));
+
   // Visit the deoptimized code array which is stored in the isolate.
   visitor->VisitPointer(
       reinterpret_cast<RawObject**>(&deoptimized_code_array_));
@@ -1985,6 +1993,12 @@ void Isolate::set_deoptimized_code_array(const GrowableObjectArray& value) {
 }
 
 
+void Isolate::set_background_compilation_queue(
+    const GrowableObjectArray& value) {
+  background_compilation_queue_ = value.raw();
+}
+
+
 void Isolate::TrackDeoptimizedCode(const Code& code) {
   ASSERT(!code.IsNull());
   const GrowableObjectArray& deoptimized_code =