Pass field to mutator thread so that it can be marked as boxed and all dependent code deoptimized

runtime/vm/isolate.h

 // 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.
 
 #ifndef VM_ISOLATE_H_
 #define VM_ISOLATE_H_
 
 #include "include/dart_api.h"
 #include "platform/assert.h"
 #include "vm/atomic.h"
@@ skipping 35 matching lines @@
 class ObjectStore;
 class RawInstance;
 class RawArray;
 class RawContext;
 class RawDouble;
 class RawGrowableObjectArray;
 class RawMint;
 class RawObject;
 class RawInteger;
 class RawError;
+class RawField;
 class RawFloat32x4;
 class RawInt32x4;
 class RawUserTag;
 class SafepointHandler;
 class SampleBuffer;
 class SendPort;
 class ServiceIdZone;
 class Simulator;
 class StackResource;
 class StackZone;
@@ skipping 569 matching lines @@
   void ResetFieldInvalidationGen() { field_invalidation_gen_ = kInvalidGen; }
   uint32_t field_invalidation_gen() const { return field_invalidation_gen_; }
 
   void IncrPrefixInvalidationGen() {
     prefix_invalidation_gen_++;
     if (prefix_invalidation_gen_ == kInvalidGen) prefix_invalidation_gen_++;
   }
   void ResetPrefixInvalidationGen() { prefix_invalidation_gen_ = kInvalidGen; }
   uint32_t prefix_invalidation_gen() const { return prefix_invalidation_gen_; }
 
+  // Used by background compiler which field became boxed and must trigger
+  // deoptimization in the mutator thread.
+  void AddDeoptimizingBoxedField(const Field& field);
+  // Returns Field::null() if none available in the list.
+  RawField* GetDeoptimizingBoxedField();
+
   RawObject* InvokePendingServiceExtensionCalls();
   void AppendServiceExtensionCall(const Instance& closure,
                            const String& method_name,
                            const Array& parameter_keys,
                            const Array& parameter_values,
                            const Instance& reply_port,
                            const Instance& id);
   void RegisterServiceExtensionHandler(const String& name,
                                        const Instance& closure);
   RawInstance* LookupServiceExtensionHandler(const String& name);
@@ skipping 182 matching lines @@
   // Used to wake the isolate when it is in the pause event loop.
   Monitor* pause_loop_monitor_;
 
   // Invalidation generations; used to track events occuring in parallel
   // to background compilation. The counters may overflow, which is OK
   // since we check for equality to detect if an event occured.
   uint32_t cha_invalidation_gen_;
   uint32_t field_invalidation_gen_;
   uint32_t prefix_invalidation_gen_;
 
+  // Protect access to boxed_field_list_.
+  Monitor* boxed_field_list_monitor_;
+  // List of fields that became boxed and that trigger deoptimization.
+  RawGrowableObjectArray* boxed_field_list_;
+
   // This guards spawn_count_. An isolate cannot complete shutdown and be
   // destroyed while there are child isolates in the midst of a spawn.
   Monitor* spawn_count_monitor_;
   intptr_t spawn_count_;
 
 #define ISOLATE_METRIC_VARIABLE(type, variable, name, unit)                    \
   type metric_##variable##_;
   ISOLATE_METRIC_LIST(ISOLATE_METRIC_VARIABLE);
 #undef ISOLATE_METRIC_VARIABLE
 
@@ skipping 163 matching lines @@
   intptr_t* spawn_count_;
 
   Isolate::Flags isolate_flags_;
   bool paused_;
   bool errors_are_fatal_;
 };
 
 }  // namespace dart
 
 #endif  // VM_ISOLATE_H_