blob: 2d6ad356830606aa0c20538a1b6f12e2cbc9ad23 [file] [log] [blame]
// Copyright (c) 2015, 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/globals.h"
#include "vm/growable_array.h"
#include "vm/isolate.h"
#include "vm/lockers.h"
#include "vm/stack_frame.h"
#include "vm/thread.h"
namespace dart {
#ifndef PRODUCT
class JSONStream;
class JSONArray;
// Unordered collection of threads relating to a particular isolate.
class ThreadRegistry {
: threads_lock_(new Monitor()),
mutator_thread_(NULL) {}
void VisitObjectPointers(ObjectPointerVisitor* visitor,
ValidationPolicy validate_frames);
void ReleaseStoreBuffers();
void AcquireMarkingStacks();
void ReleaseMarkingStacks();
Thread* mutator_thread() const { return mutator_thread_; }
#ifndef PRODUCT
void PrintJSON(JSONStream* stream) const;
// Calculates the sum of the max memory usage in bytes of each thread.
uintptr_t ThreadHighWatermarksTotalLocked() const;
intptr_t CountZoneHandles() const;
intptr_t CountScopedHandles() const;
Thread* active_list() const { return active_list_; }
Monitor* threads_lock() const { return threads_lock_; }
Thread* GetFreeThreadLocked(Isolate* isolate, bool is_mutator);
void ReturnThreadLocked(bool is_mutator, Thread* thread);
void AddToActiveListLocked(Thread* thread);
void RemoveFromActiveListLocked(Thread* thread);
Thread* GetFromFreelistLocked(Isolate* isolate);
void ReturnToFreelistLocked(Thread* thread);
// This monitor protects the threads list for an isolate, it is used whenever
// we need to iterate over threads (both active and free) in an isolate.
Monitor* threads_lock_;
Thread* active_list_; // List of active threads in the isolate.
Thread* free_list_; // Free list of Thread objects that can be reused.
// TODO(asiva): Currently we treat a mutator thread as a special thread
// and always schedule execution of Dart code on the same mutator thread
// object. The ApiLocalScope has been made thread specific but we still
// have scenarios where we do a temporary exit of an Isolate with live
// zones/handles in the API scope :
// - Dart_RunLoop()
// - IsolateSaver in Dart_NewNativePort
// Similarly, tracking async_stack_trace requires that we always reschedule
// on the same thread.
// We probably need a mechanism to return to the specific thread only
// for these specific cases. We should also determine if the embedder
// should allow exiting an isolate with live state in zones/handles in
// which case a new API for returning to the specific thread needs to be
// added.
Thread* mutator_thread_;
friend class Isolate;
friend class SafepointHandler;
} // namespace dart