Alexander Aprelev
324718fadd
This reverts commit 7e1aa67855 as this
regresses flutter stock_layout_iterations by about ~9% on Moto G4.
Fixes https://github.com/dart-lang/sdk/issues/35694
Change-Id: I3c76ee868c64e4b1ed947bd2d295aa8a07d9d1d0
Reviewed-on: https://dart-review.googlesource.com/c/90140
Commit-Queue: Alexander Aprelev <aam@google.com>
Commit-Queue: Ryan Macnak <rmacnak@google.com>
Reviewed-by: Ryan Macnak <rmacnak@google.com>
Reviewed-by: Alexander Aprelev <aam@google.com>
Auto-Submit: Alexander Aprelev <aam@google.com>
92 lines
3.0 KiB
C++
92 lines
3.0 KiB
C++
// 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.
|
|
|
|
#ifndef RUNTIME_VM_THREAD_REGISTRY_H_
|
|
#define RUNTIME_VM_THREAD_REGISTRY_H_
|
|
|
|
#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;
|
|
#endif
|
|
|
|
// Unordered collection of threads relating to a particular isolate.
|
|
class ThreadRegistry {
|
|
public:
|
|
ThreadRegistry()
|
|
: threads_lock_(new Monitor()),
|
|
active_list_(NULL),
|
|
free_list_(NULL),
|
|
mutator_thread_(NULL) {}
|
|
~ThreadRegistry();
|
|
|
|
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;
|
|
#endif
|
|
|
|
// 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;
|
|
|
|
private:
|
|
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;
|
|
DISALLOW_COPY_AND_ASSIGN(ThreadRegistry);
|
|
};
|
|
|
|
} // namespace dart
|
|
|
|
#endif // RUNTIME_VM_THREAD_REGISTRY_H_
|