mirror of
https://github.com/dart-lang/sdk
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425a42e3be
This reverts commit 5daaa7d9eb.
Reason for revert: internal crashes
Original change's description:
> [vm, gc] Mark through new-space.
>
> - Initial and final marking no longer visit all of new-space, reducing the STW pause for major GC.
> - A scavenge during concurrent marking must forward / filter objects in the marking worklist that are moved / collected, increasing the STW pause for minor GC.
> - Unreachable intergenerational cycles and weak references are collected in the next mark-sweep instead of first requiring enough scavenges to promote the whole cycle or weak target into old-space.
> - Artificial minor GCs are no longer needed to avoid memory leaks from back-to-back major GCs.
> - reachabilityBarrier is now just a count of major GCs.
>
> TEST=ci
> Change-Id: I4a6a23273d8ecb78c640f054731d4ceb737bfc4d
> Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/325840
> Reviewed-by: Siva Annamalai <asiva@google.com>
> Commit-Queue: Ryan Macnak <rmacnak@google.com>
Change-Id: I8a50074db343c63c14f0487ae8b4f5fee2c4ae76
Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/330720
Reviewed-by: Ryan Macnak <rmacnak@google.com>
Commit-Queue: Slava Egorov <vegorov@google.com>
Bot-Commit: Rubber Stamper <rubber-stamper@appspot.gserviceaccount.com>
74 lines
2.3 KiB
C++
74 lines
2.3 KiB
C++
// Copyright (c) 2015, the Dart project authors. Please see the AUTHORS file
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// for details. All rights reserved. Use of this source code is governed by a
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// BSD-style license that can be found in the LICENSE file.
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#ifndef RUNTIME_VM_THREAD_REGISTRY_H_
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#define RUNTIME_VM_THREAD_REGISTRY_H_
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#include "vm/globals.h"
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#include "vm/growable_array.h"
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#include "vm/isolate.h"
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#include "vm/lockers.h"
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#include "vm/stack_frame.h"
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#include "vm/thread.h"
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namespace dart {
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#ifndef PRODUCT
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class JSONStream;
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class JSONArray;
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#endif
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// Unordered collection of threads relating to a particular isolate group.
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class ThreadRegistry {
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public:
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ThreadRegistry()
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: threads_lock_(),
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active_list_(nullptr),
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free_list_(nullptr),
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active_isolates_count_(0) {}
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~ThreadRegistry();
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void VisitObjectPointers(IsolateGroup* isolate_group_of_interest,
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ObjectPointerVisitor* visitor,
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ValidationPolicy validate_frames);
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void ForEachThread(std::function<void(Thread* thread)> callback);
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void ReleaseStoreBuffers();
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void AcquireMarkingStacks();
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void ReleaseMarkingStacks();
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// Concurrent-approximate number of active isolates in the active_list
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intptr_t active_isolates_count() { return active_isolates_count_.load(); }
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Monitor* threads_lock() const { return &threads_lock_; }
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#ifndef PRODUCT
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void PrintJSON(JSONStream* stream) const;
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#endif
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private:
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Thread* active_list() const { return active_list_; }
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Thread* GetFreeThreadLocked(bool is_vm_isolate);
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void ReturnThreadLocked(Thread* thread);
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void AddToActiveListLocked(Thread* thread);
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void RemoveFromActiveListLocked(Thread* thread);
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Thread* GetFromFreelistLocked(bool is_vm_isolate);
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void ReturnToFreelistLocked(Thread* thread);
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// This monitor protects the threads list for an isolate, it is used whenever
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// we need to iterate over threads (both active and free) in an isolate.
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mutable Monitor threads_lock_;
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Thread* active_list_; // List of active threads in the isolate.
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Thread* free_list_; // Free list of Thread objects that can be reused.
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RelaxedAtomic<intptr_t> active_isolates_count_;
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friend class Thread;
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friend class SafepointHandler;
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DISALLOW_COPY_AND_ASSIGN(ThreadRegistry);
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};
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} // namespace dart
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#endif // RUNTIME_VM_THREAD_REGISTRY_H_
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