Martin Kustermann
592aee4838
The change was already reverted and I accidentally relanded this. Change-Id: I62ff3367db7aaaf3a470727fdb587830a23fe53c Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/98566 Reviewed-by: Martin Kustermann <kustermann@google.com>
68 lines
1.8 KiB
C++
68 lines
1.8 KiB
C++
// Copyright (c) 2017, 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_HEAP_COMPACTOR_H_
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#define RUNTIME_VM_HEAP_COMPACTOR_H_
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#include "platform/growable_array.h"
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#include "vm/allocation.h"
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#include "vm/dart_api_state.h"
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#include "vm/globals.h"
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#include "vm/visitor.h"
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namespace dart {
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// Forward declarations.
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class FreeList;
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class Heap;
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class HeapPage;
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class RawObject;
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// Implements a sliding compactor.
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class GCCompactor : public ValueObject,
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public HandleVisitor,
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public ObjectPointerVisitor {
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public:
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GCCompactor(Thread* thread, Heap* heap)
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: HandleVisitor(thread),
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ObjectPointerVisitor(thread->isolate()),
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heap_(heap) {}
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~GCCompactor() {}
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void Compact(HeapPage* pages, FreeList* freelist, Mutex* mutex);
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private:
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friend class CompactorTask;
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void SetupImagePageBoundaries();
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void ForwardStackPointers();
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void ForwardPointer(RawObject** ptr);
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void VisitTypedDataViewPointers(RawTypedDataView* view,
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RawObject** first,
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RawObject** last);
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void VisitPointers(RawObject** first, RawObject** last);
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void VisitHandle(uword addr);
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Heap* heap_;
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struct ImagePageRange {
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uword base;
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uword size;
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};
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// There are up to 6 images to consider:
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// {instructions, data} x {vm isolate, current isolate, shared}
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static const intptr_t kMaxImagePages = 6;
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ImagePageRange image_page_ranges_[kMaxImagePages];
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// The typed data views whose inner pointer must be updated after sliding is
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// complete.
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Mutex typed_data_view_mutex_;
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MallocGrowableArray<RawTypedDataView*> typed_data_views_;
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};
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} // namespace dart
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#endif // RUNTIME_VM_HEAP_COMPACTOR_H_
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