Ryan Macnak
a6ffc74a4a
Instances whose layout must agree with a layout determined by Dart code are not switched: Array, GrowableObjectArray, Closure, LinkedHashMap. TEST=ci Change-Id: I19baf6473a29dd14f84aa1e087eee16b0e6e9d77 Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/193442 Commit-Queue: Ryan Macnak <rmacnak@google.com> Reviewed-by: Siva Annamalai <asiva@google.com> Reviewed-by: Liam Appelbe <liama@google.com>
79 lines
2.2 KiB
C++
79 lines
2.2 KiB
C++
// Copyright (c) 2017, 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_HEAP_COMPACTOR_H_
|
|
#define RUNTIME_VM_HEAP_COMPACTOR_H_
|
|
|
|
#include "platform/growable_array.h"
|
|
|
|
#include "vm/allocation.h"
|
|
#include "vm/dart_api_state.h"
|
|
#include "vm/globals.h"
|
|
#include "vm/visitor.h"
|
|
|
|
namespace dart {
|
|
|
|
// Forward declarations.
|
|
class FreeList;
|
|
class Heap;
|
|
class OldPage;
|
|
|
|
// Implements a sliding compactor.
|
|
class GCCompactor : public ValueObject,
|
|
public HandleVisitor,
|
|
public ObjectPointerVisitor {
|
|
public:
|
|
GCCompactor(Thread* thread, Heap* heap)
|
|
: HandleVisitor(thread),
|
|
ObjectPointerVisitor(thread->isolate_group()),
|
|
heap_(heap) {}
|
|
~GCCompactor() { free(image_page_ranges_); }
|
|
|
|
void Compact(OldPage* pages, FreeList* freelist, Mutex* mutex);
|
|
|
|
private:
|
|
friend class CompactorTask;
|
|
|
|
void SetupImagePageBoundaries();
|
|
void ForwardStackPointers();
|
|
void ForwardPointer(ObjectPtr* ptr);
|
|
void ForwardCompressedPointer(uword heap_base, CompressedObjectPtr* ptr);
|
|
void VisitTypedDataViewPointers(TypedDataViewPtr view,
|
|
CompressedObjectPtr* first,
|
|
CompressedObjectPtr* last);
|
|
void VisitPointers(ObjectPtr* first, ObjectPtr* last);
|
|
void VisitCompressedPointers(uword heap_base,
|
|
CompressedObjectPtr* first,
|
|
CompressedObjectPtr* last);
|
|
void VisitHandle(uword addr);
|
|
|
|
Heap* heap_;
|
|
|
|
struct ImagePageRange {
|
|
uword start;
|
|
uword end;
|
|
};
|
|
static int CompareImagePageRanges(const ImagePageRange* a,
|
|
const ImagePageRange* b) {
|
|
if (a->start < b->start) {
|
|
return -1;
|
|
} else if (a->start == b->start) {
|
|
return 0;
|
|
} else {
|
|
return 1;
|
|
}
|
|
}
|
|
intptr_t image_page_hi_ = 0;
|
|
ImagePageRange* image_page_ranges_ = nullptr;
|
|
|
|
// The typed data views whose inner pointer must be updated after sliding is
|
|
// complete.
|
|
Mutex typed_data_view_mutex_;
|
|
MallocGrowableArray<TypedDataViewPtr> typed_data_views_;
|
|
};
|
|
|
|
} // namespace dart
|
|
|
|
#endif // RUNTIME_VM_HEAP_COMPACTOR_H_
|