cshapiro@google.com
0928c651e5
The previous algorithm would visit each pointer in the heap and verify it without regard for whether the pointer had already been visited. The new algorithm computes the set of allocated objects and verifies each object in the set. In a second pass, each pointer is visited and tested for membership in the set. BUG=2606 Review URL: https://chromiumcodereview.appspot.com//10696029 git-svn-id: https://dart.googlecode.com/svn/branches/bleeding_edge/dart@9532 260f80e4-7a28-3924-810f-c04153c831b5
78 lines
1.8 KiB
C++
78 lines
1.8 KiB
C++
// Copyright (c) 2011, 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 VM_VISITOR_H_
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#define VM_VISITOR_H_
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#include "vm/globals.h"
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namespace dart {
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// Forward declarations.
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class Isolate;
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class RawObject;
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// An object pointer visitor interface.
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class ObjectPointerVisitor {
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public:
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explicit ObjectPointerVisitor(Isolate* isolate) : isolate_(isolate) {}
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virtual ~ObjectPointerVisitor() {}
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Isolate* isolate() const { return isolate_; }
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// Range of pointers to visit 'first' <= pointer <= 'last'.
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virtual void VisitPointers(RawObject** first, RawObject** last) = 0;
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// len argument is the number of pointers to visit starting from 'p'.
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void VisitPointers(RawObject** p, intptr_t len) {
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VisitPointers(p, (p + len - 1));
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}
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void VisitPointer(RawObject** p) { VisitPointers(p , p); }
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private:
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Isolate* isolate_;
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DISALLOW_IMPLICIT_CONSTRUCTORS(ObjectPointerVisitor);
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};
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// An object visitor interface.
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class ObjectVisitor {
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public:
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explicit ObjectVisitor(Isolate* isolate) : isolate_(isolate) {}
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virtual ~ObjectVisitor() {}
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Isolate* isolate() const { return isolate_; }
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// Invoked for each object.
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virtual void VisitObject(RawObject* obj) = 0;
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private:
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Isolate* isolate_;
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DISALLOW_COPY_AND_ASSIGN(ObjectVisitor);
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};
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// An object finder visitor interface.
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class FindObjectVisitor {
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public:
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explicit FindObjectVisitor(Isolate* isolate) : isolate_(isolate) {}
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virtual ~FindObjectVisitor() {}
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// Check if object matches find condition.
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virtual bool FindObject(RawObject* obj) = 0;
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private:
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Isolate* isolate_;
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DISALLOW_IMPLICIT_CONSTRUCTORS(FindObjectVisitor);
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};
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} // namespace dart
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#endif // VM_VISITOR_H_
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