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Side by Side Diff: runtime/vm/object_graph.h

Issue 292663012: Retaining path in Observatory. (Closed) Base URL: http://dart.googlecode.com/svn/branches/bleeding_edge/dart/
Patch Set: Created 6 years, 7 months ago
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1 // Copyright (c) 2014, the Dart project authors. Please see the AUTHORS file 1 // Copyright (c) 2014, the Dart project authors. Please see the AUTHORS file
2 // for details. All rights reserved. Use of this source code is governed by a 2 // for details. All rights reserved. Use of this source code is governed by a
3 // BSD-style license that can be found in the LICENSE file. 3 // BSD-style license that can be found in the LICENSE file.
4 4
5 #ifndef VM_OBJECT_GRAPH_H_ 5 #ifndef VM_OBJECT_GRAPH_H_
6 #define VM_OBJECT_GRAPH_H_ 6 #define VM_OBJECT_GRAPH_H_
7 7
8 #include "vm/allocation.h" 8 #include "vm/allocation.h"
9 #include "vm/object.h" 9 #include "vm/object.h"
10 10
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62 // (including 'root' itself). 62 // (including 'root' itself).
63 void IterateObjectsFrom(const Object& root, Visitor* visitor); 63 void IterateObjectsFrom(const Object& root, Visitor* visitor);
64 64
65 // The number of bytes retained by 'obj'. 65 // The number of bytes retained by 'obj'.
66 intptr_t SizeRetainedByInstance(const Object& obj); 66 intptr_t SizeRetainedByInstance(const Object& obj);
67 67
68 // The number of bytes retained by the set of all objects of the given class. 68 // The number of bytes retained by the set of all objects of the given class.
69 intptr_t SizeRetainedByClass(intptr_t class_id); 69 intptr_t SizeRetainedByClass(intptr_t class_id);
70 70
71 // Finds some retaining path from the isolate roots to 'obj'. Populates the 71 // Finds some retaining path from the isolate roots to 'obj'. Populates the
72 // provided array, starting with a direct parent of 'obj', up to the smaller 72 // provided array, starting 'obj' itself, up to the smaller of the length of
73 // of the length of the array and the length of the path. Returns the length 73 // the array and the length of the path. Returns the length of the path. A
74 // of the path. A null input array behaves like a zero-length input array. 74 // null input array behaves like a zero-length input array.
75 // 75 //
76 // To break the trivial path, the handle 'obj' is temporarily cleared during 76 // To break the trivial path, the handle 'obj' is temporarily cleared during
77 // the search, but restored before returning. If no path is found (i.e., the 77 // the search, but restored before returning. If no path is found (i.e., the
78 // provided handle was the only way to reach the object), zero is returned. 78 // provided handle was the only way to reach the object), zero is returned.
79 intptr_t RetainingPath(Object* obj, const Array& path); 79 intptr_t RetainingPath(Object* obj, const Array& path);
80 80
81 private: 81 private:
82 DISALLOW_IMPLICIT_CONSTRUCTORS(ObjectGraph); 82 DISALLOW_IMPLICIT_CONSTRUCTORS(ObjectGraph);
83 }; 83 };
84 84
85 } // namespace dart 85 } // namespace dart
86 86
87 #endif // VM_OBJECT_GRAPH_H_ 87 #endif // VM_OBJECT_GRAPH_H_
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