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1 // Copyright 2009-2010 the V8 project authors. All rights reserved.
2 // Redistribution and use in source and binary forms, with or without
3 // modification, are permitted provided that the following conditions are
4 // met:
5 //
6 //     * Redistributions of source code must retain the above copyright
7 //       notice, this list of conditions and the following disclaimer.
8 //     * Redistributions in binary form must reproduce the above
9 //       copyright notice, this list of conditions and the following
10 //       disclaimer in the documentation and/or other materials provided
11 //       with the distribution.
12 //     * Neither the name of Google Inc. nor the names of its
13 //       contributors may be used to endorse or promote products derived
14 //       from this software without specific prior written permission.
15 //
16 // THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
17 // "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
18 // LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
19 // A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
20 // OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
21 // SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
22 // LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
23 // DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
24 // THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
25 // (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
26 // OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
27 
28 #ifndef V8_HEAP_PROFILER_H_
29 #define V8_HEAP_PROFILER_H_
30 
31 #include "isolate.h"
32 
33 namespace v8 {
34 namespace internal {
35 
36 class HeapSnapshot;
37 class HeapSnapshotsCollection;
38 
39 #define HEAP_PROFILE(heap, call)                                             \
40   do {                                                                       \
41     v8::internal::HeapProfiler* profiler = heap->isolate()->heap_profiler(); \
42     if (profiler != NULL && profiler->is_profiling()) {                      \
43       profiler->call;                                                        \
44     }                                                                        \
45   } while (false)
46 
47 // The HeapProfiler writes data to the log files, which can be postprocessed
48 // to generate .hp files for use by the GHC/Valgrind tool hp2ps.
49 class HeapProfiler {
50  public:
51   static void SetUp();
52   static void TearDown();
53 
54   static HeapSnapshot* TakeSnapshot(const char* name,
55                                     int type,
56                                     v8::ActivityControl* control);
57   static HeapSnapshot* TakeSnapshot(String* name,
58                                     int type,
59                                     v8::ActivityControl* control);
60   static int GetSnapshotsCount();
61   static HeapSnapshot* GetSnapshot(int index);
62   static HeapSnapshot* FindSnapshot(unsigned uid);
63   static void DeleteAllSnapshots();
64 
65   void ObjectMoveEvent(Address from, Address to);
66 
67   void DefineWrapperClass(
68       uint16_t class_id, v8::HeapProfiler::WrapperInfoCallback callback);
69 
70   v8::RetainedObjectInfo* ExecuteWrapperClassCallback(uint16_t class_id,
71                                                       Object** wrapper);
INLINE(bool is_profiling ())72   INLINE(bool is_profiling()) {
73     return snapshots_->is_tracking_objects();
74   }
75 
76  private:
77   HeapProfiler();
78   ~HeapProfiler();
79   HeapSnapshot* TakeSnapshotImpl(const char* name,
80                                  int type,
81                                  v8::ActivityControl* control);
82   HeapSnapshot* TakeSnapshotImpl(String* name,
83                                  int type,
84                                  v8::ActivityControl* control);
85   void ResetSnapshots();
86 
87   HeapSnapshotsCollection* snapshots_;
88   unsigned next_snapshot_uid_;
89   List<v8::HeapProfiler::WrapperInfoCallback> wrapper_callbacks_;
90 };
91 
92 } }  // namespace v8::internal
93 
94 #endif  // V8_HEAP_PROFILER_H_
95