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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 #include "v8.h"
     29 
     30 #include "heap-profiler.h"
     31 #include "profile-generator.h"
     32 
     33 namespace v8 {
     34 namespace internal {
     35 
     36 
     37 HeapProfiler::HeapProfiler()
     38     : snapshots_(new HeapSnapshotsCollection()),
     39       next_snapshot_uid_(1) {
     40 }
     41 
     42 
     43 HeapProfiler::~HeapProfiler() {
     44   delete snapshots_;
     45 }
     46 
     47 
     48 void HeapProfiler::ResetSnapshots() {
     49   delete snapshots_;
     50   snapshots_ = new HeapSnapshotsCollection();
     51 }
     52 
     53 
     54 void HeapProfiler::SetUp() {
     55   Isolate* isolate = Isolate::Current();
     56   if (isolate->heap_profiler() == NULL) {
     57     isolate->set_heap_profiler(new HeapProfiler());
     58   }
     59 }
     60 
     61 
     62 void HeapProfiler::TearDown() {
     63   Isolate* isolate = Isolate::Current();
     64   delete isolate->heap_profiler();
     65   isolate->set_heap_profiler(NULL);
     66 }
     67 
     68 
     69 HeapSnapshot* HeapProfiler::TakeSnapshot(const char* name,
     70                                          int type,
     71                                          v8::ActivityControl* control) {
     72   ASSERT(Isolate::Current()->heap_profiler() != NULL);
     73   return Isolate::Current()->heap_profiler()->TakeSnapshotImpl(name,
     74                                                                type,
     75                                                                control);
     76 }
     77 
     78 
     79 HeapSnapshot* HeapProfiler::TakeSnapshot(String* name,
     80                                          int type,
     81                                          v8::ActivityControl* control) {
     82   ASSERT(Isolate::Current()->heap_profiler() != NULL);
     83   return Isolate::Current()->heap_profiler()->TakeSnapshotImpl(name,
     84                                                                type,
     85                                                                control);
     86 }
     87 
     88 
     89 void HeapProfiler::DefineWrapperClass(
     90     uint16_t class_id, v8::HeapProfiler::WrapperInfoCallback callback) {
     91   ASSERT(class_id != v8::HeapProfiler::kPersistentHandleNoClassId);
     92   if (wrapper_callbacks_.length() <= class_id) {
     93     wrapper_callbacks_.AddBlock(
     94         NULL, class_id - wrapper_callbacks_.length() + 1);
     95   }
     96   wrapper_callbacks_[class_id] = callback;
     97 }
     98 
     99 
    100 v8::RetainedObjectInfo* HeapProfiler::ExecuteWrapperClassCallback(
    101     uint16_t class_id, Object** wrapper) {
    102   if (wrapper_callbacks_.length() <= class_id) return NULL;
    103   return wrapper_callbacks_[class_id](
    104       class_id, Utils::ToLocal(Handle<Object>(wrapper)));
    105 }
    106 
    107 
    108 HeapSnapshot* HeapProfiler::TakeSnapshotImpl(const char* name,
    109                                              int type,
    110                                              v8::ActivityControl* control) {
    111   HeapSnapshot::Type s_type = static_cast<HeapSnapshot::Type>(type);
    112   HeapSnapshot* result =
    113       snapshots_->NewSnapshot(s_type, name, next_snapshot_uid_++);
    114   bool generation_completed = true;
    115   switch (s_type) {
    116     case HeapSnapshot::kFull: {
    117       HeapSnapshotGenerator generator(result, control);
    118       generation_completed = generator.GenerateSnapshot();
    119       break;
    120     }
    121     default:
    122       UNREACHABLE();
    123   }
    124   if (!generation_completed) {
    125     delete result;
    126     result = NULL;
    127   }
    128   snapshots_->SnapshotGenerationFinished(result);
    129   return result;
    130 }
    131 
    132 
    133 HeapSnapshot* HeapProfiler::TakeSnapshotImpl(String* name,
    134                                              int type,
    135                                              v8::ActivityControl* control) {
    136   return TakeSnapshotImpl(snapshots_->names()->GetName(name), type, control);
    137 }
    138 
    139 
    140 int HeapProfiler::GetSnapshotsCount() {
    141   HeapProfiler* profiler = Isolate::Current()->heap_profiler();
    142   ASSERT(profiler != NULL);
    143   return profiler->snapshots_->snapshots()->length();
    144 }
    145 
    146 
    147 HeapSnapshot* HeapProfiler::GetSnapshot(int index) {
    148   HeapProfiler* profiler = Isolate::Current()->heap_profiler();
    149   ASSERT(profiler != NULL);
    150   return profiler->snapshots_->snapshots()->at(index);
    151 }
    152 
    153 
    154 HeapSnapshot* HeapProfiler::FindSnapshot(unsigned uid) {
    155   HeapProfiler* profiler = Isolate::Current()->heap_profiler();
    156   ASSERT(profiler != NULL);
    157   return profiler->snapshots_->GetSnapshot(uid);
    158 }
    159 
    160 
    161 void HeapProfiler::DeleteAllSnapshots() {
    162   HeapProfiler* profiler = Isolate::Current()->heap_profiler();
    163   ASSERT(profiler != NULL);
    164   profiler->ResetSnapshots();
    165 }
    166 
    167 
    168 void HeapProfiler::ObjectMoveEvent(Address from, Address to) {
    169   snapshots_->ObjectMoveEvent(from, to);
    170 }
    171 
    172 
    173 } }  // namespace v8::internal
    174