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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 "heap-snapshot-generator-inl.h"
     32 
     33 namespace v8 {
     34 namespace internal {
     35 
     36 HeapProfiler::HeapProfiler(Heap* heap)
     37     : snapshots_(new HeapSnapshotsCollection(heap)),
     38       next_snapshot_uid_(1) {
     39 }
     40 
     41 
     42 HeapProfiler::~HeapProfiler() {
     43   delete snapshots_;
     44 }
     45 
     46 
     47 void HeapProfiler::DeleteAllSnapshots() {
     48   Heap* the_heap = heap();
     49   delete snapshots_;
     50   snapshots_ = new HeapSnapshotsCollection(the_heap);
     51 }
     52 
     53 
     54 void HeapProfiler::DefineWrapperClass(
     55     uint16_t class_id, v8::HeapProfiler::WrapperInfoCallback callback) {
     56   ASSERT(class_id != v8::HeapProfiler::kPersistentHandleNoClassId);
     57   if (wrapper_callbacks_.length() <= class_id) {
     58     wrapper_callbacks_.AddBlock(
     59         NULL, class_id - wrapper_callbacks_.length() + 1);
     60   }
     61   wrapper_callbacks_[class_id] = callback;
     62 }
     63 
     64 
     65 v8::RetainedObjectInfo* HeapProfiler::ExecuteWrapperClassCallback(
     66     uint16_t class_id, Object** wrapper) {
     67   if (wrapper_callbacks_.length() <= class_id) return NULL;
     68   return wrapper_callbacks_[class_id](
     69       class_id, Utils::ToLocal(Handle<Object>(wrapper)));
     70 }
     71 
     72 
     73 HeapSnapshot* HeapProfiler::TakeSnapshot(
     74     const char* name,
     75     v8::ActivityControl* control,
     76     v8::HeapProfiler::ObjectNameResolver* resolver) {
     77   HeapSnapshot* result = snapshots_->NewSnapshot(name, next_snapshot_uid_++);
     78   {
     79     HeapSnapshotGenerator generator(result, control, resolver, heap());
     80     if (!generator.GenerateSnapshot()) {
     81       delete result;
     82       result = NULL;
     83     }
     84   }
     85   snapshots_->SnapshotGenerationFinished(result);
     86   return result;
     87 }
     88 
     89 
     90 HeapSnapshot* HeapProfiler::TakeSnapshot(
     91     String* name,
     92     v8::ActivityControl* control,
     93     v8::HeapProfiler::ObjectNameResolver* resolver) {
     94   return TakeSnapshot(snapshots_->names()->GetName(name), control, resolver);
     95 }
     96 
     97 
     98 void HeapProfiler::StartHeapObjectsTracking() {
     99   snapshots_->StartHeapObjectsTracking();
    100 }
    101 
    102 
    103 SnapshotObjectId HeapProfiler::PushHeapObjectsStats(OutputStream* stream) {
    104   return snapshots_->PushHeapObjectsStats(stream);
    105 }
    106 
    107 
    108 void HeapProfiler::StopHeapObjectsTracking() {
    109   snapshots_->StopHeapObjectsTracking();
    110 }
    111 
    112 
    113 size_t HeapProfiler::GetMemorySizeUsedByProfiler() {
    114   return snapshots_->GetUsedMemorySize();
    115 }
    116 
    117 
    118 int HeapProfiler::GetSnapshotsCount() {
    119   return snapshots_->snapshots()->length();
    120 }
    121 
    122 
    123 HeapSnapshot* HeapProfiler::GetSnapshot(int index) {
    124   return snapshots_->snapshots()->at(index);
    125 }
    126 
    127 
    128 SnapshotObjectId HeapProfiler::GetSnapshotObjectId(Handle<Object> obj) {
    129   if (!obj->IsHeapObject())
    130     return v8::HeapProfiler::kUnknownObjectId;
    131   return snapshots_->FindObjectId(HeapObject::cast(*obj)->address());
    132 }
    133 
    134 
    135 void HeapProfiler::ObjectMoveEvent(Address from, Address to) {
    136   snapshots_->ObjectMoveEvent(from, to);
    137 }
    138 
    139 void HeapProfiler::SetRetainedObjectInfo(UniqueId id,
    140                                          RetainedObjectInfo* info) {
    141   // TODO(yurus, marja): Don't route this information through GlobalHandles.
    142   heap()->isolate()->global_handles()->SetRetainedObjectInfo(id, info);
    143 }
    144 
    145 } }  // namespace v8::internal
    146