uid_(uid),
root_index_(HeapEntry::kNoEntry),
gc_roots_index_(HeapEntry::kNoEntry),
- natives_root_index_(HeapEntry::kNoEntry),
max_snapshot_js_object_id_(0) {
STATIC_ASSERT(
sizeof(HeapGraphEdge) ==
}
+void HeapSnapshot::AddSyntheticRootEntries() {
+ AddRootEntry();
+ AddGcRootsEntry();
+ SnapshotObjectId id = HeapObjectsMap::kGcRootsFirstSubrootId;
+ for (int tag = 0; tag < VisitorSynchronization::kNumberOfSyncTags; tag++) {
+ AddGcSubrootEntry(tag, id);
+ id += HeapObjectsMap::kObjectIdStep;
+ }
+ DCHECK(HeapObjectsMap::kFirstAvailableObjectId == id);
+}
+
+
HeapEntry* HeapSnapshot::AddRootEntry() {
DCHECK(root_index_ == HeapEntry::kNoEntry);
DCHECK(entries_.is_empty()); // Root entry must be the first one.
}
-HeapEntry* HeapSnapshot::AddGcSubrootEntry(int tag) {
+HeapEntry* HeapSnapshot::AddGcSubrootEntry(int tag, SnapshotObjectId id) {
DCHECK(gc_subroot_indexes_[tag] == HeapEntry::kNoEntry);
DCHECK(0 <= tag && tag < VisitorSynchronization::kNumberOfSyncTags);
- HeapEntry* entry = AddEntry(
- HeapEntry::kSynthetic,
- VisitorSynchronization::kTagNames[tag],
- HeapObjectsMap::GetNthGcSubrootId(tag),
- 0,
- 0);
+ HeapEntry* entry = AddEntry(HeapEntry::kSynthetic,
+ VisitorSynchronization::kTagNames[tag], id, 0, 0);
gc_subroot_indexes_[tag] = entry->index();
return entry;
}
}
-HeapObject* const V8HeapExplorer::kInternalRootObject =
- reinterpret_cast<HeapObject*>(
- static_cast<intptr_t>(HeapObjectsMap::kInternalRootObjectId));
-HeapObject* const V8HeapExplorer::kGcRootsObject =
- reinterpret_cast<HeapObject*>(
- static_cast<intptr_t>(HeapObjectsMap::kGcRootsObjectId));
-HeapObject* const V8HeapExplorer::kFirstGcSubrootObject =
- reinterpret_cast<HeapObject*>(
- static_cast<intptr_t>(HeapObjectsMap::kGcRootsFirstSubrootId));
-HeapObject* const V8HeapExplorer::kLastGcSubrootObject =
- reinterpret_cast<HeapObject*>(
- static_cast<intptr_t>(HeapObjectsMap::kFirstAvailableObjectId));
-
-
V8HeapExplorer::V8HeapExplorer(
HeapSnapshot* snapshot,
SnapshottingProgressReportingInterface* progress,
HeapEntry* V8HeapExplorer::AddEntry(HeapObject* object) {
- if (object == kInternalRootObject) {
- snapshot_->AddRootEntry();
- return snapshot_->root();
- } else if (object == kGcRootsObject) {
- HeapEntry* entry = snapshot_->AddGcRootsEntry();
- return entry;
- } else if (object >= kFirstGcSubrootObject && object < kLastGcSubrootObject) {
- HeapEntry* entry = snapshot_->AddGcSubrootEntry(GetGcSubrootOrder(object));
- return entry;
- } else if (object->IsJSFunction()) {
+ if (object->IsJSFunction()) {
JSFunction* func = JSFunction::cast(object);
SharedFunctionInfo* shared = func->shared();
const char* name = shared->bound() ? "native_bind" :
};
-class GcSubrootsEnumerator : public ObjectVisitor {
- public:
- GcSubrootsEnumerator(
- SnapshotFiller* filler, V8HeapExplorer* explorer)
- : filler_(filler),
- explorer_(explorer),
- previous_object_count_(0),
- object_count_(0) {
- }
- void VisitPointers(Object** start, Object** end) {
- object_count_ += end - start;
- }
- void Synchronize(VisitorSynchronization::SyncTag tag) {
- // Skip empty subroots.
- if (previous_object_count_ != object_count_) {
- previous_object_count_ = object_count_;
- filler_->AddEntry(V8HeapExplorer::GetNthGcSubrootObject(tag), explorer_);
- }
- }
- private:
- SnapshotFiller* filler_;
- V8HeapExplorer* explorer_;
- intptr_t previous_object_count_;
- intptr_t object_count_;
-};
-
-
-void V8HeapExplorer::AddRootEntries(SnapshotFiller* filler) {
- filler->AddEntry(kInternalRootObject, this);
- filler->AddEntry(kGcRootsObject, this);
- GcSubrootsEnumerator enumerator(filler, this);
- heap_->IterateRoots(&enumerator, VISIT_ALL);
-}
-
-
const char* V8HeapExplorer::GetSystemEntryName(HeapObject* object) {
switch (object->map()->instance_type()) {
case MAP_TYPE:
ExtractSharedFunctionInfoReferences(entry, SharedFunctionInfo::cast(obj));
} else if (obj->IsScript()) {
ExtractScriptReferences(entry, Script::cast(obj));
+ } else if (obj->IsAccessorInfo()) {
+ ExtractAccessorInfoReferences(entry, AccessorInfo::cast(obj));
} else if (obj->IsAccessorPair()) {
ExtractAccessorPairReferences(entry, AccessorPair::cast(obj));
} else if (obj->IsCodeCache()) {
}
+void V8HeapExplorer::ExtractAccessorInfoReferences(
+ int entry, AccessorInfo* accessor_info) {
+ SetInternalReference(accessor_info, entry, "name", accessor_info->name(),
+ AccessorInfo::kNameOffset);
+ SetInternalReference(accessor_info, entry, "expected_receiver_type",
+ accessor_info->expected_receiver_type(),
+ AccessorInfo::kExpectedReceiverTypeOffset);
+ if (accessor_info->IsDeclaredAccessorInfo()) {
+ DeclaredAccessorInfo* declared_accessor_info =
+ DeclaredAccessorInfo::cast(accessor_info);
+ SetInternalReference(declared_accessor_info, entry, "descriptor",
+ declared_accessor_info->descriptor(),
+ DeclaredAccessorInfo::kDescriptorOffset);
+ } else if (accessor_info->IsExecutableAccessorInfo()) {
+ ExecutableAccessorInfo* executable_accessor_info =
+ ExecutableAccessorInfo::cast(accessor_info);
+ SetInternalReference(executable_accessor_info, entry, "getter",
+ executable_accessor_info->getter(),
+ ExecutableAccessorInfo::kGetterOffset);
+ SetInternalReference(executable_accessor_info, entry, "setter",
+ executable_accessor_info->setter(),
+ ExecutableAccessorInfo::kSetterOffset);
+ SetInternalReference(executable_accessor_info, entry, "data",
+ executable_accessor_info->data(),
+ ExecutableAccessorInfo::kDataOffset);
+ }
+}
+
+
void V8HeapExplorer::ExtractAccessorPairReferences(
int entry, AccessorPair* accessors) {
SetInternalReference(accessors, entry, "getter", accessors->getter(),
descs->GetKey(i), descs->GetValue(i));
break;
case NORMAL: // only in slow mode
- case HANDLER: // only in lookup results, not in descriptors
- case INTERCEPTOR: // only in lookup results, not in descriptors
- break;
- case NONEXISTENT:
UNREACHABLE();
break;
}
if (object->IsJSFunction()) return heap->closure_string();
String* constructor_name = object->constructor_name();
if (constructor_name == heap->Object_string()) {
- // Look up an immediate "constructor" property, if it is a function,
- // return its name. This is for instances of binding objects, which
- // have prototype constructor type "Object".
- Object* constructor_prop = NULL;
- Isolate* isolate = heap->isolate();
- LookupResult result(isolate);
- object->LookupOwnRealNamedProperty(
- isolate->factory()->constructor_string(), &result);
- if (!result.IsFound()) return object->constructor_name();
-
- constructor_prop = result.GetLazyValue();
- if (constructor_prop->IsJSFunction()) {
- Object* maybe_name =
- JSFunction::cast(constructor_prop)->shared()->name();
- if (maybe_name->IsString()) {
- String* name = String::cast(maybe_name);
- if (name->length() > 0) return name;
- }
- }
+ // TODO(verwaest): Try to get object.constructor.name in this case.
+ // This requires handlification of the V8HeapExplorer.
}
return object->constructor_name();
}
void FillReferences(V8HeapExplorer* explorer) {
DCHECK(strong_references_.length() <= all_references_.length());
Builtins* builtins = heap_->isolate()->builtins();
- for (int i = 0; i < reference_tags_.length(); ++i) {
- explorer->SetGcRootsReference(reference_tags_[i].tag);
- }
int strong_index = 0, all_index = 0, tags_index = 0, builtin_index = 0;
while (all_index < all_references_.length()) {
bool is_strong = strong_index < strong_references_.length()
SnapshotFiller* filler) {
filler_ = filler;
+ // Create references to the synthetic roots.
+ SetRootGcRootsReference();
+ for (int tag = 0; tag < VisitorSynchronization::kNumberOfSyncTags; tag++) {
+ SetGcRootsReference(static_cast<VisitorSynchronization::SyncTag>(tag));
+ }
+
// Make sure builtin code objects get their builtin tags
// first. Otherwise a particular JSFunction object could set
// its custom name to a generic builtin.
- SetRootGcRootsReference();
RootsReferencesExtractor extractor(heap_);
heap_->IterateRoots(&extractor, VISIT_ONLY_STRONG);
extractor.SetCollectingAllReferences();
#ifdef VERIFY_HEAP
Heap* debug_heap = heap_;
- CHECK(debug_heap->old_data_space()->swept_precisely());
- CHECK(debug_heap->old_pointer_space()->swept_precisely());
- CHECK(debug_heap->code_space()->swept_precisely());
- CHECK(debug_heap->cell_space()->swept_precisely());
- CHECK(debug_heap->property_cell_space()->swept_precisely());
- CHECK(debug_heap->map_space()->swept_precisely());
-#endif
-
-#ifdef VERIFY_HEAP
debug_heap->Verify();
#endif
debug_heap->Verify();
#endif
+ snapshot_->AddSyntheticRootEntries();
+
if (!FillReferences()) return false;
snapshot_->FillChildren();
bool HeapSnapshotGenerator::FillReferences() {
SnapshotFiller filler(snapshot_, &entries_);
- v8_heap_explorer_.AddRootEntries(&filler);
return v8_heap_explorer_.IterateAndExtractReferences(&filler)
&& dom_explorer_.IterateAndExtractReferences(&filler);
}
projects / platform / framework / web / crosswalk.git / blobdiff