98a0fe0f32
R=bmeurer@chromium.org Review URL: https://codereview.chromium.org/1285183010 Cr-Commit-Position: refs/heads/master@{#30263}
622 lines
20 KiB
C++
622 lines
20 KiB
C++
// Copyright 2013 the V8 project authors. All rights reserved.
|
|
// Use of this source code is governed by a BSD-style license that can be
|
|
// found in the LICENSE file.
|
|
|
|
#ifndef V8_HEAP_SNAPSHOT_GENERATOR_H_
|
|
#define V8_HEAP_SNAPSHOT_GENERATOR_H_
|
|
|
|
#include "include/v8-profiler.h"
|
|
#include "src/base/platform/time.h"
|
|
#include "src/objects.h"
|
|
#include "src/strings-storage.h"
|
|
|
|
namespace v8 {
|
|
namespace internal {
|
|
|
|
class AllocationTracker;
|
|
class AllocationTraceNode;
|
|
class HeapEntry;
|
|
class HeapIterator;
|
|
class HeapProfiler;
|
|
class HeapSnapshot;
|
|
class SnapshotFiller;
|
|
|
|
class HeapGraphEdge BASE_EMBEDDED {
|
|
public:
|
|
enum Type {
|
|
kContextVariable = v8::HeapGraphEdge::kContextVariable,
|
|
kElement = v8::HeapGraphEdge::kElement,
|
|
kProperty = v8::HeapGraphEdge::kProperty,
|
|
kInternal = v8::HeapGraphEdge::kInternal,
|
|
kHidden = v8::HeapGraphEdge::kHidden,
|
|
kShortcut = v8::HeapGraphEdge::kShortcut,
|
|
kWeak = v8::HeapGraphEdge::kWeak
|
|
};
|
|
|
|
HeapGraphEdge(Type type, const char* name, int from, int to);
|
|
HeapGraphEdge(Type type, int index, int from, int to);
|
|
void ReplaceToIndexWithEntry(HeapSnapshot* snapshot);
|
|
|
|
Type type() const { return TypeField::decode(bit_field_); }
|
|
int index() const {
|
|
DCHECK(type() == kElement || type() == kHidden);
|
|
return index_;
|
|
}
|
|
const char* name() const {
|
|
DCHECK(type() == kContextVariable || type() == kProperty ||
|
|
type() == kInternal || type() == kShortcut || type() == kWeak);
|
|
return name_;
|
|
}
|
|
INLINE(HeapEntry* from() const);
|
|
HeapEntry* to() const { return to_entry_; }
|
|
|
|
private:
|
|
INLINE(HeapSnapshot* snapshot() const);
|
|
int from_index() const { return FromIndexField::decode(bit_field_); }
|
|
|
|
class TypeField : public BitField<Type, 0, 3> {};
|
|
class FromIndexField : public BitField<int, 3, 29> {};
|
|
uint32_t bit_field_;
|
|
union {
|
|
// During entries population |to_index_| is used for storing the index,
|
|
// afterwards it is replaced with a pointer to the entry.
|
|
int to_index_;
|
|
HeapEntry* to_entry_;
|
|
};
|
|
union {
|
|
int index_;
|
|
const char* name_;
|
|
};
|
|
};
|
|
|
|
|
|
// HeapEntry instances represent an entity from the heap (or a special
|
|
// virtual node, e.g. root).
|
|
class HeapEntry BASE_EMBEDDED {
|
|
public:
|
|
enum Type {
|
|
kHidden = v8::HeapGraphNode::kHidden,
|
|
kArray = v8::HeapGraphNode::kArray,
|
|
kString = v8::HeapGraphNode::kString,
|
|
kObject = v8::HeapGraphNode::kObject,
|
|
kCode = v8::HeapGraphNode::kCode,
|
|
kClosure = v8::HeapGraphNode::kClosure,
|
|
kRegExp = v8::HeapGraphNode::kRegExp,
|
|
kHeapNumber = v8::HeapGraphNode::kHeapNumber,
|
|
kNative = v8::HeapGraphNode::kNative,
|
|
kSynthetic = v8::HeapGraphNode::kSynthetic,
|
|
kConsString = v8::HeapGraphNode::kConsString,
|
|
kSlicedString = v8::HeapGraphNode::kSlicedString,
|
|
kSymbol = v8::HeapGraphNode::kSymbol,
|
|
kSimdValue = v8::HeapGraphNode::kSimdValue
|
|
};
|
|
static const int kNoEntry;
|
|
|
|
HeapEntry() { }
|
|
HeapEntry(HeapSnapshot* snapshot,
|
|
Type type,
|
|
const char* name,
|
|
SnapshotObjectId id,
|
|
size_t self_size,
|
|
unsigned trace_node_id);
|
|
|
|
HeapSnapshot* snapshot() { return snapshot_; }
|
|
Type type() { return static_cast<Type>(type_); }
|
|
const char* name() { return name_; }
|
|
void set_name(const char* name) { name_ = name; }
|
|
SnapshotObjectId id() { return id_; }
|
|
size_t self_size() { return self_size_; }
|
|
unsigned trace_node_id() const { return trace_node_id_; }
|
|
INLINE(int index() const);
|
|
int children_count() const { return children_count_; }
|
|
INLINE(int set_children_index(int index));
|
|
void add_child(HeapGraphEdge* edge) {
|
|
children_arr()[children_count_++] = edge;
|
|
}
|
|
Vector<HeapGraphEdge*> children() {
|
|
return Vector<HeapGraphEdge*>(children_arr(), children_count_); }
|
|
|
|
void SetIndexedReference(
|
|
HeapGraphEdge::Type type, int index, HeapEntry* entry);
|
|
void SetNamedReference(
|
|
HeapGraphEdge::Type type, const char* name, HeapEntry* entry);
|
|
|
|
void Print(
|
|
const char* prefix, const char* edge_name, int max_depth, int indent);
|
|
|
|
private:
|
|
INLINE(HeapGraphEdge** children_arr());
|
|
const char* TypeAsString();
|
|
|
|
unsigned type_: 4;
|
|
int children_count_: 28;
|
|
int children_index_;
|
|
size_t self_size_;
|
|
HeapSnapshot* snapshot_;
|
|
const char* name_;
|
|
SnapshotObjectId id_;
|
|
// id of allocation stack trace top node
|
|
unsigned trace_node_id_;
|
|
};
|
|
|
|
|
|
// HeapSnapshot represents a single heap snapshot. It is stored in
|
|
// HeapProfiler, which is also a factory for
|
|
// HeapSnapshots. All HeapSnapshots share strings copied from JS heap
|
|
// to be able to return them even if they were collected.
|
|
// HeapSnapshotGenerator fills in a HeapSnapshot.
|
|
class HeapSnapshot {
|
|
public:
|
|
explicit HeapSnapshot(HeapProfiler* profiler);
|
|
void Delete();
|
|
|
|
HeapProfiler* profiler() { return profiler_; }
|
|
size_t RawSnapshotSize() const;
|
|
HeapEntry* root() { return &entries_[root_index_]; }
|
|
HeapEntry* gc_roots() { return &entries_[gc_roots_index_]; }
|
|
HeapEntry* gc_subroot(int index) {
|
|
return &entries_[gc_subroot_indexes_[index]];
|
|
}
|
|
List<HeapEntry>& entries() { return entries_; }
|
|
List<HeapGraphEdge>& edges() { return edges_; }
|
|
List<HeapGraphEdge*>& children() { return children_; }
|
|
void RememberLastJSObjectId();
|
|
SnapshotObjectId max_snapshot_js_object_id() const {
|
|
return max_snapshot_js_object_id_;
|
|
}
|
|
|
|
HeapEntry* AddEntry(HeapEntry::Type type,
|
|
const char* name,
|
|
SnapshotObjectId id,
|
|
size_t size,
|
|
unsigned trace_node_id);
|
|
void AddSyntheticRootEntries();
|
|
HeapEntry* GetEntryById(SnapshotObjectId id);
|
|
List<HeapEntry*>* GetSortedEntriesList();
|
|
void FillChildren();
|
|
|
|
void Print(int max_depth);
|
|
|
|
private:
|
|
HeapEntry* AddRootEntry();
|
|
HeapEntry* AddGcRootsEntry();
|
|
HeapEntry* AddGcSubrootEntry(int tag, SnapshotObjectId id);
|
|
|
|
HeapProfiler* profiler_;
|
|
int root_index_;
|
|
int gc_roots_index_;
|
|
int gc_subroot_indexes_[VisitorSynchronization::kNumberOfSyncTags];
|
|
List<HeapEntry> entries_;
|
|
List<HeapGraphEdge> edges_;
|
|
List<HeapGraphEdge*> children_;
|
|
List<HeapEntry*> sorted_entries_;
|
|
SnapshotObjectId max_snapshot_js_object_id_;
|
|
|
|
friend class HeapSnapshotTester;
|
|
|
|
DISALLOW_COPY_AND_ASSIGN(HeapSnapshot);
|
|
};
|
|
|
|
|
|
class HeapObjectsMap {
|
|
public:
|
|
struct TimeInterval {
|
|
explicit TimeInterval(SnapshotObjectId id)
|
|
: id(id), size(0), count(0), timestamp(base::TimeTicks::Now()) {}
|
|
SnapshotObjectId last_assigned_id() const { return id - kObjectIdStep; }
|
|
SnapshotObjectId id;
|
|
uint32_t size;
|
|
uint32_t count;
|
|
base::TimeTicks timestamp;
|
|
};
|
|
|
|
explicit HeapObjectsMap(Heap* heap);
|
|
|
|
Heap* heap() const { return heap_; }
|
|
|
|
SnapshotObjectId FindEntry(Address addr);
|
|
SnapshotObjectId FindOrAddEntry(Address addr,
|
|
unsigned int size,
|
|
bool accessed = true);
|
|
bool MoveObject(Address from, Address to, int size);
|
|
void UpdateObjectSize(Address addr, int size);
|
|
SnapshotObjectId last_assigned_id() const {
|
|
return next_id_ - kObjectIdStep;
|
|
}
|
|
|
|
void StopHeapObjectsTracking();
|
|
SnapshotObjectId PushHeapObjectsStats(OutputStream* stream,
|
|
int64_t* timestamp_us);
|
|
const List<TimeInterval>& samples() const { return time_intervals_; }
|
|
size_t GetUsedMemorySize() const;
|
|
|
|
SnapshotObjectId GenerateId(v8::RetainedObjectInfo* info);
|
|
|
|
static const int kObjectIdStep = 2;
|
|
static const SnapshotObjectId kInternalRootObjectId;
|
|
static const SnapshotObjectId kGcRootsObjectId;
|
|
static const SnapshotObjectId kGcRootsFirstSubrootId;
|
|
static const SnapshotObjectId kFirstAvailableObjectId;
|
|
|
|
int FindUntrackedObjects();
|
|
|
|
void UpdateHeapObjectsMap();
|
|
void RemoveDeadEntries();
|
|
|
|
private:
|
|
struct EntryInfo {
|
|
EntryInfo(SnapshotObjectId id, Address addr, unsigned int size)
|
|
: id(id), addr(addr), size(size), accessed(true) { }
|
|
EntryInfo(SnapshotObjectId id, Address addr, unsigned int size, bool accessed)
|
|
: id(id), addr(addr), size(size), accessed(accessed) { }
|
|
SnapshotObjectId id;
|
|
Address addr;
|
|
unsigned int size;
|
|
bool accessed;
|
|
};
|
|
|
|
SnapshotObjectId next_id_;
|
|
HashMap entries_map_;
|
|
List<EntryInfo> entries_;
|
|
List<TimeInterval> time_intervals_;
|
|
Heap* heap_;
|
|
|
|
DISALLOW_COPY_AND_ASSIGN(HeapObjectsMap);
|
|
};
|
|
|
|
|
|
// A typedef for referencing anything that can be snapshotted living
|
|
// in any kind of heap memory.
|
|
typedef void* HeapThing;
|
|
|
|
|
|
// An interface that creates HeapEntries by HeapThings.
|
|
class HeapEntriesAllocator {
|
|
public:
|
|
virtual ~HeapEntriesAllocator() { }
|
|
virtual HeapEntry* AllocateEntry(HeapThing ptr) = 0;
|
|
};
|
|
|
|
|
|
// The HeapEntriesMap instance is used to track a mapping between
|
|
// real heap objects and their representations in heap snapshots.
|
|
class HeapEntriesMap {
|
|
public:
|
|
HeapEntriesMap();
|
|
|
|
int Map(HeapThing thing);
|
|
void Pair(HeapThing thing, int entry);
|
|
|
|
private:
|
|
static uint32_t Hash(HeapThing thing) {
|
|
return ComputeIntegerHash(
|
|
static_cast<uint32_t>(reinterpret_cast<uintptr_t>(thing)),
|
|
v8::internal::kZeroHashSeed);
|
|
}
|
|
|
|
HashMap entries_;
|
|
|
|
friend class HeapObjectsSet;
|
|
|
|
DISALLOW_COPY_AND_ASSIGN(HeapEntriesMap);
|
|
};
|
|
|
|
|
|
class HeapObjectsSet {
|
|
public:
|
|
HeapObjectsSet();
|
|
void Clear();
|
|
bool Contains(Object* object);
|
|
void Insert(Object* obj);
|
|
const char* GetTag(Object* obj);
|
|
void SetTag(Object* obj, const char* tag);
|
|
bool is_empty() const { return entries_.occupancy() == 0; }
|
|
|
|
private:
|
|
HashMap entries_;
|
|
|
|
DISALLOW_COPY_AND_ASSIGN(HeapObjectsSet);
|
|
};
|
|
|
|
|
|
class SnapshottingProgressReportingInterface {
|
|
public:
|
|
virtual ~SnapshottingProgressReportingInterface() { }
|
|
virtual void ProgressStep() = 0;
|
|
virtual bool ProgressReport(bool force) = 0;
|
|
};
|
|
|
|
|
|
// An implementation of V8 heap graph extractor.
|
|
class V8HeapExplorer : public HeapEntriesAllocator {
|
|
public:
|
|
V8HeapExplorer(HeapSnapshot* snapshot,
|
|
SnapshottingProgressReportingInterface* progress,
|
|
v8::HeapProfiler::ObjectNameResolver* resolver);
|
|
virtual ~V8HeapExplorer();
|
|
virtual HeapEntry* AllocateEntry(HeapThing ptr);
|
|
int EstimateObjectsCount(HeapIterator* iterator);
|
|
bool IterateAndExtractReferences(SnapshotFiller* filler);
|
|
void TagGlobalObjects();
|
|
void TagCodeObject(Code* code);
|
|
void TagBuiltinCodeObject(Code* code, const char* name);
|
|
HeapEntry* AddEntry(Address address,
|
|
HeapEntry::Type type,
|
|
const char* name,
|
|
size_t size);
|
|
|
|
static String* GetConstructorName(JSObject* object);
|
|
|
|
private:
|
|
typedef bool (V8HeapExplorer::*ExtractReferencesMethod)(int entry,
|
|
HeapObject* object);
|
|
|
|
HeapEntry* AddEntry(HeapObject* object);
|
|
HeapEntry* AddEntry(HeapObject* object,
|
|
HeapEntry::Type type,
|
|
const char* name);
|
|
|
|
const char* GetSystemEntryName(HeapObject* object);
|
|
|
|
template<V8HeapExplorer::ExtractReferencesMethod extractor>
|
|
bool IterateAndExtractSinglePass();
|
|
|
|
bool ExtractReferencesPass1(int entry, HeapObject* obj);
|
|
bool ExtractReferencesPass2(int entry, HeapObject* obj);
|
|
void ExtractJSGlobalProxyReferences(int entry, JSGlobalProxy* proxy);
|
|
void ExtractJSObjectReferences(int entry, JSObject* js_obj);
|
|
void ExtractStringReferences(int entry, String* obj);
|
|
void ExtractSymbolReferences(int entry, Symbol* symbol);
|
|
void ExtractJSCollectionReferences(int entry, JSCollection* collection);
|
|
void ExtractJSWeakCollectionReferences(int entry,
|
|
JSWeakCollection* collection);
|
|
void ExtractContextReferences(int entry, Context* context);
|
|
void ExtractMapReferences(int entry, Map* map);
|
|
void ExtractSharedFunctionInfoReferences(int entry,
|
|
SharedFunctionInfo* shared);
|
|
void ExtractScriptReferences(int entry, Script* script);
|
|
void ExtractAccessorInfoReferences(int entry, AccessorInfo* accessor_info);
|
|
void ExtractAccessorPairReferences(int entry, AccessorPair* accessors);
|
|
void ExtractCodeCacheReferences(int entry, CodeCache* code_cache);
|
|
void ExtractCodeReferences(int entry, Code* code);
|
|
void ExtractBoxReferences(int entry, Box* box);
|
|
void ExtractCellReferences(int entry, Cell* cell);
|
|
void ExtractPropertyCellReferences(int entry, PropertyCell* cell);
|
|
void ExtractAllocationSiteReferences(int entry, AllocationSite* site);
|
|
void ExtractJSArrayBufferReferences(int entry, JSArrayBuffer* buffer);
|
|
void ExtractFixedArrayReferences(int entry, FixedArray* array);
|
|
void ExtractClosureReferences(JSObject* js_obj, int entry);
|
|
void ExtractPropertyReferences(JSObject* js_obj, int entry);
|
|
void ExtractAccessorPairProperty(JSObject* js_obj, int entry, Name* key,
|
|
Object* callback_obj, int field_offset = -1);
|
|
void ExtractElementReferences(JSObject* js_obj, int entry);
|
|
void ExtractInternalReferences(JSObject* js_obj, int entry);
|
|
|
|
bool IsEssentialObject(Object* object);
|
|
void SetContextReference(HeapObject* parent_obj,
|
|
int parent,
|
|
String* reference_name,
|
|
Object* child,
|
|
int field_offset);
|
|
void SetNativeBindReference(HeapObject* parent_obj,
|
|
int parent,
|
|
const char* reference_name,
|
|
Object* child);
|
|
void SetElementReference(HeapObject* parent_obj,
|
|
int parent,
|
|
int index,
|
|
Object* child);
|
|
void SetInternalReference(HeapObject* parent_obj,
|
|
int parent,
|
|
const char* reference_name,
|
|
Object* child,
|
|
int field_offset = -1);
|
|
void SetInternalReference(HeapObject* parent_obj,
|
|
int parent,
|
|
int index,
|
|
Object* child,
|
|
int field_offset = -1);
|
|
void SetHiddenReference(HeapObject* parent_obj,
|
|
int parent,
|
|
int index,
|
|
Object* child);
|
|
void SetWeakReference(HeapObject* parent_obj,
|
|
int parent,
|
|
const char* reference_name,
|
|
Object* child_obj,
|
|
int field_offset);
|
|
void SetWeakReference(HeapObject* parent_obj,
|
|
int parent,
|
|
int index,
|
|
Object* child_obj,
|
|
int field_offset);
|
|
void SetPropertyReference(HeapObject* parent_obj,
|
|
int parent,
|
|
Name* reference_name,
|
|
Object* child,
|
|
const char* name_format_string = NULL,
|
|
int field_offset = -1);
|
|
void SetDataOrAccessorPropertyReference(PropertyKind kind,
|
|
JSObject* parent_obj, int parent,
|
|
Name* reference_name, Object* child,
|
|
const char* name_format_string = NULL,
|
|
int field_offset = -1);
|
|
|
|
void SetUserGlobalReference(Object* user_global);
|
|
void SetRootGcRootsReference();
|
|
void SetGcRootsReference(VisitorSynchronization::SyncTag tag);
|
|
void SetGcSubrootReference(
|
|
VisitorSynchronization::SyncTag tag, bool is_weak, Object* child);
|
|
const char* GetStrongGcSubrootName(Object* object);
|
|
void TagObject(Object* obj, const char* tag);
|
|
void MarkAsWeakContainer(Object* object);
|
|
|
|
HeapEntry* GetEntry(Object* obj);
|
|
|
|
Heap* heap_;
|
|
HeapSnapshot* snapshot_;
|
|
StringsStorage* names_;
|
|
HeapObjectsMap* heap_object_map_;
|
|
SnapshottingProgressReportingInterface* progress_;
|
|
SnapshotFiller* filler_;
|
|
HeapObjectsSet objects_tags_;
|
|
HeapObjectsSet strong_gc_subroot_names_;
|
|
HeapObjectsSet user_roots_;
|
|
HeapObjectsSet weak_containers_;
|
|
v8::HeapProfiler::ObjectNameResolver* global_object_name_resolver_;
|
|
|
|
friend class IndexedReferencesExtractor;
|
|
friend class RootsReferencesExtractor;
|
|
|
|
DISALLOW_COPY_AND_ASSIGN(V8HeapExplorer);
|
|
};
|
|
|
|
|
|
class NativeGroupRetainedObjectInfo;
|
|
|
|
|
|
// An implementation of retained native objects extractor.
|
|
class NativeObjectsExplorer {
|
|
public:
|
|
NativeObjectsExplorer(HeapSnapshot* snapshot,
|
|
SnapshottingProgressReportingInterface* progress);
|
|
virtual ~NativeObjectsExplorer();
|
|
int EstimateObjectsCount();
|
|
bool IterateAndExtractReferences(SnapshotFiller* filler);
|
|
|
|
private:
|
|
void FillRetainedObjects();
|
|
void FillImplicitReferences();
|
|
List<HeapObject*>* GetListMaybeDisposeInfo(v8::RetainedObjectInfo* info);
|
|
void SetNativeRootReference(v8::RetainedObjectInfo* info);
|
|
void SetRootNativeRootsReference();
|
|
void SetWrapperNativeReferences(HeapObject* wrapper,
|
|
v8::RetainedObjectInfo* info);
|
|
void VisitSubtreeWrapper(Object** p, uint16_t class_id);
|
|
|
|
static uint32_t InfoHash(v8::RetainedObjectInfo* info) {
|
|
return ComputeIntegerHash(static_cast<uint32_t>(info->GetHash()),
|
|
v8::internal::kZeroHashSeed);
|
|
}
|
|
static bool RetainedInfosMatch(void* key1, void* key2) {
|
|
return key1 == key2 ||
|
|
(reinterpret_cast<v8::RetainedObjectInfo*>(key1))->IsEquivalent(
|
|
reinterpret_cast<v8::RetainedObjectInfo*>(key2));
|
|
}
|
|
INLINE(static bool StringsMatch(void* key1, void* key2)) {
|
|
return strcmp(reinterpret_cast<char*>(key1),
|
|
reinterpret_cast<char*>(key2)) == 0;
|
|
}
|
|
|
|
NativeGroupRetainedObjectInfo* FindOrAddGroupInfo(const char* label);
|
|
|
|
Isolate* isolate_;
|
|
HeapSnapshot* snapshot_;
|
|
StringsStorage* names_;
|
|
bool embedder_queried_;
|
|
HeapObjectsSet in_groups_;
|
|
// RetainedObjectInfo* -> List<HeapObject*>*
|
|
HashMap objects_by_info_;
|
|
HashMap native_groups_;
|
|
HeapEntriesAllocator* synthetic_entries_allocator_;
|
|
HeapEntriesAllocator* native_entries_allocator_;
|
|
// Used during references extraction.
|
|
SnapshotFiller* filler_;
|
|
|
|
static HeapThing const kNativesRootObject;
|
|
|
|
friend class GlobalHandlesExtractor;
|
|
|
|
DISALLOW_COPY_AND_ASSIGN(NativeObjectsExplorer);
|
|
};
|
|
|
|
|
|
class HeapSnapshotGenerator : public SnapshottingProgressReportingInterface {
|
|
public:
|
|
HeapSnapshotGenerator(HeapSnapshot* snapshot,
|
|
v8::ActivityControl* control,
|
|
v8::HeapProfiler::ObjectNameResolver* resolver,
|
|
Heap* heap);
|
|
bool GenerateSnapshot();
|
|
|
|
private:
|
|
bool FillReferences();
|
|
void ProgressStep();
|
|
bool ProgressReport(bool force = false);
|
|
void SetProgressTotal(int iterations_count);
|
|
|
|
HeapSnapshot* snapshot_;
|
|
v8::ActivityControl* control_;
|
|
V8HeapExplorer v8_heap_explorer_;
|
|
NativeObjectsExplorer dom_explorer_;
|
|
// Mapping from HeapThing pointers to HeapEntry* pointers.
|
|
HeapEntriesMap entries_;
|
|
// Used during snapshot generation.
|
|
int progress_counter_;
|
|
int progress_total_;
|
|
Heap* heap_;
|
|
|
|
DISALLOW_COPY_AND_ASSIGN(HeapSnapshotGenerator);
|
|
};
|
|
|
|
class OutputStreamWriter;
|
|
|
|
class HeapSnapshotJSONSerializer {
|
|
public:
|
|
explicit HeapSnapshotJSONSerializer(HeapSnapshot* snapshot)
|
|
: snapshot_(snapshot),
|
|
strings_(StringsMatch),
|
|
next_node_id_(1),
|
|
next_string_id_(1),
|
|
writer_(NULL) {
|
|
}
|
|
void Serialize(v8::OutputStream* stream);
|
|
|
|
private:
|
|
INLINE(static bool StringsMatch(void* key1, void* key2)) {
|
|
return strcmp(reinterpret_cast<char*>(key1),
|
|
reinterpret_cast<char*>(key2)) == 0;
|
|
}
|
|
|
|
INLINE(static uint32_t StringHash(const void* string)) {
|
|
const char* s = reinterpret_cast<const char*>(string);
|
|
int len = static_cast<int>(strlen(s));
|
|
return StringHasher::HashSequentialString(
|
|
s, len, v8::internal::kZeroHashSeed);
|
|
}
|
|
|
|
int GetStringId(const char* s);
|
|
int entry_index(HeapEntry* e) { return e->index() * kNodeFieldsCount; }
|
|
void SerializeEdge(HeapGraphEdge* edge, bool first_edge);
|
|
void SerializeEdges();
|
|
void SerializeImpl();
|
|
void SerializeNode(HeapEntry* entry);
|
|
void SerializeNodes();
|
|
void SerializeSnapshot();
|
|
void SerializeTraceTree();
|
|
void SerializeTraceNode(AllocationTraceNode* node);
|
|
void SerializeTraceNodeInfos();
|
|
void SerializeSamples();
|
|
void SerializeString(const unsigned char* s);
|
|
void SerializeStrings();
|
|
|
|
static const int kEdgeFieldsCount;
|
|
static const int kNodeFieldsCount;
|
|
|
|
HeapSnapshot* snapshot_;
|
|
HashMap strings_;
|
|
int next_node_id_;
|
|
int next_string_id_;
|
|
OutputStreamWriter* writer_;
|
|
|
|
friend class HeapSnapshotJSONSerializerEnumerator;
|
|
friend class HeapSnapshotJSONSerializerIterator;
|
|
|
|
DISALLOW_COPY_AND_ASSIGN(HeapSnapshotJSONSerializer);
|
|
};
|
|
|
|
|
|
} } // namespace v8::internal
|
|
|
|
#endif // V8_HEAP_SNAPSHOT_GENERATOR_H_
|