V8 API Reference, 7.2.502.16 (for Deno 0.2.4)
heap-snapshot-generator-inl.h
1 // Copyright 2013 the V8 project authors. All rights reserved.
2 // Use of this source code is governed by a BSD-style license that can be
3 // found in the LICENSE file.
4 
5 #ifndef V8_PROFILER_HEAP_SNAPSHOT_GENERATOR_INL_H_
6 #define V8_PROFILER_HEAP_SNAPSHOT_GENERATOR_INL_H_
7 
8 #include "src/profiler/heap-snapshot-generator.h"
9 
10 #include "src/profiler/heap-profiler.h"
11 #include "src/string-hasher-inl.h"
12 
13 namespace v8 {
14 namespace internal {
15 
16 HeapEntry* HeapGraphEdge::from() const {
17  return &snapshot()->entries()[from_index()];
18 }
19 
20 Isolate* HeapGraphEdge::isolate() const { return to_entry_->isolate(); }
21 
22 HeapSnapshot* HeapGraphEdge::snapshot() const {
23  return to_entry_->snapshot();
24 }
25 
26 int HeapEntry::set_children_index(int index) {
27  // Note: children_count_ and children_end_index_ are parts of a union.
28  int next_index = index + children_count_;
29  children_end_index_ = index;
30  return next_index;
31 }
32 
33 void HeapEntry::add_child(HeapGraphEdge* edge) {
34  snapshot_->children()[children_end_index_++] = edge;
35 }
36 
37 HeapGraphEdge* HeapEntry::child(int i) { return children_begin()[i]; }
38 
39 std::vector<HeapGraphEdge*>::iterator HeapEntry::children_begin() const {
40  return index_ == 0 ? snapshot_->children().begin()
41  : snapshot_->entries()[index_ - 1].children_end();
42 }
43 
44 std::vector<HeapGraphEdge*>::iterator HeapEntry::children_end() const {
45  DCHECK_GE(children_end_index_, 0);
46  return snapshot_->children().begin() + children_end_index_;
47 }
48 
49 int HeapEntry::children_count() const {
50  return static_cast<int>(children_end() - children_begin());
51 }
52 
53 Isolate* HeapEntry::isolate() const { return snapshot_->profiler()->isolate(); }
54 
55 uint32_t HeapSnapshotJSONSerializer::StringHash(const void* string) {
56  const char* s = reinterpret_cast<const char*>(string);
57  int len = static_cast<int>(strlen(s));
58  return StringHasher::HashSequentialString(s, len,
59  v8::internal::kZeroHashSeed);
60 }
61 
62 int HeapSnapshotJSONSerializer::to_node_index(const HeapEntry* e) {
63  return to_node_index(e->index());
64 }
65 
66 int HeapSnapshotJSONSerializer::to_node_index(int entry_index) {
67  return entry_index * kNodeFieldsCount;
68 }
69 
70 } // namespace internal
71 } // namespace v8
72 
73 #endif // V8_PROFILER_HEAP_SNAPSHOT_GENERATOR_INL_H_
Definition: libplatform.h:13