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deps: cherry-pick 555c811 from upstream V8
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Original commit message:

    [api] Switch from `SetBuildEmbedderGraphCallback` to `AddBuildEmbedderGraphCallback`

    `SetBuildEmbedderGraphCallback`, unlike `SetWrapperClassInfoProvider`,
    assumes a monolithic embedder that can provide all necessary information.
    That is not the case for e.g. Node.js, which can e.g. provide multiple Node.js
    instances per V8 Isolate, as well as native addons that may allocate resources
    on their own.

    Cq-Include-Trybots: luci.chromium.try:linux_chromium_rel_ng
    Change-Id: Ib53dfde82416dd69934b08623e27d674a483ac2d
    Reviewed-on: https://chromium-review.googlesource.com/1082441
    Commit-Queue: Ulan Degenbaev <ulan@chromium.org>
    Reviewed-by: Ulan Degenbaev <ulan@chromium.org>
    Reviewed-by: Yang Guo <yangguo@chromium.org>
    Cr-Commit-Position: refs/heads/master@{#53545}

Refs: v8/v8@555c811

PR-URL: #21741
Reviewed-By: James M Snell <jasnell@gmail.com>
Reviewed-By: Joyee Cheung <joyeec9h3@gmail.com>
Reviewed-By: Refael Ackermann <refack@gmail.com>
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@addaleax @targos
addaleax authored and targos committed Jul 16, 2018
1 parent d42dbde commit 355c5e3
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Showing 6 changed files with 152 additions and 31 deletions.
2 changes: 1 addition & 1 deletion common.gypi
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Original file line number Diff line number Diff line change
Expand Up @@ -28,7 +28,7 @@

# Reset this number to 0 on major V8 upgrades.
# Increment by one for each non-official patch applied to deps/v8.
'v8_embedder_string': '-node.14',
'v8_embedder_string': '-node.15',

# Enable disassembler for `--print-code` v8 options
'v8_enable_disassembler': 1,
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22 changes: 17 additions & 5 deletions deps/v8/include/v8-profiler.h
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Original file line number Diff line number Diff line change
Expand Up @@ -636,7 +636,7 @@ class V8_EXPORT AllocationProfile {
* Usage:
* 1) Define derived class of EmbedderGraph::Node for embedder objects.
* 2) Set the build embedder graph callback on the heap profiler using
* HeapProfiler::SetBuildEmbedderGraphCallback.
* HeapProfiler::AddBuildEmbedderGraphCallback.
* 3) In the callback use graph->AddEdge(node1, node2) to add an edge from
* node1 to node2.
* 4) To represent references from/to V8 object, construct V8 nodes using
Expand Down Expand Up @@ -736,7 +736,12 @@ class V8_EXPORT HeapProfiler {
* The callback must not trigger garbage collection in V8.
*/
typedef void (*BuildEmbedderGraphCallback)(v8::Isolate* isolate,
v8::EmbedderGraph* graph);
v8::EmbedderGraph* graph,
void* data);

/** TODO(addaleax): Remove */
typedef void (*LegacyBuildEmbedderGraphCallback)(v8::Isolate* isolate,
v8::EmbedderGraph* graph);

/** Returns the number of snapshots taken. */
int GetSnapshotCount();
Expand Down Expand Up @@ -878,15 +883,22 @@ class V8_EXPORT HeapProfiler {

/** Binds a callback to embedder's class ID. */
V8_DEPRECATED(
"Use SetBuildEmbedderGraphCallback to provide info about embedder nodes",
"Use AddBuildEmbedderGraphCallback to provide info about embedder nodes",
void SetWrapperClassInfoProvider(uint16_t class_id,
WrapperInfoCallback callback));

V8_DEPRECATED(
"Use SetBuildEmbedderGraphCallback to provide info about embedder nodes",
"Use AddBuildEmbedderGraphCallback to provide info about embedder nodes",
void SetGetRetainerInfosCallback(GetRetainerInfosCallback callback));

void SetBuildEmbedderGraphCallback(BuildEmbedderGraphCallback callback);
V8_DEPRECATE_SOON(
"Use AddBuildEmbedderGraphCallback to provide info about embedder nodes",
void SetBuildEmbedderGraphCallback(
LegacyBuildEmbedderGraphCallback callback));
void AddBuildEmbedderGraphCallback(BuildEmbedderGraphCallback callback,
void* data);
void RemoveBuildEmbedderGraphCallback(BuildEmbedderGraphCallback callback,
void* data);

/**
* Default value of persistent handle class ID. Must not be used to
Expand Down
22 changes: 19 additions & 3 deletions deps/v8/src/api.cc
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Original file line number Diff line number Diff line change
Expand Up @@ -10558,9 +10558,25 @@ void HeapProfiler::SetGetRetainerInfosCallback(
}

void HeapProfiler::SetBuildEmbedderGraphCallback(
BuildEmbedderGraphCallback callback) {
reinterpret_cast<i::HeapProfiler*>(this)->SetBuildEmbedderGraphCallback(
callback);
LegacyBuildEmbedderGraphCallback callback) {
reinterpret_cast<i::HeapProfiler*>(this)->AddBuildEmbedderGraphCallback(
[](v8::Isolate* isolate, v8::EmbedderGraph* graph, void* data) {
reinterpret_cast<LegacyBuildEmbedderGraphCallback>(data)(isolate,
graph);
},
reinterpret_cast<void*>(callback));
}

void HeapProfiler::AddBuildEmbedderGraphCallback(
BuildEmbedderGraphCallback callback, void* data) {
reinterpret_cast<i::HeapProfiler*>(this)->AddBuildEmbedderGraphCallback(
callback, data);
}

void HeapProfiler::RemoveBuildEmbedderGraphCallback(
BuildEmbedderGraphCallback callback, void* data) {
reinterpret_cast<i::HeapProfiler*>(this)->RemoveBuildEmbedderGraphCallback(
callback, data);
}

v8::Testing::StressType internal::Testing::stress_type_ =
Expand Down
21 changes: 15 additions & 6 deletions deps/v8/src/profiler/heap-profiler.cc
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Original file line number Diff line number Diff line change
Expand Up @@ -69,16 +69,25 @@ v8::HeapProfiler::RetainerInfos HeapProfiler::GetRetainerInfos(
return infos;
}

void HeapProfiler::SetBuildEmbedderGraphCallback(
v8::HeapProfiler::BuildEmbedderGraphCallback callback) {
build_embedder_graph_callback_ = callback;
void HeapProfiler::AddBuildEmbedderGraphCallback(
v8::HeapProfiler::BuildEmbedderGraphCallback callback, void* data) {
build_embedder_graph_callbacks_.push_back({callback, data});
}

void HeapProfiler::RemoveBuildEmbedderGraphCallback(
v8::HeapProfiler::BuildEmbedderGraphCallback callback, void* data) {
auto it = std::find(build_embedder_graph_callbacks_.begin(),
build_embedder_graph_callbacks_.end(),
std::make_pair(callback, data));
if (it != build_embedder_graph_callbacks_.end())
build_embedder_graph_callbacks_.erase(it);
}

void HeapProfiler::BuildEmbedderGraph(Isolate* isolate,
v8::EmbedderGraph* graph) {
if (build_embedder_graph_callback_ != nullptr)
build_embedder_graph_callback_(reinterpret_cast<v8::Isolate*>(isolate),
graph);
for (const auto& cb : build_embedder_graph_callbacks_) {
cb.first(reinterpret_cast<v8::Isolate*>(isolate), graph, cb.second);
}
}

HeapSnapshot* HeapProfiler::TakeSnapshot(
Expand Down
12 changes: 7 additions & 5 deletions deps/v8/src/profiler/heap-profiler.h
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Original file line number Diff line number Diff line change
Expand Up @@ -71,11 +71,13 @@ class HeapProfiler : public HeapObjectAllocationTracker {
v8::HeapProfiler::GetRetainerInfosCallback callback);
v8::HeapProfiler::RetainerInfos GetRetainerInfos(Isolate* isolate);

void SetBuildEmbedderGraphCallback(
v8::HeapProfiler::BuildEmbedderGraphCallback callback);
void AddBuildEmbedderGraphCallback(
v8::HeapProfiler::BuildEmbedderGraphCallback callback, void* data);
void RemoveBuildEmbedderGraphCallback(
v8::HeapProfiler::BuildEmbedderGraphCallback callback, void* data);
void BuildEmbedderGraph(Isolate* isolate, v8::EmbedderGraph* graph);
bool HasBuildEmbedderGraphCallback() {
return build_embedder_graph_callback_ != nullptr;
return !build_embedder_graph_callbacks_.empty();
}

bool is_tracking_object_moves() const { return is_tracking_object_moves_; }
Expand Down Expand Up @@ -103,8 +105,8 @@ class HeapProfiler : public HeapObjectAllocationTracker {
std::unique_ptr<SamplingHeapProfiler> sampling_heap_profiler_;
v8::HeapProfiler::GetRetainerInfosCallback get_retainer_infos_callback_ =
nullptr;
v8::HeapProfiler::BuildEmbedderGraphCallback build_embedder_graph_callback_ =
nullptr;
std::vector<std::pair<v8::HeapProfiler::BuildEmbedderGraphCallback, void*>>
build_embedder_graph_callbacks_;

DISALLOW_COPY_AND_ASSIGN(HeapProfiler);
};
Expand Down
104 changes: 93 additions & 11 deletions deps/v8/test/cctest/test-heap-profiler.cc
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Original file line number Diff line number Diff line change
Expand Up @@ -1541,8 +1541,8 @@ class EmbedderGraphBuilder : public v8::PersistentHandleVisitor {
graph->AddNode(std::unique_ptr<Group>(new Group("ccc-group")));
}

static void BuildEmbedderGraph(v8::Isolate* isolate,
v8::EmbedderGraph* graph) {
static void BuildEmbedderGraph(v8::Isolate* isolate, v8::EmbedderGraph* graph,
void* data) {
EmbedderGraphBuilder builder(isolate, graph);
isolate->VisitHandlesWithClassIds(&builder);
}
Expand Down Expand Up @@ -1604,8 +1604,8 @@ TEST(HeapSnapshotRetainedObjectInfo) {
v8::HandleScope scope(isolate);
v8::HeapProfiler* heap_profiler = isolate->GetHeapProfiler();

heap_profiler->SetBuildEmbedderGraphCallback(
EmbedderGraphBuilder::BuildEmbedderGraph);
heap_profiler->AddBuildEmbedderGraphCallback(
EmbedderGraphBuilder::BuildEmbedderGraph, nullptr);
v8::Persistent<v8::String> p_AAA(isolate, v8_str("AAA"));
p_AAA.SetWrapperClassId(1);
v8::Persistent<v8::String> p_BBB(isolate, v8_str("BBB"));
Expand Down Expand Up @@ -2932,7 +2932,8 @@ class EmbedderRootNode : public EmbedderNode {
// global object.
v8::Local<v8::Value>* global_object_pointer;

void BuildEmbedderGraph(v8::Isolate* v8_isolate, v8::EmbedderGraph* graph) {
void BuildEmbedderGraph(v8::Isolate* v8_isolate, v8::EmbedderGraph* graph,
void* data) {
using Node = v8::EmbedderGraph::Node;
Node* global_node = graph->V8Node(*global_object_pointer);
Node* embedder_node_A = graph->AddNode(
Expand Down Expand Up @@ -2979,12 +2980,92 @@ TEST(EmbedderGraph) {
(isolate->context()->native_context()->global_object())));
global_object_pointer = &global_object;
v8::HeapProfiler* heap_profiler = env->GetIsolate()->GetHeapProfiler();
heap_profiler->SetBuildEmbedderGraphCallback(BuildEmbedderGraph);
heap_profiler->AddBuildEmbedderGraphCallback(BuildEmbedderGraph, nullptr);
const v8::HeapSnapshot* snapshot = heap_profiler->TakeHeapSnapshot();
CHECK(ValidateSnapshot(snapshot));
CheckEmbedderGraphSnapshot(env->GetIsolate(), snapshot);
}

struct GraphBuildingContext {
int counter = 0;
};

void CheckEmbedderGraphSnapshotWithContext(
v8::Isolate* isolate, const v8::HeapSnapshot* snapshot,
const GraphBuildingContext* context) {
const v8::HeapGraphNode* global = GetGlobalObject(snapshot);
CHECK_GE(context->counter, 1);
CHECK_LE(context->counter, 2);

const v8::HeapGraphNode* embedder_node_A =
GetChildByName(global, "EmbedderNodeA");
CHECK_EQ(10, GetSize(embedder_node_A));

const v8::HeapGraphNode* embedder_node_B =
GetChildByName(global, "EmbedderNodeB");
if (context->counter == 2) {
CHECK_NOT_NULL(embedder_node_B);
CHECK_EQ(20, GetSize(embedder_node_B));
} else {
CHECK_NULL(embedder_node_B);
}
}

void BuildEmbedderGraphWithContext(v8::Isolate* v8_isolate,
v8::EmbedderGraph* graph, void* data) {
using Node = v8::EmbedderGraph::Node;
GraphBuildingContext* context = static_cast<GraphBuildingContext*>(data);
Node* global_node = graph->V8Node(*global_object_pointer);

CHECK_GE(context->counter, 0);
CHECK_LE(context->counter, 1);
switch (context->counter++) {
case 0: {
Node* embedder_node_A = graph->AddNode(
std::unique_ptr<Node>(new EmbedderNode("EmbedderNodeA", 10)));
graph->AddEdge(global_node, embedder_node_A);
break;
}
case 1: {
Node* embedder_node_B = graph->AddNode(
std::unique_ptr<Node>(new EmbedderNode("EmbedderNodeB", 20)));
graph->AddEdge(global_node, embedder_node_B);
break;
}
}
}

TEST(EmbedderGraphMultipleCallbacks) {
i::FLAG_heap_profiler_use_embedder_graph = true;
LocalContext env;
v8::HandleScope scope(env->GetIsolate());
i::Isolate* isolate = reinterpret_cast<i::Isolate*>(env->GetIsolate());
v8::Local<v8::Value> global_object =
v8::Utils::ToLocal(i::Handle<i::JSObject>(
(isolate->context()->native_context()->global_object())));
global_object_pointer = &global_object;
v8::HeapProfiler* heap_profiler = env->GetIsolate()->GetHeapProfiler();
GraphBuildingContext context;

heap_profiler->AddBuildEmbedderGraphCallback(BuildEmbedderGraphWithContext,
&context);
heap_profiler->AddBuildEmbedderGraphCallback(BuildEmbedderGraphWithContext,
&context);
const v8::HeapSnapshot* snapshot = heap_profiler->TakeHeapSnapshot();
CHECK_EQ(context.counter, 2);
CHECK(ValidateSnapshot(snapshot));
CheckEmbedderGraphSnapshotWithContext(env->GetIsolate(), snapshot, &context);

heap_profiler->RemoveBuildEmbedderGraphCallback(BuildEmbedderGraphWithContext,
&context);
context.counter = 0;

snapshot = heap_profiler->TakeHeapSnapshot();
CHECK_EQ(context.counter, 1);
CHECK(ValidateSnapshot(snapshot));
CheckEmbedderGraphSnapshotWithContext(env->GetIsolate(), snapshot, &context);
}

TEST(StrongHandleAnnotation) {
LocalContext env;
v8::HandleScope scope(env->GetIsolate());
Expand All @@ -3010,7 +3091,7 @@ TEST(StrongHandleAnnotation) {
}

void BuildEmbedderGraphWithWrapperNode(v8::Isolate* v8_isolate,
v8::EmbedderGraph* graph) {
v8::EmbedderGraph* graph, void* data) {
using Node = v8::EmbedderGraph::Node;
Node* global_node = graph->V8Node(*global_object_pointer);
Node* wrapper_node = graph->AddNode(
Expand Down Expand Up @@ -3041,8 +3122,8 @@ TEST(EmbedderGraphWithWrapperNode) {
(isolate->context()->native_context()->global_object())));
global_object_pointer = &global_object;
v8::HeapProfiler* heap_profiler = env->GetIsolate()->GetHeapProfiler();
heap_profiler->SetBuildEmbedderGraphCallback(
BuildEmbedderGraphWithWrapperNode);
heap_profiler->AddBuildEmbedderGraphCallback(
BuildEmbedderGraphWithWrapperNode, nullptr);
const v8::HeapSnapshot* snapshot = heap_profiler->TakeHeapSnapshot();
CHECK(ValidateSnapshot(snapshot));
const v8::HeapGraphNode* global = GetGlobalObject(snapshot);
Expand Down Expand Up @@ -3080,7 +3161,7 @@ class EmbedderNodeWithPrefix : public v8::EmbedderGraph::Node {
};

void BuildEmbedderGraphWithPrefix(v8::Isolate* v8_isolate,
v8::EmbedderGraph* graph) {
v8::EmbedderGraph* graph, void* data) {
using Node = v8::EmbedderGraph::Node;
Node* global_node = graph->V8Node(*global_object_pointer);
Node* node = graph->AddNode(
Expand All @@ -3098,7 +3179,8 @@ TEST(EmbedderGraphWithPrefix) {
(isolate->context()->native_context()->global_object())));
global_object_pointer = &global_object;
v8::HeapProfiler* heap_profiler = env->GetIsolate()->GetHeapProfiler();
heap_profiler->SetBuildEmbedderGraphCallback(BuildEmbedderGraphWithPrefix);
heap_profiler->AddBuildEmbedderGraphCallback(BuildEmbedderGraphWithPrefix,
nullptr);
const v8::HeapSnapshot* snapshot = heap_profiler->TakeHeapSnapshot();
CHECK(ValidateSnapshot(snapshot));
const v8::HeapGraphNode* global = GetGlobalObject(snapshot);
Expand Down

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