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239dd8124b
v8/test/cctest/test-heap-profiler.cc
Ulan Degenbaev 239dd8124b New API for capturing embedder object graph in heap snapshot. 
That patch introduces EmbedderGraph interface that embedders can use to
represent C++ objects that retain or are retained by V8 JS objects.

The heap snapshot generator adds nodes and edges of the EmbedderGraph to
the heap snapshot, allowing arbitrarily complex retaining paths that
cross V8/Embedder boundary.

The new functionality is enabled only if the embedder sets the
BuildEmbedderGraph callback.


Bug: chromium:749490

Cq-Include-Trybots: master.tryserver.chromium.linux:linux_chromium_rel_ng
Change-Id: I10a1fa000d6d4ba47fc19d84c7cfc2c619d496fc
Reviewed-on: https://chromium-review.googlesource.com/890521
Reviewed-by: Alexei Filippov <alph@chromium.org>
Reviewed-by: Michael Lippautz <mlippautz@chromium.org>
Commit-Queue: Ulan Degenbaev <ulan@chromium.org>
Cr-Commit-Position: refs/heads/master@{#51016}
2018-02-01 08:05:14 +00:00

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// Copyright 2011 the V8 project authors. All rights reserved.
// Redistribution and use in source and binary forms, with or without
// modification, are permitted provided that the following conditions are
// met:
//
// * Redistributions of source code must retain the above copyright
// notice, this list of conditions and the following disclaimer.
// * Redistributions in binary form must reproduce the above
// copyright notice, this list of conditions and the following
// disclaimer in the documentation and/or other materials provided
// with the distribution.
// * Neither the name of Google Inc. nor the names of its
// contributors may be used to endorse or promote products derived
// from this software without specific prior written permission.
//
// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
//
// Tests for heap profiler
#include <ctype.h>
#include <memory>
#include "src/v8.h"
#include "include/v8-profiler.h"
#include "src/api.h"
#include "src/base/hashmap.h"
#include "src/collector.h"
#include "src/debug/debug.h"
#include "src/objects-inl.h"
#include "src/profiler/allocation-tracker.h"
#include "src/profiler/heap-profiler.h"
#include "src/profiler/heap-snapshot-generator-inl.h"
#include "test/cctest/cctest.h"
using i::AllocationTraceNode;
using i::AllocationTraceTree;
using i::AllocationTracker;
using i::ArrayVector;
using i::Vector;
namespace {
class NamedEntriesDetector {
public:
NamedEntriesDetector()
: has_A2(false), has_B2(false), has_C2(false) {
}
void CheckEntry(i::HeapEntry* entry) {
if (strcmp(entry->name(), "A2") == 0) has_A2 = true;
if (strcmp(entry->name(), "B2") == 0) has_B2 = true;
if (strcmp(entry->name(), "C2") == 0) has_C2 = true;
}
void CheckAllReachables(i::HeapEntry* root) {
v8::base::HashMap visited;
std::vector<i::HeapEntry*> list;
list.push_back(root);
CheckEntry(root);
while (!list.empty()) {
i::HeapEntry* entry = list.back();
list.pop_back();
for (int i = 0; i < entry->children_count(); ++i) {
i::HeapGraphEdge* edge = entry->child(i);
if (edge->type() == i::HeapGraphEdge::kShortcut) continue;
i::HeapEntry* child = edge->to();
v8::base::HashMap::Entry* entry = visited.LookupOrInsert(
reinterpret_cast<void*>(child),
static_cast<uint32_t>(reinterpret_cast<uintptr_t>(child)));
if (entry->value)
continue;
entry->value = reinterpret_cast<void*>(1);
list.push_back(child);
CheckEntry(child);
}
}
}
bool has_A2;
bool has_B2;
bool has_C2;
};
} // namespace
static const v8::HeapGraphNode* GetGlobalObject(
const v8::HeapSnapshot* snapshot) {
// The 0th-child is (GC Roots), 1st is the user root.
const v8::HeapGraphNode* global_obj =
snapshot->GetRoot()->GetChild(1)->GetToNode();
CHECK_EQ(0, strncmp("Object", const_cast<i::HeapEntry*>(
reinterpret_cast<const i::HeapEntry*>(global_obj))->name(), 6));
return global_obj;
}
static const char* GetName(const v8::HeapGraphNode* node) {
return const_cast<i::HeapEntry*>(reinterpret_cast<const i::HeapEntry*>(node))
->name();
}
static size_t GetSize(const v8::HeapGraphNode* node) {
return const_cast<i::HeapEntry*>(reinterpret_cast<const i::HeapEntry*>(node))
->self_size();
}
static const v8::HeapGraphNode* GetChildByName(const v8::HeapGraphNode* node,
const char* name) {
for (int i = 0, count = node->GetChildrenCount(); i < count; ++i) {
const v8::HeapGraphNode* child = node->GetChild(i)->GetToNode();
if (!strcmp(name, GetName(child))) {
return child;
}
}
return nullptr;
}
static const v8::HeapGraphNode* GetRootChild(const v8::HeapSnapshot* snapshot,
const char* name) {
return GetChildByName(snapshot->GetRoot(), name);
}
static const v8::HeapGraphNode* GetProperty(v8::Isolate* isolate,
const v8::HeapGraphNode* node,
v8::HeapGraphEdge::Type type,
const char* name) {
for (int i = 0, count = node->GetChildrenCount(); i < count; ++i) {
const v8::HeapGraphEdge* prop = node->GetChild(i);
v8::String::Utf8Value prop_name(isolate, prop->GetName());
if (prop->GetType() == type && strcmp(name, *prop_name) == 0)
return prop->GetToNode();
}
return nullptr;
}
static bool HasString(v8::Isolate* isolate, const v8::HeapGraphNode* node,
const char* contents) {
for (int i = 0, count = node->GetChildrenCount(); i < count; ++i) {
const v8::HeapGraphEdge* prop = node->GetChild(i);
const v8::HeapGraphNode* node = prop->GetToNode();
if (node->GetType() == v8::HeapGraphNode::kString) {
v8::String::Utf8Value node_name(isolate, node->GetName());
if (strcmp(contents, *node_name) == 0) return true;
}
}
return false;
}
static void EnsureNoUninstrumentedInternals(v8::Isolate* isolate,
const v8::HeapGraphNode* node) {
for (int i = 0; i < 20; ++i) {
i::ScopedVector<char> buffer(10);
const v8::HeapGraphNode* internal =
GetProperty(isolate, node, v8::HeapGraphEdge::kInternal,
i::IntToCString(i, buffer));
CHECK(!internal);
}
}
// Check that snapshot has no unretained entries except root.
static bool ValidateSnapshot(const v8::HeapSnapshot* snapshot, int depth = 3) {
i::HeapSnapshot* heap_snapshot = const_cast<i::HeapSnapshot*>(
reinterpret_cast<const i::HeapSnapshot*>(snapshot));
v8::base::HashMap visited;
std::deque<i::HeapGraphEdge>& edges = heap_snapshot->edges();
for (size_t i = 0; i < edges.size(); ++i) {
v8::base::HashMap::Entry* entry = visited.LookupOrInsert(
reinterpret_cast<void*>(edges[i].to()),
static_cast<uint32_t>(reinterpret_cast<uintptr_t>(edges[i].to())));
uint32_t ref_count = static_cast<uint32_t>(
reinterpret_cast<uintptr_t>(entry->value));
entry->value = reinterpret_cast<void*>(ref_count + 1);
}
uint32_t unretained_entries_count = 0;
std::vector<i::HeapEntry>& entries = heap_snapshot->entries();
for (i::HeapEntry& entry : entries) {
v8::base::HashMap::Entry* map_entry = visited.Lookup(
reinterpret_cast<void*>(&entry),
static_cast<uint32_t>(reinterpret_cast<uintptr_t>(&entry)));
if (!map_entry && entry.id() != 1) {
entry.Print("entry with no retainer", "", depth, 0);
++unretained_entries_count;
}
}
return unretained_entries_count == 0;
}
TEST(HeapSnapshot) {
LocalContext env2;
v8::HandleScope scope(env2->GetIsolate());
v8::HeapProfiler* heap_profiler = env2->GetIsolate()->GetHeapProfiler();
CompileRun(
"function A2() {}\n"
"function B2(x) { return function() { return typeof x; }; }\n"
"function C2(x) { this.x1 = x; this.x2 = x; this[1] = x; }\n"
"var a2 = new A2();\n"
"var b2_1 = new B2(a2), b2_2 = new B2(a2);\n"
"var c2 = new C2(a2);");
const v8::HeapSnapshot* snapshot_env2 = heap_profiler->TakeHeapSnapshot();
CHECK(ValidateSnapshot(snapshot_env2));
const v8::HeapGraphNode* global_env2 = GetGlobalObject(snapshot_env2);
// Verify, that JS global object of env2 has '..2' properties.
const v8::HeapGraphNode* a2_node = GetProperty(
env2->GetIsolate(), global_env2, v8::HeapGraphEdge::kProperty, "a2");
CHECK(a2_node);
CHECK(GetProperty(env2->GetIsolate(), global_env2,
v8::HeapGraphEdge::kProperty, "b2_1"));
CHECK(GetProperty(env2->GetIsolate(), global_env2,
v8::HeapGraphEdge::kProperty, "b2_2"));
CHECK(GetProperty(env2->GetIsolate(), global_env2,
v8::HeapGraphEdge::kProperty, "c2"));
NamedEntriesDetector det;
det.CheckAllReachables(const_cast<i::HeapEntry*>(
reinterpret_cast<const i::HeapEntry*>(global_env2)));
CHECK(det.has_A2);
CHECK(det.has_B2);
CHECK(det.has_C2);
}
TEST(HeapSnapshotObjectSizes) {
LocalContext env;
v8::HandleScope scope(env->GetIsolate());
v8::HeapProfiler* heap_profiler = env->GetIsolate()->GetHeapProfiler();
// -a-> X1 --a
// x -b-> X2 <-|
CompileRun(
"function X(a, b) { this.a = a; this.b = b; }\n"
"x = new X(new X(), new X());\n"
"dummy = new X();\n"
"(function() { x.a.a = x.b; })();");
const v8::HeapSnapshot* snapshot = heap_profiler->TakeHeapSnapshot();
CHECK(ValidateSnapshot(snapshot));
const v8::HeapGraphNode* global = GetGlobalObject(snapshot);
const v8::HeapGraphNode* x =
GetProperty(env->GetIsolate(), global, v8::HeapGraphEdge::kProperty, "x");
CHECK(x);
const v8::HeapGraphNode* x1 =
GetProperty(env->GetIsolate(), x, v8::HeapGraphEdge::kProperty, "a");
CHECK(x1);
const v8::HeapGraphNode* x2 =
GetProperty(env->GetIsolate(), x, v8::HeapGraphEdge::kProperty, "b");
CHECK(x2);
// Test sizes.
CHECK_NE(0, static_cast<int>(x->GetShallowSize()));
CHECK_NE(0, static_cast<int>(x1->GetShallowSize()));
CHECK_NE(0, static_cast<int>(x2->GetShallowSize()));
}
TEST(BoundFunctionInSnapshot) {
LocalContext env;
v8::HandleScope scope(env->GetIsolate());
v8::HeapProfiler* heap_profiler = env->GetIsolate()->GetHeapProfiler();
CompileRun(
"function myFunction(a, b) { this.a = a; this.b = b; }\n"
"function AAAAA() {}\n"
"boundFunction = myFunction.bind(new AAAAA(), 20, new Number(12)); \n");
const v8::HeapSnapshot* snapshot = heap_profiler->TakeHeapSnapshot();
CHECK(ValidateSnapshot(snapshot));
const v8::HeapGraphNode* global = GetGlobalObject(snapshot);
const v8::HeapGraphNode* f = GetProperty(
env->GetIsolate(), global, v8::HeapGraphEdge::kProperty, "boundFunction");
CHECK(f);
CHECK(v8_str("native_bind")->Equals(env.local(), f->GetName()).FromJust());
const v8::HeapGraphNode* bindings = GetProperty(
env->GetIsolate(), f, v8::HeapGraphEdge::kInternal, "bindings");
CHECK(bindings);
CHECK_EQ(v8::HeapGraphNode::kArray, bindings->GetType());
CHECK_EQ(1, bindings->GetChildrenCount());
const v8::HeapGraphNode* bound_this = GetProperty(
env->GetIsolate(), f, v8::HeapGraphEdge::kInternal, "bound_this");
CHECK(bound_this);
CHECK_EQ(v8::HeapGraphNode::kObject, bound_this->GetType());
const v8::HeapGraphNode* bound_function = GetProperty(
env->GetIsolate(), f, v8::HeapGraphEdge::kInternal, "bound_function");
CHECK(bound_function);
CHECK_EQ(v8::HeapGraphNode::kClosure, bound_function->GetType());
const v8::HeapGraphNode* bound_argument = GetProperty(
env->GetIsolate(), f, v8::HeapGraphEdge::kShortcut, "bound_argument_1");
CHECK(bound_argument);
CHECK_EQ(v8::HeapGraphNode::kObject, bound_argument->GetType());
}
TEST(HeapSnapshotEntryChildren) {
LocalContext env;
v8::HandleScope scope(env->GetIsolate());
v8::HeapProfiler* heap_profiler = env->GetIsolate()->GetHeapProfiler();
CompileRun(
"function A() { }\n"
"a = new A;");
const v8::HeapSnapshot* snapshot = heap_profiler->TakeHeapSnapshot();
CHECK(ValidateSnapshot(snapshot));
const v8::HeapGraphNode* global = GetGlobalObject(snapshot);
for (int i = 0, count = global->GetChildrenCount(); i < count; ++i) {
const v8::HeapGraphEdge* prop = global->GetChild(i);
CHECK_EQ(global, prop->GetFromNode());
}
const v8::HeapGraphNode* a =
GetProperty(env->GetIsolate(), global, v8::HeapGraphEdge::kProperty, "a");
CHECK(a);
for (int i = 0, count = a->GetChildrenCount(); i < count; ++i) {
const v8::HeapGraphEdge* prop = a->GetChild(i);
CHECK_EQ(a, prop->GetFromNode());
}
}
TEST(HeapSnapshotCodeObjects) {
LocalContext env;
v8::HandleScope scope(env->GetIsolate());
v8::HeapProfiler* heap_profiler = env->GetIsolate()->GetHeapProfiler();
CompileRun(
"function lazy(x) { return x - 1; }\n"
"function compiled(x) { return x + 1; }\n"
"var anonymous = (function() { return function() { return 0; } })();\n"
"compiled(1)");
const v8::HeapSnapshot* snapshot = heap_profiler->TakeHeapSnapshot();
CHECK(ValidateSnapshot(snapshot));
const v8::HeapGraphNode* global = GetGlobalObject(snapshot);
const v8::HeapGraphNode* compiled = GetProperty(
env->GetIsolate(), global, v8::HeapGraphEdge::kProperty, "compiled");
CHECK(compiled);
CHECK_EQ(v8::HeapGraphNode::kClosure, compiled->GetType());
const v8::HeapGraphNode* lazy = GetProperty(
env->GetIsolate(), global, v8::HeapGraphEdge::kProperty, "lazy");
CHECK(lazy);
CHECK_EQ(v8::HeapGraphNode::kClosure, lazy->GetType());
const v8::HeapGraphNode* anonymous = GetProperty(
env->GetIsolate(), global, v8::HeapGraphEdge::kProperty, "anonymous");
CHECK(anonymous);
CHECK_EQ(v8::HeapGraphNode::kClosure, anonymous->GetType());
v8::String::Utf8Value anonymous_name(env->GetIsolate(), anonymous->GetName());
CHECK_EQ(0, strcmp("", *anonymous_name));
// Find references to code.
const v8::HeapGraphNode* compiled_code = GetProperty(
env->GetIsolate(), compiled, v8::HeapGraphEdge::kInternal, "shared");
CHECK(compiled_code);
const v8::HeapGraphNode* lazy_code = GetProperty(
env->GetIsolate(), lazy, v8::HeapGraphEdge::kInternal, "shared");
CHECK(lazy_code);
// Check that there's no strong next_code_link. There might be a weak one
// but might be not, so we can't check that fact.
const v8::HeapGraphNode* code = GetProperty(
env->GetIsolate(), compiled_code, v8::HeapGraphEdge::kInternal, "code");
CHECK(code);
const v8::HeapGraphNode* next_code_link = GetProperty(
env->GetIsolate(), code, v8::HeapGraphEdge::kInternal, "code");
CHECK(!next_code_link);
// Verify that non-compiled code doesn't contain references to "x"
// literal, while compiled code does. The scope info is stored in FixedArray
// objects attached to the SharedFunctionInfo.
bool compiled_references_x = false, lazy_references_x = false;
for (int i = 0, count = compiled_code->GetChildrenCount(); i < count; ++i) {
const v8::HeapGraphEdge* prop = compiled_code->GetChild(i);
const v8::HeapGraphNode* node = prop->GetToNode();
if (node->GetType() == v8::HeapGraphNode::kArray) {
if (HasString(env->GetIsolate(), node, "x")) {
compiled_references_x = true;
break;
}
}
}
for (int i = 0, count = lazy_code->GetChildrenCount(); i < count; ++i) {
const v8::HeapGraphEdge* prop = lazy_code->GetChild(i);
const v8::HeapGraphNode* node = prop->GetToNode();
if (node->GetType() == v8::HeapGraphNode::kArray) {
if (HasString(env->GetIsolate(), node, "x")) {
lazy_references_x = true;
break;
}
}
}
CHECK(compiled_references_x);
if (i::FLAG_lazy) {
CHECK(!lazy_references_x);
}
}
TEST(HeapSnapshotHeapNumbers) {
LocalContext env;
v8::HandleScope scope(env->GetIsolate());
v8::HeapProfiler* heap_profiler = env->GetIsolate()->GetHeapProfiler();
CompileRun(
"a = 1; // a is Smi\n"
"b = 2.5; // b is HeapNumber");
const v8::HeapSnapshot* snapshot = heap_profiler->TakeHeapSnapshot();
CHECK(ValidateSnapshot(snapshot));
const v8::HeapGraphNode* global = GetGlobalObject(snapshot);
CHECK(!GetProperty(env->GetIsolate(), global, v8::HeapGraphEdge::kProperty,
"a"));
const v8::HeapGraphNode* b =
GetProperty(env->GetIsolate(), global, v8::HeapGraphEdge::kProperty, "b");
CHECK(b);
CHECK_EQ(v8::HeapGraphNode::kHeapNumber, b->GetType());
}
TEST(HeapSnapshotSlicedString) {
if (!i::FLAG_string_slices) return;
LocalContext env;
v8::HandleScope scope(env->GetIsolate());
v8::HeapProfiler* heap_profiler = env->GetIsolate()->GetHeapProfiler();
CompileRun(
"parent_string = \"123456789.123456789.123456789.123456789.123456789."
"123456789.123456789.123456789.123456789.123456789."
"123456789.123456789.123456789.123456789.123456789."
"123456789.123456789.123456789.123456789.123456789."
"123456789.123456789.123456789.123456789.123456789."
"123456789.123456789.123456789.123456789.123456789."
"123456789.123456789.123456789.123456789.123456789."
"123456789.123456789.123456789.123456789.123456789.\";"
"child_string = parent_string.slice(100);");
const v8::HeapSnapshot* snapshot = heap_profiler->TakeHeapSnapshot();
CHECK(ValidateSnapshot(snapshot));
const v8::HeapGraphNode* global = GetGlobalObject(snapshot);
const v8::HeapGraphNode* parent_string = GetProperty(
env->GetIsolate(), global, v8::HeapGraphEdge::kProperty, "parent_string");
CHECK(parent_string);
const v8::HeapGraphNode* child_string = GetProperty(
env->GetIsolate(), global, v8::HeapGraphEdge::kProperty, "child_string");
CHECK(child_string);
CHECK_EQ(v8::HeapGraphNode::kSlicedString, child_string->GetType());
const v8::HeapGraphNode* parent = GetProperty(
env->GetIsolate(), child_string, v8::HeapGraphEdge::kInternal, "parent");
CHECK_EQ(parent_string, parent);
heap_profiler->DeleteAllHeapSnapshots();
}
TEST(HeapSnapshotConsString) {
v8::Isolate* isolate = CcTest::isolate();
v8::HandleScope scope(isolate);
v8::Local<v8::ObjectTemplate> global_template =
v8::ObjectTemplate::New(isolate);
global_template->SetInternalFieldCount(1);
LocalContext env(nullptr, global_template);
v8::Local<v8::Object> global_proxy = env->Global();
v8::Local<v8::Object> global = global_proxy->GetPrototype().As<v8::Object>();
CHECK_EQ(1, global->InternalFieldCount());
i::Factory* factory = CcTest::i_isolate()->factory();
i::Handle<i::String> first = factory->NewStringFromStaticChars("0123456789");
i::Handle<i::String> second = factory->NewStringFromStaticChars("0123456789");
i::Handle<i::String> cons_string =
factory->NewConsString(first, second).ToHandleChecked();
global->SetInternalField(0, v8::ToApiHandle<v8::String>(cons_string));
v8::HeapProfiler* heap_profiler = isolate->GetHeapProfiler();
const v8::HeapSnapshot* snapshot = heap_profiler->TakeHeapSnapshot();
CHECK(ValidateSnapshot(snapshot));
const v8::HeapGraphNode* global_node = GetGlobalObject(snapshot);
const v8::HeapGraphNode* string_node =
GetProperty(isolate, global_node, v8::HeapGraphEdge::kInternal, "0");
CHECK(string_node);
CHECK_EQ(v8::HeapGraphNode::kConsString, string_node->GetType());
const v8::HeapGraphNode* first_node =
GetProperty(isolate, string_node, v8::HeapGraphEdge::kInternal, "first");
CHECK_EQ(v8::HeapGraphNode::kString, first_node->GetType());
const v8::HeapGraphNode* second_node =
GetProperty(isolate, string_node, v8::HeapGraphEdge::kInternal, "second");
CHECK_EQ(v8::HeapGraphNode::kString, second_node->GetType());
heap_profiler->DeleteAllHeapSnapshots();
}
TEST(HeapSnapshotSymbol) {
LocalContext env;
v8::HandleScope scope(env->GetIsolate());
v8::HeapProfiler* heap_profiler = env->GetIsolate()->GetHeapProfiler();
CompileRun("a = Symbol('mySymbol');\n");
const v8::HeapSnapshot* snapshot = heap_profiler->TakeHeapSnapshot();
CHECK(ValidateSnapshot(snapshot));
const v8::HeapGraphNode* global = GetGlobalObject(snapshot);
const v8::HeapGraphNode* a =
GetProperty(env->GetIsolate(), global, v8::HeapGraphEdge::kProperty, "a");
CHECK(a);
CHECK_EQ(a->GetType(), v8::HeapGraphNode::kSymbol);
CHECK(v8_str("symbol")->Equals(env.local(), a->GetName()).FromJust());
const v8::HeapGraphNode* name =
GetProperty(env->GetIsolate(), a, v8::HeapGraphEdge::kInternal, "name");
CHECK(name);
CHECK(v8_str("mySymbol")->Equals(env.local(), name->GetName()).FromJust());
}
TEST(HeapSnapshotWeakCollection) {
LocalContext env;
v8::HandleScope scope(env->GetIsolate());
v8::HeapProfiler* heap_profiler = env->GetIsolate()->GetHeapProfiler();
CompileRun(
"k = {}; v = {}; s = 'str';\n"
"ws = new WeakSet(); ws.add(k); ws.add(v); ws[s] = s;\n"
"wm = new WeakMap(); wm.set(k, v); wm[s] = s;\n");
const v8::HeapSnapshot* snapshot = heap_profiler->TakeHeapSnapshot();
CHECK(ValidateSnapshot(snapshot));
const v8::HeapGraphNode* global = GetGlobalObject(snapshot);
const v8::HeapGraphNode* k =
GetProperty(env->GetIsolate(), global, v8::HeapGraphEdge::kProperty, "k");
CHECK(k);
const v8::HeapGraphNode* v =
GetProperty(env->GetIsolate(), global, v8::HeapGraphEdge::kProperty, "v");
CHECK(v);
const v8::HeapGraphNode* s =
GetProperty(env->GetIsolate(), global, v8::HeapGraphEdge::kProperty, "s");
CHECK(s);
const v8::HeapGraphNode* ws = GetProperty(env->GetIsolate(), global,
v8::HeapGraphEdge::kProperty, "ws");
CHECK(ws);
CHECK_EQ(v8::HeapGraphNode::kObject, ws->GetType());
CHECK(v8_str("WeakSet")->Equals(env.local(), ws->GetName()).FromJust());
const v8::HeapGraphNode* ws_table =
GetProperty(env->GetIsolate(), ws, v8::HeapGraphEdge::kInternal, "table");
CHECK_EQ(v8::HeapGraphNode::kArray, ws_table->GetType());
CHECK_GT(ws_table->GetChildrenCount(), 0);
int weak_entries = 0;
for (int i = 0, count = ws_table->GetChildrenCount(); i < count; ++i) {
const v8::HeapGraphEdge* prop = ws_table->GetChild(i);
if (prop->GetType() != v8::HeapGraphEdge::kWeak) continue;
if (k->GetId() == prop->GetToNode()->GetId()) {
++weak_entries;
}
}
CHECK_EQ(1, weak_entries);
const v8::HeapGraphNode* ws_s =
GetProperty(env->GetIsolate(), ws, v8::HeapGraphEdge::kProperty, "str");
CHECK(ws_s);
CHECK_EQ(s->GetId(), ws_s->GetId());
const v8::HeapGraphNode* wm = GetProperty(env->GetIsolate(), global,
v8::HeapGraphEdge::kProperty, "wm");
CHECK(wm);
CHECK_EQ(v8::HeapGraphNode::kObject, wm->GetType());
CHECK(v8_str("WeakMap")->Equals(env.local(), wm->GetName()).FromJust());
const v8::HeapGraphNode* wm_table =
GetProperty(env->GetIsolate(), wm, v8::HeapGraphEdge::kInternal, "table");
CHECK_EQ(v8::HeapGraphNode::kArray, wm_table->GetType());
CHECK_GT(wm_table->GetChildrenCount(), 0);
weak_entries = 0;
for (int i = 0, count = wm_table->GetChildrenCount(); i < count; ++i) {
const v8::HeapGraphEdge* prop = wm_table->GetChild(i);
if (prop->GetType() != v8::HeapGraphEdge::kWeak) continue;
const v8::SnapshotObjectId to_node_id = prop->GetToNode()->GetId();
if (to_node_id == k->GetId() || to_node_id == v->GetId()) {
++weak_entries;
}
}
CHECK_EQ(1, weak_entries); // Key is the only weak.
const v8::HeapGraphNode* wm_s =
GetProperty(env->GetIsolate(), wm, v8::HeapGraphEdge::kProperty, "str");
CHECK(wm_s);
CHECK_EQ(s->GetId(), wm_s->GetId());
}
TEST(HeapSnapshotCollection) {
LocalContext env;
v8::HandleScope scope(env->GetIsolate());
v8::HeapProfiler* heap_profiler = env->GetIsolate()->GetHeapProfiler();
CompileRun(
"k = {}; v = {}; s = 'str';\n"
"set = new Set(); set.add(k); set.add(v); set[s] = s;\n"
"map = new Map(); map.set(k, v); map[s] = s;\n");
const v8::HeapSnapshot* snapshot = heap_profiler->TakeHeapSnapshot();
CHECK(ValidateSnapshot(snapshot));
const v8::HeapGraphNode* global = GetGlobalObject(snapshot);
const v8::HeapGraphNode* k =
GetProperty(env->GetIsolate(), global, v8::HeapGraphEdge::kProperty, "k");
CHECK(k);
const v8::HeapGraphNode* v =
GetProperty(env->GetIsolate(), global, v8::HeapGraphEdge::kProperty, "v");
CHECK(v);
const v8::HeapGraphNode* s =
GetProperty(env->GetIsolate(), global, v8::HeapGraphEdge::kProperty, "s");
CHECK(s);
const v8::HeapGraphNode* set = GetProperty(
env->GetIsolate(), global, v8::HeapGraphEdge::kProperty, "set");
CHECK(set);
CHECK_EQ(v8::HeapGraphNode::kObject, set->GetType());
CHECK(v8_str("Set")->Equals(env.local(), set->GetName()).FromJust());
const v8::HeapGraphNode* set_table = GetProperty(
env->GetIsolate(), set, v8::HeapGraphEdge::kInternal, "table");
CHECK_EQ(v8::HeapGraphNode::kArray, set_table->GetType());
CHECK_GT(set_table->GetChildrenCount(), 0);
int entries = 0;
for (int i = 0, count = set_table->GetChildrenCount(); i < count; ++i) {
const v8::HeapGraphEdge* prop = set_table->GetChild(i);
const v8::SnapshotObjectId to_node_id = prop->GetToNode()->GetId();
if (to_node_id == k->GetId() || to_node_id == v->GetId()) {
++entries;
}
}
CHECK_EQ(2, entries);
const v8::HeapGraphNode* set_s =
GetProperty(env->GetIsolate(), set, v8::HeapGraphEdge::kProperty, "str");
CHECK(set_s);
CHECK_EQ(s->GetId(), set_s->GetId());
const v8::HeapGraphNode* map = GetProperty(
env->GetIsolate(), global, v8::HeapGraphEdge::kProperty, "map");
CHECK(map);
CHECK_EQ(v8::HeapGraphNode::kObject, map->GetType());
CHECK(v8_str("Map")->Equals(env.local(), map->GetName()).FromJust());
const v8::HeapGraphNode* map_table = GetProperty(
env->GetIsolate(), map, v8::HeapGraphEdge::kInternal, "table");
CHECK_EQ(v8::HeapGraphNode::kArray, map_table->GetType());
CHECK_GT(map_table->GetChildrenCount(), 0);
entries = 0;
for (int i = 0, count = map_table->GetChildrenCount(); i < count; ++i) {
const v8::HeapGraphEdge* prop = map_table->GetChild(i);
const v8::SnapshotObjectId to_node_id = prop->GetToNode()->GetId();
if (to_node_id == k->GetId() || to_node_id == v->GetId()) {
++entries;
}
}
CHECK_EQ(2, entries);
const v8::HeapGraphNode* map_s =
GetProperty(env->GetIsolate(), map, v8::HeapGraphEdge::kProperty, "str");
CHECK(map_s);
CHECK_EQ(s->GetId(), map_s->GetId());
}
TEST(HeapSnapshotMap) {
LocalContext env;
v8::HandleScope scope(env->GetIsolate());
v8::HeapProfiler* heap_profiler = env->GetIsolate()->GetHeapProfiler();
CompileRun(
"function Z() { this.foo = {}; }\n"
"z = new Z();\n");
const v8::HeapSnapshot* snapshot = heap_profiler->TakeHeapSnapshot();
CHECK(ValidateSnapshot(snapshot));
const v8::HeapGraphNode* global = GetGlobalObject(snapshot);
const v8::HeapGraphNode* z =
GetProperty(env->GetIsolate(), global, v8::HeapGraphEdge::kProperty, "z");
CHECK(z);
const v8::HeapGraphNode* map =
GetProperty(env->GetIsolate(), z, v8::HeapGraphEdge::kInternal, "map");
CHECK(map);
CHECK(
GetProperty(env->GetIsolate(), map, v8::HeapGraphEdge::kInternal, "map"));
CHECK(GetProperty(env->GetIsolate(), map, v8::HeapGraphEdge::kInternal,
"prototype"));
CHECK(GetProperty(env->GetIsolate(), map, v8::HeapGraphEdge::kInternal,
"back_pointer"));
CHECK(GetProperty(env->GetIsolate(), map, v8::HeapGraphEdge::kInternal,
"descriptors"));
const v8::HeapGraphNode* weak_cell = GetProperty(
env->GetIsolate(), map, v8::HeapGraphEdge::kInternal, "weak_cell_cache");
CHECK(GetProperty(env->GetIsolate(), weak_cell, v8::HeapGraphEdge::kWeak,
"value"));
}
TEST(HeapSnapshotInternalReferences) {
v8::Isolate* isolate = CcTest::isolate();
v8::HandleScope scope(isolate);
v8::Local<v8::ObjectTemplate> global_template =
v8::ObjectTemplate::New(isolate);
global_template->SetInternalFieldCount(2);
LocalContext env(nullptr, global_template);
v8::Local<v8::Object> global_proxy = env->Global();
v8::Local<v8::Object> global = global_proxy->GetPrototype().As<v8::Object>();
CHECK_EQ(2, global->InternalFieldCount());
v8::Local<v8::Object> obj = v8::Object::New(isolate);
global->SetInternalField(0, v8_num(17));
global->SetInternalField(1, obj);
v8::HeapProfiler* heap_profiler = isolate->GetHeapProfiler();
const v8::HeapSnapshot* snapshot = heap_profiler->TakeHeapSnapshot();
CHECK(ValidateSnapshot(snapshot));
const v8::HeapGraphNode* global_node = GetGlobalObject(snapshot);
// The first reference will not present, because it's a Smi.
CHECK(!GetProperty(env->GetIsolate(), global_node,
v8::HeapGraphEdge::kInternal, "0"));
// The second reference is to an object.
CHECK(GetProperty(env->GetIsolate(), global_node,
v8::HeapGraphEdge::kInternal, "1"));
}
TEST(HeapSnapshotAddressReuse) {
LocalContext env;
v8::HandleScope scope(env->GetIsolate());
v8::HeapProfiler* heap_profiler = env->GetIsolate()->GetHeapProfiler();
CompileRun(
"function A() {}\n"
"var a = [];\n"
"for (var i = 0; i < 10000; ++i)\n"
" a[i] = new A();\n");
const v8::HeapSnapshot* snapshot1 = heap_profiler->TakeHeapSnapshot();
CHECK(ValidateSnapshot(snapshot1));
v8::SnapshotObjectId maxId1 = snapshot1->GetMaxSnapshotJSObjectId();
CompileRun(
"for (var i = 0; i < 10000; ++i)\n"
" a[i] = new A();\n");
CcTest::CollectAllGarbage();
const v8::HeapSnapshot* snapshot2 = heap_profiler->TakeHeapSnapshot();
CHECK(ValidateSnapshot(snapshot2));
const v8::HeapGraphNode* global2 = GetGlobalObject(snapshot2);
const v8::HeapGraphNode* array_node = GetProperty(
env->GetIsolate(), global2, v8::HeapGraphEdge::kProperty, "a");
CHECK(array_node);
int wrong_count = 0;
for (int i = 0, count = array_node->GetChildrenCount(); i < count; ++i) {
const v8::HeapGraphEdge* prop = array_node->GetChild(i);
if (prop->GetType() != v8::HeapGraphEdge::kElement)
continue;
v8::SnapshotObjectId id = prop->GetToNode()->GetId();
if (id < maxId1)
++wrong_count;
}
CHECK_EQ(0, wrong_count);
}
TEST(HeapEntryIdsAndArrayShift) {
LocalContext env;
v8::HandleScope scope(env->GetIsolate());
v8::HeapProfiler* heap_profiler = env->GetIsolate()->GetHeapProfiler();
CompileRun(
"function AnObject() {\n"
" this.first = 'first';\n"
" this.second = 'second';\n"
"}\n"
"var a = new Array();\n"
"for (var i = 0; i < 10; ++i)\n"
" a.push(new AnObject());\n");
const v8::HeapSnapshot* snapshot1 = heap_profiler->TakeHeapSnapshot();
CHECK(ValidateSnapshot(snapshot1));
CompileRun(
"for (var i = 0; i < 1; ++i)\n"
" a.shift();\n");
CcTest::CollectAllGarbage();
const v8::HeapSnapshot* snapshot2 = heap_profiler->TakeHeapSnapshot();
CHECK(ValidateSnapshot(snapshot2));
const v8::HeapGraphNode* global1 = GetGlobalObject(snapshot1);
const v8::HeapGraphNode* global2 = GetGlobalObject(snapshot2);
CHECK_NE(0u, global1->GetId());
CHECK_EQ(global1->GetId(), global2->GetId());
const v8::HeapGraphNode* a1 = GetProperty(env->GetIsolate(), global1,
v8::HeapGraphEdge::kProperty, "a");
CHECK(a1);
const v8::HeapGraphNode* k1 = GetProperty(
env->GetIsolate(), a1, v8::HeapGraphEdge::kInternal, "elements");
CHECK(k1);
const v8::HeapGraphNode* a2 = GetProperty(env->GetIsolate(), global2,
v8::HeapGraphEdge::kProperty, "a");
CHECK(a2);
const v8::HeapGraphNode* k2 = GetProperty(
env->GetIsolate(), a2, v8::HeapGraphEdge::kInternal, "elements");
CHECK(k2);
CHECK_EQ(a1->GetId(), a2->GetId());
CHECK_EQ(k1->GetId(), k2->GetId());
}
TEST(HeapEntryIdsAndGC) {
LocalContext env;
v8::HandleScope scope(env->GetIsolate());
v8::HeapProfiler* heap_profiler = env->GetIsolate()->GetHeapProfiler();
CompileRun(
"function A() {}\n"
"function B(x) { this.x = x; }\n"
"var a = new A();\n"
"var b = new B(a);");
const v8::HeapSnapshot* snapshot1 = heap_profiler->TakeHeapSnapshot();
CHECK(ValidateSnapshot(snapshot1));
CcTest::CollectAllGarbage();
const v8::HeapSnapshot* snapshot2 = heap_profiler->TakeHeapSnapshot();
CHECK(ValidateSnapshot(snapshot2));
CHECK_GT(snapshot1->GetMaxSnapshotJSObjectId(), 7000u);
CHECK(snapshot1->GetMaxSnapshotJSObjectId() <=
snapshot2->GetMaxSnapshotJSObjectId());
const v8::HeapGraphNode* global1 = GetGlobalObject(snapshot1);
const v8::HeapGraphNode* global2 = GetGlobalObject(snapshot2);
CHECK_NE(0u, global1->GetId());
CHECK_EQ(global1->GetId(), global2->GetId());
const v8::HeapGraphNode* A1 = GetProperty(env->GetIsolate(), global1,
v8::HeapGraphEdge::kProperty, "A");
CHECK(A1);
const v8::HeapGraphNode* A2 = GetProperty(env->GetIsolate(), global2,
v8::HeapGraphEdge::kProperty, "A");
CHECK(A2);
CHECK_NE(0u, A1->GetId());
CHECK_EQ(A1->GetId(), A2->GetId());
const v8::HeapGraphNode* B1 = GetProperty(env->GetIsolate(), global1,
v8::HeapGraphEdge::kProperty, "B");
CHECK(B1);
const v8::HeapGraphNode* B2 = GetProperty(env->GetIsolate(), global2,
v8::HeapGraphEdge::kProperty, "B");
CHECK(B2);
CHECK_NE(0u, B1->GetId());
CHECK_EQ(B1->GetId(), B2->GetId());
const v8::HeapGraphNode* a1 = GetProperty(env->GetIsolate(), global1,
v8::HeapGraphEdge::kProperty, "a");
CHECK(a1);
const v8::HeapGraphNode* a2 = GetProperty(env->GetIsolate(), global2,
v8::HeapGraphEdge::kProperty, "a");
CHECK(a2);
CHECK_NE(0u, a1->GetId());
CHECK_EQ(a1->GetId(), a2->GetId());
const v8::HeapGraphNode* b1 = GetProperty(env->GetIsolate(), global1,
v8::HeapGraphEdge::kProperty, "b");
CHECK(b1);
const v8::HeapGraphNode* b2 = GetProperty(env->GetIsolate(), global2,
v8::HeapGraphEdge::kProperty, "b");
CHECK(b2);
CHECK_NE(0u, b1->GetId());
CHECK_EQ(b1->GetId(), b2->GetId());
}
TEST(HeapSnapshotRootPreservedAfterSorting) {
LocalContext env;
v8::HandleScope scope(env->GetIsolate());
v8::HeapProfiler* heap_profiler = env->GetIsolate()->GetHeapProfiler();
const v8::HeapSnapshot* snapshot = heap_profiler->TakeHeapSnapshot();
CHECK(ValidateSnapshot(snapshot));
const v8::HeapGraphNode* root1 = snapshot->GetRoot();
const_cast<i::HeapSnapshot*>(reinterpret_cast<const i::HeapSnapshot*>(
snapshot))->GetSortedEntriesList();
const v8::HeapGraphNode* root2 = snapshot->GetRoot();
CHECK_EQ(root1, root2);
}
namespace {
class TestJSONStream : public v8::OutputStream {
public:
TestJSONStream() : eos_signaled_(0), abort_countdown_(-1) {}
explicit TestJSONStream(int abort_countdown)
: eos_signaled_(0), abort_countdown_(abort_countdown) {}
virtual ~TestJSONStream() {}
virtual void EndOfStream() { ++eos_signaled_; }
virtual WriteResult WriteAsciiChunk(char* buffer, int chars_written) {
if (abort_countdown_ > 0) --abort_countdown_;
if (abort_countdown_ == 0) return kAbort;
CHECK_GT(chars_written, 0);
i::Vector<char> chunk = buffer_.AddBlock(chars_written, '\0');
i::MemCopy(chunk.start(), buffer, chars_written);
return kContinue;
}
virtual WriteResult WriteUint32Chunk(uint32_t* buffer, int chars_written) {
UNREACHABLE();
}
void WriteTo(i::Vector<char> dest) { buffer_.WriteTo(dest); }
int eos_signaled() { return eos_signaled_; }
int size() { return buffer_.size(); }
private:
i::Collector<char> buffer_;
int eos_signaled_;
int abort_countdown_;
};
class OneByteResource : public v8::String::ExternalOneByteStringResource {
public:
explicit OneByteResource(i::Vector<char> string) : data_(string.start()) {
length_ = string.length();
}
virtual const char* data() const { return data_; }
virtual size_t length() const { return length_; }
private:
const char* data_;
size_t length_;
};
} // namespace
TEST(HeapSnapshotJSONSerialization) {
v8::Isolate* isolate = CcTest::isolate();
LocalContext env;
v8::HandleScope scope(isolate);
v8::HeapProfiler* heap_profiler = isolate->GetHeapProfiler();
#define STRING_LITERAL_FOR_TEST \
"\"String \\n\\r\\u0008\\u0081\\u0101\\u0801\\u8001\""
CompileRun(
"function A(s) { this.s = s; }\n"
"function B(x) { this.x = x; }\n"
"var a = new A(" STRING_LITERAL_FOR_TEST ");\n"
"var b = new B(a);");
const v8::HeapSnapshot* snapshot = heap_profiler->TakeHeapSnapshot();
CHECK(ValidateSnapshot(snapshot));
TestJSONStream stream;
snapshot->Serialize(&stream, v8::HeapSnapshot::kJSON);
CHECK_GT(stream.size(), 0);
CHECK_EQ(1, stream.eos_signaled());
i::ScopedVector<char> json(stream.size());
stream.WriteTo(json);
// Verify that snapshot string is valid JSON.
OneByteResource* json_res = new OneByteResource(json);
v8::Local<v8::String> json_string =
v8::String::NewExternalOneByte(env->GetIsolate(), json_res)
.ToLocalChecked();
env->Global()
->Set(env.local(), v8_str("json_snapshot"), json_string)
.FromJust();
v8::Local<v8::Value> snapshot_parse_result = CompileRun(
"var parsed = JSON.parse(json_snapshot); true;");
CHECK(!snapshot_parse_result.IsEmpty());
// Verify that snapshot object has required fields.
v8::Local<v8::Object> parsed_snapshot =
env->Global()
->Get(env.local(), v8_str("parsed"))
.ToLocalChecked()
->ToObject(env.local())
.ToLocalChecked();
CHECK(parsed_snapshot->Has(env.local(), v8_str("snapshot")).FromJust());
CHECK(parsed_snapshot->Has(env.local(), v8_str("nodes")).FromJust());
CHECK(parsed_snapshot->Has(env.local(), v8_str("edges")).FromJust());
CHECK(parsed_snapshot->Has(env.local(), v8_str("strings")).FromJust());
// Get node and edge "member" offsets.
v8::Local<v8::Value> meta_analysis_result = CompileRun(
"var meta = parsed.snapshot.meta;\n"
"var edge_count_offset = meta.node_fields.indexOf('edge_count');\n"
"var node_fields_count = meta.node_fields.length;\n"
"var edge_fields_count = meta.edge_fields.length;\n"
"var edge_type_offset = meta.edge_fields.indexOf('type');\n"
"var edge_name_offset = meta.edge_fields.indexOf('name_or_index');\n"
"var edge_to_node_offset = meta.edge_fields.indexOf('to_node');\n"
"var property_type ="
" meta.edge_types[edge_type_offset].indexOf('property');\n"
"var shortcut_type ="
" meta.edge_types[edge_type_offset].indexOf('shortcut');\n"
"var node_count = parsed.nodes.length / node_fields_count;\n"
"var first_edge_indexes = parsed.first_edge_indexes = [];\n"
"for (var i = 0, first_edge_index = 0; i < node_count; ++i) {\n"
" first_edge_indexes[i] = first_edge_index;\n"
" first_edge_index += edge_fields_count *\n"
" parsed.nodes[i * node_fields_count + edge_count_offset];\n"
"}\n"
"first_edge_indexes[node_count] = first_edge_index;\n");
CHECK(!meta_analysis_result.IsEmpty());
// A helper function for processing encoded nodes.
CompileRun(
"function GetChildPosByProperty(pos, prop_name, prop_type) {\n"
" var nodes = parsed.nodes;\n"
" var edges = parsed.edges;\n"
" var strings = parsed.strings;\n"
" var node_ordinal = pos / node_fields_count;\n"
" for (var i = parsed.first_edge_indexes[node_ordinal],\n"
" count = parsed.first_edge_indexes[node_ordinal + 1];\n"
" i < count; i += edge_fields_count) {\n"
" if (edges[i + edge_type_offset] === prop_type\n"
" && strings[edges[i + edge_name_offset]] === prop_name)\n"
" return edges[i + edge_to_node_offset];\n"
" }\n"
" return null;\n"
"}\n");
// Get the string index using the path: <root> -> <global>.b.x.s
v8::Local<v8::Value> string_obj_pos_val = CompileRun(
"GetChildPosByProperty(\n"
" GetChildPosByProperty(\n"
" GetChildPosByProperty("
" parsed.edges[edge_fields_count + edge_to_node_offset],"
" \"b\", property_type),\n"
" \"x\", property_type),"
" \"s\", property_type)");
CHECK(!string_obj_pos_val.IsEmpty());
int string_obj_pos = static_cast<int>(
string_obj_pos_val->ToNumber(env.local()).ToLocalChecked()->Value());
v8::Local<v8::Object> nodes_array =
parsed_snapshot->Get(env.local(), v8_str("nodes"))
.ToLocalChecked()
->ToObject(env.local())
.ToLocalChecked();
int string_index =
static_cast<int>(nodes_array->Get(env.local(), string_obj_pos + 1)
.ToLocalChecked()
->ToNumber(env.local())
.ToLocalChecked()
->Value());
CHECK_GT(string_index, 0);
v8::Local<v8::Object> strings_array =
parsed_snapshot->Get(env.local(), v8_str("strings"))
.ToLocalChecked()
->ToObject(env.local())
.ToLocalChecked();
v8::Local<v8::String> string = strings_array->Get(env.local(), string_index)
.ToLocalChecked()
->ToString(env.local())
.ToLocalChecked();
v8::Local<v8::String> ref_string = CompileRun(STRING_LITERAL_FOR_TEST)
->ToString(env.local())
.ToLocalChecked();
#undef STRING_LITERAL_FOR_TEST
CHECK_EQ(0, strcmp(*v8::String::Utf8Value(env->GetIsolate(), ref_string),
*v8::String::Utf8Value(env->GetIsolate(), string)));
}
TEST(HeapSnapshotJSONSerializationAborting) {
LocalContext env;
v8::HandleScope scope(env->GetIsolate());
v8::HeapProfiler* heap_profiler = env->GetIsolate()->GetHeapProfiler();
const v8::HeapSnapshot* snapshot = heap_profiler->TakeHeapSnapshot();
CHECK(ValidateSnapshot(snapshot));
TestJSONStream stream(5);
snapshot->Serialize(&stream, v8::HeapSnapshot::kJSON);
CHECK_GT(stream.size(), 0);
CHECK_EQ(0, stream.eos_signaled());
}
namespace {
class TestStatsStream : public v8::OutputStream {
public:
TestStatsStream()
: eos_signaled_(0),
updates_written_(0),
entries_count_(0),
entries_size_(0),
intervals_count_(0),
first_interval_index_(-1) { }
TestStatsStream(const TestStatsStream& stream)
: v8::OutputStream(stream),
eos_signaled_(stream.eos_signaled_),
updates_written_(stream.updates_written_),
entries_count_(stream.entries_count_),
entries_size_(stream.entries_size_),
intervals_count_(stream.intervals_count_),
first_interval_index_(stream.first_interval_index_) { }
virtual ~TestStatsStream() {}
virtual void EndOfStream() { ++eos_signaled_; }
virtual WriteResult WriteAsciiChunk(char* buffer, int chars_written) {
UNREACHABLE();
}
virtual WriteResult WriteHeapStatsChunk(v8::HeapStatsUpdate* buffer,
int updates_written) {
++intervals_count_;
CHECK(updates_written);
updates_written_ += updates_written;
entries_count_ = 0;
if (first_interval_index_ == -1 && updates_written != 0)
first_interval_index_ = buffer[0].index;
for (int i = 0; i < updates_written; ++i) {
entries_count_ += buffer[i].count;
entries_size_ += buffer[i].size;
}
return kContinue;
}
int eos_signaled() { return eos_signaled_; }
int updates_written() { return updates_written_; }
uint32_t entries_count() const { return entries_count_; }
uint32_t entries_size() const { return entries_size_; }
int intervals_count() const { return intervals_count_; }
int first_interval_index() const { return first_interval_index_; }
private:
int eos_signaled_;
int updates_written_;
uint32_t entries_count_;
uint32_t entries_size_;
int intervals_count_;
int first_interval_index_;
};
} // namespace
static TestStatsStream GetHeapStatsUpdate(
v8::HeapProfiler* heap_profiler,
v8::SnapshotObjectId* object_id = nullptr) {
TestStatsStream stream;
int64_t timestamp = -1;
v8::SnapshotObjectId last_seen_id =
heap_profiler->GetHeapStats(&stream, &timestamp);
if (object_id)
*object_id = last_seen_id;
CHECK_NE(-1, timestamp);
CHECK_EQ(1, stream.eos_signaled());
return stream;
}
TEST(HeapSnapshotObjectsStats) {
LocalContext env;
v8::HandleScope scope(env->GetIsolate());
v8::HeapProfiler* heap_profiler = env->GetIsolate()->GetHeapProfiler();
heap_profiler->StartTrackingHeapObjects();
// We have to call GC 6 times. In other case the garbage will be
// the reason of flakiness.
for (int i = 0; i < 6; ++i) {
CcTest::CollectAllGarbage();
}
v8::SnapshotObjectId initial_id;
{
// Single chunk of data expected in update. Initial data.
TestStatsStream stats_update = GetHeapStatsUpdate(heap_profiler,
&initial_id);
CHECK_EQ(1, stats_update.intervals_count());
CHECK_EQ(1, stats_update.updates_written());
CHECK_LT(0u, stats_update.entries_size());
CHECK_EQ(0, stats_update.first_interval_index());
}
// No data expected in update because nothing has happened.
v8::SnapshotObjectId same_id;
CHECK_EQ(0, GetHeapStatsUpdate(heap_profiler, &same_id).updates_written());
CHECK_EQ(initial_id, same_id);
{
v8::SnapshotObjectId additional_string_id;
v8::HandleScope inner_scope_1(env->GetIsolate());
v8_str("string1");
{
// Single chunk of data with one new entry expected in update.
TestStatsStream stats_update = GetHeapStatsUpdate(heap_profiler,
&additional_string_id);
CHECK_LT(same_id, additional_string_id);
CHECK_EQ(1, stats_update.intervals_count());
CHECK_EQ(1, stats_update.updates_written());
CHECK_LT(0u, stats_update.entries_size());
CHECK_EQ(1u, stats_update.entries_count());
CHECK_EQ(2, stats_update.first_interval_index());
}
// No data expected in update because nothing happened.
v8::SnapshotObjectId last_id;
CHECK_EQ(0, GetHeapStatsUpdate(heap_profiler, &last_id).updates_written());
CHECK_EQ(additional_string_id, last_id);
{
v8::HandleScope inner_scope_2(env->GetIsolate());
v8_str("string2");
uint32_t entries_size;
{
v8::HandleScope inner_scope_3(env->GetIsolate());
v8_str("string3");
v8_str("string4");
{
// Single chunk of data with three new entries expected in update.
TestStatsStream stats_update = GetHeapStatsUpdate(heap_profiler);
CHECK_EQ(1, stats_update.intervals_count());
CHECK_EQ(1, stats_update.updates_written());
CHECK_LT(0u, entries_size = stats_update.entries_size());
CHECK_EQ(3u, stats_update.entries_count());
CHECK_EQ(4, stats_update.first_interval_index());
}
}
{
// Single chunk of data with two left entries expected in update.
TestStatsStream stats_update = GetHeapStatsUpdate(heap_profiler);
CHECK_EQ(1, stats_update.intervals_count());
CHECK_EQ(1, stats_update.updates_written());
CHECK_GT(entries_size, stats_update.entries_size());
CHECK_EQ(1u, stats_update.entries_count());
// Two strings from forth interval were released.
CHECK_EQ(4, stats_update.first_interval_index());
}
}
{
// Single chunk of data with 0 left entries expected in update.
TestStatsStream stats_update = GetHeapStatsUpdate(heap_profiler);
CHECK_EQ(1, stats_update.intervals_count());
CHECK_EQ(1, stats_update.updates_written());
CHECK_EQ(0u, stats_update.entries_size());
CHECK_EQ(0u, stats_update.entries_count());
// The last string from forth interval was released.
CHECK_EQ(4, stats_update.first_interval_index());
}
}
{
// Single chunk of data with 0 left entries expected in update.
TestStatsStream stats_update = GetHeapStatsUpdate(heap_profiler);
CHECK_EQ(1, stats_update.intervals_count());
CHECK_EQ(1, stats_update.updates_written());
CHECK_EQ(0u, stats_update.entries_size());
CHECK_EQ(0u, stats_update.entries_count());
// The only string from the second interval was released.
CHECK_EQ(2, stats_update.first_interval_index());
}
v8::Local<v8::Array> array = v8::Array::New(env->GetIsolate());
CHECK_EQ(0u, array->Length());
// Force array's buffer allocation.
array->Set(env.local(), 2, v8_num(7)).FromJust();
uint32_t entries_size;
{
// Single chunk of data with 2 entries expected in update.
TestStatsStream stats_update = GetHeapStatsUpdate(heap_profiler);
CHECK_EQ(1, stats_update.intervals_count());
CHECK_EQ(1, stats_update.updates_written());
CHECK_LT(0u, entries_size = stats_update.entries_size());
// They are the array and its buffer.
CHECK_EQ(2u, stats_update.entries_count());
CHECK_EQ(8, stats_update.first_interval_index());
}
for (int i = 0; i < 100; ++i)
array->Set(env.local(), i, v8_num(i)).FromJust();
{
// Single chunk of data with 1 entry expected in update.
TestStatsStream stats_update = GetHeapStatsUpdate(heap_profiler);
CHECK_EQ(1, stats_update.intervals_count());
// The first interval was changed because old buffer was collected.
// The second interval was changed because new buffer was allocated.
CHECK_EQ(2, stats_update.updates_written());
CHECK_LT(entries_size, stats_update.entries_size());
CHECK_EQ(2u, stats_update.entries_count());
CHECK_EQ(8, stats_update.first_interval_index());
}
heap_profiler->StopTrackingHeapObjects();
}
TEST(HeapObjectIds) {
LocalContext env;
v8::Isolate* isolate = env->GetIsolate();
v8::HandleScope scope(isolate);
v8::HeapProfiler* heap_profiler = env->GetIsolate()->GetHeapProfiler();
const int kLength = 10;
v8::Local<v8::Object> objects[kLength];
v8::SnapshotObjectId ids[kLength];
heap_profiler->StartTrackingHeapObjects(false);
for (int i = 0; i < kLength; i++) {
objects[i] = v8::Object::New(isolate);
}
GetHeapStatsUpdate(heap_profiler);
for (int i = 0; i < kLength; i++) {
v8::SnapshotObjectId id = heap_profiler->GetObjectId(objects[i]);
CHECK_NE(v8::HeapProfiler::kUnknownObjectId, id);
ids[i] = id;
}
heap_profiler->StopTrackingHeapObjects();
CcTest::CollectAllAvailableGarbage();
for (int i = 0; i < kLength; i++) {
v8::SnapshotObjectId id = heap_profiler->GetObjectId(objects[i]);
CHECK_EQ(ids[i], id);
v8::Local<v8::Value> obj = heap_profiler->FindObjectById(ids[i]);
CHECK(objects[i]->Equals(env.local(), obj).FromJust());
}
heap_profiler->ClearObjectIds();
for (int i = 0; i < kLength; i++) {
v8::SnapshotObjectId id = heap_profiler->GetObjectId(objects[i]);
CHECK_EQ(v8::HeapProfiler::kUnknownObjectId, id);
v8::Local<v8::Value> obj = heap_profiler->FindObjectById(ids[i]);
CHECK(obj.IsEmpty());
}
}
static void CheckChildrenIds(const v8::HeapSnapshot* snapshot,
const v8::HeapGraphNode* node,
int level, int max_level) {
if (level > max_level) return;
CHECK_EQ(node, snapshot->GetNodeById(node->GetId()));
for (int i = 0, count = node->GetChildrenCount(); i < count; ++i) {
const v8::HeapGraphEdge* prop = node->GetChild(i);
const v8::HeapGraphNode* child =
snapshot->GetNodeById(prop->GetToNode()->GetId());
CHECK_EQ(prop->GetToNode()->GetId(), child->GetId());
CHECK_EQ(prop->GetToNode(), child);
CheckChildrenIds(snapshot, child, level + 1, max_level);
}
}
TEST(HeapSnapshotGetNodeById) {
LocalContext env;
v8::HandleScope scope(env->GetIsolate());
v8::HeapProfiler* heap_profiler = env->GetIsolate()->GetHeapProfiler();
const v8::HeapSnapshot* snapshot = heap_profiler->TakeHeapSnapshot();
CHECK(ValidateSnapshot(snapshot));
const v8::HeapGraphNode* root = snapshot->GetRoot();
CheckChildrenIds(snapshot, root, 0, 3);
// Check a big id, which should not exist yet.
CHECK(!snapshot->GetNodeById(0x1000000UL));
}
TEST(HeapSnapshotGetSnapshotObjectId) {
LocalContext env;
v8::HandleScope scope(env->GetIsolate());
v8::HeapProfiler* heap_profiler = env->GetIsolate()->GetHeapProfiler();
CompileRun("globalObject = {};\n");
const v8::HeapSnapshot* snapshot = heap_profiler->TakeHeapSnapshot();
CHECK(ValidateSnapshot(snapshot));
const v8::HeapGraphNode* global = GetGlobalObject(snapshot);
const v8::HeapGraphNode* global_object = GetProperty(
env->GetIsolate(), global, v8::HeapGraphEdge::kProperty, "globalObject");
CHECK(global_object);
v8::Local<v8::Value> globalObjectHandle =
env->Global()->Get(env.local(), v8_str("globalObject")).ToLocalChecked();
CHECK(!globalObjectHandle.IsEmpty());
CHECK(globalObjectHandle->IsObject());
v8::SnapshotObjectId id = heap_profiler->GetObjectId(globalObjectHandle);
CHECK_NE(v8::HeapProfiler::kUnknownObjectId, id);
CHECK_EQ(id, global_object->GetId());
}
TEST(HeapSnapshotUnknownSnapshotObjectId) {
LocalContext env;
v8::HandleScope scope(env->GetIsolate());
v8::HeapProfiler* heap_profiler = env->GetIsolate()->GetHeapProfiler();
CompileRun("globalObject = {};\n");
const v8::HeapSnapshot* snapshot = heap_profiler->TakeHeapSnapshot();
CHECK(ValidateSnapshot(snapshot));
const v8::HeapGraphNode* node =
snapshot->GetNodeById(v8::HeapProfiler::kUnknownObjectId);
CHECK(!node);
}
namespace {
class TestActivityControl : public v8::ActivityControl {
public:
explicit TestActivityControl(int abort_count)
: done_(0), total_(0), abort_count_(abort_count) {}
ControlOption ReportProgressValue(int done, int total) {
done_ = done;
total_ = total;
return --abort_count_ != 0 ? kContinue : kAbort;
}
int done() { return done_; }
int total() { return total_; }
private:
int done_;
int total_;
int abort_count_;
};
} // namespace
TEST(TakeHeapSnapshotAborting) {
LocalContext env;
v8::HandleScope scope(env->GetIsolate());
v8::HeapProfiler* heap_profiler = env->GetIsolate()->GetHeapProfiler();
const int snapshots_count = heap_profiler->GetSnapshotCount();
TestActivityControl aborting_control(1);
const v8::HeapSnapshot* no_snapshot =
heap_profiler->TakeHeapSnapshot(&aborting_control);
CHECK(!no_snapshot);
CHECK_EQ(snapshots_count, heap_profiler->GetSnapshotCount());
CHECK_GT(aborting_control.total(), aborting_control.done());
TestActivityControl control(-1); // Don't abort.
const v8::HeapSnapshot* snapshot = heap_profiler->TakeHeapSnapshot(&control);
CHECK(ValidateSnapshot(snapshot));
CHECK(snapshot);
CHECK_EQ(snapshots_count + 1, heap_profiler->GetSnapshotCount());
CHECK_EQ(control.total(), control.done());
CHECK_GT(control.total(), 0);
}
namespace {
class TestRetainedObjectInfo : public v8::RetainedObjectInfo {
public:
TestRetainedObjectInfo(int hash,
const char* group_label,
const char* label,
intptr_t element_count = -1,
intptr_t size = -1)
: disposed_(false),
hash_(hash),
group_label_(group_label),
label_(label),
element_count_(element_count),
size_(size) {
instances.push_back(this);
}
virtual ~TestRetainedObjectInfo() {}
virtual void Dispose() {
CHECK(!disposed_);
disposed_ = true;
}
virtual bool IsEquivalent(RetainedObjectInfo* other) {
return GetHash() == other->GetHash();
}
virtual intptr_t GetHash() { return hash_; }
virtual const char* GetGroupLabel() { return group_label_; }
virtual const char* GetLabel() { return label_; }
virtual intptr_t GetElementCount() { return element_count_; }
virtual intptr_t GetSizeInBytes() { return size_; }
bool disposed() { return disposed_; }
static v8::RetainedObjectInfo* WrapperInfoCallback(
uint16_t class_id, v8::Local<v8::Value> wrapper) {
if (class_id == 1) {
if (wrapper->IsString()) {
v8::String::Utf8Value utf8(CcTest::isolate(), wrapper);
if (strcmp(*utf8, "AAA") == 0)
return new TestRetainedObjectInfo(1, "aaa-group", "aaa", 100);
else if (strcmp(*utf8, "BBB") == 0)
return new TestRetainedObjectInfo(1, "aaa-group", "aaa", 100);
}
} else if (class_id == 2) {
if (wrapper->IsString()) {
v8::String::Utf8Value utf8(CcTest::isolate(), wrapper);
if (strcmp(*utf8, "CCC") == 0)
return new TestRetainedObjectInfo(2, "ccc-group", "ccc");
}
}
UNREACHABLE();
}
static std::vector<TestRetainedObjectInfo*> instances;
private:
bool disposed_;
int hash_;
const char* group_label_;
const char* label_;
intptr_t element_count_;
intptr_t size_;
};
std::vector<TestRetainedObjectInfo*> TestRetainedObjectInfo::instances;
} // namespace
static const v8::HeapGraphNode* GetNode(const v8::HeapGraphNode* parent,
v8::HeapGraphNode::Type type,
const char* name) {
for (int i = 0, count = parent->GetChildrenCount(); i < count; ++i) {
const v8::HeapGraphNode* node = parent->GetChild(i)->GetToNode();
if (node->GetType() == type && strcmp(name,
const_cast<i::HeapEntry*>(
reinterpret_cast<const i::HeapEntry*>(node))->name()) == 0) {
return node;
}
}
return nullptr;
}
TEST(HeapSnapshotRetainedObjectInfo) {
LocalContext env;
v8::Isolate* isolate = env->GetIsolate();
v8::HandleScope scope(isolate);
v8::HeapProfiler* heap_profiler = isolate->GetHeapProfiler();
heap_profiler->SetWrapperClassInfoProvider(
1, TestRetainedObjectInfo::WrapperInfoCallback);
heap_profiler->SetWrapperClassInfoProvider(
2, TestRetainedObjectInfo::WrapperInfoCallback);
v8::Persistent<v8::String> p_AAA(isolate, v8_str("AAA"));
p_AAA.SetWrapperClassId(1);
v8::Persistent<v8::String> p_BBB(isolate, v8_str("BBB"));
p_BBB.SetWrapperClassId(1);
v8::Persistent<v8::String> p_CCC(isolate, v8_str("CCC"));
p_CCC.SetWrapperClassId(2);
CHECK(TestRetainedObjectInfo::instances.empty());
const v8::HeapSnapshot* snapshot = heap_profiler->TakeHeapSnapshot();
CHECK(ValidateSnapshot(snapshot));
CHECK_EQ(3, TestRetainedObjectInfo::instances.size());
for (TestRetainedObjectInfo* instance : TestRetainedObjectInfo::instances) {
CHECK(instance->disposed());
delete instance;
}
const v8::HeapGraphNode* native_group_aaa = GetNode(
snapshot->GetRoot(), v8::HeapGraphNode::kSynthetic, "aaa-group");
CHECK(native_group_aaa);
CHECK_EQ(1, native_group_aaa->GetChildrenCount());
const v8::HeapGraphNode* aaa = GetNode(
native_group_aaa, v8::HeapGraphNode::kNative, "aaa / 100 entries");
CHECK(aaa);
CHECK_EQ(2, aaa->GetChildrenCount());
const v8::HeapGraphNode* native_group_ccc = GetNode(
snapshot->GetRoot(), v8::HeapGraphNode::kSynthetic, "ccc-group");
const v8::HeapGraphNode* ccc = GetNode(
native_group_ccc, v8::HeapGraphNode::kNative, "ccc");
CHECK(ccc);
const v8::HeapGraphNode* n_AAA = GetNode(
aaa, v8::HeapGraphNode::kString, "AAA");
CHECK(n_AAA);
const v8::HeapGraphNode* n_BBB = GetNode(
aaa, v8::HeapGraphNode::kString, "BBB");
CHECK(n_BBB);
CHECK_EQ(1, ccc->GetChildrenCount());
const v8::HeapGraphNode* n_CCC = GetNode(
ccc, v8::HeapGraphNode::kString, "CCC");
CHECK(n_CCC);
CHECK_EQ(aaa, GetProperty(env->GetIsolate(), n_AAA,
v8::HeapGraphEdge::kInternal, "native"));
CHECK_EQ(aaa, GetProperty(env->GetIsolate(), n_BBB,
v8::HeapGraphEdge::kInternal, "native"));
CHECK_EQ(ccc, GetProperty(env->GetIsolate(), n_CCC,
v8::HeapGraphEdge::kInternal, "native"));
}
TEST(DeleteAllHeapSnapshots) {
LocalContext env;
v8::HandleScope scope(env->GetIsolate());
v8::HeapProfiler* heap_profiler = env->GetIsolate()->GetHeapProfiler();
CHECK_EQ(0, heap_profiler->GetSnapshotCount());
heap_profiler->DeleteAllHeapSnapshots();
CHECK_EQ(0, heap_profiler->GetSnapshotCount());
CHECK(heap_profiler->TakeHeapSnapshot());
CHECK_EQ(1, heap_profiler->GetSnapshotCount());
heap_profiler->DeleteAllHeapSnapshots();
CHECK_EQ(0, heap_profiler->GetSnapshotCount());
CHECK(heap_profiler->TakeHeapSnapshot());
CHECK(heap_profiler->TakeHeapSnapshot());
CHECK_EQ(2, heap_profiler->GetSnapshotCount());
heap_profiler->DeleteAllHeapSnapshots();
CHECK_EQ(0, heap_profiler->GetSnapshotCount());
}
static bool FindHeapSnapshot(v8::HeapProfiler* profiler,
const v8::HeapSnapshot* snapshot) {
int length = profiler->GetSnapshotCount();
for (int i = 0; i < length; i++) {
if (snapshot == profiler->GetHeapSnapshot(i)) return true;
}
return false;
}
TEST(DeleteHeapSnapshot) {
LocalContext env;
v8::HandleScope scope(env->GetIsolate());
v8::HeapProfiler* heap_profiler = env->GetIsolate()->GetHeapProfiler();
CHECK_EQ(0, heap_profiler->GetSnapshotCount());
const v8::HeapSnapshot* s1 = heap_profiler->TakeHeapSnapshot();
CHECK(s1);
CHECK_EQ(1, heap_profiler->GetSnapshotCount());
CHECK(FindHeapSnapshot(heap_profiler, s1));
const_cast<v8::HeapSnapshot*>(s1)->Delete();
CHECK_EQ(0, heap_profiler->GetSnapshotCount());
CHECK(!FindHeapSnapshot(heap_profiler, s1));
const v8::HeapSnapshot* s2 = heap_profiler->TakeHeapSnapshot();
CHECK(s2);
CHECK_EQ(1, heap_profiler->GetSnapshotCount());
CHECK(FindHeapSnapshot(heap_profiler, s2));
const v8::HeapSnapshot* s3 = heap_profiler->TakeHeapSnapshot();
CHECK(s3);
CHECK_EQ(2, heap_profiler->GetSnapshotCount());
CHECK_NE(s2, s3);
CHECK(FindHeapSnapshot(heap_profiler, s3));
const_cast<v8::HeapSnapshot*>(s2)->Delete();
CHECK_EQ(1, heap_profiler->GetSnapshotCount());
CHECK(!FindHeapSnapshot(heap_profiler, s2));
CHECK(FindHeapSnapshot(heap_profiler, s3));
const_cast<v8::HeapSnapshot*>(s3)->Delete();
CHECK_EQ(0, heap_profiler->GetSnapshotCount());
CHECK(!FindHeapSnapshot(heap_profiler, s3));
}
class NameResolver : public v8::HeapProfiler::ObjectNameResolver {
public:
virtual const char* GetName(v8::Local<v8::Object> object) {
return "Global object name";
}
};
TEST(GlobalObjectName) {
LocalContext env;
v8::HandleScope scope(env->GetIsolate());
v8::HeapProfiler* heap_profiler = env->GetIsolate()->GetHeapProfiler();
CompileRun("document = { URL:\"abcdefgh\" };");
NameResolver name_resolver;
const v8::HeapSnapshot* snapshot =
heap_profiler->TakeHeapSnapshot(nullptr, &name_resolver);
CHECK(ValidateSnapshot(snapshot));
const v8::HeapGraphNode* global = GetGlobalObject(snapshot);
CHECK(global);
CHECK_EQ(0,
strcmp("Object / Global object name",
const_cast<i::HeapEntry*>(
reinterpret_cast<const i::HeapEntry*>(global))->name()));
}
TEST(GlobalObjectFields) {
LocalContext env;
v8::HandleScope scope(env->GetIsolate());
v8::HeapProfiler* heap_profiler = env->GetIsolate()->GetHeapProfiler();
CompileRun("obj = {};");
const v8::HeapSnapshot* snapshot = heap_profiler->TakeHeapSnapshot();
CHECK(ValidateSnapshot(snapshot));
const v8::HeapGraphNode* global = GetGlobalObject(snapshot);
const v8::HeapGraphNode* native_context =
GetProperty(env->GetIsolate(), global, v8::HeapGraphEdge::kInternal,
"native_context");
CHECK(native_context);
const v8::HeapGraphNode* global_proxy = GetProperty(
env->GetIsolate(), global, v8::HeapGraphEdge::kInternal, "global_proxy");
CHECK(global_proxy);
}
TEST(NoHandleLeaks) {
LocalContext env;
v8::HandleScope scope(env->GetIsolate());
v8::HeapProfiler* heap_profiler = env->GetIsolate()->GetHeapProfiler();
CompileRun("document = { URL:\"abcdefgh\" };");
i::Isolate* isolate = CcTest::i_isolate();
int count_before = i::HandleScope::NumberOfHandles(isolate);
heap_profiler->TakeHeapSnapshot();
int count_after = i::HandleScope::NumberOfHandles(isolate);
CHECK_EQ(count_before, count_after);
}
TEST(NodesIteration) {
LocalContext env;
v8::HandleScope scope(env->GetIsolate());
v8::HeapProfiler* heap_profiler = env->GetIsolate()->GetHeapProfiler();
const v8::HeapSnapshot* snapshot = heap_profiler->TakeHeapSnapshot();
CHECK(ValidateSnapshot(snapshot));
const v8::HeapGraphNode* global = GetGlobalObject(snapshot);
CHECK(global);
// Verify that we can find this object by iteration.
const int nodes_count = snapshot->GetNodesCount();
int count = 0;
for (int i = 0; i < nodes_count; ++i) {
if (snapshot->GetNode(i) == global)
++count;
}
CHECK_EQ(1, count);
}
TEST(GetHeapValueForNode) {
LocalContext env;
v8::HandleScope scope(env->GetIsolate());
v8::HeapProfiler* heap_profiler = env->GetIsolate()->GetHeapProfiler();
CompileRun("a = { s_prop: \'value\', n_prop: \'value2\' };");
const v8::HeapSnapshot* snapshot = heap_profiler->TakeHeapSnapshot();
CHECK(ValidateSnapshot(snapshot));
const v8::HeapGraphNode* global = GetGlobalObject(snapshot);
CHECK(heap_profiler->FindObjectById(global->GetId())->IsObject());
v8::Local<v8::Object> js_global =
env->Global()->GetPrototype().As<v8::Object>();
CHECK(js_global == heap_profiler->FindObjectById(global->GetId()));
const v8::HeapGraphNode* obj =
GetProperty(env->GetIsolate(), global, v8::HeapGraphEdge::kProperty, "a");
CHECK(heap_profiler->FindObjectById(obj->GetId())->IsObject());
v8::Local<v8::Object> js_obj = js_global->Get(env.local(), v8_str("a"))
.ToLocalChecked()
.As<v8::Object>();
CHECK(js_obj == heap_profiler->FindObjectById(obj->GetId()));
const v8::HeapGraphNode* s_prop = GetProperty(
env->GetIsolate(), obj, v8::HeapGraphEdge::kProperty, "s_prop");
v8::Local<v8::String> js_s_prop = js_obj->Get(env.local(), v8_str("s_prop"))
.ToLocalChecked()
.As<v8::String>();
CHECK(js_s_prop == heap_profiler->FindObjectById(s_prop->GetId()));
const v8::HeapGraphNode* n_prop = GetProperty(
env->GetIsolate(), obj, v8::HeapGraphEdge::kProperty, "n_prop");
v8::Local<v8::String> js_n_prop = js_obj->Get(env.local(), v8_str("n_prop"))
.ToLocalChecked()
.As<v8::String>();
CHECK(js_n_prop == heap_profiler->FindObjectById(n_prop->GetId()));
}
TEST(GetHeapValueForDeletedObject) {
LocalContext env;
v8::HandleScope scope(env->GetIsolate());
v8::HeapProfiler* heap_profiler = env->GetIsolate()->GetHeapProfiler();
// It is impossible to delete a global property, so we are about to delete a
// property of the "a" object. Also, the "p" object can't be an empty one
// because the empty object is static and isn't actually deleted.
CompileRun("a = { p: { r: {} } };");
const v8::HeapSnapshot* snapshot = heap_profiler->TakeHeapSnapshot();
CHECK(ValidateSnapshot(snapshot));
const v8::HeapGraphNode* global = GetGlobalObject(snapshot);
const v8::HeapGraphNode* obj =
GetProperty(env->GetIsolate(), global, v8::HeapGraphEdge::kProperty, "a");
const v8::HeapGraphNode* prop =
GetProperty(env->GetIsolate(), obj, v8::HeapGraphEdge::kProperty, "p");
{
// Perform the check inside a nested local scope to avoid creating a
// reference to the object we are deleting.
v8::HandleScope scope(env->GetIsolate());
CHECK(heap_profiler->FindObjectById(prop->GetId())->IsObject());
}
CompileRun("delete a.p;");
CHECK(heap_profiler->FindObjectById(prop->GetId()).IsEmpty());
}
static int StringCmp(const char* ref, i::String* act) {
std::unique_ptr<char[]> s_act = act->ToCString();
int result = strcmp(ref, s_act.get());
if (result != 0)
fprintf(stderr, "Expected: \"%s\", Actual: \"%s\"\n", ref, s_act.get());
return result;
}
TEST(GetConstructorName) {
LocalContext env;
v8::HandleScope scope(env->GetIsolate());
CompileRun(
"function Constructor1() {};\n"
"var obj1 = new Constructor1();\n"
"var Constructor2 = function() {};\n"
"var obj2 = new Constructor2();\n"
"var obj3 = {};\n"
"obj3.__proto__ = { constructor: function Constructor3() {} };\n"
"var obj4 = {};\n"
"// Slow properties\n"
"for (var i=0; i<2000; ++i) obj4[\"p\" + i] = i;\n"
"obj4.__proto__ = { constructor: function Constructor4() {} };\n"
"var obj5 = {};\n"
"var obj6 = {};\n"
"obj6.constructor = 6;");
v8::Local<v8::Object> js_global =
env->Global()->GetPrototype().As<v8::Object>();
v8::Local<v8::Object> obj1 = js_global->Get(env.local(), v8_str("obj1"))
.ToLocalChecked()
.As<v8::Object>();
i::Handle<i::JSObject> js_obj1 =
i::Handle<i::JSObject>::cast(v8::Utils::OpenHandle(*obj1));
CHECK_EQ(0, StringCmp(
"Constructor1", i::V8HeapExplorer::GetConstructorName(*js_obj1)));
v8::Local<v8::Object> obj2 = js_global->Get(env.local(), v8_str("obj2"))
.ToLocalChecked()
.As<v8::Object>();
i::Handle<i::JSObject> js_obj2 =
i::Handle<i::JSObject>::cast(v8::Utils::OpenHandle(*obj2));
CHECK_EQ(0, StringCmp(
"Constructor2", i::V8HeapExplorer::GetConstructorName(*js_obj2)));
v8::Local<v8::Object> obj3 = js_global->Get(env.local(), v8_str("obj3"))
.ToLocalChecked()
.As<v8::Object>();
i::Handle<i::JSObject> js_obj3 =
i::Handle<i::JSObject>::cast(v8::Utils::OpenHandle(*obj3));
CHECK_EQ(0, StringCmp("Constructor3",
i::V8HeapExplorer::GetConstructorName(*js_obj3)));
v8::Local<v8::Object> obj4 = js_global->Get(env.local(), v8_str("obj4"))
.ToLocalChecked()
.As<v8::Object>();
i::Handle<i::JSObject> js_obj4 =
i::Handle<i::JSObject>::cast(v8::Utils::OpenHandle(*obj4));
CHECK_EQ(0, StringCmp("Constructor4",
i::V8HeapExplorer::GetConstructorName(*js_obj4)));
v8::Local<v8::Object> obj5 = js_global->Get(env.local(), v8_str("obj5"))
.ToLocalChecked()
.As<v8::Object>();
i::Handle<i::JSObject> js_obj5 =
i::Handle<i::JSObject>::cast(v8::Utils::OpenHandle(*obj5));
CHECK_EQ(0, StringCmp(
"Object", i::V8HeapExplorer::GetConstructorName(*js_obj5)));
v8::Local<v8::Object> obj6 = js_global->Get(env.local(), v8_str("obj6"))
.ToLocalChecked()
.As<v8::Object>();
i::Handle<i::JSObject> js_obj6 =
i::Handle<i::JSObject>::cast(v8::Utils::OpenHandle(*obj6));
CHECK_EQ(0, StringCmp(
"Object", i::V8HeapExplorer::GetConstructorName(*js_obj6)));
}
TEST(FastCaseAccessors) {
LocalContext env;
v8::HandleScope scope(env->GetIsolate());
v8::HeapProfiler* heap_profiler = env->GetIsolate()->GetHeapProfiler();
CompileRun("var obj1 = {};\n"
"obj1.__defineGetter__('propWithGetter', function Y() {\n"
" return 42;\n"
"});\n"
"obj1.__defineSetter__('propWithSetter', function Z(value) {\n"
" return this.value_ = value;\n"
"});\n");
const v8::HeapSnapshot* snapshot = heap_profiler->TakeHeapSnapshot();
CHECK(ValidateSnapshot(snapshot));
const v8::HeapGraphNode* global = GetGlobalObject(snapshot);
CHECK(global);
const v8::HeapGraphNode* obj1 = GetProperty(
env->GetIsolate(), global, v8::HeapGraphEdge::kProperty, "obj1");
CHECK(obj1);
const v8::HeapGraphNode* func;
func = GetProperty(env->GetIsolate(), obj1, v8::HeapGraphEdge::kProperty,
"get propWithGetter");
CHECK(func);
func = GetProperty(env->GetIsolate(), obj1, v8::HeapGraphEdge::kProperty,
"set propWithGetter");
CHECK(!func);
func = GetProperty(env->GetIsolate(), obj1, v8::HeapGraphEdge::kProperty,
"set propWithSetter");
CHECK(func);
func = GetProperty(env->GetIsolate(), obj1, v8::HeapGraphEdge::kProperty,
"get propWithSetter");
CHECK(!func);
}
TEST(FastCaseRedefinedAccessors) {
LocalContext env;
v8::HandleScope scope(env->GetIsolate());
v8::HeapProfiler* heap_profiler = env->GetIsolate()->GetHeapProfiler();
CompileRun(
"var obj1 = {};\n"
"Object.defineProperty(obj1, 'prop', { "
" get: function() { return 42; },\n"
" set: function(value) { return this.prop_ = value; },\n"
" configurable: true,\n"
" enumerable: true,\n"
"});\n"
"Object.defineProperty(obj1, 'prop', { "
" get: function() { return 153; },\n"
" set: function(value) { return this.prop_ = value; },\n"
" configurable: true,\n"
" enumerable: true,\n"
"});\n");
v8::Local<v8::Object> js_global =
env->Global()->GetPrototype().As<v8::Object>();
i::Handle<i::JSReceiver> js_obj1 =
v8::Utils::OpenHandle(*js_global->Get(env.local(), v8_str("obj1"))
.ToLocalChecked()
.As<v8::Object>());
USE(js_obj1);
const v8::HeapSnapshot* snapshot = heap_profiler->TakeHeapSnapshot();
CHECK(ValidateSnapshot(snapshot));
const v8::HeapGraphNode* global = GetGlobalObject(snapshot);
CHECK(global);
const v8::HeapGraphNode* obj1 = GetProperty(
env->GetIsolate(), global, v8::HeapGraphEdge::kProperty, "obj1");
CHECK(obj1);
const v8::HeapGraphNode* func;
func = GetProperty(env->GetIsolate(), obj1, v8::HeapGraphEdge::kProperty,
"get prop");
CHECK(func);
func = GetProperty(env->GetIsolate(), obj1, v8::HeapGraphEdge::kProperty,
"set prop");
CHECK(func);
}
TEST(SlowCaseAccessors) {
LocalContext env;
v8::HandleScope scope(env->GetIsolate());
v8::HeapProfiler* heap_profiler = env->GetIsolate()->GetHeapProfiler();
CompileRun("var obj1 = {};\n"
"for (var i = 0; i < 100; ++i) obj1['z' + i] = {};"
"obj1.__defineGetter__('propWithGetter', function Y() {\n"
" return 42;\n"
"});\n"
"obj1.__defineSetter__('propWithSetter', function Z(value) {\n"
" return this.value_ = value;\n"
"});\n");
const v8::HeapSnapshot* snapshot = heap_profiler->TakeHeapSnapshot();
CHECK(ValidateSnapshot(snapshot));
const v8::HeapGraphNode* global = GetGlobalObject(snapshot);
CHECK(global);
const v8::HeapGraphNode* obj1 = GetProperty(
env->GetIsolate(), global, v8::HeapGraphEdge::kProperty, "obj1");
CHECK(obj1);
const v8::HeapGraphNode* func;
func = GetProperty(env->GetIsolate(), obj1, v8::HeapGraphEdge::kProperty,
"get propWithGetter");
CHECK(func);
func = GetProperty(env->GetIsolate(), obj1, v8::HeapGraphEdge::kProperty,
"set propWithGetter");
CHECK(!func);
func = GetProperty(env->GetIsolate(), obj1, v8::HeapGraphEdge::kProperty,
"set propWithSetter");
CHECK(func);
func = GetProperty(env->GetIsolate(), obj1, v8::HeapGraphEdge::kProperty,
"get propWithSetter");
CHECK(!func);
}
TEST(HiddenPropertiesFastCase) {
v8::Isolate* isolate = CcTest::isolate();
LocalContext env;
v8::HandleScope scope(isolate);
v8::HeapProfiler* heap_profiler = isolate->GetHeapProfiler();
CompileRun(
"function C(x) { this.a = this; this.b = x; }\n"
"c = new C(2012);\n");
const v8::HeapSnapshot* snapshot = heap_profiler->TakeHeapSnapshot();
CHECK(ValidateSnapshot(snapshot));
const v8::HeapGraphNode* global = GetGlobalObject(snapshot);
const v8::HeapGraphNode* c =
GetProperty(isolate, global, v8::HeapGraphEdge::kProperty, "c");
CHECK(c);
const v8::HeapGraphNode* hidden_props =
GetProperty(isolate, global, v8::HeapGraphEdge::kProperty, "<symbol>");
CHECK(!hidden_props);
v8::Local<v8::Value> cHandle =
env->Global()->Get(env.local(), v8_str("c")).ToLocalChecked();
CHECK(!cHandle.IsEmpty() && cHandle->IsObject());
cHandle->ToObject(env.local())
.ToLocalChecked()
->SetPrivate(env.local(),
v8::Private::ForApi(env->GetIsolate(), v8_str("key")),
v8_str("val"))
.FromJust();
snapshot = heap_profiler->TakeHeapSnapshot();
CHECK(ValidateSnapshot(snapshot));
global = GetGlobalObject(snapshot);
c = GetProperty(isolate, global, v8::HeapGraphEdge::kProperty, "c");
CHECK(c);
hidden_props =
GetProperty(isolate, c, v8::HeapGraphEdge::kProperty, "<symbol>");
CHECK(hidden_props);
}
TEST(AccessorInfo) {
LocalContext env;
v8::HandleScope scope(env->GetIsolate());
v8::HeapProfiler* heap_profiler = env->GetIsolate()->GetHeapProfiler();
CompileRun("function foo(x) { }\n");
const v8::HeapSnapshot* snapshot = heap_profiler->TakeHeapSnapshot();
CHECK(ValidateSnapshot(snapshot));
const v8::HeapGraphNode* global = GetGlobalObject(snapshot);
const v8::HeapGraphNode* foo = GetProperty(
env->GetIsolate(), global, v8::HeapGraphEdge::kProperty, "foo");
CHECK(foo);
const v8::HeapGraphNode* map =
GetProperty(env->GetIsolate(), foo, v8::HeapGraphEdge::kInternal, "map");
CHECK(map);
const v8::HeapGraphNode* descriptors = GetProperty(
env->GetIsolate(), map, v8::HeapGraphEdge::kInternal, "descriptors");
CHECK(descriptors);
const v8::HeapGraphNode* length_name = GetProperty(
env->GetIsolate(), descriptors, v8::HeapGraphEdge::kInternal, "2");
CHECK(length_name);
CHECK_EQ(0, strcmp("length", *v8::String::Utf8Value(env->GetIsolate(),
length_name->GetName())));
const v8::HeapGraphNode* length_accessor = GetProperty(
env->GetIsolate(), descriptors, v8::HeapGraphEdge::kInternal, "4");
CHECK(length_accessor);
CHECK_EQ(0, strcmp("system / AccessorInfo",
*v8::String::Utf8Value(env->GetIsolate(),
length_accessor->GetName())));
const v8::HeapGraphNode* name = GetProperty(
env->GetIsolate(), length_accessor, v8::HeapGraphEdge::kInternal, "name");
CHECK(name);
const v8::HeapGraphNode* getter =
GetProperty(env->GetIsolate(), length_accessor,
v8::HeapGraphEdge::kInternal, "getter");
CHECK(getter);
const v8::HeapGraphNode* setter =
GetProperty(env->GetIsolate(), length_accessor,
v8::HeapGraphEdge::kInternal, "setter");
CHECK(setter);
}
bool HasWeakEdge(const v8::HeapGraphNode* node) {
for (int i = 0; i < node->GetChildrenCount(); ++i) {
const v8::HeapGraphEdge* handle_edge = node->GetChild(i);
if (handle_edge->GetType() == v8::HeapGraphEdge::kWeak) return true;
}
return false;
}
bool HasWeakGlobalHandle() {
v8::Isolate* isolate = CcTest::isolate();
v8::HeapProfiler* heap_profiler = isolate->GetHeapProfiler();
const v8::HeapSnapshot* snapshot = heap_profiler->TakeHeapSnapshot();
CHECK(ValidateSnapshot(snapshot));
const v8::HeapGraphNode* gc_roots = GetNode(
snapshot->GetRoot(), v8::HeapGraphNode::kSynthetic, "(GC roots)");
CHECK(gc_roots);
const v8::HeapGraphNode* global_handles = GetNode(
gc_roots, v8::HeapGraphNode::kSynthetic, "(Global handles)");
CHECK(global_handles);
return HasWeakEdge(global_handles);
}
static void PersistentHandleCallback(
const v8::WeakCallbackInfo<v8::Persistent<v8::Object> >& data) {
data.GetParameter()->Reset();
}
TEST(WeakGlobalHandle) {
LocalContext env;
v8::HandleScope scope(env->GetIsolate());
CHECK(!HasWeakGlobalHandle());
v8::Persistent<v8::Object> handle;
handle.Reset(env->GetIsolate(), v8::Object::New(env->GetIsolate()));
handle.SetWeak(&handle, PersistentHandleCallback,
v8::WeakCallbackType::kParameter);
CHECK(HasWeakGlobalHandle());
CcTest::CollectAllGarbage();
EmptyMessageQueues(env->GetIsolate());
}
TEST(SfiAndJsFunctionWeakRefs) {
LocalContext env;
v8::HandleScope scope(env->GetIsolate());
v8::HeapProfiler* heap_profiler = env->GetIsolate()->GetHeapProfiler();
CompileRun(
"fun = (function (x) { return function () { return x + 1; } })(1);");
const v8::HeapSnapshot* snapshot = heap_profiler->TakeHeapSnapshot();
CHECK(ValidateSnapshot(snapshot));
const v8::HeapGraphNode* global = GetGlobalObject(snapshot);
CHECK(global);
const v8::HeapGraphNode* fun = GetProperty(
env->GetIsolate(), global, v8::HeapGraphEdge::kProperty, "fun");
CHECK(!HasWeakEdge(fun));
const v8::HeapGraphNode* shared = GetProperty(
env->GetIsolate(), fun, v8::HeapGraphEdge::kInternal, "shared");
CHECK(!HasWeakEdge(shared));
}
TEST(NoDebugObjectInSnapshot) {
LocalContext env;
v8::HandleScope scope(env->GetIsolate());
v8::HeapProfiler* heap_profiler = env->GetIsolate()->GetHeapProfiler();
CHECK(CcTest::i_isolate()->debug()->Load());
CompileRun("foo = {};");
const v8::HeapSnapshot* snapshot = heap_profiler->TakeHeapSnapshot();
CHECK(ValidateSnapshot(snapshot));
const v8::HeapGraphNode* root = snapshot->GetRoot();
int globals_count = 0;
for (int i = 0; i < root->GetChildrenCount(); ++i) {
const v8::HeapGraphEdge* edge = root->GetChild(i);
if (edge->GetType() == v8::HeapGraphEdge::kShortcut) {
++globals_count;
const v8::HeapGraphNode* global = edge->GetToNode();
const v8::HeapGraphNode* foo = GetProperty(
env->GetIsolate(), global, v8::HeapGraphEdge::kProperty, "foo");
CHECK(foo);
}
}
CHECK_EQ(1, globals_count);
}
TEST(AllStrongGcRootsHaveNames) {
LocalContext env;
v8::HandleScope scope(env->GetIsolate());
v8::HeapProfiler* heap_profiler = env->GetIsolate()->GetHeapProfiler();
CompileRun("foo = {};");
const v8::HeapSnapshot* snapshot = heap_profiler->TakeHeapSnapshot();
CHECK(ValidateSnapshot(snapshot));
const v8::HeapGraphNode* gc_roots = GetNode(
snapshot->GetRoot(), v8::HeapGraphNode::kSynthetic, "(GC roots)");
CHECK(gc_roots);
const v8::HeapGraphNode* strong_roots = GetNode(
gc_roots, v8::HeapGraphNode::kSynthetic, "(Strong roots)");
CHECK(strong_roots);
for (int i = 0; i < strong_roots->GetChildrenCount(); ++i) {
const v8::HeapGraphEdge* edge = strong_roots->GetChild(i);
CHECK_EQ(v8::HeapGraphEdge::kInternal, edge->GetType());
v8::String::Utf8Value name(env->GetIsolate(), edge->GetName());
CHECK(isalpha(**name));
}
}
TEST(NoRefsToNonEssentialEntries) {
LocalContext env;
v8::HandleScope scope(env->GetIsolate());
v8::HeapProfiler* heap_profiler = env->GetIsolate()->GetHeapProfiler();
CompileRun("global_object = {};\n");
const v8::HeapSnapshot* snapshot = heap_profiler->TakeHeapSnapshot();
CHECK(ValidateSnapshot(snapshot));
const v8::HeapGraphNode* global = GetGlobalObject(snapshot);
const v8::HeapGraphNode* global_object = GetProperty(
env->GetIsolate(), global, v8::HeapGraphEdge::kProperty, "global_object");
CHECK(global_object);
const v8::HeapGraphNode* properties =
GetProperty(env->GetIsolate(), global_object,
v8::HeapGraphEdge::kInternal, "properties");
CHECK(!properties);
const v8::HeapGraphNode* elements =
GetProperty(env->GetIsolate(), global_object,
v8::HeapGraphEdge::kInternal, "elements");
CHECK(!elements);
}
TEST(MapHasDescriptorsAndTransitions) {
LocalContext env;
v8::HandleScope scope(env->GetIsolate());
v8::HeapProfiler* heap_profiler = env->GetIsolate()->GetHeapProfiler();
CompileRun("obj = { a: 10 };\n");
const v8::HeapSnapshot* snapshot = heap_profiler->TakeHeapSnapshot();
CHECK(ValidateSnapshot(snapshot));
const v8::HeapGraphNode* global = GetGlobalObject(snapshot);
const v8::HeapGraphNode* global_object = GetProperty(
env->GetIsolate(), global, v8::HeapGraphEdge::kProperty, "obj");
CHECK(global_object);
const v8::HeapGraphNode* map = GetProperty(
env->GetIsolate(), global_object, v8::HeapGraphEdge::kInternal, "map");
CHECK(map);
const v8::HeapGraphNode* own_descriptors = GetProperty(
env->GetIsolate(), map, v8::HeapGraphEdge::kInternal, "descriptors");
CHECK(own_descriptors);
const v8::HeapGraphNode* own_transitions = GetProperty(
env->GetIsolate(), map, v8::HeapGraphEdge::kInternal, "transitions");
CHECK(!own_transitions);
}
TEST(ManyLocalsInSharedContext) {
LocalContext env;
v8::HandleScope scope(env->GetIsolate());
v8::HeapProfiler* heap_profiler = env->GetIsolate()->GetHeapProfiler();
int num_objects = 6000;
CompileRun(
"var n = 6000;"
"var result = [];"
"result.push('(function outer() {');"
"for (var i = 0; i < n; i++) {"
" var f = 'function f_' + i + '() { ';"
" if (i > 0)"
" f += 'f_' + (i - 1) + '();';"
" f += ' }';"
" result.push(f);"
"}"
"result.push('return f_' + (n - 1) + ';');"
"result.push('})()');"
"var ok = eval(result.join('\\n'));");
const v8::HeapSnapshot* snapshot = heap_profiler->TakeHeapSnapshot();
CHECK(ValidateSnapshot(snapshot));
const v8::HeapGraphNode* global = GetGlobalObject(snapshot);
CHECK(global);
const v8::HeapGraphNode* ok_object = GetProperty(
env->GetIsolate(), global, v8::HeapGraphEdge::kProperty, "ok");
CHECK(ok_object);
const v8::HeapGraphNode* context_object = GetProperty(
env->GetIsolate(), ok_object, v8::HeapGraphEdge::kInternal, "context");
CHECK(context_object);
// Check the objects are not duplicated in the context.
CHECK_EQ(v8::internal::Context::MIN_CONTEXT_SLOTS + num_objects - 1,
context_object->GetChildrenCount());
// Check all the objects have got their names.
// ... well check just every 15th because otherwise it's too slow in debug.
for (int i = 0; i < num_objects - 1; i += 15) {
i::EmbeddedVector<char, 100> var_name;
i::SNPrintF(var_name, "f_%d", i);
const v8::HeapGraphNode* f_object =
GetProperty(env->GetIsolate(), context_object,
v8::HeapGraphEdge::kContextVariable, var_name.start());
CHECK(f_object);
}
}
TEST(AllocationSitesAreVisible) {
LocalContext env;
v8::Isolate* isolate = env->GetIsolate();
v8::HandleScope scope(isolate);
v8::HeapProfiler* heap_profiler = isolate->GetHeapProfiler();
CompileRun(
"fun = function () { var a = [3, 2, 1]; return a; }\n"
"fun();");
const v8::HeapSnapshot* snapshot = heap_profiler->TakeHeapSnapshot();
CHECK(ValidateSnapshot(snapshot));
const v8::HeapGraphNode* global = GetGlobalObject(snapshot);
CHECK(global);
const v8::HeapGraphNode* fun_code = GetProperty(
env->GetIsolate(), global, v8::HeapGraphEdge::kProperty, "fun");
CHECK(fun_code);
const v8::HeapGraphNode* vector_cell =
GetProperty(env->GetIsolate(), fun_code, v8::HeapGraphEdge::kInternal,
"feedback_vector_cell");
// TODO(mvstanton): I'm not sure if this is the best way to expose
// literals. Is it too much to expose the Cell?
CHECK(vector_cell);
const v8::HeapGraphNode* vector = GetProperty(
env->GetIsolate(), vector_cell, v8::HeapGraphEdge::kInternal, "value");
CHECK_EQ(v8::HeapGraphNode::kArray, vector->GetType());
CHECK_EQ(3, vector->GetChildrenCount());
// The first value in the feedback vector should be the boilerplate,
// after an AllocationSite.
const v8::HeapGraphEdge* prop = vector->GetChild(2);
const v8::HeapGraphNode* allocation_site = prop->GetToNode();
v8::String::Utf8Value name(env->GetIsolate(), allocation_site->GetName());
CHECK_EQ(0, strcmp("system / AllocationSite", *name));
const v8::HeapGraphNode* transition_info =
GetProperty(env->GetIsolate(), allocation_site,
v8::HeapGraphEdge::kInternal, "transition_info");
CHECK(transition_info);
const v8::HeapGraphNode* elements =
GetProperty(env->GetIsolate(), transition_info,
v8::HeapGraphEdge::kInternal, "elements");
CHECK(elements);
CHECK_EQ(v8::HeapGraphNode::kArray, elements->GetType());
CHECK_EQ(v8::internal::FixedArray::SizeFor(3),
static_cast<int>(elements->GetShallowSize()));
v8::Local<v8::Value> array_val =
heap_profiler->FindObjectById(transition_info->GetId());
CHECK(array_val->IsArray());
v8::Local<v8::Array> array = v8::Local<v8::Array>::Cast(array_val);
// Verify the array is "a" in the code above.
CHECK_EQ(3u, array->Length());
CHECK(v8::Integer::New(isolate, 3)
->Equals(env.local(),
array->Get(env.local(), v8::Integer::New(isolate, 0))
.ToLocalChecked())
.FromJust());
CHECK(v8::Integer::New(isolate, 2)
->Equals(env.local(),
array->Get(env.local(), v8::Integer::New(isolate, 1))
.ToLocalChecked())
.FromJust());
CHECK(v8::Integer::New(isolate, 1)
->Equals(env.local(),
array->Get(env.local(), v8::Integer::New(isolate, 2))
.ToLocalChecked())
.FromJust());
}
TEST(JSFunctionHasCodeLink) {
LocalContext env;
v8::HandleScope scope(env->GetIsolate());
v8::HeapProfiler* heap_profiler = env->GetIsolate()->GetHeapProfiler();
CompileRun("function foo(x, y) { return x + y; }\n");
const v8::HeapSnapshot* snapshot = heap_profiler->TakeHeapSnapshot();
CHECK(ValidateSnapshot(snapshot));
const v8::HeapGraphNode* global = GetGlobalObject(snapshot);
const v8::HeapGraphNode* foo_func = GetProperty(
env->GetIsolate(), global, v8::HeapGraphEdge::kProperty, "foo");
CHECK(foo_func);
const v8::HeapGraphNode* code = GetProperty(
env->GetIsolate(), foo_func, v8::HeapGraphEdge::kInternal, "code");
CHECK(code);
}
static const v8::HeapGraphNode* GetNodeByPath(v8::Isolate* isolate,
const v8::HeapSnapshot* snapshot,
const char* path[], int depth) {
const v8::HeapGraphNode* node = snapshot->GetRoot();
for (int current_depth = 0; current_depth < depth; ++current_depth) {
int i, count = node->GetChildrenCount();
for (i = 0; i < count; ++i) {
const v8::HeapGraphEdge* edge = node->GetChild(i);
const v8::HeapGraphNode* to_node = edge->GetToNode();
v8::String::Utf8Value edge_name(isolate, edge->GetName());
v8::String::Utf8Value node_name(isolate, to_node->GetName());
i::EmbeddedVector<char, 100> name;
i::SNPrintF(name, "%s::%s", *edge_name, *node_name);
if (strstr(name.start(), path[current_depth])) {
node = to_node;
break;
}
}
if (i == count) return nullptr;
}
return node;
}
TEST(CheckCodeNames) {
LocalContext env;
v8::HandleScope scope(env->GetIsolate());
v8::HeapProfiler* heap_profiler = env->GetIsolate()->GetHeapProfiler();
CompileRun("var a = 1.1;");
const v8::HeapSnapshot* snapshot = heap_profiler->TakeHeapSnapshot();
CHECK(ValidateSnapshot(snapshot));
const char* stub_path[] = {
"::(GC roots)",
"::(Strong roots)",
"code_stubs::",
"::(ArraySingleArgumentConstructorStub code)"
};
const v8::HeapGraphNode* node = GetNodeByPath(
env->GetIsolate(), snapshot, stub_path, arraysize(stub_path));
CHECK(node);
const char* builtin_path1[] = {"::(GC roots)", "::(Builtins)",
"::(KeyedLoadIC_Slow builtin)"};
node = GetNodeByPath(env->GetIsolate(), snapshot, builtin_path1,
arraysize(builtin_path1));
CHECK(node);
const char* builtin_path2[] = {"::(GC roots)", "::(Builtins)",
"::(CompileLazy builtin)"};
node = GetNodeByPath(env->GetIsolate(), snapshot, builtin_path2,
arraysize(builtin_path2));
CHECK(node);
v8::String::Utf8Value node_name(env->GetIsolate(), node->GetName());
CHECK_EQ(0, strcmp("(CompileLazy builtin)", *node_name));
}
static const char* record_trace_tree_source =
"var topFunctions = [];\n"
"var global = this;\n"
"function generateFunctions(width, depth) {\n"
" var script = [];\n"
" for (var i = 0; i < width; i++) {\n"
" for (var j = 0; j < depth; j++) {\n"
" script.push('function f_' + i + '_' + j + '(x) {\\n');\n"
" script.push(' try {\\n');\n"
" if (j < depth-2) {\n"
" script.push(' return f_' + i + '_' + (j+1) + '(x+1);\\n');\n"
" } else if (j == depth - 2) {\n"
" script.push(' return new f_' + i + '_' + (depth - 1) + '();\\n');\n"
" } else if (j == depth - 1) {\n"
" script.push(' this.ts = Date.now();\\n');\n"
" }\n"
" script.push(' } catch (e) {}\\n');\n"
" script.push('}\\n');\n"
" \n"
" }\n"
" }\n"
" var script = script.join('');\n"
" // throw script;\n"
" global.eval(script);\n"
" for (var i = 0; i < width; i++) {\n"
" topFunctions.push(this['f_' + i + '_0']);\n"
" }\n"
"}\n"
"\n"
"var width = 3;\n"
"var depth = 3;\n"
"generateFunctions(width, depth);\n"
"var instances = [];\n"
"function start() {\n"
" for (var i = 0; i < width; i++) {\n"
" instances.push(topFunctions[i](0));\n"
" }\n"
"}\n"
"\n"
"for (var i = 0; i < 100; i++) start();\n";
static AllocationTraceNode* FindNode(
AllocationTracker* tracker, const Vector<const char*>& names) {
AllocationTraceNode* node = tracker->trace_tree()->root();
for (int i = 0; node != nullptr && i < names.length(); i++) {
const char* name = names[i];
const std::vector<AllocationTraceNode*>& children = node->children();
node = nullptr;
for (AllocationTraceNode* child : children) {
unsigned index = child->function_info_index();
AllocationTracker::FunctionInfo* info =
tracker->function_info_list()[index];
if (info && strcmp(info->name, name) == 0) {
node = child;
break;
}
}
}
return node;
}
TEST(ArrayGrowLeftTrim) {
LocalContext env;
v8::HandleScope scope(env->GetIsolate());
v8::HeapProfiler* heap_profiler = env->GetIsolate()->GetHeapProfiler();
heap_profiler->StartTrackingHeapObjects(true);
CompileRun(
"var a = [];\n"
"for (var i = 0; i < 5; ++i)\n"
" a[i] = i;\n"
"for (var i = 0; i < 3; ++i)\n"
" a.shift();\n");
const char* names[] = {""};
AllocationTracker* tracker =
reinterpret_cast<i::HeapProfiler*>(heap_profiler)->allocation_tracker();
CHECK(tracker);
// Resolve all function locations.
tracker->PrepareForSerialization();
// Print for better diagnostics in case of failure.
tracker->trace_tree()->Print(tracker);
AllocationTraceNode* node = FindNode(tracker, ArrayVector(names));
CHECK(node);
CHECK_GE(node->allocation_count(), 2u);
CHECK_GE(node->allocation_size(), 4u * 5u);
heap_profiler->StopTrackingHeapObjects();
}
TEST(TrackHeapAllocationsWithInlining) {
v8::HandleScope scope(v8::Isolate::GetCurrent());
LocalContext env;
v8::HeapProfiler* heap_profiler = env->GetIsolate()->GetHeapProfiler();
heap_profiler->StartTrackingHeapObjects(true);
CompileRun(record_trace_tree_source);
AllocationTracker* tracker =
reinterpret_cast<i::HeapProfiler*>(heap_profiler)->allocation_tracker();
CHECK(tracker);
// Resolve all function locations.
tracker->PrepareForSerialization();
// Print for better diagnostics in case of failure.
tracker->trace_tree()->Print(tracker);
const char* names[] = {"", "start", "f_0_0"};
AllocationTraceNode* node = FindNode(tracker, ArrayVector(names));
CHECK(node);
CHECK_GE(node->allocation_count(), 10u);
CHECK_GE(node->allocation_size(), 4 * node->allocation_count());
heap_profiler->StopTrackingHeapObjects();
}
TEST(TrackHeapAllocationsWithoutInlining) {
i::FLAG_turbo_inlining = false;
// Disable inlining
i::FLAG_max_inlined_bytecode_size = 0;
i::FLAG_max_inlined_bytecode_size_small = 0;
v8::HandleScope scope(v8::Isolate::GetCurrent());
LocalContext env;
v8::HeapProfiler* heap_profiler = env->GetIsolate()->GetHeapProfiler();
heap_profiler->StartTrackingHeapObjects(true);
CompileRun(record_trace_tree_source);
AllocationTracker* tracker =
reinterpret_cast<i::HeapProfiler*>(heap_profiler)->allocation_tracker();
CHECK(tracker);
// Resolve all function locations.
tracker->PrepareForSerialization();
// Print for better diagnostics in case of failure.
tracker->trace_tree()->Print(tracker);
const char* names[] = {"", "start", "f_0_0", "f_0_1", "f_0_2"};
AllocationTraceNode* node = FindNode(tracker, ArrayVector(names));
CHECK(node);
CHECK_GE(node->allocation_count(), 100u);
CHECK_GE(node->allocation_size(), 4 * node->allocation_count());
heap_profiler->StopTrackingHeapObjects();
}
static const char* inline_heap_allocation_source =
"function f_0(x) {\n"
" return f_1(x+1);\n"
"}\n"
"%NeverOptimizeFunction(f_0);\n"
"function f_1(x) {\n"
" return new f_2(x+1);\n"
"}\n"
"%NeverOptimizeFunction(f_1);\n"
"function f_2(x) {\n"
" this.foo = x;\n"
"}\n"
"var instances = [];\n"
"function start() {\n"
" instances.push(f_0(0));\n"
"}\n"
"\n"
"for (var i = 0; i < 100; i++) start();\n";
TEST(TrackBumpPointerAllocations) {
i::FLAG_allow_natives_syntax = true;
v8::HandleScope scope(v8::Isolate::GetCurrent());
LocalContext env;
v8::HeapProfiler* heap_profiler = env->GetIsolate()->GetHeapProfiler();
const char* names[] = {"", "start", "f_0", "f_1"};
// First check that normally all allocations are recorded.
{
heap_profiler->StartTrackingHeapObjects(true);
CompileRun(inline_heap_allocation_source);
AllocationTracker* tracker =
reinterpret_cast<i::HeapProfiler*>(heap_profiler)->allocation_tracker();
CHECK(tracker);
// Resolve all function locations.
tracker->PrepareForSerialization();
// Print for better diagnostics in case of failure.
tracker->trace_tree()->Print(tracker);
AllocationTraceNode* node = FindNode(tracker, ArrayVector(names));
CHECK(node);
CHECK_GE(node->allocation_count(), 100u);
CHECK_GE(node->allocation_size(), 4 * node->allocation_count());
heap_profiler->StopTrackingHeapObjects();
}
{
heap_profiler->StartTrackingHeapObjects(true);
// Now check that not all allocations are tracked if we manually reenable
// inline allocations.
CHECK(CcTest::heap()->inline_allocation_disabled());
CcTest::heap()->EnableInlineAllocation();
CompileRun(inline_heap_allocation_source);
AllocationTracker* tracker =
reinterpret_cast<i::HeapProfiler*>(heap_profiler)->allocation_tracker();
CHECK(tracker);
// Resolve all function locations.
tracker->PrepareForSerialization();
// Print for better diagnostics in case of failure.
tracker->trace_tree()->Print(tracker);
AllocationTraceNode* node = FindNode(tracker, ArrayVector(names));
CHECK(node);
CHECK_LT(node->allocation_count(), 100u);
CcTest::heap()->DisableInlineAllocation();
heap_profiler->StopTrackingHeapObjects();
}
}
TEST(TrackV8ApiAllocation) {
v8::HandleScope scope(v8::Isolate::GetCurrent());
LocalContext env;
v8::HeapProfiler* heap_profiler = env->GetIsolate()->GetHeapProfiler();
const char* names[] = { "(V8 API)" };
heap_profiler->StartTrackingHeapObjects(true);
v8::Local<v8::Object> o1 = v8::Object::New(env->GetIsolate());
o1->Clone();
AllocationTracker* tracker =
reinterpret_cast<i::HeapProfiler*>(heap_profiler)->allocation_tracker();
CHECK(tracker);
// Resolve all function locations.
tracker->PrepareForSerialization();
// Print for better diagnostics in case of failure.
tracker->trace_tree()->Print(tracker);
AllocationTraceNode* node = FindNode(tracker, ArrayVector(names));
CHECK(node);
CHECK_GE(node->allocation_count(), 2u);
CHECK_GE(node->allocation_size(), 4 * node->allocation_count());
heap_profiler->StopTrackingHeapObjects();
}
TEST(ArrayBufferAndArrayBufferView) {
LocalContext env;
v8::HandleScope scope(env->GetIsolate());
v8::HeapProfiler* heap_profiler = env->GetIsolate()->GetHeapProfiler();
CompileRun("arr1 = new Uint32Array(100);\n");
const v8::HeapSnapshot* snapshot = heap_profiler->TakeHeapSnapshot();
CHECK(ValidateSnapshot(snapshot));
const v8::HeapGraphNode* global = GetGlobalObject(snapshot);
const v8::HeapGraphNode* arr1_obj = GetProperty(
env->GetIsolate(), global, v8::HeapGraphEdge::kProperty, "arr1");
CHECK(arr1_obj);
const v8::HeapGraphNode* arr1_buffer = GetProperty(
env->GetIsolate(), arr1_obj, v8::HeapGraphEdge::kInternal, "buffer");
CHECK(arr1_buffer);
const v8::HeapGraphNode* backing_store =
GetProperty(env->GetIsolate(), arr1_buffer, v8::HeapGraphEdge::kInternal,
"backing_store");
CHECK(backing_store);
CHECK_EQ(400, static_cast<int>(backing_store->GetShallowSize()));
}
static int GetRetainersCount(const v8::HeapSnapshot* snapshot,
const v8::HeapGraphNode* node) {
int count = 0;
for (int i = 0, l = snapshot->GetNodesCount(); i < l; ++i) {
const v8::HeapGraphNode* parent = snapshot->GetNode(i);
for (int j = 0, l2 = parent->GetChildrenCount(); j < l2; ++j) {
if (parent->GetChild(j)->GetToNode() == node) {
++count;
}
}
}
return count;
}
TEST(ArrayBufferSharedBackingStore) {
LocalContext env;
v8::Isolate* isolate = env->GetIsolate();
v8::HandleScope handle_scope(isolate);
v8::HeapProfiler* heap_profiler = isolate->GetHeapProfiler();
v8::Local<v8::ArrayBuffer> ab = v8::ArrayBuffer::New(isolate, 1024);
CHECK_EQ(1024, static_cast<int>(ab->ByteLength()));
CHECK(!ab->IsExternal());
v8::ArrayBuffer::Contents ab_contents = ab->Externalize();
CHECK(ab->IsExternal());
CHECK_EQ(1024, static_cast<int>(ab_contents.ByteLength()));
void* data = ab_contents.Data();
CHECK_NOT_NULL(data);
v8::Local<v8::ArrayBuffer> ab2 =
v8::ArrayBuffer::New(isolate, data, ab_contents.ByteLength());
CHECK(ab2->IsExternal());
env->Global()->Set(env.local(), v8_str("ab1"), ab).FromJust();
env->Global()->Set(env.local(), v8_str("ab2"), ab2).FromJust();
v8::Local<v8::Value> result = CompileRun("ab2.byteLength");
CHECK_EQ(1024, result->Int32Value(env.local()).FromJust());
const v8::HeapSnapshot* snapshot = heap_profiler->TakeHeapSnapshot();
CHECK(ValidateSnapshot(snapshot));
const v8::HeapGraphNode* global = GetGlobalObject(snapshot);
const v8::HeapGraphNode* ab1_node = GetProperty(
env->GetIsolate(), global, v8::HeapGraphEdge::kProperty, "ab1");
CHECK(ab1_node);
const v8::HeapGraphNode* ab1_data =
GetProperty(env->GetIsolate(), ab1_node, v8::HeapGraphEdge::kInternal,
"backing_store");
CHECK(ab1_data);
const v8::HeapGraphNode* ab2_node = GetProperty(
env->GetIsolate(), global, v8::HeapGraphEdge::kProperty, "ab2");
CHECK(ab2_node);
const v8::HeapGraphNode* ab2_data =
GetProperty(env->GetIsolate(), ab2_node, v8::HeapGraphEdge::kInternal,
"backing_store");
CHECK(ab2_data);
CHECK_EQ(ab1_data, ab2_data);
CHECK_EQ(2, GetRetainersCount(snapshot, ab1_data));
free(data);
}
TEST(WeakContainers) {
i::FLAG_allow_natives_syntax = true;
LocalContext env;
v8::HandleScope scope(env->GetIsolate());
if (!CcTest::i_isolate()->use_optimizer()) return;
v8::HeapProfiler* heap_profiler = env->GetIsolate()->GetHeapProfiler();
CompileRun(
"function foo(a) { return a.x; }\n"
"obj = {x : 123};\n"
"foo(obj);\n"
"foo(obj);\n"
"%OptimizeFunctionOnNextCall(foo);\n"
"foo(obj);\n");
const v8::HeapSnapshot* snapshot = heap_profiler->TakeHeapSnapshot();
CHECK(ValidateSnapshot(snapshot));
const v8::HeapGraphNode* global = GetGlobalObject(snapshot);
const v8::HeapGraphNode* obj = GetProperty(
env->GetIsolate(), global, v8::HeapGraphEdge::kProperty, "obj");
CHECK(obj);
const v8::HeapGraphNode* map =
GetProperty(env->GetIsolate(), obj, v8::HeapGraphEdge::kInternal, "map");
CHECK(map);
const v8::HeapGraphNode* dependent_code = GetProperty(
env->GetIsolate(), map, v8::HeapGraphEdge::kInternal, "dependent_code");
if (!dependent_code) return;
int count = dependent_code->GetChildrenCount();
CHECK_NE(0, count);
for (int i = 0; i < count; ++i) {
const v8::HeapGraphEdge* prop = dependent_code->GetChild(i);
CHECK_EQ(v8::HeapGraphEdge::kInternal, prop->GetType());
}
}
TEST(JSPromise) {
LocalContext env;
v8::HandleScope scope(env->GetIsolate());
v8::HeapProfiler* heap_profiler = env->GetIsolate()->GetHeapProfiler();
CompileRun(
"function A() {}\n"
"function B() {}\n"
"resolved = Promise.resolve(new A());\n"
"rejected = Promise.reject(new B());\n"
"pending = new Promise(() => 0);\n"
"chained = pending.then(A, B);\n");
const v8::HeapSnapshot* snapshot = heap_profiler->TakeHeapSnapshot();
CHECK(ValidateSnapshot(snapshot));
const v8::HeapGraphNode* global = GetGlobalObject(snapshot);
const v8::HeapGraphNode* resolved = GetProperty(
env->GetIsolate(), global, v8::HeapGraphEdge::kProperty, "resolved");
CHECK(GetProperty(env->GetIsolate(), resolved, v8::HeapGraphEdge::kInternal,
"reactions_or_result"));
const v8::HeapGraphNode* rejected = GetProperty(
env->GetIsolate(), global, v8::HeapGraphEdge::kProperty, "rejected");
CHECK(GetProperty(env->GetIsolate(), rejected, v8::HeapGraphEdge::kInternal,
"reactions_or_result"));
const v8::HeapGraphNode* pending = GetProperty(
env->GetIsolate(), global, v8::HeapGraphEdge::kProperty, "pending");
CHECK(GetProperty(env->GetIsolate(), pending, v8::HeapGraphEdge::kInternal,
"reactions_or_result"));
const char* objectNames[] = {"resolved", "rejected", "pending", "chained"};
for (auto objectName : objectNames) {
const v8::HeapGraphNode* promise = GetProperty(
env->GetIsolate(), global, v8::HeapGraphEdge::kProperty, objectName);
EnsureNoUninstrumentedInternals(env->GetIsolate(), promise);
}
}
class EmbedderNode : public v8::EmbedderGraph::Node {
public:
explicit EmbedderNode(const char* name, size_t size)
: name_(name), size_(size) {}
// Graph::Node overrides.
const char* Name() override { return name_; }
size_t SizeInBytes() override { return size_; }
private:
const char* name_;
size_t size_;
};
class EmbedderRootNode : public EmbedderNode {
public:
explicit EmbedderRootNode(const char* name) : EmbedderNode(name, 0) {}
// Graph::Node override.
bool IsRootNode() { return true; }
};
// Used to pass the global object to the BuildEmbedderGraph callback.
// Otherwise, the callback has to iterate the global handles to find the
// global object.
v8::Local<v8::Value>* global_object_pointer;
void BuildEmbedderGraph(v8::Isolate* v8_isolate, v8::EmbedderGraph* graph) {
using Node = v8::EmbedderGraph::Node;
Node* global_node = graph->V8Node(*global_object_pointer);
Node* embedder_node_A = graph->AddNode(
std::unique_ptr<Node>(new EmbedderNode("EmbedderNodeA", 10)));
Node* embedder_node_B = graph->AddNode(
std::unique_ptr<Node>(new EmbedderNode("EmbedderNodeB", 20)));
Node* embedder_node_C = graph->AddNode(
std::unique_ptr<Node>(new EmbedderNode("EmbedderNodeC", 30)));
Node* embedder_root = graph->AddNode(
std::unique_ptr<Node>(new EmbedderRootNode("EmbedderRoot")));
graph->AddEdge(global_node, embedder_node_A);
graph->AddEdge(embedder_node_A, embedder_node_B);
graph->AddEdge(embedder_root, embedder_node_C);
graph->AddEdge(embedder_node_C, global_node);
}
void CheckEmbedderGraphSnapshot(v8::Isolate* isolate,
const v8::HeapSnapshot* snapshot) {
const v8::HeapGraphNode* global = GetGlobalObject(snapshot);
const v8::HeapGraphNode* embedder_node_A =
GetChildByName(global, "EmbedderNodeA");
CHECK_EQ(10, GetSize(embedder_node_A));
const v8::HeapGraphNode* embedder_node_B =
GetChildByName(embedder_node_A, "EmbedderNodeB");
CHECK_EQ(20, GetSize(embedder_node_B));
const v8::HeapGraphNode* embedder_root =
GetRootChild(snapshot, "EmbedderRoot");
CHECK(embedder_root);
const v8::HeapGraphNode* embedder_node_C =
GetChildByName(embedder_root, "EmbedderNodeC");
CHECK_EQ(30, GetSize(embedder_node_C));
const v8::HeapGraphNode* global_reference =
GetChildByName(embedder_node_C, "Object");
CHECK(global_reference);
}
TEST(EmbedderGraph) {
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();
heap_profiler->SetBuildEmbedderGraphCallback(BuildEmbedderGraph);
const v8::HeapSnapshot* snapshot = heap_profiler->TakeHeapSnapshot();
CHECK(ValidateSnapshot(snapshot));
CheckEmbedderGraphSnapshot(env->GetIsolate(), snapshot);
}
static inline i::Address ToAddress(int n) {
return reinterpret_cast<i::Address>(n);
}
TEST(AddressToTraceMap) {
i::AddressToTraceMap map;
CHECK_EQ(0u, map.GetTraceNodeId(ToAddress(150)));
// [0x100, 0x200) -> 1
map.AddRange(ToAddress(0x100), 0x100, 1U);
CHECK_EQ(0u, map.GetTraceNodeId(ToAddress(0x50)));
CHECK_EQ(1u, map.GetTraceNodeId(ToAddress(0x100)));
CHECK_EQ(1u, map.GetTraceNodeId(ToAddress(0x150)));
CHECK_EQ(0u, map.GetTraceNodeId(ToAddress(0x100 + 0x100)));
CHECK_EQ(1u, map.size());
// [0x100, 0x200) -> 1, [0x200, 0x300) -> 2
map.AddRange(ToAddress(0x200), 0x100, 2U);
CHECK_EQ(2u, map.GetTraceNodeId(ToAddress(0x2A0)));
CHECK_EQ(2u, map.size());
// [0x100, 0x180) -> 1, [0x180, 0x280) -> 3, [0x280, 0x300) -> 2
map.AddRange(ToAddress(0x180), 0x100, 3U);
CHECK_EQ(1u, map.GetTraceNodeId(ToAddress(0x17F)));
CHECK_EQ(2u, map.GetTraceNodeId(ToAddress(0x280)));
CHECK_EQ(3u, map.GetTraceNodeId(ToAddress(0x180)));
CHECK_EQ(3u, map.size());
// [0x100, 0x180) -> 1, [0x180, 0x280) -> 3, [0x280, 0x300) -> 2,
// [0x400, 0x500) -> 4
map.AddRange(ToAddress(0x400), 0x100, 4U);
CHECK_EQ(1u, map.GetTraceNodeId(ToAddress(0x17F)));
CHECK_EQ(2u, map.GetTraceNodeId(ToAddress(0x280)));
CHECK_EQ(3u, map.GetTraceNodeId(ToAddress(0x180)));
CHECK_EQ(4u, map.GetTraceNodeId(ToAddress(0x450)));
CHECK_EQ(0u, map.GetTraceNodeId(ToAddress(0x500)));
CHECK_EQ(0u, map.GetTraceNodeId(ToAddress(0x350)));
CHECK_EQ(4u, map.size());
// [0x100, 0x180) -> 1, [0x180, 0x200) -> 3, [0x200, 0x600) -> 5
map.AddRange(ToAddress(0x200), 0x400, 5U);
CHECK_EQ(5u, map.GetTraceNodeId(ToAddress(0x200)));
CHECK_EQ(5u, map.GetTraceNodeId(ToAddress(0x400)));
CHECK_EQ(3u, map.size());
// [0x100, 0x180) -> 1, [0x180, 0x200) -> 7, [0x200, 0x600) ->5
map.AddRange(ToAddress(0x180), 0x80, 6U);
map.AddRange(ToAddress(0x180), 0x80, 7U);
CHECK_EQ(7u, map.GetTraceNodeId(ToAddress(0x180)));
CHECK_EQ(5u, map.GetTraceNodeId(ToAddress(0x200)));
CHECK_EQ(3u, map.size());
map.Clear();
CHECK_EQ(0u, map.size());
CHECK_EQ(0u, map.GetTraceNodeId(ToAddress(0x400)));
}
static const v8::AllocationProfile::Node* FindAllocationProfileNode(
v8::Isolate* isolate, v8::AllocationProfile& profile,
const Vector<const char*>& names) {
v8::AllocationProfile::Node* node = profile.GetRootNode();
for (int i = 0; node != nullptr && i < names.length(); ++i) {
const char* name = names[i];
auto children = node->children;
node = nullptr;
for (v8::AllocationProfile::Node* child : children) {
v8::String::Utf8Value child_name(isolate, child->name);
if (strcmp(*child_name, name) == 0) {
node = child;
break;
}
}
}
return node;
}
static void CheckNoZeroCountNodes(v8::AllocationProfile::Node* node) {
for (auto alloc : node->allocations) {
CHECK_GT(alloc.count, 0u);
}
for (auto child : node->children) {
CheckNoZeroCountNodes(child);
}
}
TEST(SamplingHeapProfiler) {
v8::HandleScope scope(v8::Isolate::GetCurrent());
LocalContext env;
v8::HeapProfiler* heap_profiler = env->GetIsolate()->GetHeapProfiler();
// Turn off always_opt. Inlining can cause stack traces to be shorter than
// what we expect in this test.
v8::internal::FLAG_always_opt = false;
// Suppress randomness to avoid flakiness in tests.
v8::internal::FLAG_sampling_heap_profiler_suppress_randomness = true;
const char* script_source =
"var A = [];\n"
"function bar(size) { return new Array(size); }\n"
"var foo = function() {\n"
" for (var i = 0; i < 1024; ++i) {\n"
" A[i] = bar(1024);\n"
" }\n"
"}\n"
"foo();";
// Sample should be empty if requested before sampling has started.
{
v8::AllocationProfile* profile = heap_profiler->GetAllocationProfile();
CHECK_NULL(profile);
}
int count_1024 = 0;
{
heap_profiler->StartSamplingHeapProfiler(1024);
CompileRun(script_source);
std::unique_ptr<v8::AllocationProfile> profile(
heap_profiler->GetAllocationProfile());
CHECK(profile);
const char* names[] = {"", "foo", "bar"};
auto node_bar = FindAllocationProfileNode(env->GetIsolate(), *profile,
ArrayVector(names));
CHECK(node_bar);
// Count the number of allocations we sampled from bar.
for (auto allocation : node_bar->allocations) {
count_1024 += allocation.count;
}
heap_profiler->StopSamplingHeapProfiler();
}
// Samples should get cleared once sampling is stopped.
{
v8::AllocationProfile* profile = heap_profiler->GetAllocationProfile();
CHECK_NULL(profile);
}
// Sampling at a higher rate should give us similar numbers of objects.
{
heap_profiler->StartSamplingHeapProfiler(128);
CompileRun(script_source);
std::unique_ptr<v8::AllocationProfile> profile(
heap_profiler->GetAllocationProfile());
CHECK(profile);
const char* names[] = {"", "foo", "bar"};
auto node_bar = FindAllocationProfileNode(env->GetIsolate(), *profile,
ArrayVector(names));
CHECK(node_bar);
// Count the number of allocations we sampled from bar.
int count_128 = 0;
for (auto allocation : node_bar->allocations) {
count_128 += allocation.count;
}
// We should have similar unsampled counts of allocations. Though
// we will sample different numbers of objects at different rates,
// the unsampling process should produce similar final estimates
// at the true number of allocations. However, the process to
// determine these unsampled counts is probabilisitic so we need to
// account for error.
double max_count = std::max(count_128, count_1024);
double min_count = std::min(count_128, count_1024);
double percent_difference = (max_count - min_count) / min_count;
CHECK_LT(percent_difference, 0.15);
heap_profiler->StopSamplingHeapProfiler();
}
// A more complicated test cases with deeper call graph and dynamically
// generated function names.
{
heap_profiler->StartSamplingHeapProfiler(64);
CompileRun(record_trace_tree_source);
std::unique_ptr<v8::AllocationProfile> profile(
heap_profiler->GetAllocationProfile());
CHECK(profile);
const char* names1[] = {"", "start", "f_0_0", "f_0_1", "f_0_2"};
auto node1 = FindAllocationProfileNode(env->GetIsolate(), *profile,
ArrayVector(names1));
CHECK(node1);
const char* names2[] = {"", "generateFunctions"};
auto node2 = FindAllocationProfileNode(env->GetIsolate(), *profile,
ArrayVector(names2));
CHECK(node2);
heap_profiler->StopSamplingHeapProfiler();
}
// A test case with scripts unloaded before profile gathered
{
heap_profiler->StartSamplingHeapProfiler(64);
CompileRun(
"for (var i = 0; i < 1024; i++) {\n"
" eval(\"new Array(100)\");\n"
"}\n");
CcTest::CollectAllGarbage();
std::unique_ptr<v8::AllocationProfile> profile(
heap_profiler->GetAllocationProfile());
CHECK(profile);
CheckNoZeroCountNodes(profile->GetRootNode());
heap_profiler->StopSamplingHeapProfiler();
}
}
TEST(SamplingHeapProfilerApiAllocation) {
v8::HandleScope scope(v8::Isolate::GetCurrent());
LocalContext env;
v8::HeapProfiler* heap_profiler = env->GetIsolate()->GetHeapProfiler();
// Suppress randomness to avoid flakiness in tests.
v8::internal::FLAG_sampling_heap_profiler_suppress_randomness = true;
heap_profiler->StartSamplingHeapProfiler(256);
for (int i = 0; i < 8 * 1024; ++i) v8::Object::New(env->GetIsolate());
std::unique_ptr<v8::AllocationProfile> profile(
heap_profiler->GetAllocationProfile());
CHECK(profile);
const char* names[] = {"(V8 API)"};
auto node = FindAllocationProfileNode(env->GetIsolate(), *profile,
ArrayVector(names));
CHECK(node);
heap_profiler->StopSamplingHeapProfiler();
}
TEST(SamplingHeapProfilerLeftTrimming) {
v8::HandleScope scope(v8::Isolate::GetCurrent());
LocalContext env;
v8::HeapProfiler* heap_profiler = env->GetIsolate()->GetHeapProfiler();
// Suppress randomness to avoid flakiness in tests.
v8::internal::FLAG_sampling_heap_profiler_suppress_randomness = true;
heap_profiler->StartSamplingHeapProfiler(64);
CompileRun(
"for (var j = 0; j < 500; ++j) {\n"
" var a = [];\n"
" for (var i = 0; i < 5; ++i)\n"
" a[i] = i;\n"
" for (var i = 0; i < 3; ++i)\n"
" a.shift();\n"
"}\n");
CcTest::CollectGarbage(v8::internal::NEW_SPACE);
// Should not crash.
heap_profiler->StopSamplingHeapProfiler();
}
TEST(SamplingHeapProfilerPretenuredInlineAllocations) {
i::FLAG_allow_natives_syntax = true;
i::FLAG_expose_gc = true;
CcTest::InitializeVM();
if (!CcTest::i_isolate()->use_optimizer() || i::FLAG_always_opt) return;
if (i::FLAG_gc_global || i::FLAG_stress_compaction ||
i::FLAG_stress_incremental_marking) {
return;
}
v8::HandleScope scope(v8::Isolate::GetCurrent());
LocalContext env;
v8::HeapProfiler* heap_profiler = env->GetIsolate()->GetHeapProfiler();
// Suppress randomness to avoid flakiness in tests.
v8::internal::FLAG_sampling_heap_profiler_suppress_randomness = true;
// Grow new space until maximum capacity reached.
while (!CcTest::heap()->new_space()->IsAtMaximumCapacity()) {
CcTest::heap()->new_space()->Grow();
}
i::ScopedVector<char> source(1024);
i::SNPrintF(source,
"var number_elements = %d;"
"var elements = new Array(number_elements);"
"function f() {"
" for (var i = 0; i < number_elements; i++) {"
" elements[i] = [{}, {}, {}];"
" }"
" return elements[number_elements - 1];"
"};"
"f(); gc();"
"f(); f();"
"%%OptimizeFunctionOnNextCall(f);"
"f();"
"f;",
i::AllocationSite::kPretenureMinimumCreated + 1);
v8::Local<v8::Function> f =
v8::Local<v8::Function>::Cast(CompileRun(source.start()));
// Make sure the function is producing pre-tenured objects.
auto res = f->Call(env.local(), env->Global(), 0, nullptr).ToLocalChecked();
i::Handle<i::JSObject> o = i::Handle<i::JSObject>::cast(
v8::Utils::OpenHandle(*v8::Local<v8::Object>::Cast(res)));
CHECK(CcTest::heap()->InOldSpace(o->elements()));
CHECK(CcTest::heap()->InOldSpace(*o));
// Call the function and profile it.
heap_profiler->StartSamplingHeapProfiler(64);
for (int i = 0; i < 80; ++i) {
f->Call(env.local(), env->Global(), 0, nullptr).ToLocalChecked();
}
std::unique_ptr<v8::AllocationProfile> profile(
heap_profiler->GetAllocationProfile());
CHECK(profile);
heap_profiler->StopSamplingHeapProfiler();
const char* names[] = {"f"};
auto node_f = FindAllocationProfileNode(env->GetIsolate(), *profile,
ArrayVector(names));
CHECK(node_f);
int count = 0;
for (auto allocation : node_f->allocations) {
count += allocation.count;
}
CHECK_GE(count, 8000);
}
TEST(SamplingHeapProfilerLargeInterval) {
v8::HandleScope scope(v8::Isolate::GetCurrent());
LocalContext env;
v8::HeapProfiler* heap_profiler = env->GetIsolate()->GetHeapProfiler();
// Suppress randomness to avoid flakiness in tests.
v8::internal::FLAG_sampling_heap_profiler_suppress_randomness = true;
heap_profiler->StartSamplingHeapProfiler(512 * 1024);
for (int i = 0; i < 8 * 1024; ++i) {
CcTest::i_isolate()->factory()->NewFixedArray(1024);
}
std::unique_ptr<v8::AllocationProfile> profile(
heap_profiler->GetAllocationProfile());
CHECK(profile);
const char* names[] = {"(EXTERNAL)"};
auto node = FindAllocationProfileNode(env->GetIsolate(), *profile,
ArrayVector(names));
CHECK(node);
heap_profiler->StopSamplingHeapProfiler();
}
TEST(HeapSnapshotPrototypeNotJSReceiver) {
LocalContext env;
v8::HandleScope scope(env->GetIsolate());
v8::HeapProfiler* heap_profiler = env->GetIsolate()->GetHeapProfiler();
CompileRun(
"function object() {}"
"object.prototype = 42;");
const v8::HeapSnapshot* snapshot = heap_profiler->TakeHeapSnapshot();
CHECK(ValidateSnapshot(snapshot));
}
TEST(SamplingHeapProfilerSampleDuringDeopt) {
i::FLAG_allow_natives_syntax = true;
v8::HandleScope scope(v8::Isolate::GetCurrent());
LocalContext env;
v8::HeapProfiler* heap_profiler = env->GetIsolate()->GetHeapProfiler();
// Suppress randomness to avoid flakiness in tests.
v8::internal::FLAG_sampling_heap_profiler_suppress_randomness = true;
// Small sample interval to force each object to be sampled.
heap_profiler->StartSamplingHeapProfiler(i::kPointerSize);
// Lazy deopt from runtime call from inlined callback function.
const char* source =
"var b = "
" [1,2,3,4,5,6,7,8,9,10,11,12,13,14,15,16,17,18,19,20,21,22,23,24,25];"
"(function f() {"
" var result = 0;"
" var lazyDeopt = function(deopt) {"
" var callback = function(v,i,o) {"
" result += i;"
" if (i == 13 && deopt) {"
" %DeoptimizeNow();"
" }"
" return v;"
" };"
" b.map(callback);"
" };"
" lazyDeopt();"
" lazyDeopt();"
" %OptimizeFunctionOnNextCall(lazyDeopt);"
" lazyDeopt();"
" lazyDeopt(true);"
" lazyDeopt();"
"})();";
CompileRun(source);
// Should not crash.
std::unique_ptr<v8::AllocationProfile> profile(
heap_profiler->GetAllocationProfile());
CHECK(profile);
heap_profiler->StopSamplingHeapProfiler();
}
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