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v8/test/cctest/test-heap-profiler.cc
Michael Lippautz 2ac8bb7199 profiler: Allow querying SnapshotObjectId for native objects 
- Adds regular native heap entries to the HeapObjectsMap.
- Adds a side map for keeping a mapping of native objects to their canonical
  heap entry that they have been merged into.

Change-Id: Ida00628126ded1948ceb2a0cbe14da817af7f361
Bug: chromium:988350
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/1720810
Commit-Queue: Michael Lippautz <mlippautz@chromium.org>
Reviewed-by: Alexei Filippov <alph@chromium.org>
Reviewed-by: Ulan Degenbaev <ulan@chromium.org>
Cr-Commit-Position: refs/heads/master@{#63140}
2019-08-09 08:41:03 +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/init/v8.h"
#include "include/v8-profiler.h"
#include "src/api/api-inl.h"
#include "src/base/hashmap.h"
#include "src/base/optional.h"
#include "src/codegen/assembler-inl.h"
#include "src/debug/debug.h"
#include "src/heap/heap-inl.h"
#include "src/objects/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"
#include "test/cctest/collector.h"
#include "test/cctest/heap/heap-utils.h"
using i::AllocationTraceNode;
using i::AllocationTraceTree;
using i::AllocationTracker;
using i::ArrayVector;
using i::SourceLocation;
using i::Vector;
using v8::base::Optional;
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 const char* GetName(const v8::HeapGraphEdge* edge) {
return const_cast<i::HeapGraphEdge*>(
reinterpret_cast<const i::HeapGraphEdge*>(edge))
->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::HeapGraphEdge* GetEdgeByChildName(
const v8::HeapGraphNode* node, const char* name) {
for (int i = 0, count = node->GetChildrenCount(); i < count; ++i) {
const v8::HeapGraphEdge* edge = node->GetChild(i);
const v8::HeapGraphNode* child = edge->GetToNode();
if (!strcmp(name, GetName(child))) {
return edge;
}
}
return nullptr;
}
static const v8::HeapGraphNode* GetRootChild(const v8::HeapSnapshot* snapshot,
const char* name) {
return GetChildByName(snapshot->GetRoot(), name);
}
static Optional<SourceLocation> GetLocation(const v8::HeapSnapshot* s,
const v8::HeapGraphNode* node) {
const i::HeapSnapshot* snapshot = reinterpret_cast<const i::HeapSnapshot*>(s);
const std::vector<SourceLocation>& locations = snapshot->locations();
const i::HeapEntry* entry = reinterpret_cast<const i::HeapEntry*>(node);
for (const auto& loc : locations) {
if (loc.entry_index == entry->index()) {
return Optional<SourceLocation>(loc);
}
}
return Optional<SourceLocation>();
}
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::deque<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;
}
bool EndsWith(const char* a, const char* b) {
size_t length_a = strlen(a);
size_t length_b = strlen(b);
return (length_a >= length_b) && !strcmp(a + length_a - length_b, b);
}
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(HeapSnapshotLocations) {
LocalContext env;
v8::HandleScope scope(env->GetIsolate());
v8::HeapProfiler* heap_profiler = env->GetIsolate()->GetHeapProfiler();
CompileRun(
"function X(a) { return function() { return a; } }\n"
"function* getid() { yield 1; }\n"
"class A {}\n"
"var x = X(1);\n"
"var g = getid();\n"
"var o = new A();");
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);
Optional<SourceLocation> x_loc = GetLocation(snapshot, x);
CHECK(x_loc);
CHECK_EQ(0, x_loc->line);
CHECK_EQ(31, x_loc->col);
const v8::HeapGraphNode* g =
GetProperty(env->GetIsolate(), global, v8::HeapGraphEdge::kProperty, "g");
CHECK(x);
Optional<SourceLocation> g_loc = GetLocation(snapshot, g);
CHECK(g_loc);
CHECK_EQ(1, g_loc->line);
CHECK_EQ(15, g_loc->col);
const v8::HeapGraphNode* o =
GetProperty(env->GetIsolate(), global, v8::HeapGraphEdge::kProperty, "o");
CHECK(x);
Optional<SourceLocation> o_loc = GetLocation(snapshot, o);
CHECK(o_loc);
CHECK_EQ(2, o_loc->line);
CHECK_EQ(0, o_loc->col);
}
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) { ()=>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 shared function info.
const v8::HeapGraphNode* compiled_sfi = GetProperty(
env->GetIsolate(), compiled, v8::HeapGraphEdge::kInternal, "shared");
CHECK(compiled_sfi);
const v8::HeapGraphNode* lazy_sfi = GetProperty(
env->GetIsolate(), lazy, v8::HeapGraphEdge::kInternal, "shared");
CHECK(lazy_sfi);
// TODO(leszeks): Check that there's bytecode on the compiled function, but
// not the lazy function.
// Verify that non-compiled function doesn't contain references to "x"
// literal, while compiled function 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_sfi->GetChildrenCount(); i < count; ++i) {
const v8::HeapGraphEdge* prop = compiled_sfi->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_sfi->GetChildrenCount(); i < count; ++i) {
const v8::HeapGraphEdge* prop = lazy_sfi->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(HeapSnapshotHeapBigInts) {
LocalContext env;
v8::HandleScope scope(env->GetIsolate());
v8::HeapProfiler* heap_profiler = env->GetIsolate()->GetHeapProfiler();
CompileRun(
"a = 1n;"
"b = Object(BigInt(2))");
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(v8::HeapGraphNode::kBigInt, a->GetType());
const v8::HeapGraphNode* b =
GetProperty(env->GetIsolate(), global, v8::HeapGraphEdge::kProperty, "b");
CHECK(b);
CHECK_EQ(v8::HeapGraphNode::kObject, 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(2, weak_entries); // Key and value are 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 = {}; this.bar = 0; }\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"));
const v8::HeapGraphNode* parent_map = GetProperty(
env->GetIsolate(), map, v8::HeapGraphEdge::kInternal, "back_pointer");
CHECK(parent_map);
CHECK(GetProperty(env->GetIsolate(), map, v8::HeapGraphEdge::kInternal,
"back_pointer"));
CHECK(GetProperty(env->GetIsolate(), map, v8::HeapGraphEdge::kInternal,
"descriptors"));
CHECK(GetProperty(env->GetIsolate(), parent_map, v8::HeapGraphEdge::kWeak,
"transition"));
}
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(HeapSnapshotEphemeron) {
LocalContext env;
v8::HandleScope scope(env->GetIsolate());
v8::HeapProfiler* heap_profiler = env->GetIsolate()->GetHeapProfiler();
CompileRun(
"class KeyClass{};\n"
"class ValueClass{};\n"
"var wm = new WeakMap();\n"
"function foo(key) { wm.set(key, new ValueClass()); }\n"
"var key = new KeyClass();\n"
"foo(key);");
const v8::HeapSnapshot* snapshot = heap_profiler->TakeHeapSnapshot();
CHECK(ValidateSnapshot(snapshot));
const v8::HeapGraphNode* global = GetGlobalObject(snapshot);
const v8::HeapGraphNode* key = GetProperty(
env->GetIsolate(), global, v8::HeapGraphEdge::kProperty, "key");
CHECK(key);
bool success = false;
for (int i = 0, count = key->GetChildrenCount(); i < count; ++i) {
const v8::HeapGraphEdge* edge = key->GetChild(i);
const v8::HeapGraphNode* child = edge->GetToNode();
if (!strcmp("ValueClass", GetName(child))) {
v8::String::Utf8Value edge_name(CcTest::isolate(), edge->GetName());
CHECK(EndsWith(*edge_name, " / key KeyClass in WeakMap"));
success = true;
break;
}
}
CHECK(success);
}
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());
}
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) {}
~TestJSONStream() override = default;
void EndOfStream() override { ++eos_signaled_; }
WriteResult WriteAsciiChunk(char* buffer, int chars_written) override {
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.begin(), 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.begin()) {
length_ = string.length();
}
const char* data() const override { return data_; }
size_t length() const override { 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("locations")).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_NOEXCEPT = default;
~TestStatsStream() override = default;
void EndOfStream() override { ++eos_signaled_; }
WriteResult WriteAsciiChunk(char* buffer, int chars_written) override {
UNREACHABLE();
}
WriteResult WriteHeapStatsChunk(v8::HeapStatsUpdate* buffer,
int updates_written) override {
++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),
reported_finish_(false) {}
ControlOption ReportProgressValue(int done, int total) override {
done_ = done;
total_ = total;
CHECK_LE(done_, total_);
if (done_ == total_) {
CHECK(!reported_finish_);
reported_finish_ = true;
}
return --abort_count_ != 0 ? kContinue : kAbort;
}
int done() { return done_; }
int total() { return total_; }
private:
int done_;
int total_;
int abort_count_;
bool reported_finish_;
};
} // 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);
}
TEST(TakeHeapSnapshotReportFinishOnce) {
LocalContext env;
v8::HandleScope scope(env->GetIsolate());
v8::HeapProfiler* heap_profiler = env->GetIsolate()->GetHeapProfiler();
TestActivityControl control(-1);
const v8::HeapSnapshot* snapshot = heap_profiler->TakeHeapSnapshot(&control);
CHECK(ValidateSnapshot(snapshot));
CHECK_EQ(control.total(), control.done());
CHECK_GT(control.total(), 0);
}
namespace {
class EmbedderGraphBuilder : public v8::PersistentHandleVisitor {
public:
class Node : public v8::EmbedderGraph::Node {
public:
Node(const char* name, size_t size) : name_(name), size_(size) {}
// v8::EmbedderGraph::Node
const char* Name() override { return name_; }
size_t SizeInBytes() override { return size_; }
private:
const char* name_;
size_t size_;
};
class Group : public Node {
public:
explicit Group(const char* name) : Node(name, 0) {}
// v8::EmbedderGraph::EmbedderNode
bool IsRootNode() override { return true; }
};
EmbedderGraphBuilder(v8::Isolate* isolate, v8::EmbedderGraph* graph)
: isolate_(isolate), graph_(graph) {
classid_to_group_[0] = nullptr;
classid_to_group_[1] =
graph->AddNode(std::unique_ptr<Group>(new Group("aaa-group")));
classid_to_group_[2] =
graph->AddNode(std::unique_ptr<Group>(new Group("ccc-group")));
}
static void BuildEmbedderGraph(v8::Isolate* isolate, v8::EmbedderGraph* graph,
void* data) {
EmbedderGraphBuilder builder(isolate, graph);
isolate->VisitHandlesWithClassIds(&builder);
}
void VisitPersistentHandle(v8::Persistent<v8::Value>* value,
uint16_t class_id) override {
v8::Local<v8::Value> wrapper = v8::Local<v8::Value>::New(
isolate_, v8::Persistent<v8::Value>::Cast(*value));
if (class_id == 1) {
if (wrapper->IsString()) {
v8::String::Utf8Value utf8(CcTest::isolate(), wrapper);
DCHECK(!strcmp(*utf8, "AAA") || !strcmp(*utf8, "BBB"));
v8::EmbedderGraph::Node* node = graph_->V8Node(wrapper);
v8::EmbedderGraph::Node* group = classid_to_group_[1];
graph_->AddEdge(node, group);
graph_->AddEdge(group, node);
}
} else if (class_id == 2) {
if (wrapper->IsString()) {
v8::String::Utf8Value utf8(CcTest::isolate(), wrapper);
DCHECK(!strcmp(*utf8, "CCC"));
v8::EmbedderGraph::Node* node = graph_->V8Node(wrapper);
v8::EmbedderGraph::Node* group = classid_to_group_[2];
graph_->AddEdge(node, group);
graph_->AddEdge(group, node);
}
} else {
UNREACHABLE();
}
}
private:
v8::Isolate* isolate_;
v8::EmbedderGraph* graph_;
v8::EmbedderGraph::Node* classid_to_group_[3];
};
} // 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->AddBuildEmbedderGraphCallback(
EmbedderGraphBuilder::BuildEmbedderGraph, nullptr);
v8::Persistent<v8::String> p_AAA(isolate, v8_str("AAA"));
p_AAA.SetWrapperClassId(1);
v8::Persistent<v8::String> p_BBB(isolate, v8_str("BBB"));
p_BBB.SetWrapperClassId(1);
v8::Persistent<v8::String> p_CCC(isolate, v8_str("CCC"));
p_CCC.SetWrapperClassId(2);
const v8::HeapSnapshot* snapshot = heap_profiler->TakeHeapSnapshot();
CHECK(ValidateSnapshot(snapshot));
const v8::HeapGraphNode* native_group_aaa =
GetNode(snapshot->GetRoot(), v8::HeapGraphNode::kSynthetic, "aaa-group");
CHECK_NOT_NULL(native_group_aaa);
const v8::HeapGraphNode* native_group_ccc =
GetNode(snapshot->GetRoot(), v8::HeapGraphNode::kSynthetic, "ccc-group");
CHECK_NOT_NULL(native_group_ccc);
const v8::HeapGraphNode* n_AAA =
GetNode(native_group_aaa, v8::HeapGraphNode::kString, "AAA");
CHECK(n_AAA);
const v8::HeapGraphNode* n_BBB =
GetNode(native_group_aaa, v8::HeapGraphNode::kString, "BBB");
CHECK(n_BBB);
const v8::HeapGraphNode* n_CCC =
GetNode(native_group_ccc, v8::HeapGraphNode::kString, "CCC");
CHECK(n_CCC);
CHECK_EQ(native_group_aaa, GetChildByName(n_AAA, "aaa-group"));
CHECK_EQ(native_group_aaa, GetChildByName(n_BBB, "aaa-group"));
CHECK_EQ(native_group_ccc, GetChildByName(n_CCC, "ccc-group"));
}
namespace {
class EmbedderGraphBuilderForNativeSnapshotObjectId final {
public:
class RegularNode : public v8::EmbedderGraph::Node {
public:
RegularNode(v8::NativeObject native_object, const char* name, size_t size,
Node* wrapper_node)
: name_(name),
size_(size),
native_object_(native_object),
wrapper_node_(wrapper_node) {}
// v8::EmbedderGraph::Node
const char* Name() override { return name_; }
size_t SizeInBytes() override { return size_; }
Node* WrapperNode() override { return wrapper_node_; }
v8::NativeObject GetNativeObject() override {
return native_object_ ? native_object_ : this;
}
private:
const char* name_;
size_t size_;
v8::NativeObject native_object_;
Node* wrapper_node_;
};
class RootNode : public RegularNode {
public:
explicit RootNode(const char* name)
: RegularNode(nullptr, name, 0, nullptr) {}
// v8::EmbedderGraph::EmbedderNode
bool IsRootNode() override { return true; }
};
struct BuildParameter {
v8::Persistent<v8::String>* wrapper;
void* native1;
void* native2;
};
static void BuildEmbedderGraph(v8::Isolate* isolate, v8::EmbedderGraph* graph,
void* data) {
BuildParameter* parameter = reinterpret_cast<BuildParameter*>(data);
v8::Local<v8::String> local_str =
v8::Local<v8::String>::New(isolate, *(parameter->wrapper));
auto* v8_node = graph->V8Node(local_str);
CHECK(!v8_node->IsEmbedderNode());
auto* root_node =
graph->AddNode(std::unique_ptr<RootNode>(new RootNode("root")));
auto* non_merged_node = graph->AddNode(std::unique_ptr<RegularNode>(
new RegularNode(parameter->native1, "non-merged", 0, nullptr)));
auto* merged_node = graph->AddNode(std::unique_ptr<RegularNode>(
new RegularNode(parameter->native2, "merged", 0, v8_node)));
graph->AddEdge(root_node, non_merged_node);
graph->AddEdge(root_node, merged_node);
}
};
} // namespace
TEST(NativeSnapshotObjectId) {
LocalContext env;
v8::Isolate* isolate = env->GetIsolate();
v8::HandleScope scope(isolate);
v8::HeapProfiler* heap_profiler = isolate->GetHeapProfiler();
v8::Persistent<v8::String> wrapper(isolate, v8_str("wrapper"));
int native1;
int native2;
EmbedderGraphBuilderForNativeSnapshotObjectId::BuildParameter parameter{
&wrapper, &native1, &native2};
heap_profiler->AddBuildEmbedderGraphCallback(
EmbedderGraphBuilderForNativeSnapshotObjectId::BuildEmbedderGraph,
&parameter);
const v8::HeapSnapshot* snapshot = heap_profiler->TakeHeapSnapshot();
CHECK(ValidateSnapshot(snapshot));
v8::SnapshotObjectId non_merged_id = heap_profiler->GetObjectId(&native1);
CHECK_NE(v8::HeapProfiler::kUnknownObjectId, non_merged_id);
v8::SnapshotObjectId merged_id = heap_profiler->GetObjectId(&native2);
CHECK_NE(v8::HeapProfiler::kUnknownObjectId, merged_id);
CHECK_NE(non_merged_id, merged_id);
const v8::HeapGraphNode* non_merged_node =
snapshot->GetNodeById(non_merged_id);
CHECK_NOT_NULL(non_merged_node);
const v8::HeapGraphNode* merged_node = snapshot->GetNodeById(merged_id);
CHECK_NOT_NULL(merged_node);
heap_profiler->ClearObjectIds();
CHECK_EQ(v8::HeapProfiler::kUnknownObjectId,
heap_profiler->GetObjectId(&native1));
CHECK_EQ(v8::HeapProfiler::kUnknownObjectId,
heap_profiler->GetObjectId(&native2));
}
TEST(NativeSnapshotObjectIdMoving) {
// Required to allow moving specific objects.
i::FLAG_manual_evacuation_candidates_selection = true;
LocalContext env;
v8::Isolate* isolate = env->GetIsolate();
v8::HandleScope scope(isolate);
v8::HeapProfiler* heap_profiler = isolate->GetHeapProfiler();
heap_profiler->StartTrackingHeapObjects(true);
v8::Persistent<v8::String> wrapper(isolate, v8_str("wrapper"));
int native1;
int native2;
EmbedderGraphBuilderForNativeSnapshotObjectId::BuildParameter parameter{
&wrapper, &native1, &native2};
heap_profiler->AddBuildEmbedderGraphCallback(
EmbedderGraphBuilderForNativeSnapshotObjectId::BuildEmbedderGraph,
&parameter);
const v8::HeapSnapshot* snapshot = heap_profiler->TakeHeapSnapshot();
CHECK(ValidateSnapshot(snapshot));
v8::SnapshotObjectId non_merged_id = heap_profiler->GetObjectId(&native1);
CHECK_NE(v8::HeapProfiler::kUnknownObjectId, non_merged_id);
v8::SnapshotObjectId merged_id = heap_profiler->GetObjectId(&native2);
CHECK_NE(v8::HeapProfiler::kUnknownObjectId, merged_id);
CHECK_NE(non_merged_id, merged_id);
const v8::HeapGraphNode* non_merged_node =
snapshot->GetNodeById(non_merged_id);
CHECK_NOT_NULL(non_merged_node);
const v8::HeapGraphNode* merged_node = snapshot->GetNodeById(merged_id);
CHECK_NOT_NULL(merged_node);
{
v8::HandleScope scope(isolate);
auto local = v8::Local<v8::String>::New(isolate, wrapper);
i::Handle<i::String> internal = i::Handle<i::String>::cast(
v8::Utils::OpenHandle(*v8::Local<v8::String>::Cast(local)));
i::heap::ForceEvacuationCandidate(i::Page::FromHeapObject(*internal));
}
CcTest::CollectAllGarbage();
non_merged_id = heap_profiler->GetObjectId(&native1);
CHECK_NE(v8::HeapProfiler::kUnknownObjectId, non_merged_id);
merged_id = heap_profiler->GetObjectId(&native2);
CHECK_NE(v8::HeapProfiler::kUnknownObjectId, merged_id);
CHECK_NE(non_merged_id, merged_id);
heap_profiler->StopTrackingHeapObjects();
}
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:
const char* GetName(v8::Local<v8::Object> object) override {
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_EQ(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_EQ(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_EQ(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_EQ(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(GetConstructor) {
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(!i::V8HeapExplorer::GetConstructor(*js_obj1).is_null());
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(!i::V8HeapExplorer::GetConstructor(*js_obj2).is_null());
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(!i::V8HeapExplorer::GetConstructor(*js_obj3).is_null());
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(!i::V8HeapExplorer::GetConstructor(*js_obj4).is_null());
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(i::V8HeapExplorer::GetConstructor(*js_obj5).is_null());
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(i::V8HeapExplorer::GetConstructor(*js_obj6).is_null());
}
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, "0");
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, "2");
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);
}
TEST(JSGeneratorObject) {
v8::Isolate* isolate = CcTest::isolate();
LocalContext env;
v8::HandleScope scope(isolate);
v8::HeapProfiler* heap_profiler = isolate->GetHeapProfiler();
CompileRun(
"function* foo() { yield 1; }\n"
"g = foo();\n");
const v8::HeapSnapshot* snapshot = heap_profiler->TakeHeapSnapshot();
CHECK(ValidateSnapshot(snapshot));
const v8::HeapGraphNode* global = GetGlobalObject(snapshot);
const v8::HeapGraphNode* g =
GetProperty(isolate, global, v8::HeapGraphEdge::kProperty, "g");
CHECK(g);
const v8::HeapGraphNode* function = GetProperty(
env->GetIsolate(), g, v8::HeapGraphEdge::kInternal, "function");
CHECK(function);
const v8::HeapGraphNode* context = GetProperty(
env->GetIsolate(), g, v8::HeapGraphEdge::kInternal, "context");
CHECK(context);
const v8::HeapGraphNode* receiver = GetProperty(
env->GetIsolate(), g, v8::HeapGraphEdge::kInternal, "receiver");
CHECK(receiver);
const v8::HeapGraphNode* parameters_and_registers =
GetProperty(env->GetIsolate(), g, v8::HeapGraphEdge::kInternal,
"parameters_and_registers");
CHECK(parameters_and_registers);
}
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(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) {
// This test gets very slow with slow asserts (18 minutes instead of 1:30,
// as of November 2018).
#ifdef ENABLE_SLOW_DCHECKS
i::FLAG_enable_slow_asserts = false;
#endif
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.begin());
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* feedback_cell =
GetProperty(env->GetIsolate(), fun_code, v8::HeapGraphEdge::kInternal,
"feedback_cell");
CHECK(feedback_cell);
const v8::HeapGraphNode* vector = GetProperty(
env->GetIsolate(), feedback_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.begin(), 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* builtin_path1[] = {"::(GC roots)", "::(Builtins)",
"::(KeyedLoadIC_Slow builtin)"};
const v8::HeapGraphNode* 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(CcTest::isolate());
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);
// In lite mode, there is feedback and feedback metadata.
unsigned int num_nodes = (i::FLAG_lite_mode) ? 6 : 8;
// Without forced source position collection, there is no source position
// table.
if (i::FLAG_enable_lazy_source_positions) num_nodes -= 1;
CHECK_GE(node->allocation_count(), num_nodes);
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(CcTest::isolate());
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(CcTest::isolate());
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(CcTest::isolate());
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"
"%PrepareFunctionForOptimization(foo);"
"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(prop->GetType() == v8::HeapGraphEdge::kInternal ||
prop->GetType() == v8::HeapGraphEdge::kWeak);
}
}
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);
}
}
TEST(HeapSnapshotScriptContext) {
LocalContext env;
v8::HandleScope scope(env->GetIsolate());
v8::HeapProfiler* heap_profiler = env->GetIsolate()->GetHeapProfiler();
CompileRun("class Foo{}; const foo = new Foo();");
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* script_context_table =
GetProperty(env->GetIsolate(), native_context,
v8::HeapGraphEdge::kInternal, "script_context_table");
CHECK(script_context_table);
bool found_foo = false;
for (int i = 0, count = script_context_table->GetChildrenCount(); i < count;
++i) {
const v8::HeapGraphNode* context =
script_context_table->GetChild(i)->GetToNode();
const v8::HeapGraphNode* foo = GetProperty(
env->GetIsolate(), context, v8::HeapGraphEdge::kContextVariable, "foo");
if (foo) {
found_foo = true;
}
}
CHECK(found_foo);
}
class EmbedderNode : public v8::EmbedderGraph::Node {
public:
EmbedderNode(const char* name, size_t size,
v8::EmbedderGraph::Node* wrapper_node = nullptr)
: name_(name), size_(size), wrapper_node_(wrapper_node) {}
// Graph::Node overrides.
const char* Name() override { return name_; }
size_t SizeInBytes() override { return size_; }
Node* WrapperNode() override { return wrapper_node_; }
private:
const char* name_;
size_t size_;
Node* wrapper_node_;
};
class EmbedderRootNode : public EmbedderNode {
public:
explicit EmbedderRootNode(const char* name) : EmbedderNode(name, 0) {}
// Graph::Node override.
bool IsRootNode() override { 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,
void* data) {
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) {
i::FLAG_heap_profiler_use_embedder_graph = true;
LocalContext env;
v8::HandleScope scope(env->GetIsolate());
i::Isolate* isolate = reinterpret_cast<i::Isolate*>(env->GetIsolate());
v8::Local<v8::Value> global_object =
v8::Utils::ToLocal(i::Handle<i::JSObject>(
(isolate->context().native_context().global_object()), isolate));
global_object_pointer = &global_object;
v8::HeapProfiler* heap_profiler = env->GetIsolate()->GetHeapProfiler();
heap_profiler->AddBuildEmbedderGraphCallback(BuildEmbedderGraph, nullptr);
const v8::HeapSnapshot* snapshot = heap_profiler->TakeHeapSnapshot();
CHECK(ValidateSnapshot(snapshot));
CheckEmbedderGraphSnapshot(env->GetIsolate(), snapshot);
}
void BuildEmbedderGraphWithNamedEdges(v8::Isolate* v8_isolate,
v8::EmbedderGraph* graph, void* data) {
using Node = v8::EmbedderGraph::Node;
Node* global_node = graph->V8Node(*global_object_pointer);
Node* embedder_node_A = graph->AddNode(
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)));
graph->AddEdge(global_node, embedder_node_A, "global_to_a");
graph->AddEdge(embedder_node_A, embedder_node_B, "a_to_b");
graph->AddEdge(embedder_node_B, embedder_node_C);
}
void CheckEmbedderGraphWithNamedEdges(v8::Isolate* isolate,
const v8::HeapSnapshot* snapshot) {
const v8::HeapGraphNode* global = GetGlobalObject(snapshot);
const v8::HeapGraphEdge* global_to_a =
GetEdgeByChildName(global, "EmbedderNodeA");
CHECK(global_to_a);
CHECK_EQ(v8::HeapGraphEdge::kInternal, global_to_a->GetType());
CHECK(global_to_a->GetName()->IsString());
CHECK_EQ(0, strcmp("global_to_a", GetName(global_to_a)));
const v8::HeapGraphNode* embedder_node_A = global_to_a->GetToNode();
CHECK_EQ(0, strcmp("EmbedderNodeA", GetName(embedder_node_A)));
CHECK_EQ(10, GetSize(embedder_node_A));
const v8::HeapGraphEdge* a_to_b =
GetEdgeByChildName(embedder_node_A, "EmbedderNodeB");
CHECK(a_to_b);
CHECK(a_to_b->GetName()->IsString());
CHECK_EQ(0, strcmp("a_to_b", GetName(a_to_b)));
CHECK_EQ(v8::HeapGraphEdge::kInternal, a_to_b->GetType());
const v8::HeapGraphNode* embedder_node_B = a_to_b->GetToNode();
CHECK_EQ(0, strcmp("EmbedderNodeB", GetName(embedder_node_B)));
CHECK_EQ(20, GetSize(embedder_node_B));
const v8::HeapGraphEdge* b_to_c =
GetEdgeByChildName(embedder_node_B, "EmbedderNodeC");
CHECK(b_to_c);
CHECK(b_to_c->GetName()->IsNumber());
CHECK_EQ(v8::HeapGraphEdge::kElement, b_to_c->GetType());
const v8::HeapGraphNode* embedder_node_C = b_to_c->GetToNode();
CHECK_EQ(0, strcmp("EmbedderNodeC", GetName(embedder_node_C)));
CHECK_EQ(30, GetSize(embedder_node_C));
}
TEST(EmbedderGraphWithNamedEdges) {
i::FLAG_heap_profiler_use_embedder_graph = true;
LocalContext env;
v8::HandleScope scope(env->GetIsolate());
i::Isolate* isolate = reinterpret_cast<i::Isolate*>(env->GetIsolate());
v8::Local<v8::Value> global_object =
v8::Utils::ToLocal(i::Handle<i::JSObject>(
(isolate->context().native_context().global_object()), isolate));
global_object_pointer = &global_object;
v8::HeapProfiler* heap_profiler = env->GetIsolate()->GetHeapProfiler();
heap_profiler->AddBuildEmbedderGraphCallback(BuildEmbedderGraphWithNamedEdges,
nullptr);
const v8::HeapSnapshot* snapshot = heap_profiler->TakeHeapSnapshot();
CHECK(ValidateSnapshot(snapshot));
CheckEmbedderGraphWithNamedEdges(env->GetIsolate(), snapshot);
}
struct GraphBuildingContext {
int counter = 0;
};
void CheckEmbedderGraphSnapshotWithContext(
v8::Isolate* isolate, const v8::HeapSnapshot* snapshot,
const GraphBuildingContext* context) {
const v8::HeapGraphNode* global = GetGlobalObject(snapshot);
CHECK_GE(context->counter, 1);
CHECK_LE(context->counter, 2);
const v8::HeapGraphNode* embedder_node_A =
GetChildByName(global, "EmbedderNodeA");
CHECK_EQ(10, GetSize(embedder_node_A));
const v8::HeapGraphNode* embedder_node_B =
GetChildByName(global, "EmbedderNodeB");
if (context->counter == 2) {
CHECK_NOT_NULL(embedder_node_B);
CHECK_EQ(20, GetSize(embedder_node_B));
} else {
CHECK_NULL(embedder_node_B);
}
}
void BuildEmbedderGraphWithContext(v8::Isolate* v8_isolate,
v8::EmbedderGraph* graph, void* data) {
using Node = v8::EmbedderGraph::Node;
GraphBuildingContext* context = static_cast<GraphBuildingContext*>(data);
Node* global_node = graph->V8Node(*global_object_pointer);
CHECK_GE(context->counter, 0);
CHECK_LE(context->counter, 1);
switch (context->counter++) {
case 0: {
Node* embedder_node_A = graph->AddNode(
std::unique_ptr<Node>(new EmbedderNode("EmbedderNodeA", 10)));
graph->AddEdge(global_node, embedder_node_A);
break;
}
case 1: {
Node* embedder_node_B = graph->AddNode(
std::unique_ptr<Node>(new EmbedderNode("EmbedderNodeB", 20)));
graph->AddEdge(global_node, embedder_node_B);
break;
}
}
}
TEST(EmbedderGraphMultipleCallbacks) {
i::FLAG_heap_profiler_use_embedder_graph = true;
LocalContext env;
v8::HandleScope scope(env->GetIsolate());
i::Isolate* isolate = reinterpret_cast<i::Isolate*>(env->GetIsolate());
v8::Local<v8::Value> global_object =
v8::Utils::ToLocal(i::Handle<i::JSObject>(
(isolate->context().native_context().global_object()), isolate));
global_object_pointer = &global_object;
v8::HeapProfiler* heap_profiler = env->GetIsolate()->GetHeapProfiler();
GraphBuildingContext context;
heap_profiler->AddBuildEmbedderGraphCallback(BuildEmbedderGraphWithContext,
&context);
heap_profiler->AddBuildEmbedderGraphCallback(BuildEmbedderGraphWithContext,
&context);
const v8::HeapSnapshot* snapshot = heap_profiler->TakeHeapSnapshot();
CHECK_EQ(context.counter, 2);
CHECK(ValidateSnapshot(snapshot));
CheckEmbedderGraphSnapshotWithContext(env->GetIsolate(), snapshot, &context);
heap_profiler->RemoveBuildEmbedderGraphCallback(BuildEmbedderGraphWithContext,
&context);
context.counter = 0;
snapshot = heap_profiler->TakeHeapSnapshot();
CHECK_EQ(context.counter, 1);
CHECK(ValidateSnapshot(snapshot));
CheckEmbedderGraphSnapshotWithContext(env->GetIsolate(), snapshot, &context);
}
TEST(StrongHandleAnnotation) {
LocalContext env;
v8::HandleScope scope(env->GetIsolate());
v8::Persistent<v8::Object> handle1, handle2;
handle1.Reset(env->GetIsolate(), v8::Object::New(env->GetIsolate()));
handle2.Reset(env->GetIsolate(), v8::Object::New(env->GetIsolate()));
handle1.AnnotateStrongRetainer("my_label");
handle2.AnnotateStrongRetainer("my_label");
v8::HeapProfiler* heap_profiler = env->GetIsolate()->GetHeapProfiler();
const v8::HeapSnapshot* snapshot = heap_profiler->TakeHeapSnapshot();
const v8::HeapGraphNode* gc_roots = GetRootChild(snapshot, "(GC roots)");
CHECK(gc_roots);
const v8::HeapGraphNode* global_handles =
GetChildByName(gc_roots, "(Global handles)");
CHECK(global_handles);
int found = 0;
for (int i = 0, count = global_handles->GetChildrenCount(); i < count; ++i) {
const v8::HeapGraphEdge* edge = global_handles->GetChild(i);
v8::String::Utf8Value edge_name(CcTest::isolate(), edge->GetName());
if (EndsWith(*edge_name, "my_label")) ++found;
}
CHECK_EQ(2, found);
}
void BuildEmbedderGraphWithWrapperNode(v8::Isolate* v8_isolate,
v8::EmbedderGraph* graph, void* data) {
using Node = v8::EmbedderGraph::Node;
Node* global_node = graph->V8Node(*global_object_pointer);
Node* wrapper_node = graph->AddNode(
std::unique_ptr<Node>(new EmbedderNode("WrapperNode / TAG", 10)));
Node* embedder_node = graph->AddNode(std::unique_ptr<Node>(
new EmbedderNode("EmbedderNode", 10, wrapper_node)));
Node* other_node =
graph->AddNode(std::unique_ptr<Node>(new EmbedderNode("OtherNode", 20)));
graph->AddEdge(global_node, embedder_node);
graph->AddEdge(wrapper_node, other_node);
Node* wrapper_node2 = graph->AddNode(
std::unique_ptr<Node>(new EmbedderNode("WrapperNode2", 10)));
Node* embedder_node2 = graph->AddNode(std::unique_ptr<Node>(
new EmbedderNode("EmbedderNode2", 10, wrapper_node2)));
graph->AddEdge(global_node, embedder_node2);
graph->AddEdge(embedder_node2, wrapper_node2);
graph->AddEdge(wrapper_node2, other_node);
}
TEST(EmbedderGraphWithWrapperNode) {
i::FLAG_heap_profiler_use_embedder_graph = true;
LocalContext env;
v8::HandleScope scope(env->GetIsolate());
i::Isolate* isolate = reinterpret_cast<i::Isolate*>(env->GetIsolate());
v8::Local<v8::Value> global_object =
v8::Utils::ToLocal(i::Handle<i::JSObject>(
(isolate->context().native_context().global_object()), isolate));
global_object_pointer = &global_object;
v8::HeapProfiler* heap_profiler = env->GetIsolate()->GetHeapProfiler();
heap_profiler->AddBuildEmbedderGraphCallback(
BuildEmbedderGraphWithWrapperNode, nullptr);
const v8::HeapSnapshot* snapshot = heap_profiler->TakeHeapSnapshot();
CHECK(ValidateSnapshot(snapshot));
const v8::HeapGraphNode* global = GetGlobalObject(snapshot);
const v8::HeapGraphNode* embedder_node =
GetChildByName(global, "EmbedderNode / TAG");
const v8::HeapGraphNode* other_node =
GetChildByName(embedder_node, "OtherNode");
CHECK(other_node);
const v8::HeapGraphNode* wrapper_node =
GetChildByName(embedder_node, "WrapperNode / TAG");
CHECK(!wrapper_node);
const v8::HeapGraphNode* embedder_node2 =
GetChildByName(global, "EmbedderNode2");
other_node = GetChildByName(embedder_node2, "OtherNode");
CHECK(other_node);
const v8::HeapGraphNode* wrapper_node2 =
GetChildByName(embedder_node, "WrapperNode2");
CHECK(!wrapper_node2);
}
class EmbedderNodeWithPrefix : public v8::EmbedderGraph::Node {
public:
EmbedderNodeWithPrefix(const char* prefix, const char* name)
: prefix_(prefix), name_(name) {}
// Graph::Node overrides.
const char* Name() override { return name_; }
size_t SizeInBytes() override { return 0; }
const char* NamePrefix() override { return prefix_; }
private:
const char* prefix_;
const char* name_;
};
void BuildEmbedderGraphWithPrefix(v8::Isolate* v8_isolate,
v8::EmbedderGraph* graph, void* data) {
using Node = v8::EmbedderGraph::Node;
Node* global_node = graph->V8Node(*global_object_pointer);
Node* node = graph->AddNode(
std::unique_ptr<Node>(new EmbedderNodeWithPrefix("Detached", "Node")));
graph->AddEdge(global_node, node);
}
TEST(EmbedderGraphWithPrefix) {
i::FLAG_heap_profiler_use_embedder_graph = true;
LocalContext env;
v8::HandleScope scope(env->GetIsolate());
i::Isolate* isolate = reinterpret_cast<i::Isolate*>(env->GetIsolate());
v8::Local<v8::Value> global_object =
v8::Utils::ToLocal(i::Handle<i::JSObject>(
(isolate->context().native_context().global_object()), isolate));
global_object_pointer = &global_object;
v8::HeapProfiler* heap_profiler = env->GetIsolate()->GetHeapProfiler();
heap_profiler->AddBuildEmbedderGraphCallback(BuildEmbedderGraphWithPrefix,
nullptr);
const v8::HeapSnapshot* snapshot = heap_profiler->TakeHeapSnapshot();
CHECK(ValidateSnapshot(snapshot));
const v8::HeapGraphNode* global = GetGlobalObject(snapshot);
const v8::HeapGraphNode* node = GetChildByName(global, "Detached Node");
CHECK(node);
}
static inline i::Address ToAddress(int n) { return static_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, // NOLINT(runtime/references)
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);
}
}
static int NumberOfAllocations(const v8::AllocationProfile::Node* node) {
int count = 0;
for (auto allocation : node->allocations) {
count += allocation.count;
}
return count;
}
static const char* simple_sampling_heap_profiler_script =
"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();";
TEST(SamplingHeapProfiler) {
v8::HandleScope scope(CcTest::isolate());
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;
// Sample should be empty if requested before sampling has started.
{
v8::AllocationProfile* profile = heap_profiler->GetAllocationProfile();
CHECK_NULL(profile);
}
{
heap_profiler->StartSamplingHeapProfiler(1024);
CompileRun(simple_sampling_heap_profiler_script);
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);
heap_profiler->StopSamplingHeapProfiler();
}
// Samples should get cleared once sampling is stopped.
{
v8::AllocationProfile* profile = heap_profiler->GetAllocationProfile();
CHECK_NULL(profile);
}
// 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(SamplingHeapProfilerRateAgnosticEstimates) {
v8::HandleScope scope(CcTest::isolate());
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;
// Disable compilation cache to force compilation in both cases
v8::internal::FLAG_compilation_cache = false;
// Suppress randomness to avoid flakiness in tests.
v8::internal::FLAG_sampling_heap_profiler_suppress_randomness = true;
// stress_incremental_marking adds randomness to the test.
v8::internal::FLAG_stress_incremental_marking = false;
// warmup compilation
CompileRun(simple_sampling_heap_profiler_script);
int count_1024 = 0;
{
heap_profiler->StartSamplingHeapProfiler(1024);
CompileRun(simple_sampling_heap_profiler_script);
std::unique_ptr<v8::AllocationProfile> profile(
heap_profiler->GetAllocationProfile());
CHECK(profile);
const char* path_to_foo[] = {"", "foo"};
auto node_foo = FindAllocationProfileNode(env->GetIsolate(), *profile,
ArrayVector(path_to_foo));
CHECK(node_foo);
const char* path_to_bar[] = {"", "foo", "bar"};
auto node_bar = FindAllocationProfileNode(env->GetIsolate(), *profile,
ArrayVector(path_to_bar));
CHECK(node_bar);
// Function bar can be inlined in foo.
count_1024 = NumberOfAllocations(node_foo) + NumberOfAllocations(node_bar);
heap_profiler->StopSamplingHeapProfiler();
}
// Sampling at a higher rate should give us similar numbers of objects.
{
heap_profiler->StartSamplingHeapProfiler(128);
CompileRun(simple_sampling_heap_profiler_script);
std::unique_ptr<v8::AllocationProfile> profile(
heap_profiler->GetAllocationProfile());
CHECK(profile);
const char* path_to_foo[] = {"", "foo"};
auto node_foo = FindAllocationProfileNode(env->GetIsolate(), *profile,
ArrayVector(path_to_foo));
CHECK(node_foo);
const char* path_to_bar[] = {"", "foo", "bar"};
auto node_bar = FindAllocationProfileNode(env->GetIsolate(), *profile,
ArrayVector(path_to_bar));
CHECK(node_bar);
// Function bar can be inlined in foo.
int count_128 =
NumberOfAllocations(node_foo) + NumberOfAllocations(node_bar);
// 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, 0.1);
heap_profiler->StopSamplingHeapProfiler();
}
}
TEST(SamplingHeapProfilerApiAllocation) {
v8::HandleScope scope(CcTest::isolate());
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(SamplingHeapProfilerApiSamples) {
v8::HandleScope scope(CcTest::isolate());
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(1024);
size_t count = 8 * 1024;
for (size_t i = 0; i < count; ++i) v8::Object::New(env->GetIsolate());
std::unique_ptr<v8::AllocationProfile> profile(
heap_profiler->GetAllocationProfile());
CHECK(profile);
std::vector<v8::AllocationProfile::Node*> nodes_to_visit;
std::unordered_set<uint32_t> node_ids;
nodes_to_visit.push_back(profile->GetRootNode());
while (!nodes_to_visit.empty()) {
v8::AllocationProfile::Node* node = nodes_to_visit.back();
nodes_to_visit.pop_back();
CHECK_LT(0, node->node_id);
CHECK_EQ(0, node_ids.count(node->node_id));
node_ids.insert(node->node_id);
nodes_to_visit.insert(nodes_to_visit.end(), node->children.begin(),
node->children.end());
}
size_t total_size = 0;
std::unordered_set<uint64_t> samples_set;
for (auto& sample : profile->GetSamples()) {
total_size += sample.size * sample.count;
CHECK_EQ(0, samples_set.count(sample.sample_id));
CHECK_EQ(1, node_ids.count(sample.node_id));
CHECK_GT(sample.node_id, 0);
CHECK_GT(sample.sample_id, 0);
samples_set.insert(sample.sample_id);
}
size_t object_size = total_size / count;
CHECK_GE(object_size, sizeof(void*) * 2);
heap_profiler->StopSamplingHeapProfiler();
}
TEST(SamplingHeapProfilerLeftTrimming) {
v8::HandleScope scope(CcTest::isolate());
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(CcTest::isolate());
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];"
"};"
"%%PrepareFunctionForOptimization(f);"
"f(); gc();"
"f(); f();"
"%%OptimizeFunctionOnNextCall(f);"
"f();"
"f;",
i::AllocationSite::kPretenureMinimumCreated + 1);
v8::Local<v8::Function> f =
v8::Local<v8::Function>::Cast(CompileRun(source.begin()));
// 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(CcTest::isolate());
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(CcTest::isolate());
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::kTaggedSize);
// 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);"
" };"
" %PrepareFunctionForOptimization(lazyDeopt);"
" 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();
}
TEST(WeakReference) {
v8::Isolate* isolate = CcTest::isolate();
i::Isolate* i_isolate = CcTest::i_isolate();
i::Factory* factory = i_isolate->factory();
i::HandleScope scope(i_isolate);
LocalContext env;
// Create a FeedbackVector.
v8::Local<v8::Script> script =
v8::Script::Compile(isolate->GetCurrentContext(),
v8::String::NewFromUtf8(isolate, "function foo() {}",
v8::NewStringType::kNormal)
.ToLocalChecked())
.ToLocalChecked();
v8::MaybeLocal<v8::Value> value = script->Run(isolate->GetCurrentContext());
CHECK(!value.IsEmpty());
i::Handle<i::Object> obj = v8::Utils::OpenHandle(*script);
i::Handle<i::SharedFunctionInfo> shared_function =
i::Handle<i::SharedFunctionInfo>(i::JSFunction::cast(*obj).shared(),
i_isolate);
i::Handle<i::ClosureFeedbackCellArray> feedback_cell_array =
i::ClosureFeedbackCellArray::New(i_isolate, shared_function);
i::Handle<i::FeedbackVector> fv =
factory->NewFeedbackVector(shared_function, feedback_cell_array);
// Create a Code.
i::Assembler assm(i::AssemblerOptions{});
assm.nop(); // supported on all architectures
i::CodeDesc desc;
assm.GetCode(i_isolate, &desc);
i::Handle<i::Code> code =
i::Factory::CodeBuilder(i_isolate, desc, i::Code::STUB).Build();
CHECK(code->IsCode());
fv->set_optimized_code_weak_or_smi(i::HeapObjectReference::Weak(*code));
v8::HeapProfiler* heap_profiler = isolate->GetHeapProfiler();
const v8::HeapSnapshot* snapshot = heap_profiler->TakeHeapSnapshot();
CHECK(ValidateSnapshot(snapshot));
}
TEST(Bug8373_1) {
LocalContext env;
v8::HandleScope scope(env->GetIsolate());
v8::HeapProfiler* heap_profiler = env->GetIsolate()->GetHeapProfiler();
heap_profiler->StartSamplingHeapProfiler(100);
heap_profiler->TakeHeapSnapshot();
// Causes the StringsStorage to be deleted.
heap_profiler->DeleteAllHeapSnapshots();
// Triggers an allocation sample that tries to use the StringsStorage.
for (int i = 0; i < 2 * 1024; ++i) {
CompileRun(
"new Array(64);"
"new Uint8Array(16);");
}
heap_profiler->StopSamplingHeapProfiler();
}
TEST(Bug8373_2) {
LocalContext env;
v8::HandleScope scope(env->GetIsolate());
v8::HeapProfiler* heap_profiler = env->GetIsolate()->GetHeapProfiler();
heap_profiler->StartTrackingHeapObjects(true);
heap_profiler->TakeHeapSnapshot();
// Causes the StringsStorage to be deleted.
heap_profiler->DeleteAllHeapSnapshots();
// Triggers an allocations that try to use the StringsStorage.
for (int i = 0; i < 2 * 1024; ++i) {
CompileRun(
"new Array(64);"
"new Uint8Array(16);");
}
heap_profiler->StopTrackingHeapObjects();
}
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