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v8/test/cctest/test-cpu-profiler.cc
yurys@chromium.org 6ba502fa4d Simplify sampling rate calculation 
Sampling rate is now calculated as total number of samples divided by profiling time in ms. Before the patch the sampling rate was updated once per 100ms which doesn't have any obvious advantage over the simpler method.

Also we are going to get rid of the profile node self and total time calculation in the v8 CPU profiler and only expose profiling start/end time for CpuProfile and number of ticks on each ProfileNode and let clients do all the math should they need it.

BUG=None
R=bmeurer@chromium.org, loislo@chromium.org

Review URL: https://codereview.chromium.org/21105003

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@15944 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
2013-07-30 07:01:16 +00:00

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// Copyright 2010 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 of profiles generator and utilities.
#include "v8.h"
#include "cpu-profiler-inl.h"
#include "cctest.h"
#include "platform.h"
#include "utils.h"
#include "../include/v8-profiler.h"
using i::CodeEntry;
using i::CpuProfile;
using i::CpuProfiler;
using i::CpuProfilesCollection;
using i::Heap;
using i::ProfileGenerator;
using i::ProfileNode;
using i::ProfilerEventsProcessor;
using i::ScopedVector;
using i::Vector;
TEST(StartStop) {
CpuProfilesCollection profiles;
ProfileGenerator generator(&profiles);
ProfilerEventsProcessor processor(&generator);
processor.Start();
processor.StopSynchronously();
processor.Join();
}
static inline i::Address ToAddress(int n) {
return reinterpret_cast<i::Address>(n);
}
static void EnqueueTickSampleEvent(ProfilerEventsProcessor* proc,
i::Address frame1,
i::Address frame2 = NULL,
i::Address frame3 = NULL) {
i::TickSample* sample = proc->TickSampleEvent();
sample->pc = frame1;
sample->tos = frame1;
sample->frames_count = 0;
if (frame2 != NULL) {
sample->stack[0] = frame2;
sample->frames_count = 1;
}
if (frame3 != NULL) {
sample->stack[1] = frame3;
sample->frames_count = 2;
}
}
namespace {
class TestSetup {
public:
TestSetup()
: old_flag_prof_browser_mode_(i::FLAG_prof_browser_mode) {
i::FLAG_prof_browser_mode = false;
}
~TestSetup() {
i::FLAG_prof_browser_mode = old_flag_prof_browser_mode_;
}
private:
bool old_flag_prof_browser_mode_;
};
} // namespace
i::Code* CreateCode(LocalContext* env) {
static int counter = 0;
i::EmbeddedVector<char, 256> script;
i::EmbeddedVector<char, 32> name;
i::OS::SNPrintF(name, "function_%d", ++counter);
const char* name_start = name.start();
i::OS::SNPrintF(script,
"function %s() {\n"
"var counter = 0;\n"
"for (var i = 0; i < %d; ++i) counter += i;\n"
"return '%s_' + counter;\n"
"}\n"
"%s();\n", name_start, counter, name_start, name_start);
CompileRun(script.start());
i::Handle<i::JSFunction> fun = v8::Utils::OpenHandle(
*v8::Local<v8::Function>::Cast(
(*env)->Global()->Get(v8_str(name_start))));
return fun->code();
}
TEST(CodeEvents) {
CcTest::InitializeVM();
LocalContext env;
i::Isolate* isolate = i::Isolate::Current();
i::Factory* factory = isolate->factory();
TestSetup test_setup;
i::HandleScope scope(isolate);
i::Code* aaa_code = CreateCode(&env);
i::Code* comment_code = CreateCode(&env);
i::Code* args5_code = CreateCode(&env);
i::Code* comment2_code = CreateCode(&env);
i::Code* moved_code = CreateCode(&env);
i::Code* args3_code = CreateCode(&env);
i::Code* args4_code = CreateCode(&env);
CpuProfilesCollection* profiles = new CpuProfilesCollection;
profiles->StartProfiling("", 1, false);
ProfileGenerator generator(profiles);
ProfilerEventsProcessor processor(&generator);
processor.Start();
CpuProfiler profiler(isolate, profiles, &generator, &processor);
// Enqueue code creation events.
const char* aaa_str = "aaa";
i::Handle<i::String> aaa_name = factory->NewStringFromAscii(
i::Vector<const char>(aaa_str, i::StrLength(aaa_str)));
profiler.CodeCreateEvent(i::Logger::FUNCTION_TAG, aaa_code, *aaa_name);
profiler.CodeCreateEvent(i::Logger::BUILTIN_TAG, comment_code, "comment");
profiler.CodeCreateEvent(i::Logger::STUB_TAG, args5_code, 5);
profiler.CodeCreateEvent(i::Logger::BUILTIN_TAG, comment2_code, "comment2");
profiler.CodeMoveEvent(comment2_code->address(), moved_code->address());
profiler.CodeCreateEvent(i::Logger::STUB_TAG, args3_code, 3);
profiler.CodeCreateEvent(i::Logger::STUB_TAG, args4_code, 4);
// Enqueue a tick event to enable code events processing.
EnqueueTickSampleEvent(&processor, aaa_code->address());
processor.StopSynchronously();
processor.Join();
// Check the state of profile generator.
CodeEntry* aaa = generator.code_map()->FindEntry(aaa_code->address());
CHECK_NE(NULL, aaa);
CHECK_EQ(aaa_str, aaa->name());
CodeEntry* comment = generator.code_map()->FindEntry(comment_code->address());
CHECK_NE(NULL, comment);
CHECK_EQ("comment", comment->name());
CodeEntry* args5 = generator.code_map()->FindEntry(args5_code->address());
CHECK_NE(NULL, args5);
CHECK_EQ("5", args5->name());
CHECK_EQ(NULL, generator.code_map()->FindEntry(comment2_code->address()));
CodeEntry* comment2 = generator.code_map()->FindEntry(moved_code->address());
CHECK_NE(NULL, comment2);
CHECK_EQ("comment2", comment2->name());
}
template<typename T>
static int CompareProfileNodes(const T* p1, const T* p2) {
return strcmp((*p1)->entry()->name(), (*p2)->entry()->name());
}
TEST(TickEvents) {
TestSetup test_setup;
LocalContext env;
i::Isolate* isolate = i::Isolate::Current();
i::HandleScope scope(isolate);
i::Code* frame1_code = CreateCode(&env);
i::Code* frame2_code = CreateCode(&env);
i::Code* frame3_code = CreateCode(&env);
CpuProfilesCollection* profiles = new CpuProfilesCollection;
profiles->StartProfiling("", 1, false);
ProfileGenerator generator(profiles);
ProfilerEventsProcessor processor(&generator);
processor.Start();
CpuProfiler profiler(isolate, profiles, &generator, &processor);
profiler.CodeCreateEvent(i::Logger::BUILTIN_TAG, frame1_code, "bbb");
profiler.CodeCreateEvent(i::Logger::STUB_TAG, frame2_code, 5);
profiler.CodeCreateEvent(i::Logger::BUILTIN_TAG, frame3_code, "ddd");
EnqueueTickSampleEvent(&processor, frame1_code->instruction_start());
EnqueueTickSampleEvent(
&processor,
frame2_code->instruction_start() + frame2_code->ExecutableSize() / 2,
frame1_code->instruction_start() + frame2_code->ExecutableSize() / 2);
EnqueueTickSampleEvent(
&processor,
frame3_code->instruction_end() - 1,
frame2_code->instruction_end() - 1,
frame1_code->instruction_end() - 1);
processor.StopSynchronously();
processor.Join();
CpuProfile* profile = profiles->StopProfiling("");
CHECK_NE(NULL, profile);
// Check call trees.
const i::List<ProfileNode*>* top_down_root_children =
profile->top_down()->root()->children();
CHECK_EQ(1, top_down_root_children->length());
CHECK_EQ("bbb", top_down_root_children->last()->entry()->name());
const i::List<ProfileNode*>* top_down_bbb_children =
top_down_root_children->last()->children();
CHECK_EQ(1, top_down_bbb_children->length());
CHECK_EQ("5", top_down_bbb_children->last()->entry()->name());
const i::List<ProfileNode*>* top_down_stub_children =
top_down_bbb_children->last()->children();
CHECK_EQ(1, top_down_stub_children->length());
CHECK_EQ("ddd", top_down_stub_children->last()->entry()->name());
const i::List<ProfileNode*>* top_down_ddd_children =
top_down_stub_children->last()->children();
CHECK_EQ(0, top_down_ddd_children->length());
}
// http://crbug/51594
// This test must not crash.
TEST(CrashIfStoppingLastNonExistentProfile) {
CcTest::InitializeVM();
TestSetup test_setup;
CpuProfiler* profiler = i::Isolate::Current()->cpu_profiler();
profiler->StartProfiling("1");
profiler->StopProfiling("2");
profiler->StartProfiling("1");
profiler->StopProfiling("");
}
// http://code.google.com/p/v8/issues/detail?id=1398
// Long stacks (exceeding max frames limit) must not be erased.
TEST(Issue1398) {
TestSetup test_setup;
LocalContext env;
i::Isolate* isolate = i::Isolate::Current();
i::HandleScope scope(isolate);
i::Code* code = CreateCode(&env);
CpuProfilesCollection* profiles = new CpuProfilesCollection;
profiles->StartProfiling("", 1, false);
ProfileGenerator generator(profiles);
ProfilerEventsProcessor processor(&generator);
processor.Start();
CpuProfiler profiler(isolate, profiles, &generator, &processor);
profiler.CodeCreateEvent(i::Logger::BUILTIN_TAG, code, "bbb");
i::TickSample* sample = processor.TickSampleEvent();
sample->pc = code->address();
sample->tos = 0;
sample->frames_count = i::TickSample::kMaxFramesCount;
for (int i = 0; i < sample->frames_count; ++i) {
sample->stack[i] = code->address();
}
processor.StopSynchronously();
processor.Join();
CpuProfile* profile = profiles->StopProfiling("");
CHECK_NE(NULL, profile);
int actual_depth = 0;
const ProfileNode* node = profile->top_down()->root();
while (node->children()->length() > 0) {
node = node->children()->last();
++actual_depth;
}
CHECK_EQ(1 + i::TickSample::kMaxFramesCount, actual_depth); // +1 for PC.
}
TEST(DeleteAllCpuProfiles) {
CcTest::InitializeVM();
TestSetup test_setup;
CpuProfiler* profiler = i::Isolate::Current()->cpu_profiler();
CHECK_EQ(0, profiler->GetProfilesCount());
profiler->DeleteAllProfiles();
CHECK_EQ(0, profiler->GetProfilesCount());
profiler->StartProfiling("1");
profiler->StopProfiling("1");
CHECK_EQ(1, profiler->GetProfilesCount());
profiler->DeleteAllProfiles();
CHECK_EQ(0, profiler->GetProfilesCount());
profiler->StartProfiling("1");
profiler->StartProfiling("2");
profiler->StopProfiling("2");
profiler->StopProfiling("1");
CHECK_EQ(2, profiler->GetProfilesCount());
profiler->DeleteAllProfiles();
CHECK_EQ(0, profiler->GetProfilesCount());
// Test profiling cancellation by the 'delete' command.
profiler->StartProfiling("1");
profiler->StartProfiling("2");
CHECK_EQ(0, profiler->GetProfilesCount());
profiler->DeleteAllProfiles();
CHECK_EQ(0, profiler->GetProfilesCount());
}
static const v8::CpuProfile* FindCpuProfile(v8::CpuProfiler* profiler,
unsigned uid) {
int length = profiler->GetProfileCount();
for (int i = 0; i < length; i++) {
const v8::CpuProfile* profile = profiler->GetCpuProfile(i);
if (profile->GetUid() == uid) {
return profile;
}
}
return NULL;
}
TEST(DeleteCpuProfile) {
LocalContext env;
v8::HandleScope scope(env->GetIsolate());
v8::CpuProfiler* cpu_profiler = env->GetIsolate()->GetCpuProfiler();
CHECK_EQ(0, cpu_profiler->GetProfileCount());
v8::Local<v8::String> name1 = v8::String::New("1");
cpu_profiler->StartCpuProfiling(name1);
const v8::CpuProfile* p1 = cpu_profiler->StopCpuProfiling(name1);
CHECK_NE(NULL, p1);
CHECK_EQ(1, cpu_profiler->GetProfileCount());
unsigned uid1 = p1->GetUid();
CHECK_EQ(p1, FindCpuProfile(cpu_profiler, uid1));
const_cast<v8::CpuProfile*>(p1)->Delete();
CHECK_EQ(0, cpu_profiler->GetProfileCount());
CHECK_EQ(NULL, FindCpuProfile(cpu_profiler, uid1));
v8::Local<v8::String> name2 = v8::String::New("2");
cpu_profiler->StartCpuProfiling(name2);
const v8::CpuProfile* p2 = cpu_profiler->StopCpuProfiling(name2);
CHECK_NE(NULL, p2);
CHECK_EQ(1, cpu_profiler->GetProfileCount());
unsigned uid2 = p2->GetUid();
CHECK_NE(static_cast<int>(uid1), static_cast<int>(uid2));
CHECK_EQ(p2, FindCpuProfile(cpu_profiler, uid2));
CHECK_EQ(NULL, FindCpuProfile(cpu_profiler, uid1));
v8::Local<v8::String> name3 = v8::String::New("3");
cpu_profiler->StartCpuProfiling(name3);
const v8::CpuProfile* p3 = cpu_profiler->StopCpuProfiling(name3);
CHECK_NE(NULL, p3);
CHECK_EQ(2, cpu_profiler->GetProfileCount());
unsigned uid3 = p3->GetUid();
CHECK_NE(static_cast<int>(uid1), static_cast<int>(uid3));
CHECK_EQ(p3, FindCpuProfile(cpu_profiler, uid3));
CHECK_EQ(NULL, FindCpuProfile(cpu_profiler, uid1));
const_cast<v8::CpuProfile*>(p2)->Delete();
CHECK_EQ(1, cpu_profiler->GetProfileCount());
CHECK_EQ(NULL, FindCpuProfile(cpu_profiler, uid2));
CHECK_EQ(p3, FindCpuProfile(cpu_profiler, uid3));
const_cast<v8::CpuProfile*>(p3)->Delete();
CHECK_EQ(0, cpu_profiler->GetProfileCount());
CHECK_EQ(NULL, FindCpuProfile(cpu_profiler, uid3));
CHECK_EQ(NULL, FindCpuProfile(cpu_profiler, uid2));
CHECK_EQ(NULL, FindCpuProfile(cpu_profiler, uid1));
}
TEST(GetProfilerWhenIsolateIsNotInitialized) {
v8::Isolate* isolate = v8::Isolate::GetCurrent();
CHECK(i::Isolate::Current()->IsDefaultIsolate());
CHECK(!i::Isolate::Current()->IsInitialized());
CHECK_EQ(NULL, isolate->GetCpuProfiler());
{
v8::Isolate::Scope isolateScope(isolate);
LocalContext env;
v8::HandleScope scope(isolate);
CHECK_NE(NULL, isolate->GetCpuProfiler());
isolate->GetCpuProfiler()->StartCpuProfiling(v8::String::New("Test"));
isolate->GetCpuProfiler()->StopCpuProfiling(v8::String::New("Test"));
}
CHECK(i::Isolate::Current()->IsInitialized());
CHECK_NE(NULL, isolate->GetCpuProfiler());
isolate->Dispose();
CHECK_EQ(NULL, isolate->GetCpuProfiler());
}
static const v8::CpuProfile* RunProfiler(
LocalContext& env, v8::Handle<v8::Function> function,
v8::Handle<v8::Value> argv[], int argc,
unsigned min_js_samples) {
v8::CpuProfiler* cpu_profiler = env->GetIsolate()->GetCpuProfiler();
v8::Local<v8::String> profile_name = v8::String::New("my_profile");
cpu_profiler->StartCpuProfiling(profile_name);
i::Sampler* sampler =
reinterpret_cast<i::Isolate*>(env->GetIsolate())->logger()->sampler();
sampler->StartCountingSamples();
do {
function->Call(env->Global(), argc, argv);
} while (sampler->js_and_external_sample_count() < min_js_samples);
const v8::CpuProfile* profile = cpu_profiler->StopCpuProfiling(profile_name);
CHECK_NE(NULL, profile);
// Dump collected profile to have a better diagnostic in case of failure.
reinterpret_cast<i::CpuProfile*>(
const_cast<v8::CpuProfile*>(profile))->Print();
return profile;
}
static bool ContainsString(v8::Handle<v8::String> string,
const Vector<v8::Handle<v8::String> >& vector) {
for (int i = 0; i < vector.length(); i++) {
if (string->Equals(vector[i]))
return true;
}
return false;
}
static void CheckChildrenNames(const v8::CpuProfileNode* node,
const Vector<v8::Handle<v8::String> >& names) {
int count = node->GetChildrenCount();
for (int i = 0; i < count; i++) {
v8::Handle<v8::String> name = node->GetChild(i)->GetFunctionName();
CHECK(ContainsString(name, names));
// Check that there are no duplicates.
for (int j = 0; j < count; j++) {
if (j == i) continue;
CHECK_NE(name, node->GetChild(j)->GetFunctionName());
}
}
}
static const v8::CpuProfileNode* FindChild(const v8::CpuProfileNode* node,
const char* name) {
int count = node->GetChildrenCount();
v8::Handle<v8::String> nameHandle = v8::String::New(name);
for (int i = 0; i < count; i++) {
const v8::CpuProfileNode* child = node->GetChild(i);
if (nameHandle->Equals(child->GetFunctionName())) return child;
}
return NULL;
}
static const v8::CpuProfileNode* GetChild(const v8::CpuProfileNode* node,
const char* name) {
const v8::CpuProfileNode* result = FindChild(node, name);
CHECK(result);
return result;
}
static void CheckSimpleBranch(const v8::CpuProfileNode* node,
const char* names[], int length) {
for (int i = 0; i < length; i++) {
const char* name = names[i];
node = GetChild(node, name);
int expectedChildrenCount = (i == length - 1) ? 0 : 1;
CHECK_EQ(expectedChildrenCount, node->GetChildrenCount());
}
}
static const char* cpu_profiler_test_source = "function loop(timeout) {\n"
" this.mmm = 0;\n"
" var start = Date.now();\n"
" while (Date.now() - start < timeout) {\n"
" var n = 100*1000;\n"
" while(n > 1) {\n"
" n--;\n"
" this.mmm += n * n * n;\n"
" }\n"
" }\n"
"}\n"
"function delay() { try { loop(10); } catch(e) { } }\n"
"function bar() { delay(); }\n"
"function baz() { delay(); }\n"
"function foo() {\n"
" try {\n"
" delay();\n"
" bar();\n"
" delay();\n"
" baz();\n"
" } catch (e) { }\n"
"}\n"
"function start(timeout) {\n"
" var start = Date.now();\n"
" do {\n"
" foo();\n"
" var duration = Date.now() - start;\n"
" } while (duration < timeout);\n"
" return duration;\n"
"}\n";
// Check that the profile tree for the script above will look like the
// following:
//
// [Top down]:
// 1062 0 (root) [-1]
// 1054 0 start [-1]
// 1054 1 foo [-1]
// 265 0 baz [-1]
// 265 1 delay [-1]
// 264 264 loop [-1]
// 525 3 delay [-1]
// 522 522 loop [-1]
// 263 0 bar [-1]
// 263 1 delay [-1]
// 262 262 loop [-1]
// 2 2 (program) [-1]
// 6 6 (garbage collector) [-1]
TEST(CollectCpuProfile) {
LocalContext env;
v8::HandleScope scope(env->GetIsolate());
v8::Script::Compile(v8::String::New(cpu_profiler_test_source))->Run();
v8::Local<v8::Function> function = v8::Local<v8::Function>::Cast(
env->Global()->Get(v8::String::New("start")));
int32_t profiling_interval_ms = 200;
v8::Handle<v8::Value> args[] = { v8::Integer::New(profiling_interval_ms) };
const v8::CpuProfile* profile =
RunProfiler(env, function, args, ARRAY_SIZE(args), 200);
function->Call(env->Global(), ARRAY_SIZE(args), args);
const v8::CpuProfileNode* root = profile->GetTopDownRoot();
ScopedVector<v8::Handle<v8::String> > names(3);
names[0] = v8::String::New(ProfileGenerator::kGarbageCollectorEntryName);
names[1] = v8::String::New(ProfileGenerator::kProgramEntryName);
names[2] = v8::String::New("start");
CheckChildrenNames(root, names);
const v8::CpuProfileNode* startNode = GetChild(root, "start");
CHECK_EQ(1, startNode->GetChildrenCount());
const v8::CpuProfileNode* fooNode = GetChild(startNode, "foo");
CHECK_EQ(3, fooNode->GetChildrenCount());
const char* barBranch[] = { "bar", "delay", "loop" };
CheckSimpleBranch(fooNode, barBranch, ARRAY_SIZE(barBranch));
const char* bazBranch[] = { "baz", "delay", "loop" };
CheckSimpleBranch(fooNode, bazBranch, ARRAY_SIZE(bazBranch));
const char* delayBranch[] = { "delay", "loop" };
CheckSimpleBranch(fooNode, delayBranch, ARRAY_SIZE(delayBranch));
v8::CpuProfiler* cpu_profiler = env->GetIsolate()->GetCpuProfiler();
cpu_profiler->DeleteAllCpuProfiles();
}
static const char* cpu_profiler_test_source2 = "function loop() {}\n"
"function delay() { loop(); }\n"
"function start(count) {\n"
" var k = 0;\n"
" do {\n"
" delay();\n"
" } while (++k < count*100*1000);\n"
"}\n";
// Check that the profile tree doesn't contain unexpecte traces:
// - 'loop' can be called only by 'delay'
// - 'delay' may be called only by 'start'
// The profile will look like the following:
//
// [Top down]:
// 135 0 (root) [-1] #1
// 121 72 start [-1] #3
// 49 33 delay [-1] #4
// 16 16 loop [-1] #5
// 14 14 (program) [-1] #2
TEST(SampleWhenFrameIsNotSetup) {
LocalContext env;
v8::HandleScope scope(env->GetIsolate());
v8::Script::Compile(v8::String::New(cpu_profiler_test_source2))->Run();
v8::Local<v8::Function> function = v8::Local<v8::Function>::Cast(
env->Global()->Get(v8::String::New("start")));
int32_t repeat_count = 100;
#if defined(USE_SIMULATOR)
// Simulators are much slower.
repeat_count = 1;
#endif
v8::Handle<v8::Value> args[] = { v8::Integer::New(repeat_count) };
const v8::CpuProfile* profile =
RunProfiler(env, function, args, ARRAY_SIZE(args), 100);
const v8::CpuProfileNode* root = profile->GetTopDownRoot();
ScopedVector<v8::Handle<v8::String> > names(3);
names[0] = v8::String::New(ProfileGenerator::kGarbageCollectorEntryName);
names[1] = v8::String::New(ProfileGenerator::kProgramEntryName);
names[2] = v8::String::New("start");
CheckChildrenNames(root, names);
const v8::CpuProfileNode* startNode = FindChild(root, "start");
// On slow machines there may be no meaningfull samples at all, skip the
// check there.
if (startNode && startNode->GetChildrenCount() > 0) {
CHECK_EQ(1, startNode->GetChildrenCount());
const v8::CpuProfileNode* delayNode = GetChild(startNode, "delay");
if (delayNode->GetChildrenCount() > 0) {
CHECK_EQ(1, delayNode->GetChildrenCount());
GetChild(delayNode, "loop");
}
}
v8::CpuProfiler* cpu_profiler = env->GetIsolate()->GetCpuProfiler();
cpu_profiler->DeleteAllCpuProfiles();
}
static const char* native_accessor_test_source = "function start(count) {\n"
" for (var i = 0; i < count; i++) {\n"
" var o = instance.foo;\n"
" instance.foo = o + 1;\n"
" }\n"
"}\n";
class TestApiCallbacks {
public:
explicit TestApiCallbacks(int min_duration_ms)
: min_duration_ms_(min_duration_ms),
is_warming_up_(false) {}
static void Getter(v8::Local<v8::String> name,
const v8::PropertyCallbackInfo<v8::Value>& info) {
TestApiCallbacks* data = fromInfo(info);
data->Wait();
}
static void Setter(v8::Local<v8::String> name,
v8::Local<v8::Value> value,
const v8::PropertyCallbackInfo<void>& info) {
TestApiCallbacks* data = fromInfo(info);
data->Wait();
}
static void Callback(const v8::FunctionCallbackInfo<v8::Value>& info) {
TestApiCallbacks* data = fromInfo(info);
data->Wait();
}
void set_warming_up(bool value) { is_warming_up_ = value; }
private:
void Wait() {
if (is_warming_up_) return;
double start = i::OS::TimeCurrentMillis();
double duration = 0;
while (duration < min_duration_ms_) {
i::OS::Sleep(1);
duration = i::OS::TimeCurrentMillis() - start;
}
}
template<typename T>
static TestApiCallbacks* fromInfo(const T& info) {
void* data = v8::External::Cast(*info.Data())->Value();
return reinterpret_cast<TestApiCallbacks*>(data);
}
int min_duration_ms_;
bool is_warming_up_;
};
// Test that native accessors are properly reported in the CPU profile.
// This test checks the case when the long-running accessors are called
// only once and the optimizer doesn't have chance to change the invocation
// code.
TEST(NativeAccessorUninitializedIC) {
LocalContext env;
v8::HandleScope scope(env->GetIsolate());
v8::Local<v8::FunctionTemplate> func_template = v8::FunctionTemplate::New();
v8::Local<v8::ObjectTemplate> instance_template =
func_template->InstanceTemplate();
TestApiCallbacks accessors(100);
v8::Local<v8::External> data = v8::External::New(&accessors);
instance_template->SetAccessor(
v8::String::New("foo"), &TestApiCallbacks::Getter,
&TestApiCallbacks::Setter, data);
v8::Local<v8::Function> func = func_template->GetFunction();
v8::Local<v8::Object> instance = func->NewInstance();
env->Global()->Set(v8::String::New("instance"), instance);
v8::Script::Compile(v8::String::New(native_accessor_test_source))->Run();
v8::Local<v8::Function> function = v8::Local<v8::Function>::Cast(
env->Global()->Get(v8::String::New("start")));
int32_t repeat_count = 1;
v8::Handle<v8::Value> args[] = { v8::Integer::New(repeat_count) };
const v8::CpuProfile* profile =
RunProfiler(env, function, args, ARRAY_SIZE(args), 180);
const v8::CpuProfileNode* root = profile->GetTopDownRoot();
const v8::CpuProfileNode* startNode = GetChild(root, "start");
GetChild(startNode, "get foo");
GetChild(startNode, "set foo");
v8::CpuProfiler* cpu_profiler = env->GetIsolate()->GetCpuProfiler();
cpu_profiler->DeleteAllCpuProfiles();
}
// Test that native accessors are properly reported in the CPU profile.
// This test makes sure that the accessors are called enough times to become
// hot and to trigger optimizations.
TEST(NativeAccessorMonomorphicIC) {
LocalContext env;
v8::HandleScope scope(env->GetIsolate());
v8::Local<v8::FunctionTemplate> func_template = v8::FunctionTemplate::New();
v8::Local<v8::ObjectTemplate> instance_template =
func_template->InstanceTemplate();
TestApiCallbacks accessors(1);
v8::Local<v8::External> data = v8::External::New(&accessors);
instance_template->SetAccessor(
v8::String::New("foo"), &TestApiCallbacks::Getter,
&TestApiCallbacks::Setter, data);
v8::Local<v8::Function> func = func_template->GetFunction();
v8::Local<v8::Object> instance = func->NewInstance();
env->Global()->Set(v8::String::New("instance"), instance);
v8::Script::Compile(v8::String::New(native_accessor_test_source))->Run();
v8::Local<v8::Function> function = v8::Local<v8::Function>::Cast(
env->Global()->Get(v8::String::New("start")));
{
// Make sure accessors ICs are in monomorphic state before starting
// profiling.
accessors.set_warming_up(true);
int32_t warm_up_iterations = 3;
v8::Handle<v8::Value> args[] = { v8::Integer::New(warm_up_iterations) };
function->Call(env->Global(), ARRAY_SIZE(args), args);
accessors.set_warming_up(false);
}
int32_t repeat_count = 100;
v8::Handle<v8::Value> args[] = { v8::Integer::New(repeat_count) };
const v8::CpuProfile* profile =
RunProfiler(env, function, args, ARRAY_SIZE(args), 200);
const v8::CpuProfileNode* root = profile->GetTopDownRoot();
const v8::CpuProfileNode* startNode = GetChild(root, "start");
GetChild(startNode, "get foo");
GetChild(startNode, "set foo");
v8::CpuProfiler* cpu_profiler = env->GetIsolate()->GetCpuProfiler();
cpu_profiler->DeleteAllCpuProfiles();
}
static const char* native_method_test_source = "function start(count) {\n"
" for (var i = 0; i < count; i++) {\n"
" instance.fooMethod();\n"
" }\n"
"}\n";
TEST(NativeMethodUninitializedIC) {
LocalContext env;
v8::HandleScope scope(env->GetIsolate());
TestApiCallbacks callbacks(100);
v8::Local<v8::External> data = v8::External::New(&callbacks);
v8::Local<v8::FunctionTemplate> func_template = v8::FunctionTemplate::New();
func_template->SetClassName(v8::String::New("Test_InstanceCostructor"));
v8::Local<v8::ObjectTemplate> proto_template =
func_template->PrototypeTemplate();
v8::Local<v8::Signature> signature = v8::Signature::New(func_template);
proto_template->Set(v8::String::New("fooMethod"), v8::FunctionTemplate::New(
&TestApiCallbacks::Callback, data, signature, 0));
v8::Local<v8::Function> func = func_template->GetFunction();
v8::Local<v8::Object> instance = func->NewInstance();
env->Global()->Set(v8::String::New("instance"), instance);
v8::Script::Compile(v8::String::New(native_method_test_source))->Run();
v8::Local<v8::Function> function = v8::Local<v8::Function>::Cast(
env->Global()->Get(v8::String::New("start")));
int32_t repeat_count = 1;
v8::Handle<v8::Value> args[] = { v8::Integer::New(repeat_count) };
const v8::CpuProfile* profile =
RunProfiler(env, function, args, ARRAY_SIZE(args), 100);
const v8::CpuProfileNode* root = profile->GetTopDownRoot();
const v8::CpuProfileNode* startNode = GetChild(root, "start");
GetChild(startNode, "fooMethod");
v8::CpuProfiler* cpu_profiler = env->GetIsolate()->GetCpuProfiler();
cpu_profiler->DeleteAllCpuProfiles();
}
TEST(NativeMethodMonomorphicIC) {
LocalContext env;
v8::HandleScope scope(env->GetIsolate());
TestApiCallbacks callbacks(1);
v8::Local<v8::External> data = v8::External::New(&callbacks);
v8::Local<v8::FunctionTemplate> func_template = v8::FunctionTemplate::New();
func_template->SetClassName(v8::String::New("Test_InstanceCostructor"));
v8::Local<v8::ObjectTemplate> proto_template =
func_template->PrototypeTemplate();
v8::Local<v8::Signature> signature = v8::Signature::New(func_template);
proto_template->Set(v8::String::New("fooMethod"), v8::FunctionTemplate::New(
&TestApiCallbacks::Callback, data, signature, 0));
v8::Local<v8::Function> func = func_template->GetFunction();
v8::Local<v8::Object> instance = func->NewInstance();
env->Global()->Set(v8::String::New("instance"), instance);
v8::Script::Compile(v8::String::New(native_method_test_source))->Run();
v8::Local<v8::Function> function = v8::Local<v8::Function>::Cast(
env->Global()->Get(v8::String::New("start")));
{
// Make sure method ICs are in monomorphic state before starting
// profiling.
callbacks.set_warming_up(true);
int32_t warm_up_iterations = 3;
v8::Handle<v8::Value> args[] = { v8::Integer::New(warm_up_iterations) };
function->Call(env->Global(), ARRAY_SIZE(args), args);
callbacks.set_warming_up(false);
}
int32_t repeat_count = 100;
v8::Handle<v8::Value> args[] = { v8::Integer::New(repeat_count) };
const v8::CpuProfile* profile =
RunProfiler(env, function, args, ARRAY_SIZE(args), 100);
const v8::CpuProfileNode* root = profile->GetTopDownRoot();
GetChild(root, "start");
const v8::CpuProfileNode* startNode = GetChild(root, "start");
GetChild(startNode, "fooMethod");
v8::CpuProfiler* cpu_profiler = env->GetIsolate()->GetCpuProfiler();
cpu_profiler->DeleteAllCpuProfiles();
}
static const char* bound_function_test_source = "function foo(iterations) {\n"
" var r = 0;\n"
" for (var i = 0; i < iterations; i++) { r += i; }\n"
" return r;\n"
"}\n"
"function start(duration) {\n"
" var callback = foo.bind(this);\n"
" var start = Date.now();\n"
" while (Date.now() - start < duration) {\n"
" callback(10 * 1000);\n"
" }\n"
"}";
TEST(BoundFunctionCall) {
LocalContext env;
v8::HandleScope scope(env->GetIsolate());
v8::Script::Compile(v8::String::New(bound_function_test_source))->Run();
v8::Local<v8::Function> function = v8::Local<v8::Function>::Cast(
env->Global()->Get(v8::String::New("start")));
int32_t duration_ms = 100;
v8::Handle<v8::Value> args[] = { v8::Integer::New(duration_ms) };
const v8::CpuProfile* profile =
RunProfiler(env, function, args, ARRAY_SIZE(args), 100);
const v8::CpuProfileNode* root = profile->GetTopDownRoot();
ScopedVector<v8::Handle<v8::String> > names(3);
names[0] = v8::String::New(ProfileGenerator::kGarbageCollectorEntryName);
names[1] = v8::String::New(ProfileGenerator::kProgramEntryName);
names[2] = v8::String::New("start");
// Don't allow |foo| node to be at the top level.
CheckChildrenNames(root, names);
const v8::CpuProfileNode* startNode = GetChild(root, "start");
GetChild(startNode, "foo");
v8::CpuProfiler* cpu_profiler = env->GetIsolate()->GetCpuProfiler();
cpu_profiler->DeleteAllCpuProfiles();
}
static const char* call_function_test_source = "function bar(iterations) {\n"
"}\n"
"function start(duration) {\n"
" var start = Date.now();\n"
" while (Date.now() - start < duration) {\n"
" try {\n"
" bar.call(this, 10 * 1000);\n"
" } catch(e) {}\n"
" }\n"
"}";
// Test that if we sampled thread when it was inside FunctionCall buitin then
// its caller frame will be '(unresolved function)' as we have no reliable way
// to resolve it.
//
// [Top down]:
// 96 0 (root) [-1] #1
// 1 1 (garbage collector) [-1] #4
// 5 0 (unresolved function) [-1] #5
// 5 5 call [-1] #6
// 71 70 start [-1] #3
// 1 1 bar [-1] #7
// 19 19 (program) [-1] #2
TEST(FunctionCallSample) {
LocalContext env;
v8::HandleScope scope(env->GetIsolate());
// Collect garbage that might have be generated while installing extensions.
HEAP->CollectAllGarbage(Heap::kNoGCFlags);
v8::Script::Compile(v8::String::New(call_function_test_source))->Run();
v8::Local<v8::Function> function = v8::Local<v8::Function>::Cast(
env->Global()->Get(v8::String::New("start")));
int32_t duration_ms = 100;
v8::Handle<v8::Value> args[] = { v8::Integer::New(duration_ms) };
const v8::CpuProfile* profile =
RunProfiler(env, function, args, ARRAY_SIZE(args), 100);
const v8::CpuProfileNode* root = profile->GetTopDownRoot();
{
ScopedVector<v8::Handle<v8::String> > names(4);
names[0] = v8::String::New(ProfileGenerator::kGarbageCollectorEntryName);
names[1] = v8::String::New(ProfileGenerator::kProgramEntryName);
names[2] = v8::String::New("start");
names[3] = v8::String::New(i::ProfileGenerator::kUnresolvedFunctionName);
// Don't allow |bar| and |call| nodes to be at the top level.
CheckChildrenNames(root, names);
}
// In case of GC stress tests all samples may be in GC phase and there
// won't be |start| node in the profiles.
bool is_gc_stress_testing =
(i::FLAG_gc_interval != -1) || i::FLAG_stress_compaction;
const v8::CpuProfileNode* startNode = FindChild(root, "start");
CHECK(is_gc_stress_testing || startNode);
if (startNode) {
ScopedVector<v8::Handle<v8::String> > names(2);
names[0] = v8::String::New("bar");
names[1] = v8::String::New("call");
CheckChildrenNames(startNode, names);
}
const v8::CpuProfileNode* unresolvedNode =
FindChild(root, i::ProfileGenerator::kUnresolvedFunctionName);
if (unresolvedNode) {
ScopedVector<v8::Handle<v8::String> > names(1);
names[0] = v8::String::New("call");
CheckChildrenNames(unresolvedNode, names);
}
v8::CpuProfiler* cpu_profiler = env->GetIsolate()->GetCpuProfiler();
cpu_profiler->DeleteAllCpuProfiles();
}
static const char* function_apply_test_source = "function bar(iterations) {\n"
"}\n"
"function test() {\n"
" bar.apply(this, [10 * 1000]);\n"
"}\n"
"function start(duration) {\n"
" var start = Date.now();\n"
" while (Date.now() - start < duration) {\n"
" try {\n"
" test();\n"
" } catch(e) {}\n"
" }\n"
"}";
// [Top down]:
// 94 0 (root) [-1] #0 1
// 2 2 (garbage collector) [-1] #0 7
// 82 49 start [-1] #16 3
// 1 0 (unresolved function) [-1] #0 8
// 1 1 apply [-1] #0 9
// 32 21 test [-1] #16 4
// 2 2 bar [-1] #16 6
// 9 9 apply [-1] #0 5
// 10 10 (program) [-1] #0 2
TEST(FunctionApplySample) {
LocalContext env;
v8::HandleScope scope(env->GetIsolate());
v8::Script::Compile(v8::String::New(function_apply_test_source))->Run();
v8::Local<v8::Function> function = v8::Local<v8::Function>::Cast(
env->Global()->Get(v8::String::New("start")));
int32_t duration_ms = 100;
v8::Handle<v8::Value> args[] = { v8::Integer::New(duration_ms) };
const v8::CpuProfile* profile =
RunProfiler(env, function, args, ARRAY_SIZE(args), 100);
const v8::CpuProfileNode* root = profile->GetTopDownRoot();
{
ScopedVector<v8::Handle<v8::String> > names(3);
names[0] = v8::String::New(ProfileGenerator::kGarbageCollectorEntryName);
names[1] = v8::String::New(ProfileGenerator::kProgramEntryName);
names[2] = v8::String::New("start");
// Don't allow |test|, |bar| and |apply| nodes to be at the top level.
CheckChildrenNames(root, names);
}
const v8::CpuProfileNode* startNode = FindChild(root, "start");
if (startNode) {
{
ScopedVector<v8::Handle<v8::String> > names(2);
names[0] = v8::String::New("test");
names[1] = v8::String::New(ProfileGenerator::kUnresolvedFunctionName);
CheckChildrenNames(startNode, names);
}
const v8::CpuProfileNode* testNode = FindChild(startNode, "test");
if (testNode) {
ScopedVector<v8::Handle<v8::String> > names(2);
names[0] = v8::String::New("bar");
names[1] = v8::String::New("apply");
CheckChildrenNames(testNode, names);
}
if (const v8::CpuProfileNode* unresolvedNode =
FindChild(startNode, ProfileGenerator::kUnresolvedFunctionName)) {
ScopedVector<v8::Handle<v8::String> > names(1);
names[0] = v8::String::New("apply");
CheckChildrenNames(unresolvedNode, names);
GetChild(unresolvedNode, "apply");
}
}
v8::CpuProfiler* cpu_profiler = env->GetIsolate()->GetCpuProfiler();
cpu_profiler->DeleteAllCpuProfiles();
}
static const char* js_native_js_test_source = "function foo(iterations) {\n"
" var r = 0;\n"
" for (var i = 0; i < iterations; i++) { r += i; }\n"
" return r;\n"
"}\n"
"function bar(iterations) {\n"
" try { foo(iterations); } catch(e) {}\n"
"}\n"
"function start(duration) {\n"
" var start = Date.now();\n"
" while (Date.now() - start < duration) {\n"
" try {\n"
" CallJsFunction(bar, 10 * 1000);\n"
" } catch(e) {}\n"
" }\n"
"}";
static void CallJsFunction(const v8::FunctionCallbackInfo<v8::Value>& info) {
v8::Handle<v8::Function> function = info[0].As<v8::Function>();
v8::Handle<v8::Value> argv[] = { info[1] };
function->Call(info.This(), ARRAY_SIZE(argv), argv);
}
// [Top down]:
// 58 0 (root) #0 1
// 2 2 (program) #0 2
// 56 1 start #16 3
// 55 0 CallJsFunction #0 4
// 55 1 bar #16 5
// 54 54 foo #16 6
TEST(JsNativeJsSample) {
LocalContext env;
v8::HandleScope scope(env->GetIsolate());
v8::Local<v8::FunctionTemplate> func_template = v8::FunctionTemplate::New(
CallJsFunction);
v8::Local<v8::Function> func = func_template->GetFunction();
func->SetName(v8::String::New("CallJsFunction"));
env->Global()->Set(v8::String::New("CallJsFunction"), func);
v8::Script::Compile(v8::String::New(js_native_js_test_source))->Run();
v8::Local<v8::Function> function = v8::Local<v8::Function>::Cast(
env->Global()->Get(v8::String::New("start")));
int32_t duration_ms = 20;
v8::Handle<v8::Value> args[] = { v8::Integer::New(duration_ms) };
const v8::CpuProfile* profile =
RunProfiler(env, function, args, ARRAY_SIZE(args), 50);
const v8::CpuProfileNode* root = profile->GetTopDownRoot();
{
ScopedVector<v8::Handle<v8::String> > names(3);
names[0] = v8::String::New(ProfileGenerator::kGarbageCollectorEntryName);
names[1] = v8::String::New(ProfileGenerator::kProgramEntryName);
names[2] = v8::String::New("start");
CheckChildrenNames(root, names);
}
const v8::CpuProfileNode* startNode = GetChild(root, "start");
CHECK_EQ(1, startNode->GetChildrenCount());
const v8::CpuProfileNode* nativeFunctionNode =
GetChild(startNode, "CallJsFunction");
CHECK_EQ(1, nativeFunctionNode->GetChildrenCount());
const v8::CpuProfileNode* barNode = GetChild(nativeFunctionNode, "bar");
CHECK_EQ(1, barNode->GetChildrenCount());
GetChild(barNode, "foo");
v8::CpuProfiler* cpu_profiler = env->GetIsolate()->GetCpuProfiler();
cpu_profiler->DeleteAllCpuProfiles();
}
static const char* js_native_js_runtime_js_test_source =
"function foo(iterations) {\n"
" var r = 0;\n"
" for (var i = 0; i < iterations; i++) { r += i; }\n"
" return r;\n"
"}\n"
"var bound = foo.bind(this);\n"
"function bar(iterations) {\n"
" try { bound(iterations); } catch(e) {}\n"
"}\n"
"function start(duration) {\n"
" var start = Date.now();\n"
" while (Date.now() - start < duration) {\n"
" try {\n"
" CallJsFunction(bar, 10 * 1000);\n"
" } catch(e) {}\n"
" }\n"
"}";
// [Top down]:
// 57 0 (root) #0 1
// 55 1 start #16 3
// 54 0 CallJsFunction #0 4
// 54 3 bar #16 5
// 51 51 foo #16 6
// 2 2 (program) #0 2
TEST(JsNativeJsRuntimeJsSample) {
LocalContext env;
v8::HandleScope scope(env->GetIsolate());
v8::Local<v8::FunctionTemplate> func_template = v8::FunctionTemplate::New(
CallJsFunction);
v8::Local<v8::Function> func = func_template->GetFunction();
func->SetName(v8::String::New("CallJsFunction"));
env->Global()->Set(v8::String::New("CallJsFunction"), func);
v8::Script::Compile(v8::String::New(js_native_js_runtime_js_test_source))->
Run();
v8::Local<v8::Function> function = v8::Local<v8::Function>::Cast(
env->Global()->Get(v8::String::New("start")));
int32_t duration_ms = 20;
v8::Handle<v8::Value> args[] = { v8::Integer::New(duration_ms) };
const v8::CpuProfile* profile =
RunProfiler(env, function, args, ARRAY_SIZE(args), 50);
const v8::CpuProfileNode* root = profile->GetTopDownRoot();
ScopedVector<v8::Handle<v8::String> > names(3);
names[0] = v8::String::New(ProfileGenerator::kGarbageCollectorEntryName);
names[1] = v8::String::New(ProfileGenerator::kProgramEntryName);
names[2] = v8::String::New("start");
CheckChildrenNames(root, names);
const v8::CpuProfileNode* startNode = GetChild(root, "start");
CHECK_EQ(1, startNode->GetChildrenCount());
const v8::CpuProfileNode* nativeFunctionNode =
GetChild(startNode, "CallJsFunction");
CHECK_EQ(1, nativeFunctionNode->GetChildrenCount());
const v8::CpuProfileNode* barNode = GetChild(nativeFunctionNode, "bar");
CHECK_EQ(1, barNode->GetChildrenCount());
GetChild(barNode, "foo");
v8::CpuProfiler* cpu_profiler = env->GetIsolate()->GetCpuProfiler();
cpu_profiler->DeleteAllCpuProfiles();
}
static void CallJsFunction2(const v8::FunctionCallbackInfo<v8::Value>& info) {
CallJsFunction(info);
}
static const char* js_native1_js_native2_js_test_source =
"function foo(iterations) {\n"
" var r = 0;\n"
" for (var i = 0; i < iterations; i++) { r += i; }\n"
" return r;\n"
"}\n"
"function bar(iterations) {\n"
" CallJsFunction2(foo, iterations);\n"
"}\n"
"function start(duration) {\n"
" var start = Date.now();\n"
" while (Date.now() - start < duration) {\n"
" try {\n"
" CallJsFunction1(bar, 10 * 1000);\n"
" } catch(e) {}\n"
" }\n"
"}";
// [Top down]:
// 57 0 (root) #0 1
// 55 1 start #16 3
// 54 0 CallJsFunction1 #0 4
// 54 0 bar #16 5
// 54 0 CallJsFunction2 #0 6
// 54 54 foo #16 7
// 2 2 (program) #0 2
TEST(JsNative1JsNative2JsSample) {
LocalContext env;
v8::HandleScope scope(env->GetIsolate());
v8::Local<v8::FunctionTemplate> func_template = v8::FunctionTemplate::New(
CallJsFunction);
v8::Local<v8::Function> func1 = func_template->GetFunction();
func1->SetName(v8::String::New("CallJsFunction1"));
env->Global()->Set(v8::String::New("CallJsFunction1"), func1);
v8::Local<v8::Function> func2 = v8::FunctionTemplate::New(
CallJsFunction2)->GetFunction();
func2->SetName(v8::String::New("CallJsFunction2"));
env->Global()->Set(v8::String::New("CallJsFunction2"), func2);
v8::Script::Compile(v8::String::New(js_native1_js_native2_js_test_source))->
Run();
v8::Local<v8::Function> function = v8::Local<v8::Function>::Cast(
env->Global()->Get(v8::String::New("start")));
int32_t duration_ms = 20;
v8::Handle<v8::Value> args[] = { v8::Integer::New(duration_ms) };
const v8::CpuProfile* profile =
RunProfiler(env, function, args, ARRAY_SIZE(args), 50);
const v8::CpuProfileNode* root = profile->GetTopDownRoot();
ScopedVector<v8::Handle<v8::String> > names(3);
names[0] = v8::String::New(ProfileGenerator::kGarbageCollectorEntryName);
names[1] = v8::String::New(ProfileGenerator::kProgramEntryName);
names[2] = v8::String::New("start");
CheckChildrenNames(root, names);
const v8::CpuProfileNode* startNode = GetChild(root, "start");
CHECK_EQ(1, startNode->GetChildrenCount());
const v8::CpuProfileNode* nativeNode1 =
GetChild(startNode, "CallJsFunction1");
CHECK_EQ(1, nativeNode1->GetChildrenCount());
const v8::CpuProfileNode* barNode = GetChild(nativeNode1, "bar");
CHECK_EQ(1, barNode->GetChildrenCount());
const v8::CpuProfileNode* nativeNode2 = GetChild(barNode, "CallJsFunction2");
CHECK_EQ(1, nativeNode2->GetChildrenCount());
GetChild(nativeNode2, "foo");
v8::CpuProfiler* cpu_profiler = env->GetIsolate()->GetCpuProfiler();
cpu_profiler->DeleteAllCpuProfiles();
}
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