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v8/test/cctest/test-cpu-profiler.cc
yurys@chromium.org 77d93014ae Un-flake test-cpu-profiler/SampleWhenFrameIsNotSetup 
It is OK for FindChild to return NULL. If the child must
exist GetChild should be used to force the assertion.

BUG=v8:2628
R=svenpanne@chromium.org

Review URL: https://codereview.chromium.org/15786004

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@14809 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
2013-05-24 16:19:06 +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.
// TODO(dcarney): remove
#define V8_ALLOW_ACCESS_TO_PERSISTENT_ARROW
#define V8_ALLOW_ACCESS_TO_PERSISTENT_IMPLICIT
#include "v8.h"
#include "cpu-profiler-inl.h"
#include "cctest.h"
#include "utils.h"
#include "../include/v8-profiler.h"
using i::CodeEntry;
using i::CpuProfile;
using i::CpuProfiler;
using i::CpuProfilesCollection;
using i::ProfileGenerator;
using i::ProfileNode;
using i::ProfilerEventsProcessor;
using i::ScopedVector;
using i::TokenEnumerator;
using i::Vector;
TEST(StartStop) {
CpuProfilesCollection profiles;
ProfileGenerator generator(&profiles);
ProfilerEventsProcessor processor(&generator, &profiles);
processor.Start();
processor.Stop();
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
TEST(CodeEvents) {
CcTest::InitializeVM();
i::Isolate* isolate = i::Isolate::Current();
i::Heap* heap = isolate->heap();
i::Factory* factory = isolate->factory();
TestSetup test_setup;
CpuProfilesCollection profiles;
profiles.StartProfiling("", 1, false);
ProfileGenerator generator(&profiles);
ProfilerEventsProcessor processor(&generator, &profiles);
processor.Start();
// Enqueue code creation events.
i::HandleScope scope(isolate);
const char* aaa_str = "aaa";
i::Handle<i::String> aaa_name = factory->NewStringFromAscii(
i::Vector<const char>(aaa_str, i::StrLength(aaa_str)));
processor.CodeCreateEvent(i::Logger::FUNCTION_TAG,
*aaa_name,
heap->empty_string(),
0,
ToAddress(0x1000),
0x100,
ToAddress(0x10000),
NULL);
processor.CodeCreateEvent(i::Logger::BUILTIN_TAG,
"bbb",
ToAddress(0x1200),
0x80);
processor.CodeCreateEvent(i::Logger::STUB_TAG, 5, ToAddress(0x1300), 0x10);
processor.CodeCreateEvent(i::Logger::BUILTIN_TAG,
"ddd",
ToAddress(0x1400),
0x80);
processor.CodeMoveEvent(ToAddress(0x1400), ToAddress(0x1500));
processor.CodeCreateEvent(i::Logger::STUB_TAG, 3, ToAddress(0x1600), 0x10);
processor.CodeCreateEvent(i::Logger::STUB_TAG, 4, ToAddress(0x1605), 0x10);
// Enqueue a tick event to enable code events processing.
EnqueueTickSampleEvent(&processor, ToAddress(0x1000));
processor.Stop();
processor.Join();
// Check the state of profile generator.
CodeEntry* entry1 = generator.code_map()->FindEntry(ToAddress(0x1000));
CHECK_NE(NULL, entry1);
CHECK_EQ(aaa_str, entry1->name());
CodeEntry* entry2 = generator.code_map()->FindEntry(ToAddress(0x1200));
CHECK_NE(NULL, entry2);
CHECK_EQ("bbb", entry2->name());
CodeEntry* entry3 = generator.code_map()->FindEntry(ToAddress(0x1300));
CHECK_NE(NULL, entry3);
CHECK_EQ("5", entry3->name());
CHECK_EQ(NULL, generator.code_map()->FindEntry(ToAddress(0x1400)));
CodeEntry* entry4 = generator.code_map()->FindEntry(ToAddress(0x1500));
CHECK_NE(NULL, entry4);
CHECK_EQ("ddd", entry4->name());
CHECK_EQ(NULL, generator.code_map()->FindEntry(ToAddress(0x1600)));
}
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;
CpuProfilesCollection profiles;
profiles.StartProfiling("", 1, false);
ProfileGenerator generator(&profiles);
ProfilerEventsProcessor processor(&generator, &profiles);
processor.Start();
processor.CodeCreateEvent(i::Logger::BUILTIN_TAG,
"bbb",
ToAddress(0x1200),
0x80);
processor.CodeCreateEvent(i::Logger::STUB_TAG, 5, ToAddress(0x1300), 0x10);
processor.CodeCreateEvent(i::Logger::BUILTIN_TAG,
"ddd",
ToAddress(0x1400),
0x80);
EnqueueTickSampleEvent(&processor, ToAddress(0x1210));
EnqueueTickSampleEvent(&processor, ToAddress(0x1305), ToAddress(0x1220));
EnqueueTickSampleEvent(&processor,
ToAddress(0x1404),
ToAddress(0x1305),
ToAddress(0x1230));
processor.Stop();
processor.Join();
CpuProfile* profile =
profiles.StopProfiling(TokenEnumerator::kNoSecurityToken, "", 1);
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;
CpuProfilesCollection profiles;
profiles.StartProfiling("", 1, false);
ProfileGenerator generator(&profiles);
ProfilerEventsProcessor processor(&generator, &profiles);
processor.Start();
processor.CodeCreateEvent(i::Logger::BUILTIN_TAG,
"bbb",
ToAddress(0x1200),
0x80);
i::TickSample* sample = processor.TickSampleEvent();
sample->pc = ToAddress(0x1200);
sample->tos = 0;
sample->frames_count = i::TickSample::kMaxFramesCount;
for (int i = 0; i < sample->frames_count; ++i) {
sample->stack[i] = ToAddress(0x1200);
}
processor.Stop();
processor.Join();
CpuProfile* profile =
profiles.StopProfiling(TokenEnumerator::kNoSecurityToken, "", 1);
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());
}
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, cpu_profiler->FindCpuProfile(uid1));
const_cast<v8::CpuProfile*>(p1)->Delete();
CHECK_EQ(0, cpu_profiler->GetProfileCount());
CHECK_EQ(NULL, cpu_profiler->FindCpuProfile(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, cpu_profiler->FindCpuProfile(uid2));
CHECK_EQ(NULL, cpu_profiler->FindCpuProfile(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, cpu_profiler->FindCpuProfile(uid3));
CHECK_EQ(NULL, cpu_profiler->FindCpuProfile(uid1));
const_cast<v8::CpuProfile*>(p2)->Delete();
CHECK_EQ(1, cpu_profiler->GetProfileCount());
CHECK_EQ(NULL, cpu_profiler->FindCpuProfile(uid2));
CHECK_EQ(p3, cpu_profiler->FindCpuProfile(uid3));
const_cast<v8::CpuProfile*>(p3)->Delete();
CHECK_EQ(0, cpu_profiler->GetProfileCount());
CHECK_EQ(NULL, cpu_profiler->FindCpuProfile(uid3));
CHECK_EQ(NULL, cpu_profiler->FindCpuProfile(uid2));
CHECK_EQ(NULL, cpu_profiler->FindCpuProfile(uid1));
}
TEST(DeleteCpuProfileDifferentTokens) {
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, cpu_profiler->FindCpuProfile(uid1));
v8::Local<v8::String> token1 = v8::String::New("token1");
const v8::CpuProfile* p1_t1 = cpu_profiler->FindCpuProfile(uid1, token1);
CHECK_NE(NULL, p1_t1);
CHECK_NE(p1, p1_t1);
CHECK_EQ(1, cpu_profiler->GetProfileCount());
const_cast<v8::CpuProfile*>(p1)->Delete();
CHECK_EQ(0, cpu_profiler->GetProfileCount());
CHECK_EQ(NULL, cpu_profiler->FindCpuProfile(uid1));
CHECK_EQ(NULL, cpu_profiler->FindCpuProfile(uid1, token1));
const_cast<v8::CpuProfile*>(p1_t1)->Delete();
CHECK_EQ(0, cpu_profiler->GetProfileCount());
v8::Local<v8::String> name2 = v8::String::New("2");
cpu_profiler->StartCpuProfiling(name2);
v8::Local<v8::String> token2 = v8::String::New("token2");
const v8::CpuProfile* p2_t2 = cpu_profiler->StopCpuProfiling(name2, token2);
CHECK_NE(NULL, p2_t2);
CHECK_EQ(1, cpu_profiler->GetProfileCount());
unsigned uid2 = p2_t2->GetUid();
CHECK_NE(static_cast<int>(uid1), static_cast<int>(uid2));
const v8::CpuProfile* p2 = cpu_profiler->FindCpuProfile(uid2);
CHECK_NE(p2_t2, p2);
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, cpu_profiler->FindCpuProfile(uid3));
const_cast<v8::CpuProfile*>(p2_t2)->Delete();
CHECK_EQ(1, cpu_profiler->GetProfileCount());
CHECK_EQ(NULL, cpu_profiler->FindCpuProfile(uid2));
CHECK_EQ(p3, cpu_profiler->FindCpuProfile(uid3));
const_cast<v8::CpuProfile*>(p2)->Delete();
CHECK_EQ(1, cpu_profiler->GetProfileCount());
CHECK_EQ(NULL, cpu_profiler->FindCpuProfile(uid2));
CHECK_EQ(p3, cpu_profiler->FindCpuProfile(uid3));
const_cast<v8::CpuProfile*>(p3)->Delete();
CHECK_EQ(0, cpu_profiler->GetProfileCount());
CHECK_EQ(NULL, cpu_profiler->FindCpuProfile(uid3));
}
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")));
v8::CpuProfiler* cpu_profiler = env->GetIsolate()->GetCpuProfiler();
v8::Local<v8::String> profile_name = v8::String::New("my_profile");
cpu_profiler->StartCpuProfiling(profile_name);
int32_t profiling_interval_ms = 200;
#if defined(_WIN32) || defined(_WIN64)
// 200ms is not enough on Windows. See
// https://code.google.com/p/v8/issues/detail?id=2628
profiling_interval_ms = 500;
#endif
v8::Handle<v8::Value> args[] = { v8::Integer::New(profiling_interval_ms) };
function->Call(env->Global(), ARRAY_SIZE(args), args);
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();
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));
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")));
v8::CpuProfiler* cpu_profiler = env->GetIsolate()->GetCpuProfiler();
v8::Local<v8::String> profile_name = v8::String::New("my_profile");
cpu_profiler->StartCpuProfiling(profile_name);
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) };
function->Call(env->Global(), ARRAY_SIZE(args), args);
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();
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");
}
}
cpu_profiler->DeleteAllCpuProfiles();
}
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