Ben Murdoch | 61f157c | 2016-09-16 13:49:30 +0100 | [diff] [blame] | 1 | // Copyright 2016 the V8 project authors. All rights reserved. |
| 2 | // Use of this source code is governed by a BSD-style license that can be |
| 3 | // found in the LICENSE file. |
| 4 | // Tests of sampler functionalities. |
| 5 | |
| 6 | #include "src/libsampler/v8-sampler.h" |
| 7 | |
| 8 | #include "src/base/platform/platform.h" |
| 9 | #include "test/cctest/cctest.h" |
| 10 | |
| 11 | |
| 12 | namespace v8 { |
| 13 | namespace sampler { |
| 14 | |
| 15 | namespace { |
| 16 | |
| 17 | class TestSamplingThread : public base::Thread { |
| 18 | public: |
| 19 | static const int kSamplerThreadStackSize = 64 * 1024; |
| 20 | |
| 21 | explicit TestSamplingThread(Sampler* sampler) |
| 22 | : Thread(base::Thread::Options("TestSamplingThread", |
| 23 | kSamplerThreadStackSize)), |
| 24 | sampler_(sampler) {} |
| 25 | |
| 26 | // Implement Thread::Run(). |
| 27 | void Run() override { |
| 28 | while (sampler_->IsProfiling()) { |
| 29 | sampler_->DoSample(); |
| 30 | base::OS::Sleep(base::TimeDelta::FromMilliseconds(1)); |
| 31 | } |
| 32 | } |
| 33 | |
| 34 | private: |
| 35 | Sampler* sampler_; |
| 36 | }; |
| 37 | |
| 38 | |
| 39 | class TestSampler : public Sampler { |
| 40 | public: |
| 41 | explicit TestSampler(Isolate* isolate) : Sampler(isolate) {} |
| 42 | |
| 43 | void SampleStack(const v8::RegisterState& regs) override { |
| 44 | void* frames[Sampler::kMaxFramesCount]; |
| 45 | SampleInfo sample_info; |
| 46 | isolate()->GetStackSample(regs, reinterpret_cast<void**>(frames), |
| 47 | Sampler::kMaxFramesCount, &sample_info); |
| 48 | if (is_counting_samples_) { |
| 49 | if (sample_info.vm_state == JS) ++js_sample_count_; |
| 50 | if (sample_info.vm_state == EXTERNAL) ++external_sample_count_; |
| 51 | } |
| 52 | } |
| 53 | }; |
| 54 | |
| 55 | |
| 56 | class TestApiCallbacks { |
| 57 | public: |
| 58 | TestApiCallbacks() {} |
| 59 | |
| 60 | static void Getter(v8::Local<v8::String> name, |
| 61 | const v8::PropertyCallbackInfo<v8::Value>& info) { |
| 62 | } |
| 63 | |
| 64 | static void Setter(v8::Local<v8::String> name, |
| 65 | v8::Local<v8::Value> value, |
| 66 | const v8::PropertyCallbackInfo<void>& info) { |
| 67 | } |
| 68 | }; |
| 69 | |
| 70 | |
| 71 | static void RunSampler(v8::Local<v8::Context> env, |
| 72 | v8::Local<v8::Function> function, |
| 73 | v8::Local<v8::Value> argv[], int argc, |
| 74 | unsigned min_js_samples = 0, |
| 75 | unsigned min_external_samples = 0) { |
| 76 | Sampler::SetUp(); |
| 77 | TestSampler* sampler = new TestSampler(env->GetIsolate()); |
| 78 | TestSamplingThread* thread = new TestSamplingThread(sampler); |
| 79 | sampler->IncreaseProfilingDepth(); |
| 80 | sampler->Start(); |
| 81 | sampler->StartCountingSamples(); |
| 82 | thread->StartSynchronously(); |
| 83 | do { |
| 84 | function->Call(env, env->Global(), argc, argv).ToLocalChecked(); |
| 85 | } while (sampler->js_sample_count() < min_js_samples || |
| 86 | sampler->external_sample_count() < min_external_samples); |
| 87 | sampler->Stop(); |
| 88 | sampler->DecreaseProfilingDepth(); |
| 89 | thread->Join(); |
| 90 | delete thread; |
| 91 | delete sampler; |
| 92 | Sampler::TearDown(); |
| 93 | } |
| 94 | |
| 95 | } // namespace |
| 96 | |
| 97 | static const char* sampler_test_source = "function start(count) {\n" |
| 98 | " for (var i = 0; i < count; i++) {\n" |
| 99 | " var o = instance.foo;\n" |
| 100 | " instance.foo = o + 1;\n" |
| 101 | " }\n" |
| 102 | "}\n"; |
| 103 | |
| 104 | static v8::Local<v8::Function> GetFunction(v8::Local<v8::Context> env, |
| 105 | const char* name) { |
| 106 | return v8::Local<v8::Function>::Cast( |
| 107 | env->Global()->Get(env, v8_str(name)).ToLocalChecked()); |
| 108 | } |
| 109 | |
| 110 | |
| 111 | TEST(LibSamplerCollectSample) { |
| 112 | LocalContext env; |
| 113 | v8::Isolate* isolate = env->GetIsolate(); |
| 114 | v8::HandleScope scope(isolate); |
| 115 | |
| 116 | v8::Local<v8::FunctionTemplate> func_template = |
| 117 | v8::FunctionTemplate::New(isolate); |
| 118 | v8::Local<v8::ObjectTemplate> instance_template = |
| 119 | func_template->InstanceTemplate(); |
| 120 | |
| 121 | TestApiCallbacks accessors; |
| 122 | v8::Local<v8::External> data = |
| 123 | v8::External::New(isolate, &accessors); |
| 124 | instance_template->SetAccessor(v8_str("foo"), &TestApiCallbacks::Getter, |
| 125 | &TestApiCallbacks::Setter, data); |
| 126 | v8::Local<v8::Function> func = |
| 127 | func_template->GetFunction(env.local()).ToLocalChecked(); |
| 128 | v8::Local<v8::Object> instance = |
| 129 | func->NewInstance(env.local()).ToLocalChecked(); |
| 130 | env->Global()->Set(env.local(), v8_str("instance"), instance).FromJust(); |
| 131 | |
| 132 | CompileRun(sampler_test_source); |
| 133 | v8::Local<v8::Function> function = GetFunction(env.local(), "start"); |
| 134 | |
| 135 | int32_t repeat_count = 100; |
| 136 | v8::Local<v8::Value> args[] = {v8::Integer::New(isolate, repeat_count)}; |
| 137 | RunSampler(env.local(), function, args, arraysize(args), 100, 100); |
| 138 | } |
| 139 | |
| 140 | } // namespace sampler |
| 141 | } // namespace v8 |