From b90bd6987b78d5e0ff41c8d423d981e8b0ebf4d5 Mon Sep 17 00:00:00 2001
From: "yurys@chromium.org"
 <yurys@chromium.org@ce2b1a6d-e550-0410-aec6-3dcde31c8c00>
Date: Tue, 11 Jun 2013 08:32:48 +0000
Subject: [PATCH] Make sure CallIC is in monomorphic state when starting
 profiling in NativeAccessorNameInProfile2

Changed cctest/test-cpu-profiler/NativeAccessorNameInProfile2 to make a few warm-up cycles before starting profiler so that accessor invocations performed via monomorphic inline caches and slow paths traces do not distort the profile.

Drive-by: removed logging code that was used to diagnose NativeAccessorNameInProfile2 failures on Windows.

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

Review URL: https://codereview.chromium.org/16758007

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@15055 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
---
 test/cctest/test-cpu-profiler.cc | 39 +++++++++++++++++++--------------------
 1 file changed, 19 insertions(+), 20 deletions(-)

diff --git a/test/cctest/test-cpu-profiler.cc b/test/cctest/test-cpu-profiler.cc
index 188fbd9..a121799 100644
--- a/test/cctest/test-cpu-profiler.cc
+++ b/test/cctest/test-cpu-profiler.cc
@@ -652,15 +652,12 @@ class FooAccessorsData {
  public:
   explicit FooAccessorsData(int min_duration_ms)
       : min_duration_ms_(min_duration_ms),
-        getter_duration_(0),
-        setter_duration_(0),
-        getter_iterations_(0),
-        setter_iterations_(0) {}
+        is_warming_up_(false) {}
 
   static v8::Handle<v8::Value> Getter(v8::Local<v8::String> name,
                                       const v8::AccessorInfo& info) {
     FooAccessorsData* data = fromInfo(info);
-    data->getter_duration_ = data->Wait(&data->getter_iterations_);
+    data->Wait();
     return v8::Int32::New(2013);
   }
 
@@ -668,24 +665,20 @@ class FooAccessorsData {
                      v8::Local<v8::Value> value,
                      const v8::AccessorInfo& info) {
     FooAccessorsData* data = fromInfo(info);
-    data->setter_duration_ = data->Wait(&data->setter_iterations_);
+    data->Wait();
   }
 
-  void PrintAccessorTime() {
-    i::OS::Print("getter: %f ms (%d); setter: %f ms (%d)\n", getter_duration_,
-        getter_iterations_, setter_duration_, setter_iterations_);
-  }
+  void set_warming_up(bool value) { is_warming_up_ = value; }
 
  private:
-  double Wait(int* iterations) {
+  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;
-      ++*iterations;
     }
-    return duration;
   }
 
   static FooAccessorsData* fromInfo(const v8::AccessorInfo& info) {
@@ -694,10 +687,7 @@ class FooAccessorsData {
   }
 
   int min_duration_ms_;
-  double getter_duration_;
-  double setter_duration_;
-  int getter_iterations_;
-  int setter_iterations_;
+  bool is_warming_up_;
 };
 
 
@@ -705,7 +695,7 @@ class FooAccessorsData {
 // 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(NativeAccessorNameInProfile1) {
+TEST(NativeAccessorUninitializedIC) {
   LocalContext env;
   v8::HandleScope scope(env->GetIsolate());
 
@@ -740,7 +730,6 @@ TEST(NativeAccessorNameInProfile1) {
   // Dump collected profile to have a better diagnostic in case of failure.
   reinterpret_cast<i::CpuProfile*>(
       const_cast<v8::CpuProfile*>(profile))->Print();
-  accessors.PrintAccessorTime();
 
   const v8::CpuProfileNode* root = profile->GetTopDownRoot();
   const v8::CpuProfileNode* startNode = GetChild(root, "start");
@@ -754,7 +743,7 @@ TEST(NativeAccessorNameInProfile1) {
 // 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(NativeAccessorNameInProfile2) {
+TEST(NativeAccessorMonomorphicIC) {
   LocalContext env;
   v8::HandleScope scope(env->GetIsolate());
 
@@ -776,6 +765,16 @@ TEST(NativeAccessorNameInProfile2) {
   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);
+  }
+
   v8::CpuProfiler* cpu_profiler = env->GetIsolate()->GetCpuProfiler();
   v8::Local<v8::String> profile_name = v8::String::New("my_profile");
 
-- 
2.7.4