Add timestamps to CPU profile samples.

src/profile-generator.cc

 // Copyright 2012 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
@@ skipping 341 matching lines @@
 }
 
 
 CpuProfile::CpuProfile(const char* title, bool record_samples)
     : title_(title),
       record_samples_(record_samples),
       start_time_(TimeTicks::HighResolutionNow()) {
 }
 
 
-void CpuProfile::AddPath(const Vector<CodeEntry*>& path) {
+void CpuProfile::AddPath(TimeTicks timestamp, const Vector<CodeEntry*>& path) {
   ProfileNode* top_frame_node = top_down_.AddPathFromEnd(path);
-  if (record_samples_) samples_.Add(top_frame_node);
+  if (record_samples_) {
+    timestamps_.Add(timestamp);
+    samples_.Add(top_frame_node);
+  }
 }
 
 
 void CpuProfile::CalculateTotalTicksAndSamplingRate() {
   end_time_ = TimeTicks::HighResolutionNow();
 }
 
 
 void CpuProfile::Print() {
   OS::Print("[Top down]:\n");
@@ skipping 163 matching lines @@
     if (profile == finished_profiles_[i]) {
       finished_profiles_.Remove(i);
       return;
     }
   }
   UNREACHABLE();
 }
 
 
 void CpuProfilesCollection::AddPathToCurrentProfiles(
-    const Vector<CodeEntry*>& path) {
+    TimeTicks timestamp, const Vector<CodeEntry*>& path) {
   // As starting / stopping profiles is rare relatively to this
   // method, we don't bother minimizing the duration of lock holding,
   // e.g. copying contents of the list to a local vector.
   current_profiles_semaphore_.Wait();
   for (int i = 0; i < current_profiles_.length(); ++i) {
-    current_profiles_[i]->AddPath(path);
+    current_profiles_[i]->AddPath(timestamp, path);
   }
   current_profiles_semaphore_.Signal();
 }
 
 
 CodeEntry* CpuProfilesCollection::NewCodeEntry(
       Logger::LogEventsAndTags tag,
       const char* name,
       const char* name_prefix,
       const char* resource_name,
@@ skipping 102 matching lines @@
         no_symbolized_entries = false;
         break;
       }
     }
     // If no frames were symbolized, put the VM state entry in.
     if (no_symbolized_entries) {
       *entry++ = EntryForVMState(sample.state);
     }
   }
 
-  profiles_->AddPathToCurrentProfiles(entries);
+  profiles_->AddPathToCurrentProfiles(sample.timestamp, entries);
 }
 
 
 CodeEntry* ProfileGenerator::EntryForVMState(StateTag tag) {
   switch (tag) {
     case GC:
       return gc_entry_;
     case JS:
     case COMPILER:
     // DOM events handlers are reported as OTHER / EXTERNAL entries.
     // To avoid confusing people, let's put all these entries into
     // one bucket.
     case OTHER:
     case EXTERNAL:
       return program_entry_;
     case IDLE:
       return idle_entry_;
     default: return NULL;
   }
 }
 
 } }  // namespace v8::internal