Allow new CPU profiling subsystem to coexist nicely with the old one.

src/cpu-profiler-inl.h

 // 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
@@ skipping 21 matching lines @@
 
 #ifdef ENABLE_CPP_PROFILES_PROCESSOR
 
 #include "circular-queue-inl.h"
 #include "profile-generator-inl.h"
 
 namespace v8 {
 namespace internal {
 
 void CodeCreateEventRecord::UpdateCodeMap(CodeMap* code_map) {
-    code_map->AddCode(start, entry, size);
+  code_map->AddCode(start, entry, size);
 }
 
 
 void CodeMoveEventRecord::UpdateCodeMap(CodeMap* code_map) {
-    code_map->MoveCode(from, to);
+  code_map->MoveCode(from, to);
 }
 
 
 void CodeDeleteEventRecord::UpdateCodeMap(CodeMap* code_map) {
-    code_map->DeleteCode(start);
+  code_map->DeleteCode(start);
 }
 
 
 void CodeAliasEventRecord::UpdateCodeMap(CodeMap* code_map) {
-    code_map->AddAlias(alias, start);
+  code_map->AddAlias(alias, start);
+}
+
+
+TickSampleEventRecord* TickSampleEventRecord::init(void* value) {
+  TickSampleEventRecord* result =
+      reinterpret_cast<TickSampleEventRecord*>(value);
+  result->filler = 1;  // != SamplingCircularQueue::kClear.

[Søren Thygesen Gjesse, 2010/04/12 06:56:28]

Please add 

ASSERT(result->filler = != SamplingCircularQueue::kClear);

[mnaganov (inactive), 2010/04/12 07:17:45]

Done.

+  // Init the required fields only.
+  result->sample.pc = NULL;
+  result->sample.frames_count = 0;
+  return result;
 }
 
 
 TickSample* ProfilerEventsProcessor::TickSampleEvent() {
   TickSampleEventRecord* evt =
-      TickSampleEventRecord::cast(ticks_buffer_.Enqueue());
+      TickSampleEventRecord::init(ticks_buffer_.Enqueue());
   evt->order = enqueue_order_;  // No increment!
   return &evt->sample;
 }
 
 
 bool ProfilerEventsProcessor::FilterOutCodeCreateEvent(
     Logger::LogEventsAndTags tag) {
   // In browser mode, leave only callbacks and non-native JS entries.
   // We filter out regular expressions as currently we can't tell
   // whether they origin from native scripts, so let's not confise people by
   // showing them weird regexes they didn't wrote.
   return FLAG_prof_browser_mode
       && (tag != Logger::CALLBACK_TAG
           && tag != Logger::FUNCTION_TAG
           && tag != Logger::LAZY_COMPILE_TAG
           && tag != Logger::SCRIPT_TAG);
 }
 
 } }  // namespace v8::internal
 
 #endif  // ENABLE_CPP_PROFILES_PROCESSOR
 
 #endif  // V8_CPU_PROFILER_INL_H_