Allow recording individual samples in addition to the aggregated CPU profiles

src/profile-generator-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 56 matching lines @@
       || tag == Logger::NATIVE_LAZY_COMPILE_TAG
       || tag == Logger::NATIVE_SCRIPT_TAG;
 }
 
 
 ProfileNode::ProfileNode(ProfileTree* tree, CodeEntry* entry)
     : tree_(tree),
       entry_(entry),
       total_ticks_(0),
       self_ticks_(0),
-      children_(CodeEntriesMatch) {
+      children_(CodeEntriesMatch),
+      id_(tree->next_node_id()) {
 }
 
 
 CodeEntry* ProfileGenerator::EntryForVMState(StateTag tag) {
   switch (tag) {
     case GC:
       return gc_entry_;
     case JS:
     case COMPILER:
     case PARALLEL_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_;
     default: return NULL;
   }
 }
 
 } }  // namespace v8::internal
 
 #endif  // V8_PROFILE_GENERATOR_INL_H_