Refactor CpuProfiler.

src/profiler/profile-generator.cc

 // Copyright 2012 the V8 project authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "src/profiler/profile-generator.h"
 
 #include "src/ast/scopeinfo.h"
 #include "src/base/adapters.h"
 #include "src/debug/debug.h"
 #include "src/deoptimizer.h"
@@ skipping 30 matching lines @@
   }
   return it->second;
 }
 
 
 const char* const CodeEntry::kEmptyNamePrefix = "";
 const char* const CodeEntry::kEmptyResourceName = "";
 const char* const CodeEntry::kEmptyBailoutReason = "";
 const char* const CodeEntry::kNoDeoptReason = "";
 
+const char* const CodeEntry::kProgramEntryName = "(program)";
+const char* const CodeEntry::kIdleEntryName = "(idle)";
+const char* const CodeEntry::kGarbageCollectorEntryName = "(garbage collector)";
+const char* const CodeEntry::kUnresolvedFunctionName = "(unresolved function)";
+
+base::LazyDynamicInstance<CodeEntry, CodeEntry::ProgramEntryCreateTrait>::type
+    CodeEntry::kProgramEntry = LAZY_DYNAMIC_INSTANCE_INITIALIZER;
+
+base::LazyDynamicInstance<CodeEntry, CodeEntry::IdleEntryCreateTrait>::type
+    CodeEntry::kIdleEntry = LAZY_DYNAMIC_INSTANCE_INITIALIZER;
+
+base::LazyDynamicInstance<CodeEntry, CodeEntry::GCEntryCreateTrait>::type
+    CodeEntry::kGCEntry = LAZY_DYNAMIC_INSTANCE_INITIALIZER;
+
+base::LazyDynamicInstance<CodeEntry,
+                          CodeEntry::UnresolvedEntryCreateTrait>::type
+    CodeEntry::kUnresolvedEntry = LAZY_DYNAMIC_INSTANCE_INITIALIZER;
+
+CodeEntry* CodeEntry::ProgramEntryCreateTrait::Create() {
+  return new CodeEntry(Logger::FUNCTION_TAG, CodeEntry::kProgramEntryName);
+}
+
+CodeEntry* CodeEntry::IdleEntryCreateTrait::Create() {
+  return new CodeEntry(Logger::FUNCTION_TAG, CodeEntry::kIdleEntryName);
+}
+
+CodeEntry* CodeEntry::GCEntryCreateTrait::Create() {
+  return new CodeEntry(Logger::BUILTIN_TAG,
+                       CodeEntry::kGarbageCollectorEntryName);
+}
+
+CodeEntry* CodeEntry::UnresolvedEntryCreateTrait::Create() {
+  return new CodeEntry(Logger::FUNCTION_TAG,
+                       CodeEntry::kUnresolvedFunctionName);
+}
 
 CodeEntry::~CodeEntry() {
   delete line_info_;
   for (auto location : inline_locations_) {
     for (auto entry : location.second) {
       delete entry;
     }
   }
 }
 
@@ skipping 391 matching lines @@
   base::OS::Print("%p %5d %s\n", static_cast<void*>(key), value.size,
                   value.entry->name());
 }
 
 
 void CodeMap::Print() {
   CodeTreePrinter printer;
   tree_.ForEach(&printer);
 }
 
-
 CpuProfilesCollection::CpuProfilesCollection(Heap* heap)
-    : function_and_resource_names_(heap),
+    : resource_names_(heap),
       isolate_(heap->isolate()),
       current_profiles_semaphore_(1) {}
 
-
-static void DeleteCodeEntry(CodeEntry** entry_ptr) {
-  delete *entry_ptr;
-}
-
-
 static void DeleteCpuProfile(CpuProfile** profile_ptr) {
   delete *profile_ptr;
 }
 
 
 CpuProfilesCollection::~CpuProfilesCollection() {
   finished_profiles_.Iterate(DeleteCpuProfile);
   current_profiles_.Iterate(DeleteCpuProfile);
-  code_entries_.Iterate(DeleteCodeEntry);
 }
 
 
 bool CpuProfilesCollection::StartProfiling(const char* title,
                                            bool record_samples) {
   current_profiles_semaphore_.Wait();
   if (current_profiles_.length() >= kMaxSimultaneousProfiles) {
     current_profiles_semaphore_.Signal();
     return false;
   }
@@ skipping 56 matching lines @@
   // 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(timestamp, path, src_line, update_stats);
   }
   current_profiles_semaphore_.Signal();
 }
 
-
-CodeEntry* CpuProfilesCollection::NewCodeEntry(
-    Logger::LogEventsAndTags tag, const char* name, const char* name_prefix,
-    const char* resource_name, int line_number, int column_number,
-    JITLineInfoTable* line_info, Address instruction_start) {
-  CodeEntry* code_entry =
-      new CodeEntry(tag, name, name_prefix, resource_name, line_number,
-                    column_number, line_info, instruction_start);
-  code_entries_.Add(code_entry);
-  return code_entry;
-}
-
-
-const char* const ProfileGenerator::kProgramEntryName =
-    "(program)";
-const char* const ProfileGenerator::kIdleEntryName =
-    "(idle)";
-const char* const ProfileGenerator::kGarbageCollectorEntryName =
-    "(garbage collector)";
-const char* const ProfileGenerator::kUnresolvedFunctionName =
-    "(unresolved function)";
-
-
 ProfileGenerator::ProfileGenerator(CpuProfilesCollection* profiles)
-    : profiles_(profiles),
-      program_entry_(
-          profiles->NewCodeEntry(Logger::FUNCTION_TAG, kProgramEntryName)),
-      idle_entry_(
-          profiles->NewCodeEntry(Logger::FUNCTION_TAG, kIdleEntryName)),
-      gc_entry_(
-          profiles->NewCodeEntry(Logger::BUILTIN_TAG,
-                                 kGarbageCollectorEntryName)),
-      unresolved_entry_(
-          profiles->NewCodeEntry(Logger::FUNCTION_TAG,
-                                 kUnresolvedFunctionName)) {
-}
-
+    : profiles_(profiles) {}
 
 void ProfileGenerator::RecordTickSample(const TickSample& sample) {
   std::vector<CodeEntry*> entries;
   // Conservatively reserve space for stack frames + pc + function + vm-state.
   // There could in fact be more of them because of inlined entries.
   entries.reserve(sample.frames_count + 3);
 
   // The ProfileNode knows nothing about all versions of generated code for
   // the same JS function. The line number information associated with
   // the latest version of generated code is used to find a source line number
@@ skipping 32 matching lines @@
 
         if (pc_entry->builtin_id() == Builtins::kFunctionPrototypeApply ||
             pc_entry->builtin_id() == Builtins::kFunctionPrototypeCall) {
           // When current function is either the Function.prototype.apply or the
           // Function.prototype.call builtin the top frame is either frame of
           // the calling JS function or internal frame.
           // In the latter case we know the caller for sure but in the
           // former case we don't so we simply replace the frame with
           // 'unresolved' entry.
           if (!sample.has_external_callback) {
-            entries.push_back(unresolved_entry_);
+            entries.push_back(CodeEntry::unresolved_entry());
           }
         }
       }
     }
 
     for (const Address *stack_pos = sample.stack,
                        *stack_end = stack_pos + sample.frames_count;
          stack_pos != stack_end; ++stack_pos) {
       CodeEntry* entry = code_map_.FindEntry(*stack_pos);
 
@@ skipping 36 matching lines @@
   }
 
   profiles_->AddPathToCurrentProfiles(sample.timestamp, entries, src_line,
                                       sample.update_stats);
 }
 
 
 CodeEntry* ProfileGenerator::EntryForVMState(StateTag tag) {
   switch (tag) {
     case GC:
-      return gc_entry_;
+      return CodeEntry::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_;
+      return CodeEntry::program_entry();
     case IDLE:
-      return idle_entry_;
+      return CodeEntry::idle_entry();
     default: return NULL;
   }
 }
 
 }  // namespace internal
 }  // namespace v8