Add Function based profile tree

runtime/vm/dart.cc

 // Copyright (c) 2013, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 #include "vm/dart.h"
 
 #include "vm/code_observers.h"
 #include "vm/cpu.h"
 #include "vm/dart_api_state.h"
 #include "vm/dart_entry.h"
@@ skipping 23 matching lines @@
 
 DEFINE_FLAG(int, new_gen_semi_max_size, (kWordSize <= 4) ? 16 : 32,
             "Max size of new gen semi space in MB");
 DEFINE_FLAG(int, old_gen_heap_size, 0,
             "Max size of old gen heap size in MB, or 0 for unlimited,"
             "e.g: --old_gen_heap_size=1024 allows up to 1024MB old gen heap");
 DEFINE_FLAG(int, external_max_size, (kWordSize <= 4) ? 512 : 1024,
             "Max total size of external allocations in MB, or 0 for unlimited,"
             "e.g: --external_max_size=1024 allows up to 1024MB of externals");
 
+DEFINE_FLAG(bool, keep_code, false,
+            "Keep deoptimized code for profiling.");
 
 DECLARE_FLAG(bool, print_class_table);
 DECLARE_FLAG(bool, trace_isolates);
 
 Isolate* Dart::vm_isolate_ = NULL;
 ThreadPool* Dart::thread_pool_ = NULL;
 DebugInfo* Dart::pprof_symbol_generator_ = NULL;
 ReadOnlyHandles* Dart::predefined_handles_ = NULL;
 
 // Structure for managing read-only global handles allocation used for
@@ skipping 215 matching lines @@
   ServiceIsolate::SendIsolateStartupMessage();
   isolate->debugger()->NotifyIsolateCreated();
 
   // Create tag table.
   isolate->set_tag_table(
       GrowableObjectArray::Handle(GrowableObjectArray::New()));
   // Set up default UserTag.
   const UserTag& default_tag = UserTag::Handle(UserTag::DefaultTag());
   isolate->set_current_tag(default_tag);
 
+  if (FLAG_keep_code) {
+    isolate->set_deoptimized_code_array(
+      GrowableObjectArray::Handle(GrowableObjectArray::New()));
+  }
   return Error::null();
 }
 
 
 void Dart::RunShutdownCallback() {
   Isolate* isolate = Isolate::Current();
   void* callback_data = isolate->init_callback_data();
   Dart_IsolateShutdownCallback callback = Isolate::ShutdownCallback();
   ServiceIsolate::SendIsolateShutdownMessage();
   if (callback != NULL) {
@@ skipping 15 matching lines @@
   return predefined_handles_->handles_.AllocateScopedHandle();
 }
 
 
 bool Dart::IsReadOnlyHandle(uword address) {
   ASSERT(predefined_handles_ != NULL);
   return predefined_handles_->handles_.IsValidScopedHandle(address);
 }
 
 }  // namespace dart