Initial UserTag and dart:profiler library

runtime/vm/object_store.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/object_store.h"
 
 #include "vm/exceptions.h"
 #include "vm/dart_entry.h"
 #include "vm/isolate.h"
 #include "vm/object.h"
@@ skipping 35 matching lines @@
     growable_object_array_class_(Class::null()),
     float32x4_class_(Class::null()),
     int32x4_class_(Class::null()),
     float64x2_class_(Class::null()),
     typed_data_classes_(Array::null()),
     error_class_(Class::null()),
     stacktrace_class_(Class::null()),
     jsregexp_class_(Class::null()),
     weak_property_class_(Class::null()),
     mirror_reference_class_(Class::null()),
+    user_tag_class_(Class::null()),
+    tag_table_(GrowableObjectArray::null()),
+    current_tag_(UserTag::null()),
     symbol_table_(Array::null()),
     canonical_type_arguments_(Array::null()),
     async_library_(Library::null()),
     builtin_library_(Library::null()),
     core_library_(Library::null()),
     isolate_library_(Library::null()),
     math_library_(Library::null()),
     mirrors_library_(Library::null()),
     native_wrappers_library_(Library::null()),
     root_library_(Library::null()),
@@ skipping 50 matching lines @@
 
   result = DartLibraryCalls::InstanceCreate(library,
                                             Symbols::StackOverflowError(),
                                             Symbols::Dot(),
                                             Object::empty_array());
   if (result.IsError()) {
     return false;
   }
   set_stack_overflow(Instance::Cast(result));
 
+  ASSERT(this->tag_table() == GrowableObjectArray::null());
+  this->tag_table_ = GrowableObjectArray::New();
+
   result = DartLibraryCalls::InstanceCreate(library,
                                             Symbols::OutOfMemoryError(),
                                             Symbols::Dot(),
                                             Object::empty_array());
   if (result.IsError()) {
     return false;
   }
   set_out_of_memory(Instance::Cast(result));
   const Array& code_array = Array::Handle(
       isolate,
       Array::New(Stacktrace::kPreallocatedStackdepth, Heap::kOld));
   const Array& pc_offset_array = Array::Handle(
       isolate,
       Array::New(Stacktrace::kPreallocatedStackdepth, Heap::kOld));
   const Stacktrace& stack_trace =
       Stacktrace::Handle(Stacktrace::New(code_array, pc_offset_array));
   // Expansion of inlined functions requires additional memory at run time,
   // avoid it.
   stack_trace.set_expand_inlined(false);
   set_preallocated_stack_trace(stack_trace);
 
   return true;
 }
 
 }  // namespace dart