Initial UserTag and dart:profiler library

runtime/vm/raw_object.h

 // Copyright (c) 2012, 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.
 
 #ifndef VM_RAW_OBJECT_H_
 #define VM_RAW_OBJECT_H_
 
 #include "platform/assert.h"
 #include "vm/globals.h"
 #include "vm/token.h"
@@ skipping 51 matching lines @@
     V(GrowableObjectArray)                                                     \
     V(TypedData)                                                               \
     V(ExternalTypedData)                                                       \
     V(Stacktrace)                                                              \
     V(JSRegExp)                                                                \
     V(WeakProperty)                                                            \
     V(MirrorReference)                                                         \
     V(Float32x4)                                                               \
     V(Int32x4)                                                                 \
     V(Float64x2)                                                               \
+    V(UserTag)                                                                 \
 
 #define CLASS_LIST_ARRAYS(V)                                                   \
   V(Array)                                                                     \
     V(ImmutableArray)                                                          \
 
 #define CLASS_LIST_STRINGS(V)                                                  \
   V(String)                                                                    \
     V(OneByteString)                                                           \
     V(TwoByteString)                                                           \
     V(ExternalOneByteString)                                                   \
@@ skipping 1492 matching lines @@
   RawObject** from() {
     return reinterpret_cast<RawObject**>(&ptr()->referent_);
   }
   RawObject* referent_;
   RawObject** to() {
     return reinterpret_cast<RawObject**>(&ptr()->referent_);
   }
 };
 
 
+// UserTag are used by the profiler to track Dart script state.
+class RawUserTag : public RawInstance {
+  RAW_HEAP_OBJECT_IMPLEMENTATION(UserTag);
+
+  RawObject** from() {
+    return reinterpret_cast<RawObject**>(&ptr()->label_);
+  }
+
+  RawString* label_;
+
+  RawObject** to() {
+    return reinterpret_cast<RawObject**>(&ptr()->label_);
+  }
+
+  // Isolate unique tag.
+  uword tag_;
+
+  friend class SnapshotReader;
+
+ public:
+  uword tag() const { return tag_; }
+};
+
 // Class Id predicates.
 
 inline bool RawObject::IsErrorClassId(intptr_t index) {
   // Make sure this function is updated when new Error types are added.
   ASSERT(kApiErrorCid == kErrorCid + 1 &&
          kLanguageErrorCid == kErrorCid + 2 &&
          kUnhandledExceptionCid == kErrorCid + 3 &&
          kUnwindErrorCid == kErrorCid + 4 &&
          kInstanceCid == kErrorCid + 5);
   return (index >= kErrorCid && index < kInstanceCid);
@@ skipping 187 matching lines @@
   // Make sure this is updated when new TypedData types are added.
   ASSERT(kTypedDataInt8ArrayViewCid == kTypedDataInt8ArrayCid + 14);
   ASSERT(kExternalTypedDataInt8ArrayCid == kTypedDataInt8ArrayViewCid + 15);
   ASSERT(kNullCid == kExternalTypedDataInt8ArrayCid + 14);
   return (kNullCid - kTypedDataInt8ArrayCid);
 }
 
 }  // namespace dart
 
 #endif  // VM_RAW_OBJECT_H_