Basic tag infrastructure

runtime/vm/isolate.h

 // 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.
 
 #ifndef VM_ISOLATE_H_
 #define VM_ISOLATE_H_
 
 #include "include/dart_api.h"
 #include "platform/assert.h"
 #include "platform/thread.h"
 #include "vm/base_isolate.h"
 #include "vm/class_table.h"
 #include "vm/handles.h"
 #include "vm/megamorphic_cache_table.h"
 #include "vm/random.h"
 #include "vm/store_buffer.h"
+#include "vm/tags.h"
 #include "vm/timer.h"
 
 namespace dart {
 
 // Forward declarations.
 class AbstractType;
 class ApiState;
 class Array;
 class Class;
 class CodeIndexTable;
@@ skipping 411 matching lines @@
 
   void set_thread_state(InterruptableThreadState* state) {
     ASSERT((thread_state_ == NULL) || (state == NULL));
     thread_state_ = state;
   }
 
   InterruptableThreadState* thread_state() const {
     return thread_state_;
   }
 
+  uword vm_tag() const {
+    return vm_tag_;
+  }
+  void set_vm_tag(uword tag) {
+    ASSERT(tag != VMTag::kInvalidTagId);
+    vm_tag_ = tag;
+  }
+
 #if defined(DEBUG)
 #define REUSABLE_HANDLE_SCOPE_ACCESSORS(object)                                \
   void set_reusable_##object##_handle_scope_active(bool value) {               \
     reusable_##object##_handle_scope_active_ = value;                          \
   }                                                                            \
   bool reusable_##object##_handle_scope_active() const {                       \
     return reusable_##object##_handle_scope_active_;                           \
   }
   REUSABLE_HANDLE_LIST(REUSABLE_HANDLE_SCOPE_ACCESSORS)
 #undef REUSABLE_HANDLE_SCOPE_ACCESSORS
@@ skipping 58 matching lines @@
   intptr_t stack_frame_index_;
 
   bool cha_used_;
 
   // Ring buffer of objects assigned an id.
   ObjectIdRing* object_id_ring_;
 
   IsolateProfilerData* profiler_data_;
   Mutex profiler_data_mutex_;
   InterruptableThreadState* thread_state_;
+  uword vm_tag_;

[siva, 2014/03/13 23:18:47]

you may have to put this and the accessor method above in BaseIsolate (see
comment in class VMTagScope)

 
   // Isolate list next pointer.
   Isolate* next_;
 
   // Reusable handles support.
 #define REUSABLE_HANDLE_FIELDS(object)                                         \
   object* object##_handle_;
   REUSABLE_HANDLE_LIST(REUSABLE_HANDLE_FIELDS)
 #undef REUSABLE_HANDLE_FIELDS
 
@@ skipping 122 matching lines @@
   char* script_url_;
   char* library_url_;
   char* class_name_;
   char* function_name_;
   char* exception_callback_name_;
 };
 
 }  // namespace dart
 
 #endif  // VM_ISOLATE_H_