Add debugger functions to inspect objects and classes

runtime/include/dart_debugger_api.h

 // Copyright (c) 2011, 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 INCLUDE_DART_DEBUGGER_API_H_
 #define INCLUDE_DART_DEBUGGER_API_H_
 
 #include "include/dart_api.h"
 
 typedef struct _Dart_Breakpoint* Dart_Breakpoint;
@@ skipping 140 matching lines @@
  *
  * \return A handle to the True object if no error occurs.
  */
 DART_EXPORT Dart_Handle Dart_ActivationFrameInfo(
                             Dart_ActivationFrame activation_frame,
                             Dart_Handle* function_name,
                             Dart_Handle* script_url,
                             intptr_t* line_number);
 
 
+/**
+ * Returns the class object of the given \object.
+ *
+ * Requires there to be a current isolate.
+ *
+ * \return A handle to the class object.
+ */
+DART_EXPORT Dart_Handle Dart_GetObjClass(Dart_Handle object);
+
+
+/**
+ * Returns the superclass of the given class \cls.
+ *
+ * Requires there to be a current isolate.
+ *
+ * \return A handle to the class object.
+ */
+DART_EXPORT Dart_Handle Dart_GetSuperclass(Dart_Handle cls);

[siva, 2012/01/26 21:34:08]

Where do you intend to use these two class methods?

Is it to get a dump of the class definition?

[hausner, 2012/01/27 17:19:30]

I'm pretty sure a debugger would like to know what the class of an object is, so
it can annotate the variable or field with the type if it wants to. Walking the
superclass chain will be handy in the same way.

+
+
+/**
+ * Returns an array containing all instance field names and values of
+ * the given \object.
+ *
+ * Requires there to be a current isolate.
+ *
+ * \return A handle to an array containing field names and
+ * corresponding field values. The array is empty if the object has
+ * no fields. If non-empty, field names are at array offsets 2*n,
+ * values at offset 2*n+1.
+ */
+DART_EXPORT Dart_Handle Dart_GetInstanceFields(Dart_Handle object);
+
+
+/**
+ * Returns an array containing all static field names and values of
+ * the given class \cls.
+ *
+ * Requires there to be a current isolate.
+ *
+ * \return A handle to an array containing field names and
+ * corresponding field values. The array is empty if the class has
+ * no static fields. If non-empty, field names are at array offsets 2*n,
+ * values at offset 2*n+1.
+ */
+DART_EXPORT Dart_Handle Dart_GetStaticFields(Dart_Handle cls);
+
+
 #endif  // INCLUDE_DART_DEBUGGER_API_H_