Add runtime and native entry tags

runtime/include/dart_api.h

Index: runtime/include/dart_api.h
diff --git a/runtime/include/dart_api.h b/runtime/include/dart_api.h
index 9046ec822d57c4afd0c322fc590eced00dbd35db..e007bccc0cae57b644dfbb01d03f218c3e50304c 100755
--- a/runtime/include/dart_api.h
+++ b/runtime/include/dart_api.h
@@ -2212,6 +2212,24 @@ typedef Dart_NativeFunction (*Dart_NativeEntryResolver)(Dart_Handle name,
 /* TODO(turnidge): Consider renaming to NativeFunctionResolver or
  * NativeResolver. */
 
+/**
+ * Native entry reverse resolution callback.

[siva, 2014/04/08 16:27:54]

Native entry symbol lookup callback.

[Cutch, 2014/04/09 17:40:59]

Done.

+ *
+ * For libraries and scripts which have native functions, the embedder
+ * can provide a native entry reverse resolver. This callback is used to map

[siva, 2014/04/08 16:27:54]

can provide a callback for mapping a native entry to a symbol. This callback
maps

[Cutch, 2014/04/09 17:40:59]

Done.

+ * a native function entry PC to the native function name. If no native entry
+ * can be found, the callback should return NULL.
+ *
+ * The parameters to the native reverse resolver function are:
+ * \param nf A Dart_NativeFunction.
+ *
+ * \return A const C string containing the name of the native function or NULL.
+ *
+ * See Dart_SetNativeResolver.
+ */
+typedef const char* (*Dart_NativeEntryReverseResolver)(Dart_NativeFunction nf);

[siva, 2014/04/08 16:27:54]

Should the return value be a const char* or a uint8_t* where the symbol is
returned in UTF8 format?

[Cutch, 2014/04/09 17:40:59]

UTF8.

+
+
 /*
  * ===========
  * Environment
@@ -2248,7 +2266,8 @@ DART_EXPORT Dart_Handle Dart_SetEnvironmentCallback(
  */
 DART_EXPORT Dart_Handle Dart_SetNativeResolver(
     Dart_Handle library,
-    Dart_NativeEntryResolver resolver);
+    Dart_NativeEntryResolver resolver,
+    Dart_NativeEntryReverseResolver reverse_resolver);

[siva, 2014/04/08 16:27:54]

Dart_NativeEntrySymbol

[Cutch, 2014/04/09 17:40:59]

Done.

 /* TODO(turnidge): Rename to Dart_LibrarySetNativeResolver? */