Allow setting break-on-exceptions option over the service protocol.

runtime/observatory/lib/src/service/object.dart

Index: runtime/observatory/lib/src/service/object.dart
diff --git a/runtime/observatory/lib/src/service/object.dart b/runtime/observatory/lib/src/service/object.dart
index 4c42991a45aa3a7d78642d0c6d252d7808af35a2..fa8026c4a2acceb88d5767580e9b112cb23ee54a 100644
--- a/runtime/observatory/lib/src/service/object.dart
+++ b/runtime/observatory/lib/src/service/object.dart
@@ -1170,6 +1170,7 @@ class Isolate extends ServiceObjectOwner with Coverage {
 
       case ServiceEvent.kIsolateUpdate:
       case ServiceEvent.kBreakpointResolved:
+      case ServiceEvent.kDebuggerUpdate:
         // Update occurs as side-effect of caching.
         break;
 
@@ -1265,6 +1266,14 @@ class Isolate extends ServiceObjectOwner with Coverage {
     return invokeRpc('setName', {'name': newName});
   }
 
+  Future getDebuggerUpdate() {
+    return invokeRpc('_getDebuggerUpdate', {});
+  }
+
+  Future setExceptionPauseInfo(String exceptions) {
+    return invokeRpc('_setExceptionPauseInfo', {'exceptions': exceptions});
+  }
+
   Future<ServiceMap> getStack() {
     return invokeRpc('getStack', {});
   }
@@ -1470,6 +1479,7 @@ class ServiceEvent extends ServiceObject {
   static const kGraph              = '_Graph';
   static const kGC                 = 'GC';
   static const kInspect            = 'Inspect';
+  static const kDebuggerUpdate     = '_DebuggerUpdate';
   static const kConnectionClosed   = 'ConnectionClosed';
 
   ServiceEvent._empty(ServiceObjectOwner owner) : super._empty(owner);
@@ -1481,11 +1491,12 @@ class ServiceEvent extends ServiceObject {
   @observable String kind;
   @observable Breakpoint breakpoint;
   @observable Frame topFrame;
-  @observable ServiceMap exception;
+  @observable Instance exception;
   @observable ServiceObject inspectee;
   @observable ByteData data;
   @observable int count;
   @observable String reason;
+  @observable String exceptions;
   int chunkIndex, chunkCount, nodeCount;
 
   @observable bool get isPauseEvent {
@@ -1537,6 +1548,9 @@ class ServiceEvent extends ServiceObject {
     if (map['count'] != null) {
       count = map['count'];
     }
+    if (map['_exceptions'] != null) {
+      exceptions = map['_exceptions'];
+    }
   }
 
   String toString() {
@@ -2091,7 +2105,7 @@ class ServiceFunction extends ServiceObject with Coverage {
   @observable bool isDart;
   @observable ProfileFunction profile;
 
-  bool get canCache => true;
+  bool get canCache => !_id.startsWith(ServiceMap.objectIdRingPrefix);
   bool get immutable => false;
 
   ServiceFunction._empty(ServiceObject owner) : super._empty(owner);
@@ -2344,7 +2358,8 @@ class Script extends ServiceObject with Coverage {
   @observable int lineOffset;
   @observable int columnOffset;
   @observable Library library;
-  bool get canCache => true;
+
+  bool get canCache => !_id.startsWith(ServiceMap.objectIdRingPrefix);

[Cutch, 2015/06/12 13:10:47]

A better way to fix handle this:

Whenever an "id" is fixed (and can be cached) there is a "fixedId" bit sent:

AddProperty("fixedId", true);

I never hooked it up on the Dart side. The correct fix is use this field in the
service library

_canCache = map['fixedId'] == true;
bool get canCache => _canCache;

[rmacnak, 2015/06/15 17:53:51]

Done.

   bool get immutable => true;
 
   String _shortUri;
@@ -3254,6 +3269,8 @@ class Frame extends ServiceObject {
     this.code = map['code'];
     this.variables = map['vars'];
   }
+
+  String toString() => "Frame(${function.qualifiedName})";
 }