Add crash dumps to service protocol and Observatory

runtime/vm/service/vmservice.dart

Index: runtime/vm/service/vmservice.dart
diff --git a/runtime/vm/service/vmservice.dart b/runtime/vm/service/vmservice.dart
index ee6f2cd22a63a4007e26af8cc33944a594dfc187..e86b58f4902400424f56225ed1fed6b621a71eaa 100644
--- a/runtime/vm/service/vmservice.dart
+++ b/runtime/vm/service/vmservice.dart
@@ -140,6 +140,49 @@ class VMService extends MessageRouter {
     message.setResponse(JSON.encode(result));
   }
 
+  Future<String> _getCrashDump() async {
+    final perIsolateRequests = [
+        // ?isolateId=<isolate id> will be appended to each of these requests.
+        Uri.parse('getIsolate'),             // Isolate information.
+        Uri.parse('_getAllocationProfile'),  // State of heap.
+        Uri.parse('getStack?full=true'),     // Call stack + local variables.
+    ];
+
+    // Snapshot of running isolates.
+    var isolates = runningIsolates.isolates.values.toList();
+
+    // Collect the mapping from request uris to responses.
+    var responses = {
+    };
+
+    // Request VM.
+    var getVM = Uri.parse('getVM');
+    var getVmResponse = await new Message.fromUri(getVM).sendToVM();
+    responses[getVM.toString()] = JSON.decode(getVmResponse);
+
+    // Request command line flags.
+    var getFlagList = Uri.parse('getFlagList');
+    var getFlagListResponse = await new Message.fromUri(getFlagList).sendToVM();
+    responses[getFlagList.toString()] = JSON.decode(getFlagListResponse);
+
+    // Make requests to each isolate.
+    for (var isolate in isolates) {
+      for (var request in perIsolateRequests) {
+        var message = new Message.forIsolate(request, isolate);
+        var response = await isolate.route(message);
+        // Decode the JSON and and insert it into the map. The map key
+        // is the request Uri.
+        responses[message.toUri().toString()] = JSON.decode(response);
+      }
+    }
+
+    // Encode the entire crash dump.
+    return JSON.encode({
+      'type' : '_crashDump',
+      'responses' : responses,
+    });
+  }
+
   Future<String> route(Message message) {
     if (message.completed) {
       return message.response;
@@ -149,6 +192,9 @@ class VMService extends MessageRouter {
       _clientCollection(message);
       return message.response;
     }
+    if (message.method == '_getCrashDump') {
+      return _getCrashDump();
+    }
     if (message.params['isolateId'] != null) {
       return runningIsolates.route(message);
     }