- Add support to interrupt a running isolate

tools/ddbg.dart

 // Copyright (c) 2012, 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.
 
 // Simple interactive debugger shell that connects to the Dart VM's debugger
 // connection port.
 
 #import("dart:io");
 #import("dart:json");
 #import("dart:math", prefix: "Math");
@@ skipping 30 matching lines @@
   po <id> Print object info for given id
   pl <id> <idx> [<len>] Print list element/slice
   pc <id> Print class info for given id
   ll  List loaded libraries
   plib <id> Print library info for given library id
   slib <id> <true|false> Set library id debuggable
   pg <id> Print all global variables visible within given library id
   ls <lib_id> List loaded scripts in library
   gs <lib_id> <script_url> Get source text of script in library
   epi <none|all|unhandled>  Set exception pause info
+  i <id> Interrupt execution of given isolate id

[hausner, 2012/10/05 18:06:34]

Don't you also want/need a command to list isolates?

[siva, 2012/10/05 22:35:06]

Yes, but I haven't added that yet. That is the next
one. Currently I am looking at the event messages being printed and use that to
figure out the isolate ID to use.

On 2012/10/05 18:06:34, hausner wrote:

   h   Print help
 """);
 }
 
 
 void quitShell() {
   vmStream.close();
   vmSock.close();
   stdin.close();
 }
@@ skipping 89 matching lines @@
     sendCmd(cmd).then((result) => handleGetGlobalVarsResponse(result));
   } else if (command == "gs" && args.length == 3) {
     var cmd = { "id": seqNum, "command":  "getScriptSource",
                 "params": { "libraryId": Math.parseInt(args[1]),
                             "url": args[2] }};
     sendCmd(cmd).then((result) => handleGetSourceResponse(result));
   } else if (command == "epi" && args.length == 2) {
     var cmd = { "id": seqNum, "command":  "setPauseOnException",
                 "params": { "exceptions": args[1] }};
     sendCmd(cmd).then((result) => handleGenericResponse(result));
+  } else if (command == "i" && args.length == 2) {
+    var cmd = { "id": seqNum, "command": "interrupt",
+                "params": {"isolateId": Math.parseInt(args[1]) }};
+    sendCmd(cmd).then((result) => handleGenericResponse(result));
   } else if (command == "q") {
     quitShell();
   } else if (command == "h") {
     printHelp();
   } else {
     print("command '$command' not understood, try h for help");
   }
 }
 
 
@@ skipping 179 matching lines @@
 void printStackTrace(List frames) {
   for (int i = 0; i < frames.length; i++) {
     printStackFrame(i, frames[i]);
   }
 }
 
 
 void handlePausedEvent(msg) {
   assert(msg["params"] != null);
   var reason = msg["params"]["reason"];
+  var id = msg["params"]["id"];
   stackTrace = msg["params"]["callFrames"];
   assert(stackTrace != null);
   assert(stackTrace.length >= 1);
   curFrame = stackTrace[0];
   if (reason == "breakpoint") {
-    print("VM paused on breakpoint");
+    print("Isolate $id paused on breakpoint");
+  } else if (reason == "interrupted") {
+    print("Isolate $id paused due to an interrupt");
   } else {
     assert(reason == "exception");
     var excObj = msg["params"]["exception"];
-    print("VM paused on exception");
+    print("Isolate $id paused on exception");
     print(remoteObject(excObj));
   }
   print("Stack trace:");
   printStackTrace(stackTrace);
 }
 
 
 void processVmMessage(String json) {
   var msg = JSON.parse(json);
   if (msg == null) {
     return;
   }
   var event = msg["event"];
   if (event == "paused") {
     handlePausedEvent(msg);
     return;
   }
   if (event == "breakpointResolved") {
     Map params = msg["params"];
     assert(params != null);
     print("BP ${params["breakpointId"]} resolved and "
           "set at line ${params["line"]}.");
     return;
   }
+  if (event == "isolate") {
+    Map params = msg["params"];
+    assert(params != null);
+    print("Isolate ${params["id"]} has been ${params["reason"]}.");
+    return;
+  }
   if (msg["id"] != null) {
     var id = msg["id"];
     if (outstandingCommands.containsKey(id)) {
       if (msg["error"] != null) {
         print("VM says: ${msg["error"]}");
       } else {
         var completer = outstandingCommands[id];
         completer.complete(msg);
       }
       outstandingCommands.remove(id);
@@ skipping 94 matching lines @@
   };
   vmInStream.onError = (err) {
     print("Error in debug connection: $err");
     quitShell();
   };
   vmInStream.onClosed = () {
     print("VM debugger connection closed");
     quitShell();
   };
 }