Debugger support to display global variables

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");
 
@@ skipping 20 matching lines @@
   bt  Show backtrace
   r   Resume execution
   s   Single step
   so  Step over
   si  Step into
   sbp [<file>] <line> Set breakpoint
   rbp <id> Remove breakpoint with given id
   po <id> Print object info for given id
   pc <id> Print class info for given id
   ll  List loaded libraries
-  pl <id> Print dlibrary info for given id
+  pl <id> Print library info for given id
+  pg <id> Print global variables visible given library

[siva, 2012/06/26 18:46:28]

This line doesn't seem to read well.

Did you mean 'Print global variables visible for given library id'

   ls <libname> 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
   h   Print help
 """);
 }
 
 
 void quitShell() {
   vmStream.close();
@@ skipping 61 matching lines @@
                 "params": {"objectId": Math.parseInt(args[1]) }};
     sendCmd(cmd).then((result) => handleGetObjPropsResponse(result));
   } else if (command == "pc" && args.length == 2) {
     var cmd = { "id": seqNum, "command": "getClassProperties",
                 "params": {"classId": Math.parseInt(args[1]) }};
     sendCmd(cmd).then((result) => handleGetClassPropsResponse(result));
   } else if (command == "pl" && args.length == 2) {
     var cmd = { "id": seqNum, "command": "getLibraryProperties",
                 "params": {"libraryId": Math.parseInt(args[1]) }};
     sendCmd(cmd).then((result) => handleGetLibraryPropsResponse(result));
+  } else if (command == "pg" && args.length == 2) {
+    var cmd = { "id": seqNum, "command": "getGlobalVariables",
+                "params": {"libraryId": Math.parseInt(args[1]) }};
+    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 == "q") {
@@ skipping 74 matching lines @@
   assert(globals != null);
   if (globals.length > 0) {
     print("  global variables:");
     for (int i = 0; i < globals.length; i++) {
       printNamedObject(globals[i]);
     }
   }
 }
 
 
+handleGetGlobalVarsResponse(response) {
+  List globals = response["result"]["globals"];
+  for (int i = 0; i < globals.length; i++) {
+    printNamedObject(globals[i]);
+  }
+}
+
+
 handleGetSourceResponse(response) {
   Map result = response["result"];
   String source = result["text"];
   print("Source text:\n$source\n--------");
 }
 
 
 void handleGetLibraryResponse(response) {
   Map result = response["result"];
   List libs = result["libraries"];
@@ skipping 33 matching lines @@
 void handleStackTraceResponse(response) {
   Map result = response["result"];
   List callFrames = result["callFrames"];
   assert(callFrames != null);
   printStackTrace(callFrames);
 }
 
 
 void printStackFrame(frame_num, Map frame) {
   var fname = frame["functionName"];
+  var libId = frame["libraryId"];
   var url = frame["location"]["url"];
   var line = frame["location"]["lineNumber"];
-  print("$frame_num  $fname ($url:$line)");
+  print("$frame_num  $fname ($url:$line) (lib $libId)");
   List locals = frame["locals"];
   for (int i = 0; i < locals.length; i++) {
     printNamedObject(locals[i]);
   }
 }
 
 
 void printStackTrace(List frames) {
   for (int i = 0; i < frames.length; i++) {
     printStackFrame(i, frames[i]);
@@ skipping 99 matching lines @@
   };
   vmInStream.onError = (err) {
     print("Error in debug connection: $err");
     quitShell();
   };
   vmInStream.onClosed = () {
     print("VM debugger connection closed");
     quitShell();
   };
 }