Added the 'references' command to the debugger protocol to provide access to ...

test/mjsunit/debug-references.js

+// Copyright 2009 the V8 project authors. All rights reserved.
+// Redistribution and use in source and binary forms, with or without
+// modification, are permitted provided that the following conditions are
+// met:
+//
+//     * Redistributions of source code must retain the above copyright
+//       notice, this list of conditions and the following disclaimer.
+//     * Redistributions in binary form must reproduce the above
+//       copyright notice, this list of conditions and the following
+//       disclaimer in the documentation and/or other materials provided
+//       with the distribution.
+//     * Neither the name of Google Inc. nor the names of its
+//       contributors may be used to endorse or promote products derived
+//       from this software without specific prior written permission.
+//
+// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+// Flags: --expose-debug-as debug
+// Get the Debug object exposed from the debug context global object.
+Debug = debug.Debug
+
+listenerComplete = false;
+exception = false;
+
+// The base part of all evaluate requests.
+var base_request = '"seq":0,"type":"request","command":"references"'
+
+function safeEval(code) {
+  try {
+    return eval('(' + code + ')');
+  } catch (e) {
+    assertEquals(void 0, e);
+    return undefined;
+  }
+}
+
+function testRequest(dcp, arguments, success, count) {
+  // Generate request with the supplied arguments.
+  var request;
+  if (arguments) {
+    request = '{' + base_request + ',"arguments":' + arguments + '}';
+  } else {
+    request = '{' + base_request + '}'
+  }
+  
+  // Process the request and check expectation.
+  var response = safeEval(dcp.processDebugJSONRequest(request));
+  if (success) {
+    assertTrue(response.success, request + ' -> ' + response.message);
+    assertTrue(response.body instanceof Array);
+    if (count) {
+      assertEquals(count, response.body.length);
+    } else {
+      assertTrue(response.body.length > 0);
+    }
+  } else {
+    assertFalse(response.success, request + ' -> ' + response.message);
+  }
+  assertFalse(response.running, request + ' -> expected not running');
+}
+
+function listener(event, exec_state, event_data, data) {
+  try {
+  if (event == Debug.DebugEvent.Break) {
+    // Get the debug command processor.
+    var dcp = exec_state.debugCommandProcessor();
+
+    // Test some illegal references requests.
+    testRequest(dcp, void 0, false);
+    testRequest(dcp, '{"handle":"a"}', false);
+    testRequest(dcp, '{"handle":1}', false);
+    testRequest(dcp, '{"type":"referencedBy"}', false);
+    testRequest(dcp, '{"type":"constructedBy"}', false);
+
+    // Evaluate Point.
+    var evaluate_point = '{"seq":0,"type":"request","command":"evaluate",' +
+                         '"arguments":{"expression":"Point"}}';
+    var response = safeEval(dcp.processDebugJSONRequest(evaluate_point));
+    assertTrue(response.success, "Evaluation of Point failed");
+    var handle = response.body.handle;
+    
+    // Test some legal references requests.
+    testRequest(dcp, '{"handle":' + handle + ',"type":"referencedBy"}', true);
+    testRequest(dcp, '{"handle":' + handle + ',"type":"constructedBy"}',
+                true, 2);
+
+    // Indicate that all was processed.
+    listenerComplete = true;
+  }
+  } catch (e) {
+    exception = e
+  };
+};
+
+// Add the debug event listener.
+Debug.setListener(listener);
+
+// Test constructor and objects.
+function Point(x, y) { this.x_ = x; this.y_ = y;}
+p = new Point(0,0);
+q = new Point(1,2);
+
+// Enter debugger causing the event listener to be called.
+debugger;
+
+// Make sure that the debug event listener vas invoked.
+assertFalse(exception, "exception in listener")
+assertTrue(listenerComplete, "listener did not run to completion");