CSE2410 Fall 2014 Bounce

// Copyright 2008 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

// The functions used for testing backtraces. They are at the top to make the

// testing of source line/column easier.

function f(x, y) {

  a=1;

};

function g() {

  new f(1);

};

// Get the Debug object exposed from the debug context global object.

Debug = debug.Debug

listenerCalled = false;

exception = false;

function ParsedResponse(json) {

  this.response_ = eval('(' + json + ')');

  this.refs_ = [];

  if (this.response_.refs) {

    for (var i = 0; i < this.response_.refs.length; i++) {

      this.refs_[this.response_.refs[i].handle] = this.response_.refs[i];

    }

  }

}

ParsedResponse.prototype.response = function() {

  return this.response_;

}

ParsedResponse.prototype.body = function() {

  return this.response_.body;

}

ParsedResponse.prototype.lookup = function(handle) {

  return this.refs_[handle];

}

function listener(event, exec_state, event_data, data) {

  try {

  if (event == Debug.DebugEvent.Break)

  {

    // The expected backtrace is

    // 0: f

    // 1: g

    // 2: [anonymous]

    var response;

    var backtrace;

    var frame;

    var source;

    // Get the debug command processor.

    var dcp = exec_state.debugCommandProcessor();

    // Get the backtrace.

    var json;

    json = '{"seq":0,"type":"request","command":"backtrace"}'

    response = new ParsedResponse(dcp.processDebugJSONRequest(json));

    backtrace = response.body();

    assertEquals(0, backtrace.fromFrame);

    assertEquals(3, backtrace.toFrame);

    assertEquals(3, backtrace.totalFrames);

    var frames = backtrace.frames;

    assertEquals(3, frames.length);

    for (var i = 0; i < frames.length; i++) {

      assertEquals('frame', frames[i].type);

    }

    assertEquals(0, frames[0].index);

    assertEquals("f", response.lookup(frames[0].func.ref).name);

    assertEquals(1, frames[1].index);

    assertEquals("g", response.lookup(frames[1].func.ref).name);

    assertEquals(2, frames[2].index);

    assertEquals("", response.lookup(frames[2].func.ref).name);

    // Get backtrace with two frames.

    json = '{"seq":0,"type":"request","command":"backtrace","arguments":{"fromFrame":1,"toFrame":3}}'

    response = new ParsedResponse(dcp.processDebugJSONRequest(json));

    backtrace = response.body();

    assertEquals(1, backtrace.fromFrame);

    assertEquals(3, backtrace.toFrame);

    assertEquals(3, backtrace.totalFrames);

    var frames = backtrace.frames;

    assertEquals(2, frames.length);

    for (var i = 0; i < frames.length; i++) {

      assertEquals('frame', frames[i].type);

    }

    assertEquals(1, frames[0].index);

    assertEquals("g", response.lookup(frames[0].func.ref).name);

    assertEquals(2, frames[1].index);

    assertEquals("", response.lookup(frames[1].func.ref).name);

    // Get the individual frames.

    json = '{"seq":0,"type":"request","command":"frame"}'

    response = new ParsedResponse(dcp.processDebugJSONRequest(json));

    frame = response.body();

    assertEquals(0, frame.index);

    assertEquals("f", response.lookup(frame.func.ref).name);

    assertTrue(frame.constructCall);

    assertEquals(31, frame.line);

    assertEquals(3, frame.column);

    assertEquals(2, frame.arguments.length);

    assertEquals('x', frame.arguments[0].name);

    assertEquals('number', response.lookup(frame.arguments[0].value.ref).type);

    assertEquals(1, response.lookup(frame.arguments[0].value.ref).value);

    assertEquals('y', frame.arguments[1].name);

    assertEquals('undefined', response.lookup(frame.arguments[1].value.ref).type);

    json = '{"seq":0,"type":"request","command":"frame","arguments":{"number":0}}'

    response = new ParsedResponse(dcp.processDebugJSONRequest(json));

    frame = response.body();

    assertEquals(0, frame.index);

    assertEquals("f", response.lookup(frame.func.ref).name);

    assertEquals(31, frame.line);

    assertEquals(3, frame.column);

    assertEquals(2, frame.arguments.length);

    assertEquals('x', frame.arguments[0].name);

    assertEquals('number', response.lookup(frame.arguments[0].value.ref).type);

    assertEquals(1, response.lookup(frame.arguments[0].value.ref).value);

    assertEquals('y', frame.arguments[1].name);

    assertEquals('undefined', response.lookup(frame.arguments[1].value.ref).type);

    json = '{"seq":0,"type":"request","command":"frame","arguments":{"number":1}}'

    response = new ParsedResponse(dcp.processDebugJSONRequest(json));

    frame = response.body();

    assertEquals(1, frame.index);

    assertEquals("g", response.lookup(frame.func.ref).name);

    assertFalse(frame.constructCall);

    assertEquals(35, frame.line);

    assertEquals(2, frame.column);

    assertEquals(0, frame.arguments.length);

    json = '{"seq":0,"type":"request","command":"frame","arguments":{"number":2}}'

    response = new ParsedResponse(dcp.processDebugJSONRequest(json));

    frame = response.body();

    assertEquals(2, frame.index);

    assertEquals("", response.lookup(frame.func.ref).name);

    // Source slices for the individual frames (they all refer to this script).

    json = '{"seq":0,"type":"request","command":"source",' +

            '"arguments":{"frame":0,"fromLine":30,"toLine":32}}'

    response = new ParsedResponse(dcp.processDebugJSONRequest(json));

    source = response.body();

    assertEquals("function f(x, y) {", source.source.substring(0, 18));

    assertEquals(30, source.fromLine);

    assertEquals(32, source.toLine);

    json = '{"seq":0,"type":"request","command":"source",' +

            '"arguments":{"frame":1,"fromLine":31,"toLine":32}}'

    response = new ParsedResponse(dcp.processDebugJSONRequest(json));

    source = response.body();

    assertEquals("  a=1;", source.source.substring(0, 6));

    assertEquals(31, source.fromLine);

    assertEquals(32, source.toLine);

    json = '{"seq":0,"type":"request","command":"source",' +

            '"arguments":{"frame":2,"fromLine":35,"toLine":36}}'

    response = new ParsedResponse(dcp.processDebugJSONRequest(json));

    source = response.body();

    assertEquals("  new f(1);", source.source.substring(0, 11));

    assertEquals(35, source.fromLine);

    assertEquals(36, source.toLine);

    // Test line interval way beyond this script will result in an error.

    json = '{"seq":0,"type":"request","command":"source",' +

            '"arguments":{"frame":0,"fromLine":10000,"toLine":20000}}'

    response = new ParsedResponse(dcp.processDebugJSONRequest(json));

    assertFalse(response.response().success);

    // Test without arguments.

    json = '{"seq":0,"type":"request","command":"source"}'

    response = new ParsedResponse(dcp.processDebugJSONRequest(json));

    source = response.body();

    assertEquals(Debug.findScript(f).source, source.source);

    listenerCalled = true;

  }

  } catch (e) {

    exception = e

  };

};

// Add the debug event listener.

Debug.setListener(listener);

// Set a break point and call to invoke the debug event listener.

Debug.setBreakPoint(f, 0, 0);

g();

// Make sure that the debug event listener vas invoked.

assertFalse(exception, "exception in listener");

assertTrue(listenerCalled);