debug-evaluate.js 5.58 KB
Newer Older
1
// Copyright 2008 the V8 project authors. All rights reserved.
2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61
// 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":"evaluate"'

function safeEval(code) {
  try {
    return eval('(' + code + ')');
  } catch (e) {
    assertEquals(void 0, e);
    return undefined;
  }
}

function testRequest(dcp, arguments, success, result) {
  // Generate request with the supplied arguments.
  var request;
  if (arguments) {
    request = '{' + base_request + ',"arguments":' + arguments + '}';
  } else {
    request = '{' + base_request + '}'
  }
  var response = safeEval(dcp.processDebugJSONRequest(request));
  if (success) {
    assertTrue(response.success, request + ' -> ' + response.message);
    assertEquals(result, response.body.value);
  } else {
    assertFalse(response.success, request + ' -> ' + response.message);
  }
62 63
  assertEquals(response.running, "unspecified_running_state",
               request + ' -> expected not running');
64 65 66 67
}

function listener(event, exec_state, event_data, data) {
  try {
68 69
    if (event == Debug.DebugEvent.Break) {
      // Get the debug command processor.
70
      var dcp = exec_state.debugCommandProcessor("unspecified_running_state");
71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89

      // Test some illegal evaluate requests.
      testRequest(dcp, void 0, false);
      testRequest(dcp, '{"expression":"1","global"=true}', false);
      testRequest(dcp, '{"expression":"a","frame":4}', false);

      // Test some legal evaluate requests.
      testRequest(dcp, '{"expression":"1+2"}', true, 3);
      testRequest(dcp, '{"expression":"a+2"}', true, 5);
      testRequest(dcp, '{"expression":"({\\"a\\":1,\\"b\\":2}).b+2"}', true, 4);

      // Test evaluation of a in the stack frames and the global context.
      testRequest(dcp, '{"expression":"a"}', true, 3);
      testRequest(dcp, '{"expression":"a","frame":0}', true, 3);
      testRequest(dcp, '{"expression":"a","frame":1}', true, 2);
      testRequest(dcp, '{"expression":"a","frame":2}', true, 1);
      testRequest(dcp, '{"expression":"a","global":true}', true, 1);
      testRequest(dcp, '{"expression":"this.a","global":true}', true, 1);

90 91 92 93
      // Test that the whole string text is returned if maxStringLength
      // parameter is passed.
      testRequest(
          dcp,
94
          '{"expression":"this.longString","global":true,"maxStringLength":-1}',
95 96 97 98
          true,
          longString);
      testRequest(
          dcp,
99
          '{"expression":"this.longString","global":true,"maxStringLength":' +
100 101 102 103 104 105
              longString.length + '}',
          true,
          longString);
      var truncatedStringSuffix = '... (length: ' + longString.length + ')';
      testRequest(
          dcp,
106
          '{"expression":"this.longString","global":true,"maxStringLength":0}',
107 108 109 110
          true,
          truncatedStringSuffix);
      testRequest(
          dcp,
111
          '{"expression":"this.longString","global":true,"maxStringLength":1}',
112 113 114 115 116 117 118 119 120
          true,
          longString.charAt(0) + truncatedStringSuffix);
      // Test that by default string is truncated to first 80 chars.
      testRequest(
          dcp,
          '{"expression":"this.longString","global":true}',
          true,
          longString.substring(0, 80) + truncatedStringSuffix);

121 122 123
      // Indicate that all was processed.
      listenerComplete = true;
    }
124
  } catch (e) {
125
   exception = e
126 127 128 129
  };
};

// Add the debug event listener.
130
Debug.setListener(listener);
131 132 133 134 135 136 137 138

function f() {
  var a = 3;
};

function g() {
  var a = 2;
  f();
139
  return a;  // Use the value to prevent it being removed by DCE.
140 141 142 143
};

a = 1;

144 145 146 147 148 149
// String which is longer than 80 chars.
var longString = "1234567890_";
for (var i = 0; i < 4; i++) {
  longString += longString;
}

150 151 152 153
// Set a break point at return in f and invoke g to hit the breakpoint.
Debug.setBreakPoint(f, 2, 0);
g();

154
assertFalse(exception, "exception in listener")
155 156
// Make sure that the debug event listener vas invoked.
assertTrue(listenerComplete, "listener did not run to completion");