1// Copyright 2008 the V8 project authors. All rights reserved. 2// Redistribution and use in source and binary forms, with or without 3// modification, are permitted provided that the following conditions are 4// met: 5// 6// * Redistributions of source code must retain the above copyright 7// notice, this list of conditions and the following disclaimer. 8// * Redistributions in binary form must reproduce the above 9// copyright notice, this list of conditions and the following 10// disclaimer in the documentation and/or other materials provided 11// with the distribution. 12// * Neither the name of Google Inc. nor the names of its 13// contributors may be used to endorse or promote products derived 14// from this software without specific prior written permission. 15// 16// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 17// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 18// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR 19// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT 20// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 21// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT 22// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 23// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 24// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 25// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE 26// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 27 28// Flags: --expose-debug-as debug 29// Get the Debug object exposed from the debug context global object. 30Debug = debug.Debug 31 32// Simple debug event handler which first time hit will perform 1000 steps and 33// second time hit will evaluate and store the value of "i". If requires that 34// the global property "state" is initially zero. 35 36var bp1, bp2; 37 38function listener(event, exec_state, event_data, data) { 39 if (event == Debug.DebugEvent.Break) { 40 if (state == 0) { 41 exec_state.prepareStep(Debug.StepAction.StepIn, 1000); 42 state = 1; 43 } else if (state == 1) { 44 result = exec_state.frame().evaluate("i").value(); 45 // Clear the break point on line 2 if set. 46 if (bp2) { 47 Debug.clearBreakPoint(bp2); 48 } 49 } 50 } 51}; 52 53// Add the debug event listener. 54Debug.setListener(listener); 55 56// Test debug event for break point. 57function f() { 58 for (i = 0; i < 1000; i++) { // Line 1. 59 x = 1; // Line 2. 60 } 61}; 62 63// Set a breakpoint on the for statement (line 1). 64bp1 = Debug.setBreakPoint(f, 1); 65 66// Check that performing 1000 steps will make i 499. 67state = 0; 68result = -1; 69f(); 70assertEquals(499, result); 71 72// Check that performing 1000 steps with a break point on the statement in the 73// for loop (line 2) will only make i 0 as a real break point breaks even when 74// multiple steps have been requested. 75state = 0; 76result = -1; 77bp2 = Debug.setBreakPoint(f, 2); 78f(); 79assertEquals(0, result); 80 81// Get rid of the debug event listener. 82Debug.setListener(null); 83