v8/test/mjsunit/debug-stepin-function-call.js

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// 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
// Get the Debug object exposed from the debug context global object.
Debug = debug.Debug
var exception = null;
var state = 0;
// Simple debug event handler which first time will cause 'step in' action
// to get into g.call and than check that execution is pauesed inside
// function 'g'.
function listener(event, exec_state, event_data, data) {
try {
if (event == Debug.DebugEvent.Break) {
if (state == 0) {
// Step into f2.call:
exec_state.prepareStep(Debug.StepAction.StepIn, 2);
state = 2;
} else if (state == 2) {
assertEquals('g', event_data.func().name());
assertEquals(' return t + 1; // expected line',
event_data.sourceLineText());
state = 3;
}
}
} catch(e) {
exception = e;
}
};
// Add the debug event listener.
Debug.setListener(listener);
// Sample functions.
function g(t) {
return t + 1; // expected line
}
// Test step into function call from a function without local variables.
function call1() {
debugger;
g.call(null, 3);
}
// Test step into function call from a function with some local variables.
function call2() {
var aLocalVar = 'test';
var anotherLocalVar = g(aLocalVar) + 's';
var yetAnotherLocal = 10;
debugger;
g.call(null, 3);
}
// Test step into function call which is a part of an expression.
function call3() {
var alias = g;
debugger;
var r = 10 + alias.call(null, 3);
var aLocalVar = 'test';
var anotherLocalVar = g(aLocalVar) + 's';
var yetAnotherLocal = 10;
}
// Test step into function call from a function with some local variables.
function call4() {
var alias = g;
debugger;
alias.call(null, 3);
var aLocalVar = 'test';
var anotherLocalVar = g(aLocalVar) + 's';
var yetAnotherLocal = 10;
}
// Test step into function apply from a function without local variables.
function apply1() {
debugger;
g.apply(null, [3]);
}
// Test step into function apply from a function with some local variables.
function apply2() {
var aLocalVar = 'test';
var anotherLocalVar = g(aLocalVar) + 's';
var yetAnotherLocal = 10;
debugger;
g.apply(null, [3, 4]);
}
// Test step into function apply which is a part of an expression.
function apply3() {
var alias = g;
debugger;
var r = 10 + alias.apply(null, [3, 'unused arg']);
var aLocalVar = 'test';
var anotherLocalVar = g(aLocalVar) + 's';
var yetAnotherLocal = 10;
}
// Test step into function apply from a function with some local variables.
function apply4() {
var alias = g;
debugger;
alias.apply(null, [3]);
var aLocalVar = 'test';
var anotherLocalVar = g(aLocalVar) + 's';
var yetAnotherLocal = 10;
}
var testFunctions =
[call1, call2, call3, call4, apply1, apply2, apply3, apply4];
for (var i = 0; i < testFunctions.length; i++) {
state = 0;
testFunctions[i]();
assertNull(exception);
assertEquals(3, state);
}
// Get rid of the debug event listener.
Debug.setListener(null);