v8/test/mjsunit/debug-stepout-recursive-function.js

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// 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
var exception = null;
var step_out_count = 1;
// Simple debug event handler which counts the number of breaks hit and steps.
var break_point_hit_count = 0;
function listener(event, exec_state, event_data, data) {
try {
if (event == Debug.DebugEvent.Break) {
break_point_hit_count++;
// Continue stepping until returned to bottom frame.
if (exec_state.frameCount() > 1) {
exec_state.prepareStep(Debug.StepAction.StepOut, step_out_count);
}
}
} catch(e) {
exception = e;
}
};
function BeginTest(name) {
test_name = name;
break_point_hit_count = 0;
exception = null;
}
function EndTest(expected_break_point_hit_count) {
assertEquals(expected_break_point_hit_count, break_point_hit_count, test_name);
assertNull(exception, test_name);
test_name = null;
}
// Add the debug event listener.
Debug.setListener(listener);
var shouldBreak = null;
function fact(x) {
if (shouldBreak(x)) {
debugger;
}
if (x < 2) {
return 1;
} else {
return x*fact(x-1);
}
}
BeginTest('Test 1');
shouldBreak = function(x) { return x == 3; };
step_out_count = 1;
fact(3);
EndTest(2);
BeginTest('Test 2');
shouldBreak = function(x) { return x == 2; };
step_out_count = 1;
fact(3);
EndTest(3);
BeginTest('Test 3');
shouldBreak = function(x) { return x == 1; };
step_out_count = 2;
fact(3);
EndTest(2);
BeginTest('Test 4');
shouldBreak = function(x) { return x == 1 || x == 3; };
step_out_count = 2;
fact(3);
EndTest(3);
// Get rid of the debug event listener.
Debug.setListener(null);