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// Copyright 2012 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
function FindCallFrame(exec_state, frame_code) {
var number = Number(frame_code);
if (number >= 0) {
return exec_state.frame(number);
} else {
for (var i = 0; i < exec_state.frameCount(); i++) {
var frame = exec_state.frame(i);
var func_mirror = frame.func();
if (frame_code == func_mirror.name()) {
return frame;
}
}
}
throw new Error("Failed to find function name " + function_name);
}
function TestCase(test_scenario, expected_output) {
// Global variable, accessed from eval'd script.
test_output = "";
function TestCode() {
function A() {
// Extra stack variable. To make function not slim.
// Restarter doesn't work on slim function when stopped on 'debugger'
// statement. (There is no padding for 'debugger' statement).
var o = {};
test_output += 'A';
test_output += '=';
debugger;
return 'Capybara';
}
function B(p1, p2) {
test_output += 'B';
return A();
}
function C() {
test_output += 'C';
// Function call with argument adaptor is intentional.
return B();
}
function D() {
test_output += 'D';
// Function call with argument adaptor is intentional.
return C(1, 2);
}
function E() {
test_output += 'E';
return D();
}
function F() {
test_output += 'F';
return E();
}
return F();
}
var scenario_pos = 0;
function DebuggerStatementHandler(exec_state) {
while (true) {
assertTrue(scenario_pos < test_scenario.length);
var change_code = test_scenario[scenario_pos++];
if (change_code == '=') {
// Continue.
return;
}
var frame = FindCallFrame(exec_state, change_code);
// Throws if fails.
Debug.LiveEdit.RestartFrame(frame);
}
}
var saved_exception = null;
function listener(event, exec_state, event_data, data) {
if (saved_exception != null) {
return;
}
if (event == Debug.DebugEvent.Break) {
try {
DebuggerStatementHandler(exec_state);
} catch (e) {
saved_exception = e;
}
} else {
print("Other: " + event);
}
}
Debug.setListener(listener);
assertEquals("Capybara", TestCode());
Debug.setListener(null);
if (saved_exception) {
print("Exception: " + saved_exception);
print("Stack: " + saved_exception.stack);
assertUnreachable();
}
print(test_output);
assertEquals(expected_output, test_output);
}
TestCase('0==', "FEDCBA=A=");
TestCase('1==', "FEDCBA=BA=");
TestCase('2==', "FEDCBA=CBA=");
TestCase('3==', "FEDCBA=DCBA=");
TestCase('4==', "FEDCBA=EDCBA=");
TestCase('5==', "FEDCBA=FEDCBA=");
TestCase('=', "FEDCBA=");
TestCase('C==', "FEDCBA=CBA=");
TestCase('B=C=A=D==', "FEDCBA=BA=CBA=A=DCBA=");
// Successive restarts don't work now and require additional fix.
//TestCase('BCDE==', "FEDCBA=EDCBA=");
//TestCase('BC=BCDE==', "FEDCBA=CBA=EDCBA=");
//TestCase('EF==', "FEDCBA=FEDCBA=");