v8/test/mjsunit/debug-set-variable-value.js
2015-03-26 08:15:45 +00:00

310 lines
8.6 KiB
JavaScript

// 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.
var Debug = debug.Debug;
var DebugCommandProcessor = debug.DebugCommandProcessor;
// Accepts a function/closure 'fun' that must have a debugger statement inside.
// A variable 'variable_name' must be initialized before debugger statement
// and returned after the statement. The test will alter variable value when
// on debugger statement and check that returned value reflects the change.
function RunPauseTest(scope_number, expected_old_result, variable_name,
new_value, expected_new_result, fun) {
var actual_old_result = fun();
assertEquals(expected_old_result, actual_old_result);
var listener_delegate;
var listener_called = false;
var exception = null;
function listener_delegate(exec_state) {
var scope = exec_state.frame(0).scope(scope_number);
scope.setVariableValue(variable_name, new_value);
}
function listener(event, exec_state, event_data, data) {
try {
if (event == Debug.DebugEvent.Break) {
listener_called = true;
listener_delegate(exec_state);
}
} catch (e) {
exception = e;
}
}
// Add the debug event listener.
Debug.setListener(listener);
var actual_new_value;
try {
actual_new_result = fun();
} finally {
Debug.setListener(null);
}
if (exception != null) {
assertUnreachable("Exception in listener\n" + exception.stack);
}
assertTrue(listener_called);
assertEquals(expected_new_result, actual_new_result);
}
// Accepts a closure 'fun' that returns a variable from it's outer scope.
// The test changes the value of variable via the handle to function and checks
// that the return value changed accordingly.
function RunClosureTest(scope_number, expected_old_result, variable_name,
new_value, expected_new_result, fun) {
var actual_old_result = fun();
assertEquals(expected_old_result, actual_old_result);
var fun_mirror = Debug.MakeMirror(fun);
var scope = fun_mirror.scope(scope_number);
scope.setVariableValue(variable_name, new_value);
var actual_new_result = fun();
assertEquals(expected_new_result, actual_new_result);
}
function ClosureTestCase(scope_index, old_result, variable_name, new_value,
new_result, success_expected, factory) {
this.scope_index_ = scope_index;
this.old_result_ = old_result;
this.variable_name_ = variable_name;
this.new_value_ = new_value;
this.new_result_ = new_result;
this.success_expected_ = success_expected;
this.factory_ = factory;
}
ClosureTestCase.prototype.run_pause_test = function() {
var th = this;
var fun = this.factory_(true);
this.run_and_catch_(function() {
RunPauseTest(th.scope_index_ + 1, th.old_result_, th.variable_name_,
th.new_value_, th.new_result_, fun);
});
}
ClosureTestCase.prototype.run_closure_test = function() {
var th = this;
var fun = this.factory_(false);
this.run_and_catch_(function() {
RunClosureTest(th.scope_index_, th.old_result_, th.variable_name_,
th.new_value_, th.new_result_, fun);
});
}
ClosureTestCase.prototype.run_and_catch_ = function(runnable) {
if (this.success_expected_) {
runnable();
} else {
assertThrows(runnable);
}
}
// Test scopes visible from closures.
var closure_test_cases = [
new ClosureTestCase(0, 'cat', 'v1', 5, 5, true,
function Factory(debug_stop) {
var v1 = 'cat';
return function() {
if (debug_stop) debugger;
return v1;
}
}),
new ClosureTestCase(0, 4, 't', 7, 9, true, function Factory(debug_stop) {
var t = 2;
var r = eval("t");
return function() {
if (debug_stop) debugger;
return r + t;
}
}),
new ClosureTestCase(0, 6, 't', 10, 13, true, function Factory(debug_stop) {
var t = 2;
var r = eval("t = 3");
return function() {
if (debug_stop) debugger;
return r + t;
}
}),
new ClosureTestCase(0, 17, 's', 'Bird', 'Bird', true,
function Factory(debug_stop) {
eval("var s = 17");
return function() {
if (debug_stop) debugger;
return s;
}
}),
new ClosureTestCase(2, 'capybara', 'foo', 77, 77, true,
function Factory(debug_stop) {
var foo = "capybara";
return (function() {
var bar = "fish";
try {
throw {name: "test exception"};
} catch (e) {
return function() {
if (debug_stop) debugger;
bar = "beast";
return foo;
}
}
})();
}),
new ClosureTestCase(0, 'AlphaBeta', 'eee', 5, '5Beta', true,
function Factory(debug_stop) {
var foo = "Beta";
return (function() {
var bar = "fish";
try {
throw "Alpha";
} catch (eee) {
return function() {
if (debug_stop) debugger;
return eee + foo;
}
}
})();
})
];
for (var i = 0; i < closure_test_cases.length; i++) {
closure_test_cases[i].run_pause_test();
}
for (var i = 0; i < closure_test_cases.length; i++) {
closure_test_cases[i].run_closure_test();
}
// Test local scope.
RunPauseTest(0, 'HelloYou', 'u', 'We', 'HelloWe', (function Factory() {
return function() {
var u = "You";
var v = "Hello";
debugger;
return v + u;
}
})());
RunPauseTest(0, 'Helloworld', 'p', 'GoodBye', 'HelloGoodBye',
(function Factory() {
function H(p) {
var v = "Hello";
debugger;
return v + p;
}
return function() {
return H("world");
}
})());
RunPauseTest(0, 'mouse', 'v1', 'dog', 'dog', (function Factory() {
return function() {
var v1 = 'cat';
eval("v1 = 'mouse'");
debugger;
return v1;
}
})());
RunPauseTest(0, 'mouse', 'v1', 'dog', 'dog', (function Factory() {
return function() {
eval("var v1 = 'mouse'");
debugger;
return v1;
}
})());
// Check that we correctly update local variable that
// is referenced from an inner closure.
RunPauseTest(0, 'Blue', 'v', 'Green', 'Green', (function Factory() {
return function() {
function A() {
var v = "Blue";
function Inner() {
return void v;
}
debugger;
return v;
}
return A();
}
})());
// Check that we correctly update parameter, that is known to be stored
// both on stack and in heap.
RunPauseTest(0, 5, 'p', 2012, 2012, (function Factory() {
return function() {
function A(p) {
function Inner() {
return void p;
}
debugger;
return p;
}
return A(5);
}
})());
// Test value description protocol JSON
assertEquals(true, DebugCommandProcessor.resolveValue_({value: true}));
assertSame(null, DebugCommandProcessor.resolveValue_({type: "null"}));
assertSame(undefined,
DebugCommandProcessor.resolveValue_({type: "undefined"}));
assertSame("123", DebugCommandProcessor.resolveValue_(
{type: "string", stringDescription: "123"}));
assertSame(123, DebugCommandProcessor.resolveValue_(
{type: "number", stringDescription: "123"}));
assertSame(Number, DebugCommandProcessor.resolveValue_(
{handle: Debug.MakeMirror(Number).handle()}));
assertSame(RunClosureTest, DebugCommandProcessor.resolveValue_(
{handle: Debug.MakeMirror(RunClosureTest).handle()}));