v8/test/mjsunit/debug-evaluate.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
listenerComplete = false;
exception = false;
// The base part of all evaluate requests.
var base_request = '"seq":0,"type":"request","command":"evaluate"'
function safeEval(code) {
try {
return eval('(' + code + ')');
} catch (e) {
assertEquals(void 0, e);
return undefined;
}
}
function testRequest(dcp, arguments, success, result) {
// Generate request with the supplied arguments.
var request;
if (arguments) {
request = '{' + base_request + ',"arguments":' + arguments + '}';
} else {
request = '{' + base_request + '}'
}
var response = safeEval(dcp.processDebugJSONRequest(request));
if (success) {
assertTrue(response.success, request + ' -> ' + response.message);
assertEquals(result, response.body.value);
} else {
assertFalse(response.success, request + ' -> ' + response.message);
}
assertEquals(response.running, "unspecified_running_state",
request + ' -> expected not running');
}
function listener(event, exec_state, event_data, data) {
try {
if (event == Debug.DebugEvent.Break) {
// Get the debug command processor.
var dcp = exec_state.debugCommandProcessor("unspecified_running_state");
// Test some illegal evaluate requests.
testRequest(dcp, void 0, false);
testRequest(dcp, '{"expression":"1","global"=true}', false);
testRequest(dcp, '{"expression":"a","frame":4}', false);
// Test some legal evaluate requests.
testRequest(dcp, '{"expression":"1+2"}', true, 3);
testRequest(dcp, '{"expression":"a+2"}', true, 5);
testRequest(dcp, '{"expression":"({\\"a\\":1,\\"b\\":2}).b+2"}', true, 4);
// Test evaluation of a in the stack frames and the global context.
testRequest(dcp, '{"expression":"a"}', true, 3);
testRequest(dcp, '{"expression":"a","frame":0}', true, 3);
testRequest(dcp, '{"expression":"a","frame":1}', true, 2);
testRequest(dcp, '{"expression":"a","frame":2}', true, 1);
testRequest(dcp, '{"expression":"a","global":true}', true, 1);
testRequest(dcp, '{"expression":"this.a","global":true}', true, 1);
// Test that the whole string text is returned if maxStringLength
// parameter is passed.
testRequest(
dcp,
'{"expression":"this.longString","global":true,"maxStringLength":-1}',
true,
longString);
testRequest(
dcp,
'{"expression":"this.longString","global":true,"maxStringLength":' +
longString.length + '}',
true,
longString);
var truncatedStringSuffix = '... (length: ' + longString.length + ')';
testRequest(
dcp,
'{"expression":"this.longString","global":true,"maxStringLength":0}',
true,
truncatedStringSuffix);
testRequest(
dcp,
'{"expression":"this.longString","global":true,"maxStringLength":1}',
true,
longString.charAt(0) + truncatedStringSuffix);
// Test that by default string is truncated to first 80 chars.
testRequest(
dcp,
'{"expression":"this.longString","global":true}',
true,
longString.substring(0, 80) + truncatedStringSuffix);
// Indicate that all was processed.
listenerComplete = true;
}
} catch (e) {
exception = e
};
};
// Add the debug event listener.
Debug.setListener(listener);
function f() {
var a = 3;
};
function g() {
var a = 2;
f();
};
a = 1;
// String which is longer than 80 chars.
var longString = "1234567890_";
for (var i = 0; i < 4; i++) {
longString += longString;
}
// Set a break point at return in f and invoke g to hit the breakpoint.
Debug.setBreakPoint(f, 2, 0);
g();
assertFalse(exception, "exception in listener")
// Make sure that the debug event listener vas invoked.
assertTrue(listenerComplete, "listener did not run to completion");