v8/test/mjsunit/stack-traces.js
christian.plesner.hansen@gmail.com c1581cd5bd Added Error.captureStackTrace function.
Added utility function for capturing stack traces so that efficient
stack trace collection works for custom errors too, not just built-in
ones.

Review URL: http://codereview.chromium.org/159403


git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@2541 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
2009-07-27 12:01:32 +00:00

198 lines
5.7 KiB
JavaScript

// 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.
function testMethodNameInference() {
function Foo() { }
Foo.prototype.bar = function () { FAIL; };
(new Foo).bar();
}
function testNested() {
function one() {
function two() {
function three() {
FAIL;
}
three();
}
two();
}
one();
}
function testArrayNative() {
[1, 2, 3].map(function () { FAIL; });
}
function testImplicitConversion() {
function Nirk() { }
Nirk.prototype.valueOf = function () { FAIL; };
return 1 + (new Nirk);
}
function testEval() {
eval("function Doo() { FAIL; }; Doo();");
}
function testNestedEval() {
var x = "FAIL";
eval("function Outer() { eval('function Inner() { eval(x); }'); Inner(); }; Outer();");
}
function testValue() {
Number.prototype.causeError = function () { FAIL; };
(1).causeError();
}
function testConstructor() {
function Plonk() { FAIL; }
new Plonk();
}
function testRenamedMethod() {
function a$b$c$d() { return FAIL; }
function Wookie() { }
Wookie.prototype.d = a$b$c$d;
(new Wookie).d();
}
function testAnonymousMethod() {
(function () { FAIL }).call([1, 2, 3]);
}
function CustomError(message, stripPoint) {
this.message = message;
Error.captureStackTrace(this, stripPoint);
}
CustomError.prototype.toString = function () {
return "CustomError: " + this.message;
};
function testDefaultCustomError() {
throw new CustomError("hep-hey", undefined);
}
function testStrippedCustomError() {
throw new CustomError("hep-hey", CustomError);
}
// Utility function for testing that the expected strings occur
// in the stack trace produced when running the given function.
function testTrace(fun, expected, unexpected) {
var threw = false;
try {
fun();
} catch (e) {
for (var i = 0; i < expected.length; i++) {
assertTrue(e.stack.indexOf(expected[i]) != -1);
}
if (unexpected) {
for (var i = 0; i < unexpected.length; i++) {
assertEquals(e.stack.indexOf(unexpected[i]), -1);
}
}
threw = true;
}
assertTrue(threw);
}
// Test that the error constructor is not shown in the trace
function testCallerCensorship() {
var threw = false;
try {
FAIL;
} catch (e) {
assertEquals(-1, e.stack.indexOf('at new ReferenceError'));
threw = true;
}
assertTrue(threw);
}
// Test that the explicit constructor call is shown in the trace
function testUnintendedCallerCensorship() {
var threw = false;
try {
new ReferenceError({
toString: function () {
FAIL;
}
});
} catch (e) {
assertTrue(e.stack.indexOf('at new ReferenceError') != -1);
threw = true;
}
assertTrue(threw);
}
// If an error occurs while the stack trace is being formatted it should
// be handled gracefully.
function testErrorsDuringFormatting() {
function Nasty() { }
Nasty.prototype.foo = function () { throw new RangeError(); };
var n = new Nasty();
n.__defineGetter__('constructor', function () { CONS_FAIL; });
var threw = false;
try {
n.foo();
} catch (e) {
threw = true;
assertTrue(e.stack.indexOf('<error: ReferenceError') != -1);
}
assertTrue(threw);
threw = false;
// Now we can't even format the message saying that we couldn't format
// the stack frame. Put that in your pipe and smoke it!
ReferenceError.prototype.toString = function () { NESTED_FAIL; };
try {
n.foo();
} catch (e) {
threw = true;
assertTrue(e.stack.indexOf('<error>') != -1);
}
assertTrue(threw);
}
testTrace(testArrayNative, ["Array.map (native)"]);
testTrace(testNested, ["at one", "at two", "at three"]);
testTrace(testMethodNameInference, ["at Foo.bar"]);
testTrace(testImplicitConversion, ["at Nirk.valueOf"]);
testTrace(testEval, ["at Doo (eval at testEval"]);
testTrace(testNestedEval, ["eval at Inner (eval at Outer"]);
testTrace(testValue, ["at Number.causeError"]);
testTrace(testConstructor, ["new Plonk"]);
testTrace(testRenamedMethod, ["Wookie.a$b$c$d [as d]"]);
testTrace(testAnonymousMethod, ["Array.<anonymous>"]);
testTrace(testDefaultCustomError, ["hep-hey", "new CustomError"],
["collectStackTrace"]);
testTrace(testStrippedCustomError, ["hep-hey"], ["new CustomError",
"collectStackTrace"]);
testCallerCensorship();
testUnintendedCallerCensorship();
testErrorsDuringFormatting();