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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.
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 testEvalWithSourceURL() {
eval("function Doo() { FAIL; }; Doo();\n//# sourceURL=res://name");
}
function testNestedEvalWithSourceURL() {
var x = "FAIL";
var innerEval = 'function Inner() { eval(x); }\n//@ sourceURL=res://inner-eval';
eval("function Outer() { eval(innerEval); Inner(); }; Outer();\n//# sourceURL=res://outer-eval");
}
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 testFunctionName() {
function gen(name, counter) {
var f = function foo() {
if (counter === 0) {
FAIL;
}
gen(name, counter - 1)();
}
if (counter === 4) {
Object.defineProperty(f, 'name', {get: function(){ throw 239; }});
} else if (counter == 3) {
Object.defineProperty(f, 'name', {value: 'boo' + '_' + counter});
} else {
Object.defineProperty(f, 'name', {writable: true});
if (counter === 2)
f.name = 42;
else
f.name = name + '_' + counter;
}
return f;
}
gen('foo', 4)();
}
function testFunctionInferredName() {
var f = function() {
FAIL;
}
f();
}
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);
}
MyObj = function() { FAIL; }
MyObjCreator = function() {}
MyObjCreator.prototype.Create = function() {
return new MyObj();
}
function testClassNames() {
(new MyObjCreator).Create();
}
// Utility function for testing that the expected strings occur
// in the stack trace produced when running the given function.
function testTrace(name, 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,
name + " doesn't contain expected[" + i + "] stack = " + e.stack);
}
if (unexpected) {
for (var i = 0; i < unexpected.length; i++) {
assertEquals(e.stack.indexOf(unexpected[i]), -1,
name + " contains unexpected[" + i + "]");
}
}
threw = true;
}
assertTrue(threw, name + " didn't throw");
}
// 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'),
"CallerCensorship contained new ReferenceError");
threw = true;
}
assertTrue(threw, "CallerCensorship didn't throw");
}
// 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,
"UnintendedCallerCensorship didn't contain new ReferenceError");
threw = true;
}
assertTrue(threw, "UnintendedCallerCensorship didn't throw");
}
// 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; });
assertThrows(()=>n.foo(), RangeError);
// 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; };
assertThrows(()=>n.foo(), RangeError);
}
// Poisonous object that throws a reference error if attempted converted to
// a primitive values.
var thrower = { valueOf: function() { FAIL; },
toString: function() { FAIL; } };
// Tests that a native constructor function is included in the
// stack trace.
function testTraceNativeConstructor(nativeFunc) {
var nativeFuncName = nativeFunc.name;
try {
new nativeFunc(thrower);
assertUnreachable(nativeFuncName);
} catch (e) {
assertTrue(e.stack.indexOf(nativeFuncName) >= 0, nativeFuncName);
}
}
// Tests that a native conversion function is included in the
// stack trace.
function testTraceNativeConversion(nativeFunc) {
var nativeFuncName = nativeFunc.name;
try {
nativeFunc(thrower);
assertUnreachable(nativeFuncName);
} catch (e) {
assertTrue(e.stack.indexOf(nativeFuncName) >= 0, nativeFuncName);
}
}
function testOmittedBuiltin(throwing, omitted) {
var reached = false;
try {
throwing();
reached = true;
} catch (e) {
assertTrue(e.stack.indexOf(omitted) < 0, omitted);
} finally {
assertFalse(reached);
}
}
testTrace("testArrayNative", testArrayNative, ["Array.map"]);
testTrace("testNested", testNested, ["at one", "at two", "at three"]);
testTrace("testMethodNameInference", testMethodNameInference, ["at Foo.bar"]);
testTrace("testImplicitConversion", testImplicitConversion, ["at Nirk.valueOf"]);
testTrace("testEval", testEval, ["at Doo (eval at testEval"]);
testTrace("testNestedEval", testNestedEval, ["eval at Inner (eval at Outer"]);
testTrace("testEvalWithSourceURL", testEvalWithSourceURL,
[ "at Doo (res://name:1:18)" ]);
testTrace("testNestedEvalWithSourceURL", testNestedEvalWithSourceURL,
[" at Inner (res://inner-eval:1:20)",
" at Outer (res://outer-eval:1:37)"]);
testTrace("testValue", testValue, ["at Number.causeError"]);
testTrace("testConstructor", testConstructor, ["new Plonk"]);
testTrace("testRenamedMethod", testRenamedMethod, ["Wookie.a$b$c$d [as d]"]);
testTrace("testAnonymousMethod", testAnonymousMethod, ["Array.<anonymous>"]);
testTrace("testFunctionName", testFunctionName,
[" at foo_0 ", " at foo_1", " at foo ", " at boo_3 ", " at foo "]);
testTrace("testFunctionInferredName", testFunctionInferredName, [" at f "]);
testTrace("testDefaultCustomError", testDefaultCustomError,
["hep-hey", "new CustomError"],
["collectStackTrace"]);
testTrace("testStrippedCustomError", testStrippedCustomError, ["hep-hey"],
["new CustomError", "collectStackTrace"]);
testTrace("testClassNames", testClassNames,
["new MyObj", "MyObjCreator.Create"], ["as Create"]);
testCallerCensorship();
testUnintendedCallerCensorship();
testErrorsDuringFormatting();
testTraceNativeConversion(String); // Does ToString on argument.
testTraceNativeConversion(RegExp); // Does ToString on argument.
testTraceNativeConstructor(String); // Does ToString on argument.
testTraceNativeConstructor(RegExp); // Does ToString on argument.
// Omitted because QuickSort has builtins object as receiver, and is non-native
// builtin.
testOmittedBuiltin(function(){ [thrower, 2].sort(function (a,b) {
(b < a) - (a < b); });
}, "QuickSort");
var reached = false;
var error = new Error();
error.toString = function() { reached = true; };
error.stack;
assertFalse(reached);
reached = false;
error = new Error();
Array.prototype.push = function(x) { reached = true; };
Array.prototype.join = function(x) { reached = true; };
error.stack;
assertFalse(reached);
var fired = false;
error = new Error({ toString: function() { fired = true; } });
assertTrue(fired);
error.stack;
assertTrue(fired);
// Check that throwing exception in a custom stack trace formatting function
// does not lead to recursion.
Error.prepareStackTrace = function() { throw new Error("abc"); };
var message;
try {
try {
throw new Error();
} catch (e) {
e.stack;
}
} catch (e) {
message = e.message;
}
assertEquals("abc", message);
// Test that modifying Error.prepareStackTrace by itself works.
Error.prepareStackTrace = function() { Error.prepareStackTrace = "custom"; };
new Error().stack;
assertEquals("custom", Error.prepareStackTrace);
// Check that the formatted stack trace can be set to undefined.
error = new Error();
error.stack = undefined;
assertEquals(undefined, error.stack);
// Check that the stack trace accessors are not forcibly set.
var my_error = {};
Object.freeze(my_error);
assertThrows(function() { Error.captureStackTrace(my_error); });
my_error = {};
Object.preventExtensions(my_error);
assertThrows(function() { Error.captureStackTrace(my_error); });
var fake_error = {};
my_error = new Error();
var stolen_getter = Object.getOwnPropertyDescriptor(my_error, 'stack').get;
Object.defineProperty(fake_error, 'stack', { get: stolen_getter });
assertEquals(undefined, fake_error.stack);
// Check that overwriting the stack property during stack trace formatting
// does not crash.
error = new Error("foobar");
error.__defineGetter__("name", function() { error.stack = "abc"; });
assertTrue(error.stack.startsWith("Error"));
assertTrue(error.stack.includes("foobar"));
error = new Error("foobar");
error.__defineGetter__("name", function() { delete error.stack; });
// The first time, Error.stack returns the formatted stack trace,
// not the content of the property.
assertTrue(error.stack.startsWith("Error"));
assertEquals(error.stack, undefined);
// Check that repeated trace collection does not crash.
error = new Error();
Error.captureStackTrace(error);
// Check property descriptor.
var o = {};
Error.captureStackTrace(o);
assertEquals([], Object.keys(o));
var desc = Object.getOwnPropertyDescriptor(o, "stack");
assertFalse(desc.enumerable);
assertTrue(desc.configurable);
assertTrue(desc.writable);
// Check that exceptions thrown within prepareStackTrace throws an exception.
Error.prepareStackTrace = function(e, frames) { throw 42; }
assertThrows(() => new Error().stack);
// Check that we don't crash when CaptureSimpleStackTrace returns undefined.
var o = {};
var oldStackTraceLimit = Error.stackTraceLimit;
Error.stackTraceLimit = "not a number";
Error.captureStackTrace(o);
Error.stackTraceLimit = oldStackTraceLimit;
// Check that we don't crash when a callsite's function's script is empty.
Error.prepareStackTrace = function(e, frames) {
assertEquals(undefined, frames[0].getEvalOrigin());
}
try {
DataView();
assertUnreachable();
} catch (e) {
assertEquals(undefined, e.stack);
}
// Check that a tight recursion in prepareStackTrace throws when accessing
// stack. Trying again without a custom formatting function formats correctly.
var err = new Error("abc");
Error.prepareStackTrace = () => Error.prepareStackTrace();
try {
err.stack;
assertUnreachable();
} catch (e) {
err = e;
}
Error.prepareStackTrace = undefined;
assertTrue(
err.stack.indexOf("RangeError: Maximum call stack size exceeded") != -1);
assertTrue(err.stack.indexOf("prepareStackTrace") != -1);
// Check that the callsite constructor throws.
Error.prepareStackTrace = (e,s) => s;
var constructor = new Error().stack[0].constructor;
assertThrows(() => constructor.call());
assertThrows(() => constructor.call(
null, {}, () => undefined, {valueOf() { return 0 }}, false));