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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.
// Return the stack frames of an Error object.
Error.prototype.getFrames = function() {
Error.prepareStackTrace = function(error, frames) {
return frames;
}
var frames = this.stack;
Error.prepareStackTrace = undefined;
return frames;
}
String.prototype.contains = function(pattern) {
return this.indexOf(pattern) > -1;
}
// Check for every frame that a certain method returns the
// expected value for every frame.
Array.prototype.verifyEquals = function(frames, func_name) {
this.forEach(
function(element, index) {
var frame = frames[index];
if (element === null) return;
assertEquals(element, (frame[func_name])());
}
);
}
// Check for every frame that a certain method has a return value
// that contains the expected pattern for every frame.
Array.prototype.verifyContains = function(frames, func_name) {
this.forEach(
function(element, index) {
var frame = frames[index];
if (element === null) return;
assertTrue((frame[func_name])().contains(element));
}
);
}
// Check for every frame that a certain method returns undefined
// when expected.
Array.prototype.verifyUndefined = function(frames, func_name) {
this.forEach(
function(element, index) {
var frame = frames[index];
if (element === null) return;
assertEquals(element, (frame[func_name])() === undefined);
}
);
}
// Simple eval.
var code1 = "function f() { \n" +
" throw new Error(3); \n" + // Line 2
"} \n" +
"f(); \n"; // Line 4
function g() {
eval(code1);
}
try {
g();
} catch (e) {
// We expect something like
// f (eval at g (eval-stack.js:87:8), <anonymous>:2:9)
// eval (eval at g (eval-stack.js:87:8), <anonymous>:4:1)
// g (eval-stack.js:87:3)
// eval-stack.js:94:3
var frames = e.getFrames();
assertEquals(4, frames.length);
["f", "eval", "g"]
.verifyEquals(frames, "getFunctionName");
[2, 4]
.verifyEquals(frames, "getLineNumber");
["<anonymous>:2:", "<anonymous>:4:"]
.verifyContains(frames, "toString");
[true, true, false, false]
.verifyUndefined(frames, "getFileName");
["eval at g", "eval at g"]
.verifyContains(frames, "getEvalOrigin");
}
// Nested eval.
var code2 = "function h() { \n" +
" // Empty \n" +
" eval(code1); \n" + // Line 3
"} \n" +
"h(); \n"; // Line 5
try {
eval(code2);
} catch (e) {
// We expect something like
// f (eval at h (eval at <anonymous> (eval-stack.js:116:8)),
// <anonymous>:2:9)
// eval (eval at h (eval at <anonymous> (eval-stack.js:116:8)),
// <anonymous>:4:1)
// h (eval at <anonymous> (eval-stack.js:116:8), <anonymous>:3:3)
// eval (eval at <anonymous> (eval-stack.js:116:8), <anonymous>:5:1)
// eval-stack.js:116:3
var frames = e.getFrames();
assertEquals(5, frames.length);
["f", "eval", "h", "eval"]
.verifyEquals(frames, "getFunctionName");
[2, 4, 3, 5]
.verifyEquals(frames, "getLineNumber");
["<anonymous>:2:", "<anonymous>:4:", "<anonymous>:3:", "<anonymous>:5:"]
.verifyContains(frames, "toString");
[true, true, true, true, false]
.verifyUndefined(frames, "getFileName");
["eval at h (eval at <anonymous> (",
"eval at h (eval at <anonymous> (",
"eval at <anonymous> (",
"eval at <anonymous> ("]
.verifyContains(frames, "getEvalOrigin");
}
// Nested eval calling through non-eval defined function.
var code3 = "function h() { \n" +
" // Empty \n" +
" g(); \n" + // Line 3
"} \n" +
"h(); \n"; // Line 5
try {
eval(code3);
} catch (e) {
// We expect something like
// f (eval at g (test.js:83:8), <anonymous>:2:9)
// eval (eval at g (test.js:83:8), <anonymous>:4:1)
// g (test.js:83:3)
// h (eval at <anonymous> (test.js:149:8), <anonymous>:3:3)
// eval (eval at <anonymous> (test.js:149:8), <anonymous>:5:1)
// test.js:149:3
var frames = e.getFrames();
assertEquals(6, frames.length);
["f", "eval", "g", "h", "eval"]
.verifyEquals(frames, "getFunctionName");
[2, 4, null, 3, 5]
.verifyEquals(frames, "getLineNumber");
["<anonymous>:2:", "<anonymous>:4:", null, "<anonymous>:3:", "<anonymous>:5:"]
.verifyContains(frames, "toString");
[true, true, false, true, true, false]
.verifyUndefined(frames, "getFileName");
["eval at g (",
"eval at g (",
null,
"eval at <anonymous> (",
"eval at <anonymous> ("]
.verifyContains(frames, "getEvalOrigin");
}
// Calling function defined in eval.
eval("function f() { \n" +
" throw new Error(3); \n" +
"} \n");
try {
f();
} catch (e) {
// We expect something like
// f (eval at <anonymous> (test.js:182:40), <anonymous>:2:9)
// test.js:186:3
var frames = e.getFrames();
assertEquals(2, frames.length);
["f"].verifyEquals(frames, "getFunctionName");
[2].verifyEquals(frames, "getLineNumber");
["<anonymous>:2:"].verifyContains(frames, "toString");
[true, false].verifyUndefined(frames, "getFileName");
["eval at <anonymous> ("].verifyContains(frames, "getEvalOrigin");
}