test262/implementation-contributed/v8/mjsunit/stack-traces-overflow.js

// Copyright 2012 the V8 project authors. All rights reserved.
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// modification, are permitted provided that the following conditions are
// met:
//
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// Flags: --stack-size=100

function overflow() {
  var a, b, c, d, e;  // Allocates some locals on the function's stack frame.
  overflow();
}
function rec1(a) { rec1(a+1); }
function rec2(a) { rec3(a+1); }
function rec3(a) { rec2(a+1); }

// Test stack trace has correct function location at top of the stack.
try {
  overflow();
} catch (e) {
  var first_frame = e.stack.split("\n")[1]
  // The overflow can happen when pushing the arguments (in interpreter) or when
  // the new function execution is starting. So the stack trace could either
  // point to start of the function (stack-traces-overflow.js30:18) or to the
  // location of call (stack-traces-overflow.js32:3).
  assertTrue((first_frame.indexOf("stack-traces-overflow.js:30:18") > 0) ||
             (first_frame.indexOf("stack-traces-overflow.js:32:3") > 0) );
}

// Test stack trace getter and setter.
try {
  rec1(0);
} catch (e) {
  assertTrue(e.stack.indexOf("rec1") > 0);
  e.stack = "123";
  assertEquals("123", e.stack);
}

// Test setter w/o calling the getter.
try {
  rec2(0);
} catch (e) {
  assertTrue(e.stack.indexOf("rec2") > 0);
  assertTrue(e.stack.indexOf("rec3") > 0);
  e.stack = "123";
  assertEquals("123", e.stack);
}

// Test getter to make sure setter does not affect the boilerplate.
try {
  rec1(0);
} catch (e) {
  assertTrue(e.stack.indexOf("rec1") > 0);
  assertInstanceof(e, RangeError);
}


// Check setting/getting stack property on the prototype chain.
function testErrorPrototype(prototype) {
  var object = {};
  object.__proto__ = prototype;
  object.stack = "123";  // Overwriting stack property succeeds.
  assertTrue(prototype.stack != object.stack);
  assertEquals("123", object.stack);
}

try {
  rec1(0);
} catch (e) {
  e.stack;
  testErrorPrototype(e);
}

try {
  rec1(0);
} catch (e) {
  testErrorPrototype(e);
}

try {
  throw new Error();
} catch (e) {
  testErrorPrototype(e);
}

Error.stackTraceLimit = 3;
try {
  rec1(0);
} catch (e) {
  assertEquals(4, e.stack.split('\n').length);
}

Error.stackTraceLimit = 25.9;
try {
  rec1(0);
} catch (e) {
  assertEquals(26, e.stack.split('\n').length);
}

Error.stackTraceLimit = NaN;
try {
  rec1(0);
} catch (e) {
  assertEquals(1, e.stack.split('\n').length);
}

// A limit outside the range of integers.
Error.stackTraceLimit = 1e12;
try {
  rec1(0);
} catch (e) {
  assertTrue(e.stack.split('\n').length > 100);
}

Error.stackTraceLimit = Infinity;
try {
  rec1(0);
} catch (e) {
  assertTrue(e.stack.split('\n').length > 100);
}

Error.stackTraceLimit = "not a number";
try {
  rec1(0);
} catch (e) {
  assertEquals(undefined, e.stack);
  e.stack = "abc";
  assertEquals("abc", e.stack);
}

Error.stackTraceLimit = 3;
Error = "";  // Overwrite Error in the global object.
try {
  rec1(0);
} catch (e) {
  assertEquals(4, e.stack.split('\n').length);
}