| // Copyright 2016 the V8 project authors. All rights reserved. |
| // Use of this source code is governed by a BSD-style license that can be |
| // found in the LICENSE file. |
| |
| // Flags: --allow-natives-syntax --harmony-tailcalls --harmony-proxies |
| "use strict"; |
| |
| Error.prepareStackTrace = (e,s) => s; |
| |
| function CheckStackTrace(expected) { |
| var stack = (new Error()).stack; |
| assertEquals("CheckStackTrace", stack[0].getFunctionName()); |
| for (var i = 0; i < expected.length; i++) { |
| assertEquals(expected[i].name, stack[i + 1].getFunctionName()); |
| } |
| } |
| |
| |
| // Tail call proxy function when caller does not have an arguments |
| // adaptor frame. |
| (function test() { |
| // Caller and callee have same number of arguments. |
| function f1(a) { |
| CheckStackTrace([f1, test]); |
| return 10 + a; |
| } |
| var p1 = new Proxy(f1, {}); |
| function g1(a) { return p1(2); } |
| assertEquals(12, g1(1)); |
| |
| // Caller has more arguments than callee. |
| function f2(a) { |
| CheckStackTrace([f2, test]); |
| return 10 + a; |
| } |
| var p2 = new Proxy(f2, {}); |
| function g2(a, b, c) { return p2(2); } |
| assertEquals(12, g2(1, 2, 3)); |
| |
| // Caller has less arguments than callee. |
| function f3(a, b, c) { |
| CheckStackTrace([f3, test]); |
| return 10 + a + b + c; |
| } |
| var p3 = new Proxy(f3, {}); |
| function g3(a) { return p3(2, 3, 4); } |
| assertEquals(19, g3(1)); |
| |
| // Callee has arguments adaptor frame. |
| function f4(a, b, c) { |
| CheckStackTrace([f4, test]); |
| return 10 + a; |
| } |
| var p4 = new Proxy(f4, {}); |
| function g4(a) { return p4(2); } |
| assertEquals(12, g4(1)); |
| })(); |
| |
| |
| // Tail call proxy function when caller has an arguments adaptor frame. |
| (function test() { |
| // Caller and callee have same number of arguments. |
| function f1(a) { |
| CheckStackTrace([f1, test]); |
| return 10 + a; |
| } |
| var p1 = new Proxy(f1, {}); |
| function g1(a) { return p1(2); } |
| assertEquals(12, g1()); |
| |
| // Caller has more arguments than callee. |
| function f2(a) { |
| CheckStackTrace([f2, test]); |
| return 10 + a; |
| } |
| var p2 = new Proxy(f2, {}); |
| function g2(a, b, c) { return p2(2); } |
| assertEquals(12, g2()); |
| |
| // Caller has less arguments than callee. |
| function f3(a, b, c) { |
| CheckStackTrace([f3, test]); |
| return 10 + a + b + c; |
| } |
| var p3 = new Proxy(f3, {}); |
| function g3(a) { return p3(2, 3, 4); } |
| assertEquals(19, g3()); |
| |
| // Callee has arguments adaptor frame. |
| function f4(a, b, c) { |
| CheckStackTrace([f4, test]); |
| return 10 + a; |
| } |
| var p4 = new Proxy(f4, {}); |
| function g4(a) { return p4(2); } |
| assertEquals(12, g4()); |
| })(); |