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Edit File: debug-function-scopes.js
// 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. // Flags: --expose-debug-as debug --harmony-scoping "use strict"; // Get the Debug object exposed from the debug context global object. var Debug = debug.Debug; function CheckScope(scope_mirror, scope_expectations, expected_scope_type) { assertEquals(expected_scope_type, scope_mirror.scopeType()); var scope_object = scope_mirror.scopeObject().value(); for (let name in scope_expectations) { let actual = scope_object[name]; let expected = scope_expectations[name]; assertEquals(expected, actual); } } // A copy of the scope types from mirror-debugger.js. var ScopeType = { Global: 0, Local: 1, With: 2, Closure: 3, Catch: 4, Block: 5 }; var f1 = (function F1(x) { function F2(y) { var z = x + y; { var w = 5; var v = "Capybara"; var F3 = function(a, b) { function F4(p) { return p + a + b + z + w + v.length; } return F4; } return F3(4, 5); } } return F2(17); })(5); var mirror = Debug.MakeMirror(f1); assertEquals(4, mirror.scopeCount()); CheckScope(mirror.scope(0), { a: 4, b: 5 }, ScopeType.Closure); CheckScope(mirror.scope(1), { z: 22, w: 5, v: "Capybara" }, ScopeType.Closure); CheckScope(mirror.scope(2), { x: 5 }, ScopeType.Closure); CheckScope(mirror.scope(3), {}, ScopeType.Global); var f2 = (function() { var v1 = 3; var v2 = 4; let l0 = 0; { var v3 = 5; let l1 = 6; let l2 = 7; { var v4 = 8; let l3 = 9; { var v5 = "Cat"; let l4 = 11; var v6 = l4; return function() { return l0 + v1 + v3 + l2 + l3 + v6; }; } } } })(); var mirror = Debug.MakeMirror(f2); assertEquals(5, mirror.scopeCount()); // Implementation artifact: l4 isn't used in closure, but still it is saved. CheckScope(mirror.scope(0), { l4: 11 }, ScopeType.Block); CheckScope(mirror.scope(1), { l3: 9 }, ScopeType.Block); CheckScope(mirror.scope(2), { l1: 6, l2: 7 }, ScopeType.Block); CheckScope(mirror.scope(3), { v1:3, l0: 0, v3: 5, v6: 11 }, ScopeType.Closure); CheckScope(mirror.scope(4), {}, ScopeType.Global);