JDK-8006529.js revision 464:e4efb3ce97b2 
1/*
2 * Copyright (c) 2010, 2013, Oracle and/or its affiliates. All rights reserved.
3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
4 *
5 * This code is free software; you can redistribute it and/or modify it
6 * under the terms of the GNU General Public License version 2 only, as
7 * published by the Free Software Foundation.
8 *
9 * This code is distributed in the hope that it will be useful, but WITHOUT
10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
11 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
12 * version 2 for more details (a copy is included in the LICENSE file that
13 * accompanied this code).
14 *
15 * You should have received a copy of the GNU General Public License version
16 * 2 along with this work; if not, write to the Free Software Foundation,
17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
18 *
19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
20 * or visit www.oracle.com if you need additional information or have any
21 * questions.
22 */
23
24/**
25 * JDK-8006529 : Methods should not always get callee parameter, and they
26 * should not be too eager in creation of scopes.
27 *
28 * @test
29 * @run
30 */
31
32/*
33 * This test script depends on nashorn Compiler internals. It uses reflection
34 * to get access to private field and many public methods of Compiler and
35 * FunctionNode classes. Note that this is trusted code and access to such
36 * internal package classes and methods is okay. But, if you modify any
37 * Compiler or FunctionNode class, you may have to revisit this script.
38 * We cannot use direct Java class (via dynalink bean linker) to Compiler
39 * and FunctionNode because of package-access check and so reflective calls.
40 */
41
42var Parser              = Java.type("jdk.nashorn.internal.parser.Parser")
43var Compiler            = Java.type("jdk.nashorn.internal.codegen.Compiler")
44var Context             = Java.type("jdk.nashorn.internal.runtime.Context")
45var ScriptEnvironment   = Java.type("jdk.nashorn.internal.runtime.ScriptEnvironment")
46var Source              = Java.type("jdk.nashorn.internal.runtime.Source")
47var FunctionNode        = Java.type("jdk.nashorn.internal.ir.FunctionNode")
48var Block               = Java.type("jdk.nashorn.internal.ir.Block")
49var VarNode             = Java.type("jdk.nashorn.internal.ir.VarNode")
50var ExpressionStatement = Java.type("jdk.nashorn.internal.ir.ExpressionStatement")
51var UnaryNode           = Java.type("jdk.nashorn.internal.ir.UnaryNode")
52var BinaryNode          = Java.type("jdk.nashorn.internal.ir.BinaryNode")
53var ThrowErrorManager   = Java.type("jdk.nashorn.internal.runtime.Context$ThrowErrorManager")
54var ErrorManager        = Java.type("jdk.nashorn.internal.runtime.ErrorManager")
55var Debug               = Java.type("jdk.nashorn.internal.runtime.Debug")
56
57var parseMethod = Parser.class.getMethod("parse");
58var compileMethod = Compiler.class.getMethod("compile", FunctionNode.class);
59var getBodyMethod = FunctionNode.class.getMethod("getBody");
60var getStatementsMethod = Block.class.getMethod("getStatements");
61var getInitMethod = VarNode.class.getMethod("getInit");
62var getExpressionMethod = ExpressionStatement.class.getMethod("getExpression")
63var rhsMethod = UnaryNode.class.getMethod("rhs")
64var lhsMethod = BinaryNode.class.getMethod("lhs")
65var binaryRhsMethod = BinaryNode.class.getMethod("rhs")
66var debugIdMethod = Debug.class.getMethod("id", java.lang.Object.class)
67
68// These are method names of methods in FunctionNode class
69var allAssertionList = ['isVarArg', 'needsParentScope', 'needsCallee', 'hasScopeBlock', 'needsSelfSymbol', 'isSplit', 'hasEval', 'allVarsInScope', 'isStrict']
70
71// corresponding Method objects of FunctionNode class
72var functionNodeMethods = {};
73// initialize FunctionNode methods
74(function() {
75    for (var f in allAssertionList) {
76        var method = allAssertionList[f];
77        functionNodeMethods[method] = FunctionNode.class.getMethod(method);
78    }
79})();
80
81// returns functionNode.getBody().getStatements().get(0)
82function getFirstFunction(functionNode) {
83    var f = findFunction(getBodyMethod.invoke(functionNode))
84    if (f == null) {
85        throw new Error();
86    }
87    return f;
88}
89
90function findFunction(node) {
91    if(node instanceof Block) {
92        var stmts = getStatementsMethod.invoke(node)
93        for(var i = 0; i < stmts.size(); ++i) {
94            var retval = findFunction(stmts.get(i))
95            if(retval != null) {
96                return retval;
97            }
98        }
99    } else if(node instanceof VarNode) {
100        return findFunction(getInitMethod.invoke(node))
101    } else if(node instanceof UnaryNode) {
102        return findFunction(rhsMethod.invoke(node))
103    } else if(node instanceof BinaryNode) {
104        return findFunction(lhsMethod.invoke(node)) || findFunction(binaryRhsMethod.invoke(node))
105	} else if(node instanceof ExpressionStatement) {
106		return findFunction(getExpressionMethod.invoke(node))
107    } else if(node instanceof FunctionNode) {
108        return node
109    }
110}
111
112var getContextMethod = Context.class.getMethod("getContext")
113var getEnvMethod = Context.class.getMethod("getEnv")
114
115var SourceConstructor = Source.class.getConstructor(java.lang.String.class, java.lang.String.class)
116var ParserConstructor = Parser.class.getConstructor(ScriptEnvironment.class, Source.class, ErrorManager.class)
117var CompilerConstructor = Compiler.class.getConstructor(ScriptEnvironment.class)
118
119// compile(script) -- compiles a script specified as a string with its
120// source code, returns a jdk.nashorn.internal.ir.FunctionNode object
121// representing it.
122function compile(source) {
123    var source = SourceConstructor.newInstance("<no name>", source);
124
125    var env = getEnvMethod.invoke(getContextMethod.invoke(null))
126
127    var parser   = ParserConstructor.newInstance(env, source, ThrowErrorManager.class.newInstance());
128    var func     = parseMethod.invoke(parser);
129
130    var compiler = CompilerConstructor.newInstance(env);
131
132    return compileMethod.invoke(compiler, func);
133};
134
135var allAssertions = (function() {
136    var allAssertions = {}
137    for(var assertion in allAssertionList) {
138        allAssertions[allAssertionList[assertion]] = true
139    }
140    return allAssertions;
141})();
142
143
144// test(f[, assertions...]) tests whether all the specified assertions on the
145// passed function node are true.
146function test(f) {
147    var assertions = {}
148    for(var i = 1; i < arguments.length; ++i) {
149        var assertion = arguments[i]
150        if(!allAssertions[assertion]) {
151            throw "Unknown assertion " + assertion + " for " + f;
152        }
153        assertions[assertion] = true
154    }
155    for(var assertion in allAssertions) {
156        var expectedValue = !!assertions[assertion]
157        var actualValue = functionNodeMethods[assertion].invoke(f)
158        if(actualValue !== expectedValue) {
159            throw "Expected " + assertion + " === " + expectedValue + ", got " + actualValue + " for " + f + ":" + debugIdMethod.invoke(null, f);
160        }
161    }
162}
163
164// testFirstFn(script[, assertions...] tests whether all the specified
165// assertions are true in the first function in the given script; "script"
166// is a string with the source text of the script.
167function testFirstFn(script) {
168    arguments[0] = getFirstFunction(compile(script))
169    test.apply(null, arguments)
170}
171
172// ---------------------------------- ACTUAL TESTS START HERE --------------
173
174// The simplest possible functions have no attributes set
175testFirstFn("function f() { }")
176testFirstFn("function f(x) { x }")
177
178// A function referencing a global needs parent scope, and it needs callee
179// (because parent scope is passed through callee)
180testFirstFn("function f() { x }", 'needsCallee', 'needsParentScope')
181
182// A function referencing "arguments" will have to be vararg. It also needs
183// the callee, as it needs to fill out "arguments.callee".
184testFirstFn("function f() { arguments }", 'needsCallee', 'isVarArg')
185
186// A function referencing "arguments" will have to be vararg. If it is
187// strict, it will not have to have a callee, though.
188testFirstFn("function f() {'use strict'; arguments }", 'isVarArg', 'isStrict')
189
190// A function defining "arguments" as a parameter will not be vararg.
191testFirstFn("function f(arguments) { arguments }")
192
193// A function defining "arguments" as a nested function will not be vararg.
194testFirstFn("function f() { function arguments() {}; arguments; }")
195
196// A function defining "arguments" as a local variable will be vararg.
197testFirstFn("function f() { var arguments; arguments; }", 'isVarArg', 'needsCallee')
198
199// A self-referencing function defined as a statement doesn't need a self
200// symbol, as it'll rather obtain itself from the parent scope.
201testFirstFn("function f() { f() }", 'needsCallee', 'needsParentScope')
202
203// A self-referencing function defined as an expression needs a self symbol,
204// as it can't obtain itself from the parent scope.
205testFirstFn("(function f() { f() })", 'needsCallee', 'needsSelfSymbol')
206
207// A child function accessing parent's variable triggers the need for scope
208// in parent
209testFirstFn("(function f() { var x; function g() { x } })", 'hasScopeBlock')
210
211// A child function accessing parent's parameter triggers the need for scope
212// in parent
213testFirstFn("(function f(x) { function g() { x } })", 'hasScopeBlock')
214
215// A child function accessing a global variable triggers the need for parent
216// scope in parent
217testFirstFn("(function f() { function g() { x } })", 'needsParentScope', 'needsCallee')
218
219// A child function redefining a local variable from its parent should not
220// affect the parent function in any way
221testFirstFn("(function f() { var x; function g() { var x; x } })")
222
223// Using "with" on its own doesn't do much.
224testFirstFn("(function f() { var o; with(o) {} })")
225
226// "with" referencing a local variable triggers scoping.
227testFirstFn("(function f() { var x; var y; with(x) { y } })", 'hasScopeBlock')
228
229// "with" referencing a non-local variable triggers parent scope.
230testFirstFn("(function f() { var x; with(x) { y } })", 'needsCallee', 'needsParentScope')
231
232// Nested function using "with" is pretty much the same as the parent
233// function needing with.
234testFirstFn("(function f() { function g() { var o; with(o) {} } })")
235
236// Nested function using "with" referencing a local variable.
237testFirstFn("(function f() { var x; function g() { var o; with(o) { x } } })", 'hasScopeBlock')
238
239// Using "eval" triggers pretty much everything. The function even needs to be
240// vararg, 'cause we don't know if eval will be using "arguments".
241testFirstFn("(function f() { eval() })", 'needsParentScope', 'needsCallee', 'hasScopeBlock', 'hasEval', 'isVarArg', 'allVarsInScope')
242
243// Nested function using "eval" is almost the same as parent function using
244// eval, but at least the parent doesn't have to be vararg.
245testFirstFn("(function f() { function g() { eval() } })", 'needsParentScope', 'needsCallee', 'hasScopeBlock', 'allVarsInScope')
246
247// Function with 250 named parameters is ordinary
248testFirstFn("function f(p1, p2, p3, p4, p5, p6, p7, p8, p9, p10, p11, p12, p13, p14, p15, p16, p17, p18, p19, p20, p21, p22, p23, p24, p25, p26, p27, p28, p29, p30, p31, p32, p33, p34, p35, p36, p37, p38, p39, p40, p41, p42, p43, p44, p45, p46, p47, p48, p49, p50, p51, p52, p53, p54, p55, p56, p57, p58, p59, p60, p61, p62, p63, p64, p65, p66, p67, p68, p69, p70, p71, p72, p73, p74, p75, p76, p77, p78, p79, p80, p81, p82, p83, p84, p85, p86, p87, p88, p89, p90, p91, p92, p93, p94, p95, p96, p97, p98, p99, p100, p101, p102, p103, p104, p105, p106, p107, p108, p109, p110, p111, p112, p113, p114, p115, p116, p117, p118, p119, p120, p121, p122, p123, p124, p125, p126, p127, p128, p129, p130, p131, p132, p133, p134, p135, p136, p137, p138, p139, p140, p141, p142, p143, p144, p145, p146, p147, p148, p149, p150, p151, p152, p153, p154, p155, p156, p157, p158, p159, p160, p161, p162, p163, p164, p165, p166, p167, p168, p169, p170, p171, p172, p173, p174, p175, p176, p177, p178, p179, p180, p181, p182, p183, p184, p185, p186, p187, p188, p189, p190, p191, p192, p193, p194, p195, p196, p197, p198, p199, p200, p201, p202, p203, p204, p205, p206, p207, p208, p209, p210, p211, p212, p213, p214, p215, p216, p217, p218, p219, p220, p221, p222, p223, p224, p225, p226, p227, p228, p229, p230, p231, p232, p233, p234, p235, p236, p237, p238, p239, p240, p241, p242, p243, p244, p245, p246, p247, p248, p249, p250) { p250 = p249 }")
249
250// Function with 251 named parameters is variable arguments
251testFirstFn("function f(p1, p2, p3, p4, p5, p6, p7, p8, p9, p10, p11, p12, p13, p14, p15, p16, p17, p18, p19, p20, p21, p22, p23, p24, p25, p26, p27, p28, p29, p30, p31, p32, p33, p34, p35, p36, p37, p38, p39, p40, p41, p42, p43, p44, p45, p46, p47, p48, p49, p50, p51, p52, p53, p54, p55, p56, p57, p58, p59, p60, p61, p62, p63, p64, p65, p66, p67, p68, p69, p70, p71, p72, p73, p74, p75, p76, p77, p78, p79, p80, p81, p82, p83, p84, p85, p86, p87, p88, p89, p90, p91, p92, p93, p94, p95, p96, p97, p98, p99, p100, p101, p102, p103, p104, p105, p106, p107, p108, p109, p110, p111, p112, p113, p114, p115, p116, p117, p118, p119, p120, p121, p122, p123, p124, p125, p126, p127, p128, p129, p130, p131, p132, p133, p134, p135, p136, p137, p138, p139, p140, p141, p142, p143, p144, p145, p146, p147, p148, p149, p150, p151, p152, p153, p154, p155, p156, p157, p158, p159, p160, p161, p162, p163, p164, p165, p166, p167, p168, p169, p170, p171, p172, p173, p174, p175, p176, p177, p178, p179, p180, p181, p182, p183, p184, p185, p186, p187, p188, p189, p190, p191, p192, p193, p194, p195, p196, p197, p198, p199, p200, p201, p202, p203, p204, p205, p206, p207, p208, p209, p210, p211, p212, p213, p214, p215, p216, p217, p218, p219, p220, p221, p222, p223, p224, p225, p226, p227, p228, p229, p230, p231, p232, p233, p234, p235, p236, p237, p238, p239, p240, p241, p242, p243, p244, p245, p246, p247, p248, p249, p250, p251) { p250 = p251 }", 'isVarArg')
252