JDK-8006529.js revision 88:43e32b36153c 
1/*
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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
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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 Source         = Java.type("jdk.nashorn.internal.runtime.Source")
46var FunctionNode   = Java.type("jdk.nashorn.internal.ir.FunctionNode")
47
48// Compiler class methods and fields
49var parseMethod = Parser.class.getMethod("parse");
50var compileMethod = Compiler.class.getMethod("compile");
51
52// NOTE: private field. But this is a trusted test!
53// Compiler.functionNode
54var functionNodeField = Compiler.class.getDeclaredField("functionNode");
55functionNodeField.setAccessible(true);
56
57// FunctionNode methods
58
59// FunctionNode.getFunctions method
60var getFunctionsMethod = FunctionNode.class.getMethod("getFunctions");
61
62// These are method names of methods in FunctionNode class
63var allAssertionList = ['isVarArg', 'needsParentScope', 'needsCallee', 'needsScope', 'needsSelfSymbol', 'isSplit', 'hasEval', 'hasWith', 'hasDeepWithOrEval', 'varsInScope', 'isStrictMode']
64
65// corresponding Method objects of FunctionNode class
66var functionNodeMethods = {};
67// initialize FunctionNode methods
68(function() {
69    for (var f in allAssertionList) {
70        var method = allAssertionList[f];
71        functionNodeMethods[method] = FunctionNode.class.getMethod(method);
72    }
73})();
74
75// returns "script" functionNode from Compiler instance
76function getScriptNode(compiler) {
77    // compiler.functionNode
78    return functionNodeField.get(compiler);
79}
80
81// returns functionNode.getFunctions().get(0)
82function getFirstFunction(functionNode) {
83    // functionNode.getFunctions().get(0)
84    return getFunctionsMethod.invoke(functionNode).get(0);
85}
86
87// compile(script) -- compiles a script specified as a string with its
88// source code, returns a jdk.nashorn.internal.ir.FunctionNode object
89// representing it.
90function compile(source) {
91    var source   = new Source("<no name>", source);
92    var parser   = new Parser(Context.getContext(), source, null);
93    var func     = parseMethod.invoke(parser);
94    var compiler = new Compiler(Context.getContext(), func);
95
96    compileMethod.invoke(compiler);
97
98    return getScriptNode(compiler);
99};
100
101var allAssertions = (function() {
102    var allAssertions = {}
103    for(var assertion in allAssertionList) {
104        allAssertions[allAssertionList[assertion]] = true
105    }
106    return allAssertions;
107})();
108
109
110// test(f[, assertions...]) tests whether all the specified assertions on the
111// passed function node are true.
112function test(f) {
113    var assertions = {}
114    for(var i = 1; i < arguments.length; ++i) {
115        var assertion = arguments[i]
116        if(!allAssertions[assertion]) {
117            throw "Unknown assertion " + assertion + " for " + f;
118        }
119        assertions[assertion] = true
120    }
121    for(var assertion in allAssertions) {
122        var expectedValue = !!assertions[assertion]
123        if(functionNodeMethods[assertion].invoke(f) !== expectedValue) {
124            throw "Expected " + assertion + " === " + expectedValue + " for " + f;
125        }
126    }
127}
128
129// testFirstFn(script[, assertions...] tests whether all the specified
130// assertions are true in the first function in the given script; "script"
131// is a string with the source text of the script.
132function testFirstFn(script) {
133    arguments[0] = getFirstFunction(compile(script))
134    test.apply(null, arguments)
135}
136
137// ---------------------------------- ACTUAL TESTS START HERE --------------
138
139// The simplest possible functions have no attributes set
140testFirstFn("function f() { }")
141testFirstFn("function f(x) { x }")
142
143// A function referencing a global needs parent scope, and it needs callee
144// (because parent scope is passed through callee)
145testFirstFn("function f() { x }", 'needsCallee', 'needsParentScope')
146
147// A function referencing "arguments" will have to be vararg. It also needs
148// the callee, as it needs to fill out "arguments.callee".
149testFirstFn("function f() { arguments }", 'needsCallee', 'isVarArg')
150
151// A function referencing "arguments" will have to be vararg. If it is
152// strict, it will not have to have a callee, though.
153testFirstFn("function f() {'use strict'; arguments }", 'isVarArg', 'isStrictMode')
154
155// A function defining "arguments" as a parameter will not be vararg.
156testFirstFn("function f(arguments) { arguments }")
157
158// A function defining "arguments" as a nested function will not be vararg.
159testFirstFn("function f() { function arguments() {}; arguments; }")
160
161// A function defining "arguments" as a local variable will be vararg.
162testFirstFn("function f() { var arguments; arguments; }", 'isVarArg', 'needsCallee')
163
164// A self-referencing function defined as a statement doesn't need a self
165// symbol, as it'll rather obtain itself from the parent scope.
166testFirstFn("function f() { f() }", 'needsCallee', 'needsParentScope')
167
168// A self-referencing function defined as an expression needs a self symbol,
169// as it can't obtain itself from the parent scope.
170testFirstFn("(function f() { f() })", 'needsCallee', 'needsSelfSymbol')
171
172// A child function accessing parent's variable triggers the need for scope
173// in parent
174testFirstFn("(function f() { var x; function g() { x } })", 'needsScope')
175
176// A child function accessing parent's parameter triggers the need for scope
177// in parent
178testFirstFn("(function f(x) { function g() { x } })", 'needsScope')
179
180// A child function accessing a global variable triggers the need for parent
181// scope in parent
182testFirstFn("(function f() { function g() { x } })", 'needsParentScope', 'needsCallee')
183
184// A child function redefining a local variable from its parent should not
185// affect the parent function in any way
186testFirstFn("(function f() { var x; function g() { var x; x } })")
187
188// Using "with" unleashes a lot of needs: parent scope, callee, own scope,
189// and all variables in scope. Actually, we could make "with" less wasteful,
190// and only put those variables in scope that it actually references, similar
191// to what nested functions do with variables in their parents.
192testFirstFn("(function f() { var o; with(o) {} })", 'needsParentScope', 'needsCallee', 'needsScope', 'hasWith', 'hasDeepWithOrEval', 'varsInScope')
193
194// Using "eval" is as bad as using "with" with the added requirement of
195// being vararg, 'cause we don't know if eval will be using "arguments".
196testFirstFn("(function f() { eval() })", 'needsParentScope', 'needsCallee', 'needsScope', 'hasEval', 'isVarArg', 'hasDeepWithOrEval', 'varsInScope')
197
198// Nested function using "with" is pretty much the same as the parent
199// function needing with.
200testFirstFn("(function f() { function g() { var o; with(o) {} } })", 'needsParentScope', 'needsCallee', 'needsScope', 'hasDeepWithOrEval', 'varsInScope')
201// Nested function using "eval" is almost the same as parent function using
202// eval, but at least the parent doesn't have to be vararg.
203testFirstFn("(function f() { function g() { eval() } })", 'needsParentScope', 'needsCallee', 'needsScope', 'hasDeepWithOrEval', 'varsInScope')
204
205// Function with 250 named parameters is ordinary
206testFirstFn("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 }")
207
208// Function with 251 named parameters is variable arguments
209testFirstFn("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')
210