JDK-8006529.js revision 117:927fba6785b0 
1/*
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3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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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
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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")
48
49// Compiler class methods and fields
50var parseMethod = Parser.class.getMethod("parse");
51var compileMethod = Compiler.class.getMethod("compile");
52
53// NOTE: private field. But this is a trusted test!
54// Compiler.functionNode
55var functionNodeField = Compiler.class.getDeclaredField("functionNode");
56functionNodeField.setAccessible(true);
57
58// FunctionNode methods
59
60// FunctionNode.getFunctions method
61var getFunctionsMethod = FunctionNode.class.getMethod("getFunctions");
62
63// These are method names of methods in FunctionNode class
64var allAssertionList = ['isVarArg', 'needsParentScope', 'needsCallee', 'needsScope', 'needsSelfSymbol', 'isSplit', 'hasEval', 'hasWith', 'hasDeepWithOrEval', 'allVarsInScope', 'isStrictMode']
65
66// corresponding Method objects of FunctionNode class
67var functionNodeMethods = {};
68// initialize FunctionNode methods
69(function() {
70    for (var f in allAssertionList) {
71        var method = allAssertionList[f];
72        functionNodeMethods[method] = FunctionNode.class.getMethod(method);
73    }
74})();
75
76// returns "script" functionNode from Compiler instance
77function getScriptNode(compiler) {
78    // compiler.functionNode
79    return functionNodeField.get(compiler);
80}
81
82// returns functionNode.getFunctions().get(0)
83function getFirstFunction(functionNode) {
84    // functionNode.getFunctions().get(0)
85    return getFunctionsMethod.invoke(functionNode).get(0);
86}
87
88// compile(script) -- compiles a script specified as a string with its
89// source code, returns a jdk.nashorn.internal.ir.FunctionNode object
90// representing it.
91function compile(source) {
92    var source   = new Source("<no name>", source);
93    var parser   = new Parser(Context.getContext().getEnv(), source, null);
94    var func     = parseMethod.invoke(parser);
95    var compiler = new Compiler(Context.getContext().getEnv(), func);
96
97    compileMethod.invoke(compiler);
98
99    return getScriptNode(compiler);
100};
101
102var allAssertions = (function() {
103    var allAssertions = {}
104    for(var assertion in allAssertionList) {
105        allAssertions[allAssertionList[assertion]] = true
106    }
107    return allAssertions;
108})();
109
110
111// test(f[, assertions...]) tests whether all the specified assertions on the
112// passed function node are true.
113function test(f) {
114    var assertions = {}
115    for(var i = 1; i < arguments.length; ++i) {
116        var assertion = arguments[i]
117        if(!allAssertions[assertion]) {
118            throw "Unknown assertion " + assertion + " for " + f;
119        }
120        assertions[assertion] = true
121    }
122    for(var assertion in allAssertions) {
123        var expectedValue = !!assertions[assertion]
124        if(functionNodeMethods[assertion].invoke(f) !== expectedValue) {
125            throw "Expected " + assertion + " === " + expectedValue + " for " + f;
126        }
127    }
128}
129
130// testFirstFn(script[, assertions...] tests whether all the specified
131// assertions are true in the first function in the given script; "script"
132// is a string with the source text of the script.
133function testFirstFn(script) {
134    arguments[0] = getFirstFunction(compile(script))
135    test.apply(null, arguments)
136}
137
138// ---------------------------------- ACTUAL TESTS START HERE --------------
139
140// The simplest possible functions have no attributes set
141testFirstFn("function f() { }")
142testFirstFn("function f(x) { x }")
143
144// A function referencing a global needs parent scope, and it needs callee
145// (because parent scope is passed through callee)
146testFirstFn("function f() { x }", 'needsCallee', 'needsParentScope')
147
148// A function referencing "arguments" will have to be vararg. It also needs
149// the callee, as it needs to fill out "arguments.callee".
150testFirstFn("function f() { arguments }", 'needsCallee', 'isVarArg')
151
152// A function referencing "arguments" will have to be vararg. If it is
153// strict, it will not have to have a callee, though.
154testFirstFn("function f() {'use strict'; arguments }", 'isVarArg', 'isStrictMode')
155
156// A function defining "arguments" as a parameter will not be vararg.
157testFirstFn("function f(arguments) { arguments }")
158
159// A function defining "arguments" as a nested function will not be vararg.
160testFirstFn("function f() { function arguments() {}; arguments; }")
161
162// A function defining "arguments" as a local variable will be vararg.
163testFirstFn("function f() { var arguments; arguments; }", 'isVarArg', 'needsCallee')
164
165// A self-referencing function defined as a statement doesn't need a self
166// symbol, as it'll rather obtain itself from the parent scope.
167testFirstFn("function f() { f() }", 'needsCallee', 'needsParentScope')
168
169// A self-referencing function defined as an expression needs a self symbol,
170// as it can't obtain itself from the parent scope.
171testFirstFn("(function f() { f() })", 'needsCallee', 'needsSelfSymbol')
172
173// A child function accessing parent's variable triggers the need for scope
174// in parent
175testFirstFn("(function f() { var x; function g() { x } })", 'needsScope')
176
177// A child function accessing parent's parameter triggers the need for scope
178// in parent
179testFirstFn("(function f(x) { function g() { x } })", 'needsScope')
180
181// A child function accessing a global variable triggers the need for parent
182// scope in parent
183testFirstFn("(function f() { function g() { x } })", 'needsParentScope', 'needsCallee')
184
185// A child function redefining a local variable from its parent should not
186// affect the parent function in any way
187testFirstFn("(function f() { var x; function g() { var x; x } })")
188
189// Using "with" unleashes a lot of needs: parent scope, callee, own scope,
190// and all variables in scope. Actually, we could make "with" less wasteful,
191// and only put those variables in scope that it actually references, similar
192// to what nested functions do with variables in their parents.
193testFirstFn("(function f() { var o; with(o) {} })", 'needsParentScope', 'needsCallee', 'needsScope', 'hasWith', 'hasDeepWithOrEval', 'allVarsInScope')
194
195// Using "eval" is as bad as using "with" with the added requirement of
196// being vararg, 'cause we don't know if eval will be using "arguments".
197testFirstFn("(function f() { eval() })", 'needsParentScope', 'needsCallee', 'needsScope', 'hasEval', 'isVarArg', 'hasDeepWithOrEval', 'allVarsInScope')
198
199// Nested function using "with" is pretty much the same as the parent
200// function needing with.
201testFirstFn("(function f() { function g() { var o; with(o) {} } })", 'needsParentScope', 'needsCallee', 'needsScope', 'hasDeepWithOrEval', 'allVarsInScope')
202// Nested function using "eval" is almost the same as parent function using
203// eval, but at least the parent doesn't have to be vararg.
204testFirstFn("(function f() { function g() { eval() } })", 'needsParentScope', 'needsCallee', 'needsScope', 'hasDeepWithOrEval', 'allVarsInScope')
205
206// Function with 250 named parameters is ordinary
207testFirstFn("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 }")
208
209// Function with 251 named parameters is variable arguments
210testFirstFn("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')
211