1 /*
2 * Copyright (c) 2011, 2015, 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 * @test
26 * @bug 7042566 8006694 8129962
27 * @summary Unambiguous varargs method calls flagged as ambiguous
28 * temporarily workaround combo tests are causing time out in several platforms
29 * @library /tools/javac/lib
30 * @enablePreview
31 * @modules java.base/jdk.internal.classfile.impl
32 * jdk.compiler/com.sun.tools.javac.api
33 * jdk.compiler/com.sun.tools.javac.file
34 * jdk.compiler/com.sun.tools.javac.util
35 * @build combo.ComboTestHelper
36 * @run main T7042566
37 */
38
39 import java.io.IOException;
40 import java.io.InputStream;
41 import javax.tools.JavaFileObject;
42
43 import java.lang.classfile.*;
44 import java.lang.classfile.attribute.CodeAttribute;
45 import java.lang.classfile.constantpool.MemberRefEntry;
46 import java.lang.classfile.constantpool.MethodRefEntry;
47 import java.lang.classfile.instruction.InvokeInstruction;
48 import com.sun.tools.javac.util.List;
49
50 import combo.ComboInstance;
51 import combo.ComboParameter;
52 import combo.ComboTask.Result;
53 import combo.ComboTestHelper;
54
55 public class T7042566 extends ComboInstance<T7042566> {
56
57 enum TypeKind {
58 OBJECT("Object", "(Object)null", "Ljava/lang/Object;"),
59 STRING("String", "(String)null", "Ljava/lang/String;");
60
61 String typeString;
62 String valueString;
63 String bytecodeString;
64
65 TypeKind(String typeString, String valueString, String bytecodeString) {
66 this.typeString = typeString;
67 this.valueString = valueString;
68 this.bytecodeString = bytecodeString;
69 }
70
71 boolean isSubtypeOf(TypeKind that) {
72 return that == OBJECT ||
73 (that == STRING && this == STRING);
74 }
75 }
76
77 enum TypeConfiguration implements ComboParameter {
78 A(TypeKind.OBJECT),
79 B(TypeKind.STRING),
80 AA(TypeKind.OBJECT, TypeKind.OBJECT),
81 AB(TypeKind.OBJECT, TypeKind.STRING),
82 BA(TypeKind.STRING, TypeKind.OBJECT),
83 BB(TypeKind.STRING, TypeKind.STRING),
84 AAA(TypeKind.OBJECT, TypeKind.OBJECT, TypeKind.OBJECT),
85 AAB(TypeKind.OBJECT, TypeKind.OBJECT, TypeKind.STRING),
86 ABA(TypeKind.OBJECT, TypeKind.STRING, TypeKind.OBJECT),
87 ABB(TypeKind.OBJECT, TypeKind.STRING, TypeKind.STRING),
88 BAA(TypeKind.STRING, TypeKind.OBJECT, TypeKind.OBJECT),
89 BAB(TypeKind.STRING, TypeKind.OBJECT, TypeKind.STRING),
90 BBA(TypeKind.STRING, TypeKind.STRING, TypeKind.OBJECT),
91 BBB(TypeKind.STRING, TypeKind.STRING, TypeKind.STRING);
92
93 List<TypeKind> typeKindList;
94 String expressionListStr;
95 String parameterListStr;
96 String bytecodeSigStr;
97
98 TypeConfiguration(TypeKind... typeKindList) {
99 this.typeKindList = List.from(typeKindList);
100 expressionListStr = asExpressionList();
101 parameterListStr = asParameterList();
102 bytecodeSigStr = asBytecodeString();
103 }
104
105 private String asExpressionList() {
106 StringBuilder buf = new StringBuilder();
107 String sep = "";
108 for (TypeKind tk : typeKindList) {
109 buf.append(sep);
110 buf.append(tk.valueString);
111 sep = ",";
112 }
113 return buf.toString();
114 }
115
116 private String asParameterList() {
117 StringBuilder buf = new StringBuilder();
118 String sep = "";
119 int count = 0;
120 for (TypeKind arg : typeKindList) {
121 buf.append(sep);
122 buf.append(arg.typeString);
123 if (count == (typeKindList.size() - 1)) {
124 buf.append("...");
125 }
126 buf.append(" ");
127 buf.append("arg" + count++);
128 sep = ",";
129 }
130 return buf.toString();
131 }
132
133 private String asBytecodeString() {
134 StringBuilder buf = new StringBuilder();
135 int count = 0;
136 for (TypeKind arg : typeKindList) {
137 if (count == (typeKindList.size() - 1)) {
138 buf.append("[");
139 }
140 buf.append(arg.bytecodeString);
141 count++;
142 }
143 return buf.toString();
144 }
145
146 @Override
147 public String expand(String optParameter) {
148 return expressionListStr;
149 }
150 }
151
152 static class VarargsMethod {
153 TypeConfiguration parameterTypes;
154
155 public VarargsMethod(TypeConfiguration parameterTypes) {
156 this.parameterTypes = parameterTypes;
157 }
158
159 @Override
160 public String toString() {
161 return "void m( " + parameterTypes.parameterListStr + ") {}";
162 }
163
164 boolean isApplicable(TypeConfiguration that) {
165 List<TypeKind> actuals = that.typeKindList;
166 List<TypeKind> formals = parameterTypes.typeKindList;
167 if ((actuals.size() - formals.size()) < -1)
168 return false; //not enough args
169 for (TypeKind actual : actuals) {
170 if (!actual.isSubtypeOf(formals.head))
171 return false; //type mismatch
172 formals = formals.tail.isEmpty() ?
173 formals :
174 formals.tail;
175 }
176 return true;
177 }
178
179 boolean isMoreSpecificThan(VarargsMethod that) {
180 List<TypeKind> actuals = parameterTypes.typeKindList;
181 List<TypeKind> formals = that.parameterTypes.typeKindList;
182 int checks = 0;
183 int expectedCheck = Math.max(actuals.size(), formals.size());
184 while (checks < expectedCheck) {
185 if (!actuals.head.isSubtypeOf(formals.head))
186 return false; //type mismatch
187 formals = formals.tail.isEmpty() ?
188 formals :
189 formals.tail;
190 actuals = actuals.tail.isEmpty() ?
191 actuals :
192 actuals.tail;
193 checks++;
194 }
195 return true;
196 }
197 }
198
199 public static void main(String[] args) {
200 new ComboTestHelper<T7042566>()
201 .withArrayDimension("SIG", (x, sig, idx) -> x.methodSignatures[idx] = sig, 2, TypeConfiguration.values())
202 .withDimension("ACTUALS", (x, actuals) -> x.actuals = actuals, TypeConfiguration.values())
203 .run(T7042566::new, T7042566::setup);
204 }
205
206 VarargsMethod m1;
207 VarargsMethod m2;
208 TypeConfiguration[] methodSignatures = new TypeConfiguration[2];
209 TypeConfiguration actuals;
210
211 void setup() {
212 this.m1 = new VarargsMethod(methodSignatures[0]);
213 this.m2 = new VarargsMethod(methodSignatures[1]);
214 }
215
216 final String source_template = "class Test {\n" +
217 " #{METH.1}\n" +
218 " #{METH.2}\n" +
219 " void test() { m(#{ACTUALS}); }\n" +
220 "}";
221
222 @Override
223 public void doWork() throws IOException {
224 newCompilationTask()
225 .withSourceFromTemplate(source_template, this::getMethodDecl)
226 .generate(this::check);
227 }
228
229 ComboParameter getMethodDecl(String parameterName) {
230 switch (parameterName) {
231 case "METH": return optParameter -> {
232 return optParameter.equals("1") ?
233 m1.toString() : m2.toString();
234 };
235 default:
236 return null;
237 }
238 }
239
240 void check(Result<Iterable<? extends JavaFileObject>> res) {
241 boolean resolutionError = false;
242 VarargsMethod selectedMethod = null;
243
244 boolean m1_applicable = m1.isApplicable(actuals);
245 boolean m2_applicable = m2.isApplicable(actuals);
246
247 if (!m1_applicable && !m2_applicable) {
248 resolutionError = true;
249 } else if (m1_applicable && m2_applicable) {
250 //most specific
251 boolean m1_moreSpecific = m1.isMoreSpecificThan(m2);
252 boolean m2_moreSpecific = m2.isMoreSpecificThan(m1);
253
254 resolutionError = m1_moreSpecific == m2_moreSpecific;
255 selectedMethod = m1_moreSpecific ? m1 : m2;
256 } else {
257 selectedMethod = m1_applicable ?
258 m1 : m2;
259 }
260
261 if (res.hasErrors() != resolutionError) {
262 fail("invalid diagnostics for source:\n" +
263 res.compilationInfo() +
264 "\nExpected resolution error: " + resolutionError +
265 "\nFound error: " + res.hasErrors());
266 } else if (!resolutionError) {
267 verifyBytecode(res, selectedMethod);
268 }
269 }
270
271 void verifyBytecode(Result<Iterable<? extends JavaFileObject>> res, VarargsMethod selected) {
272 try (InputStream is = res.get().iterator().next().openInputStream()) {
273 ClassModel cf = ClassFile.of().parse(is.readAllBytes());
274 MethodModel testMethod = null;
275 for (MethodModel m : cf.methods()) {
276 if (m.methodName().equalsString("test")) {
277 testMethod = m;
278 break;
279 }
280 }
281 if (testMethod == null) {
282 fail("Test method not found");
283 return;
284 }
285 CodeAttribute ea = testMethod.findAttribute(Attributes.code()).orElse(null);
286 if (ea == null) {
287 fail("Code attribute for test() method not found");
288 return;
289 }
290 for (CodeElement i : ea.elementList()) {
291 if (i instanceof InvokeInstruction ins && ins.opcode() == Opcode.INVOKEVIRTUAL) {
292 MemberRefEntry methRef = ins.method();
293 String type = methRef.type().stringValue();
294 String sig = selected.parameterTypes.bytecodeSigStr;
295 if (!type.contains(sig)) {
296 fail("Unexpected type method call: " +
297 type + "" +
298 "\nfound: " + sig +
299 "\n" + res.compilationInfo());
300 return;
301 }
302 break;
303 }
304 }
305 } catch (Exception e) {
306 e.printStackTrace();
307 fail("error reading classfile; " + res.compilationInfo() +": " + e);
308 }
309 }
310 }