1 /*
2 * Copyright (c) 2013, 2020, 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 8009649 8129962 8238358
27 * @summary Lambda back-end should generate invokevirtual for method handles referring to
28 * private instance methods as lambda proxy is a nestmate of the target clsas
29 * @enablePreview
30 * @library /tools/javac/lib
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 TestLambdaBytecode
37 */
38
39 import java.lang.classfile.*;
40 import java.lang.classfile.attribute.*;
41 import java.lang.classfile.constantpool.*;
42 import java.lang.classfile.instruction.InvokeDynamicInstruction;
43
44 import java.io.IOException;
45 import java.io.InputStream;
46 import java.lang.invoke.MethodHandleInfo;
47
48 import combo.ComboInstance;
49 import combo.ComboParameter;
50 import combo.ComboTask.Result;
51 import combo.ComboTestHelper;
52
53 import javax.tools.JavaFileObject;
54
55 public class TestLambdaBytecode extends ComboInstance<TestLambdaBytecode> {
56
57 static final int MF_ARITY = 3;
58 static final String MH_SIG = "()V";
59
60 enum ClassKind implements ComboParameter {
61 CLASS("class"),
62 INTERFACE("interface");
63
64 String classStr;
65
66 ClassKind(String classStr) {
67 this.classStr = classStr;
68 }
69
70 @Override
71 public String expand(String optParameter) {
72 return classStr;
73 }
74 }
75
76 enum AccessKind implements ComboParameter {
77 PUBLIC("public"),
78 PRIVATE("private");
79
80 String accessStr;
81
82 AccessKind(String accessStr) {
83 this.accessStr = accessStr;
84 }
85
86 @Override
87 public String expand(String optParameter) {
88 return accessStr;
89 }
90 }
91
92 enum StaticKind implements ComboParameter {
93 STATIC("static"),
94 INSTANCE("");
95
96 String staticStr;
97
98 StaticKind(String staticStr) {
99 this.staticStr = staticStr;
100 }
101
102 @Override
103 public String expand(String optParameter) {
104 return staticStr;
105 }
106 }
107
108 enum DefaultKind implements ComboParameter {
109 DEFAULT("default"),
110 NO_DEFAULT("");
111
112 String defaultStr;
113
114 DefaultKind(String defaultStr) {
115 this.defaultStr = defaultStr;
116 }
117
118 @Override
119 public String expand(String optParameter) {
120 return defaultStr;
121 }
122 }
123
124 static class MethodKind {
125 ClassKind ck;
126 AccessKind ak;
127 StaticKind sk;
128 DefaultKind dk;
129
130 MethodKind(ClassKind ck, AccessKind ak, StaticKind sk, DefaultKind dk) {
131 this.ck = ck;
132 this.ak = ak;
133 this.sk = sk;
134 this.dk = dk;
135 }
136
137 boolean inInterface() {
138 return ck == ClassKind.INTERFACE;
139 }
140
141 boolean isPrivate() {
142 return ak == AccessKind.PRIVATE;
143 }
144
145 boolean isStatic() {
146 return sk == StaticKind.STATIC;
147 }
148
149 boolean isDefault() {
150 return dk == DefaultKind.DEFAULT;
151 }
152
153 boolean isOK() {
154 if (isDefault() && (!inInterface() || isStatic())) {
155 return false;
156 } else if (inInterface() &&
157 ((!isStatic() && !isDefault()) || isPrivate())) {
158 return false;
159 } else {
160 return true;
161 }
162 }
163 }
164
165 public static void main(String... args) throws Exception {
166 new ComboTestHelper<TestLambdaBytecode>()
167 .withDimension("CLASSKIND", (x, ck) -> x.ck = ck, ClassKind.values())
168 .withArrayDimension("ACCESS", (x, acc, idx) -> x.accessKinds[idx] = acc, 2, AccessKind.values())
169 .withArrayDimension("STATIC", (x, sk, idx) -> x.staticKinds[idx] = sk, 2, StaticKind.values())
170 .withArrayDimension("DEFAULT", (x, dk, idx) -> x.defaultKinds[idx] = dk, 2, DefaultKind.values())
171 .run(TestLambdaBytecode::new, TestLambdaBytecode::init);
172 }
173
174 ClassKind ck;
175 AccessKind[] accessKinds = new AccessKind[2];
176 StaticKind[] staticKinds = new StaticKind[2];
177 DefaultKind[] defaultKinds = new DefaultKind[2];
178 MethodKind mk1, mk2;
179
180 void init() {
181 mk1 = new MethodKind(ck, accessKinds[0], staticKinds[0], defaultKinds[0]);
182 mk2 = new MethodKind(ck, accessKinds[1], staticKinds[1], defaultKinds[1]);
183 }
184
185 String source_template =
186 "#{CLASSKIND} Test {\n" +
187 " #{ACCESS[0]} #{STATIC[0]} #{DEFAULT[0]} void test() { Runnable r = ()->{ target(); }; }\n" +
188 " #{ACCESS[1]} #{STATIC[1]} #{DEFAULT[1]} void target() { }\n" +
189 "}\n";
190
191 @Override
192 public void doWork() throws IOException {
193 newCompilationTask()
194 .withSourceFromTemplate(source_template)
195 .generate(this::verifyBytecode);
196 }
197
198 void verifyBytecode(Result<Iterable<? extends JavaFileObject>> res) {
199 if (res.hasErrors()) {
200 boolean errorExpected = !mk1.isOK() || !mk2.isOK();
201 errorExpected |= mk1.isStatic() && !mk2.isStatic();
202
203 if (!errorExpected) {
204 fail("Diags found when compiling instance; " + res.compilationInfo());
205 }
206 return;
207 }
208 try (InputStream is = res.get().iterator().next().openInputStream()) {
209 ClassModel cf = ClassFile.of().parse(is.readAllBytes());
210 MethodModel testMethod = null;
211 for (MethodModel m : cf.methods()) {
212 if (m.methodName().equalsString("test")) {
213 testMethod = m;
214 break;
215 }
216 }
217 if (testMethod == null) {
218 fail("Test method not found");
219 return;
220 }
221 CodeAttribute ea = testMethod.findAttribute(Attributes.code()).orElse(null);
222 if (ea == null) {
223 fail("Code attribute for test() method not found");
224 return;
225 }
226
227 int bsmIdx = -1;
228
229 for (CodeElement ce : ea.elementList()) {
230 if (ce instanceof InvokeDynamicInstruction indy) {
231 InvokeDynamicEntry indyInfo = indy.invokedynamic();
232 bsmIdx = indyInfo.bootstrap().bsmIndex();
233 if (!indyInfo.type().equalsString(makeIndyType())) {
234 fail("type mismatch for CONSTANT_InvokeDynamic_info " +
235 res.compilationInfo() + "\n" + indyInfo.type().stringValue() +
236 "\n" + makeIndyType());
237 return;
238 }
239 }
240 }
241 if (bsmIdx == -1) {
242 fail("Missing invokedynamic in generated code");
243 return;
244 }
245
246 BootstrapMethodsAttribute bsm_attr = cf.findAttribute(Attributes.bootstrapMethods()).orElseThrow();
247 if (bsm_attr.bootstrapMethodsSize() != 1) {
248 fail("Bad number of method specifiers " +
249 "in BootstrapMethods attribute");
250 return;
251 }
252 BootstrapMethodEntry bsm_spec = bsm_attr.bootstrapMethods().get(0);
253
254 if (bsm_spec.arguments().size() != MF_ARITY) {
255 fail("Bad number of static invokedynamic args " +
256 "in BootstrapMethod attribute");
257 return;
258 }
259
260 MethodHandleEntry mh = (MethodHandleEntry) bsm_spec.arguments().get(1);
261
262 boolean kindOK = switch (mh.kind()) {
263 case MethodHandleInfo.REF_invokeStatic -> mk2.isStatic();
264 case MethodHandleInfo.REF_invokeVirtual -> !mk2.isStatic() && !mk2.inInterface();
265 case MethodHandleInfo.REF_invokeInterface -> mk2.inInterface();
266 default -> false;
267 };
268
269 if (!kindOK) {
270 fail("Bad invoke kind in implementation method handle: " + mh.kind());
271 return;
272 }
273
274 if (!mh.reference().type().equalsString(MH_SIG)) {
275 fail("Type mismatch in implementation method handle");
276 return;
277 }
278 } catch (Exception e) {
279 e.printStackTrace();
280 fail("error reading " + res.compilationInfo() + ": " + e);
281 }
282 }
283
284 String makeIndyType() {
285 StringBuilder buf = new StringBuilder();
286 buf.append("(");
287 if (!mk2.isStatic()) {
288 buf.append("LTest;");
289 }
290 buf.append(")Ljava/lang/Runnable;");
291 return buf.toString();
292 }
293 }