1 /*
2 * Copyright (c) 2010, 2011, 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 6991980
27 * @summary polymorphic signature calls don't share the same CP entries
28 * @run main TestCP
29 */
30
31 import com.sun.tools.classfile.Instruction;
32 import com.sun.tools.classfile.Attribute;
33 import com.sun.tools.classfile.ClassFile;
34 import com.sun.tools.classfile.Code_attribute;
35 import com.sun.tools.classfile.ConstantPool.*;
36 import com.sun.tools.classfile.Method;
37
38 import java.dyn.*;
39 import java.io.*;
40
41 public class TestCP {
42
43 static class TestClass {
44 void test(MethodHandle mh) throws Throwable {
45 Number n = (Number)mh.invokeExact("daddy",1,'n');
46 n = (Number)mh.invokeExact("bunny",1,'d');
47 n = (Number)(mh.invokeExact("foo",1,'d'));
48 n = (Number)((mh.invokeExact("bar",1,'d')));
49 }
50 }
51
52 static final String PS_TYPE = "(Ljava/lang/String;IC)Ljava/lang/Number;";
53 static final int PS_CALLS_COUNT = 4;
54 static final String SUBTEST_NAME = TestClass.class.getName() + ".class";
55 static final String TEST_METHOD_NAME = "test";
56
57 public static void main(String... args) throws Exception {
58 new TestCP().run();
59 }
60
61 public void run() throws Exception {
62 String workDir = System.getProperty("test.classes");
63 File compiledTest = new File(workDir, SUBTEST_NAME);
64 verifyMethodHandleInvocationDescriptors(compiledTest);
65 }
66
67 void verifyMethodHandleInvocationDescriptors(File f) {
68 System.err.println("verify: " + f);
69 try {
70 int count = 0;
71 ClassFile cf = ClassFile.read(f);
72 Method testMethod = null;
73 for (Method m : cf.methods) {
74 if (m.getName(cf.constant_pool).equals(TEST_METHOD_NAME)) {
75 testMethod = m;
76 break;
77 }
78 }
79 if (testMethod == null) {
80 throw new Error("Test method not found");
81 }
82 Code_attribute ea = (Code_attribute)testMethod.attributes.get(Attribute.Code);
83 if (testMethod == null) {
84 throw new Error("Code attribute for test() method not found");
85 }
86 int instr_count = 0;
87 int cp_entry = -1;
88
89 for (Instruction i : ea.getInstructions()) {
90 if (i.getMnemonic().equals("invokevirtual")) {
91 instr_count++;
92 if (cp_entry == -1) {
93 cp_entry = i.getUnsignedShort(1);
94 } else if (cp_entry != i.getUnsignedShort(1)) {
95 throw new Error("Unexpected CP entry in polymorphic signature call");
96 }
97 CONSTANT_Methodref_info methRef =
98 (CONSTANT_Methodref_info)cf.constant_pool.get(cp_entry);
99 String type = methRef.getNameAndTypeInfo().getType();
100 if (!type.equals(PS_TYPE)) {
101 throw new Error("Unexpected type in polymorphic signature call: " + type);
102 }
103 }
104 }
105 if (instr_count != PS_CALLS_COUNT) {
106 throw new Error("Wrong number of polymorphic signature call found: " + instr_count);
107 }
108 } catch (Exception e) {
109 e.printStackTrace();
110 throw new Error("error reading " + f +": " + e);
111 }
112 }
113 }