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 * @summary Test that StringConcat is working for JDK >= 9
27 * @compile -source 6 -target 6 TestIndyStringConcat.java
28 * @run main TestIndyStringConcat false
29 * @clean TestIndyStringConcat*
30 * @compile -source 7 -target 7 TestIndyStringConcat.java
31 * @run main TestIndyStringConcat false
32 * @clean TestIndyStringConcat*
33 * @compile -source 8 -target 8 TestIndyStringConcat.java
34 * @run main TestIndyStringConcat false
35 * @clean TestIndyStringConcat*
36 * @compile -XDstringConcat=inline -source 9 -target 9 TestIndyStringConcat.java
37 * @run main TestIndyStringConcat false
38 * @clean TestIndyStringConcat*
39 * @compile -XDstringConcat=indy -source 9 -target 9 TestIndyStringConcat.java
40 * @run main TestIndyStringConcat true
41 * @clean TestIndyStringConcat*
42 * @compile -XDstringConcat=indyWithConstants -source 9 -target 9 TestIndyStringConcat.java
43 * @run main TestIndyStringConcat true
44 */
45 public class TestIndyStringConcat {
46
47 private static class MyObject {
48 public String toString() {
49 throw new RuntimeException("Boyyaa");
50 }
51 }
52
53 class Inner { }
54
55 public static void main(String[] args) {
56 boolean useIndyConcat = Boolean.valueOf(args[0]);
57 try {
58 String s = "Foo" + new MyObject();
59 } catch (RuntimeException ex) {
60 boolean indifiedStringConcat = false;
61 ex.printStackTrace();
62 for (StackTraceElement e : ex.getStackTrace()) {
63 if (e.getClassName().contains("$$StringConcat") &&
64 e.getMethodName().equals("concat")) {
65 indifiedStringConcat = true;
66 break;
67 }
68 }
69 if (indifiedStringConcat != useIndyConcat) {
70 throw new AssertionError();
71 }
72 }
73 }
74 }
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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 import com.sun.tools.classfile.*;
25 import com.sun.tools.classfile.BootstrapMethods_attribute.BootstrapMethodSpecifier;
26 import com.sun.tools.classfile.ConstantPool.CONSTANT_InvokeDynamic_info;
27 import com.sun.tools.classfile.ConstantPool.CONSTANT_MethodHandle_info;
28
29 import java.io.File;
30
31 /*
32 * @test
33 * @bug 8148483 8151516 8151223
34 * @summary Test that StringConcat is working for JDK >= 9
35 * @modules jdk.jdeps/com.sun.tools.classfile
36 *
37 * @clean TestIndyStringConcat*
38 * @compile -source 6 -target 6 TestIndyStringConcat.java
39 * @run main TestIndyStringConcat false
40 *
41 * @clean TestIndyStringConcat*
42 * @compile -source 7 -target 7 TestIndyStringConcat.java
43 * @run main TestIndyStringConcat false
44 *
45 * @clean TestIndyStringConcat*
46 * @compile -source 8 -target 8 TestIndyStringConcat.java
47 * @run main TestIndyStringConcat false
48 *
49 * @clean TestIndyStringConcat*
50 * @compile -XDstringConcat=inline -source 9 -target 9 TestIndyStringConcat.java
51 * @run main TestIndyStringConcat false
52 *
53 * @clean TestIndyStringConcat*
54 * @compile -XDstringConcat=indy -source 9 -target 9 TestIndyStringConcat.java
55 * @run main TestIndyStringConcat true
56 *
57 * @clean TestIndyStringConcat*
58 * @compile -XDstringConcat=indyWithConstants -source 9 -target 9 TestIndyStringConcat.java
59 * @run main TestIndyStringConcat true
60 */
61 public class TestIndyStringConcat {
62
63 static String other;
64
65 public static String test() {
66 return "Foo" + other;
67 }
68
69 public static void main(String[] args) throws Exception {
70 boolean expected = Boolean.valueOf(args[0]);
71 boolean actual = hasStringConcatFactoryCall("test");
72 if (expected != actual) {
73 throw new AssertionError("expected = " + expected + ", actual = " + actual);
74 }
75 }
76
77 public static boolean hasStringConcatFactoryCall(String methodName) throws Exception {
78 ClassFile classFile = ClassFile.read(new File(System.getProperty("test.classes", "."),
79 TestIndyStringConcat.class.getName() + ".class"));
80 ConstantPool constantPool = classFile.constant_pool;
81
82 BootstrapMethods_attribute bsm_attr =
83 (BootstrapMethods_attribute)classFile
84 .getAttribute(Attribute.BootstrapMethods);
85
86 for (Method method : classFile.methods) {
87 if (method.getName(constantPool).equals(methodName)) {
88 Code_attribute code = (Code_attribute) method.attributes
89 .get(Attribute.Code);
90 for (Instruction i : code.getInstructions()) {
91 if (i.getOpcode() == Opcode.INVOKEDYNAMIC) {
92 CONSTANT_InvokeDynamic_info indyInfo =
93 (CONSTANT_InvokeDynamic_info) constantPool.get(i.getUnsignedShort(1));
94
95 BootstrapMethodSpecifier bsmSpec =
96 bsm_attr.bootstrap_method_specifiers[indyInfo.bootstrap_method_attr_index];
97
98 CONSTANT_MethodHandle_info bsmInfo =
99 (CONSTANT_MethodHandle_info) constantPool.get(bsmSpec.bootstrap_method_ref);
100
101 if (bsmInfo.getCPRefInfo().getClassName().equals("java/lang/invoke/StringConcatFactory")) {
102 return true;
103 }
104 }
105 }
106 }
107 }
108 return false;
109 }
110
111 }
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