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 8266925
27 * @summary hidden class members can't be statically invocable
28 * @modules java.base/jdk.internal.misc
29 * @build java.base/*
30 * @run testng StaticInvocableTest
31 */
32
33 import java.lang.classfile.ClassFile;
34 import java.lang.constant.ClassDesc;
35 import java.lang.constant.MethodTypeDesc;
36 import java.lang.invoke.MethodHandle;
37 import java.lang.invoke.MethodHandles.Lookup;
38 import java.lang.invoke.MethodType;
39 import java.lang.invoke.LookupHelper;
40 import java.lang.reflect.AccessFlag;
41 import org.testng.annotations.Test;
42
43 import static java.lang.classfile.ClassFile.ACC_PUBLIC;
44 import static java.lang.classfile.ClassFile.ACC_STATIC;
45 import static java.lang.constant.ConstantDescs.CD_Object;
46 import static java.lang.constant.ConstantDescs.CD_int;
47 import static java.lang.constant.ConstantDescs.INIT_NAME;
99
100 // Wrap target into LF (convert) to get "target" referenced from LF
101 MethodHandle wrappedMH = target.asType(MethodType.methodType(Object.class, Integer.class));
102
103 // Invoke enough times to provoke LF compilation to bytecode.
104 for (int i = 0; i<100; i++) {
105 Object r = wrappedMH.invokeExact((Integer)1);
106 }
107 }
108
109 /*
110 * Constructs bytecode for the following class:
111 * public class pkg.MyClass {
112 * MyClass() {}
113 * public Object get(int i) { return null; }
114 * }
115 */
116 public static byte[] dumpClass(String pkg) {
117 return ClassFile.of().build(ClassDesc.of(pkg.replace('/', '.'), "MyClass"), clb -> {
118 clb.withSuperclass(CD_Object);
119 clb.withFlags(AccessFlag.PUBLIC, AccessFlag.SUPER);
120 clb.withMethodBody(INIT_NAME, MTD_void, 0, cob -> {
121 cob.aload(0);
122 cob.invokespecial(CD_Object, INIT_NAME, MTD_void);
123 cob.return_();
124 });
125 clb.withMethodBody("get", MethodTypeDesc.of(CD_Object, CD_int),
126 ACC_PUBLIC | ACC_STATIC, cob -> {
127 cob.aconst_null();
128 cob.areturn();
129 });
130 });
131 }
132 }
|
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 8266925
27 * @summary hidden class members can't be statically invocable
28 * @enablePreview
29 * @modules java.base/jdk.internal.misc
30 * @build java.base/*
31 * @run testng StaticInvocableTest
32 */
33
34 import java.lang.classfile.ClassFile;
35 import java.lang.constant.ClassDesc;
36 import java.lang.constant.MethodTypeDesc;
37 import java.lang.invoke.MethodHandle;
38 import java.lang.invoke.MethodHandles.Lookup;
39 import java.lang.invoke.MethodType;
40 import java.lang.invoke.LookupHelper;
41 import java.lang.reflect.AccessFlag;
42 import org.testng.annotations.Test;
43
44 import static java.lang.classfile.ClassFile.ACC_PUBLIC;
45 import static java.lang.classfile.ClassFile.ACC_STATIC;
46 import static java.lang.constant.ConstantDescs.CD_Object;
47 import static java.lang.constant.ConstantDescs.CD_int;
48 import static java.lang.constant.ConstantDescs.INIT_NAME;
100
101 // Wrap target into LF (convert) to get "target" referenced from LF
102 MethodHandle wrappedMH = target.asType(MethodType.methodType(Object.class, Integer.class));
103
104 // Invoke enough times to provoke LF compilation to bytecode.
105 for (int i = 0; i<100; i++) {
106 Object r = wrappedMH.invokeExact((Integer)1);
107 }
108 }
109
110 /*
111 * Constructs bytecode for the following class:
112 * public class pkg.MyClass {
113 * MyClass() {}
114 * public Object get(int i) { return null; }
115 * }
116 */
117 public static byte[] dumpClass(String pkg) {
118 return ClassFile.of().build(ClassDesc.of(pkg.replace('/', '.'), "MyClass"), clb -> {
119 clb.withSuperclass(CD_Object);
120 clb.withFlags(AccessFlag.PUBLIC, AccessFlag.IDENTITY);
121 clb.withMethodBody(INIT_NAME, MTD_void, 0, cob -> {
122 cob.aload(0);
123 cob.invokespecial(CD_Object, INIT_NAME, MTD_void);
124 cob.return_();
125 });
126 clb.withMethodBody("get", MethodTypeDesc.of(CD_Object, CD_int),
127 ACC_PUBLIC | ACC_STATIC, cob -> {
128 cob.aconst_null();
129 cob.areturn();
130 });
131 });
132 }
133 }
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