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*
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
* version 2 for more details (a copy is included in the LICENSE file that
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*
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* 2 along with this work; if not, write to the Free Software Foundation,
* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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*/
/*
* @test 8163808
* @modules java.base/jdk.internal.org.objectweb.asm
* @run main TransitiveOverrideCFV50
*/
import java.util.*;
import java.io.File;
import java.io.FileOutputStream;
import jdk.internal.org.objectweb.asm.ClassWriter;
import jdk.internal.org.objectweb.asm.MethodVisitor;
import jdk.internal.org.objectweb.asm.AnnotationVisitor;
import jdk.internal.org.objectweb.asm.Opcodes;
/*
* Test mixed classfile version overriding handling.
* Key is to generate P2/C with an older classfile version <=50
* Correct response is B.m:2 for older classfiles
* This test was added to ensure no assertions in debug
* note: for P2/C classfile version >=51, correct answer becomes C.m:3
* public class P1.A { public int m() { return 1; }
*
* public class P1.B extends A { int m() { return 2; }
*
* public class P2.c extends P1.B { public int m() { return 3; }
*/
public class TransitiveOverrideCFV50 implements Opcodes{
static final String classP1A = "P1.A";
static final String classP1B = "P1.B";
static final String classP2C = "P2.C";
static final String callerName = classP2C;
public static void main(String[] args) throws Exception {
ClassLoader cl = new ClassLoader() {
public Class<?> loadClass(String name) throws ClassNotFoundException {
if (findLoadedClass(name) != null) {
return findLoadedClass(name);
}
if (classP1A.equals(name)) {
byte[] classFile = dumpP1A();
return defineClass(classP1A, classFile, 0, classFile.length);
}
if (classP1B.equals(name)) {
byte[] classFile = dumpP1B();
return defineClass(classP1B, classFile, 0, classFile.length);
}
if (classP2C.equals(name)) {
byte[] classFile = dumpP2C();
return defineClass(classP2C, classFile, 0, classFile.length);
}
return super.loadClass(name);
}
};
cl.loadClass(classP1A);
cl.loadClass(classP1B);
cl.loadClass(classP2C);
//cl.loadClass(callerName).getDeclaredMethod("test");
cl.loadClass(callerName).newInstance();
int result = (Integer)cl.loadClass(callerName).getDeclaredMethod("test").invoke(null);
if (result != 2) {
throw new RuntimeException("expected B.m:2, got " + result);
}
}
public static byte[] dumpP1A() {
ClassWriter cw = new ClassWriter(0);
MethodVisitor mv;
cw.visit(V1_7, ACC_PUBLIC + ACC_SUPER, "P1/A", null, "java/lang/Object", null);
{
mv = cw.visitMethod(ACC_PUBLIC, "<init>", "()V", null, null);
mv.visitCode();
mv.visitVarInsn(ALOAD, 0);
mv.visitMethodInsn(INVOKESPECIAL, "java/lang/Object", "<init>", "()V", false);
mv.visitInsn(RETURN);
mv.visitMaxs(1, 1);
mv.visitEnd();
}
{
mv = cw.visitMethod(ACC_PUBLIC, "m", "()I", null, null);
mv.visitCode();
mv.visitFieldInsn(GETSTATIC, "java/lang/System", "out", "Ljava/io/PrintStream;");
mv.visitLdcInsn("A.m");
mv.visitMethodInsn(INVOKEVIRTUAL, "java/io/PrintStream", "println", "(Ljava/lang/String;)V", false);
mv.visitIntInsn(BIPUSH, 1);
mv.visitInsn(IRETURN);
mv.visitMaxs(2, 1);
mv.visitEnd();
}
cw.visitEnd();
return cw.toByteArray();
}
public static byte[] dumpP1B() {
ClassWriter cw = new ClassWriter(0);
MethodVisitor mv;
cw.visit(V1_8, ACC_PUBLIC + ACC_SUPER, "P1/B", null, "P1/A", null);
{
mv = cw.visitMethod(ACC_PUBLIC, "<init>", "()V", null, null);
mv.visitCode();
mv.visitVarInsn(ALOAD, 0);
mv.visitMethodInsn(INVOKESPECIAL, "P1/A", "<init>", "()V", false);
mv.visitInsn(RETURN);
mv.visitMaxs(1, 1);
mv.visitEnd();
}
{
mv = cw.visitMethod(0, "m", "()I", null, null);
mv.visitCode();
mv.visitFieldInsn(GETSTATIC, "java/lang/System", "out", "Ljava/io/PrintStream;");
mv.visitLdcInsn("B.m");
mv.visitMethodInsn(INVOKEVIRTUAL, "java/io/PrintStream", "println", "(Ljava/lang/String;)V", false);
mv.visitIntInsn(BIPUSH, 2);
mv.visitInsn(IRETURN);
mv.visitMaxs(2, 1);
mv.visitEnd();
}
cw.visitEnd();
return cw.toByteArray();
}
public static byte[] dumpP2C() {
ClassWriter cw = new ClassWriter(0);
MethodVisitor mv;
cw.visit(V1_6, ACC_PUBLIC + ACC_SUPER, "P2/C", null, "P1/B", null);
{
mv = cw.visitMethod(ACC_PUBLIC, "<init>", "()V", null, null);
mv.visitCode();
mv.visitVarInsn(ALOAD, 0);
mv.visitMethodInsn(INVOKESPECIAL, "P1/B", "<init>", "()V", false);
mv.visitInsn(RETURN);
mv.visitMaxs(1, 1);
mv.visitEnd();
}
{
mv = cw.visitMethod(ACC_PUBLIC, "m", "()I", null, null);
mv.visitCode();
mv.visitFieldInsn(GETSTATIC, "java/lang/System", "out", "Ljava/io/PrintStream;");
mv.visitLdcInsn("P2/C.m");
mv.visitMethodInsn(INVOKEVIRTUAL, "java/io/PrintStream", "println", "(Ljava/lang/String;)V", false);
mv.visitIntInsn(BIPUSH, 3);
mv.visitInsn(IRETURN);
mv.visitMaxs(2, 1);
mv.visitEnd();
}
{
mv = cw.visitMethod(ACC_PUBLIC + ACC_STATIC, "test", "()I", null, null);
mv.visitCode();
mv.visitTypeInsn(NEW, "P2/C");
mv.visitInsn(DUP);
mv.visitMethodInsn(INVOKESPECIAL, "P2/C", "<init>", "()V", false);
mv.visitMethodInsn(INVOKEVIRTUAL, "P1/A", "m", "()I", false);
mv.visitInsn(IRETURN);
mv.visitMaxs(3, 2);
mv.visitEnd();
}
cw.visitEnd();
return cw.toByteArray();
}
}