hotspot/test/runtime/RedefineFinalizer/Agent.java
changeset 24828 dd5406c950a1
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/hotspot/test/runtime/RedefineFinalizer/Agent.java	Wed May 28 07:36:32 2014 -0700
@@ -0,0 +1,94 @@
+/*
+ * Copyright (c) 2014, Oracle and/or its affiliates. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * 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
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+
+import java.lang.instrument.Instrumentation;
+import java.lang.instrument.ClassDefinition;
+
+import jdk.internal.org.objectweb.asm.ClassWriter;
+import jdk.internal.org.objectweb.asm.Label;
+import jdk.internal.org.objectweb.asm.MethodVisitor;
+import jdk.internal.org.objectweb.asm.Opcodes;
+
+public class Agent implements Opcodes {
+
+    private static byte[] makeNewMartyr() {
+        ClassWriter cw = new ClassWriter(0);
+        MethodVisitor mv;
+
+        cw.visit(V1_8, ACC_PUBLIC + ACC_SUPER, "Martyr", null, "java/lang/Object", null);
+        cw.visitSource(null, null);
+
+        {
+            mv = cw.visitMethod(ACC_PUBLIC, "<init>", "()V", null, null);
+            mv.visitCode();
+            Label lab0 = new Label();
+            mv.visitLabel(lab0);
+            mv.visitLineNumber(1, lab0);
+            mv.visitVarInsn(ALOAD, 0);
+            mv.visitMethodInsn(INVOKESPECIAL, "java/lang/Object", "<init>", "()V");
+            mv.visitInsn(RETURN);
+            mv.visitMaxs(1, 1);
+            mv.visitEnd();
+        }
+
+        {
+            mv = cw.visitMethod(ACC_PUBLIC, "getName", "()Ljava/lang/String;", null, null);
+            mv.visitCode();
+            Label lab0 = new Label();
+            mv.visitLabel(lab0);
+            mv.visitLineNumber(6, lab0);
+            mv.visitLdcInsn("Redefinition done");
+            mv.visitInsn(ARETURN);
+            mv.visitMaxs(1, 1);
+            mv.visitEnd();
+        }
+
+        {
+            mv = cw.visitMethod(ACC_PROTECTED, "finalize", "()V", null, null);
+            mv.visitCode();
+            Label lab0 = new Label();
+            mv.visitLabel(lab0);
+            mv.visitLineNumber(8, lab0);
+            mv.visitFieldInsn(GETSTATIC, "java/lang/System", "out", "Ljava/io/PrintStream;");
+            mv.visitLdcInsn("Finalizer called");
+            mv.visitMethodInsn(INVOKEVIRTUAL, "java/io/PrintStream", "println", "(Ljava/lang/String;)V");
+            mv.visitInsn(RETURN);
+            mv.visitMaxs(2, 1);
+            mv.visitEnd();
+        }
+
+        cw.visitEnd();
+        return cw.toByteArray();
+    }
+
+
+    public static void premain(String args, Instrumentation inst) throws Exception {
+        agentmain(args, inst);
+    }
+
+    public static void agentmain(String args, Instrumentation inst) throws Exception {
+        ClassDefinition martyrDef =
+              new ClassDefinition(Class.forName("Martyr"), makeNewMartyr());
+        inst.redefineClasses(martyrDef);
+    }
+}