| /* |
| * Copyright (c) 2012, 2018, 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. Oracle designates this |
| * particular file as subject to the "Classpath" exception as provided |
| * by Oracle in the LICENSE file that accompanied this code. |
| * |
| * 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. |
| */ |
| |
| package jdk.jfr.internal.instrument; |
| |
| import static jdk.internal.org.objectweb.asm.Opcodes.ACONST_NULL; |
| import static jdk.internal.org.objectweb.asm.Opcodes.ALOAD; |
| import static jdk.internal.org.objectweb.asm.Opcodes.INVOKESTATIC; |
| import static jdk.internal.org.objectweb.asm.Opcodes.RETURN; |
| import jdk.internal.org.objectweb.asm.MethodVisitor; |
| import jdk.internal.org.objectweb.asm.Opcodes; |
| |
| final class ConstructorWriter extends MethodVisitor { |
| |
| private boolean useInputParameter; |
| private String shortClassName; |
| private String fullClassName; |
| |
| ConstructorWriter(Class<?> classToChange, boolean useInputParameter) { |
| super(Opcodes.ASM5); |
| this.useInputParameter = useInputParameter; |
| shortClassName = classToChange.getSimpleName(); |
| fullClassName = classToChange.getName().replace('.', '/'); |
| } |
| |
| @Override |
| public void visitInsn(int opcode) |
| { |
| if (opcode == RETURN) { |
| if (useInputParameter) { |
| useInput(); |
| } else { |
| noInput(); |
| } |
| } |
| mv.visitInsn(opcode); |
| } |
| @SuppressWarnings("deprecation") |
| private void useInput() |
| { |
| //Load 'this' from local variable 0 |
| //Load first input parameter |
| //Invoke ThrowableTracer.traceCLASS(this, parameter) for current class |
| mv.visitVarInsn(ALOAD, 0); |
| mv.visitVarInsn(ALOAD, 1); |
| mv.visitMethodInsn(INVOKESTATIC, "jdk/jfr/internal/instrument/ThrowableTracer", |
| "trace" + shortClassName, "(L" + fullClassName + |
| ";Ljava/lang/String;)V"); |
| } |
| |
| @SuppressWarnings("deprecation") |
| private void noInput() |
| { |
| //Load 'this' from local variable 0 |
| //Load "" |
| //Invoke ThrowableTracer.traceCLASS(this, "") for current class |
| mv.visitVarInsn(ALOAD, 0); |
| mv.visitInsn(ACONST_NULL); |
| mv.visitMethodInsn(INVOKESTATIC, "jdk/jfr/internal/instrument/ThrowableTracer", |
| "trace" + shortClassName, "(L" + fullClassName + |
| ";Ljava/lang/String;)V"); |
| } |
| |
| public void setMethodVisitor(MethodVisitor mv) { |
| this.mv = mv; |
| } |
| } |