90 lines
3.3 KiB
Java
90 lines
3.3 KiB
Java
/*
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* Copyright (c) 2012, 2018, Oracle and/or its affiliates. All rights reserved.
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* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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*
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* This code is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License version 2 only, as
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* published by the Free Software Foundation. Oracle designates this
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* particular file as subject to the "Classpath" exception as provided
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* by Oracle in the LICENSE file that accompanied this code.
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*
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* This code is distributed in the hope that it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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* version 2 for more details (a copy is included in the LICENSE file that
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* accompanied this code).
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*
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* You should have received a copy of the GNU General Public License version
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* 2 along with this work; if not, write to the Free Software Foundation,
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* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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*
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* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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* or visit www.oracle.com if you need additional information or have any
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* questions.
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*/
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package jdk.jfr.internal.instrument;
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import static jdk.internal.org.objectweb.asm.Opcodes.ACONST_NULL;
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import static jdk.internal.org.objectweb.asm.Opcodes.ALOAD;
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import static jdk.internal.org.objectweb.asm.Opcodes.INVOKESTATIC;
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import static jdk.internal.org.objectweb.asm.Opcodes.RETURN;
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import jdk.internal.org.objectweb.asm.MethodVisitor;
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import jdk.internal.org.objectweb.asm.Opcodes;
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final class ConstructorWriter extends MethodVisitor {
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private boolean useInputParameter;
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private String shortClassName;
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private String fullClassName;
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ConstructorWriter(Class<?> classToChange, boolean useInputParameter) {
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super(Opcodes.ASM5);
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this.useInputParameter = useInputParameter;
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shortClassName = classToChange.getSimpleName();
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fullClassName = classToChange.getName().replace('.', '/');
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}
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@Override
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public void visitInsn(int opcode)
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{
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if (opcode == RETURN) {
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if (useInputParameter) {
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useInput();
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} else {
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noInput();
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}
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}
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mv.visitInsn(opcode);
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}
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@SuppressWarnings("deprecation")
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private void useInput()
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{
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//Load 'this' from local variable 0
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//Load first input parameter
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//Invoke ThrowableTracer.traceCLASS(this, parameter) for current class
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mv.visitVarInsn(ALOAD, 0);
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mv.visitVarInsn(ALOAD, 1);
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mv.visitMethodInsn(INVOKESTATIC, "jdk/jfr/internal/instrument/ThrowableTracer",
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"trace" + shortClassName, "(L" + fullClassName +
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";Ljava/lang/String;)V");
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}
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@SuppressWarnings("deprecation")
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private void noInput()
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{
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//Load 'this' from local variable 0
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//Load ""
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//Invoke ThrowableTracer.traceCLASS(this, "") for current class
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mv.visitVarInsn(ALOAD, 0);
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mv.visitInsn(ACONST_NULL);
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mv.visitMethodInsn(INVOKESTATIC, "jdk/jfr/internal/instrument/ThrowableTracer",
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"trace" + shortClassName, "(L" + fullClassName +
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";Ljava/lang/String;)V");
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}
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public void setMethodVisitor(MethodVisitor mv) {
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this.mv = mv;
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}
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}
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