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49 lines
1.9 KiB
Java
49 lines
1.9 KiB
Java
/*
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* Copyright (c) 2012, 2025, 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.
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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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import java.lang.classfile.ClassFile;
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import java.lang.classfile.ClassTransform;
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import java.lang.classfile.CodeBuilder;
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import java.lang.classfile.CodeElement;
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import java.lang.classfile.CodeTransform;
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class Asmator {
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static byte[] fixup(byte[] buf) {
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return ClassFile.of().transformClass(ClassFile.of().parse(buf), ClassTransform.transformingMethodBodies(
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m -> m.methodName().equalsString("callme"),
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new CodeTransform() {
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@Override
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public void atStart(CodeBuilder builder) {
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// make receiver go dead!
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builder.aconst_null().astore(0);
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}
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@Override
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public void accept(CodeBuilder builder, CodeElement element) {
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builder.with(element); // pass through
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}
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}
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));
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}
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}
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