1 /*

     2  * Copyright (c) 2013, 2018, Oracle and/or its affiliates. All rights reserved.

     3  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.

     4  *

     5  * This code is free software; you can redistribute it and/or modify it

     6  * under the terms of the GNU General Public License version 2 only, as

     7  * published by the Free Software Foundation.  Oracle designates this

     8  * particular file as subject to the "Classpath" exception as provided

     9  * by Oracle in the LICENSE file that accompanied this code.

    10  *

    11  * This code is distributed in the hope that it will be useful, but WITHOUT

    12  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or

    13  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License

    14  * version 2 for more details (a copy is included in the LICENSE file that

    15  * accompanied this code).

    16  *

    17  * You should have received a copy of the GNU General Public License version

    18  * 2 along with this work; if not, write to the Free Software Foundation,

    19  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.

    20  *

    21  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA

    22  * or visit www.oracle.com if you need additional information or have any

    23  * questions.

    24  */

    25 

    26 package jdk.jfr.internal.instrument;

    27 

    28 import jdk.internal.org.objectweb.asm.Label;

    29 import jdk.internal.org.objectweb.asm.Opcodes;

    30 import jdk.internal.org.objectweb.asm.Type;

    31 import jdk.internal.org.objectweb.asm.commons.LocalVariablesSorter;

    32 import jdk.internal.org.objectweb.asm.commons.Remapper;

    33 import jdk.internal.org.objectweb.asm.commons.RemappingMethodAdapter;

    34 

    35 @Deprecated

    36 final class JIMethodInliningAdapter extends RemappingMethodAdapter {

    37     private final LocalVariablesSorter lvs;

    38     private final Label end;

    39 

    40     public JIMethodInliningAdapter(LocalVariablesSorter mv, Label end, int acc, String desc, Remapper remapper) {

    41         super(acc, desc, mv, remapper);

    42         this.lvs = mv;

    43         this.end = end;

    44         int offset = isStatic(acc) ? 0 : 1;

    45         Type[] args = Type.getArgumentTypes(desc);

    46         for (int i = args.length - 1; i >= 0; i--) {

    47             super.visitVarInsn(args[i].getOpcode(Opcodes.ISTORE), i + offset);

    48         }

    49         if (offset > 0) {

    50             super.visitVarInsn(Opcodes.ASTORE, 0);

    51         }

    52     }

    53 

    54     private boolean isStatic(int acc) {

    55         return (acc & Opcodes.ACC_STATIC) != 0;

    56     }

    57 

    58     @Override

    59     public void visitInsn(int opcode) {

    60         if (opcode == Opcodes.RETURN || opcode == Opcodes.IRETURN

    61                 || opcode == Opcodes.ARETURN || opcode == Opcodes.LRETURN) {

    62             super.visitJumpInsn(Opcodes.GOTO, end);

    63         } else {

    64             super.visitInsn(opcode);

    65         }

    66     }

    67 

    68     @Override

    69     public void visitMaxs(int stack, int locals) {

    70     }

    71 

    72     @Override

    73     protected int newLocalMapping(Type type) {

    74         return lvs.newLocal(type);

    75     }

    76 }