Mercurial > hg > graal-compiler
view graal/com.oracle.truffle.interop/src/com/oracle/truffle/interop/ForeignAccessArguments.java @ 21297:bea2f27524ba
Don't allow JFR byte code instrumentation to interfere with PEA
author | Tom Rodriguez <tom.rodriguez@oracle.com> |
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date | Mon, 11 May 2015 12:08:25 -0700 |
parents | ab451b6de9f8 |
children |
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/* * 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. 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 com.oracle.truffle.interop; import com.oracle.truffle.api.*; public final class ForeignAccessArguments { public static final Object[] EMPTY_ARGUMENTS_ARRAY = new Object[0]; public static final int RECEIVER_INDEX = 0; public static final int RUNTIME_ARGUMENT_COUNT = 1; public static Object[] create(Object receiver) { return new Object[]{receiver}; } public static Object[] create(Object receiver, Object[] arguments) { Object[] objectArguments = new Object[RUNTIME_ARGUMENT_COUNT + arguments.length]; objectArguments[RECEIVER_INDEX] = receiver; arraycopy(arguments, 0, objectArguments, RUNTIME_ARGUMENT_COUNT, arguments.length); return objectArguments; } public static Object getArgument(Object[] arguments, int index) { return arguments[RUNTIME_ARGUMENT_COUNT + index]; } public static Object getReceiver(Object[] arguments) { return arguments[RECEIVER_INDEX]; } public static Object[] extractUserArguments(Object[] arguments) { return copyOfRange(arguments, RUNTIME_ARGUMENT_COUNT, arguments.length); } public static Object[] extractUserArguments(int skip, Object[] arguments) { return copyOfRange(arguments, RUNTIME_ARGUMENT_COUNT + skip, arguments.length); } public static int getUserArgumentCount(Object[] arguments) { return arguments.length - RUNTIME_ARGUMENT_COUNT; } private static Object[] copyOfRange(Object[] original, int from, int to) { int newLength = to - from; if (newLength < 0) { CompilerDirectives.transferToInterpreter(); throw new IllegalArgumentException(from + " > " + to); } Object[] copy = new Object[newLength]; arraycopy(original, from, copy, 0, Math.min(original.length - from, newLength)); return copy; } private static void arraycopy(Object[] src, int srcPos, Object[] dest, int destPos, int length) { for (int i = 0; i < length; i++) { dest[destPos + i] = src[srcPos + i]; } } }