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 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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 * This code is free software; you can redistribute it and/or modify it
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 * published by the Free Software Foundation.
 *
 * 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).
 *
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 * 2 along with this work; if not, write to the Free Software Foundation,
 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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package org.graalvm.compiler.hotspot.replacements;

import static org.graalvm.compiler.hotspot.GraalHotSpotVMConfig.INJECTED_VMCONFIG;
import static org.graalvm.compiler.nodes.extended.BranchProbabilityNode.SLOW_PATH_PROBABILITY;
import static org.graalvm.compiler.nodes.extended.BranchProbabilityNode.probability;

import jdk.vm.ci.meta.DeoptimizationAction;
import jdk.vm.ci.meta.DeoptimizationReason;
import jdk.vm.ci.meta.JavaKind;
import org.graalvm.compiler.api.replacements.ClassSubstitution;
import org.graalvm.compiler.api.replacements.MethodSubstitution;
import org.graalvm.compiler.nodes.DeoptimizeNode;
import org.graalvm.compiler.nodes.java.NewArrayNode;
import org.graalvm.compiler.replacements.arraycopy.ArrayCopyCallNode;

// JaCoCo Exclude

Substitutions for StringUTF16 methods for JDK9 and later.
/** * Substitutions for {@code StringUTF16} methods for JDK9 and later. */
@ClassSubstitution(className = "java.lang.StringUTF16", optional = true) public class StringUTF16Substitutions { private static final int MAX_LENGTH = Integer.MAX_VALUE >> 1; @MethodSubstitution public static byte[] toBytes(char[] value, int srcBegin, int length) { if (probability(SLOW_PATH_PROBABILITY, srcBegin < 0) || probability(SLOW_PATH_PROBABILITY, length < 0) || probability(SLOW_PATH_PROBABILITY, length > MAX_LENGTH) || probability(SLOW_PATH_PROBABILITY, srcBegin > value.length - length)) { DeoptimizeNode.deopt(DeoptimizationAction.None, DeoptimizationReason.BoundsCheckException); } byte[] val = (byte[]) NewArrayNode.newUninitializedArray(Byte.TYPE, length << 1); // the intrinsic does not perform bounds/type checks, so it can be used here. ArrayCopyCallNode.disjointArraycopyKillsInit(value, srcBegin, val, 0, length, JavaKind.Char, HotSpotReplacementsUtil.getHeapWordSize(INJECTED_VMCONFIG)); return val; } @MethodSubstitution public static void getChars(byte[] value, int srcBegin, int srcEnd, char[] dst, int dstBegin) { int length = srcEnd - srcBegin; if (probability(SLOW_PATH_PROBABILITY, srcBegin < 0) || probability(SLOW_PATH_PROBABILITY, length < 0) || probability(SLOW_PATH_PROBABILITY, srcBegin > (value.length >> 1) - length) || probability(SLOW_PATH_PROBABILITY, dstBegin > dst.length - length)) { DeoptimizeNode.deopt(DeoptimizationAction.None, DeoptimizationReason.BoundsCheckException); } // The intrinsic does not perform bounds/type checks, so it can be used here. ArrayCopyCallNode.disjointArraycopyDifferentKinds(value, srcBegin, dst, dstBegin, length, JavaKind.Char, JavaKind.Byte, JavaKind.Char, HotSpotReplacementsUtil.getHeapWordSize(INJECTED_VMCONFIG)); } }