1 /* 2 * Copyright (c) 2016, 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. 8 * 9 * This code is distributed in the hope that it will be useful, but WITHOUT 10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License 12 * version 2 for more details (a copy is included in the LICENSE file that 13 * accompanied this code). 14 * 15 * You should have received a copy of the GNU General Public License version 16 * 2 along with this work; if not, write to the Free Software Foundation, 17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. 18 * 19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA 20 * or visit www.oracle.com if you need additional information or have any 21 * questions. 22 */ 23 package org.graalvm.compiler.hotspot.stubs; 24 25 import org.graalvm.compiler.api.replacements.Snippet; 26 import org.graalvm.compiler.api.replacements.Snippet.ConstantParameter; 27 import org.graalvm.compiler.debug.GraalError; 28 import org.graalvm.compiler.hotspot.HotSpotForeignCallLinkage; 29 import org.graalvm.compiler.hotspot.meta.HotSpotProviders; 30 31 import jdk.vm.ci.code.Register; 32 33 /** 34 * Stub to allocate a {@link NullPointerException} thrown by a bytecode. 35 */ 36 public class NullPointerExceptionStub extends CreateExceptionStub { 37 38 public NullPointerExceptionStub(HotSpotProviders providers, HotSpotForeignCallLinkage linkage) { 39 super("createNullPointerException", providers, linkage); 40 } 41 42 @Override 43 protected Object getConstantParameterValue(int index, String name) { 44 GraalError.guarantee(index == 0, "unknown parameter %s at index %d", name, index); 45 return providers.getRegisters().getThreadRegister(); 46 } 47 48 @Snippet 49 private static Object createNullPointerException(@ConstantParameter Register threadRegister) { 50 return createException(threadRegister, NullPointerException.class); 51 } 52 }