1 /*
   2  * Copyright (c) 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 package org.graalvm.compiler.hotspot.replacements;
  26 
  27 import org.graalvm.compiler.api.replacements.ClassSubstitution;
  28 import org.graalvm.compiler.api.replacements.MethodSubstitution;
  29 import org.graalvm.compiler.core.common.spi.ForeignCallDescriptor;
  30 import org.graalvm.compiler.graph.Node.ConstantNodeParameter;
  31 import org.graalvm.compiler.graph.Node.NodeIntrinsic;
  32 import org.graalvm.compiler.hotspot.nodes.CurrentStackPointerNode;
  33 import org.graalvm.compiler.hotspot.nodes.StubForeignCallNode;
  34 import org.graalvm.compiler.nodes.extended.ForeignCallNode;
  35 import org.graalvm.compiler.word.Word;
  36 
  37 @ClassSubstitution(value = java.lang.Continuation.class)
  38 public class ContinuationSubstitutions {
  39     @MethodSubstitution(isStatic = true)
  40     public static long getSP() {
  41         Word stackPointer = CurrentStackPointerNode.get();
  42         return stackPointer.rawValue();
  43     }
  44 
  45     @MethodSubstitution(isStatic = true)
  46     public static int runLevel() {
  47         return 3;
  48     }
  49 
  50     public static final ForeignCallDescriptor CONTINUATION_DO_CONTINUE = new ForeignCallDescriptor("contomiaton_do_continue", void.class, Continuation.class);
  51     public static final ForeignCallDescriptor CONTINUATION_YIELD = new ForeignCallDescriptor("continuation_do_yield", int.class, int.class);
  52 }