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.lir.test;
  24 
  25 import org.junit.Test;
  26 
  27 import org.graalvm.compiler.core.common.LIRKind;
  28 import org.graalvm.compiler.hotspot.HotSpotBackend;
  29 import org.graalvm.compiler.lir.framemap.FrameMapBuilder;
  30 import org.graalvm.compiler.lir.gen.LIRGeneratorTool;
  31 import org.graalvm.compiler.lir.jtt.LIRTest;
  32 import org.graalvm.compiler.lir.jtt.LIRTestSpecification;
  33 import org.graalvm.compiler.nodes.SafepointNode;
  34 import org.graalvm.compiler.nodes.graphbuilderconf.GraphBuilderConfiguration;
  35 import org.graalvm.compiler.nodes.graphbuilderconf.GraphBuilderContext;
  36 import org.graalvm.compiler.nodes.graphbuilderconf.InvocationPlugin;
  37 
  38 import jdk.vm.ci.code.BailoutException;
  39 import jdk.vm.ci.meta.AllocatableValue;
  40 import jdk.vm.ci.meta.JavaConstant;
  41 import jdk.vm.ci.meta.ResolvedJavaMethod;
  42 
  43 public class ExceedMaxOopMapStackOffset extends LIRTest {
  44 
  45     /**
  46      * Allocate lots of stacks slots and initialize them with a constant.
  47      */
  48     private static class WriteStackSlotsSpec extends LIRTestSpecification {
  49         private final JavaConstant constant;
  50 
  51         WriteStackSlotsSpec(JavaConstant constant) {
  52             this.constant = constant;
  53         }
  54 
  55         @Override
  56         public void generate(LIRGeneratorTool gen) {
  57             FrameMapBuilder frameMapBuilder = gen.getResult().getFrameMapBuilder();
  58             LIRKind lirKind = LIRKind.reference(gen.target().arch.getPlatformKind(constant.getJavaKind()));
  59             // create slots
  60             for (int i = 0; i < slots.length; i++) {
  61                 AllocatableValue src = gen.emitLoadConstant(lirKind, constant);
  62                 slots[i] = frameMapBuilder.allocateSpillSlot(lirKind);
  63                 gen.emitMove(slots[i], src);
  64             }
  65         }
  66     }
  67 
  68     /**
  69      * Read stacks slots and move their content into a blackhole.
  70      */
  71     private static class ReadStackSlotsSpec extends LIRTestSpecification {
  72 
  73         ReadStackSlotsSpec() {
  74         }
  75 
  76         @Override
  77         public void generate(LIRGeneratorTool gen) {
  78             for (int i = 0; i < slots.length; i++) {
  79                 gen.emitBlackhole(gen.emitMove(slots[i]));
  80             }
  81         }
  82     }
  83 
  84     @Override
  85     protected GraphBuilderConfiguration editGraphBuilderConfiguration(GraphBuilderConfiguration conf) {
  86         InvocationPlugin safepointPlugin = new InvocationPlugin() {
  87             @Override
  88             public boolean apply(GraphBuilderContext b, ResolvedJavaMethod targetMethod, Receiver receiver) {
  89                 b.add(new SafepointNode());
  90                 return true;
  91             }
  92         };
  93         conf.getPlugins().getInvocationPlugins().register(safepointPlugin, getClass(), "safepoint");
  94         return super.editGraphBuilderConfiguration(conf);
  95     }
  96 
  97     /*
  98      * Safepoint Snippet
  99      */
 100     private static void safepoint() {
 101     }
 102 
 103     private static AllocatableValue[] slots;
 104 
 105     private static final LIRTestSpecification readStackObjects = new ReadStackSlotsSpec();
 106 
 107     @SuppressWarnings("unused")
 108     @LIRIntrinsic
 109     public static void instrinsic(LIRTestSpecification spec) {
 110     }
 111 
 112     private static final LIRTestSpecification writeStackObjects = new WriteStackSlotsSpec(JavaConstant.NULL_POINTER);
 113 
 114     public void testStackObjects() {
 115         instrinsic(writeStackObjects);
 116         safepoint();
 117         instrinsic(readStackObjects);
 118     }
 119 
 120     @Test
 121     public void runStackObjects() throws Throwable {
 122         int max = ((HotSpotBackend) getBackend()).getRuntime().getVMConfig().maxOopMapStackOffset;
 123         if (max == Integer.MAX_VALUE) {
 124             max = 16 * 1024 - 64;
 125         }
 126         try {
 127             int numSlots = (max / 8) + 1;
 128             slots = new AllocatableValue[numSlots];
 129             runTest("testStackObjects");
 130         } catch (BailoutException e) {
 131             return;
 132         }
 133         fail("Expected exception BailoutException wasn't thrown");
 134     }
 135 }