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src/jdk.internal.vm.compiler/share/classes/org.graalvm.compiler.hotspot/src/org/graalvm/compiler/hotspot/meta/HotSpotNodePlugin.java

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  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 
  24 
  25 package org.graalvm.compiler.hotspot.meta;
  26 
  27 import static jdk.vm.ci.meta.DeoptimizationAction.None;
  28 import static jdk.vm.ci.meta.DeoptimizationReason.TransferToInterpreter;
  29 import static org.graalvm.compiler.core.common.GraalOptions.ImmutableCode;
  30 


  31 import org.graalvm.compiler.core.common.CompilationIdentifier;
  32 import org.graalvm.compiler.core.common.type.StampFactory;
  33 import org.graalvm.compiler.core.common.type.StampPair;
  34 import org.graalvm.compiler.hotspot.GraalHotSpotVMConfig;
  35 import org.graalvm.compiler.hotspot.HotSpotCompilationIdentifier;
  36 import org.graalvm.compiler.hotspot.nodes.CurrentJavaThreadNode;
  37 import org.graalvm.compiler.hotspot.word.HotSpotWordTypes;
  38 import org.graalvm.compiler.nodes.ConstantNode;
  39 import org.graalvm.compiler.nodes.FixedGuardNode;
  40 import org.graalvm.compiler.nodes.FixedWithNextNode;
  41 import org.graalvm.compiler.nodes.LogicNode;
  42 import org.graalvm.compiler.nodes.NamedLocationIdentity;
  43 import org.graalvm.compiler.nodes.StructuredGraph;
  44 import org.graalvm.compiler.nodes.ValueNode;
  45 import org.graalvm.compiler.nodes.calc.IntegerEqualsNode;
  46 import org.graalvm.compiler.nodes.extended.GuardingNode;
  47 import org.graalvm.compiler.nodes.graphbuilderconf.GraphBuilderContext;
  48 import org.graalvm.compiler.nodes.graphbuilderconf.GraphBuilderTool;
  49 import org.graalvm.compiler.nodes.graphbuilderconf.InlineInvokePlugin;
  50 import org.graalvm.compiler.nodes.graphbuilderconf.NodePlugin;
  51 import org.graalvm.compiler.nodes.graphbuilderconf.TypePlugin;
  52 import org.graalvm.compiler.nodes.memory.HeapAccess.BarrierType;
  53 import org.graalvm.compiler.nodes.memory.ReadNode;
  54 import org.graalvm.compiler.nodes.memory.address.AddressNode;
  55 import org.graalvm.compiler.nodes.memory.address.OffsetAddressNode;
  56 import org.graalvm.compiler.nodes.util.ConstantFoldUtil;
  57 import org.graalvm.compiler.word.Word;
  58 import org.graalvm.compiler.word.WordOperationPlugin;
  59 import jdk.internal.vm.compiler.word.LocationIdentity;
  60 
  61 import jdk.vm.ci.hotspot.HotSpotCompilationRequest;
  62 import jdk.vm.ci.meta.JavaConstant;
  63 import jdk.vm.ci.meta.JavaKind;
  64 import jdk.vm.ci.meta.JavaType;
  65 import jdk.vm.ci.meta.JavaTypeProfile;
  66 import jdk.vm.ci.meta.ResolvedJavaField;
  67 import jdk.vm.ci.meta.ResolvedJavaMethod;
  68 import jdk.vm.ci.meta.ResolvedJavaType;
  69 
  70 import java.lang.reflect.Field;
  71 import sun.misc.Unsafe;
  72 
  73 /**
  74  * This plugin does HotSpot-specific customization of bytecode parsing:
  75  * <ul>
  76  * <li>{@link Word}-type rewriting for {@link GraphBuilderContext#parsingIntrinsic intrinsic}
  77  * functions (snippets and method substitutions), by forwarding to the {@link WordOperationPlugin}.
  78  * Note that we forward the {@link NodePlugin} and {@link TypePlugin} methods, but not the
  79  * {@link InlineInvokePlugin} methods implemented by {@link WordOperationPlugin}. The latter is not
  80  * necessary because HotSpot only uses the {@link Word} type in methods that are force-inlined,
  81  * i.e., there are never non-inlined invokes that involve the {@link Word} type.</li>
  82  * <li>Constant folding of field loads.</li>
  83  * </ul>
  84  */
  85 public final class HotSpotNodePlugin implements NodePlugin, TypePlugin {
  86     protected final WordOperationPlugin wordOperationPlugin;
  87     private final GraalHotSpotVMConfig config;
  88     private final HotSpotWordTypes wordTypes;
  89 
  90     public HotSpotNodePlugin(WordOperationPlugin wordOperationPlugin, GraalHotSpotVMConfig config, HotSpotWordTypes wordTypes) {


 226                         // if we actually need to report exception events for the current
 227                         // thread. If not, take the fast path otherwise deoptimize.
 228                         CurrentJavaThreadNode thread = graph.unique(new CurrentJavaThreadNode(wordTypes.getWordKind()));
 229                         ValueNode offset = graph.unique(ConstantNode.forLong(config.javaThreadShouldPostOnExceptionsFlagOffset));
 230                         AddressNode address = graph.unique(new OffsetAddressNode(thread, offset));
 231                         ReadNode shouldPostException = graph.add(new ReadNode(address, JAVA_THREAD_SHOULD_POST_ON_EXCEPTIONS_FLAG_LOCATION, StampFactory.intValue(), BarrierType.NONE));
 232                         afterExceptionLoaded.setNext(shouldPostException);
 233                         ValueNode zero = graph.unique(ConstantNode.forInt(0));
 234                         LogicNode cond = graph.unique(new IntegerEqualsNode(shouldPostException, zero));
 235                         FixedGuardNode check = graph.add(new FixedGuardNode(cond, TransferToInterpreter, None, false));
 236                         shouldPostException.setNext(check);
 237                         return check;
 238                     }
 239                 }
 240             }
 241         }
 242         return afterExceptionLoaded;
 243     }
 244 
 245     private static final LocationIdentity JAVA_THREAD_SHOULD_POST_ON_EXCEPTIONS_FLAG_LOCATION = NamedLocationIdentity.mutable("JavaThread::_should_post_on_exceptions_flag");

 246 
 247     private static final Unsafe UNSAFE = initUnsafe();
 248 
 249     private static Unsafe initUnsafe() {
 250         try {
 251             // Fast path when we are trusted.
 252             return Unsafe.getUnsafe();
 253         } catch (SecurityException se) {
 254             // Slow path when we are not trusted.
 255             try {
 256                 Field theUnsafe = Unsafe.class.getDeclaredField("theUnsafe");
 257                 theUnsafe.setAccessible(true);
 258                 return (Unsafe) theUnsafe.get(Unsafe.class);
 259             } catch (Exception e) {
 260                 throw new RuntimeException("exception while trying to get Unsafe", e);
 261             }
 262         }
 263     }
 264 }


  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 
  24 
  25 package org.graalvm.compiler.hotspot.meta;
  26 
  27 import static jdk.vm.ci.meta.DeoptimizationAction.None;
  28 import static jdk.vm.ci.meta.DeoptimizationReason.TransferToInterpreter;
  29 import static org.graalvm.compiler.core.common.GraalOptions.ImmutableCode;
  30 
  31 import java.lang.reflect.Field;
  32 
  33 import org.graalvm.compiler.core.common.CompilationIdentifier;
  34 import org.graalvm.compiler.core.common.type.StampFactory;
  35 import org.graalvm.compiler.core.common.type.StampPair;
  36 import org.graalvm.compiler.hotspot.GraalHotSpotVMConfig;
  37 import org.graalvm.compiler.hotspot.HotSpotCompilationIdentifier;
  38 import org.graalvm.compiler.hotspot.nodes.CurrentJavaThreadNode;
  39 import org.graalvm.compiler.hotspot.word.HotSpotWordTypes;
  40 import org.graalvm.compiler.nodes.ConstantNode;
  41 import org.graalvm.compiler.nodes.FixedGuardNode;
  42 import org.graalvm.compiler.nodes.FixedWithNextNode;
  43 import org.graalvm.compiler.nodes.LogicNode;
  44 import org.graalvm.compiler.nodes.NamedLocationIdentity;
  45 import org.graalvm.compiler.nodes.StructuredGraph;
  46 import org.graalvm.compiler.nodes.ValueNode;
  47 import org.graalvm.compiler.nodes.calc.IntegerEqualsNode;
  48 import org.graalvm.compiler.nodes.extended.GuardingNode;
  49 import org.graalvm.compiler.nodes.graphbuilderconf.GraphBuilderContext;
  50 import org.graalvm.compiler.nodes.graphbuilderconf.GraphBuilderTool;
  51 import org.graalvm.compiler.nodes.graphbuilderconf.InlineInvokePlugin;
  52 import org.graalvm.compiler.nodes.graphbuilderconf.NodePlugin;
  53 import org.graalvm.compiler.nodes.graphbuilderconf.TypePlugin;
  54 import org.graalvm.compiler.nodes.memory.HeapAccess.BarrierType;
  55 import org.graalvm.compiler.nodes.memory.ReadNode;
  56 import org.graalvm.compiler.nodes.memory.address.AddressNode;
  57 import org.graalvm.compiler.nodes.memory.address.OffsetAddressNode;
  58 import org.graalvm.compiler.nodes.util.ConstantFoldUtil;
  59 import org.graalvm.compiler.word.Word;
  60 import org.graalvm.compiler.word.WordOperationPlugin;
  61 import jdk.internal.vm.compiler.word.LocationIdentity;
  62 
  63 import jdk.vm.ci.hotspot.HotSpotCompilationRequest;
  64 import jdk.vm.ci.meta.JavaConstant;
  65 import jdk.vm.ci.meta.JavaKind;
  66 import jdk.vm.ci.meta.JavaType;
  67 import jdk.vm.ci.meta.JavaTypeProfile;
  68 import jdk.vm.ci.meta.ResolvedJavaField;
  69 import jdk.vm.ci.meta.ResolvedJavaMethod;
  70 import jdk.vm.ci.meta.ResolvedJavaType;


  71 import sun.misc.Unsafe;
  72 
  73 /**
  74  * This plugin does HotSpot-specific customization of bytecode parsing:
  75  * <ul>
  76  * <li>{@link Word}-type rewriting for {@link GraphBuilderContext#parsingIntrinsic intrinsic}
  77  * functions (snippets and method substitutions), by forwarding to the {@link WordOperationPlugin}.
  78  * Note that we forward the {@link NodePlugin} and {@link TypePlugin} methods, but not the
  79  * {@link InlineInvokePlugin} methods implemented by {@link WordOperationPlugin}. The latter is not
  80  * necessary because HotSpot only uses the {@link Word} type in methods that are force-inlined,
  81  * i.e., there are never non-inlined invokes that involve the {@link Word} type.</li>
  82  * <li>Constant folding of field loads.</li>
  83  * </ul>
  84  */
  85 public final class HotSpotNodePlugin implements NodePlugin, TypePlugin {
  86     protected final WordOperationPlugin wordOperationPlugin;
  87     private final GraalHotSpotVMConfig config;
  88     private final HotSpotWordTypes wordTypes;
  89 
  90     public HotSpotNodePlugin(WordOperationPlugin wordOperationPlugin, GraalHotSpotVMConfig config, HotSpotWordTypes wordTypes) {


 226                         // if we actually need to report exception events for the current
 227                         // thread. If not, take the fast path otherwise deoptimize.
 228                         CurrentJavaThreadNode thread = graph.unique(new CurrentJavaThreadNode(wordTypes.getWordKind()));
 229                         ValueNode offset = graph.unique(ConstantNode.forLong(config.javaThreadShouldPostOnExceptionsFlagOffset));
 230                         AddressNode address = graph.unique(new OffsetAddressNode(thread, offset));
 231                         ReadNode shouldPostException = graph.add(new ReadNode(address, JAVA_THREAD_SHOULD_POST_ON_EXCEPTIONS_FLAG_LOCATION, StampFactory.intValue(), BarrierType.NONE));
 232                         afterExceptionLoaded.setNext(shouldPostException);
 233                         ValueNode zero = graph.unique(ConstantNode.forInt(0));
 234                         LogicNode cond = graph.unique(new IntegerEqualsNode(shouldPostException, zero));
 235                         FixedGuardNode check = graph.add(new FixedGuardNode(cond, TransferToInterpreter, None, false));
 236                         shouldPostException.setNext(check);
 237                         return check;
 238                     }
 239                 }
 240             }
 241         }
 242         return afterExceptionLoaded;
 243     }
 244 
 245     private static final LocationIdentity JAVA_THREAD_SHOULD_POST_ON_EXCEPTIONS_FLAG_LOCATION = NamedLocationIdentity.mutable("JavaThread::_should_post_on_exceptions_flag");
 246     static final Unsafe UNSAFE = initUnsafe();
 247 
 248     static Unsafe initUnsafe() {


 249         try {
 250             // Fast path when we are trusted.
 251             return Unsafe.getUnsafe();
 252         } catch (SecurityException se) {
 253             // Slow path when we are not trusted.
 254             try {
 255                 Field theUnsafe = Unsafe.class.getDeclaredField("theUnsafe");
 256                 theUnsafe.setAccessible(true);
 257                 return (Unsafe) theUnsafe.get(Unsafe.class);
 258             } catch (Exception e) {
 259                 throw new RuntimeException("exception while trying to get Unsafe", e);
 260             }
 261         }
 262     }
 263 }
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