1 /*
2 * Copyright (c) 2015, 2019, 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
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 }
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1 /*
2 * Copyright (c) 2015, 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.
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
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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