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.replacements.profiling; 24 25 import static org.graalvm.compiler.hotspot.GraalHotSpotVMConfig.INJECTED_VMCONFIG; 26 import static org.graalvm.compiler.hotspot.replacements.HotSpotReplacementsUtil.config; 27 import static org.graalvm.compiler.nodes.extended.BranchProbabilityNode.SLOW_PATH_PROBABILITY; 28 import static org.graalvm.compiler.nodes.extended.BranchProbabilityNode.probability; 29 import static org.graalvm.compiler.replacements.SnippetTemplate.DEFAULT_REPLACER; 30 31 import org.graalvm.compiler.api.replacements.Snippet; 32 import org.graalvm.compiler.api.replacements.Snippet.ConstantParameter; 33 import org.graalvm.compiler.core.common.spi.ForeignCallDescriptor; 34 import org.graalvm.compiler.debug.GraalError; 35 import org.graalvm.compiler.graph.Node.ConstantNodeParameter; 36 import org.graalvm.compiler.graph.Node.NodeIntrinsic; 37 import org.graalvm.compiler.hotspot.HotSpotBackend; 38 import org.graalvm.compiler.hotspot.meta.HotSpotProviders; 39 import org.graalvm.compiler.hotspot.nodes.aot.LoadMethodCountersNode; 40 import org.graalvm.compiler.hotspot.nodes.profiling.ProfileBranchNode; 41 import org.graalvm.compiler.hotspot.nodes.profiling.ProfileInvokeNode; 42 import org.graalvm.compiler.hotspot.nodes.profiling.ProfileNode; 43 import org.graalvm.compiler.hotspot.word.MethodCountersPointer; 44 import org.graalvm.compiler.nodes.ConstantNode; 45 import org.graalvm.compiler.nodes.StructuredGraph; 46 import org.graalvm.compiler.nodes.extended.ForeignCallNode; 47 import org.graalvm.compiler.nodes.spi.LoweringTool; 48 import org.graalvm.compiler.nodes.util.GraphUtil; 49 import org.graalvm.compiler.replacements.SnippetTemplate; 50 import org.graalvm.compiler.replacements.SnippetTemplate.AbstractTemplates; 51 import org.graalvm.compiler.replacements.SnippetTemplate.Arguments; 52 import org.graalvm.compiler.replacements.SnippetTemplate.SnippetInfo; 53 import org.graalvm.compiler.replacements.Snippets; 54 55 import jdk.vm.ci.code.TargetDescription; 56 57 public class ProfileSnippets implements Snippets { 58 @NodeIntrinsic(ForeignCallNode.class) 59 public static native void methodInvocationEvent(@ConstantNodeParameter ForeignCallDescriptor descriptor, MethodCountersPointer counters); 60 61 @Snippet 62 public static void profileMethodEntry(MethodCountersPointer counters, @ConstantParameter int freqLog) { 63 int counterValue = counters.readInt(config(INJECTED_VMCONFIG).invocationCounterOffset) + config(INJECTED_VMCONFIG).invocationCounterIncrement; 64 counters.writeInt(config(INJECTED_VMCONFIG).invocationCounterOffset, counterValue); 65 if (freqLog >= 0) { 66 final int frequencyMask = (1 << freqLog) - 1; 67 if (probability(SLOW_PATH_PROBABILITY, (counterValue & (frequencyMask << config(INJECTED_VMCONFIG).invocationCounterShift)) == 0)) { 68 methodInvocationEvent(HotSpotBackend.INVOCATION_EVENT, counters); 69 } 70 } 71 } 72 73 @NodeIntrinsic(ForeignCallNode.class) 74 public static native void methodBackedgeEvent(@ConstantNodeParameter ForeignCallDescriptor descriptor, MethodCountersPointer counters, int bci, int targetBci); 75 76 @Snippet 77 public static void profileBackedge(MethodCountersPointer counters, @ConstantParameter int freqLog, int bci, int targetBci) { 78 int counterValue = counters.readInt(config(INJECTED_VMCONFIG).backedgeCounterOffset) + config(INJECTED_VMCONFIG).invocationCounterIncrement; 79 counters.writeInt(config(INJECTED_VMCONFIG).backedgeCounterOffset, counterValue); 80 final int frequencyMask = (1 << freqLog) - 1; 81 if (probability(SLOW_PATH_PROBABILITY, (counterValue & (frequencyMask << config(INJECTED_VMCONFIG).invocationCounterShift)) == 0)) { 82 methodBackedgeEvent(HotSpotBackend.BACKEDGE_EVENT, counters, bci, targetBci); 83 } 84 } 85 86 @Snippet 87 public static void profileConditionalBackedge(MethodCountersPointer counters, @ConstantParameter int freqLog, boolean branchCondition, int bci, int targetBci) { 88 if (branchCondition) { 89 profileBackedge(counters, freqLog, bci, targetBci); 90 } 91 } 92 93 public static class Templates extends AbstractTemplates { 94 private final SnippetInfo profileMethodEntry = snippet(ProfileSnippets.class, "profileMethodEntry"); 95 private final SnippetInfo profileBackedge = snippet(ProfileSnippets.class, "profileBackedge"); 96 private final SnippetInfo profileConditionalBackedge = snippet(ProfileSnippets.class, "profileConditionalBackedge"); 97 98 public Templates(HotSpotProviders providers, TargetDescription target) { 99 super(providers, providers.getSnippetReflection(), target); 100 } 101 102 public void lower(ProfileNode profileNode, LoweringTool tool) { 103 StructuredGraph graph = profileNode.graph(); 104 LoadMethodCountersNode counters = graph.unique(new LoadMethodCountersNode(profileNode.getProfiledMethod())); 105 106 if (profileNode instanceof ProfileBranchNode) { 107 // Backedge event 108 ProfileBranchNode profileBranchNode = (ProfileBranchNode) profileNode; 109 SnippetInfo snippet = profileBranchNode.hasCondition() ? profileConditionalBackedge : profileBackedge; 110 Arguments args = new Arguments(snippet, graph.getGuardsStage(), tool.getLoweringStage()); 111 ConstantNode bci = ConstantNode.forInt(profileBranchNode.bci(), graph); 112 ConstantNode targetBci = ConstantNode.forInt(profileBranchNode.targetBci(), graph); 113 args.add("counters", counters); 114 args.addConst("freqLog", profileBranchNode.getNotificationFreqLog()); 115 if (profileBranchNode.hasCondition()) { 116 args.add("branchCondition", profileBranchNode.branchCondition()); 117 } 118 args.add("bci", bci); 119 args.add("targetBci", targetBci); 120 121 SnippetTemplate template = template(args); 122 template.instantiate(providers.getMetaAccess(), profileNode, DEFAULT_REPLACER, args); 123 } else if (profileNode instanceof ProfileInvokeNode) { 124 ProfileInvokeNode profileInvokeNode = (ProfileInvokeNode) profileNode; 125 // Method invocation event 126 Arguments args = new Arguments(profileMethodEntry, graph.getGuardsStage(), tool.getLoweringStage()); 127 args.add("counters", counters); 128 args.addConst("freqLog", profileInvokeNode.getNotificationFreqLog()); 129 SnippetTemplate template = template(args); 130 template.instantiate(providers.getMetaAccess(), profileNode, DEFAULT_REPLACER, args); 131 } else { 132 throw new GraalError("Unsupported profile node type: " + profileNode); 133 } 134 135 assert profileNode.hasNoUsages(); 136 if (!profileNode.isDeleted()) { 137 GraphUtil.killWithUnusedFloatingInputs(profileNode); 138 } 139 } 140 } 141 }