Mercurial > hg > graal-jvmci-8
view jvmci/jdk.vm.ci.hotspot/src/jdk/vm/ci/hotspot/HotSpotMethodDataAccessor.java @ 23781:276858bc6ac6
recast "JVMCI flags" language to "JVMCI system properties"
author | Doug Simon <doug.simon@oracle.com> |
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date | Wed, 05 Oct 2016 17:30:21 +0200 |
parents | a52d7039723b |
children |
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/* * Copyright (c) 2012, Oracle and/or its affiliates. All rights reserved. * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. * * This code is free software; you can redistribute it and/or modify it * under the terms of the GNU General Public License version 2 only, as * published by the Free Software Foundation. * * This code is distributed in the hope that it will be useful, but WITHOUT * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License * version 2 for more details (a copy is included in the LICENSE file that * accompanied this code). * * You should have received a copy of the GNU General Public License version * 2 along with this work; if not, write to the Free Software Foundation, * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. * * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA * or visit www.oracle.com if you need additional information or have any * questions. */ package jdk.vm.ci.hotspot; import jdk.vm.ci.meta.JavaMethodProfile; import jdk.vm.ci.meta.JavaTypeProfile; import jdk.vm.ci.meta.ProfilingInfo; import jdk.vm.ci.meta.TriState; /** * Base class for accessing the different kinds of data in a HotSpot {@code MethodData}. This is * similar to {@link ProfilingInfo}, but most methods require a {@link HotSpotMethodData} and the * exact position within the method data. */ abstract class HotSpotMethodDataAccessor { final int tag; final int staticSize; final HotSpotVMConfig config; protected HotSpotMethodDataAccessor(HotSpotVMConfig config, int tag, int staticSize) { this.config = config; this.tag = tag; this.staticSize = staticSize; } /** * Returns the tag stored in the LayoutData header. * * @return tag stored in the LayoutData header */ int getTag() { return tag; } static int readTag(HotSpotVMConfig config, HotSpotMethodData data, int position) { final int tag = data.readUnsignedByte(position, config.dataLayoutTagOffset); assert tag >= config.dataLayoutNoTag && tag <= config.dataLayoutSpeculativeTrapDataTag : "profile data tag out of bounds: " + tag; return tag; } /** * Returns the BCI stored in the LayoutData header. * * @return an integer between 0 and {@link Short#MAX_VALUE} inclusive, or -1 if not supported */ int getBCI(HotSpotMethodData data, int position) { return data.readUnsignedShort(position, config.dataLayoutBCIOffset); } /** * Computes the size for the specific data at the given position. * * @return a value greater than 0 */ final int getSize(HotSpotMethodData data, int position) { int size = staticSize + getDynamicSize(data, position); // Sanity check against VM int vmSize = HotSpotJVMCIRuntime.runtime().compilerToVm.methodDataProfileDataSize(data.metaspaceMethodData, position); assert size == vmSize : size + " != " + vmSize; return size; } TriState getExceptionSeen(HotSpotMethodData data, int position) { final int exceptionsMask = 1 << config.bitDataExceptionSeenFlag; return TriState.get((getFlags(data, position) & exceptionsMask) != 0); } /** * @param data * @param position */ JavaTypeProfile getTypeProfile(HotSpotMethodData data, int position) { return null; } /** * @param data * @param position */ JavaMethodProfile getMethodProfile(HotSpotMethodData data, int position) { return null; } /** * @param data * @param position */ double getBranchTakenProbability(HotSpotMethodData data, int position) { return -1; } /** * @param data * @param position */ double[] getSwitchProbabilities(HotSpotMethodData data, int position) { return null; } /** * @param data * @param position */ int getExecutionCount(HotSpotMethodData data, int position) { return -1; } /** * @param data * @param position */ TriState getNullSeen(HotSpotMethodData data, int position) { return TriState.UNKNOWN; } protected int getFlags(HotSpotMethodData data, int position) { return data.readUnsignedByte(position, config.dataLayoutFlagsOffset); } /** * @param data * @param position */ protected int getDynamicSize(HotSpotMethodData data, int position) { return 0; } abstract StringBuilder appendTo(StringBuilder sb, HotSpotMethodData data, int pos); }