Mercurial > hg > truffle
view agent/src/share/classes/sun/jvm/hotspot/jdi/LocationImpl.java @ 19491:4d66c000d253
Truffle/Instrumentation: more cleanup in Probe
author | Michael Van De Vanter <michael.van.de.vanter@oracle.com> |
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date | Wed, 18 Feb 2015 18:30:49 -0800 |
parents | 37be97a58393 |
children |
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/* * Copyright (c) 2002, 2011, 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 sun.jvm.hotspot.jdi; import com.sun.jdi.*; import java.util.*; public class LocationImpl extends MirrorImpl implements Location { private final ReferenceTypeImpl declaringType; private Method method; private sun.jvm.hotspot.oops.Method methodRef; private long codeIndex; private LineInfo baseLineInfo = null; private LineInfo otherLineInfo = null; LocationImpl(VirtualMachine vm, Method method, long codeIndex) { super(vm); this.method = method; this.codeIndex = method.isNative()? -1 : codeIndex; this.declaringType = (ReferenceTypeImpl)method.declaringType(); } /* * This constructor allows lazy creation of the method mirror. This * can be a performance savings if the method mirror does not yet * exist. */ LocationImpl(VirtualMachine vm, ReferenceType declaringType, sun.jvm.hotspot.oops.Method methodRef, long codeIndex) { super(vm); this.method = null; this.codeIndex = codeIndex; this.declaringType = (ReferenceTypeImpl)declaringType; this.methodRef = methodRef; } public boolean equals(Object obj) { if ((obj != null) && (obj instanceof Location)) { Location other = (Location)obj; return (method().equals(other.method())) && (codeIndex() == other.codeIndex()) && super.equals(obj); } else { return false; } } public int hashCode() { /* * TO DO: better hash code? */ return method().hashCode() + (int)codeIndex(); } public int compareTo(Location other) { int rc = method().compareTo(other.method()); if (rc == 0) { long diff = codeIndex() - other.codeIndex(); if (diff < 0) return -1; else if (diff > 0) return 1; else return 0; } return rc; } public ReferenceType declaringType() { return declaringType; } public Method method() { if (method == null) { method = declaringType.getMethodMirror(methodRef); if (method.isNative()) { codeIndex = -1; } } return method; } public long codeIndex() { method(); // be sure information is up-to-date return codeIndex; } LineInfo getBaseLineInfo(SDE.Stratum stratum) { LineInfo lineInfo; /* check if there is cached info to use */ if (baseLineInfo != null) { return baseLineInfo; } /* compute the line info */ MethodImpl methodImpl = (MethodImpl)method(); lineInfo = methodImpl.codeIndexToLineInfo(stratum, codeIndex()); /* cache it */ addBaseLineInfo(lineInfo); return lineInfo; } LineInfo getLineInfo(SDE.Stratum stratum) { LineInfo lineInfo; /* base stratum is done slighly differently */ if (stratum.isJava()) { return getBaseLineInfo(stratum); } /* check if there is cached info to use */ lineInfo = otherLineInfo; // copy because of concurrency if (lineInfo != null && stratum.id().equals(lineInfo.liStratum())) { return lineInfo; } int baseLineNumber = lineNumber(SDE.BASE_STRATUM_NAME); SDE.LineStratum lineStratum = stratum.lineStratum(declaringType, baseLineNumber); if (lineStratum != null && lineStratum.lineNumber() != -1) { lineInfo = new StratumLineInfo(stratum.id(), lineStratum.lineNumber(), lineStratum.sourceName(), lineStratum.sourcePath()); } else { /* find best match */ MethodImpl methodImpl = (MethodImpl)method(); lineInfo = methodImpl.codeIndexToLineInfo(stratum, codeIndex()); } /* cache it */ addStratumLineInfo(lineInfo); return lineInfo; } void addStratumLineInfo(LineInfo lineInfo) { otherLineInfo = lineInfo; } void addBaseLineInfo(LineInfo lineInfo) { baseLineInfo = lineInfo; } public String sourceName() throws AbsentInformationException { return sourceName(vm.getDefaultStratum()); } public String sourceName(String stratumID) throws AbsentInformationException { return sourceName(declaringType.stratum(stratumID)); } String sourceName(SDE.Stratum stratum) throws AbsentInformationException { return getLineInfo(stratum).liSourceName(); } public String sourcePath() throws AbsentInformationException { return sourcePath(vm.getDefaultStratum()); } public String sourcePath(String stratumID) throws AbsentInformationException { return sourcePath(declaringType.stratum(stratumID)); } String sourcePath(SDE.Stratum stratum) throws AbsentInformationException { return getLineInfo(stratum).liSourcePath(); } public int lineNumber() { return lineNumber(vm.getDefaultStratum()); } public int lineNumber(String stratumID) { return lineNumber(declaringType.stratum(stratumID)); } int lineNumber(SDE.Stratum stratum) { return getLineInfo(stratum).liLineNumber(); } public String toString() { if (lineNumber() == -1) { return method().toString() + "+" + codeIndex(); } else { return declaringType().name() + ":" + lineNumber(); } } }