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/*
* Copyright (c) 2002, 2003, 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(Object object) {
LocationImpl other = (LocationImpl)object;
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();
}
}
}
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