/*******************************************************************************
* Copyright (c) 2000, 2015 IBM Corporation and others.
* All rights reserved. This program and the accompanying materials
* are made available under the terms of the Eclipse Public License v1.0
* which accompanies this distribution, and is available at
* http://www.eclipse.org/legal/epl-v10.html
*
* Contributors:
* IBM Corporation - initial API and implementation
* Tim Tromey - update method signature syntax (bug 31507)
*******************************************************************************/
package org.eclipse.jdi.internal;
import java.io.ByteArrayOutputStream;
import java.io.DataInputStream;
import java.io.DataOutputStream;
import java.io.IOException;
import java.lang.reflect.Field;
import java.lang.reflect.Modifier;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.Collections;
import java.util.HashMap;
import java.util.Iterator;
import java.util.List;
import java.util.Map;
import java.util.Set;
import java.util.TreeSet;
import org.eclipse.jdi.internal.jdwp.JdwpCommandPacket;
import org.eclipse.jdi.internal.jdwp.JdwpMethodID;
import org.eclipse.jdi.internal.jdwp.JdwpReplyPacket;
import com.ibm.icu.text.MessageFormat;
import com.sun.jdi.AbsentInformationException;
import com.sun.jdi.ClassLoaderReference;
import com.sun.jdi.ClassNotLoadedException;
import com.sun.jdi.LocalVariable;
import com.sun.jdi.Locatable;
import com.sun.jdi.Location;
import com.sun.jdi.Method;
import com.sun.jdi.Type;
/**
* Implementation of com.sun.jdi.Method.
*/
public class MethodImpl extends TypeComponentImpl implements Method, Locatable {
/** InvokeOptions Constants. */
public static final int INVOKE_SINGLE_THREADED_JDWP = 0x01;
public static final int INVOKE_NONVIRTUAL_JDWP = 0x02;
/** Map with Strings for flag bits. */
private static String[] fgInvokeOptions = null;
/** MethodTypeID that corresponds to this reference. */
private JdwpMethodID fMethodID;
/** The following are the stored results of JDWP calls. */
private List<LocalVariable> fVariables = null;
private long fLowestValidCodeIndex = -1;
private long fHighestValidCodeIndex = -1;
private Map<Long, Integer> fCodeIndexToLine = null;
private Map<Integer, List<Long>> fLineToCodeIndexes = null;
private Map<String, Map<String, List<Location>>> fStratumAllLineLocations = null;
private int fArgumentSlotsCount = -1;
private List<LocalVariable> fArguments = null;
private List<Type> fArgumentTypes = null;
private List<String> fArgumentTypeNames = null;
private List<String> fArgumentTypeSignatures = null;
private byte[] fByteCodes = null;
private long[] fCodeIndexTable;
private int[] fJavaStratumLineNumberTable;
private String fReturnTypeName = null;
/**
* Creates new MethodImpl.
*/
public MethodImpl(VirtualMachineImpl vmImpl,
ReferenceTypeImpl declaringType, JdwpMethodID methodID,
String name, String signature, String genericSignature,
int modifierBits) {
super(
"Method", vmImpl, declaringType, name, signature, genericSignature, modifierBits); //$NON-NLS-1$
fMethodID = methodID;
}
/**
* Flushes all stored Jdwp results.
*/
protected void flushStoredJdwpResults() {
fVariables = null;
fLowestValidCodeIndex = -1;
fHighestValidCodeIndex = -1;
fCodeIndexToLine = null;
fLineToCodeIndexes = null;
fStratumAllLineLocations = null;
fCodeIndexTable = null;
fJavaStratumLineNumberTable = null;
fArgumentSlotsCount = -1;
fArguments = null;
fArgumentTypes = null;
fArgumentTypeNames = null;
fArgumentTypeSignatures = null;
fByteCodes = null;
}
/**
* @return Returns methodID of method.
*/
protected JdwpMethodID getMethodID() {
return fMethodID;
}
/**
* @return Returns map of location to line number.
*/
protected Map<Long, Integer> javaStratumCodeIndexToLine()
throws AbsentInformationException {
if (isAbstract()) {
return Collections.EMPTY_MAP;
}
getLineTable();
return fCodeIndexToLine;
}
/**
* @return Returns map of line number to locations.
*/
protected List<Long> javaStratumLineToCodeIndexes(int line) throws AbsentInformationException {
if (isAbstract() || isNative()) {
return null;
}
getLineTable();
return fLineToCodeIndexes.get(new Integer(line));
}
/**
* Gets line table from VM.
*/
private void getLineTable() throws AbsentInformationException {
if (isObsolete()) {
return;
}
if (fCodeIndexToLine != null) {
if (fCodeIndexToLine.isEmpty()) {
throw new AbsentInformationException(
JDIMessages.MethodImpl_Got_empty_line_number_table_for_this_method_1);
}
return;
}
initJdwpRequest();
try {
ByteArrayOutputStream outBytes = new ByteArrayOutputStream();
DataOutputStream outData = new DataOutputStream(outBytes);
writeWithReferenceType(this, outData);
JdwpReplyPacket replyPacket = requestVM(
JdwpCommandPacket.M_LINE_TABLE, outBytes);
switch (replyPacket.errorCode()) {
case JdwpReplyPacket.ABSENT_INFORMATION:
throw new AbsentInformationException(
JDIMessages.MethodImpl_No_line_number_information_available_2);
case JdwpReplyPacket.NATIVE_METHOD:
throw new AbsentInformationException(
JDIMessages.MethodImpl_No_line_number_information_available_2);
}
defaultReplyErrorHandler(replyPacket.errorCode());
DataInputStream replyData = replyPacket.dataInStream();
fLowestValidCodeIndex = readLong("lowest index", replyData); //$NON-NLS-1$
fHighestValidCodeIndex = readLong("highest index", replyData); //$NON-NLS-1$
int nrOfElements = readInt("elements", replyData); //$NON-NLS-1$
fCodeIndexToLine = new HashMap<>();
fLineToCodeIndexes = new HashMap<>();
if (nrOfElements == 0) {
throw new AbsentInformationException(
JDIMessages.MethodImpl_Got_empty_line_number_table_for_this_method_3);
}
fCodeIndexTable = new long[nrOfElements];
fJavaStratumLineNumberTable = new int[nrOfElements];
for (int i = 0; i < nrOfElements; i++) {
long lineCodeIndex = readLong("code index", replyData); //$NON-NLS-1$
Long lineCodeIndexLong = new Long(lineCodeIndex);
int lineNr = readInt("line nr", replyData); //$NON-NLS-1$
Integer lineNrInt = new Integer(lineNr);
// Add entry to code-index to line mapping.
fCodeIndexToLine.put(lineCodeIndexLong, lineNrInt);
fCodeIndexTable[i] = lineCodeIndex;
fJavaStratumLineNumberTable[i] = lineNr;
List<Long> lineNrEntry = fLineToCodeIndexes.get(lineNrInt);
if (lineNrEntry == null) {
lineNrEntry = new ArrayList<>();
fLineToCodeIndexes.put(lineNrInt, lineNrEntry);
}
lineNrEntry.add(lineCodeIndexLong);
}
} catch (IOException e) {
fCodeIndexToLine = null;
fLineToCodeIndexes = null;
defaultIOExceptionHandler(e);
} finally {
handledJdwpRequest();
}
}
/**
* @return Returns the line number that corresponds to the given
* lineCodeIndex.
*/
protected int javaStratumLineNumber(long lineCodeIndex)
throws AbsentInformationException {
if (isAbstract() || isNative() || isObsolete()) {
return -1;
}
getLineTable();
if (lineCodeIndex > fHighestValidCodeIndex) {
throw new AbsentInformationException(JDIMessages.MethodImpl_Invalid_code_index_of_a_location_given_4);
}
Long lineCodeIndexObj;
Integer lineNrObj;
long index = lineCodeIndex;
// Search for the line where this code index is located.
do {
lineCodeIndexObj = new Long(index);
lineNrObj = javaStratumCodeIndexToLine().get(lineCodeIndexObj);
} while (lineNrObj == null && --index >= fLowestValidCodeIndex);
if (lineNrObj == null) {
if (lineCodeIndex >= fLowestValidCodeIndex) {
index = lineCodeIndex;
do {
lineCodeIndexObj = new Long(index);
lineNrObj = javaStratumCodeIndexToLine().get(lineCodeIndexObj);
} while (lineNrObj == null && ++index <= fHighestValidCodeIndex);
if (lineNrObj != null) {
return lineNrObj.intValue();
}
}
throw new AbsentInformationException(JDIMessages.MethodImpl_Invalid_code_index_of_a_location_given_4);
}
return lineNrObj.intValue();
}
/* (non-Javadoc)
* @see com.sun.jdi.Method#allLineLocations()
*/
@Override
public List<Location> allLineLocations() throws AbsentInformationException {
return allLineLocations(virtualMachine().getDefaultStratum(), null);
}
/* (non-Javadoc)
* @see com.sun.jdi.Method#arguments()
*/
@Override
public List<LocalVariable> arguments() throws AbsentInformationException {
if (isNative() || isAbstract()) {
throw new AbsentInformationException(JDIMessages.MethodImpl_No_local_variable_information_available_9);
}
if (fArguments != null) {
return fArguments;
}
List<LocalVariable> result = new ArrayList<>();
Iterator<LocalVariable> iter = variables().iterator();
while (iter.hasNext()) {
LocalVariable var = iter.next();
if (var.isArgument())
result.add(var);
}
fArguments = result;
return fArguments;
}
/**
* @return Returns a text representation of all declared argument types of
* this method.
*/
@Override
public List<String> argumentTypeNames() {
if (fArgumentTypeNames != null) {
return fArgumentTypeNames;
}
List<String> argumentTypeSignatures = argumentTypeSignatures();
List<String> result = new ArrayList<>();
for (Iterator<String> iter = argumentTypeSignatures.iterator(); iter.hasNext();) {
result.add(TypeImpl.signatureToName(iter.next()));
}
fArgumentTypeNames = result;
return fArgumentTypeNames;
}
/**
* @return Returns a signatures of all declared argument types of this
* method.
*/
private List<String> argumentTypeSignatures() {
if (fArgumentTypeSignatures != null) {
return fArgumentTypeSignatures;
}
fArgumentTypeSignatures = GenericSignature.getParameterTypes(signature());
return fArgumentTypeSignatures;
}
/**
* @return Returns the list containing the type of each argument.
*/
@Override
public List<Type> argumentTypes() throws ClassNotLoadedException {
if (fArgumentTypes != null) {
return fArgumentTypes;
}
List<Type> result = new ArrayList<>();
Iterator<String> iter = argumentTypeSignatures().iterator();
ClassLoaderReference classLoaderRef = declaringType().classLoader();
VirtualMachineImpl vm = virtualMachineImpl();
while (iter.hasNext()) {
String argumentTypeSignature = iter.next();
result.add(TypeImpl.create(vm, argumentTypeSignature, classLoaderRef));
}
fArgumentTypes = result;
return fArgumentTypes;
}
/**
* @return Returns an array containing the bytecodes for this method.
*/
@Override
public byte[] bytecodes() {
if (fByteCodes != null) {
return fByteCodes;
}
initJdwpRequest();
try {
ByteArrayOutputStream outBytes = new ByteArrayOutputStream();
DataOutputStream outData = new DataOutputStream(outBytes);
writeWithReferenceType(this, outData);
JdwpReplyPacket replyPacket = requestVM(
JdwpCommandPacket.M_BYTECODES, outBytes);
defaultReplyErrorHandler(replyPacket.errorCode());
DataInputStream replyData = replyPacket.dataInStream();
int length = readInt("length", replyData); //$NON-NLS-1$
fByteCodes = readByteArray(length, "bytecodes", replyData); //$NON-NLS-1$
return fByteCodes;
} catch (IOException e) {
fByteCodes = null;
defaultIOExceptionHandler(e);
return null;
} finally {
handledJdwpRequest();
}
}
/**
* @return Returns the hash code value.
*/
@Override
public int hashCode() {
return fMethodID.hashCode();
}
/**
* @return Returns true if two mirrors refer to the same entity in the
* target VM.
* @see java.lang.Object#equals(Object)
*/
@Override
public boolean equals(Object object) {
return object != null
&& object.getClass().equals(this.getClass())
&& fMethodID.equals(((MethodImpl) object).fMethodID)
&& referenceTypeImpl().equals(
((MethodImpl) object).referenceTypeImpl());
}
/**
* @return Returns a negative integer, zero, or a positive integer as this
* {@link Method} is less than, equal to, or greater than the specified
* {@link Method}.
*/
@Override
public int compareTo(Method method) {
if (method == null || !method.getClass().equals(this.getClass()))
throw new ClassCastException(
JDIMessages.MethodImpl_Can__t_compare_method_to_given_object_6);
// See if declaring types are the same, if not return comparison between
// declaring types.
Method type2 = method;
if (!declaringType().equals(type2.declaringType()))
return declaringType().compareTo(type2.declaringType());
// Return comparison of position within declaring type.
int index1 = declaringType().methods().indexOf(this);
int index2 = type2.declaringType().methods().indexOf(type2);
if (index1 < index2) {
return -1;
} else if (index1 > index2) {
return 1;
} else {
return 0;
}
}
/* (non-Javadoc)
* @see com.sun.jdi.Method#isAbstract()
*/
@Override
public boolean isAbstract() {
return (fModifierBits & MODIFIER_ACC_ABSTRACT) != 0;
}
/* (non-Javadoc)
* @see com.sun.jdi.Method#isConstructor()
*/
@Override
public boolean isConstructor() {
return name().equals("<init>"); //$NON-NLS-1$
}
/* (non-Javadoc)
* @see com.sun.jdi.Method#isNative()
*/
@Override
public boolean isNative() {
return (fModifierBits & MODIFIER_ACC_NATIVE) != 0;
}
/* (non-Javadoc)
* @see com.sun.jdi.Method#isStaticInitializer()
*/
@Override
public boolean isStaticInitializer() {
return name().equals("<clinit>"); //$NON-NLS-1$
}
/* (non-Javadoc)
* @see com.sun.jdi.Method#isSynchronized()
*/
@Override
public boolean isSynchronized() {
return (fModifierBits & MODIFIER_ACC_SYNCHRONIZED) != 0;
}
/* (non-Javadoc)
* @see com.sun.jdi.Method#locationOfCodeIndex(long)
*/
@Override
public Location locationOfCodeIndex(long index) {
if (isAbstract() || isNative()) {
return null;
}
try {
Integer lineNrInt = javaStratumCodeIndexToLine().get(new Long(index));
if (lineNrInt == null) {
throw new AbsentInformationException(MessageFormat.format(JDIMessages.MethodImpl_No_valid_location_at_the_specified_code_index__0__2, new Object[] { Long.toString(index) }));
}
} catch (AbsentInformationException e) {
}
return new LocationImpl(virtualMachineImpl(), this, index);
}
/* (non-Javadoc)
* @see com.sun.jdi.Method#locationsOfLine(int)
*/
@Override
public List<Location> locationsOfLine(int line) throws AbsentInformationException {
return locationsOfLine(virtualMachine().getDefaultStratum(), null, line);
}
/* (non-Javadoc)
* @see com.sun.jdi.Method#returnType()
*/
@Override
public Type returnType() throws ClassNotLoadedException {
int startIndex = signature().lastIndexOf(')') + 1; // Signature position
// is just after
// ending brace.
return TypeImpl.create(virtualMachineImpl(),
signature().substring(startIndex), declaringType()
.classLoader());
}
/* (non-Javadoc)
* @see com.sun.jdi.Method#returnTypeName()
*/
@Override
public String returnTypeName() {
if (fReturnTypeName != null) {
return fReturnTypeName;
}
int startIndex = signature().lastIndexOf(')') + 1; // Signature position
// is just after
// ending brace.
fReturnTypeName = TypeImpl.signatureToName(signature().substring(
startIndex));
return fReturnTypeName;
}
/* (non-Javadoc)
* @see com.sun.jdi.Method#variables()
*/
@Override
public List<LocalVariable> variables() throws AbsentInformationException {
if (isNative() || isAbstract()) {
throw new AbsentInformationException(JDIMessages.MethodImpl_No_local_variable_information_available_9);
}
if (fVariables != null) {
return fVariables;
}
initJdwpRequest();
try {
ByteArrayOutputStream outBytes = new ByteArrayOutputStream();
DataOutputStream outData = new DataOutputStream(outBytes);
writeWithReferenceType(this, outData);
boolean withGenericSignature = virtualMachineImpl()
.isJdwpVersionGreaterOrEqual(1, 5);
int jdwpCommand = withGenericSignature ? JdwpCommandPacket.M_VARIABLE_TABLE_WITH_GENERIC
: JdwpCommandPacket.M_VARIABLE_TABLE;
JdwpReplyPacket replyPacket = requestVM(jdwpCommand, outBytes);
switch (replyPacket.errorCode()) {
case JdwpReplyPacket.ABSENT_INFORMATION:
return inferArguments();
}
defaultReplyErrorHandler(replyPacket.errorCode());
DataInputStream replyData = replyPacket.dataInStream();
fArgumentSlotsCount = readInt("arg count", replyData); //$NON-NLS-1$
int nrOfElements = readInt("elements", replyData); //$NON-NLS-1$
List<LocalVariable> variables = new ArrayList<>(nrOfElements);
for (int i = 0; i < nrOfElements; i++) {
long codeIndex = readLong("code index", replyData); //$NON-NLS-1$
String name = readString("name", replyData); //$NON-NLS-1$
String signature = readString("signature", replyData); //$NON-NLS-1$
String genericSignature = null;
if (withGenericSignature) {
genericSignature = readString("generic signature", replyData); //$NON-NLS-1$
if ("".equals(genericSignature)) { //$NON-NLS-1$
genericSignature = null;
}
}
int length = readInt("length", replyData); //$NON-NLS-1$
int slot = readInt("slot", replyData); //$NON-NLS-1$
boolean isArgument = slot < fArgumentSlotsCount;
// Note that for instance methods, the first slot contains the
// this reference.
if (isStatic() || slot > 0) {
LocalVariableImpl localVar = new LocalVariableImpl(
virtualMachineImpl(), this, codeIndex, name,
signature, genericSignature, length, slot,
isArgument);
variables.add(localVar);
}
}
fVariables = variables;
return fVariables;
} catch (IOException e) {
fArgumentSlotsCount = -1;
fVariables = null;
defaultIOExceptionHandler(e);
return null;
} finally {
handledJdwpRequest();
}
}
/**
* @throws AbsentInformationException
*/
private List<LocalVariable> inferArguments() throws AbsentInformationException {
// infer arguments, if possible
// try to generate the right generic signature for each argument
String genericSignature = genericSignature();
String[] signatures = argumentTypeSignatures().toArray(new String[0]);
String[] genericSignatures;
if (genericSignature == null) {
genericSignatures = new String[signatures.length];
} else {
genericSignatures = GenericSignature.getParameterTypes(genericSignature).toArray(new String[0]);
for (int i = 0; i < genericSignatures.length; i++) {
if (genericSignatures[i].equals(signatures[i])) {
genericSignatures[i] = null;
}
}
}
int slot = 0;
if (!isStatic()) {
slot++;
}
if (signatures.length > 0) {
fArgumentSlotsCount = signatures.length;
fVariables = new ArrayList<>(fArgumentSlotsCount);
for (int i = 0; i < signatures.length; i++) {
String name = "arg" + i; //$NON-NLS-1$
LocalVariableImpl localVar = new LocalVariableImpl(virtualMachineImpl(), this, 0, name, signatures[i], genericSignatures[i], -1, slot, true);
fVariables.add(localVar);
slot++;
}
return fVariables;
}
throw new AbsentInformationException(
JDIMessages.MethodImpl_No_local_variable_information_available_9);
}
/* (non-Javadoc)
* @see com.sun.jdi.Method#variablesByName(java.lang.String)
*/
@Override
public List<LocalVariable> variablesByName(String name) throws AbsentInformationException {
Iterator<LocalVariable> iter = variables().iterator();
List<LocalVariable> result = new ArrayList<>();
while (iter.hasNext()) {
LocalVariable var = iter.next();
if (var.name().equals(name)) {
result.add(var);
}
}
return result;
}
/**
* @see com.sun.jdi.Locatable#location()
*/
@Override
public Location location() {
if (isAbstract()) {
return null;
}
if (isNative()) {
return new LocationImpl(virtualMachineImpl(), this, -1);
}
// First retrieve line code table.
try {
getLineTable();
} catch (AbsentInformationException e) {
return new LocationImpl(virtualMachineImpl(), this, -1);
}
// Return location with Lowest Valid Code Index.
return new LocationImpl(virtualMachineImpl(), this,
fLowestValidCodeIndex);
}
/**
* Writes JDWP representation.
*/
public void write(MirrorImpl target, DataOutputStream out)
throws IOException {
fMethodID.write(out);
if (target.fVerboseWriter != null) {
target.fVerboseWriter.println("method", fMethodID.value()); //$NON-NLS-1$
}
}
/**
* Writes JDWP representation, including ReferenceType.
*/
protected void writeWithReferenceType(MirrorImpl target,
DataOutputStream out) throws IOException {
referenceTypeImpl().write(target, out);
write(target, out);
}
/**
* Writes JDWP representation, including ReferenceType with Tag.
*/
protected void writeWithReferenceTypeWithTag(MirrorImpl target,
DataOutputStream out) throws IOException {
referenceTypeImpl().writeWithTag(target, out);
write(target, out);
}
/**
* @return Reads JDWP representation and returns new instance.
*/
protected static MethodImpl readWithReferenceTypeWithTag(MirrorImpl target,
DataInputStream in) throws IOException {
VirtualMachineImpl vmImpl = target.virtualMachineImpl();
// See Location.
ReferenceTypeImpl referenceType = ReferenceTypeImpl.readWithTypeTag(
target, in);
if (referenceType == null)
return null;
JdwpMethodID ID = new JdwpMethodID(vmImpl);
if (target.fVerboseWriter != null) {
target.fVerboseWriter.println("method", ID.value()); //$NON-NLS-1$
}
ID.read(in);
if (ID.isNull()) {
return null;
}
// The method must be part of a known reference type.
Method method = referenceType.findMethod(ID);
if (method == null) {
throw new InternalError(
JDIMessages.MethodImpl_Got_MethodID_of_ReferenceType_that_is_not_a_member_of_the_ReferenceType_10);
}
return (MethodImpl) method;
}
/**
* @return Reads JDWP representation and returns new instance.
*/
protected static MethodImpl readWithNameSignatureModifiers(
ReferenceTypeImpl target, ReferenceTypeImpl referenceType,
boolean withGenericSignature, DataInputStream in)
throws IOException {
VirtualMachineImpl vmImpl = target.virtualMachineImpl();
JdwpMethodID ID = new JdwpMethodID(vmImpl);
ID.read(in);
if (target.fVerboseWriter != null) {
target.fVerboseWriter.println("method", ID.value()); //$NON-NLS-1$
}
if (ID.isNull()) {
return null;
}
String name = target.readString("name", in); //$NON-NLS-1$
String signature = target.readString("signature", in); //$NON-NLS-1$
String genericSignature = null;
if (withGenericSignature) {
genericSignature = target.readString("generic signature", in); //$NON-NLS-1$
if ("".equals(genericSignature)) { //$NON-NLS-1$
genericSignature = null;
}
}
int modifierBits = target.readInt(
"modifiers", AccessibleImpl.getModifierStrings(), in); //$NON-NLS-1$
MethodImpl mirror = new MethodImpl(vmImpl, referenceType, ID, name,
signature, genericSignature, modifierBits);
return mirror;
}
/**
* Retrieves constant mappings.
*/
public static void getConstantMaps() {
if (fgInvokeOptions != null) {
return;
}
Field[] fields = MethodImpl.class.getDeclaredFields();
fgInvokeOptions = new String[32];
for (Field field : fields) {
if ((field.getModifiers() & Modifier.PUBLIC) == 0
|| (field.getModifiers() & java.lang.reflect.Modifier.STATIC) == 0
|| (field.getModifiers() & Modifier.FINAL) == 0) {
continue;
}
try {
String name = field.getName();
if (name.startsWith("INVOKE_")) { //$NON-NLS-1$
int value = field.getInt(null);
for (int j = 0; j < fgInvokeOptions.length; j++) {
if ((1 << j & value) != 0) {
fgInvokeOptions[j] = name;
break;
}
}
}
} catch (IllegalAccessException e) {
// Will not occur for own class.
} catch (IllegalArgumentException e) {
// Should not occur.
// We should take care that all public static final constants
// in this class are numbers that are convertible to int.
}
}
}
/**
* @return Returns a map with string representations of tags.
*/
protected static String[] getInvokeOptions() {
getConstantMaps();
return fgInvokeOptions;
}
/**
* @see Method#isObsolete()
*
* The JDK 1.4.0 specification states that obsolete methods are given
* an ID of zero. It also states that when a method is redefined, the
* new method gets the ID of the old method. Thus, the JDWP query for
* isObsolete on JDK 1.4 will never return true for a non-zero method
* ID. The query is therefore not needed
*/
@Override
public boolean isObsolete() {
if (virtualMachineImpl().isJdwpVersionGreaterOrEqual(1, 4)) {
return fMethodID.value() == 0;
}
return false;
}
/* (non-Javadoc)
* @see com.sun.jdi.Method#allLineLocations(java.lang.String, java.lang.String)
*/
@Override
public List<Location> allLineLocations(String stratum, String sourceName) throws AbsentInformationException {
if (isAbstract() || isNative()) {
return Collections.EMPTY_LIST;
}
if (stratum == null) { // if stratum not defined use the default stratum for the declaring type
stratum = declaringType().defaultStratum();
}
List<Location> allLineLocations = null;
Map<String, List<Location>> sourceNameAllLineLocations = null;
if (fStratumAllLineLocations == null) { // the stratum map doesn't
// exist, create it
fStratumAllLineLocations = new HashMap<>();
} else {
// get the source name map
sourceNameAllLineLocations = fStratumAllLineLocations.get(stratum);
}
if (sourceNameAllLineLocations == null) { // the source name map doesn't
// exist, create it
sourceNameAllLineLocations = new HashMap<>();
fStratumAllLineLocations.put(stratum, sourceNameAllLineLocations);
} else {
// get the line locations
allLineLocations = sourceNameAllLineLocations.get(sourceName);
}
if (allLineLocations == null) { // the line locations are not know,
// compute and store them
getLineTable();
allLineLocations = referenceTypeImpl().allLineLocations(stratum, sourceName, this, fCodeIndexTable, fJavaStratumLineNumberTable);
sourceNameAllLineLocations.put(sourceName, allLineLocations);
}
return allLineLocations;
}
/* (non-Javadoc)
* @see com.sun.jdi.Method#locationsOfLine(java.lang.String, java.lang.String, int)
*/
@Override
public List<Location> locationsOfLine(String stratum, String sourceName,
int lineNumber) throws AbsentInformationException {
if (isAbstract() || isNative()) {
return Collections.EMPTY_LIST;
}
return referenceTypeImpl().locationsOfLine(stratum, sourceName, lineNumber, this);
}
/**
* Return a list which contains a location for the each disjoint range of
* code indices that have bean assigned to the given lines (by the compiler
* or/and the VM). Return an empty list if there is not executable code at
* the specified lines.
*/
protected List<Location> javaStratumLocationsOfLines(List<Integer> javaLines) throws AbsentInformationException {
Set<Long> tmpLocations = new TreeSet<>();
for (Iterator<Integer> iter = javaLines.iterator(); iter.hasNext();) {
Integer key = iter.next();
List<Long> indexes = javaStratumLineToCodeIndexes(key.intValue());
if (indexes != null) {
tmpLocations.addAll(indexes);
}
}
List<Location> locations = new ArrayList<>();
for (Iterator<Long> iter = tmpLocations.iterator(); iter.hasNext();) {
long index = iter.next().longValue();
int position = Arrays.binarySearch(fCodeIndexTable, index);
if(position < 0) {
//https://bugs.eclipse.org/bugs/show_bug.cgi?id=388172
//the key is not in the code index, we should not insert it as the line table is supposed to be
//constant unless the parent class is redefined.
//See http://docs.oracle.com/javase/6/docs/platform/jpda/jdwp/jdwp-protocol.html#JDWP_Method_LineTable for more information
continue;
}
if (position == 0 || !tmpLocations.contains(new Long(fCodeIndexTable[position - 1]))) {
locations.add(new LocationImpl(virtualMachineImpl(), this, index));
}
}
return locations;
}
/* (non-Javadoc)
* @see com.sun.jdi.Method#isBridge()
*/
@Override
public boolean isBridge() {
return (fModifierBits & MODIFIER_ACC_BRIDGE) != 0;
}
/* (non-Javadoc)
* @see com.sun.jdi.Method#isVarArgs()
*/
@Override
public boolean isVarArgs() {
// TODO: remove this test when j9 solve its problem
// it returns invalid 1.5 flags for 1.4 classes.
// see bug 53870
return !virtualMachine().name().equals("j9") && (fModifierBits & MODIFIER_ACC_VARARGS) != 0; //$NON-NLS-1$
}
}