org.netbeans.lib.profiler.heap.ClassDump Maven / Gradle / Ivy
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package org.netbeans.lib.profiler.heap;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.Collection;
import java.util.Collections;
import java.util.HashMap;
import java.util.HashSet;
import java.util.Iterator;
import java.util.List;
import java.util.Map;
import java.util.Set;
/**
*
* @author Tomas Hurka
*/
class ClassDump extends HprofObject implements JavaClass {
//~ Static fields/initializers -----------------------------------------------------------------------------------------------
private static final boolean DEBUG = false;
private static final Set CANNOT_CONTAIN_ITSELF = new HashSet(Arrays.asList(new String[] {
"java.lang.String", // NOI18N
"java.lang.StringBuffer", // NOI18N
"java.lang.StringBuilder", // NOI18N
"java.io.File" // NOI18N
}));
//~ Instance fields ----------------------------------------------------------------------------------------------------------
final ClassDumpSegment classDumpSegment;
private int instances;
private long firstInstanceOffset;
private long loadClassOffset;
private long retainedSizeByClass;
//~ Constructors -------------------------------------------------------------------------------------------------------------
ClassDump(ClassDumpSegment segment, long offset) {
super(offset);
classDumpSegment = segment;
assert getHprofBuffer().get(offset) == HprofHeap.CLASS_DUMP;
}
//~ Methods ------------------------------------------------------------------------------------------------------------------
public long getAllInstancesSize() {
if (isArray()) {
return ((Long) classDumpSegment.arrayMap.get(this)).longValue();
}
return ((long)getInstancesCount()) * getInstanceSize();
}
public boolean isArray() {
return classDumpSegment.arrayMap.get(this) != null;
}
public Instance getClassLoader() {
return getHprof().getInstanceByID(getClassLoaderId());
}
public Field getField(String name) {
Iterator fIt = getFields().iterator();
while (fIt.hasNext()) {
Field field = (Field) fIt.next();
if (field.getName().equals(name)) {
return field;
}
}
return null;
}
public List getFields() {
List filedsList = classDumpSegment.fieldsCache.get(this);
if (filedsList == null) {
filedsList = computeFields();
classDumpSegment.fieldsCache.put(this,filedsList);
}
return filedsList;
}
public int getInstanceSize() {
if (isArray()) {
return -1;
}
return classDumpSegment.getMinimumInstanceSize()
+ getHprofBuffer().getInt(fileOffset + classDumpSegment.instanceSizeOffset);
}
public long getRetainedSizeByClass() {
getHprof().computeRetainedSizeByClass();
return retainedSizeByClass;
}
public List getInstances() {
int instancesCount = getInstancesCount();
if (instancesCount == 0 && getHprof().eagerInstanceCounting()) {
return Collections.emptyList();
}
LazyInstanceList instancesList = new LazyInstanceList(getHprof(), this, instancesCount);
return instancesList;
// long classId = getJavaClassId();
// HprofHeap heap = getHprof();
// HprofByteBuffer dumpBuffer = getHprofBuffer();
// int idSize = dumpBuffer.getIDSize();
// List instancesList = new ArrayList(instancesCount);
// TagBounds allInstanceDumpBounds = heap.getAllInstanceDumpBounds();
// long[] offset = new long[] { firstInstanceOffset };
//
// while (offset[0] < allInstanceDumpBounds.endOffset) {
// long start = offset[0];
// int classIdOffset = 0;
// long instanceClassId = 0L;
// int tag = heap.readDumpTag(offset);
// Instance instance;
//
// if (tag == HprofHeap.INSTANCE_DUMP) {
// classIdOffset = idSize + 4;
// } else if (tag == HprofHeap.OBJECT_ARRAY_DUMP) {
// classIdOffset = idSize + 4 + 4;
// } else if (tag == HprofHeap.PRIMITIVE_ARRAY_DUMP) {
// byte type = dumpBuffer.get(start + 1 + idSize + 4 + 4);
// instanceClassId = classDumpSegment.getPrimitiveArrayClass(type).getJavaClassId();
// }
//
// if (classIdOffset != 0) {
// instanceClassId = dumpBuffer.getID(start + 1 + classIdOffset);
// }
//
// if (instanceClassId == classId) {
// if (tag == HprofHeap.INSTANCE_DUMP) {
// instance = new InstanceDump(this, start);
// } else if (tag == HprofHeap.OBJECT_ARRAY_DUMP) {
// instance = new ObjectArrayDump(this, start);
// } else if (tag == HprofHeap.PRIMITIVE_ARRAY_DUMP) {
// instance = new PrimitiveArrayDump(this, start);
// } else {
// throw new IllegalArgumentException("Illegal tag " + tag); // NOI18N
// }
//
// instancesList.add(instance);
//
// if (--instancesCount == 0) {
// return instancesList;
// }
// }
// }
//
// if (DEBUG) {
// System.out.println("Class " + getName() + " Col " + instancesList.size() + " instances " + getInstancesCount()); // NOI18N
// }
//
// return instancesList;
}
public int getInstancesCount() {
if (instances == 0) {
getHprof().computeInstances();
}
return instances;
}
public long getJavaClassId() {
return getHprofBuffer().getID(fileOffset + classDumpSegment.classIDOffset);
}
public String getName() {
return getLoadClass().getName();
}
public List getStaticFieldValues() {
return getStaticFieldValues(true);
}
public Collection getSubClasses() {
List classes = classDumpSegment.hprofHeap.getAllClasses();
List subclasses = new ArrayList(classes.size() / 10);
Map subclassesMap = new HashMap((classes.size() * 4) / 3);
subclassesMap.put(this, Boolean.TRUE);
for (int i = 0; i < classes.size(); i++) {
JavaClass jcls = (JavaClass) classes.get(i);
Boolean b = (Boolean) subclassesMap.get(jcls);
if (b == null) {
b = isSubClass(jcls, subclassesMap);
}
if (b.booleanValue() && (jcls != this)) {
subclasses.add(jcls);
}
}
return subclasses;
}
public JavaClass getSuperClass() {
long superClassId = getHprofBuffer().getID(fileOffset + classDumpSegment.superClassIDOffset);
return classDumpSegment.getClassDumpByID(superClassId);
}
public Object getValueOfStaticField(String name) {
Iterator fIt = getStaticFieldValues().iterator();
while (fIt.hasNext()) {
FieldValue fieldValue = (FieldValue) fIt.next();
if (fieldValue.getField().getName().equals(name)) {
if (fieldValue instanceof HprofFieldObjectValue) {
return ((HprofFieldObjectValue) fieldValue).getInstance();
} else {
return ((HprofFieldValue) fieldValue).getTypeValue();
}
}
}
return null;
}
private List computeFields() {
HprofByteBuffer buffer = getHprofBuffer();
long offset = fileOffset + getInstanceFieldOffset();
int i;
int fields = buffer.getShort(offset);
List filedsList = new ArrayList(fields);
for (i = 0; i < fields; i++) {
filedsList.add(new HprofField(this, offset + 2 + (i * classDumpSegment.fieldSize)));
}
return filedsList;
}
List getStaticFieldValues(boolean addClassLoader) {
HprofByteBuffer buffer = getHprofBuffer();
long offset = fileOffset + getStaticFieldOffset();
int i;
int fields;
List filedsList;
HprofHeap heap = getHprof();
fields = buffer.getShort(offset);
offset += 2;
filedsList = new ArrayList(fields+(addClassLoader?0:1));
for (i = 0; i < fields; i++) {
byte type = buffer.get(offset + classDumpSegment.fieldTypeOffset);
int fieldSize = classDumpSegment.fieldSize + heap.getValueSize(type);
HprofFieldValue value;
if (type == HprofHeap.OBJECT) {
value = new HprofFieldObjectValue(this, offset);
} else {
value = new HprofFieldValue(this, offset);
}
filedsList.add(value);
offset += fieldSize;
}
if (addClassLoader) {
long classLoaderOffset = fileOffset + classDumpSegment.classLoaderIDOffset;
filedsList.add(new ClassLoaderFieldValue(this, classLoaderOffset));
}
return filedsList;
}
List getAllInstanceFields() {
List fields = new ArrayList(50);
for (JavaClass jcls = this; jcls != null; jcls = jcls.getSuperClass()) {
fields.addAll(jcls.getFields());
}
return fields;
}
void setClassLoadOffset(long offset) {
loadClassOffset = offset;
}
int getConstantPoolSize() {
long cpOffset = fileOffset + classDumpSegment.constantPoolSizeOffset;
HprofByteBuffer buffer = getHprofBuffer();
int cpRecords = buffer.getShort(cpOffset);
HprofHeap heap = getHprof();
cpOffset += 2;
for (int i = 0; i < cpRecords; i++) {
byte type = buffer.get(cpOffset + 2);
int size = heap.getValueSize(type);
cpOffset += (2 + 1 + size);
}
return (int) (cpOffset - (fileOffset + classDumpSegment.constantPoolSizeOffset));
}
HprofHeap getHprof() {
return classDumpSegment.hprofHeap;
}
HprofByteBuffer getHprofBuffer() {
return classDumpSegment.hprofHeap.dumpBuffer;
}
int getInstanceFieldOffset() {
int staticFieldOffset = getStaticFieldOffset();
return staticFieldOffset + getStaticFiledSize(staticFieldOffset);
}
LoadClass getLoadClass() {
return new LoadClass(getHprof().getLoadClassSegment(), loadClassOffset);
}
long getClassLoaderId() {
return getHprofBuffer().getID(fileOffset + classDumpSegment.classLoaderIDOffset);
}
List getReferences() {
return getHprof().findReferencesFor(getJavaClassId());
}
int getStaticFieldOffset() {
return classDumpSegment.constantPoolSizeOffset + getConstantPoolSize();
}
int getStaticFiledSize(int staticFieldOffset) {
int i;
HprofByteBuffer buffer = getHprofBuffer();
int idSize = buffer.getIDSize();
long fieldOffset = fileOffset + staticFieldOffset;
int fields = buffer.getShort(fieldOffset);
HprofHeap heap = getHprof();
fieldOffset += 2;
for (i = 0; i < fields; i++) {
byte type = buffer.get(fieldOffset + idSize);
int size = heap.getValueSize(type);
fieldOffset += (idSize + 1 + size);
}
return (int) (fieldOffset - staticFieldOffset - fileOffset);
}
void findStaticReferencesFor(long instanceId, List refs) {
int i;
HprofByteBuffer buffer = getHprofBuffer();
int idSize = buffer.getIDSize();
long fieldOffset = fileOffset + getStaticFieldOffset();
int fields = buffer.getShort(fieldOffset);
List staticFileds = null;
HprofHeap heap = getHprof();
fieldOffset += 2;
for (i = 0; i < fields; i++) {
byte type = buffer.get(fieldOffset + idSize);
int size = heap.getValueSize(type);
if ((type == HprofHeap.OBJECT) && (instanceId == buffer.getID(fieldOffset + idSize + 1))) {
if (staticFileds == null) {
staticFileds = getStaticFieldValues();
}
refs.add(staticFileds.get(i));
}
fieldOffset += (idSize + 1 + size);
}
if (instanceId == getClassLoaderId()) {
if (staticFileds == null) {
staticFileds = getStaticFieldValues();
}
refs.add(staticFileds.get(fields));
}
}
void registerInstance(long offset) {
instances++;
if (firstInstanceOffset == 0) {
firstInstanceOffset = offset;
if (DEBUG) {
System.out.println("First instance :"+getName()+" "+offset/1024/1024); // NOI18N
}
}
}
void addSizeForInstance(Instance i) {
retainedSizeByClass+=i.getRetainedSize();
}
boolean canContainItself() {
if (getInstancesCount()>=2 && !CANNOT_CONTAIN_ITSELF.contains(getName())) {
Iterator fieldsIt = getAllInstanceFields().iterator();
while(fieldsIt.hasNext()) {
Field f = (Field) fieldsIt.next();
if (f.getType().getName().equals("object")) { // NOI18N
return true;
}
}
}
if (DEBUG) {
if (instances>10) System.out.println(getName()+" cannot contain itself "+instances); // NOI18N
}
return false;
}
private static Boolean isSubClass(JavaClass jcls, Map subclassesMap) {
JavaClass superClass = jcls.getSuperClass();
Boolean b;
if (superClass == null) {
b = Boolean.FALSE;
} else {
b = (Boolean) subclassesMap.get(superClass);
if (b == null) {
b = isSubClass(superClass, subclassesMap);
}
}
subclassesMap.put(jcls, b);
return b;
}
}
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