use of com.ibm.dtfj.java.JavaReference in project openj9 by eclipse.
the class JavaReferenceComparator method testEquals.
// getDescription
// getReachability
// getReferenceType
// getRootType
// getSource
// getTarget
// isClassReference
// isObjectReference
public void testEquals(Object ddrObject, Object jextractObject, int members) {
JavaReference ddrJavaReference = (JavaReference) ddrObject;
JavaReference jextractJavaReference = (JavaReference) jextractObject;
// getDescription
if ((DESCRIPTION & members) != 0)
testJavaEquals(ddrJavaReference, jextractJavaReference, "getDescription");
// getReachability
if ((REACHABILITY & members) != 0)
testJavaEquals(ddrJavaReference, jextractJavaReference, "getReachability");
// getReferenceType
if ((REFERENCE_TYPE & members) != 0)
testJavaEquals(ddrJavaReference, jextractJavaReference, "getReferenceType");
// getRootType
if ((ROOT_TYPE & members) != 0)
testJavaEquals(ddrJavaReference, jextractJavaReference, "getRootType");
// getSource
if ((SOURCE & members) != 0) {
try {
javaClassComparator.testComparatorEquals(ddrObject, jextractObject, "getSource");
return;
} catch (ClassCastException e) {
// Do nothing.
}
// We only get here if the target was NOT a JavaClass
try {
javaObjectComparator.testComparatorEquals(ddrObject, jextractObject, "getSource");
return;
} catch (ClassCastException e) {
// Do nothing
}
// We only get here if the target was NOT a JavaClass or a JavaObject
javaStackFrameComparator.testComparatorEquals(ddrObject, jextractObject, "getSource", JavaStackFrameComparator.BASE_POINTER + JavaStackFrameComparator.LOCATION);
}
// getTarget
if ((TARGET & members) != 0) {
try {
javaClassComparator.testComparatorEquals(ddrObject, jextractObject, "getTarget");
return;
} catch (ClassCastException e) {
// Do nothing.
}
// We only get here if the target was NOT a JavaClass
javaObjectComparator.testComparatorEquals(ddrObject, jextractObject, "getTarget");
}
// isClassReference
if ((IS_CLASS_REFERENCE & members) != 0)
testJavaEquals(ddrJavaReference, jextractJavaReference, "isClassReference");
// isObjectReference
if ((IS_OBJECT_REFERENCE & members) != 0)
testJavaEquals(ddrJavaReference, jextractJavaReference, "isObjectReference");
}
use of com.ibm.dtfj.java.JavaReference in project openj9 by eclipse.
the class PHDJavaRuntime method findLoaders.
/**
* Helper method to try to allocate classes to the correct class loader
* There isn't an explicit mention of the loader, but an outbound reference might be to the loader.
* First find all the objects which are class loaders.
* The look at each file, see if it has a reference to a loader object and if so allocate it to
* that loader.
* @param file
* @throws IOException
*/
private void findLoaders(HeapdumpReader newreader) throws IOException {
// Where all the classes orginally have been put
final PHDJavaClassLoader boot = loaders.get(null);
// Might fail to find a class with a very corrupt dump
final JavaClass jlc = findClass("java/lang/Class");
final long jlcAddress = jlc == null || jlc.getID() == null ? 0 : jlc.getID().getAddress();
// Find all the class loader classes
final JavaClass jcl = findClass("java/lang/ClassLoader");
final HashMap<Long, JavaClass> classLoaderClasses = new HashMap<Long, JavaClass>();
for (Iterator<JavaClass> it = boot.getDefinedClasses(); it.hasNext(); ) {
JavaClass cls = it.next();
if (cls instanceof CorruptData)
continue;
try {
// Avoid bug with superclass loops by remembering superclasses
// PHD Version 4 bug - bad superclass: J2RE 5.0 IBM J9 2.3 AIX ppc64-64 build 20080314_17962_BHdSMr
HashSet<JavaClass> supers = new HashSet<JavaClass>();
for (JavaClass j1 = cls; j1 != null && supers.add(j1); j1 = j1.getSuperclass()) {
/*
* See if either a superclass is java.lang.ClassLoader
* or if no superclass information is available (old Java 5)
* whether the name ends with "ClassLoader"
*/
if (j1.equals(jcl) || cls.getSuperclass() == null && !j1.isArray() && j1.getName().endsWith("ClassLoader")) {
ImagePointer ip = cls.getID();
if (ip != null) {
classLoaderClasses.put(ip.getAddress(), cls);
}
}
}
} catch (CorruptDataException e) {
// Ignore
}
}
// Number of class objects not found at class addresses
final int[] onHeapClasses = new int[1];
// Find all the objects which are class loaders
final PHDJavaHeap heap = heaps.get(0);
final HashMap<Long, JavaObject> classObjects = new HashMap<Long, JavaObject>();
// HeapdumpReader newreader = new HeapdumpReader(file, parentImage);
final int adjustLen = newreader.version() == 4 && newreader.isJ9() ? 1 : 0;
try {
newreader.parse(new PortableHeapDumpListener() {
public void classDump(long address, long superAddress, String name, int size, int flags, int hashCode, LongEnumeration refs) throws Exception {
}
public void objectArrayDump(long address, long classAddress, int flags, int hashCode, LongEnumeration refs, int length, long instanceSize) throws Exception {
if (extraObjectsCache.containsKey(address)) {
// Don't bother saving reference information - we can get it later
JavaObject jo = new PHDJavaObject.Builder(heap, address, arrayOf(classAddress, refs, adjustLen), flags, hashCode).length(length - adjustLen).instanceSize(instanceSize).build();
extraObjectsCache.put(address, jo);
}
}
public void objectDump(long address, long classAddress, int flags, int hashCode, LongEnumeration refs, long instanceSize) throws Exception {
JavaClass cls = classLoaderClasses.get(classAddress);
JavaObject jo;
if (cls != null) {
// Object of type java.lang.ClassLoader, so create the object and the class loader
jo = new PHDJavaObject.Builder(heap, address, cls, flags, hashCode).refs(refs, 0).length(PHDJavaObject.SIMPLE_OBJECT).instanceSize(instanceSize).build();
PHDJavaClassLoader load = new PHDJavaClassLoader(jo);
loaders.put(jo, load);
} else if (classAddress == jlcAddress) {
if (boot.findClass(address) == null) {
++onHeapClasses[0];
}
jo = new PHDJavaObject.Builder(heap, address, jlc, flags, hashCode).refs(refs, 0).length(PHDJavaObject.SIMPLE_OBJECT).instanceSize(instanceSize).build();
classObjects.put(address, jo);
} else {
jo = null;
}
if (extraObjectsCache.containsKey(address)) {
if (jo == null) {
jo = new PHDJavaObject.Builder(heap, address, findClass(classAddress), flags, hashCode).refs(refs, 0).length(PHDJavaObject.SIMPLE_OBJECT).build();
}
extraObjectsCache.put(address, jo);
}
}
public void primitiveArrayDump(long address, int type, int length, int flags, int hashCode, long instanceSize) throws Exception {
if (extraObjectsCache.containsKey(address)) {
// Create a full object as we have the data
JavaObject jo = new PHDJavaObject.Builder(heap, address, findArrayOfType(type), flags, hashCode).refsAsArray(NOREFS, 0).length(length).instanceSize(instanceSize).build();
extraObjectsCache.put(address, jo);
}
}
});
} catch (Exception e) {
// Ignore the exception - we will have seen it elsewhere
// e.printStackTrace();
} finally {
newreader.close();
newreader = null;
}
// Assign classes to the correct loaders
// Also try to set up on/off-heap class addresses
PHDJavaClassLoader boot2 = null;
int foundLoader = 0;
int notFoundLoader = 0;
// How many java/lang classes the possible boot loader has loaded
int loaderJavaLangCount = 0;
boolean useFirstObjectRefAsLoader = onHeapClasses[0] == 0;
for (Iterator<JavaClass> it = boot.getDefinedClasses(); it.hasNext(); ) {
JavaClass j1 = it.next();
PHDJavaClassLoader bestLoader = null;
for (Iterator<JavaReference> it2 = j1.getReferences(); it2.hasNext(); ) {
JavaReference jr = it2.next();
try {
// Is the first outbound object reference to a class loader?
if (jr.isObjectReference()) {
JavaObject jo = (JavaObject) jr.getTarget();
PHDJavaClassLoader newLoader = loaders.get(jo);
if (newLoader != null) {
if (bestLoader == null || !useFirstObjectRefAsLoader) {
bestLoader = newLoader;
}
} else if (onHeapClasses[0] > 0) {
long addr = jo.getID().getAddress();
JavaObject jo2 = classObjects.get(addr);
if (jo2 != null) {
// For Java 6 jdmpview PHD files the on-heap class object is the last ref
// retrieve the full JavaObject from walking the heap earlier
((PHDJavaClass) j1).setJavaObject(jo2);
}
}
// unless using off-heap classes when it is the last reference.
if (!j1.isArray() && useFirstObjectRefAsLoader && onHeapClasses[0] == 0)
break;
}
} catch (CorruptDataException e) {
// e.printStackTrace();
} catch (DataUnavailable e) {
// e.printStackTrace();
}
}
if (bestLoader != null) {
++foundLoader;
// Don't remove the classes from the original loader, nor change the loader
// as otherwise finding the array type fails
bestLoader.prepareToMove(boot, j1);
// Is the class by any chance the type of the class loader?
try {
if (boot2 == null && (j1.equals(jlc) || j1.equals(bestLoader.getObject().getJavaClass()))) {
// We have found the new bootstrap class loader
// Beware java 1.4.2 com/ibm/rmi/util/ClassInfo$NULL_CL_CLASS passes this test!
boot2 = bestLoader;
}
if (boot2 == bestLoader && j1.getName().startsWith("java/lang/"))
++loaderJavaLangCount;
} catch (CorruptDataException e) {
}
} else {
++notFoundLoader;
}
// Try retrieving the full JavaObject for the JavaClass
try {
JavaObject jo = j1.getObject();
if (jo != null) {
long addr = jo.getID().getAddress();
JavaObject jo2 = classObjects.get(addr);
if (jo2 != null) {
((PHDJavaClass) j1).setJavaObject(jo2);
}
}
} catch (CorruptDataException e) {
}
}
// Ignore a bootstrap loader which hasn't loaded 5 java/lang classes
if (loaderJavaLangCount < 5)
boot2 = null;
// Haven't found any loaders, but have a javacore file with loader information
if (metaJavaRuntime != null) {
for (Iterator i = metaJavaRuntime.getJavaClassLoaders(); i.hasNext(); ) {
Object next = i.next();
if (next instanceof CorruptData)
continue;
JavaClassLoader jcl2 = (JavaClassLoader) next;
try {
JavaObject lo = jcl2.getObject();
if (lo != null) {
ImagePointer addr = lo.getID();
if (addr != null) {
ImagePointer ip = space.getPointer(addr.getAddress());
JavaObject jo = getObjectAtAddress(ip);
PHDJavaClassLoader newLoader = loaders.get(jo);
JavaClass loaderClass;
if (newLoader == null) {
try {
// Should be safe to find the class of 'jo' without rereading the PHD file
// as at least a dummy object should be in the extra objects cache.
// It could be that the object is still a dummy one with no proper class.
loaderClass = jo.getJavaClass();
} catch (CorruptDataException e) {
loaderClass = null;
}
JavaClass javacoreLoaderClass;
try {
javacoreLoaderClass = lo.getJavaClass();
} catch (CorruptDataException e) {
javacoreLoaderClass = null;
}
// Mismatch occurs with J2RE 5.0 IBM J9 2.3 Linux amd64-64 build j9vmxa6423-20091104
if (loaderClass != null && javacoreLoaderClass != null && (loaderClass.isArray() || loaderClass.getID() != null && javacoreLoaderClass.getID() != null && loaderClass.getID().getAddress() != javacoreLoaderClass.getID().getAddress())) {
// System.out.println("Skipping loader "+newLoader+" "+jo+" "+jo.getJavaClass()+" "+lo+" "+lo.getJavaClass()+" "+Long.toHexString(addr.getAddress())+" "+ip);
} else {
// The object should have been listed in the extra objects, so may now be the proper object
newLoader = new PHDJavaClassLoader(jo);
loaders.put(jo, newLoader);
}
} else {
// Replace with the offical object
jo = newLoader.getObject();
loaderClass = jo.getJavaClass();
}
if (newLoader != null) {
for (Iterator i2 = jcl2.getDefinedClasses(); i2.hasNext(); ) {
Object next2 = i2.next();
if (next2 instanceof CorruptData)
continue;
JavaClass jc2 = (JavaClass) next2;
ImagePointer ip2 = jc2.getID();
JavaClass j1;
if (ip2 != null) {
long claddr = ip2.getAddress();
j1 = boot.findClass(claddr);
// Not found by address, so try by name.
if (j1 == null) {
// But only if it is the only class of that name
j1 = boot.findClassUnique(jc2.getName());
} else {
// Found by address
try {
j1.getName();
} catch (CorruptDataException e) {
// Our class doesn't have a name, so perhaps the javacore has the name
try {
String actualName = jc2.getName();
PHDJavaClass pj1 = (PHDJavaClass) j1;
// We will need to reindex the classloader as the name as changed
pj1.setName(actualName);
} catch (CorruptDataException e2) {
}
}
}
} else {
// But only if it is the only class of that name
j1 = boot.findClassUnique(jc2.getName());
}
if (j1 != null) {
newLoader.prepareToMove(boot, j1);
// listed in javacore causes problems as byte etc. aren't listed
if (j1.equals(loaderClass) || j1.equals(jlc)) {
// We have found the new bootstrap class loader
boot2 = newLoader;
}
for (Iterator i3 = jc2.getDeclaredMethods(); i3.hasNext(); ) {
Object next3 = i3.next();
if (next3 instanceof CorruptData)
continue;
JavaMethod jm = (JavaMethod) next3;
PHDJavaClass pj1 = (PHDJavaClass) j1;
pj1.addMethod(new PHDJavaMethod(space, pj1, jm));
}
}
}
}
}
}
} catch (CorruptDataException e) {
} catch (DataUnavailable e) {
} catch (MemoryAccessException e) {
}
}
}
// Move the classes to the correct class loaders
for (Iterator<JavaClass> it = boot.getDefinedClasses(); it.hasNext(); ) {
JavaClass j1 = it.next();
try {
JavaClassLoader jcl2 = j1.getClassLoader();
if (!boot.equals(jcl2) && jcl2 instanceof PHDJavaClassLoader) {
transferClass(boot, (PHDJavaClassLoader) jcl2, j1);
}
} catch (CorruptDataException e) {
}
}
// Reindex the loaders to account for the removed classes
for (PHDJavaClassLoader loader : loaders.values()) {
loader.initCache();
}
if (boot2 != null) {
// Move remaining classes to new boot loader
for (Iterator<JavaClass> it = boot.getDefinedClasses(); it.hasNext(); ) {
JavaClass j1 = it.next();
boot2.prepareToMove(boot, j1);
transferClass(boot, boot2, j1);
}
// index the new boot loader to account for the added files
boot2.initCache();
// Remove the original boot class loader as it has no classes
loaders.remove(null);
} else {
// There may be duplicate array classes in the boot loader
for (Iterator<JavaClass> it = boot.getDefinedClasses(); it.hasNext(); ) {
JavaClass j1 = it.next();
JavaClass j2 = boot.setArrayType(this, boot, j1);
}
// index the boot loader to account for the added files
boot.initCache();
}
}
use of com.ibm.dtfj.java.JavaReference in project openj9 by eclipse.
the class DTFJJavaClass method addStaticFieldReferences.
@SuppressWarnings("rawtypes")
private void addStaticFieldReferences(List<Object> references) {
JavaReference jRef;
Iterator declaredFieldIt = getDeclaredFields();
// can get corrupt data returned through the field iterator as it's coming from DTFJ
Object obj = null;
while ((declaredFieldIt.hasNext() && (obj = declaredFieldIt.next()) instanceof DTFJJavaField)) {
DTFJJavaField jField = (DTFJJavaField) obj;
if (jField instanceof DTFJJavaFieldStatic) {
JavaObject jObject;
try {
char type = jField.getSignature().charAt(0);
if (type == DTFJConstants.OBJECT_PREFIX_SIGNATURE || type == DTFJConstants.ARRAY_PREFIX_SIGNATURE) {
jObject = (JavaObject) jField.get(null);
if (jObject != null) {
// build a JavaReference type and add the reference to the container.
String fieldName = jField.getName();
String description = "Static field";
if (null != fieldName) {
description = description + " [field name:" + fieldName + "]";
}
jRef = new DTFJJavaReference(this, jObject, description, JavaReference.REFERENCE_STATIC_FIELD, JavaReference.HEAP_ROOT_UNKNOWN, JavaReference.REACHABILITY_STRONG);
references.add(jRef);
}
}
} catch (Throwable t) {
CorruptData cd = J9DDRDTFJUtils.handleAsCorruptData(DTFJContext.getProcess(), t);
references.add(cd);
}
}
}
}
use of com.ibm.dtfj.java.JavaReference in project openj9 by eclipse.
the class DTFJJavaClass method addClassObjectReference.
private void addClassObjectReference(List<Object> coll) {
JavaReference jRef = null;
try {
com.ibm.dtfj.java.JavaObject classObject = this.getObject();
if (null != classObject) {
jRef = new DTFJJavaReference(this, classObject, "Class object", JavaReference.REFERENCE_CLASS_OBJECT, JavaReference.HEAP_ROOT_UNKNOWN, JavaReference.REACHABILITY_STRONG);
coll.add(jRef);
}
} catch (Throwable t) {
CorruptData cd = J9DDRDTFJUtils.handleAsCorruptData(DTFJContext.getProcess(), t);
coll.add(cd);
}
}
use of com.ibm.dtfj.java.JavaReference in project openj9 by eclipse.
the class DTFJJavaObject method getReferences.
@SuppressWarnings("rawtypes")
public Iterator getReferences() {
boolean isClass = false;
boolean isClassLoader = false;
boolean isWeakReference = false;
boolean isSoftReference = false;
boolean isPhantomReference = false;
if (null == references) {
references = new LinkedList<Object>();
try {
// find this object's class
JavaClass jClass = getJavaClass();
// add a reference to the object's class
if (null != jClass) {
JavaReference ref = new DTFJJavaReference(this, jClass, "Class", JavaReference.REFERENCE_CLASS, JavaReference.HEAP_ROOT_UNKNOWN, JavaReference.REACHABILITY_STRONG);
references.add(ref);
}
if (isArray()) {
if (isObjectArray()) {
addObjectArrayReferences();
}
} else {
isClass = (jClass != null) && jClass.getName().equals("java/lang/Class");
List<JavaClass> superClasses = new LinkedList<JavaClass>();
// Do superclass walk
while (jClass != null) {
String className = jClass.getName();
isClassLoader |= className.equals("java/lang/ClassLoader");
isWeakReference |= className.equals("java/lang/ref/WeakReference");
isSoftReference |= className.equals("java/lang/ref/SoftReference");
isPhantomReference |= className.equals("java/lang/ref/PhantomReference");
superClasses.add(jClass);
jClass = jClass.getSuperclass();
}
int reachability = isWeakReference ? JavaReference.REACHABILITY_WEAK : isSoftReference ? JavaReference.REACHABILITY_SOFT : isPhantomReference ? JavaReference.REACHABILITY_PHANTOM : JavaReference.REACHABILITY_STRONG;
for (JavaClass clazz : superClasses) {
addFieldReferences(clazz, reachability);
}
}
} catch (CorruptDataException e) {
// Corrupt data, so add it to the container.
references.add(e.getCorruptData());
} catch (Throwable t) {
CorruptData cd = J9DDRDTFJUtils.handleAsCorruptData(DTFJContext.getProcess(), t);
references.add(cd);
}
// Now add association-specific references
if (isClassLoader) {
try {
JavaClassLoader associatedClassLoader = getAssociatedClassLoader();
if (associatedClassLoader != null) {
for (Iterator classes = associatedClassLoader.getDefinedClasses(); classes.hasNext(); ) {
Object potentialClass = classes.next();
if (potentialClass instanceof JavaClass) {
JavaClass currentClass = (JavaClass) potentialClass;
JavaReference ref = new DTFJJavaReference(this, currentClass, "Loaded class", JavaReference.REFERENCE_LOADED_CLASS, JavaReference.HEAP_ROOT_UNKNOWN, JavaReference.REACHABILITY_STRONG);
references.add(ref);
}
}
} else {
references.add(J9DDRDTFJUtils.newCorruptData(DTFJContext.getProcess(), "Couldn't find associated JavaClassLoader for classloader object " + this));
}
} catch (Throwable t) {
CorruptData cd = J9DDRDTFJUtils.handleAsCorruptData(DTFJContext.getProcess(), t);
references.add(cd);
}
}
if (isClass) {
try {
JavaClass associatedClass = getAssociatedClass();
if (associatedClass != null) {
JavaReference ref = new DTFJJavaReference(this, associatedClass, "Associated class", JavaReference.REFERENCE_ASSOCIATED_CLASS, JavaReference.HEAP_ROOT_UNKNOWN, JavaReference.REACHABILITY_STRONG);
references.add(ref);
} else {
// No associated class found. For anonymous classes this is expected, the class is not defined in a classloader.
J9ClassPointer j9Class = ConstantPoolHelpers.J9VM_J9CLASS_FROM_HEAPCLASS(object);
if (!J9ClassHelper.isAnonymousClass(j9Class)) {
// Not an anonymous class, so something is wrong/damaged, add a corrupt data object to the references list
references.add(J9DDRDTFJUtils.newCorruptData(DTFJContext.getProcess(), "Couldn't find associated JavaClass for Class object " + this));
}
}
} catch (Throwable t) {
CorruptData cd = J9DDRDTFJUtils.handleAsCorruptData(DTFJContext.getProcess(), t);
references.add(cd);
}
}
}
return references.iterator();
}
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