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Example 6 with JavaClass

use of com.ibm.dtfj.java.JavaClass in project openj9 by eclipse.

the class DTFJJavaClass method addSuperclassReference.

private void addSuperclassReference(List<Object> coll) {
    JavaReference jRef = null;
    try {
        JavaClass superClass = this.getSuperclass();
        if (null != superClass) {
            jRef = new DTFJJavaReference(this, superClass, "Superclass", JavaReference.REFERENCE_SUPERCLASS, JavaReference.HEAP_ROOT_UNKNOWN, JavaReference.REACHABILITY_STRONG);
            coll.add(jRef);
        }
    } catch (Throwable t) {
        CorruptData cd = J9DDRDTFJUtils.handleAsCorruptData(DTFJContext.getProcess(), t);
        coll.add(cd);
    }
}
Also used : JavaReference(com.ibm.dtfj.java.JavaReference) JavaClass(com.ibm.dtfj.java.JavaClass) CorruptData(com.ibm.dtfj.image.CorruptData) J9DDRCorruptData(com.ibm.j9ddr.view.dtfj.image.J9DDRCorruptData)

Example 7 with JavaClass

use of com.ibm.dtfj.java.JavaClass in project openj9 by eclipse.

the class DTFJJavaClass method addConstantPoolReferences.

@SuppressWarnings("rawtypes")
private JavaReference addConstantPoolReferences(List<Object> references) {
    // get the Constant Pool references from this class.
    JavaReference jRef = null;
    Iterator constantPoolIt = getConstantPoolReferences();
    try {
        while (constantPoolIt.hasNext()) {
            // get each reference in turn, note that the iterator can return JavaClass
            // JavaObject and CorruptData. The CorruptData objects are ignored.
            Object cpObject = constantPoolIt.next();
            if (cpObject instanceof JavaObject) {
                // add the reference to the container.
                jRef = new DTFJJavaReference(this, cpObject, "Constant Pool Object", JavaReference.REFERENCE_CONSTANT_POOL, JavaReference.HEAP_ROOT_UNKNOWN, JavaReference.REACHABILITY_STRONG);
            } else if (cpObject instanceof JavaClass) {
                // add the reference to the container.
                jRef = new DTFJJavaReference(this, cpObject, "Constant Pool Class", JavaReference.REFERENCE_CONSTANT_POOL, JavaReference.HEAP_ROOT_UNKNOWN, JavaReference.REACHABILITY_STRONG);
            }
            if (null != jRef) {
                references.add(jRef);
            }
        }
    } catch (Throwable t) {
        CorruptData cd = J9DDRDTFJUtils.handleAsCorruptData(DTFJContext.getProcess(), t);
        references.add(cd);
    }
    return jRef;
}
Also used : JavaReference(com.ibm.dtfj.java.JavaReference) JavaObject(com.ibm.dtfj.java.JavaObject) JavaClass(com.ibm.dtfj.java.JavaClass) J9ObjectFieldOffsetIterator(com.ibm.j9ddr.vm29.j9.J9ObjectFieldOffsetIterator) DTFJConstantPoolIterator(com.ibm.j9ddr.vm29.view.dtfj.java.j9.DTFJConstantPoolIterator) J9DDRDTFJUtils.corruptIterator(com.ibm.j9ddr.view.dtfj.J9DDRDTFJUtils.corruptIterator) Iterator(java.util.Iterator) JavaObject(com.ibm.dtfj.java.JavaObject) J9Object(com.ibm.j9ddr.vm29.structure.J9Object) CorruptData(com.ibm.dtfj.image.CorruptData) J9DDRCorruptData(com.ibm.j9ddr.view.dtfj.image.J9DDRCorruptData)

Example 8 with JavaClass

use of com.ibm.dtfj.java.JavaClass in project openj9 by eclipse.

the class DTFJJavaRuntime method getCompiledMethods.

@SuppressWarnings({ "rawtypes", "unchecked" })
public Iterator getCompiledMethods() {
    if (compiledMethods == null) {
        compiledMethods = new ArrayList<Object>();
        Iterator<Object> classLoaderIterators = getJavaClassLoaders();
        while (classLoaderIterators.hasNext()) {
            Object classLoaderObj = classLoaderIterators.next();
            if (classLoaderObj instanceof CorruptData) {
                compiledMethods.add(classLoaderObj);
            } else {
                Iterator classesIterator = ((JavaClassLoader) classLoaderObj).getDefinedClasses();
                while (classesIterator.hasNext()) {
                    Object classObject = classesIterator.next();
                    if (classObject instanceof CorruptData) {
                        compiledMethods.add(classObject);
                    } else {
                        Iterator methodsIterator = ((JavaClass) classObject).getDeclaredMethods();
                        while (methodsIterator.hasNext()) {
                            Object methodObj = methodsIterator.next();
                            if (methodObj instanceof CorruptData) {
                                compiledMethods.add(methodObj);
                            }
                            if (((JavaMethod) methodObj).getCompiledSections().hasNext()) {
                                compiledMethods.add(methodObj);
                            }
                        }
                    }
                }
            }
        }
    }
    return compiledMethods.iterator();
}
Also used : JavaClassLoader(com.ibm.dtfj.java.JavaClassLoader) JavaClass(com.ibm.dtfj.java.JavaClass) GCClassLoaderIterator(com.ibm.j9ddr.vm29.j9.gc.GCClassLoaderIterator) GCVMThreadListIterator(com.ibm.j9ddr.vm29.j9.gc.GCVMThreadListIterator) MemoryCategoryIterator(com.ibm.j9ddr.vm29.j9.walkers.MemoryCategoryIterator) J9DDRDTFJUtils.corruptIterator(com.ibm.j9ddr.view.dtfj.J9DDRDTFJUtils.corruptIterator) J9MemTagIterator(com.ibm.j9ddr.vm29.j9.walkers.J9MemTagIterator) Iterator(java.util.Iterator) DTFJMonitorIterator(com.ibm.j9ddr.vm29.view.dtfj.java.j9.DTFJMonitorIterator) JavaObject(com.ibm.dtfj.java.JavaObject) CorruptData(com.ibm.dtfj.image.CorruptData) J9DDRCorruptData(com.ibm.j9ddr.view.dtfj.image.J9DDRCorruptData)

Example 9 with JavaClass

use of com.ibm.dtfj.java.JavaClass in project openj9 by eclipse.

the class PHDJavaRuntime method transferClass.

private void transferClass(final PHDJavaClassLoader from, PHDJavaClassLoader to, JavaClass j1) {
    to.move(from, j1, lastDummyClassAddr());
    // We have moved the class - also see if this is the type of an array object,
    // and so if the actual array type needs to be found now.
    JavaClass j2 = to.setArrayType(this, from, j1);
    if (j2 != null) {
        // The array type was found in the boot loader, so move it now.
        to.prepareToMove(from, j2);
        to.move(from, j2, lastDummyClassAddr());
    }
}
Also used : JavaClass(com.ibm.dtfj.java.JavaClass)

Example 10 with JavaClass

use of com.ibm.dtfj.java.JavaClass 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();
    }
}
Also used : PortableHeapDumpListener(com.ibm.dtfj.phd.parser.PortableHeapDumpListener) HashMap(java.util.HashMap) LinkedHashMap(java.util.LinkedHashMap) CorruptDataException(com.ibm.dtfj.image.CorruptDataException) ImagePointer(com.ibm.dtfj.image.ImagePointer) JavaReference(com.ibm.dtfj.java.JavaReference) LongEnumeration(com.ibm.dtfj.phd.util.LongEnumeration) Iterator(java.util.Iterator) DataUnavailable(com.ibm.dtfj.image.DataUnavailable) JavaMethod(com.ibm.dtfj.java.JavaMethod) MemoryAccessException(com.ibm.dtfj.image.MemoryAccessException) HashSet(java.util.HashSet) MemoryAccessException(com.ibm.dtfj.image.MemoryAccessException) IOException(java.io.IOException) CorruptDataException(com.ibm.dtfj.image.CorruptDataException) JavaClass(com.ibm.dtfj.java.JavaClass) JavaObject(com.ibm.dtfj.java.JavaObject) JavaClassLoader(com.ibm.dtfj.java.JavaClassLoader) CorruptData(com.ibm.dtfj.image.CorruptData) JavaObject(com.ibm.dtfj.java.JavaObject)

Aggregations

JavaClass (com.ibm.dtfj.java.JavaClass)70 CorruptDataException (com.ibm.dtfj.image.CorruptDataException)40 JavaObject (com.ibm.dtfj.java.JavaObject)39 Iterator (java.util.Iterator)33 JavaClassLoader (com.ibm.dtfj.java.JavaClassLoader)23 CorruptData (com.ibm.dtfj.image.CorruptData)11 ArrayList (java.util.ArrayList)10 DataUnavailable (com.ibm.dtfj.image.DataUnavailable)9 ImagePointer (com.ibm.dtfj.image.ImagePointer)9 MemoryAccessException (com.ibm.dtfj.image.MemoryAccessException)9 CorruptData (com.ibm.dtfj.image.j9.CorruptData)8 JavaReference (com.ibm.dtfj.java.JavaReference)8 JavaField (com.ibm.dtfj.java.JavaField)6 JavaRuntime (com.ibm.dtfj.java.JavaRuntime)6 LongEnumeration (com.ibm.dtfj.phd.util.LongEnumeration)5 JavaMethod (com.ibm.dtfj.java.JavaMethod)4 J9DDRCorruptData (com.ibm.j9ddr.view.dtfj.image.J9DDRCorruptData)4 J9Object (com.ibm.j9ddr.vm29.structure.J9Object)4 LongListReferenceIterator (com.ibm.jvm.dtfjview.heapdump.LongListReferenceIterator)4 ReferenceIterator (com.ibm.jvm.dtfjview.heapdump.ReferenceIterator)4