Examples with JavaClass com.ibm.dtfj.java.JavaClass used on opensource projects

Example 21 with JavaClass

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

the class Utils method getClassGivenName.

public static JavaClass[] getClassGivenName(String className, JavaRuntime jr, PrintStream out) {
    Iterator itJavaClassLoader = jr.getJavaClassLoaders();
    List classes = new ArrayList();
    while (itJavaClassLoader.hasNext()) {
        Object nextCl = itJavaClassLoader.next();
        if (!(nextCl instanceof JavaClassLoader)) {
            continue;
        }
        JavaClassLoader jcl = (JavaClassLoader) nextCl;
        Iterator itJavaClass = jcl.getDefinedClasses();
        while (itJavaClass.hasNext()) {
            Object next = itJavaClass.next();
            if (!(next instanceof JavaClass)) {
                continue;
            }
            JavaClass jc = (JavaClass) next;
            String currClassName;
            try {
                currClassName = jc.getName();
                if (currClassName.equals(className)) {
                    classes.add(jc);
                }
            } catch (CorruptDataException e) {
                out.print("\t  <error getting class name while traversing classes: ");
                out.print(Exceptions.getCorruptDataExceptionString());
                out.print(">\n");
                currClassName = null;
            }
        }
    }
    if (classes.size() > 0) {
        return (JavaClass[]) classes.toArray(new JavaClass[0]);
    } else {
        return null;
    }
}

Example 22 with JavaClass

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

the class Utils method getVal.

public static String getVal(Object o, String str, JavaField jf) {
    String val = "";
    Long value = null;
    boolean object = false;
    if (null == o) {
        val += "null";
    } else {
        if (o instanceof Boolean) {
            val += ((Boolean) o).toString();
        } else if (o instanceof Byte) {
            byte b = ((Byte) o).byteValue();
            val += String.valueOf(b);
            value = new Long((new Byte(b)).longValue());
        } else if (o instanceof Character) {
            char c = ((Character) o).charValue();
            val += Utils.getPrintableWithQuotes(c);
            value = new Long((new Integer((int) c).longValue()));
        } else if (o instanceof Double) {
            double d = ((Double) o).doubleValue();
            val += String.valueOf(d);
            value = new Long(Double.doubleToRawLongBits(d));
        } else if (o instanceof Float) {
            float f = ((Float) o).floatValue();
            val += String.valueOf(f);
            value = new Long(Float.floatToRawIntBits(f));
        } else if (o instanceof Integer) {
            int i = ((Integer) o).intValue();
            val += String.valueOf(i);
            value = new Long((new Integer(i)).longValue());
        } else if (o instanceof Long) {
            long l = ((Long) o).longValue();
            val += String.valueOf(l);
            value = new Long(l);
        } else if (o instanceof Short) {
            short s = ((Short) o).shortValue();
            val += String.valueOf(s);
            value = new Long((new Short(s)).longValue());
        } else if (o instanceof String) {
            val += (String) o;
        } else if (o instanceof JavaObject) {
            if (Utils.isNull((JavaObject) o)) {
                val += "null";
            } else {
                object = true;
            }
        } else {
        // FIXME
        }
        // because we want control over the exceptions that are thrown
        if (object) {
            JavaObject joField = (JavaObject) o;
            JavaClass jcField;
            String jcName;
            try {
                jcField = joField.getJavaClass();
            } catch (CorruptDataException e) {
                jcField = null;
            }
            try {
                if (null != jcField) {
                    jcName = jcField.getName();
                } else {
                    jcName = null;
                }
            } catch (CorruptDataException e) {
                jcName = null;
            }
            if (null != jcName && jcName.equals("java/lang/String")) {
                if (null == str) {
                    val += getStringVal(joField);
                } else {
                    val += "\"" + Utils.getPrintable(str) + "\"";
                }
                val += " @ ";
                val += Utils.toHex(joField.getID().getAddress());
            } else {
                val += "<object>" + " @ " + Utils.toHex(joField.getID().getAddress());
            }
        }
    }
    if (null != value) {
        val += " (";
        val += Utils.toHex(value.longValue());
        val += ")";
    }
    return val;
}

Example 23 with JavaClass

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

the class Utils method getClassGivenAddress.

public static JavaClass getClassGivenAddress(long address, JavaRuntime jr) {
    Iterator itJavaClassLoader = jr.getJavaClassLoaders();
    while (itJavaClassLoader.hasNext()) {
        Object nextCl = itJavaClassLoader.next();
        if (!(nextCl instanceof JavaClassLoader)) {
            continue;
        }
        JavaClassLoader jcl = (JavaClassLoader) nextCl;
        Iterator itJavaClass = jcl.getDefinedClasses();
        while (itJavaClass.hasNext()) {
            Object next = itJavaClass.next();
            if (!(next instanceof JavaClass)) {
                continue;
            }
            if (next instanceof JavaClass) {
                JavaClass jc = (JavaClass) next;
                long currClassAddress = jc.getID().getAddress();
                if (currClassAddress == address) {
                    return jc;
                }
            }
        }
    }
    return null;
}

Example 24 with JavaClass

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

the class HeapdumpCommand method dumpHeap.

/**
 * Walks the supplied heap and passes the artifacts through the formatter
 */
private void dumpHeap(HeapDumpFormatter formatter, JavaHeap thisHeap) throws IOException {
    Iterator objectIterator = thisHeap.getObjects();
    while (objectIterator.hasNext()) {
        Object next = objectIterator.next();
        _numberOfObjects++;
        if (next instanceof CorruptData) {
            _numberOfErrors++;
            reportError("Corrupt object data found at " + ((CorruptData) next).getAddress() + " while walking heap " + thisHeap.getName(), null);
            continue;
        }
        try {
            JavaObject thisObject = (JavaObject) next;
            if (thisObject.getJavaClass().getName().equals("java/lang/Class")) {
                // heap classes are handled separately, in dumpClasses()
                continue;
            }
            JavaClass thisClass = thisObject.getJavaClass();
            JavaObject thisClassObject = thisClass.getObject();
            int hashcode = 0;
            if (_is32BitHash) {
                // JVMs from 2.6 on, optional 32-bit hashcodes, if object was hashed
                try {
                    hashcode = (int) thisObject.getPersistentHashcode();
                } catch (DataUnavailable ex) {
                // no persistent hashcode for this object, pass hashcode=0 to the heapdump formatter
                }
            } else {
                // JVMs prior to 2.6, all objects should have a 16-bit hashcode
                try {
                    hashcode = (int) thisObject.getHashcode();
                } catch (DataUnavailable ex) {
                    _numberOfErrors++;
                    reportError("Failed to get hashcode for object: " + thisObject.getID(), ex);
                }
            }
            if (thisObject.isArray()) {
                if (isPrimitive(thisClass.getComponentType())) {
                    formatter.addPrimitiveArray(thisObject.getID().getAddress(), thisClassObject.getID().getAddress(), getPrimitiveTypeCode(thisClass.getComponentType()), thisObject.getSize(), hashcode, thisObject.getArraySize());
                } else {
                    formatter.addObjectArray(thisObject.getID().getAddress(), thisClassObject.getID().getAddress(), thisClass.getName(), thisClass.getComponentType().getObject().getID().getAddress(), thisClass.getComponentType().getName(), thisObject.getSize(), thisObject.getArraySize(), hashcode, getObjectReferences(thisObject));
                }
            } else {
                formatter.addObject(thisObject.getID().getAddress(), thisClassObject.getID().getAddress(), thisClass.getName(), (int) thisObject.getSize(), hashcode, getObjectReferences(thisObject));
            }
        } catch (CorruptDataException ex) {
            _numberOfErrors++;
            reportError(null, ex);
            continue;
        }
    }
}

Example 25 with JavaClass

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

the class Utils method getThreadNameFromObject.

public static String getThreadNameFromObject(JavaObject lockOwnerObj, JavaRuntime rt, PrintStream out) throws CorruptDataException, MemoryAccessException {
    if (lockOwnerObj == null) {
        return null;
    }
    JavaClass[] threadClasses = Utils.getClassGivenName("java/lang/Thread", rt, out);
    // We might have got no classes or more than one. Both of which should be pretty hard to manage.
    if (threadClasses.length == 1) {
        Iterator fields = threadClasses[0].getDeclaredFields();
        while (fields.hasNext()) {
            Object o = fields.next();
            if (!(o instanceof JavaField)) {
                continue;
            }
            JavaField f = (JavaField) o;
            if ("name".equalsIgnoreCase(f.getName())) {
                return f.getString(lockOwnerObj);
            }
        }
    }
    return null;
}