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

Example 26 with JavaObject

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

the class PHDJavaRuntime method prepClassLoaders.

/**
 * Remember objects associated with class loaders
 * Performance optimization - we can then find these objects on a scan through the heap
 * and remember them, saving a fruitless search of the heap if they only exist in a javacore.
 */
private void prepClassLoaders() {
    if (metaJavaRuntime != null) {
        final PHDJavaClassLoader boot = loaders.get(null);
        for (Iterator it = metaJavaRuntime.getJavaClassLoaders(); it.hasNext(); ) {
            Object next = it.next();
            if (next instanceof CorruptData)
                continue;
            JavaClassLoader load = (JavaClassLoader) next;
            try {
                JavaObject jo = load.getObject();
                saveExtraObject(boot, jo);
            } catch (CorruptDataException e) {
            }
        }
    }
}

Example 27 with JavaObject

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

the class PHDJavaRuntime method saveExtraObject.

private void saveExtraObject(final PHDJavaClassLoader boot, JavaObject jo) {
    if (jo != null) {
        long addr = jo.getID().getAddress();
        JavaClass cls;
        try {
            cls = boot.findClassUnique(jo.getJavaClass().getName());
        } catch (CorruptDataException e) {
            cls = null;
        }
        // Construct a dummy object with little information in case the object is not in the heap
        JavaObject jo2 = new PHDJavaObject.Builder(heaps.get(0), addr, cls, PHDJavaObject.NO_HASHCODE, -1).refsAsArray(NOREFS, 0).length(PHDJavaObject.UNKNOWN_TYPE).build();
        extraObjectsCache.put(addr, jo2);
    }
}

Example 28 with JavaObject

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

the class Utils method getVal.

// note: this method lets you pass in a null JavaObject, but it _will_ throw a
// NullPointerException if the JavaField is not a static field when you pass it
// a null JavaObject; this is the behavior of jf.get() and jf.getString()
public static String getVal(JavaObject jo, JavaField jf) {
    Object o;
    String s;
    if (null == jf) {
        o = jo;
        s = null;
    } else {
        try {
            o = jf.get(jo);
        } catch (CorruptDataException e) {
            return "<corrupt data>";
        } catch (MemoryAccessException d) {
            return "<invalid memory address>";
        } catch (NumberFormatException nfe) {
            return "<invalid number>";
        }
        try {
            s = jf.getString(jo);
        } catch (CorruptDataException e) {
            s = null;
        } catch (MemoryAccessException e) {
            s = null;
        } catch (IllegalArgumentException e) {
            s = null;
        }
    }
    return getVal(o, s, jf);
}

Example 29 with JavaObject

use of com.ibm.dtfj.java.JavaObject 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 30 with JavaObject

use of com.ibm.dtfj.java.JavaObject 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;
        }
    }
}