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

Example 66 with JavaObject

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

the class WhatisCommand method checkClassInRange.

/*	TODO: need to implement some output for this method and use it
	private void checkMonitorInRange(Iterator monitors){
		while(monitors.hasNext()){
			JavaMonitor jMonitor = (JavaMonitor)monitors.next();
			//TODO: need API for retrieving monitor ID (address)
			//sb.append("\n" + "monitor object id: " + jMonitor.getObject().getID().getAddress());
		}
	}
*/
private void checkClassInRange(Iterator objects, long bound, long address) {
    long startAddress, endAddress;
    while (objects.hasNext()) {
        JavaObject jObject = (JavaObject) objects.next();
        JavaClass jClass;
        String className;
        try {
            jClass = jObject.getJavaClass();
            className = jClass.getName();
        } catch (CorruptDataException cde) {
            // TODO exception handling
            continue;
        }
        startAddress = jClass.getID().getAddress();
        endAddress = startAddress + bound;
        if (address == startAddress) {
            out.print("\t0x" + Long.toHexString(address) + " is the address of the java/lang/Class object for " + className);
            return;
        }
        if (isWithinRange(startAddress, endAddress, address)) {
            out.print("0x" + Long.toHexString(address) + " is within the java/lang/Class object for " + className);
            return;
        }
    }
}

Example 67 with JavaObject

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

the class InfoLockCommand method showSystemLocks.

private void showSystemLocks() {
    Vector vMonitorsWithLockedObjects = new Vector();
    JavaRuntime jRuntime = ctx.getRuntime();
    Iterator monitors = jRuntime.getMonitors();
    out.println("\nSystem locks...");
    while (monitors.hasNext()) {
        JavaMonitor jMonitor = (JavaMonitor) monitors.next();
        JavaObject jObject = jMonitor.getObject();
        try {
            String monitorName = jMonitor.getName().trim();
            if (monitorName.equalsIgnoreCase("")) {
                monitorName = "<un-named monitor>";
            }
            out.println("id: 0x" + jMonitor.getID() + " name: " + jMonitor.getName());
            JavaThread owner = jMonitor.getOwner();
            if (null != owner) {
                try {
                    out.println("\towner thread id: " + owner.getImageThread().getID() + " name: " + owner.getName());
                } catch (DataUnavailable e) {
                    out.println("\towner thread id: " + Exceptions.getDataUnavailableString());
                    logger.log(Level.FINE, Exceptions.getDataUnavailableString(), e);
                }
            }
            showWaiters(jMonitor);
        } catch (CorruptDataException cde) {
            out.println("\nwarning, corrupt data encountered during scan for system locks...");
        }
        if (null != jObject) {
            // Remember object monitors (flat or inflated) for later
            vMonitorsWithLockedObjects.add(jMonitor);
        }
    }
    showLockedObjects(vMonitorsWithLockedObjects);
}

Example 68 with JavaObject

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

the class InfoLockCommand method showLockedObjects.

private void showLockedObjects(Vector vMonitorsWithLockedObjects) {
    out.println("\nObject Locks in use...");
    if (0 == vMonitorsWithLockedObjects.size()) {
        out.println("\t...None.");
        return;
    }
    Iterator lockedObjects = vMonitorsWithLockedObjects.iterator();
    while (lockedObjects.hasNext()) {
        JavaMonitor jMonitor = (JavaMonitor) lockedObjects.next();
        JavaObject jObject = jMonitor.getObject();
        try {
            JavaThread owner = jMonitor.getOwner();
            String className = "<unknown class>";
            JavaClass jClass = jObject.getJavaClass();
            if (null != jClass) {
                className = jClass.getName();
            }
            String jObjectID = Long.toHexString(jObject.getID().getAddress());
            if (null == owner) {
                out.println(className + "@0x" + jObjectID);
            } else {
                String owningThreadID = null;
                try {
                    owningThreadID = owner.getImageThread().getID();
                } catch (DataUnavailable e) {
                    owningThreadID = Exceptions.getDataUnavailableString();
                }
                out.println(className + "@0x" + jObjectID);
                out.println("\towner thread id: " + owningThreadID + " name: " + owner.getName());
            }
            showWaiters(jMonitor);
        } catch (CorruptDataException cde) {
            logger.log(Level.FINE, Exceptions.getCorruptDataExceptionString(), cde);
        }
    }
}

Example 69 with JavaObject

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

the class XJCommand method printObjectsFromName.

private void printObjectsFromName(JavaHeap jh, String objName, PrintStream out, boolean supers, JavaRuntime jr) {
    if (objName != null) {
        JavaClass[] classes = Utils.getClassGivenName(objName, jr, out);
        // still be an array type or it might not exist
        if (classes == null || classes.length == 0) {
            out.print("\t  could not find class with name \"" + objName + "\"\n\n");
            return;
        }
        for (int i = 0; i < classes.length; i++) {
            boolean foundInstance = false;
            JavaClass objClass = classes[i];
            if (classes.length > 1) {
                ClassOutput.printRuntimeClassAndLoader(objClass, out);
            }
            ClassOutput.printStaticFields(objClass, out);
            Iterator<?> itObject = jh.getObjects();
            int corruptObjectCount = 0;
            while (itObject.hasNext()) {
                Object obj = itObject.next();
                if (obj instanceof CorruptData) {
                    // skip the corrupt object
                    corruptObjectCount++;
                    continue;
                }
                JavaObject jo = (JavaObject) obj;
                String hierarchy = "";
                JavaClass jc;
                try {
                    jc = jo.getJavaClass();
                } catch (CorruptDataException e) {
                    out.print("\t  <error getting class while traversing objects: ");
                    out.print(Exceptions.getCorruptDataExceptionString());
                    out.print(">\n");
                    jc = null;
                }
                boolean foundSuperclass = false;
                while (jc != null && !foundSuperclass) {
                    String className;
                    try {
                        className = jc.getName();
                    } catch (CorruptDataException e) {
                        out.print("\t  <error getting class name while traversing objects: ");
                        out.print(Exceptions.getCorruptDataExceptionString());
                        out.print(">\n");
                        jc = null;
                        continue;
                    }
                    if (hierarchy.equals("")) {
                        hierarchy = className;
                    } else {
                        hierarchy = className + " => " + hierarchy;
                    }
                    if (jc.equals(objClass)) {
                        foundInstance = true;
                        foundSuperclass = true;
                        out.print("\t  ");
                        out.print(hierarchy);
                        out.print(" @ ");
                        out.print(Utils.toHex(jo.getID().getAddress()));
                        out.print("\n");
                        ClassOutput.printFields(jo, jc, jr, out);
                        printReferences(jo, out);
                    } else {
                        if (supers) {
                            try {
                                jc = jc.getSuperclass();
                            } catch (CorruptDataException e) {
                                out.print("\t  <error getting superclass while traversing objects: ");
                                out.print(Exceptions.getCorruptDataExceptionString());
                                out.print(">\n");
                                jc = null;
                            }
                        } else {
                            jc = null;
                        }
                    }
                }
            }
            if (!foundInstance) {
                out.print("\t  <no object of class \"");
                out.print(objName);
                out.print("\" exists>\n\n");
            }
            if (corruptObjectCount != 0) {
                out.println("\t Warning : " + corruptObjectCount + " corrupt objects were skipped\n");
            }
        }
    }
}

Example 70 with JavaObject

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

the class XJCommand method printObjectsFromAddress.

private void printObjectsFromAddress(JavaHeap jh, Long objAddress, PrintStream out, JavaRuntime jr) {
    JavaObject jo;
    Iterator<?> itObject = jh.getObjects();
    boolean found = false;
    boolean done = false;
    int corruptObjectCount = 0;
    while (itObject.hasNext() && !done) {
        Object obj = itObject.next();
        if (obj instanceof CorruptData) {
            // skip the corrupt object
            corruptObjectCount++;
            continue;
        }
        jo = (JavaObject) obj;
        if (jo.getID().getAddress() == objAddress.longValue()) {
            JavaClass jc;
            found = true;
            out.print("\t  ");
            try {
                jc = jo.getJavaClass();
            } catch (CorruptDataException e) {
                out.print("\t  <error getting class while traversing objects: ");
                out.print(Exceptions.getCorruptDataExceptionString());
                out.print(">");
                jc = null;
            }
            if (null != jc) {
                try {
                    out.print(jc.getName());
                } catch (CorruptDataException e) {
                    out.print("\t  <error getting class name while traversing objects: ");
                    out.print(Exceptions.getCorruptDataExceptionString());
                    out.print(">");
                }
                out.print(" @ ");
                out.print(Utils.toHex(objAddress.longValue()));
                out.print("\n");
                ClassOutput.printFields(jo, jc, jr, out);
                printReferences(jo, out);
                // assumes only one object can exist at a specific memory address
                done = true;
            }
        }
    }
    if (!found) {
        out.print("\t  <no object found at address ");
        out.print(Utils.toHex(objAddress.longValue()));
        out.print(">\n\n");
    }
    if (corruptObjectCount != 0) {
        out.println("\t Warning : " + corruptObjectCount + " corrupt objects were skipped\n");
    }
}