Examples with CorruptDataException com.ibm.dtfj.image.CorruptDataException used on opensource projects

Example 36 with CorruptDataException

use of com.ibm.dtfj.image.CorruptDataException in project openj9 by eclipse.

the class InfoClassCommand method countClassInstances.

private void countClassInstances() {
    JavaRuntime runtime = ctx.getRuntime();
    Map<JavaClass, ClassStatistics> thisRuntimeClasses = classInstanceCounts.get(runtime);
    final Collection<JavaClass> javaClasses = getRuntimeClasses(runtime);
    long corruptObjectCount = 0;
    long corruptClassCount = 0;
    long corruptClassNameCount = 0;
    Iterator itHeap = runtime.getHeaps();
    while (itHeap.hasNext()) {
        Object heap = itHeap.next();
        if (heap instanceof CorruptData) {
            out.println("[skipping corrupt heap]");
            continue;
        }
        JavaHeap jh = (JavaHeap) heap;
        Iterator itObject = jh.getObjects();
        // Walk through all objects in this heap, accumulating counts and total memory size by class
        while (itObject.hasNext()) {
            Object next = itObject.next();
            // JavaHeap, we don't attempt to count these as instances of known classes).
            if (next instanceof JavaObject) {
                JavaObject jo = (JavaObject) next;
                ClassStatistics stats = null;
                try {
                    // Check whether we found this class in the classloaders walk earlier
                    JavaClass jc = jo.getJavaClass();
                    if (javaClasses.contains(jc)) {
                        stats = thisRuntimeClasses.get(jc);
                    } else {
                        // Class not found in the classloaders, create a statistic for it now, and issue a warning message
                        stats = new ClassStatistics();
                        thisRuntimeClasses.put(jc, stats);
                        String classname;
                        try {
                            classname = jc.getName();
                            out.println("Warning, class: " + classname + " found when walking the heap was missing from classloader walk");
                        } catch (CorruptDataException cde) {
                            corruptClassNameCount++;
                        }
                    }
                    // Increment the statistic for objects of this class (accumulated count and size)
                    stats.incrementCount();
                    try {
                        stats.addToSize(jo.getSize());
                    } catch (CorruptDataException cde) {
                        // bad size, count object as corrupt
                        corruptObjectCount++;
                    }
                } catch (CorruptDataException cde) {
                    corruptClassCount++;
                }
            } else {
                corruptObjectCount++;
            }
        }
    }
    if (corruptObjectCount != 0) {
        out.println("Warning, found " + corruptObjectCount + " corrupt objects during heap walk");
    }
    if (corruptClassCount != 0) {
        out.println("Warning, found " + corruptClassCount + " corrupt class references during heap walk");
    }
    if (corruptClassNameCount != 0) {
        out.println("Warning, found " + corruptClassNameCount + " corrupt class names during heap walk");
    }
}

Example 37 with CorruptDataException

use of com.ibm.dtfj.image.CorruptDataException in project openj9 by eclipse.

the class InfoLockCommand method showJavaUtilConcurrentLocks.

private void showJavaUtilConcurrentLocks() {
    // A map of lock objects and their waiting threads.
    Map locksToThreads = new HashMap();
    JavaRuntime jr = ctx.getRuntime();
    Iterator itThread = jr.getThreads();
    while (itThread.hasNext()) {
        try {
            Object o = itThread.next();
            if (!(o instanceof JavaThread)) {
                continue;
            }
            JavaThread jt = (JavaThread) o;
            if ((jt.getState() & JavaThread.STATE_PARKED) != 0) {
                JavaObject lock = jt.getBlockingObject();
                if (lock != null) {
                    List parkedList = (List) locksToThreads.get(lock);
                    if (parkedList == null) {
                        parkedList = new LinkedList();
                        locksToThreads.put(lock, parkedList);
                    }
                    parkedList.add(jt);
                }
            }
        } catch (CorruptDataException cde) {
            out.println("\nwarning, corrupt data encountered during scan for java.util.concurrent locks...");
            logger.log(Level.FINE, Exceptions.getCorruptDataExceptionString(), cde);
        } catch (DataUnavailable du) {
            out.println("\nwarning, data unavailable encountered during scan for java.util.concurrent locks...");
            logger.log(Level.FINE, Exceptions.getDataUnavailableString(), du);
        }
    }
    out.println("\njava.util.concurrent locks in use...");
    if (locksToThreads.size() == 0) {
        out.println("\t...None.");
        out.println();
    }
    for (Object e : locksToThreads.entrySet()) {
        try {
            Map.Entry entry = (Map.Entry) e;
            JavaObject lock = (JavaObject) entry.getKey();
            List threads = (List) entry.getValue();
            String threadName = "<unowned>";
            JavaThread lockOwnerThread = Utils.getParkBlockerOwner(lock, ctx.getRuntime());
            if (lockOwnerThread != null) {
                threadName = lockOwnerThread.getName();
            } else {
                // If the owning thread has ended we won't find the JavaThread
                // We can still get the owning thread name from the java.lang.Thread object itself.
                JavaObject lockOwnerObj = Utils.getParkBlockerOwnerObject(lock, ctx.getRuntime());
                if (lockOwnerObj != null) {
                    threadName = Utils.getThreadNameFromObject(lockOwnerObj, ctx.getRuntime(), out);
                } else {
                    threadName = "<unknown>";
                }
            }
            if (threads != null && threads.size() > 0) {
                String lockID = Long.toHexString(lock.getID().getAddress());
                ImageThread imageThread = (lockOwnerThread != null ? lockOwnerThread.getImageThread() : null);
                out.println(lock.getJavaClass().getName() + "@0x" + lockID + "\n\tlocked by java thread id: " + ((imageThread != null) ? imageThread.getID() : "<null>") + " name: " + (threadName));
                for (Object t : threads) {
                    JavaThread waiter = (JavaThread) t;
                    out.println("\twaiting thread id: " + waiter.getImageThread().getID() + " name: " + waiter.getName());
                }
            }
        } catch (CorruptDataException cde) {
            out.println("\nwarning, corrupt data encountered during scan for java.util.concurrent locks...");
            logger.log(Level.FINE, Exceptions.getCorruptDataExceptionString(), cde);
        } catch (MemoryAccessException ma) {
            out.println("\nwarning, memory access error encountered during scan for java.util.concurrent locks...");
            logger.log(Level.FINE, Exceptions.getMemoryAccessExceptionString(), ma);
        } catch (DataUnavailable du) {
            out.println("\nwarning, data unavailable encountered during scan for java.util.concurrent locks...");
            logger.log(Level.FINE, Exceptions.getDataUnavailableString(), du);
        }
    }
}

Example 38 with CorruptDataException

use of com.ibm.dtfj.image.CorruptDataException in project openj9 by eclipse.

the class InfoSystemCommand method doCommand.

public void doCommand() {
    try {
        out.println("\nMachine OS:\t" + ctx.getImage().getSystemType());
    } catch (DataUnavailable exc) {
        out.println("\nMachine OS:\t" + "data unavailable");
    } catch (CorruptDataException exc) {
        out.println("\nMachine OS:\t" + "data corrupted");
    }
    Properties imageProperties = ctx.getImage().getProperties();
    if (imageProperties.containsKey("Hypervisor")) {
        out.println("Hypervisor:\t" + imageProperties.getProperty("Hypervisor"));
    }
    try {
        out.println("Machine name:\t" + ctx.getImage().getHostName());
    } catch (DataUnavailable exc) {
        out.println("Machine name:\t" + "data unavailable");
    } catch (CorruptDataException exc) {
        out.println("Machine name:\t" + "data corrupted");
    }
    out.println("Machine IP address(es):");
    try {
        Iterator<?> itIPAddresses = ctx.getImage().getIPAddresses();
        while (itIPAddresses.hasNext()) {
            Object addr = itIPAddresses.next();
            if (addr instanceof InetAddress) {
                out.println("\t\t" + ((InetAddress) addr).getHostAddress());
            } else if (addr instanceof CorruptData) {
                out.println("\t\tdata corrupted");
            }
        }
    } catch (DataUnavailable du) {
        out.println("\t\tdata unavailable");
    }
    try {
        out.println("System memory:\t" + ctx.getImage().getInstalledMemory());
    } catch (DataUnavailable exc) {
        out.println("System memory:\t" + "data unavailable");
    }
    try {
        long createTimeMillis = ctx.getImage().getCreationTime();
        if (createTimeMillis != 0) {
            DateFormat fmt = new SimpleDateFormat("yyyy/MM/dd HH:mm:ss:SSS");
            String createTimeStr = fmt.format(new Date(createTimeMillis));
            out.println("\nDump creation time: " + createTimeStr);
        } else {
            out.println("\nDump creation time: data unavailable");
        }
    } catch (DataUnavailable d) {
        out.println("\nDump creation time: data unavailable");
    }
    // Dump creation time - nanotime - added in DTFJ 1.12
    try {
        long createTimeNanos = ctx.getImage().getCreationTimeNanos();
        if (createTimeNanos != 0) {
            out.println("Dump creation time (nanoseconds): " + createTimeNanos);
        } else {
            out.println("Dump creation time (nanoseconds): data unavailable");
        }
    } catch (DataUnavailable du) {
        out.println("Dump creation time (nanoseconds): data unavailable");
    } catch (CorruptDataException cde) {
        out.println("Dump creation time (nanoseconds): data corrupted");
    }
    out.println("\nJava version:");
    if (ctx.getRuntime() != null) {
        try {
            out.println(ctx.getRuntime().getVersion());
        } catch (CorruptDataException e) {
            out.println("version data corrupted");
        }
    } else {
        out.println("\tmissing, unknown or unsupported JRE");
    }
    // JVM start time - millisecond wall clock - added in DTFJ 1.12
    try {
        long startTimeMillis = ctx.getRuntime().getStartTime();
        if (startTimeMillis != 0) {
            DateFormat fmt = new SimpleDateFormat("yyyy/MM/dd HH:mm:ss:SSS");
            String createTimeStr = fmt.format(new Date(startTimeMillis));
            out.println("\nJVM start time: " + createTimeStr);
        } else {
            out.println("\nJVM start time: data unavailable");
        }
    } catch (DataUnavailable d) {
        out.println("\nJVM start time: data unavailable");
    } catch (CorruptDataException cde) {
        out.println("\nJVM start time (nanoseconds): data corrupted");
    }
    // JVM start time - nanotime - added in DTFJ 1.12
    try {
        long startTimeNanos = ctx.getRuntime().getStartTimeNanos();
        if (startTimeNanos != 0) {
            out.println("JVM start time (nanoseconds): " + startTimeNanos);
        } else {
            out.println("JVM start time (nanoseconds): data unavailable");
        }
    } catch (DataUnavailable du) {
        out.println("JVM start time (nanoseconds): data unavailable");
    } catch (CorruptDataException cde) {
        out.println("JVM start time (nanoseconds): data corrupted");
    }
    boolean kernelSettingPrinted = false;
    for (String name : new String[] { "/proc/sys/kernel/sched_compat_yield", "/proc/sys/kernel/core_pattern", "/proc/sys/kernel/core_uses_pid" }) {
        if (imageProperties.containsKey(name)) {
            if (!kernelSettingPrinted) {
                out.println("\nLinux Kernel Settings:");
            }
            out.println(name + " = " + imageProperties.getProperty(name));
            kernelSettingPrinted = true;
        }
    }
    out.println();
}

Example 39 with CorruptDataException

use of com.ibm.dtfj.image.CorruptDataException in project openj9 by eclipse.

the class JavaRuntimeBuilder method addJavaStackFrame.

/**
 */
public JavaStackFrame addJavaStackFrame(JavaThread javaThread, String className, String classFileName, String methodName, String methodType, String compilationLevel, int lineNumber) throws BuilderFailureException {
    try {
        JCJavaThread jThread = (JCJavaThread) javaThread;
        JCJavaClass jclass = getJavaRuntime().findJavaClass(className);
        if (jclass == null) {
            jclass = new JCJavaClass(getJavaRuntime(), className);
        }
        JCJavaMethod method = new JCJavaMethod(methodName, jclass);
        JCJavaLocation location = new JCJavaLocation(method);
        location.setFilename(classFileName);
        location.setCompilation(compilationLevel);
        location.setLineNumber(lineNumber);
        JCJavaStackFrame stackFrame = new JCJavaStackFrame(jThread, location);
        if ("run".equals(methodName)) {
            /*
				 * Perhaps the type of the thread is the type of the last run() method.
				 * Not strictly accurate if the class was extended without overriding run(). 
				 * Add the object only if the object ID is valid.
				 */
            try {
                JavaObject jo = jThread.getObject();
                if (jo != null) {
                    ImagePointer tid = jo.getID();
                    if (fAddressSpace.isValidAddressID(tid.getAddress())) {
                        JCJavaObject jobject = new JCJavaObject(tid, jclass);
                        jThread.setObject(jobject);
                    }
                }
            } catch (CorruptDataException e) {
            // Ignore
            }
        }
        return stackFrame;
    } catch (JCInvalidArgumentsException e) {
        throw new BuilderFailureException(e);
    }
}

Example 40 with CorruptDataException

use of com.ibm.dtfj.image.CorruptDataException in project openj9 by eclipse.

the class JavaThread method getPriority.

/* (non-Javadoc)
	 * @see com.ibm.dtfj.java.JavaThread#getPriority()
	 */
public int getPriority() throws CorruptDataException {
    JavaObject theObject = getObject();
    if (null != theObject) {
        JavaClass threadClass = _javaLangThreadSuperclass();
        Iterator fields = threadClass.getDeclaredFields();
        while (fields.hasNext()) {
            JavaField oneField = (JavaField) fields.next();
            if (oneField.getName().equals("priority")) {
                try {
                    return oneField.getInt(theObject);
                } catch (MemoryAccessException e) {
                    throw new CorruptDataException(new CorruptData("unable to read memory for 'priority' field", null));
                }
            }
        }
        throw new CorruptDataException(new CorruptData("unable to find 'priority' field", null));
    } else {
        // TODO:  have a good exception for this sort of thing
        return -1;
    }
}