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

Example 31 with DataUnavailable

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

the class ImageStackFrameTest method loadTestObjects.

protected void loadTestObjects(JavaRuntime ddrRuntime, List<Object> ddrObjects, JavaRuntime jextractRuntime, List<Object> jextractObjects) {
    // Extract stack frames from all threads
    List<Object> ddrThreads = new LinkedList<Object>();
    List<Object> jextractThreads = new LinkedList<Object>();
    Comparator<Object> c = new Comparator<Object>() {

        public int compare(Object o1, Object o2) {
            if (o1 instanceof ImageThread && o2 instanceof ImageThread) {
                ImageThread t1 = (ImageThread) o1;
                ImageThread t2 = (ImageThread) o2;
                try {
                    return t1.getID().compareTo(t2.getID());
                } catch (CorruptDataException e) {
                    return 0;
                }
            } else {
                return 0;
            }
        }
    };
    fillLists(ddrThreads, ddrProcess.getThreads(), jextractThreads, jextractProcess.getThreads(), c);
    assertEquals("Different numbers of threads", jextractThreads.size(), ddrThreads.size());
    Collections.sort(ddrThreads, c);
    Collections.sort(jextractThreads, c);
    for (int i = 0; i != ddrThreads.size(); i++) {
        ImageThread ddrThreadObj = (ImageThread) ddrThreads.get(i);
        ImageThread jextractThreadObj = (ImageThread) jextractThreads.get(i);
        Exception ddrException = null;
        Exception jextractException = null;
        try {
            Iterator<?> it = ddrThreadObj.getStackFrames();
            slurpIterator(it, ddrObjects);
        } catch (DataUnavailable e) {
            e.printStackTrace();
            ddrException = e;
        }
        try {
            Iterator<?> it = jextractThreadObj.getStackFrames();
            slurpIterator(it, jextractObjects);
        } catch (DataUnavailable e) {
            e.printStackTrace();
            jextractException = e;
        }
        if (ddrException != null || jextractException != null) {
            if (ddrException != null && jextractException != null) {
                assertEquals("JExtract and DDR threw different exceptions", jextractException.getClass(), ddrException.getClass());
            } else {
                if (ddrException != null) {
                    fail("DDR threw an exception and jextract didn't");
                } else {
                    fail("Jextract threw an exception and DDR didn't");
                }
            }
        }
    }
}

Example 32 with DataUnavailable

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

the class DTFJMethod method handleException.

/**
 * Handle an exception thrown by the DTFJ API.
 *
 * @param cmd the command current executing the API. This is required to provide access to context information.
 * @param cause exception to be handled
 * @return textual data to be written out
 */
public static String handleException(BaseJdmpviewCommand cmd, Throwable cause) {
    ctx = cmd.ctx;
    StringBuffer sb = new StringBuffer();
    // Try and determine the artifact type
    StackTraceElement[] myStack = cause.getStackTrace();
    ArtifactType artifactType = cmd.getArtifactType();
    String artifactTypeName = null;
    switch(artifactType) {
        case core:
            artifactTypeName = "core";
            break;
        case javacore:
            artifactTypeName = "javacore";
            break;
        case phd:
            artifactTypeName = "phd";
            break;
        default:
            artifactTypeName = "Unknown artifact type";
            break;
    }
    // Let's find out which DTFJ Class/Method was being used
    DTFJMethod dMethod = getDTFJMethod(myStack, cmd);
    if (cause instanceof DataUnavailable) {
        if (dMethod == null) {
            sb.append("Could not determine DTFJ class/method that caused this exception: ");
            sb.append(cause.getLocalizedMessage());
        } else if (dMethod.isSupported(artifactType) == WORKS) {
            sb.append(dMethod.getClassName());
            sb.append(".");
            sb.append(dMethod.getMethodname());
            sb.append(" should have worked for a ");
            sb.append(artifactTypeName);
            sb.append(" but returned: ");
            sb.append(cause.getLocalizedMessage());
        } else if (dMethod.isSupported(artifactType) == CAN_FAIL) {
            sb.append(dMethod.getClassName());
            sb.append(".");
            sb.append(dMethod.getMethodname());
            sb.append(" can fail for a ");
            sb.append(artifactTypeName);
            sb.append(" which is why it returned: ");
            sb.append(cause.getLocalizedMessage());
        } else if (dMethod.isSupported(artifactType) == FAILS) {
            sb.append(dMethod.getClassName());
            sb.append(".");
            sb.append(dMethod.getMethodname());
            sb.append(" is not supported for a ");
            sb.append(artifactTypeName);
            String s = cause.getLocalizedMessage();
            if (s != null) {
                sb.append(" causing: ");
                sb.append(s);
            }
        }
    } else if (cause instanceof CorruptDataException) {
        CorruptData corruptData = ((CorruptDataException) cause).getCorruptData();
        ImagePointer ip = corruptData.getAddress();
        if (ip == null) {
            sb.append("CorruptData found in dump at unknown address executing ");
            if (dMethod == null) {
                sb.append("an unknown class/method that caused this exception: ");
                sb.append(cause.getLocalizedMessage());
            } else {
                sb.append(dMethod.getClassName());
                sb.append(".");
                sb.append(dMethod.getMethodname());
            }
        } else {
            String addr = cmd.toHexStringAddr(ip.getAddress());
            sb.append("CorruptData found in dump at address: ");
            sb.append(addr);
            sb.append(" causing: ");
            sb.append(cause.getLocalizedMessage());
            if (dMethod != null) {
                sb.append(" executing ");
                sb.append(dMethod.getClassName());
                sb.append(".");
                sb.append(dMethod.getMethodname());
            }
        }
    } else if (cause instanceof MemoryAccessException) {
        sb.append(cause.getLocalizedMessage());
    } else if (cause instanceof IllegalArgumentException) {
        sb.append(cause.getLocalizedMessage());
    } else {
        // If we are here then something bad has really happened
        // This is just debug code to help determine other problems this
        // method has to deal with
        sb.append("==========> Unexpected exception " + cause.getClass().getName() + " thrown: " + cause.getLocalizedMessage());
        StringWriter st = new StringWriter();
        cause.printStackTrace(new PrintWriter(st));
        sb.append(st.toString());
    }
    return sb.toString();
}

Example 33 with DataUnavailable

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

the class DDRLibraryAdapter method constructLibraryList.

/**
 * Constructs the list of libraries required using the DDR implementation of the DTFJ Image* API.
 * This ensures that the correct classloading is used for determining which libraries to collect.
 * @param coreFile core file to process
 */
@SuppressWarnings({ "unchecked" })
private void constructLibraryList(final File coreFile) {
    moduleNames = new ArrayList<String>();
    ImageFactory factory = new J9DDRImageFactory();
    final Image image;
    final boolean isAIX;
    try {
        image = factory.getImage(coreFile);
        isAIX = image.getSystemType().toLowerCase().startsWith("aix");
    } catch (IOException e) {
        logger.log(SEVERE, "Could not open core file", e);
        errorMessages.add(e.getMessage());
        return;
    } catch (CorruptDataException e) {
        logger.log(SEVERE, "Could not determine system type", e);
        errorMessages.add(e.getMessage());
        return;
    } catch (DataUnavailable e) {
        logger.log(SEVERE, "Could not determine system type", e);
        errorMessages.add(e.getMessage());
        return;
    }
    for (Iterator spaces = image.getAddressSpaces(); spaces.hasNext(); ) {
        ImageAddressSpace space = (ImageAddressSpace) spaces.next();
        for (Iterator procs = space.getProcesses(); procs.hasNext(); ) {
            ImageProcess proc = (ImageProcess) procs.next();
            try {
                // add the executable to the list of libraries to be collected
                ImageModule exe = proc.getExecutable();
                moduleNames.add(exe.getName());
                for (Iterator libraries = proc.getLibraries(); libraries.hasNext(); ) {
                    ImageModule module = (ImageModule) libraries.next();
                    String key = null;
                    try {
                        // handle CDE thrown by getName(), as this is required further on this call needs to succeed
                        if (isAIX) {
                            key = module.getName();
                            // check on AIX if module is the .a file or library
                            int pos = key.indexOf(".a(");
                            if ((pos != -1) && (key.lastIndexOf(')') == key.length() - 1)) {
                                key = key.substring(0, pos + 2);
                            }
                        } else {
                            key = module.getName();
                        }
                        logger.fine("Module : " + key);
                        if (!moduleNames.contains(key)) {
                            // don't store duplicate libraries
                            moduleNames.add(key);
                        }
                    } catch (Exception e) {
                        logger.log(WARNING, "Error getting module name", e);
                    }
                }
            } catch (DataUnavailable e) {
                logger.log(WARNING, "Error getting library list", e);
                errorMessages.add(e.getMessage());
            } catch (com.ibm.dtfj.image.CorruptDataException e) {
                logger.log(WARNING, "Error getting library list", e);
                errorMessages.add(e.getMessage());
            }
        }
    }
}

Example 34 with DataUnavailable

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

the class J9DDRImageProcess method getEnvironment.

/**
 * This method gets the environment variables.
 * First it tries to extract it from RAS structure.
 * If not, it tries to get it from loaded modules.
 * @return Properties instance of environment variables.
 * @throws DataUnavailable
 * @throws CorruptDataException
 */
public Properties getEnvironment() throws DataUnavailable, CorruptDataException {
    try {
        checkFailureInfo();
        if (j9rasProcessData != null) {
            try {
                Properties properties;
                long environ = j9rasProcessData.getEnvironment();
                if (process.getPlatform() == Platform.WINDOWS && j9rasProcessData.version() > 4) {
                    // Get the env vars from an environment strings block instead of the environ global
                    properties = EnvironmentUtils.readEnvironmentStrings(process, environ);
                } else {
                    long stringPointer = process.getPointerAt(environ);
                    properties = EnvironmentUtils.readEnvironment(process, stringPointer);
                }
                if ((null == properties) || (0 == properties.size())) {
                    /* In the case of env vars is null or empty, 
						 * throw exception so that it tries to get env vars from modules 
						 */
                    throw new com.ibm.j9ddr.CorruptDataException("");
                }
                return properties;
            } catch (com.ibm.j9ddr.CorruptDataException e1) {
                /* Seems like RAS structure is corrupted. Try to get it from modules. */
                return process.getEnvironmentVariables();
            }
        } else {
            /* We don't have a J9RAS structure to work with. Try to get it from modules. */
            return process.getEnvironmentVariables();
        }
    } catch (com.ibm.j9ddr.CorruptDataException e) {
        throw new DTFJCorruptDataException(process, e);
    } catch (DataUnavailableException e) {
        throw new DataUnavailable(e.getMessage());
    }
}

Example 35 with DataUnavailable

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

the class J9DDRImageProcess method getCurrentThread.

/**
 * This method returns the ImageThread that matches the TID stored in the J9RAS data structure,
 *  or
 *  case 1: if no J9RAS structure available return null
 *  case 2: if J9RAS structure available but no TID field (old JVMs, old jextract behaviour)
 *  		- return the first thread, or null if no threads
 *  case 3: if J9RAS structure available with TID field but TID is zero (eg dump triggered outside JVM)
 *  		- platform specific code if core readers have identified a current thread, else...
 *  case 4: if J9RAS structure available with TID field but no match (eg Linux), return a stub ImageThread
 *
 * @return ImageThread
 * @throws {@link CorruptDataException}
 */
public ImageThread getCurrentThread() throws CorruptDataException {
    try {
        checkFailureInfo();
        if (j9rasProcessData != null) {
            long currentThreadId;
            try {
                currentThreadId = j9rasProcessData.tid();
            } catch (DataUnavailable e) {
                // JExtract currently just takes first thread as we do here
                for (IOSThread thread : process.getThreads()) {
                    return new J9DDRImageThread(process, thread);
                }
                return null;
            }
            for (IOSThread thread : process.getThreads()) {
                if (thread.getThreadId() == currentThreadId) {
                    return new J9DDRImageThread(process, thread);
                }
            }
            if (currentThreadId == 0) {
                // for a thread with a non-zero Task Completion Code. There may be more we can do here for Win/Linux/AIX
                if (process.getPlatform() == Platform.ZOS) {
                    for (IOSThread thread : process.getThreads()) {
                        Properties threadProps = thread.getProperties();
                        String tcc = threadProps.getProperty("Task Completion Code");
                        if (tcc != null && !tcc.equals("0x0")) {
                            return new J9DDRImageThread(process, thread);
                        }
                    }
                }
            }
            // We cannot match the native thread at this point, so provide a stub based on the information in the RAS structure.
            return new J9DDRStubImageThread(process, currentThreadId);
        } else {
            return null;
        }
    } catch (com.ibm.j9ddr.CorruptDataException e) {
        throw new DTFJCorruptDataException(process, e);
    }
}