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

Example 46 with CorruptDataException

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

the class HeapdumpCommand method getVersionString.

/**
 * DTFJ for dumps prior to JVM 2.6 provides multi-line version information. This method extracts the second line, eg:
 *		"IBM J9 VM(JRE 1.6.0 IBM J9 2.4 Windows 7 amd64-64 jvmwa6460sr17-20140620_203740 (JIT enabled, AOT enabled)"
 * DTFJ for dumps from JVM 2.6 and later provide just a single-line version, for example:
 *		"JRE 1.6.0 Windows 7 amd64-64 build 20111101_93964 (pwa6460_26sr1-20111103_01(SR1))"
 */
private String getVersionString(JavaRuntime runtime) {
    try {
        String rawVersion = runtime.getVersion();
        Matcher matcher = J9_VERSION_PATTERN.matcher(rawVersion);
        if (matcher.find()) {
            // dump prior to JVM 2.6, extract single line version string
            String minimalVersion = matcher.group(1);
            return minimalVersion;
        } else {
            // dump from JVM 2.6 or later, return unchanged version string
            return rawVersion;
        }
    } catch (CorruptDataException e) {
        _numberOfErrors++;
        out.println("Could not read version string from dump: data corrupted at " + e.getCorruptData().getAddress());
        return "*Corrupt*";
    }
}

Example 47 with CorruptDataException

use of com.ibm.dtfj.image.CorruptDataException 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 48 with CorruptDataException

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

the class HexdumpCommand method doCommand.

public void doCommand(String[] args) {
    StringBuffer stringBuffer = new StringBuffer();
    ImageAddressSpace imageAddressSpace = ctx.getAddressSpace();
    if (null == imageAddressSpace) {
        out.println("Could not find an address space which contains a process in this core file");
        return;
    }
    long addressInDecimal = 0;
    // dump 256 bytes by default
    int numBytesToPrint = 16 * 16;
    int asciiIndex = 0;
    if (args.length != 0) {
        Long address = Utils.longFromString(args[0]);
        if (null == address) {
            out.println("Specified address is invalid");
            return;
        }
        addressInDecimal = address.longValue();
    } else {
        out.println("\"hexdump\" requires at least an address parameter");
        return;
    }
    if (args.length > 1) {
        try {
            numBytesToPrint = Integer.parseInt(args[1]);
        } catch (NumberFormatException nfe) {
            out.println("Specified length is invalid");
            return;
        }
    }
    ImagePointer imagePointerBase = imageAddressSpace.getPointer(addressInDecimal);
    boolean is_zOSdump = false;
    try {
        is_zOSdump = ctx.getImage().getSystemType().toLowerCase().indexOf("z/os") >= 0;
    } catch (DataUnavailable e1) {
    // unable to get the dump OS type, continue without the additional zOS EBCDIC option
    } catch (CorruptDataException e1) {
    // unable to get the dump OS type, continue without the additional zOS EBCDIC option
    }
    String asciiChars = "";
    String ebcdicChars = "";
    long i;
    for (i = 0; i < numBytesToPrint; i++) {
        ImagePointer imagePointer = imagePointerBase.add(i);
        // stringBuffer.append(Long.toHexString(imagePointer.getAddress())+":\t");
        try {
            Byte byteValue = new Byte(imagePointer.getByteAt(0));
            asciiIndex = (int) byteValue.byteValue();
            if (asciiIndex < 0) {
                asciiIndex += 256;
            }
            String rawHexString = Integer.toHexString(byteValue.intValue());
            String fixedHexString = fixHexStringLength(rawHexString);
            String hexText = fixedHexString;
            if (0 == i % 4) {
                hexText = " " + hexText;
            }
            if (0 == i % 16) {
                hexText = "\n" + Long.toHexString(imagePointer.getAddress()) + ":" + hexText;
                asciiChars = "  |";
                ebcdicChars = " |";
            }
            stringBuffer.append(hexText);
            asciiChars += Utils.byteToAscii.substring(asciiIndex, asciiIndex + 1);
            if (15 == i % 16 && i != 0) {
                asciiChars += "|";
                stringBuffer.append(asciiChars);
            }
            if (is_zOSdump) {
                // for zOS dumps, output additional EBCDIC interpretation of the memory byes
                ebcdicChars += Utils.byteToEbcdic.substring(asciiIndex, asciiIndex + 1);
                if (15 == i % 16 && i != 0) {
                    ebcdicChars += "|";
                    stringBuffer.append(ebcdicChars);
                }
            }
        } catch (MemoryAccessException e) {
            out.println("Address not in memory - 0x" + Long.toHexString(imagePointer.getAddress()));
            return;
        } catch (CorruptDataException e) {
            out.println("Dump data is corrupted");
            return;
        }
    }
    long undisplayedBytes = 16 - i % 16;
    if (16 != undisplayedBytes) {
        stringBuffer.append(padSpace(undisplayedBytes, asciiChars));
        if (is_zOSdump) {
            // Add padding and output the remaining EBCDIC characters
            for (int j = 0; j < undisplayedBytes; j++) {
                ebcdicChars = " " + ebcdicChars;
            }
            stringBuffer.append(" " + ebcdicChars);
        }
    }
    stringBuffer.append("\n");
    out.println(new String(stringBuffer));
    /*properties.put(Utils.CURRENT_MEM_ADDRESS, 
				Long.toHexString(addressInDecimal+numBytesToPrint));*/
    ctx.getProperties().put(Utils.CURRENT_MEM_ADDRESS, new Long(addressInDecimal));
    ctx.getProperties().put(Utils.CURRENT_NUM_BYTES_TO_PRINT, new Integer(numBytesToPrint));
}

Example 49 with CorruptDataException

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

the class NodeList method toString.

// Print this list of monitor nodes (ie the owning threads and there object addresses)
public String toString() {
    String retval = "";
    MonitorNode currNode = tail;
    MonitorNode lastNode = null;
    boolean firstTime = true;
    boolean done = false;
    do {
        String name = "";
        String objAddr = "";
        JavaObject object = null;
        JavaThread owner = null;
        try {
            owner = currNode.getOwner();
            name = owner.getName();
            ImageThread nativeThread = owner.getImageThread();
            if (nativeThread != null) {
                name = name + " id: " + nativeThread.getID();
            }
        } catch (CorruptDataException e) {
            name = Exceptions.getCorruptDataExceptionString();
        } catch (DataUnavailable e) {
            name = Exceptions.getDataUnavailableString();
        } catch (MemoryAccessException e) {
            name = Exceptions.getMemoryAccessExceptionString();
        }
        object = currNode.getObject();
        if (null == object) {
            objAddr = " at : " + Utils.toHex(currNode.getMonitorAddress());
        } else {
            objAddr = " object : " + Utils.toHex(object.getID().getAddress());
        }
        String lockName = currNode.getType();
        retval += "thread: " + name + " (owns " + lockName + objAddr + ") waiting for =>\n\t  ";
        lastNode = currNode;
        currNode = currNode.waitingOn;
        if (head == lastNode) {
            if (firstTime && head == tail)
                done = false;
            else
                done = true;
        }
        firstTime = false;
    } while (!done);
    // removes the tail of the last entry
    retval = retval.substring(0, retval.length() - 18);
    return retval;
}

Example 50 with CorruptDataException

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

the class WhatisCommand method isStartOfObj.

private boolean isStartOfObj(Iterator objects, long address) {
    String className;
    long corruptObjectCount = 0;
    while (objects.hasNext()) {
        Object obj = objects.next();
        if (obj instanceof CorruptData) {
            corruptObjectCount++;
            continue;
        }
        JavaObject jObject = (JavaObject) obj;
        if (address == jObject.getID().getAddress()) {
            try {
                className = jObject.getJavaClass().getName();
            } catch (CorruptDataException cde) {
                className = "<corrupt class name>";
            }
            out.print("\t\t0x" + Long.toHexString(address) + " is the start of an object of type " + className);
            return true;
        }
    }
    if (corruptObjectCount > 0) {
        out.println("\t\t[skipped " + corruptObjectCount + " corrupt object(s) in heap]");
    }
    return false;
}