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

Example 16 with ImagePointer

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

the class JavaThread method addNewStackFrame.

public JavaStackFrame addNewStackFrame(long arguments, long method, long pc, int lineNumber) {
    JavaStackFrame frame = null;
    JavaMethod javaMethod = _javaVM.methodForID(method);
    ImagePointer frameAddr = _javaVM.pointerInAddressSpace(arguments);
    ImagePointer programCounter = _javaVM.pointerInAddressSpace(pc);
    if (javaMethod == null) {
        ImagePointer meth = _javaVM.pointerInAddressSpace(method);
        frame = new JavaStackFrame(_javaVM, frameAddr, meth, programCounter, lineNumber);
    } else {
        frame = new JavaStackFrame(_javaVM, frameAddr, javaMethod, programCounter, lineNumber);
    }
    addFrame(frame);
    return frame;
}

Example 17 with ImagePointer

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

the class JCJavaMonitor method getThreads.

/**
 * @param threadIDs
 */
private Iterator getThreads(Vector threadIDs) {
    Vector threads = new Vector();
    Iterator it = threadIDs.iterator();
    while (it.hasNext()) {
        ImagePointer pointer = (ImagePointer) it.next();
        JCJavaThread waitingThread = fRuntime.findJavaThread(pointer.getAddress());
        if (waitingThread != null) {
            threads.add(waitingThread);
        } else {
            threads.add(new JCCorruptData("Unknown thread", pointer));
        }
    }
    return threads.iterator();
}

Example 18 with ImagePointer

use of com.ibm.dtfj.image.ImagePointer 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 19 with ImagePointer

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

the class JavaObject method getJavaClass.

/* (non-Javadoc)
	 * @see com.ibm.dtfj.java.JavaObject#getJavaClass()
	 */
public JavaClass getJavaClass() throws CorruptDataException {
    if (0 != _basePointer.getAddress()) {
        ImagePointer classPointer;
        if (_containingHeap == null)
            throw new CorruptDataException(new CorruptData("unable to access class pointer as containing heap is null", _basePointer));
        try {
            classPointer = _containingHeap.readClassPointerRelativeTo(_basePointer);
        } catch (MemoryAccessException e) {
            throw new CorruptDataException(new CorruptData("unable to access class pointer", _basePointer));
        }
        long classID = classPointer.getAddress();
        /* CMVC 167379: Lowest few bits of the class id are used as flags, and should be 
			 * masked with ~(J9_REQUIRED_CLASS_ALIGNMENT - 1) to find real class id. 
			 */
        long classAlignment = _containingHeap.getClassAlignment();
        long alignedClassID = classID;
        if (classAlignment > 0) {
            alignedClassID &= (~(classAlignment - 1L));
        }
        JavaClass ret = _javaVM.getClassForID(alignedClassID);
        if (ret == null) {
            throw new CorruptDataException(new CorruptData("Unknown class ID " + Long.toHexString(alignedClassID) + " for object " + Long.toHexString(_basePointer.getAddress()) + " (read class ID from " + Long.toHexString(classPointer.getAddress()) + ", in memory value was " + Long.toHexString(classID) + ")", _basePointer));
        }
        return ret;
    } else {
        throw new NullPointerException();
    }
}

Example 20 with ImagePointer

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

the class JavaClass method getConstantPoolReferences.

/* (non-Javadoc)
	 * @see com.ibm.dtfj.java.JavaClass#getConstantPoolReferences()
	 */
public Iterator getConstantPoolReferences() {
    // first look up all the class IDs and translate them into classes then add the objects
    Iterator ids = _constantPoolClassRefs.iterator();
    Vector allRefs = new Vector();
    while (ids.hasNext()) {
        long oneID = ((Long) ids.next()).longValue();
        Object toBeAdded = null;
        com.ibm.dtfj.java.JavaClass oneClass = _javaVM.getClassForID(oneID);
        if (oneClass == null) {
            toBeAdded = new CorruptData("Unknown class in constant pool " + oneID, null);
        } else {
            try {
                toBeAdded = oneClass.getObject();
            } catch (CorruptDataException e) {
                toBeAdded = e.getCorruptData();
            } catch (Exception e) {
                toBeAdded = new CorruptData(e.getMessage());
            }
        }
        allRefs.add(toBeAdded);
    }
    // Loop through the list of constant pool objects, instantiating them and adding them to the list
    for (int i = 0; i < _constantPoolObjects.size(); i++) {
        try {
            long objectId = ((Long) (_constantPoolObjects.get(i))).longValue();
            if (objectId != 0) {
                ImagePointer pointer = _javaVM.pointerInAddressSpace(objectId);
                try {
                    JavaObject instance = _javaVM.getObjectAtAddress(pointer);
                    allRefs.add(instance);
                } catch (IllegalArgumentException e) {
                    // getObjectAtAddress may throw an IllegalArgumentException if the address is not aligned
                    allRefs.add(new CorruptData(e.getMessage(), pointer));
                }
            }
        } catch (CorruptDataException e) {
            allRefs.add(e.getCorruptData());
        }
    }
    return allRefs.iterator();
}