Examples with CorruptDataException com.ibm.j9ddr.CorruptDataException used on opensource projects

Example 41 with CorruptDataException

use of com.ibm.j9ddr.CorruptDataException in project openj9 by eclipse.

the class J9JavaVMHelper method getSystemProperties.

public static Properties getSystemProperties(J9JavaVMPointer vm) throws CorruptDataException {
    Properties result = new Properties();
    Pool<J9VMSystemPropertyPointer> sysprops = Pool.fromJ9Pool(vm.systemProperties(), J9VMSystemPropertyPointer.class);
    Iterator<J9VMSystemPropertyPointer> syspropsIterator = sysprops.iterator();
    int count = 0;
    while (syspropsIterator.hasNext()) {
        J9VMSystemPropertyPointer prop = syspropsIterator.next();
        // Iterator may return null if corrupt data was found.
        if (prop != null) {
            String name = null;
            try {
                name = prop.name().getCStringAtOffset(0);
            } catch (CorruptDataException e) {
                name = "Corrupt System Property[" + count + "]";
            }
            String value = null;
            try {
                value = prop.value().getCStringAtOffset(0);
            } catch (CorruptDataException e) {
                value = "Corrupt Value";
            }
            result.setProperty(name, value);
        }
        count++;
    }
    return result;
}

Example 42 with CorruptDataException

use of com.ibm.j9ddr.CorruptDataException in project openj9 by eclipse.

the class J9MemTagHelper method j9mem_check_tags.

/**
 * Performs validation checks on the memory block starting at memoryPointer.
 *
 * The memory passed in could fall into one of three categories:
 * 1) It could be a valid J9MemTag region with valid headers and footers
 * 2) It could be not be a J9MemTag region
 * 3) It could be a J9MemTag region with some corruption in either the header, footer or padding
 *
 * @param[in] portLibrary The port library
 * @param[in] memoryPointer address returned by @ref j9mem_allocate_memory()
 *
 * @throws CorruptDataException if the tags are corrupted, or the memory is inaccessible. (Option 3)
 * @return J9PORT_MEMTAG_NOT_A_TAG if memoryPointer address is not a tag
 * 		   J9PORT_MEMTAG_HEADER_TAG_CORRUPTED if memoryPointer address is valid tag region but header tag is corrupted.
 * 		   J9PORT_MEMTAG_FOOTER_TAG_CORRUPTED if memoryPointer address is valid tag region but footer tag is corrupted.
 * 		   J9PORT_MEMTAG_FOOTER_PADDING_CORRUPTED if memoryPointer address is valid tag region but footer padding is corrupted.
 * 		   J9PORT_MEMTAG_VALID_TAG if memoryPointer address is valid tag and header/footer are not corrupted.
 * @note memoryPointer may not be NULL.
 */
public static IDATA j9mem_check_tags(VoidPointer memoryPointer, long headerEyecatcher, long footerEyecatcher) throws J9MemTagCheckError {
    J9MemTagPointer headerTagAddress, footerTagAddress = J9MemTagPointer.NULL;
    headerTagAddress = j9mem_get_header_tag(memoryPointer);
    try {
        footerTagAddress = j9mem_get_footer_tag(headerTagAddress);
        checkTagSumCheck(headerTagAddress, headerEyecatcher);
    } catch (J9MemTagCheckError e) {
        /* Corruption here either means the header tag is mangled, or the header eyecatcher isn't actually the start of a 
			 * J9MemTag block.
			 * 
			 * If we can find a valid footerTag, then we'll believe this is a mangled header.
			 */
        try {
            if (checkEyecatcher(footerTagAddress, footerEyecatcher)) {
                /* Footer eyecatcher is valid - header tag is corrupt */
                throw e;
            } else {
                /* Footer eyecatcher is invalid - this isn't a memory tag */
                return J9PORT_MEMTAG_NOT_A_TAG;
            }
        } catch (CorruptDataException e1) {
            /* Can't read the footer tag - assume memoryPointer isn't a tag */
            return J9PORT_MEMTAG_NOT_A_TAG;
        }
    } catch (CorruptDataException e) {
        /* CorruptDataException here will mean MemoryFault. Which means we can't read the 
			 * entire header tag - so we assume this isn't a valid J9MemTag
			 */
        return J9PORT_MEMTAG_NOT_A_TAG;
    }
    try {
        checkTagSumCheck(footerTagAddress, footerEyecatcher);
    } catch (J9MemTagCheckError e) {
        if (headerEyecatcher == J9MEMTAG_EYECATCHER_FREED_HEADER && footerEyecatcher == J9MEMTAG_EYECATCHER_FREED_FOOTER) {
            /* When dealing with already freed memory, it is reasonable to accept
				 * a block that is missing the footer instead of throwing an exception.
				 */
            return J9PORT_MEMTAG_FOOTER_TAG_CORRUPTED;
        } else {
            throw e;
        }
    } catch (CorruptDataException e) {
        /* If we got here, the header was valid. A memory fault here suggests
			 * we're missing the storage for the footer - which is corruption
			 */
        throw new J9MemTagCheckError(headerTagAddress, e);
    }
    try {
        checkPadding(headerTagAddress);
    } catch (J9MemTagCheckError e) {
        if (headerEyecatcher == J9MEMTAG_EYECATCHER_FREED_HEADER && footerEyecatcher == J9MEMTAG_EYECATCHER_FREED_FOOTER) {
            /* When dealing with already freed memory, it is reasonable to accept
				 * a block that is missing the footer instead of throwing an exception.
				 */
            return J9PORT_MEMTAG_FOOTER_PADDING_CORRUPTED;
        } else {
            throw e;
        }
    } catch (CorruptDataException e) {
        /* If we got here, the header was valid. A memory fault here suggests
			 * we're missing the storage for the padding - which is corruption
			 */
        throw new J9MemTagCheckError(headerTagAddress, e);
    }
    return J9PORT_MEMTAG_VALID_TAG;
}

Example 43 with CorruptDataException

use of com.ibm.j9ddr.CorruptDataException in project openj9 by eclipse.

the class FindVMTask method run.

/* (non-Javadoc)
	 * @see com.ibm.j9ddr.IBootstrapRunnable#run(com.ibm.j9ddr.IVMData, java.lang.Object[])
	 */
public void run(IVMData vmData, Object[] userData) {
    long[] passBackArray = (long[]) userData[0];
    String vmAddressString = System.getProperty(J9VM_ADDRESS_PROPERTY);
    if (vmAddressString != null) {
        long address = 0;
        try {
            if (vmAddressString.startsWith("0x")) {
                address = Long.parseLong(vmAddressString.substring(2), 16);
            } else {
                address = Long.parseLong(vmAddressString);
            }
        } catch (NumberFormatException nfe) {
            logger.warning("System property " + J9VM_ADDRESS_PROPERTY + " does not contain a valid pointer address, found: " + vmAddressString);
            throw nfe;
        }
        logger.warning("FindVMTask forcing J9JavaVMPointer to address from system property " + J9VM_ADDRESS_PROPERTY + " : " + vmAddressString);
        // Override the cached version from J9RASHelper as well.
        J9JavaVMPointer vm = J9JavaVMPointer.cast(address);
        J9RASHelper.setCachedVM(vm);
        passBackArray[0] = vm.getAddress();
    } else {
        try {
            passBackArray[0] = DataType.getJ9RASPointer().vm().longValue();
        } catch (CorruptDataException e) {
            throw new RuntimeException(e);
        }
    }
    logger.fine("FindVMTask passing back J9JavaVMPointer: 0x" + Long.toHexString(passBackArray[0]));
}

Example 44 with CorruptDataException

use of com.ibm.j9ddr.CorruptDataException in project openj9 by eclipse.

the class ThreadsCommand method debugEventData.

private void debugEventData(PrintStream out) throws DDRInteractiveCommandException {
    try {
        J9JavaVMPointer vm = J9RASHelper.getVM(DataType.getJ9RASPointer());
        J9VMThreadPointer mainThread = vm.mainThread();
        if (mainThread.notNull()) {
            J9VMThreadPointer threadCursor = vm.mainThread();
            do {
                // 
                out.append(String.format("    !j9vmthread 0x%s %s %s %s %s %s %s %s %s", Long.toHexString(threadCursor.getAddress()), Long.toHexString(threadCursor.debugEventData1().longValue()), Long.toHexString(threadCursor.debugEventData2().longValue()), Long.toHexString(threadCursor.debugEventData3().longValue()), Long.toHexString(threadCursor.debugEventData4().longValue()), Long.toHexString(threadCursor.debugEventData5().longValue()), Long.toHexString(threadCursor.debugEventData6().longValue()), Long.toHexString(threadCursor.debugEventData7().longValue()), Long.toHexString(threadCursor.debugEventData8().longValue())));
                out.append(nl);
                threadCursor = threadCursor.linkNext();
            } while (!threadCursor.eq(mainThread));
        }
    } catch (CorruptDataException e) {
        throw new DDRInteractiveCommandException(e);
    }
}

Example 45 with CorruptDataException

use of com.ibm.j9ddr.CorruptDataException in project openj9 by eclipse.

the class LinearDumper method addSlot.

public void addSlot(StructurePointer clazz, SlotType type, AbstractPointer slotPtr, String slotName, String additionalInfo) throws CorruptDataException {
    try {
        J9ROMNameAndSignaturePointer nas;
        long offset;
        /* The slots of the type J9_ROM_UTF8 are changed to have 2 slots:
			 * -J9_SRP_TO_STRING
			 * -J9_ROM_UTF8
			 * This is done because we want to print the SRP field and also print
			 * the UTF8 it is pointing to */
        switch(type) {
            case J9_ROM_UTF8:
                offset = slotPtr.getAddress() - clazz.getAddress();
                classRegions.add(new J9ClassRegion(slotPtr, SlotType.J9_SRP_TO_STRING, slotName, additionalInfo, type.getSize(), offset, true));
                VoidPointer srp = SelfRelativePointer.cast(slotPtr).get();
                addUTF8Region(clazz, slotName, additionalInfo, srp);
                break;
            case J9_UTF8:
                addUTF8Region(clazz, slotName, additionalInfo, slotPtr);
                break;
            /* The fields of the type J9_SRPNAS or J9_SRP are changed to have 2 J9_ROM_UTF8
				 * fields for their name and signature separated. */
            case J9_SRPNAS:
                nas = J9ROMNameAndSignaturePointer.cast(SelfRelativePointer.cast(slotPtr).get());
                if (nas.notNull()) {
                    addSlot(clazz, SlotType.J9_ROM_UTF8, nas.nameEA(), "name");
                    addSlot(clazz, SlotType.J9_ROM_UTF8, nas.signatureEA(), "signature");
                }
                /* Since it is a SRP to a NAS, also print the SRP field. */
                addSlot(clazz, SlotType.J9_SRP, slotPtr, "cpFieldNAS");
                break;
            case J9_NAS:
                nas = J9ROMNameAndSignaturePointer.cast(slotPtr);
                addSlot(clazz, SlotType.J9_ROM_UTF8, nas.nameEA(), "name");
                addSlot(clazz, SlotType.J9_ROM_UTF8, nas.signatureEA(), "signature");
                break;
            case J9_IntermediateClassData:
                offset = slotPtr.getAddress() - clazz.getAddress();
                classRegions.add(new J9ClassRegion(slotPtr, type, slotName, additionalInfo, ((J9ROMClassPointer) clazz).intermediateClassDataLength().longValue(), offset, true));
                break;
            default:
                offset = slotPtr.getAddress() - clazz.getAddress();
                classRegions.add(new J9ClassRegion(slotPtr, type, slotName, additionalInfo, type.getSize(), offset, true));
                break;
        }
    } catch (Exception e) {
    }
}