Examples with ClassWalker com.ibm.j9ddr.vm29.tools.ddrinteractive.ClassWalker used on opensource projects

Example 1 with ClassWalker

use of com.ibm.j9ddr.vm29.tools.ddrinteractive.ClassWalker in project openj9 by eclipse.

the class LinearDumper method getAllRegions.

/**
 * Returns a tree of regions and slots. Each slot is under a region. The
 * root element is always null.
 * @param classWalker
 *
 * @return J9ClassRegionNode tree of J9ClassRegion
 * @throws CorruptDataException
 */
public J9ClassRegionNode getAllRegions(ClassWalker classWalker) throws CorruptDataException {
    classWalker.allSlotsInObjectDo(this);
    final StructurePointer clazz = classWalker.getClazz();
    /* Add the UTF8 region */
    if (firstJ9_ROM_UTF8 != Long.MAX_VALUE) {
        addSection(clazz, PointerPointer.cast(firstJ9_ROM_UTF8), lastJ9_ROM_UTF8 - firstJ9_ROM_UTF8, "UTF8", true);
    }
    groupSectionByName(clazz, "methodDebugInfo", false);
    groupSectionByName(clazz, "variableInfo", false);
    /*
		 * the offset is a pointer which points at the end of the current
		 * region, in the case of a region which have no real size, it points at
		 * the beginning of the region
		 */
    AbstractPointer offset = PointerPointer.NULL;
    J9ClassRegionNode currentNode = new J9ClassRegionNode(null);
    Stack<J9ClassRegionNode> parentStack = new Stack<J9ClassRegionNode>();
    J9ClassRegion previousRegion = null;
    Collections.sort(classRegions);
    for (J9ClassRegion region : classRegions) {
        if (isSameRegion(previousRegion, region)) {
            previousRegion = region;
            continue;
        }
        previousRegion = region;
        if (SlotType.J9_SECTION_START == region.getType()) {
            if (region.getComputePadding() && offset.notNull() && !offset.eq(region.getSlotPtr())) {
                currentNode.addChild(new J9ClassRegionNode(new J9ClassRegion(offset, SlotType.J9_Padding, "Padding", "", region.getSlotPtr().getAddress() - offset.getAddress(), 0, true)));
            }
            if (region.getComputePadding()) {
                offset = region.getSlotPtr();
            }
            parentStack.push(currentNode);
            J9ClassRegionNode newChild = new J9ClassRegionNode(region);
            currentNode.addChild(newChild);
            currentNode = newChild;
        } else if (SlotType.J9_SECTION_END == region.getType()) {
            if (region.getComputePadding()) {
                long paddingSize = (region.getSlotPtr().getAddress() - offset.getAddress());
                if (paddingSize != 0) {
                    currentNode.addChild(new J9ClassRegionNode(new J9ClassRegion(offset, SlotType.J9_Padding, "Padding", "", paddingSize, 0, true)));
                }
                offset = region.getSlotPtr();
            }
            currentNode = parentStack.pop();
        } else {
            boolean computePadding = false;
            if (currentNode.getNodeValue() != null) {
                computePadding = currentNode.getNodeValue().getComputePadding();
            }
            if (computePadding && offset.notNull() && !offset.eq(region.getSlotPtr())) {
                currentNode.addChild(new J9ClassRegionNode(new J9ClassRegion(offset, SlotType.J9_Padding, "Padding", "", region.getSlotPtr().getAddress() - offset.getAddress(), 0, true)));
            }
            if (computePadding) {
                offset = region.getSlotPtr().addOffset(region.length);
            }
            currentNode.addChild(new J9ClassRegionNode(region));
        }
    }
    // Padding after the class and inside the romSize.
    if (clazz instanceof J9ROMClassPointer) {
        long size = J9ROMClassPointer.cast(clazz).romSize().longValue();
        long paddingSize = (clazz.longValue() + size) - offset.longValue();
        if (paddingSize != 0) {
            currentNode.addChild(new J9ClassRegionNode(new J9ClassRegion(offset, SlotType.J9_Padding, "Padding", "", paddingSize, 0, true)));
            // The class padding might be inserted out of order
            Collections.sort(currentNode.getChildren());
        }
    }
    return currentNode;
}

Example 2 with ClassWalker

use of com.ibm.j9ddr.vm29.tools.ddrinteractive.ClassWalker in project openj9 by eclipse.

the class DumpAllRamClassLinearCommand method run.

public void run(String command, String[] args, Context context, PrintStream out) throws DDRInteractiveCommandException {
    long nestingThreashold;
    if (args.length > 1) {
        throw new DDRInteractiveCommandException("This debug extension accepts none or one argument!");
    } else if (args.length == 1) {
        nestingThreashold = Long.valueOf(args[0]);
    } else {
        nestingThreashold = 1;
    }
    try {
        J9JavaVMPointer vm = J9RASHelper.getVM(DataType.getJ9RASPointer());
        if (null != vm) {
            out.println();
            out.println("!j9javavm " + vm.getHexAddress());
        } else {
            throw new DDRInteractiveCommandException("Unable to find the VM in core dump!");
        }
        out.println();
        ClassSegmentIterator classSegmentIterator = new ClassSegmentIterator(vm.classMemorySegments());
        while (classSegmentIterator.hasNext()) {
            J9ClassPointer classPointer = (J9ClassPointer) classSegmentIterator.next();
            out.println("!dumpramclasslinear " + classPointer.getHexAddress());
            // RAM Class 'org/apache/tomcat/util/buf/MessageBytes' at 0x0DCF9008:
            out.println(String.format("RAM Class '%s' at %s", J9ClassHelper.getJavaName(classPointer), classPointer.getHexAddress()));
            out.println();
            ClassWalker classWalker = new RamClassWalker(classPointer, context);
            new LinearDumper().gatherLayoutInfo(out, classWalker, nestingThreashold);
            out.println();
        }
    } catch (CorruptDataException e1) {
        // TODO Auto-generated catch block
        e1.printStackTrace();
    }
}

Example 3 with ClassWalker

use of com.ibm.j9ddr.vm29.tools.ddrinteractive.ClassWalker in project openj9 by eclipse.

the class DumpRomClassLinearCommand method run.

public void run(String command, String[] args, Context context, PrintStream out) throws DDRInteractiveCommandException {
    if (args.length == 0)
        throw new DDRInteractiveCommandException("This debug extension needs an address argument !dumpromclasslinear <addr>[,n]");
    String[] arguments = args[0].split(",");
    long addr = Long.decode(arguments[0]);
    long nestingThreshold;
    if (arguments.length > 1) {
        nestingThreshold = Long.decode(arguments[1]);
    } else {
        nestingThreshold = 1;
    }
    J9ROMClassPointer clazz = J9ROMClassPointer.cast(addr);
    try {
        // ROM Class 'org/apache/tomcat/util/buf/MessageBytes' at 0x0DCF9008:
        out.println(String.format("ROM Class '%s' at %s", J9UTF8Helper.stringValue(clazz.className()), clazz.getHexAddress()));
        ClassWalker classWalker = new RomClassWalker(clazz, context);
        new LinearDumper().gatherLayoutInfo(out, classWalker, nestingThreshold);
    } catch (CorruptDataException e) {
        throw new DDRInteractiveCommandException(e);
    }
}

Example 4 with ClassWalker

use of com.ibm.j9ddr.vm29.tools.ddrinteractive.ClassWalker in project openj9 by eclipse.

the class DumpAllRomClassLinearCommand method run.

public void run(String command, String[] args, Context context, PrintStream out) throws DDRInteractiveCommandException {
    long nestingThreashold;
    if (args.length > 1) {
        throw new DDRInteractiveCommandException("This debug extension accepts none or one argument!");
    } else if (args.length == 1) {
        nestingThreashold = Long.valueOf(args[0]);
    } else {
        nestingThreashold = 1;
    }
    try {
        J9JavaVMPointer vm = J9RASHelper.getVM(DataType.getJ9RASPointer());
        if (null != vm) {
            out.println();
            out.println("!j9javavm " + vm.getHexAddress());
        } else {
            throw new DDRInteractiveCommandException("Unable to find the VM in core dump!");
        }
        out.println();
        ROMClassesIterator iterator = new ROMClassesIterator(out, vm.classMemorySegments());
        while (iterator.hasNext()) {
            J9ROMClassPointer classPointer = iterator.next();
            out.println("!dumpromclasslinear " + classPointer.getHexAddress());
            // ROM Class 'org/apache/tomcat/util/buf/MessageBytes' at 0x0DCF9008:
            out.println(String.format("ROM Class '%s' at %s", J9UTF8Helper.stringValue(classPointer.className()), classPointer.getHexAddress()));
            out.println();
            ClassWalker classWalker = new RomClassWalker(classPointer, context);
            new LinearDumper().gatherLayoutInfo(out, classWalker, nestingThreashold);
            out.println();
        }
    } catch (CorruptDataException e1) {
        // TODO Auto-generated catch block
        e1.printStackTrace();
    }
}

Example 5 with ClassWalker

use of com.ibm.j9ddr.vm29.tools.ddrinteractive.ClassWalker in project openj9 by eclipse.

the class RomClassSummaryCommand method run.

public void run(String command, String[] args, Context context, PrintStream out) throws DDRInteractiveCommandException {
    try {
        boolean requiredLocal = false;
        boolean requiredShared = false;
        boolean required16bitnas = false;
        J9SharedClassConfigPointer sc = J9SharedClassConfigPointer.NULL;
        J9JavaVMPointer vm = J9RASHelper.getVM(DataType.getJ9RASPointer());
        long startAddress = 0, endAddress = 0;
        if ((args != null) && (args.length >= 1)) {
            if (args[0].equals("shared")) {
                requiredShared = true;
            } else if (args[0].equals("local")) {
                requiredLocal = true;
            } else if (args[0].equals("16bitnas")) {
                required16bitnas = true;
            } else {
                out.println("USAGE: !romclasssummary [local|shared] [16bitnas]");
                return;
            }
            if ((args.length >= 2) && (args[1].equals("16bitnas"))) {
                required16bitnas = true;
            }
            if (requiredShared || requiredLocal) {
                sc = vm.sharedClassConfig();
                if (requiredShared && sc.isNull()) {
                    out.println("The request for '" + args[0] + " classes' failed, because " + "shared classes were not enabled on that dump file.");
                    return;
                }
                if (sc.notNull()) {
                    startAddress = UDATA.cast(sc.cacheDescriptorList().romclassStartAddress()).longValue();
                    J9SharedCacheHeaderPointer header = sc.cacheDescriptorList().cacheStartAddress();
                    endAddress = UDATA.cast(header).add(header.segmentSRP()).longValue();
                }
            }
        }
        ClassSummaryHelper classSummaryHelper = new ClassSummaryHelper(preferredOrder);
        Statistics statistics = new Statistics();
        ROMClassesIterator classSegmentIterator = new ROMClassesIterator(out, vm.classMemorySegments());
        while (classSegmentIterator.hasNext()) {
            J9ROMClassPointer classPointer = (J9ROMClassPointer) classSegmentIterator.next();
            if (requiredShared || requiredLocal) {
                boolean isShared;
                if (sc.notNull()) {
                    long classAddress = classPointer.getAddress();
                    isShared = classAddress >= startAddress && classAddress < endAddress;
                } else {
                    isShared = false;
                }
                if (requiredShared && !isShared)
                    continue;
                if (requiredLocal && isShared)
                    continue;
            }
            ClassWalker classWalker = new RomClassWalker(classPointer, context);
            LinearDumper linearDumper = new LinearDumper();
            J9ClassRegionNode allRegionsNode = linearDumper.getAllRegions(classWalker);
            classSummaryHelper.addRegionsForClass(allRegionsNode);
            if (required16bitnas) {
                statistics.add(allRegionsNode);
            }
        }
        classSummaryHelper.printStatistics(out);
        if (statistics.nameAndSignatureSRP16bitSize != -1) {
            out.println();
            out.println("<Total 16bit nameAndSignatureSRPs Size>");
            out.println(statistics.nameAndSignatureSRP16bitSize);
        }
        if (statistics.nameAndSignatureSRPCount != -1 && statistics.cpFieldNASCount != -1) {
            out.println();
            out.println("<Shared nameAndSignatureSRPs>");
            // nameAndSignatureSRPCount is divided by 2, because there is a name and a signature per NAS field
            out.println(statistics.cpFieldNASCount - statistics.nameAndSignatureSRPCount / 2);
        }
    } catch (CorruptDataException e) {
        throw new DDRInteractiveCommandException(e);
    }
}