private static long headerSize(BasicType type) {
if (Universe.elementTypeShouldBeAligned(type)) {
return alignObjectSize(headerSizeInBytes()) / VM.getVM().getHeapWordSize();
} else {
return headerSizeInBytes() / VM.getVM().getHeapWordSize();
}
}
private long lengthOffsetInBytes() {
if (lengthOffsetInBytes != 0) {
return lengthOffsetInBytes;
}
if (VM.getVM().isCompressedOopsEnabled()) {
lengthOffsetInBytes = typeSize - VM.getVM().getIntSize();
} else {
lengthOffsetInBytes = typeSize;
}
return lengthOffsetInBytes;
}
private static long headerSizeInBytes() {
if (headerSize != 0) {
return headerSize;
}
if (VM.getVM().isCompressedOopsEnabled()) {
headerSize = typeSize;
} else {
headerSize =
VM.getVM().alignUp(typeSize + VM.getVM().getIntSize(), VM.getVM().getHeapWordSize());
}
return headerSize;
}
/** Only returns addresses of valid OopHandles */
private Address getOopHandleAddress(int x) {
if (Assert.ASSERTS_ENABLED) {
Assert.that(x < top(), "out of bounds");
}
Address oopAddr = addr.addOffsetTo(handlesField.getOffset() + x * VM.getVM().getOopSize());
OopHandle handle = oopAddr.getOopHandleAt(0);
if (VM.getVM().getUniverse().isInReserved(handle)
&& !VM.getVM().getJNIHandles().isDeletedHandle(handle)) {
/* the oop handle is valid only if it is not freed (i.e. reserved in heap) and is not a deleted oop */
return oopAddr;
} else {
return null;
}
}
// "size helper" == instance size in words
public long getSizeHelper() {
int lh = getLayoutHelper();
if (Assert.ASSERTS_ENABLED) {
Assert.that(lh > 0, "layout helper initialized for instance class");
}
return lh / VM.getVM().getAddressSize();
}
public int getFieldOrMethodAt(int which) {
if (DEBUG) {
System.err.print("ConstantPool.getFieldOrMethodAt(" + which + "): new index = ");
}
int i = -1;
ConstantPoolCache cache = getCache();
if (cache == null) {
i = which;
} else {
// change byte-ordering and go via cache
i =
cache
.getEntryAt(0xFFFF & VM.getVM().getBytes().swapShort((short) which))
.getConstantPoolIndex();
}
if (Assert.ASSERTS_ENABLED) {
Assert.that(getTagAt(i).isFieldOrMethod(), "Corrupted constant pool");
}
if (DEBUG) {
System.err.println(i);
}
int res = getIntAt(i);
if (DEBUG) {
System.err.println("ConstantPool.getFieldOrMethodAt(" + i + "): result = " + res);
}
return res;
}
private static void initialize(TypeDataBase db) {
if (Assert.ASSERTS_ENABLED) {
Assert.that(!VM.getVM().isCore(), "Debug info not used in core build");
}
OFFSET_MASK = db.lookupIntConstant("Location::OFFSET_MASK").intValue();
OFFSET_SHIFT = db.lookupIntConstant("Location::OFFSET_SHIFT").intValue();
TYPE_MASK = db.lookupIntConstant("Location::TYPE_MASK").intValue();
TYPE_SHIFT = db.lookupIntConstant("Location::TYPE_SHIFT").intValue();
WHERE_MASK = db.lookupIntConstant("Location::WHERE_MASK").intValue();
WHERE_SHIFT = db.lookupIntConstant("Location::WHERE_SHIFT").intValue();
// Location::Type constants
TYPE_NORMAL = db.lookupIntConstant("Location::normal").intValue();
TYPE_OOP = db.lookupIntConstant("Location::oop").intValue();
TYPE_NARROWOOP = db.lookupIntConstant("Location::narrowoop").intValue();
TYPE_INT_IN_LONG = db.lookupIntConstant("Location::int_in_long").intValue();
TYPE_LNG = db.lookupIntConstant("Location::lng").intValue();
TYPE_FLOAT_IN_DBL = db.lookupIntConstant("Location::float_in_dbl").intValue();
TYPE_DBL = db.lookupIntConstant("Location::dbl").intValue();
TYPE_ADDR = db.lookupIntConstant("Location::addr").intValue();
TYPE_INVALID = db.lookupIntConstant("Location::invalid").intValue();
// Location::Where constants
WHERE_ON_STACK = db.lookupIntConstant("Location::on_stack").intValue();
WHERE_IN_REGISTER = db.lookupIntConstant("Location::in_register").intValue();
}
private static void initialize(TypeDataBase db) {
if (VM.getVM().isServerCompiler()) {
Type type = db.lookupType("Matcher");
Field f = type.getField("_regEncode");
matcherRegEncodeAddr = f.getStaticFieldAddress();
}
}
public long getLongAt(long index) {
int oneHalf = getHandle().getJIntAt(indexOffset(index + 1));
int otherHalf = getHandle().getJIntAt(indexOffset(index));
// buildLongFromIntsPD accepts higher address value, lower address value
// in that order.
return VM.getVM().buildLongFromIntsPD(oneHalf, otherHalf);
}
private long getElementSize() {
if (elementSize != 0) {
return elementSize;
} else {
elementSize = VM.getVM().getOopSize();
}
return elementSize;
}
static {
VM.registerVMInitializedObserver(
new Observer() {
public void update(Observable o, Object data) {
initialize(VM.getVM().getTypeDataBase());
}
});
}
/** Convenience routine taking Strings; lookup is done in SymbolTable. */
public Method findMethod(String name, String sig) {
SymbolTable syms = VM.getVM().getSymbolTable();
Symbol nameSym = syms.probe(name);
Symbol sigSym = syms.probe(sig);
if (nameSym == null || sigSym == null) {
return null;
}
return findMethod(nameSym, sigSym);
}
private static void initialize(TypeDataBase db) {
Type type = db.lookupType("oopDesc");
if (VM.getVM().isCompressedOopsEnabled()) {
klassField = type.getNarrowOopField("_metadata._compressed_klass");
} else {
klassField = type.getOopField("_metadata._klass");
}
}
public ThreadProxy getThreadProxy(Address addr) {
// Addr is the address of the JavaThread.
// Fetch the OSThread (for now and for simplicity, not making a
// separate "OSThread" class in this package)
Address osThreadAddr = osThreadField.getValue(addr);
// Get the address of the _thread_id from the OSThread
Address threadIdAddr = osThreadAddr.addOffsetTo(osThreadThreadIDField.getOffset());
JVMDebugger debugger = VM.getVM().getDebugger();
return debugger.getThreadForIdentifierAddress(threadIdAddr);
}
public static boolean oopLooksValid(OopHandle oop) {
if (oop == null) {
return false;
}
if (!VM.getVM().getUniverse().isIn(oop)) {
return false;
}
try {
for (int i = 0; i < 4; ++i) {
OopHandle next = klassField.getValue(oop);
if (next == null) {
return false;
}
if (next.equals(oop)) {
return true;
}
oop = next;
}
return false;
} catch (AddressException e) {
return false;
}
}
// Creates new field from index in fields TypeArray
private Field newField(int index) {
TypeArray fields = getFields();
short signatureIndex = fields.getShortAt(index + SIGNATURE_INDEX_OFFSET);
FieldType type = new FieldType((Symbol) getConstants().getObjAt(signatureIndex));
if (type.isOop()) {
if (VM.getVM().isCompressedOopsEnabled()) {
return new NarrowOopField(this, index);
} else {
return new OopField(this, index);
}
}
if (type.isByte()) {
return new ByteField(this, index);
}
if (type.isChar()) {
return new CharField(this, index);
}
if (type.isDouble()) {
return new DoubleField(this, index);
}
if (type.isFloat()) {
return new FloatField(this, index);
}
if (type.isInt()) {
return new IntField(this, index);
}
if (type.isLong()) {
return new LongField(this, index);
}
if (type.isShort()) {
return new ShortField(this, index);
}
if (type.isBoolean()) {
return new BooleanField(this, index);
}
throw new RuntimeException("Illegal field type at index " + index);
}
private static synchronized void initialize(TypeDataBase db) throws WrongTypeException {
Type type = db.lookupType("methodOopDesc");
constMethod = new OopField(type.getOopField("_constMethod"), 0);
constants = new OopField(type.getOopField("_constants"), 0);
methodSize = new CIntField(type.getCIntegerField("_method_size"), 0);
maxStack = new CIntField(type.getCIntegerField("_max_stack"), 0);
maxLocals = new CIntField(type.getCIntegerField("_max_locals"), 0);
sizeOfParameters = new CIntField(type.getCIntegerField("_size_of_parameters"), 0);
accessFlags = new CIntField(type.getCIntegerField("_access_flags"), 0);
code = type.getAddressField("_code");
vtableIndex = new CIntField(type.getCIntegerField("_vtable_index"), 0);
if (!VM.getVM().isCore()) {
invocationCounter = new CIntField(type.getCIntegerField("_invocation_counter"), 0);
}
bytecodeOffset = type.getSize();
/*
interpreterEntry = type.getAddressField("_interpreter_entry");
fromCompiledCodeEntryPoint = type.getAddressField("_from_compiled_code_entry_point");
*/
objectInitializerName = null;
classInitializerName = null;
}
private static Symbol javaLangCloneableName() {
if (javaLangCloneableName == null) {
javaLangCloneableName = VM.getVM().getSymbolTable().probe("java/lang/Cloneable");
}
return javaLangCloneableName;
}
private static Symbol objectInitializerName() {
if (objectInitializerName == null) {
objectInitializerName = VM.getVM().getSymbolTable().probe("<init>");
}
return objectInitializerName;
}
public int getStackOffset() {
if (Assert.ASSERTS_ENABLED) {
Assert.that(getWhere() == Where.ON_STACK, "wrong Where");
}
return getOffset() * (int) VM.getVM().getIntSize();
}
public Klass getJavaSuper() {
SystemDictionary sysDict = VM.getVM().getSystemDictionary();
return sysDict.getObjectKlass();
}
public long getInvocationCounter() {
if (Assert.ASSERTS_ENABLED) {
Assert.that(!VM.getVM().isCore(), "must not be used in core build");
}
return invocationCounter.getValue(this);
}
public static long baseOffsetInBytes(BasicType type) {
return headerSize(type) * VM.getVM().getHeapWordSize();
}
private static synchronized void initialize(TypeDataBase db) {
Type type = db.lookupType("Threads");
threadListField = type.getAddressField("_thread_list");
numOfThreadsField = type.getCIntegerField("_number_of_threads");
// Instantiate appropriate platform-specific JavaThreadFactory
String os = VM.getVM().getOS();
String cpu = VM.getVM().getCPU();
access = null;
// FIXME: find the platform specific PD class by reflection?
if (os.equals("solaris")) {
if (cpu.equals("sparc")) {
access = new SolarisSPARCJavaThreadPDAccess();
} else if (cpu.equals("x86")) {
access = new SolarisX86JavaThreadPDAccess();
} else if (cpu.equals("amd64")) {
access = new SolarisAMD64JavaThreadPDAccess();
}
} else if (os.equals("win32")) {
if (cpu.equals("x86")) {
access = new Win32X86JavaThreadPDAccess();
} else if (cpu.equals("amd64")) {
access = new Win32AMD64JavaThreadPDAccess();
}
} else if (os.equals("linux")) {
if (cpu.equals("x86")) {
access = new LinuxX86JavaThreadPDAccess();
} else if (cpu.equals("amd64")) {
access = new LinuxAMD64JavaThreadPDAccess();
} else if (cpu.equals("sparc")) {
access = new LinuxSPARCJavaThreadPDAccess();
} else if (cpu.equals("ppc64")) {
access = new LinuxPPC64JavaThreadPDAccess();
} else if (cpu.equals("aarch64")) {
access = new LinuxAARCH64JavaThreadPDAccess();
} else {
try {
access =
(JavaThreadPDAccess)
Class.forName(
"sun.jvm.hotspot.runtime.linux_"
+ cpu.toLowerCase()
+ ".Linux"
+ cpu.toUpperCase()
+ "JavaThreadPDAccess")
.newInstance();
} catch (Exception e) {
throw new RuntimeException("OS/CPU combination " + os + "/" + cpu + " not yet supported");
}
}
} else if (os.equals("bsd")) {
if (cpu.equals("x86")) {
access = new BsdX86JavaThreadPDAccess();
} else if (cpu.equals("amd64") || cpu.equals("x86_64")) {
access = new BsdAMD64JavaThreadPDAccess();
}
} else if (os.equals("darwin")) {
if (cpu.equals("amd64") || cpu.equals("x86_64")) {
access = new BsdAMD64JavaThreadPDAccess();
}
}
if (access == null) {
throw new RuntimeException("OS/CPU combination " + os + "/" + cpu + " not yet supported");
}
virtualConstructor = new VirtualConstructor(db);
// Add mappings for all known thread types
virtualConstructor.addMapping("JavaThread", JavaThread.class);
if (!VM.getVM().isCore()) {
virtualConstructor.addMapping("CompilerThread", CompilerThread.class);
virtualConstructor.addMapping("CodeCacheSweeperThread", CodeCacheSweeperThread.class);
}
virtualConstructor.addMapping("JvmtiAgentThread", JvmtiAgentThread.class);
virtualConstructor.addMapping("ServiceThread", ServiceThread.class);
}
// Accessor
public Oop loader() {
return VM.getVM().getObjectHeap().newOop(loaderField.getValue(addr));
}
private static Symbol javaLangObjectName() {
if (javaLangObjectName == null) {
javaLangObjectName = VM.getVM().getSymbolTable().probe("java/lang/Object");
}
return javaLangObjectName;
}
private static Symbol javaIoSerializableName() {
if (javaIoSerializableName == null) {
javaIoSerializableName = VM.getVM().getSymbolTable().probe("java/io/Serializable");
}
return javaIoSerializableName;
}
private static Symbol classInitializerName() {
if (classInitializerName == null) {
classInitializerName = VM.getVM().getSymbolTable().probe("<clinit>");
}
return classInitializerName;
}
public String toString() {
Address handleBase = addr.addOffsetTo(handlesField.getOffset());
Address handleEnd =
addr.addOffsetTo(handlesField.getOffset() + top() * VM.getVM().getOopSize());
return "JNIHandleBlock [" + handleBase + ", " + handleEnd + ")";
}
// Accessors for declared fields
public long getLength() {
boolean isUnsigned = true;
return this.getHandle()
.getCIntegerAt(lengthOffsetInBytes(), VM.getVM().getIntSize(), isUnsigned);
}