private long indexOffset(long index) {
if (Assert.ASSERTS_ENABLED) {
Assert.that(
index > 0 && index < getLength(), "invalid cp index " + index + " " + getLength());
}
return (index * getElementSize()) + headerSize;
}
// secondary entries hold invokedynamic call site bindings
public ConstantPoolCacheEntry getSecondaryEntryAt(int i) {
ConstantPoolCacheEntry e = new ConstantPoolCacheEntry(this, decodeSecondaryIndex(i));
if (Assert.ASSERTS_ENABLED) {
Assert.that(e.isSecondaryEntry(), "must be a secondary entry");
}
return e;
}
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();
}
/**
* Return a List of SA Fields for all the java fields in this class, including all inherited
* fields. This includes hidden fields. Thus the returned list can contain fields with the same
* name. Return an empty list if there are no fields. Only designed for use in a debugging system.
*/
public List getAllFields() {
// Contains a Field for each field in this class, including immediate
// fields and inherited fields.
List allFields = getImmediateFields();
// transitiveInterfaces contains all interfaces implemented
// by this class and its superclass chain with no duplicates.
ObjArray interfaces = getTransitiveInterfaces();
int n = (int) interfaces.getLength();
for (int i = 0; i < n; i++) {
InstanceKlass intf1 = (InstanceKlass) interfaces.getObjAt(i);
if (Assert.ASSERTS_ENABLED) {
Assert.that(intf1.isInterface(), "just checking type");
}
allFields.addAll(intf1.getImmediateFields());
}
// Get all fields in the superclass, recursively. But, don't
// include fields in interfaces implemented by superclasses;
// we already have all those.
if (!isInterface()) {
InstanceKlass supr;
if ((supr = (InstanceKlass) getSuper()) != null) {
allFields.addAll(supr.getImmediateFields());
}
}
return allFields;
}
// "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;
}
public E next() {
if (!hasNext()) {
throw new NoSuchElementException();
}
Neighbor neighbor = list;
list = neighbor.next;
Assert.that(neighbor.level == 0);
return (E) neighbor.child;
}
public int getNameAndTypeAt(int which) {
if (Assert.ASSERTS_ENABLED) {
Assert.that(getTagAt(which).isNameAndType(), "Corrupted constant pool");
}
int i = getIntAt(which);
if (DEBUG) {
System.err.println("ConstantPool.getNameAndTypeAt(" + which + "): result = " + i);
}
return i;
}
public boolean implementsInterface(Klass k) {
if (Assert.ASSERTS_ENABLED) {
Assert.that(k.isInterface(), "should not reach here");
}
ObjArray interfaces = getTransitiveInterfaces();
final int len = (int) interfaces.getLength();
for (int i = 0; i < len; i++) {
if (interfaces.getObjAt(i).equals(k)) return true;
}
return false;
}
public ConstantPoolCacheEntry getMainEntryAt(int i) {
if (isSecondaryIndex(i)) {
// run through an extra level of indirection:
i = getSecondaryEntryAt(i).getMainEntryIndex();
}
ConstantPoolCacheEntry e = new ConstantPoolCacheEntry(this, i);
if (Assert.ASSERTS_ENABLED) {
Assert.that(!e.isSecondaryEntry(), "must not be a secondary entry");
}
return e;
}
/** Find field in direct superinterfaces. */
public Field findInterfaceField(Symbol name, Symbol sig) {
ObjArray interfaces = getLocalInterfaces();
int n = (int) interfaces.getLength();
for (int i = 0; i < n; i++) {
InstanceKlass intf1 = (InstanceKlass) interfaces.getObjAt(i);
if (Assert.ASSERTS_ENABLED) {
Assert.that(intf1.isInterface(), "just checking type");
}
// search for field in current interface
Field f = intf1.findLocalField(name, sig);
if (f != null) {
if (Assert.ASSERTS_ENABLED) {
Assert.that(f.getAccessFlagsObj().isStatic(), "interface field must be static");
}
return f;
}
// search for field in direct superinterfaces
f = intf1.findInterfaceField(name, sig);
if (f != null) return f;
}
// otherwise field lookup fails
return null;
}
/**
* Fetch the original non-breakpoint bytecode at the specified bci. It is required that there is
* currently a bytecode at this bci.
*/
public int getOrigBytecodeAt(int bci) {
BreakpointInfo bp = ((InstanceKlass) getMethodHolder()).getBreakpoints();
for (; bp != null; bp = bp.getNext()) {
if (bp.match(this, bci)) {
return bp.getOrigBytecode();
}
}
System.err.println("Requested bci " + bci);
for (; bp != null; bp = bp.getNext()) {
System.err.println("Breakpoint at bci " + bp.getBCI() + ", bytecode " + bp.getOrigBytecode());
}
Assert.that(false, "Should not reach here");
return -1; // not reached
}
/** 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;
}
}
public Klass arrayKlassImpl(boolean orNull, int n) {
int dimension = (int) getDimension();
if (Assert.ASSERTS_ENABLED) {
Assert.that(dimension <= n, "check order of chain");
}
if (dimension == n) return this;
ObjArrayKlass ak = (ObjArrayKlass) getHigherDimension();
if (ak == null) {
if (orNull) return null;
// FIXME: would need to change in reflective system to actually
// allocate klass
throw new RuntimeException("Can not allocate array klasses in debugging system");
}
if (orNull) {
return ak.arrayKlassOrNull(n);
}
return ak.arrayKlass(n);
}
public int getClassStatus() {
int result = 0;
if (isLinked()) {
result |= JVMDIClassStatus.VERIFIED | JVMDIClassStatus.PREPARED;
}
if (isInitialized()) {
if (Assert.ASSERTS_ENABLED) {
Assert.that(isLinked(), "Class status is not consistent");
}
result |= JVMDIClassStatus.INITIALIZED;
}
if (isInErrorState()) {
result |= JVMDIClassStatus.ERROR;
}
return result;
}
// refer to compute_modifier_flags in VM code.
public long computeModifierFlags() {
long access = getAccessFlags();
// But check if it happens to be member class.
TypeArray innerClassList = getInnerClasses();
int length = (innerClassList == null) ? 0 : (int) innerClassList.getLength();
if (length > 0) {
if (Assert.ASSERTS_ENABLED) {
Assert.that(length % InnerClassAttributeOffset.innerClassNextOffset == 0, "just checking");
}
for (int i = 0; i < length; i += InnerClassAttributeOffset.innerClassNextOffset) {
int ioff =
innerClassList.getShortAt(i + InnerClassAttributeOffset.innerClassInnerClassInfoOffset);
// 'ioff' can be zero.
// refer to JVM spec. section 4.7.5.
if (ioff != 0) {
// only look at classes that are already loaded
// since we are looking for the flags for our self.
Oop classInfo = getConstants().getObjAt(ioff);
Symbol name = null;
if (classInfo instanceof Klass) {
name = ((Klass) classInfo).getName();
} else if (classInfo instanceof Symbol) {
name = (Symbol) classInfo;
} else {
throw new RuntimeException("should not reach here");
}
if (name.equals(getName())) {
// This is really a member class
access =
innerClassList.getShortAt(
i + InnerClassAttributeOffset.innerClassAccessFlagsOffset);
break;
}
}
} // for inner classes
}
// Remember to strip ACC_SUPER bit
return (access & (~JVM_ACC_SUPER)) & JVM_ACC_WRITTEN_FLAGS;
}
public long getInvocationCounter() {
if (Assert.ASSERTS_ENABLED) {
Assert.that(!VM.getVM().isCore(), "must not be used in core build");
}
return invocationCounter.getValue(this);
}
public ConstantPoolCacheEntry getEntryAt(int i) {
if (Assert.ASSERTS_ENABLED) {
Assert.that(0 <= i && i < getLength(), "index out of bounds");
}
return new ConstantPoolCacheEntry(this, i);
}
public int getRegisterNumber() {
if (Assert.ASSERTS_ENABLED) {
Assert.that(getWhere() == Where.IN_REGISTER, "wrong Where");
}
return getOffset();
}
public int getStackOffset() {
if (Assert.ASSERTS_ENABLED) {
Assert.that(getWhere() == Where.ON_STACK, "wrong Where");
}
return getOffset() * (int) VM.getVM().getIntSize();
}
/**
* Creates a ProxyType for a class.
*
* @param klass the class
* @param id the JDWP identifier for the class
* @param ptm the object that created this proxy type and is used to lookup other proxy types
*/
ProxyType(Klass klass, ReferenceTypeID id, ProxyTypeManager ptm) {
this.ptm = ptm;
this.id = id;
Assert.that(klass != null);
this.klass = klass;
}
private boolean isInInnerClasses(Symbol sym, boolean includeLocals) {
TypeArray innerClassList = getInnerClasses();
int length = (innerClassList == null) ? 0 : (int) innerClassList.getLength();
if (length > 0) {
if (Assert.ASSERTS_ENABLED) {
Assert.that(length % InnerClassAttributeOffset.innerClassNextOffset == 0, "just checking");
}
for (int i = 0; i < length; i += InnerClassAttributeOffset.innerClassNextOffset) {
int ioff =
innerClassList.getShortAt(i + InnerClassAttributeOffset.innerClassInnerClassInfoOffset);
// 'ioff' can be zero.
// refer to JVM spec. section 4.7.5.
if (ioff != 0) {
Oop iclassInfo = getConstants().getObjAt(ioff);
Symbol innerName = null;
if (iclassInfo instanceof Klass) {
innerName = ((Klass) iclassInfo).getName();
} else if (iclassInfo instanceof Symbol) {
innerName = (Symbol) iclassInfo;
} else {
throw new RuntimeException("should not reach here");
}
Symbol myname = getName();
int ooff =
innerClassList.getShortAt(
i + InnerClassAttributeOffset.innerClassOuterClassInfoOffset);
// for anonymous classes inner_name_index of InnerClasses
// attribute is zero.
int innerNameIndex =
innerClassList.getShortAt(i + InnerClassAttributeOffset.innerClassInnerNameOffset);
// if this is not a member (anonymous, local etc.), 'ooff' will be zero
// refer to JVM spec. section 4.7.5.
if (ooff == 0) {
if (includeLocals) {
// does it looks like my local class?
if (innerName.equals(sym) && innerName.asString().startsWith(myname.asString())) {
// exclude anonymous classes.
return (innerNameIndex != 0);
}
}
} else {
Oop oclassInfo = getConstants().getObjAt(ooff);
Symbol outerName = null;
if (oclassInfo instanceof Klass) {
outerName = ((Klass) oclassInfo).getName();
} else if (oclassInfo instanceof Symbol) {
outerName = (Symbol) oclassInfo;
} else {
throw new RuntimeException("should not reach here");
}
// include only if current class is outer class.
if (outerName.equals(myname) && innerName.equals(sym)) {
return true;
}
}
}
} // for inner classes
return false;
} else {
return false;
}
}