public void visitLibraryClass(LibraryClass libraryClass) {
if (shouldBeMarkedAsUsed(libraryClass)) {
markAsUsed(libraryClass);
// We're not going to analyze all library code. We're assuming that
// if this class is being used, all of its methods will be used as
// well. We'll mark them as such (here and in all subclasses).
// Mark the superclass.
Clazz superClass = libraryClass.superClass;
if (superClass != null) {
superClass.accept(this);
}
// Mark the interfaces.
Clazz[] interfaceClasses = libraryClass.interfaceClasses;
if (interfaceClasses != null) {
for (int index = 0; index < interfaceClasses.length; index++) {
if (interfaceClasses[index] != null) {
interfaceClasses[index].accept(this);
}
}
}
// Mark all methods.
libraryClass.methodsAccept(this);
}
}
/**
* Lets the given class visitor visit all known direct interfaces.
*
* @param classVisitor the <code>ClassVisitor</code> that will visit the interfaces.
*/
public void interfacesAccept(ClassVisitor classVisitor) {
if (interfaceClasses != null) {
for (int index = 0; index < interfaceClasses.length; index++) {
Clazz interfaceClass = interfaceClasses[index];
if (interfaceClass != null) {
interfaceClass.accept(classVisitor);
}
}
}
}
public void visitInnerClassesInfo(Clazz clazz, InnerClassesInfo innerClassesInfo) {
// At this point, we only mark outer classes of this class.
// Inner class can be marked later, by InnerUsageMarker.
if (innerClassesInfo.u2innerClassIndex != 0
&& clazz.getName().equals(clazz.getClassName(innerClassesInfo.u2innerClassIndex))) {
markAsUsed(innerClassesInfo);
innerClassesInfo.innerClassConstantAccept(clazz, this);
innerClassesInfo.outerClassConstantAccept(clazz, this);
innerClassesInfo.innerNameConstantAccept(clazz, this);
}
}
/**
* Marks the hierarchy of implementing or overriding methods corresponding to the given method, if
* any.
*/
protected void markMethodHierarchy(Clazz clazz, Method method) {
int accessFlags = method.getAccessFlags();
if ((accessFlags & (ClassConstants.ACC_PRIVATE | ClassConstants.ACC_STATIC)) == 0
&& !ClassUtil.isInitializer(method.getName(clazz))) {
// We can skip private and static methods in the hierarchy, and
// also abstract methods, unless they might widen a current
// non-public access.
int requiredUnsetAccessFlags =
ClassConstants.ACC_PRIVATE
| ClassConstants.ACC_STATIC
| ((accessFlags & ClassConstants.ACC_PUBLIC) == 0 ? 0 : ClassConstants.ACC_ABSTRACT);
clazz.accept(
new ConcreteClassDownTraveler(
new ClassHierarchyTraveler(
true,
true,
false,
true,
new NamedMethodVisitor(
method.getName(clazz),
method.getDescriptor(clazz),
new MemberAccessFilter(0, requiredUnsetAccessFlags, this)))));
}
}
public boolean extends_(Clazz clazz) {
if (this.equals(clazz)) {
return true;
}
return superClass != null && superClass.extends_(clazz);
}
public boolean extends_(String className) {
if (getName().equals(className)) {
return true;
}
return superClass != null && superClass.extends_(className);
}
/**
* Marks the hierarchy of implementing or overriding methods corresponding to the given method, if
* any.
*/
protected void markMethodHierarchy(Clazz clazz, Method method) {
int accessFlags = method.getAccessFlags();
if ((accessFlags & (ClassConstants.ACC_PRIVATE | ClassConstants.ACC_STATIC)) == 0
&& !ClassUtil.isInitializer(method.getName(clazz))) {
// We can skip private and static methods in the hierarchy, and
// also abstract methods, unless they might widen a current
// non-public access.
int requiredUnsetAccessFlags =
ClassConstants.ACC_PRIVATE
| ClassConstants.ACC_STATIC
| ((accessFlags & ClassConstants.ACC_PUBLIC) == 0 ? 0 : ClassConstants.ACC_ABSTRACT);
// Mark default implementations in interfaces down the hierarchy.
// TODO: This may be premature if there aren't any concrete implementing classes.
clazz.accept(
new ClassAccessFilter(
ClassConstants.ACC_ABSTRACT,
0,
new ClassHierarchyTraveler(
false,
false,
false,
true,
new ProgramClassFilter(
new ClassAccessFilter(
ClassConstants.ACC_ABSTRACT,
0,
new NamedMethodVisitor(
method.getName(clazz),
method.getDescriptor(clazz),
new MemberAccessFilter(
0, requiredUnsetAccessFlags, defaultMethodUsageMarker)))))));
// Mark other implementations.
clazz.accept(
new ConcreteClassDownTraveler(
new ClassHierarchyTraveler(
true,
true,
false,
true,
new NamedMethodVisitor(
method.getName(clazz),
method.getDescriptor(clazz),
new MemberAccessFilter(0, requiredUnsetAccessFlags, this)))));
}
}
public void hierarchyAccept(
boolean visitThisClass,
boolean visitSuperClass,
boolean visitInterfaces,
boolean visitSubclasses,
ClassVisitor classVisitor) {
// First visit the current classfile.
if (visitThisClass) {
accept(classVisitor);
}
// Then visit its superclass, recursively.
if (visitSuperClass) {
if (superClass != null) {
superClass.hierarchyAccept(true, true, visitInterfaces, false, classVisitor);
}
}
// Then visit its interfaces, recursively.
if (visitInterfaces) {
// Visit the interfaces of the superclasses, if we haven't done so yet.
if (!visitSuperClass) {
if (superClass != null) {
superClass.hierarchyAccept(false, false, true, false, classVisitor);
}
}
// Visit the interfaces.
if (interfaceClasses != null) {
for (int index = 0; index < interfaceClasses.length; index++) {
Clazz interfaceClass = interfaceClasses[index];
if (interfaceClass != null) {
interfaceClass.hierarchyAccept(true, false, true, false, classVisitor);
}
}
}
}
// Then visit its subclasses, recursively.
if (visitSubclasses) {
if (subClasses != null) {
for (int index = 0; index < subClasses.length; index++) {
subClasses[index].hierarchyAccept(true, false, false, true, classVisitor);
}
}
}
}
public void visitInvokeDynamicConstant(Clazz clazz, InvokeDynamicConstant invokeDynamicConstant) {
if (shouldBeMarkedAsUsed(invokeDynamicConstant)) {
markAsUsed(invokeDynamicConstant);
markConstant(clazz, invokeDynamicConstant.u2nameAndTypeIndex);
// Mark the bootstrap methods attribute.
clazz.attributesAccept(
new MyBootStrapMethodUsageMarker(invokeDynamicConstant.u2bootstrapMethodAttributeIndex));
}
}
public boolean extendsOrImplements(String className) {
if (getName().equals(className)) {
return true;
}
if (superClass != null && superClass.extendsOrImplements(className)) {
return true;
}
if (interfaceClasses != null) {
for (int index = 0; index < interfaceClasses.length; index++) {
Clazz interfaceClass = interfaceClasses[index];
if (interfaceClass != null && interfaceClass.extendsOrImplements(className)) {
return true;
}
}
}
return false;
}
public String toString() {
return "certain="
+ certain
+ ", depth="
+ depth
+ ": "
+ reason
+ (clazz != null ? clazz.getName() : "(none)")
+ ": "
+ (member != null ? member.getName(clazz) : "(none)");
}
public void visitConstantInstruction(
Clazz clazz,
Method method,
CodeAttribute codeAttribute,
int offset,
ConstantInstruction constantInstruction) {
markConstant(clazz, constantInstruction.constantIndex);
// Also mark the parameterless constructor of the class, in case the
// string constant or class constant is being used in a Class.forName
// or a .class construct.
clazz.constantPoolEntryAccept(
constantInstruction.constantIndex, parameterlessConstructorMarker);
}
/**
* Marks the hierarchy of implementing or overriding methods corresponding to the given method, if
* any.
*/
protected void markMethodHierarchy(Clazz clazz, Method method) {
if ((method.getAccessFlags()
& (ClassConstants.INTERNAL_ACC_PRIVATE | ClassConstants.INTERNAL_ACC_STATIC))
== 0) {
clazz.accept(
new ConcreteClassDownTraveler(
new ClassHierarchyTraveler(
true,
true,
false,
true,
new NamedMethodVisitor(
method.getName(clazz),
method.getDescriptor(clazz),
new MemberAccessFilter(
0,
ClassConstants.INTERNAL_ACC_PRIVATE
| ClassConstants.INTERNAL_ACC_STATIC
| ClassConstants.INTERNAL_ACC_ABSTRACT,
this)))));
}
}
public void visitCodeAttribute(Clazz clazz, Method method, CodeAttribute codeAttribute) {
// DEBUG =
// clazz.getName().equals("abc/Def") &&
// method.getName(clazz).equals("abc");
if (DEBUG) {
method.accept(clazz, new ClassPrinter());
}
branchTargetFinder.visitCodeAttribute(clazz, method, codeAttribute);
// Don't bother if there aren't any subroutines anyway.
if (!containsSubroutines(codeAttribute)) {
return;
}
if (DEBUG) {
System.out.println(
"SubroutineInliner: processing ["
+ clazz.getName()
+ "."
+ method.getName(clazz)
+ method.getDescriptor(clazz)
+ "]");
}
// Append the body of the code.
codeAttributeComposer.reset();
codeAttributeComposer.beginCodeFragment(codeAttribute.u4codeLength);
// Copy the non-subroutine instructions.
int offset = 0;
while (offset < codeAttribute.u4codeLength) {
Instruction instruction = InstructionFactory.create(codeAttribute.code, offset);
int instructionLength = instruction.length(offset);
// Is this returning subroutine?
if (branchTargetFinder.isSubroutine(offset)
&& branchTargetFinder.isSubroutineReturning(offset)) {
// Skip the subroutine.
if (DEBUG) {
System.out.println(
" Skipping original subroutine instruction " + instruction.toString(offset));
}
// Append a label at this offset instead.
codeAttributeComposer.appendLabel(offset);
} else {
// Copy the instruction, inlining any subroutine call recursively.
instruction.accept(clazz, method, codeAttribute, offset, this);
}
offset += instructionLength;
}
// Copy the exceptions. Note that exceptions with empty try blocks
// are automatically removed.
codeAttribute.exceptionsAccept(clazz, method, subroutineExceptionInliner);
if (DEBUG) {
System.out.println(" Appending label after code at [" + offset + "]");
}
// Append a label just after the code.
codeAttributeComposer.appendLabel(codeAttribute.u4codeLength);
// End and update the code attribute.
codeAttributeComposer.endCodeFragment();
codeAttributeComposer.visitCodeAttribute(clazz, method, codeAttribute);
if (DEBUG) {
method.accept(clazz, new ClassPrinter());
}
}
/**
* Lets the given class visitor visit the superclass, if it is known.
*
* @param classVisitor the <code>ClassVisitor</code> that will visit the superclass.
*/
public void superClassAccept(ClassVisitor classVisitor) {
if (superClass != null) {
superClass.accept(classVisitor);
}
}
/**
* Applies the given class visitor to this mark's class, if any, and if this mark doesn't have a
* member.
*/
public void acceptClassVisitor(ClassVisitor classVisitor) {
if (clazz != null && member == null) {
clazz.accept(classVisitor);
}
}
/** Returns whether this is mark is caused by the given class. */
public boolean isCausedBy(Clazz clazz) {
return clazz.equals(this.clazz);
}
public void referencedClassesAccept(ClassVisitor classVisitor) {
if (referencedClass != null) {
referencedClass.accept(classVisitor);
}
}
/**
* Marks the given constant pool entry of the given class. This includes visiting any referenced
* objects.
*/
private void markConstant(Clazz clazz, int index) {
clazz.constantPoolEntryAccept(index, this);
}