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Patches.java
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Patches.java
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package me.nallar.tickthreading.patcher;
import java.io.IOException;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.Collections;
import java.util.HashMap;
import java.util.HashSet;
import java.util.Iterator;
import java.util.List;
import java.util.Map;
import java.util.Set;
import com.google.common.base.Splitter;
import javassist.CannotCompileException;
import javassist.ClassMap;
import javassist.CtBehavior;
import javassist.CtClass;
import javassist.CtConstructor;
import javassist.CtField;
import javassist.CtMethod;
import javassist.CtNewMethod;
import javassist.CtPrimitiveType;
import javassist.Modifier;
import javassist.NotFoundException;
import javassist.bytecode.AnnotationsAttribute;
import javassist.bytecode.AttributeInfo;
import javassist.bytecode.BadBytecode;
import javassist.bytecode.ClassFile;
import javassist.bytecode.CodeAttribute;
import javassist.bytecode.CodeIterator;
import javassist.bytecode.ConstPool;
import javassist.bytecode.Descriptor;
import javassist.bytecode.MethodInfo;
import javassist.bytecode.Mnemonic;
import javassist.bytecode.Opcode;
import javassist.expr.Cast;
import javassist.expr.ConstructorCall;
import javassist.expr.ExprEditor;
import javassist.expr.FieldAccess;
import javassist.expr.Handler;
import javassist.expr.Instanceof;
import javassist.expr.MethodCall;
import javassist.expr.NewArray;
import javassist.expr.NewExpr;
import me.nallar.tickthreading.Log;
import me.nallar.tickthreading.mappings.MethodDescription;
import me.nallar.tickthreading.util.MappingUtil;
import me.nallar.unsafe.UnsafeUtil;
import org.omg.CORBA.IntHolder;
@SuppressWarnings ("MethodMayBeStatic")
public class Patches {
private final PatchManager patchManager;
private final ClassRegistry classRegistry;
public Patches(PatchManager patchManager, ClassRegistry classRegistry) {
this.patchManager = patchManager;
this.classRegistry = classRegistry;
}
@SuppressWarnings ("EmptyMethod")
@Patch
public void markDirty(CtClass ctClass) {
// A NOOP patch to make sure META-INF is removed
}
@Patch
public void remove(CtMethod ctMethod) {
ctMethod.setName(ctMethod.getName() + "_rem");
}
@Patch (
requiredAttributes = "code"
)
public void newMethod(CtClass ctClass, Map<String, String> attributes) throws CannotCompileException {
ctClass.addMethod(CtNewMethod.make(attributes.get("code"), ctClass));
}
@Patch (
requiredAttributes = "type,field"
)
public void changeFieldType(final CtClass ctClass, Map<String, String> attributes) throws CannotCompileException, NotFoundException {
final String field = attributes.get("field");
CtField oldField = ctClass.getDeclaredField(field);
oldField.setName(field + "_old");
String newType = attributes.get("type");
CtField ctField = new CtField(classRegistry.getClass(newType), field, ctClass);
ctField.setModifiers(oldField.getModifiers());
ctClass.addField(ctField);
Set<CtBehavior> allBehaviours = new HashSet<CtBehavior>();
Collections.addAll(allBehaviours, ctClass.getDeclaredConstructors());
Collections.addAll(allBehaviours, ctClass.getDeclaredMethods());
CtBehavior initialiser = ctClass.getClassInitializer();
if (initialiser != null) {
allBehaviours.add(initialiser);
}
final boolean remove = attributes.containsKey("remove");
for (CtBehavior ctBehavior : allBehaviours) {
ctBehavior.instrument(new ExprEditor() {
@Override
public void edit(FieldAccess fieldAccess) throws CannotCompileException {
if (fieldAccess.getClassName().equals(ctClass.getName()) && fieldAccess.getFieldName().equals(field)) {
if (fieldAccess.isReader()) {
if (remove) {
fieldAccess.replace("$_ = null;");
} else {
fieldAccess.replace("$_ = $0." + field + ';');
}
} else if (fieldAccess.isWriter()) {
if (remove) {
fieldAccess.replace("$_ = null;");
} else {
fieldAccess.replace("$0." + field + " = $1;");
}
}
}
}
});
}
}
@Patch (
requiredAttributes = "field",
emptyConstructor = false
)
public void replaceInitializer(final Object o, Map<String, String> attributes) throws CannotCompileException, NotFoundException {
final String field = attributes.get("field");
CtClass ctClass = o instanceof CtClass ? (CtClass) o : null;
CtBehavior ctBehavior = null;
if (ctClass == null) {
ctBehavior = (CtBehavior) o;
ctClass = ctBehavior.getDeclaringClass();
}
String ctFieldClass = attributes.get("fieldClass");
if (ctFieldClass != null) {
if (ctClass == o) {
Log.info("Must set methods to run on if using fieldClass.");
return;
}
ctClass = classRegistry.getClass(ctFieldClass);
}
final CtField ctField = ctClass.getDeclaredField(field);
String code = attributes.get("code");
String clazz = attributes.get("class");
if (code == null && clazz == null) {
throw new NullPointerException("Must give code or class");
}
final String newInitialiser = code == null ? "$_ = new " + clazz + "();" : code;
Set<CtBehavior> allBehaviours = new HashSet<CtBehavior>();
if (ctBehavior == null) {
Collections.addAll(allBehaviours, ctClass.getDeclaredConstructors());
CtBehavior initialiser = ctClass.getClassInitializer();
if (initialiser != null) {
allBehaviours.add(initialiser);
}
} else {
allBehaviours.add(ctBehavior);
}
final IntHolder replaced = new IntHolder();
for (CtBehavior ctBehavior_ : allBehaviours) {
final Map<Integer, String> newExprType = new HashMap<Integer, String>();
ctBehavior_.instrument(new ExprEditor() {
NewExpr lastNewExpr;
int newPos = 0;
@Override
public void edit(NewExpr e) {
lastNewExpr = null;
newPos++;
try {
if (classRegistry.getClass(e.getClassName()).subtypeOf(ctField.getType())) {
lastNewExpr = e;
}
} catch (NotFoundException ignored) {
}
}
@Override
public void edit(FieldAccess e) {
NewExpr myLastNewExpr = lastNewExpr;
lastNewExpr = null;
if (myLastNewExpr != null && e.getFieldName().equals(field)) {
newExprType.put(newPos, classSignatureToName(e.getSignature()));
}
}
@Override
public void edit(MethodCall e) {
lastNewExpr = null;
}
@Override
public void edit(NewArray e) {
lastNewExpr = null;
}
@Override
public void edit(Cast e) {
lastNewExpr = null;
}
@Override
public void edit(Instanceof e) {
lastNewExpr = null;
}
@Override
public void edit(Handler e) {
lastNewExpr = null;
}
@Override
public void edit(ConstructorCall e) {
lastNewExpr = null;
}
});
ctBehavior_.instrument(new ExprEditor() {
int newPos = 0;
@Override
public void edit(NewExpr e) throws CannotCompileException {
newPos++;
if (newExprType.containsKey(newPos)) {
String assignedType = newExprType.get(newPos);
String block = '{' + newInitialiser + '}';
Log.fine(assignedType + " at " + e.getFileName() + ':' + e.getLineNumber() + " replaced with " + block);
e.replace(block);
replaced.value++;
}
}
});
}
if (replaced.value == 0) {
Log.severe("No field initializers found for replacement");
}
}
@Patch
public void replaceAllInitializers(CtClass ctClass, Map<String, String> attributes) throws CannotCompileException, NotFoundException {
final String type = attributes.get("field");
final String code = attributes.get("code");
final String clazz = attributes.get("class");
if (code == null && clazz == null) {
throw new NullPointerException("Must give code or class");
}
final String newInitialiser = code == null ? "new " + clazz + "();" : code;
final Set<CtBehavior> allBehaviours = new HashSet<CtBehavior>();
Collections.addAll(allBehaviours, ctClass.getDeclaredConstructors());
final CtBehavior initialiser = ctClass.getClassInitializer();
if (initialiser != null) {
allBehaviours.add(initialiser);
}
for (CtBehavior ctBehavior : allBehaviours) {
ctBehavior.instrument(new ExprEditor() {
@Override
public void edit(NewExpr e) throws CannotCompileException {
if (e.getClassName().equals(type)) {
e.replace(newInitialiser);
}
}
});
}
}
@Patch
public void profile(CtMethod ctMethod, Map<String, String> attributes) throws CannotCompileException, NotFoundException {
CtClass ctClass = ctMethod.getDeclaringClass();
CtMethod replacement = CtNewMethod.copy(ctMethod, ctClass, null);
int i = 0;
String deobf = attributes.get("deobf");
if (deobf == null) {
deobf = ctMethod.getDeclaringClass().getName() + '/' + ctMethod.getName();
}
String suffix = '_' + deobf.replace('/', '_').replace('.', '_') + "_p";
try {
//noinspection InfiniteLoopStatement
for (; true; i++) {
ctClass.getDeclaredMethod(ctMethod.getName() + suffix + i, ctMethod.getParameterTypes());
}
} catch (NotFoundException ignored) {
}
ctMethod.setName(ctMethod.getName() + suffix + i);
if (ctMethod.getReturnType() == CtPrimitiveType.voidType) {
replacement.setBody("{ boolean timings = javassist.is.faulty.Timings.enabled; long st = 0; if (timings) { st = System.nanoTime(); } " + ctMethod.getName() + "($$); if (timings) { javassist.is.faulty.Timings.record(\"" + deobf + "\", System.nanoTime() - st); } }");
} else {
replacement.setBody("{ boolean timings = javassist.is.faulty.Timings.enabled; long st = 0; if (timings) { st = System.nanoTime(); } try { return " + ctMethod.getName() + "($$); } finally { if (timings) { javassist.is.faulty.Timings.record(\"" + deobf + "\", System.nanoTime() - st); } } }");
}
ctClass.addMethod(replacement);
}
@Patch (
name = "volatile"
)
public void volatile_(CtClass ctClass, Map<String, String> attributes) throws NotFoundException {
String field = attributes.get("field");
if (field == null) {
for (CtField ctField : ctClass.getDeclaredFields()) {
if (ctField.getType().isPrimitive()) {
ctField.setModifiers(ctField.getModifiers() | Modifier.VOLATILE);
}
}
} else {
CtField ctField = ctClass.getDeclaredField(field);
ctField.setModifiers(ctField.getModifiers() | Modifier.VOLATILE);
}
}
@Patch (
name = "final"
)
public void final_(CtClass ctClass, Map<String, String> attributes) throws NotFoundException {
String field = attributes.get("field");
if (field == null) {
for (CtField ctField : ctClass.getDeclaredFields()) {
if (ctField.getType().isPrimitive()) {
ctField.setModifiers(ctField.getModifiers() | Modifier.FINAL);
}
}
} else {
CtField ctField = ctClass.getDeclaredField(field);
ctField.setModifiers(ctField.getModifiers() | Modifier.FINAL);
}
}
@Patch
public void disable(CtMethod ctMethod, Map<String, String> attributes) throws NotFoundException, CannotCompileException {
ctMethod.setBody("{ }");
}
@Patch (
requiredAttributes = "class"
)
public CtClass replace(CtClass clazz, Map<String, String> attributes) throws NotFoundException, CannotCompileException, BadBytecode {
String fromClass = attributes.get("class");
String oldName = clazz.getName();
clazz.setName(oldName + "_old");
CtClass newClass = classRegistry.getClass(fromClass);
ClassFile classFile = newClass.getClassFile2();
if (classFile.getSuperclass().equals(oldName)) {
classFile.setSuperclass(null);
for (CtConstructor ctBehavior : newClass.getDeclaredConstructors()) {
javassist.bytecode.MethodInfo methodInfo = ctBehavior.getMethodInfo2();
CodeAttribute codeAttribute = methodInfo.getCodeAttribute();
if (codeAttribute != null) {
CodeIterator iterator = codeAttribute.iterator();
int pos = iterator.skipSuperConstructor();
if (pos >= 0) {
int mref = iterator.u16bitAt(pos + 1);
ConstPool constPool = codeAttribute.getConstPool();
iterator.write16bit(constPool.addMethodrefInfo(constPool.addClassInfo("java.lang.Object"), "<init>", "()V"), pos + 1);
String desc = constPool.getMethodrefType(mref);
int num = Descriptor.numOfParameters(desc) + 1;
pos = iterator.insertGapAt(pos, num, false).position;
Descriptor.Iterator i$ = new Descriptor.Iterator(desc);
for (i$.next(); i$.isParameter(); i$.next()) {
iterator.writeByte(i$.is2byte() ? Opcode.POP2 : Opcode.POP, pos++);
}
}
methodInfo.rebuildStackMapIf6(newClass.getClassPool(), newClass.getClassFile2());
}
}
}
newClass.setName(oldName);
newClass.setModifiers(newClass.getModifiers() & ~Modifier.ABSTRACT);
publicInnerClasses(fromClass);
return newClass;
}
@Patch
public void publicInnerClasses(String outer) {
boolean exists = true;
for (int i = 1; exists; i++) {
try {
String innerName = outer + '$' + i;
CtClass innerClass = classRegistry.getClass(innerName);
public_(innerClass, Collections.<String, String>emptyMap());
Log.info("Made " + innerName + " public.");
patchManager.patchingClasses.put(innerName, innerClass);
} catch (NotFoundException e) {
exists = false;
}
}
}
@Patch
public void replaceMethod(CtBehavior method, Map<String, String> attributes) throws NotFoundException, CannotCompileException, BadBytecode {
String fromClass = attributes.get("fromClass");
String code = attributes.get("code");
String field = attributes.get("field");
if (field != null) {
code = code.replace("$field", field);
}
if (fromClass != null) {
String fromMethod = attributes.get("fromMethod");
CtMethod replacingMethod = fromMethod == null ?
classRegistry.getClass(fromClass).getDeclaredMethod(method.getName(), method.getParameterTypes())
: MethodDescription.fromString(fromClass, fromMethod).inClass(classRegistry.getClass(fromClass));
replaceMethod((CtMethod) method, replacingMethod);
} else if (code != null) {
method.setBody(code);
} else {
Log.severe("Missing required attributes for replaceMethod");
}
}
private void replaceMethod(CtMethod oldMethod, CtMethod newMethod) throws CannotCompileException, BadBytecode {
ClassMap classMap = new ClassMap();
classMap.put(newMethod.getDeclaringClass().getName(), oldMethod.getDeclaringClass().getName());
oldMethod.setBody(newMethod, classMap);
oldMethod.getMethodInfo().rebuildStackMap(classRegistry.classes);
oldMethod.getMethodInfo().rebuildStackMapForME(classRegistry.classes);
}
@Patch (
requiredAttributes = "field"
)
public void replaceFieldUsage(final CtBehavior ctBehavior, Map<String, String> attributes) throws CannotCompileException {
final String field = attributes.get("field");
final String readCode = attributes.get("readCode");
final String writeCode = attributes.get("writeCode");
final String clazz = attributes.get("class");
if (readCode == null && writeCode == null) {
throw new IllegalArgumentException("readCode or writeCode must be set");
}
ctBehavior.instrument(new ExprEditor() {
@Override
public void edit(FieldAccess fieldAccess) throws CannotCompileException {
if (fieldAccess.getFieldName().equals(field) && (clazz == null || fieldAccess.getClassName().equals(clazz))) {
if (fieldAccess.isWriter() && writeCode != null) {
fieldAccess.replace(writeCode);
} else if (fieldAccess.isReader() && readCode != null) {
fieldAccess.replace(readCode);
Log.info("Replaced in " + ctBehavior + ' ' + fieldAccess.getFieldName() + " read with " + readCode);
}
}
}
});
}
@Patch
public void replaceMethodCall(final CtBehavior ctBehavior, Map<String, String> attributes) throws CannotCompileException {
String method_ = attributes.get("method");
if (method_ == null) {
method_ = "";
}
String className_ = null;
int dotIndex = method_.lastIndexOf('.');
if (dotIndex != -1) {
className_ = method_.substring(0, dotIndex);
method_ = method_.substring(dotIndex + 1);
}
if ("self".equals(className_)) {
className_ = ctBehavior.getDeclaringClass().getName();
}
String index_ = attributes.get("index");
if (index_ == null) {
index_ = "-1";
}
final String method = method_;
final String className = className_;
final String newMethod = attributes.get("newMethod");
String code_ = attributes.get("code");
if (code_ == null) {
code_ = "$_ = $0." + newMethod + "($$);";
}
final String code = code_;
final IntHolder replaced = new IntHolder();
final int index = Integer.valueOf(index_);
ctBehavior.instrument(new ExprEditor() {
private int currentIndex = 0;
@Override
public void edit(MethodCall methodCall) throws CannotCompileException {
if ((className == null || methodCall.getClassName().equals(className)) && (method.isEmpty() || methodCall.getMethodName().equals(method)) && (index == -1 || currentIndex++ == index)) {
if (newMethod != null) {
try {
CtMethod oldMethod = methodCall.getMethod();
oldMethod.getDeclaringClass().getDeclaredMethod(newMethod, oldMethod.getParameterTypes());
} catch (NotFoundException e) {
return;
}
}
replaced.value++;
Log.info("Replaced call to " + methodCall.getClassName() + '/' + methodCall.getMethodName() + " in " + ctBehavior.getLongName());
methodCall.replace(code);
}
}
});
if (replaced.value == 0 && !attributes.containsKey("^all^")) {
Log.warning("Didn't find any method calls to replace");
}
}
@Patch (
requiredAttributes = "code,return,name"
)
public void addMethod(CtClass ctClass, Map<String, String> attributes) throws NotFoundException, CannotCompileException {
String name = attributes.get("name");
String return_ = attributes.get("return");
String code = attributes.get("code");
String parameterNamesList = attributes.get("parameters");
parameterNamesList = parameterNamesList == null ? "" : parameterNamesList;
List<CtClass> parameterList = new ArrayList<CtClass>();
for (String parameterName : Splitter.on(',').trimResults().omitEmptyStrings().split(parameterNamesList)) {
parameterList.add(classRegistry.getClass(parameterName));
}
CtMethod newMethod = new CtMethod(classRegistry.getClass(return_), name, parameterList.toArray(new CtClass[parameterList.size()]), ctClass);
newMethod.setBody('{' + code + '}');
ctClass.addMethod(newMethod);
}
@Patch (
requiredAttributes = "opcode"
)
public void removeUntilOpcode(CtBehavior ctBehavior, Map<String, String> attributes) throws BadBytecode {
int opcode = Arrays.asList(Mnemonic.OPCODE).indexOf(attributes.get("opcode").toLowerCase());
String removeIndexString = attributes.get("index");
int removeIndex = removeIndexString == null ? -1 : Integer.parseInt(removeIndexString);
int currentIndex = 0;
Log.info("Removing until " + attributes.get("opcode") + ':' + opcode + " at " + removeIndex);
CtClass ctClass = ctBehavior.getDeclaringClass();
MethodInfo methodInfo = ctBehavior.getMethodInfo2();
CodeAttribute codeAttribute = methodInfo.getCodeAttribute();
if (codeAttribute != null) {
CodeIterator iterator = codeAttribute.iterator();
while (iterator.hasNext()) {
int index = iterator.next();
int op = iterator.byteAt(index);
if (op == opcode && (removeIndex == -1 || removeIndex == ++currentIndex)) {
for (int i = 0; i <= index; i++) {
iterator.writeByte(Opcode.NOP, i);
}
}
}
methodInfo.rebuildStackMapIf6(ctClass.getClassPool(), ctClass.getClassFile2());
}
}
@Patch (
requiredAttributes = "fromClass"
)
public void addAll(CtClass ctClass, Map<String, String> attributes) throws NotFoundException, CannotCompileException, BadBytecode {
String fromClass = attributes.get("fromClass");
CtClass from = classRegistry.getClass(fromClass);
ClassMap classMap = new ClassMap();
classMap.put(fromClass, ctClass.getName());
for (CtField ctField : from.getDeclaredFields()) {
if (!ctField.getName().isEmpty() && ctField.getName().charAt(ctField.getName().length() - 1) == '_') {
ctField.setName(ctField.getName().substring(0, ctField.getName().length() - 1));
}
try {
ctClass.getDeclaredField(ctField.getName());
} catch (NotFoundException ignored) {
ctClass.addField(new CtField(ctField, ctClass));
}
}
for (CtMethod newMethod : from.getDeclaredMethods()) {
if ((newMethod.getName().startsWith("construct") || newMethod.getName().startsWith("staticConstruct"))) {
try {
ctClass.getDeclaredMethod(newMethod.getName());
boolean found = true;
int i = 0;
String name = newMethod.getName();
while (found) {
i++;
try {
ctClass.getDeclaredMethod(name + i);
} catch (NotFoundException e2) {
found = false;
}
}
newMethod.setName(name + i);
} catch (NotFoundException ignored) {
// Not found - no need to change the name
}
}
}
for (CtMethod newMethod : from.getDeclaredMethods()) {
try {
CtMethod oldMethod = ctClass.getDeclaredMethod(newMethod.getName(), newMethod.getParameterTypes());
replaceMethod(oldMethod, newMethod);
} catch (NotFoundException ignored) {
CtMethod added = CtNewMethod.copy(newMethod, ctClass, classMap);
ctClass.addMethod(added);
MethodInfo addedMethodInfo = added.getMethodInfo2();
String addedDescriptor = addedMethodInfo.getDescriptor();
String newDescriptor = newMethod.getMethodInfo2().getDescriptor();
if (!newDescriptor.equals(addedDescriptor)) {
addedMethodInfo.setDescriptor(newDescriptor);
}
replaceMethod(added, newMethod);
if (added.getName().startsWith("construct")) {
try {
insertSuper(added);
} catch (CannotCompileException ignore) {
}
CtMethod runConstructors;
try {
runConstructors = ctClass.getMethod("runConstructors", "()V");
} catch (NotFoundException e) {
runConstructors = CtNewMethod.make("public void runConstructors() { }", ctClass);
ctClass.addMethod(runConstructors);
try {
ctClass.getField("isConstructed");
} catch (NotFoundException ignore) {
ctClass.addField(new CtField(classRegistry.getClass("boolean"), "isConstructed", ctClass));
}
for (CtBehavior ctBehavior : ctClass.getDeclaredConstructors()) {
ctBehavior.insertAfter("{ if(!this.isConstructed) { this.isConstructed = true; this.runConstructors(); } }");
}
}
try {
ctClass.getSuperclass().getMethod(added.getName(), "()V");
} catch (NotFoundException ignore) {
runConstructors.insertAfter(added.getName() + "();");
}
}
if (added.getName().startsWith("staticConstruct")) {
ctClass.makeClassInitializer().insertAfter("{ " + added.getName() + "(); }");
}
}
}
for (CtClass CtInterface : from.getInterfaces()) {
ctClass.addInterface(CtInterface);
}
publicInnerClasses(fromClass);
}
@Patch (
requiredAttributes = "field,threadLocalField,type"
)
public void threadLocal(CtClass ctClass, Map<String, String> attributes) throws CannotCompileException {
final String field = attributes.get("field");
final String threadLocalField = attributes.get("threadLocalField");
final String type = attributes.get("type");
String setExpression_ = attributes.get("setExpression");
final String setExpression = setExpression_ == null ? '(' + type + ") $1" : setExpression_;
Log.info(field + " -> " + threadLocalField);
ctClass.instrument(new ExprEditor() {
@Override
public void edit(FieldAccess e) throws CannotCompileException {
if (e.getFieldName().equals(field)) {
if (e.isReader()) {
e.replace("{ $_ = (" + type + ") " + threadLocalField + ".get(); }");
} else if (e.isWriter()) {
e.replace("{ " + threadLocalField + ".set(" + setExpression + "); }");
}
}
}
});
}
@Patch (
requiredAttributes = "field,threadLocalField"
)
public void threadLocalBoolean(CtClass ctClass, Map<String, String> attributes) throws CannotCompileException {
final String field = attributes.get("field");
final String threadLocalField = attributes.get("threadLocalField");
Log.info(field + " -> " + threadLocalField);
for (CtConstructor ctConstructor : ctClass.getDeclaredConstructors()) {
ctConstructor.instrument(new ExprEditor() {
@Override
public void edit(FieldAccess e) throws CannotCompileException {
if (e.getFieldName().equals(field)) {
if (e.isWriter()) {
e.replace("{ }");
}
}
}
});
}
ctClass.instrument(new ExprEditor() {
@Override
public void edit(FieldAccess e) throws CannotCompileException {
if (e.getFieldName().equals(field)) {
if (e.isReader()) {
e.replace("{ $_ = ((Boolean) " + threadLocalField + ".get()).booleanValue(); }");
} else if (e.isWriter()) {
e.replace("{ " + threadLocalField + ".set(Boolean.valueOf($1)); }");
}
}
}
});
}
@Patch (
name = "public",
emptyConstructor = false
)
public void public_(Object o, Map<String, String> attributes) throws NotFoundException {
String field = attributes.get("field");
if (field != null) {
CtClass ctClass = (CtClass) o;
CtField ctField = ctClass.getDeclaredField(field);
ctField.setModifiers(Modifier.setPublic(ctField.getModifiers()));
} else if (o instanceof CtClass) {
CtClass ctClass = (CtClass) o;
ctClass.setModifiers(Modifier.setPublic(ctClass.getModifiers()));
for (CtConstructor ctConstructor : ctClass.getDeclaredConstructors()) {
public_(ctConstructor, Collections.<String, String>emptyMap());
}
} else {
CtBehavior ctBehavior = (CtBehavior) o;
ctBehavior.setModifiers(Modifier.setPublic(ctBehavior.getModifiers()));
}
}
@Patch (
emptyConstructor = false
)
public void noFinal(Object o, Map<String, String> attributes) throws NotFoundException {
String field = attributes.get("field");
if (field != null) {
CtClass ctClass = (CtClass) o;
CtField ctField = ctClass.getDeclaredField(field);
ctField.setModifiers(Modifier.clear(ctField.getModifiers(), Modifier.FINAL));
} else if (o instanceof CtClass) {
CtClass ctClass = (CtClass) o;
ctClass.setModifiers(Modifier.setPublic(ctClass.getModifiers()));
for (CtConstructor ctConstructor : ctClass.getDeclaredConstructors()) {
public_(ctConstructor, Collections.<String, String>emptyMap());
}
} else {
CtBehavior ctBehavior = (CtBehavior) o;
ctBehavior.setModifiers(Modifier.clear(ctBehavior.getModifiers(), Modifier.FINAL));
}
}
@Patch (
requiredAttributes = "field"
)
public void newInitializer(CtClass ctClass, Map<String, String> attributes) throws NotFoundException, CannotCompileException, IOException {
String field = attributes.get("field");
String clazz = attributes.get("class");
String initialise = attributes.get("code");
String arraySize = attributes.get("arraySize");
initialise = "{ " + field + " = " + (initialise == null ? ("new " + clazz + (arraySize == null ? "()" : '[' + arraySize + ']')) : initialise) + "; }";
if ((ctClass.getDeclaredField(field).getModifiers() & Modifier.STATIC) == Modifier.STATIC) {
ctClass.makeClassInitializer().insertAfter(initialise);
} else {
CtMethod runConstructors;
try {
runConstructors = ctClass.getDeclaredMethod("runConstructors");
} catch (NotFoundException e) {
runConstructors = CtNewMethod.make("public void runConstructors() { }", ctClass);
ctClass.addMethod(runConstructors);
ctClass.addField(new CtField(classRegistry.getClass("boolean"), "isConstructed", ctClass), CtField.Initializer.constant(false));
for (CtBehavior ctBehavior : ctClass.getDeclaredConstructors()) {
ctBehavior.insertAfter("{ if(!this.isConstructed) { this.isConstructed = true; this.runConstructors(); } }");
}
}
runConstructors.insertAfter(initialise);
}
}
@Patch (
requiredAttributes = "field"
)
public void replaceField(CtClass ctClass, Map<String, String> attributes) throws NotFoundException, CannotCompileException, IOException {
String field = attributes.get("field");
String clazz = attributes.get("class");
String type = attributes.get("type");
if (type == null) {
type = clazz;
}
String initialise = attributes.get("code");
String arraySize = attributes.get("arraySize");
initialise = "{ " + field + " = " + (initialise == null ? ("new " + clazz + (arraySize == null ? "()" : '[' + arraySize + ']')) : initialise) + "; }";
CtField oldField = ctClass.getDeclaredField(field);
oldField.setName(oldField.getName() + "_rem");
CtField newField = new CtField(classRegistry.getClass(type), field, ctClass);
newField.setModifiers(oldField.getModifiers());
ctClass.addField(newField);
for (CtConstructor ctConstructor : ctClass.getConstructors()) {
ctConstructor.insertAfter(initialise);
}
}
@Patch (
requiredAttributes = "field,class"
)
public void newField(CtClass ctClass, Map<String, String> attributes) throws NotFoundException, CannotCompileException, IOException {
String field = attributes.get("field");
String clazz = attributes.get("class");
String initialise = attributes.get("code");
if (initialise == null) {
initialise = "new " + clazz + "();";
}
try {
CtField ctField = ctClass.getDeclaredField(field);
Log.warning(field + " already exists as " + ctField);
return;
} catch (NotFoundException ignored) {
}
CtClass newType = classRegistry.getClass(clazz);
CtField ctField = new CtField(newType, field, ctClass);
if (attributes.get("static") != null) {
ctField.setModifiers(ctField.getModifiers() | Modifier.STATIC);
}
ctField.setModifiers(Modifier.setPublic(ctField.getModifiers()));
if ("none".equalsIgnoreCase(initialise)) {
ctClass.addField(ctField);
} else {
CtField.Initializer initializer = CtField.Initializer.byExpr(initialise);
ctClass.addField(ctField, initializer);
}
}
@Patch (
requiredAttributes = "code"
)
public void insertBefore(CtBehavior ctBehavior, Map<String, String> attributes) throws NotFoundException, CannotCompileException, IOException {
String field = attributes.get("field");
String code = attributes.get("code");
if (field != null) {
code = code.replace("$field", field);
}
ctBehavior.insertBefore(code);
}
@Patch (
requiredAttributes = "code"
)
public void insertAfter(CtBehavior ctBehavior, Map<String, String> attributes) throws NotFoundException, CannotCompileException, IOException {
String field = attributes.get("field");
String code = attributes.get("code");
if (field != null) {
code = code.replace("$field", field);
}
ctBehavior.insertAfter(code, attributes.containsKey("finally"));
}
@Patch
public void insertSuper(CtBehavior ctBehavior) throws CannotCompileException {
ctBehavior.insertBefore("super." + ctBehavior.getName() + "($$);");
}
@Patch (
requiredAttributes = "field"
)
public void lock(CtMethod ctMethod, Map<String, String> attributes) throws NotFoundException, CannotCompileException, IOException {
String field = attributes.get("field");
ctMethod.insertBefore("this." + field + ".lock();");
ctMethod.insertAfter("this." + field + ".unlock();", true);
}
@Patch (
requiredAttributes = "field"
)
public void lockMethodCall(final CtBehavior ctBehavior, Map<String, String> attributes) throws CannotCompileException {
String method_ = attributes.get("method");
if (method_ == null) {
method_ = "";
}
String className_ = null;
int dotIndex = method_.indexOf('.');
if (dotIndex != -1) {
className_ = method_.substring(0, dotIndex);
method_ = method_.substring(dotIndex + 1);
}
String index_ = attributes.get("index");
if (index_ == null) {
index_ = "-1";
}
final String method = method_;
final String className = className_;
final String field = attributes.get("field");
final int index = Integer.valueOf(index_);
ctBehavior.instrument(new ExprEditor() {
private int currentIndex = 0;
@Override
public void edit(MethodCall methodCall) throws CannotCompileException {
if ((className == null || methodCall.getClassName().equals(className)) && (method.isEmpty() || methodCall.getMethodName().equals(method)) && (index == -1 || currentIndex++ == index)) {
Log.info("Replaced " + methodCall + " from " + ctBehavior);
methodCall.replace("{ " + field + ".lock(); try { $_ = $proceed($$); } finally { " + field + ".unlock(); } }");
}
}
});
}
@Patch (
requiredAttributes = "field"
)
public void synchronizeMethodCall(final CtBehavior ctBehavior, Map<String, String> attributes) throws CannotCompileException {
String method_ = attributes.get("method");
if (method_ == null) {
method_ = "";
}
String className_ = null;
int dotIndex = method_.indexOf('.');
if (dotIndex != -1) {
className_ = method_.substring(0, dotIndex);
method_ = method_.substring(dotIndex + 1);
}
String index_ = attributes.get("index");
if (index_ == null) {
index_ = "-1";
}
final String method = method_;
final String className = className_;
final String field = attributes.get("field");
final int index = Integer.valueOf(index_);
ctBehavior.instrument(new ExprEditor() {
private int currentIndex = 0;
@Override
public void edit(MethodCall methodCall) throws CannotCompileException {
if ((className == null || methodCall.getClassName().equals(className)) && (method.isEmpty() || methodCall.getMethodName().equals(method)) && (index == -1 || currentIndex++ == index)) {
Log.info("Replaced " + methodCall + " from " + ctBehavior);
methodCall.replace("synchronized(" + field + ") { $_ = $0.$proceed($$); }");
}
}
});
}
@Patch (
emptyConstructor = false
)
public void synchronize(Object o, Map<String, String> attributes) throws CannotCompileException {
//noinspection StatementWithEmptyBody
if (o instanceof CtConstructor) {
} else if (o instanceof CtMethod) {
synchronize((CtMethod) o, attributes.get("field"));
} else {
int synchronized_ = 0;
boolean static_ = attributes.containsKey("static");
for (CtMethod ctMethod : ((CtClass) o).getDeclaredMethods()) {
boolean isStatic = (ctMethod.getModifiers() & Modifier.STATIC) == Modifier.STATIC;
if (isStatic == static_) {
synchronize(ctMethod, attributes.get("field"));
synchronized_++;
}
}
if (synchronized_ == 0) {
Log.severe("Nothing synchronized - did you forget the 'static' attribute?");
} else {
Log.info("Synchronized " + synchronized_ + " methods.");
}
}
}
private void synchronize(CtMethod ctMethod, String field) throws CannotCompileException {
if (field == null) {
int currentModifiers = ctMethod.getModifiers();
if (Modifier.isSynchronized(currentModifiers)) {
Log.warning("Method: " + ctMethod.getLongName() + " is already synchronized");
} else {
ctMethod.setModifiers(currentModifiers | Modifier.SYNCHRONIZED);
}
} else {
CtClass ctClass = ctMethod.getDeclaringClass();
CtMethod replacement = CtNewMethod.copy(ctMethod, ctClass, null);
int i = 0;
try {
//noinspection InfiniteLoopStatement
for (; true; i++) {
ctClass.getDeclaredMethod(ctMethod.getName() + "_sync" + i);
}
} catch (NotFoundException ignored) {
}
ctMethod.setName(ctMethod.getName() + "_sync" + i);
List<AttributeInfo> attributes = ctMethod.getMethodInfo().getAttributes();
Iterator<AttributeInfo> attributeInfoIterator = attributes.iterator();
while (attributeInfoIterator.hasNext()) {
AttributeInfo attributeInfo = attributeInfoIterator.next();
if (attributeInfo instanceof AnnotationsAttribute) {
attributeInfoIterator.remove();
replacement.getMethodInfo().addAttribute(attributeInfo);
}
}
replacement.setBody("synchronized(" + field + ") { return " + ctMethod.getName() + "($$); }");
ctClass.addMethod(replacement);
}
}
@Patch (
requiredAttributes = "field"
)
public void synchronizeNotNull(CtMethod ctMethod, Map<String, String> attributes) throws CannotCompileException {
String field = attributes.get("field");
CtClass ctClass = ctMethod.getDeclaringClass();
CtMethod replacement = CtNewMethod.copy(ctMethod, ctClass, null);
int i = 0;
try {
//noinspection InfiniteLoopStatement
for (; true; i++) {
ctClass.getDeclaredMethod(ctMethod.getName() + "_sync" + i);
}
} catch (NotFoundException ignored) {
}