private Function createClassInitWrapperFunction(FunctionRef targetFn) {
   Function fn = FunctionBuilder.clinitWrapper(targetFn);
   Value info = getInfoStruct(fn);
   Variable infoHeader = fn.newVariable(new PointerType(new StructureType(I8_PTR, I32)));
   fn.add(new Bitcast(infoHeader, info, infoHeader.getType()));
   Variable infoHeaderFlags = fn.newVariable(new PointerType(I32));
   fn.add(new Getelementptr(infoHeaderFlags, infoHeader.ref(), 0, 1));
   Variable flags = fn.newVariable(I32);
   fn.add(new Load(flags, infoHeaderFlags.ref()));
   Variable initializedFlag = fn.newVariable(I32);
   fn.add(new And(initializedFlag, flags.ref(), new IntegerConstant(CI_INITIALIZED)));
   Variable initialized = fn.newVariable(I1);
   fn.add(
       new Icmp(
           initialized,
           Icmp.Condition.eq,
           initializedFlag.ref(),
           new IntegerConstant(CI_INITIALIZED)));
   Label trueLabel = new Label();
   Label falseLabel = new Label();
   fn.add(
       new Br(initialized.ref(), fn.newBasicBlockRef(trueLabel), fn.newBasicBlockRef(falseLabel)));
   fn.newBasicBlock(trueLabel);
   Value result = call(fn, targetFn, fn.getParameterRefs());
   fn.add(new Ret(result));
   fn.newBasicBlock(falseLabel);
   call(fn, BC_INITIALIZE_CLASS, fn.getParameterRef(0), info);
   fn.add(new Br(fn.newBasicBlockRef(trueLabel)));
   return fn;
 }
  protected Value marshalObjectToNative(
      Function fn,
      MarshalerMethod marshalerMethod,
      MarshaledArg marshaledArg,
      Type nativeType,
      Value env,
      Value object,
      long flags) {

    Invokestatic invokestatic = marshalerMethod.getInvokeStatic(sootMethod.getDeclaringClass());
    trampolines.add(invokestatic);
    Value handle = call(fn, invokestatic.getFunctionRef(), env, object, new IntegerConstant(flags));

    Variable nativeValue = fn.newVariable(nativeType);
    if (nativeType instanceof StructureType || nativeType instanceof ArrayType) {
      Variable tmp = fn.newVariable(new PointerType(nativeType));
      fn.add(new Inttoptr(tmp, handle, tmp.getType()));
      fn.add(new Load(nativeValue, tmp.ref()));
    } else {
      fn.add(new Inttoptr(nativeValue, handle, nativeType));
    }

    if (marshaledArg != null) {
      marshaledArg.handle = handle;
      marshaledArg.object = object;
    }

    return nativeValue.ref();
  }
  private void createLookupFunction(SootMethod m) {
    // TODO: This should use a virtual method table or interface method table.
    Function function = FunctionBuilder.lookup(m);
    mb.addFunction(function);

    Variable reserved0 = function.newVariable(I8_PTR_PTR);
    function.add(new Getelementptr(reserved0, function.getParameterRef(0), 0, 4));
    Variable reserved1 = function.newVariable(I8_PTR_PTR);
    function.add(new Getelementptr(reserved1, function.getParameterRef(0), 0, 5));
    function.add(new Store(getString(m.getName()), reserved0.ref()));
    function.add(new Store(getString(getDescriptor(m)), reserved1.ref()));

    Value lookupFn =
        sootClass.isInterface() ? BC_LOOKUP_INTERFACE_METHOD : BC_LOOKUP_VIRTUAL_METHOD;
    List<Value> args = new ArrayList<Value>();
    args.add(function.getParameterRef(0));
    if (sootClass.isInterface()) {
      Value info = getInfoStruct(function);
      args.add(info);
    }
    args.add(function.getParameterRef(1));
    args.add(getString(m.getName()));
    args.add(getString(getDescriptor(m)));
    Value fptr = call(function, lookupFn, args);
    Variable f = function.newVariable(function.getType());
    function.add(new Bitcast(f, fptr, f.getType()));
    Value result = call(function, f.ref(), function.getParameterRefs());
    function.add(new Ret(result));
  }
Exemple #4
0
 public static Value getFieldPtr(Function f, Value base, Constant offset, Type fieldType) {
   Variable baseI8Ptr = f.newVariable(I8_PTR);
   f.add(new Bitcast(baseI8Ptr, base, I8_PTR));
   Variable fieldI8Ptr = f.newVariable(I8_PTR);
   f.add(new Getelementptr(fieldI8Ptr, baseI8Ptr.ref(), offset));
   Variable fieldPtr = f.newVariable(new PointerType(fieldType));
   f.add(new Bitcast(fieldPtr, fieldI8Ptr.ref(), fieldPtr.getType()));
   return fieldPtr.ref();
 }
  protected Value marshalNativeToArray(
      Function fn,
      MarshalerMethod marshalerMethod,
      Value env,
      String arrayClassName,
      Value nativeValue,
      long flags,
      int[] dimensions) {

    Invokestatic invokeToObject = marshalerMethod.getInvokeStatic(sootMethod.getDeclaringClass());
    trampolines.add(invokeToObject);

    Variable handle = fn.newVariable(I64);
    fn.add(new Ptrtoint(handle, nativeValue, I64));

    Value valueClass = ldcClass(fn, arrayClassName, env);
    List<Value> args = new ArrayList<>();
    args.add(env);
    args.add(valueClass);
    args.add(handle.ref());
    args.add(new IntegerConstant(flags));
    args.addAll(arrayDimensionsValues(dimensions));

    return call(fn, invokeToObject.getFunctionRef(), args);
  }
 protected Value marshalDoubleToMachineSizedFloat(Function fn, Value value) {
   if (config.getArch().is32Bit()) {
     Variable result = fn.newVariable(FLOAT);
     fn.add(new Fptrunc(result, value, FLOAT));
     return result.ref();
   } else {
     return value;
   }
 }
 protected Value marshalMachineSizedUIntToLong(Function fn, Value value) {
   if (config.getArch().is32Bit()) {
     Variable result = fn.newVariable(I64);
     fn.add(new Zext(result, value, I64));
     return result.ref();
   } else {
     return value;
   }
 }
 protected Value marshalFloatToMachineSizedFloat(Function fn, Value value) {
   if (!config.getArch().is32Bit()) {
     Variable result = fn.newVariable(DOUBLE);
     fn.add(new Fpext(result, value, DOUBLE));
     return result.ref();
   } else {
     return value;
   }
 }
 protected Value marshalLongToMachineSizedInt(Function fn, Value value) {
   if (config.getArch().is32Bit()) {
     Variable result = fn.newVariable(I32);
     fn.add(new Trunc(result, value, I32));
     return result.ref();
   } else {
     return value;
   }
 }
Exemple #10
0
 private Value getClassFieldPtr(Function f, SootField field) {
   Value info = getInfoStruct(f);
   Variable base = f.newVariable(I8_PTR);
   f.add(new Load(base, info));
   return getFieldPtr(
       f,
       new VariableRef(base),
       offsetof(classType, 1, classFields.indexOf(field), 1),
       getType(field.getType()));
 }
Exemple #11
0
 private Function createFieldGetter(SootField field) {
   Function fn = FunctionBuilder.getter(field);
   Value fieldPtr = null;
   if (field.isStatic()) {
     fieldPtr = getClassFieldPtr(fn, field);
   } else {
     fieldPtr = getInstanceFieldPtr(fn, fn.getParameterRef(1), field);
   }
   Variable result = fn.newVariable(getType(field.getType()));
   if (Modifier.isVolatile(field.getModifiers())) {
     fn.add(new Fence(Ordering.seq_cst));
     if (LongType.v().equals(field.getType())) {
       fn.add(new Load(result, fieldPtr, false, Ordering.unordered, 8));
     } else {
       fn.add(new Load(result, fieldPtr));
     }
   } else {
     fn.add(new Load(result, fieldPtr));
   }
   fn.add(new Ret(new VariableRef(result)));
   return fn;
 }
 protected Value ldcClass(Function fn, String name, Value env) {
   if (isArray(name) && isPrimitiveBaseType(name)) {
     String primitiveDesc = name.substring(name.length() - 1);
     Variable result = fn.newVariable(OBJECT_PTR);
     fn.add(
         new Load(
             result,
             new ConstantBitcast(
                 new GlobalRef("array_" + primitiveDesc, CLASS_PTR),
                 new PointerType(OBJECT_PTR))));
     return result.ref();
   } else {
     FunctionRef ldcClassFn = null;
     if (name.equals(this.className)) {
       ldcClassFn = FunctionBuilder.ldcInternal(this.className).ref();
     } else {
       Trampoline trampoline = new LdcClass(this.className, name);
       trampolines.add(trampoline);
       ldcClassFn = trampoline.getFunctionRef();
     }
     return call(fn, ldcClassFn, env);
   }
 }
  protected Value marshalNativeToObject(
      Function fn,
      MarshalerMethod marshalerMethod,
      MarshaledArg marshaledArg,
      Value env,
      String valueClassName,
      Value nativeValue,
      long flags) {

    if (nativeValue.getType() instanceof StructureType) {
      nativeValue = createStackCopy(fn, nativeValue);
    }

    Invokestatic invokestatic = marshalerMethod.getInvokeStatic(sootMethod.getDeclaringClass());
    trampolines.add(invokestatic);

    Value valueClass = ldcClass(fn, valueClassName, env);

    Variable handle = fn.newVariable(I64);
    fn.add(new Ptrtoint(handle, nativeValue, I64));

    Value object =
        call(
            fn,
            invokestatic.getFunctionRef(),
            env,
            valueClass,
            handle.ref(),
            new IntegerConstant(flags));

    if (marshaledArg != null) {
      marshaledArg.handle = handle.ref();
      marshaledArg.object = object;
    }

    return object;
  }
  protected void marshalArrayToNative(
      Function fn,
      MarshalerMethod marshalerMethod,
      Value env,
      Value object,
      Value destPtr,
      long flags,
      int[] dimensions) {

    Invokestatic invokestatic = marshalerMethod.getInvokeStatic(sootMethod.getDeclaringClass());
    trampolines.add(invokestatic);

    Variable handle = fn.newVariable(I64);
    fn.add(new Ptrtoint(handle, destPtr, I64));

    List<Value> args = new ArrayList<>();
    args.add(env);
    args.add(object);
    args.add(handle.ref());
    args.add(new IntegerConstant(flags));
    args.addAll(arrayDimensionsValues(dimensions));

    call(fn, invokestatic.getFunctionRef(), args);
  }
 protected Value createStackCopy(Function fn, Value value) {
   Variable stackCopy = fn.newVariable(new PointerType(value.getType()));
   fn.add(new Alloca(stackCopy, value.getType()));
   fn.add(new Store(value, stackCopy.ref()));
   return stackCopy.ref();
 }
 protected Value marshalPointerToLong(Function fn, Value pointer) {
   Variable result = fn.newVariable(I64);
   fn.add(new Ptrtoint(result, pointer, I64));
   return result.ref();
 }
  protected Value loadValueForGetter(
      SootMethod method,
      Function fn,
      Type memberType,
      Value memberPtr,
      Value env,
      boolean dereference,
      long flags) {

    soot.Type type = method.getReturnType();

    Value result = null;
    if (memberType instanceof StructureType) {
      // The member is a child struct contained in the current struct
      result = memberPtr;
    } else if (memberType instanceof ArrayType) {
      // The member is an array contained in the current struct
      result = memberPtr;
    } else if (dereference) {
      Variable tmp = fn.newVariable(memberType);
      fn.add(new Load(tmp, memberPtr));
      result = tmp.ref();
    } else {
      // Do not dereference the pointer but use it as is. This is needed for
      // global values such as _dispatch_main_q which is a struct and not a
      // pointer which we should load. We want the address of the struct.
      Variable tmp = fn.newVariable(memberType);
      fn.add(new Bitcast(tmp, memberPtr, tmp.getType()));
      result = tmp.ref();
    }

    if (needsMarshaler(type)) {
      MarshalerMethod marshalerMethod =
          config.getMarshalerLookup().findMarshalerMethod(new MarshalSite(method));
      String targetClassName = getInternalName(type);

      if (memberType instanceof PrimitiveType) {
        // Value type wrapping a primitive value (e.g. Enum, Integer and Bits)
        result =
            marshalNativeToValueObject(fn, marshalerMethod, env, targetClassName, result, flags);
      } else {
        if (memberType instanceof ArrayType) {
          // Array
          result =
              marshalNativeToArray(
                  fn,
                  marshalerMethod,
                  env,
                  targetClassName,
                  result,
                  flags,
                  getArrayDimensions(method));
        } else {
          result =
              marshalNativeToObject(fn, marshalerMethod, null, env, targetClassName, result, flags);
        }
      }
    } else {
      result = marshalNativeToPrimitive(fn, method, result);
    }
    return result;
  }
 protected Value marshalLongToPointer(Function fn, Value handle) {
   Variable result = fn.newVariable(I8_PTR);
   fn.add(new Inttoptr(result, handle, I8_PTR));
   return result.ref();
 }