static Type mergeStructMemberTypes(DataLayout dataLayout, Type t1, Type t2) {
int align1 = dataLayout.getAlignment(t1);
int align2 = dataLayout.getAlignment(t2);
int size1 = dataLayout.getStoreSize(t1);
int size2 = dataLayout.getStoreSize(t2);
Type result = align1 < align2 ? t2 : t1;
int size = align1 < align2 ? size2 : size1;
int pad = Math.max(size1, size2) - size;
if (pad > 0) {
return new StructureType(result, new ArrayType(pad, I8));
} else {
return result;
}
}
private StructureType getStructType(SootClass clazz, boolean checkEmpty) {
int n = 0;
for (SootMethod method : clazz.getMethods()) {
n = Math.max(getStructMemberOffset(method) + 1, n);
}
Type[] result = new Type[n + 1];
StructureType superType = null;
if (clazz.hasSuperclass()) {
SootClass superclass = clazz.getSuperclass();
if (!superclass.getName().equals("org.robovm.rt.bro.Struct")) {
superType = getStructType(superclass, false);
}
}
result[0] = superType != null ? superType : new StructureType();
for (SootMethod method : clazz.getMethods()) {
int offset = getStructMemberOffset(method);
if (offset != -1) {
if (!method.isNative() && !method.isStatic()) {
throw new IllegalArgumentException(
"@StructMember annotated method " + method + " must be native and not static");
}
Type type = null;
if (method.getParameterCount() == 0) {
soot.Type sootType = method.getReturnType();
// Possibly a getter
if (hasPointerAnnotation(method) && !sootType.equals(LongType.v())) {
throw new IllegalArgumentException(
"@StructMember("
+ offset
+ ") annotated getter "
+ method
+ " must be of type long when annotated with @Pointer");
}
if (hasMachineSizedFloatAnnotation(method)
&& !sootType.equals(DoubleType.v())
&& !sootType.equals(FloatType.v())) {
throw new IllegalArgumentException(
"@StructMember("
+ offset
+ ") annotated getter "
+ method
+ " must be of type float or double when annotated with @MachineSizedFloat");
}
if ((hasMachineSizedSIntAnnotation(method) || hasMachineSizedUIntAnnotation(method))
&& !sootType.equals(LongType.v())) {
throw new IllegalArgumentException(
"@StructMember("
+ offset
+ ") annotated getter "
+ method
+ " must be of type long when annotated with @MachineSizedSInt or @MachineSizedUInt");
}
if (sootType instanceof soot.ArrayType && !hasArrayAnnotation(method)) {
throw new IllegalArgumentException(
"@Array annotation expected on struct member getter " + method);
}
} else if (method.getParameterCount() == 1) {
soot.Type sootType = method.getParameterType(0);
if (hasPointerAnnotation(method, 0) && !sootType.equals(LongType.v())) {
throw new IllegalArgumentException(
"@StructMember("
+ offset
+ ") annotated setter "
+ method
+ " must be of type long when annotated with @Pointer");
}
if (hasMachineSizedFloatAnnotation(method, 0)
&& !sootType.equals(DoubleType.v())
&& !sootType.equals(FloatType.v())) {
throw new IllegalArgumentException(
"@StructMember("
+ offset
+ ") annotated setter "
+ method
+ " must be of type float or double when annotated with @MachineSizedFloat");
}
if ((hasMachineSizedSIntAnnotation(method, 0) || hasMachineSizedUIntAnnotation(method))
&& !sootType.equals(LongType.v())) {
throw new IllegalArgumentException(
"@StructMember("
+ offset
+ ") annotated setter "
+ method
+ " must be of type long when annotated with @MachineSizedSInt or @MachineSizedUInt");
}
if (sootType instanceof soot.ArrayType && !hasArrayAnnotation(method, 0)) {
throw new IllegalArgumentException(
"@Array annotation expected on first parameter of struct member setter " + method);
}
soot.Type retType = method.getReturnType();
// The return type of the setter must be void or this
if (!retType.equals(VoidType.v())
&& !(retType instanceof RefType
&& ((RefType) retType).getSootClass().equals(clazz))) {
throw new IllegalArgumentException(
"Setter "
+ method
+ " for "
+ "@StructMember("
+ offset
+ ") "
+ " must either return nothing or return a "
+ clazz);
}
} else {
throw new IllegalArgumentException(
"@StructMember annotated method " + method + " has too many parameters");
}
type = getStructMemberType(method);
int index = offset + 1;
if (result[index] == null) {
result[index] = type;
} else if (type != result[index]) {
// Two members mapped to the same offset (union). Pick
// the type with the largest alignment and pad with bytes
// up to the largest size.
result[index] = mergeStructMemberTypes(config.getDataLayout(), type, result[index]);
}
}
}
for (int i = 1; i < result.length; i++) {
if (result[i] == null) {
throw new IllegalArgumentException("No @StructMember(" + i + ") defined in class " + clazz);
}
}
if (!clazz.isAbstract() && checkEmpty && n == 0 && superType == null) {
throw new IllegalArgumentException(
"Struct class " + clazz + " has no @StructMember annotated methods");
}
return new StructureType(result);
}
