blob: 71567a343eb4570af769fef44a31383319119409 [file] [log] [blame]
// Copyright 2012 Google Inc. All Rights Reserved.
#include "runtime_support_common.h"
namespace art {
// Helper function to allocate array for FILLED_NEW_ARRAY.
Array* CheckAndAllocArrayFromCode(uint32_t type_idx, Method* method, int32_t component_count,
Thread* self, bool access_check) {
if (UNLIKELY(component_count < 0)) {
self->ThrowNewExceptionF("Ljava/lang/NegativeArraySizeException;", "%d", component_count);
return NULL; // Failure
}
Class* klass = method->GetDexCacheResolvedTypes()->Get(type_idx);
if (UNLIKELY(klass == NULL)) { // Not in dex cache so try to resolve
klass = Runtime::Current()->GetClassLinker()->ResolveType(type_idx, method);
if (klass == NULL) { // Error
DCHECK(Thread::Current()->IsExceptionPending());
return NULL; // Failure
}
}
if (UNLIKELY(klass->IsPrimitive() && !klass->IsPrimitiveInt())) {
if (klass->IsPrimitiveLong() || klass->IsPrimitiveDouble()) {
Thread::Current()->ThrowNewExceptionF("Ljava/lang/RuntimeException;",
"Bad filled array request for type %s",
PrettyDescriptor(klass).c_str());
} else {
Thread::Current()->ThrowNewExceptionF("Ljava/lang/InternalError;",
"Found type %s; filled-new-array not implemented for anything but \'int\'",
PrettyDescriptor(klass).c_str());
}
return NULL; // Failure
} else {
if (access_check) {
Class* referrer = method->GetDeclaringClass();
if (UNLIKELY(!referrer->CanAccess(klass))) {
ThrowNewIllegalAccessErrorClass(self, referrer, klass);
return NULL; // Failure
}
}
DCHECK(klass->IsArrayClass()) << PrettyClass(klass);
return Array::Alloc(klass, component_count);
}
}
// Slow path field resolution and declaring class initialization
Field* FindFieldFromCode(uint32_t field_idx, const Method* referrer, Thread* self,
bool is_static, bool is_primitive, bool is_set, size_t expected_size) {
ClassLinker* class_linker = Runtime::Current()->GetClassLinker();
Field* resolved_field = class_linker->ResolveField(field_idx, referrer, is_static);
if (UNLIKELY(resolved_field == NULL)) {
DCHECK(self->IsExceptionPending()); // Throw exception and unwind
return NULL; // failure
} else {
Class* fields_class = resolved_field->GetDeclaringClass();
Class* referring_class = referrer->GetDeclaringClass();
if (UNLIKELY(!referring_class->CanAccess(fields_class))) {
ThrowNewIllegalAccessErrorClass(self, referring_class, fields_class);
return NULL; // failure
} else if (UNLIKELY(!referring_class->CanAccessMember(fields_class,
resolved_field->GetAccessFlags()))) {
ThrowNewIllegalAccessErrorField(self, referring_class, resolved_field);
return NULL; // failure
} else if (UNLIKELY(is_set && resolved_field->IsFinal() && (fields_class != referring_class))) {
ThrowNewIllegalAccessErrorFinalField(self, referrer, resolved_field);
return NULL; // failure
} else {
FieldHelper fh(resolved_field);
if (UNLIKELY(fh.IsPrimitiveType() != is_primitive ||
fh.FieldSize() != expected_size)) {
self->ThrowNewExceptionF("Ljava/lang/NoSuchFieldError;",
"Attempted read of %zd-bit %s on field '%s'",
expected_size * (32 / sizeof(int32_t)),
is_primitive ? "primitive" : "non-primitive",
PrettyField(resolved_field, true).c_str());
return NULL; // failure
} else if (!is_static) {
// instance fields must be being accessed on an initialized class
return resolved_field;
} else {
// If the class is already initializing, we must be inside <clinit>, or
// we'd still be waiting for the lock.
if (fields_class->IsInitializing()) {
return resolved_field;
} else if (Runtime::Current()->GetClassLinker()->EnsureInitialized(fields_class, true)) {
return resolved_field;
} else {
DCHECK(self->IsExceptionPending()); // Throw exception and unwind
return NULL; // failure
}
}
}
}
}
// Slow path method resolution
Method* FindMethodFromCode(uint32_t method_idx, Object* this_object, const Method* referrer,
Thread* self, bool access_check, InvokeType type) {
ClassLinker* class_linker = Runtime::Current()->GetClassLinker();
bool is_direct = type == kStatic || type == kDirect;
Method* resolved_method = class_linker->ResolveMethod(method_idx, referrer, is_direct);
if (UNLIKELY(resolved_method == NULL)) {
DCHECK(self->IsExceptionPending()); // Throw exception and unwind
return NULL; // failure
} else {
if (!access_check) {
if (is_direct) {
return resolved_method;
} else if (type == kInterface) {
Method* interface_method =
this_object->GetClass()->FindVirtualMethodForInterface(resolved_method);
if (UNLIKELY(interface_method == NULL)) {
ThrowNewIncompatibleClassChangeErrorClassForInterfaceDispatch(self, referrer,
resolved_method,
this_object);
return NULL; // failure
} else {
return interface_method;
}
} else {
ObjectArray<Method>* vtable;
uint16_t vtable_index = resolved_method->GetMethodIndex();
if (type == kSuper) {
vtable = referrer->GetDeclaringClass()->GetSuperClass()->GetVTable();
} else {
vtable = this_object->GetClass()->GetVTable();
}
// TODO: eliminate bounds check?
return vtable->Get(vtable_index);
}
} else {
Class* methods_class = resolved_method->GetDeclaringClass();
Class* referring_class = referrer->GetDeclaringClass();
if (UNLIKELY(!referring_class->CanAccess(methods_class) ||
!referring_class->CanAccessMember(methods_class,
resolved_method->GetAccessFlags()))) {
// The referring class can't access the resolved method, this may occur as a result of a
// protected method being made public by implementing an interface that re-declares the
// method public. Resort to the dex file to determine the correct class for the access check
const DexFile& dex_file = class_linker->FindDexFile(referring_class->GetDexCache());
methods_class = class_linker->ResolveType(dex_file,
dex_file.GetMethodId(method_idx).class_idx_,
referring_class);
if (UNLIKELY(!referring_class->CanAccess(methods_class))) {
ThrowNewIllegalAccessErrorClassForMethodDispatch(self, referring_class, methods_class,
referrer, resolved_method, type);
return NULL; // failure
} else if (UNLIKELY(!referring_class->CanAccessMember(methods_class,
resolved_method->GetAccessFlags()))) {
ThrowNewIllegalAccessErrorMethod(self, referring_class, resolved_method);
return NULL; // failure
}
}
if (is_direct) {
return resolved_method;
} else if (type == kInterface) {
Method* interface_method =
this_object->GetClass()->FindVirtualMethodForInterface(resolved_method);
if (UNLIKELY(interface_method == NULL)) {
ThrowNewIncompatibleClassChangeErrorClassForInterfaceDispatch(self, referrer,
resolved_method,
this_object);
return NULL; // failure
} else {
return interface_method;
}
} else {
ObjectArray<Method>* vtable;
uint16_t vtable_index = resolved_method->GetMethodIndex();
if (type == kSuper) {
Class* super_class = referring_class->GetSuperClass();
if (LIKELY(super_class != NULL)) {
vtable = referring_class->GetSuperClass()->GetVTable();
} else {
vtable = NULL;
}
} else {
vtable = this_object->GetClass()->GetVTable();
}
if (LIKELY(vtable != NULL &&
vtable_index < static_cast<uint32_t>(vtable->GetLength()))) {
return vtable->GetWithoutChecks(vtable_index);
} else {
// Behavior to agree with that of the verifier
self->ThrowNewExceptionF("Ljava/lang/NoSuchMethodError;",
"attempt to invoke %s method '%s' from '%s'"
" using incorrect form of method dispatch",
(type == kSuper ? "super class" : "virtual"),
PrettyMethod(resolved_method).c_str(),
PrettyMethod(referrer).c_str());
return NULL; // failure
}
}
}
}
}
Class* ResolveVerifyAndClinit(uint32_t type_idx, const Method* referrer, Thread* self,
bool can_run_clinit, bool verify_access) {
ClassLinker* class_linker = Runtime::Current()->GetClassLinker();
Class* klass = class_linker->ResolveType(type_idx, referrer);
if (UNLIKELY(klass == NULL)) {
CHECK(self->IsExceptionPending());
return NULL; // Failure - Indicate to caller to deliver exception
}
// Perform access check if necessary.
Class* referring_class = referrer->GetDeclaringClass();
if (verify_access && UNLIKELY(!referring_class->CanAccess(klass))) {
ThrowNewIllegalAccessErrorClass(self, referring_class, klass);
return NULL; // Failure - Indicate to caller to deliver exception
}
// If we're just implementing const-class, we shouldn't call <clinit>.
if (!can_run_clinit) {
return klass;
}
// If we are the <clinit> of this class, just return our storage.
//
// Do not set the DexCache InitializedStaticStorage, since that implies <clinit> has finished
// running.
if (klass == referring_class && MethodHelper(referrer).IsClassInitializer()) {
return klass;
}
if (!class_linker->EnsureInitialized(klass, true)) {
CHECK(self->IsExceptionPending());
return NULL; // Failure - Indicate to caller to deliver exception
}
referrer->GetDexCacheInitializedStaticStorage()->Set(type_idx, klass);
return klass;
}
} // namespace art