| /* |
| * Copyright (C) 2012 The Android Open Source Project |
| * |
| * Licensed under the Apache License, Version 2.0 (the "License"); |
| * you may not use this file except in compliance with the License. |
| * You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, software |
| * distributed under the License is distributed on an "AS IS" BASIS, |
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| * See the License for the specific language governing permissions and |
| * limitations under the License. |
| */ |
| |
| #include "runtime_support.h" |
| |
| #include "class_linker-inl.h" |
| #include "dex_file-inl.h" |
| #include "gc/card_table-inl.h" |
| #include "mirror/abstract_method-inl.h" |
| #include "mirror/class-inl.h" |
| #include "mirror/field-inl.h" |
| #include "mirror/object-inl.h" |
| #include "mirror/object_array-inl.h" |
| #include "mirror/proxy.h" |
| #include "reflection.h" |
| #include "scoped_thread_state_change.h" |
| #include "ScopedLocalRef.h" |
| #include "well_known_classes.h" |
| |
| double art_l2d(int64_t l) { |
| return static_cast<double>(l); |
| } |
| |
| float art_l2f(int64_t l) { |
| return static_cast<float>(l); |
| } |
| |
| /* |
| * Float/double conversion requires clamping to min and max of integer form. If |
| * target doesn't support this normally, use these. |
| */ |
| int64_t art_d2l(double d) { |
| static const double kMaxLong = static_cast<double>(static_cast<int64_t>(0x7fffffffffffffffULL)); |
| static const double kMinLong = static_cast<double>(static_cast<int64_t>(0x8000000000000000ULL)); |
| if (d >= kMaxLong) { |
| return static_cast<int64_t>(0x7fffffffffffffffULL); |
| } else if (d <= kMinLong) { |
| return static_cast<int64_t>(0x8000000000000000ULL); |
| } else if (d != d) { // NaN case |
| return 0; |
| } else { |
| return static_cast<int64_t>(d); |
| } |
| } |
| |
| int64_t art_f2l(float f) { |
| static const float kMaxLong = static_cast<float>(static_cast<int64_t>(0x7fffffffffffffffULL)); |
| static const float kMinLong = static_cast<float>(static_cast<int64_t>(0x8000000000000000ULL)); |
| if (f >= kMaxLong) { |
| return static_cast<int64_t>(0x7fffffffffffffffULL); |
| } else if (f <= kMinLong) { |
| return static_cast<int64_t>(0x8000000000000000ULL); |
| } else if (f != f) { // NaN case |
| return 0; |
| } else { |
| return static_cast<int64_t>(f); |
| } |
| } |
| |
| int32_t art_d2i(double d) { |
| static const double kMaxInt = static_cast<double>(static_cast<int32_t>(0x7fffffffUL)); |
| static const double kMinInt = static_cast<double>(static_cast<int32_t>(0x80000000UL)); |
| if (d >= kMaxInt) { |
| return static_cast<int32_t>(0x7fffffffUL); |
| } else if (d <= kMinInt) { |
| return static_cast<int32_t>(0x80000000UL); |
| } else if (d != d) { // NaN case |
| return 0; |
| } else { |
| return static_cast<int32_t>(d); |
| } |
| } |
| |
| int32_t art_f2i(float f) { |
| static const float kMaxInt = static_cast<float>(static_cast<int32_t>(0x7fffffffUL)); |
| static const float kMinInt = static_cast<float>(static_cast<int32_t>(0x80000000UL)); |
| if (f >= kMaxInt) { |
| return static_cast<int32_t>(0x7fffffffUL); |
| } else if (f <= kMinInt) { |
| return static_cast<int32_t>(0x80000000UL); |
| } else if (f != f) { // NaN case |
| return 0; |
| } else { |
| return static_cast<int32_t>(f); |
| } |
| } |
| |
| namespace art { |
| |
| // Helper function to allocate array for FILLED_NEW_ARRAY. |
| mirror::Array* CheckAndAllocArrayFromCode(uint32_t type_idx, mirror::AbstractMethod* referrer, |
| int32_t component_count, Thread* self, |
| bool access_check) { |
| if (UNLIKELY(component_count < 0)) { |
| ThrowNegativeArraySizeException(component_count); |
| return NULL; // Failure |
| } |
| mirror::Class* klass = referrer->GetDexCacheResolvedTypes()->Get(type_idx); |
| if (UNLIKELY(klass == NULL)) { // Not in dex cache so try to resolve |
| klass = Runtime::Current()->GetClassLinker()->ResolveType(type_idx, referrer); |
| if (klass == NULL) { // Error |
| DCHECK(self->IsExceptionPending()); |
| return NULL; // Failure |
| } |
| } |
| if (UNLIKELY(klass->IsPrimitive() && !klass->IsPrimitiveInt())) { |
| if (klass->IsPrimitiveLong() || klass->IsPrimitiveDouble()) { |
| ThrowRuntimeException("Bad filled array request for type %s", |
| PrettyDescriptor(klass).c_str()); |
| } else { |
| ThrowLocation throw_location = self->GetCurrentLocationForThrow(); |
| DCHECK(throw_location.GetMethod() == referrer); |
| self->ThrowNewExceptionF(throw_location, "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) { |
| mirror::Class* referrer_klass = referrer->GetDeclaringClass(); |
| if (UNLIKELY(!referrer_klass->CanAccess(klass))) { |
| ThrowIllegalAccessErrorClass(referrer_klass, klass); |
| return NULL; // Failure |
| } |
| } |
| DCHECK(klass->IsArrayClass()) << PrettyClass(klass); |
| return mirror::Array::Alloc(self, klass, component_count); |
| } |
| } |
| |
| mirror::Field* FindFieldFromCode(uint32_t field_idx, const mirror::AbstractMethod* referrer, |
| Thread* self, FindFieldType type, size_t expected_size) { |
| bool is_primitive; |
| bool is_set; |
| bool is_static; |
| switch (type) { |
| case InstanceObjectRead: is_primitive = false; is_set = false; is_static = false; break; |
| case InstanceObjectWrite: is_primitive = false; is_set = true; is_static = false; break; |
| case InstancePrimitiveRead: is_primitive = true; is_set = false; is_static = false; break; |
| case InstancePrimitiveWrite: is_primitive = true; is_set = true; is_static = false; break; |
| case StaticObjectRead: is_primitive = false; is_set = false; is_static = true; break; |
| case StaticObjectWrite: is_primitive = false; is_set = true; is_static = true; break; |
| case StaticPrimitiveRead: is_primitive = true; is_set = false; is_static = true; break; |
| case StaticPrimitiveWrite: // Keep GCC happy by having a default handler, fall-through. |
| default: is_primitive = true; is_set = true; is_static = true; break; |
| } |
| ClassLinker* class_linker = Runtime::Current()->GetClassLinker(); |
| mirror::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 { |
| if (UNLIKELY(resolved_field->IsStatic() != is_static)) { |
| ThrowIncompatibleClassChangeErrorField(resolved_field, is_static, referrer); |
| return NULL; |
| } |
| mirror::Class* fields_class = resolved_field->GetDeclaringClass(); |
| mirror::Class* referring_class = referrer->GetDeclaringClass(); |
| if (UNLIKELY(!referring_class->CanAccess(fields_class) || |
| !referring_class->CanAccessMember(fields_class, |
| resolved_field->GetAccessFlags()))) { |
| // The referring class can't access the resolved field, this may occur as a result of a |
| // protected field being made public by a sub-class. Resort to the dex file to determine |
| // the correct class for the access check. |
| const DexFile& dex_file = *referring_class->GetDexCache()->GetDexFile(); |
| fields_class = class_linker->ResolveType(dex_file, |
| dex_file.GetFieldId(field_idx).class_idx_, |
| referring_class); |
| if (UNLIKELY(!referring_class->CanAccess(fields_class))) { |
| ThrowIllegalAccessErrorClass(referring_class, fields_class); |
| return NULL; // failure |
| } else if (UNLIKELY(!referring_class->CanAccessMember(fields_class, |
| resolved_field->GetAccessFlags()))) { |
| ThrowIllegalAccessErrorField(referring_class, resolved_field); |
| return NULL; // failure |
| } |
| } |
| if (UNLIKELY(is_set && resolved_field->IsFinal() && (fields_class != referring_class))) { |
| ThrowIllegalAccessErrorFinalField(referrer, resolved_field); |
| return NULL; // failure |
| } else { |
| FieldHelper fh(resolved_field); |
| if (UNLIKELY(fh.IsPrimitiveType() != is_primitive || |
| fh.FieldSize() != expected_size)) { |
| ThrowLocation throw_location = self->GetCurrentLocationForThrow(); |
| DCHECK(throw_location.GetMethod() == referrer); |
| self->ThrowNewExceptionF(throw_location, "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 initialized we're done. |
| if (fields_class->IsInitialized()) { |
| return resolved_field; |
| } else if (Runtime::Current()->GetClassLinker()->EnsureInitialized(fields_class, true, true)) { |
| // Otherwise let's ensure the class is initialized before resolving the field. |
| return resolved_field; |
| } else { |
| DCHECK(self->IsExceptionPending()); // Throw exception and unwind |
| return NULL; // failure |
| } |
| } |
| } |
| } |
| } |
| |
| // Slow path method resolution |
| mirror::AbstractMethod* FindMethodFromCode(uint32_t method_idx, mirror::Object* this_object, |
| mirror::AbstractMethod* referrer, |
| Thread* self, bool access_check, InvokeType type) { |
| ClassLinker* class_linker = Runtime::Current()->GetClassLinker(); |
| bool is_direct = type == kStatic || type == kDirect; |
| mirror::AbstractMethod* resolved_method = class_linker->ResolveMethod(method_idx, referrer, type); |
| if (UNLIKELY(resolved_method == NULL)) { |
| DCHECK(self->IsExceptionPending()); // Throw exception and unwind. |
| return NULL; // Failure. |
| } else if (UNLIKELY(this_object == NULL && type != kStatic)) { |
| // Maintain interpreter-like semantics where NullPointerException is thrown |
| // after potential NoSuchMethodError from class linker. |
| ThrowLocation throw_location = self->GetCurrentLocationForThrow(); |
| DCHECK(referrer == throw_location.GetMethod()); |
| ThrowNullPointerExceptionForMethodAccess(throw_location, method_idx, type); |
| return NULL; // Failure. |
| } else { |
| if (!access_check) { |
| if (is_direct) { |
| return resolved_method; |
| } else if (type == kInterface) { |
| mirror::AbstractMethod* interface_method = |
| this_object->GetClass()->FindVirtualMethodForInterface(resolved_method); |
| if (UNLIKELY(interface_method == NULL)) { |
| ThrowIncompatibleClassChangeErrorClassForInterfaceDispatch(resolved_method, this_object, |
| referrer); |
| return NULL; // Failure. |
| } else { |
| return interface_method; |
| } |
| } else { |
| mirror::ObjectArray<mirror::AbstractMethod>* 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 { |
| // Incompatible class change should have been handled in resolve method. |
| if (UNLIKELY(resolved_method->CheckIncompatibleClassChange(type))) { |
| ThrowIncompatibleClassChangeError(type, resolved_method->GetInvokeType(), resolved_method, |
| referrer); |
| return NULL; // Failure. |
| } |
| mirror::Class* methods_class = resolved_method->GetDeclaringClass(); |
| mirror::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 = *referring_class->GetDexCache()->GetDexFile(); |
| methods_class = class_linker->ResolveType(dex_file, |
| dex_file.GetMethodId(method_idx).class_idx_, |
| referring_class); |
| if (UNLIKELY(!referring_class->CanAccess(methods_class))) { |
| ThrowIllegalAccessErrorClassForMethodDispatch(referring_class, methods_class, |
| referrer, resolved_method, type); |
| return NULL; // Failure. |
| } else if (UNLIKELY(!referring_class->CanAccessMember(methods_class, |
| resolved_method->GetAccessFlags()))) { |
| ThrowIllegalAccessErrorMethod(referring_class, resolved_method); |
| return NULL; // Failure. |
| } |
| } |
| if (is_direct) { |
| return resolved_method; |
| } else if (type == kInterface) { |
| mirror::AbstractMethod* interface_method = |
| this_object->GetClass()->FindVirtualMethodForInterface(resolved_method); |
| if (UNLIKELY(interface_method == NULL)) { |
| ThrowIncompatibleClassChangeErrorClassForInterfaceDispatch(resolved_method, this_object, |
| referrer); |
| return NULL; // Failure. |
| } else { |
| return interface_method; |
| } |
| } else { |
| mirror::ObjectArray<mirror::AbstractMethod>* vtable; |
| uint16_t vtable_index = resolved_method->GetMethodIndex(); |
| if (type == kSuper) { |
| mirror::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. |
| MethodHelper mh(resolved_method); |
| ThrowNoSuchMethodError(type, resolved_method->GetDeclaringClass(), mh.GetName(), |
| mh.GetSignature()); |
| return NULL; // Failure. |
| } |
| } |
| } |
| } |
| } |
| |
| mirror::Class* ResolveVerifyAndClinit(uint32_t type_idx, const mirror::AbstractMethod* referrer, |
| Thread* self, bool can_run_clinit, bool verify_access) { |
| ClassLinker* class_linker = Runtime::Current()->GetClassLinker(); |
| mirror::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. |
| mirror::Class* referring_class = referrer->GetDeclaringClass(); |
| if (verify_access && UNLIKELY(!referring_class->CanAccess(klass))) { |
| ThrowIllegalAccessErrorClass(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, true)) { |
| CHECK(self->IsExceptionPending()); |
| return NULL; // Failure - Indicate to caller to deliver exception |
| } |
| referrer->GetDexCacheInitializedStaticStorage()->Set(type_idx, klass); |
| return klass; |
| } |
| |
| void ThrowStackOverflowError(Thread* self) { |
| CHECK(!self->IsHandlingStackOverflow()) << "Recursive stack overflow."; |
| |
| if (Runtime::Current()->GetInstrumentation()->AreExitStubsInstalled()) { |
| // Remove extra entry pushed onto second stack during method tracing. |
| Runtime::Current()->GetInstrumentation()->PopMethodForUnwind(self, false); |
| } |
| |
| self->SetStackEndForStackOverflow(); // Allow space on the stack for constructor to execute. |
| JNIEnvExt* env = self->GetJniEnv(); |
| std::string msg("stack size "); |
| msg += PrettySize(self->GetStackSize()); |
| // Use low-level JNI routine and pre-baked error class to avoid class linking operations that |
| // would consume more stack. |
| int rc = ::art::ThrowNewException(env, WellKnownClasses::java_lang_StackOverflowError, |
| msg.c_str(), NULL); |
| if (rc != JNI_OK) { |
| // TODO: ThrowNewException failed presumably because of an OOME, we continue to throw the OOME |
| // or die in the CHECK below. We may want to throw a pre-baked StackOverflowError |
| // instead. |
| LOG(ERROR) << "Couldn't throw new StackOverflowError because JNI ThrowNew failed."; |
| CHECK(self->IsExceptionPending()); |
| } |
| self->ResetDefaultStackEnd(); // Return to default stack size. |
| } |
| |
| JValue InvokeProxyInvocationHandler(ScopedObjectAccessUnchecked& soa, const char* shorty, |
| jobject rcvr_jobj, jobject interface_method_jobj, |
| std::vector<jvalue>& args) { |
| DCHECK(soa.Env()->IsInstanceOf(rcvr_jobj, WellKnownClasses::java_lang_reflect_Proxy)); |
| |
| // Build argument array possibly triggering GC. |
| soa.Self()->AssertThreadSuspensionIsAllowable(); |
| jobjectArray args_jobj = NULL; |
| const JValue zero; |
| if (args.size() > 0) { |
| args_jobj = soa.Env()->NewObjectArray(args.size(), WellKnownClasses::java_lang_Object, NULL); |
| if (args_jobj == NULL) { |
| CHECK(soa.Self()->IsExceptionPending()); |
| return zero; |
| } |
| for (size_t i = 0; i < args.size(); ++i) { |
| if (shorty[i + 1] == 'L') { |
| jobject val = args.at(i).l; |
| soa.Env()->SetObjectArrayElement(args_jobj, i, val); |
| } else { |
| JValue jv; |
| jv.SetJ(args.at(i).j); |
| mirror::Object* val = BoxPrimitive(Primitive::GetType(shorty[i + 1]), jv); |
| if (val == NULL) { |
| CHECK(soa.Self()->IsExceptionPending()); |
| return zero; |
| } |
| soa.Decode<mirror::ObjectArray<mirror::Object>* >(args_jobj)->Set(i, val); |
| } |
| } |
| } |
| |
| // Call InvocationHandler.invoke(Object proxy, Method method, Object[] args). |
| jobject inv_hand = soa.Env()->GetObjectField(rcvr_jobj, |
| WellKnownClasses::java_lang_reflect_Proxy_h); |
| jvalue invocation_args[3]; |
| invocation_args[0].l = rcvr_jobj; |
| invocation_args[1].l = interface_method_jobj; |
| invocation_args[2].l = args_jobj; |
| jobject result = |
| soa.Env()->CallObjectMethodA(inv_hand, |
| WellKnownClasses::java_lang_reflect_InvocationHandler_invoke, |
| invocation_args); |
| |
| // Unbox result and handle error conditions. |
| if (LIKELY(!soa.Self()->IsExceptionPending())) { |
| if (shorty[0] == 'V' || (shorty[0] == 'L' && result == NULL)) { |
| // Do nothing. |
| return zero; |
| } else { |
| mirror::Object* result_ref = soa.Decode<mirror::Object*>(result); |
| mirror::Object* rcvr = soa.Decode<mirror::Object*>(rcvr_jobj); |
| mirror::AbstractMethod* interface_method = |
| soa.Decode<mirror::AbstractMethod*>(interface_method_jobj); |
| mirror::Class* result_type = MethodHelper(interface_method).GetReturnType(); |
| mirror::AbstractMethod* proxy_method; |
| if (interface_method->GetDeclaringClass()->IsInterface()) { |
| proxy_method = rcvr->GetClass()->FindVirtualMethodForInterface(interface_method); |
| } else { |
| // Proxy dispatch to a method defined in Object. |
| DCHECK(interface_method->GetDeclaringClass()->IsObjectClass()); |
| proxy_method = interface_method; |
| } |
| ThrowLocation throw_location(rcvr, proxy_method, -1); |
| JValue result_unboxed; |
| if (!UnboxPrimitiveForResult(throw_location, result_ref, result_type, result_unboxed)) { |
| DCHECK(soa.Self()->IsExceptionPending()); |
| return zero; |
| } |
| return result_unboxed; |
| } |
| } else { |
| // In the case of checked exceptions that aren't declared, the exception must be wrapped by |
| // a UndeclaredThrowableException. |
| mirror::Throwable* exception = soa.Self()->GetException(NULL); |
| if (exception->IsCheckedException()) { |
| mirror::Object* rcvr = soa.Decode<mirror::Object*>(rcvr_jobj); |
| mirror::SynthesizedProxyClass* proxy_class = |
| down_cast<mirror::SynthesizedProxyClass*>(rcvr->GetClass()); |
| mirror::AbstractMethod* interface_method = |
| soa.Decode<mirror::AbstractMethod*>(interface_method_jobj); |
| mirror::AbstractMethod* proxy_method = |
| rcvr->GetClass()->FindVirtualMethodForInterface(interface_method); |
| int throws_index = -1; |
| size_t num_virt_methods = proxy_class->NumVirtualMethods(); |
| for (size_t i = 0; i < num_virt_methods; i++) { |
| if (proxy_class->GetVirtualMethod(i) == proxy_method) { |
| throws_index = i; |
| break; |
| } |
| } |
| CHECK_NE(throws_index, -1); |
| mirror::ObjectArray<mirror::Class>* declared_exceptions = proxy_class->GetThrows()->Get(throws_index); |
| mirror::Class* exception_class = exception->GetClass(); |
| bool declares_exception = false; |
| for (int i = 0; i < declared_exceptions->GetLength() && !declares_exception; i++) { |
| mirror::Class* declared_exception = declared_exceptions->Get(i); |
| declares_exception = declared_exception->IsAssignableFrom(exception_class); |
| } |
| if (!declares_exception) { |
| ThrowLocation throw_location(rcvr, proxy_method, -1); |
| soa.Self()->ThrowNewWrappedException(throw_location, |
| "Ljava/lang/reflect/UndeclaredThrowableException;", |
| NULL); |
| } |
| } |
| return zero; |
| } |
| } |
| |
| } // namespace art |
