| /* |
| * 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 "entrypoints/entrypoint_utils.h" |
| |
| #include "class_linker-inl.h" |
| #include "dex_file-inl.h" |
| #include "gc/accounting/card_table-inl.h" |
| #include "mirror/art_field-inl.h" |
| #include "mirror/art_method-inl.h" |
| #include "mirror/class-inl.h" |
| #include "mirror/object-inl.h" |
| #include "object_utils.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" |
| |
| namespace art { |
| |
| static inline mirror::Class* CheckFilledNewArrayAlloc(uint32_t type_idx, mirror::ArtMethod* referrer, |
| int32_t component_count, Thread* self, |
| bool access_check) |
| SHARED_LOCKS_REQUIRED(Locks::mutator_lock_) { |
| if (UNLIKELY(component_count < 0)) { |
| ThrowNegativeArraySizeException(component_count); |
| return nullptr; // Failure |
| } |
| mirror::Class* klass = referrer->GetDexCacheResolvedTypes()->GetWithoutChecks(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 nullptr; // 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 nullptr; // Failure |
| } |
| if (access_check) { |
| mirror::Class* referrer_klass = referrer->GetDeclaringClass(); |
| if (UNLIKELY(!referrer_klass->CanAccess(klass))) { |
| ThrowIllegalAccessErrorClass(referrer_klass, klass); |
| return nullptr; // Failure |
| } |
| } |
| DCHECK(klass->IsArrayClass()) << PrettyClass(klass); |
| return klass; |
| } |
| |
| // Helper function to allocate array for FILLED_NEW_ARRAY. |
| mirror::Array* CheckAndAllocArrayFromCode(uint32_t type_idx, mirror::ArtMethod* referrer, |
| int32_t component_count, Thread* self, |
| bool access_check, |
| gc::AllocatorType /* allocator_type */) { |
| mirror::Class* klass = CheckFilledNewArrayAlloc(type_idx, referrer, component_count, self, |
| access_check); |
| if (UNLIKELY(klass == nullptr)) { |
| return nullptr; |
| } |
| // Always go slow path for now, filled new array is not common. |
| gc::Heap* heap = Runtime::Current()->GetHeap(); |
| // Use the current allocator type in case CheckFilledNewArrayAlloc caused us to suspend and then |
| // the heap switched the allocator type while we were suspended. |
| return mirror::Array::Alloc<false>(self, klass, component_count, klass->GetComponentSize(), |
| heap->GetCurrentAllocator()); |
| } |
| |
| // Helper function to allocate array for FILLED_NEW_ARRAY. |
| mirror::Array* CheckAndAllocArrayFromCodeInstrumented(uint32_t type_idx, mirror::ArtMethod* referrer, |
| int32_t component_count, Thread* self, |
| bool access_check, |
| gc::AllocatorType /* allocator_type */) { |
| mirror::Class* klass = CheckFilledNewArrayAlloc(type_idx, referrer, component_count, self, |
| access_check); |
| if (UNLIKELY(klass == nullptr)) { |
| return nullptr; |
| } |
| gc::Heap* heap = Runtime::Current()->GetHeap(); |
| // Use the current allocator type in case CheckFilledNewArrayAlloc caused us to suspend and then |
| // the heap switched the allocator type while we were suspended. |
| return mirror::Array::Alloc<true>(self, klass, component_count, klass->GetComponentSize(), |
| heap->GetCurrentAllocator()); |
| } |
| |
| void ThrowStackOverflowError(Thread* self) { |
| if (self->IsHandlingStackOverflow()) { |
| LOG(ERROR) << "Recursive stack overflow."; |
| // We don't fail here because SetStackEndForStackOverflow will print better diagnostics. |
| } |
| |
| 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()); |
| } |
| |
| bool explicit_overflow_check = Runtime::Current()->ExplicitStackOverflowChecks(); |
| self->ResetDefaultStackEnd(!explicit_overflow_check); // Return to default stack size. |
| } |
| |
| JValue InvokeProxyInvocationHandler(ScopedObjectAccessAlreadyRunnable& 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; |
| int32_t target_sdk_version = Runtime::Current()->GetTargetSdkVersion(); |
| // Do not create empty arrays unless needed to maintain Dalvik bug compatibility. |
| if (args.size() > 0 || (target_sdk_version > 0 && target_sdk_version <= 21)) { |
| 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<false>(i, val); |
| } |
| } |
| } |
| |
| // Call Proxy.invoke(Proxy proxy, ArtMethod method, Object[] args). |
| 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()->CallStaticObjectMethodA(WellKnownClasses::java_lang_reflect_Proxy, |
| WellKnownClasses::java_lang_reflect_Proxy_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::ArtMethod* interface_method = |
| soa.Decode<mirror::ArtMethod*>(interface_method_jobj); |
| mirror::Class* result_type = MethodHelper(interface_method).GetReturnType(); |
| mirror::ArtMethod* 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::ArtMethod* interface_method = |
| soa.Decode<mirror::ArtMethod*>(interface_method_jobj); |
| mirror::ArtMethod* 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 |
