| /* |
| * 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 "art_field-inl.h" |
| #include "art_method-inl.h" |
| #include "base/mutex.h" |
| #include "class_linker-inl.h" |
| #include "dex_file-inl.h" |
| #include "gc/accounting/card_table-inl.h" |
| #include "mirror/class-inl.h" |
| #include "mirror/method.h" |
| #include "mirror/object-inl.h" |
| #include "mirror/object_array-inl.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, |
| int32_t component_count, |
| ArtMethod* referrer, |
| 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->GetDexCacheResolvedType<false>(type_idx); |
| if (UNLIKELY(klass == nullptr)) { // Not in dex cache so try to resolve |
| klass = Runtime::Current()->GetClassLinker()->ResolveType(type_idx, referrer); |
| if (klass == nullptr) { // 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 { |
| self->ThrowNewExceptionF( |
| "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, int32_t component_count, |
| ArtMethod* referrer, Thread* self, |
| bool access_check, |
| gc::AllocatorType /* allocator_type */) { |
| mirror::Class* klass = CheckFilledNewArrayAlloc(type_idx, component_count, referrer, 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->GetComponentSizeShift(), |
| heap->GetCurrentAllocator()); |
| } |
| |
| // Helper function to allocate array for FILLED_NEW_ARRAY. |
| mirror::Array* CheckAndAllocArrayFromCodeInstrumented(uint32_t type_idx, |
| int32_t component_count, |
| ArtMethod* referrer, |
| Thread* self, |
| bool access_check, |
| gc::AllocatorType /* allocator_type */) { |
| mirror::Class* klass = CheckFilledNewArrayAlloc(type_idx, component_count, referrer, 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->GetComponentSizeShift(), |
| 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. |
| } |
| |
| self->SetStackEndForStackOverflow(); // Allow space on the stack for constructor to execute. |
| JNIEnvExt* env = self->GetJniEnv(); |
| std::string msg("stack size "); |
| msg += PrettySize(self->GetStackSize()); |
| |
| // Avoid running Java code for exception initialization. |
| // TODO: Checks to make this a bit less brittle. |
| |
| std::string error_msg; |
| |
| // Allocate an uninitialized object. |
| ScopedLocalRef<jobject> exc(env, |
| env->AllocObject(WellKnownClasses::java_lang_StackOverflowError)); |
| if (exc.get() != nullptr) { |
| // "Initialize". |
| // StackOverflowError -> VirtualMachineError -> Error -> Throwable -> Object. |
| // Only Throwable has "custom" fields: |
| // String detailMessage. |
| // Throwable cause (= this). |
| // List<Throwable> suppressedExceptions (= Collections.emptyList()). |
| // Object stackState; |
| // StackTraceElement[] stackTrace; |
| // Only Throwable has a non-empty constructor: |
| // this.stackTrace = EmptyArray.STACK_TRACE_ELEMENT; |
| // fillInStackTrace(); |
| |
| // detailMessage. |
| // TODO: Use String::FromModifiedUTF...? |
| ScopedLocalRef<jstring> s(env, env->NewStringUTF(msg.c_str())); |
| if (s.get() != nullptr) { |
| env->SetObjectField(exc.get(), WellKnownClasses::java_lang_Throwable_detailMessage, s.get()); |
| |
| // cause. |
| env->SetObjectField(exc.get(), WellKnownClasses::java_lang_Throwable_cause, exc.get()); |
| |
| // suppressedExceptions. |
| ScopedLocalRef<jobject> emptylist(env, env->GetStaticObjectField( |
| WellKnownClasses::java_util_Collections, |
| WellKnownClasses::java_util_Collections_EMPTY_LIST)); |
| CHECK(emptylist.get() != nullptr); |
| env->SetObjectField(exc.get(), |
| WellKnownClasses::java_lang_Throwable_suppressedExceptions, |
| emptylist.get()); |
| |
| // stackState is set as result of fillInStackTrace. fillInStackTrace calls |
| // nativeFillInStackTrace. |
| ScopedLocalRef<jobject> stack_state_val(env, nullptr); |
| { |
| ScopedObjectAccessUnchecked soa(env); |
| stack_state_val.reset(soa.Self()->CreateInternalStackTrace<false>(soa)); |
| } |
| if (stack_state_val.get() != nullptr) { |
| env->SetObjectField(exc.get(), |
| WellKnownClasses::java_lang_Throwable_stackState, |
| stack_state_val.get()); |
| |
| // stackTrace. |
| ScopedLocalRef<jobject> stack_trace_elem(env, env->GetStaticObjectField( |
| WellKnownClasses::libcore_util_EmptyArray, |
| WellKnownClasses::libcore_util_EmptyArray_STACK_TRACE_ELEMENT)); |
| env->SetObjectField(exc.get(), |
| WellKnownClasses::java_lang_Throwable_stackTrace, |
| stack_trace_elem.get()); |
| } else { |
| error_msg = "Could not create stack trace."; |
| } |
| // Throw the exception. |
| self->SetException(reinterpret_cast<mirror::Throwable*>(self->DecodeJObject(exc.get()))); |
| } else { |
| // Could not allocate a string object. |
| error_msg = "Couldn't throw new StackOverflowError because JNI NewStringUTF failed."; |
| } |
| } else { |
| error_msg = "Could not allocate StackOverflowError object."; |
| } |
| |
| if (!error_msg.empty()) { |
| LOG(WARNING) << error_msg; |
| CHECK(self->IsExceptionPending()); |
| } |
| |
| bool explicit_overflow_check = Runtime::Current()->ExplicitStackOverflowChecks(); |
| self->ResetDefaultStackEnd(); // Return to default stack size. |
| |
| // And restore protection if implicit checks are on. |
| if (!explicit_overflow_check) { |
| self->ProtectStack(); |
| } |
| } |
| |
| void CheckReferenceResult(mirror::Object* o, Thread* self) { |
| if (o == nullptr) { |
| return; |
| } |
| // Make sure that the result is an instance of the type this method was expected to return. |
| mirror::Class* return_type = self->GetCurrentMethod(nullptr)->GetReturnType(); |
| |
| if (!o->InstanceOf(return_type)) { |
| Runtime::Current()->GetJavaVM()->JniAbortF(nullptr, |
| "attempt to return an instance of %s from %s", |
| PrettyTypeOf(o).c_str(), |
| PrettyMethod(self->GetCurrentMethod(nullptr)).c_str()); |
| } |
| } |
| |
| 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 = nullptr; |
| 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, nullptr); |
| if (args_jobj == nullptr) { |
| 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 == nullptr) { |
| CHECK(soa.Self()->IsExceptionPending()); |
| return zero; |
| } |
| soa.Decode<mirror::ObjectArray<mirror::Object>* >(args_jobj)->Set<false>(i, val); |
| } |
| } |
| } |
| |
| // Call Proxy.invoke(Proxy proxy, Method 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 == nullptr)) { |
| // Do nothing. |
| return zero; |
| } else { |
| StackHandleScope<1> hs(soa.Self()); |
| auto h_interface_method(hs.NewHandle(soa.Decode<mirror::Method*>(interface_method_jobj))); |
| // This can cause thread suspension. |
| mirror::Class* result_type = h_interface_method->GetArtMethod()->GetReturnType(); |
| mirror::Object* result_ref = soa.Decode<mirror::Object*>(result); |
| JValue result_unboxed; |
| if (!UnboxPrimitiveForResult(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(); |
| if (exception->IsCheckedException()) { |
| mirror::Object* rcvr = soa.Decode<mirror::Object*>(rcvr_jobj); |
| mirror::Class* proxy_class = rcvr->GetClass(); |
| mirror::Method* interface_method = soa.Decode<mirror::Method*>(interface_method_jobj); |
| ArtMethod* proxy_method = rcvr->GetClass()->FindVirtualMethodForInterface( |
| interface_method->GetArtMethod(), sizeof(void*)); |
| auto* virtual_methods = proxy_class->GetVirtualMethodsPtr(); |
| size_t num_virtuals = proxy_class->NumVirtualMethods(); |
| size_t method_size = ArtMethod::ObjectSize(sizeof(void*)); |
| int throws_index = (reinterpret_cast<uintptr_t>(proxy_method) - |
| reinterpret_cast<uintptr_t>(virtual_methods)) / method_size; |
| CHECK_LT(throws_index, static_cast<int>(num_virtuals)); |
| mirror::ObjectArray<mirror::Class>* declared_exceptions = |
| proxy_class->GetThrows()->Get(throws_index); |
| mirror::Class* exception_class = exception->GetClass(); |
| bool declares_exception = false; |
| for (int32_t 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) { |
| soa.Self()->ThrowNewWrappedException("Ljava/lang/reflect/UndeclaredThrowableException;", |
| nullptr); |
| } |
| } |
| return zero; |
| } |
| } |
| |
| bool FillArrayData(mirror::Object* obj, const Instruction::ArrayDataPayload* payload) { |
| DCHECK_EQ(payload->ident, static_cast<uint16_t>(Instruction::kArrayDataSignature)); |
| if (UNLIKELY(obj == nullptr)) { |
| ThrowNullPointerException("null array in FILL_ARRAY_DATA"); |
| return false; |
| } |
| mirror::Array* array = obj->AsArray(); |
| DCHECK(!array->IsObjectArray()); |
| if (UNLIKELY(static_cast<int32_t>(payload->element_count) > array->GetLength())) { |
| Thread* self = Thread::Current(); |
| self->ThrowNewExceptionF("Ljava/lang/ArrayIndexOutOfBoundsException;", |
| "failed FILL_ARRAY_DATA; length=%d, index=%d", |
| array->GetLength(), payload->element_count); |
| return false; |
| } |
| // Copy data from dex file to memory assuming both are little endian. |
| uint32_t size_in_bytes = payload->element_count * payload->element_width; |
| memcpy(array->GetRawData(payload->element_width, 0), payload->data, size_in_bytes); |
| return true; |
| } |
| |
| } // namespace art |
