| /* | |
| * Copyright (C) 2011 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 "reflection-inl.h" | |
| #include "art_field-inl.h" | |
| #include "art_method-alloc-inl.h" | |
| #include "base/pointer_size.h" | |
| #include "class_linker.h" | |
| #include "common_throws.h" | |
| #include "dex/dex_file-inl.h" | |
| #include "indirect_reference_table-inl.h" | |
| #include "jni/java_vm_ext.h" | |
| #include "jni/jni_internal.h" | |
| #include "jvalue-inl.h" | |
| #include "mirror/class-inl.h" | |
| #include "mirror/executable.h" | |
| #include "mirror/object_array-inl.h" | |
| #include "nativehelper/scoped_local_ref.h" | |
| #include "nth_caller_visitor.h" | |
| #include "scoped_thread_state_change-inl.h" | |
| #include "stack_reference.h" | |
| #include "thread-inl.h" | |
| #include "well_known_classes-inl.h" | |
| namespace art HIDDEN { | |
| namespace { | |
| using android::base::StringPrintf; | |
| class ArgArray { | |
| public: | |
| ArgArray(const char* shorty, uint32_t shorty_len) | |
| : shorty_(shorty), shorty_len_(shorty_len), num_bytes_(0) { | |
| size_t num_slots = shorty_len + 1; // +1 in case of receiver. | |
| if (LIKELY((num_slots * 2) < kSmallArgArraySize)) { | |
| // We can trivially use the small arg array. | |
| arg_array_ = small_arg_array_; | |
| } else { | |
| // Analyze shorty to see if we need the large arg array. | |
| for (size_t i = 1; i < shorty_len; ++i) { | |
| char c = shorty[i]; | |
| if (c == 'J' || c == 'D') { | |
| num_slots++; | |
| } | |
| } | |
| if (num_slots <= kSmallArgArraySize) { | |
| arg_array_ = small_arg_array_; | |
| } else { | |
| large_arg_array_.reset(new uint32_t[num_slots]); | |
| arg_array_ = large_arg_array_.get(); | |
| } | |
| } | |
| } | |
| uint32_t* GetArray() { | |
| return arg_array_; | |
| } | |
| uint32_t GetNumBytes() { | |
| return num_bytes_; | |
| } | |
| void Append(uint32_t value) { | |
| arg_array_[num_bytes_ / 4] = value; | |
| num_bytes_ += 4; | |
| } | |
| void Append(ObjPtr<mirror::Object> obj) REQUIRES_SHARED(Locks::mutator_lock_) { | |
| Append(StackReference<mirror::Object>::FromMirrorPtr(obj.Ptr()).AsVRegValue()); | |
| } | |
| void AppendWide(uint64_t value) { | |
| arg_array_[num_bytes_ / 4] = value; | |
| arg_array_[(num_bytes_ / 4) + 1] = value >> 32; | |
| num_bytes_ += 8; | |
| } | |
| void AppendFloat(float value) { | |
| jvalue jv; | |
| jv.f = value; | |
| Append(jv.i); | |
| } | |
| void AppendDouble(double value) { | |
| jvalue jv; | |
| jv.d = value; | |
| AppendWide(jv.j); | |
| } | |
| void BuildArgArrayFromVarArgs(const ScopedObjectAccessAlreadyRunnable& soa, | |
| ObjPtr<mirror::Object> receiver, | |
| va_list ap) | |
| REQUIRES_SHARED(Locks::mutator_lock_) { | |
| // Set receiver if non-null (method is not static) | |
| if (receiver != nullptr) { | |
| Append(receiver); | |
| } | |
| for (size_t i = 1; i < shorty_len_; ++i) { | |
| switch (shorty_[i]) { | |
| case 'Z': | |
| case 'B': | |
| case 'C': | |
| case 'S': | |
| case 'I': | |
| Append(va_arg(ap, jint)); | |
| break; | |
| case 'F': | |
| AppendFloat(va_arg(ap, jdouble)); | |
| break; | |
| case 'L': | |
| Append(soa.Decode<mirror::Object>(va_arg(ap, jobject))); | |
| break; | |
| case 'D': | |
| AppendDouble(va_arg(ap, jdouble)); | |
| break; | |
| case 'J': | |
| AppendWide(va_arg(ap, jlong)); | |
| break; | |
| #ifndef NDEBUG | |
| default: | |
| LOG(FATAL) << "Unexpected shorty character: " << shorty_[i]; | |
| #endif | |
| } | |
| } | |
| } | |
| void BuildArgArrayFromJValues(const ScopedObjectAccessAlreadyRunnable& soa, | |
| ObjPtr<mirror::Object> receiver, const jvalue* args) | |
| REQUIRES_SHARED(Locks::mutator_lock_) { | |
| // Set receiver if non-null (method is not static) | |
| if (receiver != nullptr) { | |
| Append(receiver); | |
| } | |
| for (size_t i = 1, args_offset = 0; i < shorty_len_; ++i, ++args_offset) { | |
| switch (shorty_[i]) { | |
| case 'Z': | |
| Append(args[args_offset].z); | |
| break; | |
| case 'B': | |
| Append(args[args_offset].b); | |
| break; | |
| case 'C': | |
| Append(args[args_offset].c); | |
| break; | |
| case 'S': | |
| Append(args[args_offset].s); | |
| break; | |
| case 'I': | |
| FALLTHROUGH_INTENDED; | |
| case 'F': | |
| Append(args[args_offset].i); | |
| break; | |
| case 'L': | |
| Append(soa.Decode<mirror::Object>(args[args_offset].l)); | |
| break; | |
| case 'D': | |
| FALLTHROUGH_INTENDED; | |
| case 'J': | |
| AppendWide(args[args_offset].j); | |
| break; | |
| #ifndef NDEBUG | |
| default: | |
| LOG(FATAL) << "Unexpected shorty character: " << shorty_[i]; | |
| #endif | |
| } | |
| } | |
| } | |
| void BuildArgArrayFromFrame(ShadowFrame* shadow_frame, uint32_t arg_offset) | |
| REQUIRES_SHARED(Locks::mutator_lock_) { | |
| // Set receiver if non-null (method is not static) | |
| size_t cur_arg = arg_offset; | |
| if (!shadow_frame->GetMethod()->IsStatic()) { | |
| Append(shadow_frame->GetVReg(cur_arg)); | |
| cur_arg++; | |
| } | |
| for (size_t i = 1; i < shorty_len_; ++i) { | |
| switch (shorty_[i]) { | |
| case 'Z': | |
| case 'B': | |
| case 'C': | |
| case 'S': | |
| case 'I': | |
| case 'F': | |
| case 'L': | |
| Append(shadow_frame->GetVReg(cur_arg)); | |
| cur_arg++; | |
| break; | |
| case 'D': | |
| case 'J': | |
| AppendWide(shadow_frame->GetVRegLong(cur_arg)); | |
| cur_arg++; | |
| cur_arg++; | |
| break; | |
| #ifndef NDEBUG | |
| default: | |
| LOG(FATAL) << "Unexpected shorty character: " << shorty_[i]; | |
| #endif | |
| } | |
| } | |
| } | |
| static void ThrowIllegalPrimitiveArgumentException(const char* expected, | |
| const char* found_descriptor) | |
| REQUIRES_SHARED(Locks::mutator_lock_) { | |
| ThrowIllegalArgumentException( | |
| StringPrintf("Invalid primitive conversion from %s to %s", expected, | |
| PrettyDescriptor(found_descriptor).c_str()).c_str()); | |
| } | |
| bool BuildArgArrayFromObjectArray(ObjPtr<mirror::Object> receiver, | |
| ObjPtr<mirror::ObjectArray<mirror::Object>> raw_args, | |
| ArtMethod* m, | |
| Thread* self) | |
| REQUIRES_SHARED(Locks::mutator_lock_) { | |
| const dex::TypeList* classes = m->GetParameterTypeList(); | |
| // Set receiver if non-null (method is not static) | |
| if (receiver != nullptr) { | |
| Append(receiver); | |
| } | |
| StackHandleScope<2> hs(self); | |
| MutableHandle<mirror::Object> arg(hs.NewHandle<mirror::Object>(nullptr)); | |
| Handle<mirror::ObjectArray<mirror::Object>> args( | |
| hs.NewHandle<mirror::ObjectArray<mirror::Object>>(raw_args)); | |
| for (size_t i = 1, args_offset = 0; i < shorty_len_; ++i, ++args_offset) { | |
| arg.Assign(args->Get(args_offset)); | |
| if (((shorty_[i] == 'L') && (arg != nullptr)) || | |
| ((arg == nullptr && shorty_[i] != 'L'))) { | |
| // TODO: The method's parameter's type must have been previously resolved, yet | |
| // we've seen cases where it's not b/34440020. | |
| ObjPtr<mirror::Class> dst_class( | |
| m->ResolveClassFromTypeIndex(classes->GetTypeItem(args_offset).type_idx_)); | |
| if (dst_class == nullptr) { | |
| CHECK(self->IsExceptionPending()); | |
| return false; | |
| } | |
| if (UNLIKELY(arg == nullptr || !arg->InstanceOf(dst_class))) { | |
| ThrowIllegalArgumentException( | |
| StringPrintf("method %s argument %zd has type %s, got %s", | |
| m->PrettyMethod(false).c_str(), | |
| args_offset + 1, // Humans don't count from 0. | |
| mirror::Class::PrettyDescriptor(dst_class).c_str(), | |
| mirror::Object::PrettyTypeOf(arg.Get()).c_str()).c_str()); | |
| return false; | |
| } | |
| } | |
| #define DO_FIRST_ARG(boxed, get_fn, append) { \ | |
| if (LIKELY(arg != nullptr && \ | |
| arg->GetClass() == WellKnownClasses::java_lang_##boxed)) { \ | |
| ArtField* primitive_field = WellKnownClasses::java_lang_##boxed##_value; \ | |
| append(primitive_field-> get_fn(arg.Get())); | |
| #define DO_ARG(boxed, get_fn, append) \ | |
| } else if (LIKELY(arg != nullptr && \ | |
| arg->GetClass() == WellKnownClasses::java_lang_##boxed)) { \ | |
| ArtField* primitive_field = WellKnownClasses::java_lang_##boxed##_value; \ | |
| append(primitive_field-> get_fn(arg.Get())); | |
| #define DO_FAIL(expected) \ | |
| } else { \ | |
| if (arg->GetClass<>()->IsPrimitive()) { \ | |
| std::string temp; \ | |
| ThrowIllegalPrimitiveArgumentException(expected, \ | |
| arg->GetClass<>()->GetDescriptor(&temp)); \ | |
| } else { \ | |
| ThrowIllegalArgumentException(\ | |
| StringPrintf("method %s argument %zd has type %s, got %s", \ | |
| ArtMethod::PrettyMethod(m, false).c_str(), \ | |
| args_offset + 1, \ | |
| expected, \ | |
| mirror::Object::PrettyTypeOf(arg.Get()).c_str()).c_str()); \ | |
| } \ | |
| return false; \ | |
| } } | |
| switch (shorty_[i]) { | |
| case 'L': | |
| Append(arg.Get()); | |
| break; | |
| case 'Z': | |
| DO_FIRST_ARG(Boolean, GetBoolean, Append) | |
| DO_FAIL("boolean") | |
| break; | |
| case 'B': | |
| DO_FIRST_ARG(Byte, GetByte, Append) | |
| DO_FAIL("byte") | |
| break; | |
| case 'C': | |
| DO_FIRST_ARG(Character, GetChar, Append) | |
| DO_FAIL("char") | |
| break; | |
| case 'S': | |
| DO_FIRST_ARG(Short, GetShort, Append) | |
| DO_ARG(Byte, GetByte, Append) | |
| DO_FAIL("short") | |
| break; | |
| case 'I': | |
| DO_FIRST_ARG(Integer, GetInt, Append) | |
| DO_ARG(Character, GetChar, Append) | |
| DO_ARG(Short, GetShort, Append) | |
| DO_ARG(Byte, GetByte, Append) | |
| DO_FAIL("int") | |
| break; | |
| case 'J': | |
| DO_FIRST_ARG(Long, GetLong, AppendWide) | |
| DO_ARG(Integer, GetInt, AppendWide) | |
| DO_ARG(Character, GetChar, AppendWide) | |
| DO_ARG(Short, GetShort, AppendWide) | |
| DO_ARG(Byte, GetByte, AppendWide) | |
| DO_FAIL("long") | |
| break; | |
| case 'F': | |
| DO_FIRST_ARG(Float, GetFloat, AppendFloat) | |
| DO_ARG(Long, GetLong, AppendFloat) | |
| DO_ARG(Integer, GetInt, AppendFloat) | |
| DO_ARG(Character, GetChar, AppendFloat) | |
| DO_ARG(Short, GetShort, AppendFloat) | |
| DO_ARG(Byte, GetByte, AppendFloat) | |
| DO_FAIL("float") | |
| break; | |
| case 'D': | |
| DO_FIRST_ARG(Double, GetDouble, AppendDouble) | |
| DO_ARG(Float, GetFloat, AppendDouble) | |
| DO_ARG(Long, GetLong, AppendDouble) | |
| DO_ARG(Integer, GetInt, AppendDouble) | |
| DO_ARG(Character, GetChar, AppendDouble) | |
| DO_ARG(Short, GetShort, AppendDouble) | |
| DO_ARG(Byte, GetByte, AppendDouble) | |
| DO_FAIL("double") | |
| break; | |
| #ifndef NDEBUG | |
| default: | |
| LOG(FATAL) << "Unexpected shorty character: " << shorty_[i]; | |
| UNREACHABLE(); | |
| #endif | |
| } | |
| #undef DO_FIRST_ARG | |
| #undef DO_ARG | |
| #undef DO_FAIL | |
| } | |
| return true; | |
| } | |
| private: | |
| enum { kSmallArgArraySize = 16 }; | |
| const char* const shorty_; | |
| const uint32_t shorty_len_; | |
| uint32_t num_bytes_; | |
| uint32_t* arg_array_; | |
| uint32_t small_arg_array_[kSmallArgArraySize]; | |
| std::unique_ptr<uint32_t[]> large_arg_array_; | |
| }; | |
| void CheckMethodArguments(JavaVMExt* vm, ArtMethod* m, uint32_t* args) | |
| REQUIRES_SHARED(Locks::mutator_lock_) { | |
| const dex::TypeList* params = m->GetParameterTypeList(); | |
| if (params == nullptr) { | |
| return; // No arguments so nothing to check. | |
| } | |
| uint32_t offset = 0; | |
| uint32_t num_params = params->Size(); | |
| size_t error_count = 0; | |
| if (!m->IsStatic()) { | |
| offset = 1; | |
| } | |
| // TODO: If args contain object references, it may cause problems. | |
| Thread* const self = Thread::Current(); | |
| for (uint32_t i = 0; i < num_params; i++) { | |
| dex::TypeIndex type_idx = params->GetTypeItem(i).type_idx_; | |
| ObjPtr<mirror::Class> param_type(m->ResolveClassFromTypeIndex(type_idx)); | |
| if (param_type == nullptr) { | |
| CHECK(self->IsExceptionPending()); | |
| LOG(ERROR) << "Internal error: unresolvable type for argument type in JNI invoke: " | |
| << m->GetTypeDescriptorFromTypeIdx(type_idx) << "\n" | |
| << self->GetException()->Dump(); | |
| self->ClearException(); | |
| ++error_count; | |
| } else if (!param_type->IsPrimitive()) { | |
| // TODO: There is a compaction bug here since GetClassFromTypeIdx can cause thread suspension, | |
| // this is a hard to fix problem since the args can contain Object*, we need to save and | |
| // restore them by using a visitor similar to the ones used in the trampoline entrypoints. | |
| ObjPtr<mirror::Object> argument = | |
| (reinterpret_cast<StackReference<mirror::Object>*>(&args[i + offset]))->AsMirrorPtr(); | |
| if (argument != nullptr && !argument->InstanceOf(param_type)) { | |
| LOG(ERROR) << "JNI ERROR (app bug): attempt to pass an instance of " | |
| << argument->PrettyTypeOf() << " as argument " << (i + 1) | |
| << " to " << m->PrettyMethod(); | |
| ++error_count; | |
| } | |
| } else if (param_type->IsPrimitiveLong() || param_type->IsPrimitiveDouble()) { | |
| offset++; | |
| } else { | |
| int32_t arg = static_cast<int32_t>(args[i + offset]); | |
| if (param_type->IsPrimitiveBoolean()) { | |
| if (arg != JNI_TRUE && arg != JNI_FALSE) { | |
| LOG(ERROR) << "JNI ERROR (app bug): expected jboolean (0/1) but got value of " | |
| << arg << " as argument " << (i + 1) << " to " << m->PrettyMethod(); | |
| ++error_count; | |
| } | |
| } else if (param_type->IsPrimitiveByte()) { | |
| if (arg < -128 || arg > 127) { | |
| LOG(ERROR) << "JNI ERROR (app bug): expected jbyte but got value of " | |
| << arg << " as argument " << (i + 1) << " to " << m->PrettyMethod(); | |
| ++error_count; | |
| } | |
| } else if (param_type->IsPrimitiveChar()) { | |
| if (args[i + offset] > 0xFFFF) { | |
| LOG(ERROR) << "JNI ERROR (app bug): expected jchar but got value of " | |
| << arg << " as argument " << (i + 1) << " to " << m->PrettyMethod(); | |
| ++error_count; | |
| } | |
| } else if (param_type->IsPrimitiveShort()) { | |
| if (arg < -32768 || arg > 0x7FFF) { | |
| LOG(ERROR) << "JNI ERROR (app bug): expected jshort but got value of " | |
| << arg << " as argument " << (i + 1) << " to " << m->PrettyMethod(); | |
| ++error_count; | |
| } | |
| } | |
| } | |
| } | |
| if (UNLIKELY(error_count > 0)) { | |
| // TODO: pass the JNI function name (such as "CallVoidMethodV") through so we can call JniAbort | |
| // with an argument. | |
| vm->JniAbortF(nullptr, "bad arguments passed to %s (see above for details)", | |
| m->PrettyMethod().c_str()); | |
| } | |
| } | |
| ArtMethod* FindVirtualMethod(ObjPtr<mirror::Object> receiver, ArtMethod* method) | |
| REQUIRES_SHARED(Locks::mutator_lock_) { | |
| return receiver->GetClass()->FindVirtualMethodForVirtualOrInterface(method, kRuntimePointerSize); | |
| } | |
| void InvokeWithArgArray(const ScopedObjectAccessAlreadyRunnable& soa, | |
| ArtMethod* method, ArgArray* arg_array, JValue* result, | |
| const char* shorty) | |
| REQUIRES_SHARED(Locks::mutator_lock_) { | |
| uint32_t* args = arg_array->GetArray(); | |
| if (UNLIKELY(soa.Env()->IsCheckJniEnabled())) { | |
| CheckMethodArguments(soa.Vm(), method->GetInterfaceMethodIfProxy(kRuntimePointerSize), args); | |
| } | |
| method->Invoke(soa.Self(), args, arg_array->GetNumBytes(), result, shorty); | |
| } | |
| ALWAYS_INLINE | |
| bool CheckArgsForInvokeMethod(ArtMethod* np_method, | |
| ObjPtr<mirror::ObjectArray<mirror::Object>> objects) | |
| REQUIRES_SHARED(Locks::mutator_lock_) { | |
| const dex::TypeList* classes = np_method->GetParameterTypeList(); | |
| uint32_t classes_size = (classes == nullptr) ? 0 : classes->Size(); | |
| uint32_t arg_count = (objects == nullptr) ? 0 : objects->GetLength(); | |
| if (UNLIKELY(arg_count != classes_size)) { | |
| ThrowIllegalArgumentException(StringPrintf("Wrong number of arguments; expected %d, got %d", | |
| classes_size, arg_count).c_str()); | |
| return false; | |
| } | |
| return true; | |
| } | |
| ALWAYS_INLINE | |
| bool InvokeMethodImpl(const ScopedObjectAccessAlreadyRunnable& soa, | |
| ArtMethod* m, | |
| ArtMethod* np_method, | |
| ObjPtr<mirror::Object> receiver, | |
| ObjPtr<mirror::ObjectArray<mirror::Object>> objects, | |
| const char** shorty, | |
| JValue* result) REQUIRES_SHARED(Locks::mutator_lock_) { | |
| // Invoke the method. | |
| uint32_t shorty_len = 0; | |
| *shorty = np_method->GetShorty(&shorty_len); | |
| ArgArray arg_array(*shorty, shorty_len); | |
| if (!arg_array.BuildArgArrayFromObjectArray(receiver, objects, np_method, soa.Self())) { | |
| CHECK(soa.Self()->IsExceptionPending()); | |
| return false; | |
| } | |
| InvokeWithArgArray(soa, m, &arg_array, result, *shorty); | |
| // Wrap any exception with "Ljava/lang/reflect/InvocationTargetException;" and return early. | |
| if (soa.Self()->IsExceptionPending()) { | |
| // To abort a transaction we use a fake exception that should never be caught by the bytecode | |
| // and therefore it makes no sense to wrap it. | |
| if (Runtime::Current()->IsActiveTransaction() && | |
| Runtime::Current()->GetClassLinker()->IsTransactionAborted()) { | |
| DCHECK(soa.Self()->GetException()->GetClass()->DescriptorEquals( | |
| "Ldalvik/system/TransactionAbortError;")) | |
| << soa.Self()->GetException()->GetClass()->PrettyDescriptor(); | |
| } else { | |
| // If we get another exception when we are trying to wrap, then just use that instead. | |
| StackHandleScope<2u> hs(soa.Self()); | |
| Handle<mirror::Throwable> cause = hs.NewHandle(soa.Self()->GetException()); | |
| soa.Self()->ClearException(); | |
| Handle<mirror::Object> exception_instance = | |
| WellKnownClasses::java_lang_reflect_InvocationTargetException_init->NewObject<'L'>( | |
| hs, soa.Self(), cause); | |
| if (exception_instance == nullptr) { | |
| soa.Self()->AssertPendingException(); | |
| return false; | |
| } | |
| soa.Self()->SetException(exception_instance->AsThrowable()); | |
| } | |
| return false; | |
| } | |
| return true; | |
| } | |
| } // anonymous namespace | |
| template <> | |
| NO_STACK_PROTECTOR | |
| JValue InvokeWithVarArgs(const ScopedObjectAccessAlreadyRunnable& soa, | |
| jobject obj, | |
| ArtMethod* method, | |
| va_list args) REQUIRES_SHARED(Locks::mutator_lock_) { | |
| // We want to make sure that the stack is not within a small distance from the | |
| // protected region in case we are calling into a leaf function whose stack | |
| // check has been elided. | |
| if (UNLIKELY(__builtin_frame_address(0) < soa.Self()->GetStackEnd<kNativeStackType>())) { | |
| ThrowStackOverflowError<kNativeStackType>(soa.Self()); | |
| return JValue(); | |
| } | |
| bool is_string_init = method->IsStringConstructor(); | |
| if (is_string_init) { | |
| // Replace calls to String.<init> with equivalent StringFactory call. | |
| method = WellKnownClasses::StringInitToStringFactory(method); | |
| } | |
| ObjPtr<mirror::Object> receiver = method->IsStatic() ? nullptr : soa.Decode<mirror::Object>(obj); | |
| uint32_t shorty_len = 0; | |
| const char* shorty = | |
| method->GetInterfaceMethodIfProxy(kRuntimePointerSize)->GetShorty(&shorty_len); | |
| JValue result; | |
| ArgArray arg_array(shorty, shorty_len); | |
| arg_array.BuildArgArrayFromVarArgs(soa, receiver, args); | |
| InvokeWithArgArray(soa, method, &arg_array, &result, shorty); | |
| if (is_string_init) { | |
| // For string init, remap original receiver to StringFactory result. | |
| UpdateReference(soa.Self(), obj, result.GetL()); | |
| } | |
| return result; | |
| } | |
| template <> | |
| NO_STACK_PROTECTOR | |
| JValue InvokeWithVarArgs(const ScopedObjectAccessAlreadyRunnable& soa, | |
| jobject obj, | |
| jmethodID mid, | |
| va_list args) REQUIRES_SHARED(Locks::mutator_lock_) { | |
| DCHECK(mid != nullptr) << "Called with null jmethodID"; | |
| return InvokeWithVarArgs(soa, obj, jni::DecodeArtMethod(mid), args); | |
| } | |
| template <> | |
| JValue InvokeWithJValues(const ScopedObjectAccessAlreadyRunnable& soa, | |
| jobject obj, | |
| ArtMethod* method, | |
| const jvalue* args) { | |
| // We want to make sure that the stack is not within a small distance from the | |
| // protected region in case we are calling into a leaf function whose stack | |
| // check has been elided. | |
| if (UNLIKELY(__builtin_frame_address(0) < soa.Self()->GetStackEnd<kNativeStackType>())) { | |
| ThrowStackOverflowError<kNativeStackType>(soa.Self()); | |
| return JValue(); | |
| } | |
| bool is_string_init = method->IsStringConstructor(); | |
| if (is_string_init) { | |
| // Replace calls to String.<init> with equivalent StringFactory call. | |
| method = WellKnownClasses::StringInitToStringFactory(method); | |
| } | |
| ObjPtr<mirror::Object> receiver = method->IsStatic() ? nullptr : soa.Decode<mirror::Object>(obj); | |
| uint32_t shorty_len = 0; | |
| const char* shorty = | |
| method->GetInterfaceMethodIfProxy(kRuntimePointerSize)->GetShorty(&shorty_len); | |
| JValue result; | |
| ArgArray arg_array(shorty, shorty_len); | |
| arg_array.BuildArgArrayFromJValues(soa, receiver, args); | |
| InvokeWithArgArray(soa, method, &arg_array, &result, shorty); | |
| if (is_string_init) { | |
| // For string init, remap original receiver to StringFactory result. | |
| UpdateReference(soa.Self(), obj, result.GetL()); | |
| } | |
| return result; | |
| } | |
| template <> | |
| JValue InvokeWithJValues(const ScopedObjectAccessAlreadyRunnable& soa, | |
| jobject obj, | |
| jmethodID mid, | |
| const jvalue* args) { | |
| DCHECK(mid != nullptr) << "Called with null jmethodID"; | |
| return InvokeWithJValues(soa, obj, jni::DecodeArtMethod(mid), args); | |
| } | |
| template <> | |
| JValue InvokeVirtualOrInterfaceWithJValues(const ScopedObjectAccessAlreadyRunnable& soa, | |
| jobject obj, | |
| ArtMethod* interface_method, | |
| const jvalue* args) { | |
| // We want to make sure that the stack is not within a small distance from the | |
| // protected region in case we are calling into a leaf function whose stack | |
| // check has been elided. | |
| if (UNLIKELY(__builtin_frame_address(0) < soa.Self()->GetStackEnd<kNativeStackType>())) { | |
| ThrowStackOverflowError<kNativeStackType>(soa.Self()); | |
| return JValue(); | |
| } | |
| ObjPtr<mirror::Object> receiver = soa.Decode<mirror::Object>(obj); | |
| ArtMethod* method = FindVirtualMethod(receiver, interface_method); | |
| bool is_string_init = method->IsStringConstructor(); | |
| if (is_string_init) { | |
| // Replace calls to String.<init> with equivalent StringFactory call. | |
| method = WellKnownClasses::StringInitToStringFactory(method); | |
| receiver = nullptr; | |
| } | |
| uint32_t shorty_len = 0; | |
| const char* shorty = | |
| method->GetInterfaceMethodIfProxy(kRuntimePointerSize)->GetShorty(&shorty_len); | |
| JValue result; | |
| ArgArray arg_array(shorty, shorty_len); | |
| arg_array.BuildArgArrayFromJValues(soa, receiver, args); | |
| InvokeWithArgArray(soa, method, &arg_array, &result, shorty); | |
| if (is_string_init) { | |
| // For string init, remap original receiver to StringFactory result. | |
| UpdateReference(soa.Self(), obj, result.GetL()); | |
| } | |
| return result; | |
| } | |
| template <> | |
| JValue InvokeVirtualOrInterfaceWithJValues(const ScopedObjectAccessAlreadyRunnable& soa, | |
| jobject obj, | |
| jmethodID mid, | |
| const jvalue* args) { | |
| DCHECK(mid != nullptr) << "Called with null jmethodID"; | |
| return InvokeVirtualOrInterfaceWithJValues(soa, obj, jni::DecodeArtMethod(mid), args); | |
| } | |
| template <> | |
| JValue InvokeVirtualOrInterfaceWithVarArgs(const ScopedObjectAccessAlreadyRunnable& soa, | |
| jobject obj, | |
| ArtMethod* interface_method, | |
| va_list args) { | |
| // We want to make sure that the stack is not within a small distance from the | |
| // protected region in case we are calling into a leaf function whose stack | |
| // check has been elided. | |
| if (UNLIKELY(__builtin_frame_address(0) < soa.Self()->GetStackEnd<kNativeStackType>())) { | |
| ThrowStackOverflowError<kNativeStackType>(soa.Self()); | |
| return JValue(); | |
| } | |
| ObjPtr<mirror::Object> receiver = soa.Decode<mirror::Object>(obj); | |
| ArtMethod* method = FindVirtualMethod(receiver, interface_method); | |
| bool is_string_init = method->IsStringConstructor(); | |
| if (is_string_init) { | |
| // Replace calls to String.<init> with equivalent StringFactory call. | |
| method = WellKnownClasses::StringInitToStringFactory(method); | |
| receiver = nullptr; | |
| } | |
| uint32_t shorty_len = 0; | |
| const char* shorty = | |
| method->GetInterfaceMethodIfProxy(kRuntimePointerSize)->GetShorty(&shorty_len); | |
| JValue result; | |
| ArgArray arg_array(shorty, shorty_len); | |
| arg_array.BuildArgArrayFromVarArgs(soa, receiver, args); | |
| InvokeWithArgArray(soa, method, &arg_array, &result, shorty); | |
| if (is_string_init) { | |
| // For string init, remap original receiver to StringFactory result. | |
| UpdateReference(soa.Self(), obj, result.GetL()); | |
| } | |
| return result; | |
| } | |
| template <> | |
| JValue InvokeVirtualOrInterfaceWithVarArgs(const ScopedObjectAccessAlreadyRunnable& soa, | |
| jobject obj, | |
| jmethodID mid, | |
| va_list args) { | |
| DCHECK(mid != nullptr) << "Called with null jmethodID"; | |
| return InvokeVirtualOrInterfaceWithVarArgs(soa, obj, jni::DecodeArtMethod(mid), args); | |
| } | |
| template <PointerSize kPointerSize> | |
| jobject InvokeMethod(const ScopedObjectAccessAlreadyRunnable& soa, jobject javaMethod, | |
| jobject javaReceiver, jobject javaArgs, size_t num_frames) { | |
| // We want to make sure that the stack is not within a small distance from the | |
| // protected region in case we are calling into a leaf function whose stack | |
| // check has been elided. | |
| if (UNLIKELY(__builtin_frame_address(0) < | |
| soa.Self()->GetStackEndForInterpreter(true))) { | |
| ThrowStackOverflowError<kNativeStackType>(soa.Self()); | |
| return nullptr; | |
| } | |
| ObjPtr<mirror::Executable> executable = soa.Decode<mirror::Executable>(javaMethod); | |
| const bool accessible = executable->IsAccessible(); | |
| ArtMethod* m = executable->GetArtMethod(); | |
| ObjPtr<mirror::Class> declaring_class = m->GetDeclaringClass(); | |
| if (UNLIKELY(!declaring_class->IsVisiblyInitialized())) { | |
| Thread* self = soa.Self(); | |
| StackHandleScope<1> hs(self); | |
| HandleWrapperObjPtr<mirror::Class> h_class(hs.NewHandleWrapper(&declaring_class)); | |
| if (UNLIKELY(!Runtime::Current()->GetClassLinker()->EnsureInitialized( | |
| self, h_class, /*can_init_fields=*/ true, /*can_init_parents=*/ true))) { | |
| DCHECK(self->IsExceptionPending()); | |
| return nullptr; | |
| } | |
| DCHECK(h_class->IsInitializing()); | |
| } | |
| ObjPtr<mirror::Object> receiver; | |
| if (!m->IsStatic()) { | |
| // Replace calls to String.<init> with equivalent StringFactory call. | |
| if (declaring_class->IsStringClass() && m->IsConstructor()) { | |
| m = WellKnownClasses::StringInitToStringFactory(m); | |
| CHECK(javaReceiver == nullptr); | |
| } else { | |
| // Check that the receiver is non-null and an instance of the field's declaring class. | |
| receiver = soa.Decode<mirror::Object>(javaReceiver); | |
| if (!VerifyObjectIsClass(receiver, declaring_class)) { | |
| return nullptr; | |
| } | |
| // Find the actual implementation of the virtual method. | |
| m = receiver->GetClass()->FindVirtualMethodForVirtualOrInterface(m, kPointerSize); | |
| } | |
| } | |
| // Get our arrays of arguments and their types, and check they're the same size. | |
| ObjPtr<mirror::ObjectArray<mirror::Object>> objects = | |
| soa.Decode<mirror::ObjectArray<mirror::Object>>(javaArgs); | |
| auto* np_method = m->GetInterfaceMethodIfProxy(kPointerSize); | |
| if (!CheckArgsForInvokeMethod(np_method, objects)) { | |
| return nullptr; | |
| } | |
| // If method is not set to be accessible, verify it can be accessed by the caller. | |
| ObjPtr<mirror::Class> calling_class; | |
| if (!accessible && !VerifyAccess(soa.Self(), | |
| receiver, | |
| declaring_class, | |
| m->GetAccessFlags(), | |
| &calling_class, | |
| num_frames)) { | |
| ThrowIllegalAccessException( | |
| StringPrintf("Class %s cannot access %s method %s of class %s", | |
| calling_class == nullptr ? "null" : calling_class->PrettyClass().c_str(), | |
| PrettyJavaAccessFlags(m->GetAccessFlags()).c_str(), | |
| m->PrettyMethod().c_str(), | |
| m->GetDeclaringClass() == nullptr ? "null" : | |
| m->GetDeclaringClass()->PrettyClass().c_str()).c_str()); | |
| return nullptr; | |
| } | |
| // Invoke the method. | |
| JValue result; | |
| const char* shorty; | |
| if (!InvokeMethodImpl(soa, m, np_method, receiver, objects, &shorty, &result)) { | |
| return nullptr; | |
| } | |
| return soa.AddLocalReference<jobject>(BoxPrimitive(Primitive::GetType(shorty[0]), result)); | |
| } | |
| template | |
| jobject InvokeMethod<PointerSize::k32>(const ScopedObjectAccessAlreadyRunnable& soa, | |
| jobject javaMethod, | |
| jobject javaReceiver, | |
| jobject javaArgs, | |
| size_t num_frames); | |
| template | |
| jobject InvokeMethod<PointerSize::k64>(const ScopedObjectAccessAlreadyRunnable& soa, | |
| jobject javaMethod, | |
| jobject javaReceiver, | |
| jobject javaArgs, | |
| size_t num_frames); | |
| void InvokeConstructor(const ScopedObjectAccessAlreadyRunnable& soa, | |
| ArtMethod* constructor, | |
| ObjPtr<mirror::Object> receiver, | |
| jobject javaArgs) { | |
| // We want to make sure that the stack is not within a small distance from the | |
| // protected region in case we are calling into a leaf function whose stack | |
| // check has been elided. | |
| if (UNLIKELY(__builtin_frame_address(0) < soa.Self()->GetStackEndForInterpreter(true))) { | |
| ThrowStackOverflowError<kNativeStackType>(soa.Self()); | |
| return; | |
| } | |
| if (kIsDebugBuild) { | |
| CHECK(constructor->IsConstructor()); | |
| ObjPtr<mirror::Class> declaring_class = constructor->GetDeclaringClass(); | |
| CHECK(declaring_class->IsInitializing()); | |
| // Calls to String.<init> should have been repplaced with with equivalent StringFactory calls. | |
| CHECK(!declaring_class->IsStringClass()); | |
| // Check that the receiver is non-null and an instance of the field's declaring class. | |
| CHECK(receiver != nullptr); | |
| CHECK(VerifyObjectIsClass(receiver, declaring_class)); | |
| CHECK_EQ(constructor, | |
| receiver->GetClass()->FindVirtualMethodForVirtualOrInterface(constructor, | |
| kRuntimePointerSize)); | |
| } | |
| // Get our arrays of arguments and their types, and check they're the same size. | |
| ObjPtr<mirror::ObjectArray<mirror::Object>> objects = | |
| soa.Decode<mirror::ObjectArray<mirror::Object>>(javaArgs); | |
| ArtMethod* np_method = constructor->GetInterfaceMethodIfProxy(kRuntimePointerSize); | |
| if (!CheckArgsForInvokeMethod(np_method, objects)) { | |
| return; | |
| } | |
| // Invoke the constructor. | |
| JValue result; | |
| const char* shorty; | |
| InvokeMethodImpl(soa, constructor, np_method, receiver, objects, &shorty, &result); | |
| } | |
| ObjPtr<mirror::Object> BoxPrimitive(Primitive::Type src_class, const JValue& value) { | |
| if (src_class == Primitive::kPrimNot) { | |
| return value.GetL(); | |
| } | |
| if (src_class == Primitive::kPrimVoid) { | |
| // There's no such thing as a void field, and void methods invoked via reflection return null. | |
| return nullptr; | |
| } | |
| ArtMethod* m = nullptr; | |
| const char* shorty; | |
| switch (src_class) { | |
| case Primitive::kPrimBoolean: | |
| m = WellKnownClasses::java_lang_Boolean_valueOf; | |
| shorty = "LZ"; | |
| break; | |
| case Primitive::kPrimByte: | |
| m = WellKnownClasses::java_lang_Byte_valueOf; | |
| shorty = "LB"; | |
| break; | |
| case Primitive::kPrimChar: | |
| m = WellKnownClasses::java_lang_Character_valueOf; | |
| shorty = "LC"; | |
| break; | |
| case Primitive::kPrimDouble: | |
| m = WellKnownClasses::java_lang_Double_valueOf; | |
| shorty = "LD"; | |
| break; | |
| case Primitive::kPrimFloat: | |
| m = WellKnownClasses::java_lang_Float_valueOf; | |
| shorty = "LF"; | |
| break; | |
| case Primitive::kPrimInt: | |
| m = WellKnownClasses::java_lang_Integer_valueOf; | |
| shorty = "LI"; | |
| break; | |
| case Primitive::kPrimLong: | |
| m = WellKnownClasses::java_lang_Long_valueOf; | |
| shorty = "LJ"; | |
| break; | |
| case Primitive::kPrimShort: | |
| m = WellKnownClasses::java_lang_Short_valueOf; | |
| shorty = "LS"; | |
| break; | |
| default: | |
| LOG(FATAL) << static_cast<int>(src_class); | |
| shorty = nullptr; | |
| } | |
| ScopedObjectAccessUnchecked soa(Thread::Current()); | |
| DCHECK_EQ(soa.Self()->GetState(), ThreadState::kRunnable); | |
| ArgArray arg_array(shorty, 2); | |
| JValue result; | |
| if (src_class == Primitive::kPrimDouble || src_class == Primitive::kPrimLong) { | |
| arg_array.AppendWide(value.GetJ()); | |
| } else { | |
| arg_array.Append(value.GetI()); | |
| } | |
| DCHECK(m->GetDeclaringClass()->IsInitialized()); // By `ClassLinker::RunRootClinits()`. | |
| m->Invoke(soa.Self(), arg_array.GetArray(), arg_array.GetNumBytes(), &result, shorty); | |
| return result.GetL(); | |
| } | |
| static std::string UnboxingFailureKind(ArtField* f) | |
| REQUIRES_SHARED(Locks::mutator_lock_) { | |
| if (f != nullptr) { | |
| return "field " + f->PrettyField(false); | |
| } | |
| return "result"; | |
| } | |
| static bool UnboxPrimitive(ObjPtr<mirror::Object> o, | |
| ObjPtr<mirror::Class> dst_class, | |
| ArtField* f, | |
| JValue* unboxed_value) | |
| REQUIRES_SHARED(Locks::mutator_lock_) { | |
| bool unbox_for_result = (f == nullptr); | |
| if (!dst_class->IsPrimitive()) { | |
| if (UNLIKELY(o != nullptr && !o->InstanceOf(dst_class))) { | |
| if (!unbox_for_result) { | |
| ThrowIllegalArgumentException( | |
| StringPrintf("%s has type %s, got %s", | |
| UnboxingFailureKind(f).c_str(), | |
| dst_class->PrettyDescriptor().c_str(), | |
| o->PrettyTypeOf().c_str()).c_str()); | |
| } else { | |
| ThrowClassCastException( | |
| StringPrintf("Couldn't convert result of type %s to %s", | |
| o->PrettyTypeOf().c_str(), | |
| dst_class->PrettyDescriptor().c_str()).c_str()); | |
| } | |
| return false; | |
| } | |
| unboxed_value->SetL(o); | |
| return true; | |
| } | |
| if (UNLIKELY(dst_class->GetPrimitiveType() == Primitive::kPrimVoid)) { | |
| ThrowIllegalArgumentException(StringPrintf("Can't unbox %s to void", | |
| UnboxingFailureKind(f).c_str()).c_str()); | |
| return false; | |
| } | |
| if (UNLIKELY(o == nullptr)) { | |
| if (!unbox_for_result) { | |
| ThrowIllegalArgumentException( | |
| StringPrintf("%s has type %s, got null", | |
| UnboxingFailureKind(f).c_str(), | |
| dst_class->PrettyDescriptor().c_str()).c_str()); | |
| } else { | |
| ThrowNullPointerException( | |
| StringPrintf("Expected to unbox a '%s' primitive type but was returned null", | |
| dst_class->PrettyDescriptor().c_str()).c_str()); | |
| } | |
| return false; | |
| } | |
| JValue boxed_value; | |
| ObjPtr<mirror::Class> klass = o->GetClass(); | |
| Primitive::Type primitive_type; | |
| if (klass == WellKnownClasses::java_lang_Boolean) { | |
| primitive_type = Primitive::kPrimBoolean; | |
| boxed_value.SetZ(WellKnownClasses::java_lang_Boolean_value->GetBoolean(o)); | |
| } else if (klass == WellKnownClasses::java_lang_Byte) { | |
| primitive_type = Primitive::kPrimByte; | |
| boxed_value.SetB(WellKnownClasses::java_lang_Byte_value->GetByte(o)); | |
| } else if (klass == WellKnownClasses::java_lang_Character) { | |
| primitive_type = Primitive::kPrimChar; | |
| boxed_value.SetC(WellKnownClasses::java_lang_Character_value->GetChar(o)); | |
| } else if (klass == WellKnownClasses::java_lang_Float) { | |
| primitive_type = Primitive::kPrimFloat; | |
| boxed_value.SetF(WellKnownClasses::java_lang_Float_value->GetFloat(o)); | |
| } else if (klass == WellKnownClasses::java_lang_Double) { | |
| primitive_type = Primitive::kPrimDouble; | |
| boxed_value.SetD(WellKnownClasses::java_lang_Double_value->GetDouble(o)); | |
| } else if (klass == WellKnownClasses::java_lang_Integer) { | |
| primitive_type = Primitive::kPrimInt; | |
| boxed_value.SetI(WellKnownClasses::java_lang_Integer_value->GetInt(o)); | |
| } else if (klass == WellKnownClasses::java_lang_Long) { | |
| primitive_type = Primitive::kPrimLong; | |
| boxed_value.SetJ(WellKnownClasses::java_lang_Long_value->GetLong(o)); | |
| } else if (klass == WellKnownClasses::java_lang_Short) { | |
| primitive_type = Primitive::kPrimShort; | |
| boxed_value.SetS(WellKnownClasses::java_lang_Short_value->GetShort(o)); | |
| } else { | |
| std::string temp; | |
| ThrowIllegalArgumentException( | |
| StringPrintf("%s has type %s, got %s", UnboxingFailureKind(f).c_str(), | |
| dst_class->PrettyDescriptor().c_str(), | |
| PrettyDescriptor(o->GetClass()->GetDescriptor(&temp)).c_str()).c_str()); | |
| return false; | |
| } | |
| return ConvertPrimitiveValue(unbox_for_result, | |
| primitive_type, | |
| dst_class->GetPrimitiveType(), | |
| boxed_value, unboxed_value); | |
| } | |
| bool UnboxPrimitiveForField(ObjPtr<mirror::Object> o, | |
| ObjPtr<mirror::Class> dst_class, | |
| ArtField* f, | |
| JValue* unboxed_value) { | |
| DCHECK(f != nullptr); | |
| return UnboxPrimitive(o, dst_class, f, unboxed_value); | |
| } | |
| bool UnboxPrimitiveForResult(ObjPtr<mirror::Object> o, | |
| ObjPtr<mirror::Class> dst_class, | |
| JValue* unboxed_value) { | |
| return UnboxPrimitive(o, dst_class, nullptr, unboxed_value); | |
| } | |
| ObjPtr<mirror::Class> GetCallingClass(Thread* self, size_t num_frames) { | |
| NthCallerVisitor visitor(self, num_frames); | |
| visitor.WalkStack(); | |
| return visitor.caller != nullptr ? visitor.caller->GetDeclaringClass() : nullptr; | |
| } | |
| bool VerifyAccess(Thread* self, | |
| ObjPtr<mirror::Object> obj, | |
| ObjPtr<mirror::Class> declaring_class, | |
| uint32_t access_flags, | |
| ObjPtr<mirror::Class>* calling_class, | |
| size_t num_frames) { | |
| if ((access_flags & kAccPublic) != 0) { | |
| return true; | |
| } | |
| ObjPtr<mirror::Class> klass = GetCallingClass(self, num_frames); | |
| if (UNLIKELY(klass == nullptr)) { | |
| // The caller is an attached native thread. | |
| return false; | |
| } | |
| *calling_class = klass; | |
| return VerifyAccess(obj, declaring_class, access_flags, klass); | |
| } | |
| bool VerifyAccess(ObjPtr<mirror::Object> obj, | |
| ObjPtr<mirror::Class> declaring_class, | |
| uint32_t access_flags, | |
| ObjPtr<mirror::Class> calling_class) { | |
| if (calling_class == declaring_class) { | |
| return true; | |
| } | |
| ScopedAssertNoThreadSuspension sants("verify-access"); | |
| if ((access_flags & kAccPrivate) != 0) { | |
| return false; | |
| } | |
| if ((access_flags & kAccProtected) != 0) { | |
| if (obj != nullptr && !obj->InstanceOf(calling_class) && | |
| !declaring_class->IsInSamePackage(calling_class)) { | |
| return false; | |
| } else if (declaring_class->IsAssignableFrom(calling_class)) { | |
| return true; | |
| } | |
| } | |
| return declaring_class->IsInSamePackage(calling_class); | |
| } | |
| void InvalidReceiverError(ObjPtr<mirror::Object> o, ObjPtr<mirror::Class> c) { | |
| std::string expected_class_name(mirror::Class::PrettyDescriptor(c)); | |
| std::string actual_class_name(mirror::Object::PrettyTypeOf(o)); | |
| ThrowIllegalArgumentException(StringPrintf("Expected receiver of type %s, but got %s", | |
| expected_class_name.c_str(), | |
| actual_class_name.c_str()).c_str()); | |
| } | |
| // This only works if there's one reference which points to the object in obj. | |
| // Will need to be fixed if there's cases where it's not. | |
| void UpdateReference(Thread* self, jobject obj, ObjPtr<mirror::Object> result) { | |
| IndirectRef ref = reinterpret_cast<IndirectRef>(obj); | |
| IndirectRefKind kind = IndirectReferenceTable::GetIndirectRefKind(ref); | |
| if (kind == kLocal) { | |
| self->GetJniEnv()->UpdateLocal(obj, result); | |
| } else if (kind == kJniTransition) { | |
| LOG(FATAL) << "Unsupported UpdateReference for kind kJniTransition"; | |
| } else if (kind == kGlobal) { | |
| self->GetJniEnv()->GetVm()->UpdateGlobal(self, ref, result); | |
| } else { | |
| DCHECK_EQ(kind, kWeakGlobal); | |
| self->GetJniEnv()->GetVm()->UpdateWeakGlobal(self, ref, result); | |
| } | |
| } | |
| } // namespace art |