| // Copyright (c) 2013, the Dart project authors. Please see the AUTHORS file |
| // for details. All rights reserved. Use of this source code is governed by a |
| // BSD-style license that can be found in the LICENSE file. |
| |
| #include "vm/bootstrap_natives.h" |
| |
| #include "include/dart_api.h" |
| |
| #include "vm/exceptions.h" |
| #include "vm/native_entry.h" |
| #include "vm/object.h" |
| #include "vm/object_store.h" |
| |
| namespace dart { |
| |
| // TypedData. |
| |
| // Checks to see if offsetInBytes + num_bytes is in the range. |
| static void RangeCheck(intptr_t offset_in_bytes, |
| intptr_t access_size, |
| intptr_t length_in_bytes, |
| intptr_t element_size_in_bytes) { |
| if (!Utils::RangeCheck(offset_in_bytes, access_size, length_in_bytes)) { |
| const intptr_t index = |
| (offset_in_bytes + access_size) / element_size_in_bytes; |
| const intptr_t length = length_in_bytes / element_size_in_bytes; |
| Exceptions::ThrowRangeError("index", Integer::Handle(Integer::New(index)), |
| 0, length); |
| } |
| } |
| |
| static void AlignmentCheck(intptr_t offset_in_bytes, intptr_t element_size) { |
| if ((offset_in_bytes % element_size) != 0) { |
| const auto& error = String::Handle(String::NewFormatted( |
| "Offset in bytes (%" Pd ") must be a multiple of %" Pd "", |
| offset_in_bytes, element_size)); |
| Exceptions::ThrowArgumentError(error); |
| } |
| } |
| |
| // Checks to see if a length will not result in an OOM error. |
| static void LengthCheck(intptr_t len, intptr_t max) { |
| if (len < 0 || len > max) { |
| const String& error = String::Handle(String::NewFormatted( |
| "Length (%" Pd ") of object must be in range [0..%" Pd "]", len, max)); |
| Exceptions::ThrowArgumentError(error); |
| } |
| } |
| |
| DEFINE_NATIVE_ENTRY(TypedDataBase_length, 0, 1) { |
| GET_NON_NULL_NATIVE_ARGUMENT(TypedDataBase, array, arguments->NativeArgAt(0)); |
| return Smi::New(array.Length()); |
| } |
| |
| DEFINE_NATIVE_ENTRY(TypedDataView_offsetInBytes, 0, 1) { |
| // "this" is either a _*ArrayView class or _ByteDataView. |
| GET_NON_NULL_NATIVE_ARGUMENT(Instance, instance, arguments->NativeArgAt(0)); |
| ASSERT(instance.IsTypedDataView()); |
| return TypedDataView::Cast(instance).offset_in_bytes(); |
| } |
| |
| DEFINE_NATIVE_ENTRY(TypedDataView_typedData, 0, 1) { |
| // "this" is either a _*ArrayView class or _ByteDataView. |
| GET_NON_NULL_NATIVE_ARGUMENT(Instance, instance, arguments->NativeArgAt(0)); |
| ASSERT(instance.IsTypedDataView()); |
| return TypedDataView::Cast(instance).typed_data(); |
| } |
| |
| static BoolPtr CopyData(const TypedDataBase& dst_array, |
| const TypedDataBase& src_array, |
| const Smi& dst_start, |
| const Smi& src_start, |
| const Smi& length, |
| bool clamped) { |
| const intptr_t dst_offset_in_bytes = dst_start.Value(); |
| const intptr_t src_offset_in_bytes = src_start.Value(); |
| const intptr_t length_in_bytes = length.Value(); |
| ASSERT(Utils::RangeCheck(src_offset_in_bytes, length_in_bytes, |
| src_array.LengthInBytes())); |
| ASSERT(Utils::RangeCheck(dst_offset_in_bytes, length_in_bytes, |
| dst_array.LengthInBytes())); |
| if (clamped) { |
| TypedData::ClampedCopy(dst_array, dst_offset_in_bytes, src_array, |
| src_offset_in_bytes, length_in_bytes); |
| } else { |
| TypedData::Copy(dst_array, dst_offset_in_bytes, src_array, |
| src_offset_in_bytes, length_in_bytes); |
| } |
| return Bool::True().ptr(); |
| } |
| |
| static bool IsClamped(intptr_t cid) { |
| switch (cid) { |
| case kTypedDataUint8ClampedArrayCid: |
| case kExternalTypedDataUint8ClampedArrayCid: |
| case kTypedDataUint8ClampedArrayViewCid: |
| return true; |
| default: |
| return false; |
| } |
| } |
| |
| static bool IsUint8(intptr_t cid) { |
| switch (cid) { |
| case kTypedDataUint8ClampedArrayCid: |
| case kExternalTypedDataUint8ClampedArrayCid: |
| case kTypedDataUint8ClampedArrayViewCid: |
| case kTypedDataUint8ArrayCid: |
| case kExternalTypedDataUint8ArrayCid: |
| case kTypedDataUint8ArrayViewCid: |
| return true; |
| default: |
| return false; |
| } |
| } |
| |
| DEFINE_NATIVE_ENTRY(TypedDataBase_setRange, 0, 7) { |
| const TypedDataBase& dst = |
| TypedDataBase::CheckedHandle(zone, arguments->NativeArgAt(0)); |
| const Smi& dst_start = Smi::CheckedHandle(zone, arguments->NativeArgAt(1)); |
| const Smi& length = Smi::CheckedHandle(zone, arguments->NativeArgAt(2)); |
| const TypedDataBase& src = |
| TypedDataBase::CheckedHandle(zone, arguments->NativeArgAt(3)); |
| const Smi& src_start = Smi::CheckedHandle(zone, arguments->NativeArgAt(4)); |
| const Smi& to_cid_smi = Smi::CheckedHandle(zone, arguments->NativeArgAt(5)); |
| const Smi& from_cid_smi = Smi::CheckedHandle(zone, arguments->NativeArgAt(6)); |
| |
| if (length.Value() < 0) { |
| const String& error = String::Handle(String::NewFormatted( |
| "length (%" Pd ") must be non-negative", length.Value())); |
| Exceptions::ThrowArgumentError(error); |
| } |
| const intptr_t to_cid = to_cid_smi.Value(); |
| const intptr_t from_cid = from_cid_smi.Value(); |
| |
| const bool needs_clamping = IsClamped(to_cid) && !IsUint8(from_cid); |
| return CopyData(dst, src, dst_start, src_start, length, needs_clamping); |
| } |
| |
| // Native methods for typed data allocation are recognized and implemented |
| // in FlowGraphBuilder::BuildGraphOfRecognizedMethod. |
| // These bodies exist only to assert that they are not used. |
| #define TYPED_DATA_NEW(name) \ |
| DEFINE_NATIVE_ENTRY(TypedData_##name##_new, 0, 2) { \ |
| UNREACHABLE(); \ |
| return Object::null(); \ |
| } |
| |
| #define TYPED_DATA_NEW_NATIVE(name) TYPED_DATA_NEW(name) |
| |
| CLASS_LIST_TYPED_DATA(TYPED_DATA_NEW_NATIVE) |
| #undef TYPED_DATA_NEW_NATIVE |
| #undef TYPED_DATA_NEW |
| |
| // We check the length parameter against a possible maximum length for the |
| // array based on available physical addressable memory on the system. |
| // |
| // More specifically |
| // |
| // TypedData::MaxElements(cid) is equal to (kSmiMax / ElementSizeInBytes(cid)) |
| // |
| // which ensures that the number of bytes the array holds is guaranteed to fit |
| // into a _Smi. |
| // |
| // Argument 0 is type arguments and is ignored. |
| static InstancePtr NewTypedDataView(intptr_t cid, |
| intptr_t element_size, |
| Zone* zone, |
| NativeArguments* arguments) { |
| GET_NON_NULL_NATIVE_ARGUMENT(TypedDataBase, typed_data, |
| arguments->NativeArgAt(1)); |
| GET_NON_NULL_NATIVE_ARGUMENT(Smi, offset, arguments->NativeArgAt(2)); |
| GET_NON_NULL_NATIVE_ARGUMENT(Smi, len, arguments->NativeArgAt(3)); |
| const intptr_t backing_length = typed_data.LengthInBytes(); |
| const intptr_t offset_in_bytes = offset.Value(); |
| const intptr_t length = len.Value(); |
| AlignmentCheck(offset_in_bytes, element_size); |
| LengthCheck(offset_in_bytes + length * element_size, backing_length); |
| return TypedDataView::New(cid, typed_data, offset_in_bytes, length); |
| } |
| |
| #define TYPED_DATA_VIEW_NEW(native_name, cid) \ |
| DEFINE_NATIVE_ENTRY(native_name, 0, 4) { \ |
| return NewTypedDataView(cid, TypedDataBase::ElementSizeInBytes(cid), zone, \ |
| arguments); \ |
| } |
| |
| #define TYPED_DATA_NEW_NATIVE(name) \ |
| TYPED_DATA_VIEW_NEW(TypedDataView_##name##View_new, kTypedData##name##ViewCid) |
| |
| CLASS_LIST_TYPED_DATA(TYPED_DATA_NEW_NATIVE) |
| TYPED_DATA_VIEW_NEW(TypedDataView_ByteDataView_new, kByteDataViewCid) |
| #undef TYPED_DATA_NEW_NATIVE |
| #undef TYPED_DATA_VIEW_NEW |
| |
| #define TYPED_DATA_GETTER(getter, object, ctor, access_size) \ |
| DEFINE_NATIVE_ENTRY(TypedData_##getter, 0, 2) { \ |
| GET_NON_NULL_NATIVE_ARGUMENT(TypedDataBase, array, \ |
| arguments->NativeArgAt(0)); \ |
| GET_NON_NULL_NATIVE_ARGUMENT(Smi, offsetInBytes, \ |
| arguments->NativeArgAt(1)); \ |
| RangeCheck(offsetInBytes.Value(), access_size, array.LengthInBytes(), \ |
| access_size); \ |
| return object::ctor(array.getter(offsetInBytes.Value())); \ |
| } |
| |
| #define TYPED_DATA_SETTER(setter, object, get_object_value, access_size, \ |
| access_type) \ |
| DEFINE_NATIVE_ENTRY(TypedData_##setter, 0, 3) { \ |
| GET_NON_NULL_NATIVE_ARGUMENT(TypedDataBase, array, \ |
| arguments->NativeArgAt(0)); \ |
| GET_NON_NULL_NATIVE_ARGUMENT(Smi, offsetInBytes, \ |
| arguments->NativeArgAt(1)); \ |
| GET_NON_NULL_NATIVE_ARGUMENT(object, value, arguments->NativeArgAt(2)); \ |
| RangeCheck(offsetInBytes.Value(), access_size, array.LengthInBytes(), \ |
| access_size); \ |
| array.setter(offsetInBytes.Value(), \ |
| static_cast<access_type>(value.get_object_value())); \ |
| return Object::null(); \ |
| } |
| |
| #define TYPED_DATA_NATIVES(type_name, object, ctor, get_object_value, \ |
| access_size, access_type) \ |
| TYPED_DATA_GETTER(Get##type_name, object, ctor, access_size) \ |
| TYPED_DATA_SETTER(Set##type_name, object, get_object_value, access_size, \ |
| access_type) |
| |
| TYPED_DATA_NATIVES(Int8, Integer, New, AsTruncatedUint32Value, 1, int8_t) |
| TYPED_DATA_NATIVES(Uint8, Integer, New, AsTruncatedUint32Value, 1, uint8_t) |
| TYPED_DATA_NATIVES(Int16, Integer, New, AsTruncatedUint32Value, 2, int16_t) |
| TYPED_DATA_NATIVES(Uint16, Integer, New, AsTruncatedUint32Value, 2, uint16_t) |
| TYPED_DATA_NATIVES(Int32, Integer, New, AsTruncatedUint32Value, 4, int32_t) |
| TYPED_DATA_NATIVES(Uint32, Integer, New, AsTruncatedUint32Value, 4, uint32_t) |
| TYPED_DATA_NATIVES(Int64, Integer, New, AsTruncatedInt64Value, 8, int64_t) |
| TYPED_DATA_NATIVES(Uint64, |
| Integer, |
| NewFromUint64, |
| AsTruncatedInt64Value, |
| 8, |
| uint64_t) |
| TYPED_DATA_NATIVES(Float32, Double, New, value, 4, float) |
| TYPED_DATA_NATIVES(Float64, Double, New, value, 8, double) |
| TYPED_DATA_NATIVES(Float32x4, Float32x4, New, value, 16, simd128_value_t) |
| TYPED_DATA_NATIVES(Int32x4, Int32x4, New, value, 16, simd128_value_t) |
| TYPED_DATA_NATIVES(Float64x2, Float64x2, New, value, 16, simd128_value_t) |
| |
| } // namespace dart |
