quick_fillarray_entrypoints.cc revision 7655f29fabc0a12765de828914a18314382e5a35 
1/*
2 * Copyright (C) 2012 The Android Open Source Project
3 *
4 * Licensed under the Apache License, Version 2.0 (the "License");
5 * you may not use this file except in compliance with the License.
6 * You may obtain a copy of the License at
7 *
8 *      http://www.apache.org/licenses/LICENSE-2.0
9 *
10 * Unless required by applicable law or agreed to in writing, software
11 * distributed under the License is distributed on an "AS IS" BASIS,
12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 * See the License for the specific language governing permissions and
14 * limitations under the License.
15 */
16
17#include "callee_save_frame.h"
18#include "common_throws.h"
19#include "dex_instruction.h"
20#include "mirror/array.h"
21#include "mirror/object-inl.h"
22
23namespace art {
24
25/*
26 * Fill the array with predefined constant values, throwing exceptions if the array is null or
27 * not of sufficient length.
28 *
29 * NOTE: When dealing with a raw dex file, the data to be copied uses
30 * little-endian ordering.  Require that oat2dex do any required swapping
31 * so this routine can get by with a memcpy().
32 *
33 * Format of the data:
34 *  ushort ident = 0x0300   magic value
35 *  ushort width            width of each element in the table
36 *  uint   size             number of elements in the table
37 *  ubyte  data[size*width] table of data values (may contain a single-byte
38 *                          padding at the end)
39 */
40extern "C" int artHandleFillArrayDataFromCode(mirror::Array* array,
41                                              const Instruction::ArrayDataPayload* payload,
42                                              Thread* self, mirror::AbstractMethod** sp)
43    SHARED_LOCKS_REQUIRED(Locks::mutator_lock_) {
44  FinishCalleeSaveFrameSetup(self, sp, Runtime::kRefsOnly);
45  DCHECK_EQ(payload->ident, static_cast<uint16_t>(Instruction::kArrayDataSignature));
46  if (UNLIKELY(array == NULL)) {
47    ThrowNullPointerException(NULL, "null array in FILL_ARRAY_DATA");
48    return -1;  // Error
49  }
50  DCHECK(array->IsArrayInstance() && !array->IsObjectArray());
51  if (UNLIKELY(static_cast<int32_t>(payload->element_count) > array->GetLength())) {
52    ThrowLocation throw_location = self->GetCurrentLocationForThrow();
53    self->ThrowNewExceptionF(throw_location, "Ljava/lang/ArrayIndexOutOfBoundsException;",
54                             "failed FILL_ARRAY_DATA; length=%d, index=%d",
55                             array->GetLength(), payload->element_count - 1);
56    return -1;  // Error
57  }
58  uint32_t size_in_bytes = payload->element_count * payload->element_width;
59  memcpy(array->GetRawData(payload->element_width), payload->data, size_in_bytes);
60  return 0;  // Success
61}
62
63}  // namespace art
64