runtime-typedarray.cc 6.43 KB
Newer Older
1 2 3 4
// Copyright 2014 the V8 project authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.

5
#include "src/arguments-inl.h"
6
#include "src/counters.h"
7
#include "src/elements.h"
8
#include "src/heap/factory.h"
9
#include "src/heap/heap-inl.h"
10
#include "src/message-template.h"
11
#include "src/objects-inl.h"
12
#include "src/objects/js-array-buffer-inl.h"
13
#include "src/runtime/runtime-utils.h"
14 15 16 17 18
#include "src/runtime/runtime.h"

namespace v8 {
namespace internal {

19
RUNTIME_FUNCTION(Runtime_ArrayBufferDetach) {
20
  HandleScope scope(isolate);
21
  DCHECK_EQ(1, args.length());
22 23 24 25 26 27 28 29
  Handle<Object> argument = args.at(0);
  // This runtime function is exposed in ClusterFuzz and as such has to
  // support arbitrary arguments.
  if (!argument->IsJSArrayBuffer()) {
    THROW_NEW_ERROR_RETURN_FAILURE(
        isolate, NewTypeError(MessageTemplate::kNotTypedArray));
  }
  Handle<JSArrayBuffer> array_buffer = Handle<JSArrayBuffer>::cast(argument);
30
  if (!array_buffer->is_detachable()) {
31
    return ReadOnlyRoots(isolate).undefined_value();
32
  }
33
  if (array_buffer->backing_store() == nullptr) {
34
    CHECK_EQ(0, array_buffer->byte_length());
35
    return ReadOnlyRoots(isolate).undefined_value();
36
  }
37
  // Shared array buffers should never be detached.
38
  CHECK(!array_buffer->is_shared());
39 40
  DCHECK(!array_buffer->is_external());
  void* backing_store = array_buffer->backing_store();
41
  size_t byte_length = array_buffer->byte_length();
42
  array_buffer->set_is_external(true);
43
  isolate->heap()->UnregisterArrayBuffer(*array_buffer);
44
  array_buffer->Detach();
45
  isolate->array_buffer_allocator()->Free(backing_store, byte_length);
46
  return ReadOnlyRoots(isolate).undefined_value();
47 48
}

49 50 51
RUNTIME_FUNCTION(Runtime_TypedArrayCopyElements) {
  HandleScope scope(isolate);
  DCHECK_EQ(3, args.length());
52
  CONVERT_ARG_HANDLE_CHECKED(JSTypedArray, target, 0);
53
  CONVERT_ARG_HANDLE_CHECKED(Object, source, 1);
54 55
  CONVERT_NUMBER_ARG_HANDLE_CHECKED(length_obj, 2);

56 57 58 59 60
  size_t length;
  CHECK(TryNumberToSize(*length_obj, &length));

  ElementsAccessor* accessor = target->GetElementsAccessor();
  return accessor->CopyElements(source, target, length);
61 62
}

63 64 65 66 67 68
RUNTIME_FUNCTION(Runtime_TypedArrayGetLength) {
  HandleScope scope(isolate);
  DCHECK_EQ(1, args.length());
  CONVERT_ARG_HANDLE_CHECKED(JSTypedArray, holder, 0);
  return holder->length();
}
69

70
RUNTIME_FUNCTION(Runtime_ArrayBufferViewWasDetached) {
71 72
  HandleScope scope(isolate);
  DCHECK_EQ(1, args.length());
73
  return isolate->heap()->ToBoolean(JSTypedArray::cast(args[0])->WasDetached());
74 75
}

76 77
RUNTIME_FUNCTION(Runtime_TypedArrayGetBuffer) {
  HandleScope scope(isolate);
78
  DCHECK_EQ(1, args.length());
79 80 81 82
  CONVERT_ARG_HANDLE_CHECKED(JSTypedArray, holder, 0);
  return *holder->GetBuffer();
}

83

84 85
namespace {

86 87 88 89 90 91 92 93 94 95 96 97 98 99 100
template <typename T>
bool CompareNum(T x, T y) {
  if (x < y) {
    return true;
  } else if (x > y) {
    return false;
  } else if (!std::is_integral<T>::value) {
    double _x = x, _y = y;
    if (x == 0 && x == y) {
      /* -0.0 is less than +0.0 */
      return std::signbit(_x) && !std::signbit(_y);
    } else if (!std::isnan(_x) && std::isnan(_y)) {
      /* number is less than NaN */
      return true;
    }
101
  }
102 103
  return false;
}
104 105 106 107 108 109 110 111 112 113 114 115 116 117

}  // namespace

RUNTIME_FUNCTION(Runtime_TypedArraySortFast) {
  HandleScope scope(isolate);
  DCHECK_EQ(1, args.length());

  CONVERT_ARG_HANDLE_CHECKED(Object, target_obj, 0);

  Handle<JSTypedArray> array;
  const char* method = "%TypedArray%.prototype.sort";
  ASSIGN_RETURN_FAILURE_ON_EXCEPTION(
      isolate, array, JSTypedArray::Validate(isolate, target_obj, method));

118
  // This line can be removed when JSTypedArray::Validate throws
119 120
  // if array.[[ViewedArrayBuffer]] is detached(v8:4648)
  if (V8_UNLIKELY(array->WasDetached())) return *array;
121 122

  size_t length = array->length_value();
123
  if (length <= 1) return *array;
124

125
  Handle<FixedTypedArrayBase> elements(
126
      FixedTypedArrayBase::cast(array->elements()), isolate);
127
  switch (array->type()) {
128
#define TYPED_ARRAY_SORT(Type, type, TYPE, ctype)           \
129 130 131 132 133 134 135 136
  case kExternal##Type##Array: {                            \
    ctype* data = static_cast<ctype*>(elements->DataPtr()); \
    if (kExternal##Type##Array == kExternalFloat64Array ||  \
        kExternal##Type##Array == kExternalFloat32Array)    \
      std::sort(data, data + length, CompareNum<ctype>);    \
    else                                                    \
      std::sort(data, data + length);                       \
    break;                                                  \
137 138 139 140 141 142 143 144
  }

    TYPED_ARRAYS(TYPED_ARRAY_SORT)
#undef TYPED_ARRAY_SORT
  }

  return *array;
}
145

146 147
RUNTIME_FUNCTION(Runtime_IsTypedArray) {
  HandleScope scope(isolate);
148
  DCHECK_EQ(1, args.length());
149 150 151
  return isolate->heap()->ToBoolean(args[0]->IsJSTypedArray());
}

152
// 22.2.3.23 %TypedArray%.prototype.set ( overloaded [ , offset ] )
153 154 155 156 157 158
RUNTIME_FUNCTION(Runtime_TypedArraySet) {
  HandleScope scope(isolate);
  Handle<JSTypedArray> target = args.at<JSTypedArray>(0);
  Handle<Object> obj = args.at(1);
  Handle<Smi> offset = args.at<Smi>(2);

159
  DCHECK(!target->WasDetached());  // Checked in TypedArrayPrototypeSet.
160
  DCHECK(!obj->IsJSTypedArray());  // Should be handled by CSA.
161
  DCHECK_LE(0, offset->value());
162 163 164

  const uint32_t uint_offset = static_cast<uint32_t>(offset->value());

165 166 167 168 169 170 171 172 173 174 175 176 177
  if (obj->IsNumber()) {
    // For number as a first argument, throw TypeError
    // instead of silently ignoring the call, so that
    // users know they did something wrong.
    // (Consistent with Firefox and Blink/WebKit)
    THROW_NEW_ERROR_RETURN_FAILURE(
        isolate, NewTypeError(MessageTemplate::kInvalidArgument));
  }

  ASSIGN_RETURN_FAILURE_ON_EXCEPTION(isolate, obj,
                                     Object::ToObject(isolate, obj));

  Handle<Object> len;
178
  ASSIGN_RETURN_FAILURE_ON_EXCEPTION(
179
      isolate, len,
180
      Object::GetProperty(isolate, obj, isolate->factory()->length_string()));
181 182 183 184 185 186
  ASSIGN_RETURN_FAILURE_ON_EXCEPTION(isolate, len,
                                     Object::ToLength(isolate, len));

  if (uint_offset + len->Number() > target->length_value()) {
    THROW_NEW_ERROR_RETURN_FAILURE(
        isolate, NewRangeError(MessageTemplate::kTypedArraySetSourceTooLarge));
187 188
  }

189 190 191 192 193 194
  uint32_t int_l;
  CHECK(DoubleToUint32IfEqualToSelf(len->Number(), &int_l));

  Handle<JSReceiver> source = Handle<JSReceiver>::cast(obj);
  ElementsAccessor* accessor = target->GetElementsAccessor();
  return accessor->CopyElements(source, target, int_l, uint_offset);
195 196
}

197 198
}  // namespace internal
}  // namespace v8