blob: d144e83bebc8340ab2cb236f1ec9427b1ff112ba [file] [log] [blame]
// Copyright 2016 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.
#include "src/builtins/builtins-utils-inl.h"
#include "src/builtins/builtins.h"
#include "src/counters.h"
#include "src/elements.h"
#include "src/objects-inl.h"
#include "src/objects/js-array-inl.h"
namespace v8 {
namespace internal {
// -----------------------------------------------------------------------------
// ES6 section 22.2 TypedArray Objects
// ES6 section 22.2.3.1 get %TypedArray%.prototype.buffer
BUILTIN(TypedArrayPrototypeBuffer) {
HandleScope scope(isolate);
CHECK_RECEIVER(JSTypedArray, typed_array,
"get %TypedArray%.prototype.buffer");
return *typed_array->GetBuffer();
}
namespace {
int64_t CapRelativeIndex(Handle<Object> num, int64_t minimum, int64_t maximum) {
int64_t relative;
if (V8_LIKELY(num->IsSmi())) {
relative = Smi::ToInt(*num);
} else {
DCHECK(num->IsHeapNumber());
double fp = HeapNumber::cast(*num)->value();
if (V8_UNLIKELY(!std::isfinite(fp))) {
// +Infinity / -Infinity
DCHECK(!std::isnan(fp));
return fp < 0 ? minimum : maximum;
}
relative = static_cast<int64_t>(fp);
}
return relative < 0 ? std::max<int64_t>(relative + maximum, minimum)
: std::min<int64_t>(relative, maximum);
}
} // namespace
BUILTIN(TypedArrayPrototypeCopyWithin) {
HandleScope scope(isolate);
Handle<JSTypedArray> array;
const char* method = "%TypedArray%.prototype.copyWithin";
ASSIGN_RETURN_FAILURE_ON_EXCEPTION(
isolate, array, JSTypedArray::Validate(isolate, args.receiver(), method));
int64_t len = array->length_value();
int64_t to = 0;
int64_t from = 0;
int64_t final = len;
if (V8_LIKELY(args.length() > 1)) {
Handle<Object> num;
ASSIGN_RETURN_FAILURE_ON_EXCEPTION(
isolate, num, Object::ToInteger(isolate, args.at<Object>(1)));
to = CapRelativeIndex(num, 0, len);
if (args.length() > 2) {
ASSIGN_RETURN_FAILURE_ON_EXCEPTION(
isolate, num, Object::ToInteger(isolate, args.at<Object>(2)));
from = CapRelativeIndex(num, 0, len);
Handle<Object> end = args.atOrUndefined(isolate, 3);
if (!end->IsUndefined(isolate)) {
ASSIGN_RETURN_FAILURE_ON_EXCEPTION(isolate, num,
Object::ToInteger(isolate, end));
final = CapRelativeIndex(num, 0, len);
}
}
}
int64_t count = std::min<int64_t>(final - from, len - to);
if (count <= 0) return *array;
// TypedArray buffer may have been transferred/detached during parameter
// processing above. Return early in this case, to prevent potential UAF error
// TODO(caitp): throw here, as though the full algorithm were performed (the
// throw would have come from ecma262/#sec-integerindexedelementget)
// (see )
if (V8_UNLIKELY(array->WasNeutered())) return *array;
// Ensure processed indexes are within array bounds
DCHECK_GE(from, 0);
DCHECK_LT(from, len);
DCHECK_GE(to, 0);
DCHECK_LT(to, len);
DCHECK_GE(len - count, 0);
Handle<FixedTypedArrayBase> elements(
FixedTypedArrayBase::cast(array->elements()), isolate);
size_t element_size = array->element_size();
to = to * element_size;
from = from * element_size;
count = count * element_size;
uint8_t* data = static_cast<uint8_t*>(elements->DataPtr());
std::memmove(data + to, data + from, count);
return *array;
}
BUILTIN(TypedArrayPrototypeFill) {
HandleScope scope(isolate);
Handle<JSTypedArray> array;
const char* method = "%TypedArray%.prototype.fill";
ASSIGN_RETURN_FAILURE_ON_EXCEPTION(
isolate, array, JSTypedArray::Validate(isolate, args.receiver(), method));
ElementsKind kind = array->GetElementsKind();
Handle<Object> obj_value = args.atOrUndefined(isolate, 1);
if (kind == BIGINT64_ELEMENTS || kind == BIGUINT64_ELEMENTS) {
ASSIGN_RETURN_FAILURE_ON_EXCEPTION(isolate, obj_value,
BigInt::FromObject(isolate, obj_value));
} else {
ASSIGN_RETURN_FAILURE_ON_EXCEPTION(isolate, obj_value,
Object::ToNumber(isolate, obj_value));
}
int64_t len = array->length_value();
int64_t start = 0;
int64_t end = len;
if (args.length() > 2) {
Handle<Object> num = args.atOrUndefined(isolate, 2);
if (!num->IsUndefined(isolate)) {
ASSIGN_RETURN_FAILURE_ON_EXCEPTION(
isolate, num, Object::ToInteger(isolate, num));
start = CapRelativeIndex(num, 0, len);
num = args.atOrUndefined(isolate, 3);
if (!num->IsUndefined(isolate)) {
ASSIGN_RETURN_FAILURE_ON_EXCEPTION(
isolate, num, Object::ToInteger(isolate, num));
end = CapRelativeIndex(num, 0, len);
}
}
}
int64_t count = end - start;
if (count <= 0) return *array;
if (V8_UNLIKELY(array->WasNeutered())) return *array;
// Ensure processed indexes are within array bounds
DCHECK_GE(start, 0);
DCHECK_LT(start, len);
DCHECK_GE(end, 0);
DCHECK_LE(end, len);
DCHECK_LE(count, len);
return ElementsAccessor::ForKind(kind)->Fill(array, obj_value,
static_cast<uint32_t>(start),
static_cast<uint32_t>(end));
}
BUILTIN(TypedArrayPrototypeIncludes) {
HandleScope scope(isolate);
Handle<JSTypedArray> array;
const char* method = "%TypedArray%.prototype.includes";
ASSIGN_RETURN_FAILURE_ON_EXCEPTION(
isolate, array, JSTypedArray::Validate(isolate, args.receiver(), method));
if (args.length() < 2) return ReadOnlyRoots(isolate).false_value();
int64_t len = array->length_value();
if (len == 0) return ReadOnlyRoots(isolate).false_value();
int64_t index = 0;
if (args.length() > 2) {
Handle<Object> num;
ASSIGN_RETURN_FAILURE_ON_EXCEPTION(
isolate, num, Object::ToInteger(isolate, args.at<Object>(2)));
index = CapRelativeIndex(num, 0, len);
}
// TODO(cwhan.tunz): throw. See the above comment in CopyWithin.
if (V8_UNLIKELY(array->WasNeutered()))
return ReadOnlyRoots(isolate).false_value();
Handle<Object> search_element = args.atOrUndefined(isolate, 1);
ElementsAccessor* elements = array->GetElementsAccessor();
Maybe<bool> result = elements->IncludesValue(isolate, array, search_element,
static_cast<uint32_t>(index),
static_cast<uint32_t>(len));
MAYBE_RETURN(result, ReadOnlyRoots(isolate).exception());
return *isolate->factory()->ToBoolean(result.FromJust());
}
BUILTIN(TypedArrayPrototypeIndexOf) {
HandleScope scope(isolate);
Handle<JSTypedArray> array;
const char* method = "%TypedArray%.prototype.indexOf";
ASSIGN_RETURN_FAILURE_ON_EXCEPTION(
isolate, array, JSTypedArray::Validate(isolate, args.receiver(), method));
int64_t len = array->length_value();
if (len == 0) return Smi::FromInt(-1);
int64_t index = 0;
if (args.length() > 2) {
Handle<Object> num;
ASSIGN_RETURN_FAILURE_ON_EXCEPTION(
isolate, num, Object::ToInteger(isolate, args.at<Object>(2)));
index = CapRelativeIndex(num, 0, len);
}
// TODO(cwhan.tunz): throw. See the above comment in CopyWithin.
if (V8_UNLIKELY(array->WasNeutered())) return Smi::FromInt(-1);
Handle<Object> search_element = args.atOrUndefined(isolate, 1);
ElementsAccessor* elements = array->GetElementsAccessor();
Maybe<int64_t> result = elements->IndexOfValue(isolate, array, search_element,
static_cast<uint32_t>(index),
static_cast<uint32_t>(len));
MAYBE_RETURN(result, ReadOnlyRoots(isolate).exception());
return *isolate->factory()->NewNumberFromInt64(result.FromJust());
}
BUILTIN(TypedArrayPrototypeLastIndexOf) {
HandleScope scope(isolate);
Handle<JSTypedArray> array;
const char* method = "%TypedArray%.prototype.lastIndexOf";
ASSIGN_RETURN_FAILURE_ON_EXCEPTION(
isolate, array, JSTypedArray::Validate(isolate, args.receiver(), method));
int64_t len = array->length_value();
if (len == 0) return Smi::FromInt(-1);
int64_t index = len - 1;
if (args.length() > 2) {
Handle<Object> num;
ASSIGN_RETURN_FAILURE_ON_EXCEPTION(
isolate, num, Object::ToInteger(isolate, args.at<Object>(2)));
// Set a negative value (-1) for returning -1 if num is negative and
// len + num is still negative. Upper bound is len - 1.
index = std::min<int64_t>(CapRelativeIndex(num, -1, len), len - 1);
}
if (index < 0) return Smi::FromInt(-1);
// TODO(cwhan.tunz): throw. See the above comment in CopyWithin.
if (V8_UNLIKELY(array->WasNeutered())) return Smi::FromInt(-1);
Handle<Object> search_element = args.atOrUndefined(isolate, 1);
ElementsAccessor* elements = array->GetElementsAccessor();
Maybe<int64_t> result = elements->LastIndexOfValue(
array, search_element, static_cast<uint32_t>(index));
MAYBE_RETURN(result, ReadOnlyRoots(isolate).exception());
return *isolate->factory()->NewNumberFromInt64(result.FromJust());
}
BUILTIN(TypedArrayPrototypeReverse) {
HandleScope scope(isolate);
Handle<JSTypedArray> array;
const char* method = "%TypedArray%.prototype.reverse";
ASSIGN_RETURN_FAILURE_ON_EXCEPTION(
isolate, array, JSTypedArray::Validate(isolate, args.receiver(), method));
ElementsAccessor* elements = array->GetElementsAccessor();
elements->Reverse(*array);
return *array;
}
} // namespace internal
} // namespace v8