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1 // Copyright 2014 the V8 project authors. All rights reserved. | 1 // Copyright 2014 the V8 project authors. All rights reserved. |
2 // Use of this source code is governed by a BSD-style license that can be | 2 // Use of this source code is governed by a BSD-style license that can be |
3 // found in the LICENSE file. | 3 // found in the LICENSE file. |
4 | 4 |
5 #include "src/factory.h" | 5 #include "src/factory.h" |
6 | 6 |
7 #include "src/allocation-site-scopes.h" | 7 #include "src/allocation-site-scopes.h" |
8 #include "src/base/bits.h" | 8 #include "src/base/bits.h" |
9 #include "src/bootstrapper.h" | 9 #include "src/bootstrapper.h" |
10 #include "src/conversions.h" | 10 #include "src/conversions.h" |
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1818 #undef TYPED_ARRAY_CASE | 1818 #undef TYPED_ARRAY_CASE |
1819 } | 1819 } |
1820 | 1820 |
1821 | 1821 |
1822 size_t GetExternalArrayElementSize(ExternalArrayType type) { | 1822 size_t GetExternalArrayElementSize(ExternalArrayType type) { |
1823 switch (type) { | 1823 switch (type) { |
1824 #define TYPED_ARRAY_CASE(Type, type, TYPE, ctype, size) \ | 1824 #define TYPED_ARRAY_CASE(Type, type, TYPE, ctype, size) \ |
1825 case kExternal##Type##Array: \ | 1825 case kExternal##Type##Array: \ |
1826 return size; | 1826 return size; |
1827 TYPED_ARRAYS(TYPED_ARRAY_CASE) | 1827 TYPED_ARRAYS(TYPED_ARRAY_CASE) |
| 1828 default: |
| 1829 UNREACHABLE(); |
| 1830 return 0; |
1828 } | 1831 } |
1829 UNREACHABLE(); | |
1830 return 0; | |
1831 #undef TYPED_ARRAY_CASE | 1832 #undef TYPED_ARRAY_CASE |
1832 } | 1833 } |
1833 | 1834 |
| 1835 |
| 1836 size_t GetFixedTypedArraysElementSize(ElementsKind kind) { |
| 1837 switch (kind) { |
| 1838 #define TYPED_ARRAY_CASE(Type, type, TYPE, ctype, size) \ |
| 1839 case TYPE##_ELEMENTS: \ |
| 1840 return size; |
| 1841 TYPED_ARRAYS(TYPED_ARRAY_CASE) |
| 1842 default: |
| 1843 UNREACHABLE(); |
| 1844 return 0; |
| 1845 } |
| 1846 #undef TYPED_ARRAY_CASE |
| 1847 } |
| 1848 |
| 1849 |
| 1850 ExternalArrayType GetArrayTypeFromElementsKind(ElementsKind kind) { |
| 1851 switch (kind) { |
| 1852 #define TYPED_ARRAY_CASE(Type, type, TYPE, ctype, size) \ |
| 1853 case TYPE##_ELEMENTS: \ |
| 1854 return kExternal##Type##Array; |
| 1855 TYPED_ARRAYS(TYPED_ARRAY_CASE) |
| 1856 default: |
| 1857 UNREACHABLE(); |
| 1858 return kExternalInt8Array; |
| 1859 } |
| 1860 #undef TYPED_ARRAY_CASE |
| 1861 } |
| 1862 |
1834 | 1863 |
1835 JSFunction* GetTypedArrayFun(ExternalArrayType type, Isolate* isolate) { | 1864 JSFunction* GetTypedArrayFun(ExternalArrayType type, Isolate* isolate) { |
1836 Context* native_context = isolate->context()->native_context(); | 1865 Context* native_context = isolate->context()->native_context(); |
1837 switch (type) { | 1866 switch (type) { |
1838 #define TYPED_ARRAY_FUN(Type, type, TYPE, ctype, size) \ | 1867 #define TYPED_ARRAY_FUN(Type, type, TYPE, ctype, size) \ |
1839 case kExternal##Type##Array: \ | 1868 case kExternal##Type##Array: \ |
1840 return native_context->type##_array_fun(); | 1869 return native_context->type##_array_fun(); |
1841 | 1870 |
1842 TYPED_ARRAYS(TYPED_ARRAY_FUN) | 1871 TYPED_ARRAYS(TYPED_ARRAY_FUN) |
1843 #undef TYPED_ARRAY_FUN | 1872 #undef TYPED_ARRAY_FUN |
1844 | 1873 |
1845 default: | 1874 default: |
1846 UNREACHABLE(); | 1875 UNREACHABLE(); |
1847 return NULL; | 1876 return NULL; |
1848 } | 1877 } |
1849 } | 1878 } |
1850 | 1879 |
1851 | 1880 |
| 1881 JSFunction* GetTypedArrayFun(ElementsKind elements_kind, Isolate* isolate) { |
| 1882 Context* native_context = isolate->context()->native_context(); |
| 1883 switch (elements_kind) { |
| 1884 #define TYPED_ARRAY_FUN(Type, type, TYPE, ctype, size) \ |
| 1885 case TYPE##_ELEMENTS: \ |
| 1886 return native_context->type##_array_fun(); |
| 1887 |
| 1888 TYPED_ARRAYS(TYPED_ARRAY_FUN) |
| 1889 #undef TYPED_ARRAY_FUN |
| 1890 |
| 1891 default: |
| 1892 UNREACHABLE(); |
| 1893 return NULL; |
| 1894 } |
| 1895 } |
| 1896 |
| 1897 |
1852 void SetupArrayBufferView(i::Isolate* isolate, | 1898 void SetupArrayBufferView(i::Isolate* isolate, |
1853 i::Handle<i::JSArrayBufferView> obj, | 1899 i::Handle<i::JSArrayBufferView> obj, |
1854 i::Handle<i::JSArrayBuffer> buffer, | 1900 i::Handle<i::JSArrayBuffer> buffer, |
1855 size_t byte_offset, size_t byte_length) { | 1901 size_t byte_offset, size_t byte_length) { |
1856 DCHECK(byte_offset + byte_length <= | 1902 DCHECK(byte_offset + byte_length <= |
1857 static_cast<size_t>(buffer->byte_length()->Number())); | 1903 static_cast<size_t>(buffer->byte_length()->Number())); |
1858 | 1904 |
1859 obj->set_buffer(*buffer); | 1905 obj->set_buffer(*buffer); |
1860 | 1906 |
1861 Heap* heap = isolate->heap(); | 1907 Heap* heap = isolate->heap(); |
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1883 Handle<JSTypedArray> Factory::NewJSTypedArray(ExternalArrayType type) { | 1929 Handle<JSTypedArray> Factory::NewJSTypedArray(ExternalArrayType type) { |
1884 Handle<JSFunction> typed_array_fun_handle(GetTypedArrayFun(type, isolate())); | 1930 Handle<JSFunction> typed_array_fun_handle(GetTypedArrayFun(type, isolate())); |
1885 | 1931 |
1886 CALL_HEAP_FUNCTION( | 1932 CALL_HEAP_FUNCTION( |
1887 isolate(), | 1933 isolate(), |
1888 isolate()->heap()->AllocateJSObject(*typed_array_fun_handle), | 1934 isolate()->heap()->AllocateJSObject(*typed_array_fun_handle), |
1889 JSTypedArray); | 1935 JSTypedArray); |
1890 } | 1936 } |
1891 | 1937 |
1892 | 1938 |
| 1939 Handle<JSTypedArray> Factory::NewJSTypedArray(ElementsKind elements_kind) { |
| 1940 Handle<JSFunction> typed_array_fun_handle( |
| 1941 GetTypedArrayFun(elements_kind, isolate())); |
| 1942 |
| 1943 CALL_HEAP_FUNCTION( |
| 1944 isolate(), isolate()->heap()->AllocateJSObject(*typed_array_fun_handle), |
| 1945 JSTypedArray); |
| 1946 } |
| 1947 |
| 1948 |
1893 Handle<JSTypedArray> Factory::NewJSTypedArray(ExternalArrayType type, | 1949 Handle<JSTypedArray> Factory::NewJSTypedArray(ExternalArrayType type, |
1894 Handle<JSArrayBuffer> buffer, | 1950 Handle<JSArrayBuffer> buffer, |
1895 size_t byte_offset, | 1951 size_t byte_offset, |
1896 size_t length) { | 1952 size_t length) { |
1897 Handle<JSTypedArray> obj = NewJSTypedArray(type); | 1953 Handle<JSTypedArray> obj = NewJSTypedArray(type); |
1898 | 1954 |
1899 size_t element_size = GetExternalArrayElementSize(type); | 1955 size_t element_size = GetExternalArrayElementSize(type); |
1900 ElementsKind elements_kind = GetExternalArrayElementsKind(type); | 1956 ElementsKind elements_kind = GetExternalArrayElementsKind(type); |
1901 | 1957 |
1902 CHECK(byte_offset % element_size == 0); | 1958 CHECK(byte_offset % element_size == 0); |
1903 | 1959 |
1904 CHECK(length <= (std::numeric_limits<size_t>::max() / element_size)); | 1960 CHECK(length <= (std::numeric_limits<size_t>::max() / element_size)); |
1905 CHECK(length <= static_cast<size_t>(Smi::kMaxValue)); | 1961 CHECK(length <= static_cast<size_t>(Smi::kMaxValue)); |
1906 size_t byte_length = length * element_size; | 1962 size_t byte_length = length * element_size; |
1907 SetupArrayBufferView(isolate(), obj, buffer, byte_offset, byte_length); | 1963 SetupArrayBufferView(isolate(), obj, buffer, byte_offset, byte_length); |
1908 | 1964 |
1909 Handle<Object> length_object = NewNumberFromSize(length); | 1965 Handle<Object> length_object = NewNumberFromSize(length); |
1910 obj->set_length(*length_object); | 1966 obj->set_length(*length_object); |
1911 | 1967 |
1912 Handle<ExternalArray> elements = NewExternalArray( | 1968 Handle<ExternalArray> elements = NewExternalArray( |
1913 static_cast<int>(length), type, | 1969 static_cast<int>(length), type, |
1914 static_cast<uint8_t*>(buffer->backing_store()) + byte_offset); | 1970 static_cast<uint8_t*>(buffer->backing_store()) + byte_offset); |
1915 Handle<Map> map = JSObject::GetElementsTransitionMap(obj, elements_kind); | 1971 Handle<Map> map = JSObject::GetElementsTransitionMap(obj, elements_kind); |
1916 JSObject::SetMapAndElements(obj, map, elements); | 1972 JSObject::SetMapAndElements(obj, map, elements); |
1917 return obj; | 1973 return obj; |
1918 } | 1974 } |
1919 | 1975 |
1920 | 1976 |
| 1977 Handle<JSTypedArray> Factory::NewJSTypedArray(ElementsKind elements_kind, |
| 1978 size_t number_of_elements) { |
| 1979 Handle<JSTypedArray> obj = NewJSTypedArray(elements_kind); |
| 1980 |
| 1981 size_t element_size = GetFixedTypedArraysElementSize(elements_kind); |
| 1982 ExternalArrayType array_type = GetArrayTypeFromElementsKind(elements_kind); |
| 1983 |
| 1984 CHECK(number_of_elements <= |
| 1985 (std::numeric_limits<size_t>::max() / element_size)); |
| 1986 CHECK(number_of_elements <= static_cast<size_t>(Smi::kMaxValue)); |
| 1987 size_t byte_length = number_of_elements * element_size; |
| 1988 |
| 1989 obj->set_byte_offset(Smi::FromInt(0)); |
| 1990 i::Handle<i::Object> byte_length_object = |
| 1991 isolate()->factory()->NewNumberFromSize(byte_length); |
| 1992 obj->set_byte_length(*byte_length_object); |
| 1993 Handle<Object> length_object = NewNumberFromSize(number_of_elements); |
| 1994 obj->set_length(*length_object); |
| 1995 |
| 1996 obj->set_buffer(Smi::FromInt(0)); |
| 1997 obj->set_weak_next(isolate()->heap()->undefined_value()); |
| 1998 Handle<FixedTypedArrayBase> elements = |
| 1999 isolate()->factory()->NewFixedTypedArray( |
| 2000 static_cast<int>(number_of_elements), array_type); |
| 2001 obj->set_elements(*elements); |
| 2002 return obj; |
| 2003 } |
| 2004 |
| 2005 |
1921 Handle<JSDataView> Factory::NewJSDataView(Handle<JSArrayBuffer> buffer, | 2006 Handle<JSDataView> Factory::NewJSDataView(Handle<JSArrayBuffer> buffer, |
1922 size_t byte_offset, | 2007 size_t byte_offset, |
1923 size_t byte_length) { | 2008 size_t byte_length) { |
1924 Handle<JSDataView> obj = NewJSDataView(); | 2009 Handle<JSDataView> obj = NewJSDataView(); |
1925 SetupArrayBufferView(isolate(), obj, buffer, byte_offset, byte_length); | 2010 SetupArrayBufferView(isolate(), obj, buffer, byte_offset, byte_length); |
1926 return obj; | 2011 return obj; |
1927 } | 2012 } |
1928 | 2013 |
1929 | 2014 |
1930 Handle<JSProxy> Factory::NewJSProxy(Handle<Object> handler, | 2015 Handle<JSProxy> Factory::NewJSProxy(Handle<Object> handler, |
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2397 return Handle<Object>::null(); | 2482 return Handle<Object>::null(); |
2398 } | 2483 } |
2399 | 2484 |
2400 | 2485 |
2401 Handle<Object> Factory::ToBoolean(bool value) { | 2486 Handle<Object> Factory::ToBoolean(bool value) { |
2402 return value ? true_value() : false_value(); | 2487 return value ? true_value() : false_value(); |
2403 } | 2488 } |
2404 | 2489 |
2405 | 2490 |
2406 } } // namespace v8::internal | 2491 } } // namespace v8::internal |
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