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Fix data view accessors to throw execptions on offsets bigger than size_t.

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R=jkummerow@chromium.org
BUG=v8:3013
LOG=Y

Review URL: https://codereview.chromium.org/74583003

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@17840 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
This commit is contained in:
dslomov@chromium.org 2013-11-18 15:16:22 +00:00
parent cb6e8b334d
commit 6749e57f47
3 changed files with 45 additions and 12 deletions
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10
src/runtime.cc
View File

@ -1212,7 +1212,10 @@ inline static bool DataViewGetValue(
Handle<Object> byte_offset_obj,
bool is_little_endian,
T* result) {
size_t byte_offset = NumberToSize(isolate, *byte_offset_obj);
size_t byte_offset = 0;
if (!TryNumberToSize(isolate, *byte_offset_obj, &byte_offset)) {
return false;
}
Handle<JSArrayBuffer> buffer(JSArrayBuffer::cast(data_view->buffer()));
size_t data_view_byte_offset =
@ -1253,7 +1256,10 @@ static bool DataViewSetValue(
Handle<Object> byte_offset_obj,
bool is_little_endian,
T data) {
size_t byte_offset = NumberToSize(isolate, *byte_offset_obj);
size_t byte_offset = 0;
if (!TryNumberToSize(isolate, *byte_offset_obj, &byte_offset)) {
return false;
}
Handle<JSArrayBuffer> buffer(JSArrayBuffer::cast(data_view->buffer()));
size_t data_view_byte_offset =

35
src/v8conversions.h
View File

@ -55,26 +55,41 @@ double StringToDouble(UnicodeCache* unicode_cache,
// Converts a string into an integer.
double StringToInt(UnicodeCache* unicode_cache, String* str, int radix);
// Converts a number into size_t.
inline size_t NumberToSize(Isolate* isolate,
Object* number) {
inline bool TryNumberToSize(Isolate* isolate,
Object* number, size_t* result) {
SealHandleScope shs(isolate);
if (number->IsSmi()) {
int value = Smi::cast(number)->value();
CHECK_GE(value, 0);
ASSERT(
static_cast<unsigned>(Smi::kMaxValue)
<= std::numeric_limits<size_t>::max());
return static_cast<size_t>(value);
static_cast<unsigned>(Smi::kMaxValue)
<= std::numeric_limits<size_t>::max());
if (value >= 0) {
*result = static_cast<size_t>(value);
return true;
}
return false;
} else {
ASSERT(number->IsHeapNumber());
double value = HeapNumber::cast(number)->value();
CHECK(value >= 0 &&
value <= std::numeric_limits<size_t>::max());
return static_cast<size_t>(value);
if (value >= 0 &&
value <= std::numeric_limits<size_t>::max()) {
*result = static_cast<size_t>(value);
return true;
} else {
return false;
}
}
}
// Converts a number into size_t.
inline size_t NumberToSize(Isolate* isolate,
Object* number) {
size_t result;
bool is_valid = TryNumberToSize(isolate, number, &result);
CHECK(is_valid);
return result;
}
} } // namespace v8::internal
#endif // V8_V8CONVERSIONS_H_

12
test/mjsunit/harmony/dataview-accessors.js
View File

@ -114,11 +114,13 @@ function runIntegerTestCases(isTestingGet, array, start, length) {
test(isTestingGet, "Int8", undefined, 0);
test(isTestingGet, "Int8", 8, -128);
test(isTestingGet, "Int8", 15, -1);
test(isTestingGet, "Int8", 1e12, undefined);
test(isTestingGet, "Uint8", 0, 0);
test(isTestingGet, "Uint8", undefined, 0);
test(isTestingGet, "Uint8", 8, 128);
test(isTestingGet, "Uint8", 15, 255);
test(isTestingGet, "Uint8", 1e12, undefined);
// Little endian.
test(isTestingGet, "Int16", 0, 256, true);
@ -126,6 +128,7 @@ function runIntegerTestCases(isTestingGet, array, start, length) {
test(isTestingGet, "Int16", 5, 26213, true);
test(isTestingGet, "Int16", 9, -32127, true);
test(isTestingGet, "Int16", 14, -2, true);
test(isTestingGet, "Int16", 1e12, undefined, true);
// Big endian.
test(isTestingGet, "Int16", 0, 1);
@ -133,6 +136,7 @@ function runIntegerTestCases(isTestingGet, array, start, length) {
test(isTestingGet, "Int16", 5, 25958);
test(isTestingGet, "Int16", 9, -32382);
test(isTestingGet, "Int16", 14, -257);
test(isTestingGet, "Int16", 1e12, undefined);
// Little endian.
test(isTestingGet, "Uint16", 0, 256, true);
@ -140,6 +144,7 @@ function runIntegerTestCases(isTestingGet, array, start, length) {
test(isTestingGet, "Uint16", 5, 26213, true);
test(isTestingGet, "Uint16", 9, 33409, true);
test(isTestingGet, "Uint16", 14, 65534, true);
test(isTestingGet, "Uint16", 1e12, undefined, true);
// Big endian.
test(isTestingGet, "Uint16", 0, 1);
@ -147,6 +152,7 @@ function runIntegerTestCases(isTestingGet, array, start, length) {
test(isTestingGet, "Uint16", 5, 25958);
test(isTestingGet, "Uint16", 9, 33154);
test(isTestingGet, "Uint16", 14, 65279);
test(isTestingGet, "Uint16", 1e12, undefined);
// Little endian.
test(isTestingGet, "Int32", 0, 50462976, true);
@ -155,6 +161,7 @@ function runIntegerTestCases(isTestingGet, array, start, length) {
test(isTestingGet, "Int32", 6, -2122291354, true);
test(isTestingGet, "Int32", 9, -58490239, true);
test(isTestingGet, "Int32", 12,-66052, true);
test(isTestingGet, "Int32", 1e12, undefined, true);
// Big endian.
test(isTestingGet, "Int32", 0, 66051);
@ -163,6 +170,7 @@ function runIntegerTestCases(isTestingGet, array, start, length) {
test(isTestingGet, "Int32", 6, 1718059137);
test(isTestingGet, "Int32", 9, -2122152964);
test(isTestingGet, "Int32", 12, -50462977);
test(isTestingGet, "Int32", 1e12, undefined);
// Little endian.
test(isTestingGet, "Uint32", 0, 50462976, true);
@ -171,6 +179,7 @@ function runIntegerTestCases(isTestingGet, array, start, length) {
test(isTestingGet, "Uint32", 6, 2172675942, true);
test(isTestingGet, "Uint32", 9, 4236477057, true);
test(isTestingGet, "Uint32", 12,4294901244, true);
test(isTestingGet, "Uint32", 1e12, undefined, true);
// Big endian.
test(isTestingGet, "Uint32", 0, 66051);
@ -179,6 +188,7 @@ function runIntegerTestCases(isTestingGet, array, start, length) {
test(isTestingGet, "Uint32", 6, 1718059137);
test(isTestingGet, "Uint32", 9, 2172814332);
test(isTestingGet, "Uint32", 12, 4244504319);
test(isTestingGet, "Uint32", 1e12, undefined);
}
function testFloat(isTestingGet, func, array, start, expected) {
@ -192,6 +202,7 @@ function testFloat(isTestingGet, func, array, start, expected) {
test(isTestingGet, func, 7, expected, true);
createDataView(array, 10, true, start);
test(isTestingGet, func, 10, expected, true);
test(isTestingGet, func, 1e12, undefined, true);
// Big endian.
createDataView(array, 0, false);
@ -203,6 +214,7 @@ function testFloat(isTestingGet, func, array, start, expected) {
test(isTestingGet, func, 7, expected, false);
createDataView(array, 10, false);
test(isTestingGet, func, 10, expected, false);
test(isTestingGet, func, 1e12, undefined, false);
}
function runFloatTestCases(isTestingGet, start) {