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improve networking in emscripten

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This commit is contained in:
Mark McCaskey
2019-07-01 16:36:30 -07:00
parent fada36a72c
commit 623bec001f
7 changed files with 170 additions and 73 deletions
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16
lib/runtime-core/src/memory/ptr.rs
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@ -46,7 +46,9 @@ fn align_pointer(ptr: usize, align: usize) -> usize {
impl<T: Copy + ValueType> WasmPtr<T, Item> {
#[inline]
pub fn deref<'a>(self, memory: &'a Memory) -> Option<&'a Cell<T>> {
if (self.offset as usize) + mem::size_of::<T>() >= memory.size().bytes().0 {
if self.offset == 0
|| (self.offset as usize) + mem::size_of::<T>() >= memory.size().bytes().0
{
return None;
}
unsafe {
@ -60,7 +62,9 @@ impl<T: Copy + ValueType> WasmPtr<T, Item> {
#[inline]
pub unsafe fn deref_mut<'a>(self, memory: &'a Memory) -> Option<&'a mut Cell<T>> {
if (self.offset as usize) + mem::size_of::<T>() >= memory.size().bytes().0 {
if self.offset == 0
|| (self.offset as usize) + mem::size_of::<T>() >= memory.size().bytes().0
{
return None;
}
let cell_ptr = align_pointer(
@ -79,7 +83,9 @@ impl<T: Copy + ValueType> WasmPtr<T, Array> {
let item_size = mem::size_of::<T>() + (mem::size_of::<T>() % mem::align_of::<T>());
let slice_full_len = index as usize + length as usize;
if (self.offset as usize) + (item_size * slice_full_len) >= memory.size().bytes().0 {
if self.offset == 0
|| (self.offset as usize) + (item_size * slice_full_len) >= memory.size().bytes().0
{
return None;
}
@ -106,7 +112,9 @@ impl<T: Copy + ValueType> WasmPtr<T, Array> {
let item_size = mem::size_of::<T>() + (mem::size_of::<T>() % mem::align_of::<T>());
let slice_full_len = index as usize + length as usize;
if (self.offset as usize) + (item_size * slice_full_len) >= memory.size().bytes().0 {
if self.offset == 0
|| (self.offset as usize) + (item_size * slice_full_len) >= memory.size().bytes().0
{
return None;
}