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Remove size_t from wire transfer structs

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This makes the primitives in the serialized wire protocol
the same across platforms and architectures which is better
for both fuzzing and remoting Dawn.

Commands that used size_t are updated to use uint64_t, and
the server-side implementation checks if conversion to
size_t would narrow.

Bug: dawn:680
Change-Id: Icef9dc11a72699685ed7191c34d6a922b652c887
Reviewed-on: https://dawn-review.googlesource.com/c/dawn/+/41582
Commit-Queue: Austin Eng <enga@chromium.org>
Reviewed-by: Stephen White <senorblanco@chromium.org>
This commit is contained in:
Austin Eng
2021-02-18 22:36:19 +00:00
committed by Commit Bot service account
parent f0f6d2f8e1
commit f104fea367
4 changed files with 54 additions and 26 deletions
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23
src/dawn_wire/server/ServerBuffer.cpp
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@@ -48,8 +48,8 @@ namespace dawn_wire { namespace server {
bool Server::DoBufferMapAsync(ObjectId bufferId,
uint32_t requestSerial,
WGPUMapModeFlags mode,
size_t offset,
size_t size,
uint64_t offset64,
uint64_t size64,
uint64_t handleCreateInfoLength,
const uint8_t* handleCreateInfo) {
// These requests are just forwarded to the buffer, with userdata containing what the
@@ -72,19 +72,24 @@ namespace dawn_wire { namespace server {
return false;
}
if (handleCreateInfoLength > std::numeric_limits<size_t>::max()) {
// This is the size of data deserialized from the command stream, which must be
// CPU-addressable.
return false;
}
std::unique_ptr<MapUserdata> userdata = MakeUserdata<MapUserdata>();
userdata->buffer = ObjectHandle{bufferId, buffer->generation};
userdata->bufferObj = buffer->handle;
userdata->requestSerial = requestSerial;
userdata->mode = mode;
if (offset64 > std::numeric_limits<size_t>::max() ||
size64 > std::numeric_limits<size_t>::max() ||
handleCreateInfoLength > std::numeric_limits<size_t>::max()) {
OnBufferMapAsyncCallback(WGPUBufferMapAsyncStatus_Error, userdata.get());
return true;
}
size_t offset = static_cast<size_t>(offset64);
size_t size = static_cast<size_t>(size64);
userdata->offset = offset;
userdata->size = size;
userdata->mode = mode;
// The handle will point to the mapped memory or staging memory for the mapping.
// Store it on the map request.