BoomMicrophone/undo-deletions
1
0
Fork 0
forked from suyu/suyu
Code Pull requests Activity

ipc_helpers: Only allow trivially copyable objects with PushRaw() and PopRaw()

Browse source 
It's undefined behavior to use non-trivially copyable objects with
std::memcpy, so we can add asserts to catch usages of these at
compile-time.
This commit is contained in:
Lioncash 2020-08-05 14:08:26 -04:00
parent 07691f994a
commit a77ee63f65
1 changed files with 4 additions and 0 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

4
src/core/hle/ipc_helpers.h
View file

@ -229,6 +229,8 @@ inline void ResponseBuilder::Push(u32 value) {
template <typename T>
void ResponseBuilder::PushRaw(const T& value) {
static_assert(std::is_trivially_copyable_v<T>,
"It's undefined behavior to use memcpy with non-trivially copyable objects");
std::memcpy(cmdbuf + index, &value, sizeof(T));
index += (sizeof(T) + 3) / 4; // round up to word length
}
@ -384,6 +386,8 @@ inline s32 RequestParser::Pop() {
template <typename T>
void RequestParser::PopRaw(T& value) {
static_assert(std::is_trivially_copyable_v<T>,
"It's undefined behavior to use memcpy with non-trivially copyable objects");
std::memcpy(&value, cmdbuf + index, sizeof(T));
index += (sizeof(T) + 3) / 4; // round up to word length
}