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Restrict access to Luau VM from UserData destructors.

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It's unsafe to make almost any Lua calls when userdata destructor is running.
This can cause recursive GC run and crash.
See https://github.com/luau-lang/luau/pull/510 for some details.
This commit is contained in:
Alex Orlenko
2025-04-04 22:18:14 +01:00
parent 90ef25a6ee
commit 788175e0d6
10 changed files with 40 additions and 19 deletions
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mlua-sys/src/lua54/lua.rs
+2 -2
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@@ -95,10 +95,10 @@ pub type lua_Reader =
pub type lua_Writer =
unsafe extern "C-unwind" fn(L: *mut lua_State, p: *const c_void, sz: usize, ud: *mut c_void) -> c_int;
/// Type for memory-allocation functions
/// Type for memory-allocation functions (no unwinding)
#[rustfmt::skip]
pub type lua_Alloc =
unsafe extern "C-unwind" fn(ud: *mut c_void, ptr: *mut c_void, osize: usize, nsize: usize) -> *mut c_void;
unsafe extern "C" fn(ud: *mut c_void, ptr: *mut c_void, osize: usize, nsize: usize) -> *mut c_void;
/// Type for warning functions
pub type lua_WarnFunction = unsafe extern "C-unwind" fn(ud: *mut c_void, msg: *const c_char, tocont: c_int);