Modify

    const Modify = enum(u16) {
        // Random non-linear enum values to decrease the chance of undetected corruption.
        none = 0x2962,
        resized = 0x0030,
        remaped = 0x9068,
        freeing = 0x7f3d,
        freed = 0xb98b,
        _,

        fn setNone(m: *Modify) void {
            _ = @atomicRmw(Modify, m, .Xchg, .storedXor(.none, m), .monotonic);
        }

        fn opName(m: Modify) []const u8 {
            return switch (m) {
                .resized => "resize",
                .remaped => "remap",
                .freeing => "free",
                _, .none, .freed => unreachable,
            };
        }

        fn stateName(m: Modify) []const u8 {
            return switch (m) {
                .resized => "after resize",
                .remaped => "after remap",
                .freeing => "during free",
                .freed => "after free",
                _, .none => unreachable,
            };
        }

        fn storedXor(m: Modify, ptr: *Modify) Modify {
            const addr_hash: u16 = @truncate(std.hash.int(@intFromPtr(ptr)));
            return @fromBackingInt(@intCast(@backingInt(m) ^ addr_hash));
        }
    }