getStackTrace

            fn getStackTrace(self: *LargeAlloc, trace_kind: TraceKind) std.debug.StackTrace {
                assert(@backingInt(trace_kind) < trace_n);
                const stack_addresses = &self.stack_addresses[@backingInt(trace_kind)];
                var len: usize = 0;
                while (len < stack_n and stack_addresses[len] != 0) {
                    len += 1;
                }
                return .{
                    .return_addresses = stack_addresses[0..len],
                    .skipped = if (len < stack_addresses.len) .none else .unknown,
                };
            }