1 union U {
2 x: &'static u8,
3 y: &'static libc::c_char,
4 }
5
6 #[allow(non_upper_case_globals)]
7 #[cfg_attr(prefixed, export_name = "_rjem_malloc_conf")]
8 #[cfg_attr(not(prefixed), no_mangle)]
9 pub static malloc_conf: Option<&'static libc::c_char> = Some(unsafe {
10 U {
11 x: &b"stats_print_opts:mdal\0"[0],
12 }
13 .y
14 });
15
16 #[test]
malloc_conf_set()17 fn malloc_conf_set() {
18 unsafe {
19 assert_eq!(tikv_jemalloc_sys::malloc_conf, malloc_conf);
20
21 let mut ptr: *const libc::c_char = std::ptr::null();
22 let mut ptr_len: libc::size_t = std::mem::size_of::<*const libc::c_char>() as libc::size_t;
23 let r = tikv_jemalloc_sys::mallctl(
24 &b"opt.stats_print_opts\0"[0] as *const _ as *const libc::c_char,
25 &mut ptr as *mut *const _ as *mut libc::c_void,
26 &mut ptr_len as *mut _,
27 std::ptr::null_mut(),
28 0,
29 );
30 assert_eq!(r, 0);
31 assert!(!ptr.is_null());
32
33 let s = std::ffi::CStr::from_ptr(ptr).to_string_lossy().into_owned();
34 assert!(
35 s.contains("mdal"),
36 "opt.stats_print_opts: \"{}\" (len = {})",
37 s,
38 s.len()
39 );
40 }
41 }
42