Continuosly dlopen and dlclose of shared object will cause a memory leak
in atexit function. This fix reuse free slots at the end of the list.
For further detail see https://bugs.busybox.net/show_bug.cgi?id=2455
Signed-off-by: Ronald Wahl <ronald.wahl@raritan.com>
Tested-by: Filippo Arcidiacono <filippo.arcidiacono@st.com>
Signed-off-by: Carmelo Amoroso <carmelo.amoroso@st.com>
__UCLIBC_MUTEX_LOCK(__atexit_lock);
+ /*
+ * Reuse free slots at the end of the list.
+ * This avoids eating memory when dlopen and dlclose modules multiple times.
+ */
+ while (__exit_count > 0) {
+ if (__exit_function_table[__exit_count-1].type == ef_free) {
+ --__exit_count;
+ } else break;
+ }
+
#ifdef __UCLIBC_DYNAMIC_ATEXIT__
/* If we are out of function table slots, make some more */
if (__exit_slots < __exit_count+1) {