diff options
Diffstat (limited to 'elf/dl-close.c')
| -rw-r--r-- | elf/dl-close.c | 51 |
1 files changed, 32 insertions, 19 deletions
diff --git a/elf/dl-close.c b/elf/dl-close.c index 8e5c9fc033..2c2b3b6163 100644 --- a/elf/dl-close.c +++ b/elf/dl-close.c @@ -229,6 +229,7 @@ _dl_close_worker (struct link_map *map) bool do_audit = GLRO(dl_naudit) > 0 && !ns->_ns_loaded->l_auditing; #endif bool unload_any = false; + unsigned int unload_global = 0; unsigned int first_loaded = ~0; for (unsigned int i = 0; i < nloaded; ++i) { @@ -293,6 +294,9 @@ _dl_close_worker (struct link_map *map) /* We indeed have an object to remove. */ unload_any = true; + if (imap->l_global) + ++unload_global; + /* Remember where the first dynamically loaded object is. */ if (i < first_loaded) first_loaded = i; @@ -458,6 +462,34 @@ _dl_close_worker (struct link_map *map) r->r_state = RT_DELETE; _dl_debug_state (); + if (unload_global) + { + /* Some objects are in the global scope list. Remove them. */ + struct r_scope_elem *ns_msl = ns->_ns_main_searchlist; + unsigned int i; + unsigned int j = 0; + unsigned int cnt = ns_msl->r_nlist; + + while (cnt > 0 && ns_msl->r_list[cnt - 1]->l_removed) + --cnt; + + if (cnt + unload_global == ns_msl->r_nlist) + /* Speed up removing most recently added objects. */ + j = cnt; + else + for (i = 0; i < cnt; i++) + if (ns_msl->r_list[i]->l_removed == 0) + { + if (i != j) + ns_msl->r_list[j] = ns_msl->r_list[i]; + j++; + } + ns_msl->r_nlist = j; + + if (!RTLD_SINGLE_THREAD_P) + THREAD_GSCOPE_WAIT (); + } + size_t tls_free_start; size_t tls_free_end; tls_free_start = tls_free_end = NO_TLS_OFFSET; @@ -473,25 +505,6 @@ _dl_close_worker (struct link_map *map) /* That was the last reference, and this was a dlopen-loaded object. We can unmap it. */ - if (__builtin_expect (imap->l_global, 0)) - { - /* This object is in the global scope list. Remove it. */ - struct r_scope_elem *ns_msl = ns->_ns_main_searchlist; - unsigned int cnt = ns_msl->r_nlist; - - do - --cnt; - while (ns_msl->r_list[cnt] != imap); - - /* The object was already correctly registered. */ - while (++cnt < ns_msl->r_nlist) - ns_msl->r_list[cnt - 1] = ns_msl->r_list[cnt]; - - --ns_msl->r_nlist; - - if (!RTLD_SINGLE_THREAD_P) - THREAD_GSCOPE_WAIT (); - } /* Remove the object from the dtv slotinfo array if it uses TLS. */ if (__builtin_expect (imap->l_tls_blocksize > 0, 0)) |