/* Call the termination functions of loaded shared objects.
- Copyright (C) 1995-2016 Free Software Foundation, Inc.
+ Copyright (C) 1995-2024 Free Software Foundation, Inc.
This file is part of the GNU C Library.
The GNU C Library is free software; you can redistribute it and/or
You should have received a copy of the GNU Lesser General Public
License along with the GNU C Library; if not, see
- <http://www.gnu.org/licenses/>. */
+ <https://www.gnu.org/licenses/>. */
#include <assert.h>
#include <string.h>
#include <ldsodefs.h>
-
-
-/* Type of the constructor functions. */
-typedef void (*fini_t) (void);
-
+#include <elf-initfini.h>
void
-internal_function
-_dl_sort_fini (struct link_map **maps, size_t nmaps, char *used, Lmid_t ns)
-{
- /* A list of one element need not be sorted. */
- if (nmaps == 1)
- return;
-
- /* We can skip looking for the binary itself which is at the front
- of the search list for the main namespace. */
- unsigned int i = ns == LM_ID_BASE;
- uint16_t seen[nmaps];
- memset (seen, 0, nmaps * sizeof (seen[0]));
- while (1)
- {
- /* Keep track of which object we looked at this round. */
- ++seen[i];
- struct link_map *thisp = maps[i];
-
- /* Do not handle ld.so in secondary namespaces and object which
- are not removed. */
- if (thisp != thisp->l_real || thisp->l_idx == -1)
- goto skip;
-
- /* Find the last object in the list for which the current one is
- a dependency and move the current object behind the object
- with the dependency. */
- unsigned int k = nmaps - 1;
- while (k > i)
- {
- struct link_map **runp = maps[k]->l_initfini;
- if (runp != NULL)
- /* Look through the dependencies of the object. */
- while (*runp != NULL)
- if (__glibc_unlikely (*runp++ == thisp))
- {
- move:
- /* Move the current object to the back past the last
- object with it as the dependency. */
- memmove (&maps[i], &maps[i + 1],
- (k - i) * sizeof (maps[0]));
- maps[k] = thisp;
-
- if (used != NULL)
- {
- char here_used = used[i];
- memmove (&used[i], &used[i + 1],
- (k - i) * sizeof (used[0]));
- used[k] = here_used;
- }
-
- if (seen[i + 1] > nmaps - i)
- {
- ++i;
- goto next_clear;
- }
-
- uint16_t this_seen = seen[i];
- memmove (&seen[i], &seen[i + 1], (k - i) * sizeof (seen[0]));
- seen[k] = this_seen;
-
- goto next;
- }
-
- if (__glibc_unlikely (maps[k]->l_reldeps != NULL))
- {
- unsigned int m = maps[k]->l_reldeps->act;
- struct link_map **relmaps = &maps[k]->l_reldeps->list[0];
-
- /* Look through the relocation dependencies of the object. */
- while (m-- > 0)
- if (__glibc_unlikely (relmaps[m] == thisp))
- {
- /* If a cycle exists with a link time dependency,
- preserve the latter. */
- struct link_map **runp = thisp->l_initfini;
- if (runp != NULL)
- while (*runp != NULL)
- if (__glibc_unlikely (*runp++ == maps[k]))
- goto ignore;
- goto move;
- }
- ignore:;
- }
-
- --k;
- }
-
- skip:
- if (++i == nmaps)
- break;
- next_clear:
- memset (&seen[i], 0, (nmaps - i) * sizeof (seen[0]));
-
- next:;
- }
-}
-
-
-void
-internal_function
_dl_fini (void)
{
/* Lots of fun ahead. We have to call the destructors for all still
__rtld_lock_unlock_recursive (GL(dl_load_lock));
else
{
+#ifdef SHARED
+ _dl_audit_activity_nsid (ns, LA_ACT_DELETE);
+#endif
+
/* Now we can allocate an array to hold all the pointers and
copy the pointers in. */
struct link_map *maps[nloaded];
assert (ns == LM_ID_BASE || i == nloaded || i == nloaded - 1);
unsigned int nmaps = i;
- /* Now we have to do the sorting. */
- _dl_sort_fini (maps, nmaps, NULL, ns);
+ /* Now we have to do the sorting. We can skip looking for the
+ binary itself which is at the front of the search list for
+ the main namespace. */
+ _dl_sort_maps (maps, nmaps, (ns == LM_ID_BASE), true);
/* We do not rely on the linked list of loaded object anymore
from this point on. We have our own list here (maps). The
if (l->l_init_called)
{
- /* Make sure nothing happens if we are called twice. */
- l->l_init_called = 0;
-
- /* Is there a destructor function? */
- if (l->l_info[DT_FINI_ARRAY] != NULL
- || l->l_info[DT_FINI] != NULL)
- {
- /* When debugging print a message first. */
- if (__builtin_expect (GLRO(dl_debug_mask)
- & DL_DEBUG_IMPCALLS, 0))
- _dl_debug_printf ("\ncalling fini: %s [%lu]\n\n",
- DSO_FILENAME (l->l_name),
- ns);
-
- /* First see whether an array is given. */
- if (l->l_info[DT_FINI_ARRAY] != NULL)
- {
- ElfW(Addr) *array =
- (ElfW(Addr) *) (l->l_addr
- + l->l_info[DT_FINI_ARRAY]->d_un.d_ptr);
- unsigned int i = (l->l_info[DT_FINI_ARRAYSZ]->d_un.d_val
- / sizeof (ElfW(Addr)));
- while (i-- > 0)
- ((fini_t) array[i]) ();
- }
-
- /* Next try the old-style destructor. */
- if (l->l_info[DT_FINI] != NULL)
- DL_CALL_DT_FINI
- (l, l->l_addr + l->l_info[DT_FINI]->d_un.d_ptr);
- }
-
+ _dl_call_fini (l);
#ifdef SHARED
/* Auditing checkpoint: another object closed. */
- if (!do_audit && __builtin_expect (GLRO(dl_naudit) > 0, 0))
- {
- struct audit_ifaces *afct = GLRO(dl_audit);
- for (unsigned int cnt = 0; cnt < GLRO(dl_naudit); ++cnt)
- {
- if (afct->objclose != NULL)
- /* Return value is ignored. */
- (void) afct->objclose (&l->l_audit[cnt].cookie);
-
- afct = afct->next;
- }
- }
+ _dl_audit_objclose (l);
#endif
}
/* Correct the previous increment. */
--l->l_direct_opencount;
}
+
+#ifdef SHARED
+ _dl_audit_activity_nsid (ns, LA_ACT_CONSISTENT);
+#endif
}
}
projects / thirdparty / glibc.git / blobdiff