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-rw-r--r--elf/dl-fini.c185
1 files changed, 107 insertions, 78 deletions
diff --git a/elf/dl-fini.c b/elf/dl-fini.c
index b3282089a9..3cd7e7bbff 100644
--- a/elf/dl-fini.c
+++ b/elf/dl-fini.c
@@ -29,6 +29,94 @@ typedef void (*fini_t) (void);
void
internal_function
+_dl_sort_fini (struct link_map *l, struct link_map **maps, size_t nmaps,
+ char *used, Lmid_t ns)
+{
+ if (ns == LM_ID_BASE)
+ /* The main executable always comes first. */
+ l = l->l_next;
+
+ for (; l != NULL; l = l->l_next)
+ /* Do not handle ld.so in secondary namespaces and object which
+ are not removed. */
+ if (l == l->l_real && l->l_idx != -1)
+ {
+ /* Find the place in the 'maps' array. */
+ unsigned int j;
+ for (j = ns == LM_ID_BASE ? 1 : 0; maps[j] != l; ++j)
+ assert (j < nmaps);
+
+ /* Find all object for which the current one is a dependency
+ and move the found object (if necessary) in front. */
+ for (unsigned int k = j + 1; k < nmaps; ++k)
+ {
+ struct link_map **runp = maps[k]->l_initfini;
+ if (runp != NULL)
+ {
+ while (*runp != NULL)
+ if (*runp == l)
+ {
+ struct link_map *here = maps[k];
+
+ /* Move it now. */
+ memmove (&maps[j] + 1,
+ &maps[j], (k - j) * sizeof (struct link_map *));
+ maps[j] = here;
+
+ if (used != NULL)
+ {
+ char here_used = used[k];
+
+ memmove (&used[j] + 1,
+ &used[j], (k - j) * sizeof (char));
+ used[j] = here_used;
+ }
+
+ ++j;
+
+ break;
+ }
+ else
+ ++runp;
+ }
+
+ if (__builtin_expect (maps[k]->l_reldeps != NULL, 0))
+ {
+ unsigned int m = maps[k]->l_reldepsact;
+ struct link_map **relmaps = maps[k]->l_reldeps;
+
+ while (m-- > 0)
+ {
+ if (relmaps[m] == l)
+ {
+ struct link_map *here = maps[k];
+
+ /* Move it now. */
+ memmove (&maps[j] + 1,
+ &maps[j],
+ (k - j) * sizeof (struct link_map *));
+ maps[j] = here;
+
+ if (used != NULL)
+ {
+ char here_used = used[k];
+
+ memmove (&used[j] + 1,
+ &used[j], (k - j) * sizeof (char));
+ used[j] = here_used;
+ }
+
+ break;
+ }
+ }
+ }
+ }
+ }
+}
+
+
+void
+internal_function
_dl_fini (void)
{
/* Lots of fun ahead. We have to call the destructors for all still
@@ -52,25 +140,25 @@ _dl_fini (void)
int do_audit = 0;
again:
#endif
- for (Lmid_t cnt = DL_NNS - 1; cnt >= 0; --cnt)
+ for (Lmid_t ns = DL_NNS - 1; ns >= 0; --ns)
{
/* Protect against concurrent loads and unloads. */
__rtld_lock_lock_recursive (GL(dl_load_lock));
unsigned int nmaps = 0;
- unsigned int nloaded = GL(dl_ns)[cnt]._ns_nloaded;
+ unsigned int nloaded = GL(dl_ns)[ns]._ns_nloaded;
/* No need to do anything for empty namespaces or those used for
auditing DSOs. */
if (nloaded == 0
#ifdef SHARED
- || GL(dl_ns)[cnt]._ns_loaded->l_auditing != do_audit
+ || GL(dl_ns)[ns]._ns_loaded->l_auditing != do_audit
#endif
)
goto out;
/* XXX Could it be (in static binaries) that there is no object
loaded? */
- assert (cnt != LM_ID_BASE || nloaded > 0);
+ assert (ns != LM_ID_BASE || nloaded > 0);
/* Now we can allocate an array to hold all the pointers and copy
the pointers in. */
@@ -89,87 +177,28 @@ _dl_fini (void)
unsigned int i;
struct link_map *l;
- assert (nloaded != 0 || GL(dl_ns)[cnt]._ns_loaded == NULL);
- for (l = GL(dl_ns)[cnt]._ns_loaded, i = 0; l != NULL; l = l->l_next)
+ assert (nloaded != 0 || GL(dl_ns)[ns]._ns_loaded == NULL);
+ for (l = GL(dl_ns)[ns]._ns_loaded, i = 0; l != NULL; l = l->l_next)
/* Do not handle ld.so in secondary namespaces. */
if (l == l->l_real)
{
assert (i < nloaded);
- maps[i++] = l;
+ maps[i] = l;
+ l->l_idx = i;
+ ++i;
- /* Bump l_opencount of all objects so that they are not
- dlclose()ed from underneath us. */
- ++l->l_opencount;
+ /* Bump l_direct_opencount of all objects so that they are
+ not dlclose()ed from underneath us. */
+ ++l->l_direct_opencount;
}
- assert (cnt != LM_ID_BASE || i == nloaded);
- assert (cnt == LM_ID_BASE || i == nloaded || i == nloaded - 1);
+ assert (ns != LM_ID_BASE || i == nloaded);
+ assert (ns == LM_ID_BASE || i == nloaded || i == nloaded - 1);
nmaps = i;
if (nmaps != 0)
- {
- /* Now we have to do the sorting. */
- l = GL(dl_ns)[cnt]._ns_loaded;
- if (cnt == LM_ID_BASE)
- /* The main executable always comes first. */
- l = l->l_next;
- for (; l != NULL; l = l->l_next)
- /* Do not handle ld.so in secondary namespaces. */
- if (l == l->l_real)
- {
- /* Find the place in the 'maps' array. */
- unsigned int j;
- for (j = cnt == LM_ID_BASE ? 1 : 0; maps[j] != l; ++j)
- assert (j < nmaps);
-
- /* Find all object for which the current one is a dependency
- and move the found object (if necessary) in front. */
- for (unsigned int k = j + 1; k < nmaps; ++k)
- {
- struct link_map **runp = maps[k]->l_initfini;
- if (runp != NULL)
- {
- while (*runp != NULL)
- if (*runp == l)
- {
- struct link_map *here = maps[k];
-
- /* Move it now. */
- memmove (&maps[j] + 1,
- &maps[j],
- (k - j) * sizeof (struct link_map *));
- maps[j++] = here;
-
- break;
- }
- else
- ++runp;
- }
-
- if (__builtin_expect (maps[k]->l_reldeps != NULL, 0))
- {
- unsigned int m = maps[k]->l_reldepsact;
- struct link_map **relmaps = maps[k]->l_reldeps;
-
- while (m-- > 0)
- {
- if (relmaps[m] == l)
- {
- struct link_map *here = maps[k];
-
- /* Move it now. */
- memmove (&maps[j] + 1,
- &maps[j],
- (k - j) * sizeof (struct link_map *));
- maps[j] = here;
-
- break;
- }
- }
- }
- }
- }
- }
+ /* Now we have to do the sorting. */
+ _dl_sort_fini (GL(dl_ns)[ns]._ns_loaded, maps, nmaps, NULL, ns);
/* We do not rely on the linked list of loaded object anymore from
this point on. We have our own list here (maps). The various
@@ -200,7 +229,7 @@ _dl_fini (void)
& DL_DEBUG_IMPCALLS, 0))
_dl_debug_printf ("\ncalling fini: %s [%lu]\n\n",
l->l_name[0] ? l->l_name : rtld_progname,
- cnt);
+ ns);
/* First see whether an array is given. */
if (l->l_info[DT_FINI_ARRAY] != NULL)
@@ -237,7 +266,7 @@ _dl_fini (void)
}
/* Correct the previous increment. */
- --l->l_opencount;
+ --l->l_direct_opencount;
}
}
@@ -247,7 +276,6 @@ _dl_fini (void)
do_audit = 1;
goto again;
}
-#endif
if (__builtin_expect (GLRO(dl_debug_mask) & DL_DEBUG_STATISTICS, 0))
_dl_debug_printf ("\nruntime linker statistics:\n"
@@ -255,4 +283,5 @@ _dl_fini (void)
"final number of relocations from cache: %lu\n",
GL(dl_num_relocations),
GL(dl_num_cache_relocations));
+#endif
}
generated by cgit v1.2.3 (git 2.39.1) at 2024-04-19 21:52:22 +0000