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-rw-r--r--elf/dl-fini.c109
1 files changed, 6 insertions, 103 deletions
diff --git a/elf/dl-fini.c b/elf/dl-fini.c
index 5864b8e066..3cfc262400 100644
--- a/elf/dl-fini.c
+++ b/elf/dl-fini.c
@@ -1,5 +1,5 @@
/* Call the termination functions of loaded shared objects.
- Copyright (C) 1995-2016 Free Software Foundation, Inc.
+ Copyright (C) 1995-2018 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
@@ -26,106 +26,6 @@ typedef void (*fini_t) (void);
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
@@ -188,8 +88,11 @@ _dl_fini (void)
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 + (ns == LM_ID_BASE), nmaps - (ns == LM_ID_BASE),
+ NULL, 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