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Move freeres function from ld.so to libc.so.

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This commit is contained in:
Andreas Schwab 2010-09-21 13:52:12 -07:00 committed by Ulrich Drepper
parent dda51327ba
commit 56801c50d4
3 changed files with 90 additions and 88 deletions
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5
ChangeLog
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@ -1,3 +1,8 @@
2010-09-16 Andreas Schwab <schwab@redhat.com>
* elf/dl-close.c (free_slotinfo, free_mem): Move to...
* elf/dl-libc.c (free_slotinfo, free_mem): ... here.
2010-09-21 Ulrich Drepper <drepper@redhat.com>
[BZ #12037]

74
elf/dl-close.c
View File

@ -748,77 +748,3 @@ _dl_close (void *_map)
__rtld_lock_unlock_recursive (GL(dl_load_lock));
}
static bool __libc_freeres_fn_section
free_slotinfo (struct dtv_slotinfo_list **elemp)
{
size_t cnt;
if (*elemp == NULL)
/* Nothing here, all is removed (or there never was anything). */
return true;
if (!free_slotinfo (&(*elemp)->next))
/* We cannot free the entry. */
return false;
/* That cleared our next pointer for us. */
for (cnt = 0; cnt < (*elemp)->len; ++cnt)
if ((*elemp)->slotinfo[cnt].map != NULL)
/* Still used. */
return false;
/* We can remove the list element. */
free (*elemp);
*elemp = NULL;
return true;
}
libc_freeres_fn (free_mem)
{
for (Lmid_t nsid = 0; nsid < GL(dl_nns); ++nsid)
if (__builtin_expect (GL(dl_ns)[nsid]._ns_global_scope_alloc, 0) != 0
&& (GL(dl_ns)[nsid]._ns_main_searchlist->r_nlist
// XXX Check whether we need NS-specific initial_searchlist
== GLRO(dl_initial_searchlist).r_nlist))
{
/* All object dynamically loaded by the program are unloaded. Free
the memory allocated for the global scope variable. */
struct link_map **old = GL(dl_ns)[nsid]._ns_main_searchlist->r_list;
/* Put the old map in. */
GL(dl_ns)[nsid]._ns_main_searchlist->r_list
// XXX Check whether we need NS-specific initial_searchlist
= GLRO(dl_initial_searchlist).r_list;
/* Signal that the original map is used. */
GL(dl_ns)[nsid]._ns_global_scope_alloc = 0;
/* Now free the old map. */
free (old);
}
if (USE___THREAD || GL(dl_tls_dtv_slotinfo_list) != NULL)
{
/* Free the memory allocated for the dtv slotinfo array. We can do
this only if all modules which used this memory are unloaded. */
#ifdef SHARED
if (GL(dl_initial_dtv) == NULL)
/* There was no initial TLS setup, it was set up later when
it used the normal malloc. */
free_slotinfo (&GL(dl_tls_dtv_slotinfo_list));
else
#endif
/* The first element of the list does not have to be deallocated.
It was allocated in the dynamic linker (i.e., with a different
malloc), and in the static library it's in .bss space. */
free_slotinfo (&GL(dl_tls_dtv_slotinfo_list)->next);
}
void *scope_free_list = GL(dl_scope_free_list);
GL(dl_scope_free_list) = NULL;
free (scope_free_list);
}

99
elf/dl-libc.c
View File

@ -1,5 +1,5 @@
/* Handle loading and unloading shared objects for internal libc purposes.
Copyright (C) 1999-2002,2004,2005,2006,2009 Free Software Foundation, Inc.
Copyright (C) 1999-2002,2004-2006,2009,2010 Free Software Foundation, Inc.
This file is part of the GNU C Library.
Contributed by Zack Weinberg <zack@rabi.columbia.edu>, 1999.
@ -221,6 +221,34 @@ __libc_dlclose (void *map)
libc_hidden_def (__libc_dlclose)
static bool __libc_freeres_fn_section
free_slotinfo (struct dtv_slotinfo_list **elemp)
{
size_t cnt;
if (*elemp == NULL)
/* Nothing here, all is removed (or there never was anything). */
return true;
if (!free_slotinfo (&(*elemp)->next))
/* We cannot free the entry. */
return false;
/* That cleared our next pointer for us. */
for (cnt = 0; cnt < (*elemp)->len; ++cnt)
if ((*elemp)->slotinfo[cnt].map != NULL)
/* Still used. */
return false;
/* We can remove the list element. */
free (*elemp);
*elemp = NULL;
return true;
}
libc_freeres_fn (free_mem)
{
struct link_map *l;
@ -235,20 +263,63 @@ libc_freeres_fn (free_mem)
free (old);
}
/* Remove all additional names added to the objects. */
for (Lmid_t ns = 0; ns < GL(dl_nns); ++ns)
for (l = GL(dl_ns)[ns]._ns_loaded; l != NULL; l = l->l_next)
{
struct libname_list *lnp = l->l_libname->next;
{
/* Remove all additional names added to the objects. */
for (l = GL(dl_ns)[ns]._ns_loaded; l != NULL; l = l->l_next)
{
struct libname_list *lnp = l->l_libname->next;
l->l_libname->next = NULL;
l->l_libname->next = NULL;
while (lnp != NULL)
{
struct libname_list *old = lnp;
lnp = lnp->next;
if (! old->dont_free)
free (old);
}
}
while (lnp != NULL)
{
struct libname_list *old = lnp;
lnp = lnp->next;
if (! old->dont_free)
free (old);
}
}
if (__builtin_expect (GL(dl_ns)[ns]._ns_global_scope_alloc, 0) != 0
&& (GL(dl_ns)[ns]._ns_main_searchlist->r_nlist
// XXX Check whether we need NS-specific initial_searchlist
== GLRO(dl_initial_searchlist).r_nlist))
{
/* All object dynamically loaded by the program are unloaded. Free
the memory allocated for the global scope variable. */
struct link_map **old = GL(dl_ns)[ns]._ns_main_searchlist->r_list;
/* Put the old map in. */
GL(dl_ns)[ns]._ns_main_searchlist->r_list
// XXX Check whether we need NS-specific initial_searchlist
= GLRO(dl_initial_searchlist).r_list;
/* Signal that the original map is used. */
GL(dl_ns)[ns]._ns_global_scope_alloc = 0;
/* Now free the old map. */
free (old);
}
}
if (USE___THREAD || GL(dl_tls_dtv_slotinfo_list) != NULL)
{
/* Free the memory allocated for the dtv slotinfo array. We can do
this only if all modules which used this memory are unloaded. */
#ifdef SHARED
if (GL(dl_initial_dtv) == NULL)
/* There was no initial TLS setup, it was set up later when
it used the normal malloc. */
free_slotinfo (&GL(dl_tls_dtv_slotinfo_list));
else
#endif
/* The first element of the list does not have to be deallocated.
It was allocated in the dynamic linker (i.e., with a different
malloc), and in the static library it's in .bss space. */
free_slotinfo (&GL(dl_tls_dtv_slotinfo_list)->next);
}
void *scope_free_list = GL(dl_scope_free_list);
GL(dl_scope_free_list) = NULL;
free (scope_free_list);
}