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* dlfcn/dlerror.c (check_free): New function. Extract common code

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from fini and free_key_mem.  Check whether this is libdl in the
	base namespace.
This commit is contained in:
Ulrich Drepper 2005-02-26 08:33:13 +00:00
parent 3706bc2a52
commit bfeabc7928
2 changed files with 28 additions and 9 deletions
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6
ChangeLog
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@ -1,3 +1,9 @@
2005-02-26 Ulrich Drepper <drepper@redhat.com>
* dlfcn/dlerror.c (check_free): New function. Extract common code
from fini and free_key_mem. Check whether this is libdl in the
base namespace.
2005-02-25 Ulrich Drepper <drepper@redhat.com>
* elf/dl-lookup.c (_dl_debug_bindings): Add namespace information

31
dlfcn/dlerror.c
View File

@ -1,5 +1,5 @@
/* Return error detail for failing <dlfcn.h> functions.
Copyright (C) 1995-2000,2002,2003,2004 Free Software Foundation, Inc.
Copyright (C) 1995-2000,2002,2003,2004,2005 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
@ -180,13 +180,30 @@ init (void)
static_buf = &last_result;
}
static void
check_free (struct dl_action_result *rec)
{
if (rec->errstring != NULL
&& strcmp (rec->errstring, "out of memory") != 0)
{
/* We can free the string only if the allocation happened in the
C library used by the dynamic linker. This means, it is
always the C library in the base namespave. */
struct link_map *map = NULL;
Dl_info info;
if (_dl_addr (check_free, &info, &map, NULL) != 0
&& map != NULL && map->l_ns == 0)
free ((char *) rec->errstring);
}
}
static void
__attribute__ ((destructor))
fini (void)
{
if (last_result.errstring != NULL
&& strcmp (last_result.errstring, "out of memory") != 0)
free ((char *) last_result.errstring);
check_free (&last_result);
}
@ -194,11 +211,7 @@ fini (void)
static void
free_key_mem (void *mem)
{
struct dl_action_result *result = (struct dl_action_result *) mem;
if (result->errstring != NULL
&& strcmp (result->errstring, "out of memory") != 0)
free ((char *) result->errstring);
check_free ((struct dl_action_result *) mem);
free (mem);
__libc_setspecific (key, NULL);