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authorUlrich Drepper <drepper@redhat.com>2005-02-26 08:33:13 +0000
committerUlrich Drepper <drepper@redhat.com>2005-02-26 08:33:13 +0000
commitbfeabc79286422471d15cff870a7c0a354af7a2f (patch)
treea4a1cc21cc5043c919852f6a9db1922029b9850c /dlfcn
parent3706bc2a52b3d33b7877b8709744dd0aaa3b186c (diff)
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* 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.
Diffstat (limited to 'dlfcn')
-rw-r--r--dlfcn/dlerror.c31
1 files changed, 22 insertions, 9 deletions
diff --git a/dlfcn/dlerror.c b/dlfcn/dlerror.c
index 8789f4f..1254381 100644
--- a/dlfcn/dlerror.c
+++ b/dlfcn/dlerror.c
@@ -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);