diff options
Diffstat (limited to 'elf/dlerror.c')
| -rw-r--r-- | elf/dlerror.c | 146 |
1 files changed, 0 insertions, 146 deletions
diff --git a/elf/dlerror.c b/elf/dlerror.c deleted file mode 100644 index 4716bdd272..0000000000 --- a/elf/dlerror.c +++ /dev/null @@ -1,146 +0,0 @@ -/* Return error detail for failing <dlfcn.h> functions. - Copyright (C) 1995, 1996, 1997, 1998 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 - modify it under the terms of the GNU Library General Public License as - published by the Free Software Foundation; either version 2 of the - License, or (at your option) any later version. - - The GNU C Library is distributed in the hope that it will be useful, - but WITHOUT ANY WARRANTY; without even the implied warranty of - MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU - Library General Public License for more details. - - You should have received a copy of the GNU Library General Public - License along with the GNU C Library; see the file COPYING.LIB. If not, - write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330, - Boston, MA 02111-1307, USA. */ - -#include <dlfcn.h> -#include <stdio.h> -#include <stdlib.h> -#include <string.h> -#include <bits/libc-lock.h> -#include <elf/ldsodefs.h> - - -/* Type for storing results of dynamic loading actions. */ -struct dl_action_result - { - int errcode; - char *errstring; - }; -static struct dl_action_result last_result; -static struct dl_action_result *static_buf; - - -/* This is the key for the thread specific memory. */ -static __libc_key_t key; - -/* Destructor for the thread-specific data. */ -static void init (void); -static void free_key_mem (void *mem); - - -char * -dlerror (void) -{ - static char *buf; - struct dl_action_result *result; - - if (buf) - { - free (buf); - buf = NULL; - } - - /* Get error string. */ - result = (struct dl_action_result *) __libc_getspecific (key); - if (result == NULL) - result = &last_result; - - if (! result->errstring) - return NULL; - - if (result->errcode == 0) - buf = result->errstring; - else - { - if (__asprintf (&buf, "%s: %s", - result->errstring, strerror (result->errcode)) == -1) - buf = NULL; - - /* We don't need the error string anymore. */ - free (result->errstring); - } - - /* Reset the error indicator. */ - result->errstring = NULL; - - return buf; -} - -int -internal_function -_dlerror_run (void (*operate) (void *), void *args) -{ - __libc_once_define (static, once); - struct dl_action_result *result; - - /* If we have not yet initialized the buffer do it now. */ - __libc_once (once, init); - - /* Get error string and number. */ - if (static_buf != NULL) - result = static_buf; - else - { - /* We don't use the static buffer and so we have a key. Use it - to get the thread-specific buffer. */ - result = __libc_getspecific (key); - if (result == NULL) - { - result = (struct dl_action_result *) calloc (1, sizeof (*result)); - if (result == NULL) - /* We are out of memory. Since this is no really critical - situation we carry on by using the global variable. - This might lead to conflicts between the threads but - they soon all will have memory problems. */ - result = &last_result; - else - /* Set the tsd. */ - __libc_setspecific (key, result); - } - } - - if (result->errstring != NULL) - /* Free the error string from the last failed command. This can - happen if `dlerror' was not run after an error was found. */ - free (result->errstring); - - result->errcode = _dl_catch_error (&result->errstring, operate, args); - - return result->errstring != NULL; -} - - -/* Initialize buffers for results. */ -static void -init (void) -{ - if (__libc_key_create (&key, free_key_mem)) - /* Creating the key failed. This means something really went - wrong. In any case use a static buffer which is better than - nothing. */ - static_buf = &last_result; -} - - -/* Free the thread specific data, this is done if a thread terminates. */ -static void -free_key_mem (void *mem) -{ - free (mem); - __libc_setspecific (key, NULL); -} |