mirror of
https://sourceware.org/git/glibc.git
synced 2024-12-27 05:00:15 +00:00
92 lines
2.9 KiB
C
92 lines
2.9 KiB
C
/* Memory management for dlerror messages.
|
|
Copyright (C) 2021-2024 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 Lesser General Public
|
|
License as published by the Free Software Foundation; either
|
|
version 2.1 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
|
|
Lesser General Public License for more details.
|
|
|
|
You should have received a copy of the GNU Lesser General Public
|
|
License along with the GNU C Library; if not, see
|
|
<https://www.gnu.org/licenses/>. */
|
|
|
|
#ifndef _DLERROR_H
|
|
#define _DLERROR_H
|
|
|
|
#include <dlfcn.h>
|
|
#include <ldsodefs.h>
|
|
#include <stdbool.h>
|
|
#include <stdint.h>
|
|
#include <stdlib.h>
|
|
|
|
/* Source of the errstring member in struct dl_action_result, for
|
|
finding the right deallocation routine. */
|
|
enum dl_action_result_errstring_source
|
|
{
|
|
dl_action_result_errstring_constant, /* String literal, no deallocation. */
|
|
dl_action_result_errstring_rtld, /* libc in the primary namespace. */
|
|
dl_action_result_errstring_local, /* libc in the current namespace. */
|
|
};
|
|
|
|
struct dl_action_result
|
|
{
|
|
int errcode;
|
|
char errstring_source;
|
|
bool returned;
|
|
const char *objname;
|
|
char *errstring;
|
|
};
|
|
|
|
/* Used to free the errstring member of struct dl_action_result in the
|
|
dl_action_result_errstring_rtld case. */
|
|
static inline void
|
|
dl_error_free (void *ptr)
|
|
{
|
|
#ifdef SHARED
|
|
/* In the shared case, ld.so may use a different malloc than this
|
|
namespace. */
|
|
GLRO (dl_error_free (ptr));
|
|
#else
|
|
/* Call the implementation directly. It still has to check for
|
|
pointers which cannot be freed, so do not call free directly
|
|
here. */
|
|
_dl_error_free (ptr);
|
|
#endif
|
|
}
|
|
|
|
/* Deallocate RESULT->errstring, leaving *RESULT itself allocated. */
|
|
static inline void
|
|
dl_action_result_errstring_free (struct dl_action_result *result)
|
|
{
|
|
switch (result->errstring_source)
|
|
{
|
|
case dl_action_result_errstring_constant:
|
|
break;
|
|
case dl_action_result_errstring_rtld:
|
|
dl_error_free (result->errstring);
|
|
break;
|
|
case dl_action_result_errstring_local:
|
|
free (result->errstring);
|
|
break;
|
|
}
|
|
}
|
|
|
|
/* Stand-in for an error result object whose allocation failed. No
|
|
precise message can be reported for this, but an error must still
|
|
be signaled. */
|
|
static struct dl_action_result *const dl_action_result_malloc_failed
|
|
__attribute__ ((unused)) = (struct dl_action_result *) (intptr_t) -1;
|
|
|
|
/* Thread-local variable for storing dlfcn failures for subsequent
|
|
reporting via dlerror. */
|
|
extern __thread struct dl_action_result *__libc_dlerror_result
|
|
attribute_tls_model_ie;
|
|
|
|
#endif /* _DLERROR_H */
|