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string: Use tls-internal on strerror_l

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The buffer allocation uses the same strategy of strsignal.

Checked on x86-64-linux-gnu, i686-linux-gnu, powerpc64le-linux-gnu,
and s390x-linux-gnu.

Tested-by: Carlos O'Donell <carlos@redhat.com>
Reviewed-by: Carlos O'Donell <carlos@redhat.com>
This commit is contained in:
Adhemerval Zanella 2020-05-14 17:56:25 -03:00
parent 28aff04781
commit 725eeb4af1
7 changed files with 20 additions and 40 deletions
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3
include/string.h
View File

@ -53,9 +53,6 @@ extern char *__strerror_r (int __errnum, char *__buf, size_t __buflen);
extern char *__strerror_l (int __errnum, locale_t __loc);
/* Called as part of the thread shutdown sequence. */
void __strerror_thread_freeres (void) attribute_hidden;
/* Get _STRING_ARCH_unaligned. */
#include <string_private.h>
#endif

1
malloc/thread-freeres.c
View File

@ -32,7 +32,6 @@ __libc_thread_freeres (void)
{
call_function_static_weak (__rpc_thread_destroy);
call_function_static_weak (__res_thread_freeres);
call_function_static_weak (__strerror_thread_freeres);
__glibc_tls_internal_free ();
/* This should come last because it shuts down malloc for this

21
string/strerror_l.c
View File

@ -18,11 +18,8 @@
#include <libintl.h>
#include <locale.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <errno.h>
static __thread char *last_value;
#include <tls-internal.h>
static const char *
@ -43,12 +40,13 @@ __strerror_l (int errnum, locale_t loc)
char *err = (char *) __get_errlist (errnum);
if (__glibc_unlikely (err == NULL))
{
free (last_value);
if (__asprintf (&last_value, "%s%d",
struct tls_internal_t *tls_internal = __glibc_tls_internal ();
free (tls_internal->strerror_l_buf);
if (__asprintf (&tls_internal->strerror_l_buf, "%s%d",
translate ("Unknown error ", loc), errnum) == -1)
last_value = NULL;
tls_internal->strerror_l_buf = NULL;
err = last_value;
err = tls_internal->strerror_l_buf;
}
else
err = (char *) translate (err, loc);
@ -58,10 +56,3 @@ __strerror_l (int errnum, locale_t loc)
}
weak_alias (__strerror_l, strerror_l)
libc_hidden_def (__strerror_l)
void
__strerror_thread_freeres (void)
{
free (last_value);
}
text_set_element (__libc_subfreeres, __strerror_thread_freeres);

1
sysdeps/generic/tls-internal-struct.h
View File

@ -22,6 +22,7 @@
struct tls_internal_t
{
char *strsignal_buf;
char *strerror_l_buf;
};
#endif

1
sysdeps/generic/tls-internal.h
View File

@ -34,6 +34,7 @@ static inline void
__glibc_tls_internal_free (void)
{
free (__tls_internal.strsignal_buf);
free (__tls_internal.strerror_l_buf);
}
#endif

32
sysdeps/mach/strerror_l.c
View File

@ -23,11 +23,7 @@
#include <string.h>
#include <mach/error.h>
#include <errorlib.h>
#include <sys/param.h>
#include <libc-symbols.h>
static __thread char *last_value;
#include <tls-internal.h>
static const char *
@ -58,13 +54,14 @@ __strerror_l (int errnum, locale_t loc)
if (system > err_max_system || ! __mach_error_systems[system].bad_sub)
{
free (last_value);
if (__asprintf (&last_value, "%s%X",
struct tls_internal_t *tls_internal = __glibc_tls_internal ();
free (tls_internal->strerror_l_buf);
if (__asprintf (&tls_internal->strerror_l_buf, "%s%X",
translate ("Error in unknown error system: ", loc),
errnum) == -1)
last_value = NULL;
tls_internal->strerror_l_buf = NULL;
return last_value;
return tls_internal->strerror_l_buf;
}
es = &__mach_error_systems[system];
@ -74,25 +71,18 @@ __strerror_l (int errnum, locale_t loc)
if (code >= es->subsystem[sub].max_code)
{
free (last_value);
if (__asprintf (&last_value, "%s%s %d",
struct tls_internal_t *tls_internal = __glibc_tls_internal ();
free (tls_internal->strerror_l_buf);
if (__asprintf (&tls_internal->strerror_l_buf, "%s%s %d",
translate ("Unknown error ", loc),
translate (es->subsystem[sub].subsys_name, loc),
errnum) == -1)
last_value = NULL;
tls_internal->strerror_l_buf = NULL;
return last_value;
return tls_internal->strerror_l_buf;
}
return (char *) translate (es->subsystem[sub].codes[code], loc);
}
weak_alias (__strerror_l, strerror_l)
libc_hidden_def (__strerror_l)
/* This is called when a thread is exiting to free the last_value string. */
void
__strerror_thread_freeres (void)
{
free (last_value);
}
text_set_element (__libc_subfreeres, __strerror_thread_freeres);

1
sysdeps/unix/sysv/linux/tls-internal.h
View File

@ -32,6 +32,7 @@ static inline void
__glibc_tls_internal_free (void)
{
free (THREAD_SELF->tls_state.strsignal_buf);
free (THREAD_SELF->tls_state.strerror_l_buf);
}
#endif