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Optimize __libc_tsd_* thread variable access 

These variables are not exported, and libc.so TLS is initial-exec
anyway.  Declare these variables as hidden and use the initial-exec
TLS model.

Reviewed-by: Frédéric Bérat <fberat@redhat.com>
This commit is contained in:
Florian Weimer 2025-05-16 19:53:09 +02:00
parent 10a66a8e42
commit a894f04d87
3 changed files with 10 additions and 5 deletions
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9
include/ctype.h
View File

@ -29,9 +29,12 @@ libc_hidden_proto (toupper)
# define CTYPE_EXTERN_INLINE extern inline
# endif
extern __thread const uint16_t * __libc_tsd_CTYPE_B;
extern __thread const int32_t * __libc_tsd_CTYPE_TOUPPER;
extern __thread const int32_t * __libc_tsd_CTYPE_TOLOWER;
extern __thread const uint16_t * __libc_tsd_CTYPE_B
attribute_hidden attribute_tls_model_ie;
extern __thread const int32_t * __libc_tsd_CTYPE_TOUPPER
attribute_hidden attribute_tls_model_ie;
extern __thread const int32_t * __libc_tsd_CTYPE_TOLOWER
attribute_hidden attribute_tls_model_ie;
CTYPE_EXTERN_INLINE const uint16_t ** __attribute__ ((const))

3
include/rpc/rpc.h
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@ -45,7 +45,8 @@ extern void __rpc_thread_key_cleanup (void) attribute_hidden;
extern void __rpc_thread_destroy (void) attribute_hidden;
extern __thread struct rpc_thread_variables *__libc_tsd_RPC_VARS;
extern __thread struct rpc_thread_variables *__libc_tsd_RPC_VARS
attribute_hidden attribute_tls_model_ie;
#define RPC_THREAD_VARIABLE(x) (__rpc_thread_variables()->x)

3
locale/localeinfo.h
View File

@ -237,7 +237,8 @@ extern struct __locale_struct _nl_global_locale attribute_hidden;
/* This fetches the thread-local locale_t pointer, either one set with
uselocale or &_nl_global_locale. */
#define _NL_CURRENT_LOCALE __libc_tsd_LOCALE
extern __thread locale_t __libc_tsd_LOCALE;
extern __thread locale_t __libc_tsd_LOCALE
attribute_hidden attribute_tls_model_ie;
/* For static linking it is desireable to avoid always linking in the code
and data for every category when we can tell at link time that they are