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8a26ad2ab7
All binaries use TLS and thus need a properly set up TCB, so we can simply return its address directly, instead of forwarding to the libpthread implementation from libc. For versioned symbols, the dynamic linker checks that the soname matches the name supplied by the link editor, so a compatibility symbol in libpthread is needed. To avoid linking against the libpthread function in all cases, we would have to bump the symbol version of libpthread in libc.so and supply a compat symbol. This commit does not do that because the function implementation is so small, so the overhead by two active copies of the same function might well be smaller than the increase in symbol table size.
117 lines
5.2 KiB
C
117 lines
5.2 KiB
C
/* Copyright (C) 2003-2017 Free Software Foundation, Inc.
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This file is part of the GNU C Library.
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Contributed by Ulrich Drepper <drepper@redhat.com>, 2003.
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The GNU C Library is free software; you can redistribute it and/or
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modify it under the terms of the GNU Lesser General Public
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License as published by the Free Software Foundation; either
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version 2.1 of the License, or (at your option) any later version.
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The GNU C Library is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public
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License along with the GNU C Library; if not, see
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<http://www.gnu.org/licenses/>. */
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#ifndef _PTHREAD_FUNCTIONS_H
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#define _PTHREAD_FUNCTIONS_H 1
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#include <pthread.h>
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#include <setjmp.h>
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#include <internaltypes.h>
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#include <sysdep.h>
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struct xid_command;
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/* Data type shared with libc. The libc uses it to pass on calls to
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the thread functions. */
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struct pthread_functions
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{
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int (*ptr_pthread_attr_destroy) (pthread_attr_t *);
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int (*ptr___pthread_attr_init_2_0) (pthread_attr_t *);
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int (*ptr___pthread_attr_init_2_1) (pthread_attr_t *);
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int (*ptr_pthread_attr_getdetachstate) (const pthread_attr_t *, int *);
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int (*ptr_pthread_attr_setdetachstate) (pthread_attr_t *, int);
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int (*ptr_pthread_attr_getinheritsched) (const pthread_attr_t *, int *);
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int (*ptr_pthread_attr_setinheritsched) (pthread_attr_t *, int);
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int (*ptr_pthread_attr_getschedparam) (const pthread_attr_t *,
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struct sched_param *);
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int (*ptr_pthread_attr_setschedparam) (pthread_attr_t *,
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const struct sched_param *);
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int (*ptr_pthread_attr_getschedpolicy) (const pthread_attr_t *, int *);
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int (*ptr_pthread_attr_setschedpolicy) (pthread_attr_t *, int);
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int (*ptr_pthread_attr_getscope) (const pthread_attr_t *, int *);
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int (*ptr_pthread_attr_setscope) (pthread_attr_t *, int);
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int (*ptr_pthread_condattr_destroy) (pthread_condattr_t *);
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int (*ptr_pthread_condattr_init) (pthread_condattr_t *);
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int (*ptr___pthread_cond_broadcast) (pthread_cond_t *);
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int (*ptr___pthread_cond_destroy) (pthread_cond_t *);
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int (*ptr___pthread_cond_init) (pthread_cond_t *,
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const pthread_condattr_t *);
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int (*ptr___pthread_cond_signal) (pthread_cond_t *);
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int (*ptr___pthread_cond_wait) (pthread_cond_t *, pthread_mutex_t *);
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int (*ptr___pthread_cond_timedwait) (pthread_cond_t *, pthread_mutex_t *,
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const struct timespec *);
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int (*ptr___pthread_cond_broadcast_2_0) (pthread_cond_2_0_t *);
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int (*ptr___pthread_cond_destroy_2_0) (pthread_cond_2_0_t *);
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int (*ptr___pthread_cond_init_2_0) (pthread_cond_2_0_t *,
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const pthread_condattr_t *);
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int (*ptr___pthread_cond_signal_2_0) (pthread_cond_2_0_t *);
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int (*ptr___pthread_cond_wait_2_0) (pthread_cond_2_0_t *, pthread_mutex_t *);
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int (*ptr___pthread_cond_timedwait_2_0) (pthread_cond_2_0_t *,
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pthread_mutex_t *,
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const struct timespec *);
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int (*ptr_pthread_equal) (pthread_t, pthread_t);
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void (*ptr___pthread_exit) (void *) __attribute__ ((__noreturn__));
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int (*ptr_pthread_getschedparam) (pthread_t, int *, struct sched_param *);
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int (*ptr_pthread_setschedparam) (pthread_t, int,
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const struct sched_param *);
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int (*ptr_pthread_mutex_destroy) (pthread_mutex_t *);
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int (*ptr_pthread_mutex_init) (pthread_mutex_t *,
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const pthread_mutexattr_t *);
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int (*ptr_pthread_mutex_lock) (pthread_mutex_t *);
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int (*ptr_pthread_mutex_unlock) (pthread_mutex_t *);
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int (*ptr___pthread_setcancelstate) (int, int *);
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int (*ptr_pthread_setcanceltype) (int, int *);
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void (*ptr___pthread_cleanup_upto) (__jmp_buf, char *);
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int (*ptr___pthread_once) (pthread_once_t *, void (*) (void));
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int (*ptr___pthread_rwlock_rdlock) (pthread_rwlock_t *);
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int (*ptr___pthread_rwlock_wrlock) (pthread_rwlock_t *);
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int (*ptr___pthread_rwlock_unlock) (pthread_rwlock_t *);
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int (*ptr___pthread_key_create) (pthread_key_t *, void (*) (void *));
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void *(*ptr___pthread_getspecific) (pthread_key_t);
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int (*ptr___pthread_setspecific) (pthread_key_t, const void *);
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void (*ptr__pthread_cleanup_push_defer) (struct _pthread_cleanup_buffer *,
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void (*) (void *), void *);
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void (*ptr__pthread_cleanup_pop_restore) (struct _pthread_cleanup_buffer *,
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int);
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#define HAVE_PTR_NTHREADS
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unsigned int *ptr_nthreads;
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void (*ptr___pthread_unwind) (__pthread_unwind_buf_t *)
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__attribute ((noreturn)) __cleanup_fct_attribute;
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void (*ptr__nptl_deallocate_tsd) (void);
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int (*ptr__nptl_setxid) (struct xid_command *);
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void (*ptr_freeres) (void);
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void (*ptr_set_robust) (struct pthread *);
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};
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/* Variable in libc.so. */
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extern struct pthread_functions __libc_pthread_functions attribute_hidden;
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extern int __libc_pthread_functions_init attribute_hidden;
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#ifdef PTR_DEMANGLE
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# define PTHFCT_CALL(fct, params) \
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({ __typeof (__libc_pthread_functions.fct) __p; \
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__p = __libc_pthread_functions.fct; \
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PTR_DEMANGLE (__p); \
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__p params; })
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#else
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# define PTHFCT_CALL(fct, params) \
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__libc_pthread_functions.fct params
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#endif
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#endif /* pthread-functions.h */
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