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https://sourceware.org/git/glibc.git
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217fc747ff
entry for static tls deallocation fix. * sysdeps/alpha/tls.h (dtv_t): Change pointer type to be struct which also contains information whether the memory pointed to is static TLS or not, include <stdbool.h>. * sysdeps/i386/tls.h: Likewise. * sysdeps/ia64/tls.h: Likewise. * sysdeps/powerpc/tls.h: Likewise. * sysdeps/s390/tls.h: Likewise. * sysdeps/sh/tls.h: Likewise. * sysdeps/sparc/tls.h: Likewise. * sysdeps/x86_64/tls.h: Likewise.
147 lines
3.9 KiB
C
147 lines
3.9 KiB
C
/* Definitions for thread-local data handling. linuxthreads/IA-64 version.
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Copyright (C) 2002, 2003, 2004, 2005 Free Software Foundation, Inc.
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This file is part of the GNU C Library.
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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, write to the Free
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Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
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02111-1307 USA. */
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#ifndef _TLS_H
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#define _TLS_H
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#ifndef __ASSEMBLER__
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# include <dl-sysdep.h>
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# include <pt-machine.h>
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# include <stdbool.h>
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# include <stddef.h>
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/* Type for the dtv. */
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typedef union dtv
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{
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size_t counter;
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struct
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{
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void *val;
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bool is_static;
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} pointer;
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} dtv_t;
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#else /* __ASSEMBLER__ */
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# include <tcb-offsets.h>
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#endif /* __ASSEMBLER__ */
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#ifdef HAVE_TLS_SUPPORT
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/* Signal that TLS support is available. */
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# define USE_TLS 1
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# ifndef __ASSEMBLER__
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typedef struct
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{
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dtv_t *dtv;
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void *private;
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} tcbhead_t;
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/* This is the size of the initial TCB. */
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# define TLS_INIT_TCB_SIZE sizeof (tcbhead_t)
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/* Alignment requirements for the initial TCB. */
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# define TLS_INIT_TCB_ALIGN __alignof__ (tcbhead_t)
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/* This is the size of the TCB. */
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# define TLS_TCB_SIZE sizeof (tcbhead_t)
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/* This is the size we need before TCB. */
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# define TLS_PRE_TCB_SIZE sizeof (struct _pthread_descr_struct)
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/* Alignment requirements for the TCB. */
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# define TLS_TCB_ALIGN __alignof__ (struct _pthread_descr_struct)
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/* The DTV is allocated at the TP; the TCB is placed elsewhere. */
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# define TLS_DTV_AT_TP 1
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/* Install the dtv pointer. The pointer passed is to the element with
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index -1 which contain the length. */
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# define INSTALL_DTV(tcbp, dtvp) \
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((tcbhead_t *) (tcbp))->dtv = (dtvp) + 1
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/* Install new dtv for current thread. */
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# define INSTALL_NEW_DTV(DTV) \
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(((tcbhead_t *)__thread_self)->dtv = (DTV))
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/* Return dtv of given thread descriptor. */
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# define GET_DTV(tcbp) \
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(((tcbhead_t *) (tcbp))->dtv)
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#if defined NEED_DL_SYSINFO
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# define INIT_SYSINFO \
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(((tcbhead_t *) __thread_self)->private = (void *) GLRO(dl_sysinfo))
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#else
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# define INIT_SYSINFO 0
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#endif
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/* Code to initially initialize the thread pointer. This might need
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special attention since 'errno' is not yet available and if the
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operation can cause a failure 'errno' must not be touched. */
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# define TLS_INIT_TP(tcbp, secondcall) \
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(__thread_self = (__typeof (__thread_self)) (tcbp), INIT_SYSINFO, NULL)
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/* Return the address of the dtv for the current thread. */
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# define THREAD_DTV() \
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(((tcbhead_t *)__thread_self)->dtv)
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/* Return the thread descriptor for the current thread. */
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# undef THREAD_SELF
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# define THREAD_SELF (__thread_self - 1)
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# undef INIT_THREAD_SELF
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# define INIT_THREAD_SELF(descr, nr) \
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(__thread_self = (struct _pthread_descr_struct *)(descr) + 1)
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# define TLS_MULTIPLE_THREADS_IN_TCB 1
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/* Get the thread descriptor definition. */
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# include <linuxthreads/descr.h>
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# endif
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#else
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# ifndef __ASSEMBLER__
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typedef struct
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{
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void *tcb;
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dtv_t *dtv;
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void *self;
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int multiple_threads;
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} tcbhead_t;
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/* Get the thread descriptor definition. */
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# include <linuxthreads/descr.h>
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# define NONTLS_INIT_TP \
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do { \
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static const tcbhead_t nontls_init_tp = { .multiple_threads = 0 }; \
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__thread_self = (__typeof (__thread_self)) &nontls_init_tp; \
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} while (0)
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#endif
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#endif /* USE_TLS */
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#endif /* tls.h */
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