glibc/sysdeps/unix/sysv/linux/arm/nptl/unwind-forcedunwind.c
Daniel Jacobowitz 8323b1abc6 * sysdeps/arm/nptl/tls.h (THREAD_GSCOPE_RESET_FLAG): Use
lll_private_futex_wake.
	* sysdeps/unix/sysv/linux/arm/check_pf.c: Update from generic version.
	* sysdeps/unix/sysv/linux/arm/eabi/nptl/unwind-forcedunwind.c
	(pthread_cancel_init): Add noinline and barriers.
	* sysdeps/unix/sysv/linux/arm/nptl/lowlevellock.c
	(__lll_timedlock_wait): Update call to lll_futex_timed_wait.
	(__lll_timedwait_tid): Likewise.
	* sysdeps/unix/sysv/linux/arm/nptl/lowlevellock.h (LLL_PRIVATE,
	LLL_SHARED): Define.
	(lll_futex_wait): Use lll_futex_timed_wait.
	(lll_futex_timed_wait, lll_futex_wake, lll_futex_wake_unlock): Take a
	PRIVATE argument.
	(lll_private_futex_wait, lll_private_futex_timed_wait,
	lll_private_futex_wake): New.
	(lll_robust_mutex_dead,  __lll_mutex_lock, __lll_mutex_cond_lock,
	__lll_mutex_unlock, __lll_robust_mutex_unlock,
	__lll_mutex_unlock_force, lll_wait_tid): Update calls.
	* sysdeps/unix/sysv/linux/arm/nptl/pthread_once.c (clear_once_control,
	__pthread_once): Use private futexes.
	* sysdeps/unix/sysv/linux/arm/nptl/unwind-forcedunwind.c
	(pthread_cancel_init): Add noinline and barriers.

	* sysdeps/unix/sysv/aix/bits/fcntl.h,
	sysdeps/unix/sysv/linux/am33/bits/fcntl.h,
	sysdeps/unix/sysv/linux/arm/bits/fcntl.h,
	sysdeps/unix/sysv/linux/cris/bits/fcntl.h,
	sysdeps/unix/sysv/linux/m68k/bits/fcntl.h,
	sysdeps/unix/sysv/linux/mips/bits/fcntl.h: Comment fix.

	* sysdeps/unix/sysv/linux/arm/nptl/bits/semaphore.h (SEM_VALUE_MAX):
	Delete.
	* sysdeps/unix/sysv/linux/mips/nptl/bits/semaphore.h (SEM_VALUE_MAX):
	Delete.
2007-07-10 13:35:30 +00:00

133 lines
4.3 KiB
C

/* Copyright (C) 2003 Free Software Foundation, Inc.
This file is part of the GNU C Library.
Contributed by Jakub Jelinek <jakub@redhat.com>.
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; see the file COPYING.LIB. If not,
write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
Boston, MA 02111-1307, USA. */
#include <dlfcn.h>
#include <stdio.h>
#include <unwind.h>
#include <pthreadP.h>
static void (*libgcc_s_resume) (struct _Unwind_Exception *exc);
static _Unwind_Reason_Code (*libgcc_s_personality)
(int, _Unwind_Action, _Unwind_Exception_Class, struct _Unwind_Exception *,
struct _Unwind_Context *);
static _Unwind_Reason_Code (*libgcc_s_forcedunwind)
(struct _Unwind_Exception *, _Unwind_Stop_Fn, void *);
static _Unwind_Word (*libgcc_s_getcfa) (struct _Unwind_Context *);
static void (*libgcc_s_sjlj_register) (struct SjLj_Function_Context *);
static void (*libgcc_s_sjlj_unregister) (struct SjLj_Function_Context *);
void
__attribute_noinline__
pthread_cancel_init (void)
{
void *resume, *personality, *forcedunwind, *getcfa;
void *handle;
void *sjlj_register, *sjlj_unregister;
if (__builtin_expect (libgcc_s_getcfa != NULL, 1))
{
/* Force gcc to reload all values. */
asm volatile ("" ::: "memory");
return;
}
handle = __libc_dlopen ("libgcc_s.so.1");
if (handle == NULL
|| (sjlj_register = __libc_dlsym (handle, "_Unwind_SjLj_Register")) == NULL
|| (sjlj_unregister = __libc_dlsym (handle, "_Unwind_SjLj_Unregister")) == NULL
|| (resume = __libc_dlsym (handle, "_Unwind_SjLj_Resume")) == NULL
|| (personality = __libc_dlsym (handle, "__gcc_personality_sj0")) == NULL
|| (forcedunwind = __libc_dlsym (handle, "_Unwind_SjLj_ForcedUnwind"))
== NULL
|| (getcfa = __libc_dlsym (handle, "_Unwind_GetCFA")) == NULL
)
__libc_fatal ("libgcc_s.so.1 must be installed for pthread_cancel to work\n");
libgcc_s_resume = resume;
libgcc_s_personality = personality;
libgcc_s_forcedunwind = forcedunwind;
libgcc_s_sjlj_register = sjlj_register;
libgcc_s_sjlj_unregister = sjlj_unregister;
/* Make sure libgcc_s_getcfa is written last. Otherwise,
pthread_cancel_init might return early even when the pointer the
caller is interested in is not initialized yet. */
atomic_write_barrier ();
libgcc_s_getcfa = getcfa;
}
void
_Unwind_Resume (struct _Unwind_Exception *exc)
{
if (__builtin_expect (libgcc_s_resume == NULL, 0))
pthread_cancel_init ();
libgcc_s_resume (exc);
}
_Unwind_Reason_Code
__gcc_personality_v0 (int version, _Unwind_Action actions,
_Unwind_Exception_Class exception_class,
struct _Unwind_Exception *ue_header,
struct _Unwind_Context *context)
{
if (__builtin_expect (libgcc_s_personality == NULL, 0))
pthread_cancel_init ();
return libgcc_s_personality (version, actions, exception_class,
ue_header, context);
}
_Unwind_Reason_Code
_Unwind_ForcedUnwind (struct _Unwind_Exception *exc, _Unwind_Stop_Fn stop,
void *stop_argument)
{
if (__builtin_expect (libgcc_s_forcedunwind == NULL, 0))
pthread_cancel_init ();
return libgcc_s_forcedunwind (exc, stop, stop_argument);
}
_Unwind_Word
_Unwind_GetCFA (struct _Unwind_Context *context)
{
if (__builtin_expect (libgcc_s_getcfa == NULL, 0))
pthread_cancel_init ();
return libgcc_s_getcfa (context);
}
void
_Unwind_SjLj_Register (struct SjLj_Function_Context *fc)
{
if (__builtin_expect (libgcc_s_sjlj_register == NULL, 0))
pthread_cancel_init ();
libgcc_s_sjlj_register (fc);
}
void
_Unwind_SjLj_Unregister (struct SjLj_Function_Context *fc)
{
if (__builtin_expect (libgcc_s_sjlj_unregister == NULL, 0))
pthread_cancel_init ();
libgcc_s_sjlj_unregister (fc);
}