diff options
author | Ulrich Drepper <drepper@redhat.com> | 2003-06-15 21:22:26 +0000 |
---|---|---|
committer | Ulrich Drepper <drepper@redhat.com> | 2003-06-15 21:22:26 +0000 |
commit | 7a1147946ecd5fe962e2959afe69c25c7a553672 (patch) | |
tree | a6ffd9a6c377d19c531d24e4ac5f9e820a14b72e /nptl | |
parent | 1fde494e69792603263bdf85819831f00d29cee4 (diff) | |
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Update.
2003-06-15 Ulrich Drepper <drepper@redhat.com>
Fix cancellation point handling wrt exception based cleanup.
* io/Makefile: Compile fcntl.c, poll.c, and lockf.c with exceptions.
* misc/Makefile: Compile pselect.c, readv.c, writev.c, and usleep.c
with exceptions.
* posix/Makefile: Compile pread.c, pread64.c, pwrite.c, pwrite64.c,
sleep.c, wait.c, waitid.c, and waitpid.c with exceptions.
* rt/Makefile: Compile aio_suspend.c and clock_nanosleep.c with
exceptions.
* signal/Makefile: Compile sigpause.c, sigsuspend.c, sigtimedwait.c,
sigwait.c, and sigwaitinfo.c with exceptions.
* stdlib/Makefile: Compile system.c with exceptions.
* sysvipc/Makefile: Compile msgrcv.c and msgsnd.c with exceptions.
* termios/Makefile: Compile tcdrain.c with exceptions.
* sysdeps/generic/lockf.c: Add comment explaining the cancellation
situation.
* sysdeps/generic/pselect.c: Likewise.
* sysdeps/posix/sigpause.c: Likewise.
* sysdeps/posix/system.c: Likewise.
* sysdeps/posix/waitid.c: Likewise.
* sysdeps/unix/sysv/linux/sleep.c: Likewise.
* sysdeps/unix/sysv/linux/usleep.c: Likewise.
* sysdeps/unix/sysv/linux/i386/sysdep.h: Major rewrite of
INTERNAL_SYSCALL to not use push inside asm statement so that
unwind info is correct around the syscall.
* sysdeps/unix/clock_nanosleep.c: Add cancellation support.
* sysdeps/unix/sysv/linux/clock_nanosleep.c: Likewise.
Diffstat (limited to 'nptl')
-rw-r--r-- | nptl/ChangeLog | 22 | ||||
-rw-r--r-- | nptl/sysdeps/pthread/Makefile | 3 | ||||
-rw-r--r-- | nptl/sysdeps/pthread/librt-cancellation.c | 122 | ||||
-rw-r--r-- | nptl/sysdeps/unix/sysv/linux/i386/sysdep-cancel.h | 2 | ||||
-rw-r--r-- | nptl/sysdeps/unix/sysv/linux/ia64/sysdep-cancel.h | 2 | ||||
-rw-r--r-- | nptl/sysdeps/unix/sysv/linux/powerpc/powerpc32/sysdep-cancel.h | 2 | ||||
-rw-r--r-- | nptl/sysdeps/unix/sysv/linux/powerpc/powerpc64/sysdep-cancel.h | 2 | ||||
-rw-r--r-- | nptl/sysdeps/unix/sysv/linux/s390/s390-32/sysdep-cancel.h | 2 | ||||
-rw-r--r-- | nptl/sysdeps/unix/sysv/linux/s390/s390-64/sysdep-cancel.h | 2 | ||||
-rw-r--r-- | nptl/sysdeps/unix/sysv/linux/sh/sysdep-cancel.h | 2 | ||||
-rw-r--r-- | nptl/sysdeps/unix/sysv/linux/timer_create.c | 2 | ||||
-rw-r--r-- | nptl/sysdeps/unix/sysv/linux/x86_64/sysdep-cancel.h | 2 |
12 files changed, 156 insertions, 9 deletions
diff --git a/nptl/ChangeLog b/nptl/ChangeLog index 7261b085d1..47a0dd8ff3 100644 --- a/nptl/ChangeLog +++ b/nptl/ChangeLog @@ -1,3 +1,25 @@ +2003-06-15 Ulrich Drepper <drepper@redhat.com> + + * pthreadP.h (LIBC_CANCEL_ASYNC): Also define for librt. + (LIBC_CANCEL_RESET): Likewise. + Declare __librt_enable_asynccancel and __librt_disable_asynccancel. + * sysdeps/pthread/Makefile (librt-sysdep_routines): Add + librt-cancellation. + (CFLAGS-libcrt-cancellation.c): Define. + * sysdeps/pthread/librt-cancellation.c: New file. + * sysdeps/unix/sysv/linux/i386/sysdep-cancel.h: Define all the nice + macros also when compiling librt. + * sysdeps/unix/sysv/linux/ia64/sysdep-cancel.h: Likewise. + * sysdeps/unix/sysv/linux/powerpc/powerpc32/sysdep-cancel.h: Likewise. + * sysdeps/unix/sysv/linux/powerpc/powerpc64/sysdep-cancel.h: Likewise. + * sysdeps/unix/sysv/linux/s390/s390-32/sysdep-cancel.h: Likewise. + * sysdeps/unix/sysv/linux/s390/s390-64/sysdep-cancel.h: Likewise. + * sysdeps/unix/sysv/linux/sh/sysdep-cancel.h: Likewise. + * sysdeps/unix/sysv/linux/x86_64/sysdep-cancel.h: Likewise. + + * sysdeps/unix/sysv/linux/timer_create.c: Add prototype for + compat_timer_create. + 2003-06-14 Ulrich Drepper <drepper@redhat.com> * sysdeps/pthread/posix-timer.h (timespec_compare): Always inline. diff --git a/nptl/sysdeps/pthread/Makefile b/nptl/sysdeps/pthread/Makefile index 1d248bf720..58cfbb38ef 100644 --- a/nptl/sysdeps/pthread/Makefile +++ b/nptl/sysdeps/pthread/Makefile @@ -26,8 +26,9 @@ libpthread-sysdep_routines += errno-loc endif ifeq ($(subdir),rt) -librt-sysdep_routines += timer_routines +librt-sysdep_routines += timer_routines librt-cancellation CPPFLAGS-timer_routines.c = -I../nptl +CFLAGS-librt-cancellation.c += -fexceptions -fasynchronous-unwind-tables ifeq (yes,$(build-shared)) $(objpfx)tst-timer: $(objpfx)librt.so $(shared-thread-library) diff --git a/nptl/sysdeps/pthread/librt-cancellation.c b/nptl/sysdeps/pthread/librt-cancellation.c new file mode 100644 index 0000000000..5f530ed712 --- /dev/null +++ b/nptl/sysdeps/pthread/librt-cancellation.c @@ -0,0 +1,122 @@ +/* Copyright (C) 2002, 2003 Free Software Foundation, Inc. + This file is part of the GNU C Library. + Contributed by Ulrich Drepper <drepper@redhat.com>, 2002. + + 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; if not, write to the Free + Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA + 02111-1307 USA. */ + +#include <setjmp.h> +#include <signal.h> +#include <stdlib.h> +#include "pthreadP.h" +#include "atomic.h" + + +#ifdef IS_IN_librt + +/* The next two functions are similar to pthread_setcanceltype() but + more specialized for the use in the cancelable functions like write(). + They do not need to check parameters etc. */ +int +attribute_hidden +__librt_enable_asynccancel (void) +{ + struct pthread *self = THREAD_SELF; + int oldval = THREAD_GETMEM (self, cancelhandling); + + while (1) + { + int newval = oldval | CANCELTYPE_BITMASK; + + if (__builtin_expect ((oldval & CANCELED_BITMASK) != 0, 0)) + { + /* If we are already exiting stop right here. */ + if ((oldval & EXITING_BITMASK) != 0) + break; + + int curval = THREAD_ATOMIC_CMPXCHG_VAL (self, cancelhandling, + newval, oldval); + if (__builtin_expect (curval != oldval, 0)) + { + /* Somebody else modified the word, try again. */ + oldval = curval; + continue; + } + + THREAD_SETMEM (self, result, PTHREAD_CANCELED); + + __do_cancel (); + + /* NOTREACHED */ + } + + int curval = THREAD_ATOMIC_CMPXCHG_VAL (self, cancelhandling, newval, + oldval); + if (__builtin_expect (curval == oldval, 1)) + break; + + /* Prepare the next round. */ + oldval = curval; + } + + return oldval; +} + + +void +internal_function attribute_hidden +__librt_disable_asynccancel (int oldtype) +{ + /* If asynchronous cancellation was enabled before we do not have + anything to do. */ + if (oldtype & CANCELTYPE_BITMASK) + return; + + struct pthread *self = THREAD_SELF; + int oldval = THREAD_GETMEM (self, cancelhandling); + + while (1) + { + int newval = oldval & ~CANCELTYPE_BITMASK; + + if (newval == oldval) + break; + + int curval = THREAD_ATOMIC_CMPXCHG_VAL (self, cancelhandling, newval, + oldval); + if (__builtin_expect (curval == oldval, 1)) + break; + + /* Prepare the next round. */ + oldval = curval; + } +} + + +/* XXX Hack ahead. In librt we currently do not have access to a + function equivalent to __pthread_unwind. Therefore we just raise a + signal. */ +void +attribute_hidden +__pthread_unwind (__pthread_unwind_buf_t *buf) +{ + INTERNAL_SYSCALL_DECL (err); + while (1) + INTERNAL_SYSCALL (tkill, err, 2, THREAD_GETMEM (THREAD_SELF, tid), + SIGCANCEL); +} + + +#endif diff --git a/nptl/sysdeps/unix/sysv/linux/i386/sysdep-cancel.h b/nptl/sysdeps/unix/sysv/linux/i386/sysdep-cancel.h index 22fdc9421b..e4df0ae2df 100644 --- a/nptl/sysdeps/unix/sysv/linux/i386/sysdep-cancel.h +++ b/nptl/sysdeps/unix/sysv/linux/i386/sysdep-cancel.h @@ -23,7 +23,7 @@ # include <nptl/pthreadP.h> #endif -#if !defined NOT_IN_libc || defined IS_IN_libpthread +#if !defined NOT_IN_libc || defined IS_IN_libpthread || defined IS_IN_librt # undef PSEUDO # define PSEUDO(name, syscall_name, args) \ diff --git a/nptl/sysdeps/unix/sysv/linux/ia64/sysdep-cancel.h b/nptl/sysdeps/unix/sysv/linux/ia64/sysdep-cancel.h index 667abce340..cf116a7885 100644 --- a/nptl/sysdeps/unix/sysv/linux/ia64/sysdep-cancel.h +++ b/nptl/sysdeps/unix/sysv/linux/ia64/sysdep-cancel.h @@ -23,7 +23,7 @@ # include <nptl/pthreadP.h> #endif -#if !defined NOT_IN_libc || defined IS_IN_libpthread +#if !defined NOT_IN_libc || defined IS_IN_libpthread || defined IS_IN_librt # undef PSEUDO # define PSEUDO(name, syscall_name, args) \ diff --git a/nptl/sysdeps/unix/sysv/linux/powerpc/powerpc32/sysdep-cancel.h b/nptl/sysdeps/unix/sysv/linux/powerpc/powerpc32/sysdep-cancel.h index d256f8d8b2..0f4401203a 100644 --- a/nptl/sysdeps/unix/sysv/linux/powerpc/powerpc32/sysdep-cancel.h +++ b/nptl/sysdeps/unix/sysv/linux/powerpc/powerpc32/sysdep-cancel.h @@ -24,7 +24,7 @@ # include <nptl/pthreadP.h> #endif -#if !defined NOT_IN_libc || defined IS_IN_libpthread +#if !defined NOT_IN_libc || defined IS_IN_libpthread || defined IS_IN_librt # undef PSEUDO # define PSEUDO(name, syscall_name, args) \ diff --git a/nptl/sysdeps/unix/sysv/linux/powerpc/powerpc64/sysdep-cancel.h b/nptl/sysdeps/unix/sysv/linux/powerpc/powerpc64/sysdep-cancel.h index 5483586c7b..09a612ee25 100644 --- a/nptl/sysdeps/unix/sysv/linux/powerpc/powerpc64/sysdep-cancel.h +++ b/nptl/sysdeps/unix/sysv/linux/powerpc/powerpc64/sysdep-cancel.h @@ -24,7 +24,7 @@ # include <nptl/pthreadP.h> #endif -#if !defined NOT_IN_libc || defined IS_IN_libpthread +#if !defined NOT_IN_libc || defined IS_IN_libpthread || defined IS_IN_librt # undef PSEUDO # define PSEUDO(name, syscall_name, args) \ diff --git a/nptl/sysdeps/unix/sysv/linux/s390/s390-32/sysdep-cancel.h b/nptl/sysdeps/unix/sysv/linux/s390/s390-32/sysdep-cancel.h index 4681395263..613a5590db 100644 --- a/nptl/sysdeps/unix/sysv/linux/s390/s390-32/sysdep-cancel.h +++ b/nptl/sysdeps/unix/sysv/linux/s390/s390-32/sysdep-cancel.h @@ -23,7 +23,7 @@ # include <nptl/pthreadP.h> #endif -#if !defined NOT_IN_libc || defined IS_IN_libpthread +#if !defined NOT_IN_libc || defined IS_IN_libpthread || defined IS_IN_librt # undef PSEUDO # define PSEUDO(name, syscall_name, args) \ diff --git a/nptl/sysdeps/unix/sysv/linux/s390/s390-64/sysdep-cancel.h b/nptl/sysdeps/unix/sysv/linux/s390/s390-64/sysdep-cancel.h index c07c0442ea..0c650bff23 100644 --- a/nptl/sysdeps/unix/sysv/linux/s390/s390-64/sysdep-cancel.h +++ b/nptl/sysdeps/unix/sysv/linux/s390/s390-64/sysdep-cancel.h @@ -23,7 +23,7 @@ # include <nptl/pthreadP.h> #endif -#if !defined NOT_IN_libc || defined IS_IN_libpthread +#if !defined NOT_IN_libc || defined IS_IN_libpthread || defined IS_IN_librt # undef PSEUDO # define PSEUDO(name, syscall_name, args) \ diff --git a/nptl/sysdeps/unix/sysv/linux/sh/sysdep-cancel.h b/nptl/sysdeps/unix/sysv/linux/sh/sysdep-cancel.h index 16f8ad5e0f..b7dcfc8c43 100644 --- a/nptl/sysdeps/unix/sysv/linux/sh/sysdep-cancel.h +++ b/nptl/sysdeps/unix/sysv/linux/sh/sysdep-cancel.h @@ -22,7 +22,7 @@ # include <nptl/pthreadP.h> #endif -#if !defined NOT_IN_libc || defined IS_IN_libpthread +#if !defined NOT_IN_libc || defined IS_IN_libpthread || defined IS_IN_librt # define _IMM12 #-12 # define _IMM16 #-16 diff --git a/nptl/sysdeps/unix/sysv/linux/timer_create.c b/nptl/sysdeps/unix/sysv/linux/timer_create.c index 915fa812e1..ee026649a3 100644 --- a/nptl/sysdeps/unix/sysv/linux/timer_create.c +++ b/nptl/sysdeps/unix/sysv/linux/timer_create.c @@ -32,6 +32,8 @@ #ifdef __NR_timer_create # ifndef __ASSUME_POSIX_TIMERS +static int compat_timer_create (clockid_t clock_id, struct sigevent *evp, + timer_t *timerid); # define timer_create static compat_timer_create # include <nptl/sysdeps/pthread/timer_create.c> # undef timer_create diff --git a/nptl/sysdeps/unix/sysv/linux/x86_64/sysdep-cancel.h b/nptl/sysdeps/unix/sysv/linux/x86_64/sysdep-cancel.h index 8173b39581..5e85376049 100644 --- a/nptl/sysdeps/unix/sysv/linux/x86_64/sysdep-cancel.h +++ b/nptl/sysdeps/unix/sysv/linux/x86_64/sysdep-cancel.h @@ -23,7 +23,7 @@ # include <nptl/pthreadP.h> #endif -#if !defined NOT_IN_libc || defined IS_IN_libpthread +#if !defined NOT_IN_libc || defined IS_IN_libpthread || defined IS_IN_librt # undef PSEUDO # define PSEUDO(name, syscall_name, args) \ |