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* Prefer https to http for gnu.org and fsf.org URLsPaul Eggert2019-09-07487-487/+487
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Also, change sources.redhat.com to sourceware.org. This patch was automatically generated by running the following shell script, which uses GNU sed, and which avoids modifying files imported from upstream: sed -ri ' s,(http|ftp)(://(.*\.)?(gnu|fsf|sourceware)\.org($|[^.]|\.[^a-z])),https\2,g s,(http|ftp)(://(.*\.)?)sources\.redhat\.com($|[^.]|\.[^a-z]),https\2sourceware.org\4,g ' \ $(find $(git ls-files) -prune -type f \ ! -name '*.po' \ ! -name 'ChangeLog*' \ ! -path COPYING ! -path COPYING.LIB \ ! -path manual/fdl-1.3.texi ! -path manual/lgpl-2.1.texi \ ! -path manual/texinfo.tex ! -path scripts/config.guess \ ! -path scripts/config.sub ! -path scripts/install-sh \ ! -path scripts/mkinstalldirs ! -path scripts/move-if-change \ ! -path INSTALL ! -path locale/programs/charmap-kw.h \ ! -path po/libc.pot ! -path sysdeps/gnu/errlist.c \ ! '(' -name configure \ -execdir test -f configure.ac -o -f configure.in ';' ')' \ ! '(' -name preconfigure \ -execdir test -f preconfigure.ac ';' ')' \ -print) and then by running 'make dist-prepare' to regenerate files built from the altered files, and then executing the following to cleanup: chmod a+x sysdeps/unix/sysv/linux/riscv/configure # Omit irrelevant whitespace and comment-only changes, # perhaps from a slightly-different Autoconf version. git checkout -f \ sysdeps/csky/configure \ sysdeps/hppa/configure \ sysdeps/riscv/configure \ sysdeps/unix/sysv/linux/csky/configure # Omit changes that caused a pre-commit check to fail like this: # remote: *** error: sysdeps/powerpc/powerpc64/ppc-mcount.S: trailing lines git checkout -f \ sysdeps/powerpc/powerpc64/ppc-mcount.S \ sysdeps/unix/sysv/linux/s390/s390-64/syscall.S # Omit change that caused a pre-commit check to fail like this: # remote: *** error: sysdeps/sparc/sparc64/multiarch/memcpy-ultra3.S: last line does not end in newline git checkout -f sysdeps/sparc/sparc64/multiarch/memcpy-ultra3.S
* nptl: Move pthread_attr_getinheritsched implementation into libcFlorian Weimer2019-08-304-6/+2
| | | | Reviewed-by: Adhemerval Zanella <adhemerval.zanella@linaro.org>
* nptl: Move pthread_attr_setdetachstate implementation into libcFlorian Weimer2019-08-284-7/+2
| | | | Reviewed-by: Adhemerval Zanella <adhemerval.zanella@linaro.org>
* nptl: Move pthread_attr_getdetachstate implementation into libcFlorian Weimer2019-08-164-7/+3
| | | | Reviewed-by: Adhemerval Zanella <adhemerval.zanella@linaro.org>
* nptl: Move pthread_attr_init implementation into libcFlorian Weimer2019-08-155-21/+4
| | | | | Both the original GLIB_2.0 version and the current GLIBC_2.1 version need to be moved.
* nptl: Remove pthread_self compatibility symbol from libpthreadFlorian Weimer2019-08-153-30/+2
| | | | | The symbol is no longer needed because since glibc 2.30, the dynamic loader continues searching for the symbol in libc.
* nptl: Move pthread_attr_destroy implementation into libcFlorian Weimer2019-08-155-7/+5
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* nptl: Move pthread_equal implementation into libcFlorian Weimer2019-08-153-7/+2
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* nptl: Use uintptr_t for address diagnostic in nptl/tst-pthread-getattrFlorian Weimer2019-07-301-8/+9
| | | | | | | | | | | | | | | | | | | | | Recent GCC versions warn about the attempt to return the address of a local variable: tst-pthread-getattr.c: In function ‘allocate_and_test’: tst-pthread-getattr.c:54:10: error: function returns address of local variable [-Werror=return-local-addr] 54 | return mem; | ^~~ In file included from ../include/alloca.h:3, from tst-pthread-getattr.c:26: ../stdlib/alloca.h:35:23: note: declared here 35 | # define alloca(size) __builtin_alloca (size) | ^~~~~~~~~~~~~~~~~~~~~~~ tst-pthread-getattr.c:51:9: note: in expansion of macro ‘alloca’ 51 | mem = alloca ((size_t) (mem - target)); | ^~~~~~ The address itself is used in a check in the caller, so using uintptr_t instead is reasonable.
* nptl: Remove unnecessary forwarding of pthread_cond_clockwait from libcMike Crowe2019-07-182-6/+0
| | | | | | | | | | | | | | | | | | | | In afe4de7d283ebd88157126c5494ce1796194c16e, I added forwarding functions from libc to libpthread for __pthread_cond_clockwait and pthread_cond_clockwait to mirror those for pthread_cond_timedwait. These are unnecessary[1], since these functions aren't (yet) being called from within libc itself. Let's remove them. * nptl/forward.c: Remove unnecessary __pthread_cond_clockwait and pthread_cond_clockwait forwarding functions. There are no internal users, so it is unnecessary to expose these functions in libc.so. * sysdeps/nptl/pthread-functions.h (pthread_functions): Remove unnecessary ptr___pthread_cond_clockwait member. * nptl/nptl-init.c (pthread_functions): Remove assignment of removed member. Reviewed-by: Adhemerval Zanella <adhemerval.zanella@linaro.org> [1] https://sourceware.org/ml/libc-alpha/2017-10/msg00082.html
* nptl: Remove futex_supports_exact_relative_timeoutsMike Crowe2019-07-122-10/+0
| | | | | | | | | | | | | | | | | | The only implementation of futex_supports_exact_relative_timeouts always returns true. Let's remove it and all its callers. * nptl/pthread_cond_wait.c: (__pthread_cond_clockwait): Remove code that is only useful if futex_supports_exact_relative_timeouts () returns false. * nptl/pthread_condattr_setclock.c: (pthread_condattr_setclock): Likewise. * sysdeps/nptl/futex-internal.h: Remove comment about relative timeouts potentially being imprecise since it's no longer true. Remove declaration of futex_supports_exact_relative_timeouts. * sysdeps/unix/sysv/linux/futex-internal.h: Remove implementation of futex_supports_exact_relative_timeouts. Reviewed-by: Adhemerval Zanella <adhemerval.zanella@linaro.org>
* nptl: Add POSIX-proposed pthread_mutex_clocklockMike Crowe2019-07-129-27/+160
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Add POSIX-proposed pthread_mutex_clocklock function that works like pthread_mutex_timedlock but takes a clockid parameter to measure the abstime parameter against. * sysdeps/nptl/pthread.h: Add pthread_mutex_clocklock. * nptl/DESIGN-systemtap-probes.txt: Likewise. * nptl/pthread_mutex_timedlock.c (__pthread_mutex_clocklock_common): Rename from __pthread_mutex_timedlock and add clockid parameter. Pass this parameter to lll_clocklock and lll_clocklock_elision in place of CLOCK_REALTIME. (__pthread_mutex_clocklock): New function to add LIBC_PROBE and validate clockid parameter before calling __pthread_mutex_clocklock_common. (__pthread_mutex_timedlock): New implementation to add LIBC_PROBE and calls __pthread_mutex_clocklock_common passing CLOCK_REALTIME as the clockid. * nptl/Makefile: Add tst-mutex11.c. * nptl/tst-abstime.c (th): Add tests for pthread_mutex_clocklock. * nptl/tst-mutex11.c: New tests for passing invalid and unsupported clockid parameters to pthread_mutex_clocklock. * nptl/tst-mutex5.c (do_test_clock): Rename from do_test and take clockid parameter to indicate which clock to be used. Call pthread_mutex_timedlock or pthread_mutex_clocklock as appropriate. (do_test): Call do_test_clock to separately test pthread_mutex_timedlock, pthread_mutex_clocklock(CLOCK_REALTIME) and pthread_mutex_clocklock(CLOCK_MONOTONIC). * nptl/tst-mutex9.c: Likewise. * nptl/Versions (GLIBC_2.30): Add pthread_mutex_clocklock. * sysdeps/unix/sysv/linux/aarch64/libpthread.abilist (GLIBC_2.30): Likewise. * sysdeps/unix/sysv/linux/alpha/libpthread.abilist (GLIBC_2.30): Likewise. * sysdeps/unix/sysv/linux/arm/libpthread.abilist (GLIBC_2.30): Likewise. * sysdeps/unix/sysv/linux/csky/libpthread.abilist (GLIBC_2.30): Likewise. * sysdeps/unix/sysv/linux/hppa/libpthread.abilist (GLIBC_2.30): Likewise. * sysdeps/unix/sysv/linux/i386/libpthread.abilist (GLIBC_2.30): Likewise. * sysdeps/unix/sysv/linux/ia64/libpthread.abilist (GLIBC_2.30): Likewise. * sysdeps/unix/sysv/linux/m68k/coldfire/libpthread.abilist (GLIBC_2.30): Likewise. * sysdeps/unix/sysv/linux/m68k/m680x0/libpthread.abilist (GLIBC_2.30): Likewise. * sysdeps/unix/sysv/linux/microblaze/libpthread.abilist (GLIBC_2.30): Likewise. * sysdeps/unix/sysv/linux/mips/mips32/libpthread.abilist (GLIBC_2.30): Likewise. * sysdeps/unix/sysv/linux/mips/mips64/libpthread.abilist (GLIBC_2.30): Likewise. * sysdeps/unix/sysv/linux/nios2/libpthread.abilist (GLIBC_2.30): Likewise. * sysdeps/unix/sysv/linux/powerpc/powerpc32/libpthread.abilist (GLIBC_2.30): Likewise. * sysdeps/unix/sysv/linux/powerpc/powerpc64/be/libpthread.abilist (GLIBC_2.30): Likewise. * sysdeps/unix/sysv/linux/powerpc/powerpc64/le/libpthread.abilist (GLIBC_2.30): Likewise. * sysdeps/unix/sysv/linux/riscv/rv64/libpthread.abilist (GLIBC_2.30): Likewise. * sysdeps/unix/sysv/linux/s390/s390-32/libpthread.abilist (GLIBC_2.30): Likewise. * sysdeps/unix/sysv/linux/s390/s390-64/libpthread.abilist (GLIBC_2.30): Likewise. * sysdeps/unix/sysv/linux/sh/libpthread.abilist (GLIBC_2.30): Likewise. * sysdeps/unix/sysv/linux/sparc/sparc32/libpthread.abilist (GLIBC_2.30): Likewise. * sysdeps/unix/sysv/linux/sparc/sparc64/libpthread.abilist (GLIBC_2.30): Likewise. * sysdeps/unix/sysv/linux/x86_64/64/libpthread.abilist (GLIBC_2.30): Likewise. * sysdeps/unix/sysv/linux/x86_64/x32/libpthread.abilist (GLIBC_2.30): Likewise. Reviewed-by: Adhemerval Zanella <adhemerval.zanella@linaro.org>
* nptl: Rename lll_timedlock to lll_clocklock and add clockid parameterMike Crowe2019-07-122-13/+18
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Rename lll_timedlock to lll_clocklock and add clockid parameter to indicate the clock that the abstime parameter should be measured against in preparation for adding pthread_mutex_clocklock. The name change mirrors the naming for the exposed pthread functions: timed => absolute timeout measured against CLOCK_REALTIME (or clock specified by attribute in the case of pthread_cond_timedwait.) clock => absolute timeout measured against clock specified in preceding parameter. * sysdeps/nptl/lowlevellock.h (lll_clocklock): Rename from lll_timedlock and add clockid parameter. (__lll_clocklock): Rename from __lll_timedlock and add clockid parameter. * sysdeps/unix/sysv/linux/sparc/lowlevellock.h (lll_clocklock): Likewise. * nptl/lll_timedlock_wait.c (__lll_clocklock_wait): Rename from __lll_timedlock_wait and add clockid parameter. Use __clock_gettime rather than __gettimeofday so that clockid can be used. This means that conversion from struct timeval is no longer required. * sysdeps/sparc/sparc32/lowlevellock.c (lll_clocklock_wait): Likewise. * sysdeps/sparc/sparc32/lll_timedlock_wait.c: Update comment to refer to __lll_clocklock_wait rather than __lll_timedlock_wait. * nptl/pthread_mutex_timedlock.c (lll_clocklock_elision): Rename from lll_timedlock_elision, add clockid parameter and use meaningful names for other parameters. (__pthread_mutex_timedlock): Pass CLOCK_REALTIME where necessary to lll_clocklock and lll_clocklock_elision. * sysdeps/unix/sysv/linux/powerpc/lowlevellock.h (lll_clocklock_elision): Rename from lll_timedlock_elision and add clockid parameter. (__lll_clocklock_elision): Rename from __lll_timedlock_elision and add clockid parameter. * sysdeps/unix/sysv/linux/s390/lowlevellock.h: Likewise. * sysdeps/unix/sysv/linux/x86/lowlevellock.h: Likewise. * sysdeps/unix/sysv/linux/powerpc/elision-timed.c (__lll_lock_elision): Call __lll_clocklock_elision rather than __lll_timedlock_elision. (EXTRAARG): Add clockid parameter. (LLL_LOCK): Likewise. * sysdeps/unix/sysv/linux/s390/elision-timed.c: Likewise. * sysdeps/unix/sysv/linux/x86/elision-timed.c: Likewise. Reviewed-by: Adhemerval Zanella <adhemerval.zanella@linaro.org>
* nptl: Add POSIX-proposed pthread_rwlock_clockrdlock & pthread_rwlock_clockwrlockMike Crowe2019-07-1214-100/+307
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Add: int pthread_rwlock_clockrdlock (pthread_rwlock_t *rwlock, clockid_t clockid, const struct timespec *abstime) and: int pthread_rwlock_clockwrlock (pthread_rwlock_t *rwlock, clockid_t clockid, const struct timespec *abstime) which behave like pthread_rwlock_timedrdlock and pthread_rwlock_timedwrlock respectively, except they always measure abstime against the supplied clockid. The functions currently support CLOCK_REALTIME and CLOCK_MONOTONIC and return EINVAL if any other clock is specified. * sysdeps/nptl/pthread.h: Add pthread_rwlock_clockrdlock and pthread_wrlock_clockwrlock. * nptl/Makefile: Build pthread_rwlock_clockrdlock.c and pthread_rwlock_clockwrlock.c. * nptl/pthread_rwlock_clockrdlock.c: Implement pthread_rwlock_clockrdlock. * nptl/pthread_rwlock_clockwrlock.c: Implement pthread_rwlock_clockwrlock. * nptl/pthread_rwlock_common.c (__pthread_rwlock_rdlock_full): Add clockid parameter and verify that it indicates a supported clock on entry so that we fail even if it doesn't end up being used. Pass that clock on to futex_abstimed_wait when necessary. (__pthread_rwlock_wrlock_full): Likewise. * nptl/pthread_rwlock_rdlock.c: (__pthread_rwlock_rdlock): Pass CLOCK_REALTIME to __pthread_rwlock_rdlock_full even though it won't be used because there's no timeout. * nptl/pthread_rwlock_wrlock.c (__pthread_rwlock_wrlock): Pass CLOCK_REALTIME to __pthread_rwlock_wrlock_full even though it won't be used because there is no timeout. * nptl/pthread_rwlock_timedrdlock.c (pthread_rwlock_timedrdlock): Pass CLOCK_REALTIME to __pthread_rwlock_rdlock_full since abstime uses that clock. * nptl/pthread_rwlock_timedwrlock.c (pthread_rwlock_timedwrlock): Pass CLOCK_REALTIME to __pthread_rwlock_wrlock_full since abstime uses that clock. * sysdeps/unix/sysv/linux/aarch64/libpthread.abilist (GLIBC_2.30): Likewise. * sysdeps/unix/sysv/linux/alpha/libpthread.abilist (GLIBC_2.30): Likewise. * sysdeps/unix/sysv/linux/arm/libpthread.abilist (GLIBC_2.30): Likewise. * sysdeps/unix/sysv/linux/csky/libpthread.abilist (GLIBC_2.30): Likewise. * sysdeps/unix/sysv/linux/hppa/libpthread.abilist (GLIBC_2.30): Likewise. * sysdeps/unix/sysv/linux/i386/libpthread.abilist (GLIBC_2.30): Likewise. * sysdeps/unix/sysv/linux/ia64/libpthread.abilist (GLIBC_2.30): Likewise. * sysdeps/unix/sysv/linux/m68k/coldfire/libpthread.abilist (GLIBC_2.30): Likewise. * sysdeps/unix/sysv/linux/m68k/m680x0/libpthread.abilist (GLIBC_2.30): Likewise. * sysdeps/unix/sysv/linux/microblaze/libpthread.abilist (GLIBC_2.30): Likewise. * sysdeps/unix/sysv/linux/mips/mips32/libpthread.abilist (GLIBC_2.30): Likewise. * sysdeps/unix/sysv/linux/mips/mips64/libpthread.abilist (GLIBC_2.30): Likewise. * sysdeps/unix/sysv/linux/nios2/libpthread.abilist (GLIBC_2.30): Likewise. * sysdeps/unix/sysv/linux/powerpc/powerpc32/libpthread.abilist (GLIBC_2.30): Likewise. * sysdeps/unix/sysv/linux/powerpc/powerpc64/be/libpthread.abilist (GLIBC_2.30): Likewise. * sysdeps/unix/sysv/linux/powerpc/powerpc64/le/libpthread.abilist (GLIBC_2.30): Likewise. * sysdeps/unix/sysv/linux/riscv/rv64/libpthread.abilist (GLIBC_2.30): Likewise. * sysdeps/unix/sysv/linux/s390/s390-32/libpthread.abilist (GLIBC_2.30): Likewise. * sysdeps/unix/sysv/linux/s390/s390-64/libpthread.abilist (GLIBC_2.30): Likewise. * sysdeps/unix/sysv/linux/sh/libpthread.abilist (GLIBC_2.30): Likewise. * sysdeps/unix/sysv/linux/sparc/sparc32/libpthread.abilist (GLIBC_2.30): Likewise. * sysdeps/unix/sysv/linux/sparc/sparc64/libpthread.abilist (GLIBC_2.30): Likewise. * sysdeps/unix/sysv/linux/x86_64/64/libpthread.abilist (GLIBC_2.30): Likewise. * sysdeps/unix/sysv/linux/x86_64/x32/libpthread.abilist (GLIBC_2.30): Likewise. * nptl/tst-abstime.c (th): Add pthread_rwlock_clockrdlock and pthread_rwlock_clockwrlock timeout tests to match the existing pthread_rwlock_timedrdloock and pthread_rwlock_timedwrlock tests. * nptl/tst-rwlock14.c (do_test): Likewise. * nptl/tst-rwlock6.c Invent verbose_printf macro, and use for ancillary output throughout. (tf): Accept thread_args structure so that rwlock, a clockid and function name can be passed to the thread. (do_test_clock): Rename from do_test. Accept clockid parameter to specify test clock. Use the magic clockid value of CLOCK_USE_TIMEDLOCK to indicate that pthread_rwlock_timedrdlock and pthread_rwlock_timedwrlock should be tested, otherwise pass the specified clockid to pthread_rwlock_clockrdlock and pthread_rwlock_clockwrlock. Use xpthread_create and xpthread_join. (do_test): Call do_test_clock to test each clockid in turn. * nptl/tst-rwlock7.c: Likewise. * nptl/tst-rwlock9.c (writer_thread, reader_thread): Accept thread_args structure so that the (now int) thread number, the clockid and the function name can be passed to the thread. (do_test_clock): Renamed from do_test. Pass the necessary thread_args when creating the reader and writer threads. Use xpthread_create and xpthread_join. (do_test): Call do_test_clock to test each clockid in turn. * manual/threads.texi: Add documentation for pthread_rwlock_clockrdlock and pthread_rwlock_clockwrclock. Reviewed-by: Adhemerval Zanella <adhemerval.zanella@linaro.org>
* nptl: pthread_rwlock: Move timeout validation into _full functionsMike Crowe2019-07-123-20/+20
| | | | | | | | | | | | | | | | | | | | As recommended by the comments in the implementations of pthread_rwlock_timedrdlock and pthread_rwlock_timedwrlock, let's move the timeout validity checks into the corresponding pthread_rwlock_rdlock_full and pthread_rwlock_wrlock_full functions. Since these functions may be called with abstime == NULL, an extra check for that is necessary too. * nptl/pthread_rwlock_common.c (__pthread_rwlock_rdlock_full): Check validity of abstime parameter. (__pthread_rwlock_rwlock_full): Likewise. * nptl/pthread_rwlock_timedrdlock.c * (pthread_rwlock_timedrdlock): Remove check for validity of abstime parameter. * nptl/pthread_rwlock_timedwrlock.c * (pthread_rwlock_timedwrlock): Likewise. Reviewed-by: Adhemerval Zanella <adhemerval.zanella@linaro.org>
* nptl: Add POSIX-proposed pthread_cond_clockwaitMike Crowe2019-07-129-18/+221
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Add: int pthread_cond_clockwait (pthread_cond_t *cond, pthread_mutex_t *mutex, clockid_t clockid, const struct timespec *abstime) which behaves just like pthread_cond_timedwait except it always measures abstime against the supplied clockid. Currently supports CLOCK_REALTIME and CLOCK_MONOTONIC and returns EINVAL if any other clock is specified. Includes feedback from many others. This function was originally proposed[1] as pthread_cond_timedwaitonclock_np, but The Austin Group preferred the new name. * nptl/Makefile: Add tst-cond26 and tst-cond27 * nptl/Versions (GLIBC_2.30): Add pthread_cond_clockwait * sysdeps/nptl/pthread.h: Likewise * nptl/forward.c: Add __pthread_cond_clockwait * nptl/forward.c: Likewise * nptl/pthreadP.h: Likewise * sysdeps/nptl/pthread-functions.h: Likewise * nptl/pthread_cond_wait.c (__pthread_cond_wait_common): Add clockid parameter and comment describing why we don't need to check its value. Use that value when calling futex_abstimed_wait_cancelable rather than reading the clock from the flags. (__pthread_cond_wait): Pass unused clockid parameter. (__pthread_cond_timedwait): Read clock from flags and pass it to __pthread_cond_wait_common. (__pthread_cond_clockwait): Add new function with weak alias from pthread_cond_clockwait. * sysdeps/mach/hurd/i386/libpthread.abilist (GLIBC_2.30): * Likewise. * sysdeps/unix/sysv/linux/aarch64/libpthread.abilist * (GLIBC_2.30): Likewise. * sysdeps/unix/sysv/linux/alpha/libpthread.abilist (GLIBC_2.30): * Likewise. * sysdeps/unix/sysv/linux/arm/libpthread.abilist (GLIBC_2.30): * Likewise. * sysdeps/unix/sysv/linux/csky/libpthread.abilist (GLIBC_2.30): * Likewise. * sysdeps/unix/sysv/linux/hppa/libpthread.abilist (GLIBC_2.30): * Likewise. * sysdeps/unix/sysv/linux/i386/libpthread.abilist (GLIBC_2.30): * Likewise. * sysdeps/unix/sysv/linux/ia64/libpthread.abilist (GLIBC_2.30): * Likewise. * sysdeps/unix/sysv/linux/m68k/coldfire/libpthread.abilist (GLIBC_2.30): Likewise. * sysdeps/unix/sysv/linux/m68k/m680x0/libpthread.abilist (GLIBC_2.30): Likewise. * sysdeps/unix/sysv/linux/microblaze/libpthread.abilist (GLIBC_2.30): Likewise. * sysdeps/unix/sysv/linux/mips/mips32/libpthread.abilist (GLIBC_2.30): Likewise. * sysdeps/unix/sysv/linux/mips/mips64/libpthread.abilist (GLIBC_2.30): Likewise. * sysdeps/unix/sysv/linux/nios2/libpthread.abilist (GLIBC_2.30): * Likewise. * sysdeps/unix/sysv/linux/powerpc/powerpc32/libpthread.abilist (GLIBC_2.30): Likewise. * sysdeps/unix/sysv/linux/powerpc/powerpc64/be/libpthread.abilist (GLIBC_2.30): Likewise. * sysdeps/unix/sysv/linux/powerpc/powerpc64/le/libpthread.abilist (GLIBC_2.30): Likewise. * sysdeps/unix/sysv/linux/riscv/rv64/libpthread.abilist (GLIBC_2.30): Likewise. * sysdeps/unix/sysv/linux/s390/s390-32/libpthread.abilist (GLIBC_2.30): Likewise. * sysdeps/unix/sysv/linux/s390/s390-64/libpthread.abilist (GLIBC_2.30): Likewise. * sysdeps/unix/sysv/linux/sh/libpthread.abilist (GLIBC_2.30): * Likewise. * sysdeps/unix/sysv/linux/sparc/sparc32/libpthread.abilist (GLIBC_2.30): Likewise. * sysdeps/unix/sysv/linux/sparc/sparc64/libpthread.abilist (GLIBC_2.30): Likewise. * sysdeps/unix/sysv/linux/x86_64/64/libpthread.abilist (GLIBC_2.30): Likewise. * sysdeps/unix/sysv/linux/x86_64/x32/libpthread.abilist (GLIBC_2.30): Likewise. * nptl/tst-cond11.c (run_test): Support testing pthread_cond_clockwait too by using a special magic CLOCK_USE_ATTR_CLOCK value to determine whether to call pthread_cond_timedwait or pthread_cond_clockwait. (do_test): Pass CLOCK_USE_ATTR_CLOCK for existing tests, and add new tests using all combinations of CLOCK_MONOTONIC and CLOCK_REALTIME. * ntpl/tst-cond26.c: New test for passing unsupported and * invalid clocks to pthread_cond_clockwait. * nptl/tst-cond27.c: Add test similar to tst-cond5.c, but using struct timespec and pthread_cond_clockwait. * manual/threads.texi: Document pthread_cond_clockwait. The * comment was provided by Carlos O'Donell. [1] https://sourceware.org/ml/libc-alpha/2015-07/msg00193.html Reviewed-by: Adhemerval Zanella <adhemerval.zanella@linaro.org>
* nptl: Add POSIX-proposed sem_clockwaitMike Crowe2019-07-129-20/+193
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Add: int sem_clockwait (sem_t *sem, clockid_t clock, const struct timespec *abstime) which behaves just like sem_timedwait, but measures abstime against the specified clock. Currently supports CLOCK_REALTIME and CLOCK_MONOTONIC and sets errno == EINVAL if any other clock is specified. * nptl/sem_waitcommon.c (do_futex_wait, __new_sem_wait_slow): Add clockid parameters to indicate the clock which abstime should be measured against. * nptl/sem_timedwait.c (sem_timedwait), nptl/sem_wait.c (__new_sem_wait): Pass CLOCK_REALTIME as clockid to __new_sem_wait_slow. * nptl/sem_clockwait.c: New file to implement sem_clockwait based on sem_timedwait.c. * nptl/Makefile: Add sem_clockwait.c source file. Add CFLAGS for sem_clockwait.c to match those used for sem_timedwait.c. * sysdeps/pthread/semaphore.h: Add sem_clockwait. * nptl/Versions (GLIBC_2.30): Likewise. * sysdeps/unix/sysv/linux/aarch64/libpthread.abilist (GLIBC_2.30): Likewise. * sysdeps/unix/sysv/linux/alpha/libpthread.abilist (GLIBC_2.30): Likewise. * sysdeps/unix/sysv/linux/arm/libpthread.abilist (GLIBC_2.30): Likewise. * sysdeps/unix/sysv/linux/csky/libpthread.abilist (GLIBC_2.30): Likewise. * sysdeps/unix/sysv/linux/hppa/libpthread.abilist (GLIBC_2.30): Likewise. * sysdeps/unix/sysv/linux/i386/libpthread.abilist (GLIBC_2.30): Likewise. * sysdeps/unix/sysv/linux/ia64/libpthread.abilist (GLIBC_2.30): Likewise. * sysdeps/unix/sysv/linux/m68k/coldfire/libpthread.abilist (GLIBC_2.30): Likewise. * sysdeps/unix/sysv/linux/m68k/m680x0/libpthread.abilist (GLIBC_2.30): Likewise. * sysdeps/unix/sysv/linux/microblaze/libpthread.abilist (GLIBC_2.30): Likewise. * sysdeps/unix/sysv/linux/mips/mips32/libpthread.abilist (GLIBC_2.30): Likewise. * sysdeps/unix/sysv/linux/mips/mips64/libpthread.abilist (GLIBC_2.30): Likewise. * sysdeps/unix/sysv/linux/nios2/libpthread.abilist (GLIBC_2.30): Likewise. * sysdeps/unix/sysv/linux/powerpc/powerpc32/libpthread.abilist (GLIBC_2.30): Likewise. * sysdeps/unix/sysv/linux/powerpc/powerpc64/be/libpthread.abilist (GLIBC_2.30): Likewise. * sysdeps/unix/sysv/linux/powerpc/powerpc64/le/libpthread.abilist (GLIBC_2.30): Likewise. * sysdeps/unix/sysv/linux/riscv/rv64/libpthread.abilist (GLIBC_2.30): Likewise. * sysdeps/unix/sysv/linux/s390/s390-32/libpthread.abilist (GLIBC_2.30): Likewise. * sysdeps/unix/sysv/linux/s390/s390-64/libpthread.abilist (GLIBC_2.30): Likewise. * sysdeps/unix/sysv/linux/sh/libpthread.abilist (GLIBC_2.30): Likewise. * sysdeps/unix/sysv/linux/sparc/sparc32/libpthread.abilist (GLIBC_2.30): Likewise. * sysdeps/unix/sysv/linux/sparc/sparc64/libpthread.abilist (GLIBC_2.30): Likewise. * sysdeps/unix/sysv/linux/x86_64/64/libpthread.abilist (GLIBC_2.30): Likewise. * sysdeps/unix/sysv/linux/x86_64/x32/libpthread.abilist (GLIBC_2.30): Likewise. * nptl/tst-sem17.c: Add new test for passing invalid clock to sem_clockwait. * nptl/tst-sem13.c, nptl/tst-sem5.c: Modify existing sem_timedwait tests to also test sem_clockwait. * manual/threads.texi: Document sem_clockwait. Reviewed-by: Adhemerval Zanella <adhemerval.zanella@linaro.org>
* nptl: Add clockid parameter to futex timed wait callsMike Crowe2019-07-124-34/+16
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | In preparation for adding POSIX clockwait variants of timedwait functions, add a clockid_t parameter to futex_abstimed_wait functions and pass CLOCK_REALTIME from all callers for the time being. Replace lll_futex_timed_wait_bitset with lll_futex_clock_wait_bitset which takes a clockid_t parameter rather than the magic clockbit. * sysdeps/nptl/lowlevellock-futex.h, sysdeps/unix/sysv/linux/lowlevellock-futex.h: Replace lll_futex_timed_wait_bitset with lll_futex_clock_wait_bitset that takes a clockid rather than a special clockbit. * sysdeps/nptl/lowlevellock-futex.h: Add lll_futex_supported_clockid so that client functions can check whether their clockid parameter is valid even if they don't ultimately end up calling lll_futex_clock_wait_bitset. * sysdeps/nptl/futex-internal.h, sysdeps/unix/sysv/linux/futex-internal.h (futex_abstimed_wait, futex_abstimed_wait_cancelable): Add clockid_t parameter to indicate which clock the absolute time passed should be measured against. Pass that clockid onto lll_futex_clock_wait_bitset. Add invalid clock as reason for returning -EINVAL. * sysdeps/nptl/futex-internal.h, sysdeps/unix/sysv/linux/futex-internal.h: Introduce futex_abstimed_supported_clockid so that client functions can check whether their clockid parameter is valid even if they don't ultimately end up calling futex_abstimed_wait. * nptl/pthread_cond_wait.c (__pthread_cond_wait_common): Remove code to calculate relative timeout for __PTHREAD_COND_CLOCK_MONOTONIC_MASK and just pass CLOCK_MONOTONIC or CLOCK_REALTIME as required to futex_abstimed_wait_cancelable. * nptl/pthread_rwlock_common (__pthread_rwlock_rdlock_full) (__pthread_wrlock_full), nptl/sem_waitcommon (do_futex_wait): Pass additional CLOCK_REALTIME to futex_abstimed_wait_cancelable. * nptl/pthread_mutex_timedlock.c (__pthread_mutex_timedlock): Switch to lll_futex_clock_wait_bitset and pass CLOCK_REALTIME Reviewed-by: Adhemerval Zanella <adhemerval.zanella@linaro.org>
* nptl: Remove vfork IFUNC-based forwarder from libpthread [BZ #20188]Florian Weimer2019-07-024-70/+42
| | | | | | | | | | | | | | | | | | | | | With commit f0b2132b35248c1f4a80f62a2c38cddcc802aa8c ("ld.so: Support moving versioned symbols between sonames [BZ #24741]"), the dynamic linker will find the definition of vfork in libc and binds a vfork reference to that symbol, even if the soname in the version reference says that the symbol should be located in libpthread. As a result, the forwarder (whether it's IFUNC-based or a duplicate of the libc implementation) is no longer necessary. On older architectures, a placeholder symbol is required, to make sure that the GLIBC_2.1.2 symbol version does not go away, or is turned in to a weak symbol definition by the link editor. (The symbol version needs to preserved so that the symbol coverage check in elf/dl-version.c does not fail for old binaries.) mips32 is an outlier: It defined __vfork@@GLIBC_2.2, but the baseline is GLIBC_2.0. Since there are other @@GLIBC_2.2 symbols, the placeholder symbol is not needed there.
* Fix build warnings in nptl/tst-eintr1.cStefan Liebler2019-06-261-3/+2
| | | | | | | | | | | | | | | | | This patch fixes the gcc warnings seen with gcc 9.1 -O3 on s390x: tst-eintr1.c: In function ‘tf1’: tst-eintr1.c:46:1: error: no return statement in function returning non-void [-Werror=return-type] 46 | } | ^ tst-eintr1.c: In function ‘do_test’: tst-eintr1.c:57:17: error: unused variable ‘th’ [-Werror=unused-variable] 57 | pthread_t th = xpthread_create (NULL, tf1, NULL); | ^~ ChangeLog: * nptl/tst-eintr1.c (tf1): Add return statement. (do_test): Remove unused th variable.
* nptl: Convert various tests to use libsupportMike Crowe2019-06-219-409/+117
| | | | | | | | | | | * nptl/eintr.c: Use libsupport. * nptl/tst-eintr1.c: Likewise. * nptl/tst-eintr2.c: Likewise. * nptl/tst-eintr3.c: Likewise. * nptl/tst-eintr4.c: Likewise. * nptl/tst-eintr5.c: Likewise. * nptl/tst-mutex-errorcheck.c: Likewise. * nptl/tst-mutex5.c: Likewise.
* nptl: Add comment to __pthread_get_minstack about external usersFlorian Weimer2019-05-271-0/+8
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* Assume LLL_LOCK_INITIALIZER is 0Adhemerval Zanella2019-05-145-38/+0
| | | | | | | | | | | | | | | | | Since hppa is not an outlier anymore regarding LLL_LOCK_INITIALIZER value, we can now assume it 0 for all architectures. Checked on a build for all major ABIs. * nptl/nptl-init.c (__pthread_initialize_minimal_internal): Remove initialization for LLL_LOCK_INITIALIZER different than 0. * nptl/old_pthread_cond_broadcast.c (__pthread_cond_broadcast_2_0): Assume LLL_LOCK_INITIALIZER being 0. * nptl/old_pthread_cond_signal.c (__pthread_cond_signal_2_0): Likewise. * nptl/old_pthread_cond_timedwait.c (__pthread_cond_timedwait_2_0): Likewise. * nptl/old_pthread_cond_wait.c (__pthread_cond_wait_2_0): Likewise. * sysdeps/nptl/libc-lockP.h (__libc_lock_define_initialized): Likewise.
* Small optimization for lowlevellockAdhemerval Zanella2019-05-141-12/+19
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | This patch optimizes both __lll_lock_wait_private and __lll_lock_wait by issuing only one lll_futex_wait. Since it is defined as an inlined syscall and inlined syscalls are defined using inlined assembly the compiler usually can not see both calls are equal and optimize accordingly. On aarch64 the resulting binary is change from: 0000000000000060 <__lll_lock_wait>: 60: 2a0103e5 mov w5, w1 64: b9400001 ldr w1, [x0] 68: aa0003e4 mov x4, x0 6c: 7100083f cmp w1, #0x2 70: 540000e1 b.ne 8c <__lll_lock_wait+0x2c> // b.any 74: 521900a1 eor w1, w5, #0x80 78: d2800042 mov x2, #0x2 // #2 7c: 93407c21 sxtw x1, w1 80: d2800003 mov x3, #0x0 // #0 84: d2800c48 mov x8, #0x62 // #98 88: d4000001 svc #0x0 8c: 521900a5 eor w5, w5, #0x80 90: 52800046 mov w6, #0x2 // #2 94: 93407ca5 sxtw x5, w5 98: 14000008 b b8 <__lll_lock_wait+0x58> 9c: d503201f nop a0: aa0403e0 mov x0, x4 a4: aa0503e1 mov x1, x5 a8: d2800042 mov x2, #0x2 // #2 ac: d2800003 mov x3, #0x0 // #0 b0: d2800c48 mov x8, #0x62 // #98 b4: d4000001 svc #0x0 b8: 885ffc80 ldaxr w0, [x4] bc: 88017c86 stxr w1, w6, [x4] c0: 35ffffc1 cbnz w1, b8 <__lll_lock_wait+0x58> c4: 35fffee0 cbnz w0, a0 <__lll_lock_wait+0x40> c8: d65f03c0 ret To: 0000000000000048 <__lll_lock_wait>: 48: aa0003e4 mov x4, x0 4c: 2a0103e5 mov w5, w1 50: b9400000 ldr w0, [x0] 54: 7100081f cmp w0, #0x2 58: 540000c0 b.eq 70 <__lll_lock_wait+0x28> // b.none 5c: 52800041 mov w1, #0x2 // #2 60: 885ffc80 ldaxr w0, [x4] 64: 88027c81 stxr w2, w1, [x4] 68: 35ffffc2 cbnz w2, 60 <__lll_lock_wait+0x18> 6c: 34000120 cbz w0, 90 <__lll_lock_wait+0x48> 70: 521900a1 eor w1, w5, #0x80 74: aa0403e0 mov x0, x4 78: 93407c21 sxtw x1, w1 7c: d2800042 mov x2, #0x2 // #2 80: d2800003 mov x3, #0x0 // #0 84: d2800c48 mov x8, #0x62 // #98 88: d4000001 svc #0x0 8c: 17fffff4 b 5c <__lll_lock_wait+0x14> 90: d65f03c0 ret I see similar changes on powerpc and other architectures. It also aligns with x86_64 implementation by adding the systemtap probes. Checker on aarch64-linux-gnu. * nptl/lowlevellock.c (__lll_lock_wait, __lll_lock_wait_private): Optimize futex call and add systemtap probe.
* Add single-thread.h headerAdhemerval Zanella2019-05-141-37/+0
| | | | | | | | | | | | | | | | | | | | | | | | | This patch move the single-thread syscall optimization defintions from syscall-cancel.h to new header file single-thread.h and also move the cancellation definitions from pthreadP.h to syscall-cancel.h. The idea is just simplify the inclusion of both syscall-cancel.h and single-thread.h (without the requirement of including all pthreadP.h defintions). No semantic changes expected, checked on a build for all major ABIs. * nptl/pthreadP.h (CANCEL_ASYNC, CANCEL_RESET, LIBC_CANCEL_ASYNC, LIBC_CANCEL_RESET, __libc_enable_asynccancel, __libc_disable_asynccancel, __librt_enable_asynccancel, __libc_disable_asynccancel, __librt_enable_asynccancel, __librt_disable_asynccancel): Move to ... * sysdeps/unix/sysv/linux/sysdep-cancel.h: ... here. (SINGLE_THREAD_P, RTLD_SINGLE_THREAD_P): Move to ... * sysdeps/unix/sysv/linux/single-thread.h: ... here. * sysdeps/generic/single-thread.h: New file. * sysdeps/unix/sysdep.h: Include single-thread.h. * sysdeps/unix/sysv/linux/futex-internal.h: Include sysdep-cancel.h. * sysdeps/unix/sysv/linux/lowlevellock-futex.h: Likewise.
* sem_close: Use __twalk_rFlorian Weimer2019-05-101-13/+15
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* nptl/tst-abstime: Use libsupportMike Crowe2019-05-091-52/+18
| | | | | | | | Checked on x86_64-linux-gnu and i686-linux-gnu. * nptl/tst-abstime.c: Use libsupport. Reviewed-by: Adhemerval Zanella <adhemerval.zanella@linaro.org>
* nptl: Convert some rwlock tests to use libsupportMike Crowe2019-05-094-386/+97
| | | | | | | | | | | | | | Checked on x86_64-linux-gnu and i686-linux-gnu. * nptl/tst-rwlock6.c: Use libsupport. This also happens to fix a small bug where only tv.tv_usec was checked which could cause an erroneous pass if pthread_rwlock_timedrdlock incorrectly took more than a second. * nptl/tst-rwlock7.c, nptl/tst-rwlock9.c, nptl/tst-rwlock14.c: Use libsupport. Reviewed-by: Adhemerval Zanella <adhemerval.zanella@linaro.org>
* nptl: Use recent additions to libsupport in tst-sem5Mike Crowe2019-05-091-16/+5
| | | | | | | | | Checked on x86_64-linux-gnu and i686-linux-gnu. * nptl/tst-sem5.c(do_test): Use xclock_gettime, timespec_add and TEST_TIMESPEC_NOW_OR_AFTER from libsupport. Reviewed-by: Adhemerval Zanella <adhemerval.zanella@linaro.org>
* nptl: Convert tst-cond11.c to use libsupportMike Crowe2019-05-091-133/+36
| | | | | | | | Checked on x86_64-linux-gnu and i686-linux-gnu. * nptl/tst-cond11.c: Use libsupport. Reviewed-by: Adhemerval Zanella <adhemerval.zanella@linaro.org>
* Move nptl/tst-eintr1 to xtestsSzabolcs Nagy2019-05-091-1/+6
| | | | | | | | | | Don't run nptl/tst-eintr1 by normal make check because it can spuriously break testing on various linux kernels. (Currently this affects the aarch64 glibc buildbot machine which regularly fails and loses test results.) [BZ #24537] * nptl/Makefile: Move tst-eintr1 to xtests.
* nptl/tst-rwlock14: Test pthread_rwlock_timedwrlock correctlyMike Crowe2019-03-251-6/+6
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* nptl: Convert tst-sem5 & tst-sem13 to use libsupportMike Crowe2019-03-252-79/+20
| | | | | | | | | | | | | | Checked on x86_64-linux-gnu and i686-linux-gnu. * nptl/tst-sem5.c: Remove unused headers. Add <support/check.h>. (do_test) Use libsupport test macros rather than hand-coded conditionals and error messages. Ensure that sem_init returns zero rather than not -1. Use <support/test-driver.c> rather than test-skeleton.c. * nptl/tst-sem13.c: Add <support/check.h>. (do_test) Use libsupport test macros rather than hand-coded conditionals and error messages. Use <support/test-driver.c> rather than test-skeleton.c.
* Refactor hp-timing rtld usageAdhemerval Zanella2019-03-221-1/+1
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | This patch refactor how hp-timing is used on loader code for statistics report. The HP_TIMING_AVAIL and HP_SMALL_TIMING_AVAIL are removed and HP_TIMING_INLINE is used instead to check for hp-timing avaliability. For alpha, which only defines HP_SMALL_TIMING_AVAIL, the HP_TIMING_INLINE is set iff for IS_IN(rtld). Checked on aarch64-linux-gnu, x86_64-linux-gnu, and i686-linux-gnu. I also checked the builds for all afected ABIs. * benchtests/bench-timing.h: Replace HP_TIMING_AVAIL with HP_TIMING_INLINE. * nptl/descr.h: Likewise. * elf/rtld.c (RLTD_TIMING_DECLARE, RTLD_TIMING_NOW, RTLD_TIMING_DIFF, RTLD_TIMING_ACCUM_NT, RTLD_TIMING_SET): Define. (dl_start_final_info, _dl_start_final, dl_main, print_statistics): Abstract hp-timing usage with RTLD_* macros. * sysdeps/alpha/hp-timing.h (HP_TIMING_INLINE): Define iff IS_IN(rtld). (HP_TIMING_AVAIL, HP_SMALL_TIMING_AVAIL): Remove. * sysdeps/generic/hp-timing.h (HP_TIMING_AVAIL, HP_SMALL_TIMING_AVAIL, HP_TIMING_NONAVAIL): Likewise. * sysdeps/ia64/hp-timing.h (HP_TIMING_AVAIL, HP_SMALL_TIMING_AVAIL): Likewise. * sysdeps/powerpc/powerpc32/power4/hp-timing.h (HP_TIMING_AVAIL, HP_SMALL_TIMING_AVAIL): Likewise. * sysdeps/powerpc/powerpc64/hp-timing.h (HP_TIMING_AVAIL, HP_SMALL_TIMING_AVAIL): Likewise. * sysdeps/sparc/sparc32/sparcv9/hp-timing.h (HP_TIMING_AVAIL, HP_SMALL_TIMING_AVAIL): Likewise. * sysdeps/sparc/sparc64/hp-timing.h (HP_TIMING_AVAIL, HP_SMALL_TIMING_AVAIL): Likewise. * sysdeps/x86/hp-timing.h (HP_TIMING_AVAIL, HP_SMALL_TIMING_AVAIL): Likewise. * sysdeps/generic/hp-timing-common.h: Update comment with HP_TIMING_AVAIL removal.
* nptl: Remove pthread_clock_gettime pthread_clock_settimeAdhemerval Zanella2019-03-228-192/+1
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | This patch removes CLOCK_THREAD_CPUTIME_ID and CLOCK_PROCESS_CPUTIME_ID support from clock_gettime and clock_settime generic implementation. For Linux, kernel already provides supports through the syscall and Hurd HTL lacks __pthread_clock_gettime and __pthread_clock_settime internal implementation. As described in clock_gettime man-page [1] on 'Historical note for SMP system', implementing CLOCK_{THREAD,PROCESS}_CPUTIME_ID with timer registers is error-prone and susceptible to timing and accurary issues that the libc can not deal without kernel support. This allows removes unused code which, however, still incur in some runtime overhead in thread creation (the struct pthread cpuclock_offset initialization). If hurd eventually wants to support them it should either either implement as a kernel facility (or something related due its architecture) or in system specific implementation. Checked on aarch64-linux-gnu, x86_64-linux-gnu, and i686-linux-gnu. I also checked on a i686-gnu build. * nptl/Makefile (libpthread-routines): Remove pthread_clock_gettime and pthread_clock_settime. * nptl/pthreadP.h (__find_thread_by_id): Remove prototype. * elf/dl-support.c [!HP_TIMING_NOAVAIL] (_dl_cpuclock_offset): Remove. (_dl_non_dynamic_init): Remove _dl_cpuclock_offset setting. * elf/rtld.c (_dl_start_final): Likewise. * nptl/allocatestack.c (__find_thread_by_id): Remove function. * sysdeps/generic/ldsodefs.h [!HP_TIMING_NOAVAIL] (_dl_cpuclock_offset): Remove. * sysdeps/mach/hurd/dl-sysdep.c [!HP_TIMING_NOAVAIL] (_dl_cpuclock_offset): Remove. * nptl/descr.h (struct pthread): Rename cpuclock_offset to cpuclock_offset_ununsed. * nptl/nptl-init.c (__pthread_initialize_minimal_internal): Remove cpuclock_offset set. * nptl/pthread_create.c (START_THREAD_DEFN): Likewise. * sysdeps/nptl/fork.c (__libc_fork): Likewise. * nptl/pthread_clock_gettime.c: Remove file. * nptl/pthread_clock_settime.c: Likewise. * sysdeps/unix/clock_gettime.c (hp_timing_gettime): Remove function. [HP_TIMING_AVAIL] (realtime_gettime): Remove CLOCK_THREAD_CPUTIME_ID and CLOCK_PROCESS_CPUTIME_ID support. * sysdeps/unix/clock_settime.c (hp_timing_gettime): Likewise. [HP_TIMING_AVAIL] (realtime_gettime): Likewise. * sysdeps/posix/clock_getres.c (hp_timing_getres): Likewise. [HP_TIMING_AVAIL] (__clock_getres): Likewise. * sysdeps/unix/clock_nanosleep.c (CPUCLOCK_P, INVALID_CLOCK_P): Likewise. (__clock_nanosleep): Remove CPUCLOCK_P and INVALID_CLOCK_P usage. [1] http://man7.org/linux/man-pages/man2/clock_gettime.2.html
* nptl: Assume __ASSUME_FUTEX_CLOCK_REALTIME supportAdhemerval Zanella2019-03-052-56/+0
| | | | | | | | | | | | | | | | | | | | | | | | | This patch assumes realtime clock support for nptl and thus removes all the associated code. For __pthread_mutex_timedlock the fallback usage for the case where lll_futex_timed_wait_bitset it not set define is also removed. The generic lowlevellock-futex.h always define it, so for NPTL code the check always yield true. Checked on x86_64-linux-gnu and i686-linux-gnu. * nptl/nptl-init.c (__have_futex_clock_realtime, __have_futex_clock_realtime): Remove definition. (__pthread_initialize_minimal_internal): Remove FUTEX_CLOCK_REALTIME check test for !__ASSUME_FUTEX_CLOCK_REALTIME. * nptl/pthread_mutex_timedlock.c (__pthread_mutex_timedlock): Assume __ASSUME_FUTEX_CLOCK_REALTIME support. * sysdeps/unix/sysv/linux/i386/lowlevellock.S: Likewise. * sysdeps/unix/sysv/linux/x86_64/lowlevellock.S: Likewise. * sysdeps/unix/sysv/linux/kernel-features.h (__ASSUME_FUTEX_CLOCK_REALTIME): Remove. * sysdeps/nptl/lowlevellock-futex.h (lll_futex_timed_wait_bitset): Adjust comment.
* Add some spaces before '('.Joseph Myers2019-02-272-3/+3
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | This patch fixes various places where a space should have been present before '(' in accordance with the GNU Coding Standards. Most but not all of the fixes in this patch are for calls to sizeof (but it's not exhaustive regarding such calls that should be fixed). Tested for x86_64, and with build-many-glibcs.py. * benchtests/bench-strcpy.c (do_test): Use space before '('. * benchtests/bench-string.h (cmdline_process_function): Likewise. * benchtests/bench-strlen.c (do_test): Likewise. (test_main): Likewise. * catgets/gencat.c (read_old): Likewise. * elf/cache.c (load_aux_cache): Likewise. * iconvdata/bug-iconv8.c (do_test): Likewise. * math/test-tgmath-ret.c (do_test): Likewise. * nis/nis_call.c (rec_dirsearch): Likewise. * nis/nis_findserv.c (__nis_findfastest_with_timeout): Likewise. * nptl/tst-audit-threads.c (do_test): Likewise. * nptl/tst-cancel4-common.h (set_socket_buffer): Likewise. * nss/nss_test1.c (init): Likewise. * nss/test-netdb.c (test_hosts): Likewise. * posix/execvpe.c (maybe_script_execute): Likewise. * stdio-common/tst-fmemopen4.c (do_test): Likewise. * stdio-common/tst-printf.c (do_test): Likewise. * stdio-common/vfscanf-internal.c (__vfscanf_internal): Likewise. * stdlib/fmtmsg.c (NKEYWORDS): Likewise. * stdlib/qsort.c (STACK_SIZE): Likewise. * stdlib/test-canon.c (do_test): Likewise. * stdlib/tst-swapcontext1.c (do_test): Likewise. * string/memcmp.c (OPSIZ): Likewise. * string/test-strcpy.c (do_test): Likewise. (do_random_tests): Likewise. * string/test-strlen.c (do_test): Likewise. (test_main): Likewise. * string/test-strrchr.c (do_test): Likewise. (do_random_tests): Likewise. * string/tester.c (test_memrchr): Likewise. (test_memchr): Likewise. * sysdeps/generic/memcopy.h (OPSIZ): Likewise. * sysdeps/generic/unwind-dw2.c (execute_stack_op): Likewise. * sysdeps/generic/unwind-pe.h (read_sleb128): Likewise. (read_encoded_value_with_base): Likewise. * sysdeps/hppa/dl-machine.h (elf_machine_runtime_setup): Likewise. * sysdeps/hppa/fpu/feupdateenv.c (__feupdateenv): Likewise. * sysdeps/ia64/fpu/sfp-machine.h (TI_BITS): Likewise. * sysdeps/mach/hurd/spawni.c (__spawni): Likewise. * sysdeps/posix/spawni.c (maybe_script_execute): Likewise. * sysdeps/powerpc/fpu/tst-setcontext-fpscr.c (query_auxv): Likewise. * sysdeps/unix/sysv/linux/aarch64/bits/procfs.h (ELF_NGREG): Likewise. * sysdeps/unix/sysv/linux/arm/bits/procfs.h (ELF_NGREG): Likewise. * sysdeps/unix/sysv/linux/arm/ioperm.c (init_iosys): Likewise. * sysdeps/unix/sysv/linux/csky/bits/procfs.h (ELF_NGREG): Likewise. * sysdeps/unix/sysv/linux/m68k/bits/procfs.h (ELF_NGREG): Likewise. * sysdeps/unix/sysv/linux/nios2/bits/procfs.h (ELF_NGREG): Likewise. * sysdeps/unix/sysv/linux/spawni.c (maybe_script_execute): Likewise. * sysdeps/unix/sysv/linux/x86/bits/procfs.h (ELF_NGREG): Likewise. * sysdeps/unix/sysv/linux/x86/bits/sigcontext.h (FP_XSTATE_MAGIC2_SIZE): Likewise. * sysdeps/x86/fpu/sfp-machine.h (TI_BITS): Likewise. * time/test_time.c (main): Likewise.
* Break more lines before not after operators.Joseph Myers2019-02-251-2/+3
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | This patch makes further coding style fixes where code was breaking lines after an operator, contrary to the GNU Coding Standards. As with the previous patch, it is limited to files following a reasonable approximation to GNU style already, and is not exhaustive; more such issues remain to be fixed. Tested for x86_64, and with build-many-glibcs.py. * dirent/dirent.h [!_DIRENT_HAVE_D_NAMLEN && _DIRENT_HAVE_D_RECLEN] (_D_ALLOC_NAMLEN): Break lines before rather than after operators. * elf/cache.c (print_cache): Likewise. * gshadow/fgetsgent_r.c (__fgetsgent_r): Likewise. * htl/pt-getattr.c (__pthread_getattr_np): Likewise. * hurd/hurdinit.c (_hurd_setproc): Likewise. * hurd/hurdkill.c (_hurd_sig_post): Likewise. * hurd/hurdlookup.c (__file_name_lookup_under): Likewise. * hurd/hurdsig.c (_hurd_internal_post_signal): Likewise. (reauth_proc): Likewise. * hurd/lookup-at.c (__file_name_lookup_at): Likewise. (__file_name_split_at): Likewise. (__directory_name_split_at): Likewise. * hurd/lookup-retry.c (__hurd_file_name_lookup_retry): Likewise. * hurd/port2fd.c (_hurd_port2fd): Likewise. * iconv/gconv_dl.c (do_print): Likewise. * inet/netinet/in.h (struct sockaddr_in): Likewise. * libio/wstrops.c (_IO_wstr_seekoff): Likewise. * locale/setlocale.c (new_composite_name): Likewise. * malloc/memusagestat.c (main): Likewise. * misc/fstab.c (fstab_convert): Likewise. * nptl/pthread_mutex_unlock.c (__pthread_mutex_unlock_usercnt): Likewise. * nss/nss_compat/compat-grp.c (getgrent_next_nss): Likewise. (getgrent_next_file): Likewise. (internal_getgrnam_r): Likewise. (internal_getgrgid_r): Likewise. * nss/nss_compat/compat-initgroups.c (getgrent_next_nss): Likewise. (internal_getgrent_r): Likewise. * nss/nss_compat/compat-pwd.c (getpwent_next_nss_netgr): Likewise. (getpwent_next_nss): Likewise. (getpwent_next_file): Likewise. (internal_getpwnam_r): Likewise. (internal_getpwuid_r): Likewise. * nss/nss_compat/compat-spwd.c (getspent_next_nss_netgr): Likewise. (getspent_next_nss): Likewise. (internal_getspnam_r): Likewise. * pwd/fgetpwent_r.c (__fgetpwent_r): Likewise. * shadow/fgetspent_r.c (__fgetspent_r): Likewise. * string/strchr.c (STRCHR): Likewise. * string/strchrnul.c (STRCHRNUL): Likewise. * sysdeps/aarch64/fpu/fpu_control.h (_FPU_FPCR_IEEE): Likewise. * sysdeps/aarch64/sfp-machine.h (_FP_CHOOSENAN): Likewise. * sysdeps/csky/dl-machine.h (elf_machine_rela): Likewise. * sysdeps/generic/memcopy.h (PAGE_COPY_FWD_MAYBE): Likewise. * sysdeps/generic/symbol-hacks.h (__stack_chk_fail_local): Likewise. * sysdeps/gnu/netinet/ip_icmp.h (ICMP_INFOTYPE): Likewise. * sysdeps/gnu/updwtmp.c (TRANSFORM_UTMP_FILE_NAME): Likewise. * sysdeps/gnu/utmp_file.c (TRANSFORM_UTMP_FILE_NAME): Likewise. * sysdeps/hppa/jmpbuf-unwind.h (_JMPBUF_UNWINDS): Likewise. * sysdeps/mach/hurd/bits/stat.h (S_ISPARE): Likewise. * sysdeps/mach/hurd/dl-sysdep.c (_dl_sysdep_start): Likewise. (open_file): Likewise. * sysdeps/mach/hurd/htl/pt-mutexattr-setprotocol.c (pthread_mutexattr_setprotocol): Likewise. * sysdeps/mach/hurd/ioctl.c (__ioctl): Likewise. * sysdeps/mach/hurd/mmap.c (__mmap): Likewise. * sysdeps/mach/hurd/ptrace.c (ptrace): Likewise. * sysdeps/mach/hurd/spawni.c (__spawni): Likewise. * sysdeps/microblaze/dl-machine.h (elf_machine_type_class): Likewise. (elf_machine_rela): Likewise. * sysdeps/mips/mips32/sfp-machine.h (_FP_CHOOSENAN): Likewise. * sysdeps/mips/mips64/sfp-machine.h (_FP_CHOOSENAN): Likewise. * sysdeps/mips/sys/asm.h (multiple #if conditionals): Likewise. * sysdeps/posix/rename.c (rename): Likewise. * sysdeps/powerpc/novmx-sigjmp.c (__novmx__sigjmp_save): Likewise. * sysdeps/powerpc/sigjmp.c (__vmx__sigjmp_save): Likewise. * sysdeps/s390/fpu/fenv_libc.h (FPC_VALID_MASK): Likewise. * sysdeps/s390/utf8-utf16-z9.c (gconv_end): Likewise. * sysdeps/unix/grantpt.c (grantpt): Likewise. * sysdeps/unix/sysv/linux/a.out.h (N_TXTOFF): Likewise. * sysdeps/unix/sysv/linux/updwtmp.c (TRANSFORM_UTMP_FILE_NAME): Likewise. * sysdeps/unix/sysv/linux/utmp_file.c (TRANSFORM_UTMP_FILE_NAME): Likewise. * sysdeps/x86/cpu-features.c (get_common_indices): Likewise. * time/tzfile.c (__tzfile_compute): Likewise.
* nptl: Fix comment typo in pthread_mutex_trylock.cWolfram Sang2019-02-191-1/+1
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* nptl: Fix pthread_tryjoin comment.Carlos O'Donell2019-02-191-1/+1
| | | | | | | | In pthread_tryjoin if pd->tid == 0 then we will not block on a futex operation because we will immediately see the join is already complete and return. The comment is fixed to reflect that. Signed-off-by: Carlos O'Donell <carlos@redhat.com>
* Move remaining nptl_db headers to sysdeps/nptlFlorian Weimer2019-02-161-1/+1
| | | | | | | sys/procfs.h was already using this sysdeps directory. This avoids the need for nptl-specific wrapper headers under include/, a generic location in the source tree.
* nptl: Fix invalid Systemtap probe in pthread_join [BZ #24211]Florian Weimer2019-02-151-2/+3
| | | | | | | | | | | | | | | | | | After commit f1ac7455831546e5dca0ed98fe8af2686fae7ce6 ("arm: Use "nr" constraint for Systemtap probes [BZ #24164]"), we load pd->result into a register in the probe below: /* Free the TCB. */ __free_tcb (pd); } else pd->joinid = NULL; LIBC_PROBE (pthread_join_ret, 3, threadid, result, pd->result); However, at this point, the thread descriptor has been freed. If the thread stack does not fit into the thread stack cache, the memory will have been unmapped, and the program will crash in the probe.
* nptl: Reinstate pthread_timedjoin_np as a cancellation point (BZ#24215)Adhemerval Zanella2019-02-146-130/+137
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Patch ce7eb0e90315 ("nptl: Cleanup cancellation macros") changed the join sequence for internal common __pthread_timedjoin_ex to use the new macro lll_wait_tid. The idea was this macro would issue the cancellable futex operation depending whether the timeout is used or not. However if a timeout is used, __lll_timedwait_tid is called and it is not a cancellable entrypoint. This patch fixes it by simplifying the code in various ways: - Instead of adding the cancellation handling on __lll_timedwait_tid, it moves the generic implementation to pthread_join_common.c (called now timedwait_tid with some fixes to use the correct type for pid). - The llvm_wait_tid macro is removed, along with its replication on x86_64, i686, and sparc arch-specific lowlevellock.h. - sparc32 __lll_timedwait_tid is also removed, since the code is similar to generic one. - x86_64 and i386 provides arch-specific __lll_timedwait_tid which is also removed since they are similar in functionality to generic C code and there is no indication it is better than compiler generated code. New tests, tst-join8 and tst-join9, are provided to check if pthread_timedjoin_np acts as a cancellation point. Checked on x86_64-linux-gnu, i686-linux-gnu, sparcv9-linux-gnu, and aarch64-linux-gnu. [BZ #24215] * nptl/Makefile (lpthread-routines): Remove lll_timedwait_tid. (tests): Add tst-join8 tst-join9. * nptl/lll_timedwait_tid.c: Remove file. * sysdeps/sparc/sparc32/lll_timedwait_tid.c: Likewise. * sysdeps/unix/sysv/linux/i386/lll_timedwait_tid.c: Likewise. * sysdeps/sysv/linux/x86_64/lll_timedwait_tid.c: Likewise. * nptl/pthread_join_common.c (timedwait_tid): New function. (__pthread_timedjoin_ex): Act as cancellation entrypoint is block is set. * nptl/tst-join5.c (thread_join): New function. (tf1, tf2, do_test): Use libsupport and add pthread_timedjoin_np check. * nptl/tst-join8.c: New file. * nptl/tst-join9.c: Likewise. * sysdeps/nptl/lowlevellock-futex.h (lll_futex_wait_cancel, lll_futex_timed_wait_cancel): Add generic macros. * sysdeps/nptl/lowlevellock.h (__lll_timedwait_tid, lll_wait_tid): Remove definitions. * sysdeps/unix/sysv/linux/i386/lowlevellock.h: Likewise. * sysdeps/unix/sysv/linux/sparc/lowlevellock.h: Likewise. * sysdeps/unix/sysv/linux/x86_64/lowlevellock.h: Likewise. * sysdeps/sparc/sparc32/lowlevellock.c (__lll_timedwait_tid): Remove function. * sysdeps/unix/sysv/linux/i386/lowlevellock.S (__lll_timedwait_tid): Likewise. * sysdeps/unix/sysv/linux/x86_64/lowlevellock.S: Likewise. * sysdeps/unix/sysv/linux/lowlevellock-futex.h (lll_futex_timed_wait_cancel): New macro.
* RISC-V: Fix elfutils testsuite unwind failures.Jim Wilson2019-02-132-1/+6
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | The clone.S patch fixes 2 elfutils testsuite unwind failures, where the backtrace gets stuck repeating __thread_start until we hit the backtrace limit. This was confirmed by building and installing a patched glibc and then building elfutils and running its testsuite. Unfortunately, the testcase isn't working as expected and I don't know why. The testcase passes even when my clone.S patch is not installed. The testcase looks logically similarly to the elfutils testcases that are failing. Maybe there is a subtle difference in how the glibc unwinding works versus the elfutils unwinding? I don't have good gdb pthread support yet, so I haven't found a way to debug this. Anyways, I don't know if the testcase is useful or not. If the testcase isn't useful then maybe the clone.S patch is OK without a testcase? Jim [BZ #24040] * elf/Makefile (CFLAGS-tst-unwind-main.c): Add -DUSE_PTHREADS=0. * elf/tst-unwind-main.c: If USE_PTHEADS, include pthread.h and error.h (func): New. (main): If USE_PTHREADS, call pthread_create to run func. Otherwise call func directly. * nptl/Makefile (tests): Add tst-unwind-thread. (CFLAGS-tst-unwind-thread.c): Define. * nptl/tst-unwind-thread.c: New file. * sysdeps/unix/sysv/linux/riscv/clone.S (__thread_start): Mark ra as undefined.
* nptl: Avoid fork handler lock for async-signal-safe fork [BZ #24161]Florian Weimer2019-02-081-3/+5
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Commit 27761a1042daf01987e7d79636d0c41511c6df3c ("Refactor atfork handlers") introduced a lock, atfork_lock, around fork handler list accesses. It turns out that this lock occasionally results in self-deadlocks in malloc/tst-mallocfork2: (gdb) bt #0 __lll_lock_wait_private () at ../sysdeps/unix/sysv/linux/x86_64/lowlevellock.S:63 #1 0x00007f160c6f927a in __run_fork_handlers (who=(unknown: 209394016), who@entry=atfork_run_prepare) at register-atfork.c:116 #2 0x00007f160c6b7897 in __libc_fork () at ../sysdeps/nptl/fork.c:58 #3 0x00000000004027d6 in sigusr1_handler (signo=<optimized out>) at tst-mallocfork2.c:80 #4 sigusr1_handler (signo=<optimized out>) at tst-mallocfork2.c:64 #5 <signal handler called> #6 0x00007f160c6f92e4 in __run_fork_handlers (who=who@entry=atfork_run_parent) at register-atfork.c:136 #7 0x00007f160c6b79a2 in __libc_fork () at ../sysdeps/nptl/fork.c:152 #8 0x0000000000402567 in do_test () at tst-mallocfork2.c:156 #9 0x0000000000402dd2 in support_test_main (argc=1, argv=0x7ffc81ef1ab0, config=config@entry=0x7ffc81ef1970) at support_test_main.c:350 #10 0x0000000000402362 in main (argc=<optimized out>, argv=<optimized out>) at ../support/test-driver.c:168 If no locking happens in the single-threaded case (where fork is expected to be async-signal-safe), this deadlock is avoided. (pthread_atfork is not required to be async-signal-safe, so a fork call from a signal handler interrupting pthread_atfork is not a problem.)
* Add compiler barriers around modifications of the robust mutex list for ↵Stefan Liebler2019-02-071-4/+53
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | pthread_mutex_trylock. [BZ #24180] While debugging a kernel warning, Thomas Gleixner, Sebastian Sewior and Heiko Carstens found a bug in pthread_mutex_trylock due to misordered instructions: 140: a5 1b 00 01 oill %r1,1 144: e5 48 a0 f0 00 00 mvghi 240(%r10),0 <--- THREAD_SETMEM (THREAD_SELF, robust_head.list_op_pending, NULL); 14a: e3 10 a0 e0 00 24 stg %r1,224(%r10) <--- last THREAD_SETMEM of ENQUEUE_MUTEX_PI vs (with compiler barriers): 140: a5 1b 00 01 oill %r1,1 144: e3 10 a0 e0 00 24 stg %r1,224(%r10) 14a: e5 48 a0 f0 00 00 mvghi 240(%r10),0 Please have a look at the discussion: "Re: WARN_ON_ONCE(!new_owner) within wake_futex_pi() triggerede" (https://lore.kernel.org/lkml/20190202112006.GB3381@osiris/) This patch is introducing the same compiler barriers and comments for pthread_mutex_trylock as introduced for pthread_mutex_lock and pthread_mutex_timedlock by commit 8f9450a0b7a9e78267e8ae1ab1000ebca08e473e "Add compiler barriers around modifications of the robust mutex list." ChangeLog: [BZ #24180] * nptl/pthread_mutex_trylock.c (__pthread_mutex_trylock):
* Avoid "inline" after return type in function definitions.Joseph Myers2019-02-061-2/+1
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | One group of warnings seen with -Wextra is warnings for static or inline not at the start of a declaration (-Wold-style-declaration). This patch fixes various such cases for inline, ensuring it comes at the start of the declaration (after any static). A common case of the fix is "static inline <type> __always_inline"; the definition of __always_inline starts with __inline, so the natural change is to "static __always_inline <type>". Other cases of the warning may be harder to fix (one pattern is a function definition that gets rewritten to be static by an including file, "#define funcname static wrapped_funcname" or similar), but it seems worth fixing these cases with inline anyway. Tested for x86_64. * elf/dl-load.h (_dl_postprocess_loadcmd): Use __always_inline before return type, without separate inline. * elf/dl-tunables.c (maybe_enable_malloc_check): Likewise. * elf/dl-tunables.h (tunable_is_name): Likewise. * malloc/malloc.c (do_set_trim_threshold): Likewise. (do_set_top_pad): Likewise. (do_set_mmap_threshold): Likewise. (do_set_mmaps_max): Likewise. (do_set_mallopt_check): Likewise. (do_set_perturb_byte): Likewise. (do_set_arena_test): Likewise. (do_set_arena_max): Likewise. (do_set_tcache_max): Likewise. (do_set_tcache_count): Likewise. (do_set_tcache_unsorted_limit): Likewise. * nis/nis_subr.c (count_dots): Likewise. * nptl/allocatestack.c (advise_stack_range): Likewise. * sysdeps/ieee754/dbl-64/s_sin.c (do_cos): Likewise. (do_sin): Likewise. (reduce_sincos): Likewise. (do_sincos): Likewise. * sysdeps/unix/sysv/linux/x86/elision-conf.c (do_set_elision_enable): Likewise. (TUNABLE_CALLBACK_FNDECL): Likewise.
* Fix alignment of TLS variables for tls variant TLS_TCB_AT_TP [BZ #23403]Stefan Liebler2019-02-062-42/+52
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | The alignment of TLS variables is wrong if accessed from within a thread for architectures with tls variant TLS_TCB_AT_TP. For the main thread the static tls data is properly aligned. For other threads the alignment depends on the alignment of the thread pointer as the static tls data is located relative to this pointer. This patch adds this alignment for TLS_TCB_AT_TP variants in the same way as it is already done for TLS_DTV_AT_TP. The thread pointer is also already properly aligned if the user provides its own stack for the new thread. This patch extends the testcase nptl/tst-tls1.c in order to check the alignment of the tls variables and it adds a pthread_create invocation with a user provided stack. The test itself is migrated from test-skeleton.c to test-driver.c and the missing support functions xpthread_attr_setstack and xposix_memalign are added. ChangeLog: [BZ #23403] * nptl/allocatestack.c (allocate_stack): Align pointer pd for TLS_TCB_AT_TP tls variant. * nptl/tst-tls1.c: Migrate to support/test-driver.c. Add alignment checks. * support/Makefile (libsupport-routines): Add xposix_memalign and xpthread_setstack. * support/support.h: Add xposix_memalign. * support/xthread.h: Add xpthread_attr_setstack. * support/xposix_memalign.c: New File. * support/xpthread_attr_setstack.c: Likewise.
* nptl: Fix pthread_rwlock_try*lock stalls (Bug 23844)Carlos O'Donell2019-01-315-11/+489
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | For a full analysis of both the pthread_rwlock_tryrdlock() stall and the pthread_rwlock_trywrlock() stall see: https://sourceware.org/bugzilla/show_bug.cgi?id=23844#c14 In the pthread_rwlock_trydlock() function we fail to inspect for PTHREAD_RWLOCK_FUTEX_USED in __wrphase_futex and wake the waiting readers. In the pthread_rwlock_trywrlock() function we write 1 to __wrphase_futex and loose the setting of the PTHREAD_RWLOCK_FUTEX_USED bit, again failing to wake waiting readers during unlock. The fix in the case of pthread_rwlock_trydlock() is to check for PTHREAD_RWLOCK_FUTEX_USED and wake the readers. The fix in the case of pthread_rwlock_trywrlock() is to only write 1 to __wrphase_futex if we installed the write phase, since all other readers would be spinning waiting for this step. We add two new tests, one exercises the stall for pthread_rwlock_trywrlock() which is easy to exercise, and one exercises the stall for pthread_rwlock_trydlock() which is harder to exercise. The pthread_rwlock_trywrlock() test fails consistently without the fix, and passes after. The pthread_rwlock_tryrdlock() test fails roughly 5-10% of the time without the fix, and passes all the time after. Signed-off-by: Carlos O'Donell <carlos@redhat.com> Signed-off-by: Torvald Riegel <triegel@redhat.com> Signed-off-by: Rik Prohaska <prohaska7@gmail.com> Co-authored-by: Torvald Riegel <triegel@redhat.com> Co-authored-by: Rik Prohaska <prohaska7@gmail.com>
* nptl: Cleanup cancellation macrosAdhemerval Zanella2019-01-032-15/+2
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | This patch wraps all uses of *_{enable,disable}_asynccancel and and *_CANCEL_{ASYNC,RESET} in either already provided macros (lll_futex_timed_wait_cancel) or creates new ones if the functionality is not provided (SYSCALL_CANCEL_NCS, lll_futex_wait_cancel, and lll_futex_timed_wait_cancel). Also for some generic implementations, the direct call of the macros are removed since the underlying symbols are suppose to provide cancellation support. This is a priliminary patch intended to simplify the work required for BZ#12683 fix. It is a refactor change, no semantic changes are expected. Checked on x86_64-linux-gnu and i686-linux-gnu. * nptl/pthread_join_common.c (__pthread_timedjoin_ex): Use lll_wait_tid with timeout. * nptl/sem_wait.c (__old_sem_wait): Use lll_futex_wait_cancel. * sysdeps/nptl/aio_misc.h (AIO_MISC_WAIT): Use futex_reltimed_wait_cancelable for cancelabla mode. * sysdeps/nptl/gai_misc.h (GAI_MISC_WAIT): Likewise. * sysdeps/posix/open64.c (__libc_open64): Do not call cancelation macros. * sysdeps/posix/sigwait.c (__sigwait): Likewise. * sysdeps/posix/waitid.c (__sigwait): Likewise. * sysdeps/unix/sysdep.h (__SYSCALL_CANCEL_CALL, SYSCALL_CANCEL_NCS): New macro. * sysdeps/nptl/lowlevellock.h (lll_wait_tid): Add timeout argument. (lll_timedwait_tid): Remove macro. * sysdeps/unix/sysv/linux/i386/lowlevellock.h (lll_wait_tid): Likewise. (lll_timedwait_tid): Likewise. * sysdeps/unix/sysv/linux/sparc/lowlevellock.h (lll_wait_tid): Likewise. (lll_timedwait_tid): Likewise. * sysdeps/unix/sysv/linux/x86_64/lowlevellock.h (lll_wait_tid): Likewise. (lll_timedwait_tid): Likewise. * sysdeps/unix/sysv/linux/clock_nanosleep.c (__clock_nanosleep): Use INTERNAL_SYSCALL_CANCEL. * sysdeps/unix/sysv/linux/futex-internal.h (futex_reltimed_wait_cancelable): Use LIBC_CANCEL_{ASYNC,RESET} instead of __pthread_{enable,disable}_asynccancel. * sysdeps/unix/sysv/linux/lowlevellock-futex.h (lll_futex_wait_cancel): New macro.
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