Message ID | 20200915133000.14668-2-lukma@denx.de |
---|---|
State | New |
Headers | show |
Series | [1/3] nptl: futex: Move __NR_futex_time64 alias to beginning of futex-internal.h | expand |
On Sep 15 2020, Lukasz Majewski wrote: > diff --git a/sysdeps/nptl/futex-internal.c b/sysdeps/nptl/futex-internal.c > index adb3c20611..9f17881e47 100644 > --- a/sysdeps/nptl/futex-internal.c > +++ b/sysdeps/nptl/futex-internal.c > @@ -41,6 +41,25 @@ __futex_abstimed_wait_cancellable32 (unsigned int* futex_word, > &ts32, NULL /* Unused. */, > FUTEX_BITSET_MATCH_ANY); > } > + > +static int > +__futex_abstimed_wait32 (unsigned int* futex_word, > + unsigned int expected, clockid_t clockid, > + const struct __timespec64* abstime, > + int private) > +{ > + if (! in_time_t_range (abstime->tv_sec)) > + return -EOVERFLOW; > + > + unsigned int clockbit = (clockid == CLOCK_REALTIME) ? > + FUTEX_CLOCK_REALTIME : 0; > + int op = __lll_private_flag (FUTEX_WAIT_BITSET | clockbit, private); > + > + struct timespec ts32 = valid_timespec64_to_timespec (*abstime); abstime may be NULL. Andreas.
Hi Andreas, > On Sep 15 2020, Lukasz Majewski wrote: > > > diff --git a/sysdeps/nptl/futex-internal.c > > b/sysdeps/nptl/futex-internal.c index adb3c20611..9f17881e47 100644 > > --- a/sysdeps/nptl/futex-internal.c > > +++ b/sysdeps/nptl/futex-internal.c > > @@ -41,6 +41,25 @@ __futex_abstimed_wait_cancellable32 (unsigned > > int* futex_word, &ts32, NULL /* Unused. */, > > FUTEX_BITSET_MATCH_ANY); > > } > > + > > +static int > > +__futex_abstimed_wait32 (unsigned int* futex_word, > > + unsigned int expected, clockid_t clockid, > > + const struct __timespec64* abstime, > > + int private) > > +{ > > + if (! in_time_t_range (abstime->tv_sec)) > > + return -EOVERFLOW; > > + > > + unsigned int clockbit = (clockid == CLOCK_REALTIME) ? > > + FUTEX_CLOCK_REALTIME : 0; > > + int op = __lll_private_flag (FUTEX_WAIT_BITSET | clockbit, > > private); + > > + struct timespec ts32 = valid_timespec64_to_timespec (*abstime); > > abstime may be NULL. Thanks for pointing this out. Although the pthread_rwlock_rdlock syscalls have *abstime marked as non-null, the used afterwards __pthread_rwlock_rdlock_full64() passes NULL as abstime. I will fix this and submit v2. > > Andreas. > Best regards, Lukasz Majewski -- DENX Software Engineering GmbH, Managing Director: Wolfgang Denk HRB 165235 Munich, Office: Kirchenstr.5, D-82194 Groebenzell, Germany Phone: (+49)-8142-66989-59 Fax: (+49)-8142-66989-80 Email: lukma@denx.de
diff --git a/sysdeps/nptl/futex-internal.c b/sysdeps/nptl/futex-internal.c index adb3c20611..9f17881e47 100644 --- a/sysdeps/nptl/futex-internal.c +++ b/sysdeps/nptl/futex-internal.c @@ -41,6 +41,25 @@ __futex_abstimed_wait_cancellable32 (unsigned int* futex_word, &ts32, NULL /* Unused. */, FUTEX_BITSET_MATCH_ANY); } + +static int +__futex_abstimed_wait32 (unsigned int* futex_word, + unsigned int expected, clockid_t clockid, + const struct __timespec64* abstime, + int private) +{ + if (! in_time_t_range (abstime->tv_sec)) + return -EOVERFLOW; + + unsigned int clockbit = (clockid == CLOCK_REALTIME) ? + FUTEX_CLOCK_REALTIME : 0; + int op = __lll_private_flag (FUTEX_WAIT_BITSET | clockbit, private); + + struct timespec ts32 = valid_timespec64_to_timespec (*abstime); + return INTERNAL_SYSCALL_CALL (futex, futex_word, op, expected, + &ts32, NULL /* Unused. */, + FUTEX_BITSET_MATCH_ANY); +} #endif int @@ -93,3 +112,50 @@ __futex_abstimed_wait_cancelable64 (unsigned int* futex_word, futex_fatal_error (); } } + +int +__futex_abstimed_wait64 (unsigned int* futex_word, unsigned int expected, + clockid_t clockid, + const struct __timespec64* abstime, int private) +{ + unsigned int clockbit; + int err; + + /* Work around the fact that the kernel rejects negative timeout values + despite them being valid. */ + if (__glibc_unlikely ((abstime != NULL) && (abstime->tv_sec < 0))) + return ETIMEDOUT; + + if (! lll_futex_supported_clockid(clockid)) + return EINVAL; + + clockbit = (clockid == CLOCK_REALTIME) ? FUTEX_CLOCK_REALTIME : 0; + int op = __lll_private_flag (FUTEX_WAIT_BITSET | clockbit, private); + + err = INTERNAL_SYSCALL_CALL (futex_time64, futex_word, op, expected, + abstime, NULL /* Unused. */, + FUTEX_BITSET_MATCH_ANY); +#ifndef __ASSUME_TIME64_SYSCALLS + if (err == -ENOSYS) + err = __futex_abstimed_wait32 (futex_word, expected, + clockid, abstime, private); +#endif + switch (err) + { + case 0: + case -EAGAIN: + case -EINTR: + case -ETIMEDOUT: + return -err; + + case -EFAULT: /* Must have been caused by a glibc or application bug. */ + case -EINVAL: /* Either due to wrong alignment, unsupported + clockid or due to the timeout not being + normalized. Must have been caused by a glibc or + application bug. */ + case -ENOSYS: /* Must have been caused by a glibc bug. */ + /* No other errors are documented at this time. */ + default: + futex_fatal_error (); + } +} diff --git a/sysdeps/nptl/futex-internal.h b/sysdeps/nptl/futex-internal.h index 7f3910ad98..1ba0d61938 100644 --- a/sysdeps/nptl/futex-internal.h +++ b/sysdeps/nptl/futex-internal.h @@ -529,4 +529,10 @@ __futex_abstimed_wait_cancelable64 (unsigned int* futex_word, const struct __timespec64* abstime, int private) attribute_hidden; +int +__futex_abstimed_wait64 (unsigned int* futex_word, unsigned int expected, + clockid_t clockid, + const struct __timespec64* abstime, + int private) attribute_hidden; + #endif /* futex-internal.h */ diff --git a/sysdeps/unix/sysv/linux/m68k/Makefile b/sysdeps/unix/sysv/linux/m68k/Makefile index be40fae68a..65164c5752 100644 --- a/sysdeps/unix/sysv/linux/m68k/Makefile +++ b/sysdeps/unix/sysv/linux/m68k/Makefile @@ -21,3 +21,5 @@ sysdep-dl-routines += dl-static sysdep-others += lddlibc4 install-bin += lddlibc4 endif + +CFLAGS-futex-internal.c += -fno-inline