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a9acb7b39e
Currently glibc uses in_time_t_range to detects time_t overflow, and if it occurs fallbacks to 64 bit syscall version. The function name is confusing because internally time_t might be either 32 bits or 64 bits (depending on __TIMESIZE). This patch refactors the in_time_t_range by replacing it with in_int32_t_range for the case to check if the 64 bit time_t syscall should be used. The in_time_t range is used to detect overflow of the syscall return value. Reviewed-by: Adhemerval Zanella <adhemerval.zanella@linaro.org>
84 lines
2.5 KiB
C
84 lines
2.5 KiB
C
/* Copyright (C) 1997-2022 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, see
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<https://www.gnu.org/licenses/>. */
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#include <signal.h>
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#include <sysdep.h>
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int
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__sigtimedwait64 (const sigset_t *set, siginfo_t *info,
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const struct __timespec64 *timeout)
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{
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#ifndef __NR_rt_sigtimedwait_time64
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# define __NR_rt_sigtimedwait_time64 __NR_rt_sigtimedwait
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#endif
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int result;
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#ifdef __ASSUME_TIME64_SYSCALLS
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result = SYSCALL_CANCEL (rt_sigtimedwait_time64, set, info, timeout,
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__NSIG_BYTES);
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#else
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bool need_time64 = timeout != NULL && !in_int32_t_range (timeout->tv_sec);
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if (need_time64)
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{
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result = SYSCALL_CANCEL (rt_sigtimedwait_time64, set, info, timeout,
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__NSIG_BYTES);
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if (result == 0 || errno != ENOSYS)
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return result;
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__set_errno (EOVERFLOW);
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return -1;
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}
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else
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{
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struct timespec ts32, *pts32 = NULL;
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if (timeout != NULL)
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{
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ts32 = valid_timespec64_to_timespec (*timeout);
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pts32 = &ts32;
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}
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result = SYSCALL_CANCEL (rt_sigtimedwait, set, info, pts32,
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__NSIG_BYTES);
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}
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#endif
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/* The kernel generates a SI_TKILL code in si_code in case tkill is
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used. tkill is transparently used in raise(). Since having
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SI_TKILL as a code is useful in general we fold the results
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here. */
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if (result != -1 && info != NULL && info->si_code == SI_TKILL)
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info->si_code = SI_USER;
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return result;
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}
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#if __TIMESIZE != 64
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libc_hidden_def (__sigtimedwait64)
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int
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__sigtimedwait (const sigset_t *set, siginfo_t *info,
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const struct timespec *timeout)
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{
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struct __timespec64 ts64, *pts64 = NULL;
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if (timeout != NULL)
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{
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ts64 = valid_timespec_to_timespec64 (*timeout);
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pts64 = &ts64;
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}
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return __sigtimedwait64 (set, info, pts64);
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}
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#endif
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libc_hidden_def (__sigtimedwait)
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weak_alias (__sigtimedwait, sigtimedwait)
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