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author | Lukasz Majewski <lukma@denx.de> | 2020-02-10 10:55:24 +0100 |
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committer | Lukasz Majewski <lukma@denx.de> | 2020-04-06 23:05:11 +0200 |
commit | 6f5eb5b2e57c507b17e3ba8c76433109d276a148 (patch) | |
tree | 8e03750f289f98e599cf0cde205a2bfdae786c3f /include | |
parent | 390b5a4727924503095327087c5d5f7a369732ef (diff) | |
download | glibc-6f5eb5b2e57c507b17e3ba8c76433109d276a148.tar.gz glibc-6f5eb5b2e57c507b17e3ba8c76433109d276a148.tar.xz glibc-6f5eb5b2e57c507b17e3ba8c76433109d276a148.zip |
y2038: linux: Provide __mq_timedsend_time64 implementation
This patch provides new __mq_timedsend_time64 explicit 64 bit function for sending messages with absolute timeout. Moreover, a 32 bit version - __mq_timedsend has been refactored to internally use __mq_timedsend_time64. The __mq_timedsend is now supposed to be used on systems still supporting 32 bit time (__TIMESIZE != 64) - hence the necessary conversion to 64 bit struct __timespec64 from struct timespec. The new __mq_timedsend_time64 syscall available from Linux 5.1+ has been used, when applicable. As this wrapper function is also used internally in the glibc, to e.g. provide mq_send implementation, an explicit check for abs_timeout being NULL has been added due to conversions between struct timespec and struct __timespec64. Before this change the Linux kernel handled this NULL pointer. Build tests: - ./src/scripts/build-many-glibcs.py glibcs Run-time tests: - Run specific tests on ARM/x86 32bit systems (qemu): https://github.com/lmajewski/meta-y2038 and run tests: https://github.com/lmajewski/y2038-tests/commits/master Linux kernel, headers and minimal kernel version for glibc build test matrix: - Linux v5.1 (with mq_timedsend_time64) and glibc built with v5.1 as a minimal kernel version (--enable-kernel="5.1.0") The __ASSUME_TIME64_SYSCALLS flag defined. - Linux v5.1 and default minimal kernel version The __ASSUME_TIME64_SYSCALLS not defined, but kernel supports mq_timedsend_time64 syscall. - Linux v4.19 (no mq_timedsend_time64 support) with default minimal kernel version for contemporary glibc (3.2.0) This kernel doesn't support mq_timedsend_time64 syscall, so the fallback to mq_timedsend is tested. Above tests were performed with Y2038 redirection applied as well as without (so the __TIMESIZE != 64 execution path is checked as well). Reviewed-by: Adhemerval Zanella <adhemerval.zanella@linaro.org>
Diffstat (limited to 'include')
-rw-r--r-- | include/mqueue.h | 9 |
1 files changed, 9 insertions, 0 deletions
diff --git a/include/mqueue.h b/include/mqueue.h index 3c66f1711e..32e6570529 100644 --- a/include/mqueue.h +++ b/include/mqueue.h @@ -10,4 +10,13 @@ extern __typeof (mq_timedreceive) __mq_timedreceive __nonnull ((2, 5)); hidden_proto (__mq_timedreceive) hidden_proto (mq_setattr) # endif +#include <struct___timespec64.h> +#if __TIMESIZE == 64 +# define __mq_timedsend_time64 __mq_timedsend +#else +extern int __mq_timedsend_time64 (mqd_t mqdes, const char *msg_ptr, + size_t msg_len, unsigned int msg_prio, + const struct __timespec64 *abs_timeout); +librt_hidden_proto (__mq_timedsend_time64) +#endif #endif |