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The rseq area is placed directly into struct pthread. rseq registration failure is not treated as an error, so it is possible that threads run with inconsistent registration status. <sys/rseq.h> is not yet installed as a public header. Co-Authored-By: Mathieu Desnoyers <mathieu.desnoyers@efficios.com> Reviewed-by: Szabolcs Nagy <szabolcs.nagy@arm.com> Reviewed-by: Siddhesh Poyarekar <siddhesh@sourceware.org>
46 lines
1.5 KiB
C
46 lines
1.5 KiB
C
/* Restartable Sequences internal API. Linux implementation.
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Copyright (C) 2021 Free Software Foundation, Inc.
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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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#ifndef RSEQ_INTERNAL_H
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#define RSEQ_INTERNAL_H
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#include <sysdep.h>
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#include <errno.h>
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#include <kernel-features.h>
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#include <stdio.h>
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#include <sys/rseq.h>
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#ifdef RSEQ_SIG
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static inline void
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rseq_register_current_thread (struct pthread *self)
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{
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int ret = INTERNAL_SYSCALL_CALL (rseq,
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&self->rseq_area, sizeof (self->rseq_area),
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0, RSEQ_SIG);
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if (INTERNAL_SYSCALL_ERROR_P (ret))
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THREAD_SETMEM (self, rseq_area.cpu_id, RSEQ_CPU_ID_REGISTRATION_FAILED);
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}
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#else /* RSEQ_SIG */
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static inline void
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rseq_register_current_thread (struct pthread *self)
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{
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THREAD_SETMEM (self, rseq_area.cpu_id, RSEQ_CPU_ID_REGISTRATION_FAILED);
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}
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#endif /* RSEQ_SIG */
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#endif /* rseq-internal.h */
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