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https://github.com/riscv-software-src/opensbi.git
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Carlos López
8d109c7e87
Add macros to properly guard clang's thread safety analysis attributes keeping compatibility with GCC, on top of making things more readable. Clang < 19 does not support guarded_by() [0], so do not define the macros in that case. [0] https://github.com/llvm/llvm-project/pull/94216 Signed-off-by: Carlos López <carlos.lopezr4096@gmail.com> Reviewed-by: Anup Patel <anup@brainfault.org> Link: https://lore.kernel.org/r/20260909162322.29778-3-carlos.lopezr4096@gmail.com Signed-off-by: Anup Patel <anup@brainfault.org>
36 lines
1.1 KiB
C
36 lines
1.1 KiB
C
/*
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* SPDX-License-Identifier: BSD-2-Clause
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*
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* Copyright (c) 2025 SiFive
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*/
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#ifndef __SBI_VISIBILITY_H__
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#define __SBI_VISIBILITY_H__
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#ifndef __DTS__
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/*
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* Declare all global objects with hidden visibility so access is PC-relative
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* instead of going through the GOT.
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*/
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#pragma GCC visibility push(hidden)
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#endif
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/* Thread Safety Analysis (TSA) annotations for use with clang -Wthread-safety */
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#if defined(__clang__) && __clang_major__ >= 19
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#define TSA_ATTR(x) __attribute__((x))
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#else
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#define TSA_ATTR(x)
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#endif
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#define CAPABILITY(x) TSA_ATTR(capability(x))
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#define GUARDED_BY(x) TSA_ATTR(guarded_by(x))
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#define PT_GUARDED_BY(x) TSA_ATTR(pt_guarded_by(x))
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#define ACQUIRE(...) TSA_ATTR(acquire_capability(__VA_ARGS__))
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#define RELEASE(...) TSA_ATTR(release_capability(__VA_ARGS__))
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#define MUST_HOLD(...) TSA_ATTR(requires_capability(__VA_ARGS__))
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#define MUST_NOT_HOLD(...) TSA_ATTR(locks_excluded(__VA_ARGS__))
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#define TRY_ACQUIRE(b, ...) TSA_ATTR(try_acquire_capability(b, __VA_ARGS__))
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#define NO_THREAD_SAFETY_ANALYSIS TSA_ATTR(no_thread_safety_analysis)
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#endif
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