From: sashiko-bot@kernel.org
To: "Ian Rogers" <irogers@google.com>
Cc: linux-perf-users@vger.kernel.org
Subject: Re: [PATCH 1/9] perf libbfd: Fix the clang -Wthread-safety build failure
Date: Wed, 16 Sep 2026 06:18:10 +0000 [thread overview]
Message-ID: <20260916061810.C080C1F000FF@smtp.kernel.org> (raw)
In-Reply-To: <20260916061218.3061216-2-irogers@google.com>
> perf_bfd_lock() and perf_bfd_unlock() are the callbacks given to
> bfd_thread_init(), so by design they acquire and release the lock on
> libbfd's behalf and the lock state differs between entry and exit.
> clang's thread safety analysis, which perf builds with as an error,
> flags both:
>
> util/libbfd.c:56:1: error: mutex 'bfd_mutex' is still held at the end of function [-Werror,-Wthread-safety-analysis]
> util/libbfd.c:60:2: error: releasing mutex 'bfd_mutex' that was not held [-Werror,-Wthread-safety-analysis]
>
> Mark both functions NO_THREAD_SAFETY_ANALYSIS so that libbfd.c compiles
> with "make CC=clang BUILD_NONDISTRO=1".
>
> Fixes: b72b8132d8fd ("perf libbfd: Ensure libbfd is initialized prior to use")
> Signed-off-by: Ian Rogers <irogers@google.com>
Sashiko has reviewed this patch and found no issues. It looks great!
--
Sashiko AI review · https://sashiko.dev/#/patchset/20260916061218.3061216-1-irogers@google.com?part=1
next prev parent reply other threads:[~2026-09-16 6:18 UTC|newest]
Thread overview: 23+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-09-16 6:12 [PATCH 0/9] perf build: Fix builds with clang and BUILD_NONDISTRO Ian Rogers
2026-09-16 6:12 ` [PATCH 1/9] perf libbfd: Fix the clang -Wthread-safety build failure Ian Rogers
2026-09-16 6:18 ` sashiko-bot [this message]
2026-09-16 6:12 ` [PATCH 2/9] perf symbol: Fix the build when demangling with libbfd Ian Rogers
2026-09-16 6:21 ` sashiko-bot
2026-09-16 6:12 ` [PATCH 3/9] perf libbfd: Include the headers that are used Ian Rogers
2026-09-16 6:22 ` sashiko-bot
2026-09-16 15:54 ` Ian Rogers
2026-09-16 17:37 ` Namhyung Kim
2026-09-16 6:12 ` [PATCH 4/9] perf pmu: " Ian Rogers
2026-09-16 6:14 ` sashiko-bot
2026-09-16 6:12 ` [PATCH 5/9] perf build: Only pass clang flags to CXX when CXX is clang Ian Rogers
2026-09-16 6:17 ` sashiko-bot
2026-09-16 6:12 ` [PATCH 6/9] perf build: Use the given CC rather than clang in clang builds Ian Rogers
2026-09-16 6:19 ` sashiko-bot
2026-09-16 6:12 ` [PATCH 7/9] perf build: Check the version of the compiler that is used Ian Rogers
2026-09-16 6:16 ` sashiko-bot
2026-09-16 6:12 ` [PATCH 8/9] perf build: Remove leftovers of removed build options Ian Rogers
2026-09-16 6:17 ` sashiko-bot
2026-09-16 6:12 ` [PATCH 9/9] perf test: Add build tests for clang and libbfd demangling Ian Rogers
2026-09-16 6:22 ` sashiko-bot
2026-09-16 17:35 ` [PATCH 0/9] perf build: Fix builds with clang and BUILD_NONDISTRO Namhyung Kim
2026-09-22 12:47 ` Arnaldo Carvalho de Melo
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