From: sashiko-bot@kernel.org
To: "Arnaldo Carvalho de Melo" <acme@kernel.org>
Cc: linux-perf-users@vger.kernel.org
Subject: Re: [PATCH v1 02/12] perf annotate-data: Resolve DW_OP_addrx global variables
Date: Fri, 13 Nov 2026 15:14:06 +0000 [thread overview]
Message-ID: <sashiko-outbox-213067@kernel.org> (raw)
In-Reply-To: <20261113150555.1163049-3-acme@kernel.org>
> From: Arnaldo Carvalho de Melo <acme@redhat.com>
>
> clang emits DW_AT_location with DW_OP_addrx for global variables in
> DWARF 5, gcc emits DW_OP_addr. The address index was not resolved, so
> those variables were not found by address; the by-name fallback also
> missed the ones in .bss past the file backed end of the last segment.
>
> Resolve the index with dwarf_getlocation_attr() + dwarf_formaddr() and
> use the resulting address in the by-address lookup and in the global
> variable cache. Add a test that compiles the workload with clang
> -gdwarf-5 and checks that the global is annotated.
>
> Fixes: d60469d7c0e5c4e8 ("perf dwarf-aux: Add die_find_variable_by_addr()")
> Fixes: d7b60803a790b716 ("perf dwarf-aux: Add die_collect_global_vars()")
> Cc: Namhyung Kim <namhyung@kernel.org>
> Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Sashiko has reviewed this patch and found no issues.
--
Sashiko AI review · https://sashiko.dev/#/patchset/20261113150555.1163049-1-acme@kernel.org?part=2
next prev parent reply other threads:[~2026-11-13 15:14 UTC|newest]
Thread overview: 27+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-11-13 15:05 [PATCH v1 0/12] perf coverage: A harness for perf, and the fixes it found Arnaldo Carvalho de Melo
2026-11-13 15:05 ` [PATCH v1 01/12] perf scripts: Add a coverage harness for perf Arnaldo Carvalho de Melo
2026-11-13 15:23 ` sashiko-bot
2026-11-13 15:05 ` [PATCH v1 02/12] perf annotate-data: Resolve DW_OP_addrx global variables Arnaldo Carvalho de Melo
2026-11-13 15:14 ` sashiko-bot [this message]
2026-11-13 15:05 ` [PATCH v1 03/12] perf tests: Exercise the flexible array member path Arnaldo Carvalho de Melo
2026-11-13 15:12 ` sashiko-bot
2026-11-13 15:05 ` [PATCH v1 04/12] perf annotate-data: Count flexible array accesses for the whole struct Arnaldo Carvalho de Melo
2026-11-13 15:20 ` sashiko-bot
2026-11-13 15:05 ` [PATCH v1 05/12] perf tests: Exercise data type resolution from a register Arnaldo Carvalho de Melo
2026-11-13 15:13 ` sashiko-bot
2026-11-13 15:05 ` [PATCH v1 06/12] perf annotate: Print the stats after the annotations Arnaldo Carvalho de Melo
2026-11-13 15:24 ` sashiko-bot
2026-11-13 15:05 ` [PATCH v1 07/12] perf tests: Silence the libbfd probe in build-test Arnaldo Carvalho de Melo
2026-11-13 15:08 ` sashiko-bot
2026-11-13 15:05 ` [PATCH v1 08/12] perf build: Record the display-only features in FEATURE-DUMP Arnaldo Carvalho de Melo
2026-11-13 15:14 ` sashiko-bot
2026-11-13 15:05 ` [PATCH v1 09/12] perf cs-etm: Fall back to the recorded instruction size on a failed read Arnaldo Carvalho de Melo
2026-11-13 15:11 ` sashiko-bot
2026-11-13 15:15 ` Leo Yan
2026-11-13 15:20 ` Arnaldo Carvalho de Melo
2026-11-13 15:05 ` [PATCH v1 10/12] perf tests: Fix the Intel PT virtual LBR check Arnaldo Carvalho de Melo
2026-11-13 15:25 ` sashiko-bot
2026-11-13 15:05 ` [PATCH v1 11/12] perf test: Drop samples without an IP in the dlfilter test Arnaldo Carvalho de Melo
2026-11-13 15:13 ` sashiko-bot
2026-11-13 15:05 ` [PATCH v1 12/12] perf test: Skip the LBR inline unwinding check when unsupported Arnaldo Carvalho de Melo
2026-11-13 15:16 ` sashiko-bot
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