From nobody Sun Feb 8 07:07:54 2026 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-1.web.codeaurora.org [10.30.226.201]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 316AE350A2F; Tue, 13 Jan 2026 23:37:59 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=10.30.226.201 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1768347479; cv=none; b=YSmbl+AYysm0UpBrrQj2fjHh+g7EX2OBebDk1Pg6uBB0LMgQBMhahJYRna7NAtF2HZHi+V2V3+kjxMX8qiLE4cfWI1+K4SHM+aDAy8F6pNVQ3Q7NjEnuximV2zxuWYcGqi7/38egh+H8oCniyvsYP6ugeN9s3sP1P0CT4BAA5U4= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1768347479; c=relaxed/simple; bh=JGTqhV59QkKFc7X6jgO/PsLiLpy3ZTMw89lLplbbB2o=; h=From:To:Cc:Subject:Date:Message-ID:MIME-Version; b=qKZUJ2ZmJf+s00BnE5Ad7+q0RNhlQfqIo1u5+wbbqOadgfraz7E74y0mJsjvDG5deiWTjdHBFnyCVchhU3oDxrAwfpLmZd1b1GRGenT/LkwIPXdGy8E0ZD9mA+fBrOccyWXtBhOT8sPt3eKRfyStOppDtN4SncUNAErlxcTruPc= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=LxQkJ//2; arc=none smtp.client-ip=10.30.226.201 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b="LxQkJ//2" Received: by smtp.kernel.org (Postfix) with ESMTPSA id A458EC116C6; Tue, 13 Jan 2026 23:37:58 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1768347479; bh=JGTqhV59QkKFc7X6jgO/PsLiLpy3ZTMw89lLplbbB2o=; h=From:To:Cc:Subject:Date:From; b=LxQkJ//2HlJIpw/akcaeI2PwnVlC5RBhb7iHqbLHB+TdNUAzD3zEkiZ5zjZw+O1Wn 79laLoHfZ98UlsoS9AHsJPy+GtygHgbLpNK1cnh9tNx9Vwj+djH2fwLMWOCaEoKlWc YCB7iIuq7M68dGE1Krts//kxfFL6YsAQh2SBrs7O10oyMt0h1n3I+RQrlzjlJHxzZL A/5AwTb0w4ApQvFPFgF2Refvhy3ZI+6SdhfildE6B3XeD109DmTNlbcPDhSfXFgTJi GTKbixAsShQcuvmn8FbjqN1Ha6jk24931YZwJqY1oYRolyVhAusIauNRyOLn8I5ny3 hhC7DSA+VRrAg== From: Namhyung Kim To: Arnaldo Carvalho de Melo , Ian Rogers , James Clark Cc: Jiri Olsa , Adrian Hunter , Peter Zijlstra , Ingo Molnar , LKML , linux-perf-users@vger.kernel.org Subject: [PATCH] perf tools: Get debug info of DSO properly Date: Tue, 13 Jan 2026 15:37:57 -0800 Message-ID: <20260113233757.62347-1-namhyung@kernel.org> X-Mailer: git-send-email 2.52.0.457.g6b5491de43-goog Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset="utf-8" The dso__debuginfo() just used the path name to open the file but it may be outdated. It should check build-ID and use the file in the build-ID cache if available rather than just using the path name. Let's factor out dso__get_filename() to avoid code duplicate. Fixes: 53a61a6ca279165d ("perf annotate: Add dso__debuginfo() helper") Signed-off-by: Namhyung Kim Reviewed-by: Ian Rogers --- tools/perf/util/dso.c | 63 ++++++++++++++++++++++++++++++++----------- tools/perf/util/dso.h | 11 ++------ 2 files changed, 50 insertions(+), 24 deletions(-) diff --git a/tools/perf/util/dso.c b/tools/perf/util/dso.c index 06980844c014ec9b..922fcc2f798baa57 100644 --- a/tools/perf/util/dso.c +++ b/tools/perf/util/dso.c @@ -112,7 +112,7 @@ bool dso__is_object_file(const struct dso *dso) =20 int dso__read_binary_type_filename(const struct dso *dso, enum dso_binary_type type, - char *root_dir, char *filename, size_t size) + const char *root_dir, char *filename, size_t size) { char build_id_hex[SBUILD_ID_SIZE]; int ret =3D 0; @@ -564,20 +564,15 @@ char *dso__filename_with_chroot(const struct dso *dso= , const char *filename) return filename_with_chroot(nsinfo__pid(dso__nsinfo_const(dso)), filename= ); } =20 -static int __open_dso(struct dso *dso, struct machine *machine) - EXCLUSIVE_LOCKS_REQUIRED(_dso__data_open_lock) +static char *dso__get_filename(struct dso *dso, const char *root_dir, + bool *decomp) { - int fd =3D -EINVAL; - char *root_dir =3D (char *)""; char *name =3D malloc(PATH_MAX); - bool decomp =3D false; =20 - if (!name) - return -ENOMEM; + *decomp =3D false; =20 - mutex_lock(dso__lock(dso)); - if (machine) - root_dir =3D machine->root_dir; + if (name =3D=3D NULL) + return NULL; =20 if (dso__read_binary_type_filename(dso, dso__binary_type(dso), root_dir, name, PATH_MAX)) @@ -602,20 +597,38 @@ static int __open_dso(struct dso *dso, struct machine= *machine) size_t len =3D sizeof(newpath); =20 if (dso__decompress_kmodule_path(dso, name, newpath, len) < 0) { - fd =3D -(*dso__load_errno(dso)); + errno =3D *dso__load_errno(dso); goto out; } =20 - decomp =3D true; + *decomp =3D true; strcpy(name, newpath); } + return name; + +out: + free(name); + return NULL; +} =20 - fd =3D do_open(name); +static int __open_dso(struct dso *dso, struct machine *machine) + EXCLUSIVE_LOCKS_REQUIRED(_dso__data_open_lock) +{ + int fd =3D -EINVAL; + char *name; + bool decomp =3D false; + + mutex_lock(dso__lock(dso)); + + name =3D dso__get_filename(dso, machine ? machine->root_dir : "", &decomp= ); + if (name) + fd =3D do_open(name); + else + fd =3D -errno; =20 if (decomp) unlink(name); =20 -out: mutex_unlock(dso__lock(dso)); free(name); return fd; @@ -1912,3 +1925,23 @@ const u8 *dso__read_symbol(struct dso *dso, const ch= ar *symfs_filename, return __dso__read_symbol(dso, symfs_filename, start, len, out_buf, out_buf_len, is_64bit); } + +struct debuginfo *dso__debuginfo(struct dso *dso) +{ + char *name; + bool decomp =3D false; + struct debuginfo *dinfo =3D NULL; + + mutex_lock(dso__lock(dso)); + + name =3D dso__get_filename(dso, "", &decomp); + if (name) + dinfo =3D debuginfo__new(name); + + if (decomp) + unlink(name); + + mutex_unlock(dso__lock(dso)); + free(name); + return dinfo; +} diff --git a/tools/perf/util/dso.h b/tools/perf/util/dso.h index 4aee23775054cf83..3dd7d0fc00797f37 100644 --- a/tools/perf/util/dso.h +++ b/tools/perf/util/dso.h @@ -777,7 +777,7 @@ int dso__kernel_module_get_build_id(struct dso *dso, co= nst char *root_dir); =20 char dso__symtab_origin(const struct dso *dso); int dso__read_binary_type_filename(const struct dso *dso, enum dso_binary_= type type, - char *root_dir, char *filename, size_t size); + const char *root_dir, char *filename, size_t size); bool is_kernel_module(const char *pathname, int cpumode); bool dso__needs_decompress(struct dso *dso); int dso__decompress_kmodule_fd(struct dso *dso, const char *name); @@ -926,14 +926,7 @@ u64 dso__findnew_global_type(struct dso *dso, u64 addr= , u64 offset); bool perf_pid_map_tid(const char *dso_name, int *tid); bool is_perf_pid_map_name(const char *dso_name); =20 -/* - * In the future, we may get debuginfo using build-ID (w/o path). - * Add this helper is for the smooth conversion. - */ -static inline struct debuginfo *dso__debuginfo(struct dso *dso) -{ - return debuginfo__new(dso__long_name(dso)); -} +struct debuginfo *dso__debuginfo(struct dso *dso); =20 const u8 *dso__read_symbol(struct dso *dso, const char *symfs_filename, const struct map *map, const struct symbol *sym, --=20 2.52.0.457.g6b5491de43-goog