From mboxrd@z Thu Jan 1 00:00:00 1970 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 100052D5923; Mon, 3 Nov 2025 18:03:27 +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=1762193008; cv=none; b=BTQ2BNvVvMgpOkpbRtfst/pf0PGGMMBUjHIaXUrjkrEADR/K8+dIaSxHSCWheSUuGlYN1STYkxjq2DyMRANCSuUanVIbT+wxQi3XkrXWdIHbXoMaQnW46m7x3x2L1TSlkuKrO01aui/HutG6Fs4fszTp97eCRtTxRzkBvNL6Xzs= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1762193008; c=relaxed/simple; bh=n5r3uOjmIK6D05MaUmyFyOQ+o9yCG1GbJnXVqMCdNh0=; h=Date:From:To:Cc:Subject:Message-ID:MIME-Version:Content-Type: Content-Disposition; b=raRQiLwTk6N7Nzx06rPyL9FdLB0TeyuYzmi8llSU0Ne98D9pvqNSZoP8KCBEQXK/6Z//vlbpMw+QVnifoHH3t+mTXx75uPs0ijR82S6tuJdJiMpWW58ASv/LjMgqaDg7KiZugQTh6dKqis/R/6swGCf7piWQCblD2I7mcwki2V4= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=HtJTXrYC; 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="HtJTXrYC" Received: by smtp.kernel.org (Postfix) with ESMTPSA id B5B32C4CEF8; Mon, 3 Nov 2025 18:03:26 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1762193007; bh=n5r3uOjmIK6D05MaUmyFyOQ+o9yCG1GbJnXVqMCdNh0=; h=Date:From:To:Cc:Subject:From; b=HtJTXrYCYOKzo6m1UckSDEsIrDH+N5+bGQXRQhV05LIVguCh618oLSLfA77lKZGJF XenzXrbv8LLY6S33Bs1vgbN3HbzMxIoVPhlybVgrvonqTIGwL9e3f+d4AHsuzKNMK5 Y9+JXFdtQuWQbLPt80s80gOu8rIKUHgDMcm5Uy2009qActRiw98I1BuP9whYugSF25 q/xLtvpwBEDdJaLiFz/IIVR6JHN+QCi1NpSlwHWat4Q9v3lT2F3oF0BFC7dOZ62N+r 75B6JMNgRVrkPmXJ7M2dLBfa+/DggrRFQ3cpdpXYYP9UsKMyOIvVEJjl5cKu4hg6aw KJF89Fr9zdvbA== Date: Mon, 3 Nov 2025 15:03:23 -0300 From: Arnaldo Carvalho de Melo To: Miguel Ojeda Cc: Alex Gaynor , Alice Ryhl , Andreas Hindborg , Benno Lossin , =?iso-8859-1?Q?Bj=F6rn?= Roy Baron , Boqun Feng , Danilo Krummrich , Gary Guo , Trevor Gross , Adrian Hunter , Ian Rogers , James Clark , Jiri Olsa , Namhyung Kim , linux-kernel@vger.kernel.org, linux-perf-users@vger.kernel.org Subject: [PATCH 1/1] perf symbols: Handle '1' symbols in /proc/kallsyms Message-ID: Precedence: bulk X-Mailing-List: linux-perf-users@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset=iso-8859-1 Content-Disposition: inline Content-Transfer-Encoding: 8bit Just FYI, I'm carrying this on the perf tools tree. I started seeing this in recent Fedora 42 kernels: root@x1:~# uname -a Linux x1 6.17.4-200.fc42.x86_64 #1 SMP PREEMPT_DYNAMIC Sun Oct 19 18:47:49 UTC 2025 x86_64 GNU/Linux root@x1:~# root@x1:~# perf test 1 1: vmlinux symtab matches kallsyms : FAILED! root@x1:~# Related to: root@x1:~# grep ' 1 ' /proc/kallsyms ffffffffb098bc00 1 __pfx__RNCINvNtNtNtCsfwaGRd4cjqE_4core4iter8adapters3map12map_try_foldjNtCskFudTml27HW_12drm_panic_qr7VersionuINtNtNtBa_3ops12control_flow11ControlFlowB10_ENcB10_0NCINvNvNtNtNtB8_6traits8iterator8Iterator4find5checkB10_NCNvMB12_B10_13from_segments0E0E0B12_ ffffffffb098bc10 1 _RNCINvNtNtNtCsfwaGRd4cjqE_4core4iter8adapters3map12map_try_foldjNtCskFudTml27HW_12drm_panic_qr7VersionuINtNtNtBa_3ops12control_flow11ControlFlowB10_ENcB10_0NCINvNvNtNtNtB8_6traits8iterator8Iterator4find5checkB10_NCNvMB12_B10_13from_segments0E0E0B12_ root@x1:~# That is found in: root@x1:~# pahole --running_kernel_vmlinux /usr/lib/debug/lib/modules/6.17.4-200.fc42.x86_64/vmlinux root@x1:~# root@x1:~# readelf -sW /usr/lib/debug/lib/modules/6.17.4-200.fc42.x86_64/vmlinux | grep __pfx__RNCINvNtNtNtCsfwaGRd4cjqE_4core4iter8adapters3map12map_try_foldjNtCskFudTml27HW_12drm_panic_qr7VersionuINtNtNtBa_3ops12control_flow11ControlFlowB10_ENcB10_0NCINvNvNtNtNtB8_6traits8iterator8Iterator4find5checkB10_NCNvMB12_B10_13from_segments0E0E0B12_ 150649: ffffffff81f8bc00 16 FUNC LOCAL DEFAULT 1 __pfx__RNCINvNtNtNtCsfwaGRd4cjqE_4core4iter8adapters3map12map_try_foldjNtCskFudTml27HW_12drm_panic_qr7VersionuINtNtNtBa_3ops12control_flow11ControlFlowB10_ENcB10_0NCINvNvNtNtNtB8_6traits8iterator8Iterator4find5checkB10_NCNvMB12_B10_13from_segments0E0E0B12_ root@x1:~# But was being filtered out when reading /proc/kallsyms, as the '1' symbol type was not being handled, do it, there are just two of them at this point. Cc: Alex Gaynor Cc: Alice Ryhl Cc: Andreas Hindborg Cc: Benno Lossin Cc: Björn Roy Baron Cc: Boqun Feng Cc: Danilo Krummrich Cc: Gary Guo Cc: Miguel Ojeda Cc: Trevor Gross Signed-off-by: Arnaldo Carvalho de Melo --- tools/perf/util/symbol.c | 6 +++++- 1 file changed, 5 insertions(+), 1 deletion(-) diff --git a/tools/perf/util/symbol.c b/tools/perf/util/symbol.c index cc26b7bf302b29d6..948d3e8ad782bc2a 100644 --- a/tools/perf/util/symbol.c +++ b/tools/perf/util/symbol.c @@ -112,9 +112,13 @@ static bool symbol_type__filter(char __symbol_type) // 'N' first seen in: // ffffffff9b35d130 N __pfx__RNCINvNtNtNtCsbDUBuN8AbD4_4core4iter8adapters3map12map_try_foldjNtCs6vVzKs5jPr6_12drm_panic_qr7VersionuINtNtNtBa_3ops12control_flow11ControlFlowB10_ENcB10_0NCINvNvNtNtNtB8_6traits8iterator8Iterator4find5checkB10_NCNvMB12_B10_13from_segments0E0E0B12_ // a seemingly Rust mangled name + // Ditto for '1': + // root@x1:~# grep ' 1 ' /proc/kallsyms + // ffffffffb098bc00 1 __pfx__RNCINvNtNtNtCsfwaGRd4cjqE_4core4iter8adapters3map12map_try_foldjNtCskFudTml27HW_12drm_panic_qr7VersionuINtNtNtBa_3ops12control_flow11ControlFlowB10_ENcB10_0NCINvNvNtNtNtB8_6traits8iterator8Iterator4find5checkB10_NCNvMB12_B10_13from_segments0E0E0B12_ + // ffffffffb098bc10 1 _RNCINvNtNtNtCsfwaGRd4cjqE_4core4iter8adapters3map12map_try_foldjNtCskFudTml27HW_12drm_panic_qr7VersionuINtNtNtBa_3ops12control_flow11ControlFlowB10_ENcB10_0NCINvNvNtNtNtB8_6traits8iterator8Iterator4find5checkB10_NCNvMB12_B10_13from_segments0E0E0B12_ char symbol_type = toupper(__symbol_type); return symbol_type == 'T' || symbol_type == 'W' || symbol_type == 'D' || symbol_type == 'B' || - __symbol_type == 'u' || __symbol_type == 'l' || __symbol_type == 'N'; + __symbol_type == 'u' || __symbol_type == 'l' || __symbol_type == 'N' || __symbol_type == '1'; } static int prefix_underscores_count(const char *str) -- 2.51.1