From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mail-dy1-f202.google.com (mail-dy1-f202.google.com [74.125.82.202]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id A22492C3259 for ; Sat, 10 Jan 2026 08:27:03 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=74.125.82.202 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1768033625; cv=none; b=cLgRD/bFz592oTGjnVapMQ//h+M38W79ATH4Hh3CPFBU64qX6i8/WVx6vYD3WzMQJRzyYi3iR2uoH4v24OdxsOO+TXTZku/stvSYuLLCTj2Eh/fjdEtxuazro+HUpiRs/3TzaTh2Q8tnMB3AU3nSWAUFFsPME8gp8IkpmgH2GX8= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1768033625; c=relaxed/simple; bh=1ak4EbbMn2mQ7CCM9fvd52UG+g8mxf3+0yQa0DXyMds=; h=Date:Mime-Version:Message-ID:Subject:From:To:Content-Type; b=fQbXOxplA6mj7xfIgEQg1eCqkug3ZBSliVtJf4vphCB5dQGPMv24mQGVIOEu02IuaTQuNI/qoJOwf+hF7GnDXQ6f67CB2A7mdx5nPsTebq9fHrZkvDu/DXl+oGbCLqDTpDOsSScyhJWnUOuAnetd1byv0R0JQ3VsAdqqtFye8yA= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=pass (p=reject dis=none) header.from=google.com; spf=pass smtp.mailfrom=flex--irogers.bounces.google.com; dkim=pass (2048-bit key) header.d=google.com header.i=@google.com header.b=dgDdODT0; arc=none smtp.client-ip=74.125.82.202 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=reject dis=none) header.from=google.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=flex--irogers.bounces.google.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=google.com header.i=@google.com header.b="dgDdODT0" Received: by mail-dy1-f202.google.com with SMTP id 5a478bee46e88-2b0530846d3so4371571eec.0 for ; Sat, 10 Jan 2026 00:27:03 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=20230601; t=1768033623; x=1768638423; darn=vger.kernel.org; h=to:from:subject:message-id:mime-version:date:from:to:cc:subject :date:message-id:reply-to; bh=MUdZ4k1ahmP8CtZagsnpANZxLnDzWZojx1CZUgRO8ME=; b=dgDdODT0VsmGl8FLIHygN/yHzqEKOjwf3CK79Z93BrMjfi3memNgHkyt4OpyW5Nx0P KVL4wV3KkqFqqlkIwGkP68wF0RXmML8CF8/m2Zk4tHCltAqLaZzjfkr+qvfewkwDbjBO lrEN/MfmeSM83ukFGZ/dtpKHOu5jIIcC/2gYzCbS3DBSpGXlZACIJDwV+pM2xkgbF3bV pZSSZt6JTFmRMi2ylcDiFrHirQQ1WtMcjvY/BBb+EXb8eBBQzJo2sRpDcFeWcuLeZAaW 7T8KeeSlGvet2Yg3ZreNsWVuh6edHAiqU5GisznqgtHEQpodj1aVOV6WO1HAt1Gz8X7Z YvLQ== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1768033623; x=1768638423; h=to:from:subject:message-id:mime-version:date:x-gm-message-state :from:to:cc:subject:date:message-id:reply-to; bh=MUdZ4k1ahmP8CtZagsnpANZxLnDzWZojx1CZUgRO8ME=; b=HqFekG5E7LPhMekbc6EOdqdRllmTCCwOjtl7JNzwbQyzosxh5W5dBB9wlcY/KIJyzr 6W2EG0BxWE9LqmjH7LuD3S9gBZox9i7wOlKwG3T1veqzHhU600Y9nHAceVONudrLNrDO CWjWfHQby5Nih8SjzqN5KUfocokfUD9soVcy3RhmfrIxBKH54VGgEgQ1RyjW6VQCZowW j8MAzfpGkfQdcdY/2oTscnvgsbsqc7+nOe7W27HK+lOC6E68xQwrXEpDQWqOxcbE8+PQ mP8RCcCQs36YoyJiuwDJI+RScqrJ+sTlm+5W4RjspU7+aZFdefGLRVufsRlF9aluCXVo YBWQ== X-Forwarded-Encrypted: i=1; AJvYcCWMpPnNwACTpnsNzrFRCSLrX1xrMx0TN5NxwOKd5gOKZZ8Jy3/EjeoMMN/V4ZLeTQnXOqu/U2x8v3TuDEo=@vger.kernel.org X-Gm-Message-State: AOJu0YxcVseP597WUHyLu6LpaTyV4dJBWy1iwdDr08Vkuw551gbKHiv4 CQWmg4vx2rTBj4tY0IojDDJXjvuPnFAhIfhOibV/tnUxszEdCZg4+C7X6ox4hGRL99fDxbdzw4/ Lz7kniGRDow== X-Google-Smtp-Source: AGHT+IHnM4MaVa+q7KSOMhFrMKvLlkzVXa88DDSnqd30d1k+/9yAo4vxHBFBec8pCEv7xylM0FAy1QFJZ8uw X-Received: from dyjl17.prod.google.com ([2002:a05:7300:2691:b0:2ac:1eee:fda8]) (user=irogers job=prod-delivery.src-stubby-dispatcher) by 2002:a05:693c:2b14:b0:2ae:5f28:eafc with SMTP id 5a478bee46e88-2b17d2b0c26mr9076824eec.27.1768033622677; Sat, 10 Jan 2026 00:27:02 -0800 (PST) Date: Sat, 10 Jan 2026 00:26:41 -0800 Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: Mime-Version: 1.0 X-Mailer: git-send-email 2.52.0.457.g6b5491de43-goog Message-ID: <20260110082647.1487574-1-irogers@google.com> Subject: [PATCH v2 0/6] Add a libdw addr2line implementation From: Ian Rogers To: Tony Jones , Peter Zijlstra , Ingo Molnar , Arnaldo Carvalho de Melo , Namhyung Kim , Alexander Shishkin , Jiri Olsa , Ian Rogers , Adrian Hunter , James Clark , Howard Chu , Stephen Brennan , linux-kernel@vger.kernel.org, linux-perf-users@vger.kernel.org Content-Type: text/plain; charset="UTF-8" addr2line is a performance bottleneck in perf, add a libdw based implementation that avoids forking addr2line and caches the decoded debug information. Allow the addr2line implementation to be picked via the configuration file or --addr2line-style with `perf report`. Test/fix that inline callchains are properly displayed by perf script. v2: Fix bias issue with libdwfl functions. Use cu_walk_functions_at from perf's dwarf-aux to fully walk inline functions. Add testing that inlined functions are shown in the perf script srcline callchain information. Add configurability as to which addr2line style to use. v1: https://lore.kernel.org/lkml/20251122093934.94971-1-irogers@google.com/ Ian Rogers (6): perf addr2line: Add a libdw implementation perf addr2line.c: Rename a2l_style to cmd_a2l_style perf srcline: Add configuration support for the addr2line style perf callchain: Fix srcline printing with inlines perf test workload: Add inlineloop test workload perf test: Test addr2line unwinding works with inline functions tools/perf/builtin-report.c | 10 ++ tools/perf/tests/builtin-test.c | 1 + tools/perf/tests/shell/addr2line_inlines.sh | 47 +++++++ tools/perf/tests/tests.h | 1 + tools/perf/tests/workloads/Build | 2 + tools/perf/tests/workloads/inlineloop.c | 52 +++++++ tools/perf/util/Build | 1 + tools/perf/util/addr2line.c | 20 +-- tools/perf/util/config.c | 4 + tools/perf/util/dso.c | 2 + tools/perf/util/dso.h | 11 ++ tools/perf/util/evsel_fprintf.c | 8 +- tools/perf/util/libdw.c | 148 ++++++++++++++++++++ tools/perf/util/libdw.h | 60 ++++++++ tools/perf/util/srcline.c | 116 +++++++++++++-- tools/perf/util/srcline.h | 3 + tools/perf/util/symbol_conf.h | 10 ++ 17 files changed, 476 insertions(+), 20 deletions(-) create mode 100755 tools/perf/tests/shell/addr2line_inlines.sh create mode 100644 tools/perf/tests/workloads/inlineloop.c create mode 100644 tools/perf/util/libdw.c create mode 100644 tools/perf/util/libdw.h -- 2.52.0.457.g6b5491de43-goog