From nobody Wed Dec 17 19:52:28 2025 Received: from mail-yb1-f202.google.com (mail-yb1-f202.google.com [209.85.219.202]) (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 5DBD21DDA35 for ; Mon, 16 Dec 2024 23:25:15 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.219.202 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1734391516; cv=none; b=sVLYj9E+0VFXZ7cve2EbEXslV9Re16F/U04SDi0l+X02BJdb6arQ36l6JLDnWl+lhKDX0uiucAjG6HqhENe5PH8HRi2zSchJqzzWNglY67RGFhGux0te5GqlP45bXLqBVyi8PqrO4zFhgXDSDmfFNo5NZiJsYWAmtVXB3OaqjCk= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1734391516; c=relaxed/simple; bh=iEVYgx/hxX84VyoDEpscAjkrNLwDJylilFK5OuBYN9g=; h=Date:In-Reply-To:Message-Id:Mime-Version:References:Subject:From: To:Content-Type; b=N6CV8uGZ/q6ajoeKe6liOHTcxdKEtew1kiCrSAaD/qQPc9+ZGrjSxgzFeCqYn4eEsQ2SnhWv8kQhK17i3k1F58DZSBXCu43mCUB3GuMyxmeqdvZQp6RRfmccTFLQe36vGYXYdRWh6UnLWek56nISZy4sZHMMewDf+d+NUbsSBcE= 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=ySu7h231; arc=none smtp.client-ip=209.85.219.202 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="ySu7h231" Received: by mail-yb1-f202.google.com with SMTP id 3f1490d57ef6-e49f3aa78fcso2261316276.1 for ; Mon, 16 Dec 2024 15:25:15 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=20230601; t=1734391514; x=1734996314; darn=vger.kernel.org; h=to:from:subject:references:mime-version:message-id:in-reply-to:date :from:to:cc:subject:date:message-id:reply-to; bh=FTHl2TPsCH6LymZInluDoB5DdWMc8GssygaKpaKL3WI=; b=ySu7h23181UwWbX3I1NG9aj9Z7WJvw5rfzZVCunSWu6M5wRL/3MKid1z1Jq1mQF8ss IxdyVPzfn5k25QW60zLy6oMWzCYMrT8VgEB3d4k8OkWkHkj4zaS91IEtyYaFzq46NEH6 HYG6YhjSM4J2U5jhQhJYtfbMYlnzfg6JCiDIMzBhBN5rbep3+bLRpMTtyhQoCiGyVlln 3wBKCUZqGFlt++BgOnjugtoSPLv85LnUvqH9QosH1VfafJLIK3Q33c5ERQ643iwTCYGq buY/lvfTV7n+P2xfEKoriDujBnvgWhBidSLVu29qRc4PRY8pom/rYVj0B/278AEMLL+M syaQ== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1734391514; x=1734996314; h=to:from:subject:references:mime-version:message-id:in-reply-to:date :x-gm-message-state:from:to:cc:subject:date:message-id:reply-to; bh=FTHl2TPsCH6LymZInluDoB5DdWMc8GssygaKpaKL3WI=; b=WtWZ2dBVznsX7c8HYf6+1gN3pZmQjircHd4fB6rdnE+p8dlD6ZVywbYtWgj60vwNbK 2VJrJsBaKZdVsxSBGIL4AxIidmGd0iZThfRpzz7Yl14u5GPTB35KdQJZ12FtsSx8VOb2 dJntnDguQUefAnYSLYj6zo5Sfre07xarKPAkwPWD3+MauuuQ4fasWN6RdE2MreXVwZXD 9e3P4RTTXbnlsbgzBbYRRjomt895B/djXdUlG85s6O40eFSel7WRjG8e2LrhR5l1Qd/w M73ulccQmDleFRGeGTb2OuNQ6WhcVGQvMy48XVPMXOWPZ+Z2QL6Aydlplrhe7HhoDYP7 PuBg== X-Forwarded-Encrypted: i=1; AJvYcCUlnNQ7hZh/8xwAnL5pulAnELOjW2IjpDSH+UNAKw6mNmRSYx9pa9pHuiLaB5++QHF//R1FU8qOaPzlU/o=@vger.kernel.org X-Gm-Message-State: AOJu0YyEWE+X12pR/4bXbOMAmA1+VGOADQ2OqGKQ8Xx2jrbw0WDmuzlt QCmtPamtyHkV69d0hTBph2tNSHl+r7ARApTVuCX85vMuKKquCiM0J52kMo79rJD7JCaON2wJ0Ug TKTsybQ== X-Google-Smtp-Source: AGHT+IFd1yidZo4+PCjzzLBKzlvBgB+iWRLxaQKGvW8aqa9jBsNOiHI2lkdQ9omQXubeZJj1mM0cO/8DOG7P X-Received: from irogers.svl.corp.google.com ([2620:15c:2c5:11:b850:b916:18b9:17a7]) (user=irogers job=sendgmr) by 2002:a25:aa51:0:b0:e38:9694:4c6e with SMTP id 3f1490d57ef6-e5325f97ca3mr554276.2.1734391514479; Mon, 16 Dec 2024 15:25:14 -0800 (PST) Date: Mon, 16 Dec 2024 15:24:59 -0800 In-Reply-To: <20241216232459.427642-1-irogers@google.com> Message-Id: <20241216232459.427642-6-irogers@google.com> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: Mime-Version: 1.0 References: <20241216232459.427642-1-irogers@google.com> X-Mailer: git-send-email 2.47.1.613.gc27f4b7a9f-goog Subject: [PATCH v3 5/5] perf record: Assert synthesized events are 8-byte aligned From: Ian Rogers To: Peter Zijlstra , Ingo Molnar , Arnaldo Carvalho de Melo , Namhyung Kim , Mark Rutland , Alexander Shishkin , Jiri Olsa , Ian Rogers , Adrian Hunter , Kan Liang , Sun Haiyong , Yanteng Si , linux-perf-users@vger.kernel.org, linux-kernel@vger.kernel.org Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset="utf-8" Capture that events are 8-byte aligned and avoid later misaligned event problems. Signed-off-by: Ian Rogers --- tools/perf/builtin-record.c | 5 ++++- 1 file changed, 4 insertions(+), 1 deletion(-) diff --git a/tools/perf/builtin-record.c b/tools/perf/builtin-record.c index adbaf80b398c..a5689d0e93ad 100644 --- a/tools/perf/builtin-record.c +++ b/tools/perf/builtin-record.c @@ -624,7 +624,10 @@ static int process_synthesized_event(const struct perf= _tool *tool, struct machine *machine __maybe_unused) { struct record *rec =3D container_of(tool, struct record, tool); - return record__write(rec, NULL, event, event->header.size); + size_t size =3D event->header.size; + + assert(PERF_ALIGN(size, sizeof(u64)) =3D=3D size); + return record__write(rec, NULL, event, size); } =20 static struct mutex synth_lock; --=20 2.47.1.613.gc27f4b7a9f-goog