From nobody Thu Sep 19 01:42:57 2024 Received: from mail-yw1-f201.google.com (mail-yw1-f201.google.com [209.85.128.201]) (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 094F438DCC for ; Wed, 21 Feb 2024 03:42:12 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.128.201 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1708486934; cv=none; b=SyzAYYWGtdqww8T1QvZEH96pfbgoaNfYxKcGWzhQAj+Bx+5y8ouHdlYs8QtRqqApIvDXcbIfq4KmVpqLem4hCxuchAs6I4y+KibgUhYmpTXESuI5lE/kMOTxajt6SmfHFhP7XsuaZ4oHOYs4Ux7RGSjR48PP5mgd/4Ouz6ZPAK4= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1708486934; c=relaxed/simple; bh=nIwADbFncYymlWUg/R60jRadSx8+xe1bkn0KEBii9rU=; h=Date:In-Reply-To:Message-Id:Mime-Version:References:Subject:From: To:Content-Type; b=aU05VRF3cspvmfriS9PWeSYJTXvqcdQy5N4yVrZoVEDqB7+2/Ikr5M3utOAuYFEZj4M4+0d1te64tUim3uCASocKtReGx72PKL5AAjhT2oBigNmBObFZIFGbZOnxJXeNNw9e9k84GfrecVLWcHI3v8Zd+OjFj4GalTJ+ZvDNEJA= 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=h3bnIIED; arc=none smtp.client-ip=209.85.128.201 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="h3bnIIED" Received: by mail-yw1-f201.google.com with SMTP id 00721157ae682-6081639fecfso41735927b3.1 for ; Tue, 20 Feb 2024 19:42:12 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=20230601; t=1708486932; x=1709091732; 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=eF36kSIEMlGOGF+Ru4Ee+ArAeIU+1BDlU+YfXMm89FI=; b=h3bnIIEDWRDfKD/YMR00cbHb9S5+to8IdxcG+rp2/cD33J5Rqai7CqWB3pkNS+9ILI +1fMJ3foXETnFYJhMICrxS6uy3cYGIPqwvb92Mv1ZkXgN734XZP4igLGLSUANfrxcus4 hOovDO3gRWuoMCNEdivgzGzsJM9FBUPaugc0fTcnSRtSItvvg7Dla6Qxm22LLl7MYa2N fegE7djwCJP418WFzc4M75C2H7QwTPg/Dk4E/MtBGY0prZUdeOndGof3+GtyTCXp6JXO ICmMHxT33+SOgDb933qi0nzWrW4UMK9W3Sai9royTTQ5ko7A6SxjyC6CJ+BqPoTNKuAr re4Q== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1708486932; x=1709091732; 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=eF36kSIEMlGOGF+Ru4Ee+ArAeIU+1BDlU+YfXMm89FI=; b=FdOnP9PGLF+4sQg90fgnxhgLDxUbBVtBQxnIXW4sPHIltvGzrxKCibtDyFU2TUnJ3p BTTC6xaehr5Lz+odXcX1s8Dz9MpaDcg5XLHEKgjsi5J97ubn+OQB+BJljVfuw2eHBo4F YTnRZPNSnp7drKgcD13qEhzI4TvGH09MNTm8KKl0PDk5I0WPedTeYsio2UVy0sZSBNuN vnZr0mHq2EYOt5wH75Tocc4xKX77RmY8ghRl0LqKywXTdH9oyB1gFzsVq2Y75J71SQOi PyFHFrQAhNFu+XH66rSczt68txYv+XMjxoFB8M90bHsp1HSE5rxCg8VwDRRpuFkA2NGo uV3Q== X-Forwarded-Encrypted: i=1; AJvYcCXEpGu1RdLgJYVqSQyQnNlMLjlbJPebtgDHJgQMbuAo4TUAriQz/SDfrXfBDoHj/C/yNWzu/iLC9GIHDIzlWXUiJz85xL4Rn//yNWHf X-Gm-Message-State: AOJu0YwHwJ6v7h0mD/bu3MfB/vWwa4BGvqvmZQScvE2ShJjo4UzFcOOC UIsWi3qN8pwnentRxQb057k4ssgUcu1eMxk95E5nY6awYvlsxpHT0BQYXYaFPLXDnLGTNJcGAeh 5lIl8xQ== X-Google-Smtp-Source: AGHT+IE/on57IS2xafUtNQKU7p+VrGTBQkCYynjxRso5yRXY1KPrBnnB3HTy5IyNKzr/8fPp2V2mhgp0xx+K X-Received: from irogers.svl.corp.google.com ([2620:15c:2a3:200:3c02:f882:5876:b7ab]) (user=irogers job=sendgmr) by 2002:a05:6902:704:b0:dc7:6f13:61d9 with SMTP id k4-20020a056902070400b00dc76f1361d9mr660785ybt.4.1708486932038; Tue, 20 Feb 2024 19:42:12 -0800 (PST) Date: Tue, 20 Feb 2024 19:41:51 -0800 In-Reply-To: <20240221034155.1500118-1-irogers@google.com> Message-Id: <20240221034155.1500118-5-irogers@google.com> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: Mime-Version: 1.0 References: <20240221034155.1500118-1-irogers@google.com> X-Mailer: git-send-email 2.44.0.rc0.258.g7320e95886-goog Subject: [PATCH v6 4/8] tools subcmd: Add a no exec function call option From: Ian Rogers To: Peter Zijlstra , Ingo Molnar , Arnaldo Carvalho de Melo , Namhyung Kim , Mark Rutland , Alexander Shishkin , Jiri Olsa , Ian Rogers , Adrian Hunter , Nathan Chancellor , Nick Desaulniers , Bill Wendling , Justin Stitt , Athira Jajeev , James Clark , Kan Liang , Yang Jihong , linux-kernel@vger.kernel.org, linux-perf-users@vger.kernel.org, llvm@lists.linux.dev Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset="utf-8" Tools like perf fork tests in case they crash, but they don't want to exec a full binary. Add an option to call a function rather than do an exec. The child process exits with the result of the function call and is passed the struct of the run_command, things like container_of can then allow the child process function to determine additional arguments. Signed-off-by: Ian Rogers --- tools/lib/subcmd/run-command.c | 2 ++ tools/lib/subcmd/run-command.h | 2 ++ 2 files changed, 4 insertions(+) diff --git a/tools/lib/subcmd/run-command.c b/tools/lib/subcmd/run-command.c index 5cdac2162532..d435eb42354b 100644 --- a/tools/lib/subcmd/run-command.c +++ b/tools/lib/subcmd/run-command.c @@ -122,6 +122,8 @@ int start_command(struct child_process *cmd) } if (cmd->preexec_cb) cmd->preexec_cb(); + if (cmd->no_exec_cmd) + exit(cmd->no_exec_cmd(cmd)); if (cmd->exec_cmd) { execv_cmd(cmd->argv); } else { diff --git a/tools/lib/subcmd/run-command.h b/tools/lib/subcmd/run-command.h index 17d969c6add3..d794138a797f 100644 --- a/tools/lib/subcmd/run-command.h +++ b/tools/lib/subcmd/run-command.h @@ -47,6 +47,8 @@ struct child_process { unsigned exec_cmd:1; /* if this is to be external sub-command */ unsigned stdout_to_stderr:1; void (*preexec_cb)(void); + /* If set, call function in child rather than doing an exec. */ + int (*no_exec_cmd)(struct child_process *process); }; =20 int start_command(struct child_process *); --=20 2.44.0.rc0.258.g7320e95886-goog