From patchwork Mon Jul 29 09:24:22 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Tony Ambardar X-Patchwork-Id: 815506 Received: from mail-pl1-f181.google.com (mail-pl1-f181.google.com [209.85.214.181]) (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 0A9DC139568; Mon, 29 Jul 2024 09:25:21 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.214.181 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1722245123; cv=none; b=ckyqzDds7TlyJ/zRHc+VQQjOA+5uQCwjKbWRtTSvDbzxbGpG03kVCpCEX+G1KXwifd2k4B6gMbviNb8xcgZrPzF5zsqVmAg6yOWGHkMl4vK0nkD84oB4d8SiUmi4NLxzYyw7nx3jtt9v/QaO1t/tGrX3lO9Cm8C91QMZ4PLGCEM= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1722245123; c=relaxed/simple; bh=S4CH8iGlwN8+2X01xU5p4ifa0Xxtjty5cyPwjOQSZb8=; h=From:To:Cc:Subject:Date:Message-Id:In-Reply-To:References: MIME-Version; b=pOl6iRaHk7KRq8xZ9f8AEuQrLtuMDXLznpV0UG57t6c0fYaCMs4xD5V+KoV4PQ2XBgHMU1LXwrgYnhfMBCZM4NU2+71Is3LhLCQghArQxo1nGdE9bKT8oHWUmxYY5/aBeessTfaVrYtiBE9vdF4nJRkoSz6fN17Z4+vYLEEjAzU= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=gmail.com; spf=pass smtp.mailfrom=gmail.com; dkim=pass (2048-bit key) header.d=gmail.com header.i=@gmail.com header.b=guJPp+3w; arc=none smtp.client-ip=209.85.214.181 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=gmail.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=gmail.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=gmail.com header.i=@gmail.com header.b="guJPp+3w" Received: by mail-pl1-f181.google.com with SMTP id d9443c01a7336-1fd9e70b592so15841475ad.3; Mon, 29 Jul 2024 02:25:21 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20230601; t=1722245121; x=1722849921; darn=vger.kernel.org; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:from:to:cc:subject:date :message-id:reply-to; bh=97RFtqxKV1tDanXoh3iDjlFW9B65/Wlhvry0/woasgU=; b=guJPp+3wKsvXJbTulYrtbwoo09Xly1kZSwsUYjkH4uOHdsvormO9Rw+2uZar7DXYGL 5ZI+JaBlOoNDY1FZNPUE88DOiT87OnYGND1xi5CGLc0qFHO11mo0mI0LJ+1aLS0guLB6 NPQBXhNfiNbLJukLvx8Z9mlRU6OA/csM8Fab5LdwccVte78e7dRn9bEfyBDUqdZqUuMI qGf4jOqKZLVuqrTNwyCoiY01zYX8yoT2YBo2zeeY8LeJLFzbgwl/h1V2rDsoCizXPUOb ErumQw+mymx56D4pCKr+NceG8hTZW4Aow0Xcz7Aw4NeZ5quktkjBtLhHWY+YthSBE+Ns bTjg== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1722245121; x=1722849921; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:x-gm-message-state:from:to:cc :subject:date:message-id:reply-to; bh=97RFtqxKV1tDanXoh3iDjlFW9B65/Wlhvry0/woasgU=; b=hCMbIfPAgE7ay5cp83zlaEamGQcsmuSzSTTU7EUrkQWjROzx7LU8Hj6gqm9r/QAqJr M+pUMxRga2xDUxHDj7OhRlgr9WgkQL6VjwoF30uh/UPlpTzMdoGx1V2J+wuiIr+5ZOZH nDKG5oSlQH4af0+buWNzTrDbgaYmaH8TGRdknUvHEpMCipFB5WwtXLkR5ozyQFM00P73 FxGH0FwbwHhcxdx2xfSFE8gUspypYRWzTOvQcZFcs/6LLLvN3iCGdRLeorxTvjo121bb VoKpvxwohPaFfQyhUl7mCwiV8hrQAyEVYBbfgPouMT+vudYei8kZtePWTHTgkfOHCxpk GVYw== X-Forwarded-Encrypted: i=1; AJvYcCUxCaOQEmwe06qWrxwABM82R6NIhlGWUA27fqTovI36PX7uuA9bZJmG6ODII1Qrvdilxiwjd+NKvvHG/ZTlh4UU+EQHmWcmw9Ch9tmKTTQpS3xgE5PzO6oLL38fQhMzXmS+YrLbIu4N X-Gm-Message-State: AOJu0YwLaXD+31Xh2WFNWUWWWflzs5UAtLOkNuKqajX2ycRpckJMBBw3 TjctHric2OVHISWAr6xzHUcB/x/rUcgpxevDKyjfsXutjKNUmn+l/U1kv2Dy X-Google-Smtp-Source: AGHT+IHp+J1QWRbn/WpF8YMiUiaSgf0ZS8cTUL9W412rawZYWAluLxNaQC6rABvsWFOvil0bWZuJ4w== X-Received: by 2002:a17:902:c40e:b0:1fb:8797:befb with SMTP id d9443c01a7336-1ff047dd2edmr50976205ad.35.1722245121227; Mon, 29 Jul 2024 02:25:21 -0700 (PDT) Received: from localhost.localdomain (69-172-146-21.cable.teksavvy.com. [69.172.146.21]) by smtp.gmail.com with ESMTPSA id d9443c01a7336-1fed7c8c19dsm78119145ad.54.2024.07.29.02.25.20 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Mon, 29 Jul 2024 02:25:20 -0700 (PDT) From: Tony Ambardar To: bpf@vger.kernel.org Cc: Tony Ambardar , linux-kselftest@vger.kernel.org, netdev@vger.kernel.org, Alexei Starovoitov , Daniel Borkmann , Andrii Nakryiko , Martin KaFai Lau , Eduard Zingerman , Song Liu , Yonghong Song , John Fastabend , KP Singh , Stanislav Fomichev , Hao Luo , Jiri Olsa , Mykola Lysenko , Shuah Khan , =?utf-8?b?QmrDtnJuIFTDtnBlbA==?= , Magnus Karlsson , Maciej Fijalkowski , Jonathan Lemon , "David S. Miller" , Yan Zhai Subject: [PATCH bpf-next v2 6/8] selftests/bpf: Fix compile if backtrace support missing in libc Date: Mon, 29 Jul 2024 02:24:22 -0700 Message-Id: X-Mailer: git-send-email 2.34.1 In-Reply-To: References: Precedence: bulk X-Mailing-List: linux-kselftest@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Include GNU header only with glibc and provide weak, stubbed backtrace functions as a fallback in test_progs.c. This allows for non-GNU replacements while avoiding compile errors (e.g. with musl libc) like: test_progs.c:13:10: fatal error: execinfo.h: No such file or directory 13 | #include /* backtrace */ | ^~~~~~~~~~~~ test_progs.c: In function 'crash_handler': test_progs.c:1034:14: error: implicit declaration of function 'backtrace' [-Werror=implicit-function-declaration] 1034 | sz = backtrace(bt, ARRAY_SIZE(bt)); | ^~~~~~~~~ test_progs.c:1045:9: error: implicit declaration of function 'backtrace_symbols_fd' [-Werror=implicit-function-declaration] 1045 | backtrace_symbols_fd(bt, sz, STDERR_FILENO); | ^~~~~~~~~~~~~~~~~~~~ Fixes: 9fb156bb82a3 ("selftests/bpf: Print backtrace on SIGSEGV in test_progs") Signed-off-by: Tony Ambardar --- tools/testing/selftests/bpf/test_progs.c | 16 +++++++++++++++- 1 file changed, 15 insertions(+), 1 deletion(-) diff --git a/tools/testing/selftests/bpf/test_progs.c b/tools/testing/selftests/bpf/test_progs.c index 60c5ec0f6abf..d5d0cb4eb197 100644 --- a/tools/testing/selftests/bpf/test_progs.c +++ b/tools/testing/selftests/bpf/test_progs.c @@ -10,7 +10,6 @@ #include #include #include -#include /* backtrace */ #include /* get_nprocs */ #include #include @@ -19,6 +18,21 @@ #include #include "json_writer.h" +#ifdef __GLIBC__ +#include /* backtrace */ +#endif + +/* Default backtrace funcs if missing at link */ +__weak int backtrace(void **buffer, int size) +{ + return 0; +} + +__weak void backtrace_symbols_fd(void *const *buffer, int size, int fd) +{ + dprintf(fd, "\n"); +} + static bool verbose(void) { return env.verbosity > VERBOSE_NONE;