From patchwork Thu Nov 14 21:50:32 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Patchwork-Submitter: =?utf-8?q?Alexis_Lothor=C3=A9?= X-Patchwork-Id: 13875640 Received: from relay7-d.mail.gandi.net (relay7-d.mail.gandi.net [217.70.183.200]) (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 9048A18C018; Thu, 14 Nov 2024 21:51:13 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=217.70.183.200 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1731621076; cv=none; b=O9f5ROqxgKYXrbWdVTjMTN3SL/63vgjLXsBmHilNTAW9pkpMT96uWKLUWqGAvIfI+RiOsr+s3jmNbkNPauZikw7kJH4BTT4ItLps3gfMSt8ZTRUkyhd0BMDtHeUUOqA2FkADiS0Dl5pIjafncHKaBIynRvzp7CGFZNcr8piEAvw= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1731621076; c=relaxed/simple; bh=1t1L2fnVkHEpBKMvQjhX3AMa3i/cLMZbS5Onl55h1cs=; h=From:Date:Subject:MIME-Version:Content-Type:Message-Id:References: In-Reply-To:To:Cc; b=No14qKxtL7vlgxP3orkYtMYwEeyE6Ap4p1JCpIDMD6qZIKqgqcFMglTYvu2qmvcPNwKCwJb2izpRFARktbekSjA9Wf3LOsFsrRtVSw94onrAIp8CEngOLZvcaiyiYzYzW/jPx5Mdm1ngZMQEupu7fk8i0uutV+OzNoFyYg5nGuE= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=pass (p=reject dis=none) header.from=bootlin.com; spf=pass smtp.mailfrom=bootlin.com; dkim=pass (2048-bit key) header.d=bootlin.com header.i=@bootlin.com header.b=enXEuR2z; arc=none smtp.client-ip=217.70.183.200 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=reject dis=none) header.from=bootlin.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=bootlin.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=bootlin.com header.i=@bootlin.com header.b="enXEuR2z" Received: by mail.gandi.net (Postfix) with ESMTPSA id 6FCD020005; Thu, 14 Nov 2024 21:51:10 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=bootlin.com; s=gm1; t=1731621071; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version:content-type:content-type: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=fwz6RETh+fhCt/zj4uR0f8EdtVk3n3gmgQD8Cbkbcp8=; b=enXEuR2zIPsMCS8yCGwj1v9+VC2+mtsk4YYMQ9wWGe2k7Ucj2gQgz0Li3HUqepq2acJt3y MTKMLHuFraO09SnYRMtiq+jBYQcx6tMpLfU39IQvgwiAtPdkeYzFvN7bbslyuiW4L7BJL4 NBUY5+Z1kqNcqBEJPABdtljxLWoKN5tqNKJP6rISI4TRVFN34ErqhtZi88wpsvlQCspcrm bdzXH4/6LL5uLdmU0mWU68P+fTocyURNwtAaUu/tluXoE7lz6I3mAfvt9Eb/+UYPxl4pMk SnzzFFNU53uQMVBcOKfZgCqj86PICU20giV7zYXQNsMlWjr2fwnENVUNsV00/w== From: =?utf-8?q?Alexis_Lothor=C3=A9_=28eBPF_Foundation=29?= Date: Thu, 14 Nov 2024 22:50:32 +0100 Subject: [PATCH bpf-next v2 01/13] selftests/bpf: add a macro to compare raw memory Precedence: bulk X-Mailing-List: linux-kselftest@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Message-Id: <20241114-flow_dissector-v2-1-ee4a3be3de65@bootlin.com> References: <20241114-flow_dissector-v2-0-ee4a3be3de65@bootlin.com> In-Reply-To: <20241114-flow_dissector-v2-0-ee4a3be3de65@bootlin.com> To: Andrii Nakryiko , Eduard Zingerman , Mykola Lysenko , Alexei Starovoitov , Daniel Borkmann , Martin KaFai Lau , Song Liu , Yonghong Song , John Fastabend , KP Singh , Stanislav Fomichev , Hao Luo , Jiri Olsa , Shuah Khan , "David S. Miller" , Jakub Kicinski , Jesper Dangaard Brouer Cc: ebpf@linuxfoundation.org, Thomas Petazzoni , Bastien Curutchet , bpf@vger.kernel.org, linux-kselftest@vger.kernel.org, linux-kernel@vger.kernel.org, netdev@vger.kernel.org, =?utf-8?q?Alexis_Lothor=C3=A9_=28eBPF_Foundation?= =?utf-8?q?=29?= X-Mailer: b4 0.14.2 X-GND-Sasl: alexis.lothore@bootlin.com We sometimes need to compare whole structures in an assert. It is possible to use the existing macros on each field, but when the whole structure has to be checked, it is more convenient to simply compare the whole structure memory Add a dedicated assert macro, ASSERT_MEMEQ, to allow bare memory comparision The output generated by this new macro looks like the following: [...] run_tests_skb_less:FAIL:returned flow keys unexpected memory mismatch actual: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 expected: 0E 00 3E 00 DD 86 01 01 00 06 86 DD 50 00 90 1F 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 01 00 00 00 00 00 00 00 [...] Signed-off-by: Alexis Lothoré (eBPF Foundation) Acked-by: Stanislav Fomichev --- Changes in v2: - replace DUMP_BUFFER with a real function - make this function take a prefix - add formatting example in the commit message --- tools/testing/selftests/bpf/test_progs.c | 15 +++++++++++++++ tools/testing/selftests/bpf/test_progs.h | 15 +++++++++++++++ 2 files changed, 30 insertions(+) diff --git a/tools/testing/selftests/bpf/test_progs.c b/tools/testing/selftests/bpf/test_progs.c index 6088d8222d5905c3df6e6ebfb095c6bc5bf22399..c9e745d49493e594b55d79ac26061b0466f9a039 100644 --- a/tools/testing/selftests/bpf/test_progs.c +++ b/tools/testing/selftests/bpf/test_progs.c @@ -1282,6 +1282,21 @@ void crash_handler(int signum) backtrace_symbols_fd(bt, sz, STDERR_FILENO); } +void hexdump(const char *prefix, const void *buf, size_t len) +{ + for (int i = 0; i < len; i++) { + if (!(i % 16)) { + if (i) + fprintf(stdout, "\n"); + fprintf(stdout, "%s", prefix); + } + if (i && !(i % 8) && (i % 16)) + fprintf(stdout, "\t"); + fprintf(stdout, "%02X ", ((uint8_t *)(buf))[i]); + } + fprintf(stdout, "\n"); +} + static void sigint_handler(int signum) { int i; diff --git a/tools/testing/selftests/bpf/test_progs.h b/tools/testing/selftests/bpf/test_progs.h index 74de33ae37e56c90646cd1e0bb58ed7e3f345ec0..404d0d4915d54fe15f6c33dbabdb58cccc3b2781 100644 --- a/tools/testing/selftests/bpf/test_progs.h +++ b/tools/testing/selftests/bpf/test_progs.h @@ -185,6 +185,7 @@ void test__end_subtest(void); void test__skip(void); void test__fail(void); int test__join_cgroup(const char *path); +void hexdump(const char *prefix, const void *buf, size_t len); #define PRINT_FAIL(format...) \ ({ \ @@ -344,6 +345,20 @@ int test__join_cgroup(const char *path); ___ok; \ }) +#define ASSERT_MEMEQ(actual, expected, len, name) ({ \ + static int duration = 0; \ + const void *__act = actual; \ + const void *__exp = expected; \ + int __len = len; \ + bool ___ok = memcmp(__act, __exp, __len) == 0; \ + CHECK(!___ok, (name), "unexpected memory mismatch\n"); \ + fprintf(stdout, "actual:\n"); \ + hexdump("\t", __act, __len); \ + fprintf(stdout, "expected:\n"); \ + hexdump("\t", __exp, __len); \ + ___ok; \ +}) + #define ASSERT_OK(res, name) ({ \ static int duration = 0; \ long long ___res = (res); \