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h=x-gm-message-state:date:in-reply-to:message-id:mime-version :references:subject:from:to:cc; bh=Nz8aHV39st6C14LfpoASArc0NcKx9jRy4dn2kjWwnX8=; b=AyQurDsS9dJEU4DbA0v/T5M+SOX5oj89d9B3Qf6T2xVqGq+tZELOfGpOgIsADBeehW s207Tc2ZKk7alUdsq4aKUBawliKrc4ifTtKJyVHlACVNKW1cCvxIJyfMQqto0PAa8O8S r3v5i/rE2uh7mJf8V/4awemUQ4CoJZaatt1u93kJL3T+JQcBhW5jr7zhOfQ41TpBoO4C zP3r9FH8VV4/m+haBBOAOiZH0A3npu4fBwbs9+TemVabK6d2OkxsJ1L1vr6tiEpFjJbd vYhZgHagFGF+XjD+6pxXYrUuMKfpxN9HrMgkgK/4P/Jr7CPo8ZFo9bbZXuq5emA/HoOc T7MQ== X-Gm-Message-State: APjAAAVLFv0pmqLTXL2COZ2vy031gi7XMxyoBn1TPUedaCd+XrlM4dAt YC5V8mGSUE0sZ2ezP1v/iRfl9tOJ1vpZZ/4Xz3dPDQ== X-Google-Smtp-Source: APXvYqz0kOQ0kjtDlOHNl7pfytCE13iMAmvjEs4xHUGo47xOC7cuwiN8PWab0JpIXXH5u0DcT8cEF0Ve3SFX6VxWkHAAiw== X-Received: by 2002:a63:e907:: with SMTP id i7mr37161686pgh.84.1563328563771; Tue, 16 Jul 2019 18:56:03 -0700 (PDT) Date: Tue, 16 Jul 2019 18:55:29 -0700 In-Reply-To: <20190717015543.152251-1-brendanhiggins@google.com> Message-Id: <20190717015543.152251-5-brendanhiggins@google.com> Mime-Version: 1.0 References: <20190717015543.152251-1-brendanhiggins@google.com> X-Mailer: git-send-email 2.22.0.510.g264f2c817a-goog Subject: [PATCH v11 04/18] kunit: test: add kunit_stream a std::stream like logger From: Brendan Higgins To: frowand.list@gmail.com, gregkh@linuxfoundation.org, jpoimboe@redhat.com, keescook@google.com, kieran.bingham@ideasonboard.com, mcgrof@kernel.org, peterz@infradead.org, robh@kernel.org, sboyd@kernel.org, shuah@kernel.org, tytso@mit.edu, yamada.masahiro@socionext.com X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20190716_185606_372929_FF2FE7F8 X-CRM114-Status: GOOD ( 19.05 ) X-Spam-Score: -7.7 (-------) X-Spam-Report: SpamAssassin version 3.4.2 on bombadil.infradead.org summary: Content analysis details: (-7.7 points) pts rule name description ---- ---------------------- -------------------------------------------------- -0.0 RCVD_IN_DNSWL_NONE RBL: Sender listed at https://www.dnswl.org/, no trust [2607:f8b0:4864:20:0:0:0:649 listed in] [list.dnswl.org] -7.5 USER_IN_DEF_DKIM_WL From: address is in the default DKIM white-list -0.0 SPF_PASS SPF: sender matches SPF record 0.0 SPF_HELO_NONE SPF: HELO does not publish an SPF Record -0.1 DKIM_VALID Message has at least one valid DKIM or DK signature -0.1 DKIM_VALID_AU Message has a valid DKIM or DK signature from author's domain -0.1 DKIM_VALID_EF Message has a valid DKIM or DK signature from envelope-from domain 0.1 DKIM_SIGNED Message has a DKIM or DK signature, not necessarily valid -0.0 DKIMWL_WL_MED DKIMwl.org - Medium sender X-BeenThere: linux-um@lists.infradead.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: pmladek@suse.com, linux-doc@vger.kernel.org, amir73il@gmail.com, Brendan Higgins , dri-devel@lists.freedesktop.org, Alexander.Levin@microsoft.com, linux-kselftest@vger.kernel.org, linux-nvdimm@lists.01.org, khilman@baylibre.com, knut.omang@oracle.com, wfg@linux.intel.com, joel@jms.id.au, rientjes@google.com, jdike@addtoit.com, dan.carpenter@oracle.com, devicetree@vger.kernel.org, linux-kbuild@vger.kernel.org, Tim.Bird@sony.com, linux-um@lists.infradead.org, rostedt@goodmis.org, julia.lawall@lip6.fr, kunit-dev@googlegroups.com, richard@nod.at, rdunlap@infradead.org, linux-kernel@vger.kernel.org, daniel@ffwll.ch, mpe@ellerman.id.au, linux-fsdevel@vger.kernel.org, logang@deltatee.com Sender: "linux-um" Errors-To: linux-um-bounces+incoming=patchwork.ozlabs.org@lists.infradead.org A lot of the expectation and assertion infrastructure prints out fairly complicated test failure messages, so add a C++ style log library for for logging test results called `struct kunit_stream`. kunit_stream allows us to construct a message before we know whether we want to print it out; this can be extremely handy if there is information you might need for a failure message that is easiest to collect in the steps leading up to the actual check. Note that kunit_stream is distinct from string_stream: whereas string_stream is really just a string builder, kunit_stream is specifically used for constructing expectation/assertion (introduced later in this series) messages to a user of KUnit. Signed-off-by: Brendan Higgins Reviewed-by: Greg Kroah-Hartman Reviewed-by: Logan Gunthorpe --- include/kunit/kunit-stream.h | 97 +++++++++++++++++++++++++++++ include/kunit/test.h | 3 + kunit/Makefile | 3 +- kunit/kunit-stream.c | 115 +++++++++++++++++++++++++++++++++++ kunit/test.c | 6 ++ 5 files changed, 223 insertions(+), 1 deletion(-) create mode 100644 include/kunit/kunit-stream.h create mode 100644 kunit/kunit-stream.c diff --git a/include/kunit/kunit-stream.h b/include/kunit/kunit-stream.h new file mode 100644 index 0000000000000..ba0ff553b8301 --- /dev/null +++ b/include/kunit/kunit-stream.h @@ -0,0 +1,97 @@ +/* SPDX-License-Identifier: GPL-2.0 */ +/* + * C++ stream style string formatter and printer used in KUnit for outputting + * KUnit messages. + * + * Copyright (C) 2019, Google LLC. + * Author: Brendan Higgins + */ + +#ifndef _KUNIT_KUNIT_STREAM_H +#define _KUNIT_KUNIT_STREAM_H + +#include +#include + +struct kunit; + +/** + * struct kunit_stream - a std::stream style string builder. + * + * A std::stream style string builder. Allows messages to be built up and + * printed all at once. Note that the intention is to only use + * &struct kunit_stream to communicate with a user of KUnit, most often to + * communicate something about an expectation or an assertion to the user. If + * you want a similar interface, but aren't sure if this is the right class for + * you to use, you probably want to use the related string_stream class, which + * is allowed for generic string construction in a similar manner. This class is + * really only for the KUnit library to communicate certain kinds of information + * to KUnit users and should not be used by anyone else. + * + * A note on &struct kunit_stream's usage: a kunit_stream will generally + * accompany *one* expectation or assertion. Multiple expectations/assertions + * may be validated concurrently at any given time, even within a single test + * case, so sharing a kunit_stream between expectations/assertions may result in + * unintended consequences. + */ +struct kunit_stream { + /* private: internal use only. */ + struct kunit *test; + const char *level; + struct string_stream *internal_stream; +}; + +/** + * alloc_kunit_stream() - constructs a new &struct kunit_stream. + * @test: The test context object. + * @level: The log level at which to print out the message. + * @gfp: The GFP flags to use for internal allocations. + * + * Constructs a new test managed &struct kunit_stream. + */ +struct kunit_stream *alloc_kunit_stream(struct kunit *test, + const char *level, + gfp_t gfp); + +/** + * kunit_stream_add(): adds the formatted input to the internal buffer. + * @kstream: the stream being operated on. + * @fmt: printf style format string to append to stream. + * + * Appends the formatted string, @fmt, to the internal buffer. + */ +void __printf(2, 3) kunit_stream_add(struct kunit_stream *kstream, + const char *fmt, ...); + +/** + * kunit_stream_append(): appends the contents of @other to @kstream. + * @kstream: the stream to which @other is appended. + * @other: the stream whose contents are appended to @kstream. + * + * Appends the contents of @other to @kstream. + */ +void kunit_stream_append(struct kunit_stream *kstream, + struct kunit_stream *other); + +/** + * kunit_stream_commit(): prints out the internal buffer to the user. + * @kstream: the stream being operated on. + * + * Outputs the contents of the internal buffer as a kunit_printk formatted + * output. KUNIT_STREAM ONLY OUTPUTS ITS BUFFER TO THE USER IF COMMIT IS + * CALLED!!! The reason for this is that it allows us to construct a message + * before we know whether we want to print it out; this can be extremely handy + * if there is information you might need for a failure message that is easiest + * to collect in the steps leading up to the actual check. + */ +void kunit_stream_commit(struct kunit_stream *kstream); + +/** + * kunit_stream_clear(): clears the internal buffer. + * @kstream: the stream being operated on. + * + * Clears the contents of the internal buffer. + */ +void kunit_stream_clear(struct kunit_stream *kstream); + +#endif /* _KUNIT_KUNIT_STREAM_H */ diff --git a/include/kunit/test.h b/include/kunit/test.h index d0bf112910caf..4b6e7d91afd34 100644 --- a/include/kunit/test.h +++ b/include/kunit/test.h @@ -11,6 +11,7 @@ #include #include +#include struct kunit_resource; @@ -184,6 +185,8 @@ struct kunit { void kunit_init_test(struct kunit *test, const char *name); +void kunit_fail(struct kunit *test, struct kunit_stream *stream); + int kunit_run_tests(struct kunit_suite *suite); /** diff --git a/kunit/Makefile b/kunit/Makefile index 275b565a0e81f..6ddc622ee6b1c 100644 --- a/kunit/Makefile +++ b/kunit/Makefile @@ -1,2 +1,3 @@ obj-$(CONFIG_KUNIT) += test.o \ - string-stream.o + string-stream.o \ + kunit-stream.o diff --git a/kunit/kunit-stream.c b/kunit/kunit-stream.c new file mode 100644 index 0000000000000..42fcef8188b3a --- /dev/null +++ b/kunit/kunit-stream.c @@ -0,0 +1,115 @@ +// SPDX-License-Identifier: GPL-2.0 +/* + * C++ stream style string formatter and printer used in KUnit for outputting + * KUnit messages. + * + * Copyright (C) 2019, Google LLC. + * Author: Brendan Higgins + */ + +#include +#include +#include + +void kunit_stream_add(struct kunit_stream *kstream, const char *fmt, ...) +{ + va_list args; + struct string_stream *stream = kstream->internal_stream; + + va_start(args, fmt); + + if (string_stream_vadd(stream, fmt, args)) + kunit_err(kstream->test, + "Failed to allocate fragment: %s\n", + fmt); + + va_end(args); +} + +void kunit_stream_append(struct kunit_stream *kstream, + struct kunit_stream *other) +{ + int ret; + + ret = string_stream_append(kstream->internal_stream, + other->internal_stream); + + if (ret) + kunit_err(kstream->test, + "Failed to append other stream: %d\n", ret); +} + +void kunit_stream_clear(struct kunit_stream *kstream) +{ + string_stream_clear(kstream->internal_stream); +} + +void kunit_stream_commit(struct kunit_stream *kstream) +{ + struct string_stream *stream = kstream->internal_stream; + struct string_stream_fragment *fragment; + struct kunit *test = kstream->test; + char *buf; + + buf = string_stream_get_string(stream); + if (!buf) { + kunit_err(test, + "Could not allocate buffer, dumping stream:\n"); + list_for_each_entry(fragment, &stream->fragments, node) { + kunit_err(test, fragment->fragment); + } + kunit_err(test, "\n"); + } else { + kunit_printk(kstream->level, test, buf); + } + + kunit_stream_clear(kstream); +} + +struct kunit_stream_alloc_context { + struct kunit *test; + const char *level; + gfp_t gfp; +}; + +static int kunit_stream_init(struct kunit_resource *res, void *context) +{ + struct kunit_stream_alloc_context *ctx = context; + struct kunit_stream *stream; + + stream = kunit_kzalloc(ctx->test, sizeof(*stream), ctx->gfp); + if (!stream) + return -ENOMEM; + + res->allocation = stream; + stream->test = ctx->test; + stream->level = ctx->level; + stream->internal_stream = alloc_string_stream(ctx->test, ctx->gfp); + + if (!stream->internal_stream) + return -ENOMEM; + + return 0; +} + +static void kunit_stream_free(struct kunit_resource *res) +{ + /* Do nothing because cleanup is handled by KUnit managed resources */ +} + +struct kunit_stream *alloc_kunit_stream(struct kunit *test, + const char *level, + gfp_t gfp) +{ + struct kunit_stream_alloc_context ctx = { + .test = test, + .level = level, + .gfp = gfp + }; + + return kunit_alloc_resource(test, + kunit_stream_init, + kunit_stream_free, + gfp, + &ctx); +} diff --git a/kunit/test.c b/kunit/test.c index 4c178a817f2fe..fdab07bb0b529 100644 --- a/kunit/test.c +++ b/kunit/test.c @@ -120,6 +120,12 @@ static void kunit_print_test_case_ok_not_ok(struct kunit_case *test_case, test_case->name); } +void kunit_fail(struct kunit *test, struct kunit_stream *stream) +{ + kunit_set_failure(test); + kunit_stream_commit(stream); +} + void kunit_init_test(struct kunit *test, const char *name) { spin_lock_init(&test->lock);