From patchwork Wed Apr 3 13:19:22 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Guenter Roeck X-Patchwork-Id: 13616083 Received: from mail-pj1-f48.google.com (mail-pj1-f48.google.com [209.85.216.48]) (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 CE1F3147C96; Wed, 3 Apr 2024 13:19:44 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.216.48 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1712150386; cv=none; b=in2JAEtpNEXxhkntOpj9Cc7xiSa48yzENKMO4TA2x3NNx8nqTIZjBUOf8CF7EjkoBsDkWphbOA47+UDRlME5YhyicPav/64ycc9j603TllJB32SaA8Zk0elUJWWykeyXuUZIxK6MtT8p2sRAFg+f+8OoNRk/MhJyMyEaTP7TQrc= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1712150386; c=relaxed/simple; bh=hSW4BLkU0VtrY+14wpvjbk+6yBnorhMiRVVMWx2qUGA=; h=From:To:Cc:Subject:Date:Message-Id:In-Reply-To:References: MIME-Version; b=AAC6b1gp/ruWeUo0jwcR0AMXOVY7k0vzbMwA8gK/p8gPCQMU9OKFDWQggUFAyVZ6VaF8aAriHDOxJxQ68JnhMIk7IPL4fckpOADWMM/LUpkhr16fXAVUtFe4IKBdJb5NFYhO89JW+h4wYhxqL78QA6opJOF3fHM0LZEXYMu8yrk= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=none (p=none dis=none) header.from=roeck-us.net; spf=pass smtp.mailfrom=gmail.com; dkim=pass (2048-bit key) header.d=gmail.com header.i=@gmail.com header.b=a+vOuSqj; arc=none smtp.client-ip=209.85.216.48 Authentication-Results: smtp.subspace.kernel.org; dmarc=none (p=none dis=none) header.from=roeck-us.net 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="a+vOuSqj" Received: by mail-pj1-f48.google.com with SMTP id 98e67ed59e1d1-2a274955aacso1172703a91.2; Wed, 03 Apr 2024 06:19:44 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20230601; t=1712150384; x=1712755184; darn=vger.kernel.org; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:sender:from:to:cc:subject:date :message-id:reply-to; bh=QLppDGinW0QyvnpiYq8klDjFNvdzQ2Nr+inin7jIp4I=; b=a+vOuSqjh3SIiEfb2itCich48Fl10ulBBjaxOKmNMSoKhq7wBiiagZTl6cSH0UcrGk KUnZV2yUNvMwrbxiJ737lS1mbUQrZ2DYu5/abCH2NFSNUPpb70ktyVXtzbTaPs9tnonU Nu95t9R6eaDRuHmKBikutWWLt0X0A29gnWdawYliLMPagrggOq4G8iTIRIPXXNeni+7Z 8jnfvM2RknKhHHaHBF6YFeTrkP2GR3PNixeY3dCK5yVPveNpF3sSkT8+kAnErI3CTfj/ 3RHp+QuiWht5bb4LEgz+m4HD5Xukne6geQ+JIYtvApiyZdawdFmDe8NFiaP61k69xR1o aYag== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1712150384; x=1712755184; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:sender:x-gm-message-state:from :to:cc:subject:date:message-id:reply-to; bh=QLppDGinW0QyvnpiYq8klDjFNvdzQ2Nr+inin7jIp4I=; b=C8JDmrIIHVwuWacyPb3jhlvCo6qi3P/LJv5jJ22+eDa2PApbgS1tOVVJFmzL/EXyIN Vv4HFAdh4QUzEU2SnXDSmGjl0eHFtAmgtKO6GKhX7osfXys2zhHBCABrrxyjUY347x2a sl9nffz3Dr3F3GWE4HFJnzMBiS6aI+Vkdlkh/j6s0053mCEF73mqUEO/z0fl2Ky1YQS9 T1tFSCdwQ/EO87mo3jQb7KiBzDgBgp6iOiklT4N/J9JwCqzHBD9Gho2Ma5r4ees2LlAJ AdnQPoHFM3WSope203Z6UO4MjMc/x/+CmwFjvEasAtkZjwhTXD2iT0uSx6ilCvL1njmd 6CkQ== X-Forwarded-Encrypted: i=1; AJvYcCXsFSew7FSnz+WTKF/aPmODxzQhuaQFnUBWwDHbBu0KC2VxBwUrmiuhWJN1wKyJYgoXdRaYaTScn9hJhl4P/Kv6FsyiOyJ87WDIi3MXITMv4S4u3JKz9FP4ADz8p+KYVrYiZ161bxFP4Y34huOg2BxjlAbYtETLzv45oNnfbL80M1ayK7quCQVPbE165LXG32djdUNAGFjD/bt6o0spyxWICb+OvHPVhMIfK59k45JCQLurVx9Uk4OKps1bwkT/z8vLvbN/3BZYeB57Ra6SYl+B5KaVvLQ1O8pmdvENYsHGGcKAcTicKXwDXHy5Ng6Pww== X-Gm-Message-State: AOJu0Yw1z+lCFFqxDpKl4uHq+4QbEf1PqOSCHRC6tPIzZqkG4ddTGKHM vp3I+LxtbhqRvy45vEo/X2Wr00arVRjtdOVc6Kilxpljaw0PS4lFyjWDIPJ+ X-Google-Smtp-Source: AGHT+IHLZzwj8QjdIOumZZwMTdNJboOCUuRmYTlmuXcu4rWvyLRFqzzHLCDPQsEEK1PiSQ2OkIhUJQ== X-Received: by 2002:a17:90a:e691:b0:29c:7544:54df with SMTP id s17-20020a17090ae69100b0029c754454dfmr13682150pjy.23.1712150383662; Wed, 03 Apr 2024 06:19:43 -0700 (PDT) Received: from server.roeck-us.net ([2600:1700:e321:62f0:329c:23ff:fee3:9d7c]) by smtp.gmail.com with ESMTPSA id k6-20020a17090a658600b0029bc1c931d9sm13588667pjj.51.2024.04.03.06.19.42 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Wed, 03 Apr 2024 06:19:42 -0700 (PDT) Sender: Guenter Roeck From: Guenter Roeck To: linux-kselftest@vger.kernel.org Cc: David Airlie , Arnd Bergmann , =?utf-8?q?Ma=C3=ADra_Canal?= , Dan Carpenter , Kees Cook , Daniel Diaz , David Gow , Arthur Grillo , Brendan Higgins , Naresh Kamboju , Maarten Lankhorst , Andrew Morton , Maxime Ripard , =?utf-8?b?VmlsbGUgU3lyasOkbMOk?= , Daniel Vetter , Thomas Zimmermann , dri-devel@lists.freedesktop.org, kunit-dev@googlegroups.com, linux-arch@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-doc@vger.kernel.org, linux-kernel@vger.kernel.org, linux-parisc@vger.kernel.org, linuxppc-dev@lists.ozlabs.org, linux-riscv@lists.infradead.org, linux-s390@vger.kernel.org, linux-sh@vger.kernel.org, loongarch@lists.linux.dev, netdev@vger.kernel.org, x86@kernel.org, Guenter Roeck , Linux Kernel Functional Testing Subject: [PATCH v3 01/15] bug/kunit: Core support for suppressing warning backtraces Date: Wed, 3 Apr 2024 06:19:22 -0700 Message-Id: <20240403131936.787234-2-linux@roeck-us.net> X-Mailer: git-send-email 2.39.2 In-Reply-To: <20240403131936.787234-1-linux@roeck-us.net> References: <20240403131936.787234-1-linux@roeck-us.net> Precedence: bulk X-Mailing-List: linux-parisc@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Some unit tests intentionally trigger warning backtraces by passing bad parameters to API functions. Such unit tests typically check the return value from those calls, not the existence of the warning backtrace. Such intentionally generated warning backtraces are neither desirable nor useful for a number of reasons. - They can result in overlooked real problems. - A warning that suddenly starts to show up in unit tests needs to be investigated and has to be marked to be ignored, for example by adjusting filter scripts. Such filters are ad-hoc because there is no real standard format for warnings. On top of that, such filter scripts would require constant maintenance. One option to address problem would be to add messages such as "expected warning backtraces start / end here" to the kernel log. However, that would again require filter scripts, it might result in missing real problematic warning backtraces triggered while the test is running, and the irrelevant backtrace(s) would still clog the kernel log. Solve the problem by providing a means to identify and suppress specific warning backtraces while executing test code. Since the new functionality results in an image size increase of about 1% if CONFIG_KUNIT is enabled, provide configuration option KUNIT_SUPPRESS_BACKTRACE to be able to disable the new functionality. This option is by default enabled since almost all systems with CONFIG_KUNIT enabled will want to benefit from it. Cc: Dan Carpenter Cc: Daniel Diaz Cc: Naresh Kamboju Cc: Kees Cook Tested-by: Linux Kernel Functional Testing Acked-by: Dan Carpenter Reviewed-by: Kees Cook Signed-off-by: Guenter Roeck --- v2: - Rebased to v6.9-rc1 - Added Tested-by:, Acked-by:, and Reviewed-by: tags - Added CONFIG_KUNIT_SUPPRESS_BACKTRACE configuration option, enabled by default v3: - Rebased to v6.9-rc2 include/asm-generic/bug.h | 16 +++++++++--- include/kunit/bug.h | 51 +++++++++++++++++++++++++++++++++++++++ include/kunit/test.h | 1 + include/linux/bug.h | 13 ++++++++++ lib/bug.c | 51 ++++++++++++++++++++++++++++++++++++--- lib/kunit/Kconfig | 9 +++++++ lib/kunit/Makefile | 6 +++-- lib/kunit/bug.c | 40 ++++++++++++++++++++++++++++++ 8 files changed, 178 insertions(+), 9 deletions(-) create mode 100644 include/kunit/bug.h create mode 100644 lib/kunit/bug.c diff --git a/include/asm-generic/bug.h b/include/asm-generic/bug.h index 6e794420bd39..c170b6477689 100644 --- a/include/asm-generic/bug.h +++ b/include/asm-generic/bug.h @@ -18,6 +18,7 @@ #endif #ifndef __ASSEMBLY__ +#include #include #include @@ -39,8 +40,14 @@ struct bug_entry { #ifdef CONFIG_DEBUG_BUGVERBOSE #ifndef CONFIG_GENERIC_BUG_RELATIVE_POINTERS const char *file; +#ifdef HAVE_BUG_FUNCTION + const char *function; +#endif #else signed int file_disp; +#ifdef HAVE_BUG_FUNCTION + signed int function_disp; +#endif #endif unsigned short line; #endif @@ -96,15 +103,18 @@ extern __printf(1, 2) void __warn_printk(const char *fmt, ...); #define __WARN() __WARN_printf(TAINT_WARN, NULL) #define __WARN_printf(taint, arg...) do { \ instrumentation_begin(); \ - warn_slowpath_fmt(__FILE__, __LINE__, taint, arg); \ + if (!IS_SUPPRESSED_WARNING(__func__)) \ + warn_slowpath_fmt(__FILE__, __LINE__, taint, arg);\ instrumentation_end(); \ } while (0) #else #define __WARN() __WARN_FLAGS(BUGFLAG_TAINT(TAINT_WARN)) #define __WARN_printf(taint, arg...) do { \ instrumentation_begin(); \ - __warn_printk(arg); \ - __WARN_FLAGS(BUGFLAG_NO_CUT_HERE | BUGFLAG_TAINT(taint));\ + if (!IS_SUPPRESSED_WARNING(__func__)) { \ + __warn_printk(arg); \ + __WARN_FLAGS(BUGFLAG_NO_CUT_HERE | BUGFLAG_TAINT(taint));\ + } \ instrumentation_end(); \ } while (0) #define WARN_ON_ONCE(condition) ({ \ diff --git a/include/kunit/bug.h b/include/kunit/bug.h new file mode 100644 index 000000000000..bd0fe047572b --- /dev/null +++ b/include/kunit/bug.h @@ -0,0 +1,51 @@ +/* SPDX-License-Identifier: GPL-2.0 */ +/* + * KUnit helpers for backtrace suppression + * + * Copyright (c) 2024 Guenter Roeck + */ + +#ifndef _KUNIT_BUG_H +#define _KUNIT_BUG_H + +#ifndef __ASSEMBLY__ + +#include + +#ifdef CONFIG_KUNIT_SUPPRESS_BACKTRACE + +#include +#include + +struct __suppressed_warning { + struct list_head node; + const char *function; +}; + +void __start_suppress_warning(struct __suppressed_warning *warning); +void __end_suppress_warning(struct __suppressed_warning *warning); +bool __is_suppressed_warning(const char *function); + +#define DEFINE_SUPPRESSED_WARNING(func) \ + struct __suppressed_warning __kunit_suppress_##func = \ + { .function = __stringify(func) } + +#define START_SUPPRESSED_WARNING(func) \ + __start_suppress_warning(&__kunit_suppress_##func) + +#define END_SUPPRESSED_WARNING(func) \ + __end_suppress_warning(&__kunit_suppress_##func) + +#define IS_SUPPRESSED_WARNING(func) \ + __is_suppressed_warning(func) + +#else /* CONFIG_KUNIT_SUPPRESS_BACKTRACE */ + +#define DEFINE_SUPPRESSED_WARNING(func) +#define START_SUPPRESSED_WARNING(func) +#define END_SUPPRESSED_WARNING(func) +#define IS_SUPPRESSED_WARNING(func) (false) + +#endif /* CONFIG_KUNIT_SUPPRESS_BACKTRACE */ +#endif /* __ASSEMBLY__ */ +#endif /* _KUNIT_BUG_H */ diff --git a/include/kunit/test.h b/include/kunit/test.h index 61637ef32302..d0c44594d34c 100644 --- a/include/kunit/test.h +++ b/include/kunit/test.h @@ -10,6 +10,7 @@ #define _KUNIT_TEST_H #include +#include #include #include diff --git a/include/linux/bug.h b/include/linux/bug.h index 348acf2558f3..c668762dc76a 100644 --- a/include/linux/bug.h +++ b/include/linux/bug.h @@ -36,6 +36,9 @@ static inline int is_warning_bug(const struct bug_entry *bug) return bug->flags & BUGFLAG_WARNING; } +void bug_get_file_function_line(struct bug_entry *bug, const char **file, + const char **function, unsigned int *line); + void bug_get_file_line(struct bug_entry *bug, const char **file, unsigned int *line); @@ -62,6 +65,16 @@ static inline enum bug_trap_type report_bug(unsigned long bug_addr, } struct bug_entry; +static inline void bug_get_file_function_line(struct bug_entry *bug, + const char **file, + const char **function, + unsigned int *line) +{ + *file = NULL; + *function = NULL; + *line = 0; +} + static inline void bug_get_file_line(struct bug_entry *bug, const char **file, unsigned int *line) { diff --git a/lib/bug.c b/lib/bug.c index e0ff21989990..aa8bb12b9809 100644 --- a/lib/bug.c +++ b/lib/bug.c @@ -26,6 +26,14 @@ when CONFIG_DEBUG_BUGVERBOSE is not enabled, so you must generate the values accordingly. + 2a.Optionally implement support for the "function" entry in struct + bug_entry. This entry must point to the name of the function triggering + the warning or bug trap (normally __func__). This is only needed if + both CONFIG_DEBUG_BUGVERBOSE and CONFIG_KUNIT_SUPPRESS_BACKTRACE are + enabled and if the architecture wants to implement support for suppressing + warning backtraces. The architecture must define HAVE_BUG_FUNCTION if it + adds pointers to function names to struct bug_entry. + 3. Implement the trap - In the illegal instruction trap handler (typically), verify that the fault was in kernel mode, and call report_bug() @@ -127,14 +135,21 @@ static inline struct bug_entry *module_find_bug(unsigned long bugaddr) } #endif -void bug_get_file_line(struct bug_entry *bug, const char **file, - unsigned int *line) +void bug_get_file_function_line(struct bug_entry *bug, const char **file, + const char **function, unsigned int *line) { + *function = NULL; #ifdef CONFIG_DEBUG_BUGVERBOSE #ifdef CONFIG_GENERIC_BUG_RELATIVE_POINTERS *file = (const char *)&bug->file_disp + bug->file_disp; +#ifdef HAVE_BUG_FUNCTION + *function = (const char *)&bug->function_disp + bug->function_disp; +#endif #else *file = bug->file; +#ifdef HAVE_BUG_FUNCTION + *function = bug->function; +#endif #endif *line = bug->line; #else @@ -143,6 +158,13 @@ void bug_get_file_line(struct bug_entry *bug, const char **file, #endif } +void bug_get_file_line(struct bug_entry *bug, const char **file, unsigned int *line) +{ + const char *function; + + bug_get_file_function_line(bug, file, &function, line); +} + struct bug_entry *find_bug(unsigned long bugaddr) { struct bug_entry *bug; @@ -157,8 +179,9 @@ struct bug_entry *find_bug(unsigned long bugaddr) static enum bug_trap_type __report_bug(unsigned long bugaddr, struct pt_regs *regs) { struct bug_entry *bug; - const char *file; + const char *file, *function; unsigned line, warning, once, done; + char __maybe_unused sym[KSYM_SYMBOL_LEN]; if (!is_valid_bugaddr(bugaddr)) return BUG_TRAP_TYPE_NONE; @@ -169,12 +192,32 @@ static enum bug_trap_type __report_bug(unsigned long bugaddr, struct pt_regs *re disable_trace_on_warning(); - bug_get_file_line(bug, &file, &line); + bug_get_file_function_line(bug, &file, &function, &line); +#if defined(CONFIG_KUNIT_SUPPRESS_BACKTRACE) && defined(CONFIG_KALLSYMS) + if (!function) { + /* + * This will be seen if report_bug is called on an architecture + * with no architecture-specific support for suppressing warning + * backtraces, if CONFIG_DEBUG_BUGVERBOSE is not enabled, or if + * the calling code is from assembler which does not record a + * function name. Extracting the function name from the bug + * address is less than perfect since compiler optimization may + * result in 'bugaddr' pointing to a function which does not + * actually trigger the warning, but it is better than no + * suppression at all. + */ + sprint_symbol_no_offset(sym, bugaddr); + function = sym; + } +#endif /* defined(CONFIG_KUNIT_SUPPRESS_BACKTRACE) && defined(CONFIG_KALLSYMS) */ warning = (bug->flags & BUGFLAG_WARNING) != 0; once = (bug->flags & BUGFLAG_ONCE) != 0; done = (bug->flags & BUGFLAG_DONE) != 0; + if (warning && IS_SUPPRESSED_WARNING(function)) + return BUG_TRAP_TYPE_WARN; + if (warning && once) { if (done) return BUG_TRAP_TYPE_WARN; diff --git a/lib/kunit/Kconfig b/lib/kunit/Kconfig index 68a6daec0aef..b1b899265acc 100644 --- a/lib/kunit/Kconfig +++ b/lib/kunit/Kconfig @@ -15,6 +15,15 @@ menuconfig KUNIT if KUNIT +config KUNIT_SUPPRESS_BACKTRACE + bool "KUnit - Enable backtrace suppression" + default y + help + Enable backtrace suppression for KUnit. If enabled, backtraces + generated intentionally by KUnit tests are suppressed. Disable + to reduce kernel image size if image size is more important than + suppression of backtraces generated by KUnit tests. + config KUNIT_DEBUGFS bool "KUnit - Enable /sys/kernel/debug/kunit debugfs representation" if !KUNIT_ALL_TESTS default KUNIT_ALL_TESTS diff --git a/lib/kunit/Makefile b/lib/kunit/Makefile index 309659a32a78..545b57c3be48 100644 --- a/lib/kunit/Makefile +++ b/lib/kunit/Makefile @@ -14,8 +14,10 @@ ifeq ($(CONFIG_KUNIT_DEBUGFS),y) kunit-objs += debugfs.o endif -# KUnit 'hooks' are built-in even when KUnit is built as a module. -obj-y += hooks.o +# KUnit 'hooks' and bug handling are built-in even when KUnit is built +# as a module. +obj-y += hooks.o \ + bug.o obj-$(CONFIG_KUNIT_TEST) += kunit-test.o diff --git a/lib/kunit/bug.c b/lib/kunit/bug.c new file mode 100644 index 000000000000..f93544d7a9d1 --- /dev/null +++ b/lib/kunit/bug.c @@ -0,0 +1,40 @@ +// SPDX-License-Identifier: GPL-2.0 +/* + * KUnit helpers for backtrace suppression + * + * Copyright (c) 2024 Guenter Roeck + */ + +#include +#include +#include +#include + +static LIST_HEAD(suppressed_warnings); + +void __start_suppress_warning(struct __suppressed_warning *warning) +{ + list_add(&warning->node, &suppressed_warnings); +} +EXPORT_SYMBOL_GPL(__start_suppress_warning); + +void __end_suppress_warning(struct __suppressed_warning *warning) +{ + list_del(&warning->node); +} +EXPORT_SYMBOL_GPL(__end_suppress_warning); + +bool __is_suppressed_warning(const char *function) +{ + struct __suppressed_warning *warning; + + if (!function) + return false; + + list_for_each_entry(warning, &suppressed_warnings, node) { + if (!strcmp(function, warning->function)) + return true; + } + return false; +} +EXPORT_SYMBOL_GPL(__is_suppressed_warning); From patchwork Wed Apr 3 13:19:23 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Guenter Roeck X-Patchwork-Id: 13616084 Received: from mail-pl1-f171.google.com (mail-pl1-f171.google.com [209.85.214.171]) (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 90112147C6C; Wed, 3 Apr 2024 13:19:46 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.214.171 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1712150388; cv=none; b=RD1rfPgrcOwRWgNgD/FRhHaYDeMnSnlwOTTrK4eWIXaE09XXwUbSMFb4dX7mRhafWR0ZqpSLIwgLZRRoAW69iXQ1v3+KiYlkfWCWM7E4QFcT3hqsonYYfYGN+RZ+xvIH/tvkwvUfI9J/ynYzjnmO025is5xF1isi99aTpg87hj4= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1712150388; c=relaxed/simple; bh=qIpKll238/HMKyMj8OXA3kK3I9zyQbT0+DzHrIXJApg=; h=From:To:Cc:Subject:Date:Message-Id:In-Reply-To:References: MIME-Version; b=H3UE/+DL5x6yERGzYXJ9gvUWbXTdj/1BmKA98BsvPyyBey4u8I1huCUpefzBpdQs0ZYpQeT5mr0TILO9iw/ID9ecrpiT7XzODzhDg+21FgTEW6W7WTYJMKHPt2o2ippYfhq4m3nRbqUPJ2aKl587LTgGhi6GXV4G75hryzszg4Y= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=none (p=none dis=none) header.from=roeck-us.net; spf=pass smtp.mailfrom=gmail.com; dkim=pass (2048-bit key) header.d=gmail.com header.i=@gmail.com header.b=InvFh4N7; arc=none smtp.client-ip=209.85.214.171 Authentication-Results: smtp.subspace.kernel.org; dmarc=none (p=none dis=none) header.from=roeck-us.net 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="InvFh4N7" Received: by mail-pl1-f171.google.com with SMTP id d9443c01a7336-1e296c7aa7cso4303095ad.1; Wed, 03 Apr 2024 06:19:46 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20230601; t=1712150385; x=1712755185; darn=vger.kernel.org; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:sender:from:to:cc:subject:date :message-id:reply-to; bh=vPi3jXYhV/VW7gVgCzBi2KBL1/Xcj6OVJJpN8P4Laxs=; b=InvFh4N7Hb1IP9fVLAn2M2FO6/oG4l7vTjWn1rnmBl71Ep6ntedclhWog6OgqsYZA6 CROmiegIbIREQAxXQb3xhh4/hkvq3OrptAbkn8SFxnjxQmp2gDRaj7dWjCxfJQUCUvPU RlOocwLjXHCqBpQLaW0/BJLuvTOLO5pE0teSzwK4OpqS6b8R8I448GvGvncyJnkFUQ+Y gHePaXzdp/WFJGV6WVZZhKqnAeqqaIQTgYctdSYvqsi+rnJxG7louyzJcxJZXnRfPIrn AHzwHkX1tiGo7BUDjbhepv+jiCOU8o7ALusoVBRKfRy7FpbUV8BKYmUXl9afA6+ol48m 6D2w== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1712150385; x=1712755185; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:sender:x-gm-message-state:from :to:cc:subject:date:message-id:reply-to; bh=vPi3jXYhV/VW7gVgCzBi2KBL1/Xcj6OVJJpN8P4Laxs=; b=ZydZy6urPjyueBDjpIhV7V6bkvAPSh8jeA7Ubp3TbVdCWC1lD4P+Am+ejvyQiY49O5 0OYny4O//KjUM3pZK1kDbKXI+wBwnaZJc+zbspSIHFgA0ADnVUbay5VIA6A6iFzvjDdb aN1bRxZvvjtybYDDcinAv7rNG/QAynEJP8aruCpX810HM9S8erbo8k0l9xcPKeAq+rUV xl6w5fhS7Z3CFSGHCWZbplIu/k5XgM+xjkH3QbUpp3PbNF+rVtS3gwPxNFtZYeH2Emr7 DUIWnO/A3MOayp1htQa0EcZBJes2DQLRg8hERTKYMeHcAym9/CgQ5ieXe4tVVuiGONY1 G7ow== X-Forwarded-Encrypted: i=1; AJvYcCWlwjS9mvJ5yhRr4ph9ZOyIj4mcmrqOtsGzCQQ55pj8jGAOzgYU6y77a1tikxyA3uaNQn3ezYyE1HQM1qxFmaTN9nwj6BffUNAiUXI7mQu0lmwE6IbFb1wrWZy6rm80Ed9sc337c9ll4xhNadID4oZXNraeGHakjlNVdvh4sI26QOdHpJMtAH/v+EpsYZqcq3ae9CPCzulY0SAYJYftV9btuWLRD3Jiw9pag7s0rlguoSTX24xRZinCxRpr7HWdBAymJ4MiyveJ2NmzyNQf+vaLNxZQEwvHVtFMwyeJu9Bwx9VqMobSOlw5Ckjdzf6h/Q== X-Gm-Message-State: AOJu0Yw0sIzM5kbnjN9CB63lqA8l/UsoSnYrHTKkC2H0zgx+GiICF59+ uocPzyUSnV+BWMLfdRCFl/74u9XT2FlkHY1USi4Kz0LRNtLO/060R7lDEieE X-Google-Smtp-Source: AGHT+IEBdntNuCJK1g1Qd+nUbBCHvT+g3ANfVkijVSktnMtYlUtgHLeuVpmPgg+o1C+TJMJB0A4+8w== X-Received: by 2002:a17:902:9004:b0:1e2:5e2f:682 with SMTP id a4-20020a170902900400b001e25e2f0682mr6996194plp.2.1712150385380; Wed, 03 Apr 2024 06:19:45 -0700 (PDT) Received: from server.roeck-us.net ([2600:1700:e321:62f0:329c:23ff:fee3:9d7c]) by smtp.gmail.com with ESMTPSA id u2-20020a170902e5c200b001d8f81ecea1sm13305095plf.172.2024.04.03.06.19.44 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Wed, 03 Apr 2024 06:19:44 -0700 (PDT) Sender: Guenter Roeck From: Guenter Roeck To: linux-kselftest@vger.kernel.org Cc: David Airlie , Arnd Bergmann , =?utf-8?q?Ma=C3=ADra_Canal?= , Dan Carpenter , Kees Cook , Daniel Diaz , David Gow , Arthur Grillo , Brendan Higgins , Naresh Kamboju , Maarten Lankhorst , Andrew Morton , Maxime Ripard , =?utf-8?b?VmlsbGUgU3lyasOkbMOk?= , Daniel Vetter , Thomas Zimmermann , dri-devel@lists.freedesktop.org, kunit-dev@googlegroups.com, linux-arch@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-doc@vger.kernel.org, linux-kernel@vger.kernel.org, linux-parisc@vger.kernel.org, linuxppc-dev@lists.ozlabs.org, linux-riscv@lists.infradead.org, linux-s390@vger.kernel.org, linux-sh@vger.kernel.org, loongarch@lists.linux.dev, netdev@vger.kernel.org, x86@kernel.org, Guenter Roeck , Linux Kernel Functional Testing Subject: [PATCH v3 02/15] kunit: bug: Count suppressed warning backtraces Date: Wed, 3 Apr 2024 06:19:23 -0700 Message-Id: <20240403131936.787234-3-linux@roeck-us.net> X-Mailer: git-send-email 2.39.2 In-Reply-To: <20240403131936.787234-1-linux@roeck-us.net> References: <20240403131936.787234-1-linux@roeck-us.net> Precedence: bulk X-Mailing-List: linux-parisc@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Count suppressed warning backtraces to enable code which suppresses warning backtraces to check if the expected backtrace(s) have been observed. Using atomics for the backtrace count resulted in build errors on some architectures due to include file recursion, so use a plain integer for now. Acked-by: Dan Carpenter Reviewed-by: Kees Cook Tested-by: Linux Kernel Functional Testing Signed-off-by: Guenter Roeck Reviewed-by: David Gow --- v2: - Rebased to v6.9-rc1 - Added Tested-by:, Acked-by:, and Reviewed-by: tags - Introduced KUNIT_SUPPRESS_BACKTRACE configuration option v3: - Rebased to v6.9-rc2 include/kunit/bug.h | 7 ++++++- lib/kunit/bug.c | 4 +++- 2 files changed, 9 insertions(+), 2 deletions(-) diff --git a/include/kunit/bug.h b/include/kunit/bug.h index bd0fe047572b..72e9fb23bbd5 100644 --- a/include/kunit/bug.h +++ b/include/kunit/bug.h @@ -20,6 +20,7 @@ struct __suppressed_warning { struct list_head node; const char *function; + int counter; }; void __start_suppress_warning(struct __suppressed_warning *warning); @@ -28,7 +29,7 @@ bool __is_suppressed_warning(const char *function); #define DEFINE_SUPPRESSED_WARNING(func) \ struct __suppressed_warning __kunit_suppress_##func = \ - { .function = __stringify(func) } + { .function = __stringify(func), .counter = 0 } #define START_SUPPRESSED_WARNING(func) \ __start_suppress_warning(&__kunit_suppress_##func) @@ -39,12 +40,16 @@ bool __is_suppressed_warning(const char *function); #define IS_SUPPRESSED_WARNING(func) \ __is_suppressed_warning(func) +#define SUPPRESSED_WARNING_COUNT(func) \ + (__kunit_suppress_##func.counter) + #else /* CONFIG_KUNIT_SUPPRESS_BACKTRACE */ #define DEFINE_SUPPRESSED_WARNING(func) #define START_SUPPRESSED_WARNING(func) #define END_SUPPRESSED_WARNING(func) #define IS_SUPPRESSED_WARNING(func) (false) +#define SUPPRESSED_WARNING_COUNT(func) (0) #endif /* CONFIG_KUNIT_SUPPRESS_BACKTRACE */ #endif /* __ASSEMBLY__ */ diff --git a/lib/kunit/bug.c b/lib/kunit/bug.c index f93544d7a9d1..13b3d896c114 100644 --- a/lib/kunit/bug.c +++ b/lib/kunit/bug.c @@ -32,8 +32,10 @@ bool __is_suppressed_warning(const char *function) return false; list_for_each_entry(warning, &suppressed_warnings, node) { - if (!strcmp(function, warning->function)) + if (!strcmp(function, warning->function)) { + warning->counter++; return true; + } } return false; } From patchwork Wed Apr 3 13:19:24 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Guenter Roeck X-Patchwork-Id: 13616085 Received: from mail-pj1-f44.google.com (mail-pj1-f44.google.com [209.85.216.44]) (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 442D3148FEC; Wed, 3 Apr 2024 13:19:49 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.216.44 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1712150390; cv=none; b=uAPJRP7QBa13cqzU9ZmapE9o9lRQ5ROQta8d0pu1LL/rsZ+HaNNEHaURLBMe8/Kz0tKX4vLbg+w/lsQ6iB1BBSdx3uqJkrU1cTa1y9wOLK1lHuAGz4zMKQzWM6udwtGaWxRQYhNpnFdV/WSBSUBYd5CUyLokdrAzeVdPqAzfdfw= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1712150390; c=relaxed/simple; bh=+MSzk1/Cv1dDL7iePAv3xCaPMeFQUdRL5C1E7/gwMFI=; h=From:To:Cc:Subject:Date:Message-Id:In-Reply-To:References: MIME-Version; b=EsscygbeI7+13BsG9yEM4eOHEaVyTQ9gXAODME4ccrXfk8UwUrE4l0CSc7OVKSYt/l7ZvsBKFFGOucQ5Avv+/xP4Qi5SDlFtzMOkjOwtYcNfe/4SIvcJzLx79XTHSR3xOpDZjxZlHawYG148ywEE14zzs+tqrg/RVRlHfeNA1bA= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=none (p=none dis=none) header.from=roeck-us.net; spf=pass smtp.mailfrom=gmail.com; dkim=pass (2048-bit key) header.d=gmail.com header.i=@gmail.com header.b=X0m9Nv+a; arc=none smtp.client-ip=209.85.216.44 Authentication-Results: smtp.subspace.kernel.org; dmarc=none (p=none dis=none) header.from=roeck-us.net 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="X0m9Nv+a" Received: by mail-pj1-f44.google.com with SMTP id 98e67ed59e1d1-2a2474f2595so2124713a91.1; Wed, 03 Apr 2024 06:19:49 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20230601; t=1712150388; x=1712755188; darn=vger.kernel.org; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:sender:from:to:cc:subject:date :message-id:reply-to; bh=Pjv7Xp9MV0DSDQU0m3fWBF7u8xCRPonxB88RSacFUiY=; b=X0m9Nv+aOPGK4kWO4bMEKNKWH1LCEUp6JVF0739YoXHmB/NJDQd1+NV6f7RyW4phRL lx8g+S1zr+MJMBrWGxC6XU/FHZfHo7h2OC12XtSh1dp9tAswDXTud78Ok7rnVN9d8pLV +ZCSvjl6OO58F1Vk74pf7yyD7lR1Uk/Yrhm9SFo3OcB31msp8pjHC7I7Ft9Enp5mM3yO /v3HN2FI8DV4fpCb+m7JENoNb/3i69rV62/AoDt1VmPYQg6ZckkiwUMeN3nsEqvIc5Nl Wzbgf87tbr+jreIy4CfOku9NqGZAEa+9W+eECejM0K/N1zkyEeTu5Wxe1wwSZUMz2Ogm ziIg== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1712150388; x=1712755188; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:sender:x-gm-message-state:from :to:cc:subject:date:message-id:reply-to; bh=Pjv7Xp9MV0DSDQU0m3fWBF7u8xCRPonxB88RSacFUiY=; b=J3BNIQO08Hl1KUsuUfDWq8TQhkEijbU6Or7Mmx0xY7RSzI66pIb2TXH5Z8+KW2izti RkqutjXHInxSU8+bq97GOZR3pbbLu//DKBn7nBpZcSYio0no3LFL8el65Xj+pX6iT0ig ke/bgArFYiwuq40VgzB+m0NdhBc9qmCb7W278enXgUPsy9bD3l1gyL359cBdaKFQ5Tu+ lBDIAX9nuJI6zNw/ym00vPV/iEwgHSw5qRZbveV3qut6GjOkLOznCL8S6JaaF1dOwOxF OobYWmW8ckltFumXQfk0tK3aVEnaX53w5o3U2Rkqm9mh65u41Zv+Ric4Y23zvf+Uj48z w8Vg== X-Forwarded-Encrypted: i=1; AJvYcCWqSxy3bZnzGwW2HchvvmpyttkrmgPWOm3mzZvhOJBtEq54dgAcCzfIwBk0wtXKXnIpFOh6qDEoGbG1dxXLA0qX1g+zcJcjXTFhijd6yvLZ5Cwsi/f9FeZbSNEF5ciW8R+3HJ7KwYgs5LplEMYma5wUUQRQO6J2I/QdRotc8TYV+VCp/GsnmyOgYK2CJVaaNmqdgmQphBFk66J8lWng4WJ0SGPKW+68VUTqn6he9X1Sdu8GPrklUtUi78/9x62hrGYxngVhB3EbcKTWYISTKNMxxSw+ImvMTdgMLKsVJZsSkAr/jIeeinZjGy9guzQ3aA== X-Gm-Message-State: AOJu0Yy6X+1DBCUMPtP/FnTu2uiBlY8msLIvB/fOJX88tbbadJwZ1Kj6 jdHZ6/C5UQeMqB/RPT6R+RupptoxjoL+dyHmqtmm3zmF6e4lVFp1r9GdjqXd X-Google-Smtp-Source: AGHT+IH9i3q5NLbj3L3SRhLxC/yUkLElgfzecWcrFNyAnqHWTVhzS/ed731TWMk8XQGzPC81E+r2yQ== X-Received: by 2002:a17:90a:fd8b:b0:2a2:b2bd:e1b1 with SMTP id cx11-20020a17090afd8b00b002a2b2bde1b1mr551165pjb.22.1712150388063; Wed, 03 Apr 2024 06:19:48 -0700 (PDT) Received: from server.roeck-us.net ([2600:1700:e321:62f0:329c:23ff:fee3:9d7c]) by smtp.gmail.com with ESMTPSA id on4-20020a17090b1d0400b002a0777a2b1asm11473160pjb.10.2024.04.03.06.19.46 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Wed, 03 Apr 2024 06:19:46 -0700 (PDT) Sender: Guenter Roeck From: Guenter Roeck To: linux-kselftest@vger.kernel.org Cc: David Airlie , Arnd Bergmann , =?utf-8?q?Ma=C3=ADra_Canal?= , Dan Carpenter , Kees Cook , Daniel Diaz , David Gow , Arthur Grillo , Brendan Higgins , Naresh Kamboju , Maarten Lankhorst , Andrew Morton , Maxime Ripard , =?utf-8?b?VmlsbGUgU3lyasOkbMOk?= , Daniel Vetter , Thomas Zimmermann , dri-devel@lists.freedesktop.org, kunit-dev@googlegroups.com, linux-arch@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-doc@vger.kernel.org, linux-kernel@vger.kernel.org, linux-parisc@vger.kernel.org, linuxppc-dev@lists.ozlabs.org, linux-riscv@lists.infradead.org, linux-s390@vger.kernel.org, linux-sh@vger.kernel.org, loongarch@lists.linux.dev, netdev@vger.kernel.org, x86@kernel.org, Guenter Roeck , Linux Kernel Functional Testing Subject: [PATCH v3 03/15] kunit: Add test cases for backtrace warning suppression Date: Wed, 3 Apr 2024 06:19:24 -0700 Message-Id: <20240403131936.787234-4-linux@roeck-us.net> X-Mailer: git-send-email 2.39.2 In-Reply-To: <20240403131936.787234-1-linux@roeck-us.net> References: <20240403131936.787234-1-linux@roeck-us.net> Precedence: bulk X-Mailing-List: linux-parisc@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Add unit tests to verify that warning backtrace suppression works. If backtrace suppression does _not_ work, the unit tests will likely trigger unsuppressed backtraces, which should actually help to get the affected architectures / platforms fixed. Tested-by: Linux Kernel Functional Testing Acked-by: Dan Carpenter Reviewed-by: Kees Cook Signed-off-by: Guenter Roeck --- v2: - Rebased to v6.9-rc1 - Added Tested-by:, Acked-by:, and Reviewed-by: tags - Introduced KUNIT_SUPPRESS_BACKTRACE configuration option v3: - Rebased to v6.9-rc2 lib/kunit/Makefile | 7 +- lib/kunit/backtrace-suppression-test.c | 104 +++++++++++++++++++++++++ 2 files changed, 109 insertions(+), 2 deletions(-) create mode 100644 lib/kunit/backtrace-suppression-test.c diff --git a/lib/kunit/Makefile b/lib/kunit/Makefile index 545b57c3be48..3eee1bd0ce5e 100644 --- a/lib/kunit/Makefile +++ b/lib/kunit/Makefile @@ -16,10 +16,13 @@ endif # KUnit 'hooks' and bug handling are built-in even when KUnit is built # as a module. -obj-y += hooks.o \ - bug.o +obj-y += hooks.o +obj-$(CONFIG_KUNIT_SUPPRESS_BACKTRACE) += bug.o obj-$(CONFIG_KUNIT_TEST) += kunit-test.o +ifeq ($(CCONFIG_KUNIT_SUPPRESS_BACKTRACE),y) +obj-$(CONFIG_KUNIT_TEST) += backtrace-suppression-test.o +endif # string-stream-test compiles built-in only. ifeq ($(CONFIG_KUNIT_TEST),y) diff --git a/lib/kunit/backtrace-suppression-test.c b/lib/kunit/backtrace-suppression-test.c new file mode 100644 index 000000000000..47c619283802 --- /dev/null +++ b/lib/kunit/backtrace-suppression-test.c @@ -0,0 +1,104 @@ +// SPDX-License-Identifier: GPL-2.0 +/* + * KUnit test for suppressing warning tracebacks + * + * Copyright (C) 2024, Guenter Roeck + * Author: Guenter Roeck + */ + +#include +#include + +static void backtrace_suppression_test_warn_direct(struct kunit *test) +{ + DEFINE_SUPPRESSED_WARNING(backtrace_suppression_test_warn_direct); + + START_SUPPRESSED_WARNING(backtrace_suppression_test_warn_direct); + WARN(1, "This backtrace should be suppressed"); + END_SUPPRESSED_WARNING(backtrace_suppression_test_warn_direct); + + KUNIT_EXPECT_EQ(test, SUPPRESSED_WARNING_COUNT(backtrace_suppression_test_warn_direct), 1); +} + +static void trigger_backtrace_warn(void) +{ + WARN(1, "This backtrace should be suppressed"); +} + +static void backtrace_suppression_test_warn_indirect(struct kunit *test) +{ + DEFINE_SUPPRESSED_WARNING(trigger_backtrace_warn); + + START_SUPPRESSED_WARNING(trigger_backtrace_warn); + trigger_backtrace_warn(); + END_SUPPRESSED_WARNING(trigger_backtrace_warn); + + KUNIT_EXPECT_EQ(test, SUPPRESSED_WARNING_COUNT(trigger_backtrace_warn), 1); +} + +static void backtrace_suppression_test_warn_multi(struct kunit *test) +{ + DEFINE_SUPPRESSED_WARNING(trigger_backtrace_warn); + DEFINE_SUPPRESSED_WARNING(backtrace_suppression_test_warn_multi); + + START_SUPPRESSED_WARNING(backtrace_suppression_test_warn_multi); + START_SUPPRESSED_WARNING(trigger_backtrace_warn); + WARN(1, "This backtrace should be suppressed"); + trigger_backtrace_warn(); + END_SUPPRESSED_WARNING(trigger_backtrace_warn); + END_SUPPRESSED_WARNING(backtrace_suppression_test_warn_multi); + + KUNIT_EXPECT_EQ(test, SUPPRESSED_WARNING_COUNT(backtrace_suppression_test_warn_multi), 1); + KUNIT_EXPECT_EQ(test, SUPPRESSED_WARNING_COUNT(trigger_backtrace_warn), 1); +} + +static void backtrace_suppression_test_warn_on_direct(struct kunit *test) +{ + DEFINE_SUPPRESSED_WARNING(backtrace_suppression_test_warn_on_direct); + + if (!IS_ENABLED(CONFIG_DEBUG_BUGVERBOSE) && !IS_ENABLED(CONFIG_KALLSYMS)) + kunit_skip(test, "requires CONFIG_DEBUG_BUGVERBOSE or CONFIG_KALLSYMS"); + + START_SUPPRESSED_WARNING(backtrace_suppression_test_warn_on_direct); + WARN_ON(1); + END_SUPPRESSED_WARNING(backtrace_suppression_test_warn_on_direct); + + KUNIT_EXPECT_EQ(test, + SUPPRESSED_WARNING_COUNT(backtrace_suppression_test_warn_on_direct), 1); +} + +static void trigger_backtrace_warn_on(void) +{ + WARN_ON(1); +} + +static void backtrace_suppression_test_warn_on_indirect(struct kunit *test) +{ + DEFINE_SUPPRESSED_WARNING(trigger_backtrace_warn_on); + + if (!IS_ENABLED(CONFIG_DEBUG_BUGVERBOSE)) + kunit_skip(test, "requires CONFIG_DEBUG_BUGVERBOSE"); + + START_SUPPRESSED_WARNING(trigger_backtrace_warn_on); + trigger_backtrace_warn_on(); + END_SUPPRESSED_WARNING(trigger_backtrace_warn_on); + + KUNIT_EXPECT_EQ(test, SUPPRESSED_WARNING_COUNT(trigger_backtrace_warn_on), 1); +} + +static struct kunit_case backtrace_suppression_test_cases[] = { + KUNIT_CASE(backtrace_suppression_test_warn_direct), + KUNIT_CASE(backtrace_suppression_test_warn_indirect), + KUNIT_CASE(backtrace_suppression_test_warn_multi), + KUNIT_CASE(backtrace_suppression_test_warn_on_direct), + KUNIT_CASE(backtrace_suppression_test_warn_on_indirect), + {} +}; + +static struct kunit_suite backtrace_suppression_test_suite = { + .name = "backtrace-suppression-test", + .test_cases = backtrace_suppression_test_cases, +}; +kunit_test_suites(&backtrace_suppression_test_suite); + +MODULE_LICENSE("GPL"); From patchwork Wed Apr 3 13:19:25 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Guenter Roeck X-Patchwork-Id: 13616086 Received: from mail-pl1-f170.google.com (mail-pl1-f170.google.com [209.85.214.170]) (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 4F2751494B0; Wed, 3 Apr 2024 13:19:51 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.214.170 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1712150392; cv=none; b=YpP0D+jxfZP27px/7aRdMnzEMtrxesKTAJh9ydarxfUzRfIEiC21SkB7ilB4TsCUEX0gUQeBxQwfZqp/lh0UMYTV/vRyv7VRUj+7wmY7xvL84rRzlDLAOgq9BKrkxp0V+Jw4PN4xE39g0pp+hRyaGB/J8TTC/WIChK9qrnxAWok= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1712150392; c=relaxed/simple; bh=gwAOp4S2RjVEdHOKrWJyWwN/DfRkuBxfLFLX2qhlwAk=; h=From:To:Cc:Subject:Date:Message-Id:In-Reply-To:References: MIME-Version; b=d+6oQG8n2g8lkNTxz5d/ICc385zgW537wmUnPcKvH9eeclayd+hqGhEefSdHHUt9d+9z8X5SJYSnZQ46ucQg4gKX3B7J4b5Q1OajnyH3PYfJrrLVnP20KuNq5vqbQR7T3YgQiJIioXzrRG0dwN68DkNXMn5hj14Z0cMvP9K3N8M= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=none (p=none dis=none) header.from=roeck-us.net; spf=pass smtp.mailfrom=gmail.com; dkim=pass (2048-bit key) header.d=gmail.com header.i=@gmail.com header.b=NrlSB0dq; arc=none smtp.client-ip=209.85.214.170 Authentication-Results: smtp.subspace.kernel.org; dmarc=none (p=none dis=none) header.from=roeck-us.net 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="NrlSB0dq" Received: by mail-pl1-f170.google.com with SMTP id d9443c01a7336-1def3340682so55044525ad.1; Wed, 03 Apr 2024 06:19:51 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20230601; t=1712150390; x=1712755190; darn=vger.kernel.org; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:sender:from:to:cc:subject:date :message-id:reply-to; bh=KUpuwFkhA/ZZkaJrm+5DUMvKoRunaI4/ZlB0ejZmZW4=; b=NrlSB0dqzPGsGvaBnVtkkGzsPLlrHVxaI+Rq3xe6I19wF9TEovnFLLHjvXC61HbJFB sdlK0wK2zRKcS/CN4sjcfuSTXOBsPWqgAnOJs3Snur9RAkwEHizDTbxAw+JprxU7iQzq yVF/HeGNjbWQeKgQERK/20fQtN+ReHfG+i2zZxck8xlkHwSzak80A+1cosz38bYEJI1s p2Q4vyBRvMS8Sic/oHWB8eI5CzwbGBK17ftLTE3WWJ+PtRY+CUvsoB1dWoV1I4KF/b8v UE0E0Fqd2K3uzMFjRoKYryb7EVBG4zgXFJ/oHX2aim65MmskTwlAtS6uiZpzfeLAITyX g2xA== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1712150390; x=1712755190; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:sender:x-gm-message-state:from :to:cc:subject:date:message-id:reply-to; bh=KUpuwFkhA/ZZkaJrm+5DUMvKoRunaI4/ZlB0ejZmZW4=; b=btzO3UJhvivPKmI/H9F6bXeUCoLf8SN/1/NoAITJkmyaVlWswoVT257KmJxcU5qYVC bMAiGwYhIGq51C6Z9ZxXzoEYqmfiCncv9hxgarvYl3yptFRacMaezCGIxALP5HLVknw6 LAUGiWF2MP88a76oCj9M9FyCi9SuhfxQXqGThWfnJpA5meiY7zIqE7PX0HJiBErIcKNI KI8ScHnSUHlIwFUvbljKqw/c/UPnKFOPBCiTDcL3wHQh8hm/ltjt1WPONHZ/QdyPCzyL COqbApfu7imDbMF/mV1uObeEn/7VTCZUsBuL0uba8McN0NLfRD1iMKXbwOOqfSuYHdWU kU0g== X-Forwarded-Encrypted: i=1; AJvYcCU6BT4lqaj0MY5L+7RBsUjmSFl+KGwQlh3BbNwCabmBmR/Ae9aMp7AT2hUcRJ273dlbdvkmUcNGFR9T3TOowYePU69m6Jzx91B6RN+NJCb7O9vIVWyPRU7AJtrPXGdwBzcpcHCf+CtlbH4zThjG2Fm4JPFa9XkgdUABzQk3hAwC95q8SIeDYwprIyQKFuNiqsMFzh4K56zinSt8qIeLYgxUnu4vq346Y0z3DoCmF8DFHY5qKFQqv9x3SqJcD9//xmjXqsiXjWK1ARO/dPGk/2ZpzZtS9lW36zDjan9XokvEyQA7J6qvlvnOW0V37ZBkpg== X-Gm-Message-State: AOJu0Yw7OgMLn5ewP84wGc57w+UK6yUHpCJRsFoFHCh80FS+7XVvo3Vv ZSGH3yTlO/0yUnLApHBgknoEg7xsiQcU/n6ARIGfj5uVqQxGE5Ihytib2DX8 X-Google-Smtp-Source: AGHT+IE/2OacMp/2cfvaRksBgAjGZgKxyI++pmI4VDvZRW0+d8012wJeFPX8kGKifNbdvVT4SH77dg== X-Received: by 2002:a17:902:f68a:b0:1e2:9205:5254 with SMTP id l10-20020a170902f68a00b001e292055254mr1881147plg.7.1712150389795; Wed, 03 Apr 2024 06:19:49 -0700 (PDT) Received: from server.roeck-us.net ([2600:1700:e321:62f0:329c:23ff:fee3:9d7c]) by smtp.gmail.com with ESMTPSA id k10-20020a170902694a00b001e088a9e2bcsm13158796plt.292.2024.04.03.06.19.48 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Wed, 03 Apr 2024 06:19:49 -0700 (PDT) Sender: Guenter Roeck From: Guenter Roeck To: linux-kselftest@vger.kernel.org Cc: David Airlie , Arnd Bergmann , =?utf-8?q?Ma=C3=ADra_Canal?= , Dan Carpenter , Kees Cook , Daniel Diaz , David Gow , Arthur Grillo , Brendan Higgins , Naresh Kamboju , Maarten Lankhorst , Andrew Morton , Maxime Ripard , =?utf-8?b?VmlsbGUgU3lyasOkbMOk?= , Daniel Vetter , Thomas Zimmermann , dri-devel@lists.freedesktop.org, kunit-dev@googlegroups.com, linux-arch@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-doc@vger.kernel.org, linux-kernel@vger.kernel.org, linux-parisc@vger.kernel.org, linuxppc-dev@lists.ozlabs.org, linux-riscv@lists.infradead.org, linux-s390@vger.kernel.org, linux-sh@vger.kernel.org, loongarch@lists.linux.dev, netdev@vger.kernel.org, x86@kernel.org, Guenter Roeck , Linux Kernel Functional Testing Subject: [PATCH v3 04/15] kunit: Add documentation for warning backtrace suppression API Date: Wed, 3 Apr 2024 06:19:25 -0700 Message-Id: <20240403131936.787234-5-linux@roeck-us.net> X-Mailer: git-send-email 2.39.2 In-Reply-To: <20240403131936.787234-1-linux@roeck-us.net> References: <20240403131936.787234-1-linux@roeck-us.net> Precedence: bulk X-Mailing-List: linux-parisc@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Document API functions for suppressing warning backtraces. Tested-by: Linux Kernel Functional Testing Acked-by: Dan Carpenter Reviewed-by: Kees Cook Signed-off-by: Guenter Roeck Reviewed-by: David Gow --- v2: - Rebased to v6.9-rc1 - Added Tested-by:, Acked-by:, and Reviewed-by: tags v3: - Rebased to v6.9-rc2 Documentation/dev-tools/kunit/usage.rst | 30 ++++++++++++++++++++++++- 1 file changed, 29 insertions(+), 1 deletion(-) diff --git a/Documentation/dev-tools/kunit/usage.rst b/Documentation/dev-tools/kunit/usage.rst index 22955d56b379..8d3d36d4103d 100644 --- a/Documentation/dev-tools/kunit/usage.rst +++ b/Documentation/dev-tools/kunit/usage.rst @@ -157,6 +157,34 @@ Alternatively, one can take full control over the error message by using if (some_setup_function()) KUNIT_FAIL(test, "Failed to setup thing for testing"); +Suppressing warning backtraces +------------------------------ + +Some unit tests trigger warning backtraces either intentionally or as side +effect. Such backtraces are normally undesirable since they distract from +the actual test and may result in the impression that there is a problem. + +Such backtraces can be suppressed. To suppress a backtrace in some_function(), +use the following code. + +.. code-block:: c + + static void some_test(struct kunit *test) + { + DEFINE_SUPPRESSED_WARNING(some_function); + + START_SUPPRESSED_WARNING(some_function); + trigger_backtrace(); + END_SUPPRESSED_WARNING(some_function); + } + +SUPPRESSED_WARNING_COUNT() returns the number of suppressed backtraces. If the +suppressed backtrace was triggered on purpose, this can be used to check if +the backtrace was actually triggered. + +.. code-block:: c + + KUNIT_EXPECT_EQ(test, SUPPRESSED_WARNING_COUNT(some_function), 1); Test Suites ~~~~~~~~~~~ @@ -857,4 +885,4 @@ For example: dev_managed_string = devm_kstrdup(fake_device, "Hello, World!"); // Everything is cleaned up automatically when the test ends. - } \ No newline at end of file + } From patchwork Wed Apr 3 13:19:26 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Patchwork-Submitter: Guenter Roeck X-Patchwork-Id: 13616087 Received: from mail-pl1-f182.google.com (mail-pl1-f182.google.com [209.85.214.182]) (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 CE0BA1494D8; Wed, 3 Apr 2024 13:19:52 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.214.182 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1712150394; cv=none; b=gjpRws1PIMmjRBbB2SmaXd3mGSO1kyAkQQsABkR0BhdWyb/TLBwRcEEIesDZ5NMO5916pXX8VW222nG1r0aaiEX0I/KEonKwn6OjD55+nVarxdrTsmoNQOU49aUeZvw20m+24edEypbdhQnmcM9RCvYQaPJOlj1KbxNv58liUjo= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1712150394; c=relaxed/simple; bh=kq5+RMCvHSKQHxJsCA0Sj8YeDyJpY+oX/LlT/96C6xo=; h=From:To:Cc:Subject:Date:Message-Id:In-Reply-To:References: MIME-Version:Content-Type; b=hKSvL1qAIBwv6Wv8ugflknNTlRIp1G02rtTX0qt0kjyEfx3EmhO+oJ++DwE1qHSnIWJY4MBw7YV5i4To9mXCof3f+VbqcXruViknCgZUg6RQ5NsBRxVRTbCNBL5pVrl9/2vgftEpAfEQQE15WQ1GhKjEmEjYYZjQ49XVFaACBU0= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=none (p=none dis=none) header.from=roeck-us.net; spf=pass smtp.mailfrom=gmail.com; dkim=pass (2048-bit key) header.d=gmail.com header.i=@gmail.com header.b=KmnCkyTD; arc=none smtp.client-ip=209.85.214.182 Authentication-Results: smtp.subspace.kernel.org; dmarc=none (p=none dis=none) header.from=roeck-us.net 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="KmnCkyTD" Received: by mail-pl1-f182.google.com with SMTP id d9443c01a7336-1e29328289eso4704835ad.0; Wed, 03 Apr 2024 06:19:52 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20230601; t=1712150391; x=1712755191; darn=vger.kernel.org; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:sender:from:to:cc:subject:date :message-id:reply-to; bh=0HH3He2M5JGBbpn1IyUzwQbFpqNeS8i3zDjnB0NO5L0=; b=KmnCkyTDVQ8LTmmPVRaWQmewlpAXMAbluotff3psu5SqqHRsDUqb1WDVVJhpfSwt6D qeNPXiD3fjotHJFAO2xIhTDu3Bx3oe+wdBvY6IbvBKIfElt7gOwqeDRlVhylYKIDdexT nSGvn6TGNo+YfQWpGrczNNcHUoaMNcGmqwjmVtxlfDpEVN/U/GbUQVRVZ2oLO4GyrZxa gNHkqqOOx2wAUuBKryz2EH0NU0pXsiOqNgNzwCDp62Y9lC+vGqC839aRicD3013tLjGL ZI0f6v61/JJWK7dxndRRMrHKcsqQ2ardbcbV/KezywD5dF9Nmrpzucf2rxV3ZNl4GM+b otHQ== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1712150391; x=1712755191; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:sender:x-gm-message-state:from :to:cc:subject:date:message-id:reply-to; bh=0HH3He2M5JGBbpn1IyUzwQbFpqNeS8i3zDjnB0NO5L0=; b=QnGx9lj/SIqw7CmbpP1dVYK9Ebggu0GiaZNHXTPsXcRieo3oAnu9WPP7rCQBNt+Zy/ fWDgkEW+SJZs/u2kN5AK4Yl89SKuKF9pdDCrVHIGH1DXCCzLVcNbkyMDtKRZCq3VmkOt SmSELE3MOx3LeQ0KRDyMys4Ozg/z924TAFUyUdbbkz0k2H3PrDb5xsvEIJbSKDS9ZuS3 QaKnbEEkHvYUGWxcoBciMiOvdATMhxMXIksdNqwp37/eMCzwHEA0yphkwnmYsfZc40N+ 6epW8dwxlgSymkzVE5uEujjKSMrGXkQP9VqgxBBFOTRaeH4QLGDyjBOa743AofmH7hsq 24/Q== X-Forwarded-Encrypted: i=1; AJvYcCX4su6MLSBZl/joLOGT38EAsbC2D20Q2SCQF0A+b/tHZ9HOa6GuoJGTAZBaEqtE4X9ORB63Zo2BYhD+kl7e0vDR2CD5J0oXNna8ixWP9Vcl1jueZWrZhTqSIUm7YYsRF2bd5Qzf778CwXbd8pJ5OmK5wmqbTynRq84c7cxKB5Cn2bOfGsEFERW9oom1olZXTPQh1RhMqKY7GTBy6jwoaf/f5vbAX9rMkmOTT9s0SmR5PCKj3eVtI0B07KhrDP5QjrkMEvmuV9MobGmG0sl/ri94HiryfoexwHf2tWXixPOZzCiy/sHiCuJEikJEH5gr5A== X-Gm-Message-State: AOJu0YzYBFwfxuYK8gIJD2Ug3iQAUSCHSU5PDtYLhtXz5ojGn6dOZ9BX lXHb/jKVaXX93AdLPFLNNKD3vaLulPbYuGicqnpx/Up220tv3XwuY6myKsNu X-Google-Smtp-Source: AGHT+IGzp4oN8GRSo/9EyN0xy1NOVYsP3l70Car4fBvR2s7g6gbB9/O+yleAACI5/eSTY78txokLLg== X-Received: by 2002:a17:903:d1:b0:1e2:a177:d6b with SMTP id x17-20020a17090300d100b001e2a1770d6bmr229571plc.19.1712150391428; Wed, 03 Apr 2024 06:19:51 -0700 (PDT) Received: from server.roeck-us.net ([2600:1700:e321:62f0:329c:23ff:fee3:9d7c]) by smtp.gmail.com with ESMTPSA id h1-20020a170902b94100b001dd0c5d5227sm13149194pls.193.2024.04.03.06.19.50 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Wed, 03 Apr 2024 06:19:50 -0700 (PDT) Sender: Guenter Roeck From: Guenter Roeck To: linux-kselftest@vger.kernel.org Cc: David Airlie , Arnd Bergmann , =?utf-8?q?Ma=C3=ADra_Canal?= , Dan Carpenter , Kees Cook , Daniel Diaz , David Gow , Arthur Grillo , Brendan Higgins , Naresh Kamboju , Maarten Lankhorst , Andrew Morton , Maxime Ripard , =?utf-8?b?VmlsbGUgU3lyasOkbMOk?= , Daniel Vetter , Thomas Zimmermann , dri-devel@lists.freedesktop.org, kunit-dev@googlegroups.com, linux-arch@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-doc@vger.kernel.org, linux-kernel@vger.kernel.org, linux-parisc@vger.kernel.org, linuxppc-dev@lists.ozlabs.org, linux-riscv@lists.infradead.org, linux-s390@vger.kernel.org, linux-sh@vger.kernel.org, loongarch@lists.linux.dev, netdev@vger.kernel.org, x86@kernel.org, Guenter Roeck , Linux Kernel Functional Testing Subject: [PATCH v3 05/15] drm: Suppress intentional warning backtraces in scaling unit tests Date: Wed, 3 Apr 2024 06:19:26 -0700 Message-Id: <20240403131936.787234-6-linux@roeck-us.net> X-Mailer: git-send-email 2.39.2 In-Reply-To: <20240403131936.787234-1-linux@roeck-us.net> References: <20240403131936.787234-1-linux@roeck-us.net> Precedence: bulk X-Mailing-List: linux-parisc@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 The drm_test_rect_calc_hscale and drm_test_rect_calc_vscale unit tests intentionally trigger warning backtraces by providing bad parameters to the tested functions. What is tested is the return value, not the existence of a warning backtrace. Suppress the backtraces to avoid clogging the kernel log and distraction from real problems. Tested-by: Linux Kernel Functional Testing Acked-by: Dan Carpenter Acked-by: Maíra Canal Cc: Maarten Lankhorst Cc: David Airlie Cc: Daniel Vetter Signed-off-by: Guenter Roeck --- v2: - Rebased to v6.9-rc1 - Added Tested-by:, Acked-by:, and Reviewed-by: tags v3: - Rebased to v6.9-rc2 drivers/gpu/drm/tests/drm_rect_test.c | 16 ++++++++++++++++ 1 file changed, 16 insertions(+) diff --git a/drivers/gpu/drm/tests/drm_rect_test.c b/drivers/gpu/drm/tests/drm_rect_test.c index 76332cd2ead8..66851769ee32 100644 --- a/drivers/gpu/drm/tests/drm_rect_test.c +++ b/drivers/gpu/drm/tests/drm_rect_test.c @@ -406,22 +406,38 @@ KUNIT_ARRAY_PARAM(drm_rect_scale, drm_rect_scale_cases, drm_rect_scale_case_desc static void drm_test_rect_calc_hscale(struct kunit *test) { + DEFINE_SUPPRESSED_WARNING(drm_calc_scale); const struct drm_rect_scale_case *params = test->param_value; int scaling_factor; + /* + * drm_rect_calc_hscale() generates a warning backtrace whenever bad + * parameters are passed to it. This affects all unit tests with an + * error code in expected_scaling_factor. + */ + START_SUPPRESSED_WARNING(drm_calc_scale); scaling_factor = drm_rect_calc_hscale(¶ms->src, ¶ms->dst, params->min_range, params->max_range); + END_SUPPRESSED_WARNING(drm_calc_scale); KUNIT_EXPECT_EQ(test, scaling_factor, params->expected_scaling_factor); } static void drm_test_rect_calc_vscale(struct kunit *test) { + DEFINE_SUPPRESSED_WARNING(drm_calc_scale); const struct drm_rect_scale_case *params = test->param_value; int scaling_factor; + /* + * drm_rect_calc_vscale() generates a warning backtrace whenever bad + * parameters are passed to it. This affects all unit tests with an + * error code in expected_scaling_factor. + */ + START_SUPPRESSED_WARNING(drm_calc_scale); scaling_factor = drm_rect_calc_vscale(¶ms->src, ¶ms->dst, params->min_range, params->max_range); + END_SUPPRESSED_WARNING(drm_calc_scale); KUNIT_EXPECT_EQ(test, scaling_factor, params->expected_scaling_factor); } From patchwork Wed Apr 3 13:19:27 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Guenter Roeck X-Patchwork-Id: 13616088 Received: from mail-pf1-f181.google.com (mail-pf1-f181.google.com [209.85.210.181]) (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 AF84E149DF0; Wed, 3 Apr 2024 13:19:54 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.210.181 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1712150396; cv=none; b=qWlIowxBoqOuezImpoLHVo+fSI/xDOr/Vy8/huzvu3qEwp9/pVmKcUuyY3QYwxI4hE1fF8ARxapdG1nC/95fvFy3MjDfKc8WfJsUX66CYEkZkZlirYWaIjXYlw93UCaLsiMkQtZd6U77GMrWNHrOj6chFxreYaqkerUgBoK7iQM= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1712150396; c=relaxed/simple; bh=euFd9pdOgYqNo0qCqbH/AlBY7kEWMpZ/eka8k6xSTcg=; h=From:To:Cc:Subject:Date:Message-Id:In-Reply-To:References: MIME-Version; b=dXiGtk2nK/mI/RyVojDhtGictCYYAKmIaQjSo6PVETvEQ2/G+UR7IuPhW3d5zRci8lhj1q7kpAJcvnzh8APtBQCvn5dy13wcgjy8gzf4FCEVDnpHKjxCd2ogbw4gkZ+A8DdE3DoGzOQnOD8nxXMSEHd9KgWl/SgIPPM4stbR8JA= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=none (p=none dis=none) header.from=roeck-us.net; spf=pass smtp.mailfrom=gmail.com; dkim=pass (2048-bit key) header.d=gmail.com header.i=@gmail.com header.b=mvRJZeCF; arc=none smtp.client-ip=209.85.210.181 Authentication-Results: smtp.subspace.kernel.org; dmarc=none (p=none dis=none) header.from=roeck-us.net 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="mvRJZeCF" Received: by mail-pf1-f181.google.com with SMTP id d2e1a72fcca58-6e7425a6714so5222870b3a.0; Wed, 03 Apr 2024 06:19:54 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20230601; t=1712150393; x=1712755193; darn=vger.kernel.org; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:sender:from:to:cc:subject:date :message-id:reply-to; bh=MvARuQ+3VmnrmzgmqFSmVu3cd4NVfa8l1fZDGFIcUBg=; b=mvRJZeCFy9RLfkzM9y8eEZ8gItsE9HDRAx+h9xFN7H3l+GfAHEDNc+qF35554bL4Un alxC7DfUTWnv9XbZqlLOTgvwtq50/UjxD0cBYbw2H4jBWAw7Gh5ahqtZDt3go7Rj4+tz vb1+2Lux6DUhvbqDyGv6g+66/OTZyS2U8EEtt5E10/SakY15lUH/JPeZJRGu1cp0hU8A 7Q2ucuS5qaKEKNETcf2qBimyYSLxjLmMPsvrkvSqA83/69UAXgifDPemQyszJ+XA/Tel 8JMLvTN72RPEBHopkPgPenYBMQ8SotfYVt32Ol6P8uFCEfeI99LgpxXAQKKI3p/NhFl9 XPtA== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1712150393; x=1712755193; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:sender:x-gm-message-state:from :to:cc:subject:date:message-id:reply-to; bh=MvARuQ+3VmnrmzgmqFSmVu3cd4NVfa8l1fZDGFIcUBg=; b=SbOK7RQSC3r7MgKcTJGVYH99Soqr0xqd+rF07CMB7tNdDUIM6hGxWIRPy3zemVdkIJ zReb4tPVHg2JrxQ/PZnzetvvL0q+VDqVM42NYUadIK5cm/wX8gx/u06t8awlWkpIAh34 kNU3+oqSjB2JUt/OcCHFJPFwlOLcQtxeQ9/r9vco7QA6FxEJpgFMU46ZTd8UQ9vKTh4c 7LdO26cJt42R2Wv+6chWIaiQBjE3Pa08I2c5BEVTWyg7Em4YUDmyt/W7qoBxc39i0LnK qt+Xu/wj9ECDSzHAZx0TwkHiBuRxVG5oUF+epm3bnR5v03Odro4oFQG8ESvw+5UpmD2k y6NQ== X-Forwarded-Encrypted: i=1; AJvYcCWPzjHzsNHmOKxgo3yYmgGxlt/sc0cUPco5YYtWrUeO6x/3mjXxRkG8z7/z9URuzZLxahpd3zfkSHvVI3paF1oVm6b64sBVlFeR+OxU0plXQ0YNPSPYNL13Ta6g8h8RTVXcw1y26MriqLd/3x6v8vG5ZGHXEOenWNrMclsH+L3Nrp7NFbVjgfwzW6EToWGpE+F89kVntFQcy3vsJNPijb9BwcqQvONgdtSuHc1Zr99W2sIikwPOuMSjjV+Hpahwchu5Hf5X7aPzvkYwpWXYBCVhQTGZ3/Gc0g20aet48uZBGDsuBC0NNi5c2xeI3aV1lA== X-Gm-Message-State: AOJu0YyUF2iwUlnH4UuNaDJJKtlgZrOYGusd+he0mEr60LKPca/fOLAB R5WO6yjgg/PTjw+g6pztc15E1CoghS7tIccgYHLiAsGXiyKpn9KLdha/h427 X-Google-Smtp-Source: AGHT+IFzkfgfwanXAd82f8i8ef5Fjpgbc/yneRFMHGOwV59qDNS3Awm153uRnJZYSeIbwOl4zm4JYA== X-Received: by 2002:a05:6a00:190b:b0:6ea:73d3:d3a with SMTP id y11-20020a056a00190b00b006ea73d30d3amr17312402pfi.22.1712150393007; Wed, 03 Apr 2024 06:19:53 -0700 (PDT) Received: from server.roeck-us.net ([2600:1700:e321:62f0:329c:23ff:fee3:9d7c]) by smtp.gmail.com with ESMTPSA id j3-20020a62b603000000b006e56bf07483sm11720837pff.77.2024.04.03.06.19.52 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Wed, 03 Apr 2024 06:19:52 -0700 (PDT) Sender: Guenter Roeck From: Guenter Roeck To: linux-kselftest@vger.kernel.org Cc: David Airlie , Arnd Bergmann , =?utf-8?q?Ma=C3=ADra_Canal?= , Dan Carpenter , Kees Cook , Daniel Diaz , David Gow , Arthur Grillo , Brendan Higgins , Naresh Kamboju , Maarten Lankhorst , Andrew Morton , Maxime Ripard , =?utf-8?b?VmlsbGUgU3lyasOkbMOk?= , Daniel Vetter , Thomas Zimmermann , dri-devel@lists.freedesktop.org, kunit-dev@googlegroups.com, linux-arch@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-doc@vger.kernel.org, linux-kernel@vger.kernel.org, linux-parisc@vger.kernel.org, linuxppc-dev@lists.ozlabs.org, linux-riscv@lists.infradead.org, linux-s390@vger.kernel.org, linux-sh@vger.kernel.org, loongarch@lists.linux.dev, netdev@vger.kernel.org, x86@kernel.org, Guenter Roeck , Linux Kernel Functional Testing , Jakub Kicinski , Eric Dumazet Subject: [PATCH v3 06/15] net: kunit: Suppress lock warning noise at end of dev_addr_lists tests Date: Wed, 3 Apr 2024 06:19:27 -0700 Message-Id: <20240403131936.787234-7-linux@roeck-us.net> X-Mailer: git-send-email 2.39.2 In-Reply-To: <20240403131936.787234-1-linux@roeck-us.net> References: <20240403131936.787234-1-linux@roeck-us.net> Precedence: bulk X-Mailing-List: linux-parisc@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 dev_addr_lists_test generates lock warning noise at the end of tests if lock debugging is enabled. There are two sets of warnings. WARNING: CPU: 0 PID: 689 at kernel/locking/mutex.c:923 __mutex_unlock_slowpath.constprop.0+0x13c/0x368 DEBUG_LOCKS_WARN_ON(__owner_task(owner) != __get_current()) WARNING: kunit_try_catch/1336 still has locks held! KUnit test cleanup is not guaranteed to run in the same thread as the test itself. For this test, this means that rtnl_lock() and rtnl_unlock() may be called from different threads. This triggers the warnings. Suppress the warnings because they are irrelevant for the test and just confusing and distracting. The first warning can be suppressed by using START_SUPPRESSED_WARNING() and END_SUPPRESSED_WARNING() around the call to rtnl_unlock(). To suppress the second warning, it is necessary to set debug_locks_silent while the rtnl lock is held. Tested-by: Linux Kernel Functional Testing Cc: David Gow Cc: Jakub Kicinski Cc: Eric Dumazet Acked-by: Dan Carpenter Signed-off-by: Guenter Roeck --- v2: - Rebased to v6.9-rc1 - Added Tested-by:, Acked-by:, and Reviewed-by: tags v3: - Rebased to v6.9-rc2 net/core/dev_addr_lists_test.c | 6 ++++++ 1 file changed, 6 insertions(+) diff --git a/net/core/dev_addr_lists_test.c b/net/core/dev_addr_lists_test.c index 4dbd0dc6aea2..b427dd1a3c93 100644 --- a/net/core/dev_addr_lists_test.c +++ b/net/core/dev_addr_lists_test.c @@ -1,6 +1,7 @@ // SPDX-License-Identifier: GPL-2.0-or-later #include +#include #include #include #include @@ -49,6 +50,7 @@ static int dev_addr_test_init(struct kunit *test) KUNIT_FAIL(test, "Can't register netdev %d", err); } + debug_locks_silent = 1; rtnl_lock(); return 0; } @@ -56,8 +58,12 @@ static int dev_addr_test_init(struct kunit *test) static void dev_addr_test_exit(struct kunit *test) { struct net_device *netdev = test->priv; + DEFINE_SUPPRESSED_WARNING(__mutex_unlock_slowpath); + START_SUPPRESSED_WARNING(__mutex_unlock_slowpath); rtnl_unlock(); + END_SUPPRESSED_WARNING(__mutex_unlock_slowpath); + debug_locks_silent = 0; unregister_netdev(netdev); free_netdev(netdev); } From patchwork Wed Apr 3 13:19:28 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Guenter Roeck X-Patchwork-Id: 13616089 Received: from mail-pl1-f171.google.com (mail-pl1-f171.google.com [209.85.214.171]) (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 CEC7E149E1B; Wed, 3 Apr 2024 13:19:55 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.214.171 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1712150397; cv=none; b=C/ohZooTdvMFMKwzQkLNOUoaoNjvQMiHU8xnq57khyoZc2iqsJ48fs8IjtMwdCfTbuk6jpe3JPpPtDIXfr3ZKjpyFp01jLdgxSLPPuqTyVGEUOSJssPDVNbeOqWN4ryA4coxB/3NE4Cm5s/NcCBJjCdwkBSHYbv9qy2Ce52Gusg= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1712150397; c=relaxed/simple; bh=Kg0z2PrQoRReOXjtrLEi52h24HarnnfhxKRaAaDyADY=; h=From:To:Cc:Subject:Date:Message-Id:In-Reply-To:References: MIME-Version; b=bVrARyvXuKd+sjcW8ccmQAOXxpjSOu8gZ8CucC2WYjklhXSF3qeAm+0EkLgmuZVN/0a2g5mrwHhnMV3OHzuF4Me5d5iLH6oPMidvedlb5lkqPCEC9O/RtDl4KJBSsvANYtvZzFTaZIopXyowIeuQ4VFhnu397gWUkYrdikJnF9I= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=none (p=none dis=none) header.from=roeck-us.net; spf=pass smtp.mailfrom=gmail.com; dkim=pass (2048-bit key) header.d=gmail.com header.i=@gmail.com header.b=hP2g0AfD; arc=none smtp.client-ip=209.85.214.171 Authentication-Results: smtp.subspace.kernel.org; dmarc=none (p=none dis=none) header.from=roeck-us.net 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="hP2g0AfD" Received: by mail-pl1-f171.google.com with SMTP id d9443c01a7336-1dff837d674so50252435ad.3; Wed, 03 Apr 2024 06:19:55 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20230601; t=1712150394; x=1712755194; darn=vger.kernel.org; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:sender:from:to:cc:subject:date :message-id:reply-to; bh=kz48OxP3NhYfgMKsflTw0/QUK/EsEKDn2LToBTsPHNQ=; b=hP2g0AfDoHZFvnL0luSMVUxwiR5yVYW7KZAIa7W9WW2e3kad388CvGRTxV9kQvfLit ewh9mFZ2MQkvSTYa5jflk6/ActGD5oyIrb0oOAclGC7eBVysTZ9MM5vweAhVVXAiiUJh LXa4sx53QWAzk0zeeQU75gKP9KRB+ux+4jOLoJ5601lc/XbBeRP5g2Y8rA+aU8ZsxvL9 OT9jMoNORJv+LMrgfSc0Cb2Mn8nTccwgd+uo4UO0Mq1CCvgu193TxTiEzw+lxm+vkWmJ fvuGfNPVAjDa1tCUaaIJFhPzX7jMeDeSoKJDC0ppx9FHOhVefNKqnzQjsOrdK88HHA6q viKA== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1712150394; x=1712755194; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:sender:x-gm-message-state:from :to:cc:subject:date:message-id:reply-to; bh=kz48OxP3NhYfgMKsflTw0/QUK/EsEKDn2LToBTsPHNQ=; b=ZDWrRNzOLnNEjCM9fUKXEY8cbAXuXq9VMvDzbQxtNNXiYGgQB0RIMKuw5LNdQPBhGH V2TGk0+uIGWZdXdiSgD5JhxnQdVPKvR1YPIIYXiHPAhTJhytK/qNUeq4llPeoZ1LW42N zdbQaopSIvPgkW8FBFLxcl0W58jrStyGz/xLWmCJ8+c8/iLtEHpuaUn0UR53Ei1GHlGG N/Y17YkunbUW1RWcadJ2jiSi/Q++m2vLWEyIF8teaLXVpWG2c5kNH2LwPocJ1Zg5Yvit Knl8S96rJOHhJI8czVolu4bzcvFrhs9PBZeGGpNtZaBQ2d46i1J9mZvCRIIdX/2NNZcd NW+Q== X-Forwarded-Encrypted: i=1; AJvYcCXhYycPqUSV7YML1xYWEyt3k1mF2WHV2AMfSwZhEdEt1QOp4uwyTtlABH73cyQZV/B6KrikJ1mUN8Z1Ej9mAJXt4cf27jxhbtHlReOuL5XfggVpQ57lePW1NObEKZ5la5thCAsX3AGqEVPfnxpFarBQlFZbOVUmbY9IxD5xLO47EoeLHkHhhhD4xs74KHuhFiYlRqojl22HjK2oFOV4tp2hi677M3Gd8G+NSddlF64EwLIV5RlwHVIlp5QAJMcv1atTGhBmdOPpMp/KRatvsvYRIeP9TXzFIfwGfmiuw26b8mtx7t1sSPW8yCuH+uB4QA== X-Gm-Message-State: AOJu0YxR2Az6LUf5fFXX0GTidOUTw5A6ay01H7MuyszuC9guZJUiu2WT CC9/P1nvRqubr7x5HSVmFKbKSa8TUG/FVcehB5APd76WIOnmjdf7pZ61o9cD X-Google-Smtp-Source: AGHT+IFNgcjVYp4BARBLtJXFan7xr/0CnX1zHuDDo3GwnVh2w9uqbZMBPA/s2jR8/t1K3n7W3FEYHw== X-Received: by 2002:a17:902:ec8b:b0:1e2:2e93:10ef with SMTP id x11-20020a170902ec8b00b001e22e9310efmr15831594plg.52.1712150394590; Wed, 03 Apr 2024 06:19:54 -0700 (PDT) Received: from server.roeck-us.net ([2600:1700:e321:62f0:329c:23ff:fee3:9d7c]) by smtp.gmail.com with ESMTPSA id h4-20020a170902704400b001e26e1e62f9sm3840318plt.176.2024.04.03.06.19.53 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Wed, 03 Apr 2024 06:19:54 -0700 (PDT) Sender: Guenter Roeck From: Guenter Roeck To: linux-kselftest@vger.kernel.org Cc: David Airlie , Arnd Bergmann , =?utf-8?q?Ma=C3=ADra_Canal?= , Dan Carpenter , Kees Cook , Daniel Diaz , David Gow , Arthur Grillo , Brendan Higgins , Naresh Kamboju , Maarten Lankhorst , Andrew Morton , Maxime Ripard , =?utf-8?b?VmlsbGUgU3lyasOkbMOk?= , Daniel Vetter , Thomas Zimmermann , dri-devel@lists.freedesktop.org, kunit-dev@googlegroups.com, linux-arch@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-doc@vger.kernel.org, linux-kernel@vger.kernel.org, linux-parisc@vger.kernel.org, linuxppc-dev@lists.ozlabs.org, linux-riscv@lists.infradead.org, linux-s390@vger.kernel.org, linux-sh@vger.kernel.org, loongarch@lists.linux.dev, netdev@vger.kernel.org, x86@kernel.org, Guenter Roeck , Linux Kernel Functional Testing , Thomas Gleixner , Ingo Molnar , Borislav Petkov , Dave Hansen Subject: [PATCH v3 07/15] x86: Add support for suppressing warning backtraces Date: Wed, 3 Apr 2024 06:19:28 -0700 Message-Id: <20240403131936.787234-8-linux@roeck-us.net> X-Mailer: git-send-email 2.39.2 In-Reply-To: <20240403131936.787234-1-linux@roeck-us.net> References: <20240403131936.787234-1-linux@roeck-us.net> Precedence: bulk X-Mailing-List: linux-parisc@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Add name of functions triggering warning backtraces to the __bug_table object section to enable support for suppressing WARNING backtraces. To limit image size impact, the pointer to the function name is only added to the __bug_table section if both CONFIG_KUNIT_SUPPRESS_BACKTRACE and CONFIG_DEBUG_BUGVERBOSE are enabled. Otherwise, the __func__ assembly parameter is replaced with a (dummy) NULL parameter to avoid an image size increase due to unused __func__ entries (this is necessary because __func__ is not a define but a virtual variable). Tested-by: Linux Kernel Functional Testing Acked-by: Dan Carpenter Cc: Thomas Gleixner Cc: Ingo Molnar Cc: Borislav Petkov Cc: Dave Hansen Signed-off-by: Guenter Roeck --- v2: - Rebased to v6.9-rc1 - Added Tested-by:, Acked-by:, and Reviewed-by: tags - Introduced KUNIT_SUPPRESS_BACKTRACE configuration option v3: - Rebased to v6.9-rc2 arch/x86/include/asm/bug.h | 21 ++++++++++++++++----- 1 file changed, 16 insertions(+), 5 deletions(-) diff --git a/arch/x86/include/asm/bug.h b/arch/x86/include/asm/bug.h index a3ec87d198ac..7698dfa74c98 100644 --- a/arch/x86/include/asm/bug.h +++ b/arch/x86/include/asm/bug.h @@ -23,18 +23,28 @@ #ifdef CONFIG_DEBUG_BUGVERBOSE +#ifdef CONFIG_KUNIT_SUPPRESS_BACKTRACE +# define HAVE_BUG_FUNCTION +# define __BUG_FUNC_PTR __BUG_REL(%c1) +# define __BUG_FUNC __func__ +#else +# define __BUG_FUNC_PTR +# define __BUG_FUNC NULL +#endif /* CONFIG_KUNIT_SUPPRESS_BACKTRACE */ + #define _BUG_FLAGS(ins, flags, extra) \ do { \ asm_inline volatile("1:\t" ins "\n" \ ".pushsection __bug_table,\"aw\"\n" \ "2:\t" __BUG_REL(1b) "\t# bug_entry::bug_addr\n" \ "\t" __BUG_REL(%c0) "\t# bug_entry::file\n" \ - "\t.word %c1" "\t# bug_entry::line\n" \ - "\t.word %c2" "\t# bug_entry::flags\n" \ - "\t.org 2b+%c3\n" \ + "\t" __BUG_FUNC_PTR "\t# bug_entry::function\n" \ + "\t.word %c2" "\t# bug_entry::line\n" \ + "\t.word %c3" "\t# bug_entry::flags\n" \ + "\t.org 2b+%c4\n" \ ".popsection\n" \ extra \ - : : "i" (__FILE__), "i" (__LINE__), \ + : : "i" (__FILE__), "i" (__BUG_FUNC), "i" (__LINE__),\ "i" (flags), \ "i" (sizeof(struct bug_entry))); \ } while (0) @@ -80,7 +90,8 @@ do { \ do { \ __auto_type __flags = BUGFLAG_WARNING|(flags); \ instrumentation_begin(); \ - _BUG_FLAGS(ASM_UD2, __flags, ASM_REACHABLE); \ + if (!IS_SUPPRESSED_WARNING(__func__)) \ + _BUG_FLAGS(ASM_UD2, __flags, ASM_REACHABLE); \ instrumentation_end(); \ } while (0) From patchwork Wed Apr 3 13:19:29 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Guenter Roeck X-Patchwork-Id: 13616090 Received: from mail-pl1-f170.google.com (mail-pl1-f170.google.com [209.85.214.170]) (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 F013C14A4E2; Wed, 3 Apr 2024 13:19:57 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.214.170 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1712150399; cv=none; b=aLZDyykgIqPDNtFet9oNzXRl077kc1brD75mHqDtT0aBqEH5fp3vSyBT5sDorzSRnctUOiICUM1nup9vNXJHMfNDVmVHMhe5H9J8ARZWnNwIwUtaV5CdORxkXbXXhMuFH9rl5k25AXSa4wHjQaHRnR65chwAS/PFxe1sZ43YWe8= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1712150399; c=relaxed/simple; bh=B/NNlS2N17miXcHeSXZpo3PO1m06tpCq1/6642pEKOs=; h=From:To:Cc:Subject:Date:Message-Id:In-Reply-To:References: MIME-Version; b=aklKMliFIZFDZfjBX3LPqp/HkwxbSThU3g9HwKbtbSML55pU2jbQlKDYdmUJIDMd7gA4aWA0a5jbIPdFef1XDpmuO+da/S6TIWZXhCXDgCX6zrZCnTYN6pQFb8KA6Tx1zCrAR4tqA8ywEUKFxkduWBXpjewAJBWgOevyz/ckIXo= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=none (p=none dis=none) header.from=roeck-us.net; spf=pass smtp.mailfrom=gmail.com; dkim=pass (2048-bit key) header.d=gmail.com header.i=@gmail.com header.b=iXNQ3Q8c; arc=none smtp.client-ip=209.85.214.170 Authentication-Results: smtp.subspace.kernel.org; dmarc=none (p=none dis=none) header.from=roeck-us.net 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="iXNQ3Q8c" Received: by mail-pl1-f170.google.com with SMTP id d9443c01a7336-1e0ae065d24so53957425ad.1; Wed, 03 Apr 2024 06:19:57 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20230601; t=1712150396; x=1712755196; darn=vger.kernel.org; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:sender:from:to:cc:subject:date :message-id:reply-to; bh=xkb1tQP+RY53Yd+dTVS3E48OfxPMmEiIEhGf0kaureE=; b=iXNQ3Q8ckZB7Xl0OrRoPRpqZTj30O6GcF3YO7bhRvrBfHpJYzPdfik6fCbsnlYdZar fFgpCybxt2qp+OkZtB1lJwCWuoAA9Y7SzVQsfpeTefZQZFhyE0bwPd22PCm+WMf1xVQ+ SB+3IKeFbrnlWBlScNWM2f0eJTxzEwUzEbuwbIAIYkVTLysfv59NenAhUOUwwr9DUtGk PFs8mNnisZqKwp9vdmO3oc9JxiegbJNyZNOf3oQfXh/Lr/xCY8lixOhgfTLAW0OCrISF EhvpLsgaighfTSqUoxbkGfwVWXtowi51kTbfcdqjTB7nmq89BynKXrQ1ZcIk5tt4uyR9 +rMw== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1712150396; x=1712755196; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:sender:x-gm-message-state:from :to:cc:subject:date:message-id:reply-to; bh=xkb1tQP+RY53Yd+dTVS3E48OfxPMmEiIEhGf0kaureE=; b=vTjfbMClDbErmN7RE1jfNmofgbd1tcsddISsLnNE1/xVXNcCVNFXGhsYZY99QGfjGd 9Qmr2eXQmY6L/RkpZVxLPGS60+xitaDqDsLkSlwxmfz1BYHpHRe8Bo+AZ2Vux8UNFpEQ Dc9bkB2F4la7/5dxqvfy76DG8bDxProYzcxDlYu+I6xoMJQKqlReFVD3pWGl4rLyxprd isv6R401YxoTGuPSFlCIYjQbb4VYCbNiMqCp2UyMoWe6OjTzxmgor+TIyIpPQet9FgyK +fvhuThMp2fBpgJBa3BxeRhT3PR0AnQ/qLhb2/E26cS7CmggBdU6zTYc9/CFrG8zJw4A k8Lg== X-Forwarded-Encrypted: i=1; AJvYcCXc3I5Od6B++mkm9lJxAtxPRYVdt45H2NbvUy2mdxr/N6O42WK1kDu0gNpqQ4hMMqqIJ4njKxNKVJl/hmqEUTSO8+p7anFWr2gVL/L77X28ClSRnrO/TZI+uQ/1qiF6PbJJIIn9kq+c2owdQa2r24tLIm71nyJQWJBMqiRXKXO5Y18dcS+dDN7yZ3K8rmIih5FPFwh3PBPNUi5XAzSTXlsdc0ve/fqJtph/236XY9DpGVFGtxNHxN4hnsIP4FqBcPDHmuCDpZq8TEPOk3+0FSfaJW2IlqdoBhN9e6PYy0J28YDwpawH7o9QniaCb4MPww== X-Gm-Message-State: AOJu0YzVjV17doZGHC+ByYnl58v51HpFDRY8oUiJ+GNJQh2UnB4YFg6H np0dynEs42HD+NBvMjPVOs6rA/dKkpB+/VAkSsVYhuWCnoh+SOCg/E9Qk6nR X-Google-Smtp-Source: AGHT+IEFIYqOYVWwVKGxmRZLqxD45VjqdbvtvChfTBAzSn1B79yxhWl03nHs5HLMNlC5fEEyMMkQQQ== X-Received: by 2002:a17:903:249:b0:1e0:1486:e808 with SMTP id j9-20020a170903024900b001e01486e808mr16191679plh.13.1712150396344; Wed, 03 Apr 2024 06:19:56 -0700 (PDT) Received: from server.roeck-us.net ([2600:1700:e321:62f0:329c:23ff:fee3:9d7c]) by smtp.gmail.com with ESMTPSA id l9-20020a170903120900b001e02875930asm13195748plh.25.2024.04.03.06.19.55 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Wed, 03 Apr 2024 06:19:55 -0700 (PDT) Sender: Guenter Roeck From: Guenter Roeck To: linux-kselftest@vger.kernel.org Cc: David Airlie , Arnd Bergmann , =?utf-8?q?Ma=C3=ADra_Canal?= , Dan Carpenter , Kees Cook , Daniel Diaz , David Gow , Arthur Grillo , Brendan Higgins , Naresh Kamboju , Maarten Lankhorst , Andrew Morton , Maxime Ripard , =?utf-8?b?VmlsbGUgU3lyasOkbMOk?= , Daniel Vetter , Thomas Zimmermann , dri-devel@lists.freedesktop.org, kunit-dev@googlegroups.com, linux-arch@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-doc@vger.kernel.org, linux-kernel@vger.kernel.org, linux-parisc@vger.kernel.org, linuxppc-dev@lists.ozlabs.org, linux-riscv@lists.infradead.org, linux-s390@vger.kernel.org, linux-sh@vger.kernel.org, loongarch@lists.linux.dev, netdev@vger.kernel.org, x86@kernel.org, Guenter Roeck , Linux Kernel Functional Testing , Catalin Marinas , Will Deacon Subject: [PATCH v3 08/15] arm64: Add support for suppressing warning backtraces Date: Wed, 3 Apr 2024 06:19:29 -0700 Message-Id: <20240403131936.787234-9-linux@roeck-us.net> X-Mailer: git-send-email 2.39.2 In-Reply-To: <20240403131936.787234-1-linux@roeck-us.net> References: <20240403131936.787234-1-linux@roeck-us.net> Precedence: bulk X-Mailing-List: linux-parisc@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Add name of functions triggering warning backtraces to the __bug_table object section to enable support for suppressing WARNING backtraces. To limit image size impact, the pointer to the function name is only added to the __bug_table section if both CONFIG_KUNIT_SUPPRESS_BACKTRACE and CONFIG_DEBUG_BUGVERBOSE are enabled. Otherwise, the __func__ assembly parameter is replaced with a (dummy) NULL parameter to avoid an image size increase due to unused __func__ entries (this is necessary because __func__ is not a define but a virtual variable). Tested-by: Linux Kernel Functional Testing Acked-by: Dan Carpenter Cc: Catalin Marinas Cc: Will Deacon Signed-off-by: Guenter Roeck --- v2: - Rebased to v6.9-rc1 - Added Tested-by:, Acked-by:, and Reviewed-by: tags - Introduced KUNIT_SUPPRESS_BACKTRACE configuration option v3: - Rebased to v6.9-rc2 arch/arm64/include/asm/asm-bug.h | 29 +++++++++++++++++++---------- arch/arm64/include/asm/bug.h | 8 +++++++- 2 files changed, 26 insertions(+), 11 deletions(-) diff --git a/arch/arm64/include/asm/asm-bug.h b/arch/arm64/include/asm/asm-bug.h index c762038ba400..c6d22e3cd840 100644 --- a/arch/arm64/include/asm/asm-bug.h +++ b/arch/arm64/include/asm/asm-bug.h @@ -8,36 +8,45 @@ #include #ifdef CONFIG_DEBUG_BUGVERBOSE -#define _BUGVERBOSE_LOCATION(file, line) __BUGVERBOSE_LOCATION(file, line) -#define __BUGVERBOSE_LOCATION(file, line) \ + +#ifdef CONFIG_KUNIT_SUPPRESS_BACKTRACE +# define HAVE_BUG_FUNCTION +# define __BUG_FUNC_PTR(func) .long func - .; +#else +# define __BUG_FUNC_PTR(func) +#endif + +#define _BUGVERBOSE_LOCATION(file, func, line) __BUGVERBOSE_LOCATION(file, func, line) +#define __BUGVERBOSE_LOCATION(file, func, line) \ .pushsection .rodata.str,"aMS",@progbits,1; \ 14472: .string file; \ .popsection; \ \ .long 14472b - .; \ + __BUG_FUNC_PTR(func) \ .short line; #else -#define _BUGVERBOSE_LOCATION(file, line) +#define _BUGVERBOSE_LOCATION(file, func, line) #endif #ifdef CONFIG_GENERIC_BUG -#define __BUG_ENTRY(flags) \ +#define __BUG_ENTRY(flags, func) \ .pushsection __bug_table,"aw"; \ .align 2; \ 14470: .long 14471f - .; \ -_BUGVERBOSE_LOCATION(__FILE__, __LINE__) \ - .short flags; \ +_BUGVERBOSE_LOCATION(__FILE__, func, __LINE__) \ + .short flags; \ .popsection; \ 14471: #else -#define __BUG_ENTRY(flags) +#define __BUG_ENTRY(flags, func) #endif -#define ASM_BUG_FLAGS(flags) \ - __BUG_ENTRY(flags) \ +#define ASM_BUG_FLAGS(flags, func) \ + __BUG_ENTRY(flags, func) \ brk BUG_BRK_IMM -#define ASM_BUG() ASM_BUG_FLAGS(0) +#define ASM_BUG() ASM_BUG_FLAGS(0, .) #endif /* __ASM_ASM_BUG_H */ diff --git a/arch/arm64/include/asm/bug.h b/arch/arm64/include/asm/bug.h index 28be048db3f6..044c5e24a17d 100644 --- a/arch/arm64/include/asm/bug.h +++ b/arch/arm64/include/asm/bug.h @@ -11,8 +11,14 @@ #include +#ifdef HAVE_BUG_FUNCTION +# define __BUG_FUNC __func__ +#else +# define __BUG_FUNC NULL +#endif + #define __BUG_FLAGS(flags) \ - asm volatile (__stringify(ASM_BUG_FLAGS(flags))); + asm volatile (__stringify(ASM_BUG_FLAGS(flags, %c0)) : : "i" (__BUG_FUNC)); #define BUG() do { \ __BUG_FLAGS(0); \ From patchwork Wed Apr 3 13:19:30 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Guenter Roeck X-Patchwork-Id: 13616091 Received: from mail-pf1-f172.google.com (mail-pf1-f172.google.com [209.85.210.172]) (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 65F9914A602; Wed, 3 Apr 2024 13:19:59 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.210.172 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1712150401; cv=none; b=aC7k3kW99b5Bka3Oi3W2eSVXkRDx4QvnJmGFzKQ0IvFQUfRj8tVK65At8udJhJT2coNcHFyZ6nuuB7uWGuu3z6OhmR5HJoOA1x+Uyb4NJN7QTuF0Qg4739iHn1tjmfCa12RZlD0RgXurq9gwhUgFEC26X0DfLFC4vB0U1TE8TpM= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1712150401; c=relaxed/simple; bh=0fLvUVIM8hMnJqHuv9ZzGmXuFPtZa8t4XuuwICdw7MQ=; h=From:To:Cc:Subject:Date:Message-Id:In-Reply-To:References: MIME-Version; b=gmxNdwFWx4d3aKpaNxzQZSTWmTnP6aDFiIMgXut1mtxm0TtPIX4Hd48gtxLzKKNsoIbxsB49E208/6r6e1kmtcT+eDDb4LzOKaiQBPDr9YHcchCj6K7L/lrSJ05wx21pps8zWE2xrxEQKZS/FbNnLNa7VvG9axmgVBxL2PDkun8= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=none (p=none dis=none) header.from=roeck-us.net; spf=pass smtp.mailfrom=gmail.com; dkim=pass (2048-bit key) header.d=gmail.com header.i=@gmail.com header.b=Nu4h4TrH; arc=none smtp.client-ip=209.85.210.172 Authentication-Results: smtp.subspace.kernel.org; dmarc=none (p=none dis=none) header.from=roeck-us.net 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="Nu4h4TrH" Received: by mail-pf1-f172.google.com with SMTP id d2e1a72fcca58-6e7425a6714so5223012b3a.0; Wed, 03 Apr 2024 06:19:59 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20230601; t=1712150398; x=1712755198; darn=vger.kernel.org; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:sender:from:to:cc:subject:date :message-id:reply-to; bh=W4Cw0LtOjrrGR/zeu8wuFTPQ/EpLq4I/3itsXmN/APU=; b=Nu4h4TrHzw6HDvBQjtBm3Axj4w4ZsmMHl984Pby1VZ7P0SJAv/VAN4KJxl3Qn1/rXf ulvJvpOVUg6WEhlIHozTuOsRI9Rxpwe8JXcPoPnt1dEwcCxRb2A0Odmqf0novqR5z8f+ 4C3w416CqqVygXZua5K9IDhuAS4Xsn5dJrJBzQ+qc1rpWrvTN2ddnn3Pje8U3AJmGhP6 dVdOk+YxUBIa1oXbTgI7iCxDoivyhSXlZG6kDGpqtYJn8OYTVLkq5eBpX06Y4h76uQ65 RUKPep/yh4YS0nvJKaU1A+3XSnMwz6O0aA46ypYp6j8zrL6OBb7R5bD84e7iwD6iN154 3FPQ== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1712150398; x=1712755198; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:sender:x-gm-message-state:from :to:cc:subject:date:message-id:reply-to; bh=W4Cw0LtOjrrGR/zeu8wuFTPQ/EpLq4I/3itsXmN/APU=; b=JlUWaeJch2h1jenU2gzuzukIPAtHUyzE/ah1oxY3fGOl6gpAn+N8ZSaCDQL/yKDGtz cR6IJeaB+AwKGftMftOFmHJyDk8Czmvuj4YIeWBQOEgMxxR/89FgBVGhdxivdmbJKZy9 4G2L7yKgLpb2GUhwwLQgCX2ZK38gipGmAt1N2qMjq6EzHklIZ637JuFdsX0Jp1yiNYY6 ULzeEuCAc3mV1LFEvgIb/7tjVNm3lxB8dtN20YyUyCed3Cvtlk4XANoikM4f7iqz2yhm POXO4t0/79fTKJbEqLYMV6XKL0UnkljbTS5wpszyj2ROUurrLm+7FSVyvCYWIjsNCbYU pM8w== X-Forwarded-Encrypted: i=1; AJvYcCWskwg6iFlsXWTN9vpJOEtZzi4UDZJNIhdBWsqVEt14ut2xidLtCbN7B3fi6nnJYszN6wirixNs1JJEMGdFfInfQP4c1LAe64pFQVId4+Ru4w8X/RJrhNwQPZuO/0COPGVckeeSTXL2xjdrcd7BluBd+j5zVlMwhDqlUXvr51JruJjWe3/4+lDtVmYdWpBZfpj1QkZJUh1RbVK7n17mIaCxCnDh8vfuHB0IerGqCmSquRs+RMEXjXJi0Dons9WsRTSo4d1EZlO8IMenLVrYcdxiamJnkfzsfj5D6QmHg4xQG6IulW3NfnIpfCMEaw7w/Q== X-Gm-Message-State: AOJu0Yx+MDsUFGPnmZQCO/q2LQ6SesPelNK1L+BWLmByv33Gx0XsKL6z vLm70lFxUn44yNXF5b/WGYIQDWuVoggkuBDnEkPc3O6yrd+Um4uPoooUlQrK X-Google-Smtp-Source: AGHT+IFWFkTPmr0egylKtq40e/om3PfbjESX8Y3agDhfM9FAMg7tTYjJ0Fk7T/XrXLnOhqzCRkHQ4g== X-Received: by 2002:a17:903:41c4:b0:1e0:a0d5:1d23 with SMTP id u4-20020a17090341c400b001e0a0d51d23mr17965782ple.29.1712150397884; Wed, 03 Apr 2024 06:19:57 -0700 (PDT) Received: from server.roeck-us.net ([2600:1700:e321:62f0:329c:23ff:fee3:9d7c]) by smtp.gmail.com with ESMTPSA id i10-20020a17090332ca00b001e0f504a74csm13199577plr.269.2024.04.03.06.19.57 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Wed, 03 Apr 2024 06:19:57 -0700 (PDT) Sender: Guenter Roeck From: Guenter Roeck To: linux-kselftest@vger.kernel.org Cc: David Airlie , Arnd Bergmann , =?utf-8?q?Ma=C3=ADra_Canal?= , Dan Carpenter , Kees Cook , Daniel Diaz , David Gow , Arthur Grillo , Brendan Higgins , Naresh Kamboju , Maarten Lankhorst , Andrew Morton , Maxime Ripard , =?utf-8?b?VmlsbGUgU3lyasOkbMOk?= , Daniel Vetter , Thomas Zimmermann , dri-devel@lists.freedesktop.org, kunit-dev@googlegroups.com, linux-arch@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-doc@vger.kernel.org, linux-kernel@vger.kernel.org, linux-parisc@vger.kernel.org, linuxppc-dev@lists.ozlabs.org, linux-riscv@lists.infradead.org, linux-s390@vger.kernel.org, linux-sh@vger.kernel.org, loongarch@lists.linux.dev, netdev@vger.kernel.org, x86@kernel.org, Guenter Roeck , Linux Kernel Functional Testing , Huacai Chen Subject: [PATCH v3 09/15] loongarch: Add support for suppressing warning backtraces Date: Wed, 3 Apr 2024 06:19:30 -0700 Message-Id: <20240403131936.787234-10-linux@roeck-us.net> X-Mailer: git-send-email 2.39.2 In-Reply-To: <20240403131936.787234-1-linux@roeck-us.net> References: <20240403131936.787234-1-linux@roeck-us.net> Precedence: bulk X-Mailing-List: linux-parisc@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Add name of functions triggering warning backtraces to the __bug_table object section to enable support for suppressing WARNING backtraces. To limit image size impact, the pointer to the function name is only added to the __bug_table section if both CONFIG_KUNIT_SUPPRESS_BACKTRACE and CONFIG_DEBUG_BUGVERBOSE are enabled. Otherwise, the __func__ assembly parameter is replaced with a (dummy) NULL parameter to avoid an image size increase due to unused __func__ entries (this is necessary because __func__ is not a define but a virtual variable). Tested-by: Linux Kernel Functional Testing Acked-by: Dan Carpenter Cc: Huacai Chen Signed-off-by: Guenter Roeck --- v2: - Rebased to v6.9-rc1; resolved context conflict - Added Tested-by:, Acked-by:, and Reviewed-by: tags - Introduced KUNIT_SUPPRESS_BACKTRACE configuration option v3: - Rebased to v6.9-rc2; resolved context conflict arch/loongarch/include/asm/bug.h | 38 +++++++++++++++++++++++--------- 1 file changed, 27 insertions(+), 11 deletions(-) diff --git a/arch/loongarch/include/asm/bug.h b/arch/loongarch/include/asm/bug.h index 08388876ade4..193f396d81a0 100644 --- a/arch/loongarch/include/asm/bug.h +++ b/arch/loongarch/include/asm/bug.h @@ -3,47 +3,63 @@ #define __ASM_BUG_H #include +#include #include #ifndef CONFIG_DEBUG_BUGVERBOSE -#define _BUGVERBOSE_LOCATION(file, line) +#define _BUGVERBOSE_LOCATION(file, func, line) #else -#define __BUGVERBOSE_LOCATION(file, line) \ +#ifdef CONFIG_KUNIT_SUPPRESS_BACKTRACE +# define HAVE_BUG_FUNCTION +# define __BUG_FUNC_PTR(func) .long func - .; +#else +# define __BUG_FUNC_PTR(func) +#endif /* CONFIG_KUNIT_SUPPRESS_BACKTRACE */ + +#define __BUGVERBOSE_LOCATION(file, func, line) \ .pushsection .rodata.str, "aMS", @progbits, 1; \ 10002: .string file; \ .popsection; \ \ .long 10002b - .; \ + __BUG_FUNC_PTR(func) \ .short line; -#define _BUGVERBOSE_LOCATION(file, line) __BUGVERBOSE_LOCATION(file, line) +#define _BUGVERBOSE_LOCATION(file, func, line) __BUGVERBOSE_LOCATION(file, func, line) #endif #ifndef CONFIG_GENERIC_BUG -#define __BUG_ENTRY(flags) +#define __BUG_ENTRY(flags, func) #else -#define __BUG_ENTRY(flags) \ +#define __BUG_ENTRY(flags, func) \ .pushsection __bug_table, "aw"; \ .align 2; \ 10000: .long 10001f - .; \ - _BUGVERBOSE_LOCATION(__FILE__, __LINE__) \ + _BUGVERBOSE_LOCATION(__FILE__, func, __LINE__) \ .short flags; \ .popsection; \ 10001: #endif -#define ASM_BUG_FLAGS(flags) \ - __BUG_ENTRY(flags) \ +#define ASM_BUG_FLAGS(flags, func) \ + __BUG_ENTRY(flags, func) \ break BRK_BUG -#define ASM_BUG() ASM_BUG_FLAGS(0) +#define ASM_BUG() ASM_BUG_FLAGS(0, .) + +#ifdef HAVE_BUG_FUNCTION +# define __BUG_FUNC __func__ +#else +# define __BUG_FUNC NULL +#endif #define __BUG_FLAGS(flags) \ - asm_inline volatile (__stringify(ASM_BUG_FLAGS(flags))); + asm_inline volatile (__stringify(ASM_BUG_FLAGS(flags, %0)) : : "i" (__BUG_FUNC)); #define __WARN_FLAGS(flags) \ do { \ instrumentation_begin(); \ - __BUG_FLAGS(BUGFLAG_WARNING|(flags)); \ + if (!IS_SUPPRESSED_WARNING(__func__)) \ + __BUG_FLAGS(BUGFLAG_WARNING|(flags)); \ annotate_reachable(); \ instrumentation_end(); \ } while (0) From patchwork Wed Apr 3 13:19:31 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Guenter Roeck X-Patchwork-Id: 13616092 Received: from mail-pl1-f179.google.com (mail-pl1-f179.google.com [209.85.214.179]) (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 0353514A63A; Wed, 3 Apr 2024 13:20:00 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.214.179 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1712150402; cv=none; b=ai5qga1eJZVwAQr9WHNzUi0MGHlrd9wi3XHKEq55AKEqfvHJOrowNxRMGw7cz7SKKiP2Ix92koSvAAKghTxp0NCHPQzuwm24O9z6eaowz+xMuzXdhUQWcPMKBvaeCPtelxbiNkHb/6GTvlQlci7+LBDvTSeH+QtVfEy6oxoVTYc= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1712150402; c=relaxed/simple; bh=mB5dRAwCZwGdxvivIII9kjFblTdf+kQMWEar8P8iGWs=; h=From:To:Cc:Subject:Date:Message-Id:In-Reply-To:References: MIME-Version; b=MgXz8YDEC46DljSk0jfUVDGv33Y/LHx7/IucNyAP5HV7/My4HwW/eVXk3SlApqM1z3SW0+G2xyLlM2glfs5nW1LK1hQW1EE5iOf10vSsUr5pXBx7cgKBVo7m7R2Ynv6xnnzbmAJpWxeLmkXgx8yNhQrt/kmfRm9kqeZ0uabM02s= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=none (p=none dis=none) header.from=roeck-us.net; spf=pass smtp.mailfrom=gmail.com; dkim=pass (2048-bit key) header.d=gmail.com header.i=@gmail.com header.b=hwCPn0rP; arc=none smtp.client-ip=209.85.214.179 Authentication-Results: smtp.subspace.kernel.org; dmarc=none (p=none dis=none) header.from=roeck-us.net 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="hwCPn0rP" Received: by mail-pl1-f179.google.com with SMTP id d9443c01a7336-1e0d8403257so49724345ad.1; Wed, 03 Apr 2024 06:20:00 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20230601; t=1712150399; x=1712755199; darn=vger.kernel.org; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:sender:from:to:cc:subject:date :message-id:reply-to; bh=9dfx4BAIsIiEeZYorwHVQiaeI+Aj0IBngtjLPvcVHyE=; b=hwCPn0rPqFZsGGuPZTuRFpRmHiMkoMaSeZnr5bGI60aWED8YRy0B9flsJb7g2/cpaX SelFx0m5PmhgfxKlaeTqiuRMOgPvtBNj+/qW0qL3EVyVky5/Kdl9XjoaUi0zPp5zKmOD Rj/AScUkaRIa3boh4YcenGID8OnParTeKfZtd9S//JOpTUImoh1ZD04/W9IedZ2NNsRj 1kavt6i4hmujjhdSQVzq6HgB1jMswvj4B5FvaEz5HuxvrdGA94yvUpVcJCRYSgr87Qa9 615t9QPfIX5BOzPdRSx6KoLPOYFq7oU4xtZ7tX38tCP2fowR+PLzp8XH84B/PSJljpzz Ri9Q== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1712150399; x=1712755199; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:sender:x-gm-message-state:from :to:cc:subject:date:message-id:reply-to; bh=9dfx4BAIsIiEeZYorwHVQiaeI+Aj0IBngtjLPvcVHyE=; b=A+NEQ+lZzMdO7A7bLaB+8+fEAfEdHrVzKnJBeJqMai8ScJdTiXA1uIOSF4XASF2OCe txMJo079e4GpcsEb1AXrXNduToVrba4UAPu3y1uMDO3tbG0kieEi5VJwqS+YvgO2rLsM VlNIf4XRBsnXEhR+BwtqHEiVFu09jW/WyKWFbESLaa01fVy+rpKEvgAEjaIgnDiUU9P0 DHVqH4U4XGBHWUjAm51kvukOrNw0W48NDOc0gkD+pWA3751hMI0aYrjOSagrUkRM/m5q OzSLBodUz/RYNMojl4iLcnr/NvnnpSpdiAFB9Z50virHX0NvWTtfSis1kTaCG3tBAhJB nK0Q== X-Forwarded-Encrypted: i=1; AJvYcCWSNpS5Ad3zdUSNWqRPrkdhar2ciRtu4QGHpHQiPgn5aXsm6pD7q5cP4vXxcm73ck6uYhrJKK61kwk6Pdmtvf1OOz4/pIdr1Ssc9g29RdXSzmvNFGu4fqSOJp6KDhwGQYDRTMmCLmlgznJw8fLsjII/gxfPUcZ0kOsPwjgDyjGjZ+PMqBU5+lXwLBPmEqwL/9rqWqf3oGkJNGw30ZcmxtqmnYDWjaQtGI+DF4sqo0l6uYvmksqPzMdSpIGeBEJ8EhdoiZZLN4NT2g8A5mYxKDPUN1scGuA79qqM4zx1pefk6oHOoh/gmdOeOvNPAljENQ== X-Gm-Message-State: AOJu0YxHQjf4+DfXGzOkgZAE5qAlOs2hMLOTt3fGi7TTMg005eQYAci/ DwezFzPH20S0FzDgdCMOCbMpUk8NkPzbRce+S0XB4quWO8irp1SynArLyGEC X-Google-Smtp-Source: AGHT+IGbWkjRTcooZ5OE5cFx+wdKtwDNdTLrjwriJaWh51uLS/GGpEV8fzA7vGhwR64nNp+19Aq+wg== X-Received: by 2002:a17:902:d4c4:b0:1e2:a0cf:c3dd with SMTP id o4-20020a170902d4c400b001e2a0cfc3ddmr376556plg.7.1712150399532; Wed, 03 Apr 2024 06:19:59 -0700 (PDT) Received: from server.roeck-us.net ([2600:1700:e321:62f0:329c:23ff:fee3:9d7c]) by smtp.gmail.com with ESMTPSA id l11-20020a170903120b00b001dddaa7d046sm13268622plh.29.2024.04.03.06.19.58 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Wed, 03 Apr 2024 06:19:58 -0700 (PDT) Sender: Guenter Roeck From: Guenter Roeck To: linux-kselftest@vger.kernel.org Cc: David Airlie , Arnd Bergmann , =?utf-8?q?Ma=C3=ADra_Canal?= , Dan Carpenter , Kees Cook , Daniel Diaz , David Gow , Arthur Grillo , Brendan Higgins , Naresh Kamboju , Maarten Lankhorst , Andrew Morton , Maxime Ripard , =?utf-8?b?VmlsbGUgU3lyasOkbMOk?= , Daniel Vetter , Thomas Zimmermann , dri-devel@lists.freedesktop.org, kunit-dev@googlegroups.com, linux-arch@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-doc@vger.kernel.org, linux-kernel@vger.kernel.org, linux-parisc@vger.kernel.org, linuxppc-dev@lists.ozlabs.org, linux-riscv@lists.infradead.org, linux-s390@vger.kernel.org, linux-sh@vger.kernel.org, loongarch@lists.linux.dev, netdev@vger.kernel.org, x86@kernel.org, Guenter Roeck , Linux Kernel Functional Testing , Helge Deller Subject: [PATCH v3 10/15] parisc: Add support for suppressing warning backtraces Date: Wed, 3 Apr 2024 06:19:31 -0700 Message-Id: <20240403131936.787234-11-linux@roeck-us.net> X-Mailer: git-send-email 2.39.2 In-Reply-To: <20240403131936.787234-1-linux@roeck-us.net> References: <20240403131936.787234-1-linux@roeck-us.net> Precedence: bulk X-Mailing-List: linux-parisc@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Add name of functions triggering warning backtraces to the __bug_table object section to enable support for suppressing WARNING backtraces. To limit image size impact, the pointer to the function name is only added to the __bug_table section if both CONFIG_KUNIT_SUPPRESS_BACKTRACE and CONFIG_DEBUG_BUGVERBOSE are enabled. Otherwise, the __func__ assembly parameter is replaced with a (dummy) NULL parameter to avoid an image size increase due to unused __func__ entries (this is necessary because __func__ is not a define but a virtual variable). While at it, declare assembler parameters as constants where possible. Refine .blockz instructions to calculate the necessary padding instead of using fixed values. Tested-by: Linux Kernel Functional Testing Acked-by: Dan Carpenter Acked-by: Helge Deller Signed-off-by: Guenter Roeck --- v2: - Rebased to v6.9-rc1 - Added Tested-by:, Acked-by:, and Reviewed-by: tags - Introduced KUNIT_SUPPRESS_BACKTRACE configuration option v3: - Rebased to v6.9-rc2 arch/parisc/include/asm/bug.h | 29 +++++++++++++++++++++-------- 1 file changed, 21 insertions(+), 8 deletions(-) diff --git a/arch/parisc/include/asm/bug.h b/arch/parisc/include/asm/bug.h index 833555f74ffa..b59c3f7380bf 100644 --- a/arch/parisc/include/asm/bug.h +++ b/arch/parisc/include/asm/bug.h @@ -23,8 +23,17 @@ # define __BUG_REL(val) ".word " __stringify(val) #endif - #ifdef CONFIG_DEBUG_BUGVERBOSE + +#ifdef CONFIG_KUNIT_SUPPRESS_BACKTRACE +# define HAVE_BUG_FUNCTION +# define __BUG_FUNC_PTR __BUG_REL(%c1) +# define __BUG_FUNC __func__ +#else +# define __BUG_FUNC_PTR +# define __BUG_FUNC NULL +#endif /* CONFIG_KUNIT_SUPPRESS_BACKTRACE */ + #define BUG() \ do { \ asm volatile("\n" \ @@ -33,10 +42,12 @@ "\t.align 4\n" \ "2:\t" __BUG_REL(1b) "\n" \ "\t" __BUG_REL(%c0) "\n" \ - "\t.short %1, %2\n" \ - "\t.blockz %3-2*4-2*2\n" \ + "\t" __BUG_FUNC_PTR "\n" \ + "\t.short %c2, %c3\n" \ + "\t.blockz %c4-(.-2b)\n" \ "\t.popsection" \ - : : "i" (__FILE__), "i" (__LINE__), \ + : : "i" (__FILE__), "i" (__BUG_FUNC), \ + "i" (__LINE__), \ "i" (0), "i" (sizeof(struct bug_entry)) ); \ unreachable(); \ } while(0) @@ -58,10 +69,12 @@ "\t.align 4\n" \ "2:\t" __BUG_REL(1b) "\n" \ "\t" __BUG_REL(%c0) "\n" \ - "\t.short %1, %2\n" \ - "\t.blockz %3-2*4-2*2\n" \ + "\t" __BUG_FUNC_PTR "\n" \ + "\t.short %c2, %3\n" \ + "\t.blockz %c4-(.-2b)\n" \ "\t.popsection" \ - : : "i" (__FILE__), "i" (__LINE__), \ + : : "i" (__FILE__), "i" (__BUG_FUNC), \ + "i" (__LINE__), \ "i" (BUGFLAG_WARNING|(flags)), \ "i" (sizeof(struct bug_entry)) ); \ } while(0) @@ -74,7 +87,7 @@ "\t.align 4\n" \ "2:\t" __BUG_REL(1b) "\n" \ "\t.short %0\n" \ - "\t.blockz %1-4-2\n" \ + "\t.blockz %c1-(.-2b)\n" \ "\t.popsection" \ : : "i" (BUGFLAG_WARNING|(flags)), \ "i" (sizeof(struct bug_entry)) ); \ From patchwork Wed Apr 3 13:19:32 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Guenter Roeck X-Patchwork-Id: 13616093 Received: from mail-pl1-f180.google.com (mail-pl1-f180.google.com [209.85.214.180]) (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 75A1514B070; Wed, 3 Apr 2024 13:20:02 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.214.180 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1712150404; cv=none; b=BVTLUzPDmuMMdkd+M8SYNIHtT2wz0eBKnHd0xwgqhYetdT2pV6Km3HSMcU/yglgKDsE2Sq2eYxp5TZnlXjWmOY1qaC91X/M8VrTt17J5RYCK037j10/ZPE2ASFJZPww7AX+CxkgR38L0AasO6J1BUpmggDUv47CohcrD84ocFuw= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1712150404; c=relaxed/simple; bh=sRCoD7CA4VHB2FMUeBuju4gSTZ7VzEchcpaWHda2dww=; h=From:To:Cc:Subject:Date:Message-Id:In-Reply-To:References: MIME-Version; b=ckmX0n19xHAPsPfsbElNzDJUaoTqkF2ySdMXHSPJFLqLBlhhC7l3CHuTOhxGqQ5xRnHtYLagFpXcGBPBCBQaO8HFzPqf9IYciXHKkVQaReOnFPA3vIsbFHeW6Qh/OfRH6TM1ZsGgZixX+XyIKsFLvZtGI5T36iVo689tgSDSzlo= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=none (p=none dis=none) header.from=roeck-us.net; spf=pass smtp.mailfrom=gmail.com; dkim=pass (2048-bit key) header.d=gmail.com header.i=@gmail.com header.b=S7C8F9AR; arc=none smtp.client-ip=209.85.214.180 Authentication-Results: smtp.subspace.kernel.org; dmarc=none (p=none dis=none) header.from=roeck-us.net 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="S7C8F9AR" Received: by mail-pl1-f180.google.com with SMTP id d9443c01a7336-1e2232e30f4so48584165ad.2; Wed, 03 Apr 2024 06:20:02 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20230601; t=1712150401; x=1712755201; darn=vger.kernel.org; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:sender:from:to:cc:subject:date :message-id:reply-to; bh=klYg8xMT6MjrhYgIxkpLnDg0Lyaa6cQfR4UsA0LeN2U=; b=S7C8F9ARAqqkqiRMHkFMWEvmUcQHdnDPy0r9jq/Zs9aT8wV/Fqpa2du/cqwxSq5gUu U5WqCJDXjTs1iksXAyr8jdbdxW2mp3siXOu5+DJ8CGhZw7DV0lOfBUzHgav0dalhDIOt UiHh5/vup2R0waShyCcd44OrqdgyLk3Hv5K74kZE24HMdtOJbFoI03wfFSuMBUxvK58M Wvv9t/bqIe++nLH8nljNKovakHfxuR4q9rW7NqVQV5na5nU5cY7TnNpvSCkvSLmcki+0 +a1hgZj4nMxE9qKT7j/mWPXSfCTcqk79eleRDYNaY7dtWpzWwLv1MKCOvuPhMjQ1qoBD 7Q1g== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1712150401; x=1712755201; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:sender:x-gm-message-state:from :to:cc:subject:date:message-id:reply-to; bh=klYg8xMT6MjrhYgIxkpLnDg0Lyaa6cQfR4UsA0LeN2U=; b=pa7NI++45hSzgryiDx4VsL7YbcztTlEJdxRG/awZFIsY+gmBvpKjxPxJPMVff0DA+o 96ylb5Xm4lTuXwLg/2Dvo/ck8xe+h+yO4/vtKWKnZB6x8aHSZ20/S8NzoKy+komahO14 PoFtQmd7JjXpkGD2cC0nXF79uwJCRoLLpvjj0Mld+VoK05CrLAPaO1nDjnR2azRJp/Dh u5XiOPWOzvfnEKR7z98onWwG9gRR6a1Oh/C4KoX4TtSnwiXbUViVaVEl9iVBKj09tu11 HJGKtr9F78N+nHF1Uub57QGFPj6Fwki2iPAA8E8zyfWXaBDfbUPc6Y2OpHaLqiVltrqi LX+g== X-Forwarded-Encrypted: i=1; AJvYcCUTcKlWUT4NmFo0jtTEF4UgbSlQ0y2Mw3ad25UxQC0RnXkArR9xnHKUtna6hJ9IIFQc1jcV/3El38FFFD2SxsCsPlDchkJ4GDTooJHbarL7OnPLqxJQfFI8thJI4rpsUiONGpONs6VGoVoPX9Yoryqrd+FVDrcViCZ69ZyRmSLmtNAzFDf848VPiM8kgDbtHMbP0rsjnj0/Mk/kSJiXBPRG8uIPzE5WBBQoUtWL3dlua3K0/VxXpkOs/T1AZquZOWOq9TSqyw9SMfnfwp4Rwq0vhkcZ2Jh/jlvtqSf/Aay4nkuB28FzUU9zc7cD4rBKlA== X-Gm-Message-State: AOJu0YyROf0VLnl5C5VS+cbATZdefkieaK/3GdNkJxqpdDGDejEOY6xh vlU9nE9fdTu9KGeLvodqN4BgdzPp2tdx2Afq96wy8Nq+dzRwx6M2RUWU+J4s X-Google-Smtp-Source: AGHT+IEMqe589WW9yt5k/lfzrxxoDYVpXeSOxtyZyHF9LDTCjhOnJNt1j89G1vs1iICWdJ7uWy226Q== X-Received: by 2002:a17:902:bb16:b0:1e0:b871:53f1 with SMTP id im22-20020a170902bb1600b001e0b87153f1mr12301982plb.31.1712150401114; Wed, 03 Apr 2024 06:20:01 -0700 (PDT) Received: from server.roeck-us.net ([2600:1700:e321:62f0:329c:23ff:fee3:9d7c]) by smtp.gmail.com with ESMTPSA id x3-20020a170902a38300b001e2461c52c6sm9309915pla.149.2024.04.03.06.20.00 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Wed, 03 Apr 2024 06:20:00 -0700 (PDT) Sender: Guenter Roeck From: Guenter Roeck To: linux-kselftest@vger.kernel.org Cc: David Airlie , Arnd Bergmann , =?utf-8?q?Ma=C3=ADra_Canal?= , Dan Carpenter , Kees Cook , Daniel Diaz , David Gow , Arthur Grillo , Brendan Higgins , Naresh Kamboju , Maarten Lankhorst , Andrew Morton , Maxime Ripard , =?utf-8?b?VmlsbGUgU3lyasOkbMOk?= , Daniel Vetter , Thomas Zimmermann , dri-devel@lists.freedesktop.org, kunit-dev@googlegroups.com, linux-arch@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-doc@vger.kernel.org, linux-kernel@vger.kernel.org, linux-parisc@vger.kernel.org, linuxppc-dev@lists.ozlabs.org, linux-riscv@lists.infradead.org, linux-s390@vger.kernel.org, linux-sh@vger.kernel.org, loongarch@lists.linux.dev, netdev@vger.kernel.org, x86@kernel.org, Guenter Roeck , Linux Kernel Functional Testing , Heiko Carstens , Vasily Gorbik , Alexander Gordeev Subject: [PATCH v3 11/15] s390: Add support for suppressing warning backtraces Date: Wed, 3 Apr 2024 06:19:32 -0700 Message-Id: <20240403131936.787234-12-linux@roeck-us.net> X-Mailer: git-send-email 2.39.2 In-Reply-To: <20240403131936.787234-1-linux@roeck-us.net> References: <20240403131936.787234-1-linux@roeck-us.net> Precedence: bulk X-Mailing-List: linux-parisc@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Add name of functions triggering warning backtraces to the __bug_table object section to enable support for suppressing WARNING backtraces. To limit image size impact, the pointer to the function name is only added to the __bug_table section if both CONFIG_KUNIT_SUPPRESS_BACKTRACE and CONFIG_DEBUG_BUGVERBOSE are enabled. Otherwise, the __func__ assembly parameter is replaced with a (dummy) NULL parameter to avoid an image size increase due to unused __func__ entries (this is necessary because __func__ is not a define but a virtual variable). Tested-by: Linux Kernel Functional Testing Acked-by: Dan Carpenter Cc: Heiko Carstens Cc: Vasily Gorbik Cc: Alexander Gordeev Signed-off-by: Guenter Roeck --- v2: - Rebased to v6.9-rc1 (simplified assembler changes after upstream commit 3938490e78f4 ("s390/bug: remove entry size from __bug_table section") - Added Tested-by:, Acked-by:, and Reviewed-by: tags - Introduced KUNIT_SUPPRESS_BACKTRACE configuration option v3: - Rebased to v6.9-rc2 arch/s390/include/asm/bug.h | 17 ++++++++++++++--- 1 file changed, 14 insertions(+), 3 deletions(-) diff --git a/arch/s390/include/asm/bug.h b/arch/s390/include/asm/bug.h index c500d45fb465..44d4e9f24ae0 100644 --- a/arch/s390/include/asm/bug.h +++ b/arch/s390/include/asm/bug.h @@ -8,6 +8,15 @@ #ifdef CONFIG_DEBUG_BUGVERBOSE +#ifdef CONFIG_KUNIT_SUPPRESS_BACKTRACE +# define HAVE_BUG_FUNCTION +# define __BUG_FUNC_PTR " .long %0-.\n" +# define __BUG_FUNC __func__ +#else +# define __BUG_FUNC_PTR +# define __BUG_FUNC NULL +#endif /* CONFIG_KUNIT_SUPPRESS_BACKTRACE */ + #define __EMIT_BUG(x) do { \ asm_inline volatile( \ "0: mc 0,0\n" \ @@ -17,10 +26,12 @@ ".section __bug_table,\"aw\"\n" \ "2: .long 0b-.\n" \ " .long 1b-.\n" \ - " .short %0,%1\n" \ - " .org 2b+%2\n" \ + __BUG_FUNC_PTR \ + " .short %1,%2\n" \ + " .org 2b+%3\n" \ ".previous\n" \ - : : "i" (__LINE__), \ + : : "i" (__BUG_FUNC), \ + "i" (__LINE__), \ "i" (x), \ "i" (sizeof(struct bug_entry))); \ } while (0) From patchwork Wed Apr 3 13:19:33 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Guenter Roeck X-Patchwork-Id: 13616094 Received: from mail-pf1-f179.google.com (mail-pf1-f179.google.com [209.85.210.179]) (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 CC3EB14A621; Wed, 3 Apr 2024 13:20:03 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.210.179 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1712150405; cv=none; b=PXZ5XxDUVKS0Jih4H8MAX76jKZ+GKNj7eyrkyvtjDCyLr2mNOzubHK5tKnWs3+hQi6oGQ/L3ZTOiJ/hV/vXFD1Ym3Q57/M+iKhuh/2aannb0fexnxo6rOKP0+H11UslL4sBa2tTWMIkRkojuIf7qJtYUSvQ1wZ23YXqsx/3dRcE= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1712150405; c=relaxed/simple; bh=ZgmrdIG6yAEONHV4JnGuj9TrKexMhxErWuY9DJdDsqY=; h=From:To:Cc:Subject:Date:Message-Id:In-Reply-To:References: MIME-Version; b=fYORVKN9IuboWJ+EiWAdJEq9XjKNj4IQDdZyc2DZ/zBH0aVsitBo2d+5gHvKXgHgiu/zLAYAhxpOJfXRlTomM/HjRwUKxnOHgdwtQUKjNM+fzB32K8dCgrSxkWyiW7/FwgQvnB2vcvYwpylhLIeADnxThxi9N27hlz2iGX1X3kU= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=none (p=none dis=none) header.from=roeck-us.net; spf=pass smtp.mailfrom=gmail.com; dkim=pass (2048-bit key) header.d=gmail.com header.i=@gmail.com header.b=m29Hj2RB; arc=none smtp.client-ip=209.85.210.179 Authentication-Results: smtp.subspace.kernel.org; dmarc=none (p=none dis=none) header.from=roeck-us.net 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="m29Hj2RB" Received: by mail-pf1-f179.google.com with SMTP id d2e1a72fcca58-6e6afb754fcso6031285b3a.3; Wed, 03 Apr 2024 06:20:03 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20230601; t=1712150403; x=1712755203; darn=vger.kernel.org; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:sender:from:to:cc:subject:date :message-id:reply-to; bh=acDD7oYfD3QQ420QQJRR06Qs6MsGb4dTYH+kiSwK7vU=; b=m29Hj2RBkW/LjIZdIKgQhdwrUyWs6MfyIy+8NbvE1nSCTInzwEabdKT16xdV/BwZIu gl3vysGr9JiWhHk0v6hIW8XRc0uEqo+7KRIkQGVb9Pt7iPNnLQe9cWMiC+tKMYPxNyXM aj5/jlsj1TlOlTn9fZW7yYgdenHhxeiaPbY+RT7udygA5RLYXOoD5mqHb1enZP8f13Ta DrbMSk+dLiC+Ut93SO3Xi1YcqpWFycPAixEGrJl5v3ErhZafeum9Riuxc2CcQhK9zosd T1YjFskLFdpOCp9vQN+HNhsxEnCcIG8VLeUMh8RnPRLjw5p5gXaylIpo8EUQfev+YW+R Bl8Q== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1712150403; x=1712755203; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:sender:x-gm-message-state:from :to:cc:subject:date:message-id:reply-to; bh=acDD7oYfD3QQ420QQJRR06Qs6MsGb4dTYH+kiSwK7vU=; b=lnPfYoZxhReFDxTPhOP3MjC/rf3ap5/Sd6YLCv+oV1Xy7/VtGuYiD3mlaSnsftxfyM CpAPUgKdWd++7ONLKCzra1vXY5dCJxbPi/yJ6kLGtwyVlat+KeRQCkpIkGWgembdaWlX alSA3fdGlBhpyX9KlSQb/GqgLsxAz89Wz0v2ViLvAxwOSEzOv22DYiYxbt5A/DXKIAHA /zwuxMgdNg1QzLTgNDNSDvkiukr25ztF2SHLqu9j8xc48lDcqRPF0cF34CU8q0eHqrI+ QmxsuNDVKq0Ut6rnURqJ14AVc67w5q/fjqIszU/zI5wA9BLE0fy0FOP580PFMvj3Zqtr 4zQQ== X-Forwarded-Encrypted: i=1; AJvYcCW0v8VRDulOQI2kAOvNPfart7k/B/5kru2Q1/2qviHcY5tHqSytv3wAiYqk/fk9bfilc2Wu7kETK2ILQG5QUDFQQey69uUwzLJmUmTT5yNXjaQQv2imD/MUOJ0bDDF+6oN8o2q4SVlGrmVvT+0RVi0hCnTuFGbpPPyFLeNUzldycwkty6pygocIkINcrxPnNPuNacgatUygDZSOhLNMtRkcP/Ip5tjLWDpGsrcAACU/TctlVutMkXf0J67DZT20Ft8G8f3j+2jjhLSKSUsZFhW9JVA0XnOJeYnF75Qe+3sty/C/lFUhniMs5AHQaUpc9A== X-Gm-Message-State: AOJu0Yz5n1URdzF6OmsfLAXt7ZKx78NyZr9MdTcbc4Fct0NGwXEkCsV9 p5RBxPwwB3gD81E+va5I2rwCM204cQjYlah5fGrsXlp1zUpCdawC7BXFV45i X-Google-Smtp-Source: AGHT+IH8rm/3VYkllAG+Ph/J3KijfrTneW29i0jWUjHAEJZozpI7yZ7ux/mQaa8T08FdPB1wOfWR4w== X-Received: by 2002:a05:6a00:21cf:b0:6ea:c9c3:94a5 with SMTP id t15-20020a056a0021cf00b006eac9c394a5mr19496685pfj.0.1712150402646; Wed, 03 Apr 2024 06:20:02 -0700 (PDT) Received: from server.roeck-us.net ([2600:1700:e321:62f0:329c:23ff:fee3:9d7c]) by smtp.gmail.com with ESMTPSA id u32-20020a634720000000b005e838955bc4sm11440044pga.58.2024.04.03.06.20.01 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Wed, 03 Apr 2024 06:20:02 -0700 (PDT) Sender: Guenter Roeck From: Guenter Roeck To: linux-kselftest@vger.kernel.org Cc: David Airlie , Arnd Bergmann , =?utf-8?q?Ma=C3=ADra_Canal?= , Dan Carpenter , Kees Cook , Daniel Diaz , David Gow , Arthur Grillo , Brendan Higgins , Naresh Kamboju , Maarten Lankhorst , Andrew Morton , Maxime Ripard , =?utf-8?b?VmlsbGUgU3lyasOkbMOk?= , Daniel Vetter , Thomas Zimmermann , dri-devel@lists.freedesktop.org, kunit-dev@googlegroups.com, linux-arch@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-doc@vger.kernel.org, linux-kernel@vger.kernel.org, linux-parisc@vger.kernel.org, linuxppc-dev@lists.ozlabs.org, linux-riscv@lists.infradead.org, linux-s390@vger.kernel.org, linux-sh@vger.kernel.org, loongarch@lists.linux.dev, netdev@vger.kernel.org, x86@kernel.org, Guenter Roeck , Linux Kernel Functional Testing , Yoshinori Sato , Rich Felker , John Paul Adrian Glaubitz Subject: [PATCH v3 12/15] sh: Add support for suppressing warning backtraces Date: Wed, 3 Apr 2024 06:19:33 -0700 Message-Id: <20240403131936.787234-13-linux@roeck-us.net> X-Mailer: git-send-email 2.39.2 In-Reply-To: <20240403131936.787234-1-linux@roeck-us.net> References: <20240403131936.787234-1-linux@roeck-us.net> Precedence: bulk X-Mailing-List: linux-parisc@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Add name of functions triggering warning backtraces to the __bug_table object section to enable support for suppressing WARNING backtraces. To limit image size impact, the pointer to the function name is only added to the __bug_table section if both CONFIG_KUNIT_SUPPRESS_BACKTRACE and CONFIG_DEBUG_BUGVERBOSE are enabled. Otherwise, the __func__ assembly parameter is replaced with a (dummy) NULL parameter to avoid an image size increase due to unused __func__ entries (this is necessary because __func__ is not a define but a virtual variable). Tested-by: Linux Kernel Functional Testing Acked-by: Dan Carpenter Cc: Yoshinori Sato Cc: Rich Felker Cc: John Paul Adrian Glaubitz Signed-off-by: Guenter Roeck --- v2: - Rebased to v6.9-rc1 - Added Tested-by:, Acked-by:, and Reviewed-by: tags - Introduced KUNIT_SUPPRESS_BACKTRACE configuration option v3: - Rebased to v6.9-rc2 arch/sh/include/asm/bug.h | 26 ++++++++++++++++++++++---- 1 file changed, 22 insertions(+), 4 deletions(-) diff --git a/arch/sh/include/asm/bug.h b/arch/sh/include/asm/bug.h index 05a485c4fabc..470ce6567d20 100644 --- a/arch/sh/include/asm/bug.h +++ b/arch/sh/include/asm/bug.h @@ -24,21 +24,36 @@ * The offending file and line are encoded in the __bug_table section. */ #ifdef CONFIG_DEBUG_BUGVERBOSE + +#ifdef CONFIG_KUNIT_SUPPRESS_BACKTRACE +# define HAVE_BUG_FUNCTION +# define __BUG_FUNC_PTR "\t.long %O2\n" +#else +# define __BUG_FUNC_PTR +#endif /* CONFIG_KUNIT_SUPPRESS_BACKTRACE */ + #define _EMIT_BUG_ENTRY \ "\t.pushsection __bug_table,\"aw\"\n" \ "2:\t.long 1b, %O1\n" \ - "\t.short %O2, %O3\n" \ - "\t.org 2b+%O4\n" \ + __BUG_FUNC_PTR \ + "\t.short %O3, %O4\n" \ + "\t.org 2b+%O5\n" \ "\t.popsection\n" #else #define _EMIT_BUG_ENTRY \ "\t.pushsection __bug_table,\"aw\"\n" \ "2:\t.long 1b\n" \ - "\t.short %O3\n" \ - "\t.org 2b+%O4\n" \ + "\t.short %O4\n" \ + "\t.org 2b+%O5\n" \ "\t.popsection\n" #endif +#ifdef HAVE_BUG_FUNCTION +# define __BUG_FUNC __func__ +#else +# define __BUG_FUNC NULL +#endif + #define BUG() \ do { \ __asm__ __volatile__ ( \ @@ -47,6 +62,7 @@ do { \ : \ : "n" (TRAPA_BUG_OPCODE), \ "i" (__FILE__), \ + "i" (__BUG_FUNC), \ "i" (__LINE__), "i" (0), \ "i" (sizeof(struct bug_entry))); \ unreachable(); \ @@ -60,6 +76,7 @@ do { \ : \ : "n" (TRAPA_BUG_OPCODE), \ "i" (__FILE__), \ + "i" (__BUG_FUNC), \ "i" (__LINE__), \ "i" (BUGFLAG_WARNING|(flags)), \ "i" (sizeof(struct bug_entry))); \ @@ -85,6 +102,7 @@ do { \ : \ : "n" (TRAPA_BUG_OPCODE), \ "i" (__FILE__), \ + "i" (__BUG_FUNC), \ "i" (__LINE__), \ "i" (BUGFLAG_UNWINDER), \ "i" (sizeof(struct bug_entry))); \ From patchwork Wed Apr 3 13:19:34 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Guenter Roeck X-Patchwork-Id: 13616095 Received: from mail-pl1-f174.google.com (mail-pl1-f174.google.com [209.85.214.174]) (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 ABD0B14C5A5; Wed, 3 Apr 2024 13:20:05 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.214.174 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1712150407; cv=none; b=MeT/o84RWdJoTqEV2gUxqDKVw93Ni5RGkVIU2ecZoB5IAePeKJh6Y9BAOen43T76FjvIuUSJBW5mp9HxFkOyjOG1Ct2NzUIB91U1OMCBiXK0T+xt/6J3bOCPtyK0NDjTWnE/bwj3ok0NgiGSUG90pEp0/luKUS+ARYNc+DSmTjM= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1712150407; c=relaxed/simple; bh=RCCT/5TpvcROnLQfnurJQ3QCbHt8dW3ImZclXmeu/JA=; h=From:To:Cc:Subject:Date:Message-Id:In-Reply-To:References: MIME-Version; b=WBMXZRBhiy/BfGVyQWeHYIEIz7OIo/ZMjHWplEutLCvQZ+SaHo0q69pfO2WPqGnpeIaRaUNdo0qPPe0vXTfJgWDf9YmsDyQLilC47jL1NiVhnc3s46d3yJ9Kx6ThzHeYMSL1BmJ8QL7saT54VvHnYZMyc6GNo+WDoDGRRqyAVEI= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=none (p=none dis=none) header.from=roeck-us.net; spf=pass smtp.mailfrom=gmail.com; dkim=pass (2048-bit key) header.d=gmail.com header.i=@gmail.com header.b=Lgta/Mnr; arc=none smtp.client-ip=209.85.214.174 Authentication-Results: smtp.subspace.kernel.org; dmarc=none (p=none dis=none) header.from=roeck-us.net 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="Lgta/Mnr" Received: by mail-pl1-f174.google.com with SMTP id d9443c01a7336-1e0d82c529fso54378375ad.2; Wed, 03 Apr 2024 06:20:05 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20230601; t=1712150404; x=1712755204; darn=vger.kernel.org; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:sender:from:to:cc:subject:date :message-id:reply-to; bh=cRPOdz6AnxublM7n3KmjYybYhLan42asyWOmMDzsw+o=; b=Lgta/MnrcbxSw3fkbvVuGZUTbk39aUBRkqWBoUWrGR6J+3fjwSpKBM9OP51TirSkGq qLc4vwyj5v2FTOozrHgc+rKL3oWaXNcMns98P79qHtlvXMLfmYao9EIZA8uZvkeygY2X O5Vkj6qjDkGLRfJvijsYx9pV6OjTAVCRyH/vw+4ZMCI0hk+SpHsr+eTH97h95nCoHOrS WXNGvesL4s3+iwLMAwRj2M3QBCTHQlBDposxFZv6lXwwRxdrVELZX/XiR+0r4h31yKfM sHFHqkPIYpjPkkAbM41ep5fqd8GQD7P+pKFoEKqtGPjsyspmWIMqOivFDCNDfQKGSY23 5LRw== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1712150404; x=1712755204; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:sender:x-gm-message-state:from :to:cc:subject:date:message-id:reply-to; bh=cRPOdz6AnxublM7n3KmjYybYhLan42asyWOmMDzsw+o=; b=RSII/5FNt1RLLzigAaAx/rnhbe/k1S3jZDf3w6fxg269S6D3yyL8Dc2lfYULADGyyL QhDR1EJ2TWuLpFTaNbM6eIV6RQBWOJRQXekMqB31wHnDlpu+Rl2FYkzcUKXcmMp98SPG FXlytr73QdLOJlXfX3gfJzsE/0uz7ble2Fl3c58FIJWw3oiHQmpRQ2uiIZyxVlWJ5/Nu 2+rHYldqGX950kCAyD2nhNAd9fAfoz5YMCE48rOyVeROjg5FsKPr8nPujOcUJ7vLtrub ZL8KqkrtDIHZES1+kFzreT9UV5TMoERatUJze81KmZ/AbIg3yqtKa3VhsCTFjfvfQ5+h yMvg== X-Forwarded-Encrypted: i=1; AJvYcCXgmMfwNlPO1DcDHf+y+1qiRXSnS+8Csg4Egd23lNllKgGIlhsTYk9DVZStjf2ySuxHys5Jdr5Y6qQwsRFZszFXXHKwF1DZH8JnDriANEFnM+lpliJsne8srfDauP9YZyB5uxzMpjszyuwQ01JnXjdfPeQN7xlQ196WNNUpOIvHbn+LOgfx+WcexM3WNEnCT1go6J654vhFuSu45Mwl64knK3fHH6/R66HQkWFIbz29/UJ4YCWEmVh4qiBhe9t7utqElhupx0YitOKdF6nBIsRseHVkDQYQF7uQ+cuRXK5MpUXcEIHIjIDeoOI59glm3g== X-Gm-Message-State: AOJu0YyRXteQAytxeu5ifnfa1VUdh3TD3oEPjJ/GMT+uFxPrgGqf8z2r Wakk/c1bmKjtIPD+NWfN5hItLQJdDJH+x/11mt3cAevOFB2akIIwtEB9b+CM X-Google-Smtp-Source: AGHT+IGx8oRVikcJmoZrmV6I1PpggSRavr/G5SNCkYR+IkJlaqrk2wHgg+ZazQ8Nymmw82Dh4v/u5A== X-Received: by 2002:a17:903:32cc:b0:1e2:2d0c:fef0 with SMTP id i12-20020a17090332cc00b001e22d0cfef0mr17310539plr.48.1712150404272; Wed, 03 Apr 2024 06:20:04 -0700 (PDT) Received: from server.roeck-us.net ([2600:1700:e321:62f0:329c:23ff:fee3:9d7c]) by smtp.gmail.com with ESMTPSA id d5-20020a170903230500b001dd4d0082c8sm3855527plh.216.2024.04.03.06.20.03 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Wed, 03 Apr 2024 06:20:03 -0700 (PDT) Sender: Guenter Roeck From: Guenter Roeck To: linux-kselftest@vger.kernel.org Cc: David Airlie , Arnd Bergmann , =?utf-8?q?Ma=C3=ADra_Canal?= , Dan Carpenter , Kees Cook , Daniel Diaz , David Gow , Arthur Grillo , Brendan Higgins , Naresh Kamboju , Maarten Lankhorst , Andrew Morton , Maxime Ripard , =?utf-8?b?VmlsbGUgU3lyasOkbMOk?= , Daniel Vetter , Thomas Zimmermann , dri-devel@lists.freedesktop.org, kunit-dev@googlegroups.com, linux-arch@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-doc@vger.kernel.org, linux-kernel@vger.kernel.org, linux-parisc@vger.kernel.org, linuxppc-dev@lists.ozlabs.org, linux-riscv@lists.infradead.org, linux-s390@vger.kernel.org, linux-sh@vger.kernel.org, loongarch@lists.linux.dev, netdev@vger.kernel.org, x86@kernel.org, Guenter Roeck , Simon Horman , Yoshinori Sato , Rich Felker , John Paul Adrian Glaubitz Subject: [PATCH v3 13/15] sh: Move defines needed for suppressing warning backtraces Date: Wed, 3 Apr 2024 06:19:34 -0700 Message-Id: <20240403131936.787234-14-linux@roeck-us.net> X-Mailer: git-send-email 2.39.2 In-Reply-To: <20240403131936.787234-1-linux@roeck-us.net> References: <20240403131936.787234-1-linux@roeck-us.net> Precedence: bulk X-Mailing-List: linux-parisc@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Declaring the defines needed for suppressing warning inside '#ifdef CONFIG_DEBUG_BUGVERBOSE' results in a kerneldoc warning. .../bug.h:29: warning: expecting prototype for _EMIT_BUG_ENTRY(). Prototype was for HAVE_BUG_FUNCTION() instead Move the defines above the kerneldoc entry for _EMIT_BUG_ENTRY to make kerneldoc happy. Reported-by: Simon Horman Cc: Simon Horman Cc: Yoshinori Sato Cc: Rich Felker Cc: John Paul Adrian Glaubitz Signed-off-by: Guenter Roeck --- v3: Added patch. Possibly squash into previous patch. arch/sh/include/asm/bug.h | 16 +++++++++------- 1 file changed, 9 insertions(+), 7 deletions(-) diff --git a/arch/sh/include/asm/bug.h b/arch/sh/include/asm/bug.h index 470ce6567d20..bf4947d51d69 100644 --- a/arch/sh/include/asm/bug.h +++ b/arch/sh/include/asm/bug.h @@ -11,6 +11,15 @@ #define HAVE_ARCH_BUG #define HAVE_ARCH_WARN_ON +#ifdef CONFIG_DEBUG_BUGVERBOSE +#ifdef CONFIG_KUNIT_SUPPRESS_BACKTRACE +# define HAVE_BUG_FUNCTION +# define __BUG_FUNC_PTR "\t.long %O2\n" +#else +# define __BUG_FUNC_PTR +#endif /* CONFIG_KUNIT_SUPPRESS_BACKTRACE */ +#endif /* CONFIG_DEBUG_BUGVERBOSE */ + /** * _EMIT_BUG_ENTRY * %1 - __FILE__ @@ -25,13 +34,6 @@ */ #ifdef CONFIG_DEBUG_BUGVERBOSE -#ifdef CONFIG_KUNIT_SUPPRESS_BACKTRACE -# define HAVE_BUG_FUNCTION -# define __BUG_FUNC_PTR "\t.long %O2\n" -#else -# define __BUG_FUNC_PTR -#endif /* CONFIG_KUNIT_SUPPRESS_BACKTRACE */ - #define _EMIT_BUG_ENTRY \ "\t.pushsection __bug_table,\"aw\"\n" \ "2:\t.long 1b, %O1\n" \ From patchwork Wed Apr 3 13:19:35 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Guenter Roeck X-Patchwork-Id: 13616096 Received: from mail-pl1-f174.google.com (mail-pl1-f174.google.com [209.85.214.174]) (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 584C614D425; Wed, 3 Apr 2024 13:20:07 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.214.174 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1712150409; cv=none; b=ZSNTEXUCuxxy7oF8Fy1Q7fE9QcaMo+IVBXar/4fF4CArBLGiRQvlKpNp0aWMd/Csx89/x6xvXTxZMvUiBT25UcQbwNRkqCkba6+ckomyjSYllW1H7TmIVISM5guPOv3zzFU6iPfNmjX0jnCx8IdIC/F2Kla58Q9k2pJVLVvkWSQ= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1712150409; c=relaxed/simple; bh=6CYnXopnOEFDbmnJvQptcozsBT0uZcC6Gw55E5+uo5s=; h=From:To:Cc:Subject:Date:Message-Id:In-Reply-To:References: MIME-Version; b=QOLjs5xqP0Lq4kMpuNkSJYySQVWzr5zzV3sv7058Q+7Ga+Gps07olqeswG9/IZQnQTNlVNdSft+zPKaSsejyEj4vVMnkw+AOYSFtxHo/SG6cbuJTqTQJp7mNwCF8zoRseMJ2Y9Rb74h72eGSkQ05BshZkAQHf3z/RvZrpWpbG00= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=none (p=none dis=none) header.from=roeck-us.net; spf=pass smtp.mailfrom=gmail.com; dkim=pass (2048-bit key) header.d=gmail.com header.i=@gmail.com header.b=CsD0oyiP; arc=none smtp.client-ip=209.85.214.174 Authentication-Results: smtp.subspace.kernel.org; dmarc=none (p=none dis=none) header.from=roeck-us.net 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="CsD0oyiP" Received: by mail-pl1-f174.google.com with SMTP id d9443c01a7336-1e27e174ccbso10908035ad.2; Wed, 03 Apr 2024 06:20:07 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20230601; t=1712150406; x=1712755206; darn=vger.kernel.org; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:sender:from:to:cc:subject:date :message-id:reply-to; bh=ODnUVSnKJhDEm1BurB+AUz+TF6tuatLZNT+jGpCl49o=; b=CsD0oyiP2JQ991rgfHqWBL1D9T7YSZr45F+iyC38jltBcMOIX48ki8j60N8ck+XLh3 Ajko6sJcpH4IaghYFZjY8Bgd7/DJdFfA5aUf2jKuQKc8rjsSkor3Vw4PbM7VIXNG90HG 7vlFCvIQ8855G2VRAmoSSB1h+DXvRzhHRmefZt3gWrPbNc1WUn+eH/UVCy7UuMvVIOXi YXt9sTOnbjk18gCl4NcZYnWJd6auQAfQWsn3CGWYnWeXo0JD1lU4vRcHERVtM+MS14pC fD7SGXP7k7pOrKbFV6RdTfYfSLYm9JN1nAk1EyheE6tui5H05PgZF1bgGW4Rn5A4CaR4 wxeg== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1712150406; x=1712755206; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:sender:x-gm-message-state:from :to:cc:subject:date:message-id:reply-to; bh=ODnUVSnKJhDEm1BurB+AUz+TF6tuatLZNT+jGpCl49o=; b=iGisyINYQyjneZ5zL4zNz7RK0X9xlLzuyv/6hjCLSGD+ZIuIrIrjtMp4AvnkiA+DpO RvegreJnmCjddB6QQHh4cHPiZEmqb+IoVAqvytig+/LTjLl5+emu/bSpHIoX/vGkY355 luBx0lPS9DmPOG4cLwszX0vQkdTOiJ06xDLWuAKunXiBfQJwmgA4U2NgxG1AguEaiyPW ZoXqK1aQ1l39y6hj4ezwyl0/QGP10n6Bk6Z/HrSp2zNokv9th4lZM8aJe242lt9BcCjX 4+5q+I209c2hCnbx7KHgdvsScnceh3y3EZFt6jWPxTzgH4qb6AfEpSX2iDlhrnJOGYzy nImw== X-Forwarded-Encrypted: i=1; AJvYcCWgvdAb3hjjj5r8idm5dzpJwQTVDmfhrWN3205eQPGJl9usESWnVQXstZQAsOJGXhshnL6qgxHze5JzJbnpscS/wyCu+J4tkH0Au/heFKlcrnkwk5IlME3gk5PrMqzGfociVuRfpGIJMFnljG0dmUVlCPOmP0UUsPfJptqBhpqRL5Jt+1pTlOonpL54D1rBUO4DtFBKwDKWnpNyoWMFNFCnZUQoqrCVokxexGrOiVTWnp5/IN4Vl2b+n6/YO3Db9jFUJ6CmXdNM6H9j7a0cqO+MbQkpI3GXkB/2huUyd1GERzMUtoQ5wjFr5Q7C5RZlHQ== X-Gm-Message-State: AOJu0YyoB8/uCRw8BDXx6zKklfgyB6/G0Nsd0Bxc9KgP0mj3x5CMwxAt HHiJd8wxtycBWBgJz9xCrtdhw9FuEDEK1/gv6EfN5n8olE4oYnDq5umPHZBt X-Google-Smtp-Source: AGHT+IFJ9xVFhcxKPjkQ9awCqlJIsW3wvRmyEJkLnkWMs/f98CPvZeN33nEjiQcGmSbiBbYrqVdc1g== X-Received: by 2002:a17:902:ccc1:b0:1e2:3d61:e266 with SMTP id z1-20020a170902ccc100b001e23d61e266mr18724864ple.49.1712150405920; Wed, 03 Apr 2024 06:20:05 -0700 (PDT) Received: from server.roeck-us.net ([2600:1700:e321:62f0:329c:23ff:fee3:9d7c]) by smtp.gmail.com with ESMTPSA id b1-20020a170903228100b001db717d2dbbsm13207508plh.210.2024.04.03.06.20.05 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Wed, 03 Apr 2024 06:20:05 -0700 (PDT) Sender: Guenter Roeck From: Guenter Roeck To: linux-kselftest@vger.kernel.org Cc: David Airlie , Arnd Bergmann , =?utf-8?q?Ma=C3=ADra_Canal?= , Dan Carpenter , Kees Cook , Daniel Diaz , David Gow , Arthur Grillo , Brendan Higgins , Naresh Kamboju , Maarten Lankhorst , Andrew Morton , Maxime Ripard , =?utf-8?b?VmlsbGUgU3lyasOkbMOk?= , Daniel Vetter , Thomas Zimmermann , dri-devel@lists.freedesktop.org, kunit-dev@googlegroups.com, linux-arch@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-doc@vger.kernel.org, linux-kernel@vger.kernel.org, linux-parisc@vger.kernel.org, linuxppc-dev@lists.ozlabs.org, linux-riscv@lists.infradead.org, linux-s390@vger.kernel.org, linux-sh@vger.kernel.org, loongarch@lists.linux.dev, netdev@vger.kernel.org, x86@kernel.org, Guenter Roeck , Linux Kernel Functional Testing , Paul Walmsley , Palmer Dabbelt , Albert Ou Subject: [PATCH v3 14/15] riscv: Add support for suppressing warning backtraces Date: Wed, 3 Apr 2024 06:19:35 -0700 Message-Id: <20240403131936.787234-15-linux@roeck-us.net> X-Mailer: git-send-email 2.39.2 In-Reply-To: <20240403131936.787234-1-linux@roeck-us.net> References: <20240403131936.787234-1-linux@roeck-us.net> Precedence: bulk X-Mailing-List: linux-parisc@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Add name of functions triggering warning backtraces to the __bug_table object section to enable support for suppressing WARNING backtraces. To limit image size impact, the pointer to the function name is only added to the __bug_table section if both CONFIG_KUNIT_SUPPRESS_BACKTRACE and CONFIG_DEBUG_BUGVERBOSE are enabled. Otherwise, the __func__ assembly parameter is replaced with a (dummy) NULL parameter to avoid an image size increase due to unused __func__ entries (this is necessary because __func__ is not a define but a virtual variable). To simplify the implementation, unify the __BUG_ENTRY_ADDR and __BUG_ENTRY_FILE macros into a single macro named __BUG_REL() which takes the address, file, or function reference as parameter. Tested-by: Linux Kernel Functional Testing Acked-by: Dan Carpenter Cc: Paul Walmsley Cc: Palmer Dabbelt Cc: Albert Ou Signed-off-by: Guenter Roeck Reviewed-by: Charlie Jenkins --- v2: - Rebased to v6.9-rc1 - Added Tested-by:, Acked-by:, and Reviewed-by: tags - Introduced KUNIT_SUPPRESS_BACKTRACE configuration option v3: - Rebased to v6.9-rc2 arch/riscv/include/asm/bug.h | 38 ++++++++++++++++++++++++------------ 1 file changed, 26 insertions(+), 12 deletions(-) diff --git a/arch/riscv/include/asm/bug.h b/arch/riscv/include/asm/bug.h index 1aaea81fb141..79f360af4ad8 100644 --- a/arch/riscv/include/asm/bug.h +++ b/arch/riscv/include/asm/bug.h @@ -30,26 +30,39 @@ typedef u32 bug_insn_t; #ifdef CONFIG_GENERIC_BUG_RELATIVE_POINTERS -#define __BUG_ENTRY_ADDR RISCV_INT " 1b - ." -#define __BUG_ENTRY_FILE RISCV_INT " %0 - ." +#define __BUG_REL(val) RISCV_INT " " __stringify(val) " - ." #else -#define __BUG_ENTRY_ADDR RISCV_PTR " 1b" -#define __BUG_ENTRY_FILE RISCV_PTR " %0" +#define __BUG_REL(val) RISCV_PTR " " __stringify(val) #endif #ifdef CONFIG_DEBUG_BUGVERBOSE + +#ifdef CONFIG_KUNIT_SUPPRESS_BACKTRACE +# define HAVE_BUG_FUNCTION +# define __BUG_FUNC_PTR __BUG_REL(%1) +#else +# define __BUG_FUNC_PTR +#endif /* CONFIG_KUNIT_SUPPRESS_BACKTRACE */ + #define __BUG_ENTRY \ - __BUG_ENTRY_ADDR "\n\t" \ - __BUG_ENTRY_FILE "\n\t" \ - RISCV_SHORT " %1\n\t" \ - RISCV_SHORT " %2" + __BUG_REL(1b) "\n\t" \ + __BUG_REL(%0) "\n\t" \ + __BUG_FUNC_PTR "\n\t" \ + RISCV_SHORT " %2\n\t" \ + RISCV_SHORT " %3" #else #define __BUG_ENTRY \ - __BUG_ENTRY_ADDR "\n\t" \ - RISCV_SHORT " %2" + __BUG_REL(1b) "\n\t" \ + RISCV_SHORT " %3" #endif #ifdef CONFIG_GENERIC_BUG +#ifdef HAVE_BUG_FUNCTION +# define __BUG_FUNC __func__ +#else +# define __BUG_FUNC NULL +#endif + #define __BUG_FLAGS(flags) \ do { \ __asm__ __volatile__ ( \ @@ -58,10 +71,11 @@ do { \ ".pushsection __bug_table,\"aw\"\n\t" \ "2:\n\t" \ __BUG_ENTRY "\n\t" \ - ".org 2b + %3\n\t" \ + ".org 2b + %4\n\t" \ ".popsection" \ : \ - : "i" (__FILE__), "i" (__LINE__), \ + : "i" (__FILE__), "i" (__BUG_FUNC), \ + "i" (__LINE__), \ "i" (flags), \ "i" (sizeof(struct bug_entry))); \ } while (0) From patchwork Wed Apr 3 13:19:36 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Guenter Roeck X-Patchwork-Id: 13616097 Received: from mail-pl1-f169.google.com (mail-pl1-f169.google.com [209.85.214.169]) (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 3310914E2DA; Wed, 3 Apr 2024 13:20:08 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.214.169 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1712150410; cv=none; b=QFLqO2hJQUpl+LwXu2UUjB7vmb63QHXmDLuwEazRtrvHhzS5UlK6ZDHzqnO82sBoUv848Fy5MTIjX9GG+2D+dyN3Ow8o9ll9falBLrwvJDWJosChXujMvgJ72SyQYmg2OYmTpXjofY7GRs1/dPQLrL1EROn815x7vZoJAl651+0= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1712150410; c=relaxed/simple; bh=fEOGTP44ht/ZhSieHBOxh1TKRJM2QPU3A8FjedSkZo4=; h=From:To:Cc:Subject:Date:Message-Id:In-Reply-To:References: MIME-Version; b=cAs8z/4I1YJe8czr0u3qB5xokbINSu9uNTOkIxuWnUuWNpAZVEDT2/f3F/2irR0cpXwV+8K6isbO1kTk9m6nEJhAm1OrQgRRC7KtU/jMMFGy6GMWbBN4rTLI8GcVr3P+DtkOpEoFfNostj/UG+DpckL0dBTBLh1wnwiSEn5Ugyc= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=none (p=none dis=none) header.from=roeck-us.net; spf=pass smtp.mailfrom=gmail.com; dkim=pass (2048-bit key) header.d=gmail.com header.i=@gmail.com header.b=LMfafsMs; arc=none smtp.client-ip=209.85.214.169 Authentication-Results: smtp.subspace.kernel.org; dmarc=none (p=none dis=none) header.from=roeck-us.net 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="LMfafsMs" Received: by mail-pl1-f169.google.com with SMTP id d9443c01a7336-1e27c303573so13523555ad.3; Wed, 03 Apr 2024 06:20:08 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20230601; t=1712150407; x=1712755207; darn=vger.kernel.org; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:sender:from:to:cc:subject:date :message-id:reply-to; bh=Wn5Y6haDMX+KFeDZiuG3bLreTNkdvF0hb2IVOihuo/Q=; b=LMfafsMsnVCLJvAyLc/fI3aGiQpHUzPkwdjpXDSRK7GwuJEP2pChmNhUwLZIgdgiqq t35PWXnlEeCdPi/VuDeOWkuhtCeDqKwA96QB4wLtqb4Igqs7jlFs8aJTkZU45PQVTWA8 YA+KioJca5uZoP8ZXtbkS8iV0x4cc9vurQkXAol3dURtE0H3Z+7uarf5MnE7yb6aNKHJ mZNFuVX5dv74BL6eL4VDgTXJIP7b3bZLPbl1OxsngNJqRuqBqy6V8SqGKVITMc0im8oJ OG5XSTUJvQN1f71PEsAIiUYutsr6WFqx6ElCWqw+7vXRa8CVk0YIs/xF5eUKCNNO9xtg WY6w== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1712150407; x=1712755207; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:sender:x-gm-message-state:from :to:cc:subject:date:message-id:reply-to; bh=Wn5Y6haDMX+KFeDZiuG3bLreTNkdvF0hb2IVOihuo/Q=; b=WNjuHhgRDUG+Qy02C4q4AKg3PfgBT67BBoROAaW85+yJL6pBNDzqPAevHnlKbUwBuL Rzh6iADH5WMdVDdqfjVJ3BTT6mLfyDh6vf5Yy9pUQX0X2gn4Gnt+3TDAFMmWwDsUiRsm n0K5ZGzzRcg3g/ZA7pFY/AJxlYAbDYQYtR/mOJAZqeWte71vRzGGBvVrs7Sby8Z4HYhv 0W3FEOPdgw4irHiFRpkvNkcynbnc1t2ClbWUcXaW6/vQIDQ+2tIBTOLLfNzobewRfZT6 gkfznRTr38ptxG4Hxte3Uql40CepZ/nKpYHM/NngcEq3fAaREv3HL6V0MGLRxw46HjRQ zIJQ== X-Forwarded-Encrypted: i=1; AJvYcCWDSjDTqC33iH8rfS5sgmZppAqUKyzdGMI03wGBl11g2DXQyYUkXlACnm0JTJ7uvh1BiddRUvpryx7Lt6HXuXsh3LmnohwJSXNJ9rzvh25+DuJzNSIs/TA4VvNICF0BPbJP+VOzKP8wiY3qJmz2pMqT7xkFxkRegmIyJSp+aD1nTy8yPUV2QfwvqpAMNLWSYJS1b7fitx+4xsId2vONHdVxSFF5gIT+ROSqkUspXRgTMibZTIwu/Y+oIaPtoL1dgithT31ssk55vSXf1SkYtmvbzsKuMQ3GrZNRFV8KnKiF4kfOBU3vYfuPCIGiicJ2lg== X-Gm-Message-State: AOJu0Yww/iQKLc7NNFNMVdA6G4l+fOXDc7xpi7QwbWj/JsdV9ZtpvSl7 6qsZjKukWujUXCW8YMxqM8oSd/+50FLeBksQM4vi8P2K6fuAv2ZNv0RWrMgh X-Google-Smtp-Source: AGHT+IHWmvXbtJ9fAm6MAldmvpyAC7gyMYuUNuumU3VUQ5OUfg6iZFWTqXY0l/Y7ponpfkrN4lhaag== X-Received: by 2002:a17:902:e74f:b0:1e0:d630:f054 with SMTP id p15-20020a170902e74f00b001e0d630f054mr18958233plf.7.1712150407580; Wed, 03 Apr 2024 06:20:07 -0700 (PDT) Received: from server.roeck-us.net ([2600:1700:e321:62f0:329c:23ff:fee3:9d7c]) by smtp.gmail.com with ESMTPSA id k12-20020a170902c40c00b001e0b3a87dbbsm1705074plk.177.2024.04.03.06.20.06 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Wed, 03 Apr 2024 06:20:07 -0700 (PDT) Sender: Guenter Roeck From: Guenter Roeck To: linux-kselftest@vger.kernel.org Cc: David Airlie , Arnd Bergmann , =?utf-8?q?Ma=C3=ADra_Canal?= , Dan Carpenter , Kees Cook , Daniel Diaz , David Gow , Arthur Grillo , Brendan Higgins , Naresh Kamboju , Maarten Lankhorst , Andrew Morton , Maxime Ripard , =?utf-8?b?VmlsbGUgU3lyasOkbMOk?= , Daniel Vetter , Thomas Zimmermann , dri-devel@lists.freedesktop.org, kunit-dev@googlegroups.com, linux-arch@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-doc@vger.kernel.org, linux-kernel@vger.kernel.org, linux-parisc@vger.kernel.org, linuxppc-dev@lists.ozlabs.org, linux-riscv@lists.infradead.org, linux-s390@vger.kernel.org, linux-sh@vger.kernel.org, loongarch@lists.linux.dev, netdev@vger.kernel.org, x86@kernel.org, Guenter Roeck , Linux Kernel Functional Testing , Michael Ellerman Subject: [PATCH v3 15/15] powerpc: Add support for suppressing warning backtraces Date: Wed, 3 Apr 2024 06:19:36 -0700 Message-Id: <20240403131936.787234-16-linux@roeck-us.net> X-Mailer: git-send-email 2.39.2 In-Reply-To: <20240403131936.787234-1-linux@roeck-us.net> References: <20240403131936.787234-1-linux@roeck-us.net> Precedence: bulk X-Mailing-List: linux-parisc@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Add name of functions triggering warning backtraces to the __bug_table object section to enable support for suppressing WARNING backtraces. To limit image size impact, the pointer to the function name is only added to the __bug_table section if both CONFIG_KUNIT_SUPPRESS_BACKTRACE and CONFIG_DEBUG_BUGVERBOSE are enabled. Otherwise, the __func__ assembly parameter is replaced with a (dummy) NULL parameter to avoid an image size increase due to unused __func__ entries (this is necessary because __func__ is not a define but a virtual variable). Tested-by: Linux Kernel Functional Testing Acked-by: Dan Carpenter Cc: Michael Ellerman Signed-off-by: Guenter Roeck Acked-by: Michael Ellerman (powerpc) --- v2: - Rebased to v6.9-rc1 - Added Tested-by:, Acked-by:, and Reviewed-by: tags - Introduced KUNIT_SUPPRESS_BACKTRACE configuration option v3: - Rebased to v6.9-rc2 arch/powerpc/include/asm/bug.h | 37 +++++++++++++++++++++++++--------- 1 file changed, 28 insertions(+), 9 deletions(-) diff --git a/arch/powerpc/include/asm/bug.h b/arch/powerpc/include/asm/bug.h index 1db485aacbd9..5b06745d20aa 100644 --- a/arch/powerpc/include/asm/bug.h +++ b/arch/powerpc/include/asm/bug.h @@ -14,6 +14,9 @@ .section __bug_table,"aw" 5001: .4byte \addr - . .4byte 5002f - . +#ifdef CONFIG_KUNIT_SUPPRESS_BACKTRACE + .4byte 0 +#endif .short \line, \flags .org 5001b+BUG_ENTRY_SIZE .previous @@ -32,30 +35,46 @@ #endif /* verbose */ #else /* !__ASSEMBLY__ */ -/* _EMIT_BUG_ENTRY expects args %0,%1,%2,%3 to be FILE, LINE, flags and - sizeof(struct bug_entry), respectively */ +/* _EMIT_BUG_ENTRY expects args %0,%1,%2,%3,%4 to be FILE, __func__, LINE, flags + and sizeof(struct bug_entry), respectively */ #ifdef CONFIG_DEBUG_BUGVERBOSE + +#ifdef CONFIG_KUNIT_SUPPRESS_BACKTRACE +# define HAVE_BUG_FUNCTION +# define __BUG_FUNC_PTR " .4byte %1 - .\n" +#else +# define __BUG_FUNC_PTR +#endif /* CONFIG_KUNIT_SUPPRESS_BACKTRACE */ + #define _EMIT_BUG_ENTRY \ ".section __bug_table,\"aw\"\n" \ "2: .4byte 1b - .\n" \ " .4byte %0 - .\n" \ - " .short %1, %2\n" \ - ".org 2b+%3\n" \ + __BUG_FUNC_PTR \ + " .short %2, %3\n" \ + ".org 2b+%4\n" \ ".previous\n" #else #define _EMIT_BUG_ENTRY \ ".section __bug_table,\"aw\"\n" \ "2: .4byte 1b - .\n" \ - " .short %2\n" \ - ".org 2b+%3\n" \ + " .short %3\n" \ + ".org 2b+%4\n" \ ".previous\n" #endif +#ifdef HAVE_BUG_FUNCTION +# define __BUG_FUNC __func__ +#else +# define __BUG_FUNC NULL +#endif + #define BUG_ENTRY(insn, flags, ...) \ __asm__ __volatile__( \ "1: " insn "\n" \ _EMIT_BUG_ENTRY \ - : : "i" (__FILE__), "i" (__LINE__), \ + : : "i" (__FILE__), "i" (__BUG_FUNC), \ + "i" (__LINE__), \ "i" (flags), \ "i" (sizeof(struct bug_entry)), \ ##__VA_ARGS__) @@ -80,7 +99,7 @@ if (x) \ BUG(); \ } else { \ - BUG_ENTRY(PPC_TLNEI " %4, 0", 0, "r" ((__force long)(x))); \ + BUG_ENTRY(PPC_TLNEI " %5, 0", 0, "r" ((__force long)(x))); \ } \ } while (0) @@ -90,7 +109,7 @@ if (__ret_warn_on) \ __WARN(); \ } else { \ - BUG_ENTRY(PPC_TLNEI " %4, 0", \ + BUG_ENTRY(PPC_TLNEI " %5, 0", \ BUGFLAG_WARNING | BUGFLAG_TAINT(TAINT_WARN), \ "r" (__ret_warn_on)); \ } \