From: Guenter Roeck <linux@roeck-us.net>
To: linux-kselftest@vger.kernel.org
Cc: loongarch@lists.linux.dev, linux-doc@vger.kernel.org,
dri-devel@lists.freedesktop.org,
"Brendan Higgins" <brendan.higgins@linux.dev>,
linux-riscv@lists.infradead.org,
"David Airlie" <airlied@gmail.com>,
"Arthur Grillo" <arthurgrillo@riseup.net>,
"Ville Syrjälä" <ville.syrjala@linux.intel.com>,
linux-arch@vger.kernel.org, linux-s390@vger.kernel.org,
"Daniel Diaz" <daniel.diaz@linaro.org>,
linux-sh@vger.kernel.org,
"Naresh Kamboju" <naresh.kamboju@linaro.org>,
"Maíra Canal" <mcanal@igalia.com>,
"Dan Carpenter" <dan.carpenter@linaro.org>,
"Linux Kernel Functional Testing" <lkft@linaro.org>,
"Guenter Roeck" <linux@roeck-us.net>,
"Kees Cook" <keescook@chromium.org>,
"Arnd Bergmann" <arnd@arndb.de>,
"Maarten Lankhorst" <maarten.lankhorst@linux.intel.com>,
"Maxime Ripard" <mripard@kernel.org>,
"David Gow" <davidgow@google.com>,
"Daniel Vetter" <daniel@ffwll.ch>,
linux-arm-kernel@lists.infradead.org, kunit-dev@googlegroups.com,
linux-parisc@vger.kernel.org, netdev@vger.kernel.org,
linux-kernel@vger.kernel.org,
"Thomas Zimmermann" <tzimmermann@suse.de>,
"Andrew Morton" <akpm@linux-foundation.org>,
linuxppc-dev@lists.ozlabs.org
Subject: [PATCH v2 08/14] arm64: Add support for suppressing warning backtraces
Date: Mon, 25 Mar 2024 10:52:42 -0700 [thread overview]
Message-ID: <20240325175248.1499046-9-linux@roeck-us.net> (raw)
In-Reply-To: <20240325175248.1499046-1-linux@roeck-us.net>
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 <lkft@linaro.org>
Acked-by: Dan Carpenter <dan.carpenter@linaro.org>
Signed-off-by: Guenter Roeck <linux@roeck-us.net>
---
- Rebased to v6.9-rc1
- Added Tested-by:, Acked-by:, and Reviewed-by: tags
- Introduced KUNIT_SUPPRESS_BACKTRACE configuration option
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 <asm/brk-imm.h>
#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 <asm/asm-bug.h>
+#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); \
--
2.39.2
next prev parent reply other threads:[~2024-03-25 17:59 UTC|newest]
Thread overview: 23+ messages / expand[flat|nested] mbox.gz Atom feed top
2024-03-25 17:52 [PATCH v2 00/14] Add support for suppressing warning backtraces Guenter Roeck
2024-03-25 17:52 ` [PATCH v2 01/14] bug/kunit: Core " Guenter Roeck
2024-03-25 17:52 ` [PATCH v2 02/14] kunit: bug: Count suppressed " Guenter Roeck
2024-03-25 17:52 ` [PATCH v2 03/14] kunit: Add test cases for backtrace warning suppression Guenter Roeck
2024-03-25 17:52 ` [PATCH v2 04/14] kunit: Add documentation for warning backtrace suppression API Guenter Roeck
2024-03-25 17:52 ` [PATCH v2 05/14] drm: Suppress intentional warning backtraces in scaling unit tests Guenter Roeck
2024-03-25 19:05 ` Maíra Canal
2024-03-25 19:24 ` Guenter Roeck
2024-03-26 1:09 ` Maíra Canal
2024-03-26 5:02 ` Guenter Roeck
2024-03-25 17:52 ` [PATCH v2 06/14] net: kunit: Suppress lock warning noise at end of dev_addr_lists tests Guenter Roeck
2024-03-25 17:52 ` [PATCH v2 07/14] x86: Add support for suppressing warning backtraces Guenter Roeck
2024-03-25 17:52 ` Guenter Roeck [this message]
2024-03-25 17:52 ` [PATCH v2 09/14] loongarch: " Guenter Roeck
2024-03-25 17:52 ` [PATCH v2 10/14] parisc: " Guenter Roeck
2024-03-25 17:52 ` [PATCH v2 11/14] s390: " Guenter Roeck
2024-03-25 17:52 ` [PATCH v2 12/14] sh: " Guenter Roeck
2024-03-27 14:44 ` Simon Horman
2024-03-27 15:10 ` Guenter Roeck
2024-03-27 19:39 ` Simon Horman
2024-03-29 15:40 ` Guenter Roeck
2024-03-25 17:52 ` [PATCH v2 13/14] riscv: " Guenter Roeck
2024-03-25 17:52 ` [PATCH v2 14/14] powerpc: " Guenter Roeck
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