Messages in this thread Patch in this message | | | Date | Mon, 15 Jan 2018 21:00:10 -0500 | From | Steven Rostedt <> | Subject | [PATCH 2/2] tracing: Prevent PROFILE_ALL_BRANCHES when FORTIFY_SOURCE=y |
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From: Randy Dunlap <rdunlap@infradead.org>
I regularly get 50 MB - 60 MB files during kernel randconfig builds. These large files mostly contain (many repeats of; e.g., 124,594):
In file included from ../include/linux/string.h:6:0, from ../include/linux/uuid.h:20, from ../include/linux/mod_devicetable.h:13, from ../scripts/mod/devicetable-offsets.c:3: ../include/linux/compiler.h:64:4: warning: '______f' is static but declared in inline function 'strcpy' which is not static [enabled by default] ______f = { \ ^ ../include/linux/compiler.h:56:23: note: in expansion of macro '__trace_if' ^ ../include/linux/string.h:425:2: note: in expansion of macro 'if' if (p_size == (size_t)-1 && q_size == (size_t)-1) ^
This only happens when CONFIG_FORTIFY_SOURCE=y and CONFIG_PROFILE_ALL_BRANCHES=y, so prevent PROFILE_ALL_BRANCHES if FORTIFY_SOURCE=y.
Link: http://lkml.kernel.org/r/9199446b-a141-c0c3-9678-a3f9107f2750@infradead.org
Signed-off-by: Randy Dunlap <rdunlap@infradead.org> Signed-off-by: Steven Rostedt (VMware) <rostedt@goodmis.org> --- kernel/trace/Kconfig | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/kernel/trace/Kconfig b/kernel/trace/Kconfig index 904c952ac383..f54dc62b599c 100644 --- a/kernel/trace/Kconfig +++ b/kernel/trace/Kconfig @@ -355,7 +355,7 @@ config PROFILE_ANNOTATED_BRANCHES on if you need to profile the system's use of these macros. config PROFILE_ALL_BRANCHES - bool "Profile all if conditionals" + bool "Profile all if conditionals" if !FORTIFY_SOURCE select TRACE_BRANCH_PROFILING help This tracer profiles all branch conditions. Every if () -- 2.13.2
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