linux/kernel/gcov
Nick Desaulniers 51c2ee6d12 Kconfig: Introduce ARCH_WANTS_NO_INSTR and CC_HAS_NO_PROFILE_FN_ATTR
We don't want compiler instrumentation to touch noinstr functions,
which are annotated with the no_profile_instrument_function function
attribute. Add a Kconfig test for this and make GCOV depend on it, and
in the future, PGO.

If an architecture is using noinstr, it should denote that via this
Kconfig value. That makes Kconfigs that depend on noinstr able to express
dependencies in an architecturally agnostic way.

Cc: Masahiro Yamada <masahiroy@kernel.org>
Link: https://lore.kernel.org/lkml/YMTn9yjuemKFLbws@hirez.programming.kicks-ass.net/
Link: https://lore.kernel.org/lkml/YMcssV%2Fn5IBGv4f0@hirez.programming.kicks-ass.net/
Suggested-by: Nathan Chancellor <nathan@kernel.org>
Suggested-by: Peter Zijlstra <peterz@infradead.org>
Signed-off-by: Nick Desaulniers <ndesaulniers@google.com>
Reviewed-by: Peter Oberparleiter <oberpar@linux.ibm.com>
Reviewed-by: Nathan Chancellor <nathan@kernel.org>
Acked-by: Mark Rutland <mark.rutland@arm.com>
Acked-by: Heiko Carstens <hca@linux.ibm.com>
Acked-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Signed-off-by: Kees Cook <keescook@chromium.org>
Link: https://lore.kernel.org/r/20210621231822.2848305-4-ndesaulniers@google.com
2021-06-22 11:07:18 -07:00
..
base.c gcov: combine common code 2021-05-07 00:26:32 -07:00
clang.c gcov: clang: drop support for clang-10 and older 2021-05-07 00:26:32 -07:00
fs.c gcov: use kvmalloc() 2021-05-07 00:26:32 -07:00
gcc_4_7.c gcov: use kvmalloc() 2021-05-07 00:26:32 -07:00
gcc_base.c gcov: clang: move common GCC code into gcc_base.c 2019-05-14 19:52:51 -07:00
gcov.h gcov: combine common code 2021-05-07 00:26:32 -07:00
Kconfig Kconfig: Introduce ARCH_WANTS_NO_INSTR and CC_HAS_NO_PROFILE_FN_ATTR 2021-06-22 11:07:18 -07:00
Makefile gcov: Remove old GCC 3.4 support 2020-04-16 12:28:35 +01:00