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| author | Dmitry Vyukov <dvyukov@google.com> | 2024-06-11 09:50:33 +0200 |
|---|---|---|
| committer | Thomas Gleixner <tglx@linutronix.de> | 2024-08-08 17:36:35 +0200 |
| commit | ae94b263f5f69c180347e795fbefa051b65aacc3 (patch) | |
| tree | 5e410a62933c2ddae27d3773b41dbff52eca2d15 | |
| parent | f34d086fb7102fec895fd58b9e816b981b284c17 (diff) | |
| download | linux-stable-ae94b263f5f69c180347e795fbefa051b65aacc3.tar.gz linux-stable-ae94b263f5f69c180347e795fbefa051b65aacc3.tar.bz2 linux-stable-ae94b263f5f69c180347e795fbefa051b65aacc3.zip | |
x86: Ignore stack unwinding in KCOV
Stack unwinding produces large amounts of uninteresting coverage.
It's called from KASAN kmalloc/kfree hooks, fault injection, etc.
It's not particularly useful and is not a function of system call args.
Ignore that code.
Signed-off-by: Dmitry Vyukov <dvyukov@google.com>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Reviewed-by: Alexander Potapenko <glider@google.com>
Reviewed-by: Marco Elver <elver@google.com>
Reviewed-by: Andrey Konovalov <andreyknvl@gmail.com>
Acked-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Link: https://lore.kernel.org/all/eaf54b8634970b73552dcd38bf9be6ef55238c10.1718092070.git.dvyukov@google.com
| -rw-r--r-- | arch/x86/kernel/Makefile | 8 |
1 files changed, 8 insertions, 0 deletions
diff --git a/arch/x86/kernel/Makefile b/arch/x86/kernel/Makefile index a847180836e4..f7918980667a 100644 --- a/arch/x86/kernel/Makefile +++ b/arch/x86/kernel/Makefile @@ -35,6 +35,14 @@ KMSAN_SANITIZE_nmi.o := n # If instrumentation of the following files is enabled, boot hangs during # first second. KCOV_INSTRUMENT_head$(BITS).o := n +# These are called from save_stack_trace() on debug paths, +# and produce large amounts of uninteresting coverage. +KCOV_INSTRUMENT_stacktrace.o := n +KCOV_INSTRUMENT_dumpstack.o := n +KCOV_INSTRUMENT_dumpstack_$(BITS).o := n +KCOV_INSTRUMENT_unwind_orc.o := n +KCOV_INSTRUMENT_unwind_frame.o := n +KCOV_INSTRUMENT_unwind_guess.o := n CFLAGS_irq.o := -I $(src)/../include/asm/trace |