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| author | Marco Elver <elver@google.com> | 2020-01-10 19:48:33 +0100 |
|---|---|---|
| committer | Ingo Molnar <mingo@kernel.org> | 2020-03-21 09:40:42 +0100 |
| commit | 47144eca282189afcf34ef25aee8408c168765d4 (patch) | |
| tree | d115d6c97f6fe56c9be7194d83077db8f3a4f185 /kernel/kcsan/core.c | |
| parent | 5c361425744d1e3b03d835dde659708683ca27d1 (diff) | |
| download | linux-stable-47144eca282189afcf34ef25aee8408c168765d4.tar.gz linux-stable-47144eca282189afcf34ef25aee8408c168765d4.tar.bz2 linux-stable-47144eca282189afcf34ef25aee8408c168765d4.zip | |
kcsan: Show full access type in report
This commit adds access-type information to KCSAN's reports as follows:
"read", "read (marked)", "write", and "write (marked)".
Suggested-by: Paul E. McKenney <paulmck@kernel.org>
Signed-off-by: Marco Elver <elver@google.com>
Signed-off-by: Paul E. McKenney <paulmck@kernel.org>
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Diffstat (limited to 'kernel/kcsan/core.c')
| -rw-r--r-- | kernel/kcsan/core.c | 15 |
1 files changed, 8 insertions, 7 deletions
diff --git a/kernel/kcsan/core.c b/kernel/kcsan/core.c index 4d4ab5c5dc53..87bf857c8893 100644 --- a/kernel/kcsan/core.c +++ b/kernel/kcsan/core.c @@ -255,7 +255,7 @@ static inline unsigned int get_delay(void) static noinline void kcsan_found_watchpoint(const volatile void *ptr, size_t size, - bool is_write, + int type, atomic_long_t *watchpoint, long encoded_watchpoint) { @@ -276,7 +276,7 @@ static noinline void kcsan_found_watchpoint(const volatile void *ptr, flags = user_access_save(); if (consumed) { - kcsan_report(ptr, size, is_write, true, raw_smp_processor_id(), + kcsan_report(ptr, size, type, true, raw_smp_processor_id(), KCSAN_REPORT_CONSUMED_WATCHPOINT); } else { /* @@ -292,8 +292,9 @@ static noinline void kcsan_found_watchpoint(const volatile void *ptr, } static noinline void -kcsan_setup_watchpoint(const volatile void *ptr, size_t size, bool is_write) +kcsan_setup_watchpoint(const volatile void *ptr, size_t size, int type) { + const bool is_write = (type & KCSAN_ACCESS_WRITE) != 0; atomic_long_t *watchpoint; union { u8 _1; @@ -415,13 +416,13 @@ kcsan_setup_watchpoint(const volatile void *ptr, size_t size, bool is_write) * No need to increment 'data_races' counter, as the racing * thread already did. */ - kcsan_report(ptr, size, is_write, size > 8 || value_change, + kcsan_report(ptr, size, type, size > 8 || value_change, smp_processor_id(), KCSAN_REPORT_RACE_SIGNAL); } else if (value_change) { /* Inferring a race, since the value should not have changed. */ kcsan_counter_inc(KCSAN_COUNTER_RACES_UNKNOWN_ORIGIN); if (IS_ENABLED(CONFIG_KCSAN_REPORT_RACE_UNKNOWN_ORIGIN)) - kcsan_report(ptr, size, is_write, true, + kcsan_report(ptr, size, type, true, smp_processor_id(), KCSAN_REPORT_RACE_UNKNOWN_ORIGIN); } @@ -455,10 +456,10 @@ static __always_inline void check_access(const volatile void *ptr, size_t size, */ if (unlikely(watchpoint != NULL)) - kcsan_found_watchpoint(ptr, size, is_write, watchpoint, + kcsan_found_watchpoint(ptr, size, type, watchpoint, encoded_watchpoint); else if (unlikely(should_watch(ptr, type))) - kcsan_setup_watchpoint(ptr, size, is_write); + kcsan_setup_watchpoint(ptr, size, type); } /* === Public interface ===================================================== */ |