diff options
| author | Ian Rogers <irogers@google.com> | 2022-10-24 11:19:11 -0700 |
|---|---|---|
| committer | Arnaldo Carvalho de Melo <acme@redhat.com> | 2022-11-03 09:37:31 -0300 |
| commit | 01513fdc18f395dbcc924bc5e9962b12f86f947a (patch) | |
| tree | c83244301d30f8708aa439f154d9ff6a9e803650 /tools/perf/builtin-stat.c | |
| parent | 057929f9d083e80c9b30c324add69d2054ca6d82 (diff) | |
| download | linux-stable-01513fdc18f395dbcc924bc5e9962b12f86f947a.tar.gz linux-stable-01513fdc18f395dbcc924bc5e9962b12f86f947a.tar.bz2 linux-stable-01513fdc18f395dbcc924bc5e9962b12f86f947a.zip | |
perf stat: Use sig_atomic_t to avoid undefined behaviour in a signal handler
Use sig_atomic_t for variables written/accessed in signal
handlers. This is undefined behavior as per:
https://wiki.sei.cmu.edu/confluence/display/c/SIG31-C.+Do+not+access+shared+objects+in+signal+handlers
Signed-off-by: Ian Rogers <irogers@google.com>
Cc: Adrian Hunter <adrian.hunter@intel.com>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: Alexey Bayduraev <alexey.v.bayduraev@linux.intel.com>
Cc: German Gomez <german.gomez@arm.com>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: Jiri Olsa <jolsa@kernel.org>
Cc: Leo Yan <leo.yan@linaro.org>
Cc: Mark Rutland <mark.rutland@arm.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Stephane Eranian <eranian@google.com>
Link: https://lore.kernel.org/r/20221024181913.630986-7-irogers@google.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Diffstat (limited to 'tools/perf/builtin-stat.c')
| -rw-r--r-- | tools/perf/builtin-stat.c | 8 |
1 files changed, 4 insertions, 4 deletions
diff --git a/tools/perf/builtin-stat.c b/tools/perf/builtin-stat.c index e52601a54b26..d5e1670bca20 100644 --- a/tools/perf/builtin-stat.c +++ b/tools/perf/builtin-stat.c @@ -173,7 +173,7 @@ static struct target target = { #define METRIC_ONLY_LEN 20 -static volatile pid_t child_pid = -1; +static volatile sig_atomic_t child_pid = -1; static int detailed_run = 0; static bool transaction_run; static bool topdown_run = false; @@ -208,7 +208,7 @@ struct perf_stat { static struct perf_stat perf_stat; #define STAT_RECORD perf_stat.record -static volatile int done = 0; +static volatile sig_atomic_t done = 0; static struct perf_stat_config stat_config = { .aggr_mode = AGGR_GLOBAL, @@ -580,7 +580,7 @@ static void disable_counters(void) } } -static volatile int workload_exec_errno; +static volatile sig_atomic_t workload_exec_errno; /* * evlist__prepare_workload will send a SIGUSR1 @@ -1039,7 +1039,7 @@ static void print_counters(struct timespec *ts, int argc, const char **argv) evlist__print_counters(evsel_list, &stat_config, &target, ts, argc, argv); } -static volatile int signr = -1; +static volatile sig_atomic_t signr = -1; static void skip_signal(int signo) { |