4.20-stable review patch. If anyone has any objections, please let me know.
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[ Upstream commit 51433ead1460fb3f46e1c34f68bb22fd2dd0f5d0 ]
Some 'perf stat' options do not make sense to be negated (event, cgroup), some do not have negated path implemented (metrics). Due to that, it is better to disable the "no-" prefix for them, since otherwise, the later opt-parsing segfaults.
Before:
$ perf stat --no-metrics -- ls Segmentation fault (core dumped)
After:
$ perf stat --no-metrics -- ls Error: option `no-metrics' isn't available Usage: perf stat [<options>] [<command>]
Signed-off-by: Michael Petlan mpetlan@redhat.com Tested-by: Arnaldo Carvalho de Melo acme@redhat.com LPU-Reference: 1485912065.62416880.1544457604340.JavaMail.zimbra@redhat.com Signed-off-by: Arnaldo Carvalho de Melo acme@redhat.com Signed-off-by: Sasha Levin sashal@kernel.org --- tools/perf/builtin-stat.c | 8 +++++++- 1 file changed, 7 insertions(+), 1 deletion(-)
diff --git a/tools/perf/builtin-stat.c b/tools/perf/builtin-stat.c index a635abfa77b6..1410d66192f7 100644 --- a/tools/perf/builtin-stat.c +++ b/tools/perf/builtin-stat.c @@ -709,7 +709,7 @@ static int parse_metric_groups(const struct option *opt, return metricgroup__parse_groups(opt, str, &stat_config.metric_events); }
-static const struct option stat_options[] = { +static struct option stat_options[] = { OPT_BOOLEAN('T', "transaction", &transaction_run, "hardware transaction statistics"), OPT_CALLBACK('e', "event", &evsel_list, "event", @@ -1599,6 +1599,12 @@ int cmd_stat(int argc, const char **argv) return -ENOMEM;
parse_events__shrink_config_terms(); + + /* String-parsing callback-based options would segfault when negated */ + set_option_flag(stat_options, 'e', "event", PARSE_OPT_NONEG); + set_option_flag(stat_options, 'M', "metrics", PARSE_OPT_NONEG); + set_option_flag(stat_options, 'G', "cgroup", PARSE_OPT_NONEG); + argc = parse_options_subcommand(argc, argv, stat_options, stat_subcommands, (const char **) stat_usage, PARSE_OPT_STOP_AT_NON_OPTION);