[PATCH 06/37] perf trace: Order -e syscalls table

[Arnaldo Carvalho de Melo]

From: Arnaldo Carvalho de Melo <acme@xxxxxxxxxx>

The ev_qualifier is an array with the syscall ids passed via -e on the
command line, sort it as we'll search it when setting up the
BPF_MAP_TYPE_PROG_ARRAY.

Cc: Adrian Hunter <adrian.hunter@xxxxxxxxx>
Cc: Jiri Olsa <jolsa@xxxxxxxxxx>
Cc: Luis ClÃudio GonÃalves <lclaudio@xxxxxxxxxx>
Cc: Namhyung Kim <namhyung@xxxxxxxxxx>
Link: https://lkml.kernel.org/n/tip-c8hprylp3ai6e0z9burn2r3s@xxxxxxxxxxxxxx
Signed-off-by: Arnaldo Carvalho de Melo <acme@xxxxxxxxxx>
---
 tools/perf/builtin-trace.c | 8 ++++++++
 1 file changed, 8 insertions(+)

diff --git a/tools/perf/builtin-trace.c b/tools/perf/builtin-trace.c
index bfd739a321d1..9bd5ecd6a8dd 100644
--- a/tools/perf/builtin-trace.c
+++ b/tools/perf/builtin-trace.c
@@ -1528,6 +1528,13 @@ static int trace__read_syscall_info(struct trace *trace, int id)
 	return syscall__set_arg_fmts(sc);
 }
 
+static int intcmp(const void *a, const void *b)
+{
+	const int *one = a, *another = b;
+
+	return *one - *another;
+}
+
 static int trace__validate_ev_qualifier(struct trace *trace)
 {
 	int err = 0;
@@ -1591,6 +1598,7 @@ static int trace__validate_ev_qualifier(struct trace *trace)
 	}
 
 	trace->ev_qualifier_ids.nr = nr_used;
+	qsort(trace->ev_qualifier_ids.entries, nr_used, sizeof(int), intcmp);
 out:
 	if (printed_invalid_prefix)
 		pr_debug("\n");
-- 
2.21.0