perf trace: Order -e syscalls table

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@intel.com>
Cc: Jiri Olsa <jolsa@kernel.org>
Cc: Luis Cláudio Gonçalves <lclaudio@redhat.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Link: https://lkml.kernel.org/n/tip-c8hprylp3ai6e0z9burn2r3s@git.kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>

diff --git a/tools/perf/builtin-trace.c b/tools/perf/builtin-trace.c
index bfd739a..9bd5ecd 100644 (file)
--- 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 @@ matches:
        }
 
        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");