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Subject[PATCH 06/37] perf trace: Order -e syscalls table
Date
From: Arnaldo Carvalho de Melo <acme@redhat.com>

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>
---
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
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