Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
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kernel
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linux
1// SPDX-License-Identifier: GPL-2.0-only
2// Copyright (C) 2019, Red Hat Inc, Arnaldo Carvalho de Melo <acme@redhat.com>
3
4#include <errno.h>
5#include "evswitch.h"
6#include "evlist.h"
7
8bool evswitch__discard(struct evswitch *evswitch, struct evsel *evsel)
9{
10 if (evswitch->on && evswitch->discarding) {
11 if (evswitch->on != evsel)
12 return true;
13
14 evswitch->discarding = false;
15
16 if (!evswitch->show_on_off_events)
17 return true;
18
19 return false;
20 }
21
22 if (evswitch->off && !evswitch->discarding) {
23 if (evswitch->off != evsel)
24 return false;
25
26 evswitch->discarding = true;
27
28 if (!evswitch->show_on_off_events)
29 return true;
30 }
31
32 return false;
33}
34
35static int evswitch__fprintf_enoent(FILE *fp, const char *evtype, const char *evname)
36{
37 int printed = fprintf(fp, "ERROR: switch-%s event not found (%s)\n", evtype, evname);
38
39 return printed += fprintf(fp, "HINT: use 'perf evlist' to see the available event names\n");
40}
41
42int evswitch__init(struct evswitch *evswitch, struct evlist *evlist, FILE *fp)
43{
44 if (evswitch->on_name) {
45 evswitch->on = evlist__find_evsel_by_str(evlist, evswitch->on_name);
46 if (evswitch->on == NULL) {
47 evswitch__fprintf_enoent(fp, "on", evswitch->on_name);
48 return -ENOENT;
49 }
50 evswitch->discarding = true;
51 }
52
53 if (evswitch->off_name) {
54 evswitch->off = evlist__find_evsel_by_str(evlist, evswitch->off_name);
55 if (evswitch->off == NULL) {
56 evswitch__fprintf_enoent(fp, "off", evswitch->off_name);
57 return -ENOENT;
58 }
59 }
60
61 return 0;
62}