perf/util/evswitch.c

0001 // SPDX-License-Identifier: GPL-2.0-only
0002 // Copyright (C) 2019, Red Hat Inc, Arnaldo Carvalho de Melo <acme@redhat.com>
0003
0004 #include "evswitch.h"
0005 #include "evlist.h"
0006
0007 bool evswitch__discard(struct evswitch *evswitch, struct evsel *evsel)
0008 {
0009     if (evswitch->on && evswitch->discarding) {
0010         if (evswitch->on != evsel)
0011             return true;
0012
0013         evswitch->discarding = false;
0014
0015         if (!evswitch->show_on_off_events)
0016             return true;
0017
0018         return false;
0019     }
0020
0021     if (evswitch->off && !evswitch->discarding) {
0022         if (evswitch->off != evsel)
0023             return false;
0024
0025         evswitch->discarding = true;
0026
0027         if (!evswitch->show_on_off_events)
0028             return true;
0029     }
0030
0031     return false;
0032 }
0033
0034 static int evswitch__fprintf_enoent(FILE *fp, const char *evtype, const char *evname)
0035 {
0036     int printed = fprintf(fp, "ERROR: switch-%s event not found (%s)\n", evtype, evname);
0037
0038     return printed += fprintf(fp, "HINT:  use 'perf evlist' to see the available event names\n");
0039 }
0040
0041 int evswitch__init(struct evswitch *evswitch, struct evlist *evlist, FILE *fp)
0042 {
0043     if (evswitch->on_name) {
0044         evswitch->on = evlist__find_evsel_by_str(evlist, evswitch->on_name);
0045         if (evswitch->on == NULL) {
0046             evswitch__fprintf_enoent(fp, "on", evswitch->on_name);
0047             return -ENOENT;
0048         }
0049         evswitch->discarding = true;
0050     }
0051
0052     if (evswitch->off_name) {
0053         evswitch->off = evlist__find_evsel_by_str(evlist, evswitch->off_name);
0054         if (evswitch->off == NULL) {
0055             evswitch__fprintf_enoent(fp, "off", evswitch->off_name);
0056             return -ENOENT;
0057         }
0058     }
0059
0060     return 0;
0061 }