1 #include <linux/types.h>
5 #include "parse-events.h"
8 #include "thread_map.h"
12 #define CHECK__(x) { \
14 pr_debug(#x " failed!\n"); \
19 #define CHECK_NOT_NULL__(x) { \
20 while ((x) == NULL) { \
21 pr_debug(#x " failed!\n"); \
26 static int find_comm(struct perf_evlist *evlist, const char *comm)
28 union perf_event *event;
32 for (i = 0; i < evlist->nr_mmaps; i++) {
33 while ((event = perf_evlist__mmap_read(evlist, i)) != NULL) {
34 if (event->header.type == PERF_RECORD_COMM &&
35 (pid_t)event->comm.pid == getpid() &&
36 (pid_t)event->comm.tid == getpid() &&
37 strcmp(event->comm.comm, comm) == 0)
39 perf_evlist__mmap_consume(evlist, i);
46 * test__keep_tracking - test using a dummy software event to keep tracking.
48 * This function implements a test that checks that tracking events continue
49 * when an event is disabled but a dummy software event is not disabled. If the
50 * test passes %0 is returned, otherwise %-1 is returned.
52 int test__keep_tracking(int subtest __maybe_unused)
54 struct record_opts opts = {
55 .mmap_pages = UINT_MAX,
56 .user_freq = UINT_MAX,
57 .user_interval = ULLONG_MAX,
62 struct thread_map *threads = NULL;
63 struct cpu_map *cpus = NULL;
64 struct perf_evlist *evlist = NULL;
65 struct perf_evsel *evsel = NULL;
69 threads = thread_map__new(-1, getpid(), UINT_MAX);
70 CHECK_NOT_NULL__(threads);
72 cpus = cpu_map__new(NULL);
73 CHECK_NOT_NULL__(cpus);
75 evlist = perf_evlist__new();
76 CHECK_NOT_NULL__(evlist);
78 perf_evlist__set_maps(evlist, cpus, threads);
80 CHECK__(parse_events(evlist, "dummy:u", NULL));
81 CHECK__(parse_events(evlist, "cycles:u", NULL));
83 perf_evlist__config(evlist, &opts, NULL);
85 evsel = perf_evlist__first(evlist);
88 evsel->attr.disabled = 1;
89 evsel->attr.enable_on_exec = 0;
91 if (perf_evlist__open(evlist) < 0) {
92 pr_debug("Unable to open dummy and cycles event\n");
97 CHECK__(perf_evlist__mmap(evlist, UINT_MAX, false));
100 * First, test that a 'comm' event can be found when the event is
104 perf_evlist__enable(evlist);
106 comm = "Test COMM 1";
107 CHECK__(prctl(PR_SET_NAME, (unsigned long)comm, 0, 0, 0));
109 perf_evlist__disable(evlist);
111 found = find_comm(evlist, comm);
113 pr_debug("First time, failed to find tracking event.\n");
118 * Secondly, test that a 'comm' event can be found when the event is
119 * disabled with the dummy event still enabled.
122 perf_evlist__enable(evlist);
124 evsel = perf_evlist__last(evlist);
126 CHECK__(perf_evsel__disable(evsel));
128 comm = "Test COMM 2";
129 CHECK__(prctl(PR_SET_NAME, (unsigned long)comm, 0, 0, 0));
131 perf_evlist__disable(evlist);
133 found = find_comm(evlist, comm);
135 pr_debug("Seconf time, failed to find tracking event.\n");
143 perf_evlist__disable(evlist);
144 perf_evlist__delete(evlist);
147 thread_map__put(threads);