Merge drm/drm-next into drm-intel-next
[linux-2.6-microblaze.git] / tools / perf / tests / keep-tracking.c
1 // SPDX-License-Identifier: GPL-2.0
2 #include <linux/types.h>
3 #include <limits.h>
4 #include <unistd.h>
5 #include <sys/prctl.h>
6 #include <perf/cpumap.h>
7 #include <perf/evlist.h>
8 #include <perf/mmap.h>
9
10 #include "debug.h"
11 #include "parse-events.h"
12 #include "evlist.h"
13 #include "evsel.h"
14 #include "record.h"
15 #include "thread_map.h"
16 #include "tests.h"
17 #include "util/mmap.h"
18
19 #define CHECK__(x) {                            \
20         while ((x) < 0) {                       \
21                 pr_debug(#x " failed!\n");      \
22                 goto out_err;                   \
23         }                                       \
24 }
25
26 #define CHECK_NOT_NULL__(x) {                   \
27         while ((x) == NULL) {                   \
28                 pr_debug(#x " failed!\n");      \
29                 goto out_err;                   \
30         }                                       \
31 }
32
33 static int find_comm(struct evlist *evlist, const char *comm)
34 {
35         union perf_event *event;
36         struct mmap *md;
37         int i, found;
38
39         found = 0;
40         for (i = 0; i < evlist->core.nr_mmaps; i++) {
41                 md = &evlist->mmap[i];
42                 if (perf_mmap__read_init(&md->core) < 0)
43                         continue;
44                 while ((event = perf_mmap__read_event(&md->core)) != NULL) {
45                         if (event->header.type == PERF_RECORD_COMM &&
46                             (pid_t)event->comm.pid == getpid() &&
47                             (pid_t)event->comm.tid == getpid() &&
48                             strcmp(event->comm.comm, comm) == 0)
49                                 found += 1;
50                         perf_mmap__consume(&md->core);
51                 }
52                 perf_mmap__read_done(&md->core);
53         }
54         return found;
55 }
56
57 /**
58  * test__keep_tracking - test using a dummy software event to keep tracking.
59  *
60  * This function implements a test that checks that tracking events continue
61  * when an event is disabled but a dummy software event is not disabled.  If the
62  * test passes %0 is returned, otherwise %-1 is returned.
63  */
64 int test__keep_tracking(struct test *test __maybe_unused, int subtest __maybe_unused)
65 {
66         struct record_opts opts = {
67                 .mmap_pages          = UINT_MAX,
68                 .user_freq           = UINT_MAX,
69                 .user_interval       = ULLONG_MAX,
70                 .target              = {
71                         .uses_mmap   = true,
72                 },
73         };
74         struct perf_thread_map *threads = NULL;
75         struct perf_cpu_map *cpus = NULL;
76         struct evlist *evlist = NULL;
77         struct evsel *evsel = NULL;
78         int found, err = -1;
79         const char *comm;
80
81         threads = thread_map__new(-1, getpid(), UINT_MAX);
82         CHECK_NOT_NULL__(threads);
83
84         cpus = perf_cpu_map__new(NULL);
85         CHECK_NOT_NULL__(cpus);
86
87         evlist = evlist__new();
88         CHECK_NOT_NULL__(evlist);
89
90         perf_evlist__set_maps(&evlist->core, cpus, threads);
91
92         CHECK__(parse_events(evlist, "dummy:u", NULL));
93         CHECK__(parse_events(evlist, "cycles:u", NULL));
94
95         evlist__config(evlist, &opts, NULL);
96
97         evsel = evlist__first(evlist);
98
99         evsel->core.attr.comm = 1;
100         evsel->core.attr.disabled = 1;
101         evsel->core.attr.enable_on_exec = 0;
102
103         if (evlist__open(evlist) < 0) {
104                 pr_debug("Unable to open dummy and cycles event\n");
105                 err = TEST_SKIP;
106                 goto out_err;
107         }
108
109         CHECK__(evlist__mmap(evlist, UINT_MAX));
110
111         /*
112          * First, test that a 'comm' event can be found when the event is
113          * enabled.
114          */
115
116         evlist__enable(evlist);
117
118         comm = "Test COMM 1";
119         CHECK__(prctl(PR_SET_NAME, (unsigned long)comm, 0, 0, 0));
120
121         evlist__disable(evlist);
122
123         found = find_comm(evlist, comm);
124         if (found != 1) {
125                 pr_debug("First time, failed to find tracking event.\n");
126                 goto out_err;
127         }
128
129         /*
130          * Secondly, test that a 'comm' event can be found when the event is
131          * disabled with the dummy event still enabled.
132          */
133
134         evlist__enable(evlist);
135
136         evsel = evlist__last(evlist);
137
138         CHECK__(evsel__disable(evsel));
139
140         comm = "Test COMM 2";
141         CHECK__(prctl(PR_SET_NAME, (unsigned long)comm, 0, 0, 0));
142
143         evlist__disable(evlist);
144
145         found = find_comm(evlist, comm);
146         if (found != 1) {
147                 pr_debug("Second time, failed to find tracking event.\n");
148                 goto out_err;
149         }
150
151         err = 0;
152
153 out_err:
154         if (evlist) {
155                 evlist__disable(evlist);
156                 evlist__delete(evlist);
157         } else {
158                 perf_cpu_map__put(cpus);
159                 perf_thread_map__put(threads);
160         }
161
162         return err;
163 }