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