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b2441318 | 1 | // SPDX-License-Identifier: GPL-2.0 |
d944c4ee | 2 | #include <linux/types.h> |
395c3070 AH |
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 | ||
27 | static int find_comm(struct perf_evlist *evlist, const char *comm) | |
28 | { | |
29 | union perf_event *event; | |
30 | int i, found; | |
31 | ||
32 | found = 0; | |
33 | for (i = 0; i < evlist->nr_mmaps; i++) { | |
34 | while ((event = perf_evlist__mmap_read(evlist, i)) != NULL) { | |
35 | if (event->header.type == PERF_RECORD_COMM && | |
36 | (pid_t)event->comm.pid == getpid() && | |
37 | (pid_t)event->comm.tid == getpid() && | |
38 | strcmp(event->comm.comm, comm) == 0) | |
39 | found += 1; | |
8e50d384 | 40 | perf_evlist__mmap_consume(evlist, i); |
395c3070 AH |
41 | } |
42 | } | |
43 | return found; | |
44 | } | |
45 | ||
46 | /** | |
47 | * test__keep_tracking - test using a dummy software event to keep tracking. | |
48 | * | |
49 | * This function implements a test that checks that tracking events continue | |
50 | * when an event is disabled but a dummy software event is not disabled. If the | |
51 | * test passes %0 is returned, otherwise %-1 is returned. | |
52 | */ | |
81f17c90 | 53 | int test__keep_tracking(struct test *test __maybe_unused, int subtest __maybe_unused) |
395c3070 | 54 | { |
b4006796 | 55 | struct record_opts opts = { |
395c3070 AH |
56 | .mmap_pages = UINT_MAX, |
57 | .user_freq = UINT_MAX, | |
58 | .user_interval = ULLONG_MAX, | |
395c3070 AH |
59 | .target = { |
60 | .uses_mmap = true, | |
61 | }, | |
62 | }; | |
63 | struct thread_map *threads = NULL; | |
64 | struct cpu_map *cpus = NULL; | |
65 | struct perf_evlist *evlist = NULL; | |
66 | struct perf_evsel *evsel = NULL; | |
67 | int found, err = -1; | |
68 | const char *comm; | |
69 | ||
70 | threads = thread_map__new(-1, getpid(), UINT_MAX); | |
71 | CHECK_NOT_NULL__(threads); | |
72 | ||
73 | cpus = cpu_map__new(NULL); | |
74 | CHECK_NOT_NULL__(cpus); | |
75 | ||
76 | evlist = perf_evlist__new(); | |
77 | CHECK_NOT_NULL__(evlist); | |
78 | ||
79 | perf_evlist__set_maps(evlist, cpus, threads); | |
80 | ||
b39b8393 JO |
81 | CHECK__(parse_events(evlist, "dummy:u", NULL)); |
82 | CHECK__(parse_events(evlist, "cycles:u", NULL)); | |
395c3070 | 83 | |
e68ae9cf | 84 | perf_evlist__config(evlist, &opts, NULL); |
395c3070 AH |
85 | |
86 | evsel = perf_evlist__first(evlist); | |
87 | ||
88 | evsel->attr.comm = 1; | |
89 | evsel->attr.disabled = 1; | |
90 | evsel->attr.enable_on_exec = 0; | |
91 | ||
92 | if (perf_evlist__open(evlist) < 0) { | |
597bdeb4 WN |
93 | pr_debug("Unable to open dummy and cycles event\n"); |
94 | err = TEST_SKIP; | |
395c3070 AH |
95 | goto out_err; |
96 | } | |
97 | ||
f74b9d3a | 98 | CHECK__(perf_evlist__mmap(evlist, UINT_MAX)); |
395c3070 AH |
99 | |
100 | /* | |
101 | * First, test that a 'comm' event can be found when the event is | |
102 | * enabled. | |
103 | */ | |
104 | ||
105 | perf_evlist__enable(evlist); | |
106 | ||
107 | comm = "Test COMM 1"; | |
108 | CHECK__(prctl(PR_SET_NAME, (unsigned long)comm, 0, 0, 0)); | |
109 | ||
110 | perf_evlist__disable(evlist); | |
111 | ||
112 | found = find_comm(evlist, comm); | |
113 | if (found != 1) { | |
114 | pr_debug("First time, failed to find tracking event.\n"); | |
115 | goto out_err; | |
116 | } | |
117 | ||
118 | /* | |
119 | * Secondly, test that a 'comm' event can be found when the event is | |
120 | * disabled with the dummy event still enabled. | |
121 | */ | |
122 | ||
123 | perf_evlist__enable(evlist); | |
124 | ||
125 | evsel = perf_evlist__last(evlist); | |
126 | ||
d2190a80 | 127 | CHECK__(perf_evsel__disable(evsel)); |
395c3070 AH |
128 | |
129 | comm = "Test COMM 2"; | |
130 | CHECK__(prctl(PR_SET_NAME, (unsigned long)comm, 0, 0, 0)); | |
131 | ||
132 | perf_evlist__disable(evlist); | |
133 | ||
134 | found = find_comm(evlist, comm); | |
135 | if (found != 1) { | |
136 | pr_debug("Seconf time, failed to find tracking event.\n"); | |
137 | goto out_err; | |
138 | } | |
139 | ||
140 | err = 0; | |
141 | ||
142 | out_err: | |
143 | if (evlist) { | |
144 | perf_evlist__disable(evlist); | |
395c3070 | 145 | perf_evlist__delete(evlist); |
03ad9747 | 146 | } else { |
f30a79b0 | 147 | cpu_map__put(cpus); |
186fbb74 | 148 | thread_map__put(threads); |
03ad9747 | 149 | } |
395c3070 AH |
150 | |
151 | return err; | |
152 | } |