Commit | Line | Data |
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d944c4ee | 1 | #include <linux/types.h> |
395c3070 AH |
2 | #include <unistd.h> |
3 | #include <sys/prctl.h> | |
4 | ||
5 | #include "parse-events.h" | |
6 | #include "evlist.h" | |
7 | #include "evsel.h" | |
8 | #include "thread_map.h" | |
9 | #include "cpumap.h" | |
10 | #include "tests.h" | |
11 | ||
12 | #define CHECK__(x) { \ | |
13 | while ((x) < 0) { \ | |
14 | pr_debug(#x " failed!\n"); \ | |
15 | goto out_err; \ | |
16 | } \ | |
17 | } | |
18 | ||
19 | #define CHECK_NOT_NULL__(x) { \ | |
20 | while ((x) == NULL) { \ | |
21 | pr_debug(#x " failed!\n"); \ | |
22 | goto out_err; \ | |
23 | } \ | |
24 | } | |
25 | ||
26 | static int find_comm(struct perf_evlist *evlist, const char *comm) | |
27 | { | |
28 | union perf_event *event; | |
29 | int i, found; | |
30 | ||
31 | found = 0; | |
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) | |
38 | found += 1; | |
8e50d384 | 39 | perf_evlist__mmap_consume(evlist, i); |
395c3070 AH |
40 | } |
41 | } | |
42 | return found; | |
43 | } | |
44 | ||
45 | /** | |
46 | * test__keep_tracking - test using a dummy software event to keep tracking. | |
47 | * | |
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. | |
51 | */ | |
721a1f53 | 52 | int test__keep_tracking(int subtest __maybe_unused) |
395c3070 | 53 | { |
b4006796 | 54 | struct record_opts opts = { |
395c3070 AH |
55 | .mmap_pages = UINT_MAX, |
56 | .user_freq = UINT_MAX, | |
57 | .user_interval = ULLONG_MAX, | |
395c3070 AH |
58 | .target = { |
59 | .uses_mmap = true, | |
60 | }, | |
61 | }; | |
62 | struct thread_map *threads = NULL; | |
63 | struct cpu_map *cpus = NULL; | |
64 | struct perf_evlist *evlist = NULL; | |
65 | struct perf_evsel *evsel = NULL; | |
66 | int found, err = -1; | |
67 | const char *comm; | |
68 | ||
69 | threads = thread_map__new(-1, getpid(), UINT_MAX); | |
70 | CHECK_NOT_NULL__(threads); | |
71 | ||
72 | cpus = cpu_map__new(NULL); | |
73 | CHECK_NOT_NULL__(cpus); | |
74 | ||
75 | evlist = perf_evlist__new(); | |
76 | CHECK_NOT_NULL__(evlist); | |
77 | ||
78 | perf_evlist__set_maps(evlist, cpus, threads); | |
79 | ||
b39b8393 JO |
80 | CHECK__(parse_events(evlist, "dummy:u", NULL)); |
81 | CHECK__(parse_events(evlist, "cycles:u", NULL)); | |
395c3070 | 82 | |
e68ae9cf | 83 | perf_evlist__config(evlist, &opts, NULL); |
395c3070 AH |
84 | |
85 | evsel = perf_evlist__first(evlist); | |
86 | ||
87 | evsel->attr.comm = 1; | |
88 | evsel->attr.disabled = 1; | |
89 | evsel->attr.enable_on_exec = 0; | |
90 | ||
91 | if (perf_evlist__open(evlist) < 0) { | |
597bdeb4 WN |
92 | pr_debug("Unable to open dummy and cycles event\n"); |
93 | err = TEST_SKIP; | |
395c3070 AH |
94 | goto out_err; |
95 | } | |
96 | ||
97 | CHECK__(perf_evlist__mmap(evlist, UINT_MAX, false)); | |
98 | ||
99 | /* | |
100 | * First, test that a 'comm' event can be found when the event is | |
101 | * enabled. | |
102 | */ | |
103 | ||
104 | perf_evlist__enable(evlist); | |
105 | ||
106 | comm = "Test COMM 1"; | |
107 | CHECK__(prctl(PR_SET_NAME, (unsigned long)comm, 0, 0, 0)); | |
108 | ||
109 | perf_evlist__disable(evlist); | |
110 | ||
111 | found = find_comm(evlist, comm); | |
112 | if (found != 1) { | |
113 | pr_debug("First time, failed to find tracking event.\n"); | |
114 | goto out_err; | |
115 | } | |
116 | ||
117 | /* | |
118 | * Secondly, test that a 'comm' event can be found when the event is | |
119 | * disabled with the dummy event still enabled. | |
120 | */ | |
121 | ||
122 | perf_evlist__enable(evlist); | |
123 | ||
124 | evsel = perf_evlist__last(evlist); | |
125 | ||
d2190a80 | 126 | CHECK__(perf_evsel__disable(evsel)); |
395c3070 AH |
127 | |
128 | comm = "Test COMM 2"; | |
129 | CHECK__(prctl(PR_SET_NAME, (unsigned long)comm, 0, 0, 0)); | |
130 | ||
131 | perf_evlist__disable(evlist); | |
132 | ||
133 | found = find_comm(evlist, comm); | |
134 | if (found != 1) { | |
135 | pr_debug("Seconf time, failed to find tracking event.\n"); | |
136 | goto out_err; | |
137 | } | |
138 | ||
139 | err = 0; | |
140 | ||
141 | out_err: | |
142 | if (evlist) { | |
143 | perf_evlist__disable(evlist); | |
395c3070 | 144 | perf_evlist__delete(evlist); |
03ad9747 | 145 | } else { |
f30a79b0 | 146 | cpu_map__put(cpus); |
186fbb74 | 147 | thread_map__put(threads); |
03ad9747 | 148 | } |
395c3070 AH |
149 | |
150 | return err; | |
151 | } |