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 | */ | |
52 | int test__keep_tracking(void) | |
53 | { | |
b4006796 | 54 | struct record_opts opts = { |
395c3070 AH |
55 | .mmap_pages = UINT_MAX, |
56 | .user_freq = UINT_MAX, | |
57 | .user_interval = ULLONG_MAX, | |
58 | .freq = 4000, | |
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 AH |
83 | |
84 | perf_evlist__config(evlist, &opts); | |
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) { | |
93 | fprintf(stderr, " (not supported)"); | |
94 | err = 0; | |
95 | goto out_err; | |
96 | } | |
97 | ||
98 | CHECK__(perf_evlist__mmap(evlist, UINT_MAX, false)); | |
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 | ||
127 | CHECK__(perf_evlist__disable_event(evlist, evsel)); | |
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 { |
395c3070 | 147 | cpu_map__delete(cpus); |
395c3070 | 148 | thread_map__delete(threads); |
03ad9747 | 149 | } |
395c3070 AH |
150 | |
151 | return err; | |
152 | } |