Borislav Petkov | d944c4e | 2014-04-25 21:31:02 +0200 | [diff] [blame] | 1 | #include <linux/types.h> |
Adrian Hunter | 395c307 | 2013-08-31 21:50:53 +0300 | [diff] [blame] | 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; |
Zhouyi Zhou | 8e50d38 | 2013-10-24 15:43:33 +0800 | [diff] [blame] | 39 | perf_evlist__mmap_consume(evlist, i); |
Adrian Hunter | 395c307 | 2013-08-31 21:50:53 +0300 | [diff] [blame] | 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 | { |
Arnaldo Carvalho de Melo | b400679 | 2013-12-19 14:43:45 -0300 | [diff] [blame] | 54 | struct record_opts opts = { |
Adrian Hunter | 395c307 | 2013-08-31 21:50:53 +0300 | [diff] [blame] | 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 | |
Jiri Olsa | b39b839 | 2015-04-22 21:10:16 +0200 | [diff] [blame] | 81 | CHECK__(parse_events(evlist, "dummy:u", NULL)); |
| 82 | CHECK__(parse_events(evlist, "cycles:u", NULL)); |
Adrian Hunter | 395c307 | 2013-08-31 21:50:53 +0300 | [diff] [blame] | 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); |
Adrian Hunter | 395c307 | 2013-08-31 21:50:53 +0300 | [diff] [blame] | 145 | perf_evlist__delete(evlist); |
Arnaldo Carvalho de Melo | 03ad974 | 2014-01-03 15:56:06 -0300 | [diff] [blame] | 146 | } else { |
Jiri Olsa | f30a79b | 2015-06-23 00:36:04 +0200 | [diff] [blame] | 147 | cpu_map__put(cpus); |
Jiri Olsa | 186fbb7 | 2015-06-23 00:36:05 +0200 | [diff] [blame^] | 148 | thread_map__put(threads); |
Arnaldo Carvalho de Melo | 03ad974 | 2014-01-03 15:56:06 -0300 | [diff] [blame] | 149 | } |
Adrian Hunter | 395c307 | 2013-08-31 21:50:53 +0300 | [diff] [blame] | 150 | |
| 151 | return err; |
| 152 | } |