Greg Kroah-Hartman | b244131 | 2017-11-01 15:07:57 +0100 | [diff] [blame] | 1 | // SPDX-License-Identifier: GPL-2.0 |
Arnaldo Carvalho de Melo | fd20e81 | 2017-04-17 15:23:08 -0300 | [diff] [blame] | 2 | #include <inttypes.h> |
Jiri Olsa | 4e85edf | 2014-03-05 17:20:31 +0100 | [diff] [blame] | 3 | #include <unistd.h> |
| 4 | #include <sys/syscall.h> |
| 5 | #include <sys/types.h> |
| 6 | #include <sys/mman.h> |
| 7 | #include <pthread.h> |
| 8 | #include <stdlib.h> |
| 9 | #include <stdio.h> |
| 10 | #include "debug.h" |
Arnaldo Carvalho de Melo | ea49e01 | 2019-09-18 11:36:13 -0300 | [diff] [blame] | 11 | #include "event.h" |
Jiri Olsa | 4e85edf | 2014-03-05 17:20:31 +0100 | [diff] [blame] | 12 | #include "tests.h" |
| 13 | #include "machine.h" |
| 14 | #include "thread_map.h" |
Arnaldo Carvalho de Melo | 1101f69 | 2019-01-27 13:42:37 +0100 | [diff] [blame] | 15 | #include "map.h" |
Jiri Olsa | 4e85edf | 2014-03-05 17:20:31 +0100 | [diff] [blame] | 16 | #include "symbol.h" |
Arnaldo Carvalho de Melo | ea49e01 | 2019-09-18 11:36:13 -0300 | [diff] [blame] | 17 | #include "util/synthetic-events.h" |
Jiri Olsa | 4e85edf | 2014-03-05 17:20:31 +0100 | [diff] [blame] | 18 | #include "thread.h" |
Jiri Olsa | 20f2be1 | 2019-08-06 15:25:25 +0200 | [diff] [blame] | 19 | #include <internal/lib.h> // page_size |
Jiri Olsa | 4e85edf | 2014-03-05 17:20:31 +0100 | [diff] [blame] | 20 | |
| 21 | #define THREADS 4 |
| 22 | |
| 23 | static int go_away; |
| 24 | |
| 25 | struct thread_data { |
| 26 | pthread_t pt; |
| 27 | pid_t tid; |
| 28 | void *map; |
| 29 | int ready[2]; |
| 30 | }; |
| 31 | |
| 32 | static struct thread_data threads[THREADS]; |
| 33 | |
| 34 | static int thread_init(struct thread_data *td) |
| 35 | { |
| 36 | void *map; |
| 37 | |
| 38 | map = mmap(NULL, page_size, |
| 39 | PROT_READ|PROT_WRITE|PROT_EXEC, |
| 40 | MAP_SHARED|MAP_ANONYMOUS, -1, 0); |
| 41 | |
| 42 | if (map == MAP_FAILED) { |
| 43 | perror("mmap failed"); |
| 44 | return -1; |
| 45 | } |
| 46 | |
| 47 | td->map = map; |
| 48 | td->tid = syscall(SYS_gettid); |
| 49 | |
| 50 | pr_debug("tid = %d, map = %p\n", td->tid, map); |
| 51 | return 0; |
| 52 | } |
| 53 | |
| 54 | static void *thread_fn(void *arg) |
| 55 | { |
| 56 | struct thread_data *td = arg; |
| 57 | ssize_t ret; |
Numfor Mbiziwo-Tiapo | 4e4cf62 | 2019-07-02 10:37:15 -0700 | [diff] [blame] | 58 | int go = 0; |
Jiri Olsa | 4e85edf | 2014-03-05 17:20:31 +0100 | [diff] [blame] | 59 | |
| 60 | if (thread_init(td)) |
| 61 | return NULL; |
| 62 | |
| 63 | /* Signal thread_create thread is initialized. */ |
| 64 | ret = write(td->ready[1], &go, sizeof(int)); |
| 65 | if (ret != sizeof(int)) { |
| 66 | pr_err("failed to notify\n"); |
| 67 | return NULL; |
| 68 | } |
| 69 | |
| 70 | while (!go_away) { |
| 71 | /* Waiting for main thread to kill us. */ |
| 72 | usleep(100); |
| 73 | } |
| 74 | |
| 75 | munmap(td->map, page_size); |
| 76 | return NULL; |
| 77 | } |
| 78 | |
| 79 | static int thread_create(int i) |
| 80 | { |
| 81 | struct thread_data *td = &threads[i]; |
| 82 | int err, go; |
| 83 | |
| 84 | if (pipe(td->ready)) |
| 85 | return -1; |
| 86 | |
| 87 | err = pthread_create(&td->pt, NULL, thread_fn, td); |
| 88 | if (!err) { |
| 89 | /* Wait for thread initialization. */ |
| 90 | ssize_t ret = read(td->ready[0], &go, sizeof(int)); |
| 91 | err = ret != sizeof(int); |
| 92 | } |
| 93 | |
| 94 | close(td->ready[0]); |
| 95 | close(td->ready[1]); |
| 96 | return err; |
| 97 | } |
| 98 | |
| 99 | static int threads_create(void) |
| 100 | { |
| 101 | struct thread_data *td0 = &threads[0]; |
| 102 | int i, err = 0; |
| 103 | |
| 104 | go_away = 0; |
| 105 | |
| 106 | /* 0 is main thread */ |
| 107 | if (thread_init(td0)) |
| 108 | return -1; |
| 109 | |
| 110 | for (i = 1; !err && i < THREADS; i++) |
| 111 | err = thread_create(i); |
| 112 | |
| 113 | return err; |
| 114 | } |
| 115 | |
| 116 | static int threads_destroy(void) |
| 117 | { |
| 118 | struct thread_data *td0 = &threads[0]; |
| 119 | int i, err = 0; |
| 120 | |
| 121 | /* cleanup the main thread */ |
| 122 | munmap(td0->map, page_size); |
| 123 | |
| 124 | go_away = 1; |
| 125 | |
| 126 | for (i = 1; !err && i < THREADS; i++) |
| 127 | err = pthread_join(threads[i].pt, NULL); |
| 128 | |
| 129 | return err; |
| 130 | } |
| 131 | |
| 132 | typedef int (*synth_cb)(struct machine *machine); |
| 133 | |
| 134 | static int synth_all(struct machine *machine) |
| 135 | { |
| 136 | return perf_event__synthesize_threads(NULL, |
| 137 | perf_event__process, |
Namhyung Kim | 84111b9 | 2021-08-10 21:46:57 -0700 | [diff] [blame] | 138 | machine, 1, 0, 1); |
Jiri Olsa | 4e85edf | 2014-03-05 17:20:31 +0100 | [diff] [blame] | 139 | } |
| 140 | |
| 141 | static int synth_process(struct machine *machine) |
| 142 | { |
Jiri Olsa | 9749b90 | 2019-07-21 13:23:50 +0200 | [diff] [blame] | 143 | struct perf_thread_map *map; |
Jiri Olsa | 4e85edf | 2014-03-05 17:20:31 +0100 | [diff] [blame] | 144 | int err; |
| 145 | |
| 146 | map = thread_map__new_by_pid(getpid()); |
| 147 | |
| 148 | err = perf_event__synthesize_thread_map(NULL, map, |
| 149 | perf_event__process, |
Namhyung Kim | 84111b9 | 2021-08-10 21:46:57 -0700 | [diff] [blame] | 150 | machine, 1, 0); |
Jiri Olsa | 4e85edf | 2014-03-05 17:20:31 +0100 | [diff] [blame] | 151 | |
Jiri Olsa | 7836e52 | 2019-07-21 13:24:20 +0200 | [diff] [blame] | 152 | perf_thread_map__put(map); |
Jiri Olsa | 4e85edf | 2014-03-05 17:20:31 +0100 | [diff] [blame] | 153 | return err; |
| 154 | } |
| 155 | |
| 156 | static int mmap_events(synth_cb synth) |
| 157 | { |
Jiri Olsa | 4e85edf | 2014-03-05 17:20:31 +0100 | [diff] [blame] | 158 | struct machine *machine; |
| 159 | int err, i; |
| 160 | |
| 161 | /* |
| 162 | * The threads_create will not return before all threads |
| 163 | * are spawned and all created memory map. |
| 164 | * |
| 165 | * They will loop until threads_destroy is called, so we |
| 166 | * can safely run synthesizing function. |
| 167 | */ |
| 168 | TEST_ASSERT_VAL("failed to create threads", !threads_create()); |
| 169 | |
Jiri Olsa | 0468479 | 2015-12-03 09:34:13 +0100 | [diff] [blame] | 170 | machine = machine__new_host(); |
Jiri Olsa | 4e85edf | 2014-03-05 17:20:31 +0100 | [diff] [blame] | 171 | |
| 172 | dump_trace = verbose > 1 ? 1 : 0; |
| 173 | |
| 174 | err = synth(machine); |
| 175 | |
| 176 | dump_trace = 0; |
| 177 | |
| 178 | TEST_ASSERT_VAL("failed to destroy threads", !threads_destroy()); |
| 179 | TEST_ASSERT_VAL("failed to synthesize maps", !err); |
| 180 | |
| 181 | /* |
| 182 | * All data is synthesized, try to find map for each |
| 183 | * thread object. |
| 184 | */ |
| 185 | for (i = 0; i < THREADS; i++) { |
| 186 | struct thread_data *td = &threads[i]; |
| 187 | struct addr_location al; |
| 188 | struct thread *thread; |
| 189 | |
Ian Rogers | 0dd5041 | 2023-06-08 16:28:03 -0700 | [diff] [blame] | 190 | addr_location__init(&al); |
Jiri Olsa | 4e85edf | 2014-03-05 17:20:31 +0100 | [diff] [blame] | 191 | thread = machine__findnew_thread(machine, getpid(), td->tid); |
| 192 | |
| 193 | pr_debug("looking for map %p\n", td->map); |
| 194 | |
Arnaldo Carvalho de Melo | f07a2d3 | 2018-04-24 10:49:50 -0300 | [diff] [blame] | 195 | thread__find_map(thread, PERF_RECORD_MISC_USER, |
| 196 | (unsigned long) (td->map + 1), &al); |
Jiri Olsa | 4e85edf | 2014-03-05 17:20:31 +0100 | [diff] [blame] | 197 | |
Arnaldo Carvalho de Melo | b91fc39 | 2015-04-06 20:43:22 -0300 | [diff] [blame] | 198 | thread__put(thread); |
| 199 | |
Jiri Olsa | 4e85edf | 2014-03-05 17:20:31 +0100 | [diff] [blame] | 200 | if (!al.map) { |
| 201 | pr_debug("failed, couldn't find map\n"); |
| 202 | err = -1; |
Ian Rogers | 0dd5041 | 2023-06-08 16:28:03 -0700 | [diff] [blame] | 203 | addr_location__exit(&al); |
Jiri Olsa | 4e85edf | 2014-03-05 17:20:31 +0100 | [diff] [blame] | 204 | break; |
| 205 | } |
| 206 | |
Ian Rogers | e5116f4 | 2023-03-20 14:22:36 -0700 | [diff] [blame] | 207 | pr_debug("map %p, addr %" PRIx64 "\n", al.map, map__start(al.map)); |
Ian Rogers | 0dd5041 | 2023-06-08 16:28:03 -0700 | [diff] [blame] | 208 | addr_location__exit(&al); |
Jiri Olsa | 4e85edf | 2014-03-05 17:20:31 +0100 | [diff] [blame] | 209 | } |
| 210 | |
Jiri Olsa | 0468479 | 2015-12-03 09:34:13 +0100 | [diff] [blame] | 211 | machine__delete(machine); |
Jiri Olsa | 4e85edf | 2014-03-05 17:20:31 +0100 | [diff] [blame] | 212 | return err; |
| 213 | } |
| 214 | |
| 215 | /* |
| 216 | * This test creates 'THREADS' number of threads (including |
| 217 | * main thread) and each thread creates memory map. |
| 218 | * |
| 219 | * When threads are created, we synthesize them with both |
| 220 | * (separate tests): |
| 221 | * perf_event__synthesize_thread_map (process based) |
| 222 | * perf_event__synthesize_threads (global) |
| 223 | * |
| 224 | * We test we can find all memory maps via: |
Arnaldo Carvalho de Melo | f07a2d3 | 2018-04-24 10:49:50 -0300 | [diff] [blame] | 225 | * thread__find_map |
Jiri Olsa | 4e85edf | 2014-03-05 17:20:31 +0100 | [diff] [blame] | 226 | * |
| 227 | * by using all thread objects. |
| 228 | */ |
Ian Rogers | 33f44bf | 2021-11-03 23:41:51 -0700 | [diff] [blame] | 229 | static int test__mmap_thread_lookup(struct test_suite *test __maybe_unused, int subtest __maybe_unused) |
Jiri Olsa | 4e85edf | 2014-03-05 17:20:31 +0100 | [diff] [blame] | 230 | { |
| 231 | /* perf_event__synthesize_threads synthesize */ |
| 232 | TEST_ASSERT_VAL("failed with sythesizing all", |
| 233 | !mmap_events(synth_all)); |
| 234 | |
| 235 | /* perf_event__synthesize_thread_map synthesize */ |
| 236 | TEST_ASSERT_VAL("failed with sythesizing process", |
| 237 | !mmap_events(synth_process)); |
| 238 | |
| 239 | return 0; |
| 240 | } |
Ian Rogers | d68f036 | 2021-11-03 23:41:50 -0700 | [diff] [blame] | 241 | |
| 242 | DEFINE_SUITE("Lookup mmap thread", mmap_thread_lookup); |