1 #include "perf.h" 2 #include "tests.h" 3 #include "debug.h" 4 #include "symbol.h" 5 #include "sort.h" 6 #include "evsel.h" 7 #include "evlist.h" 8 #include "machine.h" 9 #include "thread.h" 10 #include "parse-events.h" 11 #include "hists_common.h" 12 13 struct sample { 14 u32 pid; 15 u64 ip; 16 struct thread *thread; 17 struct map *map; 18 struct symbol *sym; 19 }; 20 21 /* For the numbers, see hists_common.c */ 22 static struct sample fake_common_samples[] = { 23 /* perf [kernel] schedule() */ 24 { .pid = FAKE_PID_PERF1, .ip = FAKE_IP_KERNEL_SCHEDULE, }, 25 /* perf [perf] main() */ 26 { .pid = FAKE_PID_PERF2, .ip = FAKE_IP_PERF_MAIN, }, 27 /* perf [perf] cmd_record() */ 28 { .pid = FAKE_PID_PERF2, .ip = FAKE_IP_PERF_CMD_RECORD, }, 29 /* bash [bash] xmalloc() */ 30 { .pid = FAKE_PID_BASH, .ip = FAKE_IP_BASH_XMALLOC, }, 31 /* bash [libc] malloc() */ 32 { .pid = FAKE_PID_BASH, .ip = FAKE_IP_LIBC_MALLOC, }, 33 }; 34 35 static struct sample fake_samples[][5] = { 36 { 37 /* perf [perf] run_command() */ 38 { .pid = FAKE_PID_PERF1, .ip = FAKE_IP_PERF_RUN_COMMAND, }, 39 /* perf [libc] malloc() */ 40 { .pid = FAKE_PID_PERF1, .ip = FAKE_IP_LIBC_MALLOC, }, 41 /* perf [kernel] page_fault() */ 42 { .pid = FAKE_PID_PERF1, .ip = FAKE_IP_KERNEL_PAGE_FAULT, }, 43 /* perf [kernel] sys_perf_event_open() */ 44 { .pid = FAKE_PID_PERF2, .ip = FAKE_IP_KERNEL_SYS_PERF_EVENT_OPEN, }, 45 /* bash [libc] free() */ 46 { .pid = FAKE_PID_BASH, .ip = FAKE_IP_LIBC_FREE, }, 47 }, 48 { 49 /* perf [libc] free() */ 50 { .pid = FAKE_PID_PERF2, .ip = FAKE_IP_LIBC_FREE, }, 51 /* bash [libc] malloc() */ 52 { .pid = FAKE_PID_BASH, .ip = FAKE_IP_LIBC_MALLOC, }, /* will be merged */ 53 /* bash [bash] xfee() */ 54 { .pid = FAKE_PID_BASH, .ip = FAKE_IP_BASH_XFREE, }, 55 /* bash [libc] realloc() */ 56 { .pid = FAKE_PID_BASH, .ip = FAKE_IP_LIBC_REALLOC, }, 57 /* bash [kernel] page_fault() */ 58 { .pid = FAKE_PID_BASH, .ip = FAKE_IP_KERNEL_PAGE_FAULT, }, 59 }, 60 }; 61 62 static int add_hist_entries(struct perf_evlist *evlist, struct machine *machine) 63 { 64 struct perf_evsel *evsel; 65 struct addr_location al; 66 struct hist_entry *he; 67 struct perf_sample sample = { .period = 1, .weight = 1, }; 68 size_t i = 0, k; 69 70 /* 71 * each evsel will have 10 samples - 5 common and 5 distinct. 72 * However the second evsel also has a collapsed entry for 73 * "bash [libc] malloc" so total 9 entries will be in the tree. 74 */ 75 evlist__for_each(evlist, evsel) { 76 struct hists *hists = evsel__hists(evsel); 77 78 for (k = 0; k < ARRAY_SIZE(fake_common_samples); k++) { 79 sample.cpumode = PERF_RECORD_MISC_USER; 80 sample.pid = fake_common_samples[k].pid; 81 sample.tid = fake_common_samples[k].pid; 82 sample.ip = fake_common_samples[k].ip; 83 84 if (machine__resolve(machine, &al, &sample) < 0) 85 goto out; 86 87 he = __hists__add_entry(hists, &al, NULL, 88 NULL, NULL, &sample, true); 89 if (he == NULL) { 90 addr_location__put(&al); 91 goto out; 92 } 93 94 fake_common_samples[k].thread = al.thread; 95 fake_common_samples[k].map = al.map; 96 fake_common_samples[k].sym = al.sym; 97 } 98 99 for (k = 0; k < ARRAY_SIZE(fake_samples[i]); k++) { 100 sample.pid = fake_samples[i][k].pid; 101 sample.tid = fake_samples[i][k].pid; 102 sample.ip = fake_samples[i][k].ip; 103 if (machine__resolve(machine, &al, &sample) < 0) 104 goto out; 105 106 he = __hists__add_entry(hists, &al, NULL, 107 NULL, NULL, &sample, true); 108 if (he == NULL) { 109 addr_location__put(&al); 110 goto out; 111 } 112 113 fake_samples[i][k].thread = al.thread; 114 fake_samples[i][k].map = al.map; 115 fake_samples[i][k].sym = al.sym; 116 } 117 i++; 118 } 119 120 return 0; 121 122 out: 123 pr_debug("Not enough memory for adding a hist entry\n"); 124 return -1; 125 } 126 127 static int find_sample(struct sample *samples, size_t nr_samples, 128 struct thread *t, struct map *m, struct symbol *s) 129 { 130 while (nr_samples--) { 131 if (samples->thread == t && samples->map == m && 132 samples->sym == s) 133 return 1; 134 samples++; 135 } 136 return 0; 137 } 138 139 static int __validate_match(struct hists *hists) 140 { 141 size_t count = 0; 142 struct rb_root *root; 143 struct rb_node *node; 144 145 /* 146 * Only entries from fake_common_samples should have a pair. 147 */ 148 if (hists__has(hists, need_collapse)) 149 root = &hists->entries_collapsed; 150 else 151 root = hists->entries_in; 152 153 node = rb_first(root); 154 while (node) { 155 struct hist_entry *he; 156 157 he = rb_entry(node, struct hist_entry, rb_node_in); 158 159 if (hist_entry__has_pairs(he)) { 160 if (find_sample(fake_common_samples, 161 ARRAY_SIZE(fake_common_samples), 162 he->thread, he->ms.map, he->ms.sym)) { 163 count++; 164 } else { 165 pr_debug("Can't find the matched entry\n"); 166 return -1; 167 } 168 } 169 170 node = rb_next(node); 171 } 172 173 if (count != ARRAY_SIZE(fake_common_samples)) { 174 pr_debug("Invalid count for matched entries: %zd of %zd\n", 175 count, ARRAY_SIZE(fake_common_samples)); 176 return -1; 177 } 178 179 return 0; 180 } 181 182 static int validate_match(struct hists *leader, struct hists *other) 183 { 184 return __validate_match(leader) || __validate_match(other); 185 } 186 187 static int __validate_link(struct hists *hists, int idx) 188 { 189 size_t count = 0; 190 size_t count_pair = 0; 191 size_t count_dummy = 0; 192 struct rb_root *root; 193 struct rb_node *node; 194 195 /* 196 * Leader hists (idx = 0) will have dummy entries from other, 197 * and some entries will have no pair. However every entry 198 * in other hists should have (dummy) pair. 199 */ 200 if (hists__has(hists, need_collapse)) 201 root = &hists->entries_collapsed; 202 else 203 root = hists->entries_in; 204 205 node = rb_first(root); 206 while (node) { 207 struct hist_entry *he; 208 209 he = rb_entry(node, struct hist_entry, rb_node_in); 210 211 if (hist_entry__has_pairs(he)) { 212 if (!find_sample(fake_common_samples, 213 ARRAY_SIZE(fake_common_samples), 214 he->thread, he->ms.map, he->ms.sym) && 215 !find_sample(fake_samples[idx], 216 ARRAY_SIZE(fake_samples[idx]), 217 he->thread, he->ms.map, he->ms.sym)) { 218 count_dummy++; 219 } 220 count_pair++; 221 } else if (idx) { 222 pr_debug("A entry from the other hists should have pair\n"); 223 return -1; 224 } 225 226 count++; 227 node = rb_next(node); 228 } 229 230 /* 231 * Note that we have a entry collapsed in the other (idx = 1) hists. 232 */ 233 if (idx == 0) { 234 if (count_dummy != ARRAY_SIZE(fake_samples[1]) - 1) { 235 pr_debug("Invalid count of dummy entries: %zd of %zd\n", 236 count_dummy, ARRAY_SIZE(fake_samples[1]) - 1); 237 return -1; 238 } 239 if (count != count_pair + ARRAY_SIZE(fake_samples[0])) { 240 pr_debug("Invalid count of total leader entries: %zd of %zd\n", 241 count, count_pair + ARRAY_SIZE(fake_samples[0])); 242 return -1; 243 } 244 } else { 245 if (count != count_pair) { 246 pr_debug("Invalid count of total other entries: %zd of %zd\n", 247 count, count_pair); 248 return -1; 249 } 250 if (count_dummy > 0) { 251 pr_debug("Other hists should not have dummy entries: %zd\n", 252 count_dummy); 253 return -1; 254 } 255 } 256 257 return 0; 258 } 259 260 static int validate_link(struct hists *leader, struct hists *other) 261 { 262 return __validate_link(leader, 0) || __validate_link(other, 1); 263 } 264 265 int test__hists_link(int subtest __maybe_unused) 266 { 267 int err = -1; 268 struct hists *hists, *first_hists; 269 struct machines machines; 270 struct machine *machine = NULL; 271 struct perf_evsel *evsel, *first; 272 struct perf_evlist *evlist = perf_evlist__new(); 273 274 if (evlist == NULL) 275 return -ENOMEM; 276 277 err = parse_events(evlist, "cpu-clock", NULL); 278 if (err) 279 goto out; 280 err = parse_events(evlist, "task-clock", NULL); 281 if (err) 282 goto out; 283 284 err = TEST_FAIL; 285 /* default sort order (comm,dso,sym) will be used */ 286 if (setup_sorting(NULL) < 0) 287 goto out; 288 289 machines__init(&machines); 290 291 /* setup threads/dso/map/symbols also */ 292 machine = setup_fake_machine(&machines); 293 if (!machine) 294 goto out; 295 296 if (verbose > 1) 297 machine__fprintf(machine, stderr); 298 299 /* process sample events */ 300 err = add_hist_entries(evlist, machine); 301 if (err < 0) 302 goto out; 303 304 evlist__for_each(evlist, evsel) { 305 hists = evsel__hists(evsel); 306 hists__collapse_resort(hists, NULL); 307 308 if (verbose > 2) 309 print_hists_in(hists); 310 } 311 312 first = perf_evlist__first(evlist); 313 evsel = perf_evlist__last(evlist); 314 315 first_hists = evsel__hists(first); 316 hists = evsel__hists(evsel); 317 318 /* match common entries */ 319 hists__match(first_hists, hists); 320 err = validate_match(first_hists, hists); 321 if (err) 322 goto out; 323 324 /* link common and/or dummy entries */ 325 hists__link(first_hists, hists); 326 err = validate_link(first_hists, hists); 327 if (err) 328 goto out; 329 330 err = 0; 331 332 out: 333 /* tear down everything */ 334 perf_evlist__delete(evlist); 335 reset_output_field(); 336 machines__exit(&machines); 337 338 return err; 339 } 340