Arnaldo Carvalho de Melo | 3f067dc | 2012-12-07 17:39:39 -0300 | [diff] [blame] | 1 | #include "callchain.h" |
Arnaldo Carvalho de Melo | b0a7d1a | 2012-10-06 16:26:02 -0300 | [diff] [blame] | 2 | #include "debug.h" |
| 3 | #include "event.h" |
Arnaldo Carvalho de Melo | 3f067dc | 2012-12-07 17:39:39 -0300 | [diff] [blame] | 4 | #include "evsel.h" |
| 5 | #include "hist.h" |
Arnaldo Carvalho de Melo | 9d2f8e2 | 2012-10-06 15:43:20 -0300 | [diff] [blame] | 6 | #include "machine.h" |
| 7 | #include "map.h" |
Arnaldo Carvalho de Melo | 3f067dc | 2012-12-07 17:39:39 -0300 | [diff] [blame] | 8 | #include "sort.h" |
Arnaldo Carvalho de Melo | 69d2591 | 2012-11-09 11:32:52 -0300 | [diff] [blame] | 9 | #include "strlist.h" |
Arnaldo Carvalho de Melo | 9d2f8e2 | 2012-10-06 15:43:20 -0300 | [diff] [blame] | 10 | #include "thread.h" |
| 11 | #include <stdbool.h> |
Arnaldo Carvalho de Melo | 3f067dc | 2012-12-07 17:39:39 -0300 | [diff] [blame] | 12 | #include "unwind.h" |
Arnaldo Carvalho de Melo | 9d2f8e2 | 2012-10-06 15:43:20 -0300 | [diff] [blame] | 13 | |
Arnaldo Carvalho de Melo | 69d2591 | 2012-11-09 11:32:52 -0300 | [diff] [blame] | 14 | int machine__init(struct machine *machine, const char *root_dir, pid_t pid) |
| 15 | { |
| 16 | map_groups__init(&machine->kmaps); |
| 17 | RB_CLEAR_NODE(&machine->rb_node); |
| 18 | INIT_LIST_HEAD(&machine->user_dsos); |
| 19 | INIT_LIST_HEAD(&machine->kernel_dsos); |
| 20 | |
| 21 | machine->threads = RB_ROOT; |
| 22 | INIT_LIST_HEAD(&machine->dead_threads); |
| 23 | machine->last_match = NULL; |
| 24 | |
| 25 | machine->kmaps.machine = machine; |
| 26 | machine->pid = pid; |
| 27 | |
| 28 | machine->root_dir = strdup(root_dir); |
| 29 | if (machine->root_dir == NULL) |
| 30 | return -ENOMEM; |
| 31 | |
| 32 | if (pid != HOST_KERNEL_ID) { |
| 33 | struct thread *thread = machine__findnew_thread(machine, pid); |
| 34 | char comm[64]; |
| 35 | |
| 36 | if (thread == NULL) |
| 37 | return -ENOMEM; |
| 38 | |
| 39 | snprintf(comm, sizeof(comm), "[guest/%d]", pid); |
| 40 | thread__set_comm(thread, comm); |
| 41 | } |
| 42 | |
| 43 | return 0; |
| 44 | } |
| 45 | |
| 46 | static void dsos__delete(struct list_head *dsos) |
| 47 | { |
| 48 | struct dso *pos, *n; |
| 49 | |
| 50 | list_for_each_entry_safe(pos, n, dsos, node) { |
| 51 | list_del(&pos->node); |
| 52 | dso__delete(pos); |
| 53 | } |
| 54 | } |
| 55 | |
Arnaldo Carvalho de Melo | 3f067dc | 2012-12-07 17:39:39 -0300 | [diff] [blame] | 56 | void machine__delete_dead_threads(struct machine *machine) |
| 57 | { |
| 58 | struct thread *n, *t; |
| 59 | |
| 60 | list_for_each_entry_safe(t, n, &machine->dead_threads, node) { |
| 61 | list_del(&t->node); |
| 62 | thread__delete(t); |
| 63 | } |
| 64 | } |
| 65 | |
| 66 | void machine__delete_threads(struct machine *machine) |
| 67 | { |
| 68 | struct rb_node *nd = rb_first(&machine->threads); |
| 69 | |
| 70 | while (nd) { |
| 71 | struct thread *t = rb_entry(nd, struct thread, rb_node); |
| 72 | |
| 73 | rb_erase(&t->rb_node, &machine->threads); |
| 74 | nd = rb_next(nd); |
| 75 | thread__delete(t); |
| 76 | } |
| 77 | } |
| 78 | |
Arnaldo Carvalho de Melo | 69d2591 | 2012-11-09 11:32:52 -0300 | [diff] [blame] | 79 | void machine__exit(struct machine *machine) |
| 80 | { |
| 81 | map_groups__exit(&machine->kmaps); |
| 82 | dsos__delete(&machine->user_dsos); |
| 83 | dsos__delete(&machine->kernel_dsos); |
| 84 | free(machine->root_dir); |
| 85 | machine->root_dir = NULL; |
| 86 | } |
| 87 | |
| 88 | void machine__delete(struct machine *machine) |
| 89 | { |
| 90 | machine__exit(machine); |
| 91 | free(machine); |
| 92 | } |
| 93 | |
Arnaldo Carvalho de Melo | 876650e | 2012-12-18 19:15:48 -0300 | [diff] [blame] | 94 | void machines__init(struct machines *machines) |
| 95 | { |
| 96 | machine__init(&machines->host, "", HOST_KERNEL_ID); |
| 97 | machines->guests = RB_ROOT; |
| 98 | } |
| 99 | |
| 100 | void machines__exit(struct machines *machines) |
| 101 | { |
| 102 | machine__exit(&machines->host); |
| 103 | /* XXX exit guest */ |
| 104 | } |
| 105 | |
| 106 | struct machine *machines__add(struct machines *machines, pid_t pid, |
Arnaldo Carvalho de Melo | 69d2591 | 2012-11-09 11:32:52 -0300 | [diff] [blame] | 107 | const char *root_dir) |
| 108 | { |
Arnaldo Carvalho de Melo | 876650e | 2012-12-18 19:15:48 -0300 | [diff] [blame] | 109 | struct rb_node **p = &machines->guests.rb_node; |
Arnaldo Carvalho de Melo | 69d2591 | 2012-11-09 11:32:52 -0300 | [diff] [blame] | 110 | struct rb_node *parent = NULL; |
| 111 | struct machine *pos, *machine = malloc(sizeof(*machine)); |
| 112 | |
| 113 | if (machine == NULL) |
| 114 | return NULL; |
| 115 | |
| 116 | if (machine__init(machine, root_dir, pid) != 0) { |
| 117 | free(machine); |
| 118 | return NULL; |
| 119 | } |
| 120 | |
| 121 | while (*p != NULL) { |
| 122 | parent = *p; |
| 123 | pos = rb_entry(parent, struct machine, rb_node); |
| 124 | if (pid < pos->pid) |
| 125 | p = &(*p)->rb_left; |
| 126 | else |
| 127 | p = &(*p)->rb_right; |
| 128 | } |
| 129 | |
| 130 | rb_link_node(&machine->rb_node, parent, p); |
Arnaldo Carvalho de Melo | 876650e | 2012-12-18 19:15:48 -0300 | [diff] [blame] | 131 | rb_insert_color(&machine->rb_node, &machines->guests); |
Arnaldo Carvalho de Melo | 69d2591 | 2012-11-09 11:32:52 -0300 | [diff] [blame] | 132 | |
| 133 | return machine; |
| 134 | } |
| 135 | |
Arnaldo Carvalho de Melo | 876650e | 2012-12-18 19:15:48 -0300 | [diff] [blame] | 136 | struct machine *machines__find(struct machines *machines, pid_t pid) |
Arnaldo Carvalho de Melo | 69d2591 | 2012-11-09 11:32:52 -0300 | [diff] [blame] | 137 | { |
Arnaldo Carvalho de Melo | 876650e | 2012-12-18 19:15:48 -0300 | [diff] [blame] | 138 | struct rb_node **p = &machines->guests.rb_node; |
Arnaldo Carvalho de Melo | 69d2591 | 2012-11-09 11:32:52 -0300 | [diff] [blame] | 139 | struct rb_node *parent = NULL; |
| 140 | struct machine *machine; |
| 141 | struct machine *default_machine = NULL; |
| 142 | |
Arnaldo Carvalho de Melo | 876650e | 2012-12-18 19:15:48 -0300 | [diff] [blame] | 143 | if (pid == HOST_KERNEL_ID) |
| 144 | return &machines->host; |
| 145 | |
Arnaldo Carvalho de Melo | 69d2591 | 2012-11-09 11:32:52 -0300 | [diff] [blame] | 146 | while (*p != NULL) { |
| 147 | parent = *p; |
| 148 | machine = rb_entry(parent, struct machine, rb_node); |
| 149 | if (pid < machine->pid) |
| 150 | p = &(*p)->rb_left; |
| 151 | else if (pid > machine->pid) |
| 152 | p = &(*p)->rb_right; |
| 153 | else |
| 154 | return machine; |
| 155 | if (!machine->pid) |
| 156 | default_machine = machine; |
| 157 | } |
| 158 | |
| 159 | return default_machine; |
| 160 | } |
| 161 | |
Arnaldo Carvalho de Melo | 876650e | 2012-12-18 19:15:48 -0300 | [diff] [blame] | 162 | struct machine *machines__findnew(struct machines *machines, pid_t pid) |
Arnaldo Carvalho de Melo | 69d2591 | 2012-11-09 11:32:52 -0300 | [diff] [blame] | 163 | { |
| 164 | char path[PATH_MAX]; |
| 165 | const char *root_dir = ""; |
| 166 | struct machine *machine = machines__find(machines, pid); |
| 167 | |
| 168 | if (machine && (machine->pid == pid)) |
| 169 | goto out; |
| 170 | |
| 171 | if ((pid != HOST_KERNEL_ID) && |
| 172 | (pid != DEFAULT_GUEST_KERNEL_ID) && |
| 173 | (symbol_conf.guestmount)) { |
| 174 | sprintf(path, "%s/%d", symbol_conf.guestmount, pid); |
| 175 | if (access(path, R_OK)) { |
| 176 | static struct strlist *seen; |
| 177 | |
| 178 | if (!seen) |
| 179 | seen = strlist__new(true, NULL); |
| 180 | |
| 181 | if (!strlist__has_entry(seen, path)) { |
| 182 | pr_err("Can't access file %s\n", path); |
| 183 | strlist__add(seen, path); |
| 184 | } |
| 185 | machine = NULL; |
| 186 | goto out; |
| 187 | } |
| 188 | root_dir = path; |
| 189 | } |
| 190 | |
| 191 | machine = machines__add(machines, pid, root_dir); |
| 192 | out: |
| 193 | return machine; |
| 194 | } |
| 195 | |
Arnaldo Carvalho de Melo | 876650e | 2012-12-18 19:15:48 -0300 | [diff] [blame] | 196 | void machines__process_guests(struct machines *machines, |
| 197 | machine__process_t process, void *data) |
Arnaldo Carvalho de Melo | 69d2591 | 2012-11-09 11:32:52 -0300 | [diff] [blame] | 198 | { |
| 199 | struct rb_node *nd; |
| 200 | |
Arnaldo Carvalho de Melo | 876650e | 2012-12-18 19:15:48 -0300 | [diff] [blame] | 201 | for (nd = rb_first(&machines->guests); nd; nd = rb_next(nd)) { |
Arnaldo Carvalho de Melo | 69d2591 | 2012-11-09 11:32:52 -0300 | [diff] [blame] | 202 | struct machine *pos = rb_entry(nd, struct machine, rb_node); |
| 203 | process(pos, data); |
| 204 | } |
| 205 | } |
| 206 | |
| 207 | char *machine__mmap_name(struct machine *machine, char *bf, size_t size) |
| 208 | { |
| 209 | if (machine__is_host(machine)) |
| 210 | snprintf(bf, size, "[%s]", "kernel.kallsyms"); |
| 211 | else if (machine__is_default_guest(machine)) |
| 212 | snprintf(bf, size, "[%s]", "guest.kernel.kallsyms"); |
| 213 | else { |
| 214 | snprintf(bf, size, "[%s.%d]", "guest.kernel.kallsyms", |
| 215 | machine->pid); |
| 216 | } |
| 217 | |
| 218 | return bf; |
| 219 | } |
| 220 | |
Arnaldo Carvalho de Melo | 876650e | 2012-12-18 19:15:48 -0300 | [diff] [blame] | 221 | void machines__set_id_hdr_size(struct machines *machines, u16 id_hdr_size) |
Arnaldo Carvalho de Melo | 69d2591 | 2012-11-09 11:32:52 -0300 | [diff] [blame] | 222 | { |
| 223 | struct rb_node *node; |
| 224 | struct machine *machine; |
| 225 | |
Arnaldo Carvalho de Melo | 876650e | 2012-12-18 19:15:48 -0300 | [diff] [blame] | 226 | machines->host.id_hdr_size = id_hdr_size; |
| 227 | |
| 228 | for (node = rb_first(&machines->guests); node; node = rb_next(node)) { |
Arnaldo Carvalho de Melo | 69d2591 | 2012-11-09 11:32:52 -0300 | [diff] [blame] | 229 | machine = rb_entry(node, struct machine, rb_node); |
| 230 | machine->id_hdr_size = id_hdr_size; |
| 231 | } |
| 232 | |
| 233 | return; |
| 234 | } |
| 235 | |
Arnaldo Carvalho de Melo | 9d2f8e2 | 2012-10-06 15:43:20 -0300 | [diff] [blame] | 236 | static struct thread *__machine__findnew_thread(struct machine *machine, pid_t pid, |
| 237 | bool create) |
| 238 | { |
| 239 | struct rb_node **p = &machine->threads.rb_node; |
| 240 | struct rb_node *parent = NULL; |
| 241 | struct thread *th; |
| 242 | |
| 243 | /* |
| 244 | * Font-end cache - PID lookups come in blocks, |
| 245 | * so most of the time we dont have to look up |
| 246 | * the full rbtree: |
| 247 | */ |
| 248 | if (machine->last_match && machine->last_match->pid == pid) |
| 249 | return machine->last_match; |
| 250 | |
| 251 | while (*p != NULL) { |
| 252 | parent = *p; |
| 253 | th = rb_entry(parent, struct thread, rb_node); |
| 254 | |
| 255 | if (th->pid == pid) { |
| 256 | machine->last_match = th; |
| 257 | return th; |
| 258 | } |
| 259 | |
| 260 | if (pid < th->pid) |
| 261 | p = &(*p)->rb_left; |
| 262 | else |
| 263 | p = &(*p)->rb_right; |
| 264 | } |
| 265 | |
| 266 | if (!create) |
| 267 | return NULL; |
| 268 | |
| 269 | th = thread__new(pid); |
| 270 | if (th != NULL) { |
| 271 | rb_link_node(&th->rb_node, parent, p); |
| 272 | rb_insert_color(&th->rb_node, &machine->threads); |
| 273 | machine->last_match = th; |
| 274 | } |
| 275 | |
| 276 | return th; |
| 277 | } |
| 278 | |
| 279 | struct thread *machine__findnew_thread(struct machine *machine, pid_t pid) |
| 280 | { |
| 281 | return __machine__findnew_thread(machine, pid, true); |
| 282 | } |
| 283 | |
| 284 | struct thread *machine__find_thread(struct machine *machine, pid_t pid) |
| 285 | { |
| 286 | return __machine__findnew_thread(machine, pid, false); |
| 287 | } |
Arnaldo Carvalho de Melo | b0a7d1a | 2012-10-06 16:26:02 -0300 | [diff] [blame] | 288 | |
| 289 | int machine__process_comm_event(struct machine *machine, union perf_event *event) |
| 290 | { |
| 291 | struct thread *thread = machine__findnew_thread(machine, event->comm.tid); |
| 292 | |
| 293 | if (dump_trace) |
| 294 | perf_event__fprintf_comm(event, stdout); |
| 295 | |
| 296 | if (thread == NULL || thread__set_comm(thread, event->comm.comm)) { |
| 297 | dump_printf("problem processing PERF_RECORD_COMM, skipping event.\n"); |
| 298 | return -1; |
| 299 | } |
| 300 | |
| 301 | return 0; |
| 302 | } |
| 303 | |
| 304 | int machine__process_lost_event(struct machine *machine __maybe_unused, |
| 305 | union perf_event *event) |
| 306 | { |
| 307 | dump_printf(": id:%" PRIu64 ": lost:%" PRIu64 "\n", |
| 308 | event->lost.id, event->lost.lost); |
| 309 | return 0; |
| 310 | } |
| 311 | |
Arnaldo Carvalho de Melo | 3f067dc | 2012-12-07 17:39:39 -0300 | [diff] [blame] | 312 | struct map *machine__new_module(struct machine *machine, u64 start, |
| 313 | const char *filename) |
| 314 | { |
| 315 | struct map *map; |
| 316 | struct dso *dso = __dsos__findnew(&machine->kernel_dsos, filename); |
| 317 | |
| 318 | if (dso == NULL) |
| 319 | return NULL; |
| 320 | |
| 321 | map = map__new2(start, dso, MAP__FUNCTION); |
| 322 | if (map == NULL) |
| 323 | return NULL; |
| 324 | |
| 325 | if (machine__is_host(machine)) |
| 326 | dso->symtab_type = DSO_BINARY_TYPE__SYSTEM_PATH_KMODULE; |
| 327 | else |
| 328 | dso->symtab_type = DSO_BINARY_TYPE__GUEST_KMODULE; |
| 329 | map_groups__insert(&machine->kmaps, map); |
| 330 | return map; |
| 331 | } |
| 332 | |
Arnaldo Carvalho de Melo | 876650e | 2012-12-18 19:15:48 -0300 | [diff] [blame] | 333 | size_t machines__fprintf_dsos(struct machines *machines, FILE *fp) |
Arnaldo Carvalho de Melo | 3f067dc | 2012-12-07 17:39:39 -0300 | [diff] [blame] | 334 | { |
| 335 | struct rb_node *nd; |
Arnaldo Carvalho de Melo | 876650e | 2012-12-18 19:15:48 -0300 | [diff] [blame] | 336 | size_t ret = __dsos__fprintf(&machines->host.kernel_dsos, fp) + |
| 337 | __dsos__fprintf(&machines->host.user_dsos, fp); |
Arnaldo Carvalho de Melo | 3f067dc | 2012-12-07 17:39:39 -0300 | [diff] [blame] | 338 | |
Arnaldo Carvalho de Melo | 876650e | 2012-12-18 19:15:48 -0300 | [diff] [blame] | 339 | for (nd = rb_first(&machines->guests); nd; nd = rb_next(nd)) { |
Arnaldo Carvalho de Melo | 3f067dc | 2012-12-07 17:39:39 -0300 | [diff] [blame] | 340 | struct machine *pos = rb_entry(nd, struct machine, rb_node); |
| 341 | ret += __dsos__fprintf(&pos->kernel_dsos, fp); |
| 342 | ret += __dsos__fprintf(&pos->user_dsos, fp); |
| 343 | } |
| 344 | |
| 345 | return ret; |
| 346 | } |
| 347 | |
| 348 | size_t machine__fprintf_dsos_buildid(struct machine *machine, FILE *fp, |
| 349 | bool (skip)(struct dso *dso, int parm), int parm) |
| 350 | { |
| 351 | return __dsos__fprintf_buildid(&machine->kernel_dsos, fp, skip, parm) + |
| 352 | __dsos__fprintf_buildid(&machine->user_dsos, fp, skip, parm); |
| 353 | } |
| 354 | |
Arnaldo Carvalho de Melo | 876650e | 2012-12-18 19:15:48 -0300 | [diff] [blame] | 355 | size_t machines__fprintf_dsos_buildid(struct machines *machines, FILE *fp, |
Arnaldo Carvalho de Melo | 3f067dc | 2012-12-07 17:39:39 -0300 | [diff] [blame] | 356 | bool (skip)(struct dso *dso, int parm), int parm) |
| 357 | { |
| 358 | struct rb_node *nd; |
Arnaldo Carvalho de Melo | 876650e | 2012-12-18 19:15:48 -0300 | [diff] [blame] | 359 | size_t ret = machine__fprintf_dsos_buildid(&machines->host, fp, skip, parm); |
Arnaldo Carvalho de Melo | 3f067dc | 2012-12-07 17:39:39 -0300 | [diff] [blame] | 360 | |
Arnaldo Carvalho de Melo | 876650e | 2012-12-18 19:15:48 -0300 | [diff] [blame] | 361 | for (nd = rb_first(&machines->guests); nd; nd = rb_next(nd)) { |
Arnaldo Carvalho de Melo | 3f067dc | 2012-12-07 17:39:39 -0300 | [diff] [blame] | 362 | struct machine *pos = rb_entry(nd, struct machine, rb_node); |
| 363 | ret += machine__fprintf_dsos_buildid(pos, fp, skip, parm); |
| 364 | } |
| 365 | return ret; |
| 366 | } |
| 367 | |
| 368 | size_t machine__fprintf_vmlinux_path(struct machine *machine, FILE *fp) |
| 369 | { |
| 370 | int i; |
| 371 | size_t printed = 0; |
| 372 | struct dso *kdso = machine->vmlinux_maps[MAP__FUNCTION]->dso; |
| 373 | |
| 374 | if (kdso->has_build_id) { |
| 375 | char filename[PATH_MAX]; |
| 376 | if (dso__build_id_filename(kdso, filename, sizeof(filename))) |
| 377 | printed += fprintf(fp, "[0] %s\n", filename); |
| 378 | } |
| 379 | |
| 380 | for (i = 0; i < vmlinux_path__nr_entries; ++i) |
| 381 | printed += fprintf(fp, "[%d] %s\n", |
| 382 | i + kdso->has_build_id, vmlinux_path[i]); |
| 383 | |
| 384 | return printed; |
| 385 | } |
| 386 | |
| 387 | size_t machine__fprintf(struct machine *machine, FILE *fp) |
| 388 | { |
| 389 | size_t ret = 0; |
| 390 | struct rb_node *nd; |
| 391 | |
| 392 | for (nd = rb_first(&machine->threads); nd; nd = rb_next(nd)) { |
| 393 | struct thread *pos = rb_entry(nd, struct thread, rb_node); |
| 394 | |
| 395 | ret += thread__fprintf(pos, fp); |
| 396 | } |
| 397 | |
| 398 | return ret; |
| 399 | } |
| 400 | |
| 401 | static struct dso *machine__get_kernel(struct machine *machine) |
| 402 | { |
| 403 | const char *vmlinux_name = NULL; |
| 404 | struct dso *kernel; |
| 405 | |
| 406 | if (machine__is_host(machine)) { |
| 407 | vmlinux_name = symbol_conf.vmlinux_name; |
| 408 | if (!vmlinux_name) |
| 409 | vmlinux_name = "[kernel.kallsyms]"; |
| 410 | |
| 411 | kernel = dso__kernel_findnew(machine, vmlinux_name, |
| 412 | "[kernel]", |
| 413 | DSO_TYPE_KERNEL); |
| 414 | } else { |
| 415 | char bf[PATH_MAX]; |
| 416 | |
| 417 | if (machine__is_default_guest(machine)) |
| 418 | vmlinux_name = symbol_conf.default_guest_vmlinux_name; |
| 419 | if (!vmlinux_name) |
| 420 | vmlinux_name = machine__mmap_name(machine, bf, |
| 421 | sizeof(bf)); |
| 422 | |
| 423 | kernel = dso__kernel_findnew(machine, vmlinux_name, |
| 424 | "[guest.kernel]", |
| 425 | DSO_TYPE_GUEST_KERNEL); |
| 426 | } |
| 427 | |
| 428 | if (kernel != NULL && (!kernel->has_build_id)) |
| 429 | dso__read_running_kernel_build_id(kernel, machine); |
| 430 | |
| 431 | return kernel; |
| 432 | } |
| 433 | |
| 434 | struct process_args { |
| 435 | u64 start; |
| 436 | }; |
| 437 | |
| 438 | static int symbol__in_kernel(void *arg, const char *name, |
| 439 | char type __maybe_unused, u64 start) |
| 440 | { |
| 441 | struct process_args *args = arg; |
| 442 | |
| 443 | if (strchr(name, '[')) |
| 444 | return 0; |
| 445 | |
| 446 | args->start = start; |
| 447 | return 1; |
| 448 | } |
| 449 | |
| 450 | /* Figure out the start address of kernel map from /proc/kallsyms */ |
| 451 | static u64 machine__get_kernel_start_addr(struct machine *machine) |
| 452 | { |
| 453 | const char *filename; |
| 454 | char path[PATH_MAX]; |
| 455 | struct process_args args; |
| 456 | |
| 457 | if (machine__is_host(machine)) { |
| 458 | filename = "/proc/kallsyms"; |
| 459 | } else { |
| 460 | if (machine__is_default_guest(machine)) |
| 461 | filename = (char *)symbol_conf.default_guest_kallsyms; |
| 462 | else { |
| 463 | sprintf(path, "%s/proc/kallsyms", machine->root_dir); |
| 464 | filename = path; |
| 465 | } |
| 466 | } |
| 467 | |
| 468 | if (symbol__restricted_filename(filename, "/proc/kallsyms")) |
| 469 | return 0; |
| 470 | |
| 471 | if (kallsyms__parse(filename, &args, symbol__in_kernel) <= 0) |
| 472 | return 0; |
| 473 | |
| 474 | return args.start; |
| 475 | } |
| 476 | |
| 477 | int __machine__create_kernel_maps(struct machine *machine, struct dso *kernel) |
| 478 | { |
| 479 | enum map_type type; |
| 480 | u64 start = machine__get_kernel_start_addr(machine); |
| 481 | |
| 482 | for (type = 0; type < MAP__NR_TYPES; ++type) { |
| 483 | struct kmap *kmap; |
| 484 | |
| 485 | machine->vmlinux_maps[type] = map__new2(start, kernel, type); |
| 486 | if (machine->vmlinux_maps[type] == NULL) |
| 487 | return -1; |
| 488 | |
| 489 | machine->vmlinux_maps[type]->map_ip = |
| 490 | machine->vmlinux_maps[type]->unmap_ip = |
| 491 | identity__map_ip; |
| 492 | kmap = map__kmap(machine->vmlinux_maps[type]); |
| 493 | kmap->kmaps = &machine->kmaps; |
| 494 | map_groups__insert(&machine->kmaps, |
| 495 | machine->vmlinux_maps[type]); |
| 496 | } |
| 497 | |
| 498 | return 0; |
| 499 | } |
| 500 | |
| 501 | void machine__destroy_kernel_maps(struct machine *machine) |
| 502 | { |
| 503 | enum map_type type; |
| 504 | |
| 505 | for (type = 0; type < MAP__NR_TYPES; ++type) { |
| 506 | struct kmap *kmap; |
| 507 | |
| 508 | if (machine->vmlinux_maps[type] == NULL) |
| 509 | continue; |
| 510 | |
| 511 | kmap = map__kmap(machine->vmlinux_maps[type]); |
| 512 | map_groups__remove(&machine->kmaps, |
| 513 | machine->vmlinux_maps[type]); |
| 514 | if (kmap->ref_reloc_sym) { |
| 515 | /* |
| 516 | * ref_reloc_sym is shared among all maps, so free just |
| 517 | * on one of them. |
| 518 | */ |
| 519 | if (type == MAP__FUNCTION) { |
| 520 | free((char *)kmap->ref_reloc_sym->name); |
| 521 | kmap->ref_reloc_sym->name = NULL; |
| 522 | free(kmap->ref_reloc_sym); |
| 523 | } |
| 524 | kmap->ref_reloc_sym = NULL; |
| 525 | } |
| 526 | |
| 527 | map__delete(machine->vmlinux_maps[type]); |
| 528 | machine->vmlinux_maps[type] = NULL; |
| 529 | } |
| 530 | } |
| 531 | |
Arnaldo Carvalho de Melo | 876650e | 2012-12-18 19:15:48 -0300 | [diff] [blame] | 532 | int machines__create_guest_kernel_maps(struct machines *machines) |
Arnaldo Carvalho de Melo | 3f067dc | 2012-12-07 17:39:39 -0300 | [diff] [blame] | 533 | { |
| 534 | int ret = 0; |
| 535 | struct dirent **namelist = NULL; |
| 536 | int i, items = 0; |
| 537 | char path[PATH_MAX]; |
| 538 | pid_t pid; |
| 539 | char *endp; |
| 540 | |
| 541 | if (symbol_conf.default_guest_vmlinux_name || |
| 542 | symbol_conf.default_guest_modules || |
| 543 | symbol_conf.default_guest_kallsyms) { |
| 544 | machines__create_kernel_maps(machines, DEFAULT_GUEST_KERNEL_ID); |
| 545 | } |
| 546 | |
| 547 | if (symbol_conf.guestmount) { |
| 548 | items = scandir(symbol_conf.guestmount, &namelist, NULL, NULL); |
| 549 | if (items <= 0) |
| 550 | return -ENOENT; |
| 551 | for (i = 0; i < items; i++) { |
| 552 | if (!isdigit(namelist[i]->d_name[0])) { |
| 553 | /* Filter out . and .. */ |
| 554 | continue; |
| 555 | } |
| 556 | pid = (pid_t)strtol(namelist[i]->d_name, &endp, 10); |
| 557 | if ((*endp != '\0') || |
| 558 | (endp == namelist[i]->d_name) || |
| 559 | (errno == ERANGE)) { |
| 560 | pr_debug("invalid directory (%s). Skipping.\n", |
| 561 | namelist[i]->d_name); |
| 562 | continue; |
| 563 | } |
| 564 | sprintf(path, "%s/%s/proc/kallsyms", |
| 565 | symbol_conf.guestmount, |
| 566 | namelist[i]->d_name); |
| 567 | ret = access(path, R_OK); |
| 568 | if (ret) { |
| 569 | pr_debug("Can't access file %s\n", path); |
| 570 | goto failure; |
| 571 | } |
| 572 | machines__create_kernel_maps(machines, pid); |
| 573 | } |
| 574 | failure: |
| 575 | free(namelist); |
| 576 | } |
| 577 | |
| 578 | return ret; |
| 579 | } |
| 580 | |
Arnaldo Carvalho de Melo | 876650e | 2012-12-18 19:15:48 -0300 | [diff] [blame] | 581 | void machines__destroy_kernel_maps(struct machines *machines) |
Arnaldo Carvalho de Melo | 3f067dc | 2012-12-07 17:39:39 -0300 | [diff] [blame] | 582 | { |
Arnaldo Carvalho de Melo | 876650e | 2012-12-18 19:15:48 -0300 | [diff] [blame] | 583 | struct rb_node *next = rb_first(&machines->guests); |
| 584 | |
| 585 | machine__destroy_kernel_maps(&machines->host); |
Arnaldo Carvalho de Melo | 3f067dc | 2012-12-07 17:39:39 -0300 | [diff] [blame] | 586 | |
| 587 | while (next) { |
| 588 | struct machine *pos = rb_entry(next, struct machine, rb_node); |
| 589 | |
| 590 | next = rb_next(&pos->rb_node); |
Arnaldo Carvalho de Melo | 876650e | 2012-12-18 19:15:48 -0300 | [diff] [blame] | 591 | rb_erase(&pos->rb_node, &machines->guests); |
Arnaldo Carvalho de Melo | 3f067dc | 2012-12-07 17:39:39 -0300 | [diff] [blame] | 592 | machine__delete(pos); |
| 593 | } |
| 594 | } |
| 595 | |
Arnaldo Carvalho de Melo | 876650e | 2012-12-18 19:15:48 -0300 | [diff] [blame] | 596 | int machines__create_kernel_maps(struct machines *machines, pid_t pid) |
Arnaldo Carvalho de Melo | 3f067dc | 2012-12-07 17:39:39 -0300 | [diff] [blame] | 597 | { |
| 598 | struct machine *machine = machines__findnew(machines, pid); |
| 599 | |
| 600 | if (machine == NULL) |
| 601 | return -1; |
| 602 | |
| 603 | return machine__create_kernel_maps(machine); |
| 604 | } |
| 605 | |
| 606 | int machine__load_kallsyms(struct machine *machine, const char *filename, |
| 607 | enum map_type type, symbol_filter_t filter) |
| 608 | { |
| 609 | struct map *map = machine->vmlinux_maps[type]; |
| 610 | int ret = dso__load_kallsyms(map->dso, filename, map, filter); |
| 611 | |
| 612 | if (ret > 0) { |
| 613 | dso__set_loaded(map->dso, type); |
| 614 | /* |
| 615 | * Since /proc/kallsyms will have multiple sessions for the |
| 616 | * kernel, with modules between them, fixup the end of all |
| 617 | * sections. |
| 618 | */ |
| 619 | __map_groups__fixup_end(&machine->kmaps, type); |
| 620 | } |
| 621 | |
| 622 | return ret; |
| 623 | } |
| 624 | |
| 625 | int machine__load_vmlinux_path(struct machine *machine, enum map_type type, |
| 626 | symbol_filter_t filter) |
| 627 | { |
| 628 | struct map *map = machine->vmlinux_maps[type]; |
| 629 | int ret = dso__load_vmlinux_path(map->dso, map, filter); |
| 630 | |
| 631 | if (ret > 0) { |
| 632 | dso__set_loaded(map->dso, type); |
| 633 | map__reloc_vmlinux(map); |
| 634 | } |
| 635 | |
| 636 | return ret; |
| 637 | } |
| 638 | |
| 639 | static void map_groups__fixup_end(struct map_groups *mg) |
| 640 | { |
| 641 | int i; |
| 642 | for (i = 0; i < MAP__NR_TYPES; ++i) |
| 643 | __map_groups__fixup_end(mg, i); |
| 644 | } |
| 645 | |
| 646 | static char *get_kernel_version(const char *root_dir) |
| 647 | { |
| 648 | char version[PATH_MAX]; |
| 649 | FILE *file; |
| 650 | char *name, *tmp; |
| 651 | const char *prefix = "Linux version "; |
| 652 | |
| 653 | sprintf(version, "%s/proc/version", root_dir); |
| 654 | file = fopen(version, "r"); |
| 655 | if (!file) |
| 656 | return NULL; |
| 657 | |
| 658 | version[0] = '\0'; |
| 659 | tmp = fgets(version, sizeof(version), file); |
| 660 | fclose(file); |
| 661 | |
| 662 | name = strstr(version, prefix); |
| 663 | if (!name) |
| 664 | return NULL; |
| 665 | name += strlen(prefix); |
| 666 | tmp = strchr(name, ' '); |
| 667 | if (tmp) |
| 668 | *tmp = '\0'; |
| 669 | |
| 670 | return strdup(name); |
| 671 | } |
| 672 | |
| 673 | static int map_groups__set_modules_path_dir(struct map_groups *mg, |
| 674 | const char *dir_name) |
| 675 | { |
| 676 | struct dirent *dent; |
| 677 | DIR *dir = opendir(dir_name); |
| 678 | int ret = 0; |
| 679 | |
| 680 | if (!dir) { |
| 681 | pr_debug("%s: cannot open %s dir\n", __func__, dir_name); |
| 682 | return -1; |
| 683 | } |
| 684 | |
| 685 | while ((dent = readdir(dir)) != NULL) { |
| 686 | char path[PATH_MAX]; |
| 687 | struct stat st; |
| 688 | |
| 689 | /*sshfs might return bad dent->d_type, so we have to stat*/ |
| 690 | snprintf(path, sizeof(path), "%s/%s", dir_name, dent->d_name); |
| 691 | if (stat(path, &st)) |
| 692 | continue; |
| 693 | |
| 694 | if (S_ISDIR(st.st_mode)) { |
| 695 | if (!strcmp(dent->d_name, ".") || |
| 696 | !strcmp(dent->d_name, "..")) |
| 697 | continue; |
| 698 | |
| 699 | ret = map_groups__set_modules_path_dir(mg, path); |
| 700 | if (ret < 0) |
| 701 | goto out; |
| 702 | } else { |
| 703 | char *dot = strrchr(dent->d_name, '.'), |
| 704 | dso_name[PATH_MAX]; |
| 705 | struct map *map; |
| 706 | char *long_name; |
| 707 | |
| 708 | if (dot == NULL || strcmp(dot, ".ko")) |
| 709 | continue; |
| 710 | snprintf(dso_name, sizeof(dso_name), "[%.*s]", |
| 711 | (int)(dot - dent->d_name), dent->d_name); |
| 712 | |
| 713 | strxfrchar(dso_name, '-', '_'); |
| 714 | map = map_groups__find_by_name(mg, MAP__FUNCTION, |
| 715 | dso_name); |
| 716 | if (map == NULL) |
| 717 | continue; |
| 718 | |
| 719 | long_name = strdup(path); |
| 720 | if (long_name == NULL) { |
| 721 | ret = -1; |
| 722 | goto out; |
| 723 | } |
| 724 | dso__set_long_name(map->dso, long_name); |
| 725 | map->dso->lname_alloc = 1; |
| 726 | dso__kernel_module_get_build_id(map->dso, ""); |
| 727 | } |
| 728 | } |
| 729 | |
| 730 | out: |
| 731 | closedir(dir); |
| 732 | return ret; |
| 733 | } |
| 734 | |
| 735 | static int machine__set_modules_path(struct machine *machine) |
| 736 | { |
| 737 | char *version; |
| 738 | char modules_path[PATH_MAX]; |
| 739 | |
| 740 | version = get_kernel_version(machine->root_dir); |
| 741 | if (!version) |
| 742 | return -1; |
| 743 | |
| 744 | snprintf(modules_path, sizeof(modules_path), "%s/lib/modules/%s/kernel", |
| 745 | machine->root_dir, version); |
| 746 | free(version); |
| 747 | |
| 748 | return map_groups__set_modules_path_dir(&machine->kmaps, modules_path); |
| 749 | } |
| 750 | |
| 751 | static int machine__create_modules(struct machine *machine) |
| 752 | { |
| 753 | char *line = NULL; |
| 754 | size_t n; |
| 755 | FILE *file; |
| 756 | struct map *map; |
| 757 | const char *modules; |
| 758 | char path[PATH_MAX]; |
| 759 | |
| 760 | if (machine__is_default_guest(machine)) |
| 761 | modules = symbol_conf.default_guest_modules; |
| 762 | else { |
| 763 | sprintf(path, "%s/proc/modules", machine->root_dir); |
| 764 | modules = path; |
| 765 | } |
| 766 | |
| 767 | if (symbol__restricted_filename(path, "/proc/modules")) |
| 768 | return -1; |
| 769 | |
| 770 | file = fopen(modules, "r"); |
| 771 | if (file == NULL) |
| 772 | return -1; |
| 773 | |
| 774 | while (!feof(file)) { |
| 775 | char name[PATH_MAX]; |
| 776 | u64 start; |
| 777 | char *sep; |
| 778 | int line_len; |
| 779 | |
| 780 | line_len = getline(&line, &n, file); |
| 781 | if (line_len < 0) |
| 782 | break; |
| 783 | |
| 784 | if (!line) |
| 785 | goto out_failure; |
| 786 | |
| 787 | line[--line_len] = '\0'; /* \n */ |
| 788 | |
| 789 | sep = strrchr(line, 'x'); |
| 790 | if (sep == NULL) |
| 791 | continue; |
| 792 | |
| 793 | hex2u64(sep + 1, &start); |
| 794 | |
| 795 | sep = strchr(line, ' '); |
| 796 | if (sep == NULL) |
| 797 | continue; |
| 798 | |
| 799 | *sep = '\0'; |
| 800 | |
| 801 | snprintf(name, sizeof(name), "[%s]", line); |
| 802 | map = machine__new_module(machine, start, name); |
| 803 | if (map == NULL) |
| 804 | goto out_delete_line; |
| 805 | dso__kernel_module_get_build_id(map->dso, machine->root_dir); |
| 806 | } |
| 807 | |
| 808 | free(line); |
| 809 | fclose(file); |
| 810 | |
| 811 | return machine__set_modules_path(machine); |
| 812 | |
| 813 | out_delete_line: |
| 814 | free(line); |
| 815 | out_failure: |
| 816 | return -1; |
| 817 | } |
| 818 | |
| 819 | int machine__create_kernel_maps(struct machine *machine) |
| 820 | { |
| 821 | struct dso *kernel = machine__get_kernel(machine); |
| 822 | |
| 823 | if (kernel == NULL || |
| 824 | __machine__create_kernel_maps(machine, kernel) < 0) |
| 825 | return -1; |
| 826 | |
| 827 | if (symbol_conf.use_modules && machine__create_modules(machine) < 0) { |
| 828 | if (machine__is_host(machine)) |
| 829 | pr_debug("Problems creating module maps, " |
| 830 | "continuing anyway...\n"); |
| 831 | else |
| 832 | pr_debug("Problems creating module maps for guest %d, " |
| 833 | "continuing anyway...\n", machine->pid); |
| 834 | } |
| 835 | |
| 836 | /* |
| 837 | * Now that we have all the maps created, just set the ->end of them: |
| 838 | */ |
| 839 | map_groups__fixup_end(&machine->kmaps); |
| 840 | return 0; |
| 841 | } |
| 842 | |
Arnaldo Carvalho de Melo | b0a7d1a | 2012-10-06 16:26:02 -0300 | [diff] [blame] | 843 | static void machine__set_kernel_mmap_len(struct machine *machine, |
| 844 | union perf_event *event) |
| 845 | { |
Namhyung Kim | 4552cf0f | 2012-11-07 16:27:10 +0900 | [diff] [blame] | 846 | int i; |
| 847 | |
| 848 | for (i = 0; i < MAP__NR_TYPES; i++) { |
| 849 | machine->vmlinux_maps[i]->start = event->mmap.start; |
| 850 | machine->vmlinux_maps[i]->end = (event->mmap.start + |
| 851 | event->mmap.len); |
| 852 | /* |
| 853 | * Be a bit paranoid here, some perf.data file came with |
| 854 | * a zero sized synthesized MMAP event for the kernel. |
| 855 | */ |
| 856 | if (machine->vmlinux_maps[i]->end == 0) |
| 857 | machine->vmlinux_maps[i]->end = ~0ULL; |
| 858 | } |
Arnaldo Carvalho de Melo | b0a7d1a | 2012-10-06 16:26:02 -0300 | [diff] [blame] | 859 | } |
| 860 | |
| 861 | static int machine__process_kernel_mmap_event(struct machine *machine, |
| 862 | union perf_event *event) |
| 863 | { |
| 864 | struct map *map; |
| 865 | char kmmap_prefix[PATH_MAX]; |
| 866 | enum dso_kernel_type kernel_type; |
| 867 | bool is_kernel_mmap; |
| 868 | |
| 869 | machine__mmap_name(machine, kmmap_prefix, sizeof(kmmap_prefix)); |
| 870 | if (machine__is_host(machine)) |
| 871 | kernel_type = DSO_TYPE_KERNEL; |
| 872 | else |
| 873 | kernel_type = DSO_TYPE_GUEST_KERNEL; |
| 874 | |
| 875 | is_kernel_mmap = memcmp(event->mmap.filename, |
| 876 | kmmap_prefix, |
| 877 | strlen(kmmap_prefix) - 1) == 0; |
| 878 | if (event->mmap.filename[0] == '/' || |
| 879 | (!is_kernel_mmap && event->mmap.filename[0] == '[')) { |
| 880 | |
| 881 | char short_module_name[1024]; |
| 882 | char *name, *dot; |
| 883 | |
| 884 | if (event->mmap.filename[0] == '/') { |
| 885 | name = strrchr(event->mmap.filename, '/'); |
| 886 | if (name == NULL) |
| 887 | goto out_problem; |
| 888 | |
| 889 | ++name; /* skip / */ |
| 890 | dot = strrchr(name, '.'); |
| 891 | if (dot == NULL) |
| 892 | goto out_problem; |
| 893 | snprintf(short_module_name, sizeof(short_module_name), |
| 894 | "[%.*s]", (int)(dot - name), name); |
| 895 | strxfrchar(short_module_name, '-', '_'); |
| 896 | } else |
| 897 | strcpy(short_module_name, event->mmap.filename); |
| 898 | |
| 899 | map = machine__new_module(machine, event->mmap.start, |
| 900 | event->mmap.filename); |
| 901 | if (map == NULL) |
| 902 | goto out_problem; |
| 903 | |
| 904 | name = strdup(short_module_name); |
| 905 | if (name == NULL) |
| 906 | goto out_problem; |
| 907 | |
| 908 | map->dso->short_name = name; |
| 909 | map->dso->sname_alloc = 1; |
| 910 | map->end = map->start + event->mmap.len; |
| 911 | } else if (is_kernel_mmap) { |
| 912 | const char *symbol_name = (event->mmap.filename + |
| 913 | strlen(kmmap_prefix)); |
| 914 | /* |
| 915 | * Should be there already, from the build-id table in |
| 916 | * the header. |
| 917 | */ |
| 918 | struct dso *kernel = __dsos__findnew(&machine->kernel_dsos, |
| 919 | kmmap_prefix); |
| 920 | if (kernel == NULL) |
| 921 | goto out_problem; |
| 922 | |
| 923 | kernel->kernel = kernel_type; |
| 924 | if (__machine__create_kernel_maps(machine, kernel) < 0) |
| 925 | goto out_problem; |
| 926 | |
| 927 | machine__set_kernel_mmap_len(machine, event); |
| 928 | |
| 929 | /* |
| 930 | * Avoid using a zero address (kptr_restrict) for the ref reloc |
| 931 | * symbol. Effectively having zero here means that at record |
| 932 | * time /proc/sys/kernel/kptr_restrict was non zero. |
| 933 | */ |
| 934 | if (event->mmap.pgoff != 0) { |
| 935 | maps__set_kallsyms_ref_reloc_sym(machine->vmlinux_maps, |
| 936 | symbol_name, |
| 937 | event->mmap.pgoff); |
| 938 | } |
| 939 | |
| 940 | if (machine__is_default_guest(machine)) { |
| 941 | /* |
| 942 | * preload dso of guest kernel and modules |
| 943 | */ |
| 944 | dso__load(kernel, machine->vmlinux_maps[MAP__FUNCTION], |
| 945 | NULL); |
| 946 | } |
| 947 | } |
| 948 | return 0; |
| 949 | out_problem: |
| 950 | return -1; |
| 951 | } |
| 952 | |
| 953 | int machine__process_mmap_event(struct machine *machine, union perf_event *event) |
| 954 | { |
| 955 | u8 cpumode = event->header.misc & PERF_RECORD_MISC_CPUMODE_MASK; |
| 956 | struct thread *thread; |
| 957 | struct map *map; |
| 958 | int ret = 0; |
| 959 | |
| 960 | if (dump_trace) |
| 961 | perf_event__fprintf_mmap(event, stdout); |
| 962 | |
| 963 | if (cpumode == PERF_RECORD_MISC_GUEST_KERNEL || |
| 964 | cpumode == PERF_RECORD_MISC_KERNEL) { |
| 965 | ret = machine__process_kernel_mmap_event(machine, event); |
| 966 | if (ret < 0) |
| 967 | goto out_problem; |
| 968 | return 0; |
| 969 | } |
| 970 | |
| 971 | thread = machine__findnew_thread(machine, event->mmap.pid); |
| 972 | if (thread == NULL) |
| 973 | goto out_problem; |
| 974 | map = map__new(&machine->user_dsos, event->mmap.start, |
| 975 | event->mmap.len, event->mmap.pgoff, |
| 976 | event->mmap.pid, event->mmap.filename, |
| 977 | MAP__FUNCTION); |
| 978 | if (map == NULL) |
| 979 | goto out_problem; |
| 980 | |
| 981 | thread__insert_map(thread, map); |
| 982 | return 0; |
| 983 | |
| 984 | out_problem: |
| 985 | dump_printf("problem processing PERF_RECORD_MMAP, skipping event.\n"); |
| 986 | return 0; |
| 987 | } |
| 988 | |
| 989 | int machine__process_fork_event(struct machine *machine, union perf_event *event) |
| 990 | { |
| 991 | struct thread *thread = machine__findnew_thread(machine, event->fork.tid); |
| 992 | struct thread *parent = machine__findnew_thread(machine, event->fork.ptid); |
| 993 | |
| 994 | if (dump_trace) |
| 995 | perf_event__fprintf_task(event, stdout); |
| 996 | |
| 997 | if (thread == NULL || parent == NULL || |
| 998 | thread__fork(thread, parent) < 0) { |
| 999 | dump_printf("problem processing PERF_RECORD_FORK, skipping event.\n"); |
| 1000 | return -1; |
| 1001 | } |
| 1002 | |
| 1003 | return 0; |
| 1004 | } |
| 1005 | |
| 1006 | int machine__process_exit_event(struct machine *machine, union perf_event *event) |
| 1007 | { |
| 1008 | struct thread *thread = machine__find_thread(machine, event->fork.tid); |
| 1009 | |
| 1010 | if (dump_trace) |
| 1011 | perf_event__fprintf_task(event, stdout); |
| 1012 | |
| 1013 | if (thread != NULL) |
| 1014 | machine__remove_thread(machine, thread); |
| 1015 | |
| 1016 | return 0; |
| 1017 | } |
| 1018 | |
| 1019 | int machine__process_event(struct machine *machine, union perf_event *event) |
| 1020 | { |
| 1021 | int ret; |
| 1022 | |
| 1023 | switch (event->header.type) { |
| 1024 | case PERF_RECORD_COMM: |
| 1025 | ret = machine__process_comm_event(machine, event); break; |
| 1026 | case PERF_RECORD_MMAP: |
| 1027 | ret = machine__process_mmap_event(machine, event); break; |
| 1028 | case PERF_RECORD_FORK: |
| 1029 | ret = machine__process_fork_event(machine, event); break; |
| 1030 | case PERF_RECORD_EXIT: |
| 1031 | ret = machine__process_exit_event(machine, event); break; |
| 1032 | case PERF_RECORD_LOST: |
| 1033 | ret = machine__process_lost_event(machine, event); break; |
| 1034 | default: |
| 1035 | ret = -1; |
| 1036 | break; |
| 1037 | } |
| 1038 | |
| 1039 | return ret; |
| 1040 | } |
Arnaldo Carvalho de Melo | 3f067dc | 2012-12-07 17:39:39 -0300 | [diff] [blame] | 1041 | |
| 1042 | void machine__remove_thread(struct machine *machine, struct thread *th) |
| 1043 | { |
| 1044 | machine->last_match = NULL; |
| 1045 | rb_erase(&th->rb_node, &machine->threads); |
| 1046 | /* |
| 1047 | * We may have references to this thread, for instance in some hist_entry |
| 1048 | * instances, so just move them to a separate list. |
| 1049 | */ |
| 1050 | list_add_tail(&th->node, &machine->dead_threads); |
| 1051 | } |
| 1052 | |
| 1053 | static bool symbol__match_parent_regex(struct symbol *sym) |
| 1054 | { |
| 1055 | if (sym->name && !regexec(&parent_regex, sym->name, 0, NULL, 0)) |
| 1056 | return 1; |
| 1057 | |
| 1058 | return 0; |
| 1059 | } |
| 1060 | |
| 1061 | static const u8 cpumodes[] = { |
| 1062 | PERF_RECORD_MISC_USER, |
| 1063 | PERF_RECORD_MISC_KERNEL, |
| 1064 | PERF_RECORD_MISC_GUEST_USER, |
| 1065 | PERF_RECORD_MISC_GUEST_KERNEL |
| 1066 | }; |
| 1067 | #define NCPUMODES (sizeof(cpumodes)/sizeof(u8)) |
| 1068 | |
| 1069 | static void ip__resolve_ams(struct machine *machine, struct thread *thread, |
| 1070 | struct addr_map_symbol *ams, |
| 1071 | u64 ip) |
| 1072 | { |
| 1073 | struct addr_location al; |
| 1074 | size_t i; |
| 1075 | u8 m; |
| 1076 | |
| 1077 | memset(&al, 0, sizeof(al)); |
| 1078 | |
| 1079 | for (i = 0; i < NCPUMODES; i++) { |
| 1080 | m = cpumodes[i]; |
| 1081 | /* |
| 1082 | * We cannot use the header.misc hint to determine whether a |
| 1083 | * branch stack address is user, kernel, guest, hypervisor. |
| 1084 | * Branches may straddle the kernel/user/hypervisor boundaries. |
| 1085 | * Thus, we have to try consecutively until we find a match |
| 1086 | * or else, the symbol is unknown |
| 1087 | */ |
| 1088 | thread__find_addr_location(thread, machine, m, MAP__FUNCTION, |
| 1089 | ip, &al, NULL); |
| 1090 | if (al.sym) |
| 1091 | goto found; |
| 1092 | } |
| 1093 | found: |
| 1094 | ams->addr = ip; |
| 1095 | ams->al_addr = al.addr; |
| 1096 | ams->sym = al.sym; |
| 1097 | ams->map = al.map; |
| 1098 | } |
| 1099 | |
| 1100 | struct branch_info *machine__resolve_bstack(struct machine *machine, |
| 1101 | struct thread *thr, |
| 1102 | struct branch_stack *bs) |
| 1103 | { |
| 1104 | struct branch_info *bi; |
| 1105 | unsigned int i; |
| 1106 | |
| 1107 | bi = calloc(bs->nr, sizeof(struct branch_info)); |
| 1108 | if (!bi) |
| 1109 | return NULL; |
| 1110 | |
| 1111 | for (i = 0; i < bs->nr; i++) { |
| 1112 | ip__resolve_ams(machine, thr, &bi[i].to, bs->entries[i].to); |
| 1113 | ip__resolve_ams(machine, thr, &bi[i].from, bs->entries[i].from); |
| 1114 | bi[i].flags = bs->entries[i].flags; |
| 1115 | } |
| 1116 | return bi; |
| 1117 | } |
| 1118 | |
| 1119 | static int machine__resolve_callchain_sample(struct machine *machine, |
| 1120 | struct thread *thread, |
| 1121 | struct ip_callchain *chain, |
| 1122 | struct symbol **parent) |
| 1123 | |
| 1124 | { |
| 1125 | u8 cpumode = PERF_RECORD_MISC_USER; |
| 1126 | unsigned int i; |
| 1127 | int err; |
| 1128 | |
| 1129 | callchain_cursor_reset(&callchain_cursor); |
| 1130 | |
| 1131 | if (chain->nr > PERF_MAX_STACK_DEPTH) { |
| 1132 | pr_warning("corrupted callchain. skipping...\n"); |
| 1133 | return 0; |
| 1134 | } |
| 1135 | |
| 1136 | for (i = 0; i < chain->nr; i++) { |
| 1137 | u64 ip; |
| 1138 | struct addr_location al; |
| 1139 | |
| 1140 | if (callchain_param.order == ORDER_CALLEE) |
| 1141 | ip = chain->ips[i]; |
| 1142 | else |
| 1143 | ip = chain->ips[chain->nr - i - 1]; |
| 1144 | |
| 1145 | if (ip >= PERF_CONTEXT_MAX) { |
| 1146 | switch (ip) { |
| 1147 | case PERF_CONTEXT_HV: |
| 1148 | cpumode = PERF_RECORD_MISC_HYPERVISOR; |
| 1149 | break; |
| 1150 | case PERF_CONTEXT_KERNEL: |
| 1151 | cpumode = PERF_RECORD_MISC_KERNEL; |
| 1152 | break; |
| 1153 | case PERF_CONTEXT_USER: |
| 1154 | cpumode = PERF_RECORD_MISC_USER; |
| 1155 | break; |
| 1156 | default: |
| 1157 | pr_debug("invalid callchain context: " |
| 1158 | "%"PRId64"\n", (s64) ip); |
| 1159 | /* |
| 1160 | * It seems the callchain is corrupted. |
| 1161 | * Discard all. |
| 1162 | */ |
| 1163 | callchain_cursor_reset(&callchain_cursor); |
| 1164 | return 0; |
| 1165 | } |
| 1166 | continue; |
| 1167 | } |
| 1168 | |
| 1169 | al.filtered = false; |
| 1170 | thread__find_addr_location(thread, machine, cpumode, |
| 1171 | MAP__FUNCTION, ip, &al, NULL); |
| 1172 | if (al.sym != NULL) { |
| 1173 | if (sort__has_parent && !*parent && |
| 1174 | symbol__match_parent_regex(al.sym)) |
| 1175 | *parent = al.sym; |
| 1176 | if (!symbol_conf.use_callchain) |
| 1177 | break; |
| 1178 | } |
| 1179 | |
| 1180 | err = callchain_cursor_append(&callchain_cursor, |
| 1181 | ip, al.map, al.sym); |
| 1182 | if (err) |
| 1183 | return err; |
| 1184 | } |
| 1185 | |
| 1186 | return 0; |
| 1187 | } |
| 1188 | |
| 1189 | static int unwind_entry(struct unwind_entry *entry, void *arg) |
| 1190 | { |
| 1191 | struct callchain_cursor *cursor = arg; |
| 1192 | return callchain_cursor_append(cursor, entry->ip, |
| 1193 | entry->map, entry->sym); |
| 1194 | } |
| 1195 | |
| 1196 | int machine__resolve_callchain(struct machine *machine, |
| 1197 | struct perf_evsel *evsel, |
| 1198 | struct thread *thread, |
| 1199 | struct perf_sample *sample, |
| 1200 | struct symbol **parent) |
| 1201 | |
| 1202 | { |
| 1203 | int ret; |
| 1204 | |
| 1205 | callchain_cursor_reset(&callchain_cursor); |
| 1206 | |
| 1207 | ret = machine__resolve_callchain_sample(machine, thread, |
| 1208 | sample->callchain, parent); |
| 1209 | if (ret) |
| 1210 | return ret; |
| 1211 | |
| 1212 | /* Can we do dwarf post unwind? */ |
| 1213 | if (!((evsel->attr.sample_type & PERF_SAMPLE_REGS_USER) && |
| 1214 | (evsel->attr.sample_type & PERF_SAMPLE_STACK_USER))) |
| 1215 | return 0; |
| 1216 | |
| 1217 | /* Bail out if nothing was captured. */ |
| 1218 | if ((!sample->user_regs.regs) || |
| 1219 | (!sample->user_stack.size)) |
| 1220 | return 0; |
| 1221 | |
| 1222 | return unwind__get_entries(unwind_entry, &callchain_cursor, machine, |
| 1223 | thread, evsel->attr.sample_regs_user, |
| 1224 | sample); |
| 1225 | |
| 1226 | } |