1#include <errno.h>
2#include <fcntl.h>
3#include <inttypes.h>
4#include <linux/kernel.h>
5#include <linux/types.h>
6#include <perf/cpumap.h>
7#include <sys/types.h>
8#include <sys/stat.h>
9#include <unistd.h>
10#include <uapi/linux/mman.h> /* To get things like MAP_HUGETLB even on older libc headers */
11#include <linux/perf_event.h>
12#include <linux/zalloc.h>
13#include "cpumap.h"
14#include "dso.h"
15#include "event.h"
16#include "debug.h"
17#include "hist.h"
18#include "machine.h"
19#include "sort.h"
20#include "string2.h"
21#include "strlist.h"
22#include "thread.h"
23#include "thread_map.h"
24#include "time-utils.h"
25#include <linux/ctype.h>
26#include "map.h"
27#include "util/namespaces.h"
28#include "symbol.h"
29#include "symbol/kallsyms.h"
30#include "asm/bug.h"
31#include "stat.h"
32#include "session.h"
33#include "bpf-event.h"
34#include "print_binary.h"
35#include "tool.h"
36#include "util.h"
37
38static const char *perf_event__names[] = {
39 [0] = "TOTAL",
40 [PERF_RECORD_MMAP] = "MMAP",
41 [PERF_RECORD_MMAP2] = "MMAP2",
42 [PERF_RECORD_LOST] = "LOST",
43 [PERF_RECORD_COMM] = "COMM",
44 [PERF_RECORD_EXIT] = "EXIT",
45 [PERF_RECORD_THROTTLE] = "THROTTLE",
46 [PERF_RECORD_UNTHROTTLE] = "UNTHROTTLE",
47 [PERF_RECORD_FORK] = "FORK",
48 [PERF_RECORD_READ] = "READ",
49 [PERF_RECORD_SAMPLE] = "SAMPLE",
50 [PERF_RECORD_AUX] = "AUX",
51 [PERF_RECORD_ITRACE_START] = "ITRACE_START",
52 [PERF_RECORD_LOST_SAMPLES] = "LOST_SAMPLES",
53 [PERF_RECORD_SWITCH] = "SWITCH",
54 [PERF_RECORD_SWITCH_CPU_WIDE] = "SWITCH_CPU_WIDE",
55 [PERF_RECORD_NAMESPACES] = "NAMESPACES",
56 [PERF_RECORD_KSYMBOL] = "KSYMBOL",
57 [PERF_RECORD_BPF_EVENT] = "BPF_EVENT",
58 [PERF_RECORD_CGROUP] = "CGROUP",
59 [PERF_RECORD_TEXT_POKE] = "TEXT_POKE",
60 [PERF_RECORD_AUX_OUTPUT_HW_ID] = "AUX_OUTPUT_HW_ID",
61 [PERF_RECORD_HEADER_ATTR] = "ATTR",
62 [PERF_RECORD_HEADER_EVENT_TYPE] = "EVENT_TYPE",
63 [PERF_RECORD_HEADER_TRACING_DATA] = "TRACING_DATA",
64 [PERF_RECORD_HEADER_BUILD_ID] = "BUILD_ID",
65 [PERF_RECORD_FINISHED_ROUND] = "FINISHED_ROUND",
66 [PERF_RECORD_ID_INDEX] = "ID_INDEX",
67 [PERF_RECORD_AUXTRACE_INFO] = "AUXTRACE_INFO",
68 [PERF_RECORD_AUXTRACE] = "AUXTRACE",
69 [PERF_RECORD_AUXTRACE_ERROR] = "AUXTRACE_ERROR",
70 [PERF_RECORD_THREAD_MAP] = "THREAD_MAP",
71 [PERF_RECORD_CPU_MAP] = "CPU_MAP",
72 [PERF_RECORD_STAT_CONFIG] = "STAT_CONFIG",
73 [PERF_RECORD_STAT] = "STAT",
74 [PERF_RECORD_STAT_ROUND] = "STAT_ROUND",
75 [PERF_RECORD_EVENT_UPDATE] = "EVENT_UPDATE",
76 [PERF_RECORD_TIME_CONV] = "TIME_CONV",
77 [PERF_RECORD_HEADER_FEATURE] = "FEATURE",
78 [PERF_RECORD_COMPRESSED] = "COMPRESSED",
79 [PERF_RECORD_FINISHED_INIT] = "FINISHED_INIT",
80 [PERF_RECORD_COMPRESSED2] = "COMPRESSED2",
81};
82
83const char *perf_event__name(unsigned int id)
84{
85 if (id >= ARRAY_SIZE(perf_event__names))
86 return "INVALID";
87 if (!perf_event__names[id])
88 return "UNKNOWN";
89 return perf_event__names[id];
90}
91
92struct process_symbol_args {
93 const char *name;
94 u64 start;
95};
96
97static int find_func_symbol_cb(void *arg, const char *name, char type,
98 u64 start)
99{
100 struct process_symbol_args *args = arg;
101
102 /*
103 * Must be a function or at least an alias, as in PARISC64, where "_text" is
104 * an 'A' to the same address as "_stext".
105 */
106 if (!(kallsyms__is_function(type) ||
107 type == 'A') || strcmp(name, args->name))
108 return 0;
109
110 args->start = start;
111 return 1;
112}
113
114static int find_any_symbol_cb(void *arg, const char *name,
115 char type __maybe_unused, u64 start)
116{
117 struct process_symbol_args *args = arg;
118
119 if (strcmp(name, args->name))
120 return 0;
121
122 args->start = start;
123 return 1;
124}
125
126int kallsyms__get_function_start(const char *kallsyms_filename,
127 const char *symbol_name, u64 *addr)
128{
129 struct process_symbol_args args = { .name = symbol_name, };
130
131 if (kallsyms__parse(kallsyms_filename, &args, find_func_symbol_cb) <= 0)
132 return -1;
133
134 *addr = args.start;
135 return 0;
136}
137
138int kallsyms__get_symbol_start(const char *kallsyms_filename,
139 const char *symbol_name, u64 *addr)
140{
141 struct process_symbol_args args = { .name = symbol_name, };
142
143 if (kallsyms__parse(kallsyms_filename, &args, find_any_symbol_cb) <= 0)
144 return -1;
145
146 *addr = args.start;
147 return 0;
148}
149
150void perf_event__read_stat_config(struct perf_stat_config *config,
151 struct perf_record_stat_config *event)
152{
153 unsigned i;
154
155 for (i = 0; i < event->nr; i++) {
156
157 switch (event->data[i].tag) {
158#define CASE(__term, __val) \
159 case PERF_STAT_CONFIG_TERM__##__term: \
160 config->__val = event->data[i].val; \
161 break;
162
163 CASE(AGGR_MODE, aggr_mode)
164 CASE(SCALE, scale)
165 CASE(INTERVAL, interval)
166 CASE(AGGR_LEVEL, aggr_level)
167#undef CASE
168 default:
169 pr_warning("unknown stat config term %" PRI_lu64 "\n",
170 event->data[i].tag);
171 }
172 }
173}
174
175size_t perf_event__fprintf_comm(union perf_event *event, FILE *fp)
176{
177 const char *s;
178
179 if (event->header.misc & PERF_RECORD_MISC_COMM_EXEC)
180 s = " exec";
181 else
182 s = "";
183
184 return fprintf(fp, "%s: %s:%d/%d\n", s, event->comm.comm, event->comm.pid, event->comm.tid);
185}
186
187size_t perf_event__fprintf_namespaces(union perf_event *event, FILE *fp)
188{
189 size_t ret = 0;
190 struct perf_ns_link_info *ns_link_info;
191 u32 nr_namespaces, idx;
192
193 ns_link_info = event->namespaces.link_info;
194 nr_namespaces = event->namespaces.nr_namespaces;
195
196 ret += fprintf(fp, " %d/%d - nr_namespaces: %u\n\t\t[",
197 event->namespaces.pid,
198 event->namespaces.tid,
199 nr_namespaces);
200
201 for (idx = 0; idx < nr_namespaces; idx++) {
202 if (idx && (idx % 4 == 0))
203 ret += fprintf(fp, "\n\t\t ");
204
205 ret += fprintf(fp, "%u/%s: %" PRIu64 "/%#" PRIx64 "%s", idx,
206 perf_ns__name(idx), (u64)ns_link_info[idx].dev,
207 (u64)ns_link_info[idx].ino,
208 ((idx + 1) != nr_namespaces) ? ", " : "]\n");
209 }
210
211 return ret;
212}
213
214size_t perf_event__fprintf_cgroup(union perf_event *event, FILE *fp)
215{
216 return fprintf(fp, " cgroup: %" PRI_lu64 " %s\n",
217 event->cgroup.id, event->cgroup.path);
218}
219
220int perf_event__process_comm(const struct perf_tool *tool __maybe_unused,
221 union perf_event *event,
222 struct perf_sample *sample,
223 struct machine *machine)
224{
225 return machine__process_comm_event(machine, event, sample);
226}
227
228int perf_event__process_namespaces(const struct perf_tool *tool __maybe_unused,
229 union perf_event *event,
230 struct perf_sample *sample,
231 struct machine *machine)
232{
233 return machine__process_namespaces_event(machine, event, sample);
234}
235
236int perf_event__process_cgroup(const struct perf_tool *tool __maybe_unused,
237 union perf_event *event,
238 struct perf_sample *sample,
239 struct machine *machine)
240{
241 return machine__process_cgroup_event(machine, event, sample);
242}
243
244int perf_event__process_lost(const struct perf_tool *tool __maybe_unused,
245 union perf_event *event,
246 struct perf_sample *sample,
247 struct machine *machine)
248{
249 return machine__process_lost_event(machine, event, sample);
250}
251
252int perf_event__process_aux(const struct perf_tool *tool __maybe_unused,
253 union perf_event *event,
254 struct perf_sample *sample __maybe_unused,
255 struct machine *machine)
256{
257 return machine__process_aux_event(machine, event);
258}
259
260int perf_event__process_itrace_start(const struct perf_tool *tool __maybe_unused,
261 union perf_event *event,
262 struct perf_sample *sample __maybe_unused,
263 struct machine *machine)
264{
265 return machine__process_itrace_start_event(machine, event);
266}
267
268int perf_event__process_aux_output_hw_id(const struct perf_tool *tool __maybe_unused,
269 union perf_event *event,
270 struct perf_sample *sample __maybe_unused,
271 struct machine *machine)
272{
273 return machine__process_aux_output_hw_id_event(machine, event);
274}
275
276int perf_event__process_lost_samples(const struct perf_tool *tool __maybe_unused,
277 union perf_event *event,
278 struct perf_sample *sample,
279 struct machine *machine)
280{
281 return machine__process_lost_samples_event(machine, event, sample);
282}
283
284int perf_event__process_switch(const struct perf_tool *tool __maybe_unused,
285 union perf_event *event,
286 struct perf_sample *sample __maybe_unused,
287 struct machine *machine)
288{
289 return machine__process_switch_event(machine, event);
290}
291
292int perf_event__process_ksymbol(const struct perf_tool *tool __maybe_unused,
293 union perf_event *event,
294 struct perf_sample *sample __maybe_unused,
295 struct machine *machine)
296{
297 return machine__process_ksymbol(machine, event, sample);
298}
299
300int perf_event__process_bpf(const struct perf_tool *tool __maybe_unused,
301 union perf_event *event,
302 struct perf_sample *sample,
303 struct machine *machine)
304{
305 return machine__process_bpf(machine, event, sample);
306}
307
308int perf_event__process_text_poke(const struct perf_tool *tool __maybe_unused,
309 union perf_event *event,
310 struct perf_sample *sample,
311 struct machine *machine)
312{
313 return machine__process_text_poke(machine, event, sample);
314}
315
316size_t perf_event__fprintf_mmap(union perf_event *event, FILE *fp)
317{
318 return fprintf(fp, " %d/%d: [%#" PRI_lx64 "(%#" PRI_lx64 ") @ %#" PRI_lx64 "]: %c %s\n",
319 event->mmap.pid, event->mmap.tid, event->mmap.start,
320 event->mmap.len, event->mmap.pgoff,
321 (event->header.misc & PERF_RECORD_MISC_MMAP_DATA) ? 'r' : 'x',
322 event->mmap.filename);
323}
324
325size_t perf_event__fprintf_mmap2(union perf_event *event, FILE *fp)
326{
327 if (event->header.misc & PERF_RECORD_MISC_MMAP_BUILD_ID) {
328 char sbuild_id[SBUILD_ID_SIZE];
329 struct build_id bid;
330
331 build_id__init(bid: &bid, data: event->mmap2.build_id,
332 size: event->mmap2.build_id_size);
333 build_id__sprintf(build_id: &bid, bf: sbuild_id);
334
335 return fprintf(fp, " %d/%d: [%#" PRI_lx64 "(%#" PRI_lx64 ") @ %#" PRI_lx64
336 " <%s>]: %c%c%c%c %s\n",
337 event->mmap2.pid, event->mmap2.tid, event->mmap2.start,
338 event->mmap2.len, event->mmap2.pgoff, sbuild_id,
339 (event->mmap2.prot & PROT_READ) ? 'r' : '-',
340 (event->mmap2.prot & PROT_WRITE) ? 'w' : '-',
341 (event->mmap2.prot & PROT_EXEC) ? 'x' : '-',
342 (event->mmap2.flags & MAP_SHARED) ? 's' : 'p',
343 event->mmap2.filename);
344 } else {
345 return fprintf(fp, " %d/%d: [%#" PRI_lx64 "(%#" PRI_lx64 ") @ %#" PRI_lx64
346 " %02x:%02x %"PRI_lu64" %"PRI_lu64"]: %c%c%c%c %s\n",
347 event->mmap2.pid, event->mmap2.tid, event->mmap2.start,
348 event->mmap2.len, event->mmap2.pgoff, event->mmap2.maj,
349 event->mmap2.min, event->mmap2.ino,
350 event->mmap2.ino_generation,
351 (event->mmap2.prot & PROT_READ) ? 'r' : '-',
352 (event->mmap2.prot & PROT_WRITE) ? 'w' : '-',
353 (event->mmap2.prot & PROT_EXEC) ? 'x' : '-',
354 (event->mmap2.flags & MAP_SHARED) ? 's' : 'p',
355 event->mmap2.filename);
356 }
357}
358
359size_t perf_event__fprintf_thread_map(union perf_event *event, FILE *fp)
360{
361 struct perf_thread_map *threads = thread_map__new_event(event: &event->thread_map);
362 size_t ret;
363
364 ret = fprintf(fp, " nr: ");
365
366 if (threads)
367 ret += thread_map__fprintf(threads, fp);
368 else
369 ret += fprintf(fp, "failed to get threads from event\n");
370
371 perf_thread_map__put(threads);
372 return ret;
373}
374
375size_t perf_event__fprintf_cpu_map(union perf_event *event, FILE *fp)
376{
377 struct perf_cpu_map *cpus = cpu_map__new_data(data: &event->cpu_map.data);
378 size_t ret;
379
380 ret = fprintf(fp, ": ");
381
382 if (cpus)
383 ret += cpu_map__fprintf(cpus, fp);
384 else
385 ret += fprintf(fp, "failed to get cpumap from event\n");
386
387 perf_cpu_map__put(cpus);
388 return ret;
389}
390
391int perf_event__process_mmap(const struct perf_tool *tool __maybe_unused,
392 union perf_event *event,
393 struct perf_sample *sample,
394 struct machine *machine)
395{
396 return machine__process_mmap_event(machine, event, sample);
397}
398
399int perf_event__process_mmap2(const struct perf_tool *tool __maybe_unused,
400 union perf_event *event,
401 struct perf_sample *sample,
402 struct machine *machine)
403{
404 return machine__process_mmap2_event(machine, event, sample);
405}
406
407size_t perf_event__fprintf_task(union perf_event *event, FILE *fp)
408{
409 return fprintf(fp, "(%d:%d):(%d:%d)\n",
410 event->fork.pid, event->fork.tid,
411 event->fork.ppid, event->fork.ptid);
412}
413
414int perf_event__process_fork(const struct perf_tool *tool __maybe_unused,
415 union perf_event *event,
416 struct perf_sample *sample,
417 struct machine *machine)
418{
419 return machine__process_fork_event(machine, event, sample);
420}
421
422int perf_event__process_exit(const struct perf_tool *tool __maybe_unused,
423 union perf_event *event,
424 struct perf_sample *sample,
425 struct machine *machine)
426{
427 return machine__process_exit_event(machine, event, sample);
428}
429
430int perf_event__exit_del_thread(const struct perf_tool *tool __maybe_unused,
431 union perf_event *event,
432 struct perf_sample *sample __maybe_unused,
433 struct machine *machine)
434{
435 struct thread *thread = machine__findnew_thread(machine,
436 pid: event->fork.pid,
437 tid: event->fork.tid);
438
439 dump_printf(fmt: "(%d:%d):(%d:%d)\n", event->fork.pid, event->fork.tid,
440 event->fork.ppid, event->fork.ptid);
441
442 if (thread) {
443 machine__remove_thread(machine, th: thread);
444 thread__put(thread);
445 }
446
447 return 0;
448}
449
450size_t perf_event__fprintf_aux(union perf_event *event, FILE *fp)
451{
452 return fprintf(fp, " offset: %#"PRI_lx64" size: %#"PRI_lx64" flags: %#"PRI_lx64" [%s%s%s%s]\n",
453 event->aux.aux_offset, event->aux.aux_size,
454 event->aux.flags,
455 event->aux.flags & PERF_AUX_FLAG_TRUNCATED ? "T" : "",
456 event->aux.flags & PERF_AUX_FLAG_OVERWRITE ? "O" : "",
457 event->aux.flags & PERF_AUX_FLAG_PARTIAL ? "P" : "",
458 event->aux.flags & PERF_AUX_FLAG_COLLISION ? "C" : "");
459}
460
461size_t perf_event__fprintf_itrace_start(union perf_event *event, FILE *fp)
462{
463 return fprintf(fp, " pid: %u tid: %u\n",
464 event->itrace_start.pid, event->itrace_start.tid);
465}
466
467size_t perf_event__fprintf_aux_output_hw_id(union perf_event *event, FILE *fp)
468{
469 return fprintf(fp, " hw_id: %#"PRI_lx64"\n",
470 event->aux_output_hw_id.hw_id);
471}
472
473size_t perf_event__fprintf_switch(union perf_event *event, FILE *fp)
474{
475 bool out = event->header.misc & PERF_RECORD_MISC_SWITCH_OUT;
476 const char *in_out = !out ? "IN " :
477 !(event->header.misc & PERF_RECORD_MISC_SWITCH_OUT_PREEMPT) ?
478 "OUT " : "OUT preempt";
479
480 if (event->header.type == PERF_RECORD_SWITCH)
481 return fprintf(fp, " %s\n", in_out);
482
483 return fprintf(fp, " %s %s pid/tid: %5d/%-5d\n",
484 in_out, out ? "next" : "prev",
485 event->context_switch.next_prev_pid,
486 event->context_switch.next_prev_tid);
487}
488
489static size_t perf_event__fprintf_lost(union perf_event *event, FILE *fp)
490{
491 return fprintf(fp, " lost %" PRI_lu64 "\n", event->lost.lost);
492}
493
494size_t perf_event__fprintf_ksymbol(union perf_event *event, FILE *fp)
495{
496 return fprintf(fp, " addr %" PRI_lx64 " len %u type %u flags 0x%x name %s\n",
497 event->ksymbol.addr, event->ksymbol.len,
498 event->ksymbol.ksym_type,
499 event->ksymbol.flags, event->ksymbol.name);
500}
501
502size_t perf_event__fprintf_bpf(union perf_event *event, FILE *fp)
503{
504 return fprintf(fp, " type %u, flags %u, id %u\n",
505 event->bpf.type, event->bpf.flags, event->bpf.id);
506}
507
508static int text_poke_printer(enum binary_printer_ops op, unsigned int val,
509 void *extra, FILE *fp)
510{
511 bool old = *(bool *)extra;
512
513 switch ((int)op) {
514 case BINARY_PRINT_LINE_BEGIN:
515 return fprintf(fp, " %s bytes:", old ? "Old" : "New");
516 case BINARY_PRINT_NUM_DATA:
517 return fprintf(fp, " %02x", val);
518 case BINARY_PRINT_LINE_END:
519 return fprintf(fp, "\n");
520 default:
521 return 0;
522 }
523}
524
525size_t perf_event__fprintf_text_poke(union perf_event *event, struct machine *machine, FILE *fp)
526{
527 struct perf_record_text_poke_event *tp = &event->text_poke;
528 size_t ret;
529 bool old;
530
531 ret = fprintf(fp, " %" PRI_lx64 " ", tp->addr);
532 if (machine) {
533 struct addr_location al;
534
535 addr_location__init(al: &al);
536 al.map = maps__find(maps: machine__kernel_maps(machine), addr: tp->addr);
537 if (al.map && map__load(map: al.map) >= 0) {
538 al.addr = map__map_ip(map: al.map, ip_or_rip: tp->addr);
539 al.sym = map__find_symbol(map: al.map, addr: al.addr);
540 if (al.sym)
541 ret += symbol__fprintf_symname_offs(al.sym, &al, fp);
542 }
543 addr_location__exit(al: &al);
544 }
545 ret += fprintf(fp, " old len %u new len %u\n", tp->old_len, tp->new_len);
546 old = true;
547 ret += binary__fprintf(tp->bytes, tp->old_len, 16, text_poke_printer,
548 &old, fp);
549 old = false;
550 ret += binary__fprintf(tp->bytes + tp->old_len, tp->new_len, 16,
551 text_poke_printer, &old, fp);
552 return ret;
553}
554
555size_t perf_event__fprintf(union perf_event *event, struct machine *machine, FILE *fp)
556{
557 size_t ret = fprintf(fp, "PERF_RECORD_%s",
558 perf_event__name(id: event->header.type));
559
560 switch (event->header.type) {
561 case PERF_RECORD_COMM:
562 ret += perf_event__fprintf_comm(event, fp);
563 break;
564 case PERF_RECORD_FORK:
565 case PERF_RECORD_EXIT:
566 ret += perf_event__fprintf_task(event, fp);
567 break;
568 case PERF_RECORD_MMAP:
569 ret += perf_event__fprintf_mmap(event, fp);
570 break;
571 case PERF_RECORD_NAMESPACES:
572 ret += perf_event__fprintf_namespaces(event, fp);
573 break;
574 case PERF_RECORD_CGROUP:
575 ret += perf_event__fprintf_cgroup(event, fp);
576 break;
577 case PERF_RECORD_MMAP2:
578 ret += perf_event__fprintf_mmap2(event, fp);
579 break;
580 case PERF_RECORD_AUX:
581 ret += perf_event__fprintf_aux(event, fp);
582 break;
583 case PERF_RECORD_ITRACE_START:
584 ret += perf_event__fprintf_itrace_start(event, fp);
585 break;
586 case PERF_RECORD_SWITCH:
587 case PERF_RECORD_SWITCH_CPU_WIDE:
588 ret += perf_event__fprintf_switch(event, fp);
589 break;
590 case PERF_RECORD_LOST:
591 ret += perf_event__fprintf_lost(event, fp);
592 break;
593 case PERF_RECORD_KSYMBOL:
594 ret += perf_event__fprintf_ksymbol(event, fp);
595 break;
596 case PERF_RECORD_BPF_EVENT:
597 ret += perf_event__fprintf_bpf(event, fp);
598 break;
599 case PERF_RECORD_TEXT_POKE:
600 ret += perf_event__fprintf_text_poke(event, machine, fp);
601 break;
602 case PERF_RECORD_AUX_OUTPUT_HW_ID:
603 ret += perf_event__fprintf_aux_output_hw_id(event, fp);
604 break;
605 default:
606 ret += fprintf(fp, "\n");
607 }
608
609 return ret;
610}
611
612int perf_event__process(const struct perf_tool *tool __maybe_unused,
613 union perf_event *event,
614 struct perf_sample *sample,
615 struct machine *machine)
616{
617 return machine__process_event(machine, event, sample);
618}
619
620struct map *thread__find_map(struct thread *thread, u8 cpumode, u64 addr,
621 struct addr_location *al)
622{
623 struct maps *maps = thread__maps(thread);
624 struct machine *machine = maps__machine(maps);
625 bool load_map = false;
626
627 maps__zput(al->maps);
628 map__zput(al->map);
629 thread__zput(al->thread);
630 al->thread = thread__get(thread);
631
632 al->addr = addr;
633 al->cpumode = cpumode;
634 al->filtered = 0;
635
636 if (machine == NULL)
637 return NULL;
638
639 if (cpumode == PERF_RECORD_MISC_KERNEL && perf_host) {
640 al->level = 'k';
641 maps = machine__kernel_maps(machine);
642 load_map = !symbol_conf.lazy_load_kernel_maps;
643 } else if (cpumode == PERF_RECORD_MISC_USER && perf_host) {
644 al->level = '.';
645 } else if (cpumode == PERF_RECORD_MISC_GUEST_KERNEL && perf_guest) {
646 al->level = 'g';
647 maps = machine__kernel_maps(machine);
648 load_map = !symbol_conf.lazy_load_kernel_maps;
649 } else if (cpumode == PERF_RECORD_MISC_GUEST_USER && perf_guest) {
650 al->level = 'u';
651 } else {
652 al->level = 'H';
653
654 if ((cpumode == PERF_RECORD_MISC_GUEST_USER ||
655 cpumode == PERF_RECORD_MISC_GUEST_KERNEL) &&
656 !perf_guest)
657 al->filtered |= (1 << HIST_FILTER__GUEST);
658 if ((cpumode == PERF_RECORD_MISC_USER ||
659 cpumode == PERF_RECORD_MISC_KERNEL) &&
660 !perf_host)
661 al->filtered |= (1 << HIST_FILTER__HOST);
662
663 return NULL;
664 }
665 al->maps = maps__get(maps);
666 al->map = maps__find(maps, addr: al->addr);
667 if (al->map != NULL) {
668 /*
669 * Kernel maps might be changed when loading symbols so loading
670 * must be done prior to using kernel maps.
671 */
672 if (load_map)
673 map__load(map: al->map);
674 al->addr = map__map_ip(map: al->map, ip_or_rip: al->addr);
675 }
676
677 return al->map;
678}
679
680/*
681 * For branch stacks or branch samples, the sample cpumode might not be correct
682 * because it applies only to the sample 'ip' and not necessary to 'addr' or
683 * branch stack addresses. If possible, use a fallback to deal with those cases.
684 */
685struct map *thread__find_map_fb(struct thread *thread, u8 cpumode, u64 addr,
686 struct addr_location *al)
687{
688 struct map *map = thread__find_map(thread, cpumode, addr, al);
689 struct machine *machine = maps__machine(maps: thread__maps(thread));
690 u8 addr_cpumode = machine__addr_cpumode(machine, cpumode, addr);
691
692 if (map || addr_cpumode == cpumode)
693 return map;
694
695 return thread__find_map(thread, cpumode: addr_cpumode, addr, al);
696}
697
698struct symbol *thread__find_symbol(struct thread *thread, u8 cpumode,
699 u64 addr, struct addr_location *al)
700{
701 al->sym = NULL;
702 if (thread__find_map(thread, cpumode, addr, al))
703 al->sym = map__find_symbol(map: al->map, addr: al->addr);
704 return al->sym;
705}
706
707struct symbol *thread__find_symbol_fb(struct thread *thread, u8 cpumode,
708 u64 addr, struct addr_location *al)
709{
710 al->sym = NULL;
711 if (thread__find_map_fb(thread, cpumode, addr, al))
712 al->sym = map__find_symbol(map: al->map, addr: al->addr);
713 return al->sym;
714}
715
716static bool check_address_range(struct intlist *addr_list, int addr_range,
717 unsigned long addr)
718{
719 struct int_node *pos;
720
721 intlist__for_each_entry(pos, addr_list) {
722 if (addr >= pos->i && addr < pos->i + addr_range)
723 return true;
724 }
725
726 return false;
727}
728
729/*
730 * Callers need to drop the reference to al->thread, obtained in
731 * machine__findnew_thread()
732 */
733int machine__resolve(struct machine *machine, struct addr_location *al,
734 struct perf_sample *sample)
735{
736 struct thread *thread;
737 struct dso *dso;
738
739 if (symbol_conf.guest_code && !machine__is_host(machine))
740 thread = machine__findnew_guest_code(machine, pid: sample->pid);
741 else
742 thread = machine__findnew_thread(machine, pid: sample->pid, tid: sample->tid);
743 if (thread == NULL)
744 return -1;
745
746 dump_printf(fmt: " ... thread: %s:%d\n", thread__comm_str(thread), thread__tid(thread));
747 thread__find_map(thread, cpumode: sample->cpumode, addr: sample->ip, al);
748 dso = al->map ? map__dso(map: al->map) : NULL;
749 dump_printf(fmt: " ...... dso: %s\n",
750 dso
751 ? dso__long_name(dso)
752 : (al->level == 'H' ? "[hypervisor]" : "<not found>"));
753
754 if (thread__is_filtered(thread))
755 al->filtered |= (1 << HIST_FILTER__THREAD);
756
757 thread__put(thread);
758 thread = NULL;
759
760 al->sym = NULL;
761 al->cpu = sample->cpu;
762 al->socket = -1;
763 al->srcline = NULL;
764
765 if (al->cpu >= 0) {
766 struct perf_env *env = machine->env;
767
768 if (env && env->cpu)
769 al->socket = env->cpu[al->cpu].socket_id;
770 }
771
772 /* Account for possible out-of-order switch events. */
773 al->parallelism = max(1, min(machine->parallelism, machine__nr_cpus_avail(machine)));
774 if (test_bit(al->parallelism, symbol_conf.parallelism_filter))
775 al->filtered |= (1 << HIST_FILTER__PARALLELISM);
776 /*
777 * Multiply it by some const to avoid precision loss or dealing
778 * with floats. The multiplier does not matter otherwise since
779 * we only print it as percents.
780 */
781 al->latency = sample->period * 1000 / al->parallelism;
782
783 if (al->map) {
784 if (symbol_conf.dso_list &&
785 (!dso || !(strlist__has_entry(slist: symbol_conf.dso_list,
786 entry: dso__short_name(dso)) ||
787 (dso__short_name(dso) != dso__long_name(dso) &&
788 strlist__has_entry(slist: symbol_conf.dso_list,
789 entry: dso__long_name(dso)))))) {
790 al->filtered |= (1 << HIST_FILTER__DSO);
791 }
792
793 al->sym = map__find_symbol(map: al->map, addr: al->addr);
794 } else if (symbol_conf.dso_list) {
795 al->filtered |= (1 << HIST_FILTER__DSO);
796 }
797
798 if (symbol_conf.sym_list) {
799 int ret = 0;
800 char al_addr_str[32];
801 size_t sz = sizeof(al_addr_str);
802
803 if (al->sym) {
804 ret = strlist__has_entry(slist: symbol_conf.sym_list,
805 entry: al->sym->name);
806 }
807 if (!ret && al->sym) {
808 snprintf(al_addr_str, sz, "0x%"PRIx64,
809 map__unmap_ip(al->map, al->sym->start));
810 ret = strlist__has_entry(slist: symbol_conf.sym_list,
811 entry: al_addr_str);
812 }
813 if (!ret && symbol_conf.addr_list && al->map) {
814 unsigned long addr = map__unmap_ip(map: al->map, ip_or_rip: al->addr);
815
816 ret = intlist__has_entry(ilist: symbol_conf.addr_list, i: addr);
817 if (!ret && symbol_conf.addr_range) {
818 ret = check_address_range(addr_list: symbol_conf.addr_list,
819 addr_range: symbol_conf.addr_range,
820 addr);
821 }
822 }
823
824 if (!ret)
825 al->filtered |= (1 << HIST_FILTER__SYMBOL);
826 }
827
828 return 0;
829}
830
831bool is_bts_event(struct perf_event_attr *attr)
832{
833 return attr->type == PERF_TYPE_HARDWARE &&
834 (attr->config & PERF_COUNT_HW_BRANCH_INSTRUCTIONS) &&
835 attr->sample_period == 1;
836}
837
838bool sample_addr_correlates_sym(struct perf_event_attr *attr)
839{
840 if (attr->type == PERF_TYPE_SOFTWARE &&
841 (attr->config == PERF_COUNT_SW_PAGE_FAULTS ||
842 attr->config == PERF_COUNT_SW_PAGE_FAULTS_MIN ||
843 attr->config == PERF_COUNT_SW_PAGE_FAULTS_MAJ))
844 return true;
845
846 if (is_bts_event(attr))
847 return true;
848
849 return false;
850}
851
852void thread__resolve(struct thread *thread, struct addr_location *al,
853 struct perf_sample *sample)
854{
855 thread__find_map_fb(thread, cpumode: sample->cpumode, addr: sample->addr, al);
856
857 al->cpu = sample->cpu;
858 al->sym = NULL;
859
860 if (al->map)
861 al->sym = map__find_symbol(map: al->map, addr: al->addr);
862}
863

source code of linux/tools/perf/util/event.c