xref: /openbmc/linux/tools/perf/util/event.c (revision 6db6b729) 
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 
38 static 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 };
81 
82 const char *perf_event__name(unsigned int id)
83 {
84 	if (id >= ARRAY_SIZE(perf_event__names))
85 		return "INVALID";
86 	if (!perf_event__names[id])
87 		return "UNKNOWN";
88 	return perf_event__names[id];
89 }
90 
91 struct process_symbol_args {
92 	const char *name;
93 	u64	   start;
94 };
95 
96 static int find_func_symbol_cb(void *arg, const char *name, char type,
97 			       u64 start)
98 {
99 	struct process_symbol_args *args = arg;
100 
101 	/*
102 	 * Must be a function or at least an alias, as in PARISC64, where "_text" is
103 	 * an 'A' to the same address as "_stext".
104 	 */
105 	if (!(kallsyms__is_function(type) ||
106 	      type == 'A') || strcmp(name, args->name))
107 		return 0;
108 
109 	args->start = start;
110 	return 1;
111 }
112 
113 static int find_any_symbol_cb(void *arg, const char *name,
114 			      char type __maybe_unused, u64 start)
115 {
116 	struct process_symbol_args *args = arg;
117 
118 	if (strcmp(name, args->name))
119 		return 0;
120 
121 	args->start = start;
122 	return 1;
123 }
124 
125 int kallsyms__get_function_start(const char *kallsyms_filename,
126 				 const char *symbol_name, u64 *addr)
127 {
128 	struct process_symbol_args args = { .name = symbol_name, };
129 
130 	if (kallsyms__parse(kallsyms_filename, &args, find_func_symbol_cb) <= 0)
131 		return -1;
132 
133 	*addr = args.start;
134 	return 0;
135 }
136 
137 int kallsyms__get_symbol_start(const char *kallsyms_filename,
138 			       const char *symbol_name, u64 *addr)
139 {
140 	struct process_symbol_args args = { .name = symbol_name, };
141 
142 	if (kallsyms__parse(kallsyms_filename, &args, find_any_symbol_cb) <= 0)
143 		return -1;
144 
145 	*addr = args.start;
146 	return 0;
147 }
148 
149 void perf_event__read_stat_config(struct perf_stat_config *config,
150 				  struct perf_record_stat_config *event)
151 {
152 	unsigned i;
153 
154 	for (i = 0; i < event->nr; i++) {
155 
156 		switch (event->data[i].tag) {
157 #define CASE(__term, __val)					\
158 		case PERF_STAT_CONFIG_TERM__##__term:		\
159 			config->__val = event->data[i].val;	\
160 			break;
161 
162 		CASE(AGGR_MODE,  aggr_mode)
163 		CASE(SCALE,      scale)
164 		CASE(INTERVAL,   interval)
165 		CASE(AGGR_LEVEL, aggr_level)
166 #undef CASE
167 		default:
168 			pr_warning("unknown stat config term %" PRI_lu64 "\n",
169 				   event->data[i].tag);
170 		}
171 	}
172 }
173 
174 size_t perf_event__fprintf_comm(union perf_event *event, FILE *fp)
175 {
176 	const char *s;
177 
178 	if (event->header.misc & PERF_RECORD_MISC_COMM_EXEC)
179 		s = " exec";
180 	else
181 		s = "";
182 
183 	return fprintf(fp, "%s: %s:%d/%d\n", s, event->comm.comm, event->comm.pid, event->comm.tid);
184 }
185 
186 size_t perf_event__fprintf_namespaces(union perf_event *event, FILE *fp)
187 {
188 	size_t ret = 0;
189 	struct perf_ns_link_info *ns_link_info;
190 	u32 nr_namespaces, idx;
191 
192 	ns_link_info = event->namespaces.link_info;
193 	nr_namespaces = event->namespaces.nr_namespaces;
194 
195 	ret += fprintf(fp, " %d/%d - nr_namespaces: %u\n\t\t[",
196 		       event->namespaces.pid,
197 		       event->namespaces.tid,
198 		       nr_namespaces);
199 
200 	for (idx = 0; idx < nr_namespaces; idx++) {
201 		if (idx && (idx % 4 == 0))
202 			ret += fprintf(fp, "\n\t\t ");
203 
204 		ret  += fprintf(fp, "%u/%s: %" PRIu64 "/%#" PRIx64 "%s", idx,
205 				perf_ns__name(idx), (u64)ns_link_info[idx].dev,
206 				(u64)ns_link_info[idx].ino,
207 				((idx + 1) != nr_namespaces) ? ", " : "]\n");
208 	}
209 
210 	return ret;
211 }
212 
213 size_t perf_event__fprintf_cgroup(union perf_event *event, FILE *fp)
214 {
215 	return fprintf(fp, " cgroup: %" PRI_lu64 " %s\n",
216 		       event->cgroup.id, event->cgroup.path);
217 }
218 
219 int perf_event__process_comm(struct perf_tool *tool __maybe_unused,
220 			     union perf_event *event,
221 			     struct perf_sample *sample,
222 			     struct machine *machine)
223 {
224 	return machine__process_comm_event(machine, event, sample);
225 }
226 
227 int perf_event__process_namespaces(struct perf_tool *tool __maybe_unused,
228 				   union perf_event *event,
229 				   struct perf_sample *sample,
230 				   struct machine *machine)
231 {
232 	return machine__process_namespaces_event(machine, event, sample);
233 }
234 
235 int perf_event__process_cgroup(struct perf_tool *tool __maybe_unused,
236 			       union perf_event *event,
237 			       struct perf_sample *sample,
238 			       struct machine *machine)
239 {
240 	return machine__process_cgroup_event(machine, event, sample);
241 }
242 
243 int perf_event__process_lost(struct perf_tool *tool __maybe_unused,
244 			     union perf_event *event,
245 			     struct perf_sample *sample,
246 			     struct machine *machine)
247 {
248 	return machine__process_lost_event(machine, event, sample);
249 }
250 
251 int perf_event__process_aux(struct perf_tool *tool __maybe_unused,
252 			    union perf_event *event,
253 			    struct perf_sample *sample __maybe_unused,
254 			    struct machine *machine)
255 {
256 	return machine__process_aux_event(machine, event);
257 }
258 
259 int perf_event__process_itrace_start(struct perf_tool *tool __maybe_unused,
260 				     union perf_event *event,
261 				     struct perf_sample *sample __maybe_unused,
262 				     struct machine *machine)
263 {
264 	return machine__process_itrace_start_event(machine, event);
265 }
266 
267 int perf_event__process_aux_output_hw_id(struct perf_tool *tool __maybe_unused,
268 					 union perf_event *event,
269 					 struct perf_sample *sample __maybe_unused,
270 					 struct machine *machine)
271 {
272 	return machine__process_aux_output_hw_id_event(machine, event);
273 }
274 
275 int perf_event__process_lost_samples(struct perf_tool *tool __maybe_unused,
276 				     union perf_event *event,
277 				     struct perf_sample *sample,
278 				     struct machine *machine)
279 {
280 	return machine__process_lost_samples_event(machine, event, sample);
281 }
282 
283 int perf_event__process_switch(struct perf_tool *tool __maybe_unused,
284 			       union perf_event *event,
285 			       struct perf_sample *sample __maybe_unused,
286 			       struct machine *machine)
287 {
288 	return machine__process_switch_event(machine, event);
289 }
290 
291 int perf_event__process_ksymbol(struct perf_tool *tool __maybe_unused,
292 				union perf_event *event,
293 				struct perf_sample *sample __maybe_unused,
294 				struct machine *machine)
295 {
296 	return machine__process_ksymbol(machine, event, sample);
297 }
298 
299 int perf_event__process_bpf(struct perf_tool *tool __maybe_unused,
300 			    union perf_event *event,
301 			    struct perf_sample *sample,
302 			    struct machine *machine)
303 {
304 	return machine__process_bpf(machine, event, sample);
305 }
306 
307 int perf_event__process_text_poke(struct perf_tool *tool __maybe_unused,
308 				  union perf_event *event,
309 				  struct perf_sample *sample,
310 				  struct machine *machine)
311 {
312 	return machine__process_text_poke(machine, event, sample);
313 }
314 
315 size_t perf_event__fprintf_mmap(union perf_event *event, FILE *fp)
316 {
317 	return fprintf(fp, " %d/%d: [%#" PRI_lx64 "(%#" PRI_lx64 ") @ %#" PRI_lx64 "]: %c %s\n",
318 		       event->mmap.pid, event->mmap.tid, event->mmap.start,
319 		       event->mmap.len, event->mmap.pgoff,
320 		       (event->header.misc & PERF_RECORD_MISC_MMAP_DATA) ? 'r' : 'x',
321 		       event->mmap.filename);
322 }
323 
324 size_t perf_event__fprintf_mmap2(union perf_event *event, FILE *fp)
325 {
326 	if (event->header.misc & PERF_RECORD_MISC_MMAP_BUILD_ID) {
327 		char sbuild_id[SBUILD_ID_SIZE];
328 		struct build_id bid;
329 
330 		build_id__init(&bid, event->mmap2.build_id,
331 			       event->mmap2.build_id_size);
332 		build_id__sprintf(&bid, sbuild_id);
333 
334 		return fprintf(fp, " %d/%d: [%#" PRI_lx64 "(%#" PRI_lx64 ") @ %#" PRI_lx64
335 				   " <%s>]: %c%c%c%c %s\n",
336 			       event->mmap2.pid, event->mmap2.tid, event->mmap2.start,
337 			       event->mmap2.len, event->mmap2.pgoff, sbuild_id,
338 			       (event->mmap2.prot & PROT_READ) ? 'r' : '-',
339 			       (event->mmap2.prot & PROT_WRITE) ? 'w' : '-',
340 			       (event->mmap2.prot & PROT_EXEC) ? 'x' : '-',
341 			       (event->mmap2.flags & MAP_SHARED) ? 's' : 'p',
342 			       event->mmap2.filename);
343 	} else {
344 		return fprintf(fp, " %d/%d: [%#" PRI_lx64 "(%#" PRI_lx64 ") @ %#" PRI_lx64
345 				   " %02x:%02x %"PRI_lu64" %"PRI_lu64"]: %c%c%c%c %s\n",
346 			       event->mmap2.pid, event->mmap2.tid, event->mmap2.start,
347 			       event->mmap2.len, event->mmap2.pgoff, event->mmap2.maj,
348 			       event->mmap2.min, event->mmap2.ino,
349 			       event->mmap2.ino_generation,
350 			       (event->mmap2.prot & PROT_READ) ? 'r' : '-',
351 			       (event->mmap2.prot & PROT_WRITE) ? 'w' : '-',
352 			       (event->mmap2.prot & PROT_EXEC) ? 'x' : '-',
353 			       (event->mmap2.flags & MAP_SHARED) ? 's' : 'p',
354 			       event->mmap2.filename);
355 	}
356 }
357 
358 size_t perf_event__fprintf_thread_map(union perf_event *event, FILE *fp)
359 {
360 	struct perf_thread_map *threads = thread_map__new_event(&event->thread_map);
361 	size_t ret;
362 
363 	ret = fprintf(fp, " nr: ");
364 
365 	if (threads)
366 		ret += thread_map__fprintf(threads, fp);
367 	else
368 		ret += fprintf(fp, "failed to get threads from event\n");
369 
370 	perf_thread_map__put(threads);
371 	return ret;
372 }
373 
374 size_t perf_event__fprintf_cpu_map(union perf_event *event, FILE *fp)
375 {
376 	struct perf_cpu_map *cpus = cpu_map__new_data(&event->cpu_map.data);
377 	size_t ret;
378 
379 	ret = fprintf(fp, ": ");
380 
381 	if (cpus)
382 		ret += cpu_map__fprintf(cpus, fp);
383 	else
384 		ret += fprintf(fp, "failed to get cpumap from event\n");
385 
386 	perf_cpu_map__put(cpus);
387 	return ret;
388 }
389 
390 int perf_event__process_mmap(struct perf_tool *tool __maybe_unused,
391 			     union perf_event *event,
392 			     struct perf_sample *sample,
393 			     struct machine *machine)
394 {
395 	return machine__process_mmap_event(machine, event, sample);
396 }
397 
398 int perf_event__process_mmap2(struct perf_tool *tool __maybe_unused,
399 			     union perf_event *event,
400 			     struct perf_sample *sample,
401 			     struct machine *machine)
402 {
403 	return machine__process_mmap2_event(machine, event, sample);
404 }
405 
406 size_t perf_event__fprintf_task(union perf_event *event, FILE *fp)
407 {
408 	return fprintf(fp, "(%d:%d):(%d:%d)\n",
409 		       event->fork.pid, event->fork.tid,
410 		       event->fork.ppid, event->fork.ptid);
411 }
412 
413 int perf_event__process_fork(struct perf_tool *tool __maybe_unused,
414 			     union perf_event *event,
415 			     struct perf_sample *sample,
416 			     struct machine *machine)
417 {
418 	return machine__process_fork_event(machine, event, sample);
419 }
420 
421 int perf_event__process_exit(struct perf_tool *tool __maybe_unused,
422 			     union perf_event *event,
423 			     struct perf_sample *sample,
424 			     struct machine *machine)
425 {
426 	return machine__process_exit_event(machine, event, sample);
427 }
428 
429 size_t perf_event__fprintf_aux(union perf_event *event, FILE *fp)
430 {
431 	return fprintf(fp, " offset: %#"PRI_lx64" size: %#"PRI_lx64" flags: %#"PRI_lx64" [%s%s%s]\n",
432 		       event->aux.aux_offset, event->aux.aux_size,
433 		       event->aux.flags,
434 		       event->aux.flags & PERF_AUX_FLAG_TRUNCATED ? "T" : "",
435 		       event->aux.flags & PERF_AUX_FLAG_OVERWRITE ? "O" : "",
436 		       event->aux.flags & PERF_AUX_FLAG_PARTIAL   ? "P" : "");
437 }
438 
439 size_t perf_event__fprintf_itrace_start(union perf_event *event, FILE *fp)
440 {
441 	return fprintf(fp, " pid: %u tid: %u\n",
442 		       event->itrace_start.pid, event->itrace_start.tid);
443 }
444 
445 size_t perf_event__fprintf_aux_output_hw_id(union perf_event *event, FILE *fp)
446 {
447 	return fprintf(fp, " hw_id: %#"PRI_lx64"\n",
448 		       event->aux_output_hw_id.hw_id);
449 }
450 
451 size_t perf_event__fprintf_switch(union perf_event *event, FILE *fp)
452 {
453 	bool out = event->header.misc & PERF_RECORD_MISC_SWITCH_OUT;
454 	const char *in_out = !out ? "IN         " :
455 		!(event->header.misc & PERF_RECORD_MISC_SWITCH_OUT_PREEMPT) ?
456 				    "OUT        " : "OUT preempt";
457 
458 	if (event->header.type == PERF_RECORD_SWITCH)
459 		return fprintf(fp, " %s\n", in_out);
460 
461 	return fprintf(fp, " %s  %s pid/tid: %5d/%-5d\n",
462 		       in_out, out ? "next" : "prev",
463 		       event->context_switch.next_prev_pid,
464 		       event->context_switch.next_prev_tid);
465 }
466 
467 static size_t perf_event__fprintf_lost(union perf_event *event, FILE *fp)
468 {
469 	return fprintf(fp, " lost %" PRI_lu64 "\n", event->lost.lost);
470 }
471 
472 size_t perf_event__fprintf_ksymbol(union perf_event *event, FILE *fp)
473 {
474 	return fprintf(fp, " addr %" PRI_lx64 " len %u type %u flags 0x%x name %s\n",
475 		       event->ksymbol.addr, event->ksymbol.len,
476 		       event->ksymbol.ksym_type,
477 		       event->ksymbol.flags, event->ksymbol.name);
478 }
479 
480 size_t perf_event__fprintf_bpf(union perf_event *event, FILE *fp)
481 {
482 	return fprintf(fp, " type %u, flags %u, id %u\n",
483 		       event->bpf.type, event->bpf.flags, event->bpf.id);
484 }
485 
486 static int text_poke_printer(enum binary_printer_ops op, unsigned int val,
487 			     void *extra, FILE *fp)
488 {
489 	bool old = *(bool *)extra;
490 
491 	switch ((int)op) {
492 	case BINARY_PRINT_LINE_BEGIN:
493 		return fprintf(fp, "            %s bytes:", old ? "Old" : "New");
494 	case BINARY_PRINT_NUM_DATA:
495 		return fprintf(fp, " %02x", val);
496 	case BINARY_PRINT_LINE_END:
497 		return fprintf(fp, "\n");
498 	default:
499 		return 0;
500 	}
501 }
502 
503 size_t perf_event__fprintf_text_poke(union perf_event *event, struct machine *machine, FILE *fp)
504 {
505 	struct perf_record_text_poke_event *tp = &event->text_poke;
506 	size_t ret;
507 	bool old;
508 
509 	ret = fprintf(fp, " %" PRI_lx64 " ", tp->addr);
510 	if (machine) {
511 		struct addr_location al;
512 
513 		addr_location__init(&al);
514 		al.map = map__get(maps__find(machine__kernel_maps(machine), tp->addr));
515 		if (al.map && map__load(al.map) >= 0) {
516 			al.addr = map__map_ip(al.map, tp->addr);
517 			al.sym = map__find_symbol(al.map, al.addr);
518 			if (al.sym)
519 				ret += symbol__fprintf_symname_offs(al.sym, &al, fp);
520 		}
521 		addr_location__exit(&al);
522 	}
523 	ret += fprintf(fp, " old len %u new len %u\n", tp->old_len, tp->new_len);
524 	old = true;
525 	ret += binary__fprintf(tp->bytes, tp->old_len, 16, text_poke_printer,
526 			       &old, fp);
527 	old = false;
528 	ret += binary__fprintf(tp->bytes + tp->old_len, tp->new_len, 16,
529 			       text_poke_printer, &old, fp);
530 	return ret;
531 }
532 
533 size_t perf_event__fprintf(union perf_event *event, struct machine *machine, FILE *fp)
534 {
535 	size_t ret = fprintf(fp, "PERF_RECORD_%s",
536 			     perf_event__name(event->header.type));
537 
538 	switch (event->header.type) {
539 	case PERF_RECORD_COMM:
540 		ret += perf_event__fprintf_comm(event, fp);
541 		break;
542 	case PERF_RECORD_FORK:
543 	case PERF_RECORD_EXIT:
544 		ret += perf_event__fprintf_task(event, fp);
545 		break;
546 	case PERF_RECORD_MMAP:
547 		ret += perf_event__fprintf_mmap(event, fp);
548 		break;
549 	case PERF_RECORD_NAMESPACES:
550 		ret += perf_event__fprintf_namespaces(event, fp);
551 		break;
552 	case PERF_RECORD_CGROUP:
553 		ret += perf_event__fprintf_cgroup(event, fp);
554 		break;
555 	case PERF_RECORD_MMAP2:
556 		ret += perf_event__fprintf_mmap2(event, fp);
557 		break;
558 	case PERF_RECORD_AUX:
559 		ret += perf_event__fprintf_aux(event, fp);
560 		break;
561 	case PERF_RECORD_ITRACE_START:
562 		ret += perf_event__fprintf_itrace_start(event, fp);
563 		break;
564 	case PERF_RECORD_SWITCH:
565 	case PERF_RECORD_SWITCH_CPU_WIDE:
566 		ret += perf_event__fprintf_switch(event, fp);
567 		break;
568 	case PERF_RECORD_LOST:
569 		ret += perf_event__fprintf_lost(event, fp);
570 		break;
571 	case PERF_RECORD_KSYMBOL:
572 		ret += perf_event__fprintf_ksymbol(event, fp);
573 		break;
574 	case PERF_RECORD_BPF_EVENT:
575 		ret += perf_event__fprintf_bpf(event, fp);
576 		break;
577 	case PERF_RECORD_TEXT_POKE:
578 		ret += perf_event__fprintf_text_poke(event, machine, fp);
579 		break;
580 	case PERF_RECORD_AUX_OUTPUT_HW_ID:
581 		ret += perf_event__fprintf_aux_output_hw_id(event, fp);
582 		break;
583 	default:
584 		ret += fprintf(fp, "\n");
585 	}
586 
587 	return ret;
588 }
589 
590 int perf_event__process(struct perf_tool *tool __maybe_unused,
591 			union perf_event *event,
592 			struct perf_sample *sample,
593 			struct machine *machine)
594 {
595 	return machine__process_event(machine, event, sample);
596 }
597 
598 struct map *thread__find_map(struct thread *thread, u8 cpumode, u64 addr,
599 			     struct addr_location *al)
600 {
601 	struct maps *maps = thread__maps(thread);
602 	struct machine *machine = maps__machine(maps);
603 	bool load_map = false;
604 
605 	maps__zput(al->maps);
606 	map__zput(al->map);
607 	thread__zput(al->thread);
608 	al->thread = thread__get(thread);
609 
610 	al->addr = addr;
611 	al->cpumode = cpumode;
612 	al->filtered = 0;
613 
614 	if (machine == NULL)
615 		return NULL;
616 
617 	if (cpumode == PERF_RECORD_MISC_KERNEL && perf_host) {
618 		al->level = 'k';
619 		maps = machine__kernel_maps(machine);
620 		load_map = true;
621 	} else if (cpumode == PERF_RECORD_MISC_USER && perf_host) {
622 		al->level = '.';
623 	} else if (cpumode == PERF_RECORD_MISC_GUEST_KERNEL && perf_guest) {
624 		al->level = 'g';
625 		maps = machine__kernel_maps(machine);
626 		load_map = true;
627 	} else if (cpumode == PERF_RECORD_MISC_GUEST_USER && perf_guest) {
628 		al->level = 'u';
629 	} else {
630 		al->level = 'H';
631 
632 		if ((cpumode == PERF_RECORD_MISC_GUEST_USER ||
633 			cpumode == PERF_RECORD_MISC_GUEST_KERNEL) &&
634 			!perf_guest)
635 			al->filtered |= (1 << HIST_FILTER__GUEST);
636 		if ((cpumode == PERF_RECORD_MISC_USER ||
637 			cpumode == PERF_RECORD_MISC_KERNEL) &&
638 			!perf_host)
639 			al->filtered |= (1 << HIST_FILTER__HOST);
640 
641 		return NULL;
642 	}
643 	al->maps = maps__get(maps);
644 	al->map = map__get(maps__find(maps, al->addr));
645 	if (al->map != NULL) {
646 		/*
647 		 * Kernel maps might be changed when loading symbols so loading
648 		 * must be done prior to using kernel maps.
649 		 */
650 		if (load_map)
651 			map__load(al->map);
652 		al->addr = map__map_ip(al->map, al->addr);
653 	}
654 
655 	return al->map;
656 }
657 
658 /*
659  * For branch stacks or branch samples, the sample cpumode might not be correct
660  * because it applies only to the sample 'ip' and not necessary to 'addr' or
661  * branch stack addresses. If possible, use a fallback to deal with those cases.
662  */
663 struct map *thread__find_map_fb(struct thread *thread, u8 cpumode, u64 addr,
664 				struct addr_location *al)
665 {
666 	struct map *map = thread__find_map(thread, cpumode, addr, al);
667 	struct machine *machine = maps__machine(thread__maps(thread));
668 	u8 addr_cpumode = machine__addr_cpumode(machine, cpumode, addr);
669 
670 	if (map || addr_cpumode == cpumode)
671 		return map;
672 
673 	return thread__find_map(thread, addr_cpumode, addr, al);
674 }
675 
676 struct symbol *thread__find_symbol(struct thread *thread, u8 cpumode,
677 				   u64 addr, struct addr_location *al)
678 {
679 	al->sym = NULL;
680 	if (thread__find_map(thread, cpumode, addr, al))
681 		al->sym = map__find_symbol(al->map, al->addr);
682 	return al->sym;
683 }
684 
685 struct symbol *thread__find_symbol_fb(struct thread *thread, u8 cpumode,
686 				      u64 addr, struct addr_location *al)
687 {
688 	al->sym = NULL;
689 	if (thread__find_map_fb(thread, cpumode, addr, al))
690 		al->sym = map__find_symbol(al->map, al->addr);
691 	return al->sym;
692 }
693 
694 static bool check_address_range(struct intlist *addr_list, int addr_range,
695 				unsigned long addr)
696 {
697 	struct int_node *pos;
698 
699 	intlist__for_each_entry(pos, addr_list) {
700 		if (addr >= pos->i && addr < pos->i + addr_range)
701 			return true;
702 	}
703 
704 	return false;
705 }
706 
707 /*
708  * Callers need to drop the reference to al->thread, obtained in
709  * machine__findnew_thread()
710  */
711 int machine__resolve(struct machine *machine, struct addr_location *al,
712 		     struct perf_sample *sample)
713 {
714 	struct thread *thread;
715 	struct dso *dso;
716 
717 	if (symbol_conf.guest_code && !machine__is_host(machine))
718 		thread = machine__findnew_guest_code(machine, sample->pid);
719 	else
720 		thread = machine__findnew_thread(machine, sample->pid, sample->tid);
721 	if (thread == NULL)
722 		return -1;
723 
724 	dump_printf(" ... thread: %s:%d\n", thread__comm_str(thread), thread__tid(thread));
725 	thread__find_map(thread, sample->cpumode, sample->ip, al);
726 	dso = al->map ? map__dso(al->map) : NULL;
727 	dump_printf(" ...... dso: %s\n",
728 		dso
729 		? dso->long_name
730 		: (al->level == 'H' ? "[hypervisor]" : "<not found>"));
731 
732 	if (thread__is_filtered(thread))
733 		al->filtered |= (1 << HIST_FILTER__THREAD);
734 
735 	thread__put(thread);
736 	thread = NULL;
737 
738 	al->sym = NULL;
739 	al->cpu = sample->cpu;
740 	al->socket = -1;
741 	al->srcline = NULL;
742 
743 	if (al->cpu >= 0) {
744 		struct perf_env *env = machine->env;
745 
746 		if (env && env->cpu)
747 			al->socket = env->cpu[al->cpu].socket_id;
748 	}
749 
750 	if (al->map) {
751 		if (symbol_conf.dso_list &&
752 		    (!dso || !(strlist__has_entry(symbol_conf.dso_list,
753 						  dso->short_name) ||
754 			       (dso->short_name != dso->long_name &&
755 				strlist__has_entry(symbol_conf.dso_list,
756 						   dso->long_name))))) {
757 			al->filtered |= (1 << HIST_FILTER__DSO);
758 		}
759 
760 		al->sym = map__find_symbol(al->map, al->addr);
761 	} else if (symbol_conf.dso_list) {
762 		al->filtered |= (1 << HIST_FILTER__DSO);
763 	}
764 
765 	if (symbol_conf.sym_list) {
766 		int ret = 0;
767 		char al_addr_str[32];
768 		size_t sz = sizeof(al_addr_str);
769 
770 		if (al->sym) {
771 			ret = strlist__has_entry(symbol_conf.sym_list,
772 						al->sym->name);
773 		}
774 		if (!ret && al->sym) {
775 			snprintf(al_addr_str, sz, "0x%"PRIx64,
776 				 map__unmap_ip(al->map, al->sym->start));
777 			ret = strlist__has_entry(symbol_conf.sym_list,
778 						al_addr_str);
779 		}
780 		if (!ret && symbol_conf.addr_list && al->map) {
781 			unsigned long addr = map__unmap_ip(al->map, al->addr);
782 
783 			ret = intlist__has_entry(symbol_conf.addr_list, addr);
784 			if (!ret && symbol_conf.addr_range) {
785 				ret = check_address_range(symbol_conf.addr_list,
786 							  symbol_conf.addr_range,
787 							  addr);
788 			}
789 		}
790 
791 		if (!ret)
792 			al->filtered |= (1 << HIST_FILTER__SYMBOL);
793 	}
794 
795 	return 0;
796 }
797 
798 bool is_bts_event(struct perf_event_attr *attr)
799 {
800 	return attr->type == PERF_TYPE_HARDWARE &&
801 	       (attr->config & PERF_COUNT_HW_BRANCH_INSTRUCTIONS) &&
802 	       attr->sample_period == 1;
803 }
804 
805 bool sample_addr_correlates_sym(struct perf_event_attr *attr)
806 {
807 	if (attr->type == PERF_TYPE_SOFTWARE &&
808 	    (attr->config == PERF_COUNT_SW_PAGE_FAULTS ||
809 	     attr->config == PERF_COUNT_SW_PAGE_FAULTS_MIN ||
810 	     attr->config == PERF_COUNT_SW_PAGE_FAULTS_MAJ))
811 		return true;
812 
813 	if (is_bts_event(attr))
814 		return true;
815 
816 	return false;
817 }
818 
819 void thread__resolve(struct thread *thread, struct addr_location *al,
820 		     struct perf_sample *sample)
821 {
822 	thread__find_map_fb(thread, sample->cpumode, sample->addr, al);
823 
824 	al->cpu = sample->cpu;
825 	al->sym = NULL;
826 
827 	if (al->map)
828 		al->sym = map__find_symbol(al->map, al->addr);
829 }
830