xref: /openbmc/linux/tools/perf/util/event.c (revision 3db55767) 
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_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 int kallsyms__get_function_start(const char *kallsyms_filename,
114 				 const char *symbol_name, u64 *addr)
115 {
116 	struct process_symbol_args args = { .name = symbol_name, };
117 
118 	if (kallsyms__parse(kallsyms_filename, &args, find_symbol_cb) <= 0)
119 		return -1;
120 
121 	*addr = args.start;
122 	return 0;
123 }
124 
125 void perf_event__read_stat_config(struct perf_stat_config *config,
126 				  struct perf_record_stat_config *event)
127 {
128 	unsigned i;
129 
130 	for (i = 0; i < event->nr; i++) {
131 
132 		switch (event->data[i].tag) {
133 #define CASE(__term, __val)					\
134 		case PERF_STAT_CONFIG_TERM__##__term:		\
135 			config->__val = event->data[i].val;	\
136 			break;
137 
138 		CASE(AGGR_MODE, aggr_mode)
139 		CASE(SCALE,     scale)
140 		CASE(INTERVAL,  interval)
141 #undef CASE
142 		default:
143 			pr_warning("unknown stat config term %" PRI_lu64 "\n",
144 				   event->data[i].tag);
145 		}
146 	}
147 }
148 
149 size_t perf_event__fprintf_comm(union perf_event *event, FILE *fp)
150 {
151 	const char *s;
152 
153 	if (event->header.misc & PERF_RECORD_MISC_COMM_EXEC)
154 		s = " exec";
155 	else
156 		s = "";
157 
158 	return fprintf(fp, "%s: %s:%d/%d\n", s, event->comm.comm, event->comm.pid, event->comm.tid);
159 }
160 
161 size_t perf_event__fprintf_namespaces(union perf_event *event, FILE *fp)
162 {
163 	size_t ret = 0;
164 	struct perf_ns_link_info *ns_link_info;
165 	u32 nr_namespaces, idx;
166 
167 	ns_link_info = event->namespaces.link_info;
168 	nr_namespaces = event->namespaces.nr_namespaces;
169 
170 	ret += fprintf(fp, " %d/%d - nr_namespaces: %u\n\t\t[",
171 		       event->namespaces.pid,
172 		       event->namespaces.tid,
173 		       nr_namespaces);
174 
175 	for (idx = 0; idx < nr_namespaces; idx++) {
176 		if (idx && (idx % 4 == 0))
177 			ret += fprintf(fp, "\n\t\t ");
178 
179 		ret  += fprintf(fp, "%u/%s: %" PRIu64 "/%#" PRIx64 "%s", idx,
180 				perf_ns__name(idx), (u64)ns_link_info[idx].dev,
181 				(u64)ns_link_info[idx].ino,
182 				((idx + 1) != nr_namespaces) ? ", " : "]\n");
183 	}
184 
185 	return ret;
186 }
187 
188 size_t perf_event__fprintf_cgroup(union perf_event *event, FILE *fp)
189 {
190 	return fprintf(fp, " cgroup: %" PRI_lu64 " %s\n",
191 		       event->cgroup.id, event->cgroup.path);
192 }
193 
194 int perf_event__process_comm(struct perf_tool *tool __maybe_unused,
195 			     union perf_event *event,
196 			     struct perf_sample *sample,
197 			     struct machine *machine)
198 {
199 	return machine__process_comm_event(machine, event, sample);
200 }
201 
202 int perf_event__process_namespaces(struct perf_tool *tool __maybe_unused,
203 				   union perf_event *event,
204 				   struct perf_sample *sample,
205 				   struct machine *machine)
206 {
207 	return machine__process_namespaces_event(machine, event, sample);
208 }
209 
210 int perf_event__process_cgroup(struct perf_tool *tool __maybe_unused,
211 			       union perf_event *event,
212 			       struct perf_sample *sample,
213 			       struct machine *machine)
214 {
215 	return machine__process_cgroup_event(machine, event, sample);
216 }
217 
218 int perf_event__process_lost(struct perf_tool *tool __maybe_unused,
219 			     union perf_event *event,
220 			     struct perf_sample *sample,
221 			     struct machine *machine)
222 {
223 	return machine__process_lost_event(machine, event, sample);
224 }
225 
226 int perf_event__process_aux(struct perf_tool *tool __maybe_unused,
227 			    union perf_event *event,
228 			    struct perf_sample *sample __maybe_unused,
229 			    struct machine *machine)
230 {
231 	return machine__process_aux_event(machine, event);
232 }
233 
234 int perf_event__process_itrace_start(struct perf_tool *tool __maybe_unused,
235 				     union perf_event *event,
236 				     struct perf_sample *sample __maybe_unused,
237 				     struct machine *machine)
238 {
239 	return machine__process_itrace_start_event(machine, event);
240 }
241 
242 int perf_event__process_aux_output_hw_id(struct perf_tool *tool __maybe_unused,
243 					 union perf_event *event,
244 					 struct perf_sample *sample __maybe_unused,
245 					 struct machine *machine)
246 {
247 	return machine__process_aux_output_hw_id_event(machine, event);
248 }
249 
250 int perf_event__process_lost_samples(struct perf_tool *tool __maybe_unused,
251 				     union perf_event *event,
252 				     struct perf_sample *sample,
253 				     struct machine *machine)
254 {
255 	return machine__process_lost_samples_event(machine, event, sample);
256 }
257 
258 int perf_event__process_switch(struct perf_tool *tool __maybe_unused,
259 			       union perf_event *event,
260 			       struct perf_sample *sample __maybe_unused,
261 			       struct machine *machine)
262 {
263 	return machine__process_switch_event(machine, event);
264 }
265 
266 int perf_event__process_ksymbol(struct perf_tool *tool __maybe_unused,
267 				union perf_event *event,
268 				struct perf_sample *sample __maybe_unused,
269 				struct machine *machine)
270 {
271 	return machine__process_ksymbol(machine, event, sample);
272 }
273 
274 int perf_event__process_bpf(struct perf_tool *tool __maybe_unused,
275 			    union perf_event *event,
276 			    struct perf_sample *sample,
277 			    struct machine *machine)
278 {
279 	return machine__process_bpf(machine, event, sample);
280 }
281 
282 int perf_event__process_text_poke(struct perf_tool *tool __maybe_unused,
283 				  union perf_event *event,
284 				  struct perf_sample *sample,
285 				  struct machine *machine)
286 {
287 	return machine__process_text_poke(machine, event, sample);
288 }
289 
290 size_t perf_event__fprintf_mmap(union perf_event *event, FILE *fp)
291 {
292 	return fprintf(fp, " %d/%d: [%#" PRI_lx64 "(%#" PRI_lx64 ") @ %#" PRI_lx64 "]: %c %s\n",
293 		       event->mmap.pid, event->mmap.tid, event->mmap.start,
294 		       event->mmap.len, event->mmap.pgoff,
295 		       (event->header.misc & PERF_RECORD_MISC_MMAP_DATA) ? 'r' : 'x',
296 		       event->mmap.filename);
297 }
298 
299 size_t perf_event__fprintf_mmap2(union perf_event *event, FILE *fp)
300 {
301 	if (event->header.misc & PERF_RECORD_MISC_MMAP_BUILD_ID) {
302 		char sbuild_id[SBUILD_ID_SIZE];
303 		struct build_id bid;
304 
305 		build_id__init(&bid, event->mmap2.build_id,
306 			       event->mmap2.build_id_size);
307 		build_id__sprintf(&bid, sbuild_id);
308 
309 		return fprintf(fp, " %d/%d: [%#" PRI_lx64 "(%#" PRI_lx64 ") @ %#" PRI_lx64
310 				   " <%s>]: %c%c%c%c %s\n",
311 			       event->mmap2.pid, event->mmap2.tid, event->mmap2.start,
312 			       event->mmap2.len, event->mmap2.pgoff, sbuild_id,
313 			       (event->mmap2.prot & PROT_READ) ? 'r' : '-',
314 			       (event->mmap2.prot & PROT_WRITE) ? 'w' : '-',
315 			       (event->mmap2.prot & PROT_EXEC) ? 'x' : '-',
316 			       (event->mmap2.flags & MAP_SHARED) ? 's' : 'p',
317 			       event->mmap2.filename);
318 	} else {
319 		return fprintf(fp, " %d/%d: [%#" PRI_lx64 "(%#" PRI_lx64 ") @ %#" PRI_lx64
320 				   " %02x:%02x %"PRI_lu64" %"PRI_lu64"]: %c%c%c%c %s\n",
321 			       event->mmap2.pid, event->mmap2.tid, event->mmap2.start,
322 			       event->mmap2.len, event->mmap2.pgoff, event->mmap2.maj,
323 			       event->mmap2.min, event->mmap2.ino,
324 			       event->mmap2.ino_generation,
325 			       (event->mmap2.prot & PROT_READ) ? 'r' : '-',
326 			       (event->mmap2.prot & PROT_WRITE) ? 'w' : '-',
327 			       (event->mmap2.prot & PROT_EXEC) ? 'x' : '-',
328 			       (event->mmap2.flags & MAP_SHARED) ? 's' : 'p',
329 			       event->mmap2.filename);
330 	}
331 }
332 
333 size_t perf_event__fprintf_thread_map(union perf_event *event, FILE *fp)
334 {
335 	struct perf_thread_map *threads = thread_map__new_event(&event->thread_map);
336 	size_t ret;
337 
338 	ret = fprintf(fp, " nr: ");
339 
340 	if (threads)
341 		ret += thread_map__fprintf(threads, fp);
342 	else
343 		ret += fprintf(fp, "failed to get threads from event\n");
344 
345 	perf_thread_map__put(threads);
346 	return ret;
347 }
348 
349 size_t perf_event__fprintf_cpu_map(union perf_event *event, FILE *fp)
350 {
351 	struct perf_cpu_map *cpus = cpu_map__new_data(&event->cpu_map.data);
352 	size_t ret;
353 
354 	ret = fprintf(fp, ": ");
355 
356 	if (cpus)
357 		ret += cpu_map__fprintf(cpus, fp);
358 	else
359 		ret += fprintf(fp, "failed to get cpumap from event\n");
360 
361 	perf_cpu_map__put(cpus);
362 	return ret;
363 }
364 
365 int perf_event__process_mmap(struct perf_tool *tool __maybe_unused,
366 			     union perf_event *event,
367 			     struct perf_sample *sample,
368 			     struct machine *machine)
369 {
370 	return machine__process_mmap_event(machine, event, sample);
371 }
372 
373 int perf_event__process_mmap2(struct perf_tool *tool __maybe_unused,
374 			     union perf_event *event,
375 			     struct perf_sample *sample,
376 			     struct machine *machine)
377 {
378 	return machine__process_mmap2_event(machine, event, sample);
379 }
380 
381 size_t perf_event__fprintf_task(union perf_event *event, FILE *fp)
382 {
383 	return fprintf(fp, "(%d:%d):(%d:%d)\n",
384 		       event->fork.pid, event->fork.tid,
385 		       event->fork.ppid, event->fork.ptid);
386 }
387 
388 int perf_event__process_fork(struct perf_tool *tool __maybe_unused,
389 			     union perf_event *event,
390 			     struct perf_sample *sample,
391 			     struct machine *machine)
392 {
393 	return machine__process_fork_event(machine, event, sample);
394 }
395 
396 int perf_event__process_exit(struct perf_tool *tool __maybe_unused,
397 			     union perf_event *event,
398 			     struct perf_sample *sample,
399 			     struct machine *machine)
400 {
401 	return machine__process_exit_event(machine, event, sample);
402 }
403 
404 size_t perf_event__fprintf_aux(union perf_event *event, FILE *fp)
405 {
406 	return fprintf(fp, " offset: %#"PRI_lx64" size: %#"PRI_lx64" flags: %#"PRI_lx64" [%s%s%s]\n",
407 		       event->aux.aux_offset, event->aux.aux_size,
408 		       event->aux.flags,
409 		       event->aux.flags & PERF_AUX_FLAG_TRUNCATED ? "T" : "",
410 		       event->aux.flags & PERF_AUX_FLAG_OVERWRITE ? "O" : "",
411 		       event->aux.flags & PERF_AUX_FLAG_PARTIAL   ? "P" : "");
412 }
413 
414 size_t perf_event__fprintf_itrace_start(union perf_event *event, FILE *fp)
415 {
416 	return fprintf(fp, " pid: %u tid: %u\n",
417 		       event->itrace_start.pid, event->itrace_start.tid);
418 }
419 
420 size_t perf_event__fprintf_aux_output_hw_id(union perf_event *event, FILE *fp)
421 {
422 	return fprintf(fp, " hw_id: %#"PRI_lx64"\n",
423 		       event->aux_output_hw_id.hw_id);
424 }
425 
426 size_t perf_event__fprintf_switch(union perf_event *event, FILE *fp)
427 {
428 	bool out = event->header.misc & PERF_RECORD_MISC_SWITCH_OUT;
429 	const char *in_out = !out ? "IN         " :
430 		!(event->header.misc & PERF_RECORD_MISC_SWITCH_OUT_PREEMPT) ?
431 				    "OUT        " : "OUT preempt";
432 
433 	if (event->header.type == PERF_RECORD_SWITCH)
434 		return fprintf(fp, " %s\n", in_out);
435 
436 	return fprintf(fp, " %s  %s pid/tid: %5d/%-5d\n",
437 		       in_out, out ? "next" : "prev",
438 		       event->context_switch.next_prev_pid,
439 		       event->context_switch.next_prev_tid);
440 }
441 
442 static size_t perf_event__fprintf_lost(union perf_event *event, FILE *fp)
443 {
444 	return fprintf(fp, " lost %" PRI_lu64 "\n", event->lost.lost);
445 }
446 
447 size_t perf_event__fprintf_ksymbol(union perf_event *event, FILE *fp)
448 {
449 	return fprintf(fp, " addr %" PRI_lx64 " len %u type %u flags 0x%x name %s\n",
450 		       event->ksymbol.addr, event->ksymbol.len,
451 		       event->ksymbol.ksym_type,
452 		       event->ksymbol.flags, event->ksymbol.name);
453 }
454 
455 size_t perf_event__fprintf_bpf(union perf_event *event, FILE *fp)
456 {
457 	return fprintf(fp, " type %u, flags %u, id %u\n",
458 		       event->bpf.type, event->bpf.flags, event->bpf.id);
459 }
460 
461 static int text_poke_printer(enum binary_printer_ops op, unsigned int val,
462 			     void *extra, FILE *fp)
463 {
464 	bool old = *(bool *)extra;
465 
466 	switch ((int)op) {
467 	case BINARY_PRINT_LINE_BEGIN:
468 		return fprintf(fp, "            %s bytes:", old ? "Old" : "New");
469 	case BINARY_PRINT_NUM_DATA:
470 		return fprintf(fp, " %02x", val);
471 	case BINARY_PRINT_LINE_END:
472 		return fprintf(fp, "\n");
473 	default:
474 		return 0;
475 	}
476 }
477 
478 size_t perf_event__fprintf_text_poke(union perf_event *event, struct machine *machine, FILE *fp)
479 {
480 	struct perf_record_text_poke_event *tp = &event->text_poke;
481 	size_t ret;
482 	bool old;
483 
484 	ret = fprintf(fp, " %" PRI_lx64 " ", tp->addr);
485 	if (machine) {
486 		struct addr_location al;
487 
488 		al.map = map__get(maps__find(machine__kernel_maps(machine), tp->addr));
489 		if (al.map && map__load(al.map) >= 0) {
490 			al.addr = map__map_ip(al.map, tp->addr);
491 			al.sym = map__find_symbol(al.map, al.addr);
492 			if (al.sym)
493 				ret += symbol__fprintf_symname_offs(al.sym, &al, fp);
494 		}
495 		map__put(al.map);
496 	}
497 	ret += fprintf(fp, " old len %u new len %u\n", tp->old_len, tp->new_len);
498 	old = true;
499 	ret += binary__fprintf(tp->bytes, tp->old_len, 16, text_poke_printer,
500 			       &old, fp);
501 	old = false;
502 	ret += binary__fprintf(tp->bytes + tp->old_len, tp->new_len, 16,
503 			       text_poke_printer, &old, fp);
504 	return ret;
505 }
506 
507 size_t perf_event__fprintf(union perf_event *event, struct machine *machine, FILE *fp)
508 {
509 	size_t ret = fprintf(fp, "PERF_RECORD_%s",
510 			     perf_event__name(event->header.type));
511 
512 	switch (event->header.type) {
513 	case PERF_RECORD_COMM:
514 		ret += perf_event__fprintf_comm(event, fp);
515 		break;
516 	case PERF_RECORD_FORK:
517 	case PERF_RECORD_EXIT:
518 		ret += perf_event__fprintf_task(event, fp);
519 		break;
520 	case PERF_RECORD_MMAP:
521 		ret += perf_event__fprintf_mmap(event, fp);
522 		break;
523 	case PERF_RECORD_NAMESPACES:
524 		ret += perf_event__fprintf_namespaces(event, fp);
525 		break;
526 	case PERF_RECORD_CGROUP:
527 		ret += perf_event__fprintf_cgroup(event, fp);
528 		break;
529 	case PERF_RECORD_MMAP2:
530 		ret += perf_event__fprintf_mmap2(event, fp);
531 		break;
532 	case PERF_RECORD_AUX:
533 		ret += perf_event__fprintf_aux(event, fp);
534 		break;
535 	case PERF_RECORD_ITRACE_START:
536 		ret += perf_event__fprintf_itrace_start(event, fp);
537 		break;
538 	case PERF_RECORD_SWITCH:
539 	case PERF_RECORD_SWITCH_CPU_WIDE:
540 		ret += perf_event__fprintf_switch(event, fp);
541 		break;
542 	case PERF_RECORD_LOST:
543 		ret += perf_event__fprintf_lost(event, fp);
544 		break;
545 	case PERF_RECORD_KSYMBOL:
546 		ret += perf_event__fprintf_ksymbol(event, fp);
547 		break;
548 	case PERF_RECORD_BPF_EVENT:
549 		ret += perf_event__fprintf_bpf(event, fp);
550 		break;
551 	case PERF_RECORD_TEXT_POKE:
552 		ret += perf_event__fprintf_text_poke(event, machine, fp);
553 		break;
554 	case PERF_RECORD_AUX_OUTPUT_HW_ID:
555 		ret += perf_event__fprintf_aux_output_hw_id(event, fp);
556 		break;
557 	default:
558 		ret += fprintf(fp, "\n");
559 	}
560 
561 	return ret;
562 }
563 
564 int perf_event__process(struct perf_tool *tool __maybe_unused,
565 			union perf_event *event,
566 			struct perf_sample *sample,
567 			struct machine *machine)
568 {
569 	return machine__process_event(machine, event, sample);
570 }
571 
572 struct map *thread__find_map(struct thread *thread, u8 cpumode, u64 addr,
573 			     struct addr_location *al)
574 {
575 	struct maps *maps = thread->maps;
576 	struct machine *machine = maps__machine(maps);
577 	bool load_map = false;
578 
579 	al->maps = maps;
580 	al->thread = thread;
581 	al->addr = addr;
582 	al->cpumode = cpumode;
583 	al->filtered = 0;
584 
585 	if (machine == NULL) {
586 		al->map = NULL;
587 		return NULL;
588 	}
589 
590 	if (cpumode == PERF_RECORD_MISC_KERNEL && perf_host) {
591 		al->level = 'k';
592 		al->maps = maps = machine__kernel_maps(machine);
593 		load_map = true;
594 	} else if (cpumode == PERF_RECORD_MISC_USER && perf_host) {
595 		al->level = '.';
596 	} else if (cpumode == PERF_RECORD_MISC_GUEST_KERNEL && perf_guest) {
597 		al->level = 'g';
598 		al->maps = maps = machine__kernel_maps(machine);
599 		load_map = true;
600 	} else if (cpumode == PERF_RECORD_MISC_GUEST_USER && perf_guest) {
601 		al->level = 'u';
602 	} else {
603 		al->level = 'H';
604 		al->map = NULL;
605 
606 		if ((cpumode == PERF_RECORD_MISC_GUEST_USER ||
607 			cpumode == PERF_RECORD_MISC_GUEST_KERNEL) &&
608 			!perf_guest)
609 			al->filtered |= (1 << HIST_FILTER__GUEST);
610 		if ((cpumode == PERF_RECORD_MISC_USER ||
611 			cpumode == PERF_RECORD_MISC_KERNEL) &&
612 			!perf_host)
613 			al->filtered |= (1 << HIST_FILTER__HOST);
614 
615 		return NULL;
616 	}
617 
618 	al->map = map__get(maps__find(maps, al->addr));
619 	if (al->map != NULL) {
620 		/*
621 		 * Kernel maps might be changed when loading symbols so loading
622 		 * must be done prior to using kernel maps.
623 		 */
624 		if (load_map)
625 			map__load(al->map);
626 		al->addr = map__map_ip(al->map, al->addr);
627 	}
628 
629 	return al->map;
630 }
631 
632 /*
633  * For branch stacks or branch samples, the sample cpumode might not be correct
634  * because it applies only to the sample 'ip' and not necessary to 'addr' or
635  * branch stack addresses. If possible, use a fallback to deal with those cases.
636  */
637 struct map *thread__find_map_fb(struct thread *thread, u8 cpumode, u64 addr,
638 				struct addr_location *al)
639 {
640 	struct map *map = thread__find_map(thread, cpumode, addr, al);
641 	struct machine *machine = maps__machine(thread->maps);
642 	u8 addr_cpumode = machine__addr_cpumode(machine, cpumode, addr);
643 
644 	if (map || addr_cpumode == cpumode)
645 		return map;
646 
647 	return thread__find_map(thread, addr_cpumode, addr, al);
648 }
649 
650 struct symbol *thread__find_symbol(struct thread *thread, u8 cpumode,
651 				   u64 addr, struct addr_location *al)
652 {
653 	al->sym = NULL;
654 	if (thread__find_map(thread, cpumode, addr, al))
655 		al->sym = map__find_symbol(al->map, al->addr);
656 	return al->sym;
657 }
658 
659 struct symbol *thread__find_symbol_fb(struct thread *thread, u8 cpumode,
660 				      u64 addr, struct addr_location *al)
661 {
662 	al->sym = NULL;
663 	if (thread__find_map_fb(thread, cpumode, addr, al))
664 		al->sym = map__find_symbol(al->map, al->addr);
665 	return al->sym;
666 }
667 
668 static bool check_address_range(struct intlist *addr_list, int addr_range,
669 				unsigned long addr)
670 {
671 	struct int_node *pos;
672 
673 	intlist__for_each_entry(pos, addr_list) {
674 		if (addr >= pos->i && addr < pos->i + addr_range)
675 			return true;
676 	}
677 
678 	return false;
679 }
680 
681 /*
682  * Callers need to drop the reference to al->thread, obtained in
683  * machine__findnew_thread()
684  */
685 int machine__resolve(struct machine *machine, struct addr_location *al,
686 		     struct perf_sample *sample)
687 {
688 	struct thread *thread;
689 	struct dso *dso;
690 
691 	if (symbol_conf.guest_code && !machine__is_host(machine))
692 		thread = machine__findnew_guest_code(machine, sample->pid);
693 	else
694 		thread = machine__findnew_thread(machine, sample->pid, sample->tid);
695 	if (thread == NULL)
696 		return -1;
697 
698 	dump_printf(" ... thread: %s:%d\n", thread__comm_str(thread), thread->tid);
699 	thread__find_map(thread, sample->cpumode, sample->ip, al);
700 	dso = al->map ? map__dso(al->map) : NULL;
701 	dump_printf(" ...... dso: %s\n",
702 		dso
703 		? dso->long_name
704 		: (al->level == 'H' ? "[hypervisor]" : "<not found>"));
705 
706 	if (thread__is_filtered(thread))
707 		al->filtered |= (1 << HIST_FILTER__THREAD);
708 
709 	al->sym = NULL;
710 	al->cpu = sample->cpu;
711 	al->socket = -1;
712 	al->srcline = NULL;
713 
714 	if (al->cpu >= 0) {
715 		struct perf_env *env = machine->env;
716 
717 		if (env && env->cpu)
718 			al->socket = env->cpu[al->cpu].socket_id;
719 	}
720 
721 	if (al->map) {
722 		if (symbol_conf.dso_list &&
723 		    (!dso || !(strlist__has_entry(symbol_conf.dso_list,
724 						  dso->short_name) ||
725 			       (dso->short_name != dso->long_name &&
726 				strlist__has_entry(symbol_conf.dso_list,
727 						   dso->long_name))))) {
728 			al->filtered |= (1 << HIST_FILTER__DSO);
729 		}
730 
731 		al->sym = map__find_symbol(al->map, al->addr);
732 	} else if (symbol_conf.dso_list) {
733 		al->filtered |= (1 << HIST_FILTER__DSO);
734 	}
735 
736 	if (symbol_conf.sym_list) {
737 		int ret = 0;
738 		char al_addr_str[32];
739 		size_t sz = sizeof(al_addr_str);
740 
741 		if (al->sym) {
742 			ret = strlist__has_entry(symbol_conf.sym_list,
743 						al->sym->name);
744 		}
745 		if (!ret && al->sym) {
746 			snprintf(al_addr_str, sz, "0x%"PRIx64,
747 				 map__unmap_ip(al->map, al->sym->start));
748 			ret = strlist__has_entry(symbol_conf.sym_list,
749 						al_addr_str);
750 		}
751 		if (!ret && symbol_conf.addr_list && al->map) {
752 			unsigned long addr = map__unmap_ip(al->map, al->addr);
753 
754 			ret = intlist__has_entry(symbol_conf.addr_list, addr);
755 			if (!ret && symbol_conf.addr_range) {
756 				ret = check_address_range(symbol_conf.addr_list,
757 							  symbol_conf.addr_range,
758 							  addr);
759 			}
760 		}
761 
762 		if (!ret)
763 			al->filtered |= (1 << HIST_FILTER__SYMBOL);
764 	}
765 
766 	return 0;
767 }
768 
769 /*
770  * The preprocess_sample method will return with reference counts for the
771  * in it, when done using (and perhaps getting ref counts if needing to
772  * keep a pointer to one of those entries) it must be paired with
773  * addr_location__put(), so that the refcounts can be decremented.
774  */
775 void addr_location__put(struct addr_location *al)
776 {
777 	map__zput(al->map);
778 	thread__zput(al->thread);
779 }
780 
781 bool is_bts_event(struct perf_event_attr *attr)
782 {
783 	return attr->type == PERF_TYPE_HARDWARE &&
784 	       (attr->config & PERF_COUNT_HW_BRANCH_INSTRUCTIONS) &&
785 	       attr->sample_period == 1;
786 }
787 
788 bool sample_addr_correlates_sym(struct perf_event_attr *attr)
789 {
790 	if (attr->type == PERF_TYPE_SOFTWARE &&
791 	    (attr->config == PERF_COUNT_SW_PAGE_FAULTS ||
792 	     attr->config == PERF_COUNT_SW_PAGE_FAULTS_MIN ||
793 	     attr->config == PERF_COUNT_SW_PAGE_FAULTS_MAJ))
794 		return true;
795 
796 	if (is_bts_event(attr))
797 		return true;
798 
799 	return false;
800 }
801 
802 void thread__resolve(struct thread *thread, struct addr_location *al,
803 		     struct perf_sample *sample)
804 {
805 	thread__find_map_fb(thread, sample->cpumode, sample->addr, al);
806 
807 	al->cpu = sample->cpu;
808 	al->sym = NULL;
809 
810 	if (al->map)
811 		al->sym = map__find_symbol(al->map, al->addr);
812 }
813