ce6f5116238670c0b5f737533cc65ef3f924d220
[~shefty/rdma-dev.git] / tools / perf / util / session.c
1 #define _FILE_OFFSET_BITS 64
2
3 #include <linux/kernel.h>
4
5 #include <byteswap.h>
6 #include <unistd.h>
7 #include <sys/types.h>
8 #include <sys/mman.h>
9
10 #include "evlist.h"
11 #include "evsel.h"
12 #include "session.h"
13 #include "tool.h"
14 #include "sort.h"
15 #include "util.h"
16 #include "cpumap.h"
17 #include "event-parse.h"
18 #include "perf_regs.h"
19 #include "unwind.h"
20 #include "vdso.h"
21
22 static int perf_session__open(struct perf_session *self, bool force)
23 {
24         struct stat input_stat;
25
26         if (!strcmp(self->filename, "-")) {
27                 self->fd_pipe = true;
28                 self->fd = STDIN_FILENO;
29
30                 if (perf_session__read_header(self, self->fd) < 0)
31                         pr_err("incompatible file format (rerun with -v to learn more)");
32
33                 return 0;
34         }
35
36         self->fd = open(self->filename, O_RDONLY);
37         if (self->fd < 0) {
38                 int err = errno;
39
40                 pr_err("failed to open %s: %s", self->filename, strerror(err));
41                 if (err == ENOENT && !strcmp(self->filename, "perf.data"))
42                         pr_err("  (try 'perf record' first)");
43                 pr_err("\n");
44                 return -errno;
45         }
46
47         if (fstat(self->fd, &input_stat) < 0)
48                 goto out_close;
49
50         if (!force && input_stat.st_uid && (input_stat.st_uid != geteuid())) {
51                 pr_err("file %s not owned by current user or root\n",
52                        self->filename);
53                 goto out_close;
54         }
55
56         if (!input_stat.st_size) {
57                 pr_info("zero-sized file (%s), nothing to do!\n",
58                         self->filename);
59                 goto out_close;
60         }
61
62         if (perf_session__read_header(self, self->fd) < 0) {
63                 pr_err("incompatible file format (rerun with -v to learn more)");
64                 goto out_close;
65         }
66
67         if (!perf_evlist__valid_sample_type(self->evlist)) {
68                 pr_err("non matching sample_type");
69                 goto out_close;
70         }
71
72         if (!perf_evlist__valid_sample_id_all(self->evlist)) {
73                 pr_err("non matching sample_id_all");
74                 goto out_close;
75         }
76
77         self->size = input_stat.st_size;
78         return 0;
79
80 out_close:
81         close(self->fd);
82         self->fd = -1;
83         return -1;
84 }
85
86 void perf_session__set_id_hdr_size(struct perf_session *session)
87 {
88         u16 id_hdr_size = perf_evlist__id_hdr_size(session->evlist);
89
90         session->host_machine.id_hdr_size = id_hdr_size;
91         machines__set_id_hdr_size(&session->machines, id_hdr_size);
92 }
93
94 int perf_session__create_kernel_maps(struct perf_session *self)
95 {
96         int ret = machine__create_kernel_maps(&self->host_machine);
97
98         if (ret >= 0)
99                 ret = machines__create_guest_kernel_maps(&self->machines);
100         return ret;
101 }
102
103 static void perf_session__destroy_kernel_maps(struct perf_session *self)
104 {
105         machine__destroy_kernel_maps(&self->host_machine);
106         machines__destroy_guest_kernel_maps(&self->machines);
107 }
108
109 struct perf_session *perf_session__new(const char *filename, int mode,
110                                        bool force, bool repipe,
111                                        struct perf_tool *tool)
112 {
113         struct perf_session *self;
114         struct stat st;
115         size_t len;
116
117         if (!filename || !strlen(filename)) {
118                 if (!fstat(STDIN_FILENO, &st) && S_ISFIFO(st.st_mode))
119                         filename = "-";
120                 else
121                         filename = "perf.data";
122         }
123
124         len = strlen(filename);
125         self = zalloc(sizeof(*self) + len);
126
127         if (self == NULL)
128                 goto out;
129
130         memcpy(self->filename, filename, len);
131         /*
132          * On 64bit we can mmap the data file in one go. No need for tiny mmap
133          * slices. On 32bit we use 32MB.
134          */
135 #if BITS_PER_LONG == 64
136         self->mmap_window = ULLONG_MAX;
137 #else
138         self->mmap_window = 32 * 1024 * 1024ULL;
139 #endif
140         self->machines = RB_ROOT;
141         self->repipe = repipe;
142         INIT_LIST_HEAD(&self->ordered_samples.samples);
143         INIT_LIST_HEAD(&self->ordered_samples.sample_cache);
144         INIT_LIST_HEAD(&self->ordered_samples.to_free);
145         machine__init(&self->host_machine, "", HOST_KERNEL_ID);
146         hists__init(&self->hists);
147
148         if (mode == O_RDONLY) {
149                 if (perf_session__open(self, force) < 0)
150                         goto out_delete;
151                 perf_session__set_id_hdr_size(self);
152         } else if (mode == O_WRONLY) {
153                 /*
154                  * In O_RDONLY mode this will be performed when reading the
155                  * kernel MMAP event, in perf_event__process_mmap().
156                  */
157                 if (perf_session__create_kernel_maps(self) < 0)
158                         goto out_delete;
159         }
160
161         if (tool && tool->ordering_requires_timestamps &&
162             tool->ordered_samples && !perf_evlist__sample_id_all(self->evlist)) {
163                 dump_printf("WARNING: No sample_id_all support, falling back to unordered processing\n");
164                 tool->ordered_samples = false;
165         }
166
167 out:
168         return self;
169 out_delete:
170         perf_session__delete(self);
171         return NULL;
172 }
173
174 static void machine__delete_dead_threads(struct machine *machine)
175 {
176         struct thread *n, *t;
177
178         list_for_each_entry_safe(t, n, &machine->dead_threads, node) {
179                 list_del(&t->node);
180                 thread__delete(t);
181         }
182 }
183
184 static void perf_session__delete_dead_threads(struct perf_session *session)
185 {
186         machine__delete_dead_threads(&session->host_machine);
187 }
188
189 static void machine__delete_threads(struct machine *self)
190 {
191         struct rb_node *nd = rb_first(&self->threads);
192
193         while (nd) {
194                 struct thread *t = rb_entry(nd, struct thread, rb_node);
195
196                 rb_erase(&t->rb_node, &self->threads);
197                 nd = rb_next(nd);
198                 thread__delete(t);
199         }
200 }
201
202 static void perf_session__delete_threads(struct perf_session *session)
203 {
204         machine__delete_threads(&session->host_machine);
205 }
206
207 void perf_session__delete(struct perf_session *self)
208 {
209         perf_session__destroy_kernel_maps(self);
210         perf_session__delete_dead_threads(self);
211         perf_session__delete_threads(self);
212         machine__exit(&self->host_machine);
213         close(self->fd);
214         free(self);
215         vdso__exit();
216 }
217
218 void machine__remove_thread(struct machine *self, struct thread *th)
219 {
220         self->last_match = NULL;
221         rb_erase(&th->rb_node, &self->threads);
222         /*
223          * We may have references to this thread, for instance in some hist_entry
224          * instances, so just move them to a separate list.
225          */
226         list_add_tail(&th->node, &self->dead_threads);
227 }
228
229 static bool symbol__match_parent_regex(struct symbol *sym)
230 {
231         if (sym->name && !regexec(&parent_regex, sym->name, 0, NULL, 0))
232                 return 1;
233
234         return 0;
235 }
236
237 static const u8 cpumodes[] = {
238         PERF_RECORD_MISC_USER,
239         PERF_RECORD_MISC_KERNEL,
240         PERF_RECORD_MISC_GUEST_USER,
241         PERF_RECORD_MISC_GUEST_KERNEL
242 };
243 #define NCPUMODES (sizeof(cpumodes)/sizeof(u8))
244
245 static void ip__resolve_ams(struct machine *self, struct thread *thread,
246                             struct addr_map_symbol *ams,
247                             u64 ip)
248 {
249         struct addr_location al;
250         size_t i;
251         u8 m;
252
253         memset(&al, 0, sizeof(al));
254
255         for (i = 0; i < NCPUMODES; i++) {
256                 m = cpumodes[i];
257                 /*
258                  * We cannot use the header.misc hint to determine whether a
259                  * branch stack address is user, kernel, guest, hypervisor.
260                  * Branches may straddle the kernel/user/hypervisor boundaries.
261                  * Thus, we have to try consecutively until we find a match
262                  * or else, the symbol is unknown
263                  */
264                 thread__find_addr_location(thread, self, m, MAP__FUNCTION,
265                                 ip, &al, NULL);
266                 if (al.sym)
267                         goto found;
268         }
269 found:
270         ams->addr = ip;
271         ams->al_addr = al.addr;
272         ams->sym = al.sym;
273         ams->map = al.map;
274 }
275
276 struct branch_info *machine__resolve_bstack(struct machine *self,
277                                             struct thread *thr,
278                                             struct branch_stack *bs)
279 {
280         struct branch_info *bi;
281         unsigned int i;
282
283         bi = calloc(bs->nr, sizeof(struct branch_info));
284         if (!bi)
285                 return NULL;
286
287         for (i = 0; i < bs->nr; i++) {
288                 ip__resolve_ams(self, thr, &bi[i].to, bs->entries[i].to);
289                 ip__resolve_ams(self, thr, &bi[i].from, bs->entries[i].from);
290                 bi[i].flags = bs->entries[i].flags;
291         }
292         return bi;
293 }
294
295 static int machine__resolve_callchain_sample(struct machine *machine,
296                                              struct thread *thread,
297                                              struct ip_callchain *chain,
298                                              struct symbol **parent)
299
300 {
301         u8 cpumode = PERF_RECORD_MISC_USER;
302         unsigned int i;
303         int err;
304
305         callchain_cursor_reset(&callchain_cursor);
306
307         if (chain->nr > PERF_MAX_STACK_DEPTH) {
308                 pr_warning("corrupted callchain. skipping...\n");
309                 return 0;
310         }
311
312         for (i = 0; i < chain->nr; i++) {
313                 u64 ip;
314                 struct addr_location al;
315
316                 if (callchain_param.order == ORDER_CALLEE)
317                         ip = chain->ips[i];
318                 else
319                         ip = chain->ips[chain->nr - i - 1];
320
321                 if (ip >= PERF_CONTEXT_MAX) {
322                         switch (ip) {
323                         case PERF_CONTEXT_HV:
324                                 cpumode = PERF_RECORD_MISC_HYPERVISOR;
325                                 break;
326                         case PERF_CONTEXT_KERNEL:
327                                 cpumode = PERF_RECORD_MISC_KERNEL;
328                                 break;
329                         case PERF_CONTEXT_USER:
330                                 cpumode = PERF_RECORD_MISC_USER;
331                                 break;
332                         default:
333                                 pr_debug("invalid callchain context: "
334                                          "%"PRId64"\n", (s64) ip);
335                                 /*
336                                  * It seems the callchain is corrupted.
337                                  * Discard all.
338                                  */
339                                 callchain_cursor_reset(&callchain_cursor);
340                                 return 0;
341                         }
342                         continue;
343                 }
344
345                 al.filtered = false;
346                 thread__find_addr_location(thread, machine, cpumode,
347                                            MAP__FUNCTION, ip, &al, NULL);
348                 if (al.sym != NULL) {
349                         if (sort__has_parent && !*parent &&
350                             symbol__match_parent_regex(al.sym))
351                                 *parent = al.sym;
352                         if (!symbol_conf.use_callchain)
353                                 break;
354                 }
355
356                 err = callchain_cursor_append(&callchain_cursor,
357                                               ip, al.map, al.sym);
358                 if (err)
359                         return err;
360         }
361
362         return 0;
363 }
364
365 static int unwind_entry(struct unwind_entry *entry, void *arg)
366 {
367         struct callchain_cursor *cursor = arg;
368         return callchain_cursor_append(cursor, entry->ip,
369                                        entry->map, entry->sym);
370 }
371
372 int machine__resolve_callchain(struct machine *machine,
373                                struct perf_evsel *evsel,
374                                struct thread *thread,
375                                struct perf_sample *sample,
376                                struct symbol **parent)
377
378 {
379         int ret;
380
381         callchain_cursor_reset(&callchain_cursor);
382
383         ret = machine__resolve_callchain_sample(machine, thread,
384                                                 sample->callchain, parent);
385         if (ret)
386                 return ret;
387
388         /* Can we do dwarf post unwind? */
389         if (!((evsel->attr.sample_type & PERF_SAMPLE_REGS_USER) &&
390               (evsel->attr.sample_type & PERF_SAMPLE_STACK_USER)))
391                 return 0;
392
393         /* Bail out if nothing was captured. */
394         if ((!sample->user_regs.regs) ||
395             (!sample->user_stack.size))
396                 return 0;
397
398         return unwind__get_entries(unwind_entry, &callchain_cursor, machine,
399                                    thread, evsel->attr.sample_regs_user,
400                                    sample);
401
402 }
403
404 static int process_event_synth_tracing_data_stub(union perf_event *event
405                                                  __maybe_unused,
406                                                  struct perf_session *session
407                                                 __maybe_unused)
408 {
409         dump_printf(": unhandled!\n");
410         return 0;
411 }
412
413 static int process_event_synth_attr_stub(union perf_event *event __maybe_unused,
414                                          struct perf_evlist **pevlist
415                                          __maybe_unused)
416 {
417         dump_printf(": unhandled!\n");
418         return 0;
419 }
420
421 static int process_event_sample_stub(struct perf_tool *tool __maybe_unused,
422                                      union perf_event *event __maybe_unused,
423                                      struct perf_sample *sample __maybe_unused,
424                                      struct perf_evsel *evsel __maybe_unused,
425                                      struct machine *machine __maybe_unused)
426 {
427         dump_printf(": unhandled!\n");
428         return 0;
429 }
430
431 static int process_event_stub(struct perf_tool *tool __maybe_unused,
432                               union perf_event *event __maybe_unused,
433                               struct perf_sample *sample __maybe_unused,
434                               struct machine *machine __maybe_unused)
435 {
436         dump_printf(": unhandled!\n");
437         return 0;
438 }
439
440 static int process_finished_round_stub(struct perf_tool *tool __maybe_unused,
441                                        union perf_event *event __maybe_unused,
442                                        struct perf_session *perf_session
443                                        __maybe_unused)
444 {
445         dump_printf(": unhandled!\n");
446         return 0;
447 }
448
449 static int process_event_type_stub(struct perf_tool *tool __maybe_unused,
450                                    union perf_event *event __maybe_unused)
451 {
452         dump_printf(": unhandled!\n");
453         return 0;
454 }
455
456 static int process_finished_round(struct perf_tool *tool,
457                                   union perf_event *event,
458                                   struct perf_session *session);
459
460 static void perf_tool__fill_defaults(struct perf_tool *tool)
461 {
462         if (tool->sample == NULL)
463                 tool->sample = process_event_sample_stub;
464         if (tool->mmap == NULL)
465                 tool->mmap = process_event_stub;
466         if (tool->comm == NULL)
467                 tool->comm = process_event_stub;
468         if (tool->fork == NULL)
469                 tool->fork = process_event_stub;
470         if (tool->exit == NULL)
471                 tool->exit = process_event_stub;
472         if (tool->lost == NULL)
473                 tool->lost = perf_event__process_lost;
474         if (tool->read == NULL)
475                 tool->read = process_event_sample_stub;
476         if (tool->throttle == NULL)
477                 tool->throttle = process_event_stub;
478         if (tool->unthrottle == NULL)
479                 tool->unthrottle = process_event_stub;
480         if (tool->attr == NULL)
481                 tool->attr = process_event_synth_attr_stub;
482         if (tool->event_type == NULL)
483                 tool->event_type = process_event_type_stub;
484         if (tool->tracing_data == NULL)
485                 tool->tracing_data = process_event_synth_tracing_data_stub;
486         if (tool->build_id == NULL)
487                 tool->build_id = process_finished_round_stub;
488         if (tool->finished_round == NULL) {
489                 if (tool->ordered_samples)
490                         tool->finished_round = process_finished_round;
491                 else
492                         tool->finished_round = process_finished_round_stub;
493         }
494 }
495  
496 void mem_bswap_32(void *src, int byte_size)
497 {
498         u32 *m = src;
499         while (byte_size > 0) {
500                 *m = bswap_32(*m);
501                 byte_size -= sizeof(u32);
502                 ++m;
503         }
504 }
505
506 void mem_bswap_64(void *src, int byte_size)
507 {
508         u64 *m = src;
509
510         while (byte_size > 0) {
511                 *m = bswap_64(*m);
512                 byte_size -= sizeof(u64);
513                 ++m;
514         }
515 }
516
517 static void swap_sample_id_all(union perf_event *event, void *data)
518 {
519         void *end = (void *) event + event->header.size;
520         int size = end - data;
521
522         BUG_ON(size % sizeof(u64));
523         mem_bswap_64(data, size);
524 }
525
526 static void perf_event__all64_swap(union perf_event *event,
527                                    bool sample_id_all __maybe_unused)
528 {
529         struct perf_event_header *hdr = &event->header;
530         mem_bswap_64(hdr + 1, event->header.size - sizeof(*hdr));
531 }
532
533 static void perf_event__comm_swap(union perf_event *event, bool sample_id_all)
534 {
535         event->comm.pid = bswap_32(event->comm.pid);
536         event->comm.tid = bswap_32(event->comm.tid);
537
538         if (sample_id_all) {
539                 void *data = &event->comm.comm;
540
541                 data += PERF_ALIGN(strlen(data) + 1, sizeof(u64));
542                 swap_sample_id_all(event, data);
543         }
544 }
545
546 static void perf_event__mmap_swap(union perf_event *event,
547                                   bool sample_id_all)
548 {
549         event->mmap.pid   = bswap_32(event->mmap.pid);
550         event->mmap.tid   = bswap_32(event->mmap.tid);
551         event->mmap.start = bswap_64(event->mmap.start);
552         event->mmap.len   = bswap_64(event->mmap.len);
553         event->mmap.pgoff = bswap_64(event->mmap.pgoff);
554
555         if (sample_id_all) {
556                 void *data = &event->mmap.filename;
557
558                 data += PERF_ALIGN(strlen(data) + 1, sizeof(u64));
559                 swap_sample_id_all(event, data);
560         }
561 }
562
563 static void perf_event__task_swap(union perf_event *event, bool sample_id_all)
564 {
565         event->fork.pid  = bswap_32(event->fork.pid);
566         event->fork.tid  = bswap_32(event->fork.tid);
567         event->fork.ppid = bswap_32(event->fork.ppid);
568         event->fork.ptid = bswap_32(event->fork.ptid);
569         event->fork.time = bswap_64(event->fork.time);
570
571         if (sample_id_all)
572                 swap_sample_id_all(event, &event->fork + 1);
573 }
574
575 static void perf_event__read_swap(union perf_event *event, bool sample_id_all)
576 {
577         event->read.pid          = bswap_32(event->read.pid);
578         event->read.tid          = bswap_32(event->read.tid);
579         event->read.value        = bswap_64(event->read.value);
580         event->read.time_enabled = bswap_64(event->read.time_enabled);
581         event->read.time_running = bswap_64(event->read.time_running);
582         event->read.id           = bswap_64(event->read.id);
583
584         if (sample_id_all)
585                 swap_sample_id_all(event, &event->read + 1);
586 }
587
588 static u8 revbyte(u8 b)
589 {
590         int rev = (b >> 4) | ((b & 0xf) << 4);
591         rev = ((rev & 0xcc) >> 2) | ((rev & 0x33) << 2);
592         rev = ((rev & 0xaa) >> 1) | ((rev & 0x55) << 1);
593         return (u8) rev;
594 }
595
596 /*
597  * XXX this is hack in attempt to carry flags bitfield
598  * throught endian village. ABI says:
599  *
600  * Bit-fields are allocated from right to left (least to most significant)
601  * on little-endian implementations and from left to right (most to least
602  * significant) on big-endian implementations.
603  *
604  * The above seems to be byte specific, so we need to reverse each
605  * byte of the bitfield. 'Internet' also says this might be implementation
606  * specific and we probably need proper fix and carry perf_event_attr
607  * bitfield flags in separate data file FEAT_ section. Thought this seems
608  * to work for now.
609  */
610 static void swap_bitfield(u8 *p, unsigned len)
611 {
612         unsigned i;
613
614         for (i = 0; i < len; i++) {
615                 *p = revbyte(*p);
616                 p++;
617         }
618 }
619
620 /* exported for swapping attributes in file header */
621 void perf_event__attr_swap(struct perf_event_attr *attr)
622 {
623         attr->type              = bswap_32(attr->type);
624         attr->size              = bswap_32(attr->size);
625         attr->config            = bswap_64(attr->config);
626         attr->sample_period     = bswap_64(attr->sample_period);
627         attr->sample_type       = bswap_64(attr->sample_type);
628         attr->read_format       = bswap_64(attr->read_format);
629         attr->wakeup_events     = bswap_32(attr->wakeup_events);
630         attr->bp_type           = bswap_32(attr->bp_type);
631         attr->bp_addr           = bswap_64(attr->bp_addr);
632         attr->bp_len            = bswap_64(attr->bp_len);
633
634         swap_bitfield((u8 *) (&attr->read_format + 1), sizeof(u64));
635 }
636
637 static void perf_event__hdr_attr_swap(union perf_event *event,
638                                       bool sample_id_all __maybe_unused)
639 {
640         size_t size;
641
642         perf_event__attr_swap(&event->attr.attr);
643
644         size = event->header.size;
645         size -= (void *)&event->attr.id - (void *)event;
646         mem_bswap_64(event->attr.id, size);
647 }
648
649 static void perf_event__event_type_swap(union perf_event *event,
650                                         bool sample_id_all __maybe_unused)
651 {
652         event->event_type.event_type.event_id =
653                 bswap_64(event->event_type.event_type.event_id);
654 }
655
656 static void perf_event__tracing_data_swap(union perf_event *event,
657                                           bool sample_id_all __maybe_unused)
658 {
659         event->tracing_data.size = bswap_32(event->tracing_data.size);
660 }
661
662 typedef void (*perf_event__swap_op)(union perf_event *event,
663                                     bool sample_id_all);
664
665 static perf_event__swap_op perf_event__swap_ops[] = {
666         [PERF_RECORD_MMAP]                = perf_event__mmap_swap,
667         [PERF_RECORD_COMM]                = perf_event__comm_swap,
668         [PERF_RECORD_FORK]                = perf_event__task_swap,
669         [PERF_RECORD_EXIT]                = perf_event__task_swap,
670         [PERF_RECORD_LOST]                = perf_event__all64_swap,
671         [PERF_RECORD_READ]                = perf_event__read_swap,
672         [PERF_RECORD_SAMPLE]              = perf_event__all64_swap,
673         [PERF_RECORD_HEADER_ATTR]         = perf_event__hdr_attr_swap,
674         [PERF_RECORD_HEADER_EVENT_TYPE]   = perf_event__event_type_swap,
675         [PERF_RECORD_HEADER_TRACING_DATA] = perf_event__tracing_data_swap,
676         [PERF_RECORD_HEADER_BUILD_ID]     = NULL,
677         [PERF_RECORD_HEADER_MAX]          = NULL,
678 };
679
680 struct sample_queue {
681         u64                     timestamp;
682         u64                     file_offset;
683         union perf_event        *event;
684         struct list_head        list;
685 };
686
687 static void perf_session_free_sample_buffers(struct perf_session *session)
688 {
689         struct ordered_samples *os = &session->ordered_samples;
690
691         while (!list_empty(&os->to_free)) {
692                 struct sample_queue *sq;
693
694                 sq = list_entry(os->to_free.next, struct sample_queue, list);
695                 list_del(&sq->list);
696                 free(sq);
697         }
698 }
699
700 static int perf_session_deliver_event(struct perf_session *session,
701                                       union perf_event *event,
702                                       struct perf_sample *sample,
703                                       struct perf_tool *tool,
704                                       u64 file_offset);
705
706 static int flush_sample_queue(struct perf_session *s,
707                                struct perf_tool *tool)
708 {
709         struct ordered_samples *os = &s->ordered_samples;
710         struct list_head *head = &os->samples;
711         struct sample_queue *tmp, *iter;
712         struct perf_sample sample;
713         u64 limit = os->next_flush;
714         u64 last_ts = os->last_sample ? os->last_sample->timestamp : 0ULL;
715         unsigned idx = 0, progress_next = os->nr_samples / 16;
716         int ret;
717
718         if (!tool->ordered_samples || !limit)
719                 return 0;
720
721         list_for_each_entry_safe(iter, tmp, head, list) {
722                 if (iter->timestamp > limit)
723                         break;
724
725                 ret = perf_evlist__parse_sample(s->evlist, iter->event, &sample);
726                 if (ret)
727                         pr_err("Can't parse sample, err = %d\n", ret);
728                 else {
729                         ret = perf_session_deliver_event(s, iter->event, &sample, tool,
730                                                          iter->file_offset);
731                         if (ret)
732                                 return ret;
733                 }
734
735                 os->last_flush = iter->timestamp;
736                 list_del(&iter->list);
737                 list_add(&iter->list, &os->sample_cache);
738                 if (++idx >= progress_next) {
739                         progress_next += os->nr_samples / 16;
740                         ui_progress__update(idx, os->nr_samples,
741                                             "Processing time ordered events...");
742                 }
743         }
744
745         if (list_empty(head)) {
746                 os->last_sample = NULL;
747         } else if (last_ts <= limit) {
748                 os->last_sample =
749                         list_entry(head->prev, struct sample_queue, list);
750         }
751
752         os->nr_samples = 0;
753
754         return 0;
755 }
756
757 /*
758  * When perf record finishes a pass on every buffers, it records this pseudo
759  * event.
760  * We record the max timestamp t found in the pass n.
761  * Assuming these timestamps are monotonic across cpus, we know that if
762  * a buffer still has events with timestamps below t, they will be all
763  * available and then read in the pass n + 1.
764  * Hence when we start to read the pass n + 2, we can safely flush every
765  * events with timestamps below t.
766  *
767  *    ============ PASS n =================
768  *       CPU 0         |   CPU 1
769  *                     |
770  *    cnt1 timestamps  |   cnt2 timestamps
771  *          1          |         2
772  *          2          |         3
773  *          -          |         4  <--- max recorded
774  *
775  *    ============ PASS n + 1 ==============
776  *       CPU 0         |   CPU 1
777  *                     |
778  *    cnt1 timestamps  |   cnt2 timestamps
779  *          3          |         5
780  *          4          |         6
781  *          5          |         7 <---- max recorded
782  *
783  *      Flush every events below timestamp 4
784  *
785  *    ============ PASS n + 2 ==============
786  *       CPU 0         |   CPU 1
787  *                     |
788  *    cnt1 timestamps  |   cnt2 timestamps
789  *          6          |         8
790  *          7          |         9
791  *          -          |         10
792  *
793  *      Flush every events below timestamp 7
794  *      etc...
795  */
796 static int process_finished_round(struct perf_tool *tool,
797                                   union perf_event *event __maybe_unused,
798                                   struct perf_session *session)
799 {
800         int ret = flush_sample_queue(session, tool);
801         if (!ret)
802                 session->ordered_samples.next_flush = session->ordered_samples.max_timestamp;
803
804         return ret;
805 }
806
807 /* The queue is ordered by time */
808 static void __queue_event(struct sample_queue *new, struct perf_session *s)
809 {
810         struct ordered_samples *os = &s->ordered_samples;
811         struct sample_queue *sample = os->last_sample;
812         u64 timestamp = new->timestamp;
813         struct list_head *p;
814
815         ++os->nr_samples;
816         os->last_sample = new;
817
818         if (!sample) {
819                 list_add(&new->list, &os->samples);
820                 os->max_timestamp = timestamp;
821                 return;
822         }
823
824         /*
825          * last_sample might point to some random place in the list as it's
826          * the last queued event. We expect that the new event is close to
827          * this.
828          */
829         if (sample->timestamp <= timestamp) {
830                 while (sample->timestamp <= timestamp) {
831                         p = sample->list.next;
832                         if (p == &os->samples) {
833                                 list_add_tail(&new->list, &os->samples);
834                                 os->max_timestamp = timestamp;
835                                 return;
836                         }
837                         sample = list_entry(p, struct sample_queue, list);
838                 }
839                 list_add_tail(&new->list, &sample->list);
840         } else {
841                 while (sample->timestamp > timestamp) {
842                         p = sample->list.prev;
843                         if (p == &os->samples) {
844                                 list_add(&new->list, &os->samples);
845                                 return;
846                         }
847                         sample = list_entry(p, struct sample_queue, list);
848                 }
849                 list_add(&new->list, &sample->list);
850         }
851 }
852
853 #define MAX_SAMPLE_BUFFER       (64 * 1024 / sizeof(struct sample_queue))
854
855 static int perf_session_queue_event(struct perf_session *s, union perf_event *event,
856                                     struct perf_sample *sample, u64 file_offset)
857 {
858         struct ordered_samples *os = &s->ordered_samples;
859         struct list_head *sc = &os->sample_cache;
860         u64 timestamp = sample->time;
861         struct sample_queue *new;
862
863         if (!timestamp || timestamp == ~0ULL)
864                 return -ETIME;
865
866         if (timestamp < s->ordered_samples.last_flush) {
867                 printf("Warning: Timestamp below last timeslice flush\n");
868                 return -EINVAL;
869         }
870
871         if (!list_empty(sc)) {
872                 new = list_entry(sc->next, struct sample_queue, list);
873                 list_del(&new->list);
874         } else if (os->sample_buffer) {
875                 new = os->sample_buffer + os->sample_buffer_idx;
876                 if (++os->sample_buffer_idx == MAX_SAMPLE_BUFFER)
877                         os->sample_buffer = NULL;
878         } else {
879                 os->sample_buffer = malloc(MAX_SAMPLE_BUFFER * sizeof(*new));
880                 if (!os->sample_buffer)
881                         return -ENOMEM;
882                 list_add(&os->sample_buffer->list, &os->to_free);
883                 os->sample_buffer_idx = 2;
884                 new = os->sample_buffer + 1;
885         }
886
887         new->timestamp = timestamp;
888         new->file_offset = file_offset;
889         new->event = event;
890
891         __queue_event(new, s);
892
893         return 0;
894 }
895
896 static void callchain__printf(struct perf_sample *sample)
897 {
898         unsigned int i;
899
900         printf("... chain: nr:%" PRIu64 "\n", sample->callchain->nr);
901
902         for (i = 0; i < sample->callchain->nr; i++)
903                 printf("..... %2d: %016" PRIx64 "\n",
904                        i, sample->callchain->ips[i]);
905 }
906
907 static void branch_stack__printf(struct perf_sample *sample)
908 {
909         uint64_t i;
910
911         printf("... branch stack: nr:%" PRIu64 "\n", sample->branch_stack->nr);
912
913         for (i = 0; i < sample->branch_stack->nr; i++)
914                 printf("..... %2"PRIu64": %016" PRIx64 " -> %016" PRIx64 "\n",
915                         i, sample->branch_stack->entries[i].from,
916                         sample->branch_stack->entries[i].to);
917 }
918
919 static void regs_dump__printf(u64 mask, u64 *regs)
920 {
921         unsigned rid, i = 0;
922
923         for_each_set_bit(rid, (unsigned long *) &mask, sizeof(mask) * 8) {
924                 u64 val = regs[i++];
925
926                 printf(".... %-5s 0x%" PRIx64 "\n",
927                        perf_reg_name(rid), val);
928         }
929 }
930
931 static void regs_user__printf(struct perf_sample *sample, u64 mask)
932 {
933         struct regs_dump *user_regs = &sample->user_regs;
934
935         if (user_regs->regs) {
936                 printf("... user regs: mask 0x%" PRIx64 "\n", mask);
937                 regs_dump__printf(mask, user_regs->regs);
938         }
939 }
940
941 static void stack_user__printf(struct stack_dump *dump)
942 {
943         printf("... ustack: size %" PRIu64 ", offset 0x%x\n",
944                dump->size, dump->offset);
945 }
946
947 static void perf_session__print_tstamp(struct perf_session *session,
948                                        union perf_event *event,
949                                        struct perf_sample *sample)
950 {
951         u64 sample_type = perf_evlist__sample_type(session->evlist);
952
953         if (event->header.type != PERF_RECORD_SAMPLE &&
954             !perf_evlist__sample_id_all(session->evlist)) {
955                 fputs("-1 -1 ", stdout);
956                 return;
957         }
958
959         if ((sample_type & PERF_SAMPLE_CPU))
960                 printf("%u ", sample->cpu);
961
962         if (sample_type & PERF_SAMPLE_TIME)
963                 printf("%" PRIu64 " ", sample->time);
964 }
965
966 static void dump_event(struct perf_session *session, union perf_event *event,
967                        u64 file_offset, struct perf_sample *sample)
968 {
969         if (!dump_trace)
970                 return;
971
972         printf("\n%#" PRIx64 " [%#x]: event: %d\n",
973                file_offset, event->header.size, event->header.type);
974
975         trace_event(event);
976
977         if (sample)
978                 perf_session__print_tstamp(session, event, sample);
979
980         printf("%#" PRIx64 " [%#x]: PERF_RECORD_%s", file_offset,
981                event->header.size, perf_event__name(event->header.type));
982 }
983
984 static void dump_sample(struct perf_evsel *evsel, union perf_event *event,
985                         struct perf_sample *sample)
986 {
987         u64 sample_type;
988
989         if (!dump_trace)
990                 return;
991
992         printf("(IP, %d): %d/%d: %#" PRIx64 " period: %" PRIu64 " addr: %#" PRIx64 "\n",
993                event->header.misc, sample->pid, sample->tid, sample->ip,
994                sample->period, sample->addr);
995
996         sample_type = evsel->attr.sample_type;
997
998         if (sample_type & PERF_SAMPLE_CALLCHAIN)
999                 callchain__printf(sample);
1000
1001         if (sample_type & PERF_SAMPLE_BRANCH_STACK)
1002                 branch_stack__printf(sample);
1003
1004         if (sample_type & PERF_SAMPLE_REGS_USER)
1005                 regs_user__printf(sample, evsel->attr.sample_regs_user);
1006
1007         if (sample_type & PERF_SAMPLE_STACK_USER)
1008                 stack_user__printf(&sample->user_stack);
1009 }
1010
1011 static struct machine *
1012         perf_session__find_machine_for_cpumode(struct perf_session *session,
1013                                                union perf_event *event)
1014 {
1015         const u8 cpumode = event->header.misc & PERF_RECORD_MISC_CPUMODE_MASK;
1016
1017         if (perf_guest &&
1018             ((cpumode == PERF_RECORD_MISC_GUEST_KERNEL) ||
1019              (cpumode == PERF_RECORD_MISC_GUEST_USER))) {
1020                 u32 pid;
1021
1022                 if (event->header.type == PERF_RECORD_MMAP)
1023                         pid = event->mmap.pid;
1024                 else
1025                         pid = event->ip.pid;
1026
1027                 return perf_session__findnew_machine(session, pid);
1028         }
1029
1030         return perf_session__find_host_machine(session);
1031 }
1032
1033 static int perf_session_deliver_event(struct perf_session *session,
1034                                       union perf_event *event,
1035                                       struct perf_sample *sample,
1036                                       struct perf_tool *tool,
1037                                       u64 file_offset)
1038 {
1039         struct perf_evsel *evsel;
1040         struct machine *machine;
1041
1042         dump_event(session, event, file_offset, sample);
1043
1044         evsel = perf_evlist__id2evsel(session->evlist, sample->id);
1045         if (evsel != NULL && event->header.type != PERF_RECORD_SAMPLE) {
1046                 /*
1047                  * XXX We're leaving PERF_RECORD_SAMPLE unnacounted here
1048                  * because the tools right now may apply filters, discarding
1049                  * some of the samples. For consistency, in the future we
1050                  * should have something like nr_filtered_samples and remove
1051                  * the sample->period from total_sample_period, etc, KISS for
1052                  * now tho.
1053                  *
1054                  * Also testing against NULL allows us to handle files without
1055                  * attr.sample_id_all and/or without PERF_SAMPLE_ID. In the
1056                  * future probably it'll be a good idea to restrict event
1057                  * processing via perf_session to files with both set.
1058                  */
1059                 hists__inc_nr_events(&evsel->hists, event->header.type);
1060         }
1061
1062         machine = perf_session__find_machine_for_cpumode(session, event);
1063
1064         switch (event->header.type) {
1065         case PERF_RECORD_SAMPLE:
1066                 dump_sample(evsel, event, sample);
1067                 if (evsel == NULL) {
1068                         ++session->hists.stats.nr_unknown_id;
1069                         return 0;
1070                 }
1071                 if (machine == NULL) {
1072                         ++session->hists.stats.nr_unprocessable_samples;
1073                         return 0;
1074                 }
1075                 return tool->sample(tool, event, sample, evsel, machine);
1076         case PERF_RECORD_MMAP:
1077                 return tool->mmap(tool, event, sample, machine);
1078         case PERF_RECORD_COMM:
1079                 return tool->comm(tool, event, sample, machine);
1080         case PERF_RECORD_FORK:
1081                 return tool->fork(tool, event, sample, machine);
1082         case PERF_RECORD_EXIT:
1083                 return tool->exit(tool, event, sample, machine);
1084         case PERF_RECORD_LOST:
1085                 if (tool->lost == perf_event__process_lost)
1086                         session->hists.stats.total_lost += event->lost.lost;
1087                 return tool->lost(tool, event, sample, machine);
1088         case PERF_RECORD_READ:
1089                 return tool->read(tool, event, sample, evsel, machine);
1090         case PERF_RECORD_THROTTLE:
1091                 return tool->throttle(tool, event, sample, machine);
1092         case PERF_RECORD_UNTHROTTLE:
1093                 return tool->unthrottle(tool, event, sample, machine);
1094         default:
1095                 ++session->hists.stats.nr_unknown_events;
1096                 return -1;
1097         }
1098 }
1099
1100 static int perf_session__preprocess_sample(struct perf_session *session,
1101                                            union perf_event *event, struct perf_sample *sample)
1102 {
1103         if (event->header.type != PERF_RECORD_SAMPLE ||
1104             !(perf_evlist__sample_type(session->evlist) & PERF_SAMPLE_CALLCHAIN))
1105                 return 0;
1106
1107         if (!ip_callchain__valid(sample->callchain, event)) {
1108                 pr_debug("call-chain problem with event, skipping it.\n");
1109                 ++session->hists.stats.nr_invalid_chains;
1110                 session->hists.stats.total_invalid_chains += sample->period;
1111                 return -EINVAL;
1112         }
1113         return 0;
1114 }
1115
1116 static int perf_session__process_user_event(struct perf_session *session, union perf_event *event,
1117                                             struct perf_tool *tool, u64 file_offset)
1118 {
1119         int err;
1120
1121         dump_event(session, event, file_offset, NULL);
1122
1123         /* These events are processed right away */
1124         switch (event->header.type) {
1125         case PERF_RECORD_HEADER_ATTR:
1126                 err = tool->attr(event, &session->evlist);
1127                 if (err == 0)
1128                         perf_session__set_id_hdr_size(session);
1129                 return err;
1130         case PERF_RECORD_HEADER_EVENT_TYPE:
1131                 return tool->event_type(tool, event);
1132         case PERF_RECORD_HEADER_TRACING_DATA:
1133                 /* setup for reading amidst mmap */
1134                 lseek(session->fd, file_offset, SEEK_SET);
1135                 return tool->tracing_data(event, session);
1136         case PERF_RECORD_HEADER_BUILD_ID:
1137                 return tool->build_id(tool, event, session);
1138         case PERF_RECORD_FINISHED_ROUND:
1139                 return tool->finished_round(tool, event, session);
1140         default:
1141                 return -EINVAL;
1142         }
1143 }
1144
1145 static void event_swap(union perf_event *event, bool sample_id_all)
1146 {
1147         perf_event__swap_op swap;
1148
1149         swap = perf_event__swap_ops[event->header.type];
1150         if (swap)
1151                 swap(event, sample_id_all);
1152 }
1153
1154 static int perf_session__process_event(struct perf_session *session,
1155                                        union perf_event *event,
1156                                        struct perf_tool *tool,
1157                                        u64 file_offset)
1158 {
1159         struct perf_sample sample;
1160         int ret;
1161
1162         if (session->header.needs_swap)
1163                 event_swap(event, perf_evlist__sample_id_all(session->evlist));
1164
1165         if (event->header.type >= PERF_RECORD_HEADER_MAX)
1166                 return -EINVAL;
1167
1168         hists__inc_nr_events(&session->hists, event->header.type);
1169
1170         if (event->header.type >= PERF_RECORD_USER_TYPE_START)
1171                 return perf_session__process_user_event(session, event, tool, file_offset);
1172
1173         /*
1174          * For all kernel events we get the sample data
1175          */
1176         ret = perf_evlist__parse_sample(session->evlist, event, &sample);
1177         if (ret)
1178                 return ret;
1179
1180         /* Preprocess sample records - precheck callchains */
1181         if (perf_session__preprocess_sample(session, event, &sample))
1182                 return 0;
1183
1184         if (tool->ordered_samples) {
1185                 ret = perf_session_queue_event(session, event, &sample,
1186                                                file_offset);
1187                 if (ret != -ETIME)
1188                         return ret;
1189         }
1190
1191         return perf_session_deliver_event(session, event, &sample, tool,
1192                                           file_offset);
1193 }
1194
1195 void perf_event_header__bswap(struct perf_event_header *self)
1196 {
1197         self->type = bswap_32(self->type);
1198         self->misc = bswap_16(self->misc);
1199         self->size = bswap_16(self->size);
1200 }
1201
1202 struct thread *perf_session__findnew(struct perf_session *session, pid_t pid)
1203 {
1204         return machine__findnew_thread(&session->host_machine, pid);
1205 }
1206
1207 static struct thread *perf_session__register_idle_thread(struct perf_session *self)
1208 {
1209         struct thread *thread = perf_session__findnew(self, 0);
1210
1211         if (thread == NULL || thread__set_comm(thread, "swapper")) {
1212                 pr_err("problem inserting idle task.\n");
1213                 thread = NULL;
1214         }
1215
1216         return thread;
1217 }
1218
1219 static void perf_session__warn_about_errors(const struct perf_session *session,
1220                                             const struct perf_tool *tool)
1221 {
1222         if (tool->lost == perf_event__process_lost &&
1223             session->hists.stats.nr_events[PERF_RECORD_LOST] != 0) {
1224                 ui__warning("Processed %d events and lost %d chunks!\n\n"
1225                             "Check IO/CPU overload!\n\n",
1226                             session->hists.stats.nr_events[0],
1227                             session->hists.stats.nr_events[PERF_RECORD_LOST]);
1228         }
1229
1230         if (session->hists.stats.nr_unknown_events != 0) {
1231                 ui__warning("Found %u unknown events!\n\n"
1232                             "Is this an older tool processing a perf.data "
1233                             "file generated by a more recent tool?\n\n"
1234                             "If that is not the case, consider "
1235                             "reporting to linux-kernel@vger.kernel.org.\n\n",
1236                             session->hists.stats.nr_unknown_events);
1237         }
1238
1239         if (session->hists.stats.nr_unknown_id != 0) {
1240                 ui__warning("%u samples with id not present in the header\n",
1241                             session->hists.stats.nr_unknown_id);
1242         }
1243
1244         if (session->hists.stats.nr_invalid_chains != 0) {
1245                 ui__warning("Found invalid callchains!\n\n"
1246                             "%u out of %u events were discarded for this reason.\n\n"
1247                             "Consider reporting to linux-kernel@vger.kernel.org.\n\n",
1248                             session->hists.stats.nr_invalid_chains,
1249                             session->hists.stats.nr_events[PERF_RECORD_SAMPLE]);
1250         }
1251
1252         if (session->hists.stats.nr_unprocessable_samples != 0) {
1253                 ui__warning("%u unprocessable samples recorded.\n"
1254                             "Do you have a KVM guest running and not using 'perf kvm'?\n",
1255                             session->hists.stats.nr_unprocessable_samples);
1256         }
1257 }
1258
1259 #define session_done()  (*(volatile int *)(&session_done))
1260 volatile int session_done;
1261
1262 static int __perf_session__process_pipe_events(struct perf_session *self,
1263                                                struct perf_tool *tool)
1264 {
1265         union perf_event *event;
1266         uint32_t size, cur_size = 0;
1267         void *buf = NULL;
1268         int skip = 0;
1269         u64 head;
1270         int err;
1271         void *p;
1272
1273         perf_tool__fill_defaults(tool);
1274
1275         head = 0;
1276         cur_size = sizeof(union perf_event);
1277
1278         buf = malloc(cur_size);
1279         if (!buf)
1280                 return -errno;
1281 more:
1282         event = buf;
1283         err = readn(self->fd, event, sizeof(struct perf_event_header));
1284         if (err <= 0) {
1285                 if (err == 0)
1286                         goto done;
1287
1288                 pr_err("failed to read event header\n");
1289                 goto out_err;
1290         }
1291
1292         if (self->header.needs_swap)
1293                 perf_event_header__bswap(&event->header);
1294
1295         size = event->header.size;
1296         if (size == 0)
1297                 size = 8;
1298
1299         if (size > cur_size) {
1300                 void *new = realloc(buf, size);
1301                 if (!new) {
1302                         pr_err("failed to allocate memory to read event\n");
1303                         goto out_err;
1304                 }
1305                 buf = new;
1306                 cur_size = size;
1307                 event = buf;
1308         }
1309         p = event;
1310         p += sizeof(struct perf_event_header);
1311
1312         if (size - sizeof(struct perf_event_header)) {
1313                 err = readn(self->fd, p, size - sizeof(struct perf_event_header));
1314                 if (err <= 0) {
1315                         if (err == 0) {
1316                                 pr_err("unexpected end of event stream\n");
1317                                 goto done;
1318                         }
1319
1320                         pr_err("failed to read event data\n");
1321                         goto out_err;
1322                 }
1323         }
1324
1325         if ((skip = perf_session__process_event(self, event, tool, head)) < 0) {
1326                 pr_err("%#" PRIx64 " [%#x]: failed to process type: %d\n",
1327                        head, event->header.size, event->header.type);
1328                 err = -EINVAL;
1329                 goto out_err;
1330         }
1331
1332         head += size;
1333
1334         if (skip > 0)
1335                 head += skip;
1336
1337         if (!session_done())
1338                 goto more;
1339 done:
1340         err = 0;
1341 out_err:
1342         free(buf);
1343         perf_session__warn_about_errors(self, tool);
1344         perf_session_free_sample_buffers(self);
1345         return err;
1346 }
1347
1348 static union perf_event *
1349 fetch_mmaped_event(struct perf_session *session,
1350                    u64 head, size_t mmap_size, char *buf)
1351 {
1352         union perf_event *event;
1353
1354         /*
1355          * Ensure we have enough space remaining to read
1356          * the size of the event in the headers.
1357          */
1358         if (head + sizeof(event->header) > mmap_size)
1359                 return NULL;
1360
1361         event = (union perf_event *)(buf + head);
1362
1363         if (session->header.needs_swap)
1364                 perf_event_header__bswap(&event->header);
1365
1366         if (head + event->header.size > mmap_size)
1367                 return NULL;
1368
1369         return event;
1370 }
1371
1372 int __perf_session__process_events(struct perf_session *session,
1373                                    u64 data_offset, u64 data_size,
1374                                    u64 file_size, struct perf_tool *tool)
1375 {
1376         u64 head, page_offset, file_offset, file_pos, progress_next;
1377         int err, mmap_prot, mmap_flags, map_idx = 0;
1378         size_t  mmap_size;
1379         char *buf, *mmaps[8];
1380         union perf_event *event;
1381         uint32_t size;
1382
1383         perf_tool__fill_defaults(tool);
1384
1385         page_offset = page_size * (data_offset / page_size);
1386         file_offset = page_offset;
1387         head = data_offset - page_offset;
1388
1389         if (data_offset + data_size < file_size)
1390                 file_size = data_offset + data_size;
1391
1392         progress_next = file_size / 16;
1393
1394         mmap_size = session->mmap_window;
1395         if (mmap_size > file_size)
1396                 mmap_size = file_size;
1397
1398         memset(mmaps, 0, sizeof(mmaps));
1399
1400         mmap_prot  = PROT_READ;
1401         mmap_flags = MAP_SHARED;
1402
1403         if (session->header.needs_swap) {
1404                 mmap_prot  |= PROT_WRITE;
1405                 mmap_flags = MAP_PRIVATE;
1406         }
1407 remap:
1408         buf = mmap(NULL, mmap_size, mmap_prot, mmap_flags, session->fd,
1409                    file_offset);
1410         if (buf == MAP_FAILED) {
1411                 pr_err("failed to mmap file\n");
1412                 err = -errno;
1413                 goto out_err;
1414         }
1415         mmaps[map_idx] = buf;
1416         map_idx = (map_idx + 1) & (ARRAY_SIZE(mmaps) - 1);
1417         file_pos = file_offset + head;
1418
1419 more:
1420         event = fetch_mmaped_event(session, head, mmap_size, buf);
1421         if (!event) {
1422                 if (mmaps[map_idx]) {
1423                         munmap(mmaps[map_idx], mmap_size);
1424                         mmaps[map_idx] = NULL;
1425                 }
1426
1427                 page_offset = page_size * (head / page_size);
1428                 file_offset += page_offset;
1429                 head -= page_offset;
1430                 goto remap;
1431         }
1432
1433         size = event->header.size;
1434
1435         if (size == 0 ||
1436             perf_session__process_event(session, event, tool, file_pos) < 0) {
1437                 pr_err("%#" PRIx64 " [%#x]: failed to process type: %d\n",
1438                        file_offset + head, event->header.size,
1439                        event->header.type);
1440                 err = -EINVAL;
1441                 goto out_err;
1442         }
1443
1444         head += size;
1445         file_pos += size;
1446
1447         if (file_pos >= progress_next) {
1448                 progress_next += file_size / 16;
1449                 ui_progress__update(file_pos, file_size,
1450                                     "Processing events...");
1451         }
1452
1453         if (file_pos < file_size)
1454                 goto more;
1455
1456         err = 0;
1457         /* do the final flush for ordered samples */
1458         session->ordered_samples.next_flush = ULLONG_MAX;
1459         err = flush_sample_queue(session, tool);
1460 out_err:
1461         ui_progress__finish();
1462         perf_session__warn_about_errors(session, tool);
1463         perf_session_free_sample_buffers(session);
1464         return err;
1465 }
1466
1467 int perf_session__process_events(struct perf_session *self,
1468                                  struct perf_tool *tool)
1469 {
1470         int err;
1471
1472         if (perf_session__register_idle_thread(self) == NULL)
1473                 return -ENOMEM;
1474
1475         if (!self->fd_pipe)
1476                 err = __perf_session__process_events(self,
1477                                                      self->header.data_offset,
1478                                                      self->header.data_size,
1479                                                      self->size, tool);
1480         else
1481                 err = __perf_session__process_pipe_events(self, tool);
1482
1483         return err;
1484 }
1485
1486 bool perf_session__has_traces(struct perf_session *session, const char *msg)
1487 {
1488         if (!(perf_evlist__sample_type(session->evlist) & PERF_SAMPLE_RAW)) {
1489                 pr_err("No trace sample to read. Did you call 'perf %s'?\n", msg);
1490                 return false;
1491         }
1492
1493         return true;
1494 }
1495
1496 int maps__set_kallsyms_ref_reloc_sym(struct map **maps,
1497                                      const char *symbol_name, u64 addr)
1498 {
1499         char *bracket;
1500         enum map_type i;
1501         struct ref_reloc_sym *ref;
1502
1503         ref = zalloc(sizeof(struct ref_reloc_sym));
1504         if (ref == NULL)
1505                 return -ENOMEM;
1506
1507         ref->name = strdup(symbol_name);
1508         if (ref->name == NULL) {
1509                 free(ref);
1510                 return -ENOMEM;
1511         }
1512
1513         bracket = strchr(ref->name, ']');
1514         if (bracket)
1515                 *bracket = '\0';
1516
1517         ref->addr = addr;
1518
1519         for (i = 0; i < MAP__NR_TYPES; ++i) {
1520                 struct kmap *kmap = map__kmap(maps[i]);
1521                 kmap->ref_reloc_sym = ref;
1522         }
1523
1524         return 0;
1525 }
1526
1527 size_t perf_session__fprintf_dsos(struct perf_session *self, FILE *fp)
1528 {
1529         return __dsos__fprintf(&self->host_machine.kernel_dsos, fp) +
1530                __dsos__fprintf(&self->host_machine.user_dsos, fp) +
1531                machines__fprintf_dsos(&self->machines, fp);
1532 }
1533
1534 size_t perf_session__fprintf_dsos_buildid(struct perf_session *self, FILE *fp,
1535                                           bool with_hits)
1536 {
1537         size_t ret = machine__fprintf_dsos_buildid(&self->host_machine, fp, with_hits);
1538         return ret + machines__fprintf_dsos_buildid(&self->machines, fp, with_hits);
1539 }
1540
1541 size_t perf_session__fprintf_nr_events(struct perf_session *session, FILE *fp)
1542 {
1543         struct perf_evsel *pos;
1544         size_t ret = fprintf(fp, "Aggregated stats:\n");
1545
1546         ret += hists__fprintf_nr_events(&session->hists, fp);
1547
1548         list_for_each_entry(pos, &session->evlist->entries, node) {
1549                 ret += fprintf(fp, "%s stats:\n", perf_evsel__name(pos));
1550                 ret += hists__fprintf_nr_events(&pos->hists, fp);
1551         }
1552
1553         return ret;
1554 }
1555
1556 size_t perf_session__fprintf(struct perf_session *session, FILE *fp)
1557 {
1558         /*
1559          * FIXME: Here we have to actually print all the machines in this
1560          * session, not just the host...
1561          */
1562         return machine__fprintf(&session->host_machine, fp);
1563 }
1564
1565 void perf_session__remove_thread(struct perf_session *session,
1566                                  struct thread *th)
1567 {
1568         /*
1569          * FIXME: This one makes no sense, we need to remove the thread from
1570          * the machine it belongs to, perf_session can have many machines, so
1571          * doing it always on ->host_machine is wrong.  Fix when auditing all
1572          * the 'perf kvm' code.
1573          */
1574         machine__remove_thread(&session->host_machine, th);
1575 }
1576
1577 struct perf_evsel *perf_session__find_first_evtype(struct perf_session *session,
1578                                               unsigned int type)
1579 {
1580         struct perf_evsel *pos;
1581
1582         list_for_each_entry(pos, &session->evlist->entries, node) {
1583                 if (pos->attr.type == type)
1584                         return pos;
1585         }
1586         return NULL;
1587 }
1588
1589 void perf_evsel__print_ip(struct perf_evsel *evsel, union perf_event *event,
1590                           struct perf_sample *sample, struct machine *machine,
1591                           int print_sym, int print_dso, int print_symoffset)
1592 {
1593         struct addr_location al;
1594         struct callchain_cursor_node *node;
1595
1596         if (perf_event__preprocess_sample(event, machine, &al, sample,
1597                                           NULL) < 0) {
1598                 error("problem processing %d event, skipping it.\n",
1599                         event->header.type);
1600                 return;
1601         }
1602
1603         if (symbol_conf.use_callchain && sample->callchain) {
1604
1605
1606                 if (machine__resolve_callchain(machine, evsel, al.thread,
1607                                                sample, NULL) != 0) {
1608                         if (verbose)
1609                                 error("Failed to resolve callchain. Skipping\n");
1610                         return;
1611                 }
1612                 callchain_cursor_commit(&callchain_cursor);
1613
1614                 while (1) {
1615                         node = callchain_cursor_current(&callchain_cursor);
1616                         if (!node)
1617                                 break;
1618
1619                         printf("\t%16" PRIx64, node->ip);
1620                         if (print_sym) {
1621                                 printf(" ");
1622                                 symbol__fprintf_symname(node->sym, stdout);
1623                         }
1624                         if (print_dso) {
1625                                 printf(" (");
1626                                 map__fprintf_dsoname(node->map, stdout);
1627                                 printf(")");
1628                         }
1629                         printf("\n");
1630
1631                         callchain_cursor_advance(&callchain_cursor);
1632                 }
1633
1634         } else {
1635                 printf("%16" PRIx64, sample->ip);
1636                 if (print_sym) {
1637                         printf(" ");
1638                         if (print_symoffset)
1639                                 symbol__fprintf_symname_offs(al.sym, &al,
1640                                                              stdout);
1641                         else
1642                                 symbol__fprintf_symname(al.sym, stdout);
1643                 }
1644
1645                 if (print_dso) {
1646                         printf(" (");
1647                         map__fprintf_dsoname(al.map, stdout);
1648                         printf(")");
1649                 }
1650         }
1651 }
1652
1653 int perf_session__cpu_bitmap(struct perf_session *session,
1654                              const char *cpu_list, unsigned long *cpu_bitmap)
1655 {
1656         int i;
1657         struct cpu_map *map;
1658
1659         for (i = 0; i < PERF_TYPE_MAX; ++i) {
1660                 struct perf_evsel *evsel;
1661
1662                 evsel = perf_session__find_first_evtype(session, i);
1663                 if (!evsel)
1664                         continue;
1665
1666                 if (!(evsel->attr.sample_type & PERF_SAMPLE_CPU)) {
1667                         pr_err("File does not contain CPU events. "
1668                                "Remove -c option to proceed.\n");
1669                         return -1;
1670                 }
1671         }
1672
1673         map = cpu_map__new(cpu_list);
1674         if (map == NULL) {
1675                 pr_err("Invalid cpu_list\n");
1676                 return -1;
1677         }
1678
1679         for (i = 0; i < map->nr; i++) {
1680                 int cpu = map->map[i];
1681
1682                 if (cpu >= MAX_NR_CPUS) {
1683                         pr_err("Requested CPU %d too large. "
1684                                "Consider raising MAX_NR_CPUS\n", cpu);
1685                         return -1;
1686                 }
1687
1688                 set_bit(cpu, cpu_bitmap);
1689         }
1690
1691         return 0;
1692 }
1693
1694 void perf_session__fprintf_info(struct perf_session *session, FILE *fp,
1695                                 bool full)
1696 {
1697         struct stat st;
1698         int ret;
1699
1700         if (session == NULL || fp == NULL)
1701                 return;
1702
1703         ret = fstat(session->fd, &st);
1704         if (ret == -1)
1705                 return;
1706
1707         fprintf(fp, "# ========\n");
1708         fprintf(fp, "# captured on: %s", ctime(&st.st_ctime));
1709         perf_header__fprintf_info(session, fp, full);
1710         fprintf(fp, "# ========\n#\n");
1711 }
1712
1713
1714 int __perf_session__set_tracepoints_handlers(struct perf_session *session,
1715                                              const struct perf_evsel_str_handler *assocs,
1716                                              size_t nr_assocs)
1717 {
1718         struct perf_evlist *evlist = session->evlist;
1719         struct event_format *format;
1720         struct perf_evsel *evsel;
1721         char *tracepoint, *name;
1722         size_t i;
1723         int err;
1724
1725         for (i = 0; i < nr_assocs; i++) {
1726                 err = -ENOMEM;
1727                 tracepoint = strdup(assocs[i].name);
1728                 if (tracepoint == NULL)
1729                         goto out;
1730
1731                 err = -ENOENT;
1732                 name = strchr(tracepoint, ':');
1733                 if (name == NULL)
1734                         goto out_free;
1735
1736                 *name++ = '\0';
1737                 format = pevent_find_event_by_name(session->pevent,
1738                                                    tracepoint, name);
1739                 if (format == NULL) {
1740                         /*
1741                          * Adding a handler for an event not in the session,
1742                          * just ignore it.
1743                          */
1744                         goto next;
1745                 }
1746
1747                 evsel = perf_evlist__find_tracepoint_by_id(evlist, format->id);
1748                 if (evsel == NULL)
1749                         goto next;
1750
1751                 err = -EEXIST;
1752                 if (evsel->handler.func != NULL)
1753                         goto out_free;
1754                 evsel->handler.func = assocs[i].handler;
1755 next:
1756                 free(tracepoint);
1757         }
1758
1759         err = 0;
1760 out:
1761         return err;
1762
1763 out_free:
1764         free(tracepoint);
1765         goto out;
1766 }