GNU Linux-libre 4.19.211-gnu1
[releases.git] / tools / perf / util / event.c
1 // SPDX-License-Identifier: GPL-2.0
2 #include <dirent.h>
3 #include <errno.h>
4 #include <fcntl.h>
5 #include <inttypes.h>
6 #include <linux/kernel.h>
7 #include <linux/types.h>
8 #include <sys/types.h>
9 #include <sys/stat.h>
10 #include <unistd.h>
11 #include <uapi/linux/mman.h> /* To get things like MAP_HUGETLB even on older libc headers */
12 #include <api/fs/fs.h>
13 #include <linux/perf_event.h>
14 #include "event.h"
15 #include "debug.h"
16 #include "hist.h"
17 #include "machine.h"
18 #include "sort.h"
19 #include "string2.h"
20 #include "strlist.h"
21 #include "thread.h"
22 #include "thread_map.h"
23 #include "sane_ctype.h"
24 #include "symbol/kallsyms.h"
25 #include "asm/bug.h"
26 #include "stat.h"
27
28 static const char *perf_event__names[] = {
29         [0]                                     = "TOTAL",
30         [PERF_RECORD_MMAP]                      = "MMAP",
31         [PERF_RECORD_MMAP2]                     = "MMAP2",
32         [PERF_RECORD_LOST]                      = "LOST",
33         [PERF_RECORD_COMM]                      = "COMM",
34         [PERF_RECORD_EXIT]                      = "EXIT",
35         [PERF_RECORD_THROTTLE]                  = "THROTTLE",
36         [PERF_RECORD_UNTHROTTLE]                = "UNTHROTTLE",
37         [PERF_RECORD_FORK]                      = "FORK",
38         [PERF_RECORD_READ]                      = "READ",
39         [PERF_RECORD_SAMPLE]                    = "SAMPLE",
40         [PERF_RECORD_AUX]                       = "AUX",
41         [PERF_RECORD_ITRACE_START]              = "ITRACE_START",
42         [PERF_RECORD_LOST_SAMPLES]              = "LOST_SAMPLES",
43         [PERF_RECORD_SWITCH]                    = "SWITCH",
44         [PERF_RECORD_SWITCH_CPU_WIDE]           = "SWITCH_CPU_WIDE",
45         [PERF_RECORD_NAMESPACES]                = "NAMESPACES",
46         [PERF_RECORD_HEADER_ATTR]               = "ATTR",
47         [PERF_RECORD_HEADER_EVENT_TYPE]         = "EVENT_TYPE",
48         [PERF_RECORD_HEADER_TRACING_DATA]       = "TRACING_DATA",
49         [PERF_RECORD_HEADER_BUILD_ID]           = "BUILD_ID",
50         [PERF_RECORD_FINISHED_ROUND]            = "FINISHED_ROUND",
51         [PERF_RECORD_ID_INDEX]                  = "ID_INDEX",
52         [PERF_RECORD_AUXTRACE_INFO]             = "AUXTRACE_INFO",
53         [PERF_RECORD_AUXTRACE]                  = "AUXTRACE",
54         [PERF_RECORD_AUXTRACE_ERROR]            = "AUXTRACE_ERROR",
55         [PERF_RECORD_THREAD_MAP]                = "THREAD_MAP",
56         [PERF_RECORD_CPU_MAP]                   = "CPU_MAP",
57         [PERF_RECORD_STAT_CONFIG]               = "STAT_CONFIG",
58         [PERF_RECORD_STAT]                      = "STAT",
59         [PERF_RECORD_STAT_ROUND]                = "STAT_ROUND",
60         [PERF_RECORD_EVENT_UPDATE]              = "EVENT_UPDATE",
61         [PERF_RECORD_TIME_CONV]                 = "TIME_CONV",
62         [PERF_RECORD_HEADER_FEATURE]            = "FEATURE",
63 };
64
65 static const char *perf_ns__names[] = {
66         [NET_NS_INDEX]          = "net",
67         [UTS_NS_INDEX]          = "uts",
68         [IPC_NS_INDEX]          = "ipc",
69         [PID_NS_INDEX]          = "pid",
70         [USER_NS_INDEX]         = "user",
71         [MNT_NS_INDEX]          = "mnt",
72         [CGROUP_NS_INDEX]       = "cgroup",
73 };
74
75 const char *perf_event__name(unsigned int id)
76 {
77         if (id >= ARRAY_SIZE(perf_event__names))
78                 return "INVALID";
79         if (!perf_event__names[id])
80                 return "UNKNOWN";
81         return perf_event__names[id];
82 }
83
84 static const char *perf_ns__name(unsigned int id)
85 {
86         if (id >= ARRAY_SIZE(perf_ns__names))
87                 return "UNKNOWN";
88         return perf_ns__names[id];
89 }
90
91 int perf_tool__process_synth_event(struct perf_tool *tool,
92                                    union perf_event *event,
93                                    struct machine *machine,
94                                    perf_event__handler_t process)
95 {
96         struct perf_sample synth_sample = {
97         .pid       = -1,
98         .tid       = -1,
99         .time      = -1,
100         .stream_id = -1,
101         .cpu       = -1,
102         .period    = 1,
103         .cpumode   = event->header.misc & PERF_RECORD_MISC_CPUMODE_MASK,
104         };
105
106         return process(tool, event, &synth_sample, machine);
107 };
108
109 /*
110  * Assumes that the first 4095 bytes of /proc/pid/stat contains
111  * the comm, tgid and ppid.
112  */
113 static int perf_event__get_comm_ids(pid_t pid, char *comm, size_t len,
114                                     pid_t *tgid, pid_t *ppid)
115 {
116         char filename[PATH_MAX];
117         char bf[4096];
118         int fd;
119         size_t size = 0;
120         ssize_t n;
121         char *name, *tgids, *ppids;
122
123         *tgid = -1;
124         *ppid = -1;
125
126         snprintf(filename, sizeof(filename), "/proc/%d/status", pid);
127
128         fd = open(filename, O_RDONLY);
129         if (fd < 0) {
130                 pr_debug("couldn't open %s\n", filename);
131                 return -1;
132         }
133
134         n = read(fd, bf, sizeof(bf) - 1);
135         close(fd);
136         if (n <= 0) {
137                 pr_warning("Couldn't get COMM, tigd and ppid for pid %d\n",
138                            pid);
139                 return -1;
140         }
141         bf[n] = '\0';
142
143         name = strstr(bf, "Name:");
144         tgids = strstr(bf, "Tgid:");
145         ppids = strstr(bf, "PPid:");
146
147         if (name) {
148                 char *nl;
149
150                 name += 5;  /* strlen("Name:") */
151                 name = ltrim(name);
152
153                 nl = strchr(name, '\n');
154                 if (nl)
155                         *nl = '\0';
156
157                 size = strlen(name);
158                 if (size >= len)
159                         size = len - 1;
160                 memcpy(comm, name, size);
161                 comm[size] = '\0';
162         } else {
163                 pr_debug("Name: string not found for pid %d\n", pid);
164         }
165
166         if (tgids) {
167                 tgids += 5;  /* strlen("Tgid:") */
168                 *tgid = atoi(tgids);
169         } else {
170                 pr_debug("Tgid: string not found for pid %d\n", pid);
171         }
172
173         if (ppids) {
174                 ppids += 5;  /* strlen("PPid:") */
175                 *ppid = atoi(ppids);
176         } else {
177                 pr_debug("PPid: string not found for pid %d\n", pid);
178         }
179
180         return 0;
181 }
182
183 static int perf_event__prepare_comm(union perf_event *event, pid_t pid,
184                                     struct machine *machine,
185                                     pid_t *tgid, pid_t *ppid)
186 {
187         size_t size;
188
189         *ppid = -1;
190
191         memset(&event->comm, 0, sizeof(event->comm));
192
193         if (machine__is_host(machine)) {
194                 if (perf_event__get_comm_ids(pid, event->comm.comm,
195                                              sizeof(event->comm.comm),
196                                              tgid, ppid) != 0) {
197                         return -1;
198                 }
199         } else {
200                 *tgid = machine->pid;
201         }
202
203         if (*tgid < 0)
204                 return -1;
205
206         event->comm.pid = *tgid;
207         event->comm.header.type = PERF_RECORD_COMM;
208
209         size = strlen(event->comm.comm) + 1;
210         size = PERF_ALIGN(size, sizeof(u64));
211         memset(event->comm.comm + size, 0, machine->id_hdr_size);
212         event->comm.header.size = (sizeof(event->comm) -
213                                 (sizeof(event->comm.comm) - size) +
214                                 machine->id_hdr_size);
215         event->comm.tid = pid;
216
217         return 0;
218 }
219
220 pid_t perf_event__synthesize_comm(struct perf_tool *tool,
221                                          union perf_event *event, pid_t pid,
222                                          perf_event__handler_t process,
223                                          struct machine *machine)
224 {
225         pid_t tgid, ppid;
226
227         if (perf_event__prepare_comm(event, pid, machine, &tgid, &ppid) != 0)
228                 return -1;
229
230         if (perf_tool__process_synth_event(tool, event, machine, process) != 0)
231                 return -1;
232
233         return tgid;
234 }
235
236 static void perf_event__get_ns_link_info(pid_t pid, const char *ns,
237                                          struct perf_ns_link_info *ns_link_info)
238 {
239         struct stat64 st;
240         char proc_ns[128];
241
242         sprintf(proc_ns, "/proc/%u/ns/%s", pid, ns);
243         if (stat64(proc_ns, &st) == 0) {
244                 ns_link_info->dev = st.st_dev;
245                 ns_link_info->ino = st.st_ino;
246         }
247 }
248
249 int perf_event__synthesize_namespaces(struct perf_tool *tool,
250                                       union perf_event *event,
251                                       pid_t pid, pid_t tgid,
252                                       perf_event__handler_t process,
253                                       struct machine *machine)
254 {
255         u32 idx;
256         struct perf_ns_link_info *ns_link_info;
257
258         if (!tool || !tool->namespace_events)
259                 return 0;
260
261         memset(&event->namespaces, 0, (sizeof(event->namespaces) +
262                (NR_NAMESPACES * sizeof(struct perf_ns_link_info)) +
263                machine->id_hdr_size));
264
265         event->namespaces.pid = tgid;
266         event->namespaces.tid = pid;
267
268         event->namespaces.nr_namespaces = NR_NAMESPACES;
269
270         ns_link_info = event->namespaces.link_info;
271
272         for (idx = 0; idx < event->namespaces.nr_namespaces; idx++)
273                 perf_event__get_ns_link_info(pid, perf_ns__name(idx),
274                                              &ns_link_info[idx]);
275
276         event->namespaces.header.type = PERF_RECORD_NAMESPACES;
277
278         event->namespaces.header.size = (sizeof(event->namespaces) +
279                         (NR_NAMESPACES * sizeof(struct perf_ns_link_info)) +
280                         machine->id_hdr_size);
281
282         if (perf_tool__process_synth_event(tool, event, machine, process) != 0)
283                 return -1;
284
285         return 0;
286 }
287
288 static int perf_event__synthesize_fork(struct perf_tool *tool,
289                                        union perf_event *event,
290                                        pid_t pid, pid_t tgid, pid_t ppid,
291                                        perf_event__handler_t process,
292                                        struct machine *machine)
293 {
294         memset(&event->fork, 0, sizeof(event->fork) + machine->id_hdr_size);
295
296         /*
297          * for main thread set parent to ppid from status file. For other
298          * threads set parent pid to main thread. ie., assume main thread
299          * spawns all threads in a process
300         */
301         if (tgid == pid) {
302                 event->fork.ppid = ppid;
303                 event->fork.ptid = ppid;
304         } else {
305                 event->fork.ppid = tgid;
306                 event->fork.ptid = tgid;
307         }
308         event->fork.pid  = tgid;
309         event->fork.tid  = pid;
310         event->fork.header.type = PERF_RECORD_FORK;
311
312         event->fork.header.size = (sizeof(event->fork) + machine->id_hdr_size);
313
314         if (perf_tool__process_synth_event(tool, event, machine, process) != 0)
315                 return -1;
316
317         return 0;
318 }
319
320 int perf_event__synthesize_mmap_events(struct perf_tool *tool,
321                                        union perf_event *event,
322                                        pid_t pid, pid_t tgid,
323                                        perf_event__handler_t process,
324                                        struct machine *machine,
325                                        bool mmap_data,
326                                        unsigned int proc_map_timeout)
327 {
328         char filename[PATH_MAX];
329         FILE *fp;
330         unsigned long long t;
331         bool truncation = false;
332         unsigned long long timeout = proc_map_timeout * 1000000ULL;
333         int rc = 0;
334         const char *hugetlbfs_mnt = hugetlbfs__mountpoint();
335         int hugetlbfs_mnt_len = hugetlbfs_mnt ? strlen(hugetlbfs_mnt) : 0;
336
337         if (machine__is_default_guest(machine))
338                 return 0;
339
340         snprintf(filename, sizeof(filename), "%s/proc/%d/task/%d/maps",
341                  machine->root_dir, pid, pid);
342
343         fp = fopen(filename, "r");
344         if (fp == NULL) {
345                 /*
346                  * We raced with a task exiting - just return:
347                  */
348                 pr_debug("couldn't open %s\n", filename);
349                 return -1;
350         }
351
352         event->header.type = PERF_RECORD_MMAP2;
353         t = rdclock();
354
355         while (1) {
356                 char bf[BUFSIZ];
357                 char prot[5];
358                 char execname[PATH_MAX];
359                 char anonstr[] = "//anon";
360                 unsigned int ino;
361                 size_t size;
362                 ssize_t n;
363
364                 if (fgets(bf, sizeof(bf), fp) == NULL)
365                         break;
366
367                 if ((rdclock() - t) > timeout) {
368                         pr_warning("Reading %s time out. "
369                                    "You may want to increase "
370                                    "the time limit by --proc-map-timeout\n",
371                                    filename);
372                         truncation = true;
373                         goto out;
374                 }
375
376                 /* ensure null termination since stack will be reused. */
377                 strcpy(execname, "");
378
379                 /* 00400000-0040c000 r-xp 00000000 fd:01 41038  /bin/cat */
380                 n = sscanf(bf, "%"PRIx64"-%"PRIx64" %s %"PRIx64" %x:%x %u %[^\n]\n",
381                        &event->mmap2.start, &event->mmap2.len, prot,
382                        &event->mmap2.pgoff, &event->mmap2.maj,
383                        &event->mmap2.min,
384                        &ino, execname);
385
386                 /*
387                  * Anon maps don't have the execname.
388                  */
389                 if (n < 7)
390                         continue;
391
392                 event->mmap2.ino = (u64)ino;
393
394                 /*
395                  * Just like the kernel, see __perf_event_mmap in kernel/perf_event.c
396                  */
397                 if (machine__is_host(machine))
398                         event->header.misc = PERF_RECORD_MISC_USER;
399                 else
400                         event->header.misc = PERF_RECORD_MISC_GUEST_USER;
401
402                 /* map protection and flags bits */
403                 event->mmap2.prot = 0;
404                 event->mmap2.flags = 0;
405                 if (prot[0] == 'r')
406                         event->mmap2.prot |= PROT_READ;
407                 if (prot[1] == 'w')
408                         event->mmap2.prot |= PROT_WRITE;
409                 if (prot[2] == 'x')
410                         event->mmap2.prot |= PROT_EXEC;
411
412                 if (prot[3] == 's')
413                         event->mmap2.flags |= MAP_SHARED;
414                 else
415                         event->mmap2.flags |= MAP_PRIVATE;
416
417                 if (prot[2] != 'x') {
418                         if (!mmap_data || prot[0] != 'r')
419                                 continue;
420
421                         event->header.misc |= PERF_RECORD_MISC_MMAP_DATA;
422                 }
423
424 out:
425                 if (truncation)
426                         event->header.misc |= PERF_RECORD_MISC_PROC_MAP_PARSE_TIMEOUT;
427
428                 if (!strcmp(execname, ""))
429                         strcpy(execname, anonstr);
430
431                 if (hugetlbfs_mnt_len &&
432                     !strncmp(execname, hugetlbfs_mnt, hugetlbfs_mnt_len)) {
433                         strcpy(execname, anonstr);
434                         event->mmap2.flags |= MAP_HUGETLB;
435                 }
436
437                 size = strlen(execname) + 1;
438                 memcpy(event->mmap2.filename, execname, size);
439                 size = PERF_ALIGN(size, sizeof(u64));
440                 event->mmap2.len -= event->mmap.start;
441                 event->mmap2.header.size = (sizeof(event->mmap2) -
442                                         (sizeof(event->mmap2.filename) - size));
443                 memset(event->mmap2.filename + size, 0, machine->id_hdr_size);
444                 event->mmap2.header.size += machine->id_hdr_size;
445                 event->mmap2.pid = tgid;
446                 event->mmap2.tid = pid;
447
448                 if (perf_tool__process_synth_event(tool, event, machine, process) != 0) {
449                         rc = -1;
450                         break;
451                 }
452
453                 if (truncation)
454                         break;
455         }
456
457         fclose(fp);
458         return rc;
459 }
460
461 int perf_event__synthesize_modules(struct perf_tool *tool,
462                                    perf_event__handler_t process,
463                                    struct machine *machine)
464 {
465         int rc = 0;
466         struct map *pos;
467         struct maps *maps = machine__kernel_maps(machine);
468         union perf_event *event = zalloc((sizeof(event->mmap) +
469                                           machine->id_hdr_size));
470         if (event == NULL) {
471                 pr_debug("Not enough memory synthesizing mmap event "
472                          "for kernel modules\n");
473                 return -1;
474         }
475
476         event->header.type = PERF_RECORD_MMAP;
477
478         /*
479          * kernel uses 0 for user space maps, see kernel/perf_event.c
480          * __perf_event_mmap
481          */
482         if (machine__is_host(machine))
483                 event->header.misc = PERF_RECORD_MISC_KERNEL;
484         else
485                 event->header.misc = PERF_RECORD_MISC_GUEST_KERNEL;
486
487         for (pos = maps__first(maps); pos; pos = map__next(pos)) {
488                 size_t size;
489
490                 if (!__map__is_kmodule(pos))
491                         continue;
492
493                 size = PERF_ALIGN(pos->dso->long_name_len + 1, sizeof(u64));
494                 event->mmap.header.type = PERF_RECORD_MMAP;
495                 event->mmap.header.size = (sizeof(event->mmap) -
496                                         (sizeof(event->mmap.filename) - size));
497                 memset(event->mmap.filename + size, 0, machine->id_hdr_size);
498                 event->mmap.header.size += machine->id_hdr_size;
499                 event->mmap.start = pos->start;
500                 event->mmap.len   = pos->end - pos->start;
501                 event->mmap.pid   = machine->pid;
502
503                 memcpy(event->mmap.filename, pos->dso->long_name,
504                        pos->dso->long_name_len + 1);
505                 if (perf_tool__process_synth_event(tool, event, machine, process) != 0) {
506                         rc = -1;
507                         break;
508                 }
509         }
510
511         free(event);
512         return rc;
513 }
514
515 static int __event__synthesize_thread(union perf_event *comm_event,
516                                       union perf_event *mmap_event,
517                                       union perf_event *fork_event,
518                                       union perf_event *namespaces_event,
519                                       pid_t pid, int full,
520                                       perf_event__handler_t process,
521                                       struct perf_tool *tool,
522                                       struct machine *machine,
523                                       bool mmap_data,
524                                       unsigned int proc_map_timeout)
525 {
526         char filename[PATH_MAX];
527         DIR *tasks;
528         struct dirent *dirent;
529         pid_t tgid, ppid;
530         int rc = 0;
531
532         /* special case: only send one comm event using passed in pid */
533         if (!full) {
534                 tgid = perf_event__synthesize_comm(tool, comm_event, pid,
535                                                    process, machine);
536
537                 if (tgid == -1)
538                         return -1;
539
540                 if (perf_event__synthesize_namespaces(tool, namespaces_event, pid,
541                                                       tgid, process, machine) < 0)
542                         return -1;
543
544                 /*
545                  * send mmap only for thread group leader
546                  * see thread__init_map_groups
547                  */
548                 if (pid == tgid &&
549                     perf_event__synthesize_mmap_events(tool, mmap_event, pid, tgid,
550                                                        process, machine, mmap_data,
551                                                        proc_map_timeout))
552                         return -1;
553
554                 return 0;
555         }
556
557         if (machine__is_default_guest(machine))
558                 return 0;
559
560         snprintf(filename, sizeof(filename), "%s/proc/%d/task",
561                  machine->root_dir, pid);
562
563         tasks = opendir(filename);
564         if (tasks == NULL) {
565                 pr_debug("couldn't open %s\n", filename);
566                 return 0;
567         }
568
569         while ((dirent = readdir(tasks)) != NULL) {
570                 char *end;
571                 pid_t _pid;
572
573                 _pid = strtol(dirent->d_name, &end, 10);
574                 if (*end)
575                         continue;
576
577                 rc = -1;
578                 if (perf_event__prepare_comm(comm_event, _pid, machine,
579                                              &tgid, &ppid) != 0)
580                         break;
581
582                 if (perf_event__synthesize_fork(tool, fork_event, _pid, tgid,
583                                                 ppid, process, machine) < 0)
584                         break;
585
586                 if (perf_event__synthesize_namespaces(tool, namespaces_event, _pid,
587                                                       tgid, process, machine) < 0)
588                         break;
589
590                 /*
591                  * Send the prepared comm event
592                  */
593                 if (perf_tool__process_synth_event(tool, comm_event, machine, process) != 0)
594                         break;
595
596                 rc = 0;
597                 if (_pid == pid) {
598                         /* process the parent's maps too */
599                         rc = perf_event__synthesize_mmap_events(tool, mmap_event, pid, tgid,
600                                                 process, machine, mmap_data, proc_map_timeout);
601                         if (rc)
602                                 break;
603                 }
604         }
605
606         closedir(tasks);
607         return rc;
608 }
609
610 int perf_event__synthesize_thread_map(struct perf_tool *tool,
611                                       struct thread_map *threads,
612                                       perf_event__handler_t process,
613                                       struct machine *machine,
614                                       bool mmap_data,
615                                       unsigned int proc_map_timeout)
616 {
617         union perf_event *comm_event, *mmap_event, *fork_event;
618         union perf_event *namespaces_event;
619         int err = -1, thread, j;
620
621         comm_event = malloc(sizeof(comm_event->comm) + machine->id_hdr_size);
622         if (comm_event == NULL)
623                 goto out;
624
625         mmap_event = malloc(sizeof(mmap_event->mmap2) + machine->id_hdr_size);
626         if (mmap_event == NULL)
627                 goto out_free_comm;
628
629         fork_event = malloc(sizeof(fork_event->fork) + machine->id_hdr_size);
630         if (fork_event == NULL)
631                 goto out_free_mmap;
632
633         namespaces_event = malloc(sizeof(namespaces_event->namespaces) +
634                                   (NR_NAMESPACES * sizeof(struct perf_ns_link_info)) +
635                                   machine->id_hdr_size);
636         if (namespaces_event == NULL)
637                 goto out_free_fork;
638
639         err = 0;
640         for (thread = 0; thread < threads->nr; ++thread) {
641                 if (__event__synthesize_thread(comm_event, mmap_event,
642                                                fork_event, namespaces_event,
643                                                thread_map__pid(threads, thread), 0,
644                                                process, tool, machine,
645                                                mmap_data, proc_map_timeout)) {
646                         err = -1;
647                         break;
648                 }
649
650                 /*
651                  * comm.pid is set to thread group id by
652                  * perf_event__synthesize_comm
653                  */
654                 if ((int) comm_event->comm.pid != thread_map__pid(threads, thread)) {
655                         bool need_leader = true;
656
657                         /* is thread group leader in thread_map? */
658                         for (j = 0; j < threads->nr; ++j) {
659                                 if ((int) comm_event->comm.pid == thread_map__pid(threads, j)) {
660                                         need_leader = false;
661                                         break;
662                                 }
663                         }
664
665                         /* if not, generate events for it */
666                         if (need_leader &&
667                             __event__synthesize_thread(comm_event, mmap_event,
668                                                        fork_event, namespaces_event,
669                                                        comm_event->comm.pid, 0,
670                                                        process, tool, machine,
671                                                        mmap_data, proc_map_timeout)) {
672                                 err = -1;
673                                 break;
674                         }
675                 }
676         }
677         free(namespaces_event);
678 out_free_fork:
679         free(fork_event);
680 out_free_mmap:
681         free(mmap_event);
682 out_free_comm:
683         free(comm_event);
684 out:
685         return err;
686 }
687
688 static int __perf_event__synthesize_threads(struct perf_tool *tool,
689                                             perf_event__handler_t process,
690                                             struct machine *machine,
691                                             bool mmap_data,
692                                             unsigned int proc_map_timeout,
693                                             struct dirent **dirent,
694                                             int start,
695                                             int num)
696 {
697         union perf_event *comm_event, *mmap_event, *fork_event;
698         union perf_event *namespaces_event;
699         int err = -1;
700         char *end;
701         pid_t pid;
702         int i;
703
704         comm_event = malloc(sizeof(comm_event->comm) + machine->id_hdr_size);
705         if (comm_event == NULL)
706                 goto out;
707
708         mmap_event = malloc(sizeof(mmap_event->mmap2) + machine->id_hdr_size);
709         if (mmap_event == NULL)
710                 goto out_free_comm;
711
712         fork_event = malloc(sizeof(fork_event->fork) + machine->id_hdr_size);
713         if (fork_event == NULL)
714                 goto out_free_mmap;
715
716         namespaces_event = malloc(sizeof(namespaces_event->namespaces) +
717                                   (NR_NAMESPACES * sizeof(struct perf_ns_link_info)) +
718                                   machine->id_hdr_size);
719         if (namespaces_event == NULL)
720                 goto out_free_fork;
721
722         for (i = start; i < start + num; i++) {
723                 if (!isdigit(dirent[i]->d_name[0]))
724                         continue;
725
726                 pid = (pid_t)strtol(dirent[i]->d_name, &end, 10);
727                 /* only interested in proper numerical dirents */
728                 if (*end)
729                         continue;
730                 /*
731                  * We may race with exiting thread, so don't stop just because
732                  * one thread couldn't be synthesized.
733                  */
734                 __event__synthesize_thread(comm_event, mmap_event, fork_event,
735                                            namespaces_event, pid, 1, process,
736                                            tool, machine, mmap_data,
737                                            proc_map_timeout);
738         }
739         err = 0;
740
741         free(namespaces_event);
742 out_free_fork:
743         free(fork_event);
744 out_free_mmap:
745         free(mmap_event);
746 out_free_comm:
747         free(comm_event);
748 out:
749         return err;
750 }
751
752 struct synthesize_threads_arg {
753         struct perf_tool *tool;
754         perf_event__handler_t process;
755         struct machine *machine;
756         bool mmap_data;
757         unsigned int proc_map_timeout;
758         struct dirent **dirent;
759         int num;
760         int start;
761 };
762
763 static void *synthesize_threads_worker(void *arg)
764 {
765         struct synthesize_threads_arg *args = arg;
766
767         __perf_event__synthesize_threads(args->tool, args->process,
768                                          args->machine, args->mmap_data,
769                                          args->proc_map_timeout, args->dirent,
770                                          args->start, args->num);
771         return NULL;
772 }
773
774 int perf_event__synthesize_threads(struct perf_tool *tool,
775                                    perf_event__handler_t process,
776                                    struct machine *machine,
777                                    bool mmap_data,
778                                    unsigned int proc_map_timeout,
779                                    unsigned int nr_threads_synthesize)
780 {
781         struct synthesize_threads_arg *args = NULL;
782         pthread_t *synthesize_threads = NULL;
783         char proc_path[PATH_MAX];
784         struct dirent **dirent;
785         int num_per_thread;
786         int m, n, i, j;
787         int thread_nr;
788         int base = 0;
789         int err = -1;
790
791
792         if (machine__is_default_guest(machine))
793                 return 0;
794
795         snprintf(proc_path, sizeof(proc_path), "%s/proc", machine->root_dir);
796         n = scandir(proc_path, &dirent, 0, alphasort);
797         if (n < 0)
798                 return err;
799
800         if (nr_threads_synthesize == UINT_MAX)
801                 thread_nr = sysconf(_SC_NPROCESSORS_ONLN);
802         else
803                 thread_nr = nr_threads_synthesize;
804
805         if (thread_nr <= 1) {
806                 err = __perf_event__synthesize_threads(tool, process,
807                                                        machine, mmap_data,
808                                                        proc_map_timeout,
809                                                        dirent, base, n);
810                 goto free_dirent;
811         }
812         if (thread_nr > n)
813                 thread_nr = n;
814
815         synthesize_threads = calloc(sizeof(pthread_t), thread_nr);
816         if (synthesize_threads == NULL)
817                 goto free_dirent;
818
819         args = calloc(sizeof(*args), thread_nr);
820         if (args == NULL)
821                 goto free_threads;
822
823         num_per_thread = n / thread_nr;
824         m = n % thread_nr;
825         for (i = 0; i < thread_nr; i++) {
826                 args[i].tool = tool;
827                 args[i].process = process;
828                 args[i].machine = machine;
829                 args[i].mmap_data = mmap_data;
830                 args[i].proc_map_timeout = proc_map_timeout;
831                 args[i].dirent = dirent;
832         }
833         for (i = 0; i < m; i++) {
834                 args[i].num = num_per_thread + 1;
835                 args[i].start = i * args[i].num;
836         }
837         if (i != 0)
838                 base = args[i-1].start + args[i-1].num;
839         for (j = i; j < thread_nr; j++) {
840                 args[j].num = num_per_thread;
841                 args[j].start = base + (j - i) * args[i].num;
842         }
843
844         for (i = 0; i < thread_nr; i++) {
845                 if (pthread_create(&synthesize_threads[i], NULL,
846                                    synthesize_threads_worker, &args[i]))
847                         goto out_join;
848         }
849         err = 0;
850 out_join:
851         for (i = 0; i < thread_nr; i++)
852                 pthread_join(synthesize_threads[i], NULL);
853         free(args);
854 free_threads:
855         free(synthesize_threads);
856 free_dirent:
857         for (i = 0; i < n; i++)
858                 free(dirent[i]);
859         free(dirent);
860
861         return err;
862 }
863
864 struct process_symbol_args {
865         const char *name;
866         u64        start;
867 };
868
869 static int find_symbol_cb(void *arg, const char *name, char type,
870                           u64 start)
871 {
872         struct process_symbol_args *args = arg;
873
874         /*
875          * Must be a function or at least an alias, as in PARISC64, where "_text" is
876          * an 'A' to the same address as "_stext".
877          */
878         if (!(kallsyms__is_function(type) ||
879               type == 'A') || strcmp(name, args->name))
880                 return 0;
881
882         args->start = start;
883         return 1;
884 }
885
886 int kallsyms__get_function_start(const char *kallsyms_filename,
887                                  const char *symbol_name, u64 *addr)
888 {
889         struct process_symbol_args args = { .name = symbol_name, };
890
891         if (kallsyms__parse(kallsyms_filename, &args, find_symbol_cb) <= 0)
892                 return -1;
893
894         *addr = args.start;
895         return 0;
896 }
897
898 int __weak perf_event__synthesize_extra_kmaps(struct perf_tool *tool __maybe_unused,
899                                               perf_event__handler_t process __maybe_unused,
900                                               struct machine *machine __maybe_unused)
901 {
902         return 0;
903 }
904
905 static int __perf_event__synthesize_kernel_mmap(struct perf_tool *tool,
906                                                 perf_event__handler_t process,
907                                                 struct machine *machine)
908 {
909         size_t size;
910         struct map *map = machine__kernel_map(machine);
911         struct kmap *kmap;
912         int err;
913         union perf_event *event;
914
915         if (map == NULL)
916                 return -1;
917
918         kmap = map__kmap(map);
919         if (!kmap->ref_reloc_sym)
920                 return -1;
921
922         /*
923          * We should get this from /sys/kernel/sections/.text, but till that is
924          * available use this, and after it is use this as a fallback for older
925          * kernels.
926          */
927         event = zalloc((sizeof(event->mmap) + machine->id_hdr_size));
928         if (event == NULL) {
929                 pr_debug("Not enough memory synthesizing mmap event "
930                          "for kernel modules\n");
931                 return -1;
932         }
933
934         if (machine__is_host(machine)) {
935                 /*
936                  * kernel uses PERF_RECORD_MISC_USER for user space maps,
937                  * see kernel/perf_event.c __perf_event_mmap
938                  */
939                 event->header.misc = PERF_RECORD_MISC_KERNEL;
940         } else {
941                 event->header.misc = PERF_RECORD_MISC_GUEST_KERNEL;
942         }
943
944         size = snprintf(event->mmap.filename, sizeof(event->mmap.filename),
945                         "%s%s", machine->mmap_name, kmap->ref_reloc_sym->name) + 1;
946         size = PERF_ALIGN(size, sizeof(u64));
947         event->mmap.header.type = PERF_RECORD_MMAP;
948         event->mmap.header.size = (sizeof(event->mmap) -
949                         (sizeof(event->mmap.filename) - size) + machine->id_hdr_size);
950         event->mmap.pgoff = kmap->ref_reloc_sym->addr;
951         event->mmap.start = map->start;
952         event->mmap.len   = map->end - event->mmap.start;
953         event->mmap.pid   = machine->pid;
954
955         err = perf_tool__process_synth_event(tool, event, machine, process);
956         free(event);
957
958         return err;
959 }
960
961 int perf_event__synthesize_kernel_mmap(struct perf_tool *tool,
962                                        perf_event__handler_t process,
963                                        struct machine *machine)
964 {
965         int err;
966
967         err = __perf_event__synthesize_kernel_mmap(tool, process, machine);
968         if (err < 0)
969                 return err;
970
971         return perf_event__synthesize_extra_kmaps(tool, process, machine);
972 }
973
974 int perf_event__synthesize_thread_map2(struct perf_tool *tool,
975                                       struct thread_map *threads,
976                                       perf_event__handler_t process,
977                                       struct machine *machine)
978 {
979         union perf_event *event;
980         int i, err, size;
981
982         size  = sizeof(event->thread_map);
983         size += threads->nr * sizeof(event->thread_map.entries[0]);
984
985         event = zalloc(size);
986         if (!event)
987                 return -ENOMEM;
988
989         event->header.type = PERF_RECORD_THREAD_MAP;
990         event->header.size = size;
991         event->thread_map.nr = threads->nr;
992
993         for (i = 0; i < threads->nr; i++) {
994                 struct thread_map_event_entry *entry = &event->thread_map.entries[i];
995                 char *comm = thread_map__comm(threads, i);
996
997                 if (!comm)
998                         comm = (char *) "";
999
1000                 entry->pid = thread_map__pid(threads, i);
1001                 strncpy((char *) &entry->comm, comm, sizeof(entry->comm));
1002         }
1003
1004         err = process(tool, event, NULL, machine);
1005
1006         free(event);
1007         return err;
1008 }
1009
1010 static void synthesize_cpus(struct cpu_map_entries *cpus,
1011                             struct cpu_map *map)
1012 {
1013         int i;
1014
1015         cpus->nr = map->nr;
1016
1017         for (i = 0; i < map->nr; i++)
1018                 cpus->cpu[i] = map->map[i];
1019 }
1020
1021 static void synthesize_mask(struct cpu_map_mask *mask,
1022                             struct cpu_map *map, int max)
1023 {
1024         int i;
1025
1026         mask->nr = BITS_TO_LONGS(max);
1027         mask->long_size = sizeof(long);
1028
1029         for (i = 0; i < map->nr; i++)
1030                 set_bit(map->map[i], mask->mask);
1031 }
1032
1033 static size_t cpus_size(struct cpu_map *map)
1034 {
1035         return sizeof(struct cpu_map_entries) + map->nr * sizeof(u16);
1036 }
1037
1038 static size_t mask_size(struct cpu_map *map, int *max)
1039 {
1040         int i;
1041
1042         *max = 0;
1043
1044         for (i = 0; i < map->nr; i++) {
1045                 /* bit possition of the cpu is + 1 */
1046                 int bit = map->map[i] + 1;
1047
1048                 if (bit > *max)
1049                         *max = bit;
1050         }
1051
1052         return sizeof(struct cpu_map_mask) + BITS_TO_LONGS(*max) * sizeof(long);
1053 }
1054
1055 void *cpu_map_data__alloc(struct cpu_map *map, size_t *size, u16 *type, int *max)
1056 {
1057         size_t size_cpus, size_mask;
1058         bool is_dummy = cpu_map__empty(map);
1059
1060         /*
1061          * Both array and mask data have variable size based
1062          * on the number of cpus and their actual values.
1063          * The size of the 'struct cpu_map_data' is:
1064          *
1065          *   array = size of 'struct cpu_map_entries' +
1066          *           number of cpus * sizeof(u64)
1067          *
1068          *   mask  = size of 'struct cpu_map_mask' +
1069          *           maximum cpu bit converted to size of longs
1070          *
1071          * and finaly + the size of 'struct cpu_map_data'.
1072          */
1073         size_cpus = cpus_size(map);
1074         size_mask = mask_size(map, max);
1075
1076         if (is_dummy || (size_cpus < size_mask)) {
1077                 *size += size_cpus;
1078                 *type  = PERF_CPU_MAP__CPUS;
1079         } else {
1080                 *size += size_mask;
1081                 *type  = PERF_CPU_MAP__MASK;
1082         }
1083
1084         *size += sizeof(struct cpu_map_data);
1085         *size = PERF_ALIGN(*size, sizeof(u64));
1086         return zalloc(*size);
1087 }
1088
1089 void cpu_map_data__synthesize(struct cpu_map_data *data, struct cpu_map *map,
1090                               u16 type, int max)
1091 {
1092         data->type = type;
1093
1094         switch (type) {
1095         case PERF_CPU_MAP__CPUS:
1096                 synthesize_cpus((struct cpu_map_entries *) data->data, map);
1097                 break;
1098         case PERF_CPU_MAP__MASK:
1099                 synthesize_mask((struct cpu_map_mask *) data->data, map, max);
1100         default:
1101                 break;
1102         };
1103 }
1104
1105 static struct cpu_map_event* cpu_map_event__new(struct cpu_map *map)
1106 {
1107         size_t size = sizeof(struct cpu_map_event);
1108         struct cpu_map_event *event;
1109         int max;
1110         u16 type;
1111
1112         event = cpu_map_data__alloc(map, &size, &type, &max);
1113         if (!event)
1114                 return NULL;
1115
1116         event->header.type = PERF_RECORD_CPU_MAP;
1117         event->header.size = size;
1118         event->data.type   = type;
1119
1120         cpu_map_data__synthesize(&event->data, map, type, max);
1121         return event;
1122 }
1123
1124 int perf_event__synthesize_cpu_map(struct perf_tool *tool,
1125                                    struct cpu_map *map,
1126                                    perf_event__handler_t process,
1127                                    struct machine *machine)
1128 {
1129         struct cpu_map_event *event;
1130         int err;
1131
1132         event = cpu_map_event__new(map);
1133         if (!event)
1134                 return -ENOMEM;
1135
1136         err = process(tool, (union perf_event *) event, NULL, machine);
1137
1138         free(event);
1139         return err;
1140 }
1141
1142 int perf_event__synthesize_stat_config(struct perf_tool *tool,
1143                                        struct perf_stat_config *config,
1144                                        perf_event__handler_t process,
1145                                        struct machine *machine)
1146 {
1147         struct stat_config_event *event;
1148         int size, i = 0, err;
1149
1150         size  = sizeof(*event);
1151         size += (PERF_STAT_CONFIG_TERM__MAX * sizeof(event->data[0]));
1152
1153         event = zalloc(size);
1154         if (!event)
1155                 return -ENOMEM;
1156
1157         event->header.type = PERF_RECORD_STAT_CONFIG;
1158         event->header.size = size;
1159         event->nr          = PERF_STAT_CONFIG_TERM__MAX;
1160
1161 #define ADD(__term, __val)                                      \
1162         event->data[i].tag = PERF_STAT_CONFIG_TERM__##__term;   \
1163         event->data[i].val = __val;                             \
1164         i++;
1165
1166         ADD(AGGR_MODE,  config->aggr_mode)
1167         ADD(INTERVAL,   config->interval)
1168         ADD(SCALE,      config->scale)
1169
1170         WARN_ONCE(i != PERF_STAT_CONFIG_TERM__MAX,
1171                   "stat config terms unbalanced\n");
1172 #undef ADD
1173
1174         err = process(tool, (union perf_event *) event, NULL, machine);
1175
1176         free(event);
1177         return err;
1178 }
1179
1180 int perf_event__synthesize_stat(struct perf_tool *tool,
1181                                 u32 cpu, u32 thread, u64 id,
1182                                 struct perf_counts_values *count,
1183                                 perf_event__handler_t process,
1184                                 struct machine *machine)
1185 {
1186         struct stat_event event;
1187
1188         event.header.type = PERF_RECORD_STAT;
1189         event.header.size = sizeof(event);
1190         event.header.misc = 0;
1191
1192         event.id        = id;
1193         event.cpu       = cpu;
1194         event.thread    = thread;
1195         event.val       = count->val;
1196         event.ena       = count->ena;
1197         event.run       = count->run;
1198
1199         return process(tool, (union perf_event *) &event, NULL, machine);
1200 }
1201
1202 int perf_event__synthesize_stat_round(struct perf_tool *tool,
1203                                       u64 evtime, u64 type,
1204                                       perf_event__handler_t process,
1205                                       struct machine *machine)
1206 {
1207         struct stat_round_event event;
1208
1209         event.header.type = PERF_RECORD_STAT_ROUND;
1210         event.header.size = sizeof(event);
1211         event.header.misc = 0;
1212
1213         event.time = evtime;
1214         event.type = type;
1215
1216         return process(tool, (union perf_event *) &event, NULL, machine);
1217 }
1218
1219 void perf_event__read_stat_config(struct perf_stat_config *config,
1220                                   struct stat_config_event *event)
1221 {
1222         unsigned i;
1223
1224         for (i = 0; i < event->nr; i++) {
1225
1226                 switch (event->data[i].tag) {
1227 #define CASE(__term, __val)                                     \
1228                 case PERF_STAT_CONFIG_TERM__##__term:           \
1229                         config->__val = event->data[i].val;     \
1230                         break;
1231
1232                 CASE(AGGR_MODE, aggr_mode)
1233                 CASE(SCALE,     scale)
1234                 CASE(INTERVAL,  interval)
1235 #undef CASE
1236                 default:
1237                         pr_warning("unknown stat config term %" PRIu64 "\n",
1238                                    event->data[i].tag);
1239                 }
1240         }
1241 }
1242
1243 size_t perf_event__fprintf_comm(union perf_event *event, FILE *fp)
1244 {
1245         const char *s;
1246
1247         if (event->header.misc & PERF_RECORD_MISC_COMM_EXEC)
1248                 s = " exec";
1249         else
1250                 s = "";
1251
1252         return fprintf(fp, "%s: %s:%d/%d\n", s, event->comm.comm, event->comm.pid, event->comm.tid);
1253 }
1254
1255 size_t perf_event__fprintf_namespaces(union perf_event *event, FILE *fp)
1256 {
1257         size_t ret = 0;
1258         struct perf_ns_link_info *ns_link_info;
1259         u32 nr_namespaces, idx;
1260
1261         ns_link_info = event->namespaces.link_info;
1262         nr_namespaces = event->namespaces.nr_namespaces;
1263
1264         ret += fprintf(fp, " %d/%d - nr_namespaces: %u\n\t\t[",
1265                        event->namespaces.pid,
1266                        event->namespaces.tid,
1267                        nr_namespaces);
1268
1269         for (idx = 0; idx < nr_namespaces; idx++) {
1270                 if (idx && (idx % 4 == 0))
1271                         ret += fprintf(fp, "\n\t\t ");
1272
1273                 ret  += fprintf(fp, "%u/%s: %" PRIu64 "/%#" PRIx64 "%s", idx,
1274                                 perf_ns__name(idx), (u64)ns_link_info[idx].dev,
1275                                 (u64)ns_link_info[idx].ino,
1276                                 ((idx + 1) != nr_namespaces) ? ", " : "]\n");
1277         }
1278
1279         return ret;
1280 }
1281
1282 int perf_event__process_comm(struct perf_tool *tool __maybe_unused,
1283                              union perf_event *event,
1284                              struct perf_sample *sample,
1285                              struct machine *machine)
1286 {
1287         return machine__process_comm_event(machine, event, sample);
1288 }
1289
1290 int perf_event__process_namespaces(struct perf_tool *tool __maybe_unused,
1291                                    union perf_event *event,
1292                                    struct perf_sample *sample,
1293                                    struct machine *machine)
1294 {
1295         return machine__process_namespaces_event(machine, event, sample);
1296 }
1297
1298 int perf_event__process_lost(struct perf_tool *tool __maybe_unused,
1299                              union perf_event *event,
1300                              struct perf_sample *sample,
1301                              struct machine *machine)
1302 {
1303         return machine__process_lost_event(machine, event, sample);
1304 }
1305
1306 int perf_event__process_aux(struct perf_tool *tool __maybe_unused,
1307                             union perf_event *event,
1308                             struct perf_sample *sample __maybe_unused,
1309                             struct machine *machine)
1310 {
1311         return machine__process_aux_event(machine, event);
1312 }
1313
1314 int perf_event__process_itrace_start(struct perf_tool *tool __maybe_unused,
1315                                      union perf_event *event,
1316                                      struct perf_sample *sample __maybe_unused,
1317                                      struct machine *machine)
1318 {
1319         return machine__process_itrace_start_event(machine, event);
1320 }
1321
1322 int perf_event__process_lost_samples(struct perf_tool *tool __maybe_unused,
1323                                      union perf_event *event,
1324                                      struct perf_sample *sample,
1325                                      struct machine *machine)
1326 {
1327         return machine__process_lost_samples_event(machine, event, sample);
1328 }
1329
1330 int perf_event__process_switch(struct perf_tool *tool __maybe_unused,
1331                                union perf_event *event,
1332                                struct perf_sample *sample __maybe_unused,
1333                                struct machine *machine)
1334 {
1335         return machine__process_switch_event(machine, event);
1336 }
1337
1338 size_t perf_event__fprintf_mmap(union perf_event *event, FILE *fp)
1339 {
1340         return fprintf(fp, " %d/%d: [%#" PRIx64 "(%#" PRIx64 ") @ %#" PRIx64 "]: %c %s\n",
1341                        event->mmap.pid, event->mmap.tid, event->mmap.start,
1342                        event->mmap.len, event->mmap.pgoff,
1343                        (event->header.misc & PERF_RECORD_MISC_MMAP_DATA) ? 'r' : 'x',
1344                        event->mmap.filename);
1345 }
1346
1347 size_t perf_event__fprintf_mmap2(union perf_event *event, FILE *fp)
1348 {
1349         return fprintf(fp, " %d/%d: [%#" PRIx64 "(%#" PRIx64 ") @ %#" PRIx64
1350                            " %02x:%02x %"PRIu64" %"PRIu64"]: %c%c%c%c %s\n",
1351                        event->mmap2.pid, event->mmap2.tid, event->mmap2.start,
1352                        event->mmap2.len, event->mmap2.pgoff, event->mmap2.maj,
1353                        event->mmap2.min, event->mmap2.ino,
1354                        event->mmap2.ino_generation,
1355                        (event->mmap2.prot & PROT_READ) ? 'r' : '-',
1356                        (event->mmap2.prot & PROT_WRITE) ? 'w' : '-',
1357                        (event->mmap2.prot & PROT_EXEC) ? 'x' : '-',
1358                        (event->mmap2.flags & MAP_SHARED) ? 's' : 'p',
1359                        event->mmap2.filename);
1360 }
1361
1362 size_t perf_event__fprintf_thread_map(union perf_event *event, FILE *fp)
1363 {
1364         struct thread_map *threads = thread_map__new_event(&event->thread_map);
1365         size_t ret;
1366
1367         ret = fprintf(fp, " nr: ");
1368
1369         if (threads)
1370                 ret += thread_map__fprintf(threads, fp);
1371         else
1372                 ret += fprintf(fp, "failed to get threads from event\n");
1373
1374         thread_map__put(threads);
1375         return ret;
1376 }
1377
1378 size_t perf_event__fprintf_cpu_map(union perf_event *event, FILE *fp)
1379 {
1380         struct cpu_map *cpus = cpu_map__new_data(&event->cpu_map.data);
1381         size_t ret;
1382
1383         ret = fprintf(fp, ": ");
1384
1385         if (cpus)
1386                 ret += cpu_map__fprintf(cpus, fp);
1387         else
1388                 ret += fprintf(fp, "failed to get cpumap from event\n");
1389
1390         cpu_map__put(cpus);
1391         return ret;
1392 }
1393
1394 int perf_event__process_mmap(struct perf_tool *tool __maybe_unused,
1395                              union perf_event *event,
1396                              struct perf_sample *sample,
1397                              struct machine *machine)
1398 {
1399         return machine__process_mmap_event(machine, event, sample);
1400 }
1401
1402 int perf_event__process_mmap2(struct perf_tool *tool __maybe_unused,
1403                              union perf_event *event,
1404                              struct perf_sample *sample,
1405                              struct machine *machine)
1406 {
1407         return machine__process_mmap2_event(machine, event, sample);
1408 }
1409
1410 size_t perf_event__fprintf_task(union perf_event *event, FILE *fp)
1411 {
1412         return fprintf(fp, "(%d:%d):(%d:%d)\n",
1413                        event->fork.pid, event->fork.tid,
1414                        event->fork.ppid, event->fork.ptid);
1415 }
1416
1417 int perf_event__process_fork(struct perf_tool *tool __maybe_unused,
1418                              union perf_event *event,
1419                              struct perf_sample *sample,
1420                              struct machine *machine)
1421 {
1422         return machine__process_fork_event(machine, event, sample);
1423 }
1424
1425 int perf_event__process_exit(struct perf_tool *tool __maybe_unused,
1426                              union perf_event *event,
1427                              struct perf_sample *sample,
1428                              struct machine *machine)
1429 {
1430         return machine__process_exit_event(machine, event, sample);
1431 }
1432
1433 size_t perf_event__fprintf_aux(union perf_event *event, FILE *fp)
1434 {
1435         return fprintf(fp, " offset: %#"PRIx64" size: %#"PRIx64" flags: %#"PRIx64" [%s%s%s]\n",
1436                        event->aux.aux_offset, event->aux.aux_size,
1437                        event->aux.flags,
1438                        event->aux.flags & PERF_AUX_FLAG_TRUNCATED ? "T" : "",
1439                        event->aux.flags & PERF_AUX_FLAG_OVERWRITE ? "O" : "",
1440                        event->aux.flags & PERF_AUX_FLAG_PARTIAL   ? "P" : "");
1441 }
1442
1443 size_t perf_event__fprintf_itrace_start(union perf_event *event, FILE *fp)
1444 {
1445         return fprintf(fp, " pid: %u tid: %u\n",
1446                        event->itrace_start.pid, event->itrace_start.tid);
1447 }
1448
1449 size_t perf_event__fprintf_switch(union perf_event *event, FILE *fp)
1450 {
1451         bool out = event->header.misc & PERF_RECORD_MISC_SWITCH_OUT;
1452         const char *in_out = !out ? "IN         " :
1453                 !(event->header.misc & PERF_RECORD_MISC_SWITCH_OUT_PREEMPT) ?
1454                                     "OUT        " : "OUT preempt";
1455
1456         if (event->header.type == PERF_RECORD_SWITCH)
1457                 return fprintf(fp, " %s\n", in_out);
1458
1459         return fprintf(fp, " %s  %s pid/tid: %5u/%-5u\n",
1460                        in_out, out ? "next" : "prev",
1461                        event->context_switch.next_prev_pid,
1462                        event->context_switch.next_prev_tid);
1463 }
1464
1465 static size_t perf_event__fprintf_lost(union perf_event *event, FILE *fp)
1466 {
1467         return fprintf(fp, " lost %" PRIu64 "\n", event->lost.lost);
1468 }
1469
1470 size_t perf_event__fprintf(union perf_event *event, FILE *fp)
1471 {
1472         size_t ret = fprintf(fp, "PERF_RECORD_%s",
1473                              perf_event__name(event->header.type));
1474
1475         switch (event->header.type) {
1476         case PERF_RECORD_COMM:
1477                 ret += perf_event__fprintf_comm(event, fp);
1478                 break;
1479         case PERF_RECORD_FORK:
1480         case PERF_RECORD_EXIT:
1481                 ret += perf_event__fprintf_task(event, fp);
1482                 break;
1483         case PERF_RECORD_MMAP:
1484                 ret += perf_event__fprintf_mmap(event, fp);
1485                 break;
1486         case PERF_RECORD_NAMESPACES:
1487                 ret += perf_event__fprintf_namespaces(event, fp);
1488                 break;
1489         case PERF_RECORD_MMAP2:
1490                 ret += perf_event__fprintf_mmap2(event, fp);
1491                 break;
1492         case PERF_RECORD_AUX:
1493                 ret += perf_event__fprintf_aux(event, fp);
1494                 break;
1495         case PERF_RECORD_ITRACE_START:
1496                 ret += perf_event__fprintf_itrace_start(event, fp);
1497                 break;
1498         case PERF_RECORD_SWITCH:
1499         case PERF_RECORD_SWITCH_CPU_WIDE:
1500                 ret += perf_event__fprintf_switch(event, fp);
1501                 break;
1502         case PERF_RECORD_LOST:
1503                 ret += perf_event__fprintf_lost(event, fp);
1504                 break;
1505         default:
1506                 ret += fprintf(fp, "\n");
1507         }
1508
1509         return ret;
1510 }
1511
1512 int perf_event__process(struct perf_tool *tool __maybe_unused,
1513                         union perf_event *event,
1514                         struct perf_sample *sample,
1515                         struct machine *machine)
1516 {
1517         return machine__process_event(machine, event, sample);
1518 }
1519
1520 struct map *thread__find_map(struct thread *thread, u8 cpumode, u64 addr,
1521                              struct addr_location *al)
1522 {
1523         struct map_groups *mg = thread->mg;
1524         struct machine *machine = mg->machine;
1525         bool load_map = false;
1526
1527         al->machine = machine;
1528         al->thread = thread;
1529         al->addr = addr;
1530         al->cpumode = cpumode;
1531         al->filtered = 0;
1532
1533         if (machine == NULL) {
1534                 al->map = NULL;
1535                 return NULL;
1536         }
1537
1538         if (cpumode == PERF_RECORD_MISC_KERNEL && perf_host) {
1539                 al->level = 'k';
1540                 mg = &machine->kmaps;
1541                 load_map = true;
1542         } else if (cpumode == PERF_RECORD_MISC_USER && perf_host) {
1543                 al->level = '.';
1544         } else if (cpumode == PERF_RECORD_MISC_GUEST_KERNEL && perf_guest) {
1545                 al->level = 'g';
1546                 mg = &machine->kmaps;
1547                 load_map = true;
1548         } else if (cpumode == PERF_RECORD_MISC_GUEST_USER && perf_guest) {
1549                 al->level = 'u';
1550         } else {
1551                 al->level = 'H';
1552                 al->map = NULL;
1553
1554                 if ((cpumode == PERF_RECORD_MISC_GUEST_USER ||
1555                         cpumode == PERF_RECORD_MISC_GUEST_KERNEL) &&
1556                         !perf_guest)
1557                         al->filtered |= (1 << HIST_FILTER__GUEST);
1558                 if ((cpumode == PERF_RECORD_MISC_USER ||
1559                         cpumode == PERF_RECORD_MISC_KERNEL) &&
1560                         !perf_host)
1561                         al->filtered |= (1 << HIST_FILTER__HOST);
1562
1563                 return NULL;
1564         }
1565
1566         al->map = map_groups__find(mg, al->addr);
1567         if (al->map != NULL) {
1568                 /*
1569                  * Kernel maps might be changed when loading symbols so loading
1570                  * must be done prior to using kernel maps.
1571                  */
1572                 if (load_map)
1573                         map__load(al->map);
1574                 al->addr = al->map->map_ip(al->map, al->addr);
1575         }
1576
1577         return al->map;
1578 }
1579
1580 /*
1581  * For branch stacks or branch samples, the sample cpumode might not be correct
1582  * because it applies only to the sample 'ip' and not necessary to 'addr' or
1583  * branch stack addresses. If possible, use a fallback to deal with those cases.
1584  */
1585 struct map *thread__find_map_fb(struct thread *thread, u8 cpumode, u64 addr,
1586                                 struct addr_location *al)
1587 {
1588         struct map *map = thread__find_map(thread, cpumode, addr, al);
1589         struct machine *machine = thread->mg->machine;
1590         u8 addr_cpumode = machine__addr_cpumode(machine, cpumode, addr);
1591
1592         if (map || addr_cpumode == cpumode)
1593                 return map;
1594
1595         return thread__find_map(thread, addr_cpumode, addr, al);
1596 }
1597
1598 struct symbol *thread__find_symbol(struct thread *thread, u8 cpumode,
1599                                    u64 addr, struct addr_location *al)
1600 {
1601         al->sym = NULL;
1602         if (thread__find_map(thread, cpumode, addr, al))
1603                 al->sym = map__find_symbol(al->map, al->addr);
1604         return al->sym;
1605 }
1606
1607 struct symbol *thread__find_symbol_fb(struct thread *thread, u8 cpumode,
1608                                       u64 addr, struct addr_location *al)
1609 {
1610         al->sym = NULL;
1611         if (thread__find_map_fb(thread, cpumode, addr, al))
1612                 al->sym = map__find_symbol(al->map, al->addr);
1613         return al->sym;
1614 }
1615
1616 /*
1617  * Callers need to drop the reference to al->thread, obtained in
1618  * machine__findnew_thread()
1619  */
1620 int machine__resolve(struct machine *machine, struct addr_location *al,
1621                      struct perf_sample *sample)
1622 {
1623         struct thread *thread = machine__findnew_thread(machine, sample->pid,
1624                                                         sample->tid);
1625
1626         if (thread == NULL)
1627                 return -1;
1628
1629         dump_printf(" ... thread: %s:%d\n", thread__comm_str(thread), thread->tid);
1630         thread__find_map(thread, sample->cpumode, sample->ip, al);
1631         dump_printf(" ...... dso: %s\n",
1632                     al->map ? al->map->dso->long_name :
1633                         al->level == 'H' ? "[hypervisor]" : "<not found>");
1634
1635         if (thread__is_filtered(thread))
1636                 al->filtered |= (1 << HIST_FILTER__THREAD);
1637
1638         al->sym = NULL;
1639         al->cpu = sample->cpu;
1640         al->socket = -1;
1641         al->srcline = NULL;
1642
1643         if (al->cpu >= 0) {
1644                 struct perf_env *env = machine->env;
1645
1646                 if (env && env->cpu)
1647                         al->socket = env->cpu[al->cpu].socket_id;
1648         }
1649
1650         if (al->map) {
1651                 struct dso *dso = al->map->dso;
1652
1653                 if (symbol_conf.dso_list &&
1654                     (!dso || !(strlist__has_entry(symbol_conf.dso_list,
1655                                                   dso->short_name) ||
1656                                (dso->short_name != dso->long_name &&
1657                                 strlist__has_entry(symbol_conf.dso_list,
1658                                                    dso->long_name))))) {
1659                         al->filtered |= (1 << HIST_FILTER__DSO);
1660                 }
1661
1662                 al->sym = map__find_symbol(al->map, al->addr);
1663         } else if (symbol_conf.dso_list) {
1664                 al->filtered |= (1 << HIST_FILTER__DSO);
1665         }
1666
1667         if (symbol_conf.sym_list &&
1668                 (!al->sym || !strlist__has_entry(symbol_conf.sym_list,
1669                                                 al->sym->name))) {
1670                 al->filtered |= (1 << HIST_FILTER__SYMBOL);
1671         }
1672
1673         return 0;
1674 }
1675
1676 /*
1677  * The preprocess_sample method will return with reference counts for the
1678  * in it, when done using (and perhaps getting ref counts if needing to
1679  * keep a pointer to one of those entries) it must be paired with
1680  * addr_location__put(), so that the refcounts can be decremented.
1681  */
1682 void addr_location__put(struct addr_location *al)
1683 {
1684         thread__zput(al->thread);
1685 }
1686
1687 bool is_bts_event(struct perf_event_attr *attr)
1688 {
1689         return attr->type == PERF_TYPE_HARDWARE &&
1690                (attr->config & PERF_COUNT_HW_BRANCH_INSTRUCTIONS) &&
1691                attr->sample_period == 1;
1692 }
1693
1694 bool sample_addr_correlates_sym(struct perf_event_attr *attr)
1695 {
1696         if (attr->type == PERF_TYPE_SOFTWARE &&
1697             (attr->config == PERF_COUNT_SW_PAGE_FAULTS ||
1698              attr->config == PERF_COUNT_SW_PAGE_FAULTS_MIN ||
1699              attr->config == PERF_COUNT_SW_PAGE_FAULTS_MAJ))
1700                 return true;
1701
1702         if (is_bts_event(attr))
1703                 return true;
1704
1705         return false;
1706 }
1707
1708 void thread__resolve(struct thread *thread, struct addr_location *al,
1709                      struct perf_sample *sample)
1710 {
1711         thread__find_map_fb(thread, sample->cpumode, sample->addr, al);
1712
1713         al->cpu = sample->cpu;
1714         al->sym = NULL;
1715
1716         if (al->map)
1717                 al->sym = map__find_symbol(al->map, al->addr);
1718 }