7 static struct perf_file_handler *curr_handler;
8 static unsigned long mmap_window = 32;
9 static char __cwd[PATH_MAX];
11 static int process_event_stub(event_t *event __used)
13 dump_printf(": unhandled!\n");
17 void register_perf_file_handler(struct perf_file_handler *handler)
19 if (!handler->process_sample_event)
20 handler->process_sample_event = process_event_stub;
21 if (!handler->process_mmap_event)
22 handler->process_mmap_event = process_event_stub;
23 if (!handler->process_comm_event)
24 handler->process_comm_event = process_event_stub;
25 if (!handler->process_fork_event)
26 handler->process_fork_event = process_event_stub;
27 if (!handler->process_exit_event)
28 handler->process_exit_event = process_event_stub;
29 if (!handler->process_lost_event)
30 handler->process_lost_event = process_event_stub;
31 if (!handler->process_read_event)
32 handler->process_read_event = process_event_stub;
33 if (!handler->process_throttle_event)
34 handler->process_throttle_event = process_event_stub;
35 if (!handler->process_unthrottle_event)
36 handler->process_unthrottle_event = process_event_stub;
38 curr_handler = handler;
41 static const char *event__name[] = {
43 [PERF_RECORD_MMAP] = "MMAP",
44 [PERF_RECORD_LOST] = "LOST",
45 [PERF_RECORD_COMM] = "COMM",
46 [PERF_RECORD_EXIT] = "EXIT",
47 [PERF_RECORD_THROTTLE] = "THROTTLE",
48 [PERF_RECORD_UNTHROTTLE] = "UNTHROTTLE",
49 [PERF_RECORD_FORK] = "FORK",
50 [PERF_RECORD_READ] = "READ",
51 [PERF_RECORD_SAMPLE] = "SAMPLE",
54 unsigned long event__total[PERF_RECORD_MAX];
56 void event__print_totals(void)
59 for (i = 0; i < PERF_RECORD_MAX; ++i)
60 pr_info("%10s events: %10ld\n",
61 event__name[i], event__total[i]);
65 process_event(event_t *event, unsigned long offset, unsigned long head)
69 if (event->header.type < PERF_RECORD_MAX) {
70 dump_printf("%p [%p]: PERF_RECORD_%s",
71 (void *)(offset + head),
72 (void *)(long)(event->header.size),
73 event__name[event->header.type]);
75 ++event__total[event->header.type];
78 switch (event->header.type) {
79 case PERF_RECORD_SAMPLE:
80 return curr_handler->process_sample_event(event);
81 case PERF_RECORD_MMAP:
82 return curr_handler->process_mmap_event(event);
83 case PERF_RECORD_COMM:
84 return curr_handler->process_comm_event(event);
85 case PERF_RECORD_FORK:
86 return curr_handler->process_fork_event(event);
87 case PERF_RECORD_EXIT:
88 return curr_handler->process_exit_event(event);
89 case PERF_RECORD_LOST:
90 return curr_handler->process_lost_event(event);
91 case PERF_RECORD_READ:
92 return curr_handler->process_read_event(event);
93 case PERF_RECORD_THROTTLE:
94 return curr_handler->process_throttle_event(event);
95 case PERF_RECORD_UNTHROTTLE:
96 return curr_handler->process_unthrottle_event(event);
98 curr_handler->total_unknown++;
103 int perf_header__read_build_ids(int input, u64 offset, u64 size)
105 struct build_id_event bev;
106 char filename[PATH_MAX];
107 u64 limit = offset + size;
110 while (offset < limit) {
114 if (read(input, &bev, sizeof(bev)) != sizeof(bev))
117 len = bev.header.size - sizeof(bev);
118 if (read(input, filename, len) != len)
121 dso = dsos__findnew(filename);
123 dso__set_build_id(dso, &bev.build_id);
125 offset += bev.header.size;
132 int perf_session__process_events(struct perf_session *self,
133 int full_paths, int *cwdlen, char **cwd)
136 unsigned long head, shift;
137 unsigned long offset = 0;
144 if (curr_handler == NULL) {
145 pr_debug("Forgot to register perf file handler\n");
149 page_size = getpagesize();
151 head = self->header.data_offset;
152 sample_type = perf_header__sample_type(&self->header);
155 if (curr_handler->sample_type_check &&
156 curr_handler->sample_type_check(sample_type) < 0)
160 if (getcwd(__cwd, sizeof(__cwd)) == NULL) {
161 pr_err("failed to get the current directory\n");
166 *cwdlen = strlen(*cwd);
172 shift = page_size * (head / page_size);
177 buf = mmap(NULL, page_size * mmap_window, PROT_READ,
178 MAP_SHARED, self->fd, offset);
179 if (buf == MAP_FAILED) {
180 pr_err("failed to mmap file\n");
186 event = (event_t *)(buf + head);
188 size = event->header.size;
192 if (head + event->header.size >= page_size * mmap_window) {
195 shift = page_size * (head / page_size);
197 munmap_ret = munmap(buf, page_size * mmap_window);
198 assert(munmap_ret == 0);
205 size = event->header.size;
207 dump_printf("\n%p [%p]: event: %d\n",
208 (void *)(offset + head),
209 (void *)(long)event->header.size,
212 if (!size || process_event(event, offset, head) < 0) {
214 dump_printf("%p [%p]: skipping unknown header type: %d\n",
215 (void *)(offset + head),
216 (void *)(long)(event->header.size),
220 * assume we lost track of the stream, check alignment, and
221 * increment a single u64 in the hope to catch on again 'soon'.
224 if (unlikely(head & 7))
232 if (offset + head >= self->header.data_offset + self->header.data_size)
235 if (offset + head < self->size)