7 static struct perf_file_handler *curr_handler;
8 static unsigned long mmap_window = 32;
9 static char __cwd[PATH_MAX];
12 process_event_stub(event_t *event __used,
13 unsigned long offset __used,
14 unsigned long head __used)
19 void register_perf_file_handler(struct perf_file_handler *handler)
21 if (!handler->process_sample_event)
22 handler->process_sample_event = process_event_stub;
23 if (!handler->process_mmap_event)
24 handler->process_mmap_event = process_event_stub;
25 if (!handler->process_comm_event)
26 handler->process_comm_event = process_event_stub;
27 if (!handler->process_fork_event)
28 handler->process_fork_event = process_event_stub;
29 if (!handler->process_exit_event)
30 handler->process_exit_event = process_event_stub;
31 if (!handler->process_lost_event)
32 handler->process_lost_event = process_event_stub;
33 if (!handler->process_read_event)
34 handler->process_read_event = process_event_stub;
35 if (!handler->process_throttle_event)
36 handler->process_throttle_event = process_event_stub;
37 if (!handler->process_unthrottle_event)
38 handler->process_unthrottle_event = process_event_stub;
40 curr_handler = handler;
44 process_event(event_t *event, unsigned long offset, unsigned long head)
48 switch (event->header.type) {
49 case PERF_RECORD_SAMPLE:
50 return curr_handler->process_sample_event(event, offset, head);
51 case PERF_RECORD_MMAP:
52 return curr_handler->process_mmap_event(event, offset, head);
53 case PERF_RECORD_COMM:
54 return curr_handler->process_comm_event(event, offset, head);
55 case PERF_RECORD_FORK:
56 return curr_handler->process_fork_event(event, offset, head);
57 case PERF_RECORD_EXIT:
58 return curr_handler->process_exit_event(event, offset, head);
59 case PERF_RECORD_LOST:
60 return curr_handler->process_lost_event(event, offset, head);
61 case PERF_RECORD_READ:
62 return curr_handler->process_read_event(event, offset, head);
63 case PERF_RECORD_THROTTLE:
64 return curr_handler->process_throttle_event(event, offset, head);
65 case PERF_RECORD_UNTHROTTLE:
66 return curr_handler->process_unthrottle_event(event, offset, head);
68 curr_handler->total_unknown++;
73 int perf_header__read_build_ids(int input, off_t offset, off_t size)
75 struct build_id_event bev;
76 char filename[PATH_MAX];
77 off_t limit = offset + size;
80 while (offset < limit) {
84 if (read(input, &bev, sizeof(bev)) != sizeof(bev))
87 len = bev.header.size - sizeof(bev);
88 if (read(input, filename, len) != len)
91 dso = dsos__findnew(filename);
93 dso__set_build_id(dso, &bev.build_id);
95 offset += bev.header.size;
102 int mmap_dispatch_perf_file(struct perf_header **pheader,
103 const char *input_name,
110 struct perf_header *header;
111 unsigned long head, shift;
112 unsigned long offset = 0;
113 struct stat input_stat;
121 if (curr_handler == NULL) {
122 pr_debug("Forgot to register perf file handler\n");
126 page_size = getpagesize();
128 input = open(input_name, O_RDONLY);
130 pr_err("Failed to open file: %s", input_name);
131 if (!strcmp(input_name, "perf.data"))
132 pr_err(" (try 'perf record' first)");
137 if (fstat(input, &input_stat) < 0) {
138 pr_err("failed to stat file");
144 if (!force && input_stat.st_uid && (input_stat.st_uid != geteuid())) {
145 pr_err("file: %s not owned by current user or root\n",
150 if (input_stat.st_size == 0) {
151 pr_info("zero-sized file, nothing to do!\n");
156 header = perf_header__new();
160 err = perf_header__read(header, input);
164 head = header->data_offset;
166 sample_type = perf_header__sample_type(header);
169 if (curr_handler->sample_type_check &&
170 curr_handler->sample_type_check(sample_type) < 0)
174 if (getcwd(__cwd, sizeof(__cwd)) == NULL) {
175 pr_err("failed to get the current directory\n");
180 *cwdlen = strlen(*cwd);
186 shift = page_size * (head / page_size);
191 buf = mmap(NULL, page_size * mmap_window, PROT_READ,
192 MAP_SHARED, input, offset);
193 if (buf == MAP_FAILED) {
194 pr_err("failed to mmap file\n");
200 event = (event_t *)(buf + head);
202 size = event->header.size;
206 if (head + event->header.size >= page_size * mmap_window) {
209 shift = page_size * (head / page_size);
211 munmap_ret = munmap(buf, page_size * mmap_window);
212 assert(munmap_ret == 0);
219 size = event->header.size;
221 dump_printf("\n%p [%p]: event: %d\n",
222 (void *)(offset + head),
223 (void *)(long)event->header.size,
226 if (!size || process_event(event, offset, head) < 0) {
228 dump_printf("%p [%p]: skipping unknown header type: %d\n",
229 (void *)(offset + head),
230 (void *)(long)(event->header.size),
234 * assume we lost track of the stream, check alignment, and
235 * increment a single u64 in the hope to catch on again 'soon'.
238 if (unlikely(head & 7))
246 if (offset + head >= header->data_offset + header->data_size)
249 if (offset + head < (unsigned long)input_stat.st_size)
259 perf_header__delete(header);