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1// SPDX-License-Identifier: GPL-2.0-only
2/*
3 * Copyright (C) 2009, Steven Rostedt <srostedt@redhat.com>
4 */
5#include <dirent.h>
6#include <stdio.h>
7#include <stdlib.h>
8#include <string.h>
9#include <stdarg.h>
10#include <sys/types.h>
11#include <sys/stat.h>
12#include <sys/wait.h>
13#include <sys/mman.h>
14#include <fcntl.h>
15#include <unistd.h>
16#include <errno.h>
17
18#include "trace-event.h"
19#include "debug.h"
20
21static int input_fd;
22
23static ssize_t trace_data_size;
24static bool repipe;
25
26static int __do_read(int fd, void *buf, int size)
27{
28 int rsize = size;
29
30 while (size) {
31 int ret = read(fd, buf, size);
32
33 if (ret <= 0)
34 return -1;
35
36 if (repipe) {
37 int retw = write(STDOUT_FILENO, buf, ret);
38
39 if (retw <= 0 || retw != ret) {
40 pr_debug("repiping input file");
41 return -1;
42 }
43 }
44
45 size -= ret;
46 buf += ret;
47 }
48
49 return rsize;
50}
51
52static int do_read(void *data, int size)
53{
54 int r;
55
56 r = __do_read(input_fd, data, size);
57 if (r <= 0) {
58 pr_debug("reading input file (size expected=%d received=%d)",
59 size, r);
60 return -1;
61 }
62
63 trace_data_size += r;
64
65 return r;
66}
67
68/* If it fails, the next read will report it */
69static void skip(int size)
70{
71 char buf[BUFSIZ];
72 int r;
73
74 while (size) {
75 r = size > BUFSIZ ? BUFSIZ : size;
76 do_read(buf, r);
77 size -= r;
78 };
79}
80
81static unsigned int read4(struct tep_handle *pevent)
82{
83 unsigned int data;
84
85 if (do_read(&data, 4) < 0)
86 return 0;
87 return tep_read_number(pevent, &data, 4);
88}
89
90static unsigned long long read8(struct tep_handle *pevent)
91{
92 unsigned long long data;
93
94 if (do_read(&data, 8) < 0)
95 return 0;
96 return tep_read_number(pevent, &data, 8);
97}
98
99static char *read_string(void)
100{
101 char buf[BUFSIZ];
102 char *str = NULL;
103 int size = 0;
104 off_t r;
105 char c;
106
107 for (;;) {
108 r = read(input_fd, &c, 1);
109 if (r < 0) {
110 pr_debug("reading input file");
111 goto out;
112 }
113
114 if (!r) {
115 pr_debug("no data");
116 goto out;
117 }
118
119 if (repipe) {
120 int retw = write(STDOUT_FILENO, &c, 1);
121
122 if (retw <= 0 || retw != r) {
123 pr_debug("repiping input file string");
124 goto out;
125 }
126 }
127
128 buf[size++] = c;
129
130 if (!c)
131 break;
132 }
133
134 trace_data_size += size;
135
136 str = malloc(size);
137 if (str)
138 memcpy(str, buf, size);
139out:
140 return str;
141}
142
143static int read_proc_kallsyms(struct tep_handle *pevent)
144{
145 unsigned int size;
146
147 size = read4(pevent);
148 if (!size)
149 return 0;
150 /*
151 * Just skip it, now that we configure libtraceevent to use the
152 * tools/perf/ symbol resolver.
153 *
154 * We need to skip it so that we can continue parsing old perf.data
155 * files, that contains this /proc/kallsyms payload.
156 *
157 * Newer perf.data files will have just the 4-bytes zeros "kallsyms
158 * payload", so that older tools can continue reading it and interpret
159 * it as "no kallsyms payload is present".
160 */
161 lseek(input_fd, size, SEEK_CUR);
162 trace_data_size += size;
163 return 0;
164}
165
166static int read_ftrace_printk(struct tep_handle *pevent)
167{
168 unsigned int size;
169 char *buf;
170
171 /* it can have 0 size */
172 size = read4(pevent);
173 if (!size)
174 return 0;
175
176 buf = malloc(size + 1);
177 if (buf == NULL)
178 return -1;
179
180 if (do_read(buf, size) < 0) {
181 free(buf);
182 return -1;
183 }
184
185 buf[size] = '\0';
186
187 parse_ftrace_printk(pevent, buf, size);
188
189 free(buf);
190 return 0;
191}
192
193static int read_header_files(struct tep_handle *pevent)
194{
195 unsigned long long size;
196 char *header_page;
197 char buf[BUFSIZ];
198 int ret = 0;
199
200 if (do_read(buf, 12) < 0)
201 return -1;
202
203 if (memcmp(buf, "header_page", 12) != 0) {
204 pr_debug("did not read header page");
205 return -1;
206 }
207
208 size = read8(pevent);
209
210 header_page = malloc(size);
211 if (header_page == NULL)
212 return -1;
213
214 if (do_read(header_page, size) < 0) {
215 pr_debug("did not read header page");
216 free(header_page);
217 return -1;
218 }
219
220 if (!tep_parse_header_page(pevent, header_page, size,
221 tep_get_long_size(pevent))) {
222 /*
223 * The commit field in the page is of type long,
224 * use that instead, since it represents the kernel.
225 */
226 tep_set_long_size(pevent, tep_get_header_page_size(pevent));
227 }
228 free(header_page);
229
230 if (do_read(buf, 13) < 0)
231 return -1;
232
233 if (memcmp(buf, "header_event", 13) != 0) {
234 pr_debug("did not read header event");
235 return -1;
236 }
237
238 size = read8(pevent);
239 skip(size);
240
241 return ret;
242}
243
244static int read_ftrace_file(struct tep_handle *pevent, unsigned long long size)
245{
246 int ret;
247 char *buf;
248
249 buf = malloc(size);
250 if (buf == NULL) {
251 pr_debug("memory allocation failure\n");
252 return -1;
253 }
254
255 ret = do_read(buf, size);
256 if (ret < 0) {
257 pr_debug("error reading ftrace file.\n");
258 goto out;
259 }
260
261 ret = parse_ftrace_file(pevent, buf, size);
262 if (ret < 0)
263 pr_debug("error parsing ftrace file.\n");
264out:
265 free(buf);
266 return ret;
267}
268
269static int read_event_file(struct tep_handle *pevent, char *sys,
270 unsigned long long size)
271{
272 int ret;
273 char *buf;
274
275 buf = malloc(size);
276 if (buf == NULL) {
277 pr_debug("memory allocation failure\n");
278 return -1;
279 }
280
281 ret = do_read(buf, size);
282 if (ret < 0)
283 goto out;
284
285 ret = parse_event_file(pevent, buf, size, sys);
286 if (ret < 0)
287 pr_debug("error parsing event file.\n");
288out:
289 free(buf);
290 return ret;
291}
292
293static int read_ftrace_files(struct tep_handle *pevent)
294{
295 unsigned long long size;
296 int count;
297 int i;
298 int ret;
299
300 count = read4(pevent);
301
302 for (i = 0; i < count; i++) {
303 size = read8(pevent);
304 ret = read_ftrace_file(pevent, size);
305 if (ret)
306 return ret;
307 }
308 return 0;
309}
310
311static int read_event_files(struct tep_handle *pevent)
312{
313 unsigned long long size;
314 char *sys;
315 int systems;
316 int count;
317 int i,x;
318 int ret;
319
320 systems = read4(pevent);
321
322 for (i = 0; i < systems; i++) {
323 sys = read_string();
324 if (sys == NULL)
325 return -1;
326
327 count = read4(pevent);
328
329 for (x=0; x < count; x++) {
330 size = read8(pevent);
331 ret = read_event_file(pevent, sys, size);
332 if (ret) {
333 free(sys);
334 return ret;
335 }
336 }
337 free(sys);
338 }
339 return 0;
340}
341
342static int read_saved_cmdline(struct tep_handle *pevent)
343{
344 unsigned long long size;
345 char *buf;
346 int ret;
347
348 /* it can have 0 size */
349 size = read8(pevent);
350 if (!size)
351 return 0;
352
353 buf = malloc(size + 1);
354 if (buf == NULL) {
355 pr_debug("memory allocation failure\n");
356 return -1;
357 }
358
359 ret = do_read(buf, size);
360 if (ret < 0) {
361 pr_debug("error reading saved cmdlines\n");
362 goto out;
363 }
364
365 parse_saved_cmdline(pevent, buf, size);
366 ret = 0;
367out:
368 free(buf);
369 return ret;
370}
371
372ssize_t trace_report(int fd, struct trace_event *tevent, bool __repipe)
373{
374 char buf[BUFSIZ];
375 char test[] = { 23, 8, 68 };
376 char *version;
377 int show_version = 0;
378 int show_funcs = 0;
379 int show_printk = 0;
380 ssize_t size = -1;
381 int file_bigendian;
382 int host_bigendian;
383 int file_long_size;
384 int file_page_size;
385 struct tep_handle *pevent = NULL;
386 int err;
387
388 repipe = __repipe;
389 input_fd = fd;
390
391 if (do_read(buf, 3) < 0)
392 return -1;
393 if (memcmp(buf, test, 3) != 0) {
394 pr_debug("no trace data in the file");
395 return -1;
396 }
397
398 if (do_read(buf, 7) < 0)
399 return -1;
400 if (memcmp(buf, "tracing", 7) != 0) {
401 pr_debug("not a trace file (missing 'tracing' tag)");
402 return -1;
403 }
404
405 version = read_string();
406 if (version == NULL)
407 return -1;
408 if (show_version)
409 printf("version = %s\n", version);
410
411 if (do_read(buf, 1) < 0) {
412 free(version);
413 return -1;
414 }
415 file_bigendian = buf[0];
416 host_bigendian = bigendian();
417
418 if (trace_event__init(tevent)) {
419 pr_debug("trace_event__init failed");
420 goto out;
421 }
422
423 pevent = tevent->pevent;
424
425 tep_set_flag(pevent, TEP_NSEC_OUTPUT);
426 tep_set_file_bigendian(pevent, file_bigendian);
427 tep_set_local_bigendian(pevent, host_bigendian);
428
429 if (do_read(buf, 1) < 0)
430 goto out;
431 file_long_size = buf[0];
432
433 file_page_size = read4(pevent);
434 if (!file_page_size)
435 goto out;
436
437 tep_set_long_size(pevent, file_long_size);
438 tep_set_page_size(pevent, file_page_size);
439
440 err = read_header_files(pevent);
441 if (err)
442 goto out;
443 err = read_ftrace_files(pevent);
444 if (err)
445 goto out;
446 err = read_event_files(pevent);
447 if (err)
448 goto out;
449 err = read_proc_kallsyms(pevent);
450 if (err)
451 goto out;
452 err = read_ftrace_printk(pevent);
453 if (err)
454 goto out;
455 if (atof(version) >= 0.6) {
456 err = read_saved_cmdline(pevent);
457 if (err)
458 goto out;
459 }
460
461 size = trace_data_size;
462 repipe = false;
463
464 if (show_funcs) {
465 tep_print_funcs(pevent);
466 } else if (show_printk) {
467 tep_print_printk(pevent);
468 }
469
470 pevent = NULL;
471
472out:
473 if (pevent)
474 trace_event__cleanup(tevent);
475 free(version);
476 return size;
477}
1/*
2 * Copyright (C) 2009, Steven Rostedt <srostedt@redhat.com>
3 *
4 * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
5 *
6 * This program is free software; you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License as published by
8 * the Free Software Foundation; version 2 of the License (not later!)
9 *
10 * This program is distributed in the hope that it will be useful,
11 * but WITHOUT ANY WARRANTY; without even the implied warranty of
12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
13 * GNU General Public License for more details.
14 *
15 * You should have received a copy of the GNU General Public License
16 * along with this program; if not, write to the Free Software
17 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
18 *
19 * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
20 */
21#define _FILE_OFFSET_BITS 64
22
23#include <dirent.h>
24#include <stdio.h>
25#include <stdlib.h>
26#include <string.h>
27#include <getopt.h>
28#include <stdarg.h>
29#include <sys/types.h>
30#include <sys/stat.h>
31#include <sys/wait.h>
32#include <sys/mman.h>
33#include <pthread.h>
34#include <fcntl.h>
35#include <unistd.h>
36#include <errno.h>
37
38#include "../perf.h"
39#include "util.h"
40#include "trace-event.h"
41
42static int input_fd;
43
44static int read_page;
45
46int file_bigendian;
47int host_bigendian;
48static int long_size;
49
50static unsigned long page_size;
51
52static ssize_t calc_data_size;
53static bool repipe;
54
55static void *malloc_or_die(int size)
56{
57 void *ret;
58
59 ret = malloc(size);
60 if (!ret)
61 die("malloc");
62 return ret;
63}
64
65static int do_read(int fd, void *buf, int size)
66{
67 int rsize = size;
68
69 while (size) {
70 int ret = read(fd, buf, size);
71
72 if (ret <= 0)
73 return -1;
74
75 if (repipe) {
76 int retw = write(STDOUT_FILENO, buf, ret);
77
78 if (retw <= 0 || retw != ret)
79 die("repiping input file");
80 }
81
82 size -= ret;
83 buf += ret;
84 }
85
86 return rsize;
87}
88
89static int read_or_die(void *data, int size)
90{
91 int r;
92
93 r = do_read(input_fd, data, size);
94 if (r <= 0)
95 die("reading input file (size expected=%d received=%d)",
96 size, r);
97
98 if (calc_data_size)
99 calc_data_size += r;
100
101 return r;
102}
103
104/* If it fails, the next read will report it */
105static void skip(int size)
106{
107 char buf[BUFSIZ];
108 int r;
109
110 while (size) {
111 r = size > BUFSIZ ? BUFSIZ : size;
112 read_or_die(buf, r);
113 size -= r;
114 };
115}
116
117static unsigned int read4(void)
118{
119 unsigned int data;
120
121 read_or_die(&data, 4);
122 return __data2host4(perf_pevent, data);
123}
124
125static unsigned long long read8(void)
126{
127 unsigned long long data;
128
129 read_or_die(&data, 8);
130 return __data2host8(perf_pevent, data);
131}
132
133static char *read_string(void)
134{
135 char buf[BUFSIZ];
136 char *str = NULL;
137 int size = 0;
138 off_t r;
139 char c;
140
141 for (;;) {
142 r = read(input_fd, &c, 1);
143 if (r < 0)
144 die("reading input file");
145
146 if (!r)
147 die("no data");
148
149 if (repipe) {
150 int retw = write(STDOUT_FILENO, &c, 1);
151
152 if (retw <= 0 || retw != r)
153 die("repiping input file string");
154 }
155
156 buf[size++] = c;
157
158 if (!c)
159 break;
160 }
161
162 if (calc_data_size)
163 calc_data_size += size;
164
165 str = malloc_or_die(size);
166 memcpy(str, buf, size);
167
168 return str;
169}
170
171static void read_proc_kallsyms(void)
172{
173 unsigned int size;
174 char *buf;
175
176 size = read4();
177 if (!size)
178 return;
179
180 buf = malloc_or_die(size + 1);
181 read_or_die(buf, size);
182 buf[size] = '\0';
183
184 parse_proc_kallsyms(buf, size);
185
186 free(buf);
187}
188
189static void read_ftrace_printk(void)
190{
191 unsigned int size;
192 char *buf;
193
194 size = read4();
195 if (!size)
196 return;
197
198 buf = malloc_or_die(size);
199 read_or_die(buf, size);
200
201 parse_ftrace_printk(buf, size);
202
203 free(buf);
204}
205
206static void read_header_files(void)
207{
208 unsigned long long size;
209 char *header_event;
210 char buf[BUFSIZ];
211
212 read_or_die(buf, 12);
213
214 if (memcmp(buf, "header_page", 12) != 0)
215 die("did not read header page");
216
217 size = read8();
218 skip(size);
219
220 /*
221 * The size field in the page is of type long,
222 * use that instead, since it represents the kernel.
223 */
224 long_size = header_page_size_size;
225
226 read_or_die(buf, 13);
227 if (memcmp(buf, "header_event", 13) != 0)
228 die("did not read header event");
229
230 size = read8();
231 header_event = malloc_or_die(size);
232 read_or_die(header_event, size);
233 free(header_event);
234}
235
236static void read_ftrace_file(unsigned long long size)
237{
238 char *buf;
239
240 buf = malloc_or_die(size);
241 read_or_die(buf, size);
242 parse_ftrace_file(buf, size);
243 free(buf);
244}
245
246static void read_event_file(char *sys, unsigned long long size)
247{
248 char *buf;
249
250 buf = malloc_or_die(size);
251 read_or_die(buf, size);
252 parse_event_file(buf, size, sys);
253 free(buf);
254}
255
256static void read_ftrace_files(void)
257{
258 unsigned long long size;
259 int count;
260 int i;
261
262 count = read4();
263
264 for (i = 0; i < count; i++) {
265 size = read8();
266 read_ftrace_file(size);
267 }
268}
269
270static void read_event_files(void)
271{
272 unsigned long long size;
273 char *sys;
274 int systems;
275 int count;
276 int i,x;
277
278 systems = read4();
279
280 for (i = 0; i < systems; i++) {
281 sys = read_string();
282
283 count = read4();
284 for (x=0; x < count; x++) {
285 size = read8();
286 read_event_file(sys, size);
287 }
288 }
289}
290
291struct cpu_data {
292 unsigned long long offset;
293 unsigned long long size;
294 unsigned long long timestamp;
295 struct pevent_record *next;
296 char *page;
297 int cpu;
298 int index;
299 int page_size;
300};
301
302static struct cpu_data *cpu_data;
303
304static void update_cpu_data_index(int cpu)
305{
306 cpu_data[cpu].offset += page_size;
307 cpu_data[cpu].size -= page_size;
308 cpu_data[cpu].index = 0;
309}
310
311static void get_next_page(int cpu)
312{
313 off_t save_seek;
314 off_t ret;
315
316 if (!cpu_data[cpu].page)
317 return;
318
319 if (read_page) {
320 if (cpu_data[cpu].size <= page_size) {
321 free(cpu_data[cpu].page);
322 cpu_data[cpu].page = NULL;
323 return;
324 }
325
326 update_cpu_data_index(cpu);
327
328 /* other parts of the code may expect the pointer to not move */
329 save_seek = lseek(input_fd, 0, SEEK_CUR);
330
331 ret = lseek(input_fd, cpu_data[cpu].offset, SEEK_SET);
332 if (ret == (off_t)-1)
333 die("failed to lseek");
334 ret = read(input_fd, cpu_data[cpu].page, page_size);
335 if (ret < 0)
336 die("failed to read page");
337
338 /* reset the file pointer back */
339 lseek(input_fd, save_seek, SEEK_SET);
340
341 return;
342 }
343
344 munmap(cpu_data[cpu].page, page_size);
345 cpu_data[cpu].page = NULL;
346
347 if (cpu_data[cpu].size <= page_size)
348 return;
349
350 update_cpu_data_index(cpu);
351
352 cpu_data[cpu].page = mmap(NULL, page_size, PROT_READ, MAP_PRIVATE,
353 input_fd, cpu_data[cpu].offset);
354 if (cpu_data[cpu].page == MAP_FAILED)
355 die("failed to mmap cpu %d at offset 0x%llx",
356 cpu, cpu_data[cpu].offset);
357}
358
359static unsigned int type_len4host(unsigned int type_len_ts)
360{
361 if (file_bigendian)
362 return (type_len_ts >> 27) & ((1 << 5) - 1);
363 else
364 return type_len_ts & ((1 << 5) - 1);
365}
366
367static unsigned int ts4host(unsigned int type_len_ts)
368{
369 if (file_bigendian)
370 return type_len_ts & ((1 << 27) - 1);
371 else
372 return type_len_ts >> 5;
373}
374
375static int calc_index(void *ptr, int cpu)
376{
377 return (unsigned long)ptr - (unsigned long)cpu_data[cpu].page;
378}
379
380struct pevent_record *trace_peek_data(int cpu)
381{
382 struct pevent_record *data;
383 void *page = cpu_data[cpu].page;
384 int idx = cpu_data[cpu].index;
385 void *ptr = page + idx;
386 unsigned long long extend;
387 unsigned int type_len_ts;
388 unsigned int type_len;
389 unsigned int delta;
390 unsigned int length = 0;
391
392 if (cpu_data[cpu].next)
393 return cpu_data[cpu].next;
394
395 if (!page)
396 return NULL;
397
398 if (!idx) {
399 /* FIXME: handle header page */
400 if (header_page_ts_size != 8)
401 die("expected a long long type for timestamp");
402 cpu_data[cpu].timestamp = data2host8(perf_pevent, ptr);
403 ptr += 8;
404 switch (header_page_size_size) {
405 case 4:
406 cpu_data[cpu].page_size = data2host4(perf_pevent, ptr);
407 ptr += 4;
408 break;
409 case 8:
410 cpu_data[cpu].page_size = data2host8(perf_pevent, ptr);
411 ptr += 8;
412 break;
413 default:
414 die("bad long size");
415 }
416 ptr = cpu_data[cpu].page + header_page_data_offset;
417 }
418
419read_again:
420 idx = calc_index(ptr, cpu);
421
422 if (idx >= cpu_data[cpu].page_size) {
423 get_next_page(cpu);
424 return trace_peek_data(cpu);
425 }
426
427 type_len_ts = data2host4(perf_pevent, ptr);
428 ptr += 4;
429
430 type_len = type_len4host(type_len_ts);
431 delta = ts4host(type_len_ts);
432
433 switch (type_len) {
434 case RINGBUF_TYPE_PADDING:
435 if (!delta)
436 die("error, hit unexpected end of page");
437 length = data2host4(perf_pevent, ptr);
438 ptr += 4;
439 length *= 4;
440 ptr += length;
441 goto read_again;
442
443 case RINGBUF_TYPE_TIME_EXTEND:
444 extend = data2host4(perf_pevent, ptr);
445 ptr += 4;
446 extend <<= TS_SHIFT;
447 extend += delta;
448 cpu_data[cpu].timestamp += extend;
449 goto read_again;
450
451 case RINGBUF_TYPE_TIME_STAMP:
452 ptr += 12;
453 break;
454 case 0:
455 length = data2host4(perf_pevent, ptr);
456 ptr += 4;
457 die("here! length=%d", length);
458 break;
459 default:
460 length = type_len * 4;
461 break;
462 }
463
464 cpu_data[cpu].timestamp += delta;
465
466 data = malloc_or_die(sizeof(*data));
467 memset(data, 0, sizeof(*data));
468
469 data->ts = cpu_data[cpu].timestamp;
470 data->size = length;
471 data->data = ptr;
472 ptr += length;
473
474 cpu_data[cpu].index = calc_index(ptr, cpu);
475 cpu_data[cpu].next = data;
476
477 return data;
478}
479
480struct pevent_record *trace_read_data(int cpu)
481{
482 struct pevent_record *data;
483
484 data = trace_peek_data(cpu);
485 cpu_data[cpu].next = NULL;
486
487 return data;
488}
489
490ssize_t trace_report(int fd, bool __repipe)
491{
492 char buf[BUFSIZ];
493 char test[] = { 23, 8, 68 };
494 char *version;
495 int show_version = 0;
496 int show_funcs = 0;
497 int show_printk = 0;
498 ssize_t size;
499
500 calc_data_size = 1;
501 repipe = __repipe;
502
503 input_fd = fd;
504
505 read_or_die(buf, 3);
506 if (memcmp(buf, test, 3) != 0)
507 die("no trace data in the file");
508
509 read_or_die(buf, 7);
510 if (memcmp(buf, "tracing", 7) != 0)
511 die("not a trace file (missing 'tracing' tag)");
512
513 version = read_string();
514 if (show_version)
515 printf("version = %s\n", version);
516 free(version);
517
518 read_or_die(buf, 1);
519 file_bigendian = buf[0];
520 host_bigendian = bigendian();
521
522 read_trace_init(file_bigendian, host_bigendian);
523
524 read_or_die(buf, 1);
525 long_size = buf[0];
526
527 page_size = read4();
528
529 read_header_files();
530
531 read_ftrace_files();
532 read_event_files();
533 read_proc_kallsyms();
534 read_ftrace_printk();
535
536 size = calc_data_size - 1;
537 calc_data_size = 0;
538 repipe = false;
539
540 if (show_funcs) {
541 pevent_print_funcs(perf_pevent);
542 return size;
543 }
544 if (show_printk) {
545 pevent_print_printk(perf_pevent);
546 return size;
547 }
548
549 return size;
550}