2 * Copyright (C) 2009, Steven Rostedt <srostedt@redhat.com>
4 * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
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!)
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.
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
19 * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
27 #include <sys/types.h>
38 #include "trace-event.h"
42 static ssize_t trace_data_size;
45 static int __do_read(int fd, void *buf, int size)
50 int ret = read(fd, buf, size);
56 int retw = write(STDOUT_FILENO, buf, ret);
58 if (retw <= 0 || retw != ret) {
59 pr_debug("repiping input file");
71 static int do_read(void *data, int size)
75 r = __do_read(input_fd, data, size);
77 pr_debug("reading input file (size expected=%d received=%d)",
87 /* If it fails, the next read will report it */
88 static void skip(int size)
94 r = size > BUFSIZ ? BUFSIZ : size;
100 static unsigned int read4(struct pevent *pevent)
104 if (do_read(&data, 4) < 0)
106 return __data2host4(pevent, data);
109 static unsigned long long read8(struct pevent *pevent)
111 unsigned long long data;
113 if (do_read(&data, 8) < 0)
115 return __data2host8(pevent, data);
118 static char *read_string(void)
127 r = read(input_fd, &c, 1);
129 pr_debug("reading input file");
139 int retw = write(STDOUT_FILENO, &c, 1);
141 if (retw <= 0 || retw != r) {
142 pr_debug("repiping input file string");
153 trace_data_size += size;
157 memcpy(str, buf, size);
162 static int read_proc_kallsyms(struct pevent *pevent)
167 size = read4(pevent);
171 buf = malloc(size + 1);
175 if (do_read(buf, size) < 0) {
181 parse_proc_kallsyms(pevent, buf, size);
187 static int read_ftrace_printk(struct pevent *pevent)
192 /* it can have 0 size */
193 size = read4(pevent);
201 if (do_read(buf, size) < 0) {
206 parse_ftrace_printk(pevent, buf, size);
212 static int read_header_files(struct pevent *pevent)
214 unsigned long long size;
219 if (do_read(buf, 12) < 0)
222 if (memcmp(buf, "header_page", 12) != 0) {
223 pr_debug("did not read header page");
227 size = read8(pevent);
230 if (do_read(buf, 13) < 0)
233 if (memcmp(buf, "header_event", 13) != 0) {
234 pr_debug("did not read header event");
238 size = read8(pevent);
239 header_event = malloc(size);
240 if (header_event == NULL)
243 if (do_read(header_event, size) < 0)
250 static int read_ftrace_file(struct pevent *pevent, unsigned long long size)
258 if (do_read(buf, size) < 0) {
263 parse_ftrace_file(pevent, buf, size);
268 static int read_event_file(struct pevent *pevent, char *sys,
269 unsigned long long size)
277 if (do_read(buf, size) < 0) {
282 parse_event_file(pevent, buf, size, sys);
287 static int read_ftrace_files(struct pevent *pevent)
289 unsigned long long size;
294 count = read4(pevent);
296 for (i = 0; i < count; i++) {
297 size = read8(pevent);
298 ret = read_ftrace_file(pevent, size);
305 static int read_event_files(struct pevent *pevent)
307 unsigned long long size;
314 systems = read4(pevent);
316 for (i = 0; i < systems; i++) {
321 count = read4(pevent);
323 for (x=0; x < count; x++) {
324 size = read8(pevent);
325 ret = read_event_file(pevent, sys, size);
333 ssize_t trace_report(int fd, struct pevent **ppevent, bool __repipe)
336 char test[] = { 23, 8, 68 };
338 int show_version = 0;
346 struct pevent *pevent;
354 if (do_read(buf, 3) < 0)
356 if (memcmp(buf, test, 3) != 0) {
357 pr_debug("no trace data in the file");
361 if (do_read(buf, 7) < 0)
363 if (memcmp(buf, "tracing", 7) != 0) {
364 pr_debug("not a trace file (missing 'tracing' tag)");
368 version = read_string();
372 printf("version = %s\n", version);
375 if (do_read(buf, 1) < 0)
377 file_bigendian = buf[0];
378 host_bigendian = bigendian();
380 pevent = read_trace_init(file_bigendian, host_bigendian);
381 if (pevent == NULL) {
382 pr_debug("read_trace_init failed");
386 if (do_read(buf, 1) < 0)
388 file_long_size = buf[0];
390 file_page_size = read4(pevent);
394 pevent_set_long_size(pevent, file_long_size);
395 pevent_set_page_size(pevent, file_page_size);
397 err = read_header_files(pevent);
400 err = read_ftrace_files(pevent);
403 err = read_event_files(pevent);
406 err = read_proc_kallsyms(pevent);
409 err = read_ftrace_printk(pevent);
413 size = trace_data_size;
417 pevent_print_funcs(pevent);
418 } else if (show_printk) {
419 pevent_print_printk(pevent);