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"
45 static ssize_t trace_data_size;
48 static int __do_read(int fd, void *buf, int size)
53 int ret = read(fd, buf, size);
59 int retw = write(STDOUT_FILENO, buf, ret);
61 if (retw <= 0 || retw != ret) {
62 pr_debug("repiping input file");
74 static int do_read(void *data, int size)
78 r = __do_read(input_fd, data, size);
80 pr_debug("reading input file (size expected=%d received=%d)",
90 /* If it fails, the next read will report it */
91 static void skip(int size)
97 r = size > BUFSIZ ? BUFSIZ : size;
103 static unsigned int read4(struct pevent *pevent)
107 if (do_read(&data, 4) < 0)
109 return __data2host4(pevent, data);
112 static unsigned long long read8(struct pevent *pevent)
114 unsigned long long data;
116 if (do_read(&data, 8) < 0)
118 return __data2host8(pevent, data);
121 static char *read_string(void)
130 r = read(input_fd, &c, 1);
132 pr_debug("reading input file");
142 int retw = write(STDOUT_FILENO, &c, 1);
144 if (retw <= 0 || retw != r) {
145 pr_debug("repiping input file string");
156 trace_data_size += size;
160 memcpy(str, buf, size);
165 static int read_proc_kallsyms(struct pevent *pevent)
170 size = read4(pevent);
174 buf = malloc(size + 1);
178 if (do_read(buf, size) < 0) {
184 parse_proc_kallsyms(pevent, buf, size);
190 static int read_ftrace_printk(struct pevent *pevent)
195 /* it can have 0 size */
196 size = read4(pevent);
204 if (do_read(buf, size) < 0) {
209 parse_ftrace_printk(pevent, buf, size);
215 static int read_header_files(struct pevent *pevent)
217 unsigned long long size;
222 if (do_read(buf, 12) < 0)
225 if (memcmp(buf, "header_page", 12) != 0) {
226 pr_debug("did not read header page");
230 size = read8(pevent);
233 if (do_read(buf, 13) < 0)
236 if (memcmp(buf, "header_event", 13) != 0) {
237 pr_debug("did not read header event");
241 size = read8(pevent);
242 header_event = malloc(size);
243 if (header_event == NULL)
246 if (do_read(header_event, size) < 0)
253 static int read_ftrace_file(struct pevent *pevent, unsigned long long size)
261 if (do_read(buf, size) < 0) {
266 parse_ftrace_file(pevent, buf, size);
271 static int read_event_file(struct pevent *pevent, char *sys,
272 unsigned long long size)
280 if (do_read(buf, size) < 0) {
285 parse_event_file(pevent, buf, size, sys);
290 static int read_ftrace_files(struct pevent *pevent)
292 unsigned long long size;
297 count = read4(pevent);
299 for (i = 0; i < count; i++) {
300 size = read8(pevent);
301 ret = read_ftrace_file(pevent, size);
308 static int read_event_files(struct pevent *pevent)
310 unsigned long long size;
317 systems = read4(pevent);
319 for (i = 0; i < systems; i++) {
324 count = read4(pevent);
326 for (x=0; x < count; x++) {
327 size = read8(pevent);
328 ret = read_event_file(pevent, sys, size);
336 ssize_t trace_report(int fd, struct pevent **ppevent, bool __repipe)
339 char test[] = { 23, 8, 68 };
341 int show_version = 0;
347 struct pevent *pevent;
355 if (do_read(buf, 3) < 0)
357 if (memcmp(buf, test, 3) != 0) {
358 pr_debug("no trace data in the file");
362 if (do_read(buf, 7) < 0)
364 if (memcmp(buf, "tracing", 7) != 0) {
365 pr_debug("not a trace file (missing 'tracing' tag)");
369 version = read_string();
373 printf("version = %s\n", version);
376 if (do_read(buf, 1) < 0)
378 file_bigendian = buf[0];
379 host_bigendian = bigendian();
381 pevent = read_trace_init(file_bigendian, host_bigendian);
382 if (pevent == NULL) {
383 pr_debug("read_trace_init failed");
387 if (do_read(buf, 1) < 0)
389 file_long_size = buf[0];
391 file_page_size = read4(pevent);
395 pevent_set_long_size(pevent, file_long_size);
396 pevent_set_page_size(pevent, file_page_size);
398 err = read_header_files(pevent);
401 err = read_ftrace_files(pevent);
404 err = read_event_files(pevent);
407 err = read_proc_kallsyms(pevent);
410 err = read_ftrace_printk(pevent);
414 size = trace_data_size;
418 pevent_print_funcs(pevent);
419 } else if (show_printk) {
420 pevent_print_printk(pevent);