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 * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
26 #include <sys/types.h>
37 #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
)
166 size
= read4(pevent
);
170 * Just skip it, now that we configure libtraceevent to use the
171 * tools/perf/ symbol resolver.
173 * We need to skip it so that we can continue parsing old perf.data
174 * files, that contains this /proc/kallsyms payload.
176 * Newer perf.data files will have just the 4-bytes zeros "kallsyms
177 * payload", so that older tools can continue reading it and interpret
178 * it as "no kallsyms payload is present".
180 lseek(input_fd
, size
, SEEK_CUR
);
181 trace_data_size
+= size
;
185 static int read_ftrace_printk(struct pevent
*pevent
)
190 /* it can have 0 size */
191 size
= read4(pevent
);
199 if (do_read(buf
, size
) < 0) {
204 parse_ftrace_printk(pevent
, buf
, size
);
210 static int read_header_files(struct pevent
*pevent
)
212 unsigned long long size
;
217 if (do_read(buf
, 12) < 0)
220 if (memcmp(buf
, "header_page", 12) != 0) {
221 pr_debug("did not read header page");
225 size
= read8(pevent
);
227 header_page
= malloc(size
);
228 if (header_page
== NULL
)
231 if (do_read(header_page
, size
) < 0) {
232 pr_debug("did not read header page");
237 if (!pevent_parse_header_page(pevent
, header_page
, size
,
238 pevent_get_long_size(pevent
))) {
240 * The commit field in the page is of type long,
241 * use that instead, since it represents the kernel.
243 pevent_set_long_size(pevent
, pevent
->header_page_size_size
);
247 if (do_read(buf
, 13) < 0)
250 if (memcmp(buf
, "header_event", 13) != 0) {
251 pr_debug("did not read header event");
255 size
= read8(pevent
);
261 static int read_ftrace_file(struct pevent
*pevent
, unsigned long long size
)
269 if (do_read(buf
, size
) < 0) {
274 parse_ftrace_file(pevent
, buf
, size
);
279 static int read_event_file(struct pevent
*pevent
, char *sys
,
280 unsigned long long size
)
288 if (do_read(buf
, size
) < 0) {
293 parse_event_file(pevent
, buf
, size
, sys
);
298 static int read_ftrace_files(struct pevent
*pevent
)
300 unsigned long long size
;
305 count
= read4(pevent
);
307 for (i
= 0; i
< count
; i
++) {
308 size
= read8(pevent
);
309 ret
= read_ftrace_file(pevent
, size
);
316 static int read_event_files(struct pevent
*pevent
)
318 unsigned long long size
;
325 systems
= read4(pevent
);
327 for (i
= 0; i
< systems
; i
++) {
332 count
= read4(pevent
);
334 for (x
=0; x
< count
; x
++) {
335 size
= read8(pevent
);
336 ret
= read_event_file(pevent
, sys
, size
);
344 ssize_t
trace_report(int fd
, struct trace_event
*tevent
, bool __repipe
)
347 char test
[] = { 23, 8, 68 };
349 int show_version
= 0;
357 struct pevent
*pevent
= NULL
;
363 if (do_read(buf
, 3) < 0)
365 if (memcmp(buf
, test
, 3) != 0) {
366 pr_debug("no trace data in the file");
370 if (do_read(buf
, 7) < 0)
372 if (memcmp(buf
, "tracing", 7) != 0) {
373 pr_debug("not a trace file (missing 'tracing' tag)");
377 version
= read_string();
381 printf("version = %s\n", version
);
384 if (do_read(buf
, 1) < 0)
386 file_bigendian
= buf
[0];
387 host_bigendian
= bigendian();
389 if (trace_event__init(tevent
)) {
390 pr_debug("trace_event__init failed");
394 pevent
= tevent
->pevent
;
396 pevent_set_flag(pevent
, PEVENT_NSEC_OUTPUT
);
397 pevent_set_file_bigendian(pevent
, file_bigendian
);
398 pevent_set_host_bigendian(pevent
, host_bigendian
);
400 if (do_read(buf
, 1) < 0)
402 file_long_size
= buf
[0];
404 file_page_size
= read4(pevent
);
408 pevent_set_long_size(pevent
, file_long_size
);
409 pevent_set_page_size(pevent
, file_page_size
);
411 err
= read_header_files(pevent
);
414 err
= read_ftrace_files(pevent
);
417 err
= read_event_files(pevent
);
420 err
= read_proc_kallsyms(pevent
);
423 err
= read_ftrace_printk(pevent
);
427 size
= trace_data_size
;
431 pevent_print_funcs(pevent
);
432 } else if (show_printk
) {
433 pevent_print_printk(pevent
);
440 trace_event__cleanup(tevent
);
This page took 0.044298 seconds and 5 git commands to generate.