forked from Minki/linux
f3ff40ec8d
And functions that called only from the trace_read_data(). Signed-off-by: Namhyung Kim <namhyung@kernel.org> Cc: David Ahern <dsahern@gmail.com> Cc: Frederic Weisbecker <fweisbec@gmail.com> Cc: Ingo Molnar <mingo@kernel.org> Cc: Paul Mackerras <paulus@samba.org> Cc: Peter Zijlstra <a.p.zijlstra@chello.nl> Cc: Steven Rostedt <rostedt@goodmis.org> Link: http://lkml.kernel.org/r/1363173585-9754-2-git-send-email-namhyung@kernel.org Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
351 lines
6.3 KiB
C
351 lines
6.3 KiB
C
/*
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* Copyright (C) 2009, Steven Rostedt <srostedt@redhat.com>
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*
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* ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; version 2 of the License (not later!)
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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*
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* ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
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*/
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#define _FILE_OFFSET_BITS 64
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#include <dirent.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <getopt.h>
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#include <stdarg.h>
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#include <sys/types.h>
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#include <sys/stat.h>
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#include <sys/wait.h>
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#include <sys/mman.h>
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#include <pthread.h>
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#include <fcntl.h>
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#include <unistd.h>
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#include <errno.h>
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#include "../perf.h"
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#include "util.h"
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#include "trace-event.h"
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static int input_fd;
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int file_bigendian;
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int host_bigendian;
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static int long_size;
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static ssize_t calc_data_size;
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static bool repipe;
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static void *malloc_or_die(int size)
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{
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void *ret;
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ret = malloc(size);
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if (!ret)
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die("malloc");
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return ret;
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}
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static int do_read(int fd, void *buf, int size)
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{
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int rsize = size;
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while (size) {
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int ret = read(fd, buf, size);
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if (ret <= 0)
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return -1;
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if (repipe) {
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int retw = write(STDOUT_FILENO, buf, ret);
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if (retw <= 0 || retw != ret)
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die("repiping input file");
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}
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size -= ret;
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buf += ret;
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}
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return rsize;
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}
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static int read_or_die(void *data, int size)
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{
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int r;
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r = do_read(input_fd, data, size);
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if (r <= 0)
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die("reading input file (size expected=%d received=%d)",
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size, r);
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if (calc_data_size)
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calc_data_size += r;
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return r;
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}
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/* If it fails, the next read will report it */
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static void skip(int size)
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{
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char buf[BUFSIZ];
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int r;
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while (size) {
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r = size > BUFSIZ ? BUFSIZ : size;
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read_or_die(buf, r);
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size -= r;
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};
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}
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static unsigned int read4(struct pevent *pevent)
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{
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unsigned int data;
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read_or_die(&data, 4);
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return __data2host4(pevent, data);
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}
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static unsigned long long read8(struct pevent *pevent)
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{
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unsigned long long data;
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read_or_die(&data, 8);
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return __data2host8(pevent, data);
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}
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static char *read_string(void)
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{
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char buf[BUFSIZ];
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char *str = NULL;
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int size = 0;
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off_t r;
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char c;
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for (;;) {
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r = read(input_fd, &c, 1);
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if (r < 0)
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die("reading input file");
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if (!r)
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die("no data");
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if (repipe) {
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int retw = write(STDOUT_FILENO, &c, 1);
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if (retw <= 0 || retw != r)
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die("repiping input file string");
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}
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buf[size++] = c;
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if (!c)
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break;
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}
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if (calc_data_size)
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calc_data_size += size;
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str = malloc_or_die(size);
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memcpy(str, buf, size);
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return str;
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}
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static void read_proc_kallsyms(struct pevent *pevent)
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{
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unsigned int size;
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char *buf;
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size = read4(pevent);
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if (!size)
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return;
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buf = malloc_or_die(size + 1);
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read_or_die(buf, size);
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buf[size] = '\0';
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parse_proc_kallsyms(pevent, buf, size);
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free(buf);
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}
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static void read_ftrace_printk(struct pevent *pevent)
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{
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unsigned int size;
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char *buf;
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size = read4(pevent);
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if (!size)
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return;
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buf = malloc_or_die(size);
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read_or_die(buf, size);
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parse_ftrace_printk(pevent, buf, size);
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free(buf);
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}
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static void read_header_files(struct pevent *pevent)
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{
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unsigned long long size;
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char *header_event;
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char buf[BUFSIZ];
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read_or_die(buf, 12);
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if (memcmp(buf, "header_page", 12) != 0)
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die("did not read header page");
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size = read8(pevent);
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skip(size);
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/*
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* The size field in the page is of type long,
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* use that instead, since it represents the kernel.
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*/
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long_size = header_page_size_size;
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read_or_die(buf, 13);
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if (memcmp(buf, "header_event", 13) != 0)
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die("did not read header event");
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size = read8(pevent);
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header_event = malloc_or_die(size);
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read_or_die(header_event, size);
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free(header_event);
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}
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static void read_ftrace_file(struct pevent *pevent, unsigned long long size)
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{
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char *buf;
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buf = malloc_or_die(size);
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read_or_die(buf, size);
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parse_ftrace_file(pevent, buf, size);
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free(buf);
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}
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static void read_event_file(struct pevent *pevent, char *sys,
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unsigned long long size)
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{
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char *buf;
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buf = malloc_or_die(size);
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read_or_die(buf, size);
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parse_event_file(pevent, buf, size, sys);
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free(buf);
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}
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static void read_ftrace_files(struct pevent *pevent)
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{
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unsigned long long size;
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int count;
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int i;
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count = read4(pevent);
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for (i = 0; i < count; i++) {
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size = read8(pevent);
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read_ftrace_file(pevent, size);
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}
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}
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static void read_event_files(struct pevent *pevent)
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{
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unsigned long long size;
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char *sys;
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int systems;
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int count;
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int i,x;
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systems = read4(pevent);
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for (i = 0; i < systems; i++) {
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sys = read_string();
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count = read4(pevent);
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for (x=0; x < count; x++) {
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size = read8(pevent);
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read_event_file(pevent, sys, size);
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}
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}
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}
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ssize_t trace_report(int fd, struct pevent **ppevent, bool __repipe)
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{
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char buf[BUFSIZ];
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char test[] = { 23, 8, 68 };
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char *version;
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int show_version = 0;
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int show_funcs = 0;
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int show_printk = 0;
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ssize_t size;
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calc_data_size = 1;
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repipe = __repipe;
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input_fd = fd;
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read_or_die(buf, 3);
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if (memcmp(buf, test, 3) != 0)
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die("no trace data in the file");
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read_or_die(buf, 7);
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if (memcmp(buf, "tracing", 7) != 0)
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die("not a trace file (missing 'tracing' tag)");
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version = read_string();
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if (show_version)
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printf("version = %s\n", version);
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free(version);
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read_or_die(buf, 1);
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file_bigendian = buf[0];
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host_bigendian = bigendian();
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*ppevent = read_trace_init(file_bigendian, host_bigendian);
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if (*ppevent == NULL)
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die("read_trace_init failed");
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read_or_die(buf, 1);
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long_size = buf[0];
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page_size = read4(*ppevent);
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read_header_files(*ppevent);
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read_ftrace_files(*ppevent);
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read_event_files(*ppevent);
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read_proc_kallsyms(*ppevent);
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read_ftrace_printk(*ppevent);
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size = calc_data_size - 1;
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calc_data_size = 0;
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repipe = false;
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if (show_funcs) {
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pevent_print_funcs(*ppevent);
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return size;
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}
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if (show_printk) {
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pevent_print_printk(*ppevent);
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return size;
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}
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return size;
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}
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