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