479 lines
8.1 KiB
C
479 lines
8.1 KiB
C
// SPDX-License-Identifier: GPL-2.0-only
|
|
/*
|
|
* Copyright (C) 2009, Steven Rostedt <srostedt@redhat.com>
|
|
*/
|
|
#include <dirent.h>
|
|
#include <stdio.h>
|
|
#include <stdlib.h>
|
|
#include <string.h>
|
|
#include <stdarg.h>
|
|
#include <sys/types.h>
|
|
#include <sys/stat.h>
|
|
#include <sys/wait.h>
|
|
#include <sys/mman.h>
|
|
#include <fcntl.h>
|
|
#include <unistd.h>
|
|
#include <errno.h>
|
|
|
|
#include "trace-event.h"
|
|
#include "debug.h"
|
|
|
|
static int input_fd;
|
|
|
|
static ssize_t trace_data_size;
|
|
static bool repipe;
|
|
|
|
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) {
|
|
pr_debug("repiping input file");
|
|
return -1;
|
|
}
|
|
}
|
|
|
|
size -= ret;
|
|
buf += ret;
|
|
}
|
|
|
|
return rsize;
|
|
}
|
|
|
|
static int do_read(void *data, int size)
|
|
{
|
|
int r;
|
|
|
|
r = __do_read(input_fd, data, size);
|
|
if (r <= 0) {
|
|
pr_debug("reading input file (size expected=%d received=%d)",
|
|
size, r);
|
|
return -1;
|
|
}
|
|
|
|
trace_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;
|
|
do_read(buf, r);
|
|
size -= r;
|
|
}
|
|
}
|
|
|
|
static unsigned int read4(struct tep_handle *pevent)
|
|
{
|
|
unsigned int data;
|
|
|
|
if (do_read(&data, 4) < 0)
|
|
return 0;
|
|
return tep_read_number(pevent, &data, 4);
|
|
}
|
|
|
|
static unsigned long long read8(struct tep_handle *pevent)
|
|
{
|
|
unsigned long long data;
|
|
|
|
if (do_read(&data, 8) < 0)
|
|
return 0;
|
|
return tep_read_number(pevent, &data, 8);
|
|
}
|
|
|
|
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) {
|
|
pr_debug("reading input file");
|
|
goto out;
|
|
}
|
|
|
|
if (!r) {
|
|
pr_debug("no data");
|
|
goto out;
|
|
}
|
|
|
|
if (repipe) {
|
|
int retw = write(STDOUT_FILENO, &c, 1);
|
|
|
|
if (retw <= 0 || retw != r) {
|
|
pr_debug("repiping input file string");
|
|
goto out;
|
|
}
|
|
}
|
|
|
|
buf[size++] = c;
|
|
|
|
if (!c)
|
|
break;
|
|
}
|
|
|
|
trace_data_size += size;
|
|
|
|
str = malloc(size);
|
|
if (str)
|
|
memcpy(str, buf, size);
|
|
out:
|
|
return str;
|
|
}
|
|
|
|
static int read_proc_kallsyms(struct tep_handle *pevent)
|
|
{
|
|
unsigned int size;
|
|
|
|
size = read4(pevent);
|
|
if (!size)
|
|
return 0;
|
|
/*
|
|
* Just skip it, now that we configure libtraceevent to use the
|
|
* tools/perf/ symbol resolver.
|
|
*
|
|
* We need to skip it so that we can continue parsing old perf.data
|
|
* files, that contains this /proc/kallsyms payload.
|
|
*
|
|
* Newer perf.data files will have just the 4-bytes zeros "kallsyms
|
|
* payload", so that older tools can continue reading it and interpret
|
|
* it as "no kallsyms payload is present".
|
|
*/
|
|
lseek(input_fd, size, SEEK_CUR);
|
|
trace_data_size += size;
|
|
return 0;
|
|
}
|
|
|
|
static int read_ftrace_printk(struct tep_handle *pevent)
|
|
{
|
|
unsigned int size;
|
|
char *buf;
|
|
|
|
/* it can have 0 size */
|
|
size = read4(pevent);
|
|
if (!size)
|
|
return 0;
|
|
|
|
buf = malloc(size + 1);
|
|
if (buf == NULL)
|
|
return -1;
|
|
|
|
if (do_read(buf, size) < 0) {
|
|
free(buf);
|
|
return -1;
|
|
}
|
|
|
|
buf[size] = '\0';
|
|
|
|
parse_ftrace_printk(pevent, buf, size);
|
|
|
|
free(buf);
|
|
return 0;
|
|
}
|
|
|
|
static int read_header_files(struct tep_handle *pevent)
|
|
{
|
|
unsigned long long size;
|
|
char *header_page;
|
|
char buf[BUFSIZ];
|
|
int ret = 0;
|
|
|
|
if (do_read(buf, 12) < 0)
|
|
return -1;
|
|
|
|
if (memcmp(buf, "header_page", 12) != 0) {
|
|
pr_debug("did not read header page");
|
|
return -1;
|
|
}
|
|
|
|
size = read8(pevent);
|
|
|
|
header_page = malloc(size);
|
|
if (header_page == NULL)
|
|
return -1;
|
|
|
|
if (do_read(header_page, size) < 0) {
|
|
pr_debug("did not read header page");
|
|
free(header_page);
|
|
return -1;
|
|
}
|
|
|
|
if (!tep_parse_header_page(pevent, header_page, size,
|
|
tep_get_long_size(pevent))) {
|
|
/*
|
|
* The commit field in the page is of type long,
|
|
* use that instead, since it represents the kernel.
|
|
*/
|
|
tep_set_long_size(pevent, tep_get_header_page_size(pevent));
|
|
}
|
|
free(header_page);
|
|
|
|
if (do_read(buf, 13) < 0)
|
|
return -1;
|
|
|
|
if (memcmp(buf, "header_event", 13) != 0) {
|
|
pr_debug("did not read header event");
|
|
return -1;
|
|
}
|
|
|
|
size = read8(pevent);
|
|
skip(size);
|
|
|
|
return ret;
|
|
}
|
|
|
|
static int read_ftrace_file(struct tep_handle *pevent, unsigned long long size)
|
|
{
|
|
int ret;
|
|
char *buf;
|
|
|
|
buf = malloc(size);
|
|
if (buf == NULL) {
|
|
pr_debug("memory allocation failure\n");
|
|
return -1;
|
|
}
|
|
|
|
ret = do_read(buf, size);
|
|
if (ret < 0) {
|
|
pr_debug("error reading ftrace file.\n");
|
|
goto out;
|
|
}
|
|
|
|
ret = parse_ftrace_file(pevent, buf, size);
|
|
if (ret < 0)
|
|
pr_debug("error parsing ftrace file.\n");
|
|
out:
|
|
free(buf);
|
|
return ret;
|
|
}
|
|
|
|
static int read_event_file(struct tep_handle *pevent, char *sys,
|
|
unsigned long long size)
|
|
{
|
|
int ret;
|
|
char *buf;
|
|
|
|
buf = malloc(size);
|
|
if (buf == NULL) {
|
|
pr_debug("memory allocation failure\n");
|
|
return -1;
|
|
}
|
|
|
|
ret = do_read(buf, size);
|
|
if (ret < 0)
|
|
goto out;
|
|
|
|
ret = parse_event_file(pevent, buf, size, sys);
|
|
if (ret < 0)
|
|
pr_debug("error parsing event file.\n");
|
|
out:
|
|
free(buf);
|
|
return ret;
|
|
}
|
|
|
|
static int read_ftrace_files(struct tep_handle *pevent)
|
|
{
|
|
unsigned long long size;
|
|
int count;
|
|
int i;
|
|
int ret;
|
|
|
|
count = read4(pevent);
|
|
|
|
for (i = 0; i < count; i++) {
|
|
size = read8(pevent);
|
|
ret = read_ftrace_file(pevent, size);
|
|
if (ret)
|
|
return ret;
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
static int read_event_files(struct tep_handle *pevent)
|
|
{
|
|
unsigned long long size;
|
|
char *sys;
|
|
int systems;
|
|
int count;
|
|
int i,x;
|
|
int ret;
|
|
|
|
systems = read4(pevent);
|
|
|
|
for (i = 0; i < systems; i++) {
|
|
sys = read_string();
|
|
if (sys == NULL)
|
|
return -1;
|
|
|
|
count = read4(pevent);
|
|
|
|
for (x=0; x < count; x++) {
|
|
size = read8(pevent);
|
|
ret = read_event_file(pevent, sys, size);
|
|
if (ret) {
|
|
free(sys);
|
|
return ret;
|
|
}
|
|
}
|
|
free(sys);
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
static int read_saved_cmdline(struct tep_handle *pevent)
|
|
{
|
|
unsigned long long size;
|
|
char *buf;
|
|
int ret;
|
|
|
|
/* it can have 0 size */
|
|
size = read8(pevent);
|
|
if (!size)
|
|
return 0;
|
|
|
|
buf = malloc(size + 1);
|
|
if (buf == NULL) {
|
|
pr_debug("memory allocation failure\n");
|
|
return -1;
|
|
}
|
|
|
|
ret = do_read(buf, size);
|
|
if (ret < 0) {
|
|
pr_debug("error reading saved cmdlines\n");
|
|
goto out;
|
|
}
|
|
buf[ret] = '\0';
|
|
|
|
parse_saved_cmdline(pevent, buf, size);
|
|
ret = 0;
|
|
out:
|
|
free(buf);
|
|
return ret;
|
|
}
|
|
|
|
ssize_t trace_report(int fd, struct trace_event *tevent, 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 = -1;
|
|
int file_bigendian;
|
|
int host_bigendian;
|
|
int file_long_size;
|
|
int file_page_size;
|
|
struct tep_handle *pevent = NULL;
|
|
int err;
|
|
|
|
repipe = __repipe;
|
|
input_fd = fd;
|
|
|
|
if (do_read(buf, 3) < 0)
|
|
return -1;
|
|
if (memcmp(buf, test, 3) != 0) {
|
|
pr_debug("no trace data in the file");
|
|
return -1;
|
|
}
|
|
|
|
if (do_read(buf, 7) < 0)
|
|
return -1;
|
|
if (memcmp(buf, "tracing", 7) != 0) {
|
|
pr_debug("not a trace file (missing 'tracing' tag)");
|
|
return -1;
|
|
}
|
|
|
|
version = read_string();
|
|
if (version == NULL)
|
|
return -1;
|
|
if (show_version)
|
|
printf("version = %s\n", version);
|
|
|
|
if (do_read(buf, 1) < 0) {
|
|
free(version);
|
|
return -1;
|
|
}
|
|
file_bigendian = buf[0];
|
|
host_bigendian = bigendian();
|
|
|
|
if (trace_event__init(tevent)) {
|
|
pr_debug("trace_event__init failed");
|
|
goto out;
|
|
}
|
|
|
|
pevent = tevent->pevent;
|
|
|
|
tep_set_flag(pevent, TEP_NSEC_OUTPUT);
|
|
tep_set_file_bigendian(pevent, file_bigendian);
|
|
tep_set_local_bigendian(pevent, host_bigendian);
|
|
|
|
if (do_read(buf, 1) < 0)
|
|
goto out;
|
|
file_long_size = buf[0];
|
|
|
|
file_page_size = read4(pevent);
|
|
if (!file_page_size)
|
|
goto out;
|
|
|
|
tep_set_long_size(pevent, file_long_size);
|
|
tep_set_page_size(pevent, file_page_size);
|
|
|
|
err = read_header_files(pevent);
|
|
if (err)
|
|
goto out;
|
|
err = read_ftrace_files(pevent);
|
|
if (err)
|
|
goto out;
|
|
err = read_event_files(pevent);
|
|
if (err)
|
|
goto out;
|
|
err = read_proc_kallsyms(pevent);
|
|
if (err)
|
|
goto out;
|
|
err = read_ftrace_printk(pevent);
|
|
if (err)
|
|
goto out;
|
|
if (atof(version) >= 0.6) {
|
|
err = read_saved_cmdline(pevent);
|
|
if (err)
|
|
goto out;
|
|
}
|
|
|
|
size = trace_data_size;
|
|
repipe = false;
|
|
|
|
if (show_funcs) {
|
|
tep_print_funcs(pevent);
|
|
} else if (show_printk) {
|
|
tep_print_printk(pevent);
|
|
}
|
|
|
|
pevent = NULL;
|
|
|
|
out:
|
|
if (pevent)
|
|
trace_event__cleanup(tevent);
|
|
free(version);
|
|
return size;
|
|
}
|