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/*
* 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 <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <ctype.h>
#include <errno.h>
#include "../perf.h"
#include "util.h"
#include "trace-event.h"
int header_page_size_size;
int header_page_ts_size;
int header_page_data_offset;
struct pevent *perf_pevent;
static struct pevent *pevent;
bool latency_format;
int read_trace_init(int file_bigendian, int host_bigendian)
{
if (pevent)
return 0;
perf_pevent = pevent_alloc();
pevent = perf_pevent;
pevent_set_flag(pevent, PEVENT_NSEC_OUTPUT);
pevent_set_file_bigendian(pevent, file_bigendian);
pevent_set_host_bigendian(pevent, host_bigendian);
return 0;
}
static int get_common_field(struct scripting_context *context,
int *offset, int *size, const char *type)
{
struct event_format *event;
struct format_field *field;
if (!*size) {
if (!pevent->events)
return 0;
event = pevent->events[0];
field = pevent_find_common_field(event, type);
if (!field)
return 0;
*offset = field->offset;
*size = field->size;
}
return pevent_read_number(pevent, context->event_data + *offset, *size);
}
int common_lock_depth(struct scripting_context *context)
{
static int offset;
static int size;
int ret;
ret = get_common_field(context, &size, &offset,
"common_lock_depth");
if (ret < 0)
return -1;
return ret;
}
int common_flags(struct scripting_context *context)
{
static int offset;
static int size;
int ret;
ret = get_common_field(context, &size, &offset,
"common_flags");
if (ret < 0)
return -1;
return ret;
}
int common_pc(struct scripting_context *context)
{
static int offset;
static int size;
int ret;
ret = get_common_field(context, &size, &offset,
"common_preempt_count");
if (ret < 0)
return -1;
return ret;
}
unsigned long long
raw_field_value(struct event_format *event, const char *name, void *data)
{
struct format_field *field;
unsigned long long val;
field = pevent_find_any_field(event, name);
if (!field)
return 0ULL;
pevent_read_number_field(field, data, &val);
return val;
}
void *raw_field_ptr(struct event_format *event, const char *name, void *data)
{
struct format_field *field;
field = pevent_find_any_field(event, name);
if (!field)
return NULL;
if (field->flags & FIELD_IS_DYNAMIC) {
int offset;
offset = *(int *)(data + field->offset);
offset &= 0xffff;
return data + offset;
}
return data + field->offset;
}
int trace_parse_common_type(void *data)
{
struct pevent_record record;
record.data = data;
return pevent_data_type(pevent, &record);
}
int trace_parse_common_pid(void *data)
{
struct pevent_record record;
record.data = data;
return pevent_data_pid(pevent, &record);
}
unsigned long long read_size(void *ptr, int size)
{
return pevent_read_number(pevent, ptr, size);
}
struct event_format *trace_find_event(int type)
{
return pevent_find_event(pevent, type);
}
void print_trace_event(int cpu, void *data, int size)
{
struct event_format *event;
struct pevent_record record;
struct trace_seq s;
int type;
type = trace_parse_common_type(data);
event = trace_find_event(type);
if (!event) {
warning("ug! no event found for type %d", type);
return;
}
memset(&record, 0, sizeof(record));
record.cpu = cpu;
record.size = size;
record.data = data;
trace_seq_init(&s);
pevent_event_info(&s, event, &record);
trace_seq_do_printf(&s);
}
void print_event(int cpu, void *data, int size, unsigned long long nsecs,
char *comm)
{
struct pevent_record record;
struct trace_seq s;
int pid;
pevent->latency_format = latency_format;
record.ts = nsecs;
record.cpu = cpu;
record.size = size;
record.data = data;
pid = pevent_data_pid(pevent, &record);
if (!pevent_pid_is_registered(pevent, pid))
pevent_register_comm(pevent, comm, pid);
trace_seq_init(&s);
pevent_print_event(pevent, &s, &record);
trace_seq_do_printf(&s);
printf("\n");
}
void parse_proc_kallsyms(char *file, unsigned int size __unused)
{
unsigned long long addr;
char *func;
char *line;
char *next = NULL;
char *addr_str;
char *mod;
char ch;
line = strtok_r(file, "\n", &next);
while (line) {
mod = NULL;
sscanf(line, "%as %c %as\t[%as",
(float *)(void *)&addr_str, /* workaround gcc warning */
&ch, (float *)(void *)&func, (float *)(void *)&mod);
addr = strtoull(addr_str, NULL, 16);
free(addr_str);
/* truncate the extra ']' */
if (mod)
mod[strlen(mod) - 1] = 0;
pevent_register_function(pevent, func, addr, mod);
free(func);
free(mod);
line = strtok_r(NULL, "\n", &next);
}
}
void parse_ftrace_printk(char *file, unsigned int size __unused)
{
unsigned long long addr;
char *printk;
char *line;
char *next = NULL;
char *addr_str;
char *fmt;
line = strtok_r(file, "\n", &next);
while (line) {
addr_str = strtok_r(line, ":", &fmt);
if (!addr_str) {
warning("printk format with empty entry");
break;
}
addr = strtoull(addr_str, NULL, 16);
/* fmt still has a space, skip it */
printk = strdup(fmt+1);
line = strtok_r(NULL, "\n", &next);
pevent_register_print_string(pevent, printk, addr);
}
}
int parse_ftrace_file(char *buf, unsigned long size)
{
return pevent_parse_event(pevent, buf, size, "ftrace");
}
int parse_event_file(char *buf, unsigned long size, char *sys)
{
return pevent_parse_event(pevent, buf, size, sys);
}
struct event_format *trace_find_next_event(struct event_format *event)
{
static int idx;
if (!pevent->events)
return NULL;
if (!event) {
idx = 0;
return pevent->events[0];
}
if (idx < pevent->nr_events && event == pevent->events[idx]) {
idx++;
if (idx == pevent->nr_events)
return NULL;
return pevent->events[idx];
}
for (idx = 1; idx < pevent->nr_events; idx++) {
if (event == pevent->events[idx - 1])
return pevent->events[idx];
}
return NULL;
}
struct flag {
const char *name;
unsigned long long value;
};
static const struct flag flags[] = {
{ "HI_SOFTIRQ", 0 },
{ "TIMER_SOFTIRQ", 1 },
{ "NET_TX_SOFTIRQ", 2 },
{ "NET_RX_SOFTIRQ", 3 },
{ "BLOCK_SOFTIRQ", 4 },
{ "BLOCK_IOPOLL_SOFTIRQ", 5 },
{ "TASKLET_SOFTIRQ", 6 },
{ "SCHED_SOFTIRQ", 7 },
{ "HRTIMER_SOFTIRQ", 8 },
{ "RCU_SOFTIRQ", 9 },
{ "HRTIMER_NORESTART", 0 },
{ "HRTIMER_RESTART", 1 },
};
unsigned long long eval_flag(const char *flag)
{
int i;
/*
* Some flags in the format files do not get converted.
* If the flag is not numeric, see if it is something that
* we already know about.
*/
if (isdigit(flag[0]))
return strtoull(flag, NULL, 0);
for (i = 0; i < (int)(sizeof(flags)/sizeof(flags[0])); i++)
if (strcmp(flags[i].name, flag) == 0)
return flags[i].value;
return 0;
}
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