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// SPDX-License-Identifier: GPL-2.0-only
/*
* Copyright (C) 2009, Steven Rostedt <srostedt@redhat.com>
*/
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <errno.h>
#include "debug.h"
#include "trace-event.h"
#include <linux/ctype.h>
static int get_common_field(struct scripting_context *context,
int *offset, int *size, const char *type)
{
struct tep_handle *pevent = context->pevent;
struct tep_event *event;
struct tep_format_field *field;
if (!*size) {
event = tep_get_first_event(pevent);
if (!event)
return 0;
field = tep_find_common_field(event, type);
if (!field)
return 0;
*offset = field->offset;
*size = field->size;
}
return tep_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 tep_event *event, const char *name, void *data)
{
struct tep_format_field *field;
unsigned long long val;
field = tep_find_any_field(event, name);
if (!field)
return 0ULL;
tep_read_number_field(field, data, &val);
return val;
}
unsigned long long read_size(struct tep_event *event, void *ptr, int size)
{
return tep_read_number(event->tep, ptr, size);
}
void event_format__fprintf(struct tep_event *event,
int cpu, void *data, int size, FILE *fp)
{
struct tep_record record;
struct trace_seq s;
memset(&record, 0, sizeof(record));
record.cpu = cpu;
record.size = size;
record.data = data;
trace_seq_init(&s);
tep_print_event(event->tep, &s, &record, "%s", TEP_PRINT_INFO);
trace_seq_do_fprintf(&s, fp);
trace_seq_destroy(&s);
}
void event_format__print(struct tep_event *event,
int cpu, void *data, int size)
{
return event_format__fprintf(event, cpu, data, size, stdout);
}
void parse_ftrace_printk(struct tep_handle *pevent,
char *file, unsigned int size __maybe_unused)
{
unsigned long long addr;
char *printk;
char *line;
char *next = NULL;
char *addr_str;
char *fmt = NULL;
line = strtok_r(file, "\n", &next);
while (line) {
addr_str = strtok_r(line, ":", &fmt);
if (!addr_str) {
pr_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);
tep_register_print_string(pevent, printk, addr);
free(printk);
}
}
void parse_saved_cmdline(struct tep_handle *pevent,
char *file, unsigned int size __maybe_unused)
{
char comm[17]; /* Max comm length in the kernel is 16. */
char *line;
char *next = NULL;
int pid;
line = strtok_r(file, "\n", &next);
while (line) {
if (sscanf(line, "%d %16s", &pid, comm) == 2)
tep_register_comm(pevent, comm, pid);
line = strtok_r(NULL, "\n", &next);
}
}
int parse_ftrace_file(struct tep_handle *pevent, char *buf, unsigned long size)
{
return tep_parse_event(pevent, buf, size, "ftrace");
}
int parse_event_file(struct tep_handle *pevent,
char *buf, unsigned long size, char *sys)
{
return tep_parse_event(pevent, buf, size, sys);
}
struct tep_event *trace_find_next_event(struct tep_handle *pevent,
struct tep_event *event)
{
static int idx;
int events_count;
struct tep_event *all_events;
all_events = tep_get_first_event(pevent);
events_count = tep_get_events_count(pevent);
if (!pevent || !all_events || events_count < 1)
return NULL;
if (!event) {
idx = 0;
return all_events;
}
if (idx < events_count && event == (all_events + idx)) {
idx++;
if (idx == events_count)
return NULL;
return (all_events + idx);
}
for (idx = 1; idx < events_count; idx++) {
if (event == (all_events + (idx - 1)))
return (all_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 },
{ "IRQ_POLL_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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