124 lines
3.8 KiB
C
124 lines
3.8 KiB
C
|
// SPDX-License-Identifier: LGPL-2.1
|
||
|
|
/*
|
||
|
|
* Copyright (C) 2017 National Instruments Corp.
|
||
|
|
*
|
||
|
|
* Author: Julia Cartwright <julia@ni.com>
|
||
|
|
*
|
||
|
|
*/
|
||
|
|
#include <stdio.h>
|
||
|
|
#include <stdlib.h>
|
||
|
|
#include <string.h>
|
||
|
|
#include <linux/futex.h>
|
||
|
|
|
||
|
|
#include "event-parse.h"
|
||
|
|
|
||
|
|
#define ARRAY_SIZE(_a) (sizeof(_a) / sizeof((_a)[0]))
|
||
|
|
|
||
|
|
struct futex_args {
|
||
|
|
unsigned long long uaddr;
|
||
|
|
unsigned long long op;
|
||
|
|
unsigned long long val;
|
||
|
|
unsigned long long utime; /* or val2 */
|
||
|
|
unsigned long long uaddr2;
|
||
|
|
unsigned long long val3;
|
||
|
|
};
|
||
|
|
|
||
|
|
struct futex_op {
|
||
|
|
const char *name;
|
||
|
|
const char *fmt_val;
|
||
|
|
const char *fmt_utime;
|
||
|
|
const char *fmt_uaddr2;
|
||
|
|
const char *fmt_val3;
|
||
|
|
};
|
||
|
|
|
||
|
|
static const struct futex_op futex_op_tbl[] = {
|
||
|
|
{ "FUTEX_WAIT", " val=0x%08llx", " utime=0x%08llx", NULL, NULL },
|
||
|
|
{ "FUTEX_WAKE", " val=%llu", NULL, NULL, NULL },
|
||
|
|
{ "FUTEX_FD", " val=%llu", NULL, NULL, NULL },
|
||
|
|
{ "FUTEX_REQUEUE", " val=%llu", " val2=%llu", " uaddr2=0x%08llx", NULL },
|
||
|
|
{ "FUTEX_CMP_REQUEUE", " val=%llu", " val2=%llu", " uaddr2=0x%08llx", " val3=0x%08llx" },
|
||
|
|
{ "FUTEX_WAKE_OP", " val=%llu", " val2=%llu", " uaddr2=0x%08llx", " val3=0x%08llx" },
|
||
|
|
{ "FUTEX_LOCK_PI", NULL, " utime=0x%08llx", NULL, NULL },
|
||
|
|
{ "FUTEX_UNLOCK_PI", NULL, NULL, NULL, NULL },
|
||
|
|
{ "FUTEX_TRYLOCK_PI", NULL, NULL, NULL, NULL },
|
||
|
|
{ "FUTEX_WAIT_BITSET", " val=0x%08llx", " utime=0x%08llx", NULL, " val3=0x%08llx" },
|
||
|
|
{ "FUTEX_WAKE_BITSET", " val=%llu", NULL, NULL, " val3=0x%08llx" },
|
||
|
|
{ "FUTEX_WAIT_REQUEUE_PI", " val=0x%08llx", " utime=0x%08llx", " uaddr2=0x%08llx", " val3=0x%08llx" },
|
||
|
|
{ "FUTEX_CMP_REQUEUE_PI", " val=%llu", " val2=%llu", " uaddr2=0x%08llx", " val3=0x%08llx" },
|
||
|
|
};
|
||
|
|
|
||
|
|
|
||
|
|
static void futex_print(struct trace_seq *s, const struct futex_args *args,
|
||
|
|
const struct futex_op *fop)
|
||
|
|
{
|
||
|
|
trace_seq_printf(s, " uaddr=0x%08llx", args->uaddr);
|
||
|
|
|
||
|
|
if (fop->fmt_val)
|
||
|
|
trace_seq_printf(s, fop->fmt_val, args->val);
|
||
|
|
|
||
|
|
if (fop->fmt_utime)
|
||
|
|
trace_seq_printf(s,fop->fmt_utime, args->utime);
|
||
|
|
|
||
|
|
if (fop->fmt_uaddr2)
|
||
|
|
trace_seq_printf(s, fop->fmt_uaddr2, args->uaddr2);
|
||
|
|
|
||
|
|
if (fop->fmt_val3)
|
||
|
|
trace_seq_printf(s, fop->fmt_val3, args->val3);
|
||
|
|
}
|
||
|
|
|
||
|
|
static int futex_handler(struct trace_seq *s, struct tep_record *record,
|
||
|
|
struct tep_event *event, void *context)
|
||
|
|
{
|
||
|
|
const struct futex_op *fop;
|
||
|
|
struct futex_args args;
|
||
|
|
unsigned long long cmd;
|
||
|
|
|
||
|
|
if (tep_get_field_val(s, event, "uaddr", record, &args.uaddr, 1))
|
||
|
|
return 1;
|
||
|
|
|
||
|
|
if (tep_get_field_val(s, event, "op", record, &args.op, 1))
|
||
|
|
return 1;
|
||
|
|
|
||
|
|
if (tep_get_field_val(s, event, "val", record, &args.val, 1))
|
||
|
|
return 1;
|
||
|
|
|
||
|
|
if (tep_get_field_val(s, event, "utime", record, &args.utime, 1))
|
||
|
|
return 1;
|
||
|
|
|
||
|
|
if (tep_get_field_val(s, event, "uaddr2", record, &args.uaddr2, 1))
|
||
|
|
return 1;
|
||
|
|
|
||
|
|
if (tep_get_field_val(s, event, "val3", record, &args.val3, 1))
|
||
|
|
return 1;
|
||
|
|
|
||
|
|
cmd = args.op & FUTEX_CMD_MASK;
|
||
|
|
if (cmd >= ARRAY_SIZE(futex_op_tbl))
|
||
|
|
return 1;
|
||
|
|
|
||
|
|
fop = &futex_op_tbl[cmd];
|
||
|
|
|
||
|
|
trace_seq_printf(s, "op=%s", fop->name);
|
||
|
|
|
||
|
|
if (args.op & FUTEX_PRIVATE_FLAG)
|
||
|
|
trace_seq_puts(s, "|FUTEX_PRIVATE_FLAG");
|
||
|
|
|
||
|
|
if (args.op & FUTEX_CLOCK_REALTIME)
|
||
|
|
trace_seq_puts(s, "|FUTEX_CLOCK_REALTIME");
|
||
|
|
|
||
|
|
futex_print(s, &args, fop);
|
||
|
|
return 0;
|
||
|
|
}
|
||
|
|
|
||
|
|
int TEP_PLUGIN_LOADER(struct tep_handle *tep)
|
||
|
|
{
|
||
|
|
tep_register_event_handler(tep, -1, "syscalls", "sys_enter_futex",
|
||
|
|
futex_handler, NULL);
|
||
|
|
return 0;
|
||
|
|
}
|
||
|
|
|
||
|
|
void TEP_PLUGIN_UNLOADER(struct tep_handle *tep)
|
||
|
|
{
|
||
|
|
tep_unregister_event_handler(tep, -1, "syscalls", "sys_enter_futex",
|
||
|
|
futex_handler, NULL);
|
||
|
|
}
|