forked from Qortal/Brooklyn
You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
123 lines
3.8 KiB
123 lines
3.8 KiB
// SPDX-License-Identifier: LGPL-2.1 |
|
/* |
|
* Copyright (C) 2017 National Instruments Corp. |
|
* |
|
* Author: Julia Cartwright <[email protected]> |
|
* |
|
*/ |
|
#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); |
|
}
|
|
|