// 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);}