92 lines
2.0 KiB
Go
92 lines
2.0 KiB
Go
// Copyright 2018 Google LLC
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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package strace
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import (
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"gvisor.googlesource.com/gvisor/pkg/abi"
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"gvisor.googlesource.com/gvisor/pkg/abi/linux"
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)
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// FutexCmd are the possible futex(2) commands.
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var FutexCmd = abi.ValueSet{
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{
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Value: linux.FUTEX_WAIT,
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Name: "FUTEX_WAIT",
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},
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{
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Value: linux.FUTEX_WAKE,
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Name: "FUTEX_WAKE",
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},
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{
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Value: linux.FUTEX_FD,
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Name: "FUTEX_FD",
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},
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{
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Value: linux.FUTEX_REQUEUE,
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Name: "FUTEX_REQUEUE",
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},
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{
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Value: linux.FUTEX_CMP_REQUEUE,
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Name: "FUTEX_CMP_REQUEUE",
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},
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{
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Value: linux.FUTEX_WAKE_OP,
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Name: "FUTEX_WAKE_OP",
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},
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{
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Value: linux.FUTEX_LOCK_PI,
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Name: "FUTEX_LOCK_PI",
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},
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{
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Value: linux.FUTEX_UNLOCK_PI,
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Name: "FUTEX_UNLOCK_PI",
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},
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{
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Value: linux.FUTEX_TRYLOCK_PI,
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Name: "FUTEX_TRYLOCK_PI",
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},
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{
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Value: linux.FUTEX_WAIT_BITSET,
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Name: "FUTEX_WAIT_BITSET",
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},
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{
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Value: linux.FUTEX_WAKE_BITSET,
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Name: "FUTEX_WAKE_BITSET",
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},
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{
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Value: linux.FUTEX_WAIT_REQUEUE_PI,
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Name: "FUTEX_WAIT_REQUEUE_PI",
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},
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{
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Value: linux.FUTEX_CMP_REQUEUE_PI,
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Name: "FUTEX_CMP_REQUEUE_PI",
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},
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}
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func futex(op uint64) string {
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cmd := op &^ (linux.FUTEX_PRIVATE_FLAG | linux.FUTEX_CLOCK_REALTIME)
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clockRealtime := (op & linux.FUTEX_CLOCK_REALTIME) == linux.FUTEX_CLOCK_REALTIME
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private := (op & linux.FUTEX_PRIVATE_FLAG) == linux.FUTEX_PRIVATE_FLAG
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s := FutexCmd.Parse(cmd)
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if clockRealtime {
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s += "|FUTEX_CLOCK_REALTIME"
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}
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if private {
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s += "|FUTEX_PRIVATE_FLAG"
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}
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return s
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}
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