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Etienne PerotandgVisor bot
056a85f39d
This change marks all ABI-related structs with `structs.HostLayout`, which was introduced in Go 1.23: https://pkg.go.dev/[email protected]#HostLayout This is intended to force the Go compiler to preserve the layout of the struct, removing it from the liberty of reordering fields as it sees fit. Adds a check automatically generated by our `go_library` rule wrapper which verifies this recursively for all exported structs in a package. Fixes issue #10693. PiperOrigin-RevId: 860238103
99 lines
2.6 KiB
Go
99 lines
2.6 KiB
Go
// Copyright 2018 The gVisor Authors.
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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 linux
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import (
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"math"
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"structs"
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)
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// shmat(2) flags. Source: include/uapi/linux/shm.h
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const (
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SHM_RDONLY = 010000 // Read-only access.
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SHM_RND = 020000 // Round attach address to SHMLBA boundary.
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SHM_REMAP = 040000 // Take-over region on attach.
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SHM_EXEC = 0100000 // Execution access.
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)
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// IPCPerm.Mode upper byte flags. Source: include/linux/shm.h
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const (
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SHM_DEST = 01000 // Segment will be destroyed on last detach.
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SHM_LOCKED = 02000 // Segment will not be swapped.
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SHM_HUGETLB = 04000 // Segment will use huge TLB pages.
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SHM_NORESERVE = 010000 // Don't check for reservations.
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)
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// Additional Linux-only flags for shmctl(2). Source: include/uapi/linux/shm.h
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const (
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SHM_LOCK = 11
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SHM_UNLOCK = 12
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SHM_STAT = 13
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SHM_INFO = 14
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)
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// SHM defaults as specified by linux. Source: include/uapi/linux/shm.h
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const (
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SHMMIN = 1
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SHMMNI = 4096
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SHMMAX = math.MaxUint64 - 1<<24
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SHMALL = math.MaxUint64 - 1<<24
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SHMSEG = 4096
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)
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// ShmidDS is equivalent to struct shmid64_ds. Source:
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// include/uapi/asm-generic/shmbuf.h
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//
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// +marshal
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type ShmidDS struct {
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_ structs.HostLayout
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ShmPerm IPCPerm
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ShmSegsz uint64
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ShmAtime TimeT
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ShmDtime TimeT
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ShmCtime TimeT
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ShmCpid int32
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ShmLpid int32
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ShmNattach uint64
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Unused4 uint64
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Unused5 uint64
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}
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// ShmParams is equivalent to struct shminfo. Source: include/uapi/linux/shm.h
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//
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// +marshal
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type ShmParams struct {
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_ structs.HostLayout
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ShmMax uint64
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ShmMin uint64
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ShmMni uint64
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ShmSeg uint64
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ShmAll uint64
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}
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// ShmInfo is equivalent to struct shm_info. Source: include/uapi/linux/shm.h
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//
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// +marshal
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type ShmInfo struct {
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_ structs.HostLayout
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UsedIDs int32 // Number of currently existing segments.
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_ [4]byte
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ShmTot uint64 // Total number of shared memory pages.
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ShmRss uint64 // Number of resident shared memory pages.
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ShmSwp uint64 // Number of swapped shared memory pages.
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SwapAttempts uint64 // Unused since Linux 2.4.
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SwapSuccesses uint64 // Unused since Linux 2.4.
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}
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