gvisor

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 Go to latest Published: Dec 29, 2021 License: Apache-2.0, MIT

README

gVisor

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What is gVisor?

gVisor is an application kernel, written in Go, that implements a substantial portion of the Linux system surface. It includes an Open Container Initiative (OCI) runtime called runsc that provides an isolation boundary between the application and the host kernel. The runsc runtime integrates with Docker and Kubernetes, making it simple to run sandboxed containers.

Why does gVisor exist?

Containers are not a sandbox. While containers have revolutionized how we develop, package, and deploy applications, using them to run untrusted or potentially malicious code without additional isolation is not a good idea. While using a single, shared kernel allows for efficiency and performance gains, it also means that container escape is possible with a single vulnerability.

gVisor is an application kernel for containers. It limits the host kernel surface accessible to the application while still giving the application access to all the features it expects. Unlike most kernels, gVisor does not assume or require a fixed set of physical resources; instead, it leverages existing host kernel functionality and runs as a normal process. In other words, gVisor implements Linux by way of Linux.

gVisor should not be confused with technologies and tools to harden containers against external threats, provide additional integrity checks, or limit the scope of access for a service. One should always be careful about what data is made available to a container.

Documentation

User documentation and technical architecture, including quick start guides, can be found at gvisor.dev.

Installing from source

gVisor builds on x86_64 and ARM64. Other architectures may become available in the future.

For the purposes of these instructions, bazel and other build dependencies are wrapped in a build container. It is possible to use bazel directly, or type make help for standard targets.

Requirements

Make sure the following dependencies are installed:

Building

Build and install the runsc binary:

mkdir -p bin
make copy TARGETS=runsc DESTINATION=bin/
sudo cp ./bin/runsc /usr/local/bin

Testing

To run standard test suites, you can use:

make unit-tests
make tests

To run specific tests, you can specify the target:

make test TARGETS="//runsc:version_test"

Using go get

This project uses bazel to build and manage dependencies. A synthetic go branch is maintained that is compatible with standard go tooling for convenience.

For example, to build and install runsc directly from this branch:

echo "module runsc" > go.mod
GO111MODULE=on go get gvisor.dev/gvisor/runsc@go
CGO_ENABLED=0 GO111MODULE=on sudo -E go build -o /usr/local/bin/runsc gvisor.dev/gvisor/runsc

Subsequently, you can build and install the shim binary for containerd:

GO111MODULE=on sudo -E go build -o /usr/local/bin/containerd-shim-runsc-v1 gvisor.dev/gvisor/shim

Note that this branch is supported in a best effort capacity, and direct development on this branch is not supported. Development should occur on the master branch, which is then reflected into the go branch.

Community & Governance

See GOVERNANCE.md for project governance information.

The gvisor-users mailing list and gvisor-dev mailing list are good starting points for questions and discussion.

Security Policy

See SECURITY.md.

Contributing

See Contributing.md.

Directories

Path Synopsis
pkg
abi
Package abi describes the interface between a kernel and userspace.
 Package abi describes the interface between a kernel and userspace.
abi/attestation
Package attestation includes definitions needed for gVisor attestation.
 Package attestation includes definitions needed for gVisor attestation.
abi/linux
Package linux contains the constants and types needed to interface with a Linux kernel.
 Package linux contains the constants and types needed to interface with a Linux kernel.
abi/linux/errno
Package errno holds errno codes for abi/linux.
 Package errno holds errno codes for abi/linux.
atomicbitops
Package atomicbitops provides extensions to the sync/atomic package.
 Package atomicbitops provides extensions to the sync/atomic package.
binary
Package binary translates between select fixed-sized types and a binary representation.
 Package binary translates between select fixed-sized types and a binary representation.
bitmap
Package bitmap provides the implementation of bitmap.
 Package bitmap provides the implementation of bitmap.
bits
Package bits includes all bit related types and operations.
 Package bits includes all bit related types and operations.
bpf
Package bpf provides tools for working with Berkeley Packet Filter (BPF) programs.
 Package bpf provides tools for working with Berkeley Packet Filter (BPF) programs.
buffer
Package buffer provides the implementation of a buffer view.
 Package buffer provides the implementation of a buffer view.
cleanup
Package cleanup provides utilities to clean "stuff" on defers.
 Package cleanup provides utilities to clean "stuff" on defers.
compressio
Package compressio provides parallel compression and decompression, as well as optional SHA-256 hashing.
 Package compressio provides parallel compression and decompression, as well as optional SHA-256 hashing.
context
Package context defines an internal context type.
 Package context defines an internal context type.
control/client
Package client provides a basic control client interface.
 Package client provides a basic control client interface.
control/server
Package server provides a basic control server interface.
 Package server provides a basic control server interface.
coverage
Package coverage provides an interface through which Go coverage data can be collected, converted to kcov format, and exposed to userspace.
 Package coverage provides an interface through which Go coverage data can be collected, converted to kcov format, and exposed to userspace.
cpuid
Package cpuid provides basic functionality for creating and adjusting CPU feature sets.
 Package cpuid provides basic functionality for creating and adjusting CPU feature sets.
crypto
Package crypto wraps crypto primitives.
 Package crypto wraps crypto primitives.
errors
Package errors holds the standardized error definition for gVisor.
 Package errors holds the standardized error definition for gVisor.
errors/linuxerr
Package linuxerr contains syscall error codes exported as an error interface pointers.
 Package linuxerr contains syscall error codes exported as an error interface pointers.
eventchannel
Package eventchannel contains functionality for sending any protobuf message on a socketpair.
 Package eventchannel contains functionality for sending any protobuf message on a socketpair.
eventfd
Package eventfd wraps Linux's eventfd(2) syscall.
 Package eventfd wraps Linux's eventfd(2) syscall.
fd
Package fd provides types for working with file descriptors.
 Package fd provides types for working with file descriptors.
fdchannel
Package fdchannel implements passing file descriptors between processes over Unix domain sockets.
 Package fdchannel implements passing file descriptors between processes over Unix domain sockets.
fdnotifier
Package fdnotifier contains an adapter that translates IO events (e.g., a file became readable/writable) from native FDs to the notifications in the waiter package.
 Package fdnotifier contains an adapter that translates IO events (e.g., a file became readable/writable) from native FDs to the notifications in the waiter package.
flipcall
Package flipcall implements a protocol providing Fast Local Interprocess Procedure Calls between mutually-distrusting processes.
 Package flipcall implements a protocol providing Fast Local Interprocess Procedure Calls between mutually-distrusting processes.
fspath
Package fspath provides efficient tools for working with file paths in Linux-compatible filesystem implementations.
 Package fspath provides efficient tools for working with file paths in Linux-compatible filesystem implementations.
gohacks
Package gohacks contains utilities for subverting the Go compiler.
 Package gohacks contains utilities for subverting the Go compiler.
goid
Package goid provides the Get function.
 Package goid provides the Get function.
hostarch
Package hostarch contains host arch address operations for user memory.
 Package hostarch contains host arch address operations for user memory.
ilist
Package ilist provides the implementation of intrusive linked lists.
 Package ilist provides the implementation of intrusive linked lists.
linewriter
Package linewriter provides an io.Writer which calls an emitter on each line.
 Package linewriter provides an io.Writer which calls an emitter on each line.
lisafs
Package lisafs (LInux SAndbox FileSystem) defines the protocol for filesystem RPCs between an untrusted Sandbox (client) and a trusted filesystem server.
 Package lisafs (LInux SAndbox FileSystem) defines the protocol for filesystem RPCs between an untrusted Sandbox (client) and a trusted filesystem server.
lisafs/testsuite
Package testsuite provides a integration testing suite for lisafs.
 Package testsuite provides a integration testing suite for lisafs.
log
Package log implements a library for logging.
 Package log implements a library for logging.
marshal
Package marshal defines the Marshallable interface for serialize/deserializing go data structures to/from memory, according to the Linux ABI.
 Package marshal defines the Marshallable interface for serialize/deserializing go data structures to/from memory, according to the Linux ABI.
marshal/primitive
Package primitive defines marshal.Marshallable implementations for primitive types.
 Package primitive defines marshal.Marshallable implementations for primitive types.
memutil
Package memutil provides utilities for working with shared memory files.
 Package memutil provides utilities for working with shared memory files.
merkletree
Package merkletree implements Merkle tree generating and verification.
 Package merkletree implements Merkle tree generating and verification.
metric
Package metric provides primitives for collecting metrics.
 Package metric provides primitives for collecting metrics.
p9
Package p9 is a 9P2000.L implementation.
 Package p9 is a 9P2000.L implementation.
p9/p9test
Package p9test provides standard mocks for p9.
 Package p9test provides standard mocks for p9.
pool
Package pool provides a trivial integer pool.
 Package pool provides a trivial integer pool.
procid
Package procid provides a way to get the current system thread identifier.
 Package procid provides a way to get the current system thread identifier.
rand
Package rand implements a cryptographically secure pseudorandom number generator.
 Package rand implements a cryptographically secure pseudorandom number generator.
refs
Package refs defines an interface for reference counted objects.
 Package refs defines an interface for reference counted objects.
ring0
Package ring0 provides basic operating system-level stubs.
 Package ring0 provides basic operating system-level stubs.
ring0/gen_offsets
Binary gen_offsets is a helper for generating offset headers.
 Binary gen_offsets is a helper for generating offset headers.
ring0/pagetables
Package pagetables provides a generic implementation of pagetables.
 Package pagetables provides a generic implementation of pagetables.
safecopy
Package safecopy provides an efficient implementation of functions to access memory that may result in SIGSEGV or SIGBUS being sent to the accessor.
 Package safecopy provides an efficient implementation of functions to access memory that may result in SIGSEGV or SIGBUS being sent to the accessor.
safemem
Package safemem provides the Block and BlockSeq types.
 Package safemem provides the Block and BlockSeq types.
secio
Package secio provides support for sectioned I/O.
 Package secio provides support for sectioned I/O.
segment
Package segment provides tools for working with collections of segments.
 Package segment provides tools for working with collections of segments.
segment/test
Package segment is a test package.
 Package segment is a test package.
sentry/arch
Package arch provides abstractions around architecture-dependent details, such as syscall calling conventions, native types, etc.
 Package arch provides abstractions around architecture-dependent details, such as syscall calling conventions, native types, etc.
sentry/arch/fpu
Package fpu provides basic floating point helpers.
 Package fpu provides basic floating point helpers.
sentry/contexttest
Package contexttest builds a test context.Context.
 Package contexttest builds a test context.Context.
sentry/control
Package control contains types that expose control server methods, and can be used to configure and interact with a running sandbox process.
 Package control contains types that expose control server methods, and can be used to configure and interact with a running sandbox process.
sentry/device
Package device defines reserved virtual kernel devices and structures for managing them.
 Package device defines reserved virtual kernel devices and structures for managing them.
sentry/devices/memdev
Package memdev implements "mem" character devices, as implemented in Linux by drivers/char/mem.c and drivers/char/random.c.
 Package memdev implements "mem" character devices, as implemented in Linux by drivers/char/mem.c and drivers/char/random.c.
sentry/devices/ttydev
Package ttydev implements an unopenable vfs.Device for /dev/tty.
 Package ttydev implements an unopenable vfs.Device for /dev/tty.
sentry/devices/tundev
Package tundev implements the /dev/net/tun device.
 Package tundev implements the /dev/net/tun device.
sentry/fdimport
Package fdimport provides the Import function.
 Package fdimport provides the Import function.
sentry/fs
Package fs implements a virtual filesystem layer.
 Package fs implements a virtual filesystem layer.
sentry/fs/anon
Package anon implements an anonymous inode, useful for implementing inodes for pseudo filesystems.
 Package anon implements an anonymous inode, useful for implementing inodes for pseudo filesystems.
sentry/fs/dev
Package dev provides a filesystem with simple devices.
 Package dev provides a filesystem with simple devices.
sentry/fs/fdpipe
Package fdpipe implements common namedpipe opening and accessing logic.
 Package fdpipe implements common namedpipe opening and accessing logic.
sentry/fs/filetest
Package filetest provides a test implementation of an fs.File.
 Package filetest provides a test implementation of an fs.File.
sentry/fs/fsutil
Package fsutil provides utilities for implementing fs.InodeOperations and fs.FileOperations: - For embeddable utilities, see inode.go and file.go.
 Package fsutil provides utilities for implementing fs.InodeOperations and fs.FileOperations: - For embeddable utilities, see inode.go and file.go.
sentry/fs/gofer
Package gofer implements a remote 9p filesystem.
 Package gofer implements a remote 9p filesystem.
sentry/fs/host
Package host supports file descriptors imported directly.
 Package host supports file descriptors imported directly.
sentry/fs/lock
Package lock is the API for POSIX-style advisory regional file locks and BSD-style full file locks.
 Package lock is the API for POSIX-style advisory regional file locks and BSD-style full file locks.
sentry/fs/proc
Package proc implements a partial in-memory file system for procfs.
 Package proc implements a partial in-memory file system for procfs.
sentry/fs/proc/device
Package device contains the proc device to avoid dependency loops.
 Package device contains the proc device to avoid dependency loops.
sentry/fs/proc/seqfile
Package seqfile provides dynamic ordered files.
 Package seqfile provides dynamic ordered files.
sentry/fs/ramfs
Package ramfs provides the fundamentals for a simple in-memory filesystem.
 Package ramfs provides the fundamentals for a simple in-memory filesystem.
sentry/fs/sys
Package sys implements a sysfs filesystem.
 Package sys implements a sysfs filesystem.
sentry/fs/timerfd
Package timerfd implements the semantics of Linux timerfd objects as described by timerfd_create(2).
 Package timerfd implements the semantics of Linux timerfd objects as described by timerfd_create(2).
sentry/fs/tmpfs
Package tmpfs is a filesystem implementation backed by memory.
 Package tmpfs is a filesystem implementation backed by memory.
sentry/fs/tty
Package tty provide pseudoterminals via a devpts filesystem.
 Package tty provide pseudoterminals via a devpts filesystem.
sentry/fs/user
Package user contains methods for resolving filesystem paths based on the user and their environment.
 Package user contains methods for resolving filesystem paths based on the user and their environment.
sentry/fsbridge
Package fsbridge provides common interfaces to bridge between VFS1 and VFS2 files.
 Package fsbridge provides common interfaces to bridge between VFS1 and VFS2 files.
sentry/fsimpl/cgroupfs
Package cgroupfs implements cgroupfs.
 Package cgroupfs implements cgroupfs.
sentry/fsimpl/devpts
Package devpts provides a filesystem implementation that behaves like devpts.
 Package devpts provides a filesystem implementation that behaves like devpts.
sentry/fsimpl/devtmpfs
Package devtmpfs provides an implementation of /dev based on tmpfs, analogous to Linux's devtmpfs.
 Package devtmpfs provides an implementation of /dev based on tmpfs, analogous to Linux's devtmpfs.
sentry/fsimpl/eventfd
Package eventfd implements event fds.
 Package eventfd implements event fds.
sentry/fsimpl/fuse
Package fuse implements fusefs.
 Package fuse implements fusefs.
sentry/fsimpl/gofer
Package gofer provides a filesystem implementation that is backed by a 9p server, interchangably referred to as "gofers" throughout this package.
 Package gofer provides a filesystem implementation that is backed by a 9p server, interchangably referred to as "gofers" throughout this package.
sentry/fsimpl/host
Package host provides a filesystem implementation for host files imported as file descriptors.
 Package host provides a filesystem implementation for host files imported as file descriptors.
sentry/fsimpl/kernfs
Package kernfs provides the tools to implement inode-based filesystems.
 Package kernfs provides the tools to implement inode-based filesystems.
sentry/fsimpl/mqfs
Package mqfs provides a filesystem implementation to back POSIX message queues.
 Package mqfs provides a filesystem implementation to back POSIX message queues.
sentry/fsimpl/overlay
Package overlay provides an overlay filesystem implementation, which synthesizes a filesystem by composing one or more immutable filesystems ("lower layers") with an optional mutable filesystem ("upper layer").
 Package overlay provides an overlay filesystem implementation, which synthesizes a filesystem by composing one or more immutable filesystems ("lower layers") with an optional mutable filesystem ("upper layer").
sentry/fsimpl/pipefs
Package pipefs provides the filesystem implementation backing Kernel.PipeMount.
 Package pipefs provides the filesystem implementation backing Kernel.PipeMount.
sentry/fsimpl/proc
Package proc implements a partial in-memory file system for procfs.
 Package proc implements a partial in-memory file system for procfs.
sentry/fsimpl/signalfd
Package signalfd provides basic signalfd file implementations.
 Package signalfd provides basic signalfd file implementations.
sentry/fsimpl/sockfs
Package sockfs provides a filesystem implementation for anonymous sockets.
 Package sockfs provides a filesystem implementation for anonymous sockets.
sentry/fsimpl/sys
Package sys implements sysfs.
 Package sys implements sysfs.
sentry/fsimpl/testutil
Package testutil provides common test utilities for kernfs-based filesystems.
 Package testutil provides common test utilities for kernfs-based filesystems.
sentry/fsimpl/timerfd
Package timerfd implements timer fds.
 Package timerfd implements timer fds.
sentry/fsimpl/tmpfs
Package tmpfs provides an in-memory filesystem whose contents are application-mutable, consistent with Linux's tmpfs.
 Package tmpfs provides an in-memory filesystem whose contents are application-mutable, consistent with Linux's tmpfs.
sentry/fsimpl/verity
Package verity provides a filesystem implementation that is a wrapper of another file system.
 Package verity provides a filesystem implementation that is a wrapper of another file system.
sentry/fsmetric
Package fsmetric defines filesystem metrics that are used by both VFS1 and VFS2.
 Package fsmetric defines filesystem metrics that are used by both VFS1 and VFS2.
sentry/hostcpu
Package hostcpu provides utilities for working with CPU information provided by a host Linux kernel.
 Package hostcpu provides utilities for working with CPU information provided by a host Linux kernel.
sentry/hostfd
Package hostfd provides efficient I/O with host file descriptors.
 Package hostfd provides efficient I/O with host file descriptors.
sentry/hostmm
Package hostmm provides tools for interacting with the host Linux kernel's virtual memory management subsystem.
 Package hostmm provides tools for interacting with the host Linux kernel's virtual memory management subsystem.
sentry/inet
Package inet defines semantics for IP stacks.
 Package inet defines semantics for IP stacks.
sentry/kernel
Package kernel provides an emulation of the Linux kernel.
 Package kernel provides an emulation of the Linux kernel.
sentry/kernel/auth
Package auth implements an access control model that is a subset of Linux's.
 Package auth implements an access control model that is a subset of Linux's.
sentry/kernel/contexttest
Package contexttest provides a test context.Context which includes a dummy kernel pointing to a valid platform.
 Package contexttest provides a test context.Context which includes a dummy kernel pointing to a valid platform.
sentry/kernel/epoll
Package epoll provides an implementation of Linux's IO event notification facility.
 Package epoll provides an implementation of Linux's IO event notification facility.
sentry/kernel/eventfd
Package eventfd provides an implementation of Linux's file-based event notification.
 Package eventfd provides an implementation of Linux's file-based event notification.
sentry/kernel/fasync
Package fasync provides FIOASYNC related functionality.
 Package fasync provides FIOASYNC related functionality.
sentry/kernel/futex
Package futex provides an implementation of the futex interface as found in the Linux kernel.
 Package futex provides an implementation of the futex interface as found in the Linux kernel.
sentry/kernel/ipc
Package ipc defines functionality and utilities common to sysvipc mechanisms.
 Package ipc defines functionality and utilities common to sysvipc mechanisms.
sentry/kernel/memevent
Package memevent implements the memory usage events controller, which periodically emits events via the eventchannel.
 Package memevent implements the memory usage events controller, which periodically emits events via the eventchannel.
sentry/kernel/mq
Package mq provides an implementation for POSIX message queues.
 Package mq provides an implementation for POSIX message queues.
sentry/kernel/msgqueue
Package msgqueue implements System V message queues.
 Package msgqueue implements System V message queues.
sentry/kernel/pipe
Package pipe provides a pipe implementation.
 Package pipe provides a pipe implementation.
sentry/kernel/sched
Package sched implements scheduler related features.
 Package sched implements scheduler related features.
sentry/kernel/semaphore
Package semaphore implements System V semaphores.
 Package semaphore implements System V semaphores.
sentry/kernel/shm
Package shm implements sysv shared memory segments.
 Package shm implements sysv shared memory segments.
sentry/kernel/signalfd
Package signalfd provides an implementation of signal file descriptors.
 Package signalfd provides an implementation of signal file descriptors.
sentry/kernel/time
Package time defines the Timer type, which provides a periodic timer that works by sampling a user-provided clock.
 Package time defines the Timer type, which provides a periodic timer that works by sampling a user-provided clock.
sentry/limits
Package limits provides resource limits.
 Package limits provides resource limits.
sentry/loader
Package loader loads an executable file into a MemoryManager.
 Package loader loads an executable file into a MemoryManager.
sentry/loader/vdsodata
Package vdsodata contains a compiled VDSO object.
 Package vdsodata contains a compiled VDSO object.
sentry/memmap
Package memmap defines semantics for memory mappings.
 Package memmap defines semantics for memory mappings.
sentry/mm
Package mm provides a memory management subsystem.
 Package mm provides a memory management subsystem.
sentry/pgalloc
Package pgalloc contains the page allocator subsystem, which manages memory that may be mapped into application address spaces.
 Package pgalloc contains the page allocator subsystem, which manages memory that may be mapped into application address spaces.
sentry/platform
Package platform provides a Platform abstraction.
 Package platform provides a Platform abstraction.
sentry/platform/interrupt
Package interrupt provides an interrupt helper.
 Package interrupt provides an interrupt helper.
sentry/platform/kvm
Package kvm provides a kvm-based implementation of the platform interface.
 Package kvm provides a kvm-based implementation of the platform interface.
sentry/platform/kvm/testutil
Package testutil provides common assembly stubs for testing.
 Package testutil provides common assembly stubs for testing.
sentry/platform/ptrace
Package ptrace provides a ptrace-based implementation of the platform interface.
 Package ptrace provides a ptrace-based implementation of the platform interface.
sentry/seccheck
Package seccheck defines a structure for dynamically-configured security checks in the sentry.
 Package seccheck defines a structure for dynamically-configured security checks in the sentry.
sentry/socket
Package socket provides the interfaces that need to be provided by socket implementations and providers, as well as per family demultiplexing of socket creation.
 Package socket provides the interfaces that need to be provided by socket implementations and providers, as well as per family demultiplexing of socket creation.
sentry/socket/control
Package control provides internal representations of socket control messages.
 Package control provides internal representations of socket control messages.
sentry/socket/hostinet
Package hostinet implements AF_INET and AF_INET6 sockets using the host's network stack.
 Package hostinet implements AF_INET and AF_INET6 sockets using the host's network stack.
sentry/socket/netfilter
Package netfilter helps the sentry interact with netstack's netfilter capabilities.
 Package netfilter helps the sentry interact with netstack's netfilter capabilities.
sentry/socket/netlink
Package netlink provides core functionality for netlink sockets.
 Package netlink provides core functionality for netlink sockets.
sentry/socket/netlink/port
Package port provides port ID allocation for netlink sockets.
 Package port provides port ID allocation for netlink sockets.
sentry/socket/netlink/route
Package route provides a NETLINK_ROUTE socket protocol.
 Package route provides a NETLINK_ROUTE socket protocol.
sentry/socket/netlink/uevent
Package uevent provides a NETLINK_KOBJECT_UEVENT socket protocol.
 Package uevent provides a NETLINK_KOBJECT_UEVENT socket protocol.
sentry/socket/netstack
Package netstack provides an implementation of the socket.Socket interface that is backed by a tcpip.Endpoint.
 Package netstack provides an implementation of the socket.Socket interface that is backed by a tcpip.Endpoint.
sentry/socket/unix
Package unix provides an implementation of the socket.Socket interface for the AF_UNIX protocol family.
 Package unix provides an implementation of the socket.Socket interface for the AF_UNIX protocol family.
sentry/socket/unix/transport
Package transport contains the implementation of Unix endpoints.
 Package transport contains the implementation of Unix endpoints.
sentry/state
Package state provides high-level state wrappers.
 Package state provides high-level state wrappers.
sentry/strace
Package strace implements the logic to print out the input and the return value of each traced syscall.
 Package strace implements the logic to print out the input and the return value of each traced syscall.
sentry/syscalls
Package syscalls is the interface from the application to the kernel.
 Package syscalls is the interface from the application to the kernel.
sentry/syscalls/linux
Package linux provides syscall tables for amd64 Linux.
 Package linux provides syscall tables for amd64 Linux.
sentry/syscalls/linux/vfs2
Package vfs2 provides syscall implementations that use VFS2.
 Package vfs2 provides syscall implementations that use VFS2.
sentry/time
Package time provides a calibrated clock synchronized to a system reference clock.
 Package time provides a calibrated clock synchronized to a system reference clock.
sentry/unimpl
Package unimpl contains interface to emit events about unimplemented features.
 Package unimpl contains interface to emit events about unimplemented features.
sentry/uniqueid
Package uniqueid defines context.Context keys for obtaining system-wide unique identifiers.
 Package uniqueid defines context.Context keys for obtaining system-wide unique identifiers.
sentry/usage
Package usage provides representations of resource usage.
 Package usage provides representations of resource usage.
sentry/vfs
Package vfs implements a virtual filesystem layer.
 Package vfs implements a virtual filesystem layer.
sentry/vfs/genericfstree
Package genericfstree provides tools for implementing vfs.FilesystemImpls where a single statically-determined lock or set of locks is sufficient to ensure that a Dentry's name and parent are contextually immutable.
 Package genericfstree provides tools for implementing vfs.FilesystemImpls where a single statically-determined lock or set of locks is sufficient to ensure that a Dentry's name and parent are contextually immutable.
sentry/vfs/memxattr
Package memxattr provides a default, in-memory extended attribute implementation.
 Package memxattr provides a default, in-memory extended attribute implementation.
sentry/watchdog
Package watchdog is responsible for monitoring the sentry for tasks that may potentially be stuck or looping inderterminally causing hard to debug hungs in the untrusted app.
 Package watchdog is responsible for monitoring the sentry for tasks that may potentially be stuck or looping inderterminally causing hard to debug hungs in the untrusted app.
shim
Package shim implements Containerd Shim v2 interface.
 Package shim implements Containerd Shim v2 interface.
shim/proc
Package proc is responsible to manage the communication between the shim and the sandbox process running the container.
 Package proc is responsible to manage the communication between the shim and the sandbox process running the container.
shim/runsc
Package runsc provides an API to interact with runsc command line.
 Package runsc provides an API to interact with runsc command line.
shim/runtimeoptions
Package runtimeoptions contains the runtimeoptions proto for containerd 1.5 and above.
 Package runtimeoptions contains the runtimeoptions proto for containerd 1.5 and above.
shim/runtimeoptions/v14
Package v14 contains the runtimeoptions proto for containerd 1.4 and earlier.
 Package v14 contains the runtimeoptions proto for containerd 1.4 and earlier.
shim/utils
Package utils container miscellaneous utility function used by the shim.
 Package utils container miscellaneous utility function used by the shim.
sighandling
Package sighandling contains helpers for handling signals to applications.
 Package sighandling contains helpers for handling signals to applications.
sleep
Package sleep allows goroutines to efficiently sleep on multiple sources of notifications (wakers).
 Package sleep allows goroutines to efficiently sleep on multiple sources of notifications (wakers).
state
Package state provides functionality related to saving and loading object graphs.
 Package state provides functionality related to saving and loading object graphs.
state/pretty
Package pretty is a pretty-printer for state streams.
 Package pretty is a pretty-printer for state streams.
state/statefile
Package statefile defines the state file data stream.
 Package statefile defines the state file data stream.
state/tests
Package tests tests the state packages.
 Package tests tests the state packages.
state/wire
Package wire contains a few basic types that can be composed to serialize graph information for the state package.
 Package wire contains a few basic types that can be composed to serialize graph information for the state package.
sync
Package sync provides synchronization primitives.
 Package sync provides synchronization primitives.
sync/atomicptr
Package seqatomic doesn't exist.
 Package seqatomic doesn't exist.
sync/atomicptrmap
Package atomicptrmap instantiates generic_atomicptrmap for testing.
 Package atomicptrmap instantiates generic_atomicptrmap for testing.
sync/seqatomic
Package seqatomic doesn't exist.
 Package seqatomic doesn't exist.
syncevent
Package syncevent provides efficient primitives for goroutine synchronization based on event bitmasks.
 Package syncevent provides efficient primitives for goroutine synchronization based on event bitmasks.
syserr
Package syserr contains sandbox-internal errors.
 Package syserr contains sandbox-internal errors.
tcpip
Package tcpip provides the interfaces and related types that users of the tcpip stack will use in order to create endpoints used to send and receive data over the network stack.
 Package tcpip provides the interfaces and related types that users of the tcpip stack will use in order to create endpoints used to send and receive data over the network stack.
tcpip/adapters/gonet
Package gonet provides a Go net package compatible wrapper for a tcpip stack.
 Package gonet provides a Go net package compatible wrapper for a tcpip stack.
tcpip/buffer
Package buffer provides the implementation of a buffer view.
 Package buffer provides the implementation of a buffer view.
tcpip/checker
Package checker provides helper functions to check networking packets for validity.
 Package checker provides helper functions to check networking packets for validity.
tcpip/faketime
Package faketime provides a fake clock that implements tcpip.Clock interface.
 Package faketime provides a fake clock that implements tcpip.Clock interface.
tcpip/hash/jenkins
Package jenkins implements Jenkins's one_at_a_time, non-cryptographic hash functions created by by Bob Jenkins.
 Package jenkins implements Jenkins's one_at_a_time, non-cryptographic hash functions created by by Bob Jenkins.
tcpip/header
Package header provides the implementation of the encoding and decoding of network protocol headers.
 Package header provides the implementation of the encoding and decoding of network protocol headers.
tcpip/header/parse
Package parse provides utilities to parse packets.
 Package parse provides utilities to parse packets.
tcpip/internal/tcp
Package tcp contains internal type definitions that are not expected to be used by anyone else outside pkg/tcpip.
 Package tcp contains internal type definitions that are not expected to be used by anyone else outside pkg/tcpip.
tcpip/link/channel
Package channel provides the implemention of channel-based data-link layer endpoints.
 Package channel provides the implemention of channel-based data-link layer endpoints.
tcpip/link/ethernet
Package ethernet provides an implementation of an ethernet link endpoint that wraps an inner link endpoint.
 Package ethernet provides an implementation of an ethernet link endpoint that wraps an inner link endpoint.
tcpip/link/fdbased
Package fdbased provides the implemention of data-link layer endpoints backed by boundary-preserving file descriptors (e.g., TUN devices, seqpacket/datagram sockets).
 Package fdbased provides the implemention of data-link layer endpoints backed by boundary-preserving file descriptors (e.g., TUN devices, seqpacket/datagram sockets).
tcpip/link/loopback
Package loopback provides the implemention of loopback data-link layer endpoints.
 Package loopback provides the implemention of loopback data-link layer endpoints.
tcpip/link/muxed
Package muxed provides a muxed link endpoints.
 Package muxed provides a muxed link endpoints.
tcpip/link/nested
Package nested provides helpers to implement the pattern of nested stack.LinkEndpoints.
 Package nested provides helpers to implement the pattern of nested stack.LinkEndpoints.
tcpip/link/pipe
Package pipe provides the implementation of pipe-like data-link layer endpoints.
 Package pipe provides the implementation of pipe-like data-link layer endpoints.
tcpip/link/qdisc/fifo
Package fifo provides the implementation of FIFO queuing discipline that queues all outbound packets and asynchronously dispatches them to the lower link endpoint in the order that they were queued.
 Package fifo provides the implementation of FIFO queuing discipline that queues all outbound packets and asynchronously dispatches them to the lower link endpoint in the order that they were queued.
tcpip/link/rawfile
Package rawfile contains utilities for using the netstack with raw host files on Linux hosts.
 Package rawfile contains utilities for using the netstack with raw host files on Linux hosts.
tcpip/link/sharedmem
Package sharedmem provides the implemention of data-link layer endpoints backed by shared memory.
 Package sharedmem provides the implemention of data-link layer endpoints backed by shared memory.
tcpip/link/sharedmem/pipe
Package pipe implements a shared memory ring buffer on which a single reader and a single writer can operate (read/write) concurrently.
 Package pipe implements a shared memory ring buffer on which a single reader and a single writer can operate (read/write) concurrently.
tcpip/link/sharedmem/queue
Package queue provides the implementation of transmit and receive queues based on shared memory ring buffers.
 Package queue provides the implementation of transmit and receive queues based on shared memory ring buffers.
tcpip/link/sniffer
Package sniffer provides the implementation of data-link layer endpoints that wrap another endpoint and logs inbound and outbound packets.
 Package sniffer provides the implementation of data-link layer endpoints that wrap another endpoint and logs inbound and outbound packets.
tcpip/link/tun
Package tun contains methods to open TAP and TUN devices.
 Package tun contains methods to open TAP and TUN devices.
tcpip/link/waitable
Package waitable provides the implementation of data-link layer endpoints that wrap other endpoints, and can wait for inflight calls to WritePacket or DeliverNetworkPacket to finish (and new ones to be prevented).
 Package waitable provides the implementation of data-link layer endpoints that wrap other endpoints, and can wait for inflight calls to WritePacket or DeliverNetworkPacket to finish (and new ones to be prevented).
tcpip/network/arp
Package arp implements the ARP network protocol.
 Package arp implements the ARP network protocol.
tcpip/network/hash
Package hash contains utility functions for hashing.
 Package hash contains utility functions for hashing.
tcpip/network/internal/fragmentation
Package fragmentation contains the implementation of IP fragmentation.
 Package fragmentation contains the implementation of IP fragmentation.
tcpip/network/internal/ip
Package ip holds IPv4/IPv6 common utilities.
 Package ip holds IPv4/IPv6 common utilities.
tcpip/network/internal/testutil
Package testutil defines types and functions used to test Network Layer functionality such as IP fragmentation.
 Package testutil defines types and functions used to test Network Layer functionality such as IP fragmentation.
tcpip/network/ipv4
Package ipv4 contains the implementation of the ipv4 network protocol.
 Package ipv4 contains the implementation of the ipv4 network protocol.
tcpip/network/ipv6
Package ipv6 contains the implementation of the ipv6 network protocol.
 Package ipv6 contains the implementation of the ipv6 network protocol.
tcpip/ports
Package ports provides PortManager that manages allocating, reserving and releasing ports.
 Package ports provides PortManager that manages allocating, reserving and releasing ports.
tcpip/sample/tun_tcp_connect
This sample creates a stack with TCP and IPv4 protocols on top of a TUN device, and connects to a peer.
 This sample creates a stack with TCP and IPv4 protocols on top of a TUN device, and connects to a peer.
tcpip/sample/tun_tcp_echo
This sample creates a stack with TCP and IPv4 protocols on top of a TUN device, and listens on a port.
 This sample creates a stack with TCP and IPv4 protocols on top of a TUN device, and listens on a port.
tcpip/seqnum
Package seqnum defines the types and methods for TCP sequence numbers such that they fit in 32-bit words and work properly when overflows occur.
 Package seqnum defines the types and methods for TCP sequence numbers such that they fit in 32-bit words and work properly when overflows occur.
tcpip/stack
Package stack provides the glue between networking protocols and the consumers of the networking stack.
 Package stack provides the glue between networking protocols and the consumers of the networking stack.
tcpip/tests/utils
Package utils holds common testing utilities for tcpip.
 Package utils holds common testing utilities for tcpip.
tcpip/testutil
Package testutil provides helper functions for netstack unit tests.
 Package testutil provides helper functions for netstack unit tests.
tcpip/transport
Package transport supports transport protocols.
 Package transport supports transport protocols.
tcpip/transport/icmp
Package icmp contains the implementation of the ICMP and IPv6-ICMP transport protocols for use in ping.
 Package icmp contains the implementation of the ICMP and IPv6-ICMP transport protocols for use in ping.
tcpip/transport/internal/network
Package network provides facilities to support tcpip.Endpoints that operate at the network layer or above.
 Package network provides facilities to support tcpip.Endpoints that operate at the network layer or above.
tcpip/transport/internal/noop
Package noop contains an endpoint that implements all tcpip.Endpoint functions as noops.
 Package noop contains an endpoint that implements all tcpip.Endpoint functions as noops.
tcpip/transport/packet
Package packet provides the implementation of packet sockets (see packet(7)).
 Package packet provides the implementation of packet sockets (see packet(7)).
tcpip/transport/raw
Package raw provides the implementation of raw sockets (see raw(7)).
 Package raw provides the implementation of raw sockets (see raw(7)).
tcpip/transport/tcp
Package tcp contains the implementation of the TCP transport protocol.
 Package tcp contains the implementation of the TCP transport protocol.
tcpip/transport/tcp/testing/context
Package context provides a test context for use in tcp tests.
 Package context provides a test context for use in tcp tests.
tcpip/transport/tcpconntrack
Package tcpconntrack implements a TCP connection tracking object.
 Package tcpconntrack implements a TCP connection tracking object.
tcpip/transport/udp
Package udp contains the implementation of the UDP transport protocol.
 Package udp contains the implementation of the UDP transport protocol.
test/criutil
Package criutil contains utility functions for interacting with the Container Runtime Interface (CRI), principally via the crictl command line tool.
 Package criutil contains utility functions for interacting with the Container Runtime Interface (CRI), principally via the crictl command line tool.
test/dockerutil
Package dockerutil is a collection of utility functions.
 Package dockerutil is a collection of utility functions.
test/testutil
Package testutil contains utility functions for runsc tests.
 Package testutil contains utility functions for runsc tests.
unet
Package unet provides a minimal net package based on Unix Domain Sockets.
 Package unet provides a minimal net package based on Unix Domain Sockets.
urpc
Package urpc provides a minimal RPC package based on unet.
 Package urpc provides a minimal RPC package based on unet.
usermem
Package usermem governs access to user memory.
 Package usermem governs access to user memory.
waiter
Package waiter provides the implementation of a wait queue, where waiters can be enqueued to be notified when an event of interest happens.
 Package waiter provides the implementation of a wait queue, where waiters can be enqueued to be notified when an event of interest happens.
Binary runsc implements the OCI runtime interface.
 Binary runsc implements the OCI runtime interface.
boot
Package boot loads the kernel and runs a container.
 Package boot loads the kernel and runs a container.
boot/filter
Package filter defines all syscalls the sandbox is allowed to make to the host, and installs seccomp filters to prevent prohibited syscalls in case it's compromised.
 Package filter defines all syscalls the sandbox is allowed to make to the host, and installs seccomp filters to prevent prohibited syscalls in case it's compromised.
boot/platforms
Package platforms imports all available platform packages.
 Package platforms imports all available platform packages.
boot/platforms/nonstandard
Package nonstandard provides a place for nonstandard platforms.
 Package nonstandard provides a place for nonstandard platforms.
boot/pprof
Package pprof provides a stub to initialize custom profilers.
 Package pprof provides a stub to initialize custom profilers.
cgroup
Package cgroup provides an interface to read and write configuration to cgroup.
 Package cgroup provides an interface to read and write configuration to cgroup.
cli
Package cli is the main entrypoint for runsc.
 Package cli is the main entrypoint for runsc.
cmd
Package cmd holds implementations of the runsc commands.
 Package cmd holds implementations of the runsc commands.
config
Package config provides basic infrastructure to set configuration settings for runsc.
 Package config provides basic infrastructure to set configuration settings for runsc.
console
Package console contains utilities for working with pty consols in runsc.
 Package console contains utilities for working with pty consols in runsc.
container
Package container creates and manipulates containers.
 Package container creates and manipulates containers.
flag
Package flag wraps flag primitives.
 Package flag wraps flag primitives.
fsgofer
Package fsgofer implements p9.File giving access to local files using a simple mapping from a path prefix that is added to the path requested by the sandbox.
 Package fsgofer implements p9.File giving access to local files using a simple mapping from a path prefix that is added to the path requested by the sandbox.
fsgofer/filter
Package filter defines all syscalls the gofer is allowed to make, and installs seccomp filters to prevent prohibited syscalls in case it's compromised.
 Package filter defines all syscalls the gofer is allowed to make, and installs seccomp filters to prevent prohibited syscalls in case it's compromised.
mitigate
Package mitigate provides libraries for the mitigate command.
 Package mitigate provides libraries for the mitigate command.
sandbox
Package sandbox creates and manipulates sandboxes.
 Package sandbox creates and manipulates sandboxes.
specutils
Package specutils contains utility functions for working with OCI runtime specs.
 Package specutils contains utility functions for working with OCI runtime specs.
specutils/safemount_test
safemount_runner is used to test the SafeMount function.
 safemount_runner is used to test the SafeMount function.
specutils/seccomp
Package seccomp implements some features of libseccomp in order to support OCI.
 Package seccomp implements some features of libseccomp in order to support OCI.
Binary containerd-shim-runsc-v1 is the v2 containerd shim (implementing the formal v1 API).
 Binary containerd-shim-runsc-v1 is the v2 containerd shim (implementing the formal v1 API).
cli
Package cli defines the command line interface for the V2 shim.
 Package cli defines the command line interface for the V2 shim.
test
benchmarks/base
Package base holds utility methods common to the base tests.
 Package base holds utility methods common to the base tests.
benchmarks/database
Package database holds benchmarks around database applications.
 Package database holds benchmarks around database applications.
benchmarks/harness
Package harness holds utility code for running benchmarks on Docker.
 Package harness holds utility code for running benchmarks on Docker.
benchmarks/media
Package media holds benchmarks around media processing applications.
 Package media holds benchmarks around media processing applications.
benchmarks/ml
Package ml holds benchmarks around machine learning performance.
 Package ml holds benchmarks around machine learning performance.
benchmarks/network
Package network holds benchmarks around raw network performance.
 Package network holds benchmarks around raw network performance.
benchmarks/tcp
Binary tcp_proxy is a simple TCP proxy.
 Binary tcp_proxy is a simple TCP proxy.
benchmarks/tools
Package tools holds tooling to couple command formatting and output parsers together.
 Package tools holds tooling to couple command formatting and output parsers together.
cmd/test_app
Binary test_app is like a swiss knife for tests that need to run anything inside the sandbox.
 Binary test_app is like a swiss knife for tests that need to run anything inside the sandbox.
e2e
Package integration is empty.
 Package integration is empty.
fsstress
Package fsstress is empty.
 Package fsstress is empty.
image
Package image is empty.
 Package image is empty.
iptables
Package iptables contains a set of iptables tests implemented as TestCases
 Package iptables contains a set of iptables tests implemented as TestCases
iptables/runner
Package main runs iptables tests from within a docker container.
 Package main runs iptables tests from within a docker container.
packetimpact/dut
Package dut provides common definitions and utilities to be shared by DUTs.
 Package dut provides common definitions and utilities to be shared by DUTs.
packetimpact/dut/linux
Package linux provides utilities specific to bringing up linux DUTs.
 Package linux provides utilities specific to bringing up linux DUTs.
packetimpact/dut/native
The native binary is used to bring up a native linux DUT.
 The native binary is used to bring up a native linux DUT.
packetimpact/dut/runsc
The devid binary is used to get the device ID in the runsc container.
 The devid binary is used to get the device ID in the runsc container.
packetimpact/internal/testing
Package testing provides common testing functionalities.
 Package testing provides common testing functionalities.
packetimpact/netdevs
Package netdevs contains utilities for working with network devices.
 Package netdevs contains utilities for working with network devices.
packetimpact/netdevs/netlink
Package netlink has routines to get interfaces information through netlink.
 Package netlink has routines to get interfaces information through netlink.
packetimpact/runner
The runner binary is used as the test runner for PacketImpact tests.
 The runner binary is used as the test runner for PacketImpact tests.
packetimpact/testbench
Package testbench has utilities to send and receive packets, and also command the DUT to run POSIX functions.
 Package testbench has utilities to send and receive packets, and also command the DUT to run POSIX functions.
root
Package root is used for tests that requires sysadmin privileges run.
 Package root is used for tests that requires sysadmin privileges run.
runner
Binary syscall_test_runner runs the syscall test suites in gVisor containers and on the host platform.
 Binary syscall_test_runner runs the syscall test suites in gVisor containers and on the host platform.
runner/gtest
Package gtest contains helpers for running google-test tests from Go.
 Package gtest contains helpers for running google-test tests from Go.
runtimes/proctor
Binary proctor runs the test for a particular runtime.
 Binary proctor runs the test for a particular runtime.
runtimes/proctor/lib
Package lib contains proctor functions.
 Package lib contains proctor functions.
runtimes/runner
Binary runner runs the runtime tests in a Docker container.
 Binary runner runs the runtime tests in a Docker container.
runtimes/runner/lib
Package lib provides utilities for runner.
 Package lib provides utilities for runner.
uds
Package uds contains helpers for testing external UDS functionality.
 Package uds contains helpers for testing external UDS functionality.
tools
bigquery
Package bigquery defines a BigQuery schema for benchmarks.
 Package bigquery defines a BigQuery schema for benchmarks.
checkescape
Package checkescape allows recursive escape analysis for hot paths.
 Package checkescape allows recursive escape analysis for hot paths.
checkescape/test1
Package test1 is a test package.
 Package test1 is a test package.
checkescape/test2
Package test2 is a test package that imports test1.
 Package test2 is a test package that imports test1.
checklinkname
Package checklinkname ensures that linkname declarations match their source.
 Package checklinkname ensures that linkname declarations match their source.
checklinkname/test
Package test provides linkname test targets.
 Package test provides linkname test targets.
checklocks
Package checklocks performs lock analysis to identify and flag unprotected access to annotated fields.
 Package checklocks performs lock analysis to identify and flag unprotected access to annotated fields.
checklocks/test
Package test is a test package.
 Package test is a test package.
checkunsafe
Package checkunsafe allows unsafe imports only in files named appropriately.
 Package checkunsafe allows unsafe imports only in files named appropriately.
constraintutil
Package constraintutil provides utilities for working with Go build constraints.
 Package constraintutil provides utilities for working with Go build constraints.
github
Binary github is the entry point for GitHub utilities.
 Binary github is the entry point for GitHub utilities.
github/reviver
Package reviver scans the code looking for TODOs and pass them to registered Buggers to ensure TODOs point to active issues.
 Package reviver scans the code looking for TODOs and pass them to registered Buggers to ensure TODOs point to active issues.
go_fieldenum
Binary fieldenum emits field bitmasks for all structs in a package marked "+fieldenum".
 Binary fieldenum emits field bitmasks for all structs in a package marked "+fieldenum".
go_generics
go_generics reads a Go source file and writes a new version of that file with a few transformations applied to each.
 go_generics reads a Go source file and writes a new version of that file with a few transformations applied to each.
go_generics/globals
Package globals provides an AST visitor that calls the visit function for all global identifiers.
 Package globals provides an AST visitor that calls the visit function for all global identifiers.
go_generics/go_merge
go_generics/rules_tests
go_generics/tests/all_types/lib
go_marshal
go_marshal is a code generation utility for automatically generating code to marshal go data structures to memory.
 go_marshal is a code generation utility for automatically generating code to marshal go data structures to memory.
go_marshal/analysis
Package analysis implements common functionality used by generated go_marshal tests.
 Package analysis implements common functionality used by generated go_marshal tests.
go_marshal/gomarshal
Package gomarshal implements the go_marshal code generator.
 Package gomarshal implements the go_marshal code generator.
go_marshal/test
Package test contains data structures for testing the go_marshal tool.
 Package test contains data structures for testing the go_marshal tool.
go_marshal/test/escape
Package escape contains test cases for escape analysis.
 Package escape contains test cases for escape analysis.
go_marshal/test/external
Package external defines types we can import for testing.
 Package external defines types we can import for testing.
go_stateify
Stateify provides a simple way to generate Load/Save methods based on existing types and struct tags.
 Stateify provides a simple way to generate Load/Save methods based on existing types and struct tags.
nogo
Package nogo implements binary analysis similar to bazel's nogo, or the unitchecker package.
 Package nogo implements binary analysis similar to bazel's nogo, or the unitchecker package.
nogo/check
Binary check is the nogo entrypoint.
 Binary check is the nogo entrypoint.
nogo/filter
Binary filter is the filters and reports nogo findings.
 Binary filter is the filters and reports nogo findings.
nogo/objdump
Package objdump is a wrapper around relevant objdump flags.
 Package objdump is a wrapper around relevant objdump flags.
verity
This binary can be used to run a measurement of the verity file system, generate the corresponding Merkle tree files, and return the root hash.
 This binary can be used to run a measurement of the verity file system, generate the corresponding Merkle tree files, and return the root hash.
worker
Package worker provides an implementation of the bazel worker protocol.
 Package worker provides an implementation of the bazel worker protocol.
yamltest
Binary yamltest does strict yaml parsing and validation.
 Binary yamltest does strict yaml parsing and validation.
Binary main serves a mutating Kubernetes webhook.
 Binary main serves a mutating Kubernetes webhook.
pkg/cli
Package cli provides a CLI interface for a mutating Kubernetes webhook.
 Package cli provides a CLI interface for a mutating Kubernetes webhook.
pkg/injector
Package injector handles mutating webhook operations.
 Package injector handles mutating webhook operations.
website
cmd/server
Server is the main gvisor.dev binary.
 Server is the main gvisor.dev binary.
cmd/syscalldocs
Binary syscalldocs generates system call markdown.
 Binary syscalldocs generates system call markdown.

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