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https://github.com/golang/go
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bca17d16ca
Implement CLONE_INTO_CGROUP feature, allowing to put a child in a specified cgroup in a clean and simple way. Note that the feature only works for cgroup v2, and requires Linux kernel 5.7 or newer. Using the feature requires a new syscall, clone3. Currently this is the only reason to use clone3, but the code is structured in a way so that other cases may be easily added in the future. Add a test case. While at it, try to simplify the syscall calling code in forkAndExecInChild1, which became complicated over time because: 1. It was using either rawVforkSyscall or RawSyscall6 depending on whether CLONE_NEWUSER was set. 2. On Linux/s390, the first two arguments to clone(2) system call are swapped (which deserved a mention in Linux ABI hall of shame). It was worked around in rawVforkSyscall on s390, but had to be implemented via a switch/case when using RawSyscall6, making the code less clear. Let's - modify rawVforkSyscall to have two arguments (which is also required for clone3); - remove the arguments workaround from s390 asm, instead implementing arguments swap in the caller (which still looks ugly but at least it's done once and is clearly documented now); - use rawVforkSyscall for all cases (since it is essentially similar to RawSyscall6, except for having less parameters, not returning r2, and saving/restoring the return address before/after syscall on 386 and amd64). Updates #51246. Change-Id: Ifcd418ebead9257177338ffbcccd0bdecb94474e Reviewed-on: https://go-review.googlesource.com/c/go/+/417695 Auto-Submit: Ian Lance Taylor <iant@google.com> Reviewed-by: Michael Knyszek <mknyszek@google.com> Reviewed-by: Ian Lance Taylor <iant@google.com> Run-TryBot: Ian Lance Taylor <iant@google.com> Run-TryBot: Kirill Kolyshkin <kolyshkin@gmail.com> TryBot-Result: Gopher Robot <gobot@golang.org>
73 lines
4.8 KiB
Plaintext
73 lines
4.8 KiB
Plaintext
pkg syscall (linux-386), const CLONE_CLEAR_SIGHAND = 4294967296 #51246
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pkg syscall (linux-386), const CLONE_CLEAR_SIGHAND ideal-int #51246
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pkg syscall (linux-386), const CLONE_INTO_CGROUP = 8589934592 #51246
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pkg syscall (linux-386), const CLONE_INTO_CGROUP ideal-int #51246
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pkg syscall (linux-386), const CLONE_NEWCGROUP = 33554432 #51246
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pkg syscall (linux-386), const CLONE_NEWCGROUP ideal-int #51246
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pkg syscall (linux-386), const CLONE_NEWTIME = 128 #51246
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pkg syscall (linux-386), const CLONE_NEWTIME ideal-int #51246
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pkg syscall (linux-386), const CLONE_PIDFD = 4096 #51246
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pkg syscall (linux-386), const CLONE_PIDFD ideal-int #51246
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pkg syscall (linux-386), type SysProcAttr struct, CgroupFD int #51246
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pkg syscall (linux-386), type SysProcAttr struct, UseCgroupFD bool #51246
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pkg syscall (linux-386-cgo), const CLONE_CLEAR_SIGHAND = 4294967296 #51246
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pkg syscall (linux-386-cgo), const CLONE_CLEAR_SIGHAND ideal-int #51246
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pkg syscall (linux-386-cgo), const CLONE_INTO_CGROUP = 8589934592 #51246
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pkg syscall (linux-386-cgo), const CLONE_INTO_CGROUP ideal-int #51246
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pkg syscall (linux-386-cgo), const CLONE_NEWCGROUP = 33554432 #51246
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pkg syscall (linux-386-cgo), const CLONE_NEWCGROUP ideal-int #51246
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pkg syscall (linux-386-cgo), const CLONE_NEWTIME = 128 #51246
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pkg syscall (linux-386-cgo), const CLONE_NEWTIME ideal-int #51246
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pkg syscall (linux-386-cgo), const CLONE_PIDFD = 4096 #51246
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pkg syscall (linux-386-cgo), const CLONE_PIDFD ideal-int #51246
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pkg syscall (linux-386-cgo), type SysProcAttr struct, CgroupFD int #51246
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pkg syscall (linux-386-cgo), type SysProcAttr struct, UseCgroupFD bool #51246
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pkg syscall (linux-amd64), const CLONE_CLEAR_SIGHAND = 4294967296 #51246
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pkg syscall (linux-amd64), const CLONE_CLEAR_SIGHAND ideal-int #51246
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pkg syscall (linux-amd64), const CLONE_INTO_CGROUP = 8589934592 #51246
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pkg syscall (linux-amd64), const CLONE_INTO_CGROUP ideal-int #51246
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pkg syscall (linux-amd64), const CLONE_NEWCGROUP = 33554432 #51246
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pkg syscall (linux-amd64), const CLONE_NEWCGROUP ideal-int #51246
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pkg syscall (linux-amd64), const CLONE_NEWTIME = 128 #51246
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pkg syscall (linux-amd64), const CLONE_NEWTIME ideal-int #51246
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pkg syscall (linux-amd64), const CLONE_PIDFD = 4096 #51246
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pkg syscall (linux-amd64), const CLONE_PIDFD ideal-int #51246
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pkg syscall (linux-amd64), type SysProcAttr struct, CgroupFD int #51246
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pkg syscall (linux-amd64), type SysProcAttr struct, UseCgroupFD bool #51246
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pkg syscall (linux-amd64-cgo), const CLONE_CLEAR_SIGHAND = 4294967296 #51246
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pkg syscall (linux-amd64-cgo), const CLONE_CLEAR_SIGHAND ideal-int #51246
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pkg syscall (linux-amd64-cgo), const CLONE_INTO_CGROUP = 8589934592 #51246
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pkg syscall (linux-amd64-cgo), const CLONE_INTO_CGROUP ideal-int #51246
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pkg syscall (linux-amd64-cgo), const CLONE_NEWCGROUP = 33554432 #51246
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pkg syscall (linux-amd64-cgo), const CLONE_NEWCGROUP ideal-int #51246
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pkg syscall (linux-amd64-cgo), const CLONE_NEWTIME = 128 #51246
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pkg syscall (linux-amd64-cgo), const CLONE_NEWTIME ideal-int #51246
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pkg syscall (linux-amd64-cgo), const CLONE_PIDFD = 4096 #51246
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pkg syscall (linux-amd64-cgo), const CLONE_PIDFD ideal-int #51246
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pkg syscall (linux-amd64-cgo), type SysProcAttr struct, CgroupFD int #51246
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pkg syscall (linux-amd64-cgo), type SysProcAttr struct, UseCgroupFD bool #51246
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pkg syscall (linux-arm), const CLONE_CLEAR_SIGHAND = 4294967296 #51246
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pkg syscall (linux-arm), const CLONE_CLEAR_SIGHAND ideal-int #51246
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pkg syscall (linux-arm), const CLONE_INTO_CGROUP = 8589934592 #51246
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pkg syscall (linux-arm), const CLONE_INTO_CGROUP ideal-int #51246
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pkg syscall (linux-arm), const CLONE_NEWCGROUP = 33554432 #51246
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pkg syscall (linux-arm), const CLONE_NEWCGROUP ideal-int #51246
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pkg syscall (linux-arm), const CLONE_NEWTIME = 128 #51246
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pkg syscall (linux-arm), const CLONE_NEWTIME ideal-int #51246
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pkg syscall (linux-arm), const CLONE_PIDFD = 4096 #51246
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pkg syscall (linux-arm), const CLONE_PIDFD ideal-int #51246
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pkg syscall (linux-arm), type SysProcAttr struct, CgroupFD int #51246
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pkg syscall (linux-arm), type SysProcAttr struct, UseCgroupFD bool #51246
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pkg syscall (linux-arm-cgo), const CLONE_CLEAR_SIGHAND = 4294967296 #51246
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pkg syscall (linux-arm-cgo), const CLONE_CLEAR_SIGHAND ideal-int #51246
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pkg syscall (linux-arm-cgo), const CLONE_INTO_CGROUP = 8589934592 #51246
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pkg syscall (linux-arm-cgo), const CLONE_INTO_CGROUP ideal-int #51246
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pkg syscall (linux-arm-cgo), const CLONE_NEWCGROUP = 33554432 #51246
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pkg syscall (linux-arm-cgo), const CLONE_NEWCGROUP ideal-int #51246
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pkg syscall (linux-arm-cgo), const CLONE_NEWTIME = 128 #51246
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pkg syscall (linux-arm-cgo), const CLONE_NEWTIME ideal-int #51246
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pkg syscall (linux-arm-cgo), const CLONE_PIDFD = 4096 #51246
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pkg syscall (linux-arm-cgo), const CLONE_PIDFD ideal-int #51246
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pkg syscall (linux-arm-cgo), type SysProcAttr struct, CgroupFD int #51246
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pkg syscall (linux-arm-cgo), type SysProcAttr struct, UseCgroupFD bool #51246
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