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syscall: implement rawVforkSyscall for remaining linux platforms

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This allows the use of CLONE_VFORK and CLONE_VM for fork/exec, preventing
'fork/exec ...: cannot allocate memory' failures from occuring when attempting
to execute commands from a Go process that has a large memory footprint.
Additionally, this should reduce the latency of fork/exec on these platforms.

Fixes #31936

Change-Id: I4e28cf0763173145cacaa5340680dca9ff449305
Reviewed-on: https://go-review.googlesource.com/c/go/+/295849
Trust: Joel Sing <joel@sing.id.au>
Run-TryBot: Joel Sing <joel@sing.id.au>
Reviewed-by: Cherry Zhang <cherryyz@google.com>
This commit is contained in:
Joel Sing 2019-05-07 17:56:49 +10:00
parent f2df1e3c34
commit 00cb841b83
11 changed files with 84 additions and 21 deletions
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4
src/syscall/syscall_linux_386.go
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@ -387,6 +387,4 @@ func (cmsg *Cmsghdr) SetLen(length int) {
cmsg.Len = uint32(length)
}
func rawVforkSyscall(trap, a1 uintptr) (r1 uintptr, err Errno) {
panic("not implemented")
}
func rawVforkSyscall(trap, a1 uintptr) (r1 uintptr, err Errno)