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unix: on linux-arm64, prefer prlimit to {g,s}etrlimit

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Do the same as CL 230339 did for package syscall:

Reportedly some Docker images accept the prlimit64 system call,
used by syscall.prlimit, but prohibit the getrlimit and setrlimit
system calls.

Updates golang/go#38604

Change-Id: I4fc9197d7b037c2f375e50b149701316a36023f3
Reviewed-on: https://go-review.googlesource.com/c/sys/+/230478
Run-TryBot: Tobias Klauser <tobias.klauser@gmail.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org>
This commit is contained in:
Tobias Klauser
2020-04-28 14:40:35 +02:00
committed by Tobias Klauser
parent 29b5707901
commit 3771e69a9a
2 changed files with 22 additions and 4 deletions
Download Patch File Download Diff File Expand all files Collapse all files

22
unix/syscall_linux_arm64.go
View File

@@ -25,7 +25,7 @@ func EpollCreate(size int) (fd int, err error) {
//sysnb Getegid() (egid int)
//sysnb Geteuid() (euid int)
//sysnb Getgid() (gid int)
//sysnb Getrlimit(resource int, rlim *Rlimit) (err error)
//sysnb getrlimit(resource int, rlim *Rlimit) (err error)
//sysnb Getuid() (uid int)
//sys Listen(s int, n int) (err error)
//sys Pread(fd int, p []byte, offset int64) (n int, err error) = SYS_PREAD64
@@ -47,7 +47,7 @@ func Select(nfd int, r *FdSet, w *FdSet, e *FdSet, timeout *Timeval) (n int, err
//sysnb Setregid(rgid int, egid int) (err error)
//sysnb Setresgid(rgid int, egid int, sgid int) (err error)
//sysnb Setresuid(ruid int, euid int, suid int) (err error)
//sysnb Setrlimit(resource int, rlim *Rlimit) (err error)
//sysnb setrlimit(resource int, rlim *Rlimit) (err error)
//sysnb Setreuid(ruid int, euid int) (err error)
//sys Shutdown(fd int, how int) (err error)
//sys Splice(rfd int, roff *int64, wfd int, woff *int64, len int, flags int) (n int64, err error)
@@ -168,6 +168,24 @@ func Pipe2(p []int, flags int) (err error) {
return
}
// Getrlimit prefers the prlimit64 system call. See issue 38604.
func Getrlimit(resource int, rlim *Rlimit) error {
err := prlimit(0, resource, nil, rlim)
if err != ENOSYS {
return err
}
return getrlimit(resource, rlim)
}
// Setrlimit prefers the prlimit64 system call. See issue 38604.
func Setrlimit(resource int, rlim *Rlimit) error {
err := prlimit(0, resource, rlim, nil)
if err != ENOSYS {
return err
}
return setrlimit(resource, rlim)
}
func (r *PtraceRegs) PC() uint64 { return r.Pc }
func (r *PtraceRegs) SetPC(pc uint64) { r.Pc = pc }

4
unix/zsyscall_linux_arm64.go
View File

@@ -151,7 +151,7 @@ func Getgid() (gid int) {
// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
func Getrlimit(resource int, rlim *Rlimit) (err error) {
func getrlimit(resource int, rlim *Rlimit) (err error) {
_, _, e1 := RawSyscall(SYS_GETRLIMIT, uintptr(resource), uintptr(unsafe.Pointer(rlim)), 0)
if e1 != 0 {
err = errnoErr(e1)
@@ -307,7 +307,7 @@ func Setresuid(ruid int, euid int, suid int) (err error) {
// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
func Setrlimit(resource int, rlim *Rlimit) (err error) {
func setrlimit(resource int, rlim *Rlimit) (err error) {
_, _, e1 := RawSyscall(SYS_SETRLIMIT, uintptr(resource), uintptr(unsafe.Pointer(rlim)), 0)
if e1 != 0 {
err = errnoErr(e1)