unix: on linux-arm64, prefer prlimit to {g,s}etrlimit
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>
diff --git a/unix/syscall_linux_arm64.go b/unix/syscall_linux_arm64.go
index 807a0b2..84ff9fa 100644
--- a/unix/syscall_linux_arm64.go
+++ b/unix/syscall_linux_arm64.go
@@ -25,7 +25,7 @@
//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 @@
//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 @@
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 }
diff --git a/unix/zsyscall_linux_arm64.go b/unix/zsyscall_linux_arm64.go
index f0d2890..1b897de 100644
--- a/unix/zsyscall_linux_arm64.go
+++ b/unix/zsyscall_linux_arm64.go
@@ -151,7 +151,7 @@
// 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 @@
// 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)
