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syscall: use unsafe.Pointer in BSD kevent

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Doesn't really matter for the most part, since the runtime-integrated
network poller uses its own kevent implementation, but for people using
the syscall directly, we should use an unsafe.Pointer for the precise GC
to retain the pointer arguments.

Also push down unsafe.Pointer a bit further in exec_linux.go, not
that there are any GC preemption points in the middle and sys
is still live anyway.

R=golang-codereviews, dvyukov
CC=golang-codereviews, iant
https://golang.org/cl/55520043
This commit is contained in:
Brad Fitzpatrick 2014-01-22 10:35:41 -08:00
parent b7b93a7154
commit ba8c92c166
14 changed files with 67 additions and 77 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

6
src/pkg/syscall/exec_linux.go
View File

@ -131,11 +131,11 @@ func forkAndExecInChild(argv0 *byte, argv, envv []*byte, chroot, dir *byte, attr
// User and groups
if cred := sys.Credential; cred != nil {
ngroups := uintptr(len(cred.Groups))
groups := uintptr(0)
var groups unsafe.Pointer
if ngroups > 0 {
groups = uintptr(unsafe.Pointer(&cred.Groups[0]))
groups = unsafe.Pointer(&cred.Groups[0])
}
_, _, err1 = RawSyscall(SYS_SETGROUPS, ngroups, groups, 0)
_, _, err1 = RawSyscall(SYS_SETGROUPS, ngroups, uintptr(groups), 0)
if err1 != 0 {
goto childerror
}

8
src/pkg/syscall/syscall_bsd.go
View File

@ -426,15 +426,15 @@ func Sendmsg(fd int, p, oob []byte, to Sockaddr, flags int) (err error) {
return
}
//sys kevent(kq int, change uintptr, nchange int, event uintptr, nevent int, timeout *Timespec) (n int, err error)
//sys kevent(kq int, change unsafe.Pointer, nchange int, event unsafe.Pointer, nevent int, timeout *Timespec) (n int, err error)
func Kevent(kq int, changes, events []Kevent_t, timeout *Timespec) (n int, err error) {
var change, event uintptr
var change, event unsafe.Pointer
if len(changes) > 0 {
change = uintptr(unsafe.Pointer(&changes[0]))
change = unsafe.Pointer(&changes[0])
}
if len(events) > 0 {
event = uintptr(unsafe.Pointer(&events[0]))
event = unsafe.Pointer(&events[0])
}
return kevent(kq, change, len(changes), event, len(events), timeout)
}

2
src/pkg/syscall/zsyscall_darwin_386.go
View File

@ -195,7 +195,7 @@ func sendmsg(s int, msg *Msghdr, flags int) (err error) {
// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
func kevent(kq int, change uintptr, nchange int, event uintptr, nevent int, timeout *Timespec) (n int, err error) {
func kevent(kq int, change unsafe.Pointer, nchange int, event unsafe.Pointer, nevent int, timeout *Timespec) (n int, err error) {
r0, _, e1 := Syscall6(SYS_KEVENT, uintptr(kq), uintptr(change), uintptr(nchange), uintptr(event), uintptr(nevent), uintptr(unsafe.Pointer(timeout)))
n = int(r0)
if e1 != 0 {

2
src/pkg/syscall/zsyscall_darwin_amd64.go
View File

@ -195,7 +195,7 @@ func sendmsg(s int, msg *Msghdr, flags int) (err error) {
// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
func kevent(kq int, change uintptr, nchange int, event uintptr, nevent int, timeout *Timespec) (n int, err error) {
func kevent(kq int, change unsafe.Pointer, nchange int, event unsafe.Pointer, nevent int, timeout *Timespec) (n int, err error) {
r0, _, e1 := Syscall6(SYS_KEVENT, uintptr(kq), uintptr(change), uintptr(nchange), uintptr(event), uintptr(nevent), uintptr(unsafe.Pointer(timeout)))
n = int(r0)
if e1 != 0 {

2
src/pkg/syscall/zsyscall_dragonfly_386.go
View File

@ -195,7 +195,7 @@ func sendmsg(s int, msg *Msghdr, flags int) (err error) {
// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
func kevent(kq int, change uintptr, nchange int, event uintptr, nevent int, timeout *Timespec) (n int, err error) {
func kevent(kq int, change unsafe.Pointer, nchange int, event unsafe.Pointer, nevent int, timeout *Timespec) (n int, err error) {
r0, _, e1 := Syscall6(SYS_KEVENT, uintptr(kq), uintptr(change), uintptr(nchange), uintptr(event), uintptr(nevent), uintptr(unsafe.Pointer(timeout)))
n = int(r0)
if e1 != 0 {

2
src/pkg/syscall/zsyscall_dragonfly_amd64.go
View File

@ -195,7 +195,7 @@ func sendmsg(s int, msg *Msghdr, flags int) (err error) {
// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
func kevent(kq int, change uintptr, nchange int, event uintptr, nevent int, timeout *Timespec) (n int, err error) {
func kevent(kq int, change unsafe.Pointer, nchange int, event unsafe.Pointer, nevent int, timeout *Timespec) (n int, err error) {
r0, _, e1 := Syscall6(SYS_KEVENT, uintptr(kq), uintptr(change), uintptr(nchange), uintptr(event), uintptr(nevent), uintptr(unsafe.Pointer(timeout)))
n = int(r0)
if e1 != 0 {

2
src/pkg/syscall/zsyscall_freebsd_386.go
View File

@ -195,7 +195,7 @@ func sendmsg(s int, msg *Msghdr, flags int) (err error) {
// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
func kevent(kq int, change uintptr, nchange int, event uintptr, nevent int, timeout *Timespec) (n int, err error) {
func kevent(kq int, change unsafe.Pointer, nchange int, event unsafe.Pointer, nevent int, timeout *Timespec) (n int, err error) {
r0, _, e1 := Syscall6(SYS_KEVENT, uintptr(kq), uintptr(change), uintptr(nchange), uintptr(event), uintptr(nevent), uintptr(unsafe.Pointer(timeout)))
n = int(r0)
if e1 != 0 {

2
src/pkg/syscall/zsyscall_freebsd_amd64.go
View File

@ -195,7 +195,7 @@ func sendmsg(s int, msg *Msghdr, flags int) (err error) {
// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
func kevent(kq int, change uintptr, nchange int, event uintptr, nevent int, timeout *Timespec) (n int, err error) {
func kevent(kq int, change unsafe.Pointer, nchange int, event unsafe.Pointer, nevent int, timeout *Timespec) (n int, err error) {
r0, _, e1 := Syscall6(SYS_KEVENT, uintptr(kq), uintptr(change), uintptr(nchange), uintptr(event), uintptr(nevent), uintptr(unsafe.Pointer(timeout)))
n = int(r0)
if e1 != 0 {

89
src/pkg/syscall/zsyscall_freebsd_arm.go
View File

@ -50,7 +50,7 @@ func accept(s int, rsa *RawSockaddrAny, addrlen *_Socklen) (fd int, err error) {
// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
func bind(s int, addr uintptr, addrlen _Socklen) (err error) {
func bind(s int, addr unsafe.Pointer, addrlen _Socklen) (err error) {
_, _, e1 := Syscall(SYS_BIND, uintptr(s), uintptr(addr), uintptr(addrlen))
if e1 != 0 {
err = e1
@ -60,7 +60,7 @@ func bind(s int, addr uintptr, addrlen _Socklen) (err error) {
// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
func connect(s int, addr uintptr, addrlen _Socklen) (err error) {
func connect(s int, addr unsafe.Pointer, addrlen _Socklen) (err error) {
_, _, e1 := Syscall(SYS_CONNECT, uintptr(s), uintptr(addr), uintptr(addrlen))
if e1 != 0 {
err = e1
@ -81,7 +81,7 @@ func socket(domain int, typ int, proto int) (fd int, err error) {
// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
func getsockopt(s int, level int, name int, val uintptr, vallen *_Socklen) (err error) {
func getsockopt(s int, level int, name int, val unsafe.Pointer, vallen *_Socklen) (err error) {
_, _, e1 := Syscall6(SYS_GETSOCKOPT, uintptr(s), uintptr(level), uintptr(name), uintptr(val), uintptr(unsafe.Pointer(vallen)), 0)
if e1 != 0 {
err = e1
@ -91,7 +91,7 @@ func getsockopt(s int, level int, name int, val uintptr, vallen *_Socklen) (err
// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
func setsockopt(s int, level int, name int, val uintptr, vallen uintptr) (err error) {
func setsockopt(s int, level int, name int, val unsafe.Pointer, vallen uintptr) (err error) {
_, _, e1 := Syscall6(SYS_SETSOCKOPT, uintptr(s), uintptr(level), uintptr(name), uintptr(val), uintptr(vallen), 0)
if e1 != 0 {
err = e1
@ -158,7 +158,7 @@ func recvfrom(fd int, p []byte, flags int, from *RawSockaddrAny, fromlen *_Sockl
// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
func sendto(s int, buf []byte, flags int, to uintptr, addrlen _Socklen) (err error) {
func sendto(s int, buf []byte, flags int, to unsafe.Pointer, addrlen _Socklen) (err error) {
var _p0 unsafe.Pointer
if len(buf) > 0 {
_p0 = unsafe.Pointer(&buf[0])
@ -195,7 +195,7 @@ func sendmsg(s int, msg *Msghdr, flags int) (err error) {
// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
func kevent(kq int, change uintptr, nchange int, event uintptr, nevent int, timeout *Timespec) (n int, err error) {
func kevent(kq int, change unsafe.Pointer, nchange int, event unsafe.Pointer, nevent int, timeout *Timespec) (n int, err error) {
r0, _, e1 := Syscall6(SYS_KEVENT, uintptr(kq), uintptr(change), uintptr(nchange), uintptr(event), uintptr(nevent), uintptr(unsafe.Pointer(timeout)))
n = int(r0)
if e1 != 0 {
@ -418,13 +418,8 @@ func Fchdir(fd int) (err error) {
// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
func Fchflags(path string, flags int) (err error) {
var _p0 *byte
_p0, err = BytePtrFromString(path)
if err != nil {
return
}
_, _, e1 := Syscall(SYS_FCHFLAGS, uintptr(unsafe.Pointer(_p0)), uintptr(flags), 0)
func Fchflags(fd int, flags int) (err error) {
_, _, e1 := Syscall(SYS_FCHFLAGS, uintptr(fd), uintptr(flags), 0)
if e1 != 0 {
err = e1
}
@ -885,6 +880,23 @@ func Pwrite(fd int, p []byte, offset int64) (n int, err error) {
// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
func read(fd int, p []byte) (n int, err error) {
var _p0 unsafe.Pointer
if len(p) > 0 {
_p0 = unsafe.Pointer(&p[0])
} else {
_p0 = unsafe.Pointer(&_zero)
}
r0, _, e1 := Syscall(SYS_READ, uintptr(fd), uintptr(_p0), uintptr(len(p)))
n = int(r0)
if e1 != 0 {
err = e1
}
return
}
// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
func Readlink(path string, buf []byte) (n int, err error) {
var _p0 *byte
_p0, err = BytePtrFromString(path)
@ -1232,6 +1244,23 @@ func Unmount(path string, flags int) (err error) {
// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
func write(fd int, p []byte) (n int, err error) {
var _p0 unsafe.Pointer
if len(p) > 0 {
_p0 = unsafe.Pointer(&p[0])
} else {
_p0 = unsafe.Pointer(&_zero)
}
r0, _, e1 := Syscall(SYS_WRITE, uintptr(fd), uintptr(_p0), uintptr(len(p)))
n = int(r0)
if e1 != 0 {
err = e1
}
return
}
// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
func mmap(addr uintptr, length uintptr, prot int, flag int, fd int, pos int64) (ret uintptr, err error) {
r0, _, e1 := Syscall9(SYS_MMAP, uintptr(addr), uintptr(length), uintptr(prot), uintptr(flag), uintptr(fd), uintptr(pos), uintptr(pos>>32), 0, 0)
ret = uintptr(r0)
@ -1253,40 +1282,6 @@ func munmap(addr uintptr, length uintptr) (err error) {
// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
func read(fd int, p []byte) (n int, err error) {
var _p0 unsafe.Pointer
if len(p) > 0 {
_p0 = unsafe.Pointer(&p[0])
} else {
_p0 = unsafe.Pointer(&_zero)
}
r0, _, e1 := Syscall(SYS_READ, uintptr(fd), uintptr(_p0), uintptr(len(p)))
n = int(r0)
if e1 != 0 {
err = e1
}
return
}
// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
func write(fd int, p []byte) (n int, err error) {
var _p0 unsafe.Pointer
if len(p) > 0 {
_p0 = unsafe.Pointer(&p[0])
} else {
_p0 = unsafe.Pointer(&_zero)
}
r0, _, e1 := Syscall(SYS_WRITE, uintptr(fd), uintptr(_p0), uintptr(len(p)))
n = int(r0)
if e1 != 0 {
err = e1
}
return
}
// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
func readlen(fd int, buf *byte, nbuf int) (n int, err error) {
r0, _, e1 := Syscall(SYS_READ, uintptr(fd), uintptr(unsafe.Pointer(buf)), uintptr(nbuf))
n = int(r0)

2
src/pkg/syscall/zsyscall_netbsd_386.go
View File

@ -195,7 +195,7 @@ func sendmsg(s int, msg *Msghdr, flags int) (err error) {
// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
func kevent(kq int, change uintptr, nchange int, event uintptr, nevent int, timeout *Timespec) (n int, err error) {
func kevent(kq int, change unsafe.Pointer, nchange int, event unsafe.Pointer, nevent int, timeout *Timespec) (n int, err error) {
r0, _, e1 := Syscall6(SYS_KEVENT, uintptr(kq), uintptr(change), uintptr(nchange), uintptr(event), uintptr(nevent), uintptr(unsafe.Pointer(timeout)))
n = int(r0)
if e1 != 0 {

2
src/pkg/syscall/zsyscall_netbsd_amd64.go
View File

@ -195,7 +195,7 @@ func sendmsg(s int, msg *Msghdr, flags int) (err error) {
// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
func kevent(kq int, change uintptr, nchange int, event uintptr, nevent int, timeout *Timespec) (n int, err error) {
func kevent(kq int, change unsafe.Pointer, nchange int, event unsafe.Pointer, nevent int, timeout *Timespec) (n int, err error) {
r0, _, e1 := Syscall6(SYS_KEVENT, uintptr(kq), uintptr(change), uintptr(nchange), uintptr(event), uintptr(nevent), uintptr(unsafe.Pointer(timeout)))
n = int(r0)
if e1 != 0 {

21
src/pkg/syscall/zsyscall_netbsd_arm.go
View File

@ -50,7 +50,7 @@ func accept(s int, rsa *RawSockaddrAny, addrlen *_Socklen) (fd int, err error) {
// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
func bind(s int, addr uintptr, addrlen _Socklen) (err error) {
func bind(s int, addr unsafe.Pointer, addrlen _Socklen) (err error) {
_, _, e1 := Syscall(SYS_BIND, uintptr(s), uintptr(addr), uintptr(addrlen))
if e1 != 0 {
err = e1
@ -60,7 +60,7 @@ func bind(s int, addr uintptr, addrlen _Socklen) (err error) {
// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
func connect(s int, addr uintptr, addrlen _Socklen) (err error) {
func connect(s int, addr unsafe.Pointer, addrlen _Socklen) (err error) {
_, _, e1 := Syscall(SYS_CONNECT, uintptr(s), uintptr(addr), uintptr(addrlen))
if e1 != 0 {
err = e1
@ -81,7 +81,7 @@ func socket(domain int, typ int, proto int) (fd int, err error) {
// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
func getsockopt(s int, level int, name int, val uintptr, vallen *_Socklen) (err error) {
func getsockopt(s int, level int, name int, val unsafe.Pointer, vallen *_Socklen) (err error) {
_, _, e1 := Syscall6(SYS_GETSOCKOPT, uintptr(s), uintptr(level), uintptr(name), uintptr(val), uintptr(unsafe.Pointer(vallen)), 0)
if e1 != 0 {
err = e1
@ -91,7 +91,7 @@ func getsockopt(s int, level int, name int, val uintptr, vallen *_Socklen) (err
// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
func setsockopt(s int, level int, name int, val uintptr, vallen uintptr) (err error) {
func setsockopt(s int, level int, name int, val unsafe.Pointer, vallen uintptr) (err error) {
_, _, e1 := Syscall6(SYS_SETSOCKOPT, uintptr(s), uintptr(level), uintptr(name), uintptr(val), uintptr(vallen), 0)
if e1 != 0 {
err = e1
@ -158,7 +158,7 @@ func recvfrom(fd int, p []byte, flags int, from *RawSockaddrAny, fromlen *_Sockl
// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
func sendto(s int, buf []byte, flags int, to uintptr, addrlen _Socklen) (err error) {
func sendto(s int, buf []byte, flags int, to unsafe.Pointer, addrlen _Socklen) (err error) {
var _p0 unsafe.Pointer
if len(buf) > 0 {
_p0 = unsafe.Pointer(&buf[0])
@ -195,7 +195,7 @@ func sendmsg(s int, msg *Msghdr, flags int) (err error) {
// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
func kevent(kq int, change uintptr, nchange int, event uintptr, nevent int, timeout *Timespec) (n int, err error) {
func kevent(kq int, change unsafe.Pointer, nchange int, event unsafe.Pointer, nevent int, timeout *Timespec) (n int, err error) {
r0, _, e1 := Syscall6(SYS_KEVENT, uintptr(kq), uintptr(change), uintptr(nchange), uintptr(event), uintptr(nevent), uintptr(unsafe.Pointer(timeout)))
n = int(r0)
if e1 != 0 {
@ -435,13 +435,8 @@ func Fchdir(fd int) (err error) {
// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
func Fchflags(path string, flags int) (err error) {
var _p0 *byte
_p0, err = BytePtrFromString(path)
if err != nil {
return
}
_, _, e1 := Syscall(SYS_FCHFLAGS, uintptr(unsafe.Pointer(_p0)), uintptr(flags), 0)
func Fchflags(fd int, flags int) (err error) {
_, _, e1 := Syscall(SYS_FCHFLAGS, uintptr(fd), uintptr(flags), 0)
if e1 != 0 {
err = e1
}

2
src/pkg/syscall/zsyscall_openbsd_386.go
View File

@ -195,7 +195,7 @@ func sendmsg(s int, msg *Msghdr, flags int) (err error) {
// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
func kevent(kq int, change uintptr, nchange int, event uintptr, nevent int, timeout *Timespec) (n int, err error) {
func kevent(kq int, change unsafe.Pointer, nchange int, event unsafe.Pointer, nevent int, timeout *Timespec) (n int, err error) {
r0, _, e1 := Syscall6(SYS_KEVENT, uintptr(kq), uintptr(change), uintptr(nchange), uintptr(event), uintptr(nevent), uintptr(unsafe.Pointer(timeout)))
n = int(r0)
if e1 != 0 {

2
src/pkg/syscall/zsyscall_openbsd_amd64.go
View File

@ -195,7 +195,7 @@ func sendmsg(s int, msg *Msghdr, flags int) (err error) {
// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
func kevent(kq int, change uintptr, nchange int, event uintptr, nevent int, timeout *Timespec) (n int, err error) {
func kevent(kq int, change unsafe.Pointer, nchange int, event unsafe.Pointer, nevent int, timeout *Timespec) (n int, err error) {
r0, _, e1 := Syscall6(SYS_KEVENT, uintptr(kq), uintptr(change), uintptr(nchange), uintptr(event), uintptr(nevent), uintptr(unsafe.Pointer(timeout)))
n = int(r0)
if e1 != 0 {