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mirror of https://github.com/golang/go synced 2024-11-21 13:54:43 -07:00

gc: unsafe.Alignof, unsafe.Offsetof, unsafe.Sizeof now return uintptr

R=ken2
CC=golang-dev
https://golang.org/cl/4640045
This commit is contained in:
Russ Cox 2011-06-17 16:12:14 -04:00
parent b96ff8458c
commit cf9f380499
24 changed files with 66 additions and 42 deletions

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@ -103,9 +103,9 @@ char *unsafeimport =
"package unsafe\n"
"import runtime \"runtime\"\n"
"type \"\".Pointer uintptr\n"
"func \"\".Offsetof (? any) int\n"
"func \"\".Sizeof (? any) int\n"
"func \"\".Alignof (? any) int\n"
"func \"\".Offsetof (? any) uintptr\n"
"func \"\".Sizeof (? any) uintptr\n"
"func \"\".Alignof (? any) uintptr\n"
"func \"\".Typeof (i interface { }) interface { }\n"
"func \"\".Reflect (i interface { }) (typ interface { }, addr \"\".Pointer)\n"
"func \"\".Unreflect (typ interface { }, addr \"\".Pointer) interface { }\n"

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@ -92,6 +92,6 @@ ret:
mpmovecfix(val.u.xval, v);
n = nod(OLITERAL, N, N);
n->val = val;
n->type = types[TINT];
n->type = types[TUINTPTR];
return n;
}

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@ -10,9 +10,11 @@ package PACKAGE
type Pointer uintptr // not really; filled in by compiler
func Offsetof(any) int
func Sizeof(any) int
func Alignof(any) int
// return types here are ignored; see unsafe.c
func Offsetof(any) uintptr
func Sizeof(any) uintptr
func Alignof(any) uintptr
func Typeof(i interface{}) (typ interface{})
func Reflect(i interface{}) (typ interface{}, addr Pointer)
func Unreflect(typ interface{}, addr Pointer) (ret interface{})

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@ -367,7 +367,7 @@ func decComplex64(i *decInstr, state *decoderState, p unsafe.Pointer) {
p = *(*unsafe.Pointer)(p)
}
storeFloat32(i, state, p)
storeFloat32(i, state, unsafe.Pointer(uintptr(p)+uintptr(unsafe.Sizeof(float32(0)))))
storeFloat32(i, state, unsafe.Pointer(uintptr(p)+unsafe.Sizeof(float32(0))))
}
// decComplex128 decodes a pair of unsigned integers, treats them as a

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@ -11,7 +11,7 @@ import (
"unsafe"
)
const uint64Size = unsafe.Sizeof(uint64(0))
const uint64Size = int(unsafe.Sizeof(uint64(0)))
// encoderState is the global execution state of an instance of the encoder.
// Field numbers are delta encoded and always increase. The field

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@ -11,7 +11,6 @@ import (
"encoding/binary"
"hash"
"os"
"unsafe"
)
type (
@ -102,31 +101,31 @@ func (s *sum64a) Write(data []byte) (int, os.Error) {
return len(data), nil
}
func (s *sum32) Size() int { return unsafe.Sizeof(*s) }
func (s *sum32a) Size() int { return unsafe.Sizeof(*s) }
func (s *sum64) Size() int { return unsafe.Sizeof(*s) }
func (s *sum64a) Size() int { return unsafe.Sizeof(*s) }
func (s *sum32) Size() int { return 4 }
func (s *sum32a) Size() int { return 4 }
func (s *sum64) Size() int { return 8 }
func (s *sum64a) Size() int { return 8 }
func (s *sum32) Sum() []byte {
a := make([]byte, unsafe.Sizeof(*s))
a := make([]byte, 4)
binary.BigEndian.PutUint32(a, uint32(*s))
return a
}
func (s *sum32a) Sum() []byte {
a := make([]byte, unsafe.Sizeof(*s))
a := make([]byte, 4)
binary.BigEndian.PutUint32(a, uint32(*s))
return a
}
func (s *sum64) Sum() []byte {
a := make([]byte, unsafe.Sizeof(*s))
a := make([]byte, 8)
binary.BigEndian.PutUint64(a, uint64(*s))
return a
}
func (s *sum64a) Sum() []byte {
a := make([]byte, unsafe.Sizeof(*s))
a := make([]byte, 8)
binary.BigEndian.PutUint64(a, uint64(*s))
return a
}

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@ -827,7 +827,7 @@ func (t *commonType) runtimeType() *runtime.Type {
i runtime.Type
ct commonType
}
return (*runtime.Type)(unsafe.Pointer(uintptr(unsafe.Pointer(t)) - uintptr(unsafe.Offsetof(rt.ct))))
return (*runtime.Type)(unsafe.Pointer(uintptr(unsafe.Pointer(t)) - unsafe.Offsetof(rt.ct)))
}
// PtrTo returns the pointer type with element t.
@ -888,7 +888,7 @@ func PtrTo(t Type) Type {
p.uncommonType = nil
p.ptrToThis = nil
p.elem = (*runtime.Type)(unsafe.Pointer(uintptr(unsafe.Pointer(ct)) - uintptr(unsafe.Offsetof(rt.ptrType))))
p.elem = (*runtime.Type)(unsafe.Pointer(uintptr(unsafe.Pointer(ct)) - unsafe.Offsetof(rt.ptrType)))
ptrMap.m[ct] = p
ptrMap.Unlock()

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@ -11,7 +11,7 @@ import (
"unsafe"
)
const ptrSize = uintptr(unsafe.Sizeof((*byte)(nil)))
const ptrSize = unsafe.Sizeof((*byte)(nil))
const cannotSet = "cannot set value obtained from unexported struct field"
// TODO: This will have to go away when

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@ -229,7 +229,7 @@ runtime·allocmcache(void)
return c;
}
int32 runtime·sizeof_C_MStats = sizeof(MStats);
uintptr runtime·sizeof_C_MStats = sizeof(MStats);
#define MaxArena32 (2U<<30)

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@ -52,7 +52,7 @@ type MemStatsType struct {
}
}
var sizeof_C_MStats int // filled in by malloc.goc
var sizeof_C_MStats uintptr // filled in by malloc.goc
func init() {
if sizeof_C_MStats != unsafe.Sizeof(MemStats) {

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@ -43,7 +43,7 @@ func TestCPUProfile(t *testing.T) {
// Convert []byte to []uintptr.
bytes := prof.Bytes()
val := *(*[]uintptr)(unsafe.Pointer(&bytes))
val = val[:len(bytes)/unsafe.Sizeof(uintptr(0))]
val = val[:len(bytes)/int(unsafe.Sizeof(uintptr(0)))]
if len(val) < 10 {
t.Fatalf("profile too short: %#x", val)

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@ -249,7 +249,7 @@ func forkAndExecInChild(argv0 *byte, argv, envv []*byte, chroot, dir *byte, attr
childerror:
// send error code on pipe
RawSyscall(SYS_WRITE, uintptr(pipe), uintptr(unsafe.Pointer(&err1)), uintptr(unsafe.Sizeof(err1)))
RawSyscall(SYS_WRITE, uintptr(pipe), uintptr(unsafe.Pointer(&err1)), unsafe.Sizeof(err1))
for {
RawSyscall(SYS_EXIT, 253, 0, 0)
}
@ -343,10 +343,10 @@ func forkExec(argv0 string, argv []string, attr *ProcAttr) (pid int, err int) {
// Read child error status from pipe.
Close(p[1])
n, err = read(p[0], (*byte)(unsafe.Pointer(&err1)), unsafe.Sizeof(err1))
n, err = read(p[0], (*byte)(unsafe.Pointer(&err1)), int(unsafe.Sizeof(err1)))
Close(p[0])
if err != 0 || n != 0 {
if n == unsafe.Sizeof(err1) {
if n == int(unsafe.Sizeof(err1)) {
err = int(err1)
}
if err == 0 {

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@ -155,7 +155,7 @@ func Sleep(ns int64) (errno int) {
//sys connect(s int, addr uintptr, addrlen _Socklen) (errno int)
//sysnb socket(domain int, typ int, proto int) (fd int, errno int)
//sys getsockopt(s int, level int, name int, val uintptr, vallen *_Socklen) (errno int)
//sys setsockopt(s int, level int, name int, val uintptr, vallen int) (errno int)
//sys setsockopt(s int, level int, name int, val uintptr, vallen uintptr) (errno int)
//sysnb getpeername(fd int, rsa *RawSockaddrAny, addrlen *_Socklen) (errno int)
//sysnb getsockname(fd int, rsa *RawSockaddrAny, addrlen *_Socklen) (errno int)
//sys Shutdown(s int, how int) (errno int)
@ -451,7 +451,7 @@ func Kevent(kq int, changes, events []Kevent_t, timeout *Timespec) (n int, errno
// Translate "kern.hostname" to []_C_int{0,1,2,3}.
func nametomib(name string) (mib []_C_int, errno int) {
const siz = uintptr(unsafe.Sizeof(mib[0]))
const siz = unsafe.Sizeof(mib[0])
// NOTE(rsc): It seems strange to set the buffer to have
// size CTL_MAXNAME+2 but use only CTL_MAXNAME

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@ -472,7 +472,7 @@ func SetsockoptIPv6Mreq(fd, level, opt int, mreq *IPv6Mreq) (errno int) {
}
func SetsockoptString(fd, level, opt int, s string) (errno int) {
return setsockopt(fd, level, opt, uintptr(unsafe.Pointer(&[]byte(s)[0])), len(s))
return setsockopt(fd, level, opt, uintptr(unsafe.Pointer(&[]byte(s)[0])), uintptr(len(s)))
}
func Recvfrom(fd int, p []byte, flags int) (n int, from Sockaddr, errno int) {

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@ -146,8 +146,8 @@ func getsockopt(s int, level int, name int, val uintptr, vallen *_Socklen) (errn
return
}
func setsockopt(s int, level int, name int, val uintptr, vallen int) (errno int) {
_, errno = socketcall(_SETSOCKOPT, uintptr(s), uintptr(level), uintptr(name), uintptr(val), uintptr(vallen), 0)
func setsockopt(s int, level int, name int, val uintptr, vallen uintptr) (errno int) {
_, errno = socketcall(_SETSOCKOPT, uintptr(s), uintptr(level), uintptr(name), val, vallen, 0)
return
}
@ -190,13 +190,13 @@ func Shutdown(s, how int) (errno int) {
}
func Fstatfs(fd int, buf *Statfs_t) (errno int) {
_, _, e1 := Syscall(SYS_FSTATFS64, uintptr(fd), uintptr(unsafe.Sizeof(*buf)), uintptr(unsafe.Pointer(buf)))
_, _, e1 := Syscall(SYS_FSTATFS64, uintptr(fd), unsafe.Sizeof(*buf), uintptr(unsafe.Pointer(buf)))
errno = int(e1)
return
}
func Statfs(path string, buf *Statfs_t) (errno int) {
_, _, e1 := Syscall(SYS_STATFS64, uintptr(unsafe.Pointer(StringBytePtr(path))), uintptr(unsafe.Sizeof(*buf)), uintptr(unsafe.Pointer(buf)))
_, _, e1 := Syscall(SYS_STATFS64, uintptr(unsafe.Pointer(StringBytePtr(path))), unsafe.Sizeof(*buf), uintptr(unsafe.Pointer(buf)))
errno = int(e1)
return
}

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@ -42,7 +42,7 @@ package syscall
//sysnb getgroups(n int, list *_Gid_t) (nn int, errno int)
//sysnb setgroups(n int, list *_Gid_t) (errno int)
//sys getsockopt(s int, level int, name int, val uintptr, vallen *_Socklen) (errno int)
//sys setsockopt(s int, level int, name int, val uintptr, vallen int) (errno int)
//sys setsockopt(s int, level int, name int, val uintptr, vallen uintptr) (errno int)
//sysnb socket(domain int, typ int, proto int) (fd int, errno int)
//sysnb socketpair(domain int, typ int, proto int, fd *[2]int) (errno int)
//sysnb getpeername(fd int, rsa *RawSockaddrAny, addrlen *_Socklen) (errno int)

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@ -71,7 +71,7 @@ func Seek(fd int, offset int64, whence int) (newoffset int64, errno int)
//sysnb getgroups(n int, list *_Gid_t) (nn int, errno int) = SYS_GETGROUPS32
//sysnb setgroups(n int, list *_Gid_t) (errno int) = SYS_SETGROUPS32
//sys getsockopt(s int, level int, name int, val uintptr, vallen *_Socklen) (errno int)
//sys setsockopt(s int, level int, name int, val uintptr, vallen int) (errno int)
//sys setsockopt(s int, level int, name int, val uintptr, vallen uintptr) (errno int)
//sysnb socket(domain int, typ int, proto int) (fd int, errno int)
//sysnb getpeername(fd int, rsa *RawSockaddrAny, addrlen *_Socklen) (errno int)
//sysnb getsockname(fd int, rsa *RawSockaddrAny, addrlen *_Socklen) (errno int)

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@ -85,7 +85,7 @@ func getsockopt(s int, level int, name int, val uintptr, vallen *_Socklen) (errn
// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
func setsockopt(s int, level int, name int, val uintptr, vallen int) (errno int) {
func setsockopt(s int, level int, name int, val uintptr, vallen uintptr) (errno int) {
_, _, e1 := Syscall6(SYS_SETSOCKOPT, uintptr(s), uintptr(level), uintptr(name), uintptr(val), uintptr(vallen), 0)
errno = int(e1)
return

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@ -85,7 +85,7 @@ func getsockopt(s int, level int, name int, val uintptr, vallen *_Socklen) (errn
// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
func setsockopt(s int, level int, name int, val uintptr, vallen int) (errno int) {
func setsockopt(s int, level int, name int, val uintptr, vallen uintptr) (errno int) {
_, _, e1 := Syscall6(SYS_SETSOCKOPT, uintptr(s), uintptr(level), uintptr(name), uintptr(val), uintptr(vallen), 0)
errno = int(e1)
return

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@ -85,7 +85,7 @@ func getsockopt(s int, level int, name int, val uintptr, vallen *_Socklen) (errn
// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
func setsockopt(s int, level int, name int, val uintptr, vallen int) (errno int) {
func setsockopt(s int, level int, name int, val uintptr, vallen uintptr) (errno int) {
_, _, e1 := Syscall6(SYS_SETSOCKOPT, uintptr(s), uintptr(level), uintptr(name), uintptr(val), uintptr(vallen), 0)
errno = int(e1)
return

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@ -85,7 +85,7 @@ func getsockopt(s int, level int, name int, val uintptr, vallen *_Socklen) (errn
// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
func setsockopt(s int, level int, name int, val uintptr, vallen int) (errno int) {
func setsockopt(s int, level int, name int, val uintptr, vallen uintptr) (errno int) {
_, _, e1 := Syscall6(SYS_SETSOCKOPT, uintptr(s), uintptr(level), uintptr(name), uintptr(val), uintptr(vallen), 0)
errno = int(e1)
return

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@ -1169,7 +1169,7 @@ func getsockopt(s int, level int, name int, val uintptr, vallen *_Socklen) (errn
// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
func setsockopt(s int, level int, name int, val uintptr, vallen int) (errno int) {
func setsockopt(s int, level int, name int, val uintptr, vallen uintptr) (errno int) {
_, _, e1 := Syscall6(SYS_SETSOCKOPT, uintptr(s), uintptr(level), uintptr(name), uintptr(val), uintptr(vallen), 0)
errno = int(e1)
return

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@ -895,7 +895,7 @@ func getsockopt(s int, level int, name int, val uintptr, vallen *_Socklen) (errn
// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
func setsockopt(s int, level int, name int, val uintptr, vallen int) (errno int) {
func setsockopt(s int, level int, name int, val uintptr, vallen uintptr) (errno int) {
_, _, e1 := Syscall6(SYS_SETSOCKOPT, uintptr(s), uintptr(level), uintptr(name), uintptr(val), uintptr(vallen), 0)
errno = int(e1)
return

23
test/sizeof.go Normal file
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@ -0,0 +1,23 @@
// $G $D/$F.go
// Copyright 2011 The Go Authors. All rights reserved.
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.
package main
import "unsafe"
type T struct {
X int
}
var t T
func isUintptr(uintptr) {}
func main() {
isUintptr(unsafe.Sizeof(t))
isUintptr(unsafe.Alignof(t))
isUintptr(unsafe.Offsetof(t.X))
}