diff --git a/unix/export_mremap_test.go b/unix/export_mremap_test.go new file mode 100644 index 000000000..1c235c2c3 --- /dev/null +++ b/unix/export_mremap_test.go @@ -0,0 +1,13 @@ +// Copyright 2023 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. + +//go:build linux || netbsd +// +build linux netbsd + +package unix + +const ( + MremapFixed = mremapFixed + MremapMaymove = mremapMaymove +) diff --git a/unix/mmap_nomremap.go b/unix/mmap_nomremap.go new file mode 100644 index 000000000..ca0513632 --- /dev/null +++ b/unix/mmap_nomremap.go @@ -0,0 +1,14 @@ +// Copyright 2023 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. + +//go:build aix || darwin || dragonfly || freebsd || openbsd || solaris +// +build aix darwin dragonfly freebsd openbsd solaris + +package unix + +var mapper = &mmapper{ + active: make(map[*byte][]byte), + mmap: mmap, + munmap: munmap, +} diff --git a/unix/mremap.go b/unix/mremap.go index 86213c05d..fa93d0aa9 100644 --- a/unix/mremap.go +++ b/unix/mremap.go @@ -2,8 +2,8 @@ // Use of this source code is governed by a BSD-style // license that can be found in the LICENSE file. -//go:build linux -// +build linux +//go:build linux || netbsd +// +build linux netbsd package unix @@ -14,8 +14,17 @@ type mremapMmapper struct { mremap func(oldaddr uintptr, oldlength uintptr, newlength uintptr, flags int, newaddr uintptr) (xaddr uintptr, err error) } +var mapper = &mremapMmapper{ + mmapper: mmapper{ + active: make(map[*byte][]byte), + mmap: mmap, + munmap: munmap, + }, + mremap: mremap, +} + func (m *mremapMmapper) Mremap(oldData []byte, newLength int, flags int) (data []byte, err error) { - if newLength <= 0 || len(oldData) == 0 || len(oldData) != cap(oldData) || flags&MREMAP_FIXED != 0 { + if newLength <= 0 || len(oldData) == 0 || len(oldData) != cap(oldData) || flags&mremapFixed != 0 { return nil, EINVAL } @@ -32,9 +41,13 @@ func (m *mremapMmapper) Mremap(oldData []byte, newLength int, flags int) (data [ } bNew := unsafe.Slice((*byte)(unsafe.Pointer(newAddr)), newLength) pNew := &bNew[cap(bNew)-1] - if flags&MREMAP_DONTUNMAP == 0 { + if flags&mremapDontunmap == 0 { delete(m.active, pOld) } m.active[pNew] = bNew return bNew, nil } + +func Mremap(oldData []byte, newLength int, flags int) (data []byte, err error) { + return mapper.Mremap(oldData, newLength, flags) +} diff --git a/unix/mremap_test.go b/unix/mremap_test.go index 7b1655b81..40d4f60dc 100644 --- a/unix/mremap_test.go +++ b/unix/mremap_test.go @@ -2,8 +2,8 @@ // Use of this source code is governed by a BSD-style // license that can be found in the LICENSE file. -//go:build linux -// +build linux +//go:build linux || netbsd +// +build linux netbsd package unix_test @@ -24,7 +24,7 @@ func TestMremap(t *testing.T) { b[0] = 42 - bNew, err := unix.Mremap(b, unix.Getpagesize()*2, unix.MREMAP_MAYMOVE) + bNew, err := unix.Mremap(b, unix.Getpagesize()*2, unix.MremapMaymove) if err != nil { t.Fatalf("Mremap2: %v", err) } @@ -40,8 +40,8 @@ func TestMremap(t *testing.T) { t.Fatal("new memory cap not equal to specified len") } - _, err = unix.Mremap(b, unix.Getpagesize(), unix.MREMAP_FIXED) + _, err = unix.Mremap(b, unix.Getpagesize(), unix.MremapFixed) if err != unix.EINVAL { - t.Fatalf("unix.MREMAP_FIXED should be forbidden") + t.Fatalf("remapping to a fixed address; got %v, want %v", err, unix.EINVAL) } } diff --git a/unix/syscall_aix.go b/unix/syscall_aix.go index c406ae00f..9a6e5acac 100644 --- a/unix/syscall_aix.go +++ b/unix/syscall_aix.go @@ -535,21 +535,6 @@ func Fsync(fd int) error { //sys sendmsg(s int, msg *Msghdr, flags int) (n int, err error) = nsendmsg //sys munmap(addr uintptr, length uintptr) (err error) - -var mapper = &mmapper{ - active: make(map[*byte][]byte), - mmap: mmap, - munmap: munmap, -} - -func Mmap(fd int, offset int64, length int, prot int, flags int) (data []byte, err error) { - return mapper.Mmap(fd, offset, length, prot, flags) -} - -func Munmap(b []byte) (err error) { - return mapper.Munmap(b) -} - //sys Madvise(b []byte, advice int) (err error) //sys Mprotect(b []byte, prot int) (err error) //sys Mlock(b []byte) (err error) diff --git a/unix/syscall_bsd.go b/unix/syscall_bsd.go index 7705c3270..4217de518 100644 --- a/unix/syscall_bsd.go +++ b/unix/syscall_bsd.go @@ -601,20 +601,6 @@ func Poll(fds []PollFd, timeout int) (n int, err error) { // Gethostuuid(uuid *byte, timeout *Timespec) (err error) // Ptrace(req int, pid int, addr uintptr, data int) (ret uintptr, err error) -var mapper = &mmapper{ - active: make(map[*byte][]byte), - mmap: mmap, - munmap: munmap, -} - -func Mmap(fd int, offset int64, length int, prot int, flags int) (data []byte, err error) { - return mapper.Mmap(fd, offset, length, prot, flags) -} - -func Munmap(b []byte) (err error) { - return mapper.Munmap(b) -} - //sys Madvise(b []byte, behav int) (err error) //sys Mlock(b []byte) (err error) //sys Mlockall(flags int) (err error) diff --git a/unix/syscall_linux.go b/unix/syscall_linux.go index 39de5f143..332a74b8e 100644 --- a/unix/syscall_linux.go +++ b/unix/syscall_linux.go @@ -2125,28 +2125,6 @@ func writevRacedetect(iovecs []Iovec, n int) { // mmap varies by architecture; see syscall_linux_*.go. //sys munmap(addr uintptr, length uintptr) (err error) //sys mremap(oldaddr uintptr, oldlength uintptr, newlength uintptr, flags int, newaddr uintptr) (xaddr uintptr, err error) - -var mapper = &mremapMmapper{ - mmapper: mmapper{ - active: make(map[*byte][]byte), - mmap: mmap, - munmap: munmap, - }, - mremap: mremap, -} - -func Mmap(fd int, offset int64, length int, prot int, flags int) (data []byte, err error) { - return mapper.Mmap(fd, offset, length, prot, flags) -} - -func Munmap(b []byte) (err error) { - return mapper.Munmap(b) -} - -func Mremap(oldData []byte, newLength int, flags int) (data []byte, err error) { - return mapper.Mremap(oldData, newLength, flags) -} - //sys Madvise(b []byte, advice int) (err error) //sys Mprotect(b []byte, prot int) (err error) //sys Mlock(b []byte) (err error) @@ -2155,6 +2133,12 @@ func Mremap(oldData []byte, newLength int, flags int) (data []byte, err error) { //sys Munlock(b []byte) (err error) //sys Munlockall() (err error) +const ( + mremapFixed = MREMAP_FIXED + mremapDontunmap = MREMAP_DONTUNMAP + mremapMaymove = MREMAP_MAYMOVE +) + // Vmsplice splices user pages from a slice of Iovecs into a pipe specified by fd, // using the specified flags. func Vmsplice(fd int, iovs []Iovec, flags int) (int, error) { diff --git a/unix/syscall_netbsd.go b/unix/syscall_netbsd.go index 018d7d478..ddd1ac853 100644 --- a/unix/syscall_netbsd.go +++ b/unix/syscall_netbsd.go @@ -360,6 +360,18 @@ func Statvfs(path string, buf *Statvfs_t) (err error) { //sys writelen(fd int, buf *byte, nbuf int) (n int, err error) = SYS_WRITE //sys utimensat(dirfd int, path string, times *[2]Timespec, flags int) (err error) +const ( + mremapFixed = MAP_FIXED + mremapDontunmap = 0 + mremapMaymove = 0 +) + +//sys mremapNetBSD(oldp uintptr, oldsize uintptr, newp uintptr, newsize uintptr, flags int) (xaddr uintptr, err error) = SYS_MREMAP + +func mremap(oldaddr uintptr, oldlength uintptr, newlength uintptr, flags int, newaddr uintptr) (uintptr, error) { + return mremapNetBSD(oldaddr, oldlength, newaddr, newlength, flags) +} + /* * Unimplemented */ @@ -564,7 +576,6 @@ func Statvfs(path string, buf *Statvfs_t) (err error) { // mq_timedreceive // mq_timedsend // mq_unlink -// mremap // msgget // msgrcv // msgsnd diff --git a/unix/syscall_solaris.go b/unix/syscall_solaris.go index b600a289d..72d23575f 100644 --- a/unix/syscall_solaris.go +++ b/unix/syscall_solaris.go @@ -716,20 +716,6 @@ func writelen(fd int, buf *byte, nbuf int) (n int, err error) { return } -var mapper = &mmapper{ - active: make(map[*byte][]byte), - mmap: mmap, - munmap: munmap, -} - -func Mmap(fd int, offset int64, length int, prot int, flags int) (data []byte, err error) { - return mapper.Mmap(fd, offset, length, prot, flags) -} - -func Munmap(b []byte) (err error) { - return mapper.Munmap(b) -} - // Event Ports type fileObjCookie struct { diff --git a/unix/syscall_unix.go b/unix/syscall_unix.go index 8e48c29ec..8bb30e7ce 100644 --- a/unix/syscall_unix.go +++ b/unix/syscall_unix.go @@ -147,6 +147,14 @@ func (m *mmapper) Munmap(data []byte) (err error) { return nil } +func Mmap(fd int, offset int64, length int, prot int, flags int) (data []byte, err error) { + return mapper.Mmap(fd, offset, length, prot, flags) +} + +func Munmap(b []byte) (err error) { + return mapper.Munmap(b) +} + func Read(fd int, p []byte) (n int, err error) { n, err = read(fd, p) if raceenabled { diff --git a/unix/syscall_zos_s390x.go b/unix/syscall_zos_s390x.go index d3d49ec3e..44e72edb4 100644 --- a/unix/syscall_zos_s390x.go +++ b/unix/syscall_zos_s390x.go @@ -285,25 +285,11 @@ func Close(fd int) (err error) { return } -var mapper = &mmapper{ - active: make(map[*byte][]byte), - mmap: mmap, - munmap: munmap, -} - // Dummy function: there are no semantics for Madvise on z/OS func Madvise(b []byte, advice int) (err error) { return } -func Mmap(fd int, offset int64, length int, prot int, flags int) (data []byte, err error) { - return mapper.Mmap(fd, offset, length, prot, flags) -} - -func Munmap(b []byte) (err error) { - return mapper.Munmap(b) -} - //sys Gethostname(buf []byte) (err error) = SYS___GETHOSTNAME_A //sysnb Getegid() (egid int) //sysnb Geteuid() (uid int) diff --git a/unix/zsyscall_netbsd_386.go b/unix/zsyscall_netbsd_386.go index cdb2af5ae..35f499b32 100644 --- a/unix/zsyscall_netbsd_386.go +++ b/unix/zsyscall_netbsd_386.go @@ -1858,3 +1858,14 @@ func utimensat(dirfd int, path string, times *[2]Timespec, flags int) (err error } return } + +// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT + +func mremapNetBSD(oldp uintptr, oldsize uintptr, newp uintptr, newsize uintptr, flags int) (xaddr uintptr, err error) { + r0, _, e1 := Syscall6(SYS_MREMAP, uintptr(oldp), uintptr(oldsize), uintptr(newp), uintptr(newsize), uintptr(flags), 0) + xaddr = uintptr(r0) + if e1 != 0 { + err = errnoErr(e1) + } + return +} diff --git a/unix/zsyscall_netbsd_amd64.go b/unix/zsyscall_netbsd_amd64.go index 9d25f76b0..3cda65b0d 100644 --- a/unix/zsyscall_netbsd_amd64.go +++ b/unix/zsyscall_netbsd_amd64.go @@ -1858,3 +1858,14 @@ func utimensat(dirfd int, path string, times *[2]Timespec, flags int) (err error } return } + +// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT + +func mremapNetBSD(oldp uintptr, oldsize uintptr, newp uintptr, newsize uintptr, flags int) (xaddr uintptr, err error) { + r0, _, e1 := Syscall6(SYS_MREMAP, uintptr(oldp), uintptr(oldsize), uintptr(newp), uintptr(newsize), uintptr(flags), 0) + xaddr = uintptr(r0) + if e1 != 0 { + err = errnoErr(e1) + } + return +} diff --git a/unix/zsyscall_netbsd_arm.go b/unix/zsyscall_netbsd_arm.go index d3f803516..1e1fea902 100644 --- a/unix/zsyscall_netbsd_arm.go +++ b/unix/zsyscall_netbsd_arm.go @@ -1858,3 +1858,14 @@ func utimensat(dirfd int, path string, times *[2]Timespec, flags int) (err error } return } + +// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT + +func mremapNetBSD(oldp uintptr, oldsize uintptr, newp uintptr, newsize uintptr, flags int) (xaddr uintptr, err error) { + r0, _, e1 := Syscall6(SYS_MREMAP, uintptr(oldp), uintptr(oldsize), uintptr(newp), uintptr(newsize), uintptr(flags), 0) + xaddr = uintptr(r0) + if e1 != 0 { + err = errnoErr(e1) + } + return +} diff --git a/unix/zsyscall_netbsd_arm64.go b/unix/zsyscall_netbsd_arm64.go index 887188a52..3b77da110 100644 --- a/unix/zsyscall_netbsd_arm64.go +++ b/unix/zsyscall_netbsd_arm64.go @@ -1858,3 +1858,14 @@ func utimensat(dirfd int, path string, times *[2]Timespec, flags int) (err error } return } + +// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT + +func mremapNetBSD(oldp uintptr, oldsize uintptr, newp uintptr, newsize uintptr, flags int) (xaddr uintptr, err error) { + r0, _, e1 := Syscall6(SYS_MREMAP, uintptr(oldp), uintptr(oldsize), uintptr(newp), uintptr(newsize), uintptr(flags), 0) + xaddr = uintptr(r0) + if e1 != 0 { + err = errnoErr(e1) + } + return +}