Drop ashmem and binder.

These are unfortunately unused and unmaintained. They can be brought back in
the future if need requires it.

PiperOrigin-RevId: 255697132

5 files changed, 0 insertions, 691 deletions

diff --git a/pkg/sentry/fs/ashmem/BUILD b/pkg/sentry/fs/ashmem/BUILD
deleted file mode 100644
index 5b755cec5..000000000
--- a/pkg/sentry/fs/ashmem/BUILD
+++ /dev/null
@@ -1,65 +0,0 @@
-package(licenses = ["notice"])
-
-load("//tools/go_stateify:defs.bzl", "go_library", "go_test")
-load("//tools/go_generics:defs.bzl", "go_template_instance")
-
-go_library(
-    name = "ashmem",
-    srcs = [
-        "area.go",
-        "device.go",
-        "pin_board.go",
-        "uint64_range.go",
-        "uint64_set.go",
-    ],
-    importpath = "gvisor.dev/gvisor/pkg/sentry/fs/ashmem",
-    visibility = ["//pkg/sentry:internal"],
-    deps = [
-        "//pkg/abi/linux",
-        "//pkg/sentry/arch",
-        "//pkg/sentry/context",
-        "//pkg/sentry/fs",
-        "//pkg/sentry/fs/fsutil",
-        "//pkg/sentry/fs/tmpfs",
-        "//pkg/sentry/kernel/time",
-        "//pkg/sentry/memmap",
-        "//pkg/sentry/usage",
-        "//pkg/sentry/usermem",
-        "//pkg/syserror",
-        "//pkg/waiter",
-    ],
-)
-
-go_test(
-    name = "ashmem_test",
-    size = "small",
-    srcs = ["pin_board_test.go"],
-    embed = [":ashmem"],
-    deps = [
-        "//pkg/abi/linux",
-        "//pkg/sentry/usermem",
-    ],
-)
-
-go_template_instance(
-    name = "uint64_range",
-    out = "uint64_range.go",
-    package = "ashmem",
-    template = "//pkg/segment:generic_range",
-    types = {
-        "T": "uint64",
-    },
-)
-
-go_template_instance(
-    name = "uint64_set",
-    out = "uint64_set.go",
-    package = "ashmem",
-    template = "//pkg/segment:generic_set",
-    types = {
-        "Key": "uint64",
-        "Range": "Range",
-        "Value": "noValue",
-        "Functions": "setFunctions",
-    },
-)
diff --git a/pkg/sentry/fs/ashmem/area.go b/pkg/sentry/fs/ashmem/area.go
deleted file mode 100644
index 3b8d6ca89..000000000
--- a/pkg/sentry/fs/ashmem/area.go
+++ /dev/null
@@ -1,308 +0,0 @@
-// Copyright 2018 The gVisor Authors.
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-
-package ashmem
-
-import (
-	"sync"
-
-	"gvisor.dev/gvisor/pkg/abi/linux"
-	"gvisor.dev/gvisor/pkg/sentry/arch"
-	"gvisor.dev/gvisor/pkg/sentry/context"
-	"gvisor.dev/gvisor/pkg/sentry/fs"
-	"gvisor.dev/gvisor/pkg/sentry/fs/fsutil"
-	"gvisor.dev/gvisor/pkg/sentry/fs/tmpfs"
-	"gvisor.dev/gvisor/pkg/sentry/memmap"
-	"gvisor.dev/gvisor/pkg/sentry/usage"
-	"gvisor.dev/gvisor/pkg/sentry/usermem"
-	"gvisor.dev/gvisor/pkg/syserror"
-	"gvisor.dev/gvisor/pkg/waiter"
-)
-
-const (
-	// namePrefix is the name prefix assumed and forced by the Linux implementation.
-	namePrefix = "dev/ashmem"
-
-	// nameLen is the maximum name length.
-	nameLen = 256
-)
-
-// Area implements fs.FileOperations.
-//
-// +stateify savable
-type Area struct {
-	fsutil.FileNoFsync              `state:"nosave"`
-	fsutil.FileNoSplice             `state:"nosave"`
-	fsutil.FileNoopFlush            `state:"nosave"`
-	fsutil.FileNotDirReaddir        `state:"nosave"`
-	fsutil.FileUseInodeUnstableAttr `state:"nosave"`
-	waiter.AlwaysReady              `state:"nosave"`
-
-	ad *Device
-
-	// mu protects fields below.
-	mu        sync.Mutex `state:"nosave"`
-	tmpfsFile *fs.File
-	name      string
-	size      uint64
-	perms     usermem.AccessType
-	pb        *PinBoard
-}
-
-// Release implements fs.FileOperations.Release.
-func (a *Area) Release() {
-	a.mu.Lock()
-	defer a.mu.Unlock()
-	if a.tmpfsFile != nil {
-		a.tmpfsFile.DecRef()
-		a.tmpfsFile = nil
-	}
-}
-
-// Seek implements fs.FileOperations.Seek.
-func (a *Area) Seek(ctx context.Context, file *fs.File, whence fs.SeekWhence, offset int64) (int64, error) {
-	a.mu.Lock()
-	defer a.mu.Unlock()
-	if a.size == 0 {
-		return 0, syserror.EINVAL
-	}
-	if a.tmpfsFile == nil {
-		return 0, syserror.EBADF
-	}
-	return a.tmpfsFile.FileOperations.Seek(ctx, file, whence, offset)
-}
-
-// Read implements fs.FileOperations.Read.
-func (a *Area) Read(ctx context.Context, file *fs.File, dst usermem.IOSequence, offset int64) (int64, error) {
-	a.mu.Lock()
-	defer a.mu.Unlock()
-	if a.size == 0 {
-		return 0, nil
-	}
-	if a.tmpfsFile == nil {
-		return 0, syserror.EBADF
-	}
-	return a.tmpfsFile.FileOperations.Read(ctx, file, dst, offset)
-}
-
-// Write implements fs.FileOperations.Write.
-func (a *Area) Write(ctx context.Context, file *fs.File, src usermem.IOSequence, offset int64) (int64, error) {
-	return 0, syserror.ENOSYS
-}
-
-// ConfigureMMap implements fs.FileOperations.ConfigureMMap.
-func (a *Area) ConfigureMMap(ctx context.Context, file *fs.File, opts *memmap.MMapOpts) error {
-	a.mu.Lock()
-	defer a.mu.Unlock()
-	if a.size == 0 {
-		return syserror.EINVAL
-	}
-
-	if !a.perms.SupersetOf(opts.Perms) {
-		return syserror.EPERM
-	}
-	opts.MaxPerms = opts.MaxPerms.Intersect(a.perms)
-
-	if a.tmpfsFile == nil {
-		tmpfsInodeOps := tmpfs.NewInMemoryFile(ctx, usage.Tmpfs, fs.UnstableAttr{})
-		tmpfsInode := fs.NewInode(ctx, tmpfsInodeOps, fs.NewPseudoMountSource(ctx), fs.StableAttr{})
-		dirent := fs.NewDirent(ctx, tmpfsInode, namePrefix+"/"+a.name)
-		tmpfsFile, err := tmpfsInode.GetFile(ctx, dirent, fs.FileFlags{Read: true, Write: true})
-		// Drop the extra reference on the Dirent.
-		dirent.DecRef()
-
-		if err != nil {
-			return err
-		}
-
-		// Truncate to the size set by ASHMEM_SET_SIZE ioctl.
-		err = tmpfsInodeOps.Truncate(ctx, tmpfsInode, int64(a.size))
-		if err != nil {
-			return err
-		}
-		a.tmpfsFile = tmpfsFile
-		a.pb = NewPinBoard()
-	}
-
-	return a.tmpfsFile.ConfigureMMap(ctx, opts)
-}
-
-// Ioctl implements fs.FileOperations.Ioctl.
-func (a *Area) Ioctl(ctx context.Context, _ *fs.File, io usermem.IO, args arch.SyscallArguments) (uintptr, error) {
-	// Switch on ioctl request.
-	switch args[1].Uint() {
-	case linux.AshmemSetNameIoctl:
-		name, err := usermem.CopyStringIn(ctx, io, args[2].Pointer(), nameLen-1, usermem.IOOpts{
-			AddressSpaceActive: true,
-		})
-		if err != nil {
-			return 0, err
-		}
-
-		a.mu.Lock()
-		defer a.mu.Unlock()
-
-		// Cannot set name for already mapped ashmem.
-		if a.tmpfsFile != nil {
-			return 0, syserror.EINVAL
-		}
-		a.name = name
-		return 0, nil
-
-	case linux.AshmemGetNameIoctl:
-		a.mu.Lock()
-		var local []byte
-		if a.name != "" {
-			nameLen := len([]byte(a.name))
-			local = make([]byte, nameLen, nameLen+1)
-			copy(local, []byte(a.name))
-			local = append(local, 0)
-		} else {
-			nameLen := len([]byte(namePrefix))
-			local = make([]byte, nameLen, nameLen+1)
-			copy(local, []byte(namePrefix))
-			local = append(local, 0)
-		}
-		a.mu.Unlock()
-
-		if _, err := io.CopyOut(ctx, args[2].Pointer(), local, usermem.IOOpts{
-			AddressSpaceActive: true,
-		}); err != nil {
-			return 0, syserror.EFAULT
-		}
-		return 0, nil
-
-	case linux.AshmemSetSizeIoctl:
-		a.mu.Lock()
-		defer a.mu.Unlock()
-
-		// Cannot set size for already mapped ashmem.
-		if a.tmpfsFile != nil {
-			return 0, syserror.EINVAL
-		}
-		a.size = uint64(args[2].SizeT())
-		return 0, nil
-
-	case linux.AshmemGetSizeIoctl:
-		return uintptr(a.size), nil
-
-	case linux.AshmemPinIoctl, linux.AshmemUnpinIoctl, linux.AshmemGetPinStatusIoctl:
-		// Locking and unlocking is ok since once tmpfsFile is set, it won't be nil again
-		// even after unmapping! Unlocking is needed in order to avoid a deadlock on
-		// usermem.CopyObjectIn.
-
-		// Cannot execute pin-related ioctls before mapping.
-		a.mu.Lock()
-		if a.tmpfsFile == nil {
-			a.mu.Unlock()
-			return 0, syserror.EINVAL
-		}
-		a.mu.Unlock()
-
-		var pin linux.AshmemPin
-		_, err := usermem.CopyObjectIn(ctx, io, args[2].Pointer(), &pin, usermem.IOOpts{
-			AddressSpaceActive: true,
-		})
-		if err != nil {
-			return 0, syserror.EFAULT
-		}
-
-		a.mu.Lock()
-		defer a.mu.Unlock()
-		return a.pinOperation(pin, args[1].Uint())
-
-	case linux.AshmemPurgeAllCachesIoctl:
-		return 0, nil
-
-	case linux.AshmemSetProtMaskIoctl:
-		prot := uint64(args[2].ModeT())
-		perms := usermem.AccessType{
-			Read:    prot&linux.PROT_READ != 0,
-			Write:   prot&linux.PROT_WRITE != 0,
-			Execute: prot&linux.PROT_EXEC != 0,
-		}
-
-		a.mu.Lock()
-		defer a.mu.Unlock()
-
-		// Can only narrow prot mask.
-		if !a.perms.SupersetOf(perms) {
-			return 0, syserror.EINVAL
-		}
-
-		// TODO(b/30946773,gvisor.dev/issue/153): If personality flag
-		// READ_IMPLIES_EXEC is set, set PROT_EXEC if PORT_READ is set.
-
-		a.perms = perms
-		return 0, nil
-
-	case linux.AshmemGetProtMaskIoctl:
-		return uintptr(a.perms.Prot()), nil
-	default:
-		// Ioctls irrelevant to Ashmem.
-		return 0, syserror.EINVAL
-	}
-}
-
-// pinOperation should only be called while holding a.mu.
-func (a *Area) pinOperation(pin linux.AshmemPin, op uint32) (uintptr, error) {
-	// Page-align a.size for checks.
-	pageAlignedSize, ok := usermem.Addr(a.size).RoundUp()
-	if !ok {
-		return 0, syserror.EINVAL
-	}
-	// Len 0 means everything onward.
-	if pin.Len == 0 {
-		pin.Len = uint32(pageAlignedSize) - pin.Offset
-	}
-	// Both Offset and Len have to be page-aligned.
-	if pin.Offset%uint32(usermem.PageSize) != 0 {
-		return 0, syserror.EINVAL
-	}
-	if pin.Len%uint32(usermem.PageSize) != 0 {
-		return 0, syserror.EINVAL
-	}
-	// Adding Offset and Len must not cause an uint32 overflow.
-	if end := pin.Offset + pin.Len; end < pin.Offset {
-		return 0, syserror.EINVAL
-	}
-	// Pin range must not exceed a's size.
-	if uint32(pageAlignedSize) < pin.Offset+pin.Len {
-		return 0, syserror.EINVAL
-	}
-	// Handle each operation.
-	r := RangeFromAshmemPin(pin)
-	switch op {
-	case linux.AshmemPinIoctl:
-		if a.pb.PinRange(r) {
-			return linux.AshmemWasPurged, nil
-		}
-		return linux.AshmemNotPurged, nil
-
-	case linux.AshmemUnpinIoctl:
-		// TODO(b/30946773): Implement purge on unpin.
-		a.pb.UnpinRange(r)
-		return 0, nil
-
-	case linux.AshmemGetPinStatusIoctl:
-		if a.pb.RangePinnedStatus(r) {
-			return linux.AshmemIsPinned, nil
-		}
-		return linux.AshmemIsUnpinned, nil
-
-	default:
-		panic("unreachable")
-	}
-
-}
diff --git a/pkg/sentry/fs/ashmem/device.go b/pkg/sentry/fs/ashmem/device.go
deleted file mode 100644
index 776f54abe..000000000
--- a/pkg/sentry/fs/ashmem/device.go
+++ /dev/null
@@ -1,61 +0,0 @@
-// Copyright 2018 The gVisor Authors.
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-
-// Package ashmem implements Android ashmem module (Anonymus Shared Memory).
-package ashmem
-
-import (
-	"gvisor.dev/gvisor/pkg/abi/linux"
-	"gvisor.dev/gvisor/pkg/sentry/context"
-	"gvisor.dev/gvisor/pkg/sentry/fs"
-	"gvisor.dev/gvisor/pkg/sentry/fs/fsutil"
-	"gvisor.dev/gvisor/pkg/sentry/usermem"
-)
-
-// Device implements fs.InodeOperations.
-//
-// +stateify savable
-type Device struct {
-	fsutil.InodeGenericChecker       `state:"nosave"`
-	fsutil.InodeNoExtendedAttributes `state:"nosave"`
-	fsutil.InodeNoopAllocate         `state:"nosave"`
-	fsutil.InodeNoopRelease          `state:"nosave"`
-	fsutil.InodeNoopTruncate         `state:"nosave"`
-	fsutil.InodeNoopWriteOut         `state:"nosave"`
-	fsutil.InodeNotDirectory         `state:"nosave"`
-	fsutil.InodeNotMappable          `state:"nosave"`
-	fsutil.InodeNotSocket            `state:"nosave"`
-	fsutil.InodeNotSymlink           `state:"nosave"`
-	fsutil.InodeVirtual              `state:"nosave"`
-
-	fsutil.InodeSimpleAttributes
-}
-
-var _ fs.InodeOperations = (*Device)(nil)
-
-// NewDevice creates and initializes a Device structure.
-func NewDevice(ctx context.Context, owner fs.FileOwner, fp fs.FilePermissions) *Device {
-	return &Device{
-		InodeSimpleAttributes: fsutil.NewInodeSimpleAttributes(ctx, owner, fp, linux.ANON_INODE_FS_MAGIC),
-	}
-}
-
-// GetFile implements fs.InodeOperations.GetFile.
-func (ad *Device) GetFile(ctx context.Context, d *fs.Dirent, flags fs.FileFlags) (*fs.File, error) {
-	return fs.NewFile(ctx, d, flags, &Area{
-		ad:        ad,
-		tmpfsFile: nil,
-		perms:     usermem.AnyAccess,
-	}), nil
-}
diff --git a/pkg/sentry/fs/ashmem/pin_board.go b/pkg/sentry/fs/ashmem/pin_board.go
deleted file mode 100644
index c5400dd94..000000000
--- a/pkg/sentry/fs/ashmem/pin_board.go
+++ /dev/null
@@ -1,127 +0,0 @@
-// Copyright 2018 The gVisor Authors.
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-
-package ashmem
-
-import "gvisor.dev/gvisor/pkg/abi/linux"
-
-const maxUint64 = ^uint64(0)
-
-// setFunctions implements segment.Functions generated from segment.Functions for
-// uint64 Key and noValue Value. For more information, see the build file and
-// segment set implementation at pkg/segment/set.go.
-type setFunctions struct{}
-
-// noValue is a type of range attached value, which is irrelevant here.
-type noValue struct{}
-
-// MinKey implements segment.Functions.MinKey.
-func (setFunctions) MinKey() uint64 {
-	return 0
-}
-
-// MaxKey implements segment.Functions.MaxKey.
-func (setFunctions) MaxKey() uint64 {
-	return maxUint64
-}
-
-// ClearValue implements segment.Functions.ClearValue.
-func (setFunctions) ClearValue(*noValue) {
-	return
-}
-
-// Merge implements segment.Functions.Merge.
-func (setFunctions) Merge(Range, noValue, Range, noValue) (noValue, bool) {
-	return noValue{}, true
-}
-
-// Split implements segment.Functions.Split.
-func (setFunctions) Split(Range, noValue, uint64) (noValue, noValue) {
-	return noValue{}, noValue{}
-}
-
-// PinBoard represents a set of pinned ranges in ashmem.
-//
-// segment.Set is used for implementation where segments represent
-// ranges of pinned bytes, while gaps represent ranges of unpinned
-// bytes. All ranges are page-aligned.
-//
-// +stateify savable
-type PinBoard struct {
-	Set
-}
-
-// NewPinBoard creates a new pin board with all pages pinned.
-func NewPinBoard() *PinBoard {
-	var pb PinBoard
-	pb.PinRange(Range{0, maxUint64})
-	return &pb
-}
-
-// PinRange pins all pages in the specified range and returns true
-// if there are any newly pinned pages.
-func (pb *PinBoard) PinRange(r Range) bool {
-	pinnedPages := false
-	for gap := pb.LowerBoundGap(r.Start); gap.Ok() && gap.Start() < r.End; {
-		common := gap.Range().Intersect(r)
-		if common.Length() == 0 {
-			gap = gap.NextGap()
-			continue
-		}
-		pinnedPages = true
-		gap = pb.Insert(gap, common, noValue{}).NextGap()
-	}
-	return pinnedPages
-}
-
-// UnpinRange unpins all pages in the specified range.
-func (pb *PinBoard) UnpinRange(r Range) {
-	for seg := pb.LowerBoundSegment(r.Start); seg.Ok() && seg.Start() < r.End; {
-		common := seg.Range().Intersect(r)
-		if common.Length() == 0 {
-			seg = seg.NextSegment()
-			continue
-		}
-		seg = pb.RemoveRange(common).NextSegment()
-	}
-}
-
-// RangePinnedStatus returns false if there's at least one unpinned page in the
-// specified range.
-func (pb *PinBoard) RangePinnedStatus(r Range) bool {
-	for gap := pb.LowerBoundGap(r.Start); gap.Ok() && gap.Start() < r.End; {
-		common := gap.Range().Intersect(r)
-		if common.Length() == 0 {
-			gap = gap.NextGap()
-			continue
-		}
-		return false
-	}
-	return true
-}
-
-// RangeFromAshmemPin converts ashmem's original pin structure
-// to Range.
-func RangeFromAshmemPin(ap linux.AshmemPin) Range {
-	if ap.Len == 0 {
-		return Range{
-			uint64(ap.Offset),
-			maxUint64,
-		}
-	}
-	return Range{
-		uint64(ap.Offset),
-		uint64(ap.Offset) + uint64(ap.Len),
-	}
-}
diff --git a/pkg/sentry/fs/ashmem/pin_board_test.go b/pkg/sentry/fs/ashmem/pin_board_test.go
deleted file mode 100644
index 1ccd38f56..000000000
--- a/pkg/sentry/fs/ashmem/pin_board_test.go
+++ /dev/null
@@ -1,130 +0,0 @@
-// Copyright 2018 The gVisor Authors.
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-
-package ashmem
-
-import (
-	"testing"
-
-	"gvisor.dev/gvisor/pkg/abi/linux"
-	"gvisor.dev/gvisor/pkg/sentry/usermem"
-)
-
-func TestPinBoard(t *testing.T) {
-	pb := NewPinBoard()
-
-	// Confirm that all pages are pinned.
-	if !pb.RangePinnedStatus(RangeFromAshmemPin(linux.AshmemPin{0, 0})) {
-		t.Errorf("RangePinnedStatus(all pages) returned false (unpinned) at start.")
-	}
-
-	// Unpin pages [1, 11) (counting from 0)
-	pb.UnpinRange(RangeFromAshmemPin(linux.AshmemPin{
-		usermem.PageSize,
-		usermem.PageSize * 10,
-	}))
-
-	// Confirm that pages [1, 11) are unpinned and that page 0 and pages
-	// larger than 10 are pinned.
-	pinned := []linux.AshmemPin{
-		{
-			0,
-			usermem.PageSize,
-		}, {
-			usermem.PageSize * 11,
-			0,
-		},
-	}
-
-	for _, pin := range pinned {
-		if !pb.RangePinnedStatus(RangeFromAshmemPin(pin)) {
-			t.Errorf("RangePinnedStatus(AshmemPin{offset (pages): %v, len (pages): %v}) returned false (unpinned).",
-				pin.Offset, pin.Len)
-		}
-	}
-
-	unpinned := []linux.AshmemPin{
-		{
-			usermem.PageSize,
-			usermem.PageSize * 10,
-		},
-	}
-
-	for _, pin := range unpinned {
-		if pb.RangePinnedStatus(RangeFromAshmemPin(pin)) {
-			t.Errorf("RangePinnedStatus(AshmemPin{offset (pages): %v, len (pages): %v}) returned true (pinned).",
-				pin.Offset, pin.Len)
-		}
-	}
-
-	// Pin pages [2, 6).
-	pb.PinRange(RangeFromAshmemPin(linux.AshmemPin{
-		usermem.PageSize * 2,
-		usermem.PageSize * 4,
-	}))
-
-	// Confirm that pages 0, [2, 6) and pages larger than 10 are pinned
-	// while others remain unpinned.
-	pinned = []linux.AshmemPin{
-		{
-			0,
-			usermem.PageSize,
-		},
-		{
-			usermem.PageSize * 2,
-			usermem.PageSize * 4,
-		},
-		{
-			usermem.PageSize * 11,
-			0,
-		},
-	}
-
-	for _, pin := range pinned {
-		if !pb.RangePinnedStatus(RangeFromAshmemPin(pin)) {
-			t.Errorf("RangePinnedStatus(AshmemPin{offset (pages): %v, len (pages): %v}) returned false (unpinned).",
-				pin.Offset, pin.Len)
-		}
-	}
-
-	unpinned = []linux.AshmemPin{
-		{
-			usermem.PageSize,
-			usermem.PageSize,
-		}, {
-			usermem.PageSize * 6,
-			usermem.PageSize * 5,
-		},
-	}
-
-	for _, pin := range unpinned {
-		if pb.RangePinnedStatus(RangeFromAshmemPin(pin)) {
-			t.Errorf("RangePinnedStatus(AshmemPin{offset (pages): %v, len (pages): %v}) returned true (pinned).",
-				pin.Offset, pin.Len)
-		}
-	}
-
-	// Status of a partially pinned range is unpinned.
-	if pb.RangePinnedStatus(RangeFromAshmemPin(linux.AshmemPin{0, 0})) {
-		t.Errorf("RangePinnedStatus(all pages) returned true (pinned).")
-	}
-
-	// Pin the whole range again.
-	pb.PinRange(RangeFromAshmemPin(linux.AshmemPin{0, 0}))
-
-	// Confirm that all pages are pinned.
-	if !pb.RangePinnedStatus(RangeFromAshmemPin(linux.AshmemPin{0, 0})) {
-		t.Errorf("RangePinnedStatus(all pages) returned false (unpinned) at start.")
-	}
-}