Move //pkg/sentry/memutil to //pkg/memutil.

PiperOrigin-RevId: 252124156

8 files changed, 5 insertions, 74 deletions

diff --git a/pkg/sentry/context/contexttest/BUILD b/pkg/sentry/context/contexttest/BUILD
index ce4f1e42c..d17b1bdcf 100644
--- a/pkg/sentry/context/contexttest/BUILD
+++ b/pkg/sentry/context/contexttest/BUILD
@@ -9,11 +9,11 @@ go_library(
     importpath = "gvisor.googlesource.com/gvisor/pkg/sentry/context/contexttest",
     visibility = ["//pkg/sentry:internal"],
     deps = [
+        "//pkg/memutil",
         "//pkg/sentry/context",
         "//pkg/sentry/kernel/auth",
         "//pkg/sentry/kernel/time",
         "//pkg/sentry/limits",
-        "//pkg/sentry/memutil",
         "//pkg/sentry/pgalloc",
         "//pkg/sentry/platform",
         "//pkg/sentry/platform/ptrace",
diff --git a/pkg/sentry/context/contexttest/contexttest.go b/pkg/sentry/context/contexttest/contexttest.go
index 210a235d2..83da40711 100644
--- a/pkg/sentry/context/contexttest/contexttest.go
+++ b/pkg/sentry/context/contexttest/contexttest.go
@@ -21,11 +21,11 @@ import (
 	"testing"
 	"time"
 
+	"gvisor.googlesource.com/gvisor/pkg/memutil"
 	"gvisor.googlesource.com/gvisor/pkg/sentry/context"
 	"gvisor.googlesource.com/gvisor/pkg/sentry/kernel/auth"
 	ktime "gvisor.googlesource.com/gvisor/pkg/sentry/kernel/time"
 	"gvisor.googlesource.com/gvisor/pkg/sentry/limits"
-	"gvisor.googlesource.com/gvisor/pkg/sentry/memutil"
 	"gvisor.googlesource.com/gvisor/pkg/sentry/pgalloc"
 	"gvisor.googlesource.com/gvisor/pkg/sentry/platform"
 	"gvisor.googlesource.com/gvisor/pkg/sentry/platform/ptrace"
diff --git a/pkg/sentry/memutil/BUILD b/pkg/sentry/memutil/BUILD
deleted file mode 100644
index 68b03d4cc..000000000
--- a/pkg/sentry/memutil/BUILD
+++ /dev/null
@@ -1,14 +0,0 @@
-load("//tools/go_stateify:defs.bzl", "go_library")
-
-package(licenses = ["notice"])
-
-go_library(
-    name = "memutil",
-    srcs = [
-        "memutil.go",
-        "memutil_unsafe.go",
-    ],
-    importpath = "gvisor.googlesource.com/gvisor/pkg/sentry/memutil",
-    visibility = ["//pkg/sentry:internal"],
-    deps = ["@org_golang_x_sys//unix:go_default_library"],
-)
diff --git a/pkg/sentry/memutil/memutil.go b/pkg/sentry/memutil/memutil.go
deleted file mode 100644
index a4154c42a..000000000
--- a/pkg/sentry/memutil/memutil.go
+++ /dev/null
@@ -1,16 +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 memutil contains the utility functions for memory operations.
-package memutil
diff --git a/pkg/sentry/memutil/memutil_unsafe.go b/pkg/sentry/memutil/memutil_unsafe.go
deleted file mode 100644
index 92eab8a26..000000000
--- a/pkg/sentry/memutil/memutil_unsafe.go
+++ /dev/null
@@ -1,39 +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 memutil
-
-import (
-	"fmt"
-	"syscall"
-	"unsafe"
-
-	"golang.org/x/sys/unix"
-)
-
-// CreateMemFD creates a memfd file and returns the fd.
-func CreateMemFD(name string, flags int) (int, error) {
-	p, err := syscall.BytePtrFromString(name)
-	if err != nil {
-		return -1, err
-	}
-	fd, _, e := syscall.Syscall(unix.SYS_MEMFD_CREATE, uintptr(unsafe.Pointer(p)), uintptr(flags), 0)
-	if e != 0 {
-		if e == syscall.ENOSYS {
-			return -1, fmt.Errorf("memfd_create(2) is not implemented. Check that you have Linux 3.17 or higher")
-		}
-		return -1, e
-	}
-	return int(fd), nil
-}
diff --git a/pkg/sentry/pgalloc/BUILD b/pkg/sentry/pgalloc/BUILD
index bbdb1f922..ca2d5ba6f 100644
--- a/pkg/sentry/pgalloc/BUILD
+++ b/pkg/sentry/pgalloc/BUILD
@@ -63,10 +63,10 @@ go_library(
     visibility = ["//pkg/sentry:internal"],
     deps = [
         "//pkg/log",
+        "//pkg/memutil",
         "//pkg/sentry/arch",
         "//pkg/sentry/context",
         "//pkg/sentry/hostmm",
-        "//pkg/sentry/memutil",
         "//pkg/sentry/platform",
         "//pkg/sentry/safemem",
         "//pkg/sentry/usage",
diff --git a/pkg/sentry/usage/BUILD b/pkg/sentry/usage/BUILD
index 09198496b..860733061 100644
--- a/pkg/sentry/usage/BUILD
+++ b/pkg/sentry/usage/BUILD
@@ -17,6 +17,6 @@ go_library(
     ],
     deps = [
         "//pkg/bits",
-        "//pkg/sentry/memutil",
+        "//pkg/memutil",
     ],
 )
diff --git a/pkg/sentry/usage/memory.go b/pkg/sentry/usage/memory.go
index c316f1597..9ed974ccb 100644
--- a/pkg/sentry/usage/memory.go
+++ b/pkg/sentry/usage/memory.go
@@ -22,7 +22,7 @@ import (
 	"syscall"
 
 	"gvisor.googlesource.com/gvisor/pkg/bits"
-	"gvisor.googlesource.com/gvisor/pkg/sentry/memutil"
+	"gvisor.googlesource.com/gvisor/pkg/memutil"
 )
 
 // MemoryKind represents a type of memory used by the application.