Zachary Anderson
d0295c873c
Fuchsia requires the ability to sandbox Isolates w.r.t. file IO. When a new Isolate starts, Fuchsia will pass the Isolate an object called a namespace. We can translate the namespace object into a file descriptor suitable for passing to the *at() family of POSIX file system calls. The file system calls will then have visibility only into the specified namespace. We also plumb Namespaces through on all the other platforms as well to make the change easier to test and so that in the future we can implement e.g. per-isolate cwds. This change adds a new internal class to dart:io called _Namespace, which is implemented in a patch file. See: sdk/lib/io/namespace_impl.dart runtime/bin/namespace_patch.dart The embedder can set up a non-default namespace by calling _Namespace._setupNamespace during Isolate setup. Instances of _Namespace have a native field that holds a pointer to a native Namespace object. See: runtime/bin/namespace.h Calls from e.g. file_impl.dart are now also passed a _Namespace object. The implementations in e.g. file.cc and file_linux.cc then extract the namespace, and use it to compute a file descriptor and path suitable for passing to e.g. openat(). related US-313 R=asiva@google.com, rmacnak@google.com Review-Url: https://codereview.chromium.org/3007703002 .
66 lines
2.2 KiB
Dart
66 lines
2.2 KiB
Dart
// Copyright (c) 2012, the Dart project authors. Please see the AUTHORS file
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// for details. All rights reserved. Use of this source code is governed by a
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// BSD-style license that can be found in the LICENSE file.
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@patch
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class _Directory {
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@patch
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static _current(_Namespace namespace) native "Directory_Current";
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@patch
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static _setCurrent(_Namespace namespace, path) native "Directory_SetCurrent";
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@patch
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static _createTemp(_Namespace namespace, String path)
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native "Directory_CreateTemp";
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@patch
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static String _systemTemp(_Namespace namespace) native "Directory_SystemTemp";
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@patch
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static _exists(_Namespace namespace, String path) native "Directory_Exists";
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@patch
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static _create(_Namespace namespace, String path) native "Directory_Create";
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@patch
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static _deleteNative(_Namespace namespace, String path, bool recursive)
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native "Directory_Delete";
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@patch
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static _rename(_Namespace namespace, String path, String newPath)
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native "Directory_Rename";
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@patch
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static void _fillWithDirectoryListing(
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_Namespace namespace,
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List<FileSystemEntity> list,
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String path,
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bool recursive,
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bool followLinks) native "Directory_FillWithDirectoryListing";
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}
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@patch
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class _AsyncDirectoryListerOps {
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@patch
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factory _AsyncDirectoryListerOps(int pointer) =>
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new _AsyncDirectoryListerOpsImpl(pointer);
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}
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class _AsyncDirectoryListerOpsImpl extends NativeFieldWrapperClass1
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implements _AsyncDirectoryListerOps {
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_AsyncDirectoryListerOpsImpl._();
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factory _AsyncDirectoryListerOpsImpl(int pointer) =>
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new _AsyncDirectoryListerOpsImpl._().._setPointer(pointer);
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void _setPointer(int pointer)
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native "Directory_SetAsyncDirectoryListerPointer";
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int getPointer() native "Directory_GetAsyncDirectoryListerPointer";
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}
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// Corelib 'Uri.base' implementation.
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// Uri.base is susceptible to changes in the current working directory.
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Uri _uriBaseClosure() {
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var result = _Directory._current(_Namespace._namespace);
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if (result is OSError) {
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throw new FileSystemException(
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"Getting current working directory failed", "", result);
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}
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return new Uri.directory(result);
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}
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_getUriBaseClosure() => _uriBaseClosure;
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