Robert Nystrom
e4c8b49dcc
Change-Id: I1362ada67a02b0ed352612fc29c727e94d8cd254 Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/394901 Commit-Queue: Daco Harkes <dacoharkes@google.com> Auto-Submit: Bob Nystrom <rnystrom@google.com> Reviewed-by: Daco Harkes <dacoharkes@google.com>
97 lines
2.6 KiB
Dart
97 lines
2.6 KiB
Dart
// Copyright (c) 2019, 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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import 'dart:ffi';
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import 'dart:io';
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import 'package:ffi/ffi.dart';
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const arm = 'arm';
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const arm64 = 'arm64';
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const ia32 = 'ia32';
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const x64 = 'x64';
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// https://stackoverflow.com/questions/45125516/possible-values-for-uname-m
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final _unames = {
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'arm': arm,
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'arm64': arm64,
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'aarch64_be': arm64,
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'aarch64': arm64,
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'armv8b': arm64,
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'armv8l': arm64,
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'i386': ia32,
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'i686': ia32,
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'x86_64': x64,
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};
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String _checkRunningMode(String architecture) {
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// Check if we're running in 32bit mode.
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final int pointerSize = sizeOf<IntPtr>();
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if (pointerSize == 4 && architecture == x64) return ia32;
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if (pointerSize == 4 && architecture == arm64) return arm;
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return architecture;
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}
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String _architecture() {
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final String uname = Process.runSync('uname', ['-m']).stdout.trim();
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final String? architecture = _unames[uname];
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if (architecture == null) {
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throw Exception('Unrecognized architecture: "$uname"');
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}
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// Check if we're running in 32bit mode.
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return _checkRunningMode(architecture);
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}
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String _platformPath(String name, String path) {
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if (Platform.isMacOS || Platform.isIOS) {
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return '${path}mac/${_architecture()}/lib$name.dylib';
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}
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if (Platform.isWindows) {
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return '${path}win/${_checkRunningMode(x64)}/$name.dll';
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}
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// Unknown platforms default to Unix implementation.
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return '${path}linux/${_architecture()}/lib$name.so';
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}
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DynamicLibrary dlopenPlatformSpecific(String name, {String path = ''}) {
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final String fullPath = _platformPath(name, path);
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return DynamicLibrary.open(fullPath);
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}
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/// On Linux and Android.
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const RTLD_LAZY = 0x00001;
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/// On Android Arm.
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const RTLD_GLOBAL_android_arm32 = 0x00002;
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/// On Linux and Android Arm64.
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const RTLD_GLOBAL_rest = 0x00100;
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final RTLD_GLOBAL =
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Abi.current() == Abi.androidArm
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? RTLD_GLOBAL_android_arm32
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: RTLD_GLOBAL_rest;
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@Native<Pointer<Void> Function(Pointer<Char>, Int)>()
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external Pointer<Void> dlopen(Pointer<Char> file, int mode);
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Object dlopenGlobalPlatformSpecific(String name, {String path = ''}) {
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if (Platform.isLinux || Platform.isAndroid) {
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// TODO(https://dartbug.com/50105): enable dlopen global via package:ffi.
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return using((arena) {
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final dylibHandle = dlopen(
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_platformPath(name, path).toNativeUtf8(allocator: arena).cast(),
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RTLD_LAZY | RTLD_GLOBAL,
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);
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return dylibHandle;
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});
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}
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return dlopenPlatformSpecific(name, path: path);
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}
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