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V8Proxy.cs
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// Copyright (c) Microsoft Corporation. All rights reserved.
// Licensed under the MIT license.
using System;
using System.Collections.Generic;
using System.IO;
using System.Linq;
using System.Runtime.InteropServices;
using System.Text;
using Microsoft.ClearScript.Util;
using Microsoft.ClearScript.V8.SplitProxy;
namespace Microsoft.ClearScript.V8
{
internal abstract partial class V8Proxy : IDisposable
{
private static readonly object dataLock = new object();
private static IntPtr hNativeAssembly;
private static ulong splitImplCount;
internal static bool OnEntityHolderCreated()
{
lock (dataLock)
{
if (hNativeAssembly == IntPtr.Zero)
{
hNativeAssembly = LoadNativeAssembly();
InitializeICU();
}
++splitImplCount;
return true;
}
}
internal static void OnEntityHolderDestroyed()
{
lock (dataLock)
{
if (--splitImplCount < 1)
{
FreeLibrary(hNativeAssembly);
hNativeAssembly = IntPtr.Zero;
}
}
}
private static IntPtr LoadNativeAssembly()
{
string platform;
string architecture;
string extension;
var isAndroid = HostSettings.IsAndroid;
if (isAndroid)
{
platform = "android";
extension = "so";
}
else if (RuntimeInformation.IsOSPlatform(OSPlatform.Windows))
{
platform = "win";
extension = "dll";
}
else if (RuntimeInformation.IsOSPlatform(OSPlatform.Linux))
{
platform = "linux";
extension = "so";
}
else if (RuntimeInformation.IsOSPlatform(OSPlatform.OSX))
{
platform = "osx";
extension = "dylib";
}
else
{
throw new PlatformNotSupportedException("Unsupported OS platform");
}
if (RuntimeInformation.ProcessArchitecture == Architecture.X64)
{
if (isAndroid)
{
architecture = "arm64";
}
else
{
architecture = "x64";
}
}
else if (RuntimeInformation.ProcessArchitecture == Architecture.X86)
{
if (isAndroid)
{
architecture = "arm";
}
else
{
architecture = "x86";
}
}
else if (RuntimeInformation.ProcessArchitecture == Architecture.Arm)
{
architecture = "arm";
}
else if (RuntimeInformation.ProcessArchitecture == Architecture.Arm64)
{
architecture = "arm64";
}
else
{
throw new PlatformNotSupportedException("Unsupported process architecture");
}
return LoadNativeLibrary("ClearScriptV8", platform, architecture, extension);
}
private static IntPtr LoadNativeLibrary(string baseName, string platform, string architecture, string extension)
{
var fileName = $"{baseName}.{platform}-{architecture}.{extension}";
IntPtr hLibrary = LoadLibrary(fileName);
if (hLibrary != IntPtr.Zero)
{
return hLibrary;
}
var messageBuilder = new StringBuilder();
var paths = GetDirPaths(platform, architecture).Select(dirPath => Path.Combine(dirPath, deploymentDirName, fileName)).Distinct();
foreach (var path in paths)
{
hLibrary = LoadLibrary(path);
if (hLibrary != IntPtr.Zero)
{
return hLibrary;
}
messageBuilder.AppendInvariant("\n{0}: {1}", path, MiscHelpers.EnsureNonBlank(GetLoadLibraryErrorMessage(), "Unknown error"));
}
if (string.IsNullOrEmpty(deploymentDirName))
{
var systemPath = Path.Combine(Environment.SystemDirectory, fileName);
hLibrary = LoadLibrary(systemPath);
if (hLibrary != IntPtr.Zero)
{
return hLibrary;
}
messageBuilder.AppendInvariant("\n{0}: {1}", systemPath, MiscHelpers.EnsureNonBlank(GetLoadLibraryErrorMessage(), "Unknown error"));
}
if (HostSettings.IsAndroid)
{
return IntPtr.Zero;
}
var message = MiscHelpers.FormatInvariant("Cannot load ClearScript V8 library. Load failure information for {0}:{1}", fileName, messageBuilder);
throw new TypeLoadException(message);
}
private static void InitializeICU()
{
// ReSharper disable RedundantJumpStatement
const string fileName = "ClearScriptV8.ICU.dat";
var paths = GetDirPaths(null, null).Select(dirPath => Path.Combine(dirPath, deploymentDirName, fileName)).Distinct();
foreach (var path in paths)
{
if (File.Exists(path))
{
V8SplitProxyNative.InvokeNoThrow(instance => instance.V8Environment_InitializeICU(path));
return;
}
}
if (string.IsNullOrEmpty(deploymentDirName))
{
var systemPath = Path.Combine(Environment.SystemDirectory, fileName);
if (File.Exists(systemPath))
{
V8SplitProxyNative.InvokeNoThrow(instance => instance.V8Environment_InitializeICU(systemPath));
return;
}
}
// ReSharper restore RedundantJumpStatement
}
private static IEnumerable<string> GetDirPaths(string platform, string architecture)
{
// The assembly location may be empty if the host preloaded the assembly
// from custom storage. Support for this scenario was requested on CodePlex.
var location = typeof(V8Proxy).Assembly.Location;
if (!string.IsNullOrWhiteSpace(location))
{
if ((platform != null) && (architecture != null))
{
yield return Path.Combine(Path.GetDirectoryName(location), "runtimes", $"{platform}-{architecture}", "native");
}
yield return Path.GetDirectoryName(location);
}
var appDomain = AppDomain.CurrentDomain;
var baseDirectory = "";
try
{
baseDirectory = appDomain.BaseDirectory;
}
catch { }
if (!string.IsNullOrWhiteSpace(baseDirectory)) yield return baseDirectory;
var searchPath = appDomain.RelativeSearchPath;
if (!string.IsNullOrWhiteSpace(searchPath))
{
foreach (var dirPath in searchPath.SplitSearchPath())
{
yield return dirPath;
}
}
searchPath = HostSettings.AuxiliarySearchPath;
if (!string.IsNullOrWhiteSpace(searchPath))
{
foreach (var dirPath in searchPath.SplitSearchPath())
{
yield return dirPath;
}
}
}
#region IDisposable implementation (abstract)
public abstract void Dispose();
#endregion
#region unit test support
private static string deploymentDirName = string.Empty;
internal static void RunWithDeploymentDir(string name, Action action)
{
deploymentDirName = name;
try
{
action();
}
finally
{
deploymentDirName = string.Empty;
}
}
#endregion
}
}