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V8Proxy.cs
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212 lines (183 loc) · 6.95 KB
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// Copyright (c) Microsoft Corporation. All rights reserved.
// Licensed under the MIT license.
using System;
using System.Collections.Generic;
using System.Diagnostics;
using System.IO;
using System.Linq;
using System.Runtime.InteropServices;
using System.Text;
using Microsoft.ClearScript.Util;
using Microsoft.ClearScript.V8.ICUData;
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;
private static bool triedToLoadNativeAssembly;
private static bool loadedNativeAssembly;
internal static void OnEntityHolderCreated()
{
lock (dataLock)
{
if (++splitImplCount == 1)
{
V8SplitProxyManaged.Initialize();
}
if (!triedToLoadNativeAssembly)
{
triedToLoadNativeAssembly = true;
var initializedICU = false;
try
{
hNativeAssembly = LoadNativeAssembly();
loadedNativeAssembly = true;
}
catch (Exception)
{
initializedICU = MiscHelpers.Try(InitializeICU);
if (!initializedICU)
{
throw;
}
}
if (!initializedICU)
{
InitializeICU();
}
}
}
}
internal static void OnEntityHolderDestroyed()
{
lock (dataLock)
{
if (--splitImplCount < 1)
{
V8SplitProxyManaged.Teardown();
if (loadedNativeAssembly)
{
FreeLibrary(hNativeAssembly);
hNativeAssembly = IntPtr.Zero;
loadedNativeAssembly = false;
}
}
}
}
private static IntPtr LoadNativeAssembly()
{
string platform;
string architecture;
string extension;
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)
{
architecture = "x64";
}
else if (RuntimeInformation.ProcessArchitecture == Architecture.X86)
{
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}";
var messageBuilder = new StringBuilder();
var paths = GetDirPaths(platform, architecture).Select(dirPath => Path.Combine(dirPath, fileName)).Distinct();
foreach (var path in paths)
{
var hLibrary = LoadLibrary(path);
if (hLibrary != IntPtr.Zero)
{
return hLibrary;
}
messageBuilder.AppendInvariant("\n{0}: {1}", path, MiscHelpers.EnsureNonBlank(GetLoadLibraryErrorMessage(), "Unknown error"));
}
var message = MiscHelpers.FormatInvariant("Cannot load ClearScript V8 library. Load failure information for {0}:{1}", fileName, messageBuilder);
throw new TypeLoadException(message);
}
private static unsafe void InitializeICU()
{
using (var stream = typeof(V8ICUData).Assembly.GetManifestResourceStream(V8ICUData.ResourceName))
{
var bytes = new byte[stream.Length];
var length = stream.Read(bytes, 0, bytes.Length);
Debug.Assert(length == bytes.Length);
fixed (byte* pBytes = bytes)
{
var pICUData = (IntPtr)pBytes;
V8SplitProxyNative.InvokeNoThrow(instance => instance.V8Environment_InitializeICU(pICUData, Convert.ToUInt32(length)));
}
}
}
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;
yield return appDomain.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
}
}