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Merge pull request #1235 from PowerShell/andschwa/alc-wip

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Converge the AssemblyLoadContext scenario
This commit is contained in:
Andy Schwartzmeyer 2016-06-29 12:01:10 -07:00 committed by GitHub
parent bd21c84ece fec2cb8b74
commit ef32e2339e
16 changed files with 417 additions and 187 deletions
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2
.travis.yml
View file

@ -14,7 +14,7 @@ before_install:
- git submodule update --init -- src/Modules/Pester src/libpsl-native/test/googletest
- ./tools/download.sh
script:
- ulimit -n 4096; powershell -c "Import-Module ./build.psm1; Start-PSBootstrap; Start-PSBuild; Start-PSxUnit; Start-PSPester"
- ulimit -n 4096; powershell -c "Import-Module ./build.psm1; Start-PSBootstrap; Start-PSBuild -Publish; Start-PSPester; Start-PSxUnit"
notifications:
slack:
secure: 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

3
build.psm1
View file

@ -367,6 +367,9 @@ function Start-PSPester {
function Start-PSxUnit {
[CmdletBinding()]param()
log "xUnit tests are currently disabled pending fixes due to API and AssemblyLoadContext changes - @andschwa"
return
if ($IsWindows) {
throw "xUnit tests are only currently supported on Linux / OS X"
}

8
src/Microsoft.PowerShell.Commands.Utility/commands/utility/AddType.cs
View file

@ -1148,7 +1148,7 @@ namespace Microsoft.PowerShell.Commands
// First try by strong name
try
{
loadedAssembly = ClrFacade.Load(new AssemblyName(assemblyName));
loadedAssembly = Assembly.Load(new AssemblyName(assemblyName));
}
// Generates a FileNotFoundException if you can't load the strong type.
// So we'll try from the short name.
@ -2050,7 +2050,7 @@ namespace Microsoft.PowerShell.Commands
// First try by strong name
try
{
loadedAssembly = ClrFacade.Load(assemblyName);
loadedAssembly = Assembly.Load(assemblyName);
}
// Generates a FileNotFoundException if you can't load the strong type.
// So we'll try from the short name.
@ -2062,7 +2062,7 @@ namespace Microsoft.PowerShell.Commands
// Next, try an exact match
if (StrongNames.Value.ContainsKey(assemblyName))
{
return ClrFacade.Load(StrongNames.Value[assemblyName]);
return Assembly.Load(StrongNames.Value[assemblyName]);
}
// If the assembly name doesn't contain wildcards, return null. The caller generates an error here.
@ -2105,7 +2105,7 @@ namespace Microsoft.PowerShell.Commands
return null;
// Otherwise, load the assembly.
return ClrFacade.Load(matchedStrongName);
return Assembly.Load(matchedStrongName);
}
private static ConcurrentDictionary<string, string> InitializeStrongNameDictionary()

1
src/Microsoft.PowerShell.CoreCLR.AssemblyLoadContext/AssemblyInfo.cs
View file

@ -1,5 +1,6 @@
using System.Runtime.CompilerServices;
using System.Reflection;
[assembly:InternalsVisibleTo("System.Management.Automation,PublicKey=0024000004800000940000000602000000240000525341310004000001000100b5fc90e7027f67871e773a8fde8938c81dd402ba65b9201d60593e96c492651e889cc13f1415ebb53fac1131ae0bd333c5ee6021672d9718ea31a8aebd0da0072f25d87dba6fc90ffd598ed4da35e44c398c454307e8e33b8426143daec9f596836f97c8f74750e5975c64e2189f45def46b2a2b1247adc3652bf5c308055da9")]
[assembly:InternalsVisibleTo("powershell,PublicKey=0024000004800000940000000602000000240000525341310004000001000100b5fc90e7027f67871e773a8fde8938c81dd402ba65b9201d60593e96c492651e889cc13f1415ebb53fac1131ae0bd333c5ee6021672d9718ea31a8aebd0da0072f25d87dba6fc90ffd598ed4da35e44c398c454307e8e33b8426143daec9f596836f97c8f74750e5975c64e2189f45def46b2a2b1247adc3652bf5c308055da9")]
[assembly:AssemblyFileVersionAttribute("1.0.0.0")]
[assembly:AssemblyVersion("1.0.0.0")]

502
src/Microsoft.PowerShell.CoreCLR.AssemblyLoadContext/CoreCLR/CorePsAssemblyLoadContext.cs
View file

@ -10,33 +10,52 @@ using System.Collections.Generic;
using System.Globalization;
using System.Runtime.InteropServices;
using System.Reflection;
using System.Reflection.Metadata;
using System.Reflection.PortableExecutable;
using System.Runtime.Loader;
namespace System.Management.Automation
{
/// <summary>
/// The powershell custom assembly loader implementation
/// The powershell custom AssemblyLoadContext implementation
/// </summary>
internal partial class PowerShellAssemblyLoader
internal partial class PowerShellAssemblyLoadContext : AssemblyLoadContext
{
#region Resource_Strings
// We cannot use a satellite resources.dll to store resource strings for Microsoft.PowerShell.CoreCLR.AssemblyLoadContext.dll. This is because when retrieving resource strings, ResourceManager
// tries to load the satellite resources.dll using a probing approach, which will cause an infinite loop to PowerShellAssemblyLoader.Load(AssemblyName).
// tries to load the satellite resources.dll using a probing approach, which will cause an infinite loop to PowerShellAssemblyLoadContext.Load(AssemblyName).
// Take the 'en-US' culture as an example. When retrieving resource string to construct an exception, ResourceManager calls Assembly.Load(..) in the following order to load the resource dll:
// 1. Load assembly with culture 'en-US' (Microsoft.PowerShell.CoreCLR.AssemblyLoadContext.resources, Version=3.0.0.0, Culture=en-US, PublicKeyToken=31bf3856ad364e35)
// 2. Load assembly with culture 'en' (Microsoft.PowerShell.CoreCLR.AssemblyLoadContext.resources, Version=3.0.0.0, Culture=en, PublicKeyToken=31bf3856ad364e35)
// When the first attempt fails, we again need to retrieve the resouce string to construct another exception, which ends up with an infinite loop.
private const string BaseFolderDoesNotExist = "The base directory '{0}' does not exist.";
private const string CannotFindFileBasedOnAssemblyName = "Could not load file or assembly '{0}' or one of its dependencies. The system cannot find the file specified under any probing paths.";
private const string ManifestDefinitionDoesNotMatch = "Could not load file or assembly '{0}' or one of its dependencies. The located assembly's manifest definition does not match the assembly reference.";
private const string AssemblyPathDoesNotExist = "Could not load file or assembly '{0}' or one of its dependencies. The system cannot find the file specified.";
private const string InvalidAssemblyExtensionName = "Could not load file or assembly '{0}' or one of its dependencies. The file specified is not a DLL file.";
private const string AbsolutePathRequired = "Absolute path information is required.";
private const string SingletonAlreadyInitialized = "The singleton of PowerShellAssemblyLoadContext has already been initialized.";
private const string UseResolvingEventHandlerOnly = "PowerShellAssemblyLoadContext was initialized to use its 'Resolving' event handler only.";
#endregion Resource_Strings
#region Constructor
/// <summary>
/// Initialize a singleton of PowerShellAssemblyLoadContext
/// </summary>
internal static PowerShellAssemblyLoadContext InitializeSingleton(string basePaths, bool useResolvingHandlerOnly)
{
lock (syncObj)
{
if (Instance != null)
throw new InvalidOperationException(SingletonAlreadyInitialized);
Instance = new PowerShellAssemblyLoadContext(basePaths, useResolvingHandlerOnly);
return Instance;
}
}
/// <summary>
/// Constructor
/// </summary>
@ -44,9 +63,32 @@ namespace System.Management.Automation
/// Base directory paths that are separated by semicolon ';'.
/// They will be the default paths to probe assemblies.
/// </param>
internal PowerShellAssemblyLoader(string basePaths)
/// <param name="useResolvingHandlerOnly">
/// Indicate whether this instance is going to be used as a
/// full fledged ALC, or only its 'Resolve' handler is going
/// to be used.
/// </param>
/// <remarks>
/// When <paramref name="useResolvingHandlerOnly"/> is true, we will register to the 'Resolving' event of the default
/// load context with our 'Resolve' method, and depend on the default load context to resolve/load assemblies for PS.
/// This mode is used when TPA list of the native host only contains .NET Core libraries.
/// In this case, TPA binder will be consulted before hitting our resolving logic. The binding order of Assembly.Load is:
/// TPA binder --> Resolving event
///
/// When <paramref name="useResolvingHandlerOnly"/> is false, we will use this instance as a full fledged load context
/// to resolve/load assemblies for PS. This mode is used when TPA list of the native host contains both .NET Core libraries
/// and PS assemblies.
/// In this case, our Load override will kick in before consulting the TPA binder. The binding order of Assembly.Load is:
/// Load override --> TPA binder --> Resolving event
/// </remarks>
private PowerShellAssemblyLoadContext(string basePaths, bool useResolvingHandlerOnly)
{
#region Validation
if (string.IsNullOrEmpty(basePaths))
{
throw new ArgumentNullException("basePaths");
}
this.basePaths = basePaths.Split(new char[] { ';' }, StringSplitOptions.RemoveEmptyEntries);
for (int i = 0; i < this.basePaths.Length; i++)
{
@ -67,23 +109,34 @@ namespace System.Management.Automation
this.probingPaths = new List<string>(this.basePaths);
// NEXT: Initialize the CoreCLR type catalog dictionary [OrdinalIgnoreCase]
// - Key: namespace qualified type name (FullName)
// - Value: strong name of the TPA that contains the type represented by Key.
coreClrTypeCatalog = InitializeTypeCatalog();
this.loadContext = AssemblyLoadContext.Default;
loadContext.Resolving += Resolve;
// LAST: Handle useResolvingHandlerOnly flag
this.useResolvingHandlerOnly = useResolvingHandlerOnly;
this.activeLoadContext = useResolvingHandlerOnly ? Default : this;
if (useResolvingHandlerOnly)
{
Default.Resolving += Resolve;
}
else
{
var tempSet = new HashSet<string>(coreClrTypeCatalog.Values, StringComparer.OrdinalIgnoreCase);
tpaSet = new HashSet<string>(StringComparer.OrdinalIgnoreCase);
foreach (string tpa in tempSet)
{
string shortName = tpa.Substring(0, tpa.IndexOf(','));
tpaSet.Add(shortName);
}
}
}
#endregion Constructor
#region Fields
// AssemblyLoadContext used by this loader
private readonly AssemblyLoadContext loadContext;
// Serialized type catalog file
private readonly object syncObj = new object();
private readonly bool useResolvingHandlerOnly;
private readonly AssemblyLoadContext activeLoadContext;
private readonly static object syncObj = new object();
private readonly string[] basePaths;
// Initially, 'probingPaths' only contains psbase path. But every time we load an assembly through 'LoadFrom(string AssemblyPath)', we
// add its parent path to 'probingPaths', so that we are able to support implicit loading of an assembly from the same place where the
@ -91,8 +144,11 @@ namespace System.Management.Automation
// We don't need to worry about removing any paths from 'probingPaths', because once an assembly is loaded, it won't be unloaded until
// the current process exits, and thus the assembly itself and its parent folder cannot be deleted or renamed.
private readonly List<string> probingPaths;
// We use dictionary because the generated binary file by DataContractSerializer is about 39% smaller in size than using Hashtable.
// CoreCLR type catalog dictionary
// - Key: namespace qualified type name (FullName)
// - Value: strong name of the TPA that contains the type represented by Key.
private readonly Dictionary<string, string> coreClrTypeCatalog;
private readonly HashSet<string> tpaSet;
private readonly string[] extensions = new string[] { ".ni.dll", ".dll" };
/// <summary>
@ -114,18 +170,52 @@ namespace System.Management.Automation
#endregion Fields
#region Properties
/// <summary>
/// Singleton instance of PowerShellAssemblyLoadContext
/// </summary>
public static PowerShellAssemblyLoadContext Instance
{
get; private set;
}
#endregion Properties
#region Events
/// <summary>
/// Assembly load event
/// </summary>
internal event Action<Assembly> AssemblyLoad;
#endregion Events
#region Protected_Internal_Methods
/// <summary>
/// The global instance of PowerShellAssemblyLoader
/// </summary>
internal static PowerShellAssemblyLoader Instance { get; set; }
/// <summary>
/// Implement the AssemblyLoadContext.Resolving event handler. Search the requested assembly in probing paths.
/// Implement the AssemblyLoadContext.Load(AssemblyName). Search the requested assembly in probing paths.
/// Search the file "[assemblyName.Name][.ni].dll" in probing paths. If the file is found and it matches the requested AssemblyName, load it with LoadFromAssemblyPath.
/// </summary>
internal Assembly Resolve(AssemblyLoadContext sender, AssemblyName assemblyName)
protected override Assembly Load(AssemblyName assemblyName)
{
if (useResolvingHandlerOnly)
throw new NotSupportedException(UseResolvingEventHandlerOnly);
// We let the default context load the assemblies included in the type catalog as there
// appears to be a bug in .NET with method resolution with system libraries loaded by our
// context and not the default. We use the short name because some packages have inconsistent
// verions between reference and runtime assemblies.
if (tpaSet.Contains(assemblyName.Name))
return null;
return Resolve(this, assemblyName);
}
/// <summary>
/// The handler for the Resolving event
/// </summary>
private Assembly Resolve(AssemblyLoadContext loadContext, AssemblyName assemblyName)
{
// Probe the assembly cache
Assembly asmLoaded;
@ -157,7 +247,7 @@ namespace System.Management.Automation
if (File.Exists(asmFilePath))
{
isAssemblyFileFound = true;
AssemblyName asmNameFound = AssemblyLoadContext.GetAssemblyName(asmFilePath);
AssemblyName asmNameFound = GetAssemblyName(asmFilePath);
if (IsAssemblyMatching(assemblyName, asmNameFound))
{
isAssemblyFileMatching = true;
@ -172,39 +262,16 @@ namespace System.Management.Automation
}
}
// We failed to find the file specified
if (!isAssemblyFileFound)
// We failed to find the assembly file; or we found the file, but the assembly file doesn't match the request.
// In this case, return null so that other Resolving event handlers can kick in to resolve the request.
if (!isAssemblyFileFound || !isAssemblyFileMatching)
{
ThrowFileNotFoundException(
CannotFindFileBasedOnAssemblyName,
assemblyName.FullName);
return null;
}
// We found the file specified, but the found assembly doesn't match the request
if (!isAssemblyFileMatching)
{
ThrowFileLoadException(
ManifestDefinitionDoesNotMatch,
assemblyName.FullName);
}
try
{
asmLoaded = asmFilePath.EndsWith(".ni.dll", StringComparison.OrdinalIgnoreCase)
? loadContext.LoadFromNativeImagePath(asmFilePath, null)
: loadContext.LoadFromAssemblyPath(asmFilePath);
}
// Since .NET CLI built versions of PowerShell have all the
// built-in assemblies in the TPA list, the above will throw,
// and we have to use Assembly.Load. However, we must try the
// above first, otherwise assemblies that exist outside the TPA
// list will go into a recursive loop.
catch (System.IO.FileLoadException)
{
asmLoaded = System.Reflection.Assembly.Load(assemblyName);
}
// If it loaded, add it to the cache
asmLoaded = asmFilePath.EndsWith(".ni.dll", StringComparison.OrdinalIgnoreCase)
? loadContext.LoadFromNativeImagePath(asmFilePath, null)
: loadContext.LoadFromAssemblyPath(asmFilePath);
if (asmLoaded != null)
{
// Add the loaded assembly to the cache
@ -212,46 +279,20 @@ namespace System.Management.Automation
}
}
// Raise AssemblyLoad event
OnAssemblyLoaded(asmLoaded);
return asmLoaded;
}
/// <summary>
/// Load an assembly from its name.
/// </summary>
internal Assembly LoadFromAssemblyName(AssemblyName assemblyName)
{
return loadContext.LoadFromAssemblyName(assemblyName);
}
/// <summary>
/// Load an assembly from its file path.
/// Load an IL or NI assembly from its file path.
/// </summary>
internal Assembly LoadFrom(string assemblyPath)
{
#region Validation
if (string.IsNullOrEmpty(assemblyPath))
{
throw new ArgumentNullException("assemblyPath");
}
assemblyPath = Path.GetFullPath(assemblyPath);
if (!File.Exists(assemblyPath))
{
ThrowFileNotFoundException(
AssemblyPathDoesNotExist,
assemblyPath);
}
if (!string.Equals(Path.GetExtension(assemblyPath), ".DLL", StringComparison.OrdinalIgnoreCase))
{
ThrowFileLoadException(
InvalidAssemblyExtensionName,
assemblyPath);
}
#endregion Validation
ValidateAssemblyPath(assemblyPath, "assemblyPath");
Assembly asmLoaded;
AssemblyName assemblyName = AssemblyLoadContext.GetAssemblyName(assemblyPath);
AssemblyName assemblyName = GetAssemblyName(assemblyPath);
// Probe the assembly cache
if (TryGetAssemblyFromCache(assemblyName, out asmLoaded))
@ -264,28 +305,16 @@ namespace System.Management.Automation
if (TryGetAssemblyFromCache(assemblyName, out asmLoaded))
return asmLoaded;
try
{
// Load the assembly through 'LoadFromNativeImagePath' or 'LoadFromAssemblyPath'
asmLoaded = assemblyPath.EndsWith(".ni.dll", StringComparison.OrdinalIgnoreCase)
? loadContext.LoadFromNativeImagePath(assemblyPath, null)
: loadContext.LoadFromAssemblyPath(assemblyPath);
}
// Since .NET CLI built versions of PowerShell have all the
// built-in assemblies in the TPA list, the above will throw,
// and we have to use Assembly.Load. However, we must try the
// above first, otherwise assemblies that exist outside the TPA
// list will go into a recursive loop.
catch (System.IO.FileLoadException)
{
asmLoaded = System.Reflection.Assembly.Load(assemblyName);
}
// Load the assembly through 'LoadFromNativeImagePath' or 'LoadFromAssemblyPath'
asmLoaded = assemblyPath.EndsWith(".ni.dll", StringComparison.OrdinalIgnoreCase)
? activeLoadContext.LoadFromNativeImagePath(assemblyPath, null)
: activeLoadContext.LoadFromAssemblyPath(assemblyPath);
if (asmLoaded != null)
{
// Add the loaded assembly to the cache
AssemblyCache.TryAdd(assemblyName.Name, asmLoaded);
// Add the its parent path to our probing paths
// Add its parent path to our probing paths
string parentPath = Path.GetDirectoryName(assemblyPath);
if (!probingPaths.Contains(parentPath))
{
@ -294,6 +323,8 @@ namespace System.Management.Automation
}
}
// Raise AssemblyLoad event
OnAssemblyLoaded(asmLoaded);
return asmLoaded;
}
@ -302,9 +333,35 @@ namespace System.Management.Automation
/// </summary>
internal Assembly LoadFrom(Stream assembly)
{
var asm = loadContext.LoadFromStream(assembly);
TryAddAssemblyToCache(asm);
return asm;
if (assembly == null)
throw new ArgumentNullException("assembly");
Assembly asmLoaded;
AssemblyName assemblyName = GetAssemblyName(assembly);
// Probe the assembly cache
if (TryGetAssemblyFromCache(assemblyName, out asmLoaded))
return asmLoaded;
// Prepare to load the assembly
lock (syncObj)
{
// Probe the cache again in case it's already loaded
if (TryGetAssemblyFromCache(assemblyName, out asmLoaded))
return asmLoaded;
// Load the assembly through 'LoadFromStream'
asmLoaded = activeLoadContext.LoadFromStream(assembly);
if (asmLoaded != null)
{
// Add the loaded assembly to the cache
AssemblyCache.TryAdd(assemblyName.Name, asmLoaded);
}
}
// Raise AssemblyLoad event
OnAssemblyLoaded(asmLoaded);
return asmLoaded;
}
/// <summary>
@ -330,10 +387,18 @@ namespace System.Management.Automation
/// <summary>
/// Try adding a new assembly to the cache
/// </summary>
/// <remarks>
/// This is for adding a dynamic assembly to the cache.
/// PowerShell generates dynamic assemblies by directly emitting IL, and this API
/// is to add such assemblies to the cache so that types in them are discoverable.
/// </remarks>
internal bool TryAddAssemblyToCache(Assembly assembly)
{
AssemblyName asmName = assembly.GetName();
return AssemblyCache.TryAdd(asmName.Name, assembly);
bool success = AssemblyCache.TryAdd(asmName.Name, assembly);
// Raise AssemblyLoad event
if (success) { OnAssemblyLoaded(assembly); }
return success;
}
/// <summary>
@ -341,12 +406,17 @@ namespace System.Management.Automation
/// </summary>
internal string ProbeAssemblyFileForMetadataAnalysis(string assemblyShortName, string additionalSearchPath)
{
if (string.IsNullOrEmpty(assemblyShortName))
{
throw new ArgumentNullException("assemblyShortName");
}
bool useAdditionalSearchPath = false;
if (!string.IsNullOrWhiteSpace(additionalSearchPath))
if (!string.IsNullOrEmpty(additionalSearchPath))
{
if (!Path.IsPathRooted(additionalSearchPath))
{
additionalSearchPath = Path.GetFullPath(additionalSearchPath);
throw new ArgumentException(AbsolutePathRequired, "additionalSearchPath");
}
useAdditionalSearchPath = Directory.Exists(additionalSearchPath);
}
@ -386,10 +456,94 @@ namespace System.Management.Automation
return coreClrTypeCatalog.Keys;
}
/// <summary>
/// Set the profile optimization root on the appropriate load context
/// </summary>
internal void SetProfileOptimizationRootImpl(string directoryPath)
{
if (this.useResolvingHandlerOnly)
activeLoadContext.SetProfileOptimizationRoot(directoryPath);
}
/// <summary>
/// Start the profile optimization on the appropriate load context
/// </summary>
internal void StartProfileOptimizationImpl(string profile)
{
if (this.useResolvingHandlerOnly)
activeLoadContext.StartProfileOptimization(profile);
}
#endregion Protected_Internal_Methods
#region Private_Methods
/// <summary>
/// Handle the AssemblyLoad event
/// </summary>
private void OnAssemblyLoaded(Assembly assemblyLoaded)
{
Action<Assembly> assemblyLoadHandler = AssemblyLoad;
if (assemblyLoaded != null && assemblyLoadHandler != null)
{
try {
assemblyLoadHandler(assemblyLoaded);
}
catch {
// Catch all exceptions, same behavior as AppDomain.AssemblyLoad
}
}
}
/// <summary>
/// Validate assembly path value for the specified parameter
/// </summary>
private void ValidateAssemblyPath(string assemblyPath, string parameterName)
{
if (string.IsNullOrEmpty(assemblyPath))
{
throw new ArgumentNullException(parameterName);
}
if (!Path.IsPathRooted(assemblyPath))
{
throw new ArgumentException(AbsolutePathRequired, parameterName);
}
if (!File.Exists(assemblyPath))
{
ThrowFileNotFoundException(
AssemblyPathDoesNotExist,
assemblyPath);
}
if (!string.Equals(Path.GetExtension(assemblyPath), ".DLL", StringComparison.OrdinalIgnoreCase))
{
ThrowFileLoadException(
InvalidAssemblyExtensionName,
assemblyPath);
}
}
/// <summary>
/// Get AssemblyName of an assembly stream
/// </summary>
private AssemblyName GetAssemblyName(Stream assembly)
{
if (assembly == null)
throw new ArgumentNullException("assembly");
string strongAssemblyName = null;
using (PEReader peReader = new PEReader(assembly, PEStreamOptions.LeaveOpen | PEStreamOptions.PrefetchMetadata))
{
MetadataReader metadataReader = peReader.GetMetadataReader();
strongAssemblyName = AssemblyMetadataHelper.GetAssemblyStrongName(metadataReader);
}
assembly.Seek(0, SeekOrigin.Begin);
return new AssemblyName(strongAssemblyName);
}
/// <summary>
/// Try to get the specified assembly from cache
/// </summary>
@ -466,26 +620,38 @@ namespace System.Management.Automation
/// </param>
private Assembly GetTrustedPlatformAssembly(string tpaStrongName)
{
Assembly asmLoaded;
AssemblyName assemblyName = new AssemblyName(tpaStrongName);
// With the current standalone-app model of OPS, .NET Core libraries and PS assemblies are mixed together in one folder.
// So when using PSALC as a full fledged ALC in OPS, some TPAs might be loaded by our Load override. In that case, if we
// alwasy call Assembly.Load here to get a TPA, we might end up with a different Assembly instance of the the same TPA
// loaded in the default load context. We want to use the same assembly instance for type resolution in PS to avoid creating
// types and running .NET code from different assembly instances of the same DLL. Therefore, we try our cache first to see
// if the requested TPA is already loaded. If so, we use that one. If not, we load it in default context using Assembly.Load.
// Once a TPA is loaded in the default context, the same Assembly instance will always be used by custom ALC's when they attempt
// to resolve an "Assembly.Load" request for the same TPA.
//
// For in-box PS of NanoServer/IoT and the share-framework host model of OPS, we don't have the mixed libraries/assemblies
// problem, and TPAs are always resolved/loaded by the default context. In those cases, checking our cache would be unnecessary,
// but it won't cause any problems.
// Probe the assembly cache
Assembly asmLoaded;
if (TryGetAssemblyFromCache(assemblyName, out asmLoaded))
return asmLoaded;
// Prepare to load the TPA
// Prepare to load the assembly
lock (syncObj)
{
// Probe the cache again in case it's already loaded
if (TryGetAssemblyFromCache(assemblyName, out asmLoaded))
return asmLoaded;
// Load the specified TPA
// The requested TPA is not loaded by PS ALC, so load it in the default load context using Assembly.Load.
// There is no need to add it to our cache. It's cached in the default context.
asmLoaded = Assembly.Load(assemblyName);
AssemblyCache.TryAdd(assemblyName.Name, asmLoaded);
return asmLoaded;
}
return asmLoaded;
}
/// <summary>
@ -510,31 +676,105 @@ namespace System.Management.Automation
}
/// <summary>
/// Set an instance of PowerShellAssemblyLoader to be the default Assembly Load Context.
/// This is the managed entry point for Microsoft.PowerShell.CoreCLR.AssemblyLoadContext.dll.
/// </summary>
public class PowerShellAssemblyLoadContextInitializer
{
// Porting note: it's much easier to send an LPStr on Linux
private const UnmanagedType stringType =
#if LINUX
UnmanagedType.LPStr
#else
UnmanagedType.LPWStr
#endif
;
private static object[] EmptyArray = new object[0];
/// <summary>
/// Set the default Assembly Load Context
/// Create a singleton of PowerShellAssemblyLoadContext.
/// Then register to the Resolving event of the load context that loads this assembly.
/// </summary>
public static void SetPowerShellAssemblyLoadContext([MarshalAs(stringType)]string basePaths)
/// <remarks>
/// This method is to be used by native host whose TPA list doesn't include PS assemblies, such as the
/// in-box Nano powershell.exe, the PS remote WinRM plugin, in-box Nano DSC and in-box Nano SCOM agent.
/// </remarks>
/// <param name="basePaths">
/// Base directory paths that are separated by semicolon ';'.
/// They will be the default paths to probe assemblies.
/// </param>
public static void SetPowerShellAssemblyLoadContext([MarshalAs(UnmanagedType.LPWStr)]string basePaths)
{
if (PowerShellAssemblyLoader.Instance == null)
{
PowerShellAssemblyLoader.Instance = new PowerShellAssemblyLoader(basePaths);
}
if (string.IsNullOrEmpty(basePaths))
throw new ArgumentNullException("basePaths");
PowerShellAssemblyLoadContext.InitializeSingleton(basePaths, useResolvingHandlerOnly: true);
}
/// <summary>
/// Create a singleton of PowerShellAssemblyLoadContext.
/// Then load the assembly containing the actual entry point using it.
/// </summary>
/// <param name="basePaths">
/// Base directory paths that are separated by semicolon ';'.
/// They will be the default paths to probe assemblies.
/// </param>
/// <param name="entryAssemblyName">
/// Name of the assembly that contains the actual entry point.
/// </param>
/// <returns>
/// The assembly that contains the actual entry point.
/// </returns>
public static Assembly InitializeAndLoadEntryAssembly(string basePaths, AssemblyName entryAssemblyName)
{
if (string.IsNullOrEmpty(basePaths))
throw new ArgumentNullException("basePaths");
if (entryAssemblyName == null)
throw new ArgumentNullException("entryAssemblyName");
var psLoadContext = PowerShellAssemblyLoadContext.InitializeSingleton(basePaths, useResolvingHandlerOnly: false);
return psLoadContext.LoadFromAssemblyName(entryAssemblyName);
}
/// <summary>
/// Create a singleton of PowerShellAssemblyLoadContext.
/// Then call into the actual entry point based on the given assembly name, type name, method name and arguments.
/// </summary>
/// <param name="basePaths">
/// Base directory paths that are separated by semicolon ';'.
/// They will be the default paths to probe assemblies.
/// </param>
/// <param name="entryAssemblyName">
/// Name of the assembly that contains the actual entry point.
/// </param>
/// <param name="entryTypeName">
/// Name of the type that contains the actual entry point.
/// </param>
/// <param name="entryMethodName">
/// Name of the actual entry point method.
/// </param>
/// <param name="args">
/// An array of arguments passed to the entry point method.
/// </param>
/// <returns>
/// The return value of running the entry point method.
/// </returns>
public static object InitializeAndCallEntryMethod(string basePaths, AssemblyName entryAssemblyName, string entryTypeName, string entryMethodName, object[] args)
{
if (string.IsNullOrEmpty(basePaths))
throw new ArgumentNullException("basePaths");
if (entryAssemblyName == null)
throw new ArgumentNullException("entryAssemblyName");
if (string.IsNullOrEmpty(entryTypeName))
throw new ArgumentNullException("entryTypeName");
if (string.IsNullOrEmpty(entryMethodName))
throw new ArgumentNullException("entryMethodName");
args = args ?? EmptyArray;
var psLoadContext = PowerShellAssemblyLoadContext.InitializeSingleton(basePaths, useResolvingHandlerOnly: false);
var entryAssembly = psLoadContext.LoadFromAssemblyName(entryAssemblyName);
var entryType = entryAssembly.GetType(entryTypeName, throwOnError: true, ignoreCase: true);
var methodInfo = entryType.GetMethod(entryMethodName, BindingFlags.Static | BindingFlags.Public | BindingFlags.IgnoreCase);
return methodInfo.Invoke(null, args);
}
}
}
#endif
#endif

1
src/Microsoft.PowerShell.CoreCLR.AssemblyLoadContext/project.json
View file

@ -27,6 +27,7 @@
"NETStandard.Library": "1.6.0",
"System.Runtime.Loader": "4.0.0",
"System.Reflection.Metadata": "1.1.0",
"System.Reflection.TypeExtensions": "4.1.0",
"System.Security.Cryptography.Algorithms": "4.2.0"
}
}

3
src/System.Management.Automation/engine/CommandCompletion/CompletionCompleters.cs
View file

@ -36,8 +36,7 @@ namespace System.Management.Automation
static CompletionCompleters()
{
#if CORECLR
// Porting note: removed until we have full assembly loading solution
// ClrFacade.AddAssemblyLoadHandler(UpdateTypeCacheOnAssemblyLoad);
ClrFacade.AddAssemblyLoadHandler(UpdateTypeCacheOnAssemblyLoad);
#else
AppDomain.CurrentDomain.AssemblyLoad += UpdateTypeCacheOnAssemblyLoad;
#endif

2
src/System.Management.Automation/engine/ExecutionContext.cs
View file

@ -1559,7 +1559,7 @@ namespace System.Management.Automation
try
{
loadedAssembly = ClrFacade.Load(new AssemblyName(assemblyString));
loadedAssembly = Assembly.Load(new AssemblyName(assemblyString));
}
catch (FileNotFoundException fileNotFound)
{

2
src/System.Management.Automation/engine/InitialSessionState.cs
View file

@ -5674,7 +5674,7 @@ if($paths) {
try
{
// WARNING: DUPLICATE CODE see RunspaceConfigForSingleShell
assembly = ClrFacade.Load(new AssemblyName(psSnapInInfo.AssemblyName));
assembly = Assembly.Load(new AssemblyName(psSnapInInfo.AssemblyName));
}
catch (BadImageFormatException e)
{

2
src/System.Management.Automation/engine/remoting/fanin/InitialSessionStateProvider.cs
View file

@ -662,7 +662,7 @@ namespace System.Management.Automation.Remoting
{
try
{
result = ClrFacade.Load(new AssemblyName(assemblyName));
result = Assembly.Load(new AssemblyName(assemblyName));
}
catch (FileLoadException e)
{

2
src/System.Management.Automation/help/HelpSystem.cs
View file

@ -667,7 +667,7 @@ namespace System.Management.Automation
}
else
{
providerAssembly = ClrFacade.Load(providerInfo.AssemblyName);
providerAssembly = Assembly.Load(providerInfo.AssemblyName);
}
try

2
src/System.Management.Automation/singleshell/config/RunspaceConfigForSingleShell.cs
View file

@ -618,7 +618,7 @@ namespace System.Management.Automation.Runspaces
try
{
// WARNING: DUPLICATE CODE see InitialSessionState
assembly = ClrFacade.Load(new AssemblyName(mshsnapinInfo.AssemblyName));
assembly = Assembly.Load(new AssemblyName(mshsnapinInfo.AssemblyName));
}
catch (FileLoadException e)
{

45
src/System.Management.Automation/utils/ClrFacade.cs
View file

@ -97,7 +97,7 @@ namespace System.Management.Automation
#if CORECLR
try
{
return process.SafeHandle.DangerousGetHandle();
return process.SafeHandle.DangerousGetHandle();
}
catch (InvalidOperationException)
{
@ -279,32 +279,6 @@ namespace System.Management.Automation
#endif
}
/// <summary>
/// Porting note: Load assembly by name through the AssemblyLoadContext.
/// This is to ensure that the types get cached.
/// </summary>
internal static Assembly Load(AssemblyName assembly)
{
#if CORECLR
return PSAssemblyLoadContext.LoadFromAssemblyName(assembly);
#else
return Assembly.Load(assembly);
#endif
}
/// <summary>
/// Same as the above, but overloaded for a name in a string.
/// </summary>
internal static Assembly Load(string assembly)
{
#if CORECLR
return PSAssemblyLoadContext.LoadFromAssemblyName(new AssemblyName(assembly));
#else
return Assembly.Load(assembly);
#endif
}
/// <summary>
/// Facade for EnumBuilder.CreateTypeInfo
/// </summary>
@ -361,17 +335,16 @@ namespace System.Management.Automation
/// <summary>
/// Add the AssemblyLoad handler
/// </summary>
// Porting note: disabled until full solution comes
// internal static void AddAssemblyLoadHandler(Action<Assembly> handler)
// {
// PSAssemblyLoadContext.AssemblyLoad += handler;
// }
internal static void AddAssemblyLoadHandler(Action<Assembly> handler)
{
PSAssemblyLoadContext.AssemblyLoad += handler;
}
private static PowerShellAssemblyLoader PSAssemblyLoadContext
private static PowerShellAssemblyLoadContext PSAssemblyLoadContext
{
get
{
return PowerShellAssemblyLoader.Instance;
return PowerShellAssemblyLoadContext.Instance;
}
}
#endif
@ -688,7 +661,7 @@ namespace System.Management.Automation
internal static void SetProfileOptimizationRoot(string directoryPath)
{
#if CORECLR
System.Runtime.Loader.AssemblyLoadContext.Default.SetProfileOptimizationRoot(directoryPath);
PSAssemblyLoadContext.SetProfileOptimizationRootImpl(directoryPath);
#else
System.Runtime.ProfileOptimization.SetProfileRoot(directoryPath);
#endif
@ -701,7 +674,7 @@ namespace System.Management.Automation
internal static void StartProfileOptimization(string profile)
{
#if CORECLR
System.Runtime.Loader.AssemblyLoadContext.Default.StartProfileOptimization(profile);
PSAssemblyLoadContext.StartProfileOptimizationImpl(profile);
#else
System.Runtime.ProfileOptimization.StartProfile(profile);
#endif

9
src/TypeCatalogGen/TypeCatalogGen.cs
View file

@ -41,7 +41,7 @@ Usage: TypeCatalogGen.exe <{0}> <{1}>
/*
* Go through all reference assemblies of .NET Core and generate the type catalog -> Dictionary<NamespaceQualifiedTypeName, TPAStrongName>
* Then auto-generate the partial class 'PowerShellAssemblyLoader' that has the code to initialize the type catalog cache.
* Then auto-generate the partial class 'PowerShellAssemblyLoadContext' that has the code to initialize the type catalog cache.
*
* In CoreCLR, there is no way to get all loaded TPA assemblies (.NET Framework Assemblies). In order to get type based on type name, powershell needs to know what .NET
* types are available and in which TPA assemblies. So we have to generate the type catalog based on the reference assemblies of .NET Core.
@ -105,7 +105,7 @@ Usage: TypeCatalogGen.exe <{0}> <{1}>
}
}
WritePowerShellAssemblyLoaderPartialClass(targetFilePath, typeNameToAssemblyMap);
WritePowerShellAssemblyLoadContextPartialClass(targetFilePath, typeNameToAssemblyMap);
}
/// <summary>
@ -272,7 +272,7 @@ Usage: TypeCatalogGen.exe <{0}> <{1}>
/// <summary>
/// Generate the CSharp source code that initialize the type catalog.
/// </summary>
private static void WritePowerShellAssemblyLoaderPartialClass(string targetFilePath, Dictionary<string, string> typeNameToAssemblyMap)
private static void WritePowerShellAssemblyLoadContextPartialClass(string targetFilePath, Dictionary<string, string> typeNameToAssemblyMap)
{
const string SourceFormat = " typeCatalog[\"{0}\"] = \"{1}\";";
const string SourceHead = @"//
@ -284,10 +284,11 @@ Usage: TypeCatalogGen.exe <{0}> <{1}>
// catalog based on the reference assemblies of .NET Core.
//
using System.Collections.Generic;
using System.Runtime.Loader;
namespace System.Management.Automation
{{
internal partial class PowerShellAssemblyLoader
internal partial class PowerShellAssemblyLoadContext : AssemblyLoadContext
{{
private Dictionary<string, string> InitializeTypeCatalog()
{{

14
src/powershell/Program.cs
View file

@ -2,7 +2,9 @@
Copyright (c) Microsoft Corporation. All rights reserved.
--********************************************************************/
using System;
using System.Management.Automation;
using System.Reflection;
namespace Microsoft.PowerShell
{
@ -21,9 +23,17 @@ namespace Microsoft.PowerShell
{
#if CORECLR
// Open PowerShell has to set the ALC here, since we don't own the native host
PowerShellAssemblyLoadContextInitializer.SetPowerShellAssemblyLoadContext(string.Empty);
#endif
string appBase = System.IO.Path.GetDirectoryName(typeof(ManagedPSEntry).GetTypeInfo().Assembly.Location);
return (int)PowerShellAssemblyLoadContextInitializer.
InitializeAndCallEntryMethod(
appBase,
new AssemblyName("Microsoft.PowerShell.ConsoleHost, Version=3.0.0.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35"),
"Microsoft.PowerShell.UnmanagedPSEntry",
"Start",
new object[] { string.Empty, args, args.Length });
#else
return UnmanagedPSEntry.Start(string.Empty, args, args.Length);
#endif
}
}
}

6
test/powershell/Base-Directory.Tests.ps1
View file

@ -50,7 +50,8 @@ Describe "Configuration file locations" {
& $powershell -noprofile { (Get-PSReadlineOption).HistorySavePath } | Should Be $expectedReadline
}
It @ItArgs "JIT cache should be created correctly" {
# This feature (and thus test) has been disabled because of the AssemblyLoadContext scenario
It "JIT cache should be created correctly" -Skip {
Remove-Item -ErrorAction SilentlyContinue $expectedCache
& $powershell -noprofile { exit }
$expectedCache | Should Exist
@ -105,7 +106,8 @@ Describe "Configuration file locations" {
& $powershell -noprofile { (Get-PSReadlineOption).HistorySavePath } | Should Be $expected
}
It @ItArgs "JIT cache should respect XDG_CACHE_HOME" {
# This feature (and thus test) has been disabled because of the AssemblyLoadContext scenario
It -Skip "JIT cache should respect XDG_CACHE_HOME" {
$env:XDG_CACHE_HOME = $TestDrive
$expected = [IO.Path]::Combine($TestDrive, "powershell", "StartupProfileData-NonInteractive")
Remove-Item -ErrorAction SilentlyContinue $expected