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|
//
// LinkContext.cs
//
// Author:
// Jb Evain (jbevain@gmail.com)
//
// (C) 2006 Jb Evain
//
// Permission is hereby granted, free of charge, to any person obtaining
// a copy of this software and associated documentation files (the
// "Software"), to deal in the Software without restriction, including
// without limitation the rights to use, copy, modify, merge, publish,
// distribute, sublicense, and/or sell copies of the Software, and to
// permit persons to whom the Software is furnished to do so, subject to
// the following conditions:
//
// The above copyright notice and this permission notice shall be
// included in all copies or substantial portions of the Software.
//
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
// EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
// MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
// NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
// LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
// OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
// WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
//
using System;
using System.Collections.Generic;
using System.Diagnostics;
using System.IO;
using Mono.Cecil;
using Mono.Cecil.Cil;
namespace Mono.Linker
{
public class UnintializedContextFactory
{
virtual public AnnotationStore CreateAnnotationStore (LinkContext context) => new AnnotationStore (context);
virtual public MarkingHelpers CreateMarkingHelpers (LinkContext context) => new MarkingHelpers (context);
virtual public Tracer CreateTracer (LinkContext context) => new Tracer (context);
}
public class LinkContext : IDisposable
{
readonly Pipeline _pipeline;
AssemblyAction _coreAction;
AssemblyAction _userAction;
readonly Dictionary<string, AssemblyAction> _actions;
string _outputDirectory;
readonly Dictionary<string, string> _parameters;
bool _linkSymbols;
bool _keepTypeForwarderOnlyAssemblies;
bool _ignoreUnresolved;
readonly AssemblyResolver _resolver;
readonly TypeNameResolver _typeNameResolver;
readonly ReaderParameters _readerParameters;
ISymbolReaderProvider _symbolReaderProvider;
ISymbolWriterProvider _symbolWriterProvider;
readonly AnnotationStore _annotations;
readonly CustomAttributeSource _customAttributes;
public Pipeline Pipeline {
get { return _pipeline; }
}
public CustomAttributeSource CustomAttributes {
get { return _customAttributes; }
}
public AnnotationStore Annotations {
get { return _annotations; }
}
public bool DeterministicOutput { get; set; }
public string OutputDirectory {
get { return _outputDirectory; }
set { _outputDirectory = value; }
}
public AssemblyAction CoreAction {
get { return _coreAction; }
set { _coreAction = value; }
}
public AssemblyAction UserAction {
get { return _userAction; }
set { _userAction = value; }
}
public bool LinkSymbols {
get { return _linkSymbols; }
set { _linkSymbols = value; }
}
public bool KeepTypeForwarderOnlyAssemblies {
get { return _keepTypeForwarderOnlyAssemblies; }
set { _keepTypeForwarderOnlyAssemblies = value; }
}
#if FEATURE_ILLINK
public readonly bool KeepMembersForDebugger = true;
#else
public bool KeepMembersForDebugger { get; set; }
#endif
public bool IgnoreUnresolved {
get { return _ignoreUnresolved; }
set { _ignoreUnresolved = value; }
}
public bool EnableReducedTracing { get; set; }
public bool KeepUsedAttributeTypesOnly { get; set; }
public bool KeepDependencyAttributes { get; set; }
public bool IgnoreDescriptors { get; set; }
public bool IgnoreSubstitutions { get; set; }
public bool IgnoreLinkAttributes { get; set; }
public bool StripDescriptors { get; set; }
public bool StripSubstitutions { get; set; }
public bool StripLinkAttributes { get; set; }
public Dictionary<string, bool> FeatureSettings { get; private set; }
public List<string> AttributeDefinitions { get; private set; }
public List<PInvokeInfo> PInvokes { get; private set; }
public string PInvokesListFile;
public System.Collections.IDictionary Actions {
get { return _actions; }
}
public AssemblyResolver Resolver {
get { return _resolver; }
}
internal TypeNameResolver TypeNameResolver {
get { return _typeNameResolver; }
}
public ReaderParameters ReaderParameters {
get { return _readerParameters; }
}
public ISymbolReaderProvider SymbolReaderProvider {
get { return _symbolReaderProvider; }
set { _symbolReaderProvider = value; }
}
public ISymbolWriterProvider SymbolWriterProvider {
get { return _symbolWriterProvider; }
set { _symbolWriterProvider = value; }
}
public bool LogMessages { get; set; }
public ILogger Logger { private get; set; } = new ConsoleLogger ();
public MarkingHelpers MarkingHelpers { get; private set; }
public KnownMembers MarkedKnownMembers { get; private set; }
public WarningSuppressionWriter WarningSuppressionWriter { get; private set; }
public HashSet<int> NoWarn { get; set; }
public Dictionary<int, bool> WarnAsError { get; set; }
public bool GeneralWarnAsError { get; set; }
public WarnVersion WarnVersion { get; set; }
public bool OutputWarningSuppressions { get; set; }
public UnconditionalSuppressMessageAttributeState Suppressions { get; set; }
public Tracer Tracer { get; private set; }
public IReflectionPatternRecorder ReflectionPatternRecorder { get; set; }
#if !FEATURE_ILLINK
public string[] ExcludedFeatures { get; set; }
#endif
public CodeOptimizationsSettings Optimizations { get; set; }
public bool AddReflectionAnnotations { get; set; }
public string AssemblyListFile { get; set; }
public LinkContext (Pipeline pipeline)
: this (pipeline, new AssemblyResolver ())
{
}
public LinkContext (Pipeline pipeline, AssemblyResolver resolver)
: this (pipeline, resolver, new ReaderParameters {
AssemblyResolver = resolver
}, new UnintializedContextFactory ())
{
}
public LinkContext (Pipeline pipeline, AssemblyResolver resolver, ReaderParameters readerParameters, UnintializedContextFactory factory)
{
_pipeline = pipeline;
_resolver = resolver;
_resolver.Context = this;
_typeNameResolver = new TypeNameResolver (this);
_actions = new Dictionary<string, AssemblyAction> ();
_parameters = new Dictionary<string, string> (StringComparer.Ordinal);
_readerParameters = readerParameters;
_customAttributes = new CustomAttributeSource ();
SymbolReaderProvider = new DefaultSymbolReaderProvider (false);
if (factory == null)
throw new ArgumentNullException (nameof (factory));
_annotations = factory.CreateAnnotationStore (this);
MarkingHelpers = factory.CreateMarkingHelpers (this);
Tracer = factory.CreateTracer (this);
ReflectionPatternRecorder = new LoggingReflectionPatternRecorder (this);
MarkedKnownMembers = new KnownMembers ();
StripDescriptors = true;
StripSubstitutions = true;
StripLinkAttributes = true;
PInvokes = new List<PInvokeInfo> ();
Suppressions = new UnconditionalSuppressMessageAttributeState (this);
NoWarn = new HashSet<int> ();
GeneralWarnAsError = false;
WarnAsError = new Dictionary<int, bool> ();
WarnVersion = WarnVersion.Latest;
// See https://github.com/mono/linker/issues/612
const CodeOptimizations defaultOptimizations =
CodeOptimizations.BeforeFieldInit |
CodeOptimizations.OverrideRemoval |
CodeOptimizations.UnusedInterfaces |
CodeOptimizations.IPConstantPropagation;
Optimizations = new CodeOptimizationsSettings (defaultOptimizations);
}
public void SetFeatureValue (string feature, bool value)
{
Debug.Assert (!String.IsNullOrEmpty (feature));
if (FeatureSettings == null) {
FeatureSettings = new Dictionary<string, bool> { { feature, value } };
return;
}
FeatureSettings[feature] = value;
}
public void AddAttributeDefinitionFile (string file)
{
if (AttributeDefinitions == null) {
AttributeDefinitions = new List<string> { file };
return;
}
if (AttributeDefinitions.Contains (file))
return;
AttributeDefinitions.Add (file);
}
public TypeDefinition GetType (string fullName)
{
int pos = fullName.IndexOf (",");
fullName = TypeReferenceExtensions.ToCecilName (fullName);
if (pos == -1) {
foreach (AssemblyDefinition asm in GetAssemblies ()) {
var type = asm.MainModule.GetType (fullName);
if (type != null)
return type;
}
return null;
}
string asmname = fullName.Substring (pos + 1);
fullName = fullName.Substring (0, pos);
AssemblyDefinition assembly = Resolve (AssemblyNameReference.Parse (asmname));
return assembly.MainModule.GetType (fullName);
}
public AssemblyDefinition Resolve (string name)
{
if (File.Exists (name)) {
try {
return _resolver.ResolveFromPath (name, _readerParameters);
} catch (Exception e) {
throw new AssemblyResolutionException (new AssemblyNameReference (name, new Version ()), e);
}
}
return Resolve (new AssemblyNameReference (name, new Version ()));
}
public AssemblyDefinition Resolve (IMetadataScope scope)
{
AssemblyNameReference reference = GetReference (scope);
try {
AssemblyDefinition assembly = _resolver.Resolve (reference, _readerParameters);
if (assembly != null)
RegisterAssembly (assembly);
return assembly;
} catch (Exception e) when (!(e is AssemblyResolutionException)) {
throw new AssemblyResolutionException (reference, e);
}
}
public void RegisterAssembly (AssemblyDefinition assembly)
{
if (SeenFirstTime (assembly)) {
SafeReadSymbols (assembly);
SetDefaultAction (assembly);
}
}
protected bool SeenFirstTime (AssemblyDefinition assembly)
{
return !_annotations.HasAction (assembly);
}
public virtual void SafeReadSymbols (AssemblyDefinition assembly)
{
if (assembly.MainModule.HasSymbols)
return;
if (_symbolReaderProvider == null)
throw new ArgumentNullException (nameof (_symbolReaderProvider));
try {
var symbolReader = _symbolReaderProvider.GetSymbolReader (
assembly.MainModule,
_resolver.GetAssemblyFileName (assembly));
if (symbolReader == null)
return;
try {
assembly.MainModule.ReadSymbols (symbolReader);
} catch {
symbolReader.Dispose ();
return;
}
// Add symbol reader to annotations only if we have successfully read it
_annotations.AddSymbolReader (assembly, symbolReader);
} catch { }
}
public virtual ICollection<AssemblyDefinition> ResolveReferences (AssemblyDefinition assembly)
{
List<AssemblyDefinition> references = new List<AssemblyDefinition> ();
if (assembly == null)
return references;
foreach (AssemblyNameReference reference in assembly.MainModule.AssemblyReferences) {
try {
AssemblyDefinition definition = Resolve (reference);
if (definition != null)
references.Add (definition);
} catch (Exception e) {
throw new LinkerFatalErrorException (MessageContainer.CreateErrorMessage ($"Assembly '{assembly.FullName}' reference '{reference.FullName}' could not be resolved", 1009), e);
}
}
return references;
}
static AssemblyNameReference GetReference (IMetadataScope scope)
{
AssemblyNameReference reference;
if (scope is ModuleDefinition moduleDefinition) {
AssemblyDefinition asm = moduleDefinition.Assembly;
reference = asm.Name;
} else
reference = (AssemblyNameReference) scope;
return reference;
}
public void SetAction (AssemblyDefinition assembly, AssemblyAction defaultAction)
{
RegisterAssembly (assembly);
if (!_actions.TryGetValue (assembly.Name.Name, out AssemblyAction action))
action = defaultAction;
Annotations.SetAction (assembly, action);
}
protected void SetDefaultAction (AssemblyDefinition assembly)
{
AssemblyNameDefinition name = assembly.Name;
if (_actions.TryGetValue (name.Name, out AssemblyAction action)) {
} else if (IsCore (name)) {
action = _coreAction;
} else {
action = _userAction;
}
_annotations.SetAction (assembly, action);
}
public static bool IsCore (AssemblyNameReference name)
{
switch (name.Name) {
case "mscorlib":
case "Accessibility":
case "Mono.Security":
// WPF
case "PresentationFramework":
case "PresentationCore":
case "WindowsBase":
case "UIAutomationProvider":
case "UIAutomationTypes":
case "PresentationUI":
case "ReachFramework":
case "netstandard":
return true;
default:
return name.Name.StartsWith ("System")
|| name.Name.StartsWith ("Microsoft");
}
}
public virtual AssemblyDefinition[] GetAssemblies ()
{
var cache = _resolver.AssemblyCache;
AssemblyDefinition[] asms = new AssemblyDefinition[cache.Count];
cache.Values.CopyTo (asms, 0);
return asms;
}
public AssemblyDefinition GetLoadedAssembly (string name)
{
if (!string.IsNullOrEmpty (name) && _resolver.AssemblyCache.TryGetValue (name, out var ad))
return ad;
return null;
}
public void SetCustomData (string key, string value)
{
_parameters[key] = value;
}
public bool HasCustomData (string key)
{
return _parameters.ContainsKey (key);
}
public bool TryGetCustomData (string key, out string value)
{
return _parameters.TryGetValue (key, out value);
}
public void Dispose ()
{
_resolver.Dispose ();
}
#if !FEATURE_ILLINK
public bool IsFeatureExcluded (string featureName)
{
return ExcludedFeatures != null && Array.IndexOf (ExcludedFeatures, featureName) >= 0;
}
#endif
public bool IsOptimizationEnabled (CodeOptimizations optimization, MemberReference context)
{
return Optimizations.IsEnabled (optimization, context?.Module.Assembly);
}
public bool IsOptimizationEnabled (CodeOptimizations optimization, AssemblyDefinition context)
{
return Optimizations.IsEnabled (optimization, context);
}
public void LogMessage (MessageContainer message)
{
if (message == MessageContainer.Empty)
return;
if ((message.Category == MessageCategory.Diagnostic ||
message.Category == MessageCategory.Info) && !LogMessages)
return;
if (OutputWarningSuppressions &&
(message.Category == MessageCategory.Warning || message.Category == MessageCategory.WarningAsError) &&
message.Origin?.MemberDefinition != null)
WarningSuppressionWriter.AddWarning (message.Code.Value, message.Origin?.MemberDefinition);
Logger?.LogMessage (message);
}
public void LogMessage (string message)
{
if (!LogMessages)
return;
LogMessage (MessageContainer.CreateInfoMessage (message));
}
public void LogDiagnostic (string message)
{
if (!LogMessages)
return;
LogMessage (MessageContainer.CreateDiagnosticMessage (message));
}
/// <summary>
/// Display a warning message to the end user.
/// This API is used for warnings defined in the linker, not by custom steps. Warning
/// versions are inferred from the code, and every warning that we define is versioned.
/// </summary>
/// <param name="text">Humanly readable message describing the warning</param>
/// <param name="code">Unique warning ID. Please see https://github.com/mono/linker/blob/master/doc/error-codes.md for the list of warnings and possibly add a new one</param>
/// <param name="origin">Filename or member where the warning is coming from</param>
/// <param name="subcategory">Optionally, further categorize this warning</param>
/// <returns>New MessageContainer of 'Warning' category</returns>
public void LogWarning (string text, int code, MessageOrigin origin, string subcategory = MessageSubCategory.None)
{
WarnVersion version = GetWarningVersion (code);
MessageContainer warning = MessageContainer.CreateWarningMessage (this, text, code, origin, version, subcategory);
LogMessage (warning);
}
/// <summary>
/// Display a warning message to the end user.
/// This API is used for warnings defined in the linker, not by custom steps. Warning
/// versions are inferred from the code, and every warning that we define is versioned.
/// </summary>
/// <param name="text">Humanly readable message describing the warning</param>
/// <param name="code">Unique warning ID. Please see https://github.com/mono/linker/blob/master/doc/error-codes.md for the list of warnings and possibly add a new one</param>
/// <param name="origin">Type or member where the warning is coming from</param>
/// <param name="subcategory">Optionally, further categorize this warning</param>
/// <returns>New MessageContainer of 'Warning' category</returns>
public void LogWarning (string text, int code, IMemberDefinition origin, int? ilOffset = null, string subcategory = MessageSubCategory.None)
{
MessageOrigin _origin = new MessageOrigin (origin, ilOffset);
LogWarning (text, code, _origin, subcategory);
}
/// <summary>
/// Display a warning message to the end user.
/// This API is used for warnings defined in the linker, not by custom steps. Warning
/// versions are inferred from the code, and every warning that we define is versioned.
/// </summary>
/// <param name="text">Humanly readable message describing the warning</param>
/// <param name="code">Unique warning ID. Please see https://github.com/mono/linker/blob/master/doc/error-codes.md for the list of warnings and possibly add a new one</param>
/// <param name="origin">Filename where the warning is coming from</param>
/// <param name="subcategory">Optionally, further categorize this warning</param>
/// <returns>New MessageContainer of 'Warning' category</returns>
public void LogWarning (string text, int code, string origin, string subcategory = MessageSubCategory.None)
{
MessageOrigin _origin = new MessageOrigin (origin);
LogWarning (text, code, _origin, subcategory);
}
/// <summary>
/// Display an error message to the end user.
/// </summary>
/// <param name="text">Humanly readable message describing the error</param>
/// <param name="code">Unique error ID. Please see https://github.com/mono/linker/blob/master/doc/error-codes.md for the list of errors and possibly add a new one</param>
/// <param name="subcategory">Optionally, further categorize this error</param>
/// <param name="origin">Filename, line, and column where the error was found</param>
/// <returns>New MessageContainer of 'Error' category</returns>
public void LogError (string text, int code, string subcategory = MessageSubCategory.None, MessageOrigin? origin = null)
{
var error = MessageContainer.CreateErrorMessage (text, code, subcategory, origin);
LogMessage (error);
}
public bool IsWarningSuppressed (int warningCode, MessageOrigin origin)
{
// This warning was turned off by --nowarn.
if (NoWarn.Contains (warningCode))
return true;
if (Suppressions == null)
return false;
return Suppressions.IsSuppressed (warningCode, origin, out _);
}
public bool IsWarningAsError (int warningCode)
{
bool value;
if (GeneralWarnAsError)
return !WarnAsError.TryGetValue (warningCode, out value) || value;
return WarnAsError.TryGetValue (warningCode, out value) && value;
}
static WarnVersion GetWarningVersion (int code)
{
// This should return an increasing WarnVersion for new warning waves.
return WarnVersion.ILLink5;
}
public void SetWarningSuppressionWriter (WarningSuppressionWriter.FileOutputKind fileOutputKind)
{
WarningSuppressionWriter = new WarningSuppressionWriter (this, fileOutputKind);
}
}
public class CodeOptimizationsSettings
{
readonly Dictionary<string, CodeOptimizations> perAssembly = new Dictionary<string, CodeOptimizations> ();
public CodeOptimizationsSettings (CodeOptimizations globalOptimizations)
{
Global = globalOptimizations;
}
public CodeOptimizations Global { get; set; }
internal bool IsEnabled (CodeOptimizations optimizations, AssemblyDefinition context)
{
return IsEnabled (optimizations, context?.Name.Name);
}
public bool IsEnabled (CodeOptimizations optimizations, string assemblyName)
{
// Only one bit is set
Debug.Assert (optimizations != 0 && (optimizations & (optimizations - 1)) == 0);
if (perAssembly.Count > 0 &&
perAssembly.TryGetValue (assemblyName, out CodeOptimizations assembly)) {
return (assembly & optimizations) != 0;
}
return (Global & optimizations) != 0;
}
public void Enable (CodeOptimizations optimizations, string assemblyContext = null)
{
if (assemblyContext == null) {
Global |= optimizations;
return;
}
if (!perAssembly.ContainsKey (assemblyContext)) {
perAssembly.Add (assemblyContext, optimizations);
return;
}
perAssembly[assemblyContext] |= optimizations;
}
public void Disable (CodeOptimizations optimizations, string assemblyContext = null)
{
if (assemblyContext == null) {
Global &= ~optimizations;
return;
}
if (!perAssembly.ContainsKey (assemblyContext)) {
perAssembly.Add (assemblyContext, 0);
return;
}
perAssembly[assemblyContext] &= ~optimizations;
}
}
[Flags]
public enum CodeOptimizations
{
BeforeFieldInit = 1 << 0,
/// <summary>
/// Option to disable removal of overrides of virtual methods when a type is never instantiated
///
/// Being able to disable this optimization is helpful when trying to troubleshoot problems caused by types created via reflection or from native
/// that do not get an instance constructor marked.
/// </summary>
OverrideRemoval = 1 << 1,
/// <summary>
/// Option to disable delaying marking of instance methods until an instance of that type could exist
/// </summary>
UnreachableBodies = 1 << 2,
/// <summary>
/// Option to remove .interfaceimpl for interface types that are not used
/// </summary>
UnusedInterfaces = 1 << 3,
/// <summary>
/// Option to do interprocedural constant propagation on return values
/// </summary>
IPConstantPropagation = 1 << 4,
/// <summary>
/// Devirtualizes methods and seals types
/// </summary>
Sealer = 1 << 5
}
}
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