2 // rootcontext.cs: keeps track of our tree representation, and assemblies loaded.
4 // Author: Miguel de Icaza (miguel@ximian.com)
5 // Ravi Pratap (ravi@ximian.com)
7 // Licensed under the terms of the GNU GPL
9 // (C) 2001 Ximian, Inc (http://www.ximian.com)
12 using System.Collections;
13 using System.Reflection;
14 using System.Reflection.Emit;
15 using System.Diagnostics;
17 namespace Mono.CSharp {
19 public enum LanguageVersion
25 public class RootContext {
28 // Contains the parsed tree
33 // This hashtable contains all of the #definitions across the source code
34 // it is used by the ConditionalAttribute handler.
36 public static Hashtable AllDefines = new Hashtable ();
39 // Whether we are being linked against the standard libraries.
40 // This is only used to tell whether `System.Object' should
41 // have a parent or not.
43 public static bool StdLib = true;
46 // This keeps track of the order in which classes were defined
47 // so that we can poulate them in that order.
49 // Order is important, because we need to be able to tell by
50 // examining the parent's list of methods which ones are virtual
51 // or abstract as well as the parent names (to implement new,
54 static ArrayList type_container_resolve_order;
55 static ArrayList attribute_types;
58 // Holds a reference to the Private Implementation Details
61 static ArrayList helper_classes;
63 static TypeBuilder impl_details_class;
65 public static int WarningLevel = 2;
67 public static Target Target = Target.Exe;
68 public static string TargetExt = ".exe";
70 public static bool VerifyClsCompliance = true;
72 public static LanguageVersion Version = LanguageVersion.Default;
75 // We keep strongname related info here because
76 // it's also used as complier options from CSC 8.x
78 public static string StrongNameKeyFile;
79 public static string StrongNameKeyContainer;
80 public static bool StrongNameDelaySign = false;
88 type_container_resolve_order = new ArrayList ();
91 public static bool NeedsEntryPoint {
93 return RootContext.Target == Target.Exe || RootContext.Target == Target.WinExe;
97 static public Tree Tree {
103 static public string MainClass;
105 public static void RegisterOrder (TypeContainer tc)
107 type_container_resolve_order.Add (tc);
110 public static void RegisterAttribute (TypeContainer tc)
112 if (attribute_types == null)
113 attribute_types = new ArrayList ();
115 attribute_types.Add (tc);
119 // The default compiler checked state
121 static public bool Checked = false;
124 // Whether to allow Unsafe code
126 static public bool Unsafe = false;
128 static string MakeFQN (string nsn, string name)
132 return String.Concat (nsn, ".", name);
136 // This function is used to resolve the hierarchy tree.
137 // It processes interfaces, structs and classes in that order.
139 // It creates the TypeBuilder's as it processes the user defined
142 static public void ResolveTree ()
145 // Process the attribute types separately and before anything else
147 if (attribute_types != null)
148 foreach (TypeContainer tc in attribute_types)
152 // Interfaces are processed next, as classes and
153 // structs might inherit from an object or implement
154 // a set of interfaces, we need to be able to tell
155 // them appart by just using the TypeManager.
157 TypeContainer root = Tree.Types;
159 ArrayList ifaces = root.Interfaces;
161 foreach (Interface i in ifaces)
165 foreach (TypeContainer tc in root.Types)
168 if (root.Delegates != null)
169 foreach (Delegate d in root.Delegates)
172 if (root.Enums != null)
173 foreach (Enum e in root.Enums)
177 static void Error_TypeConflict (string name, Location loc)
180 520, loc, "`" + name + "' conflicts with a predefined type");
183 static void Error_TypeConflict (string name)
186 520, "`" + name + "' conflicts with a predefined type");
190 // Resolves a single class during the corlib bootstrap process
192 static TypeBuilder BootstrapCorlib_ResolveClass (TypeContainer root, string name)
194 object o = root.GetDefinition (name);
196 Report.Error (518, "The predefined type `" + name + "' is not defined");
202 DeclSpace d = (DeclSpace) o;
204 Error_TypeConflict (name, d.Location);
206 Error_TypeConflict (name);
211 return ((DeclSpace) o).DefineType ();
215 // Resolves a struct during the corlib bootstrap process
217 static void BootstrapCorlib_ResolveStruct (TypeContainer root, string name)
219 object o = root.GetDefinition (name);
221 Report.Error (518, "The predefined type `" + name + "' is not defined");
227 DeclSpace d = (DeclSpace) o;
229 Error_TypeConflict (name, d.Location);
231 Error_TypeConflict (name);
236 ((DeclSpace) o).DefineType ();
240 // Resolves a struct during the corlib bootstrap process
242 static void BootstrapCorlib_ResolveInterface (TypeContainer root, string name)
244 object o = root.GetDefinition (name);
246 Report.Error (518, "The predefined type `" + name + "' is not defined");
250 if (!(o is Interface)){
252 DeclSpace d = (DeclSpace) o;
254 Error_TypeConflict (name, d.Location);
256 Error_TypeConflict (name);
261 ((DeclSpace) o).DefineType ();
265 // Resolves a delegate during the corlib bootstrap process
267 static void BootstrapCorlib_ResolveDelegate (TypeContainer root, string name)
269 object o = root.GetDefinition (name);
271 Report.Error (518, "The predefined type `" + name + "' is not defined");
272 Environment.Exit (1);
275 if (!(o is Delegate)){
276 Error_TypeConflict (name);
280 ((DeclSpace) o).DefineType ();
285 /// Resolves the core types in the compiler when compiling with --nostdlib
287 static public void ResolveCore ()
289 TypeContainer root = Tree.Types;
291 TypeManager.object_type = BootstrapCorlib_ResolveClass (root, "System.Object");
292 TypeManager.value_type = BootstrapCorlib_ResolveClass (root, "System.ValueType");
293 TypeManager.attribute_type = BootstrapCorlib_ResolveClass (root, "System.Attribute");
295 string [] interfaces_first_stage = {
296 "System.IComparable", "System.ICloneable",
297 "System.IConvertible",
299 "System.Collections.IEnumerable",
300 "System.Collections.ICollection",
301 "System.Collections.IEnumerator",
302 "System.Collections.IList",
303 "System.IAsyncResult",
304 "System.IDisposable",
306 "System.Runtime.Serialization.ISerializable",
308 "System.Reflection.IReflect",
309 "System.Reflection.ICustomAttributeProvider"
312 foreach (string iname in interfaces_first_stage)
313 BootstrapCorlib_ResolveInterface (root, iname);
316 // These are the base value types
318 string [] structs_first_stage = {
319 "System.Byte", "System.SByte",
320 "System.Int16", "System.UInt16",
321 "System.Int32", "System.UInt32",
322 "System.Int64", "System.UInt64",
325 foreach (string cname in structs_first_stage)
326 BootstrapCorlib_ResolveStruct (root, cname);
329 // Now, we can load the enumerations, after this point,
332 TypeManager.InitEnumUnderlyingTypes ();
334 string [] structs_second_stage = {
335 "System.Single", "System.Double",
336 "System.Char", "System.Boolean",
337 "System.Decimal", "System.Void",
338 "System.RuntimeFieldHandle",
339 "System.RuntimeArgumentHandle",
340 "System.RuntimeTypeHandle",
342 "System.TypedReference",
346 foreach (string cname in structs_second_stage)
347 BootstrapCorlib_ResolveStruct (root, cname);
350 // These are classes that depends on the core interfaces
352 string [] classes_second_stage = {
353 "System.Reflection.MemberInfo",
358 // These are not really important in the order, but they
359 // are used by the compiler later on (typemanager/CoreLookupType-d)
361 "System.Runtime.CompilerServices.RuntimeHelpers",
362 "System.Reflection.DefaultMemberAttribute",
363 "System.Threading.Monitor",
365 "System.AttributeUsageAttribute",
366 "System.Runtime.InteropServices.DllImportAttribute",
367 "System.Runtime.CompilerServices.MethodImplAttribute",
368 "System.Runtime.InteropServices.MarshalAsAttribute",
369 "System.Diagnostics.ConditionalAttribute",
370 "System.ObsoleteAttribute",
371 "System.ParamArrayAttribute",
372 "System.CLSCompliantAttribute",
373 "System.Security.UnverifiableCodeAttribute",
374 "System.Security.Permissions.SecurityAttribute",
375 "System.Runtime.CompilerServices.IndexerNameAttribute",
376 "System.Runtime.CompilerServices.DecimalConstantAttribute",
377 "System.Runtime.InteropServices.InAttribute",
378 "System.Runtime.InteropServices.StructLayoutAttribute",
379 "System.Runtime.InteropServices.FieldOffsetAttribute",
380 "System.InvalidOperationException",
381 "System.NotSupportedException",
382 "System.MarshalByRefObject",
383 "System.Security.CodeAccessPermission"
386 // We must store them here before calling BootstrapCorlib_ResolveDelegate.
387 TypeManager.string_type = BootstrapCorlib_ResolveClass (root, "System.String");
388 TypeManager.enum_type = BootstrapCorlib_ResolveClass (root, "System.Enum");
389 TypeManager.array_type = BootstrapCorlib_ResolveClass (root, "System.Array");
390 TypeManager.multicast_delegate_type = BootstrapCorlib_ResolveClass (root, "System.MulticastDelegate");
391 TypeManager.delegate_type = BootstrapCorlib_ResolveClass (root, "System.Delegate");
393 foreach (string cname in classes_second_stage)
394 BootstrapCorlib_ResolveClass (root, cname);
396 BootstrapCorlib_ResolveDelegate (root, "System.AsyncCallback");
400 // Closes all open types
404 // We usually use TypeBuilder types. When we are done
405 // creating the type (which will happen after we have added
406 // methods, fields, etc) we need to "Define" them before we
407 // can save the Assembly
409 static public void CloseTypes ()
411 TypeContainer root = Tree.Types;
413 if (root.Enums != null)
414 foreach (Enum en in root.Enums)
417 if (attribute_types != null)
418 foreach (TypeContainer tc in attribute_types)
422 // We do this in two passes, first we close the structs,
423 // then the classes, because it seems the code needs it this
424 // way. If this is really what is going on, we should probably
425 // make sure that we define the structs in order as well.
427 foreach (TypeContainer tc in type_container_resolve_order){
428 if (tc.Kind == Kind.Struct && tc.Parent == tree.Types){
433 foreach (TypeContainer tc in type_container_resolve_order){
434 if (!(tc.Kind == Kind.Struct && tc.Parent == tree.Types))
438 if (root.Delegates != null)
439 foreach (Delegate d in root.Delegates)
444 // If we have a <PrivateImplementationDetails> class, close it
446 if (helper_classes != null){
447 foreach (TypeBuilder type_builder in helper_classes)
448 type_builder.CreateType ();
451 attribute_types = null;
452 type_container_resolve_order = null;
453 helper_classes = null;
455 TypeManager.CleanUp ();
459 /// Used to register classes that need to be closed after all the
460 /// user defined classes
462 public static void RegisterHelperClass (TypeBuilder helper_class)
464 if (helper_classes == null)
465 helper_classes = new ArrayList ();
466 helper_classes.Add (helper_class);
470 // This idea is from Felix Arrese-Igor
472 // Returns : the implicit parent of a composite namespace string
473 // eg. Implicit parent of A.B is A
475 static public string ImplicitParent (string ns)
477 int i = ns.LastIndexOf ('.');
481 return ns.Substring (0, i);
484 static Type NamespaceLookup (DeclSpace ds, string name, Location loc)
487 // Try in the current namespace and all its implicit parents
489 for (NamespaceEntry ns = ds.NamespaceEntry; ns != null; ns = ns.ImplicitParent) {
490 object result = ns.Lookup (ds, name, false, loc);
495 return (Type) result;
504 // Public function used to locate types, this can only
505 // be used after the ResolveTree function has been invoked.
507 // Returns: Type or null if they type can not be found.
509 // Come to think of it, this should be a DeclSpace
511 static public Type LookupType (DeclSpace ds, string name, bool silent, Location loc)
515 if (ds.Cache.Contains (name)) {
516 t = (Type) ds.Cache [name];
519 // For the case the type we are looking for is nested within this one
520 // or is in any base class
522 DeclSpace containing_ds = ds;
523 while (containing_ds != null){
525 // if the member cache has been created, lets use it.
526 // the member cache is MUCH faster.
527 if (containing_ds.MemberCache != null) {
528 t = containing_ds.MemberCache.FindNestedType (name);
530 containing_ds = containing_ds.Parent;
538 // no member cache. Do it the hard way -- reflection
539 Type current_type = containing_ds.TypeBuilder;
541 while (current_type != null &&
542 current_type != TypeManager.object_type) {
546 t = TypeManager.LookupType (current_type.FullName + "." + name);
552 current_type = current_type.BaseType;
555 containing_ds = containing_ds.Parent;
558 t = NamespaceLookup (ds, name, loc);
559 if (!silent || t != null)
563 if (t == null && !silent)
564 Report.Error (246, loc, "Cannot find type `"+name+"'");
570 // This is the silent version of LookupType, you can use this
571 // to `probe' for a type
573 static public Type LookupType (TypeContainer tc, string name, Location loc)
575 return LookupType (tc, name, true, loc);
578 static void Report1530 (Location loc)
580 Report.Error (1530, loc, "Keyword new not allowed for namespace elements");
583 static public void PopulateCoreType (TypeContainer root, string name)
585 DeclSpace ds = (DeclSpace) root.GetDefinition (name);
587 ds.DefineMembers (root);
591 static public void BootCorlib_PopulateCoreTypes ()
593 TypeContainer root = tree.Types;
595 PopulateCoreType (root, "System.Object");
596 PopulateCoreType (root, "System.ValueType");
597 PopulateCoreType (root, "System.Attribute");
601 // Populates the structs and classes with fields and methods
604 // This is invoked after all interfaces, structs and classes
605 // have been defined through `ResolveTree'
606 static public void PopulateTypes ()
608 TypeContainer root = Tree.Types;
610 if (attribute_types != null)
611 foreach (TypeContainer tc in attribute_types)
612 tc.DefineMembers (root);
614 if (type_container_resolve_order != null){
615 if (RootContext.StdLib){
616 foreach (TypeContainer tc in type_container_resolve_order)
617 tc.DefineMembers (root);
619 foreach (TypeContainer tc in type_container_resolve_order) {
620 // When compiling corlib, these types have already been
621 // populated from BootCorlib_PopulateCoreTypes ().
622 if (((tc.Name == "System.Object") ||
623 (tc.Name == "System.Attribute") ||
624 (tc.Name == "System.ValueType")))
627 tc.DefineMembers (root);
632 ArrayList delegates = root.Delegates;
633 if (delegates != null){
634 foreach (Delegate d in delegates)
635 if ((d.ModFlags & Modifiers.NEW) == 0)
636 d.DefineMembers (root);
638 Report1530 (d.Location);
641 ArrayList enums = root.Enums;
643 foreach (Enum en in enums)
644 if ((en.ModFlags & Modifiers.NEW) == 0)
645 en.DefineMembers (root);
647 Report1530 (en.Location);
651 // Check for cycles in the struct layout
653 if (type_container_resolve_order != null){
654 Hashtable seen = new Hashtable ();
655 foreach (TypeContainer tc in type_container_resolve_order)
656 TypeManager.CheckStructCycles (tc, seen);
661 // A generic hook delegate
663 public delegate void Hook ();
666 // A hook invoked when the code has been generated.
668 public static event Hook EmitCodeHook;
671 // DefineTypes is used to fill in the members of each type.
673 static public void DefineTypes ()
675 TypeContainer root = Tree.Types;
677 if (attribute_types != null)
678 foreach (TypeContainer tc in attribute_types)
681 if (type_container_resolve_order != null){
682 foreach (TypeContainer tc in type_container_resolve_order) {
683 // When compiling corlib, these types have already been
684 // populated from BootCorlib_PopulateCoreTypes ().
685 if (!RootContext.StdLib &&
686 ((tc.Name == "System.Object") ||
687 (tc.Name == "System.Attribute") ||
688 (tc.Name == "System.ValueType")))
691 if ((tc.ModFlags & Modifiers.NEW) == 0)
696 ArrayList delegates = root.Delegates;
697 if (delegates != null){
698 foreach (Delegate d in delegates)
699 if ((d.ModFlags & Modifiers.NEW) == 0)
703 ArrayList enums = root.Enums;
705 foreach (Enum en in enums)
706 if ((en.ModFlags & Modifiers.NEW) == 0)
711 static public void EmitCode ()
713 if (attribute_types != null)
714 foreach (TypeContainer tc in attribute_types)
717 CodeGen.Assembly.Emit (Tree.Types);
718 CodeGen.Module.Emit (Tree.Types);
720 if (Tree.Types.Enums != null) {
721 foreach (Enum e in Tree.Types.Enums)
725 if (type_container_resolve_order != null) {
726 foreach (TypeContainer tc in type_container_resolve_order)
730 if (Tree.Types.Delegates != null) {
731 foreach (Delegate d in Tree.Types.Delegates)
735 // Run any hooks after all the types have been defined.
736 // This is used to create nested auxiliary classes for example
739 if (EmitCodeHook != null)
744 // Public Field, used to track which method is the public entry
747 static public MethodInfo EntryPoint;
750 // Track the location of the entry point.
752 static public Location EntryPointLocation;
755 // These are used to generate unique names on the structs and fields.
757 static int field_count;
760 // Makes an initialized struct, returns the field builder that
761 // references the data. Thanks go to Sergey Chaban for researching
762 // how to do this. And coming up with a shorter mechanism than I
763 // was able to figure out.
765 // This works but makes an implicit public struct $ArrayType$SIZE and
766 // makes the fields point to it. We could get more control if we did
769 // 1. DefineNestedType on the impl_details_class with our struct.
771 // 2. Define the field on the impl_details_class
773 static public FieldBuilder MakeStaticData (byte [] data)
777 if (impl_details_class == null){
778 impl_details_class = CodeGen.Module.Builder.DefineType (
779 "<PrivateImplementationDetails>",
780 TypeAttributes.NotPublic,
781 TypeManager.object_type);
783 RegisterHelperClass (impl_details_class);
786 fb = impl_details_class.DefineInitializedData (
787 "$$field-" + (field_count++), data,
788 FieldAttributes.Static | FieldAttributes.Assembly);