//
// rootcontext.cs: keeps track of our tree representation, and assemblies loaded.
//
// Author: Miguel de Icaza (miguel@ximian.com)
// Ravi Pratap (ravi@ximian.com)
// Marek Safar (marek.safar@gmail.com)
//
//
// Licensed under the terms of the GNU GPL
//
// (C) 2001 Ximian, Inc (http://www.ximian.com)
// (C) 2004 Novell, Inc
using System;
using System.Collections;
using System.Reflection;
using System.Reflection.Emit;
using System.Diagnostics;
namespace Mono.CSharp {
public enum LanguageVersion
{
Default = 0,
ISO_1 = 1,
LINQ
}
public class RootContext {
//
// Contains the parsed tree
//
static RootTypes root;
//
// This hashtable contains all of the #definitions across the source code
// it is used by the ConditionalAttribute handler.
//
public static Hashtable AllDefines = new Hashtable ();
//
// Whether we are being linked against the standard libraries.
// This is only used to tell whether `System.Object' should
// have a base class or not.
//
public static bool StdLib;
//
// This keeps track of the order in which classes were defined
// so that we can poulate them in that order.
//
// Order is important, because we need to be able to tell, by
// examining the list of methods of the base class, which ones are virtual
// or abstract as well as the parent names (to implement new,
// override).
//
static ArrayList type_container_resolve_order;
//
// Holds a reference to the Private Implementation Details
// class.
//
static ArrayList helper_classes;
static TypeBuilder impl_details_class;
public static int WarningLevel;
public static Target Target;
public static string TargetExt;
public static bool VerifyClsCompliance = true;
///
/// Holds /optimize option
///
public static bool Optimize = true;
public static LanguageVersion Version;
//
// We keep strongname related info here because
// it's also used as complier options from CSC 8.x
//
public static string StrongNameKeyFile;
public static string StrongNameKeyContainer;
public static bool StrongNameDelaySign;
//
// If set, enable XML documentation generation
//
public static Documentation Documentation;
static public string MainClass;
//
// Constructor
//
static RootContext ()
{
Reset ();
}
public static void Reset ()
{
root = new RootTypes ();
type_container_resolve_order = new ArrayList ();
EntryPoint = null;
WarningLevel = 3;
Checked = false;
Unsafe = false;
StdLib = true;
StrongNameKeyFile = null;
StrongNameKeyContainer = null;
StrongNameDelaySign = false;
MainClass = null;
Target = Target.Exe;
TargetExt = ".exe";
Version = LanguageVersion.Default;
Documentation = null;
impl_details_class = null;
helper_classes = null;
}
public static bool NeedsEntryPoint {
get { return RootContext.Target == Target.Exe || RootContext.Target == Target.WinExe; }
}
static public RootTypes ToplevelTypes {
get { return root; }
}
public static void RegisterOrder (TypeContainer tc)
{
type_container_resolve_order.Add (tc);
}
//
// The default compiler checked state
//
static public bool Checked;
//
// Whether to allow Unsafe code
//
static public bool Unsafe;
//
// This function is used to resolve the hierarchy tree.
// It processes interfaces, structs and classes in that order.
//
// It creates the TypeBuilder's as it processes the user defined
// types.
//
static public void ResolveTree ()
{
//
// Interfaces are processed next, as classes and
// structs might inherit from an object or implement
// a set of interfaces, we need to be able to tell
// them appart by just using the TypeManager.
//
foreach (TypeContainer tc in root.Types)
tc.CreateType ();
foreach (TypeContainer tc in root.Types)
tc.DefineType ();
if (root.Delegates != null)
foreach (Delegate d in root.Delegates)
d.DefineType ();
}
delegate bool VerifyBootstrapType (Type t);
static Type BootstrapCorlib_ResolveType (TypeContainer root, string name, VerifyBootstrapType typeVerifier)
{
TypeLookupExpression tle = new TypeLookupExpression (name);
Report.DisableErrors ();
TypeExpr te = tle.ResolveAsTypeTerminal (root, false);
Report.EnableErrors ();
if (te == null) {
Report.Error (518, "The predefined type `{0}' is not defined or imported", name);
return null;
}
Type t = te.Type;
if (!typeVerifier (t)) {
MemberCore mc = root.GetDefinition (name);
Location loc = Location.Null;
if (mc != null) {
name = mc.GetSignatureForError ();
loc = mc.Location;
}
Report.Error (520, loc, "The predefined type `{0}' is not declared correctly", name);
return null;
}
AttributeTester.RegisterNonObsoleteType (t);
return t;
}
//
// Resolves a single class during the corlib bootstrap process
//
static Type BootstrapCorlib_ResolveClass (TypeContainer root, string name)
{
return BootstrapCorlib_ResolveType (root, name, IsClass);
}
static bool IsClass (Type t)
{
DeclSpace ds = TypeManager.LookupDeclSpace (t);
if (ds != null)
return ds is Class;
return t.IsClass;
}
//
// Resolves a struct during the corlib bootstrap process
//
static void BootstrapCorlib_ResolveStruct (TypeContainer root, string name)
{
BootstrapCorlib_ResolveType (root, name, IsStruct);
}
static bool IsStruct (Type t)
{
DeclSpace ds = TypeManager.LookupDeclSpace (t);
if (ds != null)
return ds is Struct;
return TypeManager.IsSubclassOf (t, TypeManager.value_type);
}
//
// Resolves an interface during the corlib bootstrap process
//
static void BootstrapCorlib_ResolveInterface (TypeContainer root, string name)
{
BootstrapCorlib_ResolveType (root, name, IsInterface);
}
static bool IsInterface (Type t)
{
return t.IsInterface;
}
//
// Resolves a delegate during the corlib bootstrap process
//
static void BootstrapCorlib_ResolveDelegate (TypeContainer root, string name)
{
BootstrapCorlib_ResolveType (root, name, IsDelegate);
}
static bool IsDelegate (Type t)
{
return TypeManager.IsDelegateType (t);
}
///
/// Resolves the core types in the compiler when compiling with --nostdlib
///
static public void ResolveCore ()
{
TypeManager.object_type = BootstrapCorlib_ResolveClass (root, "System.Object");
TypeManager.system_object_expr.Type = TypeManager.object_type;
TypeManager.value_type = BootstrapCorlib_ResolveClass (root, "System.ValueType");
TypeManager.system_valuetype_expr.Type = TypeManager.value_type;
//
// The core attributes
//
BootstrapCorlib_ResolveInterface (root, "System.Runtime.InteropServices._Attribute");
TypeManager.attribute_type = BootstrapCorlib_ResolveClass (root, "System.Attribute");
TypeManager.obsolete_attribute_type = BootstrapCorlib_ResolveClass (root, "System.ObsoleteAttribute");
TypeManager.indexer_name_type = BootstrapCorlib_ResolveClass (root, "System.Runtime.CompilerServices.IndexerNameAttribute");
string [] interfaces_first_stage = {
"System.IComparable", "System.ICloneable",
"System.IConvertible",
"System.Collections.IEnumerable",
"System.Collections.ICollection",
"System.Collections.IEnumerator",
"System.Collections.IList",
"System.IAsyncResult",
"System.IDisposable",
"System.Runtime.Serialization.ISerializable",
"System.Reflection.IReflect",
"System.Reflection.ICustomAttributeProvider",
#if GMCS_SOURCE
"System.Runtime.InteropServices._Exception",
//
// Generic types
//
"System.Collections.Generic.IEnumerator`1",
"System.Collections.Generic.IEnumerable`1"
#endif
};
foreach (string iname in interfaces_first_stage)
BootstrapCorlib_ResolveInterface (root, iname);
//
// These are the base value types
//
string [] structs_first_stage = {
"System.Byte", "System.SByte",
"System.Int16", "System.UInt16",
"System.Int32", "System.UInt32",
"System.Int64", "System.UInt64",
};
foreach (string cname in structs_first_stage)
BootstrapCorlib_ResolveStruct (root, cname);
//
// Now, we can load the enumerations, after this point,
// we can use enums.
//
TypeManager.InitEnumUnderlyingTypes ();
string [] structs_second_stage = {
"System.Single", "System.Double",
"System.Char", "System.Boolean",
"System.Decimal", "System.Void",
"System.RuntimeFieldHandle",
"System.RuntimeArgumentHandle",
"System.RuntimeTypeHandle",
"System.IntPtr",
"System.TypedReference",
"System.ArgIterator"
};
foreach (string cname in structs_second_stage)
BootstrapCorlib_ResolveStruct (root, cname);
//
// These are classes that depends on the core interfaces
//
string [] classes_second_stage = {
"System.Enum",
"System.String",
"System.Array",
"System.Reflection.MemberInfo",
"System.Type",
"System.Exception",
#if GMCS_SOURCE
"System.Activator",
#endif
//
// These are not really important in the order, but they
// are used by the compiler later on (typemanager/CoreLookupType-d)
//
"System.Runtime.CompilerServices.RuntimeHelpers",
"System.Reflection.DefaultMemberAttribute",
"System.Threading.Monitor",
"System.Threading.Interlocked",
"System.AttributeUsageAttribute",
"System.Runtime.InteropServices.DllImportAttribute",
"System.Runtime.CompilerServices.MethodImplAttribute",
"System.Runtime.InteropServices.MarshalAsAttribute",
#if GMCS_SOURCE
"System.Runtime.CompilerServices.CompilerGeneratedAttribute",
"System.Runtime.CompilerServices.FixedBufferAttribute",
#endif
"System.Diagnostics.ConditionalAttribute",
"System.ParamArrayAttribute",
"System.CLSCompliantAttribute",
"System.Security.UnverifiableCodeAttribute",
"System.Security.Permissions.SecurityAttribute",
"System.Runtime.CompilerServices.DecimalConstantAttribute",
"System.Runtime.InteropServices.InAttribute",
"System.Runtime.InteropServices.OutAttribute",
"System.Runtime.InteropServices.StructLayoutAttribute",
"System.Runtime.InteropServices.FieldOffsetAttribute",
#if GMCS_SOURCE
"System.Runtime.InteropServices.DefaultCharSetAttribute",
#endif
"System.InvalidOperationException",
"System.NotSupportedException",
"System.MarshalByRefObject",
"System.Security.CodeAccessPermission",
"System.Runtime.CompilerServices.RequiredAttributeAttribute",
"System.Runtime.InteropServices.GuidAttribute",
"System.Reflection.AssemblyCultureAttribute"
};
foreach (string cname in classes_second_stage)
BootstrapCorlib_ResolveClass (root, cname);
#if GMCS_SOURCE
BootstrapCorlib_ResolveStruct (root, "System.Nullable`1");
#endif
TypeManager.delegate_type = BootstrapCorlib_ResolveClass (root, "System.Delegate");
BootstrapCorlib_ResolveClass (root, "System.MulticastDelegate");
BootstrapCorlib_ResolveDelegate (root, "System.AsyncCallback");
}
//
// Closes all open types
//
//
//
// We usually use TypeBuilder types. When we are done
// creating the type (which will happen after we have added
// methods, fields, etc) we need to "Define" them before we
// can save the Assembly
//
static public void CloseTypes ()
{
//
// We do this in two passes, first we close the structs,
// then the classes, because it seems the code needs it this
// way. If this is really what is going on, we should probably
// make sure that we define the structs in order as well.
//
foreach (TypeContainer tc in type_container_resolve_order){
if (tc.Kind == Kind.Struct && tc.Parent == root){
tc.CloseType ();
}
}
foreach (TypeContainer tc in type_container_resolve_order){
if (!(tc.Kind == Kind.Struct && tc.Parent == root))
tc.CloseType ();
}
if (root.Delegates != null)
foreach (Delegate d in root.Delegates)
d.CloseType ();
//
// If we have a class, close it
//
if (helper_classes != null){
foreach (TypeBuilder type_builder in helper_classes) {
#if GMCS_SOURCE
type_builder.SetCustomAttribute (TypeManager.compiler_generated_attr);
#endif
type_builder.CreateType ();
}
}
type_container_resolve_order = null;
helper_classes = null;
//root = null;
TypeManager.CleanUp ();
}
///
/// Used to register classes that need to be closed after all the
/// user defined classes
///
public static void RegisterCompilerGeneratedType (TypeBuilder helper_class)
{
if (helper_classes == null)
helper_classes = new ArrayList ();
helper_classes.Add (helper_class);
}
static public void PopulateCoreType (TypeContainer root, string name)
{
DeclSpace ds = (DeclSpace) root.GetDefinition (name);
// Core type was imported
if (ds == null)
return;
ds.DefineMembers ();
ds.Define ();
}
static public void BootCorlib_PopulateCoreTypes ()
{
PopulateCoreType (root, "System.Object");
PopulateCoreType (root, "System.ValueType");
PopulateCoreType (root, "System.Attribute");
PopulateCoreType (root, "System.Runtime.CompilerServices.IndexerNameAttribute");
}
//
// Populates the structs and classes with fields and methods
//
//
// This is invoked after all interfaces, structs and classes
// have been defined through `ResolveTree'
static public void PopulateTypes ()
{
if (type_container_resolve_order != null){
foreach (TypeContainer tc in type_container_resolve_order)
tc.ResolveType ();
foreach (TypeContainer tc in type_container_resolve_order)
tc.DefineMembers ();
}
ArrayList delegates = root.Delegates;
if (delegates != null){
foreach (Delegate d in delegates)
d.DefineMembers ();
}
//
// Check for cycles in the struct layout
//
if (type_container_resolve_order != null){
Hashtable seen = new Hashtable ();
foreach (TypeContainer tc in type_container_resolve_order)
TypeManager.CheckStructCycles (tc, seen);
}
}
//
// A generic hook delegate
//
public delegate void Hook ();
//
// A hook invoked when the code has been generated.
//
public static event Hook EmitCodeHook;
//
// DefineTypes is used to fill in the members of each type.
//
static public void DefineTypes ()
{
ArrayList delegates = root.Delegates;
if (delegates != null){
foreach (Delegate d in delegates)
d.Define ();
}
if (type_container_resolve_order != null){
foreach (TypeContainer tc in type_container_resolve_order) {
// When compiling corlib, these types have already been
// populated from BootCorlib_PopulateCoreTypes ().
if (!RootContext.StdLib &&
((tc.Name == "System.Object") ||
(tc.Name == "System.Attribute") ||
(tc.Name == "System.ValueType") ||
(tc.Name == "System.Runtime.CompilerServices.IndexerNameAttribute")))
continue;
tc.Define ();
}
}
}
static public void EmitCode ()
{
if (type_container_resolve_order != null) {
foreach (TypeContainer tc in type_container_resolve_order)
tc.EmitType ();
if (Report.Errors > 0)
return;
foreach (TypeContainer tc in type_container_resolve_order)
tc.VerifyMembers ();
}
if (root.Delegates != null) {
foreach (Delegate d in root.Delegates)
d.Emit ();
}
//
// Run any hooks after all the types have been defined.
// This is used to create nested auxiliary classes for example
//
if (EmitCodeHook != null)
EmitCodeHook ();
CodeGen.Assembly.Emit (root);
CodeGen.Module.Emit (root);
}
//
// Public Field, used to track which method is the public entry
// point.
//
static public MethodInfo EntryPoint;
//
// Track the location of the entry point.
//
static public Location EntryPointLocation;
//
// These are used to generate unique names on the structs and fields.
//
static int field_count;
//
// Makes an initialized struct, returns the field builder that
// references the data. Thanks go to Sergey Chaban for researching
// how to do this. And coming up with a shorter mechanism than I
// was able to figure out.
//
// This works but makes an implicit public struct $ArrayType$SIZE and
// makes the fields point to it. We could get more control if we did
// use instead:
//
// 1. DefineNestedType on the impl_details_class with our struct.
//
// 2. Define the field on the impl_details_class
//
static public FieldBuilder MakeStaticData (byte [] data)
{
FieldBuilder fb;
if (impl_details_class == null){
impl_details_class = CodeGen.Module.Builder.DefineType (
"",
TypeAttributes.NotPublic,
TypeManager.object_type);
RegisterCompilerGeneratedType (impl_details_class);
}
fb = impl_details_class.DefineInitializedData (
"$$field-" + (field_count++), data,
FieldAttributes.Static | FieldAttributes.Assembly);
return fb;
}
public static void CheckUnsafeOption (Location loc)
{
if (!Unsafe) {
Report.Error (227, loc,
"Unsafe code requires the `unsafe' command line option to be specified");
}
}
}
}