// Martin Baulig (martin@ximian.com)
// Raja R Harinath (rharinath@novell.com)
//
-// (C) 2001, 2002, 2003 Ximian, Inc.
+// Copyright 2001, 2002, 2003 Ximian, Inc.
+// Copyright 2003-2008 Novell, Inc.
//
using System;
using System.Text;
-using System.Collections;
-using System.Reflection;
-using System.Reflection.Emit;
-using System.Diagnostics;
+using System.Collections.Generic;
namespace Mono.CSharp
{
locals |= child.locals;
+ // throw away un-necessary information about variables in child blocks
+ if (locals.Count != CountLocals)
+ locals = new MyBitVector (locals, CountLocals);
+
if (overwrite)
is_unreachable = new_isunr;
else
protected abstract UsageVector Merge ();
- // <summary>
- // Merge a child branching.
- // </summary>
public UsageVector MergeChild (FlowBranching child)
{
- bool overwrite = false;
-
- switch (child.Type) {
- case BranchingType.Labeled:
- overwrite = true;
- break;
- case BranchingType.Block:
- if (child.Block != null && child.Block != child.Block.Explicit)
- overwrite = true;
- break;
- }
-
- Report.Debug (2, " MERGING CHILD", this, child);
- UsageVector result = CurrentUsageVector.MergeChild (child.Merge (), overwrite);
- Report.Debug (2, " MERGING CHILD DONE", this, result);
- return result;
+ return CurrentUsageVector.MergeChild (child.Merge (), true);
}
public virtual bool CheckRethrow (Location loc)
return CurrentUsageVector.IsAssigned (vi, false) || CurrentUsageVector.IsFieldAssigned (vi, field_name);
}
+ protected static Report Report {
+ get { return RootContext.ToplevelTypes.Compiler.Report; }
+ }
+
public void SetAssigned (VariableInfo vi)
{
CurrentUsageVector.SetAssigned (vi);
CurrentUsageVector.SetFieldAssigned (vi, name);
}
+#if DEBUG
public override string ToString ()
{
StringBuilder sb = new StringBuilder ();
sb.Append (")");
return sb.ToString ();
}
+#endif
public string Name {
get { return String.Format ("{0} ({1}:{2}:{3})", GetType (), id, Type, Location); }
return false;
}
- public static void Error_UnknownLabel (Location loc, string label)
+ public static void Error_UnknownLabel (Location loc, string label, Report Report)
{
Report.Error(159, loc, "The label `{0}:' could not be found within the scope of the goto statement",
label);
{
Iterator iterator;
public FlowBranchingIterator (FlowBranching parent, Iterator iterator)
- : base (parent, BranchingType.Iterator, SiblingType.Block, null, iterator.Location)
+ : base (parent, BranchingType.Iterator, SiblingType.Block, iterator.Block, iterator.Location)
{
this.iterator = iterator;
}
public override bool AddResumePoint (ResumableStatement stmt, Location loc, out int pc)
{
- pc = iterator.AddResumePoint (stmt, loc);
+ pc = iterator.AddResumePoint (stmt);
return false;
}
}
{
UsageVector return_origins;
- public FlowBranchingToplevel (FlowBranching parent, ToplevelBlock stmt)
+ public FlowBranchingToplevel (FlowBranching parent, ParametersBlock stmt)
: base (parent, BranchingType.Toplevel, SiblingType.Conditional, stmt, stmt.loc)
{
}
public override bool AddResumePoint (ResumableStatement stmt, Location loc, out int pc)
{
- pc = -1;
- Report.Error (-6, loc, "Internal Error: A yield in a non-iterator");
- return false;
+ throw new InternalErrorException ("A yield in a non-iterator block");
}
public override bool AddBreakOrigin (UsageVector vector, Location loc)
throw new InternalErrorException ("Shouldn't get here");
if (Parent == null) {
- Error_UnknownLabel (goto_stmt.loc, name);
+ Error_UnknownLabel (goto_stmt.loc, name, Report);
return false;
}
protected override UsageVector Merge ()
{
for (UsageVector origin = return_origins; origin != null; origin = origin.Next)
- Block.Toplevel.CheckOutParameters (origin, origin.Location);
+ Block.ParametersBlock.CheckOutParameters (origin, origin.Location);
UsageVector vector = base.Merge ();
- Block.Toplevel.CheckOutParameters (vector, Block.loc);
+ Block.ParametersBlock.CheckOutParameters (vector, Block.loc);
// Note: we _do_not_ merge in the return origins
return vector;
}
UsageVector finally_vector;
abstract class SavedOrigin {
- public SavedOrigin Next;
- public UsageVector Vector;
+ public readonly SavedOrigin Next;
+ public readonly UsageVector Vector;
- public SavedOrigin (SavedOrigin next, UsageVector vector)
+ protected SavedOrigin (SavedOrigin next, UsageVector vector)
{
Next = next;
Vector = vector.Clone ();
Parent.AddResumePoint (this.stmt, loc, out pc);
if (errors == Report.Errors) {
if (finally_vector == null)
- this.stmt.AddResumePoint (stmt, loc, pc);
+ this.stmt.AddResumePoint (stmt, pc);
else
Report.Error (1625, loc, "Cannot yield in the body of a finally clause");
}
int errors = Report.Errors;
Parent.AddReturnOrigin (vector, exit_stmt);
if (errors == Report.Errors)
- exit_stmt.Error_FinallyClause ();
+ exit_stmt.Error_FinallyClause (Report);
} else {
saved_origins = new ReturnOrigin (saved_origins, vector, exit_stmt);
}
// </summary>
public class TypeInfo
{
- public readonly Type Type;
+ public readonly TypeSpec Type;
// <summary>
// Total number of bits a variable of this type consumes in the flow vector.
// </summary>
public TypeInfo[] SubStructInfo;
- protected readonly StructInfo struct_info;
- private static Hashtable type_hash = new Hashtable ();
-
- public static TypeInfo GetTypeInfo (Type type)
+ readonly StructInfo struct_info;
+ private static Dictionary<TypeSpec, TypeInfo> type_hash;
+
+ static TypeInfo ()
{
- TypeInfo info = (TypeInfo) type_hash [type];
- if (info != null)
- return info;
-
- info = new TypeInfo (type);
- type_hash.Add (type, info);
- return info;
+ Reset ();
+ }
+
+ public static void Reset ()
+ {
+ type_hash = new Dictionary<TypeSpec, TypeInfo> ();
+ StructInfo.field_type_hash = new Dictionary<TypeSpec, StructInfo> ();
}
- public static TypeInfo GetTypeInfo (TypeContainer tc)
+ public static TypeInfo GetTypeInfo (TypeSpec type)
{
- TypeInfo info = (TypeInfo) type_hash [tc.TypeBuilder];
- if (info != null)
+ TypeInfo info;
+ if (type_hash.TryGetValue (type, out info))
return info;
- info = new TypeInfo (tc);
- type_hash.Add (tc.TypeBuilder, info);
+ info = new TypeInfo (type);
+ type_hash.Add (type, info);
return info;
}
- private TypeInfo (Type type)
+ private TypeInfo (TypeSpec type)
{
this.Type = type;
}
}
- private TypeInfo (TypeContainer tc)
- {
- this.Type = tc.TypeBuilder;
-
- struct_info = StructInfo.GetStructInfo (tc);
- if (struct_info != null) {
- Length = struct_info.Length;
- TotalLength = struct_info.TotalLength;
- SubStructInfo = struct_info.StructFields;
- IsStruct = true;
- } else {
- Length = 0;
- TotalLength = 1;
- IsStruct = false;
- }
- }
-
- protected TypeInfo (StructInfo struct_info, int offset)
+ TypeInfo (StructInfo struct_info, int offset)
{
this.struct_info = struct_info;
this.Offset = offset;
// A struct's constructor must always assign all fields.
// This method checks whether it actually does so.
// </summary>
- public bool IsFullyInitialized (FlowBranching branching, VariableInfo vi, Location loc)
+ public bool IsFullyInitialized (BlockContext ec, VariableInfo vi, Location loc)
{
if (struct_info == null)
return true;
bool ok = true;
+ FlowBranching branching = ec.CurrentBranching;
for (int i = 0; i < struct_info.Count; i++) {
- FieldInfo field = struct_info.Fields [i];
+ var field = struct_info.Fields [i];
if (!branching.IsFieldAssigned (vi, field.Name)) {
- Report.Error (171, loc,
- "Field `{0}' must be fully assigned before control leaves the constructor",
- TypeManager.GetFullNameSignature (field));
+ if (field.MemberDefinition is Property.BackingField) {
+ ec.Report.Error (843, loc,
+ "An automatically implemented property `{0}' must be fully assigned before control leaves the constructor. Consider calling the default struct contructor from a constructor initializer",
+ field.GetSignatureForError ());
+ } else {
+ ec.Report.Error (171, loc,
+ "Field `{0}' must be fully assigned before control leaves the constructor",
+ field.GetSignatureForError ());
+ }
ok = false;
}
}
Type, Offset, Length, TotalLength);
}
- protected class StructInfo {
- public readonly Type Type;
- public readonly FieldInfo[] Fields;
+ class StructInfo {
+ public readonly TypeSpec Type;
+ public readonly FieldSpec[] Fields;
public readonly TypeInfo[] StructFields;
public readonly int Count;
public readonly int CountPublic;
public readonly int TotalLength;
public readonly bool HasStructFields;
- private static Hashtable field_type_hash = new Hashtable ();
- private Hashtable struct_field_hash;
- private Hashtable field_hash;
+ public static Dictionary<TypeSpec, StructInfo> field_type_hash;
+ private Dictionary<string, TypeInfo> struct_field_hash;
+ private Dictionary<string, int> field_hash;
protected bool InTransit = false;
// Private constructor. To save memory usage, we only need to create one instance
// of this class per struct type.
- private StructInfo (Type type)
+ private StructInfo (TypeSpec type)
{
this.Type = type;
field_type_hash.Add (type, this);
- if (type is TypeBuilder) {
- TypeContainer tc = TypeManager.LookupTypeContainer (type);
+ TypeContainer tc = type.MemberDefinition as TypeContainer;
- ArrayList fields = null;
- if (tc != null)
- fields = tc.Fields;
+ var public_fields = new List<FieldSpec> ();
+ var non_public_fields = new List<FieldSpec> ();
- ArrayList public_fields = new ArrayList ();
- ArrayList non_public_fields = new ArrayList ();
+ if (tc != null) {
+ var fields = tc.Fields;
if (fields != null) {
foreach (FieldBase field in fields) {
if ((field.ModFlags & Modifiers.STATIC) != 0)
continue;
if ((field.ModFlags & Modifiers.PUBLIC) != 0)
- public_fields.Add (field.FieldBuilder);
+ public_fields.Add (field.Spec);
else
- non_public_fields.Add (field.FieldBuilder);
+ non_public_fields.Add (field.Spec);
}
}
+ }
- CountPublic = public_fields.Count;
- CountNonPublic = non_public_fields.Count;
- Count = CountPublic + CountNonPublic;
-
- Fields = new FieldInfo [Count];
- public_fields.CopyTo (Fields, 0);
- non_public_fields.CopyTo (Fields, CountPublic);
-#if GMCS_SOURCE
- } else if (type is GenericTypeParameterBuilder) {
- CountPublic = CountNonPublic = Count = 0;
+ CountPublic = public_fields.Count;
+ CountNonPublic = non_public_fields.Count;
+ Count = CountPublic + CountNonPublic;
- Fields = new FieldInfo [0];
-#endif
- } else {
- FieldInfo[] public_fields = type.GetFields (
- BindingFlags.Instance|BindingFlags.Public);
- FieldInfo[] non_public_fields = type.GetFields (
- BindingFlags.Instance|BindingFlags.NonPublic);
-
- CountPublic = public_fields.Length;
- CountNonPublic = non_public_fields.Length;
- Count = CountPublic + CountNonPublic;
-
- Fields = new FieldInfo [Count];
- public_fields.CopyTo (Fields, 0);
- non_public_fields.CopyTo (Fields, CountPublic);
- }
+ Fields = new FieldSpec[Count];
+ public_fields.CopyTo (Fields, 0);
+ non_public_fields.CopyTo (Fields, CountPublic);
- struct_field_hash = new Hashtable ();
- field_hash = new Hashtable ();
+ struct_field_hash = new Dictionary<string, TypeInfo> ();
+ field_hash = new Dictionary<string, int> ();
Length = 0;
StructFields = new TypeInfo [Count];
InTransit = true;
for (int i = 0; i < Count; i++) {
- FieldInfo field = (FieldInfo) Fields [i];
+ var field = Fields [i];
- sinfo [i] = GetStructInfo (field.FieldType);
+ sinfo [i] = GetStructInfo (field.MemberType);
if (sinfo [i] == null)
field_hash.Add (field.Name, ++Length);
else if (sinfo [i].InTransit) {
- Report.Error (523, String.Format (
- "Struct member `{0}.{1}' of type `{2}' causes " +
- "a cycle in the structure layout",
- type, field.Name, sinfo [i].Type));
sinfo [i] = null;
return;
}
TotalLength = Length + 1;
for (int i = 0; i < Count; i++) {
- FieldInfo field = (FieldInfo) Fields [i];
+ var field = Fields [i];
if (sinfo [i] == null)
continue;
public int this [string name] {
get {
- if (field_hash.Contains (name))
- return (int) field_hash [name];
- else
+ int val;
+ if (!field_hash.TryGetValue (name, out val))
return 0;
+
+ return val;
}
}
public TypeInfo GetStructField (string name)
{
- return (TypeInfo) struct_field_hash [name];
+ TypeInfo ti;
+ if (struct_field_hash.TryGetValue (name, out ti))
+ return ti;
+
+ return null;
}
- public static StructInfo GetStructInfo (Type type)
+ public static StructInfo GetStructInfo (TypeSpec type)
{
- if (!TypeManager.IsValueType (type) || TypeManager.IsEnumType (type) ||
- TypeManager.IsBuiltinType (type))
+ if (!type.IsStruct || TypeManager.IsBuiltinType (type))
return null;
- StructInfo info = (StructInfo) field_type_hash [type];
- if (info != null)
+ StructInfo info;
+ if (field_type_hash.TryGetValue (type, out info))
return info;
return new StructInfo (type);
}
-
- public static StructInfo GetStructInfo (TypeContainer tc)
- {
- StructInfo info = (StructInfo) field_type_hash [tc.TypeBuilder];
- if (info != null)
- return info;
-
- return new StructInfo (tc.TypeBuilder);
- }
}
}
// </summary>
public readonly bool IsParameter;
- public readonly LocalInfo LocalInfo;
+ public readonly LocalVariable LocalInfo;
readonly VariableInfo Parent;
VariableInfo[] sub_info;
get { return is_ever_assigned; }
}
- protected VariableInfo (string name, Type type, int offset)
+ protected VariableInfo (string name, TypeSpec type, int offset)
{
this.Name = name;
this.Offset = offset;
sub_info = new VariableInfo [0];
}
- public VariableInfo (LocalInfo local_info, int offset)
- : this (local_info.Name, local_info.VariableType, offset)
+ public VariableInfo (LocalVariable local_info, int offset)
+ : this (local_info.Name, local_info.Type, offset)
{
this.LocalInfo = local_info;
this.IsParameter = false;
}
- public VariableInfo (Parameters ip, int i, int offset)
- : this (ip.ParameterName (i), TypeManager.GetElementType (ip.ParameterType (i)), offset)
+ public VariableInfo (ParametersCompiled ip, int i, int offset)
+ : this (ip.FixedParameters [i].Name, ip.Types [i], offset)
{
this.IsParameter = true;
}
- public bool IsAssigned (EmitContext ec)
+ public bool IsAssigned (ResolveContext ec)
{
return !ec.DoFlowAnalysis ||
- ec.OmitStructFlowAnalysis && TypeInfo.IsStruct ||
+ (ec.OmitStructFlowAnalysis && TypeInfo.Type.IsStruct) ||
ec.CurrentBranching.IsAssigned (this);
}
- public bool IsAssigned (EmitContext ec, Location loc)
+ public bool IsAssigned (ResolveContext ec, Location loc)
{
if (IsAssigned (ec))
return true;
- Report.Error (165, loc,
+ ec.Report.Error (165, loc,
"Use of unassigned local variable `" + Name + "'");
ec.CurrentBranching.SetAssigned (this);
return false;
return true;
}
- public void SetAssigned (EmitContext ec)
+ public void SetAssigned (ResolveContext ec)
{
if (ec.DoFlowAnalysis)
ec.CurrentBranching.SetAssigned (this);
is_ever_assigned = true;
}
- public bool IsFieldAssigned (EmitContext ec, string name, Location loc)
+ public bool IsFieldAssigned (ResolveContext ec, string name, Location loc)
{
if (!ec.DoFlowAnalysis ||
ec.OmitStructFlowAnalysis && TypeInfo.IsStruct ||
ec.CurrentBranching.IsFieldAssigned (this, name))
return true;
- Report.Error (170, loc,
+ ec.Report.Error (170, loc,
"Use of possibly unassigned field `" + name + "'");
ec.CurrentBranching.SetFieldAssigned (this, name);
return false;
return vector [Offset + field_idx];
}
- public void SetFieldAssigned (EmitContext ec, string name)
+ public void SetFieldAssigned (ResolveContext ec, string name)
{
if (ec.DoFlowAnalysis)
ec.CurrentBranching.SetFieldAssigned (this, name);
// Invariant: vector == null || shared == null
// i.e., at most one of 'vector' and 'shared' can be non-null. They can both be null -- that means all-ones
// The object in 'shared' cannot be modified, while 'vector' can be freely modified
- BitArray vector, shared;
+ System.Collections.BitArray vector, shared;
MyBitVector ()
{
- shared = new BitArray (0, false);
+ shared = new System.Collections.BitArray (0, false);
}
public MyBitVector (MyBitVector InheritsFrom, int Count)
{
if (InheritsFrom != null)
- shared = InheritsFrom.Shared;
+ shared = InheritsFrom.MakeShared (Count);
this.Count = Count;
}
- // Use this accessor to get a shareable copy of the underlying BitArray representation
- BitArray Shared {
- get {
- // Post-condition: vector == null
- if (shared == null) {
- shared = vector;
- vector = null;
- }
- return shared;
+ System.Collections.BitArray MakeShared (int new_count)
+ {
+ // Post-condition: vector == null
+
+ // ensure we don't leak out dirty bits from the BitVector we inherited from
+ if (new_count > Count &&
+ ((shared != null && shared.Count > Count) ||
+ (shared == null && vector == null)))
+ initialize_vector ();
+
+ if (vector != null) {
+ shared = vector;
+ vector = null;
}
+
+ return shared;
}
// <summary>
public bool this [int index] {
get {
if (index >= Count)
- throw new ArgumentOutOfRangeException ();
+ // FIXME: Disabled due to missing anonymous method flow analysis
+ // throw new ArgumentOutOfRangeException ();
+ return true;
if (vector != null)
return vector [index];
if (Count == 0 || new_vector.Count == 0)
return this;
- BitArray o = new_vector.vector != null ? new_vector.vector : new_vector.shared;
+ var o = new_vector.vector != null ? new_vector.vector : new_vector.shared;
if (o == null) {
int n = new_vector.Count;
if (Count == 0)
return this;
- BitArray o = new_vector.vector != null ? new_vector.vector : new_vector.shared;
+ var o = new_vector.vector != null ? new_vector.vector : new_vector.shared;
if (o == null) {
for (int i = new_vector.Count; i < Count; ++i)
if (Count == o.Count) {
if (vector == null) {
if (shared == null) {
- shared = new_vector.Shared;
+ shared = new_vector.MakeShared (Count);
return this;
}
initialize_vector ();
public void SetRange (int offset, int length)
{
if (offset > Count || offset + length > Count)
- throw new ArgumentOutOfRangeException ();
+ throw new ArgumentOutOfRangeException ("flow-analysis");
if (shared == null && vector == null)
return;
// Don't clobber Empty
if (Count == 0)
return;
- shared = value ? null : Empty.Shared;
+ shared = value ? null : Empty.MakeShared (Count);
vector = null;
}
{
// Post-condition: vector != null
if (shared == null) {
- vector = new BitArray (Count, true);
+ vector = new System.Collections.BitArray (Count, true);
return;
}
- vector = new BitArray (shared);
+ vector = new System.Collections.BitArray (shared);
if (Count != vector.Count)
vector.Length = Count;
shared = null;
StringBuilder Dump (StringBuilder sb)
{
- BitArray dump = vector == null ? shared : vector;
+ var dump = vector == null ? shared : vector;
if (dump == null)
return sb.Append ("/");
if (dump == shared)
projects / mono.git / blobdiff