//
// codegen.cs: The code generator
//
// Author:
// Miguel de Icaza (miguel@ximian.com)
//
// (C) 2001, 2002, 2003 Ximian, Inc.
// (C) 2004 Novell, Inc.
//
//
// Please leave this defined on SVN: The idea is that when we ship the
// compiler to end users, if the compiler crashes, they have a chance
// to narrow down the problem.
//
// Only remove it if you need to debug locally on your tree.
//
//#define PRODUCTION
using System;
using System.IO;
using System.Collections;
using System.Collections.Specialized;
using System.Reflection;
using System.Reflection.Emit;
using System.Runtime.InteropServices;
using System.Security;
using System.Security.Cryptography;
using System.Security.Permissions;
using Mono.Security.Cryptography;
namespace Mono.CSharp {
///
/// Code generator class.
///
public class CodeGen {
static AppDomain current_domain;
static public SymbolWriter SymbolWriter;
public static AssemblyClass Assembly;
public static ModuleClass Module;
static CodeGen ()
{
Reset ();
}
public static void Reset ()
{
Assembly = new AssemblyClass ();
Module = new ModuleClass (RootContext.Unsafe);
}
public static string Basename (string name)
{
int pos = name.LastIndexOf ('/');
if (pos != -1)
return name.Substring (pos + 1);
pos = name.LastIndexOf ('\\');
if (pos != -1)
return name.Substring (pos + 1);
return name;
}
public static string Dirname (string name)
{
int pos = name.LastIndexOf ('/');
if (pos != -1)
return name.Substring (0, pos);
pos = name.LastIndexOf ('\\');
if (pos != -1)
return name.Substring (0, pos);
return ".";
}
static public string FileName;
//
// Initializes the symbol writer
//
static void InitializeSymbolWriter (string filename)
{
SymbolWriter = SymbolWriter.GetSymbolWriter (Module.Builder, filename);
//
// If we got an ISymbolWriter instance, initialize it.
//
if (SymbolWriter == null) {
Report.Warning (
-18, 1, "Could not find the symbol writer assembly (Mono.CompilerServices.SymbolWriter.dll). This is normally an installation problem. Please make sure to compile and install the mcs/class/Mono.CompilerServices.SymbolWriter directory.");
return;
}
}
//
// Initializes the code generator variables
//
static public bool Init (string name, string output, bool want_debugging_support)
{
FileName = output;
AssemblyName an = Assembly.GetAssemblyName (name, output);
if (an == null)
return false;
if (an.KeyPair != null) {
// If we are going to strong name our assembly make
// sure all its refs are strong named
foreach (Assembly a in RootNamespace.Global.Assemblies) {
AssemblyName ref_name = a.GetName ();
byte [] b = ref_name.GetPublicKeyToken ();
if (b == null || b.Length == 0) {
Report.Error (1577, "Assembly generation failed " +
"-- Referenced assembly '" +
ref_name.Name +
"' does not have a strong name.");
//Environment.Exit (1);
}
}
}
current_domain = AppDomain.CurrentDomain;
try {
Assembly.Builder = current_domain.DefineDynamicAssembly (an,
AssemblyBuilderAccess.Save, Dirname (name));
}
catch (ArgumentException) {
// specified key may not be exportable outside it's container
if (RootContext.StrongNameKeyContainer != null) {
Report.Error (1548, "Could not access the key inside the container `" +
RootContext.StrongNameKeyContainer + "'.");
Environment.Exit (1);
}
return false;
}
catch (CryptographicException) {
if ((RootContext.StrongNameKeyContainer != null) || (RootContext.StrongNameKeyFile != null)) {
Report.Error (1548, "Could not use the specified key to strongname the assembly.");
Environment.Exit (1);
}
return false;
}
#if GMCS_SOURCE
// Get the complete AssemblyName from the builder
// (We need to get the public key and token)
Assembly.Name = Assembly.Builder.GetName ();
#endif
//
// Pass a path-less name to DefineDynamicModule. Wonder how
// this copes with output in different directories then.
// FIXME: figure out how this copes with --output /tmp/blah
//
// If the third argument is true, the ModuleBuilder will dynamically
// load the default symbol writer.
//
Module.Builder = Assembly.Builder.DefineDynamicModule (
Basename (name), Basename (output), false);
if (want_debugging_support)
InitializeSymbolWriter (output);
return true;
}
static public void Save (string name)
{
try {
Assembly.Builder.Save (Basename (name));
if (SymbolWriter != null)
SymbolWriter.WriteSymbolFile ();
}
catch (COMException) {
if ((RootContext.StrongNameKeyFile == null) || (!RootContext.StrongNameDelaySign))
throw;
// FIXME: it seems Microsoft AssemblyBuilder doesn't like to delay sign assemblies
Report.Error (1548, "Couldn't delay-sign the assembly with the '" +
RootContext.StrongNameKeyFile +
"', Use MCS with the Mono runtime or CSC to compile this assembly.");
}
catch (System.IO.IOException io) {
Report.Error (16, "Could not write to file `"+name+"', cause: " + io.Message);
}
catch (System.UnauthorizedAccessException ua) {
Report.Error (16, "Could not write to file `"+name+"', cause: " + ua.Message);
}
}
}
public interface IResolveContext
{
DeclSpace DeclContainer { get; }
bool IsInObsoleteScope { get; }
bool IsInUnsafeScope { get; }
// the declcontainer to lookup for type-parameters. Should only use LookupGeneric on it.
//
// FIXME: This is somewhat of a hack. We don't need a full DeclSpace for this. We just need the
// current type parameters in scope. IUIC, that will require us to rewrite GenericMethod.
// Maybe we can replace this with a 'LookupGeneric (string)' instead, but we'll have to
// handle generic method overrides differently
DeclSpace GenericDeclContainer { get; }
}
///
/// An Emit Context is created for each body of code (from methods,
/// properties bodies, indexer bodies or constructor bodies)
///
public class EmitContext : IResolveContext {
DeclSpace decl_space;
public DeclSpace TypeContainer;
public ILGenerator ig;
[Flags]
public enum Flags : byte {
///
/// This flag tracks the `checked' state of the compilation,
/// it controls whether we should generate code that does overflow
/// checking, or if we generate code that ignores overflows.
///
/// The default setting comes from the command line option to generate
/// checked or unchecked code plus any source code changes using the
/// checked/unchecked statements or expressions. Contrast this with
/// the ConstantCheckState flag.
///
CheckState = 1 << 0,
///
/// The constant check state is always set to `true' and cant be changed
/// from the command line. The source code can change this setting with
/// the `checked' and `unchecked' statements and expressions.
///
ConstantCheckState = 1 << 1,
AllCheckStateFlags = CheckState | ConstantCheckState,
///
/// Whether we are inside an unsafe block
///
InUnsafe = 1 << 2,
InCatch = 1 << 3,
InFinally = 1 << 4,
///
/// Whether control flow analysis is enabled
///
DoFlowAnalysis = 1 << 5,
///
/// Whether control flow analysis is disabled on structs
/// (only meaningful when DoFlowAnalysis is set)
///
OmitStructFlowAnalysis = 1 << 6,
///
/// Indicates the current context is in probing mode, no errors are reported.
///
ProbingMode = 1 << 7
}
Flags flags;
///
/// Whether we are emitting code inside a static or instance method
///
public bool IsStatic;
///
/// Whether the actual created method is static or instance method.
/// Althoug the method might be declared as `static', if an anonymous
/// method is involved, we might turn this into an instance method.
///
/// So this reflects the low-level staticness of the method, while
/// IsStatic represents the semantic, high-level staticness.
///
public bool MethodIsStatic;
///
/// Whether we are emitting a field initializer
///
public bool IsFieldInitializer;
///
/// If this is true, then Return and ContextualReturn statements
/// will set the ReturnType value based on the expression types
/// of each return statement instead of the method return type
/// (which is initially null).
///
public bool InferReturnType;
///
/// The value that is allowed to be returned or NULL if there is no
/// return type.
///
Type return_type;
///
/// Points to the Type (extracted from the TypeContainer) that
/// declares this body of code
///
public Type ContainerType;
///
/// Whether this is generating code for a constructor
///
public bool IsConstructor;
///
/// Keeps track of the Type to LocalBuilder temporary storage created
/// to store structures (used to compute the address of the structure
/// value on structure method invocations)
///
public Hashtable temporary_storage;
public Block CurrentBlock;
public int CurrentFile;
///
/// The location where we store the return value.
///
LocalBuilder return_value;
///
/// The location where return has to jump to return the
/// value
///
public Label ReturnLabel;
///
/// If we already defined the ReturnLabel
///
public bool HasReturnLabel;
///
/// Whether we are inside an iterator block.
///
public bool InIterator;
///
/// Whether we are in a `fixed' initialization
///
public bool InFixedInitializer;
///
/// Whether we are inside an anonymous method.
///
public AnonymousContainer CurrentAnonymousMethod;
///
/// Location for this EmitContext
///
public Location loc;
///
/// Inside an enum definition, we do not resolve enumeration values
/// to their enumerations, but rather to the underlying type/value
/// This is so EnumVal + EnumValB can be evaluated.
///
/// There is no "E operator + (E x, E y)", so during an enum evaluation
/// we relax the rules
///
public bool InEnumContext;
public readonly IResolveContext ResolveContext;
///
/// The current iterator
///
public Iterator CurrentIterator {
get { return CurrentAnonymousMethod as Iterator; }
}
///
/// Whether we are in the resolving stage or not
///
enum Phase {
Created,
Resolving,
Emitting
}
public static EmitContext TempEc;
bool isAnonymousMethodAllowed = true;
Phase current_phase;
FlowBranching current_flow_branching;
static int next_id = 0;
int id = ++next_id;
public override string ToString ()
{
return String.Format ("EmitContext ({0}:{1})", id,
CurrentAnonymousMethod, loc);
}
public EmitContext (IResolveContext rc, DeclSpace parent, DeclSpace ds, Location l, ILGenerator ig,
Type return_type, int code_flags, bool is_constructor)
{
this.ResolveContext = rc;
this.ig = ig;
TypeContainer = parent;
this.decl_space = ds;
if (RootContext.Checked)
flags |= Flags.CheckState;
flags |= Flags.ConstantCheckState;
if (return_type == null)
throw new ArgumentNullException ("return_type");
#if GMCS_SOURCE
if ((return_type is TypeBuilder) && return_type.IsGenericTypeDefinition)
throw new InternalErrorException ();
#endif
IsStatic = (code_flags & Modifiers.STATIC) != 0;
MethodIsStatic = IsStatic;
InIterator = (code_flags & Modifiers.METHOD_YIELDS) != 0;
ReturnType = return_type;
IsConstructor = is_constructor;
CurrentBlock = null;
CurrentFile = 0;
current_phase = Phase.Created;
if (parent != null){
// Can only be null for the ResolveType contexts.
ContainerType = parent.TypeBuilder;
if (rc.IsInUnsafeScope)
flags |= Flags.InUnsafe;
}
loc = l;
}
public EmitContext (IResolveContext rc, DeclSpace ds, Location l, ILGenerator ig,
Type return_type, int code_flags, bool is_constructor)
: this (rc, ds, ds, l, ig, return_type, code_flags, is_constructor)
{
}
public EmitContext (IResolveContext rc, DeclSpace ds, Location l, ILGenerator ig,
Type return_type, int code_flags)
: this (rc, ds, ds, l, ig, return_type, code_flags, false)
{
}
public DeclSpace DeclContainer {
get { return decl_space; }
set { decl_space = value; }
}
public DeclSpace GenericDeclContainer {
get { return DeclContainer; }
}
public bool CheckState {
get { return (flags & Flags.CheckState) != 0; }
}
public bool ConstantCheckState {
get { return (flags & Flags.ConstantCheckState) != 0; }
}
public bool InUnsafe {
get { return (flags & Flags.InUnsafe) != 0; }
}
public bool InCatch {
get { return (flags & Flags.InCatch) != 0; }
}
public bool InFinally {
get { return (flags & Flags.InFinally) != 0; }
}
public bool DoFlowAnalysis {
get { return (flags & Flags.DoFlowAnalysis) != 0; }
}
public bool OmitStructFlowAnalysis {
get { return (flags & Flags.OmitStructFlowAnalysis) != 0; }
}
// utility helper for CheckExpr, UnCheckExpr, Checked and Unchecked statements
// it's public so that we can use a struct at the callsite
public struct FlagsHandle : IDisposable
{
EmitContext ec;
readonly Flags invmask, oldval;
public FlagsHandle (EmitContext ec, Flags flagsToSet)
: this (ec, flagsToSet, flagsToSet)
{
}
internal FlagsHandle (EmitContext ec, Flags mask, Flags val)
{
this.ec = ec;
invmask = ~mask;
oldval = ec.flags & mask;
ec.flags = (ec.flags & invmask) | (val & mask);
if ((mask & Flags.ProbingMode) != 0)
Report.DisableReporting ();
}
public void Dispose ()
{
if ((invmask & Flags.ProbingMode) == 0)
Report.EnableReporting ();
ec.flags = (ec.flags & invmask) | oldval;
}
}
// Temporarily set all the given flags to the given value. Should be used in an 'using' statement
public FlagsHandle Set (Flags flagsToSet)
{
return new FlagsHandle (this, flagsToSet);
}
public FlagsHandle With (Flags bits, bool enable)
{
return new FlagsHandle (this, bits, enable ? bits : 0);
}
public FlagsHandle WithFlowAnalysis (bool do_flow_analysis, bool omit_struct_analysis)
{
Flags newflags =
(do_flow_analysis ? Flags.DoFlowAnalysis : 0) |
(omit_struct_analysis ? Flags.OmitStructFlowAnalysis : 0);
return new FlagsHandle (this, Flags.DoFlowAnalysis | Flags.OmitStructFlowAnalysis, newflags);
}
public bool IsInObsoleteScope {
get {
// Disables obsolete checks when probing is on
return IsInProbingMode || ResolveContext.IsInObsoleteScope;
}
}
public bool IsInProbingMode {
get { return (flags & Flags.ProbingMode) != 0; }
}
public bool IsInUnsafeScope {
get { return InUnsafe || ResolveContext.IsInUnsafeScope; }
}
public bool IsAnonymousMethodAllowed {
get { return isAnonymousMethodAllowed; }
set { isAnonymousMethodAllowed = value; }
}
public FlowBranching CurrentBranching {
get { return current_flow_branching; }
}
//
// Starts a new code branching. This inherits the state of all local
// variables and parameters from the current branching.
//
public FlowBranching StartFlowBranching (FlowBranching.BranchingType type, Location loc)
{
current_flow_branching = FlowBranching.CreateBranching (CurrentBranching, type, null, loc);
return current_flow_branching;
}
//
// Starts a new code branching for block `block'.
//
public FlowBranching StartFlowBranching (Block block)
{
FlowBranching.BranchingType type;
if ((CurrentBranching != null) &&
(CurrentBranching.Type == FlowBranching.BranchingType.Switch))
type = FlowBranching.BranchingType.SwitchSection;
else
type = FlowBranching.BranchingType.Block;
flags |= Flags.DoFlowAnalysis;
current_flow_branching = FlowBranching.CreateBranching (
CurrentBranching, type, block, block.StartLocation);
return current_flow_branching;
}
public FlowBranchingException StartFlowBranching (ExceptionStatement stmt)
{
FlowBranchingException branching = new FlowBranchingException (CurrentBranching, stmt);
current_flow_branching = branching;
return branching;
}
public FlowBranchingLabeled StartFlowBranching (LabeledStatement stmt)
{
FlowBranchingLabeled branching = new FlowBranchingLabeled (CurrentBranching, stmt);
current_flow_branching = branching;
return branching;
}
public FlowBranchingToplevel StartFlowBranching (ToplevelBlock stmt)
{
FlowBranchingToplevel branching = new FlowBranchingToplevel (CurrentBranching, stmt);
current_flow_branching = branching;
return branching;
}
//
// Ends a code branching. Merges the state of locals and parameters
// from all the children of the ending branching.
//
public FlowBranching.UsageVector DoEndFlowBranching ()
{
FlowBranching old = current_flow_branching;
current_flow_branching = current_flow_branching.Parent;
return current_flow_branching.MergeChild (old);
}
//
// Ends a code branching. Merges the state of locals and parameters
// from all the children of the ending branching.
//
public bool EndFlowBranching ()
{
FlowBranching.UsageVector vector = DoEndFlowBranching ();
return vector.IsUnreachable;
}
//
// Kills the current code branching. This throws away any changed state
// information and should only be used in case of an error.
//
public void KillFlowBranching ()
{
current_flow_branching = current_flow_branching.Parent;
}
public bool MustCaptureVariable (LocalInfo local)
{
if (CurrentAnonymousMethod == null)
return false;
if (CurrentAnonymousMethod.IsIterator)
return true;
return local.Block.Toplevel != CurrentBlock.Toplevel;
}
public void EmitMeta (ToplevelBlock b)
{
b.EmitMeta (this);
if (HasReturnLabel)
ReturnLabel = ig.DefineLabel ();
}
//
// Here until we can fix the problem with Mono.CSharp.Switch, which
// currently can not cope with ig == null during resolve (which must
// be fixed for switch statements to work on anonymous methods).
//
public void EmitTopBlock (IMethodData md, ToplevelBlock block)
{
if (block == null)
return;
bool unreachable;
if (ResolveTopBlock (null, block, md.ParameterInfo, md, out unreachable)){
EmitMeta (block);
current_phase = Phase.Emitting;
EmitResolvedTopBlock (block, unreachable);
}
}
bool resolved;
public bool ResolveTopBlock (EmitContext anonymous_method_host, ToplevelBlock block,
Parameters ip, IMethodData md, out bool unreachable)
{
current_phase = Phase.Resolving;
unreachable = false;
if (resolved)
return true;
if (!loc.IsNull)
CurrentFile = loc.File;
#if PRODUCTION
try {
#endif
if (!block.ResolveMeta (this, ip))
return false;
if ((md != null) && (md.Iterator != null)) {
if (!md.Iterator.Resolve (this))
return false;
}
using (this.With (EmitContext.Flags.DoFlowAnalysis, true)) {
FlowBranchingToplevel top_level;
if (anonymous_method_host != null)
top_level = new FlowBranchingToplevel (anonymous_method_host.CurrentBranching, block);
else
top_level = block.TopLevelBranching;
current_flow_branching = top_level;
bool ok = block.Resolve (this);
current_flow_branching = null;
if (!ok)
return false;
bool flow_unreachable = top_level.End ();
if (flow_unreachable)
unreachable = true;
}
#if PRODUCTION
} catch (Exception e) {
Console.WriteLine ("Exception caught by the compiler while compiling:");
Console.WriteLine (" Block that caused the problem begin at: " + loc);
if (CurrentBlock != null){
Console.WriteLine (" Block being compiled: [{0},{1}]",
CurrentBlock.StartLocation, CurrentBlock.EndLocation);
}
Console.WriteLine (e.GetType ().FullName + ": " + e.Message);
throw;
}
#endif
if (return_type != TypeManager.void_type && !unreachable) {
if (CurrentAnonymousMethod == null) {
Report.Error (161, md.Location, "`{0}': not all code paths return a value", md.GetSignatureForError ());
return false;
} else if (!CurrentAnonymousMethod.IsIterator) {
Report.Error (1643, CurrentAnonymousMethod.Location, "Not all code paths return a value in anonymous method of type `{0}'",
CurrentAnonymousMethod.GetSignatureForError ());
return false;
}
}
if (!block.CompleteContexts (this))
return false;
resolved = true;
return true;
}
public Type ReturnType {
set {
return_type = value;
}
get {
return return_type;
}
}
public void EmitResolvedTopBlock (ToplevelBlock block, bool unreachable)
{
if (block != null)
block.Emit (this);
if (HasReturnLabel)
ig.MarkLabel (ReturnLabel);
if (return_value != null){
ig.Emit (OpCodes.Ldloc, return_value);
ig.Emit (OpCodes.Ret);
} else {
//
// If `HasReturnLabel' is set, then we already emitted a
// jump to the end of the method, so we must emit a `ret'
// there.
//
// Unfortunately, System.Reflection.Emit automatically emits
// a leave to the end of a finally block. This is a problem
// if no code is following the try/finally block since we may
// jump to a point after the end of the method.
// As a workaround, we're always creating a return label in
// this case.
//
bool in_iterator = (CurrentAnonymousMethod != null) &&
CurrentAnonymousMethod.IsIterator && InIterator;
if ((block != null) && block.IsDestructor) {
// Nothing to do; S.R.E automatically emits a leave.
} else if (HasReturnLabel || (!unreachable && !in_iterator)) {
if (return_type != TypeManager.void_type)
ig.Emit (OpCodes.Ldloc, TemporaryReturn ());
ig.Emit (OpCodes.Ret);
}
}
}
///
/// This is called immediately before emitting an IL opcode to tell the symbol
/// writer to which source line this opcode belongs.
///
public void Mark (Location loc, bool check_file)
{
if ((CodeGen.SymbolWriter == null) || loc.IsNull)
return;
if (check_file && (CurrentFile != loc.File))
return;
CodeGen.SymbolWriter.MarkSequencePoint (ig, loc.Row, loc.Column);
}
public void DefineLocalVariable (string name, LocalBuilder builder)
{
if (CodeGen.SymbolWriter == null)
return;
CodeGen.SymbolWriter.DefineLocalVariable (name, builder);
}
public void BeginScope ()
{
ig.BeginScope();
if (CodeGen.SymbolWriter != null)
CodeGen.SymbolWriter.OpenScope(ig);
}
public void EndScope ()
{
ig.EndScope();
if (CodeGen.SymbolWriter != null)
CodeGen.SymbolWriter.CloseScope(ig);
}
///
/// Returns a temporary storage for a variable of type t as
/// a local variable in the current body.
///
public LocalBuilder GetTemporaryLocal (Type t)
{
if (temporary_storage != null) {
object o = temporary_storage [t];
if (o != null) {
if (o is Stack) {
Stack s = (Stack) o;
o = s.Count == 0 ? null : s.Pop ();
} else {
temporary_storage.Remove (t);
}
}
if (o != null)
return (LocalBuilder) o;
}
return ig.DeclareLocal (t);
}
public void FreeTemporaryLocal (LocalBuilder b, Type t)
{
Stack s;
if (temporary_storage == null) {
temporary_storage = new Hashtable ();
temporary_storage [t] = b;
return;
}
object o = temporary_storage [t];
if (o == null) {
temporary_storage [t] = b;
return;
}
if (o is Stack) {
s = (Stack) o;
} else {
s = new Stack ();
s.Push (o);
temporary_storage [t] = s;
}
s.Push (b);
}
///
/// Current loop begin and end labels.
///
public Label LoopBegin, LoopEnd;
///
/// Default target in a switch statement. Only valid if
/// InSwitch is true
///
public Label DefaultTarget;
///
/// If this is non-null, points to the current switch statement
///
public Switch Switch;
///
/// ReturnValue creates on demand the LocalBuilder for the
/// return value from the function. By default this is not
/// used. This is only required when returns are found inside
/// Try or Catch statements.
///
/// This method is typically invoked from the Emit phase, so
/// we allow the creation of a return label if it was not
/// requested during the resolution phase. Could be cleaned
/// up, but it would replicate a lot of logic in the Emit phase
/// of the code that uses it.
///
public LocalBuilder TemporaryReturn ()
{
if (return_value == null){
return_value = ig.DeclareLocal (return_type);
if (!HasReturnLabel){
ReturnLabel = ig.DefineLabel ();
HasReturnLabel = true;
}
}
return return_value;
}
///
/// This method is used during the Resolution phase to flag the
/// need to define the ReturnLabel
///
public void NeedReturnLabel ()
{
if (current_phase != Phase.Resolving){
//
// The reason is that the `ReturnLabel' is declared between
// resolution and emission
//
throw new Exception ("NeedReturnLabel called from Emit phase, should only be called during Resolve");
}
if (!InIterator && !HasReturnLabel)
HasReturnLabel = true;
}
public Expression GetThis (Location loc)
{
This my_this;
if (CurrentBlock != null)
my_this = new This (CurrentBlock, loc);
else
my_this = new This (loc);
if (!my_this.ResolveBase (this))
my_this = null;
return my_this;
}
}
public abstract class CommonAssemblyModulClass : Attributable, IResolveContext {
protected CommonAssemblyModulClass ():
base (null)
{
}
public void AddAttributes (ArrayList attrs)
{
foreach (Attribute a in attrs)
a.AttachTo (this);
if (attributes == null) {
attributes = new Attributes (attrs);
return;
}
attributes.AddAttributes (attrs);
}
public virtual void Emit (TypeContainer tc)
{
if (OptAttributes == null)
return;
OptAttributes.Emit ();
}
protected Attribute ResolveAttribute (Type a_type)
{
Attribute a = OptAttributes.Search (a_type);
if (a != null) {
a.Resolve ();
}
return a;
}
public override IResolveContext ResolveContext {
get { return this; }
}
#region IResolveContext Members
public DeclSpace DeclContainer {
get { return RootContext.ToplevelTypes; }
}
public DeclSpace GenericDeclContainer {
get { return DeclContainer; }
}
public bool IsInObsoleteScope {
get { return false; }
}
public bool IsInUnsafeScope {
get { return false; }
}
#endregion
}
public class AssemblyClass : CommonAssemblyModulClass {
// TODO: make it private and move all builder based methods here
public AssemblyBuilder Builder;
bool is_cls_compliant;
bool wrap_non_exception_throws;
public Attribute ClsCompliantAttribute;
ListDictionary declarative_security;
#if GMCS_SOURCE
bool has_extension_method;
public AssemblyName Name;
MethodInfo add_type_forwarder;
ListDictionary emitted_forwarders;
#endif
// Module is here just because of error messages
static string[] attribute_targets = new string [] { "assembly", "module" };
public AssemblyClass (): base ()
{
#if GMCS_SOURCE
wrap_non_exception_throws = true;
#endif
}
public bool HasExtensionMethods {
set {
#if GMCS_SOURCE
has_extension_method = value;
#endif
}
}
public bool IsClsCompliant {
get {
return is_cls_compliant;
}
}
public bool WrapNonExceptionThrows {
get {
return wrap_non_exception_throws;
}
}
public override AttributeTargets AttributeTargets {
get {
return AttributeTargets.Assembly;
}
}
public override bool IsClsComplianceRequired ()
{
return is_cls_compliant;
}
public void Resolve ()
{
if (OptAttributes == null)
return;
// Ensure that we only have GlobalAttributes, since the Search isn't safe with other types.
if (!OptAttributes.CheckTargets())
return;
ClsCompliantAttribute = ResolveAttribute (TypeManager.cls_compliant_attribute_type);
if (ClsCompliantAttribute != null) {
is_cls_compliant = ClsCompliantAttribute.GetClsCompliantAttributeValue ();
}
#if GMCS_SOURCE
Attribute a = ResolveAttribute (TypeManager.runtime_compatibility_attr_type);
if (a != null) {
object val = a.GetPropertyValue ("WrapNonExceptionThrows");
if (val != null)
wrap_non_exception_throws = (bool)val;
}
#endif
}
// fix bug #56621
private void SetPublicKey (AssemblyName an, byte[] strongNameBlob)
{
try {
// check for possible ECMA key
if (strongNameBlob.Length == 16) {
// will be rejected if not "the" ECMA key
an.SetPublicKey (strongNameBlob);
}
else {
// take it, with or without, a private key
RSA rsa = CryptoConvert.FromCapiKeyBlob (strongNameBlob);
// and make sure we only feed the public part to Sys.Ref
byte[] publickey = CryptoConvert.ToCapiPublicKeyBlob (rsa);
// AssemblyName.SetPublicKey requires an additional header
byte[] publicKeyHeader = new byte [12] { 0x00, 0x24, 0x00, 0x00, 0x04, 0x80, 0x00, 0x00, 0x94, 0x00, 0x00, 0x00 };
byte[] encodedPublicKey = new byte [12 + publickey.Length];
Buffer.BlockCopy (publicKeyHeader, 0, encodedPublicKey, 0, 12);
Buffer.BlockCopy (publickey, 0, encodedPublicKey, 12, publickey.Length);
an.SetPublicKey (encodedPublicKey);
}
}
catch (Exception) {
Error_AssemblySigning ("The specified file `" + RootContext.StrongNameKeyFile + "' is incorrectly encoded");
Environment.Exit (1);
}
}
// TODO: rewrite this code (to kill N bugs and make it faster) and use standard ApplyAttribute way.
public AssemblyName GetAssemblyName (string name, string output)
{
if (OptAttributes != null) {
foreach (Attribute a in OptAttributes.Attrs) {
// cannot rely on any resolve-based members before you call Resolve
if (a.ExplicitTarget == null || a.ExplicitTarget != "assembly")
continue;
// TODO: This code is buggy: comparing Attribute name without resolving is wrong.
// However, this is invoked by CodeGen.Init, when none of the namespaces
// are loaded yet.
// TODO: Does not handle quoted attributes properly
switch (a.Name) {
case "AssemblyKeyFile":
case "AssemblyKeyFileAttribute":
case "System.Reflection.AssemblyKeyFileAttribute":
if (RootContext.StrongNameKeyFile != null) {
Report.SymbolRelatedToPreviousError (a.Location, a.Name);
Report.Warning (1616, 1, "Option `{0}' overrides attribute `{1}' given in a source file or added module",
"keyfile", "System.Reflection.AssemblyKeyFileAttribute");
}
else {
string value = a.GetString ();
if (value.Length != 0)
RootContext.StrongNameKeyFile = value;
}
break;
case "AssemblyKeyName":
case "AssemblyKeyNameAttribute":
case "System.Reflection.AssemblyKeyNameAttribute":
if (RootContext.StrongNameKeyContainer != null) {
Report.SymbolRelatedToPreviousError (a.Location, a.Name);
Report.Warning (1616, 1, "Option `{0}' overrides attribute `{1}' given in a source file or added module",
"keycontainer", "System.Reflection.AssemblyKeyNameAttribute");
}
else {
string value = a.GetString ();
if (value.Length != 0)
RootContext.StrongNameKeyContainer = value;
}
break;
case "AssemblyDelaySign":
case "AssemblyDelaySignAttribute":
case "System.Reflection.AssemblyDelaySignAttribute":
RootContext.StrongNameDelaySign = a.GetBoolean ();
break;
}
}
}
AssemblyName an = new AssemblyName ();
an.Name = Path.GetFileNameWithoutExtension (name);
// note: delay doesn't apply when using a key container
if (RootContext.StrongNameKeyContainer != null) {
an.KeyPair = new StrongNameKeyPair (RootContext.StrongNameKeyContainer);
return an;
}
// strongname is optional
if (RootContext.StrongNameKeyFile == null)
return an;
string AssemblyDir = Path.GetDirectoryName (output);
// the StrongName key file may be relative to (a) the compiled
// file or (b) to the output assembly. See bugzilla #55320
// http://bugzilla.ximian.com/show_bug.cgi?id=55320
// (a) relative to the compiled file
string filename = Path.GetFullPath (RootContext.StrongNameKeyFile);
bool exist = File.Exists (filename);
if ((!exist) && (AssemblyDir != null) && (AssemblyDir != String.Empty)) {
// (b) relative to the outputed assembly
filename = Path.GetFullPath (Path.Combine (AssemblyDir, RootContext.StrongNameKeyFile));
exist = File.Exists (filename);
}
if (exist) {
using (FileStream fs = new FileStream (filename, FileMode.Open, FileAccess.Read)) {
byte[] snkeypair = new byte [fs.Length];
fs.Read (snkeypair, 0, snkeypair.Length);
if (RootContext.StrongNameDelaySign) {
// delayed signing - DO NOT include private key
SetPublicKey (an, snkeypair);
}
else {
// no delay so we make sure we have the private key
try {
CryptoConvert.FromCapiPrivateKeyBlob (snkeypair);
an.KeyPair = new StrongNameKeyPair (snkeypair);
}
catch (CryptographicException) {
if (snkeypair.Length == 16) {
// error # is different for ECMA key
Report.Error (1606, "Could not sign the assembly. " +
"ECMA key can only be used to delay-sign assemblies");
}
else {
Error_AssemblySigning ("The specified file `" + RootContext.StrongNameKeyFile + "' does not have a private key");
}
return null;
}
}
}
}
else {
Error_AssemblySigning ("The specified file `" + RootContext.StrongNameKeyFile + "' does not exist");
return null;
}
return an;
}
void Error_AssemblySigning (string text)
{
Report.Error (1548, "Error during assembly signing. " + text);
}
#if GMCS_SOURCE
bool CheckInternalsVisibleAttribute (Attribute a)
{
string assembly_name = a.GetString ();
if (assembly_name.Length == 0)
return false;
AssemblyName aname = null;
try {
aname = new AssemblyName (assembly_name);
} catch (FileLoadException) {
} catch (ArgumentException) {
}
// Bad assembly name format
if (aname == null)
Report.Warning (1700, 3, a.Location, "Assembly reference `" + assembly_name + "' is invalid and cannot be resolved");
// Report error if we have defined Version or Culture
else if (aname.Version != null || aname.CultureInfo != null)
throw new Exception ("Friend assembly `" + a.GetString () +
"' is invalid. InternalsVisibleTo cannot have version or culture specified.");
else if (aname.GetPublicKey () == null && Name.GetPublicKey () != null) {
Report.Error (1726, a.Location, "Friend assembly reference `" + aname.FullName + "' is invalid." +
" Strong named assemblies must specify a public key in their InternalsVisibleTo declarations");
return false;
}
return true;
}
#endif
public override void ApplyAttributeBuilder (Attribute a, CustomAttributeBuilder customBuilder)
{
if (a.Type.IsSubclassOf (TypeManager.security_attr_type) && a.CheckSecurityActionValidity (true)) {
if (declarative_security == null)
declarative_security = new ListDictionary ();
a.ExtractSecurityPermissionSet (declarative_security);
return;
}
if (a.Type == TypeManager.assembly_culture_attribute_type) {
string value = a.GetString ();
if (value == null || value.Length == 0)
return;
if (RootContext.Target == Target.Exe) {
a.Error_AttributeEmitError ("The executables cannot be satelite assemblies, remove the attribute or keep it empty");
return;
}
}
#if GMCS_SOURCE
if (a.Type == TypeManager.internals_visible_attr_type && !CheckInternalsVisibleAttribute (a))
return;
if (a.Type == TypeManager.type_forwarder_attr_type) {
Type t = a.GetArgumentType ();
if (t == null || TypeManager.HasElementType (t)) {
Report.Error (735, a.Location, "Invalid type specified as an argument for TypeForwardedTo attribute");
return;
}
if (emitted_forwarders == null) {
emitted_forwarders = new ListDictionary();
} else if (emitted_forwarders.Contains(t)) {
Report.SymbolRelatedToPreviousError(((Attribute)emitted_forwarders[t]).Location, null);
Report.Error(739, a.Location, "A duplicate type forward of type `{0}'",
TypeManager.CSharpName(t));
return;
}
emitted_forwarders.Add(t, a);
if (TypeManager.LookupDeclSpace (t) != null) {
Report.SymbolRelatedToPreviousError (t);
Report.Error (729, a.Location, "Cannot forward type `{0}' because it is defined in this assembly",
TypeManager.CSharpName (t));
return;
}
if (t.IsNested) {
Report.Error (730, a.Location, "Cannot forward type `{0}' because it is a nested type",
TypeManager.CSharpName (t));
return;
}
if (t.IsGenericType) {
Report.Error (733, a.Location, "Cannot forward generic type `{0}'", TypeManager.CSharpName (t));
return;
}
if (add_type_forwarder == null) {
add_type_forwarder = typeof (AssemblyBuilder).GetMethod ("AddTypeForwarder",
BindingFlags.NonPublic | BindingFlags.Instance);
if (add_type_forwarder == null) {
Report.RuntimeMissingSupport (a.Location, "TypeForwardedTo attribute");
return;
}
}
add_type_forwarder.Invoke (Builder, new object[] { t });
return;
}
if (a.Type == TypeManager.extension_attribute_type) {
a.Error_MisusedExtensionAttribute ();
return;
}
#endif
Builder.SetCustomAttribute (customBuilder);
}
public override void Emit (TypeContainer tc)
{
base.Emit (tc);
#if GMCS_SOURCE
if (has_extension_method)
Builder.SetCustomAttribute (TypeManager.extension_attribute_attr);
// FIXME: Does this belong inside SRE.AssemblyBuilder instead?
if (OptAttributes == null || !OptAttributes.Contains (TypeManager.runtime_compatibility_attr_type)) {
ConstructorInfo ci = TypeManager.GetConstructor (
TypeManager.runtime_compatibility_attr_type, Type.EmptyTypes);
PropertyInfo [] pis = new PropertyInfo [1];
pis [0] = TypeManager.GetProperty (
TypeManager.runtime_compatibility_attr_type, "WrapNonExceptionThrows");
object [] pargs = new object [1];
pargs [0] = true;
Builder.SetCustomAttribute (new CustomAttributeBuilder (ci, new object [0], pis, pargs));
}
#endif
if (declarative_security != null) {
MethodInfo add_permission = typeof (AssemblyBuilder).GetMethod ("AddPermissionRequests", BindingFlags.Instance | BindingFlags.NonPublic);
object builder_instance = Builder;
try {
// Microsoft runtime hacking
if (add_permission == null) {
Type assembly_builder = typeof (AssemblyBuilder).Assembly.GetType ("System.Reflection.Emit.AssemblyBuilderData");
add_permission = assembly_builder.GetMethod ("AddPermissionRequests", BindingFlags.Instance | BindingFlags.NonPublic);
FieldInfo fi = typeof (AssemblyBuilder).GetField ("m_assemblyData", BindingFlags.Instance | BindingFlags.NonPublic | BindingFlags.GetField);
builder_instance = fi.GetValue (Builder);
}
object[] args = new object [] { declarative_security [SecurityAction.RequestMinimum],
declarative_security [SecurityAction.RequestOptional],
declarative_security [SecurityAction.RequestRefuse] };
add_permission.Invoke (builder_instance, args);
}
catch {
Report.RuntimeMissingSupport (Location.Null, "assembly permission setting");
}
}
}
public override string[] ValidAttributeTargets {
get {
return attribute_targets;
}
}
// Wrapper for AssemblyBuilder.AddModule
static MethodInfo adder_method;
static public MethodInfo AddModule_Method {
get {
if (adder_method == null)
adder_method = typeof (AssemblyBuilder).GetMethod ("AddModule", BindingFlags.Instance|BindingFlags.NonPublic);
return adder_method;
}
}
public Module AddModule (string module)
{
MethodInfo m = AddModule_Method;
if (m == null) {
Report.RuntimeMissingSupport (Location.Null, "/addmodule");
Environment.Exit (1);
}
try {
return (Module) m.Invoke (Builder, new object [] { module });
} catch (TargetInvocationException ex) {
throw ex.InnerException;
}
}
}
public class ModuleClass : CommonAssemblyModulClass {
// TODO: make it private and move all builder based methods here
public ModuleBuilder Builder;
bool m_module_is_unsafe;
bool has_default_charset;
public CharSet DefaultCharSet = CharSet.Ansi;
public TypeAttributes DefaultCharSetType = TypeAttributes.AnsiClass;
static string[] attribute_targets = new string [] { "module" };
public ModuleClass (bool is_unsafe)
{
m_module_is_unsafe = is_unsafe;
}
public override AttributeTargets AttributeTargets {
get {
return AttributeTargets.Module;
}
}
public override bool IsClsComplianceRequired ()
{
return CodeGen.Assembly.IsClsCompliant;
}
public override void Emit (TypeContainer tc)
{
base.Emit (tc);
if (!m_module_is_unsafe)
return;
if (TypeManager.unverifiable_code_ctor == null) {
Console.WriteLine ("Internal error ! Cannot set unverifiable code attribute.");
return;
}
Builder.SetCustomAttribute (new CustomAttributeBuilder (TypeManager.unverifiable_code_ctor, new object [0]));
}
public override void ApplyAttributeBuilder (Attribute a, CustomAttributeBuilder customBuilder)
{
if (a.Type == TypeManager.cls_compliant_attribute_type) {
if (CodeGen.Assembly.ClsCompliantAttribute == null) {
Report.Warning (3012, 1, a.Location, "You must specify the CLSCompliant attribute on the assembly, not the module, to enable CLS compliance checking");
}
else if (CodeGen.Assembly.IsClsCompliant != a.GetBoolean ()) {
Report.SymbolRelatedToPreviousError (CodeGen.Assembly.ClsCompliantAttribute.Location, CodeGen.Assembly.ClsCompliantAttribute.GetSignatureForError ());
Report.Error (3017, a.Location, "You cannot specify the CLSCompliant attribute on a module that differs from the CLSCompliant attribute on the assembly");
return;
}
}
Builder.SetCustomAttribute (customBuilder);
}
public bool HasDefaultCharSet {
get {
return has_default_charset;
}
}
///
/// It is called very early therefore can resolve only predefined attributes
///
public void Resolve ()
{
#if GMCS_SOURCE
if (OptAttributes == null)
return;
if (!OptAttributes.CheckTargets())
return;
Attribute a = ResolveAttribute (TypeManager.default_charset_type);
if (a != null) {
has_default_charset = true;
DefaultCharSet = a.GetCharSetValue ();
switch (DefaultCharSet) {
case CharSet.Ansi:
case CharSet.None:
break;
case CharSet.Auto:
DefaultCharSetType = TypeAttributes.AutoClass;
break;
case CharSet.Unicode:
DefaultCharSetType = TypeAttributes.UnicodeClass;
break;
default:
Report.Error (1724, a.Location, "Value specified for the argument to 'System.Runtime.InteropServices.DefaultCharSetAttribute' is not valid");
break;
}
}
#endif
}
public override string[] ValidAttributeTargets {
get {
return attribute_targets;
}
}
}
}