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|
//
// codegen.cs: The code generator
//
// Author:
// Miguel de Icaza (miguel@ximian.com)
//
// (C) 2001, 2002, 2003 Ximian, Inc.
// (C) 2004 Novell, Inc.
//
//#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 {
/// <summary>
/// Code generator class.
/// </summary>
public class CodeGen {
static AppDomain current_domain;
static public SymbolWriter SymbolWriter;
public static AssemblyClass Assembly;
public static ModuleClass Module;
static CodeGen ()
{
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 string TrimExt (string name)
{
int pos = name.LastIndexOf ('.');
return name.Substring (0, pos);
}
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, "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 void Init (string name, string output, bool want_debugging_support)
{
FileName = output;
AssemblyName an = Assembly.GetAssemblyName (name, output);
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 TypeManager.GetAssemblies ()) {
AssemblyName ref_name = a.GetName ();
byte [] b = ref_name.GetPublicKeyToken ();
if (b == null || b.Length == 0) {
Report.Warning (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);
}
throw;
}
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);
}
throw;
}
//
// 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);
}
static public void Save (string name)
{
try {
Assembly.Builder.Save (Basename (name));
}
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);
}
if (SymbolWriter != null)
SymbolWriter.WriteSymbolFile ();
}
public static void AddGlobalAttributes (ArrayList attrs)
{
foreach (Attribute attr in attrs) {
if (attr.IsAssemblyAttribute)
Assembly.AddAttribute (attr);
else if (attr.IsModuleAttribute)
Module.AddAttribute (attr);
}
}
}
//
// Provides "local" store across code that can yield: locals
// or fields, notice that this should not be used by anonymous
// methods to create local storage, those only require
// variable mapping.
//
public class VariableStorage {
FieldBuilder fb;
LocalBuilder local;
static int count;
public VariableStorage (EmitContext ec, Type t)
{
count++;
if (ec.InIterator)
fb = ec.CurrentIterator.MapVariable ("s_", count.ToString (), t);
else
local = ec.ig.DeclareLocal (t);
}
public void EmitThis (ILGenerator ig)
{
if (fb != null)
ig.Emit (OpCodes.Ldarg_0);
}
public void EmitStore (ILGenerator ig)
{
if (fb == null)
ig.Emit (OpCodes.Stloc, local);
else
ig.Emit (OpCodes.Stfld, fb);
}
public void EmitLoad (ILGenerator ig)
{
if (fb == null)
ig.Emit (OpCodes.Ldloc, local);
else
ig.Emit (OpCodes.Ldfld, fb);
}
public void EmitLoadAddress (ILGenerator ig)
{
if (fb == null)
ig.Emit (OpCodes.Ldloca, local);
else
ig.Emit (OpCodes.Ldflda, fb);
}
public void EmitCall (ILGenerator ig, MethodInfo mi)
{
// FIXME : we should handle a call like tostring
// here, where boxing is needed. However, we will
// never encounter that with the current usage.
bool value_type_call;
EmitThis (ig);
if (fb == null) {
value_type_call = local.LocalType.IsValueType;
if (value_type_call)
ig.Emit (OpCodes.Ldloca, local);
else
ig.Emit (OpCodes.Ldloc, local);
} else {
value_type_call = fb.FieldType.IsValueType;
if (value_type_call)
ig.Emit (OpCodes.Ldflda, fb);
else
ig.Emit (OpCodes.Ldfld, fb);
}
ig.Emit (value_type_call ? OpCodes.Call : OpCodes.Callvirt, mi);
}
}
/// <summary>
/// An Emit Context is created for each body of code (from methods,
/// properties bodies, indexer bodies or constructor bodies)
/// </summary>
public class EmitContext {
public DeclSpace DeclSpace;
public DeclSpace TypeContainer;
public ILGenerator ig;
/// <summary>
/// This variable 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.
/// </summary>
public bool CheckState;
/// <summary>
/// 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.
/// </summary>
public bool ConstantCheckState;
/// <summary>
/// Whether we are emitting code inside a static or instance method
/// </summary>
public bool IsStatic;
/// <summary>
/// Whether we are emitting a field initializer
/// </summary>
public bool IsFieldInitializer;
/// <summary>
/// The value that is allowed to be returned or NULL if there is no
/// return type.
/// </summary>
public Type ReturnType;
/// <summary>
/// Points to the Type (extracted from the TypeContainer) that
/// declares this body of code
/// </summary>
public Type ContainerType;
/// <summary>
/// Whether this is generating code for a constructor
/// </summary>
public bool IsConstructor;
/// <summary>
/// Whether we're control flow analysis enabled
/// </summary>
public bool DoFlowAnalysis;
/// <summary>
/// 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)
/// </summary>
public Hashtable temporary_storage;
public Block CurrentBlock;
public int CurrentFile;
/// <summary>
/// The location where we store the return value.
/// </summary>
LocalBuilder return_value;
/// <summary>
/// The location where return has to jump to return the
/// value
/// </summary>
public Label ReturnLabel;
/// <summary>
/// If we already defined the ReturnLabel
/// </summary>
public bool HasReturnLabel;
/// <summary>
/// Whether we are inside an iterator block.
/// </summary>
public bool InIterator;
public bool IsLastStatement;
/// <summary>
/// Whether remapping of locals, parameters and fields is turned on.
/// Used by iterators and anonymous methods.
/// </summary>
public bool RemapToProxy;
/// <summary>
/// Whether we are inside an unsafe block
/// </summary>
public bool InUnsafe;
/// <summary>
/// Whether we are in a `fixed' initialization
/// </summary>
public bool InFixedInitializer;
/// <summary>
/// Whether we are inside an anonymous method.
/// </summary>
public AnonymousMethod CurrentAnonymousMethod;
/// <summary>
/// Location for this EmitContext
/// </summary>
public Location loc;
/// <summary>
/// Used to flag that it is ok to define types recursively, as the
/// expressions are being evaluated as part of the type lookup
/// during the type resolution process
/// </summary>
public bool ResolvingTypeTree;
/// <summary>
/// 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
/// </summary>
public bool InEnumContext;
/// <summary>
/// Anonymous methods can capture local variables and fields,
/// this object tracks it. It is copied from the TopLevelBlock
/// field.
/// </summary>
public CaptureContext capture_context;
/// <summary>
/// Trace when method is called and is obsolete then this member suppress message
/// when call is inside next [Obsolete] method or type.
/// </summary>
public bool TestObsoleteMethodUsage = true;
/// <summary>
/// The current iterator
/// </summary>
public Iterator CurrentIterator;
/// <summary>
/// Whether we are in the resolving stage or not
/// </summary>
enum Phase {
Created,
Resolving,
Emitting
}
Phase current_phase;
FlowBranching current_flow_branching;
public EmitContext (DeclSpace parent, DeclSpace ds, Location l, ILGenerator ig,
Type return_type, int code_flags, bool is_constructor)
{
this.ig = ig;
TypeContainer = parent;
DeclSpace = ds;
CheckState = RootContext.Checked;
ConstantCheckState = true;
if ((return_type is TypeBuilder) && return_type.IsGenericTypeDefinition)
throw new Exception ("FUCK");
IsStatic = (code_flags & Modifiers.STATIC) != 0;
InIterator = (code_flags & Modifiers.METHOD_YIELDS) != 0;
RemapToProxy = InIterator;
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 (parent.UnsafeContext)
InUnsafe = true;
else
InUnsafe = (code_flags & Modifiers.UNSAFE) != 0;
}
loc = l;
if (ReturnType == TypeManager.void_type)
ReturnType = null;
}
public EmitContext (TypeContainer tc, Location l, ILGenerator ig,
Type return_type, int code_flags, bool is_constructor)
: this (tc, tc, l, ig, return_type, code_flags, is_constructor)
{
}
public EmitContext (TypeContainer tc, Location l, ILGenerator ig,
Type return_type, int code_flags)
: this (tc, tc, l, ig, return_type, code_flags, false)
{
}
public FlowBranching CurrentBranching {
get {
return current_flow_branching;
}
}
public bool HaveCaptureInfo {
get {
return capture_context != null;
}
}
// <summary>
// Starts a new code branching. This inherits the state of all local
// variables and parameters from the current branching.
// </summary>
public FlowBranching StartFlowBranching (FlowBranching.BranchingType type, Location loc)
{
current_flow_branching = FlowBranching.CreateBranching (CurrentBranching, type, null, loc);
return current_flow_branching;
}
// <summary>
// Starts a new code branching for block `block'.
// </summary>
public FlowBranching StartFlowBranching (Block block)
{
FlowBranching.BranchingType type;
if (CurrentBranching.Type == FlowBranching.BranchingType.Switch)
type = FlowBranching.BranchingType.SwitchSection;
else
type = FlowBranching.BranchingType.Block;
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;
}
// <summary>
// Ends a code branching. Merges the state of locals and parameters
// from all the children of the ending branching.
// </summary>
public FlowBranching.UsageVector DoEndFlowBranching ()
{
FlowBranching old = current_flow_branching;
current_flow_branching = current_flow_branching.Parent;
return current_flow_branching.MergeChild (old);
}
// <summary>
// Ends a code branching. Merges the state of locals and parameters
// from all the children of the ending branching.
// </summary>
public FlowBranching.Reachability EndFlowBranching ()
{
FlowBranching.UsageVector vector = DoEndFlowBranching ();
return vector.Reachability;
}
// <summary>
// Kills the current code branching. This throws away any changed state
// information and should only be used in case of an error.
// </summary>
public void KillFlowBranching ()
{
current_flow_branching = current_flow_branching.Parent;
}
public void CaptureVariable (LocalInfo li)
{
capture_context.AddLocal (CurrentAnonymousMethod, li);
li.IsCaptured = true;
}
public void CaptureParameter (string name, Type t, int idx)
{
capture_context.AddParameter (this, CurrentAnonymousMethod, name, t, idx);
}
//
// Use to register a field as captured
//
public void CaptureField (FieldExpr fe)
{
capture_context.AddField (fe);
}
//
// Whether anonymous methods have captured variables
//
public bool HaveCapturedVariables ()
{
if (capture_context != null)
return capture_context.HaveCapturedVariables;
return false;
}
//
// Whether anonymous methods have captured fields or this.
//
public bool HaveCapturedFields ()
{
if (capture_context != null)
return capture_context.HaveCapturedFields;
return false;
}
//
// Emits the instance pointer for the host method
//
public void EmitMethodHostInstance (EmitContext target, AnonymousMethod am)
{
if (capture_context != null)
capture_context.EmitMethodHostInstance (target, am);
else if (IsStatic)
target.ig.Emit (OpCodes.Ldnull);
else
target.ig.Emit (OpCodes.Ldarg_0);
}
//
// Returns whether the `local' variable has been captured by an anonymous
// method
//
public bool IsCaptured (LocalInfo local)
{
return capture_context.IsCaptured (local);
}
public bool IsParameterCaptured (string name)
{
if (capture_context != null)
return capture_context.IsParameterCaptured (name);
return false;
}
public void EmitMeta (ToplevelBlock b, InternalParameters ip)
{
if (capture_context != null)
capture_context.EmitHelperClasses (this);
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 (ToplevelBlock block, InternalParameters ip, Location loc)
{
if (block == null)
return;
bool unreachable;
if (ResolveTopBlock (null, block, ip, loc, out unreachable)){
EmitMeta (block, ip);
current_phase = Phase.Emitting;
EmitResolvedTopBlock (block, unreachable);
}
}
public bool ResolveTopBlock (EmitContext anonymous_method_host, ToplevelBlock block,
InternalParameters ip, Location loc, out bool unreachable)
{
current_phase = Phase.Resolving;
unreachable = false;
capture_context = block.CaptureContext;
if (!Location.IsNull (loc))
CurrentFile = loc.File;
#if PRODUCTION
try {
#endif
int errors = Report.Errors;
block.ResolveMeta (block, this, ip);
if (Report.Errors == errors){
bool old_do_flow_analysis = DoFlowAnalysis;
DoFlowAnalysis = true;
if (anonymous_method_host != null)
current_flow_branching = FlowBranching.CreateBranching (
anonymous_method_host.CurrentBranching, FlowBranching.BranchingType.Block,
block, loc);
else
current_flow_branching = FlowBranching.CreateBranching (
null, FlowBranching.BranchingType.Block, block, loc);
if (!block.Resolve (this)) {
current_flow_branching = null;
DoFlowAnalysis = old_do_flow_analysis;
return false;
}
FlowBranching.Reachability reachability = current_flow_branching.MergeTopBlock ();
current_flow_branching = null;
DoFlowAnalysis = old_do_flow_analysis;
if (reachability.AlwaysReturns ||
reachability.AlwaysThrows ||
reachability.IsUnreachable)
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 (ReturnType != null && !unreachable){
if (!InIterator){
if (CurrentAnonymousMethod != null){
Report.Error (1643, loc, "Not all code paths return a value in anonymous method of type `{0}'",
CurrentAnonymousMethod.Type);
} else {
Report.Error (161, loc, "Not all code paths return a value");
}
return false;
}
}
block.CompleteContexts ();
return true;
}
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.
//
if ((block != null) && block.IsDestructor) {
// Nothing to do; S.R.E automatically emits a leave.
} else if (HasReturnLabel || (!unreachable && !InIterator)) {
if (ReturnType != null)
ig.Emit (OpCodes.Ldloc, TemporaryReturn ());
ig.Emit (OpCodes.Ret);
}
}
//
// Close pending helper classes if we are the toplevel
//
if (capture_context != null && capture_context.ParentToplevel == null)
capture_context.CloseHelperClasses ();
}
/// <summary>
/// This is called immediately before emitting an IL opcode to tell the symbol
/// writer to which source line this opcode belongs.
/// </summary>
public void Mark (Location loc, bool check_file)
{
if ((CodeGen.SymbolWriter == null) || Location.IsNull (loc))
return;
if (check_file && (CurrentFile != loc.File))
return;
CodeGen.SymbolWriter.MarkSequencePoint (ig, loc.Row, 0);
}
public void DefineLocalVariable (string name, LocalBuilder builder)
{
if (CodeGen.SymbolWriter == null)
return;
CodeGen.SymbolWriter.DefineLocalVariable (name, builder);
}
/// <summary>
/// Returns a temporary storage for a variable of type t as
/// a local variable in the current body.
/// </summary>
public LocalBuilder GetTemporaryLocal (Type t)
{
LocalBuilder location = null;
if (temporary_storage != null){
object o = temporary_storage [t];
if (o != null){
if (o is ArrayList){
ArrayList al = (ArrayList) o;
for (int i = 0; i < al.Count; i++){
if (al [i] != null){
location = (LocalBuilder) al [i];
al [i] = null;
break;
}
}
} else
location = (LocalBuilder) o;
if (location != null)
return location;
}
}
return ig.DeclareLocal (t);
}
public void FreeTemporaryLocal (LocalBuilder b, Type t)
{
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 ArrayList){
ArrayList al = (ArrayList) o;
for (int i = 0; i < al.Count; i++){
if (al [i] == null){
al [i] = b;
return;
}
}
al.Add (b);
return;
}
ArrayList replacement = new ArrayList ();
replacement.Add (o);
temporary_storage.Remove (t);
temporary_storage [t] = replacement;
}
/// <summary>
/// Current loop begin and end labels.
/// </summary>
public Label LoopBegin, LoopEnd;
/// <summary>
/// Default target in a switch statement. Only valid if
/// InSwitch is true
/// </summary>
public Label DefaultTarget;
/// <summary>
/// If this is non-null, points to the current switch statement
/// </summary>
public Switch Switch;
/// <summary>
/// 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.
/// </summary>
public LocalBuilder TemporaryReturn ()
{
if (return_value == null){
return_value = ig.DeclareLocal (ReturnType);
if (!HasReturnLabel){
ReturnLabel = ig.DefineLabel ();
HasReturnLabel = true;
}
}
return return_value;
}
/// <summary>
/// This method is used during the Resolution phase to flag the
/// need to define the ReturnLabel
/// </summary>
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;
}
//
// Creates a field `name' with the type `t' on the proxy class
//
public FieldBuilder MapVariable (string name, Type t)
{
if (InIterator)
return CurrentIterator.MapVariable ("v_", name, t);
throw new Exception ("MapVariable for an unknown state");
}
public Expression RemapParameter (int idx)
{
FieldExpr fe = new FieldExprNoAddress (CurrentIterator.parameter_fields [idx].FieldBuilder, loc);
fe.InstanceExpression = new ProxyInstance ();
return fe.DoResolve (this);
}
public Expression RemapParameterLValue (int idx, Expression right_side)
{
FieldExpr fe = new FieldExprNoAddress (CurrentIterator.parameter_fields [idx].FieldBuilder, loc);
fe.InstanceExpression = new ProxyInstance ();
return fe.DoResolveLValue (this, right_side);
}
//
// Emits the proper object to address fields on a remapped
// variable/parameter to field in anonymous-method/iterator proxy classes.
//
public void EmitThis ()
{
ig.Emit (OpCodes.Ldarg_0);
if (InIterator){
if (!IsStatic){
FieldBuilder this_field = CurrentIterator.this_field.FieldBuilder;
if (TypeManager.IsValueType (this_field.FieldType))
ig.Emit (OpCodes.Ldflda, this_field);
else
ig.Emit (OpCodes.Ldfld, this_field);
}
} else if (capture_context != null && CurrentAnonymousMethod != null){
ScopeInfo si = CurrentAnonymousMethod.Scope;
while (si != null){
if (si.ParentLink != null)
ig.Emit (OpCodes.Ldfld, si.ParentLink);
if (si.THIS != null){
ig.Emit (OpCodes.Ldfld, si.THIS);
break;
}
si = si.ParentScope;
}
}
}
//
// Emits the code necessary to load the instance required
// to access the captured LocalInfo
//
public void EmitCapturedVariableInstance (LocalInfo li)
{
if (RemapToProxy){
ig.Emit (OpCodes.Ldarg_0);
return;
}
if (capture_context == null)
throw new Exception ("Calling EmitCapturedContext when there is no capture_context");
capture_context.EmitCapturedVariableInstance (this, li, CurrentAnonymousMethod);
}
public void EmitParameter (string name)
{
capture_context.EmitParameter (this, name);
}
public void EmitAssignParameter (string name, Expression source, bool leave_copy, bool prepare_for_load)
{
capture_context.EmitAssignParameter (this, name, source, leave_copy, prepare_for_load);
}
public void EmitAddressOfParameter (string name)
{
capture_context.EmitAddressOfParameter (this, name);
}
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 {
protected CommonAssemblyModulClass ():
base (null)
{
}
public void AddAttribute (Attribute attr)
{
if (OptAttributes == null) {
OptAttributes = new Attributes (attr);
return;
}
OptAttributes.AddAttribute (attr);
}
public void AddAttributes (ArrayList attrs)
{
if (OptAttributes == null) {
OptAttributes = new Attributes (attrs);
return;
}
OptAttributes.AddAttributes (attrs);
}
public virtual void Emit (TypeContainer tc)
{
if (OptAttributes == null)
return;
EmitContext ec = new EmitContext (tc, Mono.CSharp.Location.Null, null, null, 0, false);
OptAttributes.Emit (ec, this);
}
protected Attribute GetClsCompliantAttribute ()
{
if (OptAttributes == null)
return null;
// Ensure that we only have GlobalAttributes, since the Search below isn't safe with other types.
if (!OptAttributes.CheckTargets (this))
return null;
EmitContext temp_ec = new EmitContext (RootContext.Tree.Types, Mono.CSharp.Location.Null, null, null, 0, false);
Attribute a = OptAttributes.Search (TypeManager.cls_compliant_attribute_type, temp_ec);
if (a != null) {
a.Resolve (temp_ec);
}
return a;
}
}
public class AssemblyClass: CommonAssemblyModulClass {
// TODO: make it private and move all builder based methods here
public AssemblyBuilder Builder;
bool is_cls_compliant;
public Attribute ClsCompliantAttribute;
ListDictionary declarative_security;
static string[] attribute_targets = new string [] { "assembly" };
public AssemblyClass (): base ()
{
is_cls_compliant = false;
}
public bool IsClsCompliant {
get {
return is_cls_compliant;
}
}
public override AttributeTargets AttributeTargets {
get {
return AttributeTargets.Assembly;
}
}
public override bool IsClsCompliaceRequired(DeclSpace ds)
{
return is_cls_compliant;
}
public void ResolveClsCompliance ()
{
ClsCompliantAttribute = GetClsCompliantAttribute ();
if (ClsCompliantAttribute == null)
return;
is_cls_compliant = ClsCompliantAttribute.GetClsCompliantAttributeValue (null);
}
// 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) {
Report.Error (1548, "Could not strongname the assembly. File `" +
RootContext.StrongNameKeyFile + "' 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 it is wrong.
// However, this is invoked by CodeGen.Init, at which time none of the namespaces
// are loaded yet.
switch (a.Name) {
case "AssemblyKeyFile":
case "AssemblyKeyFileAttribute":
case "System.Reflection.AssemblyKeyFileAttribute":
if (RootContext.StrongNameKeyFile != null) {
Report.SymbolRelatedToPreviousError (a.Location, a.Name);
Report.Warning (1616, "Compiler option '{0}' overrides '{1}' given in source", "keyfile", "System.Reflection.AssemblyKeyFileAttribute");
}
else {
string value = a.GetString ();
if (value != String.Empty)
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, "keycontainer", "Compiler option '{0}' overrides '{1}' given in source", "System.Reflection.AssemblyKeyNameAttribute");
}
else {
string value = a.GetString ();
if (value != String.Empty)
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 strongname the assembly. " +
"ECMA key can only be used to delay-sign assemblies");
}
else {
Report.Error (1548, "Could not strongname the assembly. File `" +
RootContext.StrongNameKeyFile +
"' doesn't have a private key.");
}
Environment.Exit (1);
}
}
}
}
else {
Report.Error (1548, "Could not strongname the assembly. File `" +
RootContext.StrongNameKeyFile + "' not found.");
Environment.Exit (1);
}
return an;
}
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;
}
Builder.SetCustomAttribute (customBuilder);
}
public override void Emit (TypeContainer tc)
{
base.Emit (tc);
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;
}
}
}
public class ModuleClass: CommonAssemblyModulClass {
// TODO: make it private and move all builder based methods here
public ModuleBuilder Builder;
bool m_module_is_unsafe;
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 IsClsCompliaceRequired(DeclSpace ds)
{
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, 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.Name);
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 override string[] ValidAttributeTargets {
get {
return attribute_targets;
}
}
}
}
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