//
// 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 {
///
/// 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, "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 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);
}
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;
}
//
// 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));
}
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);
}
if (SymbolWriter != null)
SymbolWriter.WriteSymbolFile ();
}
}
///
/// An Emit Context is created for each body of code (from methods,
/// properties bodies, indexer bodies or constructor bodies)
///
public class EmitContext {
public readonly DeclSpace DeclSpace;
public DeclSpace TypeContainer;
public ILGenerator ig;
///
/// 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.
///
public bool CheckState;
///
/// 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.
///
public bool ConstantCheckState;
///
/// 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;
///
/// The value that is allowed to be returned or NULL if there is no
/// return type.
///
public Type ReturnType;
///
/// 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;
///
/// Whether we're control flow analysis enabled
///
public bool DoFlowAnalysis;
///
/// Whether we're control flow analysis disabled on struct
///
public bool OmitStructFlowAnalysis;
///
/// 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;
public bool IsLastStatement;
///
/// Whether we are inside an unsafe block
///
public bool InUnsafe;
///
/// Whether we are in a `fixed' initialization
///
public bool InFixedInitializer;
public bool InRefOutArgumentResolving;
public bool InCatch;
public bool InFinally;
///
/// 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;
///
/// Anonymous methods can capture local variables and fields,
/// this object tracks it. It is copied from the TopLevelBlock
/// field.
///
public CaptureContext capture_context;
///
/// Trace when method is called and is obsolete then this member suppress message
/// when call is inside next [Obsolete] method or type.
///
public bool TestObsoleteMethodUsage = true;
///
/// The current iterator
///
public Iterator CurrentIterator;
///
/// Whether we are in the resolving stage or not
///
enum Phase {
Created,
Resolving,
Emitting
}
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}:{2})", id,
CurrentIterator, capture_context, loc);
}
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;
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 (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;
}
}
//
// 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;
DoFlowAnalysis = true;
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;
}
//
// 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 FlowBranching.Reachability EndFlowBranching ()
{
FlowBranching.UsageVector vector = DoEndFlowBranching ();
return vector.Reachability;
}
//
// 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 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);
}
public void CaptureThis ()
{
capture_context.CaptureThis ();
}
//
// Use to register a field as captured
//
public void CaptureField (FieldExpr fe)
{
capture_context.AddField (this, CurrentAnonymousMethod, 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.EmitAnonymousHelperClasses (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 (IMethodData md, ToplevelBlock block, InternalParameters ip)
{
if (block == null)
return;
bool unreachable;
if (ResolveTopBlock (null, block, ip, md, out unreachable)){
EmitMeta (block, ip);
current_phase = Phase.Emitting;
EmitResolvedTopBlock (block, unreachable);
}
}
bool resolved;
public bool ResolveTopBlock (EmitContext anonymous_method_host, ToplevelBlock block,
InternalParameters ip, IMethodData md, out bool unreachable)
{
current_phase = Phase.Resolving;
unreachable = false;
if (resolved)
return true;
capture_context = block.CaptureContext;
if (!loc.IsNull)
CurrentFile = loc.File;
#if PRODUCTION
try {
#endif
if (!block.ResolveMeta (this, ip))
return false;
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 = block.TopLevelBranching;
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 (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;
}
}
block.CompleteContexts ();
resolved = true;
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.
//
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 (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.CloseAnonymousHelperClasses ();
}
///
/// 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)
{
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;
}
///
/// 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 (ReturnType);
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;
}
//
// 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 (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 (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 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 ResolveAttribute (Type a_type)
{
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 (a_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;
// Module is here just because of error messages
static string[] attribute_targets = new string [] { "assembly", "module" };
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 = ResolveAttribute (TypeManager.cls_compliant_attribute_type);
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) {
Error_AssemblySigning ("The speficied 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, "Option `{0}' overrides attribute `{1}' given in a source file or added module",
"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, "Option `{0}' overrides attribute `{1}' given in a source file or added module",
"keycontainer", "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 sign the assembly. " +
"ECMA key can only be used to delay-sign assemblies");
}
else {
Error_AssemblySigning ("The speficied file `" + RootContext.StrongNameKeyFile + "' does not have a private key");
}
return null;
}
}
}
}
else {
Error_AssemblySigning ("The speficied file `" + RootContext.StrongNameKeyFile + "' does not exist");
return null;
}
return an;
}
void Error_AssemblySigning (string text)
{
Report.Error (1548, "Error during assembly signing. " + text);
}
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;
}
}
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;
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 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.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);
}
///
/// It is called very early therefore can resolve only predefined attributes
///
public void ResolveAttributes ()
{
#if NET_2_0
Attribute a = ResolveAttribute (TypeManager.default_charset_type);
if (a != null) {
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;
}
}
}
}