/// <summary>
/// Creates an encoder backed by code and control-flow builders.
/// </summary>
/// <param name="codeBuilder">Builder to write encoded instructions to.</param>
/// <param name="controlFlowBuilder">
/// Builder tracking labels, branches and exception handlers.
/// Must be specified to be able to use some of the control-flow factory methods of <see cref="InstructionEncoder"/>,
/// such as <see cref="Branch(ILOpCode, LabelHandle)"/>, <see cref="DefineLabel"/>, <see cref="MarkLabel(LabelHandle)"/> etc.
/// </param>
public InstructionEncoder(BlobBuilder codeBuilder, ControlFlowBuilder controlFlowBuilder = null)
{
if (codeBuilder == null)
{
Throw.BuilderArgumentNull();
}
CodeBuilder = codeBuilder;
ControlFlowBuilder = controlFlowBuilder;
}
/// <summary>
/// Creates an encoder backed by code and control-flow builders.
/// </summary>
/// <param name="codeBuilder">Builder to write encoded instructions to.</param>
/// <param name="controlFlowBuilder">
/// Builder tracking labels, branches and exception handlers.
/// Must be specified to be able to use some of the control-flow factory methods of <see cref="InstructionEncoder"/>,
/// such as <see cref="Branch(ILOpCode, LabelHandle)"/>, <see cref="DefineLabel"/>, <see cref="MarkLabel(LabelHandle)"/> etc.
/// </param>
public InstructionEncoder(BlobBuilder codeBuilder, ControlFlowBuilder controlFlowBuilder = null)
{
if (codeBuilder == null)
{
Throw.BuilderArgumentNull();
}
CodeBuilder = codeBuilder;
ControlFlowBuilder = controlFlowBuilder;
}
private static MethodDefinitionHandle BasicValidationEmit(MetadataBuilder metadata, BlobBuilder ilBuilder)
{
metadata.AddModule(
0,
metadata.GetOrAddString("ConsoleApplication.exe"),
metadata.GetOrAddGuid(s_guid),
default(GuidHandle),
default(GuidHandle));
metadata.AddAssembly(
metadata.GetOrAddString("ConsoleApplication"),
version: new Version(1, 0, 0, 0),
culture: default(StringHandle),
publicKey: metadata.GetOrAddBlob(ImmutableArray.Create(Misc.KeyPair_PublicKey)),
flags: AssemblyFlags.PublicKey,
hashAlgorithm: AssemblyHashAlgorithm.Sha1);
var mscorlibAssemblyRef = metadata.AddAssemblyReference(
name: metadata.GetOrAddString("mscorlib"),
version: new Version(4, 0, 0, 0),
culture: default(StringHandle),
publicKeyOrToken: metadata.GetOrAddBlob(ImmutableArray.Create<byte>(0xB7, 0x7A, 0x5C, 0x56, 0x19, 0x34, 0xE0, 0x89)),
flags: default(AssemblyFlags),
hashValue: default(BlobHandle));
var systemObjectTypeRef = metadata.AddTypeReference(
mscorlibAssemblyRef,
metadata.GetOrAddString("System"),
metadata.GetOrAddString("Object"));
var systemConsoleTypeRefHandle = metadata.AddTypeReference(
mscorlibAssemblyRef,
metadata.GetOrAddString("System"),
metadata.GetOrAddString("Console"));
var consoleWriteLineSignature = new BlobBuilder();
new BlobEncoder(consoleWriteLineSignature).
MethodSignature().
Parameters(1,
returnType => returnType.Void(),
parameters => parameters.AddParameter().Type().String());
var consoleWriteLineMemberRef = metadata.AddMemberReference(
systemConsoleTypeRefHandle,
metadata.GetOrAddString("WriteLine"),
metadata.GetOrAddBlob(consoleWriteLineSignature));
var parameterlessCtorSignature = new BlobBuilder();
new BlobEncoder(parameterlessCtorSignature).
MethodSignature(isInstanceMethod: true).
Parameters(0, returnType => returnType.Void(), parameters => { });
var parameterlessCtorBlobIndex = metadata.GetOrAddBlob(parameterlessCtorSignature);
var objectCtorMemberRef = metadata.AddMemberReference(
systemObjectTypeRef,
metadata.GetOrAddString(".ctor"),
parameterlessCtorBlobIndex);
var mainSignature = new BlobBuilder();
new BlobEncoder(mainSignature).
MethodSignature().
Parameters(0, returnType => returnType.Void(), parameters => { });
var methodBodyStream = new MethodBodyStreamEncoder(ilBuilder);
var codeBuilder = new BlobBuilder();
InstructionEncoder il;
//
// Program::.ctor
//
il = new InstructionEncoder(codeBuilder);
// ldarg.0
il.LoadArgument(0);
// call instance void [mscorlib]System.Object::.ctor()
il.Call(objectCtorMemberRef);
// ret
il.OpCode(ILOpCode.Ret);
int ctorBodyOffset = methodBodyStream.AddMethodBody(il);
codeBuilder.Clear();
//
// Program::Main
//
var flowBuilder = new ControlFlowBuilder();
il = new InstructionEncoder(codeBuilder, flowBuilder);
var tryStart = il.DefineLabel();
var tryEnd = il.DefineLabel();
var finallyStart = il.DefineLabel();
var finallyEnd = il.DefineLabel();
flowBuilder.AddFinallyRegion(tryStart, tryEnd, finallyStart, finallyEnd);
// .try
il.MarkLabel(tryStart);
// ldstr "hello"
il.LoadString(metadata.GetOrAddUserString("hello"));
// call void [mscorlib]System.Console::WriteLine(string)
il.Call(consoleWriteLineMemberRef);
// leave.s END
il.Branch(ILOpCode.Leave_s, finallyEnd);
il.MarkLabel(tryEnd);
// .finally
il.MarkLabel(finallyStart);
// ldstr "world"
il.LoadString(metadata.GetOrAddUserString("world"));
// call void [mscorlib]System.Console::WriteLine(string)
il.Call(consoleWriteLineMemberRef);
// .endfinally
il.OpCode(ILOpCode.Endfinally);
il.MarkLabel(finallyEnd);
// ret
il.OpCode(ILOpCode.Ret);
int mainBodyOffset = methodBodyStream.AddMethodBody(il);
codeBuilder.Clear();
flowBuilder.Clear();
var mainMethodDef = metadata.AddMethodDefinition(
MethodAttributes.Public | MethodAttributes.Static | MethodAttributes.HideBySig,
MethodImplAttributes.IL | MethodImplAttributes.Managed,
metadata.GetOrAddString("Main"),
metadata.GetOrAddBlob(mainSignature),
mainBodyOffset,
parameterList: default(ParameterHandle));
var ctorDef = metadata.AddMethodDefinition(
MethodAttributes.Public | MethodAttributes.HideBySig | MethodAttributes.SpecialName | MethodAttributes.RTSpecialName,
MethodImplAttributes.IL | MethodImplAttributes.Managed,
metadata.GetOrAddString(".ctor"),
parameterlessCtorBlobIndex,
ctorBodyOffset,
parameterList: default(ParameterHandle));
metadata.AddTypeDefinition(
default(TypeAttributes),
default(StringHandle),
metadata.GetOrAddString("<Module>"),
baseType: default(EntityHandle),
fieldList: MetadataTokens.FieldDefinitionHandle(1),
methodList: mainMethodDef);
metadata.AddTypeDefinition(
TypeAttributes.Class | TypeAttributes.Public | TypeAttributes.AutoLayout | TypeAttributes.BeforeFieldInit,
metadata.GetOrAddString("ConsoleApplication"),
metadata.GetOrAddString("Program"),
systemObjectTypeRef,
fieldList: MetadataTokens.FieldDefinitionHandle(1),
methodList: mainMethodDef);
return mainMethodDef;
}