074a4ff807
Int32 parameters should be converted to native int when the native signature expects the latter.
905 lines
38 KiB
C#
905 lines
38 KiB
C#
// OpenTK.Rewrite: IL rewriter for OpenTK.dll
|
|
// Copyright (C) 2013 Stefanos Apostolopoulos
|
|
//
|
|
// This program is free software: you can redistribute it and/or modify
|
|
// it under the terms of the GNU General Public License as published by
|
|
// the Free Software Foundation, either version 3 of the License, or
|
|
// (at your option) any later version.
|
|
//
|
|
// This program is distributed in the hope that it will be useful,
|
|
// but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
// GNU General Public License for more details.
|
|
//
|
|
// You should have received a copy of the GNU General Public License
|
|
// along with this program. If not, see <http://www.gnu.org/licenses/>.
|
|
|
|
using System;
|
|
using System.Collections.Generic;
|
|
using System.IO;
|
|
using System.Linq;
|
|
using System.Text;
|
|
|
|
using Mono.Cecil;
|
|
using Mono.Cecil.Cil;
|
|
using Mono.Cecil.Rocks;
|
|
|
|
namespace OpenTK.Rewrite
|
|
{
|
|
// Replaces OpenTK.InteropHelper method instances
|
|
// with the s IL instructions.
|
|
class Program
|
|
{
|
|
static void Main(string[] args)
|
|
{
|
|
if (args.Length == 0)
|
|
{
|
|
Console.WriteLine("Usage: rewrite [file.dll] [file.snk] [options]");
|
|
Console.WriteLine("[options] is:");
|
|
Console.WriteLine(" -debug (enable calls to GL.GetError())");
|
|
return;
|
|
}
|
|
|
|
var program = new Program();
|
|
var file = args[0];
|
|
var key = args[1];
|
|
var options = args.Where(a => a.StartsWith("-") || a.StartsWith("/"));
|
|
program.Rewrite(file, key, options);
|
|
}
|
|
|
|
// mscorlib types
|
|
static AssemblyDefinition mscorlib;
|
|
static TypeDefinition TypeMarshal;
|
|
static TypeDefinition TypeStringArray;
|
|
static TypeDefinition TypeStringBuilder;
|
|
static TypeDefinition TypeVoid;
|
|
static TypeDefinition TypeIntPtr;
|
|
static TypeDefinition TypeInt32;
|
|
|
|
// OpenTK.BindingsBase
|
|
static TypeDefinition TypeBindingsBase;
|
|
|
|
void Rewrite(string file, string keyfile, IEnumerable<string> options)
|
|
{
|
|
// Specify assembly read and write parameters
|
|
// We want to keep a valid symbols file (pdb or mdb)
|
|
var read_params = new ReaderParameters();
|
|
var write_params = new WriterParameters();
|
|
var pdb = Path.ChangeExtension(file, "pdb");
|
|
var mdb = Path.ChangeExtension(file, "mdb");
|
|
ISymbolReaderProvider provider = null;
|
|
if (File.Exists(pdb))
|
|
{
|
|
provider = new Mono.Cecil.Pdb.PdbReaderProvider();
|
|
}
|
|
else if (File.Exists(mdb))
|
|
{
|
|
provider = new Mono.Cecil.Mdb.MdbReaderProvider();
|
|
}
|
|
read_params.SymbolReaderProvider = provider;
|
|
read_params.ReadSymbols = true;
|
|
write_params.WriteSymbols = true;
|
|
|
|
if (!String.IsNullOrEmpty(keyfile) && File.Exists(keyfile))
|
|
{
|
|
keyfile = Path.GetFullPath(keyfile);
|
|
var fs = new FileStream(keyfile, FileMode.Open);
|
|
var keypair = new System.Reflection.StrongNameKeyPair(fs);
|
|
fs.Close();
|
|
write_params.StrongNameKeyPair = keypair;
|
|
}
|
|
else
|
|
{
|
|
Console.Error.WriteLine("No keyfile specified or keyfile missing.");
|
|
}
|
|
|
|
// Load assembly and process all modules
|
|
var assembly = AssemblyDefinition.ReadAssembly(file, read_params);
|
|
var rewritten = assembly.CustomAttributes.FirstOrDefault(a => a.AttributeType.Name == "RewrittenAttribute");
|
|
if (rewritten == null)
|
|
{
|
|
foreach (var module in assembly.Modules)
|
|
{
|
|
foreach (var reference in module.AssemblyReferences)
|
|
{
|
|
var resolved = module.AssemblyResolver.Resolve(reference);
|
|
if (reference.Name == "mscorlib")
|
|
{
|
|
mscorlib = resolved;
|
|
}
|
|
}
|
|
}
|
|
|
|
if (mscorlib == null)
|
|
{
|
|
Console.Error.WriteLine("Failed to locate mscorlib");
|
|
return;
|
|
}
|
|
TypeMarshal = mscorlib.MainModule.GetType("System.Runtime.InteropServices.Marshal");
|
|
TypeStringArray = mscorlib.MainModule.GetType("System.String").MakeArrayType().Resolve();
|
|
TypeStringBuilder = mscorlib.MainModule.GetType("System.Text.StringBuilder");
|
|
TypeVoid = mscorlib.MainModule.GetType("System.Void");
|
|
TypeIntPtr = mscorlib.MainModule.GetType("System.IntPtr");
|
|
TypeInt32 = mscorlib.MainModule.GetType("System.Int32");
|
|
|
|
TypeBindingsBase = assembly.Modules.Select(m => m.GetType("OpenTK.BindingsBase")).First();
|
|
|
|
foreach (var module in assembly.Modules)
|
|
{
|
|
foreach (var type in module.Types)
|
|
{
|
|
Rewrite(type, options);
|
|
}
|
|
}
|
|
}
|
|
else
|
|
{
|
|
Console.Error.WriteLine("Error: assembly has already been rewritten");
|
|
}
|
|
|
|
// Save rewritten assembly
|
|
assembly.Write(file, write_params);
|
|
}
|
|
|
|
void Rewrite(TypeDefinition type, IEnumerable<string> options)
|
|
{
|
|
var entry_points = type.Fields.FirstOrDefault(f => f.Name == "EntryPoints");
|
|
if (entry_points != null)
|
|
{
|
|
// Build list of entry point signatures (one per entry point)
|
|
var entry_signatures = new List<MethodDefinition>();
|
|
entry_signatures.AddRange(type.Methods
|
|
.Where(t => t.CustomAttributes.Any(a => a.AttributeType.Name == "SlotAttribute")));
|
|
|
|
Rewrite(type, entry_points, entry_signatures, options);
|
|
|
|
RemoveNativeSignatures(type, entry_signatures);
|
|
}
|
|
|
|
if (type.Name == "RewrittenAttribute")
|
|
{
|
|
var rewritten_constructor = type.GetConstructors().First();
|
|
var rewritten = new CustomAttribute(rewritten_constructor);
|
|
rewritten.ConstructorArguments.Add(new CustomAttributeArgument(
|
|
type.Module.Import(mscorlib.MainModule.GetType("System.Boolean")), true));
|
|
type.Module.Assembly.CustomAttributes.Add(rewritten);
|
|
}
|
|
}
|
|
|
|
int GetSlot(MethodDefinition signature)
|
|
{
|
|
var slot_attribute = signature.CustomAttributes
|
|
.FirstOrDefault(a => a.AttributeType.Name == "SlotAttribute");
|
|
int slot =
|
|
slot_attribute != null ?
|
|
(int)slot_attribute.ConstructorArguments[0].Value :
|
|
-1;
|
|
|
|
return slot;
|
|
}
|
|
|
|
void Rewrite(TypeDefinition type, FieldDefinition entry_points,
|
|
List<MethodDefinition> entry_signatures, IEnumerable<string> options)
|
|
{
|
|
// Rewrite all wrapper methods
|
|
var wrapper_signatures = new List<MethodDefinition>();
|
|
wrapper_signatures.AddRange(type.Methods
|
|
.Where(m => m.IsPublic && m.CustomAttributes.Any(a => a.AttributeType.Name == "AutoGeneratedAttribute")));
|
|
|
|
foreach (var wrapper in wrapper_signatures)
|
|
{
|
|
var autogenerated = wrapper.CustomAttributes
|
|
.Where(a => a.AttributeType.Name == "AutoGeneratedAttribute");
|
|
if (autogenerated.Count() > 0)
|
|
{
|
|
var signature_name = (string)autogenerated.First()
|
|
.Fields.First(f => f.Name == "EntryPoint").Argument.Value;
|
|
var signature = entry_signatures.FirstOrDefault(s => s.Name == signature_name);
|
|
int slot = GetSlot(signature);
|
|
|
|
ProcessMethod(wrapper, signature, slot, entry_points, options);
|
|
}
|
|
}
|
|
|
|
RemoveSupportingAttributes(type);
|
|
|
|
if (type.NestedTypes.Count > 0)
|
|
{
|
|
foreach (var nested_type in type.NestedTypes)
|
|
{
|
|
Rewrite(nested_type, entry_points, entry_signatures, options);
|
|
}
|
|
}
|
|
}
|
|
|
|
void RemoveNativeSignatures(TypeDefinition type, List<MethodDefinition> methods)
|
|
{
|
|
// Remove all DllImports for functions called through calli, since
|
|
// their signatures are embedded directly into the calli callsite.
|
|
// This reduces dll size by ~400KB.
|
|
foreach (var m in methods.Where(s => GetSlot(s) != -1))
|
|
{
|
|
type.Methods.Remove(m);
|
|
}
|
|
}
|
|
|
|
void RemoveSupportingAttributes(TypeDefinition type)
|
|
{
|
|
foreach (var method in type.Methods)
|
|
{
|
|
var attr = method.CustomAttributes;
|
|
for (int i = 0; i < attr.Count; i++)
|
|
{
|
|
if (attr[i].AttributeType.Name == "AutoGeneratedAttribute")
|
|
{
|
|
attr.RemoveAt(i);
|
|
i--;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
// Create body for method
|
|
static void ProcessMethod(MethodDefinition wrapper, MethodDefinition native, int slot,
|
|
FieldDefinition entry_points, IEnumerable<string> options)
|
|
{
|
|
var body = wrapper.Body;
|
|
var il = body.GetILProcessor();
|
|
var instructions = body.Instructions;
|
|
instructions.Clear();
|
|
|
|
// Declare pinned variables for every reference and array parameter
|
|
// and push each parameter on the stack
|
|
|
|
DebugVariables vars = null;
|
|
if (options.Contains("-debug"))
|
|
{
|
|
vars = EmitDebugPrologue(wrapper, il);
|
|
}
|
|
|
|
// Patch convenience wrappers
|
|
if (wrapper.Parameters.Count == native.Parameters.Count)
|
|
{
|
|
EmitParameters(wrapper, native, body, il);
|
|
}
|
|
else
|
|
{
|
|
int difference = native.Parameters.Count - wrapper.Parameters.Count;
|
|
EmitConvenienceWrapper(wrapper, native, difference, body, il);
|
|
}
|
|
|
|
if (slot != -1)
|
|
{
|
|
// push the entry point address on the stack
|
|
EmitEntryPoint(entry_points, il, slot);
|
|
|
|
// issue calli
|
|
EmitCalli(il, native);
|
|
}
|
|
else
|
|
{
|
|
// issue DllImport call
|
|
EmitCall(il, native);
|
|
}
|
|
|
|
if (wrapper.ReturnType.Name != "Void")
|
|
{
|
|
EmitReturnTypeWrapper(wrapper, native, body, il);
|
|
}
|
|
|
|
EmitParameterEpilogues(wrapper, native, body, il);
|
|
|
|
if (options.Contains("-debug"))
|
|
{
|
|
EmitDebugEpilogue(wrapper, il, vars);
|
|
}
|
|
|
|
// return
|
|
il.Emit(OpCodes.Ret);
|
|
|
|
if (body.Variables.Count > 0)
|
|
{
|
|
// Required for verifiable executables
|
|
// (otherwise peverify complains bitterly)
|
|
body.InitLocals = true;
|
|
}
|
|
body.OptimizeMacros();
|
|
}
|
|
|
|
class DebugVariables
|
|
{
|
|
public TypeDefinition ErrorHelperType;
|
|
public VariableDefinition ErrorHelperLocal;
|
|
public MethodReference Get_CurrentContext;
|
|
public MethodReference Set_ErrorChecking;
|
|
public Instruction BeginTry;
|
|
}
|
|
|
|
static DebugVariables EmitDebugPrologue(MethodDefinition wrapper, ILProcessor il)
|
|
{
|
|
|
|
DebugVariables vars = null;
|
|
if (il.Body.Method.Name != "GetError")
|
|
{
|
|
// Pull out the namespace name, method fullname will look
|
|
// something like "type namespace.class::method(type arg)"
|
|
var module = il.Body.Method.FullName;
|
|
module = module.Substring(module.IndexOf(' ') + 1);
|
|
module = module.Substring(0, module.IndexOf("::"));
|
|
module = module.Substring(0, module.LastIndexOf('.'));
|
|
|
|
// Only works for Graphics modules due to hardcoded use of
|
|
// OpenTK.Graphics.GraphicsContext
|
|
if (module == "OpenTK.Graphics.OpenGL4" ||
|
|
module == "OpenTK.Graphics.OpenGL" ||
|
|
module == "OpenTK.Graphics.ES10" ||
|
|
module == "OpenTK.Graphics.ES11" ||
|
|
module == "OpenTK.Graphics.ES20" ||
|
|
module == "OpenTK.Graphics.ES30")
|
|
{
|
|
var errorHelperType = wrapper.Module.GetType(module, "ErrorHelper");
|
|
|
|
if (errorHelperType != null)
|
|
{
|
|
vars = new DebugVariables();
|
|
vars.ErrorHelperType = errorHelperType;
|
|
|
|
// GraphicsContext type
|
|
var graphicsContext = wrapper.Module.Types.First(
|
|
type => type.FullName == "OpenTK.Graphics.GraphicsContext");
|
|
|
|
// IGraphicsContext type
|
|
var iGraphicsContext = wrapper.Module.Types.First(
|
|
type => type.FullName == "OpenTK.Graphics.IGraphicsContext");
|
|
|
|
// Get the constructor that takes a GraphicsContext parameter
|
|
var ctor = vars.ErrorHelperType.GetConstructors().FirstOrDefault(
|
|
c => c.Parameters.Count == 1 &&
|
|
c.Parameters[0].ParameterType.FullName == iGraphicsContext.FullName);
|
|
|
|
if (ctor == null)
|
|
{
|
|
throw new InvalidOperationException(
|
|
String.Format(
|
|
"{0} does needs a constructor taking {1}",
|
|
errorHelperType,
|
|
graphicsContext));
|
|
}
|
|
|
|
// GraphicsContext.CurrentContext property getter
|
|
vars.Get_CurrentContext = graphicsContext.Methods.First(
|
|
method => method.Name == "get_CurrentContext");
|
|
|
|
vars.Set_ErrorChecking = graphicsContext.Methods.First(
|
|
method => method.Name == "set_ErrorChecking");
|
|
|
|
vars.ErrorHelperLocal = new VariableDefinition(vars.ErrorHelperType);
|
|
|
|
// using (new ErrorHelper(GraphicsContext.CurrentContext)) { ...
|
|
il.Body.Variables.Add(vars.ErrorHelperLocal);
|
|
il.Emit(OpCodes.Ldloca, vars.ErrorHelperLocal);
|
|
il.Emit(OpCodes.Call, vars.Get_CurrentContext);
|
|
il.Emit(OpCodes.Call, ctor);
|
|
|
|
vars.BeginTry = Instruction.Create(OpCodes.Nop);
|
|
il.Append(vars.BeginTry);
|
|
|
|
// Special case Begin to turn off error checking.
|
|
if (il.Body.Method.Name == "Begin")
|
|
{
|
|
il.Emit(OpCodes.Call, vars.Get_CurrentContext);
|
|
il.Emit(OpCodes.Ldc_I4_0);
|
|
il.Emit(OpCodes.Conv_I1);
|
|
il.Emit(OpCodes.Call, vars.Set_ErrorChecking);
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
return vars;
|
|
}
|
|
|
|
static void EmitDebugEpilogue(MethodDefinition wrapper, ILProcessor il, DebugVariables vars)
|
|
{
|
|
if (vars != null)
|
|
{
|
|
var disposeMethod = vars.ErrorHelperType.Methods.First(
|
|
method => method.Name == "Dispose");
|
|
|
|
// Store then reload the result from the call
|
|
var resultLocal = new VariableDefinition(wrapper.ReturnType);
|
|
if (resultLocal.VariableType.FullName != Program.TypeVoid.FullName)
|
|
{
|
|
il.Body.Variables.Add(resultLocal);
|
|
il.Emit(OpCodes.Stloc, resultLocal);
|
|
}
|
|
|
|
// Special case End to turn on error checking.
|
|
if (il.Body.Method.Name == "End")
|
|
{
|
|
il.Emit(OpCodes.Call, vars.Get_CurrentContext);
|
|
il.Emit(OpCodes.Ldc_I4_1);
|
|
il.Emit(OpCodes.Conv_I1);
|
|
il.Emit(OpCodes.Call, vars.Set_ErrorChecking);
|
|
}
|
|
|
|
// We need a NOP to set up the finally handler range correctly.
|
|
var nopInstruction = Instruction.Create(OpCodes.Nop);
|
|
var loadInstruction = Instruction.Create(OpCodes.Ldloca, vars.ErrorHelperLocal);
|
|
var disposeInstruction = Instruction.Create(OpCodes.Call, disposeMethod);
|
|
var endFinallyInstruction = Instruction.Create(OpCodes.Endfinally);
|
|
var endTryInstruction = Instruction.Create(OpCodes.Leave, nopInstruction);
|
|
|
|
il.Append(endTryInstruction);
|
|
il.Append(loadInstruction);
|
|
il.Append(disposeInstruction);
|
|
il.Append(endFinallyInstruction);
|
|
il.Append(nopInstruction);
|
|
|
|
var finallyHandler = new ExceptionHandler(ExceptionHandlerType.Finally);
|
|
finallyHandler.TryStart = vars.BeginTry;
|
|
finallyHandler.TryEnd = loadInstruction;
|
|
finallyHandler.HandlerStart = loadInstruction;
|
|
finallyHandler.HandlerEnd = nopInstruction;
|
|
|
|
il.Body.ExceptionHandlers.Add(finallyHandler);
|
|
|
|
if (resultLocal.VariableType.FullName != Program.TypeVoid.FullName)
|
|
{
|
|
il.Emit(OpCodes.Ldloc, resultLocal);
|
|
}
|
|
}
|
|
}
|
|
|
|
private static void EmitReturnTypeWrapper(MethodDefinition wrapper, MethodDefinition native, MethodBody body, ILProcessor il)
|
|
{
|
|
if (wrapper.Parameters.Count < native.Parameters.Count)
|
|
{
|
|
// Convenience wrapper. The result is stored in the last local variable
|
|
il.Emit(OpCodes.Ldloc, body.Variables.Count - 1);
|
|
}
|
|
else if (wrapper.ReturnType != native.ReturnType)
|
|
{
|
|
if (wrapper.ReturnType.Name == "String")
|
|
{
|
|
// String return-type wrapper
|
|
// return new string((sbyte*)((void*)GetString()));
|
|
|
|
var intptr_to_voidpointer = wrapper.Module.Import(mscorlib.MainModule.GetType("System.IntPtr").GetMethods()
|
|
.First(m =>
|
|
{
|
|
return
|
|
m.Name == "op_Explicit" &&
|
|
m.ReturnType.Name == "Void*";
|
|
}));
|
|
|
|
var string_constructor = wrapper.Module.Import(mscorlib.MainModule.GetType("System.String").GetConstructors()
|
|
.First(m =>
|
|
{
|
|
var p = m.Parameters;
|
|
return p.Count > 0 && p[0].ParameterType.Name == "SByte*";
|
|
}));
|
|
|
|
il.Emit(OpCodes.Call, intptr_to_voidpointer);
|
|
il.Emit(OpCodes.Newobj, string_constructor);
|
|
}
|
|
else if (wrapper.ReturnType.Resolve().IsEnum)
|
|
{
|
|
// Nothing to do
|
|
}
|
|
else if (wrapper.ReturnType.Name == "Boolean" && native.ReturnType.Name == "Byte")
|
|
{
|
|
// Nothing to do
|
|
// It appears that a byte with 1 = true (GL_TRUE) and 0 = false (GL_FALSE)
|
|
// can be reinterpreted as a bool without a problem.
|
|
// Todo: maybe we should return (value == 0 ? false : true) just to be
|
|
// on the safe side?
|
|
}
|
|
else
|
|
{
|
|
Console.Error.WriteLine("Return wrapper for '{1}' not implemented yet ({0})", native.Name, wrapper.ReturnType.Name);
|
|
}
|
|
}
|
|
else
|
|
{
|
|
// nothing to do, the native call leaves the return value
|
|
// on the stack and we return that unmodified to the caller.
|
|
}
|
|
}
|
|
|
|
static void EmitParameterEpilogues(MethodDefinition wrapper, MethodDefinition native, MethodBody body, ILProcessor il)
|
|
{
|
|
foreach (var p in wrapper.Parameters)
|
|
{
|
|
if (p.ParameterType.Name == "StringBuilder")
|
|
{
|
|
EmitStringBuilderEpilogue(wrapper, native, p, body, il);
|
|
}
|
|
|
|
if (!p.ParameterType.IsArray && p.ParameterType.Name == "String")
|
|
{
|
|
EmitStringEpilogue(wrapper, p, body, il);
|
|
}
|
|
|
|
if (p.ParameterType.IsArray && p.ParameterType.GetElementType().Name == "String")
|
|
{
|
|
EmitStringArrayEpilogue(wrapper, p, body, il);
|
|
}
|
|
}
|
|
}
|
|
|
|
static void EmitStringBuilderParameter(MethodDefinition method, ParameterDefinition parameter, MethodBody body, ILProcessor il)
|
|
{
|
|
var p = parameter.ParameterType;
|
|
|
|
// void GetShaderInfoLog(..., StringBuilder foo)
|
|
// IntPtr foo_sb_ptr;
|
|
// try {
|
|
// foo_sb_ptr = Marshal.AllocHGlobal(sb.Capacity + 1);
|
|
// glGetShaderInfoLog(..., foo_sb_ptr);
|
|
// MarshalPtrToStringBuilder(foo_sb_ptr, sb);
|
|
// }
|
|
// finally {
|
|
// Marshal.FreeHGlobal(sb_ptr);
|
|
// }
|
|
// Make sure we have imported StringBuilder::Capacity and Marshal::AllocHGlobal
|
|
var sb_get_capacity = method.Module.Import(TypeStringBuilder.Methods.First(m => m.Name == "get_Capacity"));
|
|
var alloc_hglobal = method.Module.Import(TypeMarshal.Methods.First(m => m.Name == "AllocHGlobal"));
|
|
|
|
// IntPtr ptr;
|
|
var variable_name = parameter.Name + " _sb_ptr";
|
|
body.Variables.Add(new VariableDefinition(variable_name, TypeIntPtr));
|
|
int index = body.Variables.Count - 1;
|
|
|
|
// ptr = Marshal.AllocHGlobal(sb.Capacity + 1);
|
|
il.Emit(OpCodes.Callvirt, sb_get_capacity);
|
|
il.Emit(OpCodes.Call, alloc_hglobal);
|
|
il.Emit(OpCodes.Stloc, index);
|
|
il.Emit(OpCodes.Ldloc, index);
|
|
|
|
// We'll emit the try-finally block in the epilogue implementation,
|
|
// because we haven't yet emitted all necessary instructions here.
|
|
}
|
|
|
|
static void EmitStringBuilderEpilogue(MethodDefinition wrapper, MethodDefinition native, ParameterDefinition parameter, MethodBody body, ILProcessor il)
|
|
{
|
|
var p = parameter.ParameterType;
|
|
if (p.Name == "StringBuilder")
|
|
{
|
|
// void GetShaderInfoLog(..., StringBuilder foo)
|
|
// try {
|
|
// foo_sb_ptr = Marshal.AllocHGlobal(sb.Capacity + 1); -- already emitted
|
|
// glGetShaderInfoLog(..., foo_sb_ptr); -- already emitted
|
|
// MarshalPtrToStringBuilder(foo_sb_ptr, foo);
|
|
// }
|
|
// finally {
|
|
// Marshal.FreeHGlobal(foo_sb_ptr);
|
|
// }
|
|
|
|
// Make sure we have imported BindingsBase::MasrhalPtrToStringBuilder and Marshal::FreeHGlobal
|
|
var ptr_to_sb = wrapper.Module.Import(TypeBindingsBase.Methods.First(m => m.Name == "MarshalPtrToStringBuilder"));
|
|
var free_hglobal = wrapper.Module.Import(TypeMarshal.Methods.First(m => m.Name == "FreeHGlobal"));
|
|
|
|
var block = new ExceptionHandler(ExceptionHandlerType.Finally);
|
|
block.TryStart = body.Instructions[0];
|
|
|
|
var variable_name = parameter.Name + " _sb_ptr";
|
|
var v = body.Variables.First(m => m.Name == variable_name);
|
|
il.Emit(OpCodes.Ldloc, v.Index);
|
|
il.Emit(OpCodes.Ldarg, parameter.Index);
|
|
il.Emit(OpCodes.Call, ptr_to_sb);
|
|
|
|
block.TryEnd = body.Instructions.Last();
|
|
block.HandlerStart = body.Instructions.Last();
|
|
|
|
il.Emit(OpCodes.Ldloc, v.Index);
|
|
il.Emit(OpCodes.Call, free_hglobal);
|
|
|
|
block.HandlerEnd = body.Instructions.Last();
|
|
}
|
|
}
|
|
|
|
static void EmitStringParameter(MethodDefinition wrapper, ParameterDefinition parameter, MethodBody body, ILProcessor il)
|
|
{
|
|
var p = parameter.ParameterType;
|
|
|
|
// string marshaling:
|
|
// IntPtr ptr = MarshalStringToPtr(str);
|
|
// try { calli }
|
|
// finally { Marshal.FreeHGlobal(ptr); }
|
|
var marshal_str_to_ptr = wrapper.Module.Import(TypeBindingsBase.Methods.First(m => m.Name == "MarshalStringToPtr"));
|
|
|
|
// IntPtr ptr;
|
|
var variable_name = parameter.Name + "_string_ptr";
|
|
body.Variables.Add(new VariableDefinition(variable_name, TypeIntPtr));
|
|
int index = body.Variables.Count - 1;
|
|
|
|
// ptr = Marshal.StringToHGlobalAnsi(str);
|
|
il.Emit(OpCodes.Call, marshal_str_to_ptr);
|
|
il.Emit(OpCodes.Stloc, index);
|
|
il.Emit(OpCodes.Ldloc, index);
|
|
|
|
// The finally block will be emitted in the function epilogue
|
|
}
|
|
|
|
static void EmitStringEpilogue(MethodDefinition wrapper, ParameterDefinition parameter, MethodBody body, ILProcessor il)
|
|
{
|
|
var p = parameter.ParameterType;
|
|
var free = wrapper.Module.Import(TypeBindingsBase.Methods.First(m => m.Name == "FreeStringPtr"));
|
|
|
|
// FreeStringPtr(ptr)
|
|
var variable_name = parameter.Name + "_string_ptr";
|
|
var v = body.Variables.First(m => m.Name == variable_name);
|
|
il.Emit(OpCodes.Ldloc, v.Index);
|
|
il.Emit(OpCodes.Call, free);
|
|
}
|
|
|
|
static void EmitStringArrayParameter(MethodDefinition wrapper, ParameterDefinition parameter, MethodBody body, ILProcessor il)
|
|
{
|
|
var p = parameter.ParameterType;
|
|
|
|
// string[] masrhaling:
|
|
// IntPtr ptr = MarshalStringArrayToPtr(strings);
|
|
// try { calli }
|
|
// finally { FreeStringArrayPtr(ptr); }
|
|
var marshal_str_array_to_ptr = wrapper.Module.Import(TypeBindingsBase.Methods.First(m => m.Name == "MarshalStringArrayToPtr"));
|
|
|
|
// IntPtr ptr;
|
|
var variable_name = parameter.Name + "_string_array_ptr";
|
|
body.Variables.Add(new VariableDefinition(variable_name, TypeIntPtr));
|
|
int index = body.Variables.Count - 1;
|
|
|
|
// ptr = MarshalStringArrayToPtr(strings);
|
|
il.Emit(OpCodes.Call, marshal_str_array_to_ptr);
|
|
il.Emit(OpCodes.Stloc, index);
|
|
il.Emit(OpCodes.Ldloc, index);
|
|
|
|
// The finally block will be emitted in the function epilogue
|
|
}
|
|
|
|
static void EmitStringArrayEpilogue(MethodDefinition wrapper, ParameterDefinition parameter, MethodBody body, ILProcessor il)
|
|
{
|
|
// Note: only works for string vectors (1d arrays).
|
|
// We do not (and will probably never) support 2d or higher string arrays
|
|
var p = parameter.ParameterType;
|
|
var free = wrapper.Module.Import(TypeBindingsBase.Methods.First(m => m.Name == "FreeStringArrayPtr"));
|
|
|
|
// FreeStringArrayPtr(string_array_ptr, string_array.Length)
|
|
var variable_name = parameter.Name + "_string_array_ptr";
|
|
var v = body.Variables.First(m => m.Name == variable_name);
|
|
|
|
// load string_array_ptr
|
|
il.Emit(OpCodes.Ldloc, v.Index);
|
|
|
|
// load string_array.Length
|
|
il.Emit(OpCodes.Ldarg, parameter.Index);
|
|
il.Emit(OpCodes.Ldlen);
|
|
il.Emit(OpCodes.Conv_I4);
|
|
|
|
// call FreeStringArrayPtr
|
|
il.Emit(OpCodes.Call, free);
|
|
}
|
|
|
|
static void EmitConvenienceWrapper(MethodDefinition wrapper,
|
|
MethodDefinition native, int difference, MethodBody body, ILProcessor il)
|
|
{
|
|
if (wrapper.Parameters.Count > 2)
|
|
{
|
|
// Todo: emit all parameters bar the last two
|
|
throw new NotImplementedException();
|
|
}
|
|
|
|
if (wrapper.ReturnType.Name != "Void")
|
|
{
|
|
if (difference == 2)
|
|
{
|
|
// Convert sized out-array/reference to return value, for example:
|
|
// void GenTextures(int n, int[] textures) -> int GenTexture()
|
|
// {
|
|
// const int n = 1;
|
|
// int buffers;
|
|
// calli GenTextures(n, &textures);
|
|
// return result;
|
|
// }
|
|
body.Variables.Add(new VariableDefinition(wrapper.ReturnType));
|
|
il.Emit(OpCodes.Ldc_I4, 1); // const int n = 1
|
|
il.Emit(OpCodes.Ldloca, body.Variables.Count - 1); // &buffers
|
|
}
|
|
else if (difference == 1)
|
|
{
|
|
// Convert unsized out-array/reference to return value, for example:
|
|
// void GetBoolean(GetPName pname, out bool data) -> bool GetBoolean(GetPName pname)
|
|
// {
|
|
// bool result;
|
|
// GetBooleanv(pname, &result);
|
|
// return result;
|
|
// }
|
|
body.Variables.Add(new VariableDefinition(wrapper.ReturnType));
|
|
EmitParameters(wrapper, native, body, il);
|
|
il.Emit(OpCodes.Ldloca, body.Variables.Count - 1);
|
|
}
|
|
else
|
|
{
|
|
Console.Error.WriteLine("Unknown wrapper type for ({0})", native.Name);
|
|
}
|
|
}
|
|
else
|
|
{
|
|
if (difference == 1)
|
|
{
|
|
// Convert in-array/reference to single element, for example:
|
|
// void DeleteTextures(int n, ref int textures) -> void DeleteTexture(int texture)
|
|
// {
|
|
// const int n = 1;
|
|
// calli DeleteTextures(n, &textures);
|
|
// }
|
|
il.Emit(OpCodes.Ldc_I4, 1); // const int n = 1
|
|
il.Emit(OpCodes.Ldarga, wrapper.Parameters.Last()); // &textures
|
|
}
|
|
else
|
|
{
|
|
Console.Error.WriteLine("Unknown wrapper type for ({0})", native.Name);
|
|
}
|
|
}
|
|
}
|
|
|
|
static int EmitParameters(MethodDefinition method, MethodDefinition native, MethodBody body, ILProcessor il)
|
|
{
|
|
int i;
|
|
for (i = 0; i < method.Parameters.Count; i++)
|
|
{
|
|
var parameter = method.Parameters[i];
|
|
var p = method.Module.Import(method.Parameters[i].ParameterType);
|
|
il.Emit(OpCodes.Ldarg, i);
|
|
|
|
if (p.Name.Contains("Int32") && native.Parameters[i].ParameterType.Name.Contains("IntPtr"))
|
|
{
|
|
// This is a convenience Int32 overload for an IntPtr (size_t) parameter.
|
|
// We need to convert the loaded argument to IntPtr.
|
|
il.Emit(OpCodes.Conv_I);
|
|
}
|
|
else if (p.Name == "StringBuilder")
|
|
{
|
|
EmitStringBuilderParameter(method, parameter, body, il);
|
|
}
|
|
else if (p.Name == "String" && !p.IsArray)
|
|
{
|
|
EmitStringParameter(method, parameter, body, il);
|
|
}
|
|
else if (p.IsByReference)
|
|
{
|
|
body.Variables.Add(new VariableDefinition(new PinnedType(p)));
|
|
var index = body.Variables.Count - 1;
|
|
il.Emit(OpCodes.Stloc, index);
|
|
il.Emit(OpCodes.Ldloc, index);
|
|
il.Emit(OpCodes.Conv_I);
|
|
}
|
|
else if (p.IsArray)
|
|
{
|
|
if (p.Name != method.Module.Import(typeof(string[])).Name)
|
|
{
|
|
// .Net treats 1d arrays differently than higher rank arrays.
|
|
// 1d arrays are directly supported by instructions such as ldlen and ldelema.
|
|
// Higher rank arrays must be accessed through System.Array methods such as get_Length.
|
|
// 1d array:
|
|
// check array is not null
|
|
// check ldlen array > 0
|
|
// ldc.i4.0
|
|
// ldelema
|
|
// 2d array:
|
|
// check array is not null
|
|
// check array.get_Length() > 0
|
|
// ldc.i4.0
|
|
// ldc.i4.0
|
|
// call instance T& T[0..., 0...]::Address(int32, int32)
|
|
// Mono treats everything as a 1d array.
|
|
// Interestingly, the .Net approach works on both Mono and .Net.
|
|
// The Mono approach fails when using high-rank arrays on .Net.
|
|
// We should report a bug to http://bugzilla.xamarin.com
|
|
|
|
// Pin the array and pass the address
|
|
// of its first element.
|
|
var array = (ArrayType)p;
|
|
var element_type = p.GetElementType();
|
|
body.Variables.Add(new VariableDefinition(new PinnedType(new ByReferenceType(element_type))));
|
|
int pinned_index = body.Variables.Count - 1;
|
|
|
|
var empty = il.Create(OpCodes.Ldc_I4, 0);
|
|
var pin = il.Create(OpCodes.Ldarg, i);
|
|
var end = il.Create(OpCodes.Stloc, pinned_index);
|
|
|
|
// if (array == null) goto empty
|
|
il.Emit(OpCodes.Brfalse, empty);
|
|
|
|
// else if (array.Length != 0) goto pin
|
|
il.Emit(OpCodes.Ldarg, i);
|
|
if (array.Rank == 1)
|
|
{
|
|
il.Emit(OpCodes.Ldlen);
|
|
il.Emit(OpCodes.Conv_I4);
|
|
}
|
|
else
|
|
{
|
|
var get_length = method.Module.Import(
|
|
mscorlib.MainModule.GetType("System.Array").Methods.First(m => m.Name == "get_Length"));
|
|
il.Emit(OpCodes.Callvirt, get_length);
|
|
}
|
|
il.Emit(OpCodes.Brtrue, pin);
|
|
|
|
// empty: IntPtr ptr = IntPtr.Zero
|
|
il.Append(empty);
|
|
il.Emit(OpCodes.Conv_U);
|
|
il.Emit(OpCodes.Br, end);
|
|
|
|
// pin: &array[0]
|
|
il.Append(pin);
|
|
if (array.Rank == 1)
|
|
{
|
|
// 1d array (vector), address is taken by ldelema
|
|
il.Emit(OpCodes.Ldc_I4, 0);
|
|
il.Emit(OpCodes.Ldelema, element_type);
|
|
}
|
|
else
|
|
{
|
|
// 2d-3d array, address must be taken as follows:
|
|
// call instance T& T[0..., 0..., 0...]::Address(int, int, int)
|
|
ByReferenceType t_ref = array.ElementType.MakeByReferenceType();
|
|
MethodReference get_address = new MethodReference("Address", t_ref, array);
|
|
for (int r = 0; r < array.Rank; r++)
|
|
{
|
|
get_address.Parameters.Add(new ParameterDefinition(TypeInt32));
|
|
}
|
|
get_address.HasThis = true;
|
|
|
|
// emit the get_address call
|
|
for (int r = 0; r < array.Rank; r++)
|
|
{
|
|
il.Emit(OpCodes.Ldc_I4, 0);
|
|
}
|
|
il.Emit(OpCodes.Call, get_address);
|
|
}
|
|
|
|
// end: fixed (IntPtr ptr = &array[0])
|
|
il.Append(end);
|
|
il.Emit(OpCodes.Ldloc, pinned_index);
|
|
il.Emit(OpCodes.Conv_I);
|
|
}
|
|
else
|
|
{
|
|
EmitStringArrayParameter(method, parameter, body, il);
|
|
}
|
|
}
|
|
}
|
|
return i;
|
|
}
|
|
|
|
static void EmitEntryPoint(FieldDefinition entry_points, ILProcessor il, int slot)
|
|
{
|
|
il.Emit(OpCodes.Ldsfld, entry_points);
|
|
il.Emit(OpCodes.Ldc_I4, slot);
|
|
il.Emit(OpCodes.Ldelem_I);
|
|
}
|
|
|
|
static void EmitCalli(ILProcessor il, MethodReference reference)
|
|
{
|
|
var signature = new CallSite(reference.ReturnType)
|
|
{
|
|
CallingConvention = MethodCallingConvention.StdCall,
|
|
};
|
|
|
|
foreach (var p in reference.Parameters)
|
|
{
|
|
signature.Parameters.Add(p);
|
|
}
|
|
|
|
// Since the last parameter is always the entry point address,
|
|
// we do not need any special preparation before emiting calli.
|
|
il.Emit(OpCodes.Calli, signature);
|
|
}
|
|
|
|
static void EmitCall(ILProcessor il, MethodReference reference)
|
|
{
|
|
il.Emit(OpCodes.Call, reference);
|
|
}
|
|
}
|
|
}
|