public static DynamicMethod CreatePatchedMethod(MethodBase original, List <MethodInfo> prefixes, List <MethodInfo> postfixes, List <IILProcessor> processors)
{
var idx = prefixes.Count() + postfixes.Count();
var patch = DynamicTools.CreateDynamicMethod(original, "_Patch" + idx);
var il = patch.GetILGenerator();
var originalVariables = DynamicTools.DeclareLocalVariables(original, il);
var resultVariable = DynamicTools.DeclareReturnVar(original, il);
// TODO: this is broken because it has only one var for all patches together.
// to make this useful, we need one var for each patch pair
var privateStateVariable = DeclarePrivateStateVar(il);
var privateVars = new Dictionary <string, LocalBuilder>();
privateVars[RESULT_VAR] = resultVariable;
privateVars[STATE_VAR] = privateStateVariable;
var afterOriginal1 = il.DefineLabel();
var afterOriginal2 = il.DefineLabel();
AddPrefixes(il, original, prefixes, privateVars, afterOriginal2);
var copier = new MethodCopier(original, patch, originalVariables);
foreach (var processor in processors)
{
copier.AddReplacement(processor);
}
copier.AddReplacement(new RetToBrAfterProcessor(afterOriginal1));
copier.Emit();
il.MarkLabel(afterOriginal1);
if (resultVariable != null)
{
il.Emit(OpCodes.Stloc, resultVariable);
}
il.MarkLabel(afterOriginal2);
AddPostfixes(il, original, postfixes, privateVars);
if (resultVariable != null)
{
il.Emit(OpCodes.Ldloc, resultVariable);
}
il.Emit(OpCodes.Ret);
DynamicTools.PrepareDynamicMethod(patch);
return(patch);
}
public static DynamicMethod CreatePatchedMethod(MethodBase original, List <MethodInfo> prefixes, List <MethodInfo> postfixes, List <ICodeProcessor> processors)
{
if (MethodCopier.DEBUG_OPCODES)
{
FileLog.Log("PATCHING " + original.DeclaringType + " " + original);
}
var idx = prefixes.Count() + postfixes.Count();
var patch = DynamicTools.CreateDynamicMethod(original, "_Patch" + idx);
var il = patch.GetILGenerator();
var originalVariables = DynamicTools.DeclareLocalVariables(original, il);
var resultVariable = DynamicTools.DeclareLocalVariable(il, AccessTools.GetReturnedType(original));
var privateVars = new Dictionary <string, LocalBuilder>();
privateVars[RESULT_VAR] = resultVariable;
prefixes.ForEach(prefix =>
{
prefix.GetParameters()
.Where(patchParam => patchParam.Name == STATE_VAR)
.Do(patchParam =>
{
var privateStateVariable = DynamicTools.DeclareLocalVariable(il, patchParam.ParameterType);
privateVars[prefix.DeclaringType.FullName] = privateStateVariable;
});
});
var afterOriginal1 = il.DefineLabel();
var afterOriginal2 = il.DefineLabel();
var canHaveJump = AddPrefixes(il, original, prefixes, privateVars, afterOriginal2);
var copier = new MethodCopier(original, patch, originalVariables);
foreach (var processor in processors)
{
copier.AddReplacement(processor);
}
copier.AddReplacement(new RetToBrAfterProcessor(afterOriginal1));
copier.Emit();
Emitter.MarkLabel(il, afterOriginal1);
if (resultVariable != null)
{
Emitter.Emit(il, OpCodes.Stloc, resultVariable);
}
if (canHaveJump)
{
Emitter.MarkLabel(il, afterOriginal2);
}
AddPostfixes(il, original, postfixes, privateVars);
if (resultVariable != null)
{
Emitter.Emit(il, OpCodes.Ldloc, resultVariable);
}
Emitter.Emit(il, OpCodes.Ret);
if (MethodCopier.DEBUG_OPCODES)
{
FileLog.Log("DONE");
FileLog.Log("");
}
DynamicTools.PrepareDynamicMethod(patch);
return(patch);
}