public void Disassemble(MethodBody body, MemberMapping methodMapping)
{
// start writing IL code
MethodDefinition method = body.Method;
output.WriteLine("// Method begins at RVA 0x{0:x4}", method.RVA);
output.WriteLine("// Code size {0} (0x{0:x})", body.CodeSize);
output.WriteLine(".maxstack {0}", body.MaxStackSize);
if (method.DeclaringType.Module.Assembly.EntryPoint == method)
output.WriteLine (".entrypoint");
if (method.Body.HasVariables) {
output.Write(".locals ");
if (method.Body.InitLocals)
output.Write("init ");
output.WriteLine("(");
output.Indent();
foreach (var v in method.Body.Variables) {
output.WriteDefinition("[" + v.Index + "] ", v);
v.VariableType.WriteTo(output);
if (!string.IsNullOrEmpty(v.Name)) {
output.Write(' ');
output.Write(DisassemblerHelpers.Escape(v.Name));
}
if (v.Index + 1 < method.Body.Variables.Count)
output.Write(',');
output.WriteLine();
}
output.Unindent();
output.WriteLine(")");
}
output.WriteLine();
if (detectControlStructure && body.Instructions.Count > 0) {
Instruction inst = body.Instructions[0];
HashSet<int> branchTargets = GetBranchTargets(body.Instructions);
WriteStructureBody(new ILStructure(body), branchTargets, ref inst, methodMapping, method.Body.CodeSize);
} else {
foreach (var inst in method.Body.Instructions) {
inst.WriteTo(output);
if (methodMapping != null) {
// add IL code mappings - used in debugger
methodMapping.MemberCodeMappings.Add(
new SourceCodeMapping() {
SourceCodeLine = output.CurrentLine,
ILInstructionOffset = new ILRange { From = inst.Offset, To = inst.Next == null ? method.Body.CodeSize : inst.Next.Offset },
MemberMapping = methodMapping
});
}
output.WriteLine();
}
if (method.Body.HasExceptionHandlers) {
output.WriteLine();
foreach (var eh in method.Body.ExceptionHandlers) {
eh.WriteTo(output);
output.WriteLine();
}
}
}
}
/// <summary>
/// Create code mapping for a method.
/// </summary>
/// <param name="method">Method to create the mapping for.</param>
/// <param name="codeMappings">Source code mapping storage.</param>
/// <param name="actualMemberReference">The actual member reference.</param>
internal static MemberMapping CreateCodeMapping(
this MethodDefinition member,
List<MemberMapping> codeMappings,
MemberReference actualMemberReference = null)
{
if (member == null || !member.HasBody)
return null;
if (codeMappings == null)
return null;
// create IL/CSharp code mappings - used in debugger
MemberMapping currentMemberMapping = null;
if (codeMappings.Any(map => map.MetadataToken == member.MetadataToken.ToInt32()))
{
currentMemberMapping = new MemberMapping()
{
MetadataToken = member.MetadataToken.ToInt32(),
MemberCodeMappings = new List<SourceCodeMapping>(),
MemberReference = actualMemberReference ?? member,
CodeSize = member.Body.CodeSize
};
codeMappings.Add(currentMemberMapping);
}
return currentMemberMapping;
}
void WriteStructureBody(ILStructure s, HashSet<int> branchTargets, ref Instruction inst, MemberMapping currentMethodMapping, int codeSize)
{
bool isFirstInstructionInStructure = true;
bool prevInstructionWasBranch = false;
int childIndex = 0;
while (inst != null && inst.Offset < s.EndOffset) {
int offset = inst.Offset;
if (childIndex < s.Children.Count && s.Children[childIndex].StartOffset <= offset && offset < s.Children[childIndex].EndOffset) {
ILStructure child = s.Children[childIndex++];
WriteStructureHeader(child);
WriteStructureBody(child, branchTargets, ref inst, currentMethodMapping, codeSize);
WriteStructureFooter(child);
} else {
if (!isFirstInstructionInStructure && (prevInstructionWasBranch || branchTargets.Contains(offset))) {
output.WriteLine(); // put an empty line after branches, and in front of branch targets
}
inst.WriteTo(output);
// add IL code mappings - used in debugger
if (currentMethodMapping != null) {
currentMethodMapping.MemberCodeMappings.Add(
new SourceCodeMapping() {
SourceCodeLine = output.CurrentLine,
ILInstructionOffset = new ILRange { From = inst.Offset, To = inst.Next == null ? codeSize : inst.Next.Offset },
MemberMapping = currentMethodMapping
});
}
output.WriteLine();
prevInstructionWasBranch = inst.OpCode.FlowControl == FlowControl.Branch
|| inst.OpCode.FlowControl == FlowControl.Cond_Branch
|| inst.OpCode.FlowControl == FlowControl.Return
|| inst.OpCode.FlowControl == FlowControl.Throw;
inst = inst.Next;
}
isFirstInstructionInStructure = false;
}
}