public void CheckAndSaveFrame(Mono.Cecil.Cil.Instruction inst)
{
int offset = inst.Offset;
if (!catchClauses.TryGetValue(offset, out var catchClause))
{
//
// on every instruction, and in particular on entry to a 'try'
// block, we want to save the stack frame.
//
// - for the 'try' case: due to possibility of any exception
// occuring at any point within the try block, exception clauses
// always roll back to that stack frame at the top of the 'try'.
//
// - for any other instruction: because it may be the target
// of a backwards jump at the end of a loop.
//
stackMap.SaveFrame((ushort)offset, false, CilMain.Where);
}
else
{
//
// otherwise this is entry to a catch/filter/finally clause.
//
// if this is the first exception in the chain, we would also
// need to push the exception type into the stack frame,
// before saving it.
//
ExceptionClauseSetup((ushort)offset, catchClause);
}
}
void Process(int numCastableInterfaces)
{
code = newMethod.Code = new JavaCode(newMethod);
var oldLabel = code.SetLabel(0xFFFF);
locals = new CodeLocals(method, defMethod, code);
arrays = new CodeArrays(code, locals);
exceptions = new CodeExceptions(defMethodBody, code, locals);
InsertMethodInitCode(numCastableInterfaces);
code.SetLabel(oldLabel);
stackMap = code.StackMap;
stackMap.SaveFrame(0, false, CilMain.Where);
ProcessInstructions();
(code.MaxLocals, code.MaxStack) = locals.GetMaxLocalsAndStack();
locals.TrackUnconditionalBranch(null);
}