private static bool DebuggerLoop(VirtualMachine vm, Debugger debugger, VMDebugger vmDebugger)
{
Console.Write("(moncdbg) ");
string line = Console.ReadLine();
string[] args;
if (line != null)
{
args = line.Split(' ', StringSplitOptions.RemoveEmptyEntries);
}
else
{
args = Array.Empty <string>();
}
string command = "";
if (args.Length > 0)
{
command = args[0];
}
switch (command)
{
case "reg": {
StackFrameInfo frame = vm.GetStackFrame(0);
Console.WriteLine($"Function: {frame.Function}, PC: {frame.PC}");
string?sourcePath;
int lineNumber;
if (debugger.GetSourceLocation(frame, out sourcePath, out lineNumber))
{
Console.WriteLine($"File: {sourcePath}, Line: {lineNumber + 1}");
}
}
break;
case "read":
StackFrameMemory memory = vm.GetStackFrameMemory(0);
for (int i = 0, ilen = memory.Size; i < ilen; ++i)
{
if (i % 4 == 0 && i != 0)
{
Console.WriteLine();
}
Console.Write(memory.Read(i) + "\t");
}
Console.WriteLine();
break;
case "bp": {
if (args.Length < 2)
{
Console.WriteLine("Not enough args");
break;
}
int breakpointLineNumber;
int.TryParse(args[1], out breakpointLineNumber);
StackFrameInfo frame = vm.GetStackFrame(0);
string? sourcePath;
if (!debugger.GetSourceLocation(frame, out sourcePath, out _))
{
sourcePath = "";
}
Console.WriteLine($"Assuming source file is {sourcePath}");
debugger.SetBreakpoint(sourcePath !, breakpointLineNumber - 1);
}
break;
case "over":
return(vmDebugger.StepOver());
case "into":
return(vmDebugger.StepInto());
case "out":
return(vmDebugger.StepOut());
case "step":
return(vmDebugger.Step());
case "continue":
case null:
return(vmDebugger.Continue());
case "":
break;
default:
Console.Error.WriteLine($"moncdbg: unknown command {line}");
break;
}
return(true);
}
