// Does the real work for an IL step.
// fStepIn - true if step in; else false for step-over.
// fVerbose - true if we should print out verbose diagnostic information.
public static void ILStepWorker(bool stepIn, bool isVerbose, string args)
{
if ((args != null) && (args.Trim().Length > 0))
{
throw new MDbgShellException("no arguments expected.");
}
// Do an IL-level step by single-stepping native code until our IL IP changes.
MDbgProcess proc = GuiExtension.Shell.Debugger.Processes.Active;
CorFrame curFrame = proc.Threads.Active.CurrentFrame.CorFrame;
uint ipNative;
uint offsetStart;
uint offsetNew;
ulong oldStackStart;
ulong oldStackEnd;
ulong newStackStart;
ulong newStackEnd;
CorDebugMappingResult result;
curFrame.GetIP(out offsetStart, out result);
curFrame.GetStackRange(out oldStackStart, out oldStackEnd);
curFrame.GetNativeIP(out ipNative);
if (isVerbose)
{
WriteOutput(String.Format(" IL step starting at offset IL_{0:x}, N=0x{1:x}, frame=({2:x},{3:x})",
offsetStart, ipNative, oldStackStart, oldStackEnd));
}
// We'll just do native single-steps until our IL ip changes.
while (true)
{
// Single step native code.
if (stepIn)
{
proc.StepInto(true).WaitOne();
}
else
{
proc.StepOver(true).WaitOne();
}
// Since we continued the process, our old frame becomes invalid and we need to get a new one.
curFrame = proc.Threads.Active.CurrentFrame.CorFrame;
curFrame.GetStackRange(out newStackStart, out newStackEnd);
if ((newStackStart != oldStackStart) || (newStackEnd != oldStackEnd))
{
// We're in a new frame. Maybe from step-in or step-out.
if (isVerbose)
{
WriteOutput(String.Format(" IL step stopping at new frame =({0:x},{1:x})", newStackStart, newStackEnd));
}
break;
}
curFrame.GetIP(out offsetNew, out result);
curFrame.GetNativeIP(out ipNative);
if ((offsetNew == offsetStart) && (proc.StopReason.GetType() == typeof(StepCompleteStopReason)))
{
if (isVerbose)
{
WriteOutput(String.Format(" IL step continuing. N=0x{0:x}", ipNative));
}
continue;
}
if (isVerbose)
{
WriteOutput(String.Format(" IL step complete at IL_{0:x}", offsetNew));
}
break;
}
}