/// <summary>
/// Executes until the currently executed method's point of return has been reached.
/// </summary>
public void StepOut(DebugThread th)
{
var returnPtr = APIIntermediate.Read<IntPtr>(th.OwnerProcess.Handle, new IntPtr( th.Context.lastReadCtxt.ebp + 4));
var tempBreakPoint = Breakpoints.ByAddress(returnPtr);
bool keepBpAfterStepComplete = false;
if (keepBpAfterStepComplete = tempBreakPoint == null)
tempBreakPoint = Breakpoints.CreateBreakpoint(returnPtr);
th.ContinueDebugging();
Debuggee.WaitForDebugEvent();
if (!keepBpAfterStepComplete)
Breakpoints.Remove(tempBreakPoint);
}
/// <summary>
/// See <see cref="StepIn"/>.
/// If there's a call as next instruction, it'll be skipped.
/// </summary>
public void StepOver(DebugThread th)
{
var code = APIIntermediate.ReadArray<byte>(th.OwnerProcess.Handle, th.CurrentInstruction, DisAsm86.MaximumInstructionLength);
int instructionLength = 0;
var instrType = DisAsm86.GetInstructionType(code, false, out instructionLength);
/*
* If there's a call, set a breakpoint right after the call to skip the called subroutine
*/
if (instrType == InstructionType.Call)
{
var bpAddr = IntPtr.Add(th.CurrentInstruction, instructionLength);
var tempBreakPoint = Breakpoints.ByAddress(bpAddr);
bool keepBpAfterStepComplete = false;
if (keepBpAfterStepComplete = tempBreakPoint == null)
tempBreakPoint = Breakpoints.CreateBreakpoint(bpAddr);
th.ContinueDebugging();
Debuggee.WaitForDebugEvent();
if (!keepBpAfterStepComplete)
Breakpoints.Remove(tempBreakPoint);
}
else
StepIn(th);
}
/// <summary>
/// Executes the next single code instruction.
/// Returns false if the single step could be executed but wasn't completed due to a breakpoint or an other exception/debug event.
/// </summary>
bool StepToNextInstruction(DebugThread th)
{
if (!Debuggee.IsAlive)
return false;
if (lastUnhandledBreakpoint != null)
SkipAndRestoreLastBreakpoint(false);
bool lastStepState = th.Context.TrapFlagSet;
if (!lastStepState)
th.Context.TrapFlagSet = true;
th.ContinueDebugging();
expectsSingleStep = true;
Debuggee.WaitForDebugEvent();
//TODO: What if there's a non-ss exception?
// Answer: return false
if (!lastStepState)
th.Context.TrapFlagSet = false;
return !expectsSingleStep;
}
