//
// IEnumerator interface
//
public bool MoveNext()
{
ICorDebugChain[] a = new ICorDebugChain[1];
uint c = 0;
int r = m_enum.Next ((uint)a.Length, a, out c);
if (r==0 && c==1) // S_OK && we got 1 new element
m_chain = new CorChain (a[0]);
else
m_chain = null;
return m_chain != null;
}
//
// IEnumerator interface
//
public bool MoveNext()
{
ICorDebugChain[] a = new ICorDebugChain[1];
uint c = 0;
int r = m_enum.Next((uint)a.Length, a, out c);
if (r == 0 && c == 1) // S_OK && we got 1 new element
{
m_chain = new CorChain(a[0]);
}
else
{
m_chain = null;
}
return(m_chain != null);
}
public void Reset()
{
m_enum.Reset ();
m_chain = null;
}
/// <summary>
/// Unwind unmanaged frames within an native chain.
/// </summary>
/// <param name="thread">thread containing chain</param>
/// <param name="nativeChain">a native CorChain</param>
/// <returns>enumeration of MDbgFrames for the native frames</returns>
/// <remarks>ICorDebug stackwalking only unwinds managed chains.
/// A derived class can override this function to provide native stacktracing.</remarks>
protected virtual IEnumerable<MDbgFrame> UnwindNativeFrames(MDbgThread thread, CorChain nativeChain)
{
Debug.Assert(!nativeChain.IsManaged);
// Base class can't unwind unmanaged chains.
// A derived class can override and provide native stack unwinding.
// Use:
// 1) chain.RegisterSet to get the starting context.
// 2) chain.GetStackRange(out start, out end); to get the stackrange to unwind to
// 3) a native unwinder (such as DbgHelp.dll) to actually do the native stack unwinding.
yield break;
}
/// <summary>
/// The function should parse the native part of the stack and fill the m_frameCache with the
/// corresponding frames from the native chain. Further it should return the top-most frame in the chain.
/// </summary>
/// <param name="chain">the native chain on the stack</param>
/// <returns>First frame from the native chain or null if there are no frames</returns>
protected virtual MDbgFrame FillAndGetLeafFrameFromNativeChain(CorChain chain)
{
Debug.Assert(chain != null);
Debug.Assert(!chain.IsManaged);
// StackWalkers that support interop callstacks would want to fill the list of frames and return
// topmost native frame from that chain.
return null;
}
public void Reset()
{
m_enum.Reset();
m_chain = null;
}