// This method evaluates the expression asynchronously.
// This method should return immediately after it has started the expression evaluation.
// When the expression is successfully evaluated, an IDebugExpressionEvaluationCompleteEvent2
// must be sent to the IDebugEventCallback2 event callback
int IDebugExpression2.EvaluateAsync(enum_EVALFLAGS dwFlags, IDebugEventCallback2 pExprCallback) {
_tokenSource = new CancellationTokenSource();
_frame.StackFrame.ExecuteTextAsync(_expression, _tokenSource.Token)
.ContinueWith(p => {
try {
IDebugProperty2 property;
if (p.Exception != null && p.Exception.InnerException != null) {
property = new AD7EvalErrorProperty(p.Exception.InnerException.Message);
} else if (p.IsCanceled) {
property = new AD7EvalErrorProperty("Evaluation canceled");
} else if (p.IsFaulted || p.Result == null) {
property = new AD7EvalErrorProperty("Error");
} else {
property = new AD7Property(_frame, p.Result);
}
_tokenSource.Token.ThrowIfCancellationRequested();
_frame.Engine.Send(
new AD7ExpressionEvaluationCompleteEvent(this, property),
AD7ExpressionEvaluationCompleteEvent.IID,
_frame.Engine,
_frame.Thread);
} finally {
_tokenSource.Dispose();
_tokenSource = null;
}
}, _tokenSource.Token);
return VSConstants.S_OK;
}
// Construct an instance of IEnumDebugPropertyInfo2 for the parameters collection only.
private List <DEBUG_PROPERTY_INFO> CreateParameterProperties(uint radix)
{
var properties = new List <DEBUG_PROPERTY_INFO>();
var parameters = this._stackFrame.Parameters;
for (var i = 0; i < parameters.Count; i++)
{
var property = new AD7Property(this, parameters[i]);
properties.Add(
property.ConstructDebugPropertyInfo(
radix,
enum_DEBUGPROP_INFO_FLAGS.DEBUGPROP_INFO_STANDARD | enum_DEBUGPROP_INFO_FLAGS.DEBUGPROP_INFO_FULLNAME
)
);
}
return(properties);
}
// Construct an instance of IEnumDebugPropertyInfo2 for the locals collection only.
private List <DEBUG_PROPERTY_INFO> CreateLocalProperties(uint radix)
{
var properties = new List <DEBUG_PROPERTY_INFO>();
IList <NodeEvaluationResult> locals = _stackFrame.Locals;
for (int i = 0; i < locals.Count; i++)
{
var property = new AD7Property(this, locals[i]);
properties.Add(
property.ConstructDebugPropertyInfo(
radix,
enum_DEBUGPROP_INFO_FLAGS.DEBUGPROP_INFO_STANDARD | enum_DEBUGPROP_INFO_FLAGS.DEBUGPROP_INFO_FULLNAME
)
);
}
return(properties);
}
// This method evaluates the expression asynchronously.
// This method should return immediately after it has started the expression evaluation.
// When the expression is successfully evaluated, an IDebugExpressionEvaluationCompleteEvent2
// must be sent to the IDebugEventCallback2 event callback
int IDebugExpression2.EvaluateAsync(enum_EVALFLAGS dwFlags, IDebugEventCallback2 pExprCallback)
{
this._tokenSource = new CancellationTokenSource();
this._frame.StackFrame.ExecuteTextAsync(this._expression, this._tokenSource.Token)
.ContinueWith(p =>
{
try
{
IDebugProperty2 property;
if (p.Exception != null && p.Exception.InnerException != null)
{
property = new AD7EvalErrorProperty(p.Exception.InnerException.Message);
}
else if (p.IsCanceled)
{
property = new AD7EvalErrorProperty("Evaluation canceled");
}
else if (p.IsFaulted || p.Result == null)
{
property = new AD7EvalErrorProperty("Error");
}
else
{
property = new AD7Property(this._frame, p.Result);
}
this._tokenSource.Token.ThrowIfCancellationRequested();
this._frame.Engine.Send(
new AD7ExpressionEvaluationCompleteEvent(this, property),
AD7ExpressionEvaluationCompleteEvent.IID,
this._frame.Engine,
this._frame.Thread);
}
finally
{
this._tokenSource.Dispose();
this._tokenSource = null;
}
}, this._tokenSource.Token);
return(VSConstants.S_OK);
}
public AD7Property(AD7StackFrame frame, NodeEvaluationResult evaluationResult, AD7Property parent = null) {
_evaluationResult = evaluationResult;
_parent = parent;
_frame = frame;
}
// Enumerates the children of a property. This provides support for dereferencing pointers, displaying members of an array, or fields of a class or struct.
// The sample debugger only supports pointer dereferencing as children. This means there is only ever one child.
public int EnumChildren(enum_DEBUGPROP_INFO_FLAGS dwFields, uint dwRadix, ref Guid guidFilter, enum_DBG_ATTRIB_FLAGS dwAttribFilter, string pszNameFilter, uint dwTimeout, out IEnumDebugPropertyInfo2 ppEnum) {
TimeSpan timeout = TimeSpan.FromMilliseconds(dwTimeout);
var tokenSource = new CancellationTokenSource(timeout);
List<NodeEvaluationResult> children = _evaluationResult.GetChildrenAsync(tokenSource.Token)
.WaitAsync(timeout, tokenSource.Token).Result;
DEBUG_PROPERTY_INFO[] properties;
if (children == null || children.Count == 0) {
properties = new[] { new DEBUG_PROPERTY_INFO { dwFields = enum_DEBUGPROP_INFO_FLAGS.DEBUGPROP_INFO_NAME, bstrValue = "No children" } };
} else {
properties = new DEBUG_PROPERTY_INFO[children.Count];
for (int i = 0; i < children.Count; i++) {
properties[i] = new AD7Property(_frame, children[i], this).ConstructDebugPropertyInfo(dwRadix, dwFields);
}
}
if (dwFields.HasFlag(enum_DEBUGPROP_INFO_FLAGS.DEBUGPROP_INFO_NAME)) {
properties = properties.OrderBy(p => p.bstrName, _comparer).ToArray();
}
ppEnum = new AD7PropertyEnum(properties);
return VSConstants.S_OK;
}
public AD7Property(AD7StackFrame frame, NodeEvaluationResult evaluationResult, AD7Property parent = null)
{
this._evaluationResult = evaluationResult;
this._parent = parent;
this._frame = frame;
}
// Construct an instance of IEnumDebugPropertyInfo2 for the parameters collection only.
private List<DEBUG_PROPERTY_INFO> CreateParameterProperties(uint radix) {
var properties = new List<DEBUG_PROPERTY_INFO>();
IList<NodeEvaluationResult> parameters = _stackFrame.Parameters;
for (int i = 0; i < parameters.Count; i++) {
var property = new AD7Property(this, parameters[i]);
properties.Add(
property.ConstructDebugPropertyInfo(
radix,
enum_DEBUGPROP_INFO_FLAGS.DEBUGPROP_INFO_STANDARD | enum_DEBUGPROP_INFO_FLAGS.DEBUGPROP_INFO_FULLNAME
)
);
}
return properties;
}
// This method evaluates the expression synchronously.
int IDebugExpression2.EvaluateSync(enum_EVALFLAGS dwFlags, uint dwTimeout, IDebugEventCallback2 pExprCallback, out IDebugProperty2 ppResult) {
TimeSpan timeout = TimeSpan.FromMilliseconds(dwTimeout);
var tokenSource = new CancellationTokenSource(timeout);
ppResult = null;
NodeEvaluationResult result;
try {
result = _frame.StackFrame.ExecuteTextAsync(_expression, tokenSource.Token).WaitAsync(timeout, tokenSource.Token).WaitAndUnwrapExceptions();
} catch (DebuggerCommandException ex) {
ppResult = new AD7EvalErrorProperty(ex.Message);
return VSConstants.S_OK;
} catch (OperationCanceledException) {
return DebuggerConstants.E_EVALUATE_TIMEOUT;
}
if (result == null) {
return VSConstants.E_FAIL;
}
ppResult = new AD7Property(_frame, result);
return VSConstants.S_OK;
}
