public override IEnumerable<PythonEvaluationResult> GetDebugChildren(ReprOptions reprOptions) {
yield return new PythonEvaluationResult(new ValueStore<long>(ReadElements().Count()), "len()") {
Category = DkmEvaluationResultCategory.Method
};
var reprBuilder = new ReprBuilder(reprOptions);
foreach (var entry in ReadElements()) {
reprBuilder.Clear();
reprBuilder.AppendFormat("[{0}]", entry.Key);
yield return new PythonEvaluationResult(entry.Value, reprBuilder.ToString());
}
}
public override IEnumerable <PythonEvaluationResult> GetDebugChildren(ReprOptions reprOptions)
{
yield return(new PythonEvaluationResult(new ValueStore <long>(ReadElements().Count()), "len()")
{
Category = DkmEvaluationResultCategory.Method
});
var reprBuilder = new ReprBuilder(reprOptions);
foreach (var entry in ReadElements())
{
reprBuilder.Clear();
reprBuilder.AppendFormat("[{0}]", entry.Key);
yield return(new PythonEvaluationResult(entry.Value, reprBuilder.ToString()));
}
}
/// <summary>
/// Tries to evaluate the given expression by treating it as a chain of member access and indexing operations (e.g. <c>fob[0].oar.baz['abc'].blah</c>),
/// and looking up the corresponding members in data model provided by <see cref="GetFrameLocals"/>.
/// </summary>
/// <param name="vars">List of variables, in the context of which the expression is evaluated.</param>
/// <returns>
/// <c>true</c> if evaluation was successful, or if it failed and no fallback is possible (e.g. expression is invalid).
/// <c>false</c> if evaluation was not successful due to the limitations of this evaluator, and it may be possible to evaluate it correctly by other means.
/// </returns>
private bool EvaluateExpressionByWalkingObjects(IEnumerable<DkmSuccessEvaluationResult> vars, DkmInspectionContext inspectionContext, DkmWorkList workList, DkmLanguageExpression expression, DkmStackWalkFrame stackFrame, DkmCompletionRoutine<DkmEvaluateExpressionAsyncResult> completionRoutine) {
var pyrtInfo = stackFrame.Thread.Process.GetPythonRuntimeInfo();
var parserOptions = new ParserOptions { ErrorSink = new StringErrorSink() };
var parser = Parser.CreateParser(new StringReader(expression.Text), pyrtInfo.LanguageVersion, parserOptions);
var expr = ((ReturnStatement)parser.ParseTopExpression().Body).Expression;
string errorText = parserOptions.ErrorSink.ToString();
if (!string.IsNullOrEmpty(errorText)) {
completionRoutine(new DkmEvaluateExpressionAsyncResult(DkmFailedEvaluationResult.Create(
inspectionContext, stackFrame, expression.Text, expression.Text,
errorText, DkmEvaluationResultFlags.Invalid, null)));
return true;
}
// Unroll the AST into a sequence of member access and indexing operations, if possible.
var path = new Stack<string>();
var reprBuilder = new ReprBuilder(new ReprOptions(stackFrame.Thread.Process));
while (true) {
var memberExpr = expr as MemberExpression;
if (memberExpr != null) {
path.Push(memberExpr.Name);
expr = memberExpr.Target;
continue;
}
var indexingExpr = expr as IndexExpression;
if (indexingExpr != null) {
var indexExpr = indexingExpr.Index as ConstantExpression;
if (indexExpr != null) {
reprBuilder.Clear();
reprBuilder.AppendFormat("[{0:PY}]", indexExpr.Value);
path.Push(reprBuilder.ToString());
expr = indexingExpr.Target;
continue;
}
}
break;
}
var varExpr = expr as NameExpression;
if (varExpr == null) {
return false;
}
path.Push(varExpr.Name);
// Walk the path through Locals
while (true) {
var name = path.Pop();
var evalResult = vars.FirstOrDefault(er => er.Name == name);
if (evalResult == null) {
return false;
}
if (path.Count == 0) {
// Clone the evaluation result, but use expression text as its name.
DkmDataItem dataItem =
(DkmDataItem)evalResult.GetDataItem<PyObjectEvaluationResult>() ??
(DkmDataItem)evalResult.GetDataItem<GlobalsEvaluationResult>() ??
(DkmDataItem)evalResult.GetDataItem<CppViewEvaluationResult>() ??
(DkmDataItem)evalResult.GetDataItem<RawEvaluationResult>();
evalResult = DkmSuccessEvaluationResult.Create(
evalResult.InspectionContext,
evalResult.StackFrame,
expression.Text,
expression.Text,
evalResult.Flags,
evalResult.Value,
evalResult.EditableValue,
evalResult.Type,
evalResult.Category,
evalResult.Access,
evalResult.StorageType,
evalResult.TypeModifierFlags,
evalResult.Address,
evalResult.CustomUIVisualizers,
evalResult.ExternalModules,
dataItem);
completionRoutine(new DkmEvaluateExpressionAsyncResult(evalResult));
return true;
}
var childWorkList = DkmWorkList.Create(null);
evalResult.GetChildren(childWorkList, 0, inspectionContext, getChildrenResult =>
getChildrenResult.EnumContext.GetItems(childWorkList, 0, int.MaxValue, getItemsResult =>
vars = getItemsResult.Items.OfType<DkmSuccessEvaluationResult>()));
childWorkList.Execute();
}
}
public List<DkmEvaluationResult> GetChildren(ExpressionEvaluator exprEval, DkmEvaluationResult result, DkmInspectionContext inspectionContext) {
var stackFrame = result.StackFrame;
var cppEval = new CppExpressionEvaluator(inspectionContext, stackFrame);
var obj = ValueStore.Read();
var evalResults = new List<DkmEvaluationResult>();
var reprOptions = new ReprOptions(inspectionContext);
var reprBuilder = new ReprBuilder(reprOptions);
if (DebuggerOptions.ShowCppViewNodes && !HasCppView) {
if (CppTypeName == null) {
// Try to guess the object's C++ type by looking at function pointers in its PyTypeObject. If they are pointing
// into a module for which symbols are available, C++ EE should be able to resolve them into something like
// "0x1e120d50 {python33_d.dll!list_dealloc(PyListObject *)}". If we are lucky, one of those functions will have
// the first argument declared as a strongly typed pointer, rather than PyObject* or void*.
CppTypeName = "PyObject";
CppTypeModuleName = null;
foreach (string methodField in _methodFields) {
var funcPtrEvalResult = cppEval.TryEvaluateObject(null, "PyObject", obj.Address, ".ob_type->" + methodField) as DkmSuccessEvaluationResult;
if (funcPtrEvalResult == null || funcPtrEvalResult.Value.IndexOf('{') < 0) {
continue;
}
var match = _cppFirstArgTypeFromFuncPtrRegex.Match(funcPtrEvalResult.Value);
string module = match.Groups["module"].Value;
string firstArgType = match.Groups["type"].Value;
if (firstArgType != "void" && firstArgType != "PyObject" && firstArgType != "_object") {
CppTypeName = firstArgType;
CppTypeModuleName = module;
break;
}
}
}
string cppExpr = CppExpressionEvaluator.GetExpressionForObject(CppTypeModuleName, CppTypeName, obj.Address, ",!");
var evalResult = DkmIntermediateEvaluationResult.Create(
inspectionContext, stackFrame, "[C++ view]", "{C++}" + cppExpr, cppExpr,
CppExpressionEvaluator.CppLanguage, stackFrame.Process.GetNativeRuntimeInstance(), null);
evalResults.Add(evalResult);
}
int i = 0;
foreach (var child in obj.GetDebugChildren(reprOptions).Take(MaxDebugChildren)) {
if (child.Name == null) {
reprBuilder.Clear();
reprBuilder.AppendFormat("[{0:PY}]", i++);
child.Name = reprBuilder.ToString();
}
DkmEvaluationResult evalResult;
if (child.ValueStore is IValueStore<PyObject>) {
evalResult = exprEval.CreatePyObjectEvaluationResult(inspectionContext, stackFrame, FullName, child, cppEval);
} else {
var value = child.ValueStore.Read();
reprBuilder.Clear();
reprBuilder.AppendLiteral(value);
string type = null;
if (Process.GetPythonRuntimeInfo().LanguageVersion <= PythonLanguageVersion.V27) {
_typeMapping2x.TryGetValue(value.GetType(), out type);
}
if (type == null) {
_typeMapping.TryGetValue(value.GetType(), out type);
}
var flags = DkmEvaluationResultFlags.ReadOnly;
if (value is string) {
flags |= DkmEvaluationResultFlags.RawString;
}
string childFullName = child.Name;
if (FullName != null) {
if (childFullName.EndsWith("()")) { // len()
childFullName = childFullName.Substring(0, childFullName.Length - 2) + "(" + FullName + ")";
} else {
if (!childFullName.StartsWith("[")) { // [0], ['fob'] etc
childFullName = "." + childFullName;
}
childFullName = FullName + childFullName;
}
}
evalResult = DkmSuccessEvaluationResult.Create(
inspectionContext, stackFrame, child.Name, childFullName, flags, reprBuilder.ToString(), null, type,
child.Category, child.AccessType, child.StorageType, child.TypeModifierFlags, null, null, null,
new RawEvaluationResult { Value = value });
}
evalResults.Add(evalResult);
}
return evalResults;
}