/// <summary>
/// This method is called by the debug engine to compile an expression that the user wants
/// to evaluate. Before the call, we have the text of the expression and information about
/// the context we want to evaluate in (code location, evaluation flags, etc.). The result
/// of the call is a "query" containing IL the debugger will execute to get the
/// result of the expression.
/// </summary>
/// <param name="expression">This is the raw expression to compile</param>
/// <param name="instructionAddress">Instruction address or code location to use as the
/// context of the compilation.</param>
/// <param name="inspectionContext">Context of the evaluation. This contains options/flags
/// to be used during compilation. It also contains the InspectionSession. The inspection
/// session is the object that provides lifetime management for our objects. When the user
/// steps or continues the process, the debug engine will dispose of the inspection session</param>
/// <param name="error">[Out] If the there are any compile errors, this parameter is set to
/// the error message to display to the user</param>
/// <param name="result">[Out] If compilation was successful, this is the output query.</param>
void IDkmClrExpressionCompiler.CompileExpression(
DkmLanguageExpression expression,
DkmClrInstructionAddress instructionAddress,
DkmInspectionContext inspectionContext,
out string error,
out DkmCompiledClrInspectionQuery result)
{
error = null;
result = null;
expression.CompileExpression(instructionAddress, inspectionContext, out error, out result);
return;
}
/// <summary>
/// This method is called by the debug engine to compile an expression that the user wants
/// to evaluate. Before the call, we have the text of the expression and information about
/// the context we want to evaluate in (code location, evaluation flags, etc.). The result
/// of the call is a "query" containing IL the debugger will execute to get the
/// result of the expression.
/// </summary>
/// <param name="expression">This is the raw expression to compile</param>
/// <param name="instructionAddress">Instruction address or code location to use as the
/// context of the compilation.</param>
/// <param name="inspectionContext">Context of the evaluation. This contains options/flags
/// to be used during compilation. It also contains the InspectionSession. The inspection
/// session is the object that provides lifetime management for our objects. When the user
/// steps or continues the process, the debug engine will dispose of the inspection session</param>
/// <param name="error">[Out] If the there are any compile errors, this parameter is set to
/// the error message to display to the user</param>
/// <param name="result">[Out] If compilation was successful, this is the output query.</param>
void IDkmClrExpressionCompiler.CompileExpression(
DkmLanguageExpression expression,
DkmClrInstructionAddress instructionAddress,
DkmInspectionContext inspectionContext,
out string error,
out DkmCompiledClrInspectionQuery result)
{
error = null;
result = null;
bool changed = false;
string originalExpr = expression.Text;
// We use a trick to change the Text when sending it to C#, by retrieveing the field info.
// This field has a property get but not a property set.
var fi = typeof(DkmLanguageExpression).GetField("m_Text", System.Reflection.BindingFlags.Instance | System.Reflection.BindingFlags.NonPublic);
if (fi != null)
{
var newexpr = originalExpr;
if (expression.Text.StartsWith("SELF", System.StringComparison.OrdinalIgnoreCase))
{
changed = true;
newexpr = "this" + originalExpr.Substring(4);
}
else if (expression.Text.StartsWith("SUPER", System.StringComparison.OrdinalIgnoreCase))
{
changed = true;
newexpr = "base" + originalExpr.Substring(5);
}
if (newexpr.Contains(":"))
{
newexpr = newexpr.Replace(':', '.');
changed = true;
}
// check for literal array
//var lbrkt = newexpr.IndexOf('[');
//var rbrkt = newexpr.IndexOf(']');
//if (lbrkt > 0 && rbrkt > 0 && lbrkt < rbrkt)
//{
// newexpr = AdjustArrayIndices(newexpr, ref changed);
//}
if (changed && fi != null)
{
fi.SetValue(expression, newexpr);
}
}
expression.CompileExpression(instructionAddress, inspectionContext, out error, out result);
if (changed && fi != null)
{
fi.SetValue(expression, originalExpr);
}
return;
}