private string GetFrameInformation(ClrThread thread, ClrStackFrame frame, ClrStackFrame firstFrame)
{
// get the method call from the given frame
string info = "";
var sourceLocation = frame.GetFileAndLineNumber();
if (sourceLocation == null)
{
info = frame.DisplayString;
}
else // it seems that GetFileAndLineNumber() does not work --> need to figure out what is the other ClrMD API to dig into the symbols
{
info = frame.DisplayString + "[" + sourceLocation.FilePath + ", Line " + sourceLocation.LineNumber.ToString() + "]";
}
// look for locking information
if (firstFrame.Method.Name.Contains("Wait") || (firstFrame.Method.Name == "Enter") && (firstFrame.Method.Type.Name == "System.Threading.Monitor"))
{
// special case for MonitorEnter --> not a WaitHandle to wait on
bool isMonitorEnter = (firstFrame.Method.Name == "Enter") && (firstFrame.Method.Type.Name == "System.Threading.Monitor");
info = info + "\r\n => " + firstFrame.Method.Type.Name + "." + firstFrame.Method.Name;
// look for object used as lock
int maxStackObjects = 10;
foreach (var so in thread.EnumerateStackObjects(true))
{
if (so == null)
{
continue;
}
var type = so.Type;
if (so.Type == null)
{
continue;
}
string typeName = so.Type.Name;
if (typeName.Contains("WaitHandle") || isMonitorEnter)
{
info = info + string.Format("({0} = 0x{1:X16})\r\n", typeName, so.Object);
break;
}
else
{
}
maxStackObjects--;
if (maxStackObjects == 0)
{
break;
}
}
}
return(info);
}
public SourceLocation GetFileAndLineNumberSafe(ClrStackFrame frame)
{
if (frame.Method == null || frame.Method.Type == null || frame.Method.Type.Module == null)
{
return(null);
}
string moduleName = frame.Method.Type.Module.Name;
if (_failedToLoadSymbols.Contains(moduleName))
{
return(null);
}
// ClrStackFrame.GetFileAndLineNumber throws occasionally when something is wrong with the module.
try
{
var location = frame.GetFileAndLineNumber();
if (location == null)
{
_failedToLoadSymbols.Add(moduleName);
}
return(location);
}
catch (ClrDiagnosticsException)
{
_failedToLoadSymbols.Add(moduleName);
return(null);
}
catch (InvalidOperationException)
{
_failedToLoadSymbols.Add(moduleName);
return(null);
}
}