[Mono-bugs] [Bug 81296][Min] New - System.Diagnostics configuration sometimes doesn't work

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Changed by noix at sphere.pl.

http://bugzilla.ximian.com/show_bug.cgi?id=81296

--- shadow/81296	2007-04-03 10:18:16.000000000 -0400
+++ shadow/81296.tmp.5285	2007-04-03 10:18:16.000000000 -0400
@@ -0,0 +1,94 @@
+Bug#: 81296
+Product: Mono: Class Libraries
+Version: 1.2
+OS: GNU/Linux [Other]
+OS Details: Debian SID
+Status: NEW   
+Resolution: 
+Severity: Unknown
+Priority: Minor
+Component: System
+AssignedTo: mono-bugs at ximian.com                            
+ReportedBy: noix at sphere.pl               
+QAContact: mono-bugs at ximian.com
+TargetMilestone: ---
+URL: 
+Cc: 
+Summary: System.Diagnostics configuration sometimes doesn't work
+
+Description of Problem:
+system.diagnostics section of application config sometimes doesn't work.
+I'll demonstrate it with a broken TraceSwitch, but I believe the same bug
+triggers also other problems.
+
+Steps to reproduce the problem:
+1. compile "attached" SwitchTest.cs
+2. run it with "attached" SwitchTest.exe.config
+
+Actual Results:
+It prints out "Level: Off"
+
+Expected Results:
+"Level: Error" (as specified in .config)
+
+How often does this happen? 
+Every time.
+
+Additional Information:
+The problem is triggered by a TextWriterTraceListener in addition to a
+ConsoleTraceListener.
+Commenting out the second listener in TestSwitch.exe.config "solves" the
+problem.
+
+I tried to track down the problem, but having no experience in Mono, I
+couldn't find the exact place of error.
+
+However, I could establish that:
+DiagnosticsConfigurationHandler.AddTraceListeners is called several times,
+every time trying to add all listeners (I believe it shouldn't!)
+AddTraceListener throws a "Sharing violation on path log.log" exception
+when called for the second time.
+I guess that after such exception the whole system.diagnostics config
+section becomes broken in the application (but it's just a guess).
+
+
+Files used:
+
+--- SwitchTest.cs ---
+using System;
+using System.Diagnostics;
+
+namespace SwitchTest
+{
+    class Program
+    {
+        static void Main(string[] args)
+        {
+            TraceSwitch ts = new TraceSwitch("t", "t");
+            Console.WriteLine("Level: {0}", ts.Level);
+        }
+    }
+}
+--- End of SwitchTest.cs ---
+
+--- SwitchTest.exe.config ---
+<?xml version="1.0" encoding="utf-8" ?>
+<configuration>
+        <system.diagnostics>
+                <switches>
+                        <add name="t" value="1" />
+                </switches>
+                <trace>
+                        <listeners>
+                                <clear/>
+                                <add name="configConsoleListener"
+type="System.Diagnostics.ConsoleTraceListener" />
+                                <add name="logfileListener"
+                                       
+type="System.Diagnostics.TextWriterTraceListener"
+                                        initializeData="log.log" />
+                        </listeners>
+                </trace>
+        </system.diagnostics>
+</configuration>
+--- End of SwitchTest.exe.config ---