Criteo-dotnet-blog
Criteo-dotnet-blog
/ TimerInfo.cs
Created
April 24, 2017 07:42
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| public class TimerInfo | |
| { | |
| public ulong TimerQueueTimerAddress { get; set; } | |
| public uint DueTime { get; set; } | |
| public uint Period { get; set; } | |
| public bool Cancelled { get; set; } | |
| public ulong StateAddress { get; set; } | |
| public string StateTypeName { get; set; } | |
| public ulong ThisAddress { get; set; } | |
| public string MethodName { get; set; } |
Criteo-dotnet-blog
/ EnumerateTimers-1
Created
April 24, 2017 07:45
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| public IEnumerable<TimerInfo> EnumerateTimers(ClrRuntime runtime) | |
| { | |
| ClrHeap heap = runtime.GetHeap(); | |
| if (!heap.CanWalkHeap) | |
| yield break; |
Criteo-dotnet-blog
/ GetMscorlib.cs
Created
April 24, 2017 07:49
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| private ClrModule GetMscorlib(ClrRuntime runtime) | |
| { | |
| foreach (ClrModule module in runtime.Modules) | |
| if (module.AssemblyName.Contains("mscorlib.dll")) | |
| return module; | |
| // Uh oh, this shouldn't have happened. Let's look more carefully (slowly). | |
| foreach (ClrModule module in runtime.Modules) | |
| if (module.AssemblyName.ToLower().Contains("mscorlib")) | |
| return module; |
Criteo-dotnet-blog
/ EnumerateTimers-2.cs
Created
April 24, 2017 07:51
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| var timerQueueType = GetMscorlib(runtime).GetTypeByName("System.Threading.TimerQueue"); |
Criteo-dotnet-blog
/ EnumerateTimers-3.cs
Created
April 24, 2017 07:52
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| ClrStaticField staticField = timerQueueType.GetStaticFieldByName("s_queue"); |
Criteo-dotnet-blog
/ EnumerateTimers-4.cs
Created
April 24, 2017 07:55
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| foreach (ClrAppDomain domain in runtime.AppDomains) | |
| { | |
| ulong? timerQueue = (ulong?)staticField.GetValue(domain); | |
| if (!timerQueue.HasValue || timerQueue.Value == 0) | |
| continue; |
Criteo-dotnet-blog
/ GetFieldValue.cs
Created
April 24, 2017 07:57
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| private object GetFieldValue(ClrHeap heap, ulong address, string fieldName) | |
| { | |
| var type = heap.GetObjectType(address); | |
| ClrInstanceField field = type.GetFieldByName(fieldName); | |
| if (field == null) | |
| return null; | |
| return field.GetValue(address); | |
| } |
Criteo-dotnet-blog
/ EnumerateTimers-5.cs
Last active
January 11, 2018 14:39
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| // m_timers is the start of the list of TimerQueueTimer | |
| var currentPointer = GetFieldValue(heap, timerQueue.Value, "m_timers"); | |
| while ((currentPointer != null) && (((ulong)currentPointer) != 0)) | |
| { | |
| // currentPointer points to a TimerQueueTimer instance | |
| ulong currentTimerQueueTimerRef = (ulong)currentPointer; | |
| TimerInfo ti = new TimerInfo() | |
| { |
Criteo-dotnet-blog
/ TimerQueueTimerFields.cs
Created
May 29, 2017 11:00
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| var val = GetFieldValue(heap, currentTimerQueueTimerRef, "m_dueTime"); | |
| ti.DueTime = (uint)val; | |
| val = GetFieldValue(heap, currentTimerQueueTimerRef, "m_period"); | |
| ti.Period = (uint)val; | |
| val = GetFieldValue(heap, currentTimerQueueTimerRef, "m_canceled"); | |
| ti.Cancelled = (bool)val; |
Criteo-dotnet-blog
/ TimerQueueTimerState.cs
Created
May 29, 2017 11:02
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| val = GetFieldValue(heap, currentTimerQueueTimerRef, "m_state"); | |
| ti.StateTypeName = ""; | |
| if (val == null) | |
| { | |
| ti.StateAddress = 0; | |
| } | |
| else | |
| { | |
| ti.StateAddress = (ulong)val; | |
| var stateType = heap.GetObjectType(ti.StateAddress); |
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