Finding the root cause from WER:
From wer file info, I got 34a5.
1. !token2ee mscorlib_ni 060034a5 – bcoz “06xxxxxx” is standard. – mscorlib is the guy who failed.
O/P:
!token2ee mscorlib 060034a5
0:012> !token2ee mscorlib_ni 060034a5
Module: 000007fef8e91000 (mscorlib.dll)
Token: 0x00000000060034a5
MethodDesc: 000007fef8f0fd00
Name: System.IO.__Error.WinIOError(Int32, System.String)
JITTED Code Address: 000007fef9163fa0
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2. !dumpil 000007fef8f0fd00 – Go to method and also go to b2 since this is the offset
O/P:
ilAddr = 000007fef96dba58
IL_0000: ldarg.0
IL_0001: ldc.i4.s 123
IL_0003: beq.s IL_000f
IL_0005: ldarg.0
IL_0006: ldc.i4 161
IL_000b: ceq
IL_000d: br.s IL_0010
IL_000f: ldc.i4.1
IL_0010: stloc.0
IL_0011: ldarg.1
IL_0012: ldloc.0
IL_0013: call System.IO.__Error::GetDisplayablePath
IL_0018: stloc.1
IL_0019: ldarg.0
IL_001a: stloc.2
IL_001b: ldloc.2
IL_001c: ldc.i4.s 80
IL_001e: bgt.s IL_005f
IL_0020: ldloc.2
IL_0021: ldc.i4.s 15
IL_0023: bgt.s IL_004a
IL_0025: ldloc.2
IL_0026: ldc.i4.2
IL_0027: sub
IL_0028: switch (IL_009a, IL_00d9, IL_025b, IL_011a)
IL_003d: ldloc.2
IL_003e: ldc.i4.s 15
IL_0040: beq IL_019c
IL_0045: br IL_025b
IL_004a: ldloc.2
IL_004b: ldc.i4.s 32
IL_004d: beq IL_01d8
IL_0052: ldloc.2
IL_0053: ldc.i4.s 80
IL_0055: beq IL_021d
IL_005a: br IL_025b
IL_005f: ldloc.2
IL_0060: ldc.i4 183
IL_0065: bgt.s IL_007f
IL_0067: ldloc.2
IL_0068: ldc.i4.s 87
IL_006a: beq IL_01c5
IL_006f: ldloc.2
IL_0070: ldc.i4 183
IL_0075: beq IL_015b
IL_007a: br IL_025b
IL_007f: ldloc.2
IL_0080: ldc.i4 206
IL_0085: beq IL_018c
IL_008a: ldloc.2
IL_008b: ldc.i4 995
IL_0090: beq IL_0255
IL_0095: br IL_025b
IL_009a: ldloc.1
IL_009b: callvirt System.String::get_Length
IL_00a0: brtrue.s IL_00b2
IL_00a2: ldstr "IO.FileNotFound"
IL_00a7: call System.Environment::GetResourceString
IL_00ac: newobj System.IO.FileNotFoundException::.ctor
IL_00b1: throw
IL_00b2: call System.Globalization.CultureInfo::get_CurrentCulture
IL_00b7: ldstr "IO.FileNotFound_FileName"
IL_00bc: call System.Environment::GetResourceString
IL_00c1: ldc.i4.1
IL_00c2: newarr System.Object
IL_00c7: stloc.3
IL_00c8: ldloc.3
IL_00c9: ldc.i4.0
IL_00ca: ldloc.1
IL_00cb: stelem.ref
IL_00cc: ldloc.3
IL_00cd: call System.String::Format
IL_00d2: ldloc.1
IL_00d3: newobj System.IO.FileNotFoundException::.ctor
IL_00d8: throw
IL_00d9: ldloc.1
IL_00da: callvirt System.String::get_Length
IL_00df: brtrue.s IL_00f1
IL_00e1: ldstr "IO.PathNotFound_NoPathName"
IL_00e6: call System.Environment::GetResourceString
IL_00eb: newobj System.IO.DirectoryNotFoundException::.ctor
IL_00f0: throw
IL_00f1: call System.Globalization.CultureInfo::get_CurrentCulture
IL_00f6: ldstr "IO.PathNotFound_Path"
IL_00fb: call System.Environment::GetResourceString
IL_0100: ldc.i4.1
IL_0101: newarr System.Object
IL_0106: stloc.s VAR OR ARG 4
IL_0108: ldloc.s VAR OR ARG 4
IL_010a: ldc.i4.0
IL_010b: ldloc.1
IL_010c: stelem.ref
IL_010d: ldloc.s VAR OR ARG 4
IL_010f: call System.String::Format
IL_0114: newobj System.IO.DirectoryNotFoundException::.ctor
IL_0119: throw
IL_011a: ldloc.1
IL_011b: callvirt System.String::get_Length
IL_0120: brtrue.s IL_0132
IL_0122: ldstr "UnauthorizedAccess_IODenied_NoPathName"
IL_0127: call System.Environment::GetResourceString
IL_012c: newobj System.UnauthorizedAccessException::.ctor
IL_0131: throw
IL_0132: call System.Globalization.CultureInfo::get_CurrentCulture
IL_0137: ldstr "UnauthorizedAccess_IODenied_Path"
IL_013c: call System.Environment::GetResourceString
IL_0141: ldc.i4.1
IL_0142: newarr System.Object
IL_0147: stloc.s VAR OR ARG 5
IL_0149: ldloc.s VAR OR ARG 5
IL_014b: ldc.i4.0
IL_014c: ldloc.1
IL_014d: stelem.ref
IL_014e: ldloc.s VAR OR ARG 5
IL_0150: call System.String::Format
IL_0155: newobj System.UnauthorizedAccessException::.ctor
IL_015a: throw
IL_015b: ldloc.1
IL_015c: callvirt System.String::get_Length
IL_0161: brfalse IL_025b
IL_0166: ldstr "IO.IO_AlreadyExists_Name"
IL_016b: ldc.i4.1
IL_016c: newarr System.Object
IL_0171: stloc.s VAR OR ARG 6
IL_0173: ldloc.s VAR OR ARG 6
IL_0175: ldc.i4.0
IL_0176: ldloc.1
IL_0177: stelem.ref
IL_0178: ldloc.s VAR OR ARG 6
IL_017a: call System.Environment::GetResourceString
IL_017f: ldarg.0
IL_0180: call Microsoft.Win32.Win32Native::MakeHRFromErrorCode
IL_0185: ldarg.1
IL_0186: newobj System.IO.IOException::.ctor
IL_018b: throw
IL_018c: ldstr "IO.PathTooLong"
IL_0191: call System.Environment::GetResourceString
IL_0196: newobj System.IO.PathTooLongException::.ctor
IL_019b: throw
IL_019c: call System.Globalization.CultureInfo::get_CurrentCulture
IL_01a1: ldstr "IO.DriveNotFound_Drive"
IL_01a6: call System.Environment::GetResourceString
IL_01ab: ldc.i4.1
IL_01ac: newarr System.Object
IL_01b1: stloc.s VAR OR ARG 7
IL_01b3: ldloc.s VAR OR ARG 7
IL_01b5: ldc.i4.0
IL_01b6: ldloc.1
IL_01b7: stelem.ref
IL_01b8: ldloc.s VAR OR ARG 7
IL_01ba: call System.String::Format
IL_01bf: newobj System.IO.DriveNotFoundException::.ctor
IL_01c4: throw
IL_01c5: ldarg.0
IL_01c6: call Microsoft.Win32.Win32Native::GetMessage
IL_01cb: ldarg.0
IL_01cc: call Microsoft.Win32.Win32Native::MakeHRFromErrorCode
IL_01d1: ldarg.1
IL_01d2: newobj System.IO.IOException::.ctor
IL_01d7: throw
IL_01d8: ldloc.1
IL_01d9: callvirt System.String::get_Length
IL_01de: brtrue.s IL_01f7
IL_01e0: ldstr "IO.IO_SharingViolation_NoFileName"
IL_01e5: call System.Environment::GetResourceString
IL_01ea: ldarg.0
IL_01eb: call Microsoft.Win32.Win32Native::MakeHRFromErrorCode
IL_01f0: ldarg.1
IL_01f1: newobj System.IO.IOException::.ctor
IL_01f6: throw
IL_01f7: ldstr "IO.IO_SharingViolation_File"
IL_01fc: ldc.i4.1
IL_01fd: newarr System.Object
IL_0202: stloc.s VAR OR ARG 8
IL_0204: ldloc.s VAR OR ARG 8
IL_0206: ldc.i4.0
IL_0207: ldloc.1
IL_0208: stelem.ref
IL_0209: ldloc.s VAR OR ARG 8
IL_020b: call System.Environment::GetResourceString
IL_0210: ldarg.0
IL_0211: call Microsoft.Win32.Win32Native::MakeHRFromErrorCode
IL_0216: ldarg.1
IL_0217: newobj System.IO.IOException::.ctor
IL_021c: throw
IL_021d: ldloc.1
IL_021e: callvirt System.String::get_Length
IL_0223: brfalse.s IL_025b
IL_0225: call System.Globalization.CultureInfo::get_CurrentCulture
IL_022a: ldstr "IO.IO_FileExists_Name"
IL_022f: call System.Environment::GetResourceString
IL_0234: ldc.i4.1
IL_0235: newarr System.Object
IL_023a: stloc.s VAR OR ARG 9
IL_023c: ldloc.s VAR OR ARG 9
IL_023e: ldc.i4.0
IL_023f: ldloc.1
IL_0240: stelem.ref
IL_0241: ldloc.s VAR OR ARG 9
IL_0243: call System.String::Format
IL_0248: ldarg.0
IL_0249: call Microsoft.Win32.Win32Native::MakeHRFromErrorCode
IL_024e: ldarg.1
IL_024f: newobj System.IO.IOException::.ctor
IL_0254: throw
IL_0255: newobj System.OperationCanceledException::.ctor
IL_025a: throw
IL_025b: ldarg.0
IL_025c: call Microsoft.Win32.Win32Native::GetMessage
IL_0261: ldarg.0
IL_0262: call Microsoft.Win32.Win32Native::MakeHRFromErrorCode
IL_0267: ldarg.1
IL_0268: newobj System.IO.IOException::.ctor
IL_026d: throw
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I used the below links to find this out.
2. http://blogs.msdn.com/b/oanapl/archive/2009/01/30/windows-error-reporting-wer-and-clr-integration.aspx - actual link which helped me
3. http://blogs.msdn.com/b/oanapl/archive/2009/01/28/windows-error-reporting-wer-for-developers.aspx
