private static void SerializeExceptionsForDump(Exception currentException, IntPtr exceptionCCWPtr, LowLevelList <byte[]> serializedExceptions)
{
const UInt32 NoInnerExceptionValue = 0xFFFFFFFF;
// Approximate upper size limit for the serialized exceptions (but we'll always serialize currentException)
// If we hit the limit, because we serialize in arbitrary order, there may be missing InnerExceptions or nested exceptions.
const int MaxBufferSize = 20000;
int nExceptions;
RuntimeImports.RhGetExceptionsForCurrentThread(null, out nExceptions);
Exception[] curThreadExceptions = new Exception[nExceptions];
RuntimeImports.RhGetExceptionsForCurrentThread(curThreadExceptions, out nExceptions);
LowLevelList <Exception> exceptions = new LowLevelList <Exception>(curThreadExceptions);
LowLevelList <Exception> nonThrownInnerExceptions = new LowLevelList <Exception>();
uint currentThreadId = Interop.mincore.GetCurrentThreadId();
// Reset nesting levels for exceptions on this thread that might not be currently in flight
foreach (ExceptionData exceptionData in s_exceptionDataTable.GetValues())
{
if (exceptionData.ExceptionMetadata.ThreadId == currentThreadId)
{
exceptionData.ExceptionMetadata.NestingLevel = -1;
}
}
// Find all inner exceptions, even if they're not currently being handled
for (int i = 0; i < exceptions.Count; i++)
{
if (exceptions[i].InnerException != null && !exceptions.Contains(exceptions[i].InnerException))
{
exceptions.Add(exceptions[i].InnerException);
nonThrownInnerExceptions.Add(exceptions[i].InnerException);
}
}
int currentNestingLevel = curThreadExceptions.Length - 1;
// Populate exception data for all exceptions interesting to this thread.
// Whether or not there was previously data for that object, it might have changed.
for (int i = 0; i < exceptions.Count; i++)
{
ExceptionData exceptionData = s_exceptionDataTable.GetOrCreateValue(exceptions[i]);
exceptionData.ExceptionMetadata.ExceptionId = (UInt32)System.Threading.Interlocked.Increment(ref s_currentExceptionId);
if (exceptionData.ExceptionMetadata.ExceptionId == NoInnerExceptionValue)
{
exceptionData.ExceptionMetadata.ExceptionId = (UInt32)System.Threading.Interlocked.Increment(ref s_currentExceptionId);
}
exceptionData.ExceptionMetadata.ThreadId = currentThreadId;
// Only include nesting information for exceptions that were thrown on this thread
if (!nonThrownInnerExceptions.Contains(exceptions[i]))
{
exceptionData.ExceptionMetadata.NestingLevel = currentNestingLevel;
currentNestingLevel--;
}
else
{
exceptionData.ExceptionMetadata.NestingLevel = -1;
}
// Only match the CCW pointer up to the current exception
if (Object.ReferenceEquals(exceptions[i], currentException))
{
exceptionData.ExceptionMetadata.ExceptionCCWPtr = exceptionCCWPtr;
}
byte[] serializedEx = exceptions[i].SerializeForDump();
exceptionData.SerializedExceptionData = serializedEx;
}
// Populate inner exception ids now that we have all of them in the table
for (int i = 0; i < exceptions.Count; i++)
{
ExceptionData exceptionData;
if (!s_exceptionDataTable.TryGetValue(exceptions[i], out exceptionData))
{
// This shouldn't happen, but we can't meaningfully throw here
continue;
}
if (exceptions[i].InnerException != null)
{
ExceptionData innerExceptionData;
if (s_exceptionDataTable.TryGetValue(exceptions[i].InnerException, out innerExceptionData))
{
exceptionData.ExceptionMetadata.InnerExceptionId = innerExceptionData.ExceptionMetadata.ExceptionId;
}
}
else
{
exceptionData.ExceptionMetadata.InnerExceptionId = NoInnerExceptionValue;
}
}
int totalSerializedExceptionSize = 0;
// Make sure we include the current exception, regardless of buffer size
ExceptionData currentExceptionData = null;
if (s_exceptionDataTable.TryGetValue(currentException, out currentExceptionData))
{
byte[] serializedExceptionData = currentExceptionData.Serialize();
serializedExceptions.Add(serializedExceptionData);
totalSerializedExceptionSize = serializedExceptionData.Length;
}
checked
{
foreach (ExceptionData exceptionData in s_exceptionDataTable.GetValues())
{
// Already serialized currentException
if (currentExceptionData != null && exceptionData.ExceptionMetadata.ExceptionId == currentExceptionData.ExceptionMetadata.ExceptionId)
{
continue;
}
byte[] serializedExceptionData = exceptionData.Serialize();
if (totalSerializedExceptionSize + serializedExceptionData.Length >= MaxBufferSize)
{
break;
}
serializedExceptions.Add(serializedExceptionData);
totalSerializedExceptionSize += serializedExceptionData.Length;
}
}
}