internal ExceptionTargetSite(StackTrace trace)
{
Debug.Assert(trace != null);
Debug.Assert(trace.FrameCount > 0);
var frame = trace.GetFrame(0);
Debug.Assert(frame != null);
var method = frame.GetMethod();
Debug.Assert(method != null);
AssemblyName = method.DeclaringType.Assembly.FullName;
TypeName = method.DeclaringType.FullName;
MethodName = method.Name;
ILOffset = frame.GetILOffset();
FileName = frame.GetFileName();
FileLineNumber = frame.GetFileLineNumber();
FileColumnNumber = frame.GetFileColumnNumber();
TargetSiteID = Hash.SHA1(GetHashableData());
}
/// <summary>
/// Logs all name/value pairs as a single collection using concurrent MERGE statements.
/// </summary>
/// <param name="conn"></param>
/// <param name="exCollectionID"></param>
/// <param name="coll"></param>
/// <returns></returns>
async Task LogCollection(SqlConnectionContext conn, SHA1Hash exCollectionID, IDictionary<string, string> coll)
{
// The exCollectionID should be pre-calculated by `CalcCollectionID`.
// Check if the exCollectionID exists already:
int? collectionCount = await conn.ExecReader(
@"SELECT COUNT(exCollectionID) FROM [dbo].[exCollectionKeyValue] WHERE [exCollectionID] = @exCollectionID",
prms =>
prms.AddInParamSHA1("@exCollectionID", exCollectionID),
async dr => await dr.ReadAsync() ? dr.GetInt32(0) : (int?)null
);
// Don't bother logging name-value pairs if the collection already exists:
if (!collectionCount.HasValue) return;
if (collectionCount.Value == coll.Count) return;
const int numTasksPerPair = 2;
// Create an array of tasks to wait upon:
var tasks = new Task[coll.Count * numTasksPerPair];
// Fill out the array of tasks with concurrent MERGE statements for each name/value pair:
using (var en = coll.Keys.GetEnumerator())
for (int i = 0; en.MoveNext(); ++i)
{
string name = en.Current;
string value = coll[name];
var exCollectionValueID = Hash.SHA1(value);
// Merge the Value record:
tasks[i * numTasksPerPair + 0] = conn.ExecNonQuery(
@"MERGE [dbo].[exCollectionValue] WITH (HOLDLOCK) AS target
USING (SELECT @exCollectionValueID) AS source (exCollectionValueID)
ON (target.exCollectionValueID = source.exCollectionValueID)
WHEN NOT MATCHED THEN
INSERT ([exCollectionValueID], [Value])
VALUES (@exCollectionValueID, @Value );",
prms =>
prms.AddInParamSHA1("@exCollectionValueID", exCollectionValueID)
.AddInParamSize("@Value", SqlDbType.VarChar, -1, value)
);
// Merge the Name-Value record:
tasks[i * numTasksPerPair + 1] = conn.ExecNonQuery(
@"MERGE [dbo].[exCollectionKeyValue] WITH (HOLDLOCK) AS target
USING (SELECT @exCollectionID, @Name, @exCollectionValueID) AS source (exCollectionID, Name, exCollectionValueID)
ON (target.exCollectionID = source.exCollectionID AND target.Name = source.Name AND target.exCollectionValueID = source.exCollectionValueID)
WHEN NOT MATCHED THEN
INSERT ([exCollectionID], [Name], [exCollectionValueID])
VALUES (@exCollectionID, @Name, @exCollectionValueID );",
prms =>
prms.AddInParamSHA1("@exCollectionID", exCollectionID)
.AddInParamSize("@Name", SqlDbType.VarChar, 96, name)
.AddInParamSHA1("@exCollectionValueID", exCollectionValueID)
);
}
// Our final task's completion depends on all the tasks created thus far:
await Task.WhenAll(tasks);
}
/// <summary>
/// Represents a thrown exception and some context.
/// </summary>
/// <param name="ex">The exception that was thrown.</param>
/// <param name="isHandled">Whether the exception is explicitly handled or not.</param>
/// <param name="correlationID">A unique identifier to tie two or more exception reports together.</param>
/// <param name="webHostingContext">The current web application hosting context, if applicable.</param>
/// <param name="capturedHttpContext">Captured values from the current HTTP context being handled, if applicable.</param>
public ExceptionWithCapturedContext(
Exception ex,
bool isHandled = false,
Guid? correlationID = null,
WebHostingContext webHostingContext = null,
CapturedHttpContext capturedHttpContext = null
)
{
// Check for a WrappedException to pull out custom Exception info:
WrappedException wex = ex as WrappedException;
Exception thrownEx = ex;
if (wex != null)
{
UserState = wex.UserState;
ex = wex.Wrapped;
}
Exception = ex;
IsHandled = isHandled;
CorrelationID = correlationID;
WebHostingContext = webHostingContext;
CapturedHttpContext = capturedHttpContext;
RealStackTrace = new StackTrace(thrownEx, true);
LoggedTimeUTC = DateTime.UtcNow;
ManagedThreadID = Thread.CurrentThread.ManagedThreadId;
SequenceNumber = Interlocked.Increment(ref runningSequenceNumber);
// Capture some details about the exception:
var exType = ex.GetType();
AssemblyName = exType.Assembly.FullName;
TypeName = exType.FullName;
// TODO(jsd): Sanitize embedded file paths in stack trace
StackTrace = thrownEx.StackTrace;
// SHA1 hash the `assemblyName:typeName:stackTrace[:targetSite]`:
string hashableData = String.Concat(AssemblyName, ":", TypeName, ":", StackTrace);
if (RealStackTrace != null && RealStackTrace.FrameCount > 0)
{
// Add in TargetSite data:
TargetSite = new ExceptionTargetSite(RealStackTrace);
hashableData += ":" + TargetSite.GetHashableData();
}
ExceptionID = Hash.SHA1(hashableData);
if (ex.InnerException != null)
InnerException = new ExceptionWithCapturedContext(ex.InnerException, isHandled, correlationID, webHostingContext, capturedHttpContext);
}
public HashedLogIdentifier(SHA1Hash sha1hash, int instanceID)
{
_sha1hash = sha1hash;
_instanceID = instanceID;
}
