Bug 729182 - Implement visual event tracer, dns instrumentation, r=sworkman

netwerk/dns/nsDNSService2.cpp

@@ -29,6 +29,7 @@
 
 #include "mozilla/FunctionTimer.h"
 #include "mozilla/Attributes.h"
+#include "mozilla/VisualEventTracer.h"
 
 using namespace mozilla;
 
@@ -278,6 +279,8 @@ nsDNSAsyncRequest::OnLookupComplete(nsHostResolver *resolver,
             status = NS_ERROR_OUT_OF_MEMORY;
     }
 
+    MOZ_EVENT_TRACER_DONE(this, "DNS");
+
     mListener->OnLookupComplete(this, rec, status);
     mListener = nsnull;
 
@@ -605,6 +608,9 @@ nsDNSService::AsyncResolve(const nsACString  &hostname,
         return NS_ERROR_OUT_OF_MEMORY;
     NS_ADDREF(*result = req);
 
+    MOZ_EVENT_TRACER_NAME_OBJECT(req, hostname.BeginReading());
+    MOZ_EVENT_TRACER_WAIT(req, "DNS");
+
     // addref for resolver; will be released when OnLookupComplete is called.
     NS_ADDREF(req);
     rv = res->ResolveHost(req->mHost.get(), flags, af, req);

netwerk/dns/nsHostResolver.cpp

@@ -37,6 +37,7 @@
 #include "mozilla/FunctionTimer.h"
 #include "mozilla/TimeStamp.h"
 #include "mozilla/Telemetry.h"
+#include "mozilla/VisualEventTracer.h"
 
 using namespace mozilla;
 
@@ -180,6 +181,8 @@ nsHostRecord::Create(const nsHostKey *key, nsHostRecord **result)
     void *place = ::operator new(size);
     *result = new(place) nsHostRecord(key);
     NS_ADDREF(*result);
+
+    MOZ_EVENT_TRACER_NAME_OBJECT(*result, key->host);
     return NS_OK;
 }
 
@@ -712,6 +715,8 @@ nsHostResolver::ConditionallyCreateThread(nsHostRecord *rec)
 nsresult
 nsHostResolver::IssueLookup(nsHostRecord *rec)
 {
+    MOZ_EVENT_TRACER_WAIT(rec, "nsHostResolver");
+
     nsresult rv = NS_OK;
     NS_ASSERTION(!rec->resolving, "record is already being resolved"); 
 
@@ -889,6 +894,8 @@ nsHostResolver::OnLookupComplete(nsHostRecord *rec, nsresult status, PRAddrInfo
         }
     }
 
+    MOZ_EVENT_TRACER_DONE(rec, "nsHostResolver");
+
     if (!PR_CLIST_IS_EMPTY(&cbs)) {
         PRCList *node = cbs.next;
         while (node != &cbs) {
@@ -972,6 +979,7 @@ nsHostResolver::ThreadFunc(void *arg)
 
         TimeStamp startTime = TimeStamp::Now();
 
+        MOZ_EVENT_TRACER_EXEC(rec, "nsHostResolver");
         ai = PR_GetAddrInfoByName(rec->host, rec->af, flags);
 #if defined(RES_RETRY_ON_FAILURE)
         if (!ai && rs.Reset())