More diagnostics for bug 626768 - It seems likely that creating a new XPCJSRuntime is failing, but we don't know why or when. Abort in the most obvious failure location to help diagnose the problem. r=bent a=myself

js/src/xpconnect/src/nsXPConnect.cpp

@@ -167,22 +167,19 @@ nsXPConnect::GetXPConnect()
         if(!gSelf)
             return nsnull;
 
-        if(!gSelf->mRuntime ||
-           !gSelf->mInterfaceInfoManager)
-        {
-            // ctor failed to create an acceptable instance
-            delete gSelf;
-            gSelf = nsnull;
+        if (!gSelf->mRuntime) {
+            NS_RUNTIMEABORT("Couldn't create XPCJSRuntime.");
         }
-        else
-        {
-            // Initial extra ref to keep the singleton alive
-            // balanced by explicit call to ReleaseXPConnectSingleton()
-            NS_ADDREF(gSelf);
-            if (NS_FAILED(NS_SetGlobalThreadObserver(gSelf))) {
-                NS_RELEASE(gSelf);
-                // Fall through to returning null
-            }
+        if (!gSelf->mInterfaceInfoManager) {
+            NS_RUNTIMEABORT("Couldn't get global interface info manager.");
+        }
+
+        // Initial extra ref to keep the singleton alive
+        // balanced by explicit call to ReleaseXPConnectSingleton()
+        NS_ADDREF(gSelf);
+        if (NS_FAILED(NS_SetGlobalThreadObserver(gSelf))) {
+            NS_RELEASE(gSelf);
+            // Fall through to returning null
         }
     }
     return gSelf;

js/src/xpconnect/src/xpcjsruntime.cpp

@@ -1354,7 +1354,9 @@ XPCJSRuntime::XPCJSRuntime(nsXPConnect* aXPConnect)
     mStrIDs[0] = JSID_VOID;
 
     mJSRuntime = JS_NewRuntime(32L * 1024L * 1024L); // pref ?
-    if(mJSRuntime)
+    if (!mJSRuntime)
+        NS_RUNTIMEABORT("JS_NewRuntime failed.");
+
     {
         // Unconstrain the runtime's threshold on nominal heap size, to avoid
         // triggering GC too often if operating continuously near an arbitrary
@@ -1371,6 +1373,8 @@ XPCJSRuntime::XPCJSRuntime(nsXPConnect* aXPConnect)
                                   xpc::WrapperFactory::Rewrap,
                                   xpc::WrapperFactory::PrepareForWrapping);
         mWatchdogWakeup = JS_NEW_CONDVAR(mJSRuntime->gcLock);
+        if (!mWatchdogWakeup)
+            NS_RUNTIMEABORT("JS_NEW_CONDVAR failed.");
 
         mJSRuntime->setActivityCallback(ActivityCallback, this);
 
@@ -1400,6 +1404,8 @@ XPCJSRuntime::XPCJSRuntime(nsXPConnect* aXPConnect)
         mWatchdogThread = PR_CreateThread(PR_USER_THREAD, WatchdogMain, this,
                                           PR_PRIORITY_NORMAL, PR_LOCAL_THREAD,
                                           PR_UNJOINABLE_THREAD, 0);
+        if (!mWatchdogThread)
+            NS_RUNTIMEABORT("PR_CreateThread failed!");
     }
 }
 
@@ -1427,6 +1433,9 @@ XPCJSRuntime::newXPCJSRuntime(nsXPConnect* aXPConnect)
     {
         return self;
     }
+
+    NS_RUNTIMEABORT("new XPCJSRuntime failed to initialize.");
+
     delete self;
     return nsnull;
 }