Bug 1504557 - Remove the XPCOM registration for nsErrorService r=froydnj

Differential Revision: https://phabricator.services.mozilla.com/D10848

--HG--
extra : moz-landing-system : lando

dom/xslt/xslt/txMozillaXSLTProcessor.cpp

@@ -26,7 +26,7 @@
 #include "nsThreadUtils.h"
 #include "jsapi.h"
 #include "txExprParser.h"
-#include "nsIErrorService.h"
+#include "nsErrorService.h"
 #include "nsIScriptSecurityManager.h"
 #include "nsJSUtils.h"
 #include "nsIXPConnect.h"
@@ -1286,12 +1286,9 @@ txMozillaXSLTProcessor::Startup()
         return NS_ERROR_OUT_OF_MEMORY;
     }
 
-    nsCOMPtr<nsIErrorService> errorService =
-        do_GetService(NS_ERRORSERVICE_CONTRACTID);
-    if (errorService) {
-        errorService->RegisterErrorStringBundle(NS_ERROR_MODULE_XSLT,
-                                                XSLT_MSGS_URL);
-    }
+    nsCOMPtr<nsIErrorService> errorService = nsErrorService::GetOrCreate();
+    errorService->RegisterErrorStringBundle(NS_ERROR_MODULE_XSLT,
+                                            XSLT_MSGS_URL);
 
     return NS_OK;
 }
@@ -1302,11 +1299,8 @@ txMozillaXSLTProcessor::Shutdown()
 {
     txXSLTProcessor::shutdown();
 
-    nsCOMPtr<nsIErrorService> errorService =
-        do_GetService(NS_ERRORSERVICE_CONTRACTID);
-    if (errorService) {
-        errorService->UnregisterErrorStringBundle(NS_ERROR_MODULE_XSLT);
-    }
+    nsCOMPtr<nsIErrorService> errorService = nsErrorService::GetOrCreate();
+    errorService->UnregisterErrorStringBundle(NS_ERROR_MODULE_XSLT);
 }
 
 /* static*/

intl/strres/nsStringBundle.cpp

@@ -21,7 +21,7 @@
 #include "nsIObserverService.h"
 #include "nsCOMArray.h"
 #include "nsTextFormatter.h"
-#include "nsIErrorService.h"
+#include "nsErrorService.h"
 #include "nsICategoryManager.h"
 #include "nsContentUtils.h"
 #include "nsPersistentProperties.h"
@@ -49,8 +49,6 @@ using mozilla::dom::ipc::SharedStringMap;
 using mozilla::dom::ipc::SharedStringMapBuilder;
 using mozilla::ipc::FileDescriptor;
 
-static NS_DEFINE_CID(kErrorServiceCID, NS_ERRORSERVICE_CID);
-
 /**
  * A set of string bundle URLs which are loaded by content processes, and
  * should be allocated in a shared memory region, and then sent to content
@@ -763,8 +761,8 @@ struct bundleCacheEntry_t final : public LinkedListElement<bundleCacheEntry_t> {
 nsStringBundleService::nsStringBundleService() :
   mBundleMap(MAX_CACHED_BUNDLES)
 {
-  mErrorService = do_GetService(kErrorServiceCID);
-  NS_ASSERTION(mErrorService, "Couldn't get error service");
+  mErrorService = nsErrorService::GetOrCreate();
+  MOZ_ALWAYS_TRUE(mErrorService);
 }
 
 NS_IMPL_ISUPPORTS(nsStringBundleService,

netwerk/base/nsIOService.cpp

@@ -12,7 +12,7 @@
 #include "nscore.h"
 #include "nsIURI.h"
 #include "prprf.h"
-#include "nsIErrorService.h"
+#include "nsErrorService.h"
 #include "netCore.h"
 #include "nsIObserverService.h"
 #include "nsIPrefService.h"
@@ -216,12 +216,9 @@ nsresult
 nsIOService::Init()
 {
     // XXX hack until xpidl supports error info directly (bug 13423)
-    nsCOMPtr<nsIErrorService> errorService = do_GetService(NS_ERRORSERVICE_CONTRACTID);
-    if (errorService) {
-        errorService->RegisterErrorStringBundle(NS_ERROR_MODULE_NETWORK, NECKO_MSGS_URL);
-    }
-    else
-        NS_WARNING("failed to get error service");
+    nsCOMPtr<nsIErrorService> errorService = nsErrorService::GetOrCreate();
+    MOZ_ALWAYS_TRUE(errorService);
+    errorService->RegisterErrorStringBundle(NS_ERROR_MODULE_NETWORK, NECKO_MSGS_URL);
 
     InitializeCaptivePortalService();
 

xpcom/base/moz.build

@@ -67,6 +67,7 @@ EXPORTS += [
     'nsDebugImpl.h',
     'nsDumpUtils.h',
     'nsError.h',
+    'nsErrorService.h',
     'nsGZFileWriter.h',
     'nsIClassInfoImpl.h',
     'nsID.h',

xpcom/base/nsErrorService.cpp

@@ -7,18 +7,31 @@
 #include "nsErrorService.h"
 #include "nsCRTGlue.h"
 #include "nsAutoPtr.h"
+#include "mozilla/StaticPtr.h"
+#include "mozilla/ClearOnShutdown.h"
+
+namespace {
+
+mozilla::StaticRefPtr<nsErrorService> gSingleton;
+
+}
 
 NS_IMPL_ISUPPORTS(nsErrorService, nsIErrorService)
 
-nsresult
-nsErrorService::Create(nsISupports* aOuter, const nsIID& aIID,
-                       void** aInstancePtr)
+// static
+already_AddRefed<nsIErrorService>
+nsErrorService::GetOrCreate()
 {
-  if (NS_WARN_IF(aOuter)) {
-    return NS_ERROR_NO_AGGREGATION;
+  RefPtr<nsErrorService> svc;
+  if (gSingleton) {
+    svc = gSingleton;
+  } else {
+    gSingleton = new nsErrorService();
+    mozilla::ClearOnShutdown(&gSingleton);
+    svc = gSingleton;
   }
-  RefPtr<nsErrorService> serv = new nsErrorService();
-  return serv->QueryInterface(aIID, aInstancePtr);
+
+  return svc.forget();
 }
 
 NS_IMETHODIMP

xpcom/base/nsErrorService.h

@@ -19,17 +19,11 @@ public:
   NS_DECL_ISUPPORTS
   NS_DECL_NSIERRORSERVICE
 
-  nsErrorService()
-  {
-  }
-
-  static nsresult
-  Create(nsISupports* aOuter, const nsIID& aIID, void** aInstancePtr);
+  static already_AddRefed<nsIErrorService> GetOrCreate();
 
 private:
-  ~nsErrorService()
-  {
-  }
+  nsErrorService() = default;
+  ~nsErrorService() = default;
 
   nsClassHashtable<nsUint32HashKey, nsCString> mErrorStringBundleURLMap;
 };

xpcom/base/nsIErrorService.idl

@@ -32,18 +32,3 @@ interface nsIErrorService : nsISupports
      */
     string getErrorStringBundle(in short errorModule);
 };
-
-%{C++
-
-// The global nsIErrorService:
-#define NS_ERRORSERVICE_NAME   "Error Service" 
-#define NS_ERRORSERVICE_CONTRACTID "@mozilla.org/xpcom/error-service;1"
-#define NS_ERRORSERVICE_CID                          \
-{ /* 744afd5e-5f8c-11d4-9877-00c04fa0cf4a */         \
-    0x744afd5e,                                      \
-    0x5f8c,                                          \
-    0x11d4,                                          \
-    {0x98, 0x77, 0x00, 0xc0, 0x4f, 0xa0, 0xcf, 0x4a} \
-}
-
-%}

xpcom/build/XPCOMInit.cpp

@@ -37,7 +37,6 @@
 #include "nsMemoryImpl.h"
 #include "nsDebugImpl.h"
 #include "nsTraceRefcnt.h"
-#include "nsErrorService.h"
 
 #include "nsArray.h"
 #include "nsINIParserImpl.h"

xpcom/build/XPCOMModule.inc

@@ -1,6 +1,5 @@
     COMPONENT_M(MEMORY, nsMemoryImpl::Create, Module::ALLOW_IN_GPU_PROCESS)
     COMPONENT_M(DEBUG,  nsDebugImpl::Create, Module::ALLOW_IN_GPU_PROCESS)
-    COMPONENT(ERRORSERVICE, nsErrorService::Create)
 
     COMPONENT_M(CATEGORYMANAGER, nsCategoryManager::Create, Module::ALLOW_IN_GPU_PROCESS)