Bug 1769624 - Verify shutdown status before asserting r=nika

Differential Revision: https://phabricator.services.mozilla.com/D146567

ipc/glue/UtilityProcessManager.cpp

@@ -126,6 +126,7 @@ RefPtr<GenericNonExclusivePromise> UtilityProcessManager::LaunchProcess(
   MOZ_ASSERT(NS_IsMainThread());
 
   if (IsShutdown()) {
+    NS_WARNING("Reject early LaunchProcess() for Shutdown");
     return GenericNonExclusivePromise::CreateAndReject(NS_ERROR_NOT_AVAILABLE,
                                                        __func__);
   }
@@ -133,6 +134,7 @@ RefPtr<GenericNonExclusivePromise> UtilityProcessManager::LaunchProcess(
   RefPtr<ProcessFields> p = GetProcess(aSandbox);
   if (p && p->mNumProcessAttempts) {
     // We failed to start the Utility process earlier, abort now.
+    NS_WARNING("Reject LaunchProcess() for earlier mNumProcessAttempts");
     return GenericNonExclusivePromise::CreateAndReject(NS_ERROR_NOT_AVAILABLE,
                                                        __func__);
   }
@@ -156,6 +158,7 @@ RefPtr<GenericNonExclusivePromise> UtilityProcessManager::LaunchProcess(
   if (!p->mProcess->Launch(extraArgs)) {
     p->mNumProcessAttempts++;
     DestroyProcess(aSandbox);
+    NS_WARNING("Reject LaunchProcess() for mNumProcessAttempts++");
     return GenericNonExclusivePromise::CreateAndReject(NS_ERROR_NOT_AVAILABLE,
                                                        __func__);
   }
@@ -165,11 +168,13 @@ RefPtr<GenericNonExclusivePromise> UtilityProcessManager::LaunchProcess(
       GetMainThreadSerialEventTarget(), __func__,
       [self, p, aSandbox](bool) {
         if (self->IsShutdown()) {
+          NS_WARNING("Reject LaunchProcess() after LaunchPromise() for Shutdown");
           return GenericNonExclusivePromise::CreateAndReject(
               NS_ERROR_NOT_AVAILABLE, __func__);
         }
 
         if (self->IsProcessDestroyed(aSandbox)) {
+          NS_WARNING("Reject LaunchProcess() after LaunchPromise() for destroyed process");
           return GenericNonExclusivePromise::CreateAndReject(
               NS_ERROR_NOT_AVAILABLE, __func__);
         }
@@ -194,6 +199,7 @@ RefPtr<GenericNonExclusivePromise> UtilityProcessManager::LaunchProcess(
           p->mNumProcessAttempts++;
           self->DestroyProcess(aSandbox);
         }
+        NS_WARNING("Reject LaunchProcess() for LaunchPromise() rejection");
         return GenericNonExclusivePromise::CreateAndReject(aError, __func__);
       });
 
@@ -244,8 +250,11 @@ RefPtr<GenericNonExclusivePromise> UtilityProcessManager::StartUtility(
 
         return GenericNonExclusivePromise::CreateAndResolve(true, __func__);
       },
-      [](nsresult aError) {
+      [self](nsresult aError) {
+        if (!self->IsShutdown()) {
           MOZ_ASSERT_UNREACHABLE("Failure when starting actor");
+        }
+        NS_WARNING("Reject StartUtility() for LaunchProcess() rejection");
         return GenericNonExclusivePromise::CreateAndReject(aError, __func__);
       });
 }
@@ -289,9 +298,12 @@ UtilityProcessManager::StartAudioDecoding(base::ProcessId aOtherProcess) {
             return AudioDecodingPromise::CreateAndResolve(std::move(childPipe),
                                                           __func__);
           },
-          [](nsresult aError) {
+          [self](nsresult aError) {
+            if (!self->IsShutdown()) {
               MOZ_ASSERT_UNREACHABLE(
                   "PUtilityAudioDecoder: failure when starting actor");
+            }
+            NS_WARNING("Reject StartAudioDecoding() for StartUtility() rejection");
             return AudioDecodingPromise::CreateAndReject(aError, __func__);
           });
 }