sd: delete the global CacheConfiguration timer on shutdown

Crashes in SchedulerMutex::acquire if destroyed from __run_exit_handlers

Change-Id: Ie8bbb399183d118d92c94a40f55cc9c650baf742
Reviewed-on: https://gerrit.libreoffice.org/41629
Tested-by: Jenkins <ci@libreoffice.org>
Reviewed-by: Caolán McNamara <caolanm@redhat.com>
Tested-by: Caolán McNamara <caolanm@redhat.com>

3 files changed, 20 insertions, 6 deletions

diff --git a/sd/source/ui/slidesorter/cache/SlsCacheConfiguration.cxx b/sd/source/ui/slidesorter/cache/SlsCacheConfiguration.cxx
index 8bb01e4b7bbb..8d2be1ddcafb 100644
--- a/sd/source/ui/slidesorter/cache/SlsCacheConfiguration.cxx
+++ b/sd/source/ui/slidesorter/cache/SlsCacheConfiguration.cxx
@@ -41,7 +41,6 @@ namespace
 }
 
 std::weak_ptr<CacheConfiguration> CacheConfiguration::mpWeakInstance;
-Timer CacheConfiguration::maReleaseTimer;
 
 std::shared_ptr<CacheConfiguration> CacheConfiguration::Instance()
 {
@@ -58,11 +57,11 @@ std::shared_ptr<CacheConfiguration> CacheConfiguration::Instance()
             rInstancePtr.reset(new CacheConfiguration());
             mpWeakInstance = rInstancePtr;
             // Prepare to release this instance in the near future.
-            maReleaseTimer.SetInvokeHandler(
+            rInstancePtr->m_ReleaseTimer.SetInvokeHandler(
                 LINK(rInstancePtr.get(),CacheConfiguration,TimerCallback));
-            maReleaseTimer.SetTimeout(5000 /* 5s */);
-            maReleaseTimer.SetDebugName("sd::CacheConfiguration maReleaseTimer");
-            maReleaseTimer.Start();
+            rInstancePtr->m_ReleaseTimer.SetTimeout(5000 /* 5s */);
+            rInstancePtr->m_ReleaseTimer.SetDebugName("sd::CacheConfiguration maReleaseTimer");
+            rInstancePtr->m_ReleaseTimer.Start();
         }
     }
     return rInstancePtr;
@@ -131,6 +130,15 @@ IMPL_STATIC_LINK_NOARG(CacheConfiguration, TimerCallback, Timer *, void)
     CacheConfigSharedPtr &rInstancePtr = theInstance::get();
     // Release our reference to the instance.
     rInstancePtr.reset();
+    // note: if there are no other references to the instance, m_ReleaseTimer
+    // will be deleted now
+}
+
+void CacheConfiguration::Shutdown()
+{
+    CacheConfigSharedPtr &rInstancePtr = theInstance::get();
+    rInstancePtr.reset();
+    assert(mpWeakInstance.expired()); // ensure m_ReleaseTimer is destroyed
 }
 
 } } } // end of namespace ::sd::slidesorter::cache
diff --git a/sd/source/ui/slidesorter/cache/SlsCacheConfiguration.hxx b/sd/source/ui/slidesorter/cache/SlsCacheConfiguration.hxx
index 74a8097f02db..5d2a22cc1c51 100644
--- a/sd/source/ui/slidesorter/cache/SlsCacheConfiguration.hxx
+++ b/sd/source/ui/slidesorter/cache/SlsCacheConfiguration.hxx
@@ -39,6 +39,8 @@ public:
     */
     static std::shared_ptr<CacheConfiguration> Instance();
 
+    static void Shutdown();
+
     /** Look up the specified value in
         MultiPaneGUI/SlideSorter/PreviewCache.   When the specified value
         does not exist then an empty Any is returned.
@@ -50,7 +52,7 @@ private:
         this weak pointer to avoid creating a new instance.
     */
     static std::weak_ptr<CacheConfiguration> mpWeakInstance;
-    static Timer maReleaseTimer;
+    Timer m_ReleaseTimer;
     css::uno::Reference<css::container::XNameAccess> mxCacheNode;
 
     CacheConfiguration();
diff --git a/sd/source/ui/tools/SdGlobalResourceContainer.cxx b/sd/source/ui/tools/SdGlobalResourceContainer.cxx
index c1dc47bc917e..bcafcb52d701 100644
--- a/sd/source/ui/tools/SdGlobalResourceContainer.cxx
+++ b/sd/source/ui/tools/SdGlobalResourceContainer.cxx
@@ -19,6 +19,8 @@
 
 #include "tools/SdGlobalResourceContainer.hxx"
 
+#include "../cache/SlsCacheConfiguration.hxx"
+
 #include <comphelper/processfactory.hxx>
 #include <comphelper/unique_disposing_ptr.hxx>
 
@@ -194,6 +196,8 @@ SdGlobalResourceContainer::~SdGlobalResourceContainer()
         if (xComponent.is())
             xComponent->dispose();
     }
+
+    sd::slidesorter::cache::CacheConfiguration::Shutdown();
 }
 
 } // end of namespace sd