Related fdo#52639: Do not destroy Implementations with mutex locked

Erasing from data_ member maps can destroy contained Implementations, which in
turn releases the UNO objects referenced from there, which in turn can cause
XComponents to dispose, which in turn can call arbitrary code, so must not be
done with rMutex locked.  Witness the backtrace at
<https://bugs.freedesktop.org/attachment.cgi?id=65142> linked from fdo#52639
(where this fix appears otherwise unrelated to that issue's main topic).

Change-Id: If55a3841b761ec1d9a0ef61fe54784426c4ee442

1 files changed, 56 insertions, 45 deletions

diff --git a/cppuhelper/source/defaultbootstrap.cxx b/cppuhelper/source/defaultbootstrap.cxx
index 151a36e6e7a0..c3bdba370d40 100644
--- a/cppuhelper/source/defaultbootstrap.cxx
+++ b/cppuhelper/source/defaultbootstrap.cxx
@@ -1346,7 +1346,7 @@ void ServiceManager::disposing(css::lang::EventObject const & Source)
 
 void ServiceManager::disposing() {
     std::vector< css::uno::Reference< css::lang::XComponent > > comps;
-    css::uno::Reference< css::lang::XEventListener > listener;
+    Data clear;
     {
         osl::MutexGuard g(rBHelper.rMutex);
         for (DynamicImplementations::const_iterator i(
@@ -1358,10 +1358,10 @@ void ServiceManager::disposing() {
                 comps.push_back(i->second->component);
             }
         }
-        data_.namedImplementations.clear();
-        data_.dynamicImplementations.clear();
-        data_.services.clear();
-        data_.singletons.clear();
+        data_.namedImplementations.swap(clear.namedImplementations);
+        data_.dynamicImplementations.swap(clear.dynamicImplementations);
+        data_.services.swap(clear.services);
+        data_.singletons.swap(clear.singletons);
     }
     for (std::vector<
              css::uno::Reference< css::lang::XComponent > >::const_iterator i(
@@ -1733,25 +1733,30 @@ void ServiceManager::removeRdbFiles(std::vector< rtl::OUString > const & uris) {
     // The underlying data structures make this function somewhat inefficient,
     // but the assumption is that it is rarely called (and that if it is called,
     // it is called with a uris vector of size one):
-    osl::MutexGuard g(rBHelper.rMutex);
-    for (std::vector< rtl::OUString >::const_iterator i(uris.begin());
-         i != uris.end(); ++i)
+    std::vector< boost::shared_ptr< Implementation > > clear;
     {
-        for (NamedImplementations::iterator j(
-                 data_.namedImplementations.begin());
-             j != data_.namedImplementations.end();)
+        osl::MutexGuard g(rBHelper.rMutex);
+        for (std::vector< rtl::OUString >::const_iterator i(uris.begin());
+             i != uris.end(); ++i)
         {
-            assert(j->second.get() != 0);
-            if (j->second->info->uri == *i) {
-                //TODO: The below leaves data_ in an inconsistent state upon
-                // exceptions:
-                removeFromImplementationMap(
-                    &data_.services, j->second->info->services, j->second);
-                removeFromImplementationMap(
-                    &data_.singletons, j->second->info->singletons, j->second);
-                data_.namedImplementations.erase(j++);
-            } else {
-                ++j;
+            for (NamedImplementations::iterator j(
+                     data_.namedImplementations.begin());
+                 j != data_.namedImplementations.end();)
+            {
+                assert(j->second.get() != 0);
+                if (j->second->info->uri == *i) {
+                    clear.push_back(j->second);
+                    //TODO: The below leaves data_ in an inconsistent state upon
+                    // exceptions:
+                    removeFromImplementationMap(
+                        &data_.services, j->second->info->services, j->second);
+                    removeFromImplementationMap(
+                        &data_.singletons, j->second->info->singletons,
+                        j->second);
+                    data_.namedImplementations.erase(j++);
+                } else {
+                    ++j;
+                }
             }
         }
     }
@@ -1763,6 +1768,7 @@ bool ServiceManager::removeLegacyFactory(
     bool removeListener)
 {
     assert(factoryInfo.is());
+    boost::shared_ptr< Implementation > clear;
     css::uno::Reference< css::lang::XComponent > comp;
     {
         osl::MutexGuard g(rBHelper.rMutex);
@@ -1772,6 +1778,7 @@ bool ServiceManager::removeLegacyFactory(
             return isDisposed();
         }
         assert(i->second.get() != 0);
+        clear = i->second;
         //TODO: The below leaves data_ in an inconsistent state upon exceptions:
         removeFromImplementationMap(
             &data_.services, i->second->info->services, i->second);
@@ -1794,32 +1801,36 @@ bool ServiceManager::removeLegacyFactory(
 void ServiceManager::removeImplementation(rtl::OUString name) {
     // The underlying data structures make this function somewhat inefficient,
     // but the assumption is that it is rarely called:
-    osl::MutexGuard g(rBHelper.rMutex);
-    if (isDisposed()) {
-        return;
-    }
-    NamedImplementations::iterator i(data_.namedImplementations.find(name));
-    if (i == data_.namedImplementations.end()) {
-        throw css::container::NoSuchElementException(
-            "Remove non-inserted implementation " + name,
-            static_cast< cppu::OWeakObject * >(this));
-    }
-    assert(i->second.get() != 0);
-    //TODO: The below leaves data_ in an inconsistent state upon exceptions:
-    removeFromImplementationMap(
-        &data_.services, i->second->info->services, i->second);
-    removeFromImplementationMap(
-        &data_.singletons, i->second->info->singletons, i->second);
-    for (DynamicImplementations::iterator j(
-             data_.dynamicImplementations.begin());
-         j != data_.dynamicImplementations.end(); ++j)
+    boost::shared_ptr< Implementation > clear;
     {
-        if (j->second == i->second) {
-            data_.dynamicImplementations.erase(j);
-            break;
+        osl::MutexGuard g(rBHelper.rMutex);
+        if (isDisposed()) {
+            return;
+        }
+        NamedImplementations::iterator i(data_.namedImplementations.find(name));
+        if (i == data_.namedImplementations.end()) {
+            throw css::container::NoSuchElementException(
+                "Remove non-inserted implementation " + name,
+                static_cast< cppu::OWeakObject * >(this));
+        }
+        assert(i->second.get() != 0);
+        clear = i->second;
+        //TODO: The below leaves data_ in an inconsistent state upon exceptions:
+        removeFromImplementationMap(
+            &data_.services, i->second->info->services, i->second);
+        removeFromImplementationMap(
+            &data_.singletons, i->second->info->singletons, i->second);
+        for (DynamicImplementations::iterator j(
+                 data_.dynamicImplementations.begin());
+             j != data_.dynamicImplementations.end(); ++j)
+        {
+            if (j->second == i->second) {
+                data_.dynamicImplementations.erase(j);
+                break;
+            }
         }
+        data_.namedImplementations.erase(i);
     }
-    data_.namedImplementations.erase(i);
 }
 
 boost::shared_ptr< Implementation > ServiceManager::findServiceImplementation(