Disable the pointer tracking feature in Qt 4.5.

The functionality is broken, since pointers can be released by a
QSharedPointer tracking a pointer of different type, which would leave
behind pointers in the hash.

The fix requires Qt 4.6 because of a new symbol being added.

2 files changed, 5 insertions, 29 deletions

diff --git a/src/corelib/tools/qsharedpointer.cpp b/src/corelib/tools/qsharedpointer.cpp
index ba62ce1..c9dccd3 100644
--- a/src/corelib/tools/qsharedpointer.cpp
+++ b/src/corelib/tools/qsharedpointer.cpp
@@ -833,42 +833,24 @@ namespace {
     };
 }
 
-Q_GLOBAL_STATIC(KnownPointers, knownPointers)
+//Q_GLOBAL_STATIC(KnownPointers, knownPointers)
 
 QT_BEGIN_NAMESPACE
 
 /*!
     \internal
 */
-void QtSharedPointer::internalSafetyCheckAdd(const volatile void *ptr)
+void QtSharedPointer::internalSafetyCheckAdd(const volatile void *)
 {
-    KnownPointers *const kp = knownPointers();
-    if (!kp)
-        return;                 // end-game: the application is being destroyed already
-
-    QMutexLocker lock(&kp->mutex);
-    void *actual = const_cast<void*>(ptr);
-    if (kp->values.contains(actual)) {
-        printBacktrace(knownPointers()->values.value(actual));
-        qFatal("QSharedPointerData: internal self-check failed: pointer %p was already tracked "
-               "by another QSharedPointerData object", actual);
-    }
-
-    kp->values.insert(actual, saveBacktrace());
+    // functionality is broken
+    // fix requires Qt 4.6
 }
 
 /*!
     \internal
 */
-void QtSharedPointer::internalSafetyCheckRemove(const volatile void *ptr)
+void QtSharedPointer::internalSafetyCheckRemove(const volatile void *)
 {
-    KnownPointers *const kp = knownPointers();
-    if (!kp)
-        return;                 // end-game: the application is being destroyed already
-
-    QMutexLocker lock(&kp->mutex);
-    void *actual = const_cast<void*>(ptr);
-    kp->values.remove(actual);
 }
 
 QT_END_NAMESPACE
diff --git a/src/corelib/tools/qsharedpointer_impl.h b/src/corelib/tools/qsharedpointer_impl.h
index 0471a1b..7aaed22 100644
--- a/src/corelib/tools/qsharedpointer_impl.h
+++ b/src/corelib/tools/qsharedpointer_impl.h
@@ -140,16 +140,10 @@ namespace QtSharedPointer {
 
         inline void internalConstruct(T *ptr)
         {
-#ifdef QT_SHAREDPOINTER_TRACK_POINTERS
-            if (ptr) internalSafetyCheckAdd(ptr);
-#endif
             value = ptr;
         }
         inline void internalDestroy()
         {
-#ifdef QT_SHAREDPOINTER_TRACK_POINTERS
-            if (value) internalSafetyCheckRemove(value);
-#endif
         }
 
 #if defined(Q_NO_TEMPLATE_FRIENDS)