Merge remote branch 'origin/4.7' into qt-master-from-4.7

Conflicts:
	qmake/generators/win32/msbuild_objectmodel.cpp
	src/declarative/qml/qdeclarativexmlhttprequest.cpp
	src/opengl/opengl.pro
	src/opengl/qgl_p.h
	src/plugins/bearer/connman/qconnmanservice_linux.cpp
	tests/auto/qpainter/tst_qpainter.cpp
	tools/assistant/tools/assistant/helpviewer_qwv.h
	tools/assistant/tools/assistant/openpageswidget.h

1 files changed, 28 insertions, 19 deletions

diff --git a/src/corelib/io/qprocess_symbian.cpp b/src/corelib/io/qprocess_symbian.cpp
index af657b2..003e781 100644
--- a/src/corelib/io/qprocess_symbian.cpp
+++ b/src/corelib/io/qprocess_symbian.cpp
@@ -375,10 +375,9 @@ QProcessActive::QProcessActive()
     // Nothing to do
 }
 
-// Called from ProcessManagerThread
+// Called from main thread
 QProcessActive::~QProcessActive()
 {
-    Cancel();
     process = NULL;
     pproc = NULL;
 }
@@ -482,10 +481,9 @@ QProcessManagerMediator::QProcessManagerMediator()
     // Nothing to do
 }
 
-// Called from ProcessManagerThread
+// Called from main thread
 QProcessManagerMediator::~QProcessManagerMediator()
 {
-    Cancel();
     processManagerThread.Close();
     currentCommand = ENoCommand;
     currentObserver = NULL;
@@ -648,25 +646,36 @@ QProcessManager::QProcessManager()
 QProcessManager::~QProcessManager()
 {
     QPROCESS_DEBUG_PRINT("QProcessManager::~QProcessManager()");
-    // Cancel death listening for all child processes
-    if (mediator) {
-        QMap<int, QProcessActive *>::Iterator it = children.begin();
-        while (it != children.end()) {
-            // Remove all monitors
-            QProcessActive *active = it.value();
-            mediator->remove(active);
-
-            QPROCESS_DEBUG_PRINT("QProcessManager::~QProcessManager() removed listening for a process");
-            ++it;
+
+    // Check if manager thread is still alive. If this destructor is ran as part of global
+    // static cleanup, manager thread will most likely be terminated by kernel at this point,
+    // so trying to delete QProcessActives and QProcessMediators will panic as they
+    // will still be active. They can also no longer be canceled as the thread is already gone.
+    // In case manager thread has already died, we simply do nothing and let the deletion of
+    // the main heap at process exit take care of stray objects.
+
+    if (managerThread.Handle() && managerThread.ExitType() == EExitPending) {
+        // Cancel death listening for all child processes
+        if (mediator) {
+            QMap<int, QProcessActive *>::Iterator it = children.begin();
+            while (it != children.end()) {
+                // Remove all monitors
+                QProcessActive *active = it.value();
+                mediator->remove(active);
+
+                QPROCESS_DEBUG_PRINT("QProcessManager::~QProcessManager() removed listening for a process");
+                ++it;
+            }
+
+            // Terminate process manager thread.
+            mediator->terminate();
+            delete mediator;
         }
 
-        // Terminate process manager thread.
-        mediator->terminate();
-        delete mediator;
+        qDeleteAll(children.values());
+        children.clear();
     }
 
-    qDeleteAll(children.values());
-    children.clear();
     managerThread.Close();
     managerMutex.Close();
 }