fix memory leak in wxScreenDC, fixes #13249

[wxWidgets.git] / src / common / appbase.cpp

diff --git a/src/common/appbase.cpp b/src/common/appbase.cpp
index cf9ad8b1af2b39fd343d633c5e6bcce0dde4878b..194d0793acf80d32df46492c2bd49899f04e35e0 100644 (file)
--- a/src/common/appbase.cpp
+++ b/src/common/appbase.cpp
@@ -6,7 +6,7 @@
 // Created:     19.06.2003 (extracted from common/appcmn.cpp)
 // RCS-ID:      $Id$
 // Copyright:   (c) 2003 Vadim Zeitlin <vadim@wxwindows.org>
-// License:     wxWindows license
+// Licence:     wxWindows licence
 ///////////////////////////////////////////////////////////////////////////////
 
 // ============================================================================
@@ -43,6 +43,7 @@
 #include "wx/filename.h"
 #include "wx/msgout.h"
 #include "wx/scopedptr.h"
+#include "wx/sysopt.h"
 #include "wx/tokenzr.h"
 #include "wx/thread.h"
 
@@ -146,14 +147,17 @@ wxAppConsoleBase::wxAppConsoleBase()
     // In unicode mode the SetTraceMasks call can cause an apptraits to be
     // created, but since we are still in the constructor the wrong kind will
     // be created for GUI apps.  Destroy it so it can be created again later.
-    delete m_traits;
-    m_traits = NULL;
+    wxDELETE(m_traits);
 #endif
 #endif
 }
 
 wxAppConsoleBase::~wxAppConsoleBase()
 {
+    // we're being destroyed and using this object from now on may not work or
+    // even crash so don't leave dangling pointers to it
+    ms_appInstance = NULL;
+
     delete m_traits;
 }
 
@@ -209,11 +213,7 @@ wxEventLoopBase *wxAppConsoleBase::CreateMainLoop()
 
 void wxAppConsoleBase::CleanUp()
 {
-    if ( m_mainLoop )
-    {
-        delete m_mainLoop;
-        m_mainLoop = NULL;
-    }
+    wxDELETE(m_mainLoop);
 }
 
 // ----------------------------------------------------------------------------
@@ -345,8 +345,11 @@ bool wxAppConsoleBase::Dispatch()
 bool wxAppConsoleBase::Yield(bool onlyIfNeeded)
 {
     wxEventLoopBase * const loop = wxEventLoopBase::GetActive();
+    if ( loop )
+       return loop->Yield(onlyIfNeeded);
 
-    return loop && loop->Yield(onlyIfNeeded);
+    wxScopedPtr<wxEventLoopBase> tmpLoop(CreateMainLoop());
+    return tmpLoop->Yield(onlyIfNeeded);
 }
 
 void wxAppConsoleBase::WakeUpIdle()
@@ -370,6 +373,9 @@ bool wxAppConsoleBase::ProcessIdle()
     wxLog::FlushActive();
 #endif
 
+    // Garbage collect all objects previously scheduled for destruction.
+    DeletePendingObjects();
+
     return event.MoreRequested();
 }
 
@@ -509,9 +515,6 @@ void wxAppConsoleBase::ProcessPendingEvents()
 
         wxLEAVE_CRIT_SECT(m_handlersWithPendingEventsLocker);
     }
-
-    // Garbage collect all objects previously scheduled for destruction.
-    DeletePendingObjects();
 }
 
 void wxAppConsoleBase::DeletePendingEvents()
@@ -535,7 +538,7 @@ void wxAppConsoleBase::DeletePendingEvents()
 
 bool wxAppConsoleBase::IsScheduledForDestruction(wxObject *object) const
 {
-    return wxPendingDelete.Member(object) != NULL;
+    return wxPendingDelete.Member(object);
 }
 
 void wxAppConsoleBase::ScheduleForDestruction(wxObject *object)
@@ -868,22 +871,19 @@ void WXDLLIMPEXP_BASE wxMutexGuiLeave()
 bool wxAppTraitsBase::ShowAssertDialog(const wxString& msgOriginal)
 {
 #if wxDEBUG_LEVEL
-    wxString msg = msgOriginal;
+    wxString msg;
 
 #if wxUSE_STACKWALKER
-#if !defined(__WXMSW__)
-    // on Unix stack frame generation may take some time, depending on the
-    // size of the executable mainly... warn the user that we are working
-    wxFprintf(stderr, wxT("[Debug] Generating a stack trace... please wait"));
-    fflush(stderr);
-#endif
-
     const wxString stackTrace = GetAssertStackTrace();
     if ( !stackTrace.empty() )
+    {
         msg << wxT("\n\nCall stack:\n") << stackTrace;
+
+        wxMessageOutputDebug().Output(msg);
+    }
 #endif // wxUSE_STACKWALKER
 
-    return DoShowAssertDialog(msg);
+    return DoShowAssertDialog(msgOriginal + msg);
 #else // !wxDEBUG_LEVEL
     wxUnusedVar(msgOriginal);
 
@@ -895,6 +895,15 @@ bool wxAppTraitsBase::ShowAssertDialog(const wxString& msgOriginal)
 wxString wxAppTraitsBase::GetAssertStackTrace()
 {
 #if wxDEBUG_LEVEL
+
+#if !defined(__WXMSW__)
+    // on Unix stack frame generation may take some time, depending on the
+    // size of the executable mainly... warn the user that we are working
+    wxFprintf(stderr, "Collecting stack trace information, please wait...");
+    fflush(stderr);
+#endif // !__WXMSW__
+
+
     wxString stackTrace;
 
     class StackDump : public wxStackWalker
@@ -1017,6 +1026,10 @@ wxDefaultAssertHandler(const wxString& file,
                        const wxString& cond,
                        const wxString& msg)
 {
+    // If this option is set, we should abort immediately when assert happens.
+    if ( wxSystemOptions::GetOptionInt("exit-on-assert") )
+        abort();
+
     // FIXME MT-unsafe
     static int s_bInAssert = 0;
 
@@ -1182,14 +1195,10 @@ bool DoShowAssertDialog(const wxString& msg)
         //case IDNO: nothing to do
     }
 #else // !__WXMSW__
-    wxFprintf(stderr, wxT("%s\n"), msg.c_str());
-    fflush(stderr);
-
-    // TODO: ask the user to enter "Y" or "N" on the console?
-    wxTrap();
+    wxUnusedVar(msg);
 #endif // __WXMSW__/!__WXMSW__
 
-    // continue with the asserts
+    // continue with the asserts by default
     return false;
 }
 
@@ -1232,27 +1241,15 @@ void ShowAssertDialog(const wxString& file,
     // since dialogs cannot be displayed
     if ( !wxThread::IsMain() )
     {
-        msg += wxT(" [in child thread]");
-
-#if defined(__WXMSW__) && !defined(__WXMICROWIN__)
-        msg << wxT("\r\n");
-        OutputDebugString(msg.wx_str());
-#else
-        // send to stderr
-        wxFprintf(stderr, wxT("%s\n"), msg.c_str());
-        fflush(stderr);
-#endif
-        // He-e-e-e-elp!! we're asserting in a child thread
-        wxTrap();
+        msg += wxString::Format(" [in thread %lx]", wxThread::GetCurrentId());
     }
-    else
 #endif // wxUSE_THREADS
 
+    // log the assert in any case
+    wxMessageOutputDebug().Output(msg);
+
     if ( !s_bNoAsserts )
     {
-        // send it to the normal log destination
-        wxLogDebug(wxT("%s"), msg.c_str());
-
         if ( traits )
         {
             // delegate showing assert dialog (if possible) to that class