OK. Here's my results for your precise tests - completely clean.
andrew@andrew-laptop:~/software/plplot/build_qt5$ ldd -r drivers/qt.so |& grep
-i qt
libQt5Svg.so.5 => /usr/lib/x86_64-linux-gnu/libQt5Svg.so.5
(0x00007f09fff34000)
libQt5Gui.so.5 => /usr/lib/x86_64-linux-gnu/libQt5Gui.so.5
(0x00007f09ff801000)
libplplot.so.12 =>
/home/andrew/software/plplot/build_qt5/src/libplplot.so.12 (0x00007f09ff56f000)
libplplotqt.so.1 =>
/home/andrew/software/plplot/build_qt5/bindings/qt_gui/libplplotqt.so.1
(0x00007f09ff34c000)
libQt5Widgets.so.5 => /usr/lib/x86_64-linux-gnu/libQt5Widgets.so.5
(0x00007f09feafc000)
libQt5Core.so.5 => /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
(0x00007f09fe3c5000)
libcsirocsa.so.0 =>
/home/andrew/software/plplot/build_qt5/lib/csa/libcsirocsa.so.0
(0x00007f09fc5d7000)
libcsironn.so.0 =>
/home/andrew/software/plplot/build_qt5/lib/nn/libcsironn.so.0
(0x00007f09fc3cc000)
libqsastime.so.0 =>
/home/andrew/software/plplot/build_qt5/lib/qsastime/libqsastime.so.0
(0x00007f09fc1c3000)
libQt5PrintSupport.so.5 =>
/usr/lib/x86_64-linux-gnu/libQt5PrintSupport.so.5 (0x00007f09fbf53000)
andrew@andrew-laptop:~/software/plplot/build_qt5$ ldd -r
examples/c++/qt_example |& grep -i qt
libQt5Gui.so.5 => /usr/lib/x86_64-linux-gnu/libQt5Gui.so.5
(0x00007f5cc7904000)
libplplotqt.so.1 =>
/home/andrew/software/plplot/build_qt5/bindings/qt_gui/libplplotqt.so.1
(0x00007f5cc76e0000)
libplplot.so.12 =>
/home/andrew/software/plplot/build_qt5/src/libplplot.so.12 (0x00007f5cc744e000)
libQt5Widgets.so.5 => /usr/lib/x86_64-linux-gnu/libQt5Widgets.so.5
(0x00007f5cc6bff000)
libQt5Core.so.5 => /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
(0x00007f5cc64c7000)
libQt5Svg.so.5 => /usr/lib/x86_64-linux-gnu/libQt5Svg.so.5
(0x00007f5cc4d58000)
libQt5PrintSupport.so.5 =>
/usr/lib/x86_64-linux-gnu/libQt5PrintSupport.so.5 (0x00007f5cc4ae8000)
libcsirocsa.so.0 =>
/home/andrew/software/plplot/build_qt5/lib/csa/libcsirocsa.so.0
(0x00007f5cc421c000)
libcsironn.so.0 =>
/home/andrew/software/plplot/build_qt5/lib/nn/libcsironn.so.0
(0x00007f5cc4011000)
libqsastime.so.0 =>
/home/andrew/software/plplot/build_qt5/lib/qsastime/libqsastime.so.0
(0x00007f5cc3e09000)
andrew@andrew-laptop:~/software/plplot/build_qt5$ valgrind examples/c/x01c -dev
qtwidget
==26547== Memcheck, a memory error detector
==26547== Copyright (C) 2002-2013, and GNU GPL'd, by Julian Seward et al.
==26547== Using Valgrind-3.10.0 and LibVEX; rerun with -h for copyright info
==26547== Command: examples/c/x01c -dev qtwidget
==26547==
PLplot library version: 5.10.0
==26547==
==26547== HEAP SUMMARY:
==26547== in use at exit: 1,170,008 bytes in 8,191 blocks
==26547== total heap usage: 85,719 allocs, 77,528 frees, 14,358,512 bytes
allocated
==26547==
==26547== LEAK SUMMARY:
==26547== definitely lost: 10,006 bytes in 77 blocks
==26547== indirectly lost: 1,005,606 bytes in 7,311 blocks
==26547== possibly lost: 4,676 bytes in 83 blocks
==26547== still reachable: 149,720 bytes in 720 blocks
==26547== suppressed: 0 bytes in 0 blocks
==26547== Rerun with --leak-check=full to see details of leaked memory
==26547==
==26547== For counts of detected and suppressed errors, rerun with: -v
==26547== ERROR SUMMARY: 0 errors from 0 contexts (suppressed: 1 from 1)
iandrew@andrew-laptop:~/software/plplot/build_qt5$ valgrind
examples/c++/qt_example
==26675== Memcheck, a memory error detector
==26675== Copyright (C) 2002-2013, and GNU GPL'd, by Julian Seward et al.
==26675== Using Valgrind-3.10.0 and LibVEX; rerun with -h for copyright info
==26675== Command: examples/c++/qt_example
==26675==
==26675==
==26675== HEAP SUMMARY:
==26675== in use at exit: 1,202,784 bytes in 8,319 blocks
==26675== total heap usage: 99,582 allocs, 91,263 frees, 18,785,515 bytes
allocated
==26675==
==26675== LEAK SUMMARY:
==26675== definitely lost: 10,220 bytes in 113 blocks
==26675== indirectly lost: 510,106 bytes in 7,345 blocks
==26675== possibly lost: 507,536 bytes in 84 blocks
==26675== still reachable: 174,922 bytes in 777 blocks
==26675== suppressed: 0 bytes in 0 blocks
==26675== Rerun with --leak-check=full to see details of leaked memory
==26675==
==26675== For counts of detected and suppressed errors, rerun with: -v
==26675== ERROR SUMMARY: 0 errors from 0 contexts (suppressed: 6 from 1)
On Tue, Mar 03, 2015 at 05:09:25PM -0800, Alan Irwin wrote:
> Hi Andrew:
>
> Thanks for helping out. More below in context:
>
> On 2015-03-03 22:03-0000 Andrew Ross wrote:
>
> >
> >Alan,
> >
> >As a further reference point, I've tried with Qt5 on Ubuntu 14.10 (this is
> >5.3.0) and I get lots of lost / still reachable memory issues, but no
> >invalid reads (which I think was your concern). Just to be absolutely
> >clear, I've tested
> >
> >valgrind --leak-check=full --log-file=log --trace-children=yes ./x01c -dev
> >qtwidget
> >
> >and also the c++ qt_example.
> >
> >Does this correspond to your test?
>
> Not exactly, but I don't think that matters for an invalid read. But
> just to be sure here are my exact tests and results:
>
> # Tests the qtwidget device (which is part of qt.so) and qt_example really
> are linked to Qt5:
> wine@raven> ldd -r drivers/qt.so |& grep -i qt
> libQt5Svg.so.5 =>
> /home/wine/newstart/build_script/install-linux/lib/libQt5Svg.so.5
> (0x00007f56cfb65000)
> libQt5Gui.so.5 =>
> /home/wine/newstart/build_script/install-linux/lib/libQt5Gui.so.5
> (0x00007f56cf44f000)
> libQt5PrintSupport.so.5 =>
> /home/wine/newstart/build_script/install-linux/lib/libQt5PrintSupport.so.5
> (0x00007f56cf1eb000)
> libplplotqt.so.1 =>
> /home/wine/newstart/build_script/build_dir-linux/epa_build/Source/comprehensive_test_disposeable/shared/build_tree/bindings/qt_gui/libplplotqt.so.1
> (0x00007f56ced51000)
> libQt5Widgets.so.5 =>
> /home/wine/newstart/build_script/install-linux/lib/libQt5Widgets.so.5
> (0x00007f56ce552000)
> libQt5Core.so.5 =>
> /home/wine/newstart/build_script/install-linux/lib/libQt5Core.so.5
> (0x00007f56cdd92000)
> wine@raven> ldd -r examples/c++/qt_example |& grep -i qt
> libQt5Svg.so.5 =>
> /home/wine/newstart/build_script/install-linux/lib/libQt5Svg.so.5
> (0x00007f84e79bc000)
> libQt5Gui.so.5 =>
> /home/wine/newstart/build_script/install-linux/lib/libQt5Gui.so.5
> (0x00007f84e72a6000)
> libQt5PrintSupport.so.5 =>
> /home/wine/newstart/build_script/install-linux/lib/libQt5PrintSupport.so.5
> (0x00007f84e7042000)
> libplplotqt.so.1 =>
> /home/wine/newstart/build_script/build_dir-linux/epa_build/Source/comprehensive_test_disposeable/shared/build_tree/bindings/qt_gui/libplplotqt.so.1
> (0x00007f84e6e29000)
> libQt5Widgets.so.5 =>
> /home/wine/newstart/build_script/install-linux/lib/libQt5Widgets.so.5
> (0x00007f84e63a9000)
> libQt5Core.so.5 =>
> /home/wine/newstart/build_script/install-linux/lib/libQt5Core.so.5
> (0x00007f84e5be9000)
>
> # valgrind results:
>
> wine@raven> valgrind examples/c/x01c -dev qtwidget
> ==16629== Memcheck, a memory error detector
> ==16629== Copyright (C) 2002-2011, and GNU GPL'd, by Julian Seward et al.
> ==16629== Using Valgrind-3.7.0 and LibVEX; rerun with -h for copyright info
> ==16629== Command: examples/c/x01c -dev qtwidget
> ==16629== PLplot library version: 5.10.0
> ==16629== Invalid read of size 8
> ==16629== at 0xB59E174: ??? (in
> /home/wine/newstart/build_script/install-linux/plugins/platforms/libqxcb.so)
> ==16629== by 0xB59E1AB: ??? (in
> /home/wine/newstart/build_script/install-linux/plugins/platforms/libqxcb.so)
> ==16629== by 0xB59E1E8: ??? (in
> /home/wine/newstart/build_script/install-linux/plugins/platforms/libqxcb.so)
> ==16629== by 0x7704D32: QBackingStore::~QBackingStore() (in
> /home/wine/newstart/build_script/install-linux/lib/libQt5Gui.so.5.3.2)
> ==16629== by 0x81C00F1: QWidgetPrivate::deleteTLSysExtra() (in
> /home/wine/newstart/build_script/install-linux/lib/libQt5Widgets.so.5.3.2)
> ==16629== by 0x81C172F: QWidget::destroy(bool, bool) (in
> /home/wine/newstart/build_script/install-linux/lib/libQt5Widgets.so.5.3.2)
> ==16629== by 0x81A9B50: QWidget::~QWidget() (in
> /home/wine/newstart/build_script/install-linux/lib/libQt5Widgets.so.5.3.2)
> ==16629== by 0x7E17558: QtPLWidget::~QtPLWidget() (in
> /home/wine/newstart/build_script/build_dir-linux/epa_build/Source/comprehensive_test_disposeable/shared/build_tree/bindings/qt_gui/libplplotqt.so.1.0.0)
> ==16629== by 0x7039935: plD_tidy_qtwidget(PLStream*) (in
> /home/wine/newstart/build_script/build_dir-linux/epa_build/Source/comprehensive_test_disposeable/shared/build_tree/drivers/qt.so)
> ==16629== by 0x4E50A5E: c_plend1 (in
> /home/wine/newstart/build_script/build_dir-linux/epa_build/Source/comprehensive_test_disposeable/shared/build_tree/src/libplplot.so.12.0.1)
> ==16629== by 0x4E50AC2: c_plend (in
> /home/wine/newstart/build_script/build_dir-linux/epa_build/Source/comprehensive_test_disposeable/shared/build_tree/src/libplplot.so.12.0.1)
> ==16629== by 0x40161B: main (in
> /home/wine/newstart/build_script/build_dir-linux/epa_build/Source/comprehensive_test_disposeable/shared/build_tree/examples/c/x01c)
> ==16629== Address 0xd682908 is 40 bytes inside a block of size 48 free'd
> ==16629== at 0x4C27D4E: free (vg_replace_malloc.c:427)
> ==16629== by 0xB59E127: ??? (in
> /home/wine/newstart/build_script/install-linux/plugins/platforms/libqxcb.so)
> ==16629== by 0xB59E1AB: ??? (in
> /home/wine/newstart/build_script/install-linux/plugins/platforms/libqxcb.so)
> ==16629== by 0xB59E1E8: ??? (in
> /home/wine/newstart/build_script/install-linux/plugins/platforms/libqxcb.so)
> ==16629== by 0x7704D32: QBackingStore::~QBackingStore() (in
> /home/wine/newstart/build_script/install-linux/lib/libQt5Gui.so.5.3.2)
> ==16629== by 0x81C00F1: QWidgetPrivate::deleteTLSysExtra() (in
> /home/wine/newstart/build_script/install-linux/lib/libQt5Widgets.so.5.3.2)
> ==16629== by 0x81C172F: QWidget::destroy(bool, bool) (in
> /home/wine/newstart/build_script/install-linux/lib/libQt5Widgets.so.5.3.2)
> ==16629== by 0x81A9B50: QWidget::~QWidget() (in
> /home/wine/newstart/build_script/install-linux/lib/libQt5Widgets.so.5.3.2)
> ==16629== by 0x7E17558: QtPLWidget::~QtPLWidget() (in
> /home/wine/newstart/build_script/build_dir-linux/epa_build/Source/comprehensive_test_disposeable/shared/build_tree/bindings/qt_gui/libplplotqt.so.1.0.0)
> ==16629== by 0x7039935: plD_tidy_qtwidget(PLStream*) (in
> /home/wine/newstart/build_script/build_dir-linux/epa_build/Source/comprehensive_test_disposeable/shared/build_tree/drivers/qt.so)
> ==16629== by 0x4E50A5E: c_plend1 (in
> /home/wine/newstart/build_script/build_dir-linux/epa_build/Source/comprehensive_test_disposeable/shared/build_tree/src/libplplot.so.12.0.1)
> ==16629== by 0x4E50AC2: c_plend (in
> /home/wine/newstart/build_script/build_dir-linux/epa_build/Source/comprehensive_test_disposeable/shared/build_tree/src/libplplot.so.12.0.1)
> ==16629== ==16629== ==16629== HEAP SUMMARY:
> ==16629== in use at exit: 107,048 bytes in 1,510 blocks
> ==16629== total heap usage: 55,548 allocs, 54,038 frees, 14,520,479 bytes
> allocated
> ==16629== ==16629== LEAK SUMMARY:
> ==16629== definitely lost: 460 bytes in 10 blocks
> ==16629== indirectly lost: 61,739 bytes in 1,344 blocks
> ==16629== possibly lost: 0 bytes in 0 blocks
> ==16629== still reachable: 44,849 bytes in 156 blocks
> ==16629== suppressed: 0 bytes in 0 blocks
> ==16629== Rerun with --leak-check=full to see details of leaked memory
> ==16629== ==16629== For counts of detected and suppressed errors, rerun
> with: -v
> ==16629== ERROR SUMMARY: 1 errors from 1 contexts (suppressed: 5 from 5)
>
> In the above -dev qtwidget case, the invalid read error was generated when I
> exited
> the plot by hitting the enter key, and I got similar results with
> the other exit methods (alt F4 and hitting the delete button on the
> GUI).
>
> wine@raven> valgrind examples/c++/qt_example ==16635== Memcheck, a memory
> error detector
> ==16635== Copyright (C) 2002-2011, and GNU GPL'd, by Julian Seward et al.
> ==16635== Using Valgrind-3.7.0 and LibVEX; rerun with -h for copyright info
> ==16635== Command: examples/c++/qt_example
> ==16635== ==16635== Invalid read of size 8
> ==16635== at 0xB395174: ??? (in
> /home/wine/newstart/build_script/install-linux/plugins/platforms/libqxcb.so)
> ==16635== by 0xB3951AB: ??? (in
> /home/wine/newstart/build_script/install-linux/plugins/platforms/libqxcb.so)
> ==16635== by 0xB3951E8: ??? (in
> /home/wine/newstart/build_script/install-linux/plugins/platforms/libqxcb.so)
> ==16635== by 0x52F7D32: QBackingStore::~QBackingStore() (in
> /home/wine/newstart/build_script/install-linux/lib/libQt5Gui.so.5.3.2)
> ==16635== by 0x60340F1: QWidgetPrivate::deleteTLSysExtra() (in
> /home/wine/newstart/build_script/install-linux/lib/libQt5Widgets.so.5.3.2)
> ==16635== by 0x603572F: QWidget::destroy(bool, bool) (in
> /home/wine/newstart/build_script/install-linux/lib/libQt5Widgets.so.5.3.2)
> ==16635== by 0x601DB50: QWidget::~QWidget() (in
> /home/wine/newstart/build_script/install-linux/lib/libQt5Widgets.so.5.3.2)
> ==16635== by 0x404480: PlotWindow::~PlotWindow() (in
> /home/wine/newstart/build_script/build_dir-linux/epa_build/Source/comprehensive_test_disposeable/shared/build_tree/examples/c++/qt_example)
> ==16635== by 0x69A60B7: QObject::event(QEvent*) (in
> /home/wine/newstart/build_script/install-linux/lib/libQt5Core.so.5.3.2)
> ==16635== by 0x6018AB0: QWidget::event(QEvent*) (in
> /home/wine/newstart/build_script/install-linux/lib/libQt5Widgets.so.5.3.2)
> ==16635== by 0x610F04A: QMainWindow::event(QEvent*) (in
> /home/wine/newstart/build_script/install-linux/lib/libQt5Widgets.so.5.3.2)
> ==16635== by 0x5FE0B9B: QApplicationPrivate::notify_helper(QObject*,
> QEvent*) (in
> /home/wine/newstart/build_script/install-linux/lib/libQt5Widgets.so.5.3.2)
> ==16635== Address 0xd530558 is 40 bytes inside a block of size 48 free'd
> ==16635== at 0x4C27D4E: free (vg_replace_malloc.c:427)
> ==16635== by 0xB395127: ??? (in
> /home/wine/newstart/build_script/install-linux/plugins/platforms/libqxcb.so)
> ==16635== by 0xB3951AB: ??? (in
> /home/wine/newstart/build_script/install-linux/plugins/platforms/libqxcb.so)
> ==16635== by 0xB3951E8: ??? (in
> /home/wine/newstart/build_script/install-linux/plugins/platforms/libqxcb.so)
> ==16635== by 0x52F7D32: QBackingStore::~QBackingStore() (in
> /home/wine/newstart/build_script/install-linux/lib/libQt5Gui.so.5.3.2)
> ==16635== by 0x60340F1: QWidgetPrivate::deleteTLSysExtra() (in
> /home/wine/newstart/build_script/install-linux/lib/libQt5Widgets.so.5.3.2)
> ==16635== by 0x603572F: QWidget::destroy(bool, bool) (in
> /home/wine/newstart/build_script/install-linux/lib/libQt5Widgets.so.5.3.2)
> ==16635== by 0x601DB50: QWidget::~QWidget() (in
> /home/wine/newstart/build_script/install-linux/lib/libQt5Widgets.so.5.3.2)
> ==16635== by 0x404480: PlotWindow::~PlotWindow() (in
> /home/wine/newstart/build_script/build_dir-linux/epa_build/Source/comprehensive_test_disposeable/shared/build_tree/examples/c++/qt_example)
> ==16635== by 0x69A60B7: QObject::event(QEvent*) (in
> /home/wine/newstart/build_script/install-linux/lib/libQt5Core.so.5.3.2)
> ==16635== by 0x6018AB0: QWidget::event(QEvent*) (in
> /home/wine/newstart/build_script/install-linux/lib/libQt5Widgets.so.5.3.2)
> ==16635== by 0x610F04A: QMainWindow::event(QEvent*) (in
> /home/wine/newstart/build_script/install-linux/lib/libQt5Widgets.so.5.3.2)
> ==16635== ==16635== ==16635== HEAP SUMMARY:
> ==16635== in use at exit: 152,566 bytes in 1,606 blocks
> ==16635== total heap usage: 42,607 allocs, 41,001 frees, 11,215,207 bytes
> allocated
> ==16635== ==16635== LEAK SUMMARY:
> ==16635== definitely lost: 370 bytes in 8 blocks
> ==16635== indirectly lost: 61,271 bytes in 1,340 blocks
> ==16635== possibly lost: 0 bytes in 0 blocks
> ==16635== still reachable: 90,925 bytes in 258 blocks
> ==16635== suppressed: 0 bytes in 0 blocks
> ==16635== Rerun with --leak-check=full to see details of leaked memory
> ==16635== ==16635== For counts of detected and suppressed errors, rerun
> with: -v
> ==16635== ERROR SUMMARY: 1 errors from 1 contexts (suppressed: 5 from 5)
>
> For the above qt_example case, the invalid read was generated by
> immediately exiting with alt-F4. If I pushed the buttons on the GUI
> corresponding to plotting something first no additional errors were
> generated beyond what you get with exit alone. If I pushed the button
> that activated the cursor, all was well until I attempted to exit that
> mode with by hitting the OK button which generated additional invalid
> read errors beyond what you get with exit alone.
>
> I think valgrind would report a serious issue like invalid read
> regardless of command-line options so I think the best summary of the
> situation is valgrind reports invalid reads with epa_built Qt 5.3.1
> and 5.3.2 and does not report such issues with Ubuntu-built (and
> patched) Qt5 5.3.0.
>
> So thanks to your report my working hypothesis now is that the
> configuration of the epa_built Qt5 is somehow to blame here even
> though there are no warnings about the configuration options that I
> use in the Qt5 build log.
>
> My next step is I am going to download the Qt5 build configuration
> used by Debian testing and/or Ubuntu to see if I can spot some key
> configuration option that epa_build is missing for Qt5.3.x.
>
> Alan
>
> __________________________
> Alan W. Irwin
>
> Astronomical research affiliation with Department of Physics and Astronomy,
> University of Victoria (astrowww.phys.uvic.ca).
>
> Programming affiliations with the FreeEOS equation-of-state
> implementation for stellar interiors (freeeos.sf.net); the Time
> Ephemerides project (timeephem.sf.net); PLplot scientific plotting
> software package (plplot.sf.net); the libLASi project
> (unifont.org/lasi); the Loads of Linux Links project (loll.sf.net);
> and the Linux Brochure Project (lbproject.sf.net).
> __________________________
>
> Linux-powered Science
> __________________________
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