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  4. Glibc error (possible in qt text rendering ?)

Glibc error (possible in qt text rendering ?)

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  • B Offline
    B Offline
    bhatiaharsh
    wrote on last edited by
    #1

    Hello,

    I am facing this problem with my application. When I run the app, it gives me a glibc error. However, it DOES NOT always give this error. At certain occasions, it runs just fine. I am unable to debug it using QTCreator or check the memory profile using Valgrind.

    For some reason, whenever I try to check it using valgrind, it doesn't throw the error. Can someone guide me as to how to narrow down on the problem ?

    This is the error:
    @*** glibc detected *** ./Jacobi: realloc(): invalid old size: 0x0000000000b37130 ***@

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    • B Offline
      B Offline
      bhatiaharsh
      wrote on last edited by
      #2

      And the stack trace is:
      @
      0 __lll_lock_wait_private /lib64/libc.so.6 0 0x7ffff55b473e
      1 _L_lock_9946 /lib64/libc.so.6 0 0x7ffff5548d21
      2 malloc /lib64/libc.so.6 0 0x7ffff5546d60
      3 _dl_map_object_deps /lib64/ld-linux-x86-64.so.2 0 0x7ffff7de84a9
      4 dl_open_worker /lib64/ld-linux-x86-64.so.2 0 0x7ffff7dedc88
      5 _dl_catch_error /lib64/ld-linux-x86-64.so.2 0 0x7ffff7de9c36
      6 _dl_open /lib64/ld-linux-x86-64.so.2 0 0x7ffff7ded7ca
      7 do_dlopen /lib64/libc.so.6 0 0x7ffff55de840
      8 _dl_catch_error /lib64/ld-linux-x86-64.so.2 0 0x7ffff7de9c36
      9 dlerror_run /lib64/libc.so.6 0 0x7ffff55de8df
      10 __libc_dlopen_mode /lib64/libc.so.6 0 0x7ffff55de947
      11 init /lib64/libc.so.6 0 0x7ffff55b9d15
      12 pthread_once /lib64/libpthread.so.0 0 0x7ffff65653d3
      13 backtrace /lib64/libc.so.6 0 0x7ffff55b9e34
      14 __libc_message /lib64/libc.so.6 0 0x7ffff553cedf
      15 malloc_printerr /lib64/libc.so.6 0 0x7ffff5542c06
      16 _int_realloc /lib64/libc.so.6 0 0x7ffff5545977
      17 realloc /lib64/libc.so.6 0 0x7ffff55473be
      18 ft_mem_qrealloc /usr/lib64/libfreetype.so.6 0 0x7ffff52568a2
      19 ft_mem_realloc /usr/lib64/libfreetype.so.6 0 0x7ffff525695b
      20 FT_GlyphLoader_CheckPoints /usr/lib64/libfreetype.so.6 0 0x7ffff5256b17
      21 ?? /usr/lib64/libfreetype.so.6 0 0x7ffff5262daf
      22 ?? /usr/lib64/libfreetype.so.6 0 0x7ffff5267329
      23 ?? /usr/lib64/libfreetype.so.6 0 0x7ffff526c911
      24 FT_Load_Glyph /usr/lib64/libfreetype.so.6 0 0x7ffff5259164
      25 QFontEngineFT::loadGlyph(QFontEngineFT::QGlyphSet*, unsigned int, QFontEngineFT::GlyphFormat, bool) const /usr/lib64/libQtGui.so.4 0 0x7ffff70bb4c6
      26 QFontEngineFT::recalcAdvances(QGlyphLayout*, QFlagsQTextEngine::ShaperFlag) const /usr/lib64/libQtGui.so.4 0 0x7ffff70bd038
      27 ?? /usr/lib64/libQtGui.so.4 0 0x7ffff6ff0bf8
      28 ?? /usr/lib64/libQtCore.so.4 0 0x7ffff6857163
      29 ?? /usr/lib64/libQtCore.so.4 0 0x7ffff685b504
      30 QTextEngine::shapeTextWithHarfbuzz(int) const /usr/lib64/libQtGui.so.4 0 0x7ffff7020d64
      31 QTextEngine::shapeText(int) const /usr/lib64/libQtGui.so.4 0 0x7ffff70215cb
      32 QTextEngine::shape(int) const /usr/lib64/libQtGui.so.4 0 0x7ffff70218e8
      33 QTextLine::layout_helper(int) /usr/lib64/libQtGui.so.4 0 0x7ffff702b3a0
      34 ?? /usr/lib64/libQtGui.so.4 0 0x7ffff6f2691c
      35 ?? /usr/lib64/libQtGui.so.4 0 0x7ffff6f27221
      36 QFontMetrics::boundingRect(QRect const&, int, QString const&, int, int*) const /usr/lib64/libQtGui.so.4 0 0x7ffff6ffe80f
      37 QFontMetrics::size(int, QString const&, int, int*) const /usr/lib64/libQtGui.so.4 0 0x7ffff6ffe88f
      38 ?? /usr/lib64/kde4/plugins/styles/oxygen.so 0 0x7fffeaddbd3e
      39 ?? /usr/lib64/kde4/plugins/styles/oxygen.so 0 0x7fffeaddc11b
      40 QCommonStyle::drawComplexControl(QStyle::ComplexControl, QStyleOptionComplex const*, QPainter*, QWidget const*) const /usr/lib64/libQtGui.so.4 0 0x7ffff70e5ffc
      41 ?? /usr/lib64/kde4/plugins/styles/oxygen.so 0 0x7fffeadcb72b
      42 QGroupBox::paintEvent(QPaintEvent*) /usr/lib64/libQtGui.so.4 0 0x7ffff71ce05b
      43 QWidget::event(QEvent*) /usr/lib64/libQtGui.so.4 0 0x7ffff6e292b8
      44 QGroupBox::event(QEvent*) /usr/lib64/libQtGui.so.4 0 0x7ffff71cef17
      45 QApplicationPrivate::notify_helper(QObject*, QEvent*) /usr/lib64/libQtGui.so.4 0 0x7ffff6dd8c34
      46 QApplication::notify(QObject*, QEvent*) /usr/lib64/libQtGui.so.4 0 0x7ffff6dddac1
      47 QCoreApplication::notifyInternal(QObject*, QEvent*) /usr/lib64/libQtCore.so.4 0 0x7ffff68d681c
      48 QWidgetPrivate::drawWidget(QPaintDevice*, QRegion const&, QPoint const&, int, QPainter*, QWidgetBackingStore*) /usr/lib64/libQtGui.so.4 0 0x7ffff6e261c6
      49 QWidgetPrivate::paintSiblingsRecursive(QPaintDevice*, QList<QObject*> const&, int, QRegion const&, QPoint const&, int, QPainter*, QWidgetBackingStore*) /usr/lib64/libQtGui.so.4 0 0x7ffff6e26da0
      50 QWidgetPrivate::paintSiblingsRecursive(QPaintDevice*, QList<QObject*> const&, int, QRegion const&, QPoint const&, int, QPainter*, QWidgetBackingStore*) /usr/lib64/libQtGui.so.4 0 0x7ffff6e26c80
      51 QWidgetPrivate::paintSiblingsRecursive(QPaintDevice*, QList<QObject*> const&, int, QRegion const&, QPoint const&, int, QPainter*, QWidgetBackingStore*) /usr/lib64/libQtGui.so.4 0 0x7ffff6e26c80
      52 QWidgetPrivate::drawWidget(QPaintDevice*, QRegion const&, QPoint const&, int, QPainter*, QWidgetBackingStore*) /usr/lib64/libQtGui.so.4 0 0x7ffff6e25efc
      @

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      • B Offline
        B Offline
        bhatiaharsh
        wrote on last edited by
        #3

        @53 QWidgetPrivate::paintSiblingsRecursive(QPaintDevice*, QList<QObject*> const&, int, QRegion const&, QPoint const&, int, QPainter*, QWidgetBackingStore*) /usr/lib64/libQtGui.so.4 0 0x7ffff6e26da0
        54 QWidgetPrivate::drawWidget(QPaintDevice*, QRegion const&, QPoint const&, int, QPainter*, QWidgetBackingStore*) /usr/lib64/libQtGui.so.4 0 0x7ffff6e25efc
        55 QWidgetPrivate::paintSiblingsRecursive(QPaintDevice*, QList<QObject*> const&, int, QRegion const&, QPoint const&, int, QPainter*, QWidgetBackingStore*) /usr/lib64/libQtGui.so.4 0 0x7ffff6e26da0
        56 QWidgetPrivate::paintSiblingsRecursive(QPaintDevice*, QList<QObject*> const&, int, QRegion const&, QPoint const&, int, QPainter*, QWidgetBackingStore*) /usr/lib64/libQtGui.so.4 0 0x7ffff6e26c80
        57 QWidgetPrivate::drawWidget(QPaintDevice*, QRegion const&, QPoint const&, int, QPainter*, QWidgetBackingStore*) /usr/lib64/libQtGui.so.4 0 0x7ffff6e25efc
        58 ?? /usr/lib64/libQtGui.so.4 0 0x7ffff6fe5278
        59 ?? /usr/lib64/libQtGui.so.4 0 0x7ffff6fe5605
        60 ?? /usr/lib64/libQtGui.so.4 0 0x7ffff6e53d6a
        61 QApplication::x11ProcessEvent(_XEvent*) /usr/lib64/libQtGui.so.4 0 0x7ffff6e54dc9
        62 ?? /usr/lib64/libQtGui.so.4 0 0x7ffff6e7c312
        63 g_main_context_dispatch /usr/lib64/libglib-2.0.so.0 0 0x7ffff484158d
        64 ?? /usr/lib64/libglib-2.0.so.0 0 0x7ffff4841d88
        65 g_main_context_iteration /usr/lib64/libglib-2.0.so.0 0 0x7ffff4841f59
        66 QEventDispatcherGlib::processEvents(QFlagsQEventLoop::ProcessEventsFlag) /usr/lib64/libQtCore.so.4 0 0x7ffff690150f
        67 ?? /usr/lib64/libQtGui.so.4 0 0x7ffff6e7bf9e
        68 QEventLoop::processEvents(QFlagsQEventLoop::ProcessEventsFlag) /usr/lib64/libQtCore.so.4 0 0x7ffff68d5a22
        69 QEventLoop::exec(QFlagsQEventLoop::ProcessEventsFlag) /usr/lib64/libQtCore.so.4 0 0x7ffff68d5c1f
        70 QCoreApplication::exec() /usr/lib64/libQtCore.so.4 0 0x7ffff68d9de7
        71 main main.cc 17 0x446824 @

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