Glibc error (possible in qt text rendering ?)



  • 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 ***@



  • 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
    @



  • @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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