Qt 4.8.7 crashes on Cortex A9 with QDeclarativeView

mertcanozdemir

Hi all,
I am trying to build a project with 3 devices. I need to use Qt 4.8.7 because older devices doesn't have a c++11 supported compiler. The older ones are working fine, they have generic armv7l cpu. Compiled and ran without problems(qws). But the third one has a cortex a9 cpu(dvf101) when i try to run my code on it, it crashes. But only if i use QDeclarativeView. I don't have any problems running qwidgets. Here is my code and backtrace. Thanks in advance

main.cpp

#include <QApplication>
#include <QDeclarativeView>
#include <QtDeclarative>
#include <QDeclarativeContext>
#include <QWSKeyboardHandler>
#include <QPluginLoader>
#include <QCursor>
#include <QWSServer>
#include <QDebug>
#include "screenupdater.h"
#include <sys/ioctl.h>
#include <QGraphicsColorizeEffect>
#include "oscreen.h"
#include "colorpalette.h"
#include <iostream>
#include <unistd.h>

int main(int argc, char *argv[])
{
    sleep(15);
    std::cout << __LINE__ << std::endl;
    QApplication a(argc, argv);
std::cout << __LINE__ << std::endl;

    std::cout << __LINE__ << std::endl;
    QDeclarativeView* view = new QDeclarativeView;
    std::cout << __LINE__ << std::endl;

    std::cout << __LINE__ << std::endl;

    std::cout << __LINE__ << std::endl;

    std::cout << __LINE__ << std::endl;


    std::cout << __LINE__ << std::endl;

    std::cout << __LINE__ << std::endl;
std::cout << __LINE__ << std::endl;

#if __BOARD__ == __FIRSTBOARD__
std::cout << __LINE__ << std::endl;
    view->setSource(QUrl("qrc:/yahak.qml")); //crashes here
    std::cout << __LINE__ << std::endl;
#elif __BOARD__ == __SECONDBOARD__
    view->setSource(QUrl("qrc:/mainlow.qml"));
#endif
std::cout << __LINE__ << std::endl;

    view->setResizeMode(QDeclarativeView::SizeRootObjectToView);

std::cout << __LINE__ << std::endl;
#ifndef __SIMULATOR__
    view->showFullScreen();
    QWSServer::setCursorVisible(false);
#else

    view->show();
#if __BOARD__ == __FIRSTBOARD__
    view->setFixedSize(840, 480);
#elif __BOARD__ == __SECONDBOARD__
    view->setFixedSize(190, 48);
#endif

#endif
#if __BOARD__ == __SECONDBOARD__
    ScreenUpdater* updater = new ScreenUpdater();
#endif
    std::cout << __LINE__ << std::endl;
    qDebug() << "hi";
    return a.exec();
}

yahak.qml

import QtQuick 1.1

Item {
    width: 1
    height: 1
    Rectangle{anchors.fill: parent; color: "red"}

}

Backtrace

#0  0xb6dcef0c in QDeclarativeCompiledData::TypeReference::metaObject (
    this=this@entry=0x0) at qml/qdeclarativecompileddata.cpp:206
No locals.
#1  0xb6dc2de8 in QDeclarativeCompiler::buildObject (this=0xbe8c2b40, 
    obj=0x312e0, ctxt=...) at qml/qdeclarativecompiler.cpp:737
        tr = <error reading variable>
        objCtxt = {stack = 17, owner = -1098110528, 
          object = 0xb6ec9d58 <QDeclarativeItem::staticMetaObject>}
        type = <optimized out>
        isCustomParser = <optimized out>
        customProps = {{p = {static shared_null = {ref = {_q_value = 377}, 
                alloc = 0, begin = 0, end = 0, sharable = 1, array = {0x0}}, 
              d = 0x0}, d = 0x0}}
        deferredList = {<QList<QString>> = {{p = {static shared_null = {ref = {
                    _q_value = 377}, alloc = 0, begin = 0, end = 0, 
                  sharable = 1, array = {0x0}}, d = 0x1}, 
              d = 0x1}}, <No data fields>}
        defaultProperty = <optimized out>
        skipProperty = <optimized out>
        cp = <optimized out>
#2  0xb6dc6884 in QDeclarativeCompiler::buildListProperty (
    this=this@entry=0xbe8c2b40, prop=prop@entry=0x6c5c0, 
    obj=obj@entry=0x34f68, ctxt=...) at qml/qdeclarativecompiler.cpp:1978
        v = 0x6c570
        ii = 0
        t = <optimized out>
        listType = -1098110640
        listTypeIsInterface = <optimized out>
        assignedBinding = 225
#3  0xb6dc7ed0 in QDeclarativeCompiler::buildProperty (this=this@entry=0xbe8c2b40, prop=prop@entry=0x6c5c0, obj=obj@entry=0x34f68, ctxt=...) at qml/qdeclarativecompiler.cpp:1555
        metaObject = <optimized out>
#4  0xb6dc35b8 in QDeclarativeCompiler::buildObject (this=this@entry=0xbe8c2b40, obj=obj@entry=0x34f68, ctxt=...) at qml/qdeclarativecompiler.cpp:868
        ids = 0
        prop = 0x6c5c0
        canDefer = false
        tr = <optimized out>
        objCtxt = {stack = 0, owner = 0, object = 0x34f68}
        type = <optimized out>
        isCustomParser = 184
        customProps = {{p = {static shared_null = {ref = {_q_value = 377}, alloc = 0, begin = 0, end = 0, sharable = 1, array = {0x0}}, d = 0xb60755d4 <QListData::shared_null>}, d = 0xb60755d4 <QListData::shared_null>}}
        deferredList = {<QList<QString>> = {{p = {static shared_null = {ref = {_q_value = 377}, alloc = 0, begin = 0, end = 0, sharable = 1, array = {0x0}}, d = 0xb60755d4 <QListData::shared_null>}, d = 0xb60755d4 <QListData::shared_null>}}, <No data fields>}
        defaultProperty = 0x6c5c0
        skipProperty = 0xb5b58090 <mp_>
        cp = 0x0
#5  0xb6dc6174 in QDeclarativeCompiler::compileTree (this=0xbe8c2b40, tree=0x34f68) at ../../include/QtDeclarative/private/../../../src/declarative/qml/qdeclarativecompiler_p.h:173
        init = <optimized out>
        importedScripts = <optimized out>
        importedScriptIndexes = <optimized out>
        def = <optimized out>
        _container_ = <optimized out>
        script = <optimized out>
        scriptCode = <optimized out>
        pragmas = <optimized out>
        scriptBlock = <optimized out>
        iter = <optimized out>
        import = <optimized out>
        ii = <optimized out>
#6  0xb6dcb09c in QDeclarativeCompiler::compile (this=0xbe8c2b00, this@entry=0xbe8c2b40, engine=0x53148, unit=0x1, unit@entry=0x65ea8, out=0xffffffff) at qml/qdeclarativecompiler.cpp:622
        resolvedTypes = @0x65f00: {{p = {static shared_null = {ref = {_q_value = 377}, alloc = 0, begin = 0, end = 0, sharable = 1, array = {0x0}}, d = 0x6a7f8}, d = 0x6a7f8}}
        referencedTypes = {{p = {static shared_null = {ref = {_q_value = 377}, alloc = 0, begin = 0, end = 0, sharable = 1, array = {0x0}}, d = 0x6c118}, d = 0x6c118}}
        root = <optimized out>
#7  0xb6de1804 in QDeclarativeTypeData::compile (this=this@entry=0x65ea8) at qml/qdeclarativetypeloader.cpp:1045
        compiler = {compileState = {ids = {{d = 0xb60755a0 <QHashData::shared_null>, e = 0xb60755a0 <QHashData::shared_null>}}, idIndexes = {{d = 0xb60755a0 <QHashData::shared_null>, e = 0xb60755a0 <QHashData::shared_null>}}, parserStatusCount = 1, pushedProperties = 0, compiledBindingData = {static shared_null = {ref = {_q_value = 62}, alloc = 0, size = 0, data = 0xb607559c <QByteArray::shared_null+16> "", array = ""}, static shared_empty = {ref = {_q_value = 3}, alloc = 0, size = 0, data = 0xb6075588 <QByteArray::shared_empty+16> "", array = ""}, d = 0xb607558c <QByteArray::shared_null>}, bindings = {{d = 0xb60755a0 <QHashData::shared_null>, e = 0xb60755a0 <QHashData::shared_null>}}, signalExpressions = {{d = 0xb60755a0 <QHashData::shared_null>, e = 0xb60755a0 <QHashData::shared_null>}}, aliasingObjects = {{p = {static shared_null = {ref = {_q_value = 377}, alloc = 0, begin = 0, end = 0, sharable = 1, array = {0x0}}, d = 0xb60755d4 <QListData::shared_null>}, d = 0xb60755d4 <QListData::shared_null>}}, root = 0x34f68}, componentStat = {lineNumber = 3, ids = 0, scriptBindings = {{p = {static shared_null = {ref = {_q_value = 377}, alloc = 0, begin = 0, end = 0, sharable = 1, array = {0x0}}, d = 0xb60755d4 <QListData::shared_null>}, d = 0xb60755d4 <QListData::shared_null>}}, optimizedBindings = {{p = {static shared_null = {ref = {_q_value = 377}, alloc = 0, begin = 0, end = 0, sharable = 1, array = {0x0}}, d = 0xb60755d4 <QListData::shared_null>}, d = 0xb60755d4 <QListData::shared_null>}}, objects = 2}, savedCompileStates = {{d = 0xb60755a0 <QHashData::shared_null>, e = 0xb60755a0 <QHashData::shared_null>}}, savedComponentStats = {{p = {static shared_null = {ref = {_q_value = 377}, alloc = 0, begin = 0, end = 0, sharable = 1, array = {0x0}}, d = 0xb60755d4 <QListData::shared_null>}, d = 0xb60755d4 <QListData::shared_null>}}, exceptions = {{p = {static shared_null = {ref = {_q_value = 377}, alloc = 0, begin = 0, end = 0, sharable = 1, array = {0x0}}, d = 0xb60755d4 <QListData::shared_null>}, d = 0xb60755d4 <QListData::shared_null>}}, output = 0x6a820, engine = 0x3bbb8, enginePrivate = 0x53148, unitRoot = 0x34f68, unit = 0x65ea8}
#8  0xb6de2068 in QDeclarativeTypeData::done (this=0x65ea8) at qml/qdeclarativetypeloader.cpp:963
No locals.
#9  0xb6de0bfc in QDeclarativeDataBlob::tryDone (this=0xb6de0bfc <QDeclarativeDataBlob::tryDone()+92>) at qml/qdeclarativetypeloader.cpp:414
No locals.
#10 QDeclarativeDataBlob::tryDone (this=0xb6de0bfc <QDeclarativeDataBlob::tryDone()+92>) at qml/qdeclarativetypeloader.cpp:407
No locals.
#11 0xb6de23d4 in QDeclarativeDataLoader::load (this=this@entry=0x53224, blob=blob@entry=0x65ea8) at qml/qdeclarativetypeloader.cpp:546
        data = {static shared_null = {ref = {_q_value = 62}, alloc = 0, size = 0, data = 0xb607559c <QByteArray::shared_null+16> "", array = ""}, static shared_empty = {ref = {_q_value = 3}, alloc = 0, size = 0, data = 0xb6075588 <QByteArray::shared_empty+16> "", array = ""}, d = 0x3f480}
        file = {<QIODevice> = {<QObject> = {_vptr.QObject = 0xb6072010 <vtable for QFile+8>, static staticMetaObject = {d = {superdata = 0x0, stringdata = 0xb5fd8a68 <qt_meta_stringdata_QObject> "QObject", data = 0xb5fd8b3c <qt_meta_data_QObject>, extradata = 0xb606d3cc <QObject::staticMetaObjectExtraData>}}, static staticMetaObjectExtraData = {objects = 0x0, static_metacall = 0xb5f1657c <QObject::qt_static_metacall(QObject*, QMetaObject::Call, int, void**)>}, d_ptr = {d = 0x31ba8}, static staticQtMetaObject = {d = {superdata = 0x0, stringdata = 0xb60490b4 <qt_meta_stringdata_Qt> "Qt", data = 0xb604c9b8 <qt_meta_data_Qt>, extradata = 0x0}}}, static staticMetaObject = {d = {superdata = 0x27d78 <QObject::staticMetaObject>, stringdata = 0xb60518f0 <qt_meta_stringdata_QIODevice> "QIODevice", data = 0xb6051954 <qt_meta_data_QIODevice>, extradata = 0xb6070634 <QIODevice::staticMetaObjectExtraData>}}, static staticMetaObjectExtraData = {objects = 0x0, static_metacall = 0xb5f5bb58 <QIODevice::qt_static_metacall(QObject*, QMetaObject::Call, int, void**)>}}, static staticMetaObject = {d = {superdata = 0xb6072118 <QIODevice::staticMetaObject>, stringdata = 0xb60518a4 <qt_meta_stringdata_QFile> "QFile", data = 0xb60518b4 <qt_meta_data_QFile>, extradata = 0xb607062c <QFile::staticMetaObjectExtraData>}}, static staticMetaObjectExtraData = {objects = 0x0, static_metacall = 0xb5f5b9f4 <QFile::qt_static_metacall(QObject*, QMetaObject::Call, int, void**)>}}
        lf = {static null = {<No data fields>}, static shared_null = {ref = {_q_value = 285}, alloc = 0, size = 0, data = 0xb607565e <QString::shared_null+18>, clean = 0, simpletext = 0, righttoleft = 0, asciiCache = 0, capacity = 0, reserved = 0, array = {0}}, static shared_empty = {ref = {_q_value = 8}, alloc = 0, size = 0, data = 0xb607564a <QString::shared_empty+18>, clean = 0, simpletext = 0, righttoleft = 0, asciiCache = 0, capacity = 0, reserved = 0, array = {0}}, d = 0x66038, static codecForCStrings = 0x0}
#12 0xb6de2650 in QDeclarativeTypeLoader::get (this=0x53224, url=...) at qml/qdeclarativetypeloader.cpp:712
        typeData = 0x65ea8
#13 0xb6daafd8 in QDeclarativeComponent::loadUrl (this=this@entry=0x64748, url=...) at ../../include/QtCore/../../src/corelib/global/qglobal.h:2580
        d = 0x313d8
        data = <optimized out>
#14 0xb6dab280 in QDeclarativeComponent::QDeclarativeComponent (this=0x64748, engine=0x3bbb8, url=..., parent=0x3d9e0) at qml/qdeclarativecomponent.cpp:437
        d = <optimized out>
        d = <optimized out>
#15 0xb6cc7274 in QDeclarativeViewPrivate::execute (this=0x458d8) at util/qdeclarativeview.cpp:173
        q = 0x3d9e0
#16 0x00011bcc in main (argc=1, argv=0xbe8c2e74) at ../deneme/main.cpp:43
        a = {<QCoreApplication> = {<QObject> = {_vptr.QObject = 0xb699a570 <vtable for QApplication+8>, static staticMetaObject = {d = {superdata = 0x0, stringdata = 0xb5fd8a68 <qt_meta_stringdata_QObject> "QObject", data = 0xb5fd8b3c <qt_meta_data_QObject>, extradata = 0xb606d3cc <QObject::staticMetaObjectExtraData>}}, static staticMetaObjectExtraData = {objects = 0x0, static_metacall = 0xb5f1657c <QObject::qt_static_metacall(QObject*, QMetaObject::Call, int, void**)>}, d_ptr = {d = 0x2fbe8}, static staticQtMetaObject = {d = {superdata = 0x0, stringdata = 0xb60490b4 <qt_meta_stringdata_Qt> "Qt", data = 0xb604c9b8 <qt_meta_data_Qt>, extradata = 0x0}}}, static staticMetaObject = {d = {superdata = 0x27d78 <QObject::staticMetaObject>, stringdata = 0xb60528f8 <qt_meta_stringdata_QCoreApplication> "QCoreApplication", data = 0xb6052994 <qt_meta_data_QCoreApplication>, extradata = 0xb60706bc <QCoreApplication::staticMetaObjectExtraData>}}, static staticMetaObjectExtraData = {objects = 0x0, static_metacall = 0xb5f5d3b8 <QCoreApplication::qt_static_metacall(QObject*, QMetaObject::Call, int, void**)>}, static self = 0xbe8c2d00}, static staticMetaObject = {d = {superdata = 0xb60728f4 <QCoreApplication::staticMetaObject>, stringdata = 0xb68b1c3c <qt_meta_stringdata_QApplication> "QApplication", data = 0xb68b1e24 <qt_meta_data_QApplication>, extradata = 0xb698f800 <QApplication::staticMetaObjectExtraData>}}, static staticMetaObjectExtraData = {objects = 0x0, static_metacall = 0xb62f14f4 <QApplication::qt_static_metacall(QObject*, QMetaObject::Call, int, void**)>}}
        view = 0x3d9e0

qmake.conf

#

# qmake configuration for building with arm-none-linux-gnueabi-g++

#



include(../../common/linux.conf)

include(../../common/gcc-base-unix.conf)

include(../../common/g++-unix.conf)

include(../../common/qws.conf)



# modifications to g++.conf

QMAKE_CC                = arm-dspg-linux-gnueabi-gcc

QMAKE_CXX               = arm-dspg-linux-gnueabi-g++

QMAKE_LINK              = arm-dspg-linux-gnueabi-g++

QMAKE_LINK_SHLIB        = arm-dspg-linux-gnueabi-g++



# modifications to linux.conf

QMAKE_AR                = arm-dspg-linux-gnueabi-ar cqs

QMAKE_OBJCOPY           = arm-dspg-linux-gnueabi-objcopy

QMAKE_STRIP             = arm-dspg-linux-gnueabi-strip



# my modifications



QMAKE_CFLAGS           += -g -funwind-tables -Wp,-D_FORTIFY_SOURCE=2 -fstack-protector --param=ssp-buffer-size=4 -Wformat -Wformat-security -fmessage-length=0 -mfpu=neon -mfloat-abi=softfp -mcpu=cortex-a9 -mtune=cortex-a9 -fno-strict-aliasing -rdynamic -funwind-tables -mno-long-calls -fPIC -fsigned-char -D__SOFTFP__ -std=gnu++98

QMAKE_CXXFLAGS         += $$QMAKE_CFLAGS -fno-exceptions $(CXXFLAGS_QT_WARN)



load(qt_config)

mertcanozdemir

I found the solution. The problem was gcc 9 and foreach implementation in qt 4. If anyone encounters this problem you need to apply cxx11 and gcc9-qforeach patches from this link and compile qt without -std=gnu++98 flag
http://git.pld-linux.org/gitweb.cgi?p=packages/qt4.git;a=commitdiff;h=b42b0c7fae8860fc46b9a9f4d937f4d8066f2daf#patch1