Just from a gut feeling I'd say this is the typical Qt4/Qt5 problem. Somewhere you have a plugin or lib, which links against qt4, but which is also used by your qt5 program. This is a sure recipe for unexplainable seg faults.
Guido On Tue, 9 Sep 2014 08:32:51 +0200 "Niels Becker" <[email protected]> wrote: > Hello everybody, > > first of all I am not sure if this is a bug or a configuration / hardware > issuse. > > My machine is a virtual headless server with > 2 GB Ram > Single Core CPU > Ubuntu x64 14.04.1 LTS > Xvfb Display > > I tried to install precompiled Qt Libararies from the website (5.3.1). > After I click on Next, it craches with Segmentation fault. Same with > precompiled Qt-Creator. > > I also tried to use pre build package from apt (5.2.1). > but from this installation I could not start Qt-Creator (3.0.1). > When I build from Source (5.3.1), Qt-Creator (3.2.0) is able to start but > craches when I try to open a project. > Interesting is that my project compiles and runs without any problems. Build > Configuration: ./configure -developer-build -opensource -nomake examples > -nomake tests -prefix /usr/local/Qt-5.3.1 -qt-xcb > > I have read many topics but did not find a solution. > It has probably something to do with memory allocation. > > I was not able to debug qtcreator because gdb threw segmentation fault, too. > Here is a gdb trace of the setup: > > gdb qt-opensource-linux-x64-5.3.1.run > GNU gdb (Ubuntu 7.7-0ubuntu3.1) 7.7 > This GDB was configured as “x86_64-linux-gnu”. > Reading symbols from qt-opensource-linux-x64-5.3.1.run…(no debugging symbols > found)…done. > (gdb) run > Starting program: /home/niels/qt/qt-opensource-linux-x64-5.3.1.run > [Thread debugging using libthread_db enabled] > Using host libthread_db library “/lib/x86_64-linux-gnu/libthread_db.so.1”. > [New Thread 0×7ffff3678700 (LWP 1913)] > [New Thread 0×7ffff2bc1700 (LWP 1914)] > > Program received signal SIGSEGV, Segmentation fault. > 0×0000000000662223 in QTJSC::ExecutablePool::systemAlloc(unsigned long) () > > (gdb) where > #0 0×0000000000662223 in QTJSC::ExecutablePool::systemAlloc(unsigned long) () > #1 0×00000000006b02e3 in QTJSC::JSGlobalData::JSGlobalData(bool) () > #2 0×00000000006b0a6c in QTJSC::JSGlobalData::create() () > #3 0×0000000000611927 in QScriptEnginePrivate::QScriptEnginePrivate() () > #4 0×00000000006127fe in QScriptEngine::QScriptEngine(QObject*) () > #5 0×00000000004a9cb8 in > QInstaller::ScriptEngine::ScriptEngine(QInstaller::PackageManagerCore*) () > #6 0×0000000000455d9c in > QInstaller::PackageManagerCorePrivate::componentScriptEngine() const () > #7 0×000000000049a5f9 in QInstaller::Component::loadComponentScript(QString > const&) () > #8 0×000000000049b9bc in QInstaller::Component::loadComponentScript() () > #9 0×0000000000468e66 in > QInstaller::PackageManagerCorePrivate::buildComponentTree(QHash<QString, > QInstaller::Component*>&, bool) () > #10 0×000000000044a62e in > QInstaller::PackageManagerCore::fetchAllPackages(QList<KDUpdater::Update*> > const&, QHash<QString, KDUpdater::PackageInfo> const&) () > #11 0×000000000045032e in > QInstaller::PackageManagerCore::fetchRemotePackagesTree() () > #12 0×000000000042d0f1 in IntroductionPageImpl::validatePage() () > #13 0×0000000000d4a8c7 in QWizard::next() () > […] > > last lines of strace qt-opensource-linux-x64-5.3.1.run > mmap(NULL, 2147483648, > PROT_READ|PROT_WRITE|PROT_EXEC,MAP_PRIVATE|MAP_ANONYMOUS|MAP_NORESERVE, > -1, 0) = -1 ENOMEM(Cannot allocate memory) —- SIGSEGV {si_signo=SIGSEGV, > si_code=SEGV_MAPERR, si_addr=0xbbadbeef} —- > +++ killed by SIGSEGV (core dumped) +++ > > Why does it try to allocate 2GB memory ? > > strace qtcreator (own build) > […] > stat(”/home/niels/qt/qt-creator-opensource-src-3.2.0/share/qtcreator/qml-type-descriptions/qbs-bundle.json”, > {st_mode=S_IFREG|0644, st_size=305, …}) = 0 > open(”/home/niels/qt/qt-creator-opensource-src-3.2.0/share/qtcreator/qml-type-descriptions/qbs-bundle.json”, > O_RDONLY|O_CLOEXEC) = 18 > fcntl(18, F_SETFD, FD_CLOEXEC) = 0 > fstat(18, {st_mode=S_IFREG|0644, st_size=305, …}) = 0 > fstat(18, {st_mode=S_IFREG|0644, st_size=305, …}) = 0 > fstat(18, {st_mode=S_IFREG|0644, st_size=305, …}) = 0 > read(18, “{\n \“name\”: \“qbs\”,\n \“search”…, > 16384) = 305 > read(18, “”, 16079) = 0 > mmap(NULL, 2147483648, > PROT_READ|PROT_WRITE|PROT_EXEC,MAP_PRIVATE|MAP_ANONYMOUS|MAP_NORESERVE, > -1, 0) = -1 ENOMEM(Cannot allocate memory) > —- SIGSEGV {si_signo=SIGSEGV, si_code=SEGV_MAPERR, si_addr=0xbbadbeef} —- > +++ killed by SIGSEGV (core dumped) +++ > > Again 2GB ? > > strace qtcreator (repository) [...] openat(AT_FDCWD, “/”, > O_RDONLY|O_NONBLOCK|O_DIRECTORY|O_CLOEXEC) = 17statfs(”/”, > {f_type=0×565a4653, f_bsize=4096, f_blocks=12500000, f_bfree=8499470, > f_bavail=8499470, f_files=250000, f_ffree=61885, f_fsid={-1280375273, > -1264953772}, f_namelen=255, f_frsize=4096}) = 0 getdents(17, /* 27 entries > */, 32768) = 704 getdents(17, /* 0 entries */, 32768) = 0 close(17) = 0 > openat(AT_FDCWD, “/qch”, > O_RDONLY|O_NONBLOCK|O_DIRECTORY|O_CLOEXEC) = -1 ENOENT (No > such file or directory) clock_gettime(CLOCK_MONOTONIC, {2608050, 303164993}) > = 0 poll([{fd=3, events=POLLIN|POLLOUT}], 1, 4294967295) = 1 ([{fd=3, > revents=POLLOUT}]) writev(3, > [{”\17\0\2\0\17\0\0\1”, 8}], 1) = 8 > futex(0×200f0e8, FUTEX_WAKE_PRIVATE, 1) = 1 futex(0×7fff12a438c0, > FUTEX_WAKE_PRIVATE, 1) = 1 futex(0×7fff12a438c4, FUTEX_WAIT_PRIVATE, 1, NULL) > = -1 EAGAIN (Resource temporarily unavailable) futex(0×200f0e8, > FUTEX_WAKE_PRIVATE, 1) = 0 write(5, > “\1\0\0\0\0\0\0\0”, 8) = 8 write(5, > “\1\0\0\0\0\0\0\0”, 8) = 8 —- SIGSEGV > {si_signo=SIGSEGV, si_code=SEGV_ACCERR, si_addr=0×7f075044c000} —- +++ killed > by SIGSEGV (core dumped) +++ > > I hope you can help me or at least provide a workaround for qtcreator. > > Kind Regards Niels _______________________________________________ Qt-creator mailing list [email protected] http://lists.qt-project.org/mailman/listinfo/qt-creator
