On Thursday, 15. April 2010 13:45:32 Milian Wolff wrote: > Hey all! > > When I try to profile the whole startup of KDevelop using callgrind, I and > at least one of the other developers, get a reproducible segfault. This > does not occur in memcheck or massif, so I fear it shows a bug in > callgrind itself. > > How does one debug that? gdb -> valgrind -> app? > > That segfaults even earlier and gives a totally useless backtrace without > any debug info...
On debian squeeze I get a nicer debug info: $ valgrind --tool=callgrind --instr-atstart=no kdevelop -s profile ==12999== Callgrind, a call-graph generating cache profiler ==12999== Copyright (C) 2002-2009, and GNU GPL'd, by Josef Weidendorfer et al. ==12999== Using Valgrind-3.5.0-Debian and LibVEX; rerun with -h for copyright info ==12999== Command: kdevelop -s profile ==12999== ==12999== For interactive control, run 'callgrind_control -h'. Calling appendChild() on a null node does nothing. Calling appendChild() on a null node does nothing. Calling appendChild() on a null node does nothing. Calling appendChild() on a null node does nothing. Calling appendChild() on a null node does nothing. (none) Callgrind: threads.c:246 (vgCallgrind_post_signal): Assertion 'tid == vgCallgrind_current_tid' failed. ==12999== at 0x3801D7DD: report_and_quit (m_libcassert.c:145) ==12999== by 0x3801DA8E: vgPlain_assert_fail (m_libcassert.c:217) ==12999== by 0x3801AF3C: vgCallgrind_post_signal (threads.c:246) ==12999== by 0x3805A745: vgPlain_sigframe_destroy (sigframe-x86- linux.c:723) ==12999== by 0x3808BF69: vgSysWrap_x86_linux_sys_sigreturn_before (syswrap- x86-linux.c:989) ==12999== by 0x3805BBEA: vgPlain_client_syscall (syswrap-main.c:1392) ==12999== by 0x38058142: handle_syscall (scheduler.c:872) ==12999== by 0x38059280: vgPlain_scheduler (scheduler.c:1068) ==12999== by 0x38085CB8: run_a_thread_NORETURN (syswrap-linux.c:91) sched status: running_tid=1 Thread 1: status = VgTs_Runnable ==12999== at 0x6341291: ??? (syscall-template.S:82) ==12999== by 0x550967D: select_msecs(int, fd_set*, fd_set*, int) (qprocess_unix.cpp:888) ==12999== by 0x550A75D: QProcessPrivate::waitForFinished(int) (qprocess_unix.cpp:1104) ==12999== by 0x54C6A8D: QProcess::waitForFinished(int) (qprocess.cpp:1698) ==12999== by 0xB2FCFA2: qtDocsLocation(QString const&) (qthelpplugin.cpp:52) ==12999== by 0xB2FE33D: QtHelpPlugin::QtHelpPlugin(QObject*, QList<QVariant> const&) (qthelpplugin.cpp:84) ==12999== by 0xB300BC8: QObject* KPluginFactory::createInstance<QtHelpPlugin, QObject>(QWidget*, QObject*, QList<QVariant> const&) (kpluginfactory.h:461) ==12999== by 0x424D7ED: KPluginFactory::create(char const*, QWidget*, QObject*, QList<QVariant> const&, QString const&) (kpluginfactory.cpp:191) ==12999== by 0x432AD8A: KDevelop::IPlugin* KPluginFactory::create<KDevelop::IPlugin>(QWidget*, QObject*, QString const&, QList<QVariant> const&) (kpluginfactory.h:515) ==12999== by 0x432A8A1: KDevelop::IPlugin* KService::createInstance<KDevelop::IPlugin>(QWidget*, QObject*, QList<QVariant> const&, QString*) const (kservice.h:517) ==12999== by 0x4329F38: KDevelop::IPlugin* KServiceTypeTrader::createInstanceFromQuery<KDevelop::IPlugin>(QString const&, QWidget*, QObject*, QString const&, QList<QVariant> const&, QString*) (kservicetypetrader.h:184) ==12999== by 0x4329210: KDevelop::IPlugin* KServiceTypeTrader::createInstanceFromQuery<KDevelop::IPlugin>(QString const&, QString const&, QObject*, QList<QVariant> const&, QString*) (kservicetypetrader.h:157) ==12999== by 0x43259BC: KDevelop::PluginController::loadPluginInternal(QString const&) (plugincontroller.cpp:436) ==12999== by 0x432697B: KDevelop::PluginController::allPluginsForExtension(QString const&, QStringList const&) (plugincontroller.cpp:577) ==12999== by 0x4379F18: KDevelop::DocumentationController::documentationProviders() const (documentationcontroller.cpp:124) ==12999== by 0x437C64D: ProvidersModel::ProvidersModel(QObject*) (documentationview.cpp:42) ==12999== by 0x437BA3E: DocumentationView::DocumentationView(QWidget*) (documentationview.cpp:98) ==12999== by 0x437A543: DocumentationViewFactory::create(QWidget*) (documentationcontroller.cpp:47) ==12999== by 0x43325B8: KDevelop::UiToolViewFactory::create(Sublime::ToolDocument*, QWidget*) (uicontroller.cpp:150) ==12999== by 0x69E7C64: Sublime::ToolDocument::createViewWidget(QWidget*) (tooldocument.cpp:60) ==12999== by 0x69E8120: Sublime::View::createWidget(QWidget*) (view.cpp:90) ==12999== by 0x69E809D: Sublime::View::widget(QWidget*) (view.cpp:82) ==12999== by 0x69ED846: Sublime::IdealMainWidget::addView(Qt::DockWidgetArea, Sublime::View*) (ideal.cpp:622) ==12999== by 0x69E0695: Sublime::MainWindowPrivate::IdealToolViewCreator::operator()(Sublime::View*, Sublime::Position) (mainwindow_p.cpp:190) ==12999== by 0x69E5496: void Sublime::Area::walkToolViews<Sublime::MainWindowPrivate::IdealToolViewCreator>(Sublime::MainWindowPrivate::IdealToolViewCreator&, QFlags<Sublime::Position>) (areawalkers.h:59) ==12999== by 0x69E26B5: Sublime::MainWindowPrivate::toolViewAdded(Sublime::View*, Sublime::Position) (mainwindow_p.cpp:542) ==12999== by 0x69DB798: Sublime::MainWindow::qt_metacall(QMetaObject::Call, int, void**) (mainwindow.moc:126) ==12999== by 0x431C3F4: KDevelop::MainWindow::qt_metacall(QMetaObject::Call, int, void**) (mainwindow.moc:90) ==12999== by 0x5535809: QMetaObject::metacall(QObject*, QMetaObject::Call, int, void**) (qmetaobject.cpp:237) ==12999== by 0x55441DA: QMetaObject::activate(QObject*, QMetaObject const*, int, void**) (qobject.cpp:3295) ==12999== by 0x69CAB1A: Sublime::Area::toolViewAdded(Sublime::View*, Sublime::Position) (area.moc:136) ==12999== by 0x69C9008: Sublime::Area::addToolView(Sublime::View*, Sublime::Position) (area.cpp:239) ==12999== by 0x4330DC4: KDevelop::UiController::addToolViewToArea(KDevelop::IToolViewFactory*, Sublime::ToolDocument*, Sublime::Area*) (uicontroller.cpp:593) ==12999== by 0x432F4B1: KDevelop::UiController::addToolView(QString const&, KDevelop::IToolViewFactory*) (uicontroller.cpp:323) ==12999== by 0x43799AC: KDevelop::DocumentationController::initialize() (documentationcontroller.cpp:67) ==12999== by 0x432C6B0: KDevelop::CorePrivate::initialize(KDevelop::Core::Setup, QString const&) (core.cpp:212) ==12999== by 0x432CC21: KDevelop::Core::initialize(KSplashScreen*, KDevelop::Core::Setup, QString const&) (core.cpp:241) ==12999== by 0x804F8F3: main (main.cpp:269) Thread 2: status = VgTs_WaitSys ==12999== at 0x6D0D482: pthread_cond_timedwait@@GLIBC_2.3.2 (pthread_cond_timedwait.S:180) ==12999== by 0x37888D7F: ??? Thread 3: status = VgTs_WaitSys ==12999== at 0x63391DB: ??? (syscall-template.S:82) ==12999== by 0xC5416D6: ??? (in /usr/lib/libsqlite3.so.0.8.6) ==12999== by 0xC5429F6: ??? (in /usr/lib/libsqlite3.so.0.8.6) ==12999== by 0xB30CB75: QSQLiteDriver::open(QString const&, QString const&, QString const&, QString const&, int, QString const&) (qsql_sqlite.cpp:533) ==12999== by 0xC3E4690: QSqlDatabase::open() (qsqldatabase.cpp:842) ==12999== by 0xB34ED99: QHelpDBReader::init() (qhelpdbreader.cpp:94) ==12999== by 0xB355924: QHelpContentProvider::run() (qhelpcontentwidget.cpp:268) ==12999== by 0x5433FAD: QThreadPrivate::start(void*) (qthread_unix.cpp:248) ==12999== by 0x6D08954: start_thread (pthread_create.c:300) ==12999== by 0x634810D: clone (clone.S:130) Thread 4: status = VgTs_Yielding ==12999== at 0x63391DB: ??? (syscall-template.S:82) ==12999== by 0xC52575C: ??? (in /usr/lib/libsqlite3.so.0.8.6) ==12999== by 0xC525863: ??? (in /usr/lib/libsqlite3.so.0.8.6) ==12999== by 0xC525FDE: ??? (in /usr/lib/libsqlite3.so.0.8.6) ==12999== by 0xC526041: ??? (in /usr/lib/libsqlite3.so.0.8.6) ==12999== by 0xC52B587: ??? (in /usr/lib/libsqlite3.so.0.8.6) ==12999== by 0xC5755A3: ??? (in /usr/lib/libsqlite3.so.0.8.6) ==12999== by 0xC55C0B7: sqlite3_step (in /usr/lib/libsqlite3.so.0.8.6) ==12999== by 0xC562DE9: sqlite3_exec (in /usr/lib/libsqlite3.so.0.8.6) ==12999== by 0xC563A3B: ??? (in /usr/lib/libsqlite3.so.0.8.6) ==12999== by 0xC563C30: ??? (in /usr/lib/libsqlite3.so.0.8.6) ==12999== by 0xC564039: ??? (in /usr/lib/libsqlite3.so.0.8.6) ==12999== by 0xC568012: ??? (in /usr/lib/libsqlite3.so.0.8.6) ==12999== by 0xC56824D: ??? (in /usr/lib/libsqlite3.so.0.8.6) ==12999== by 0xC50C2BF: ??? (in /usr/lib/libsqlite3.so.0.8.6) ==12999== by 0xC50E60A: ??? (in /usr/lib/libsqlite3.so.0.8.6) ==12999== by 0xC547257: ??? (in /usr/lib/libsqlite3.so.0.8.6) ==12999== by 0xC556B5F: ??? (in /usr/lib/libsqlite3.so.0.8.6) ==12999== by 0xC55960B: ??? (in /usr/lib/libsqlite3.so.0.8.6) ==12999== by 0xC55B508: ??? (in /usr/lib/libsqlite3.so.0.8.6) ==12999== by 0xC55B6E5: ??? (in /usr/lib/libsqlite3.so.0.8.6) ==12999== by 0xC55B80A: ??? (in /usr/lib/libsqlite3.so.0.8.6) ==12999== by 0xB30D332: QSQLiteResult::prepare(QString const&) (qsql_sqlite.cpp:327) ==12999== by 0xB30A628: QSQLiteResult::reset(QString const&) (qsql_sqlite.cpp:311) ==12999== by 0xC3E339F: QSqlQuery::exec(QString const&) (qsqlquery.cpp:374) ==12999== by 0xB34F261: QHelpDBReader::indicesForFilter(QStringList const&) const (qhelpdbreader.cpp:270) ==12999== by 0xB358D2B: QHelpIndexProvider::run() (qhelpindexwidget.cpp:178) ==12999== by 0x5433FAD: QThreadPrivate::start(void*) (qthread_unix.cpp:248) ==12999== by 0x6D08954: start_thread (pthread_create.c:300) ==12999== by 0x634810D: clone (clone.S:130) Thread 5: status = VgTs_WaitSys ==12999== at 0x63391DB: ??? (syscall-template.S:82) ==12999== by 0x5433FAD: QThreadPrivate::start(void*) (qthread_unix.cpp:248) ==12999== by 0x6D08954: start_thread (pthread_create.c:300) ==12999== by 0x634810D: clone (clone.S:130) Note: see also the FAQ in the source distribution. It contains workarounds to several common problems. In particular, if Valgrind aborted or crashed after identifying problems in your program, there's a good chance that fixing those problems will prevent Valgrind aborting or crashing, especially if it happened in m_mallocfree.c. If that doesn't help, please report this bug to: www.valgrind.org In the bug report, send all the above text, the valgrind version, and what OS and version you are using. Thanks. ~~~~~~ Can someone do anything with that? -- Milian Wolff [email protected] http://milianw.de
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