Thread: Fwd: Re: Multi-threaded user app segfaults when using libpq with separate connections
Fwd: Re: Multi-threaded user app segfaults when using libpq with separate connections
From
Frank van Vugt
Date:
> > I've retried this with a cvs-version > > This still resulted in more or less the same kind of errors. > > Are you sure that each thread is accessing only its own PGconn object? As sure as I can be, yes. Run by Qt's main event loop, my code simply creates ten objects of a particular class. The class declares a static mutex, each object starts a single thread in whose lifetime a new database connection is setup, used and destroyed again. So this is something simular to the boss/workers design pattern adapted to Qt's signal/slot mechanism (which explains why I'm using a class object per additional thread). Looking at Qt's code it seems inevitable that a separate PGconn object isused for each and every connection made. I've takenthis problem up withTrollTech first, they are pretty sure it's not caused by their libs. > Other than that, not sure what to suggest. I get the impression that > something is clobbering memory with abandon. Do you have any > Purify-like tools to look for memory stomp problems? I know TrollTech is using Purify, I have Valgrind available. You'll find the output of a run with the option '--trace-pthread=some' attached. FYI, QSqlDatabase::commit() (sql/qsqldatabase.cpp:775) contains:if ( !d->driver->hasFeature( QSqlDriver::Transactions ) ) return FALSE; The parameter is an enum, inside QSqlDriver (the one specific to PostgreSQL), this resolves into a plain:bool QPSQLDriver::hasFeature( DriverFeature f ) const{ switch ( f ) { case Transactions: return TRUE; case QuerySize: return TRUE; case BLOB: return pro >= QPSQLDriver::Version71; case Unicode: return d->isUtf8; default: return FALSE; }} Best, Frank. =+=+=+=+=+=+=+=+=+=+=+=+= ==2028== Memcheck, a.k.a. Valgrind, a memory error detector for x86-linux. ==2028== Copyright (C) 2002, and GNU GPL'd, by Julian Seward. ==2028== Using valgrind-1.9.5pre, a program instrumentation system for x86-linux. ==2028== Copyright (C) 2000-2002, and GNU GPL'd, by Julian Seward. ==2028== Estimated CPU clock rate is 501 MHz ==2028== For more details, rerun with: -v ==2028== --2028-- PTHREAD[1]: pthread_key_create *key 0x41107D40, destr0x41106480 --2028-- PTHREAD[1]: pthread_getspecific_ptr --2028-- PTHREAD[1]: pthread_setspecific_ptr ptr 0x4378C024 --2028-- PTHREAD[1]: pthread_getspecific_ptr*** DELETED MULTIPLE REPETITIONS OF THE SAME MESSAGE --2028-- PTHREAD[1]: pthread_key_validate key 0x0 --2028-- PTHREAD[1]: pthread_getspecific_ptr*** DELETED MULTIPLE REPETITIONS OF THE SAME MESSAGE (SET) ==2028== Syscall param modify_ldt(ptr)(func=1 or 0x11) contains uninitialised or unaddressable byte(s) ==2028== at 0x40FFD898: (within /usr/lib/libGL.so.1.0.4363) ==2028== Address 0xBFFFF120 is on thread 1's stack --2028-- PTHREAD[1]: pthread_key_create *key 0x4102C2A0, destr0x40FFDC64 --2028-- PTHREAD[1]: pthread_getspecific_ptr*** DELETED MULTIPLE REPETITIONS OF THE SAME MESSAGE (SET) --2028-- PTHREAD[1]: pthread_key_validate key 0x1 --2028-- PTHREAD[1]: pthread_getspecific_ptr --2028-- PTHREAD[1]: pthread_key_create *key 0x40C16DA0, destr 0x0 --2028-- PTHREAD[1]: pthread_getspecific_ptr*** DELETED MULTIPLE REPETITIONS OF THE SAME MESSAGE (SET) --2028-- PTHREAD[1]: pthread_key_validate key 0x2 --2028-- PTHREAD[1]: pthread_getspecific_ptr - *** DELETED MULTIPLE REPETITIONS OF THE SAME MESSAGE (SET) ==2028== ==2028== Conditional jump or move depends on uninitialised value(s) ==2028== at 0x40010847: strlen (in /lib/ld-2.3.2.so) ==2028== by 0x4000B312: _dl_signal_cerror (in /lib/ld-2.3.2.so) ==2028== by 0x40006BBE: _dl_lookup_symbol_internal (in /lib/ld-2.3.2.so) ==2028== by 0x40F234F9: do_dlsym (in /lib/libc.so.6) --2028-- PTHREAD[1]: pthread_key_validate key 0x0 --2028-- PTHREAD[1]: pthread_getspecific_ptr --2028-- PTHREAD[1]: pthread_key_validate key 0x0 --2028-- PTHREAD[1]: pthread_getspecific_ptr ==2028== ==2028== Syscall param write(buf) contains uninitialised or unaddressable byte(s) ==2028== at 0x40EE63A8: __GI___libc_write (in /lib/libc.so.6) ==2028== by 0x40C91EBD: _X11TransSocketWrite (in /usr/X11R6/lib/libX11.so.6.2) ==2028== by 0x40C92AFE: _X11TransWrite (in /usr/X11R6/lib/libX11.so.6.2) ==2028== by 0x40C71663: _XFlushInt (in /usr/X11R6/lib/libX11.so.6.2) ==2028== Address 0x4385DC24 is 116 bytes inside a block of size 2048 alloc'd ==2028== at 0x401633BB: calloc (in /usr/lib/valgrind/valgrind.so) ==2028== by 0x40C62736: XOpenDisplay (in /usr/X11R6/lib/libX11.so.6.2) ==2028== by 0x4042FB87: qt_init_internal(int*, char**, _XDisplay*,unsigned long, unsigned long) (kernel/qapplication_x11.cpp:1657) ==2028== by 0x40431AC6: qt_init(int*, char**, QApplication::Type) (kernel/qapplication_x11.cpp:2315) --2028-- PTHREAD[1]: pthread_key_validate key 0x2 --2028-- PTHREAD[1]: pthread_getspecific_ptr*** DELETED MULTIPLE REPETITIONS OF THE SAME MESSAGE (SET) initial print engine constructor reached ==2028== valgrind's libpthread.so: IGNORED call to: pthread_attr_setinheritsched --2028-- PTHREAD[1]: pthread_key_create *key 0xBFFFEF68, destr 0x0 --2028-- PTHREAD[1]: pthread_getspecific_ptr*** DELETED MULTIPLE REPETITIONS OF THE SAME MESSAGE (SET) --2028-- PTHREAD[1]: pthread_key_create *key 0xBFFFEF68, destr 0x0 --2028-- PTHREAD[1]: pthread_getspecific_ptr*** DELETED MULTIPLE REPETITIONS OF THE SAME MESSAGE (SET) --2028-- PTHREAD[1]: pthread_key_create *key 0xBFFFEF68, destr 0x0 --2028-- PTHREAD[1]: pthread_getspecific_ptr*** DELETED MULTIPLE REPETITIONS OF THE SAME MESSAGE (SET) --2028-- PTHREAD[1]: pthread_key_create *key 0xBFFFEF68, destr 0x0 --2028-- PTHREAD[1]: pthread_getspecific_ptr*** DELETED MULTIPLE REPETITIONS OF THE SAME MESSAGE (SET) --2028-- PTHREAD[1]: pthread_key_create *key 0xBFFFEF68, destr 0x0 --2028-- PTHREAD[1]: pthread_getspecific_ptr*** DELETED MULTIPLE REPETITIONS OF THE SAME MESSAGE (SET) --2028-- PTHREAD[1]: pthread_key_create *key 0xBFFFEF68, destr 0x0 --2028-- PTHREAD[1]: pthread_getspecific_ptr*** DELETED MULTIPLE REPETITIONS OF THE SAME MESSAGE (SET) --2028-- PTHREAD[1]: pthread_key_create *key 0xBFFFEF68, destr 0x0 --2028-- PTHREAD[1]: pthread_getspecific_ptr*** DELETED MULTIPLE REPETITIONS OF THE SAME MESSAGE (SET) ==2028== valgrind's libpthread.so: IGNORED call to: pthread_attr_destroy --2028-- PTHREAD[2]: pthread_key_validate key 0x2 --2028-- PTHREAD[2]: pthread_getspecific_ptr --2028-- PTHREAD[2]: pthread_setspecific_ptr ptr 0x443F7BA0 print thread run() reached, thread halted --2028-- PTHREAD[2]: pthread_cond_wait cv 0x4382FC18, mx 0x45113E10: BLOCK ==2028== ==2028== Syscall param write(buf) contains uninitialised or unaddressable byte(s) ==2028== at 0x40EE63A8: __GI___libc_write (in /lib/libc.so.6) ==2028== by 0x410FDD9D: _IceTransSocketWrite (in /usr/X11R6/lib/libICE.so.6.3) ==2028== by 0x410FEB6E: _IceTransWrite (in /usr/X11R6/lib/libICE.so.6.3) ==2028== by 0x410F554A: _IceWrite (in /usr/X11R6/lib/libICE.so.6.3) ==2028== Address 0x438739E8 is 12 bytes inside a block of size 1024alloc'd ==2028== at 0x401633BB: calloc (in /usr/lib/valgrind/valgrind.so)==2028== by 0x410F24A6: IceOpenConnection (in/usr/X11R6/lib/libICE.so.6.3) ==2028== by0x410E73A0: SmcOpenConnection(in /usr/X11R6/lib/libSM.so.6.0) ==2028== by 0x4043AF43:QSessionManager::QSessionManager(QApplication*,QString&, QString&)(kernel/qapplication_x11.cpp:6183) --2028-- PTHREAD[2]: pthread_cond_signal cv 0x4382FC18: RESUME with mx 0x45113E10 new print engine created ==2028== valgrind's libpthread.so: IGNORED call to: pthread_attr_setinheritsched ==2028== valgrind's libpthread.so: IGNORED call to: pthread_attr_destroy new print engine created ==2028== valgrind's libpthread.so: IGNORED call to: pthread_attr_setinheritsched ==2028== valgrind's libpthread.so: IGNORED call to: pthread_attr_destroy print thread continued trying to lock my_active in order to add/open a database my_active has been locked in order to add/open database connection (08:04:27.670) ==2028== ==2028== Thread 2: ==2028== Conditional jump or move depends on uninitialised value(s) ==2028== at 0x40010606: strchr (in /lib/ld-2.3.2.so) --2028-- PTHREAD[3]: pthread_mutex_lock mx 0x40D15688: BLOCK --2028-- PTHREAD[4]: pthread_mutex_lock mx 0x40D15688: BLOCK new print engine created new print engine created new print engine created new print engine created new print engine created new print engine created new print engine created --2028-- PTHREAD[3]: pthread_mutex_lock mx 0x40D15688: RESUME --2028-- PTHREAD[4]: pthread_mutex_lock mx 0x40D15688: RESUME --2028-- PTHREAD[3]: pthread_key_validate key 0x2 --2028-- PTHREAD[3]: pthread_getspecific_ptr --2028-- PTHREAD[3]: pthread_setspecific_ptr ptr 0x443C6A78 print thread run() reached, thread halted --2028-- PTHREAD[3]: pthread_cond_wait cv 0x4382FC18, mx 0x45433E10: BLOCK --2028-- PTHREAD[4]: pthread_key_validate key 0x2 --2028-- PTHREAD[4]: pthread_getspecific_ptr --2028-- PTHREAD[4]: pthread_setspecific_ptr ptr 0x443C36F4 print thread run() reached, thread halted --2028-- PTHREAD[4]: pthread_cond_wait cv 0x4382FC18, mx 0x45665E10: BLOCK --2028-- PTHREAD[5]: pthread_key_validate key 0x2 --2028-- PTHREAD[5]: pthread_getspecific_ptr --2028-- PTHREAD[5]: pthread_setspecific_ptr ptr 0x443C6B70 print thread run() reached, thread halted --2028-- PTHREAD[5]: pthread_cond_wait cv 0x4382FC18, mx 0x458FBE10: BLOCK --2028-- PTHREAD[6]: pthread_key_validate key 0x2 --2028-- PTHREAD[6]: pthread_getspecific_ptr --2028-- PTHREAD[6]: pthread_setspecific_ptr ptr 0x443C37EC print thread run() reached, thread halted --2028-- PTHREAD[6]: pthread_cond_wait cv 0x4382FC18, mx 0x45B1BE10: BLOCK --2028-- PTHREAD[7]: pthread_key_validate key 0x2 --2028-- PTHREAD[7]: pthread_getspecific_ptr --2028-- PTHREAD[7]: pthread_setspecific_ptr ptr 0x443C6C68 print thread run() reached, thread halted --2028-- PTHREAD[7]: pthread_cond_wait cv 0x4382FC18, mx 0x45D4DE10: BLOCK --2028-- PTHREAD[8]: pthread_key_validate key 0x2 --2028-- PTHREAD[8]: pthread_getspecific_ptr --2028-- PTHREAD[8]: pthread_setspecific_ptr ptr 0x443C38E4 print thread run() reached, thread halted --2028-- PTHREAD[8]: pthread_cond_wait cv 0x4382FC18, mx 0x45F7FE10: BLOCK --2028-- PTHREAD[9]: pthread_key_validate key 0x2 --2028-- PTHREAD[9]: pthread_getspecific_ptr --2028-- PTHREAD[9]: pthread_setspecific_ptr ptr 0x443C6D60 print thread run() reached, thread halted --2028-- PTHREAD[9]: pthread_cond_wait cv 0x4382FC18, mx 0x4619FE10: BLOCK --2028-- PTHREAD[10]: pthread_key_validate key 0x2 --2028-- PTHREAD[10]: pthread_getspecific_ptr --2028-- PTHREAD[10]: pthread_setspecific_ptr ptr 0x443C39DC print thread run() reached, thread halted --2028-- PTHREAD[10]: pthread_cond_wait cv 0x4382FC18, mx 0x464BFE10: BLOCK --2028-- PTHREAD[3]: pthread_cond_signal cv 0x4382FC18: RESUME with mx 0x45433E10 new print engine created --2028-- PTHREAD[4]: pthread_cond_signal cv 0x4382FC18: RESUME with mx 0x45665E10 new print engine created --2028-- PTHREAD[5]: pthread_cond_signal cv 0x4382FC18: RESUME with mx 0x458FBE10 new print engine created --2028-- PTHREAD[6]: pthread_cond_signal cv 0x4382FC18: RESUME with mx 0x45B1BE10 new print engine created --2028-- PTHREAD[7]: pthread_cond_signal cv 0x4382FC18: RESUME with mx 0x45D4DE10 new print engine created --2028-- PTHREAD[2]: pthread_key_validate key 0x2 --2028-- PTHREAD[2]: pthread_getspecific_ptr --2028-- PTHREAD[2]: pthread_key_validate key 0x2 --2028-- PTHREAD[2]: pthread_getspecific_ptr print thread continued trying to lock my_active in order to add/open a database --2028-- PTHREAD[3]: pthread_mutex_lock mx 0x4382FB94: BLOCK print thread continued trying to lock my_active in order to add/open a database --2028-- PTHREAD[4]: pthread_mutex_lock mx 0x4382FB94: BLOCK print thread continued trying to lock my_active in order to add/open a database --2028-- PTHREAD[5]: pthread_mutex_lock mx 0x4382FB94: BLOCK print thread continued trying to lock my_active in order to add/open a database --2028-- PTHREAD[6]: pthread_mutex_lock mx 0x4382FB94: BLOCK print thread continued trying to lock my_active in order to add/open a database --2028-- PTHREAD[7]: pthread_mutex_lock mx 0x4382FB94: BLOCK --2028-- PTHREAD[11]: pthread_key_validate key 0x2 --2028-- PTHREAD[11]: pthread_getspecific_ptr --2028-- PTHREAD[11]: pthread_setspecific_ptr ptr 0x443CDBC8 print thread run() reached, thread halted --2028-- PTHREAD[11]: pthread_cond_wait cv 0x4382FC18, mx 0x4672CE10: BLOCK --2028-- PTHREAD[12]: pthread_key_validate key 0x2 --2028-- PTHREAD[12]: pthread_getspecific_ptr --2028-- PTHREAD[12]: pthread_setspecific_ptr ptr 0x443CFEE4 print thread run() reached, thread halted --2028-- PTHREAD[12]: pthread_cond_wait cv 0x4382FC18, mx 0x4694CE10: BLOCK --2028-- PTHREAD[13]: pthread_key_validate key 0x2 --2028-- PTHREAD[13]: pthread_getspecific_ptr --2028-- PTHREAD[13]: pthread_setspecific_ptr ptr 0x443CDCC0 print thread run() reached, thread halted --2028-- PTHREAD[13]: pthread_cond_wait cv 0x4382FC18, mx 0x46B7EE10: BLOCK --2028-- PTHREAD[14]: pthread_key_validate key 0x2 --2028-- PTHREAD[14]: pthread_getspecific_ptr --2028-- PTHREAD[14]: pthread_setspecific_ptr ptr 0x443CFFDC print thread run() reached, thread halted --2028-- PTHREAD[14]: pthread_cond_wait cv 0x4382FC18, mx 0x46DB0E10: BLOCK --2028-- PTHREAD[15]: pthread_key_validate key 0x2 --2028-- PTHREAD[15]: pthread_getspecific_ptr --2028-- PTHREAD[15]: pthread_setspecific_ptr ptr 0x443CDDB8 print thread run() reached, thread halted --2028-- PTHREAD[15]: pthread_cond_wait cv 0x4382FC18, mx 0x46FE2E10: BLOCK --2028-- PTHREAD[16]: pthread_key_validate key 0x2 --2028-- PTHREAD[16]: pthread_getspecific_ptr --2028-- PTHREAD[16]: pthread_setspecific_ptr ptr 0x443D00D4 print thread run() reached, thread halted --2028-- PTHREAD[16]: pthread_cond_wait cv 0x4382FC18, mx 0x47214E10: BLOCK --2028-- PTHREAD[2]: pthread_key_validate key 0x2 --2028-- PTHREAD[2]: pthread_getspecific_ptr --2028-- PTHREAD[2]: pthread_key_validate key 0x2 --2028-- PTHREAD[2]: pthread_getspecific_ptr trying to unlock my_active since we now have added/opened a database --2028-- PTHREAD[3]: pthread_mutex_lock mx 0x4382FB94: RESUME my_active has been locked after opening database connection (08:08:26.717) --2028-- PTHREAD[2]: pthread_mutex_lock mx 0x441C8ADC: BLOCK my_active has been locked in order to add/open database connection (08:08:26.810) --2028-- PTHREAD[3]: pthread_mutex_lock mx 0x441C8ADC: BLOCK --2028-- PTHREAD[2]: pthread_mutex_lock mx 0x441C8ADC: RESUME --2028-- PTHREAD[1]: pthread_mutex_lock mx 0x441C8ADC: BLOCK --2028-- PTHREAD[1]: pthread_mutex_lock mx 0x441C8ADC: RESUME --2028-- PTHREAD[2]: pthread_key_validate key 0x2 --2028-- PTHREAD[2]: pthread_getspecific_ptr --2028-- PTHREAD[3]: pthread_mutex_lock mx 0x441C8ADC: RESUME --2028-- PTHREAD[1]: pthread_mutex_lock mx 0x441C8ADC: BLOCK --2028-- PTHREAD[1]: pthread_mutex_lock mx 0x441C8ADC: RESUME --2028-- PTHREAD[3]: pthread_mutex_lock mx 0x441C8ADC: BLOCK --2028-- PTHREAD[3]: pthread_mutex_lock mx 0x441C8ADC: RESUME --2028-- PTHREAD[1]: pthread_mutex_lock mx 0x441C8ADC: BLOCK --2028-- PTHREAD[2]: pthread_key_validate key 0x2 --2028-- PTHREAD[2]: pthread_getspecific_ptr --2028-- PTHREAD[1]: pthread_mutex_lock mx 0x441C8ADC: RESUME --2028-- PTHREAD[3]: pthread_key_validate key 0x2 --2028-- PTHREAD[3]: pthread_getspecific_ptr --2028-- PTHREAD[3]: pthread_key_validate key 0x2 --2028-- PTHREAD[3]: pthread_getspecific_ptr ==2028== ==2028== Thread 2: ==2028== Invalid read of size 4 ==2028== at 0x4080597A: QSqlDatabase::commit() (sql/qsqldatabase.cpp:775) ==2028== by 0x8050BAC: PrintEngine::run() (printengine.cpp:118) ==2028== by 0x404A6BF5: QThreadInstance::start(void*) (kernel/qthread_unix.cpp:120) ==2028== by 0x40D0E5C8: thread_wrapper (in/usr/lib/valgrind/libpthread.so) ==2028== Address 0x443F8E8C is 40 bytesinsidea block of size 44 free'd ==2028== at 0x40163266: __builtin_delete(in /usr/lib/valgrind/valgrind.so) ==2028== by 0x40163284: operatordelete(void*) (in /usr/lib/valgrind/valgrind.so) ==2028== by 0x408056A1: QSqlDatabase::~QSqlDatabase() (sql/qsqldatabase.cpp:674) ==2028== by 0x40806D8C: QDict<QSqlDatabase>::deleteItem(void*) (../include/qdict.h:97) ==2028== ==2028== Thread 2: ==2028== Invalid read of size 4 ==2028== at 0x4080597D: QSqlDatabase::commit() (sql/qsqldatabase.cpp:775) ==2028== by 0x8050BAC: PrintEngine::run() (printengine.cpp:118) ==2028== by 0x404A6BF5: QThreadInstance::start(void*) (kernel/qthread_unix.cpp:120) ==2028== by 0x40D0E5C8: thread_wrapper (in/usr/lib/valgrind/libpthread.so) ==2028== Address 0x443F8EFC is 0 bytesinsidea block of size 36 free'd ==2028== at 0x40163266: __builtin_delete(in /usr/lib/valgrind/valgrind.so) ==2028== by 0x40163284: operatordelete(void*) (in /usr/lib/valgrind/valgrind.so) ==2028== by 0x40805655: QSqlDatabase::~QSqlDatabase() (sql/qsqldatabase.cpp:660) ==2028== by 0x40806D8C: QDict<QSqlDatabase>::deleteItem(void*) (../include/qdict.h:97) ==2028== ==2028== Thread 2: ==2028== Invalid read of size 4 ==2028== at 0x4080597F: QSqlDatabase::commit() (sql/qsqldatabase.cpp:775) ==2028== by 0x8050BAC: PrintEngine::run() (printengine.cpp:118) ==2028== by 0x404A6BF5: QThreadInstance::start(void*) (kernel/qthread_unix.cpp:120) ==2028== by 0x40D0E5C8: thread_wrapper (in/usr/lib/valgrind/libpthread.so) ==2028== Address 0x443F8F50 is 0 bytesinsidea block of size 72 free'd ==2028== at 0x40163266: __builtin_delete(in /usr/lib/valgrind/valgrind.so) ==2028== by 0x40163284: operatordelete(void*) (in /usr/lib/valgrind/valgrind.so) ==2028== by 0x4082D983: QPSQLDriver::~QPSQLDriver() (sql/drivers/psql/qsql_psql.cpp:600) ==2028== by 0x408055FC: QSqlDatabase::~QSqlDatabase() (sql/qsqldatabase.cpp:656) ==2028== ==2028== Thread 2: ==2028== Invalid read of size 4 ==2028== at 0x40805989: QSqlDatabase::commit() (sql/qsqldatabase.cpp:775) ==2028== by 0x8050BAC: PrintEngine::run() (printengine.cpp:118) ==2028== by 0x404A6BF5: QThreadInstance::start(void*) (kernel/qthread_unix.cpp:120) ==2028== by 0x40D0E5C8: thread_wrapper (in/usr/lib/valgrind/libpthread.so) ==2028== Address 0x443F8E8C is 40 bytesinsidea block of size 44 free'd ==2028== at 0x40163266: __builtin_delete(in /usr/lib/valgrind/valgrind.so) ==2028== by 0x40163284: operatordelete(void*) (in /usr/lib/valgrind/valgrind.so) ==2028== by 0x408056A1: QSqlDatabase::~QSqlDatabase() (sql/qsqldatabase.cpp:674) ==2028== by 0x40806D8C: QDict<QSqlDatabase>::deleteItem(void*) (../include/qdict.h:97) ==2028== ==2028== Thread 2: ==2028== Invalid read of size 4 ==2028== at 0x4080598C: QSqlDatabase::commit() (sql/qsqldatabase.cpp:775) ==2028== by 0x8050BAC: PrintEngine::run() (printengine.cpp:118) ==2028== by 0x404A6BF5: QThreadInstance::start(void*) (kernel/qthread_unix.cpp:120) ==2028== by 0x40D0E5C8: thread_wrapper (in/usr/lib/valgrind/libpthread.so) ==2028== Address 0x443F8EFC is 0 bytesinsidea block of size 36 free'd ==2028== at 0x40163266: __builtin_delete(in /usr/lib/valgrind/valgrind.so) ==2028== by 0x40163284: operatordelete(void*) (in /usr/lib/valgrind/valgrind.so) ==2028== by 0x40805655: QSqlDatabase::~QSqlDatabase() (sql/qsqldatabase.cpp:660) ==2028== by 0x40806D8C: QDict<QSqlDatabase>::deleteItem(void*) (../include/qdict.h:97) disInstr: unhandled opcode 0x6E then 0xCD valgrind: the `impossible' happened: unhandled x86 opcode Basic block ctr is approximately 22650000 sched status: Thread 1: status = Runnable, associated_mx = 0x0, associated_cv = 0x0 ==2028== at 0x40007BB0: do_lookup (in /lib/ld-2.3.2.so) ==2028== by 0x400069E2: _dl_lookup_symbol_internal (in /lib/ld-2.3.2.so) ==2028== by 0x4000AE30: fixup (in /lib/ld-2.3.2.so) ==2028== by 0x4000B05F: _dl_runtime_resolve (in /lib/ld-2.3.2.so) Thread 2: status = Runnable, associated_mx = 0x0, associated_cv = 0x0 ==2028== at 0x40ADAF78: ??? ==2028== by 0x8050BAC: PrintEngine::run() (printengine.cpp:118) ==2028== by 0x404A6BF5: QThreadInstance::start(void*) (kernel/qthread_unix.cpp:120) ==2028== by 0x40D0E5C8: thread_wrapper (in/usr/lib/valgrind/libpthread.so) Thread 3: status = Runnable, associated_mx = 0x0, associated_cv = 0x0 ==2028== at 0x4043C542: QGArray::at(unsigned) const (../include/qgarray.h:120) ==2028== by 0x4090262B: QRegExpEngine::heuristicallyChooseHeuristic() (tools/qregexp.cpp:1495) ==2028== by 0x40906573: QRegExpEngine::Box::setupHeuristics() (tools/qregexp.cpp:2545) ==2028== by 0x40907832: QRegExpEngine::parse(QChar const*, int) (tools/qregexp.cpp:2940) Thread 4: status = WaitMX, associated_mx = 0x4382FB94, associated_cv = 0x0 ==2028== at 0x40D0EB94: __pthread_mutex_lock (in /usr/lib/valgrind/libpthread.so) ==2028== by 0x408D3D29: QRealMutexPrivate::lock() (tools/qmutex_unix.cpp:142) ==2028== by 0x408D4963: QMutex::lock() (tools/qmutex_unix.cpp:464) ==2028== by 0x804FD9E: PrintEngine::run() (printengine.cpp:56) Thread 5: status = WaitMX, associated_mx = 0x4382FB94, associated_cv = 0x0 ==2028== at 0x40D0EB94: __pthread_mutex_lock (in /usr/lib/valgrind/libpthread.so) ==2028== by 0x408D3D29: QRealMutexPrivate::lock() (tools/qmutex_unix.cpp:142) ==2028== by 0x408D4963: QMutex::lock() (tools/qmutex_unix.cpp:464) ==2028== by 0x804FD9E: PrintEngine::run() (printengine.cpp:56) Thread 6: status = WaitMX, associated_mx = 0x4382FB94, associated_cv = 0x0 ==2028== at 0x40D0EB94: __pthread_mutex_lock (in /usr/lib/valgrind/libpthread.so) ==2028== by 0x408D3D29: QRealMutexPrivate::lock() (tools/qmutex_unix.cpp:142) ==2028== by 0x408D4963: QMutex::lock() (tools/qmutex_unix.cpp:464) ==2028== by 0x804FD9E: PrintEngine::run() (printengine.cpp:56) Thread 7: status = WaitMX, associated_mx = 0x4382FB94, associated_cv = 0x0 ==2028== at 0x40D0EB94: __pthread_mutex_lock (in /usr/lib/valgrind/libpthread.so) ==2028== by 0x408D3D29: QRealMutexPrivate::lock() (tools/qmutex_unix.cpp:142) ==2028== by 0x408D4963: QMutex::lock() (tools/qmutex_unix.cpp:464) ==2028== by 0x804FD9E: PrintEngine::run() (printengine.cpp:56) Thread 8: status = WaitCV, associated_mx = 0x45F7FE10, associated_cv = 0x4382FC18 ==2028== at 0x40D0EE6A: pthread_cond_wait (in /usr/lib/valgrind/libpthread.so) ==2028== by 0x408D5C79: QWaitCondition::wait(unsigned long) (tools/qwaitcondition_unix.cpp:243) ==2028== by 0x804FD6D: PrintEngine::run() (printengine.cpp:51) ==2028== by 0x404A6BF5: QThreadInstance::start(void*) (kernel/qthread_unix.cpp:120) Thread 9: status = WaitCV, associated_mx = 0x4619FE10, associated_cv = 0x4382FC18 ==2028== at 0x40D0EE6A: pthread_cond_wait (in /usr/lib/valgrind/libpthread.so) ==2028== by 0x408D5C79: QWaitCondition::wait(unsigned long) (tools/qwaitcondition_unix.cpp:243) ==2028== by 0x804FD6D: PrintEngine::run() (printengine.cpp:51) ==2028== by 0x404A6BF5: QThreadInstance::start(void*) (kernel/qthread_unix.cpp:120) Thread 10: status = WaitCV, associated_mx = 0x464BFE10, associated_cv = 0x4382FC18 ==2028== at 0x40D0EE6A: pthread_cond_wait (in /usr/lib/valgrind/libpthread.so) ==2028== by 0x408D5C79: QWaitCondition::wait(unsigned long) (tools/qwaitcondition_unix.cpp:243) ==2028== by 0x804FD6D: PrintEngine::run() (printengine.cpp:51) ==2028== by 0x404A6BF5: QThreadInstance::start(void*) (kernel/qthread_unix.cpp:120) Thread 11: status = WaitCV, associated_mx = 0x4672CE10, associated_cv = 0x4382FC18 ==2028== at 0x40D0EE6A: pthread_cond_wait (in /usr/lib/valgrind/libpthread.so) ==2028== by 0x408D5C79: QWaitCondition::wait(unsigned long) (tools/qwaitcondition_unix.cpp:243) ==2028== by 0x804FD6D: PrintEngine::run() (printengine.cpp:51) ==2028== by 0x404A6BF5: QThreadInstance::start(void*) (kernel/qthread_unix.cpp:120) Thread 12: status = WaitCV, associated_mx = 0x4694CE10, associated_cv = 0x4382FC18 ==2028== at 0x40D0EE6A: pthread_cond_wait (in /usr/lib/valgrind/libpthread.so) ==2028== by 0x408D5C79: QWaitCondition::wait(unsigned long) (tools/qwaitcondition_unix.cpp:243) ==2028== by 0x804FD6D: PrintEngine::run() (printengine.cpp:51) ==2028== by 0x404A6BF5: QThreadInstance::start(void*) (kernel/qthread_unix.cpp:120) Thread 13: status = WaitCV, associated_mx = 0x46B7EE10, associated_cv = 0x4382FC18 ==2028== at 0x40D0EE6A: pthread_cond_wait (in /usr/lib/valgrind/libpthread.so) ==2028== by 0x408D5C79: QWaitCondition::wait(unsigned long) (tools/qwaitcondition_unix.cpp:243) ==2028== by 0x804FD6D: PrintEngine::run() (printengine.cpp:51) ==2028== by 0x404A6BF5: QThreadInstance::start(void*) (kernel/qthread_unix.cpp:120) Thread 14: status = WaitCV, associated_mx = 0x46DB0E10, associated_cv = 0x4382FC18 ==2028== at 0x40D0EE6A: pthread_cond_wait (in /usr/lib/valgrind/libpthread.so) ==2028== by 0x408D5C79: QWaitCondition::wait(unsigned long) (tools/qwaitcondition_unix.cpp:243) ==2028== by 0x804FD6D: PrintEngine::run() (printengine.cpp:51) ==2028== by 0x404A6BF5: QThreadInstance::start(void*) (kernel/qthread_unix.cpp:120) Thread 15: status = WaitCV, associated_mx = 0x46FE2E10, associated_cv = 0x4382FC18 ==2028== at 0x40D0EE6A: pthread_cond_wait (in /usr/lib/valgrind/libpthread.so) ==2028== by 0x408D5C79: QWaitCondition::wait(unsigned long) (tools/qwaitcondition_unix.cpp:243) ==2028== by 0x804FD6D: PrintEngine::run() (printengine.cpp:51) ==2028== by 0x404A6BF5: QThreadInstance::start(void*) (kernel/qthread_unix.cpp:120) Thread 16: status = WaitCV, associated_mx = 0x47214E10, associated_cv = 0x4382FC18 ==2028== at 0x40D0EE6A: pthread_cond_wait (in /usr/lib/valgrind/libpthread.so) ==2028== by 0x408D5C79: QWaitCondition::wait(unsigned long) (tools/qwaitcondition_unix.cpp:243) ==2028== by 0x804FD6D: PrintEngine::run() (printengine.cpp:51) ==2028== by 0x404A6BF5: QThreadInstance::start(void*) (kernel/qthread_unix.cpp:120) Please report this bug to: jseward@acm.org ------------------------------------------------------- -- MvG, Frank.