Thread-safety issue in KConfig / KStandardDirs ?

[Sandro Andrade]

Hi there,

Does anyone know if KConfig / KStandardDirs are thread-safe ? I'm
facing the following error in a KDevelop plugin.
The error is sporadic but it seems to occur when two different threads
try to access KConfig.

Any hint ?
Thanks,
Sandro

Thread 5 (Thread 0xa30ffb70 (LWP 1362)):
[KCrash Handler]
#7 0xb76fa424 in __kernel_vsyscall ()
#8 0xb4fa1561 in raise () from /lib/libc.so.6
#9 0xb4fa2d62 in abort () from /lib/libc.so.6
#10 0xb4fdcc85 in __libc_message () from /lib/libc.so.6
#11 0xb4fe2b61 in malloc_printerr () from /lib/libc.so.6
#12 0xb4fe5cf8 in _int_malloc () from /lib/libc.so.6
#13 0xb4fe7583 in malloc () from /lib/libc.so.6
#14 0xb5fabad9 in qMalloc (size=60) at
/data/kdesvn/qt-copy/src/corelib/global/qmalloc.cpp:55
#15 0xb6004624 in QString (this=0xa30fe4d4, unicode=0xa948be2a,
size=20) at /data/kdesvn/qt-copy/src/corelib/tools/qstring.cpp:980
#16 0xb6009201 in QString::mid (this=0xa30fe640, position=4, n=20) at
/data/kdesvn/qt-copy/src/corelib/tools/qstring.cpp:3267
#17 0xb75ae701 in lookupPrefix (prefix=..., relpath=..., relPart=...,
regexp=..., list=..., relList=..., recursive=false, unique=false) at
/data/kdesvn/kdelibs/kdecore/kernel/kstandarddirs.cpp:736
#18 0xb75aeaea in lookupPrefix (prefix=<value optimized out>,
relpath=<value optimized out>, relPart=..., regexp=..., list=...,
relList=..., recursive=<value optimized out>,
unique=<value optimized out>) at
/data/kdesvn/kdelibs/kdecore/kernel/kstandarddirs.cpp:815
#19 0xb75aeaea in lookupPrefix (prefix=<value optimized out>,
relpath=<value optimized out>, relPart=..., regexp=..., list=...,
relList=..., recursive=<value optimized out>,
unique=<value optimized out>) at
/data/kdesvn/kdelibs/kdecore/kernel/kstandarddirs.cpp:815
#20 0xb75aeaea in lookupPrefix (prefix=<value optimized out>,
relpath=<value optimized out>, relPart=..., regexp=..., list=...,
relList=..., recursive=<value optimized out>,
unique=<value optimized out>) at
/data/kdesvn/kdelibs/kdecore/kernel/kstandarddirs.cpp:815
#21 0xb75af23e in KStandardDirs::findAllResources (this=0x8abce00,
type=0xb74620f5 "config", filter=..., options=..., relList=...) at
/data/kdesvn/kdelibs/kdecore/kernel/kstandarddirs.cpp:865
#22 0xb75af57f in KStandardDirs::findAllResources (this=0x8abce00,
type=0xb74620f5 "config", filter=..., options=...) at
/data/kdesvn/kdelibs/kdecore/kernel/kstandarddirs.cpp:877
#23 0xb750ea10 in KConfigPrivate::parseConfigFiles (this=0x8ae6808) at
/data/kdesvn/kdelibs/kdecore/config/kconfig.cpp:501
#24 0xb750ecbc in KConfig::reparseConfiguration (this=0x8c6e650) at
/data/kdesvn/kdelibs/kdecore/config/kconfig.cpp:453
#25 0xb73f12fe in KDevelop::Project::projectConfiguration
(this=0x8c937b0) at
/data/kdesvn/extragear/sdk/kdevplatform/shell/project.cpp:468
#26 0xaf834b76 in CMake::currentInstallDir (project=0x8c937b0) at
/data/kdesvn/extragear/sdk/kdevelop/projectmanagers/cmake/cmakeutils.cpp:139
#27 0xaf85244f in fetchInstallDir (project=0x8c937b0, dirs=...) at
/data/kdesvn/extragear/sdk/kdevelop/projectmanagers/cmake/cmakemanager.cpp:108
#28 resolveSystemDirs (project=0x8c937b0, dirs=...) at
/data/kdesvn/extragear/sdk/kdevelop/projectmanagers/cmake/cmakemanager.cpp:124
#29 0xaf8529e4 in CMakeManager::includeDirectories (this=0x8c93a80,
item=0x8cb9050) at
/data/kdesvn/extragear/sdk/kdevelop/projectmanagers/cmake/cmakemanager.cpp:659
#30 0xaaba7774 in DUChainControlFlow::globalNamespaceOrFolderNames
(this=0x8f60810, declaration=0x9d87d78) at
/data/kdesvn/controlflowgraph/duchaincontrolflow.cpp:500
#31 0xaaba8823 in DUChainControlFlow::prependFolderNames
(this=0x8f60810, declaration=0x9d893a0) at
/data/kdesvn/controlflowgraph/duchaincontrolflow.cpp:538
#32 0xaaba9061 in DUChainControlFlow::processFunctionCall
(this=0x8f60810, source=0x9de98a0, target=0x975e9f0, use=...) at
/data/kdesvn/controlflowgraph/duchaincontrolflow.cpp:239
#33 0xaabaa288 in DUChainControlFlow::useDeclarationsFromDefinition
(this=0x8f60810, definition=0x9de98a0, topContext=0x98b8da0,
context=0x9dd3db0)
at /data/kdesvn/controlflowgraph/duchaincontrolflow.cpp:416
#34 0xaabaa231 in DUChainControlFlow::useDeclarationsFromDefinition
(this=0x8f60810, definition=0x9de98a0, topContext=0x98b8da0,
context=0x9dbbd90)
at /data/kdesvn/controlflowgraph/duchaincontrolflow.cpp:423
#35 0xaabaa231 in DUChainControlFlow::useDeclarationsFromDefinition
(this=0x8f60810, definition=0x9de98a0, topContext=0x98b8da0,
context=0x9dbabc8)
at /data/kdesvn/controlflowgraph/duchaincontrolflow.cpp:423
#36 0xaabaa675 in
DUChainControlFlow::generateControlFlowForDeclaration (this=0x8f60810,
idefinition=..., itopContext=..., iuppermostExecutableContext=...)
at /data/kdesvn/controlflowgraph/duchaincontrolflow.cpp:129
#37 0xaabaa874 in DUChainControlFlow::run (this=0x8f60810) at
/data/kdesvn/controlflowgraph/duchaincontrolflow.cpp:78
#38 0xb700148d in ThreadWeaver::JobRunHelper::runTheJob
(this=0xa30ff24c, th=0xa480da70, job=0x8f60810) at
/data/kdesvn/kdelibs/threadweaver/Weaver/Job.cpp:106
#39 0xb70017f1 in ThreadWeaver::Job::execute (this=0x8f60810,
th=0xa480da70) at /data/kdesvn/kdelibs/threadweaver/Weaver/Job.cpp:135
#40 0xb70004da in ThreadWeaver::ThreadRunHelper::run (this=0xa30ff2d4,
parent=0xa480be38, th=0xa480da70) at
/data/kdesvn/kdelibs/threadweaver/Weaver/Thread.cpp:95
#41 0xb7000c2b in ThreadWeaver::Thread::run (this=0xa480da70) at
/data/kdesvn/kdelibs/threadweaver/Weaver/Thread.cpp:142
#42 0xb5fb2dbc in QThreadPrivate::start (arg=0xa480da70) at
/data/kdesvn/qt-copy/src/corelib/thread/qthread_unix.cpp:248
#43 0xb5ef994c in start_thread () from /lib/libpthread.so.0
#44 0xb5044eae in clone () from /lib/libc.so.6