File: glibc-2.34567-NPTL-helgrind.supp

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# FIXME 22 Jan 09: helgrind-glibc2X-005 overlaps with a lot of
# other stuff.  They should be removed.

##----------------------------------------------------------------------##
# Suppressions for the Helgrind tool when using 
# a glibc-2.{3,4,5,6,7,8,9} system

####################################################
# glibc-2.X specific
# These are generic cover-alls which catch a lot of stuff
# in various combinations of ld, libc and libpthread
#
# Note this is heavyhanded and not very clever:
#
# - suppress anything that has its top frame in ld.so
#   That's fine, since it's mostly dynamic linking stuff,
#   which has various deliberate (harmless) races
#
# - suppress anything that has its top frame in libc.so.
#   This really isn't clever, since it could hide some 
#   legitimate races.  But the problem is, if we don't do
#   this, then loads of errors to do with stdio are reported, because
#   H fails to see glibc's internal locking/unlocking of FILE*s
#   as required by POSIX.  A better solution is needed.

#{
#   helgrind-glibc2X-001
#   Helgrind:Race
#   obj:*/lib*/ld-2.*so*
#}

# helgrind-glibc2X-002 was merged into helgrind-glibc2X-001

# helgrind-glibc2X-003 was merged into helgrind-glibc2X-001

{
   helgrind-glibc2X-004
   Helgrind:Race
   obj:*/lib*/libc-2.*so*
}

{
   helgrind-glibc2X-005
   Helgrind:Race
   obj:*/lib*/libpthread-2.*so*
}

# helgrind-glibc2X-006 was merged into helgrind-glibc2X-005

# helgrind-glibc2X-007 was merged into helgrind-glibc2X-001

# helgrind-glibc2X-008 was merged into helgrind-glibc2X-004

# helgrind-glibc2X-009 was merged into helgrind-glibc2X-004

# helgrind-glibc2X-010 was merged into helgrind-glibc2X-001

# helgrind-glibc2X-011 was merged into helgrind-glibc2X-004

# helgrind-glibc2X-012 was merged into helgrind-glibc2X-001

# helgrind-glibc2X-013 was merged into helgrind-glibc2X-001

# helgrind-glibc2X-014 was merged into helgrind-glibc2X-001

# helgrind-glibc2X-015 was merged into helgrind-glibc2X-004

# helgrind-glibc2X-016 was merged into helgrind-glibc2X-004

# These are very ugly.  They are needed to suppress errors inside (eg)
# NPTL's pthread_cond_signal.  Why only one stack frame -- at least we
# should see the wrapper calling the real functions, right?
# Unfortunately, no: the real functions are handwritten assembly (in
# the glibc-2.5 sources) and does not create a proper stack frame.
# Therefore it's only one level of unwinding before we're back out in
# user code rather than the 2 levels you'd expect.
{
   helgrind-glibc2X-101
   Helgrind:Race
   obj:*/lib*/libpthread-2.*so*
   fun:pthread_*
}
{
   helgrind-glibc2X-102
   Helgrind:Race
   fun:mythread_wrapper
   obj:*/lib*/libpthread-2.*so*
}
{
   helgrind-glibc2X-103
   Helgrind:Race
   fun:pthread_cond_*@@GLIBC_2.*
}
{
   helgrind-glibc2X-104
   Helgrind:Race
   fun:__lll_mutex_*
}
{
   helgrind-glibc2X-105
   Helgrind:Race
   fun:pthread_rwlock_*lock*
}
{
   helgrind-glibc2X-106
   Helgrind:Race
   fun:__lll_lock_wait
}
{
   helgrind-glibc2X-107
   Helgrind:Race
   obj:*/lib*/libpthread-2.*so*
   fun:sem_*
}
{
   helgrind-glibc2X-108
   Helgrind:Race
   fun:clone
}
{
   helgrind-glibc2X-109
   Helgrind:Race
   fun:start_thread
}
{
   helgrind-glibc2X-110
   Helgrind:Race
   obj:*/lib*/libc-2.*so*
   fun:pthread_*
}
{
   helgrind-glibc2X-111
   Helgrind:Race
   fun:__lll_*lock_*
}
{
   helgrind-glibc2X-113
   Helgrind:Race
   fun:pthread_barrier_wait*
}


####################################################
# qt4 specific (GNU mangling)
#
{
   helgrind-qt4---QMutex::lock()-QMutex::lock()
   Helgrind:Race
   ...
   fun:_ZN6QMutex4lockEv
   fun:_ZN6QMutex4lockEv
}

{                                                               
   helgrind-qt4---QMutex::unlock()-QMutex::unlock()
   Helgrind:Race                                                
   ...
   fun:_ZN6QMutex6unlockEv                                      
   fun:_ZN6QMutex6unlockEv
}

{
   helgrind-qt4---pthread_setspecific-QThreadPrivate::start(void*)
   Helgrind:Race
   fun:pthread_setspecific
   fun:_ZN14QThreadPrivate5startEPv
}


####################################################
# Other stuff.
#
# pthread_exit apparently calls some kind of unwind
# mechanism - maybe to remove some number of frames
# from the thread's stack, so as to get back to the 
# outermost frame for the thread?  Anyway..

{
   helgrind---*Unwind*-...-pthread_exit
   Helgrind:Race
   fun:*Unwind*
   ...
   fun:pthread_exit
}

{
   helgrind---...-*Unwind*-*pthread_unwind*
   Helgrind:Race
   ...
   fun:*Unwind*
   fun:*pthread_unwind*
}

{
   helgrind---...-*Unwind*-*pthread_unwind*
   Helgrind:Race
   ...
   fun:_Unwind*
   ...
   fun:_Unwind_Backtrace
}




####################################################
# To do with thread stack allocation and deallocation?
#
{
   helgrind---free_stacks-__deallocate_stack
   Helgrind:Race
   fun:free_stacks
   fun:__deallocate_stack
}

{
   helgrind---__deallocate_stack-start_thread-clone
   Helgrind:Race
   fun:__deallocate_stack
   fun:start_thread
   fun:clone
}


####################################################
# To do with pthread_{set,get}specific
#
{
   helgrind---pthread_setspecific
   Helgrind:Race
   fun:pthread_setspecific
}

{
   helgrind---pthread_getspecific
   Helgrind:Race
   fun:pthread_getspecific
}


####################################################
# To do with dynamic linking
#
# helgrind---ld.so-...-dlsym was merged into helgrind-glibc2X-001

{
   helgrind---_dl_allocate_tls 
   Helgrind:Race
   fun:mempcpy
   fun:_dl_allocate_tls_init
   ...
   fun:pthread_create@@GLIBC_2.2*
   fun:pthread_create_WRK
   fun:pthread_create@*
}

####################################################
# To do with GNU libgomp
#
{
   helgrind---libgomp43-1
   Helgrind:Race
   fun:gomp_ordered_sync
}

{
   helgrind---libgomp43-1
   Helgrind:Race
   fun:gomp_ordered_next
}

{
   helgrind---libgomp43-1
   Helgrind:Race
   fun:gomp_ordered_last
}