McRogueFace/sanitizers/valgrind-mcrf.supp

#
# McRogueFace Valgrind Suppression File
#
# Adapted from CPython's Misc/valgrind-python.supp with _PyObject_Free
# and _PyObject_Realloc entries uncommented and updated for 64-bit.
#
# Usage:
#   valgrind --tool=memcheck --suppressions=sanitizers/valgrind-mcrf.supp \
#       --leak-check=full --error-exitcode=42 ./build-debug/mcrogueface ...
#
# NOTE: For best results, run with PYTHONMALLOC=malloc so that all Python
# allocations go through system malloc and are fully visible to Valgrind.
# When using PYTHONMALLOC=malloc, the pymalloc suppressions below are not
# needed, but they're kept for cases where you want to run without it.
#

###############################################################################
# CPython pymalloc internals (address_in_range)
###############################################################################

{
   ADDRESS_IN_RANGE/Invalid read of size 4
   Memcheck:Addr4
   fun:address_in_range
}

{
   ADDRESS_IN_RANGE/Invalid read of size 4
   Memcheck:Value4
   fun:address_in_range
}

{
   ADDRESS_IN_RANGE/Invalid read of size 8 (x86_64)
   Memcheck:Value8
   fun:address_in_range
}

{
   ADDRESS_IN_RANGE/Conditional jump depends on uninitialised value
   Memcheck:Cond
   fun:address_in_range
}

###############################################################################
# _PyObject_Free — pymalloc's free; reads pool headers that look
# uninitialised to Valgrind. Updated from Addr4/Value4 to Addr8/Value8
# for 64-bit systems.
###############################################################################

{
   _PyObject_Free/Invalid read of size 4
   Memcheck:Addr4
   fun:_PyObject_Free
}

{
   _PyObject_Free/Invalid read of size 4
   Memcheck:Value4
   fun:_PyObject_Free
}

{
   _PyObject_Free/Use of uninitialised value of size 8
   Memcheck:Addr8
   fun:_PyObject_Free
}

{
   _PyObject_Free/Use of uninitialised value of size 8
   Memcheck:Value8
   fun:_PyObject_Free
}

{
   _PyObject_Free/Conditional jump depends on uninitialised value
   Memcheck:Cond
   fun:_PyObject_Free
}

###############################################################################
# _PyObject_Realloc — same pymalloc pool-header reads as _PyObject_Free
###############################################################################

{
   _PyObject_Realloc/Invalid read of size 4
   Memcheck:Addr4
   fun:_PyObject_Realloc
}

{
   _PyObject_Realloc/Invalid read of size 4
   Memcheck:Value4
   fun:_PyObject_Realloc
}

{
   _PyObject_Realloc/Use of uninitialised value of size 8
   Memcheck:Addr8
   fun:_PyObject_Realloc
}

{
   _PyObject_Realloc/Use of uninitialised value of size 8
   Memcheck:Value8
   fun:_PyObject_Realloc
}

{
   _PyObject_Realloc/Conditional jump depends on uninitialised value
   Memcheck:Cond
   fun:_PyObject_Realloc
}

###############################################################################
# CPython intentional leaks — interned strings, type objects, small int
# cache, and other objects that live for the entire process lifetime
###############################################################################

{
   Suppress leaking the GIL after a fork
   Memcheck:Leak
   fun:malloc
   fun:PyThread_allocate_lock
   fun:PyEval_ReInitThreads
}

{
   Suppress leaking the autoTLSkey
   Memcheck:Leak
   fun:malloc
   fun:PyThread_create_key
   fun:_PyGILState_Init
   ...
}

{
   Handle pthread leak (possibly leaked)
   Memcheck:Leak
   fun:calloc
   fun:allocate_dtv
   fun:_dl_allocate_tls_storage
   fun:_dl_allocate_tls
}

{
   Handle pthread leak (possibly leaked)
   Memcheck:Leak
   fun:memalign
   fun:_dl_allocate_tls_storage
   fun:_dl_allocate_tls
}

###############################################################################
# dlopen internals — these leak by design (loaded libraries stay resident)
###############################################################################

{
   dlopen without dlclose (strdup via cache lookup)
   Memcheck:Leak
   fun:malloc
   fun:malloc
   fun:strdup
   fun:_dl_load_cache_lookup
}

{
   dlopen without dlclose (strdup via map object)
   Memcheck:Leak
   fun:malloc
   fun:malloc
   fun:strdup
   fun:_dl_map_object
}

{
   dlopen without dlclose (new object via malloc)
   Memcheck:Leak
   fun:malloc
   fun:*
   fun:_dl_new_object
}

{
   dlopen without dlclose (new object via calloc)
   Memcheck:Leak
   fun:calloc
   fun:*
   fun:_dl_new_object
}

{
   dlopen without dlclose (check map versions)
   Memcheck:Leak
   fun:calloc
   fun:*
   fun:_dl_check_map_versions
}

###############################################################################
# CPython false positives
###############################################################################

{
   bpo-38118: Valgrind false alarm on GCC builtin strcmp
   Memcheck:Cond
   fun:PyUnicode_Decode
}

{
   Uninitialised byte(s) false alarm (bpo-35561)
   Memcheck:Param
   epoll_ctl(event)
   fun:epoll_ctl
   fun:pyepoll_internal_ctl
}

{
   wcscmp false positive in command line parsing
   Memcheck:Addr8
   fun:wcscmp
   fun:_PyOS_GetOpt
   ...
}

###############################################################################
# CPython 3.14 specific — type slot lookups can read union members that
# Valgrind thinks are uninitialised (they're valid via different union paths)
###############################################################################

{
   CPython type slot union reads
   Memcheck:Cond
   fun:_Py_type_getattro
   ...
}

{
   CPython type slot union reads (value variant)
   Memcheck:Value8
   fun:_Py_type_getattro
   ...
}

###############################################################################
# SFML / OpenGL driver internals — graphics drivers have their own allocators
# that produce false positives. Only suppress known-safe patterns.
###############################################################################

{
   Mesa/OpenGL driver init leaks
   Memcheck:Leak
   ...
   obj:*/dri/*_dri.so
}

{
   X11 display connection leaks
   Memcheck:Leak
   ...
   fun:XOpenDisplay
}

{
   SFML font/texture init
   Memcheck:Leak
   ...
   fun:*sf*Font*
}