https://gcc.gnu.org/bugzilla/show_bug.cgi?id=109003
Bug ID: 109003
Summary: memory leak in module loading (mio_formal_arglist)
Product: gcc
Version: 13.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: fortran
Assignee: unassigned at gcc dot gnu.org
Reporter: rguenth at gcc dot gnu.org
Target Milestone: ---
valgrind complains when building SPEC 2017 521.wrf
==24177== 32 bytes in 2 blocks are possibly lost in loss record 66 of 2,272
==24177== at 0x4C39571: calloc (in
/usr/lib/valgrind/vgpreload_memcheck-amd64-linux.so)
==24177== by 0x1C071F0: xcalloc (xmalloc.c:164)
==24177== by 0x766248: mio_formal_arglist (module.cc:3201)
==24177== by 0x766248: mio_symbol(gfc_symbol*) (module.cc:4586)
==24177== by 0x766836: load_needed(pointer_info*) (module.cc:5195)
==24177== by 0x7667E0: load_needed(pointer_info*) (module.cc:5154)
==24177== by 0x7667D5: load_needed(pointer_info*) (module.cc:5153)
==24177== by 0x7667D5: load_needed(pointer_info*) (module.cc:5153)
==24177== by 0x7667E0: load_needed(pointer_info*) (module.cc:5154)
==24177== by 0x7667D5: load_needed(pointer_info*) (module.cc:5153)
==24177== by 0x7667D5: load_needed(pointer_info*) (module.cc:5153)
==24177== by 0x7667D5: load_needed(pointer_info*) (module.cc:5153)
==24177== by 0x767C0B: read_module() (module.cc:5697)
I'm not sure what actually happens, but I guess sym->formal is eventually
replaced so the allocated memory gets dangling? Or we free some of the
module memory later but not everything.
It seems valgrind complains about a lot of leaks when modules are involved.
