I'm seeing this gen object error with gcc does not occur in llvm for a bpf test(which uses both linked_maps1.c and linked_maps2.c) in bpf-next. I presume there is a bug in GCC which is triggering a double free bug in libbpf. GCC gen object failure: ==2125110== Command: /home/buildroot/bpf-next/tools/testing/selftests/bpf/tools/sbin/bpftool --debug gen object /home/buildroot/bpf-next/tools/testing/selftests/bpf/bpf_gcc/linked_maps.linked1.o /home/buildroot/bpf-next/tools/testing/selftests/bpf/bpf_gcc/linked_maps1.bpf.o /home/buildroot/bpf-next/tools/testing/selftests/bpf/bpf_gcc/linked_maps2.bpf.o ==2125110== libbpf: linker: adding object file '/home/buildroot/bpf-next/tools/testing/selftests/bpf/bpf_gcc/linked_maps1.bpf.o'... libbpf: linker: adding object file '/home/buildroot/bpf-next/tools/testing/selftests/bpf/bpf_gcc/linked_maps2.bpf.o'... Error: failed to link '/home/buildroot/bpf-next/tools/testing/selftests/bpf/bpf_gcc/linked_maps2.bpf.o': Cannot allocate memory (12) ==2125110== Invalid free() / delete / delete[] / realloc() ==2125110== at 0x484B0C4: free (vg_replace_malloc.c:884) ==2125110== by 0x17F8AB: bpf_linker__free (linker.c:204) ==2125110== by 0x12833C: do_object (gen.c:1608) ==2125110== by 0x12CDAB: cmd_select (main.c:206) ==2125110== by 0x129B53: do_gen (gen.c:2332) ==2125110== by 0x12CDAB: cmd_select (main.c:206) ==2125110== by 0x12DB9E: main (main.c:539) ==2125110== Address 0xda4b420 is 0 bytes after a block of size 0 free'd ==2125110== at 0x484B027: free (vg_replace_malloc.c:883) ==2125110== by 0x484D6F8: realloc (vg_replace_malloc.c:1451) ==2125110== by 0x181FA3: extend_sec (linker.c:1117) ==2125110== by 0x182326: linker_append_sec_data (linker.c:1201) ==2125110== by 0x1803DC: bpf_linker__add_file (linker.c:453) ==2125110== by 0x12829E: do_object (gen.c:1593) ==2125110== by 0x12CDAB: cmd_select (main.c:206) ==2125110== by 0x129B53: do_gen (gen.c:2332) ==2125110== by 0x12CDAB: cmd_select (main.c:206) ==2125110== by 0x12DB9E: main (main.c:539) ==2125110== Block was alloc'd at ==2125110== at 0x484876A: malloc (vg_replace_malloc.c:392) ==2125110== by 0x484D6EB: realloc (vg_replace_malloc.c:1451) ==2125110== by 0x181FA3: extend_sec (linker.c:1117) ==2125110== by 0x182326: linker_append_sec_data (linker.c:1201) ==2125110== by 0x1803DC: bpf_linker__add_file (linker.c:453) ==2125110== by 0x12829E: do_object (gen.c:1593) ==2125110== by 0x12CDAB: cmd_select (main.c:206) ==2125110== by 0x129B53: do_gen (gen.c:2332) ==2125110== by 0x12CDAB: cmd_select (main.c:206) ==2125110== by 0x12DB9E: main (main.c:539)
