Mysterious /home/buildbot/.debug/ directory is filling the disk of AArch64 Fedora buildbots

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On two AArch64 Fedora buildbot workers, there is a mysterious /home/buildbot/.debug/ directory which contains more than 70 GB of random files. I don't know what created these files but there are filling the disk.

It may be related to SystemTap. cc @stratakis

Example of content:

./home/buildbot/buildarea/3.x.cstratak-fedora-stable-aarch64.refleak/build/python/fbfc55b13cd2fb6f973ac5d4bfc38b68aa929f4a/elf
./home/buildbot/buildarea/3.x.cstratak-fedora-stable-aarch64.refleak/build/python/fbfc55b13cd2fb6f973ac5d4bfc38b68aa929f4a/probes
./home/buildbot/buildarea/3.13.cstratak-fedora-stable-aarch64.refleak/build/python/208beaba1427bf4f121c032812f921674d83b21f/elf
./home/buildbot/buildarea/3.13.cstratak-fedora-stable-aarch64.refleak/build/python/208beaba1427bf4f121c032812f921674d83b21f/probes
./[vdso]/86276518cf2d3106081e1ff7639ae9f7cd5aa490/vdso
./[vdso]/86276518cf2d3106081e1ff7639ae9f7cd5aa490/probes
./usr/lib/ld-linux-aarch64.so.1/c11d21d5efb3dd09d66a0ba3ffc35d8b7ab98d34/elf
./usr/lib/ld-linux-aarch64.so.1/c11d21d5efb3dd09d66a0ba3ffc35d8b7ab98d34/probes
./usr/lib64/libc.so.6/0b114a16c11a30fd7f69460c844769304ca9ebaf/elf
./usr/lib64/libc.so.6/0b114a16c11a30fd7f69460c844769304ca9ebaf/probes
./[kernel.kallsyms]/114df0fd4cb802c7a9b4223c4a7983ab97859116/kallsyms
./tmp/jitted-3349028-1.so/5c050d46136b7270551a62635decd0bb00000000/elf
./tmp/jitted-3349028-1.so/5c050d46136b7270551a62635decd0bb00000000/probes
./tmp/jitted-3349028-10.so/034c1d21c2ab0972df3fe9c93e2df4db00000000/elf
./tmp/jitted-3349028-10.so/034c1d21c2ab0972df3fe9c93e2df4db00000000/probes
./tmp/jitted-3349028-100.so/621026082183074121bc8cfb3a02dbee00000000/elf
./tmp/jitted-3349028-100.so/621026082183074121bc8cfb3a02dbee00000000/probes
./tmp/jitted-3349028-101.so/8706dac7faf88b026822b7f57d6af08e00000000/elf
./tmp/jitted-3349028-101.so/8706dac7faf88b026822b7f57d6af08e00000000/probes
./tmp/jitted-3349028-102.so/c02b3413eafc593a51e198ffbe1c784000000000/elf
./tmp/jitted-3349028-102.so/c02b3413eafc593a51e198ffbe1c784000000000/probes
./tmp/jitted-3349028-103.so/c3899fdebda5e7c6b4fd9a68b181201500000000/elf
./tmp/jitted-3349028-103.so/c3899fdebda5e7c6b4fd9a68b181201500000000/probes

There are 4 different file names:

root@localhost:/home/buildbot# find .debug -type f|sed -e 's!.*/\(.*\)!\1!g'|sort -u
elf
kallsyms
probes
vdso

elf and vdso are AArch64 ELF files.

probes and kallsyms are text files.

kallsyms seems to be a copy of /proc/kallsyms.

Example of probes file:

root@localhost:/home/buildbot/.debug# cat ./usr/lib/ld-linux-aarch64.so.1/c11d21d5efb3dd09d66a0ba3ffc35d8b7ab98d34/probes
%sdt_rtld:unmap_start=unmap_start
p:sdt_rtld/unmap_start /usr/lib/ld-linux-aarch64.so.1:0x1bd4 arg1=%x22:s64 arg2=%x19:u64
%sdt_rtld:unmap_complete=unmap_complete
p:sdt_rtld/unmap_complete /usr/lib/ld-linux-aarch64.so.1:0x1e98 arg1=%x22:s64 arg2=%x19:u64
%sdt_rtld:map_start=map_start
p:sdt_rtld/map_start /usr/lib/ld-linux-aarch64.so.1:0x6970 arg1=%x23:s64 arg2=%x20:u64
%sdt_rtld:reloc_start=reloc_start
p:sdt_rtld/reloc_start /usr/lib/ld-linux-aarch64.so.1:0xa124 arg3=%x1:u64
%sdt_rtld:map_complete=map_complete
p:sdt_rtld/map_complete /usr/lib/ld-linux-aarch64.so.1:0xa9ec arg3=%x23:u64 arg4=%x19:u64
%sdt_rtld:reloc_complete=reloc_complete
p:sdt_rtld/reloc_complete /usr/lib/ld-linux-aarch64.so.1:0xadb8 arg3=%x23:u64 arg4=%x19:u64
%sdt_rtld:init_start=init_start
p:sdt_rtld/init_start /usr/lib/ld-linux-aarch64.so.1:0x18104 arg2=%x23:u64
%sdt_rtld:init_complete=init_complete
p:sdt_rtld/init_complete /usr/lib/ld-linux-aarch64.so.1:0x18548 arg2=%x19:u64
%sdt_rtld:lll_lock_wait_private=lll_lock_wait_private
p:sdt_rtld/lll_lock_wait_private /usr/lib/ld-linux-aarch64.so.1:0x1c830 arg1=%x19:u64
%sdt_rtld:lll_lock_wait=lll_lock_wait
p:sdt_rtld/lll_lock_wait /usr/lib/ld-linux-aarch64.so.1:0x1c8b4 arg1=%x19:u64
%sdt_rtld:setjmp=setjmp
p:sdt_rtld/setjmp /usr/lib/ld-linux-aarch64.so.1:0x1cb28 arg1=%x0:u64 arg2=%x1:s32
%sdt_rtld:longjmp=longjmp
p:sdt_rtld/longjmp /usr/lib/ld-linux-aarch64.so.1:0x1cba8 arg1=%x0:u64 arg2=%x1:s32
%sdt_rtld:longjmp_target=longjmp_target
p:sdt_rtld/longjmp_target /usr/lib/ld-linux-aarch64.so.1:0x1cbd0 arg1=%x0:u64 arg2=%x1:s32