Package: systemtap-sdt-dev Version: 4.8-1 User: reproducible-bui...@lists.alioth.debian.org Usertags: randomness filesystem Control: block 1032055 by -1
`dtrace -G` creates temporary files with random filenames. The name of these temporary files gets embedded in the ELF `.symtab` of the final object files, making them always slightly different.
This behavior makes all packages that use `dtrace`-produced object files inherently non reproducible.
Instead of being fully random, `dtrace` should employ some sort of controlled reproducible randomness, for example based on the value of `SOURCE_DATE_EPOCH`. See also <https://reproducible-builds.org/docs/randomness/>.
To reproduce this issue: ``` $ git clone https://salsa.debian.org/sssd-team/sssd.git $ cd sssd $ mkdir -p build && cd build/ $ dtrace -C -G -s ../src/systemtap/sssd_probes.d -o stap_generated_probes.o $ readelf --wide --symbols stap_generated_probes.o > sym1.txt $ dtrace -C -G -s ../src/systemtap/sssd_probes.d -o stap_generated_probes.o $ readelf --wide --symbols stap_generated_probes.o > sym2.txt $ diff -u sym1.txt sym2.txt --- sym1.txt 2023-02-27 08:38:48.955299234 +0100 +++ sym2.txt 2023-02-27 08:38:49.103303352 +0100 @@ -2,7 +2,7 @@ Symbol table '.symtab' contains 59 entries: Num: Value Size Type Bind Vis Ndx Name 0: 0000000000 0 NOTYPE LOCAL DEFAULT UND - 1: 0000000000 0 FILE LOCAL DEFAULT ABS .dtrace-temp.4f0bbdda.c + 1: 0000000000 0 FILE LOCAL DEFAULT ABS .dtrace-temp.d20e76c7.c 2: 0000000000 0 SECTION LOCAL DEFAULT 1 .text 3: 0000000000 7 FUNC LOCAL DEFAULT 1 __dtrace 4: 0000000000 0 SECTION LOCAL DEFAULT 5 .debug_info ``` Regards, -- Gioele Barabucci
