RFR: 8284437: Building from different users/workspace is not always deterministic [v2]

[Andrew Leonard]

On Wed, 6 Apr 2022 13:30:28 GMT, Andrew Leonard <aleonard at openjdk.org> wrote:

>> This PR fixes the non-deterministic behavior when building on linux with different userids or within
>> different workspace folders.
>> It fixes the following issues:
>> - MakeZipReproducible.java used to produce reproducible src.zip removes the optional zip "extra" field containing UID/GID.
>> - When absolute output paths are not allowed, enable the use of -fdebug-prefix-map to ensure debug symbol info does not contain the top level workspace folder.
>> - For reproducible builds ensure the gcc random symbol name generator is seeded using -frandom-seed.
>> - For reproducible builds when producing debug symbols use relative object paths for library linking to remove absolute MASM object paths.
>> 
>> Signed-off-by: Andrew Leonard <anleonar at redhat.com>
>
> Andrew Leonard has updated the pull request incrementally with one additional commit since the last revision:
> 
>   Trigger checks

I am not sure why without the explicit .file directive that the FILE symbol in the ELF info contains an entry pointing to the .o object file, here's what it was before:

 31712: 0000000000000000     0 FILE    LOCAL  DEFAULT  ABS /home/andrew2/jdk/build/linux-aarch64-server-release/hotspot/variant-server/libjvm/objs/atomic_linux_aarch64.o

It's as if the lack of the .file has caused some tooling (linker?) to create this entry using the .o file path.

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PR: https://git.openjdk.java.net/jdk/pull/8124