Date: Wed, 5 May 2021 06:09:59 -0700 From: Mark Millard <marklmi@yahoo.com> To: Ed Maste <emaste@freebsd.org> Cc: FreeBSD-STABLE Mailing List <freebsd-stable@freebsd.org>, freebsd-current <freebsd-current@freebsd.org> Subject: Re: FYI: WITH_REPRODUCIBLE_BUILD= problem for some files? [aarch64 test did not reproduce the issue] Message-ID: <BD2F0EDC-9F3A-4D9C-89D5-A9A2DAC341F0@yahoo.com> In-Reply-To: <D50F7EA6-D9FE-4D47-8333-A41B73CF48AE@yahoo.com> References: <35482701-95A3-48B2-9A8E-B7E0092119B1.ref@yahoo.com> <35482701-95A3-48B2-9A8E-B7E0092119B1@yahoo.com> <CAPyFy2DQRn1CeiF=yaF6NgpLZ1zU8psbV0xiz-DWiSUy=DM8NA@mail.gmail.com> <43F20589-A7C7-42FF-9020-09CEE037D1CD@yahoo.com> <91F820A1-8940-4246-A20A-E62685F50079@yahoo.com> <F5D8E009-E6E1-42DA-856C-A6D91DA74A40@yahoo.com> <CAPyFy2B0va3FVa0-HKp3MJaJG=h6yPb%2BNMnjCy4kxBdUF=DybQ@mail.gmail.com> <27B5086A-7C98-4AE6-885A-CC7C7BD2F64B@yahoo.com> <3FC6BCDD-5865-4B5D-8238-3EC38AD4E78C@yahoo.com> <E832E3F0-8771-4943-B923-B02E4EDCCB17@yahoo.com> <2E86A8E9-9F0E-446E-BF80-5FA3B8ECB197@yahoo.com> <BC07B500-D36D-44AC-93D8-D3962155AD89@yahoo.com> <D50F7EA6-D9FE-4D47-8333-A41B73CF48AE@yahoo.com>
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On 2021-May-4, at 20:26, Mark Millard <marklmi at yahoo.com> wrote: > On 2021-May-4, at 13:38, Mark Millard <marklmi at yahoo.com> wrote: > >> [The first buidlworld is still in process. So while waiting . . .] >> >> On 2021-May-4, at 10:31, Mark Millard <marklmi at yahoo.com> wrote: >> >>> I probably know why the huge count of differences this time >>> unlike the original report . . . >>> >>> Previously I built based on a checked-in branch as part of >>> my experimenting. This time it was in a -dirty form (not >>> checked in), again as part of my experimental exploration. >>> >>> WITH_REPRODUCIBLE_BUILD= makes a distinction between these >>> if I remember right: (partially?) disabling itself for >>> -dirty style. >>> >>> To reproduce the original style of test I need to create >>> a branch with my few patches checked in and do the >>> buildworlds from that branch. >>> >>> This will, of course, take a while. >>> >>> Sorry for the noise. >>> >> >> I've confirmed some of the details of the large number of >> files with difference while waiting for the 1st buildworld : >> >> The 4 bytes at the end of the .gnu_debuglink section >> that are ending up different are the checksum for the >> .debug file. The .debug files have differences such as: >> >> │ - <1a> DW_AT_comp_dir : (indirect string) /usr/obj/BUILDs/13_0R-CA72-nodbg-clang-alt/usr/13_0R-src/arm64.aarch64/lib/csu/aarch64 >> │ + <1a> DW_AT_comp_dir : (indirect string) /usr/obj/BUILDs/13_0R-CA72-nodbg-clang/usr/13_0R-src/arm64.aarch64/lib/csu/aarch64 >> >> So I need to build, snapshot (in case need >> to reference), install, clean-out, build, >> install elsewhere, compare. (Or analogous >> that uses the same build base-path for both >> installs despite separate buildworld's.) >> This is separate from any potential -dirty >> vs. checked-in handling variation by >> WITH_REPRODUCIBLE_BUILD= . >> >> My process that produced the original armv7 >> report happened to do that before I accidentally >> discovered the presence of the few files with >> differences. My new experiments were different >> and I'd not though of needing to vary the >> procedure to get you the right evidence. >> > > The two aarch64 test installs did not show any > differences in a "diff -rq" . Ignoring *.meta > files generated during the builds, the build > directory tree snapshots showed just the > differences: > > # diff -rq /usr/obj/BUILDs/13_0R-CA72-nodbg-clang-alt/.zfs/snapshot/commited-style-0/usr /usr/obj/BUILDs/13_0R-CA72-nodbg-clang-alt/.zfs/snapshot/commited-style-1/usr | grep -v '\.meta' | more > Files /usr/obj/BUILDs/13_0R-CA72-nodbg-clang-alt/.zfs/snapshot/commited-style-0/usr/13_0R-src/arm64.aarch64/stand/ficl/softcore.c and /usr/obj/BUILDs/13_0R-CA72-nodbg-clang-alt/.zfs/snapshot/commited-style-1/usr/13_0R-src/arm64.aarch64/stand/ficl/softcore.c differ > Files /usr/obj/BUILDs/13_0R-CA72-nodbg-clang-alt/.zfs/snapshot/commited-style-0/usr/13_0R-src/arm64.aarch64/toolchain-metadata.mk and /usr/obj/BUILDs/13_0R-CA72-nodbg-clang-alt/.zfs/snapshot/commited-style-1/usr/13_0R-src/arm64.aarch64/toolchain-metadata.mk differ > > # diff -u /usr/obj/BUILDs/13_0R-CA72-nodbg-clang-alt/.zfs/snapshot/commited-style-0/usr/13_0R-src/arm64.aarch64/stand/ficl/softcore.c /usr/obj/BUILDs/13_0R-CA72-nodbg-clang-alt/.zfs/snapshot/commited-style-1/usr/13_0R-src/arm64.aarch64/stand/ficl/softcore.c > --- /usr/obj/BUILDs/13_0R-CA72-nodbg-clang-alt/.zfs/snapshot/commited-style-0/usr/13_0R-src/arm64.aarch64/stand/ficl/softcore.c 2021-05-04 13:45:14.463351000 -0700 > +++ /usr/obj/BUILDs/13_0R-CA72-nodbg-clang-alt/.zfs/snapshot/commited-style-1/usr/13_0R-src/arm64.aarch64/stand/ficl/softcore.c 2021-05-04 19:04:32.338203000 -0700 > @@ -4,7 +4,7 @@ > ** Words from CORE set written in FICL > ** Author: John Sadler (john_sadler@alum.mit.edu) > ** Created: 27 December 1997 > -** Last update: Tue May 4 13:45:14 PDT 2021 > +** Last update: Tue May 4 19:04:32 PDT 2021 > *******************************************************************/ > /* > ** DO NOT EDIT THIS FILE -- it is generated by softwords/softcore.awk > > # diff -u /usr/obj/BUILDs/13_0R-CA72-nodbg-clang-alt/.zfs/snapshot/commited-style-0/usr/13_0R-src/arm64.aarch64/toolchain-metadata.mk /usr/obj/BUILDs/13_0R-CA72-nodbg-clang-alt/.zfs/snapshot/commited-style-1/usr/13_0R-src/arm64.aarch64/toolchain-metadata.mk > --- /usr/obj/BUILDs/13_0R-CA72-nodbg-clang-alt/.zfs/snapshot/commited-style-0/usr/13_0R-src/arm64.aarch64/toolchain-metadata.mk 2021-05-04 10:55:26.030179000 -0700 > +++ /usr/obj/BUILDs/13_0R-CA72-nodbg-clang-alt/.zfs/snapshot/commited-style-1/usr/13_0R-src/arm64.aarch64/toolchain-metadata.mk 2021-05-04 16:14:24.513346000 -0700 > @@ -1,4 +1,4 @@ > -.info Using cached toolchain metadata from build at CA72_4c8G_ZFS on Tue May 4 10:55:26 PDT 2021 > +.info Using cached toolchain metadata from build at CA72_4c8G_ZFS on Tue May 4 16:14:24 PDT 2021 > _LOADED_TOOLCHAIN_METADATA=t > COMPILER_VERSION=110001 > X_COMPILER_VERSION=110001 > > > > I may run a 'target cortex-a7 (so: armv7) from aarch64' test > next. That was the context for the original discovery and > report. > > The armv7 builds and installs get the same sort of diff results as the aarch64 ones. So it does not look like I can readily reproduce the problem files that had differences. Given the time it takes to run the experiments, I would not expect to reproduce the problem on any given timescale. I'll stop the reporting as I go along in my activities --unless I end up with a repetition of the problem. === Mark Millard marklmi at yahoo.com ( dsl-only.net went away in early 2018-Mar)help
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