Date: Tue, 4 May 2021 10:01:15 -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? Message-ID: <3FC6BCDD-5865-4B5D-8238-3EC38AD4E78C@yahoo.com> In-Reply-To: <27B5086A-7C98-4AE6-885A-CC7C7BD2F64B@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>
next in thread | previous in thread | raw e-mail | index | archive | help
On 2021-May-4, at 08:51, Mark Millard <marklmi at yahoo.com> wrote:
> On 2021-May-4, at 06:01, Ed Maste <emaste at freebsd.org> wrote:
>=20
>> On Mon, 3 May 2021 at 22:26, Mark Millard <marklmi@yahoo.com> wrote:
>>>=20
>>> But I'll note that I've built and stalled py37-diffoscope
>>> (new to me). A basic quick test showed that it reports:
>>>=20
>>> W: diffoscope.main: Fuzzy-matching is currently disabled as the =
"tlsh" module is unavailable.
>>=20
>> I just looked up tlsh - its "A Locality Sensitive Hash"; I presume
>> diffoscope uses it to infer file renames. I believe the warning
>> emitted here should have no impact on the output we're looking for.
>=20
> Okay.
>=20
>> As far as the utf-8 issues go, diffoscope requires a utf-8 locale and
>> I suspect that is the issue. If you don't have LANG set already, try
>> setting LANG=3DC.UTF-8 in your environment.
>=20
> That is not the issue for the UnicodeDecodeError:
>=20
> # echo $LANG
> C.UTF-8
>=20
> # diffoscope /.zfs/snapshot/2021-04-*-01:40:48-0/bin/sh
> $<3/>2021-05-04 08:49:21 W: diffoscope.main: Fuzzy-matching is =
currently disabled as the "tlsh" module is unavailable.
> $<3/>Traceback (most recent call last):
> File "/usr/local/lib/python3.7/site-packages/diffoscope/main.py", =
line 745, in main
> sys.exit(run_diffoscope(parsed_args))
> File "/usr/local/lib/python3.7/site-packages/diffoscope/main.py", =
line 677, in run_diffoscope
> difference =3D load_diff_from_path(path1)
> File =
"/usr/local/lib/python3.7/site-packages/diffoscope/readers/__init__.py", =
line 31, in load_diff_from_path
> return load_diff(codecs.getreader("utf-8")(fp), path)
> File =
"/usr/local/lib/python3.7/site-packages/diffoscope/readers/__init__.py", =
line 35, in load_diff
> return JSONReaderV1().load(fp, path)
> File =
"/usr/local/lib/python3.7/site-packages/diffoscope/readers/json.py", =
line 33, in load
> raw =3D json.load(fp)
> File "/usr/local/lib/python3.7/json/__init__.py", line 293, in load
> return loads(fp.read(),
> File "/usr/local/lib/python3.7/codecs.py", line 504, in read
> newchars, decodedbytes =3D self.decode(data, self.errors)
> UnicodeDecodeError: 'utf-8' codec can't decode byte 0xb7 in position =
18: invalid start byte
>=20
Well, the list of differing files is huge. But this seems to
be .gnu_debuglink content for the area it is in. I'll note
that I did installworld but not the likes of distrib-dirs
or distribution this time.
This test did buildworld to two distinct directories:
zroot/BUILDs/13_0R-CA72-nodbg-clang 5.13G 118G 5.13G =
/usr/obj/BUILDs/13_0R-CA72-nodbg-clang
zroot/BUILDs/13_0R-CA72-nodbg-clang-alt 4.28G 118G 4.28G =
/usr/obj/BUILDs/13_0R-CA72-nodbg-clang-alt
and installworld to 2 distinct directories:
zroot/DESTDIRs/13_0R-CA72-instwrld-alt 1.44G 118G 1.44G =
/usr/obj/DESTDIRs/13_0R-CA72-instwrld-alt
zroot/DESTDIRs/13_0R-CA72-instwrld-norm 1.44G 118G 1.44G =
/usr/obj/DESTDIRs/13_0R-CA72-instwrld-norm
Previously (armv7 target) I had built, installed, rebuilt
to same directory (after clean-out) and installed to an
alternate directory. That had gotten only a few files
different but I do not know (yet) if it was the procedural
difference that made the difference.
Prefix of the list of different files this time:
# diff -rq /usr/obj/DESTDIRs/13_0R-CA72-instwrld-norm/ =
/usr/obj/DESTDIRs/13_0R-CA72-instwrld-alt/ | more
Files /usr/obj/DESTDIRs/13_0R-CA72-instwrld-norm/bin/[ and =
/usr/obj/DESTDIRs/13_0R-CA72-instwrld-alt/bin/[ differ
Files /usr/obj/DESTDIRs/13_0R-CA72-instwrld-norm/bin/cat and =
/usr/obj/DESTDIRs/13_0R-CA72-instwrld-alt/bin/cat differ
Files /usr/obj/DESTDIRs/13_0R-CA72-instwrld-norm/bin/chflags and =
/usr/obj/DESTDIRs/13_0R-CA72-instwrld-alt/bin/chflags differ
Files /usr/obj/DESTDIRs/13_0R-CA72-instwrld-norm/bin/chio and =
/usr/obj/DESTDIRs/13_0R-CA72-instwrld-alt/bin/chio differ
. . .
Looking, aarch64 seems to typically get a back-to-back
sequence of 4 bytes different in native programs in my
builds:
# cmp -x /usr/obj/DESTDIRs/13_0R-CA72-instwrld-norm/bin/cat =
/usr/obj/DESTDIRs/13_0R-CA72-instwrld-alt/bin/cat
00003bd4 1d 65
00003bd5 eb a3
00003bd6 bb ca
00003bd7 8e 1a
# ls -Tld /usr/obj/DESTDIRs/13_0R-CA72-instwrld-norm/bin/cat =
/usr/obj/DESTDIRs/13_0R-CA72-instwrld-alt/bin/cat
-r-xr-xr-x 1 root wheel 18448 May 4 08:55:01 2021 =
/usr/obj/DESTDIRs/13_0R-CA72-instwrld-alt/bin/cat
-r-xr-xr-x 1 root wheel 18448 May 3 23:16:36 2021 =
/usr/obj/DESTDIRs/13_0R-CA72-instwrld-norm/bin/cat
Sections:
Idx Name Size VMA LMA File off =
Algn
. . .
25 .gnu_debuglink 00000010 0000000000000000 0000000000000000 =
00003bc8 2**0
CONTENTS, READONLY
00003bd4-00003bc8 =3D=3D 0xC
# cmp -x /usr/obj/DESTDIRs/13_0R-CA72-instwrld-norm/bin/chflags =
/usr/obj/DESTDIRs/13_0R-CA72-instwrld-alt/bin/chflags
00002208 88 a1
00002209 e6 40
0000220a 60 94
0000220b bf ce
# ls -Tld /usr/obj/DESTDIRs/13_0R-CA72-instwrld-norm/bin/chflags =
/usr/obj/DESTDIRs/13_0R-CA72-instwrld-alt/bin/chflags
-r-xr-xr-x 1 root wheel 11440 May 4 08:55:01 2021 =
/usr/obj/DESTDIRs/13_0R-CA72-instwrld-alt/bin/chflags
-r-xr-xr-x 1 root wheel 11440 May 3 23:16:36 2021 =
/usr/obj/DESTDIRs/13_0R-CA72-instwrld-norm/bin/chflags
Sections:
Idx Name Size VMA LMA File off =
Algn
. . .
25 .gnu_debuglink 00000014 0000000000000000 0000000000000000 =
000021f8 2**0
CONTENTS, READONLY
00002208-000021f8 =3D=3D 0x10
# cmp -x /usr/obj/DESTDIRs/13_0R-CA72-instwrld-norm/bin/chio =
/usr/obj/DESTDIRs/13_0R-CA72-instwrld-alt/bin/chio
000050c4 6b 3e
000050c5 08 ca
000050c6 7a 2f
000050c7 5d 64
# ls -Tld /usr/obj/DESTDIRs/13_0R-CA72-instwrld-norm/bin/chio =
/usr/obj/DESTDIRs/13_0R-CA72-instwrld-alt/bin/chio
-r-xr-xr-x 1 root wheel 23728 May 4 08:55:01 2021 =
/usr/obj/DESTDIRs/13_0R-CA72-instwrld-alt/bin/chio
-r-xr-xr-x 1 root wheel 23728 May 3 23:16:37 2021 =
/usr/obj/DESTDIRs/13_0R-CA72-instwrld-norm/bin/chio
Sections:
Idx Name Size VMA LMA File off =
Algn
. . .
25 .gnu_debuglink 00000010 0000000000000000 0000000000000000 =
000050b8 2**0
CONTENTS, READONLY
000050c4-000050b8 =3D=3D 0xC
For all I know, some individual byte(s) in the 4 might accidentally
match sometimes. The addition offset after .gnu_debuglink's file
offset does vary (0xC and 0x10 above).
The content of those differences do not look like
file path components, for example the 0x08 byte.
I do build with:
# Avoid stripping but do not control host -g status as well:
DEBUG_FLAGS+=3D
#
WITH_REPRODUCIBLE_BUILD=3D
WITH_DEBUG_FILES=3D
But that was true for the earlier armv7 target example
that I reported that only got a few files with
differences.
=3D=3D=3D
Mark Millard
marklmi at yahoo.com
( dsl-only.net went
away in early 2018-Mar)
Want to link to this message? Use this URL: <https://mail-archive.FreeBSD.org/cgi/mid.cgi?3FC6BCDD-5865-4B5D-8238-3EC38AD4E78C>