guix: fix vmov alignment issues with gcc 10.3.0 & mingw-w64

fanquake commented at 12:26 pm on April 1, 2022: member

This introduces a patch to our GCC (10.3.0) mingw-w64 compiler, in Guix, to make it avoid using aligned vmov instructions. This works around a longstanding issue in GCC, https://gcc.gnu.org/bugzilla/show_bug.cgi?id=54412, which was recently discovered to be causing issues, see #24726.

Note that distros like Debian are also patching around this issue, and that is where this patch comes from. This would also explain why we haven’t run into this problem earlier, in development builds. See: https://salsa.debian.org/mingw-w64-team/gcc-mingw-w64/-/blob/master/debian/patches/vmov-alignment.patch.

Fixes #24726. Alternative to #24727.

This introduces a patch to our GCC (10.3.0) mingw-w64 compiler, in Guix, to make
it avoid using aligned vmov instructions. This works around a longstanding issue
in GCC, https://gcc.gnu.org/bugzilla/show_bug.cgi?id=54412, which was recently
discovered to be causing issues, see #24726.

Note that distros like Debian are also patching around this issue, and that is
where this patch comes from. This would also explain why we haven't run into this
problem earlier, in development builds. See:
https://salsa.debian.org/mingw-w64-team/gcc-mingw-w64/-/blob/master/debian/patches/vmov-alignment.patch.

Fixes #24726.
Alternative to #24727.

See also:
https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=939559

d6fae988ef

fanquake added the label Windows on Apr 1, 2022

fanquake added the label Build system on Apr 1, 2022

fanquake added the label DrahtBot Guix build requested on Apr 1, 2022

hebasto commented at 12:27 pm on April 1, 2022: member

Concept ACK. Looks more preferable than #24727.

jonatack commented at 12:34 pm on April 1, 2022: member

Approach ACK on using the debian patch.

MarcoFalke added the label Needs backport (23.x) on Apr 1, 2022

MarcoFalke added this to the milestone 23.0 on Apr 1, 2022

laanwj commented at 1:16 pm on April 1, 2022: member

I’d normally consider this too hacky to be worth it, but as the patch is used by debian (which we’ve indirectly, through Ubuntu, already built with) there’s good precedent and I’m reasonably convinced this is safe, and think it’s ok to do instead of disabling AVX2 for the Windows build.

Edit: I’ve updated https://gist.github.com/laanwj/95d97cd218d99c68c1437115e0db9394/archive/9ba4b193a27e970b8866ba22389c89d198783bc7.zip to add the asm for _ZN14sha256d64_avx214Transform_8wayEPhPKh for this branch (in addition to that of 22.0 and 23.0rc3). I have confirmed that there are no more vmovdqa instructions (they’ve become vmovdqu). Otherwise, the code seems to be he same.

Assembly-checked ACK d6fae988eff78e28756d9b6219ec0239c420f51b

theuni commented at 2:11 pm on April 1, 2022: member

Whoa, impressive and quick detective work @laanwj and @fanquake!

This makes sense for release, but this leaves us with a known miscompile when building for win from source with a modern compiler, no? So the only realistic way to get a safe exe other than msvc I guess is the official binary or a guix self-build.

If that’s the case, I’d actually favor #24727.

laanwj commented at 2:20 pm on April 1, 2022: member

So the only realistic way to get a safe exe other than msvc I guess is the official binary or a guix self-build.

Or a Debian or Fedora packaged cross-compiler. It was guix with the “wrong” compiler. Not sure about mingw-w64 own (non-cross) binaries though.

theuni commented at 2:26 pm on April 1, 2022: member

So the only realistic way to get a safe exe other than msvc I guess is the official binary or a guix self-build.

Or a Debian or Fedora packaged cross-compiler. It was guix with the “wrong” compiler.

Right, sorry, I meant that vanilla gcc is known-broken. Or am I misunderstanding?

I guess if we’re confident enough that most users will encounter a patched version via their distro it’s not a concern.

hebasto commented at 2:30 pm on April 1, 2022: member

Approach ACK d6fae988eff78e28756d9b6219ec0239c420f51b.

Guix build on `x86_64`:

0$ find guix-build-$(git rev-parse --short=12 HEAD)/output/ -type f -print0 | env LC_ALL=C sort -z | xargs -r0 sha256sum
197076613fb9e9259b686a3e28f43f3c3efd0b717a3d13ff035657fd78b622e35  guix-build-d6fae988eff7/output/dist-archive/bitcoin-d6fae988eff7.tar.gz
229103515a199785d9f1de3ada9927f2bf9184e6d94edd46fdaf9750c9c74b598  guix-build-d6fae988eff7/output/x86_64-w64-mingw32/SHA256SUMS.part
37e2f18d5d4e9d1a2ad17848376b779be16566d3c5b0bffb850b4a00e084ea6b2  guix-build-d6fae988eff7/output/x86_64-w64-mingw32/bitcoin-d6fae988eff7-win64-debug.zip
41a3ee51f9e5bd1a0a08c222e52abb655481e8a40c6c3a7c5b5e3fa7d401dc241  guix-build-d6fae988eff7/output/x86_64-w64-mingw32/bitcoin-d6fae988eff7-win64-setup-unsigned.exe
58fe762415dcd3ac2106bd54611040ba815c4db105c8de508018c17510d409638  guix-build-d6fae988eff7/output/x86_64-w64-mingw32/bitcoin-d6fae988eff7-win64-unsigned.tar.gz
6a2cba27dd7a0dcf6654c0d8c052b2885ec48e84cdccaa398bf1473d800a4440b  guix-build-d6fae988eff7/output/x86_64-w64-mingw32/bitcoin-d6fae988eff7-win64.zip

Verified that the patch is the same as one in the Debian repo (module paths).

hebasto approved

hebasto commented at 2:41 pm on April 1, 2022: member

ACK d6fae988eff78e28756d9b6219ec0239c420f51b, tested Guix bitcoin-d6fae988eff7-win64.zip artifact on Windows 11 Pro 21H2:

0C:\Users\hebasto\Desktop\pr24736-avx2\bitcoin-d6fae988eff7>bin\bitcoind.exe -signet
12022-04-01T14:37:59Z Bitcoin Core version v23.99.0-gd6fae988eff78e28756d9b6219ec0239c420f51b (release build)
22022-04-01T14:37:59Z Signet derived magic (message start): 0a03cf40
32022-04-01T14:37:59Z Assuming ancestors of block 00000112852484b5fe3451572368f93cfd2723279af3464e478aee35115256ef have valid signatures.
42022-04-01T14:37:59Z Setting nMinimumChainWork=000000000000000000000000000000000000000000000000000000de26b0e471
52022-04-01T14:37:59Z Using the 'sse4(1way),sse41(4way),avx2(8way)' SHA256 implementation
6...

bitcoin/bitcoin#24726 is fixed for me.

fanquake commented at 5:43 pm on April 1, 2022: member

Guix Build (on x86_64):

 0bash-5.1# find guix-build-$(git rev-parse --short=12 HEAD)/output/ -type f -print0 | env LC_ALL=C sort -z | xargs -r0 sha256sum
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 9cc07af5d7f55fa836043a8f6d71c6ed2316abdda89fde84cb0ae1b4dbb256205  guix-build-d6fae988eff7/output/arm64-apple-darwin/bitcoin-d6fae988eff7-arm64-apple-darwin-unsigned.tar.gz
109a96dd87534b4e55c9945d74a008aaa27ff4bae2db20e710b8956063968d625f  guix-build-d6fae988eff7/output/arm64-apple-darwin/bitcoin-d6fae988eff7-arm64-apple-darwin.tar.gz
1197076613fb9e9259b686a3e28f43f3c3efd0b717a3d13ff035657fd78b622e35  guix-build-d6fae988eff7/output/dist-archive/bitcoin-d6fae988eff7.tar.gz
12b292159601a3d44b31d4d4502fd353680766dc3e0e66625fa9f1814f9244164f  guix-build-d6fae988eff7/output/powerpc64-linux-gnu/SHA256SUMS.part
1333bdc80c32eb8d9560f132825a3ba87231372985abab3cbbd7cdb571891a28eb  guix-build-d6fae988eff7/output/powerpc64-linux-gnu/bitcoin-d6fae988eff7-powerpc64-linux-gnu-debug.tar.gz
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154436f0add80cee47b85d041e8ddd2dbe0771f940f05b832f1b7c8c3269cd12c2  guix-build-d6fae988eff7/output/powerpc64le-linux-gnu/SHA256SUMS.part
16c6eb3e76f006204e8de0aafa591b130bf5333c6ace7454e602e35c218e82da23  guix-build-d6fae988eff7/output/powerpc64le-linux-gnu/bitcoin-d6fae988eff7-powerpc64le-linux-gnu-debug.tar.gz
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21c4aa832be0c7e354eaedc940c1c0657d3e8711120e2bc7631dcc702114ca409c  guix-build-d6fae988eff7/output/x86_64-apple-darwin/SHA256SUMS.part
22f5627d971be03f42d8b1cde0078d0a18a6f45ba49524e2f56f9d81f24a742323  guix-build-d6fae988eff7/output/x86_64-apple-darwin/bitcoin-d6fae988eff7-x86_64-apple-darwin-unsigned.dmg
238b6b47bd317e3e522e8e06e5c1b7802f3579f26ea563bcac0e42853192ba2d0b  guix-build-d6fae988eff7/output/x86_64-apple-darwin/bitcoin-d6fae988eff7-x86_64-apple-darwin-unsigned.tar.gz
24829bab1c4c9f660689cd7458cd43bab48e2ef1cca87fe40c88dcfa165ed2e264  guix-build-d6fae988eff7/output/x86_64-apple-darwin/bitcoin-d6fae988eff7-x86_64-apple-darwin.tar.gz
25526bfc98275304745ef5e0fd777138f5c3424c8cf69fd609bc1d828b5209b5e8  guix-build-d6fae988eff7/output/x86_64-linux-gnu/SHA256SUMS.part
2651340f607294006dd0c715b6928ab65edb0ee6f53b27799e253dd86bbc400a1e  guix-build-d6fae988eff7/output/x86_64-linux-gnu/bitcoin-d6fae988eff7-x86_64-linux-gnu-debug.tar.gz
27e4b78350b27b7773e7cd4f1fe95657b5feb82e322245888f21e2d48cbcd59752  guix-build-d6fae988eff7/output/x86_64-linux-gnu/bitcoin-d6fae988eff7-x86_64-linux-gnu.tar.gz
2829103515a199785d9f1de3ada9927f2bf9184e6d94edd46fdaf9750c9c74b598  guix-build-d6fae988eff7/output/x86_64-w64-mingw32/SHA256SUMS.part
297e2f18d5d4e9d1a2ad17848376b779be16566d3c5b0bffb850b4a00e084ea6b2  guix-build-d6fae988eff7/output/x86_64-w64-mingw32/bitcoin-d6fae988eff7-win64-debug.zip
301a3ee51f9e5bd1a0a08c222e52abb655481e8a40c6c3a7c5b5e3fa7d401dc241  guix-build-d6fae988eff7/output/x86_64-w64-mingw32/bitcoin-d6fae988eff7-win64-setup-unsigned.exe
318fe762415dcd3ac2106bd54611040ba815c4db105c8de508018c17510d409638  guix-build-d6fae988eff7/output/x86_64-w64-mingw32/bitcoin-d6fae988eff7-win64-unsigned.tar.gz
32a2cba27dd7a0dcf6654c0d8c052b2885ec48e84cdccaa398bf1473d800a4440b  guix-build-d6fae988eff7/output/x86_64-w64-mingw32/bitcoin-d6fae988eff7-win64.zip

jarolrod commented at 6:59 am on April 4, 2022: member

GUIX hashes on x86, my hashes match fanquake’s latest round

 06c19da96916339afe15f3ce8fe98ca9187fdf0fdde6e98004314fca5493f38b7  guix-build-d6fae988eff7/output/aarch64-linux-gnu/SHA256SUMS.part
 1239299236943857cc9e6e487ab2a40ce7bda4051857c98a3b61eaf6c4aba8222  guix-build-d6fae988eff7/output/aarch64-linux-gnu/bitcoin-d6fae988eff7-aarch64-linux-gnu-debug.tar.gz
 25e561074dcce8d1a00b034d14e4f9dce881a51f75d3cc7a3704309fa4cb8a2cc  guix-build-d6fae988eff7/output/aarch64-linux-gnu/bitcoin-d6fae988eff7-aarch64-linux-gnu.tar.gz
 34bfd173fa8dcc94eec541a3494816966807dcde1e34d642df60fd35af6077daa  guix-build-d6fae988eff7/output/arm-linux-gnueabihf/SHA256SUMS.part
 4dd4ab4ab0624f6aa5b47ff781c012e73ce3f4111e9007d911d072063d32d531e  guix-build-d6fae988eff7/output/arm-linux-gnueabihf/bitcoin-d6fae988eff7-arm-linux-gnueabihf-debug.tar.gz
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15c6eb3e76f006204e8de0aafa591b130bf5333c6ace7454e602e35c218e82da23  guix-build-d6fae988eff7/output/powerpc64le-linux-gnu/bitcoin-d6fae988eff7-powerpc64le-linux-gnu-debug.tar.gz
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31a2cba27dd7a0dcf6654c0d8c052b2885ec48e84cdccaa398bf1473d800a4440b  guix-build-d6fae988eff7/output/x86_64-w64-mingw32/bitcoin-d6fae988eff7-win64.zip

laanwj commented at 9:40 am on April 4, 2022: member

Concept and code review ACK d6fae988eff78e28756d9b6219ec0239c420f51b

laanwj merged this on Apr 4, 2022

laanwj closed this on Apr 4, 2022

fanquake referenced this in commit db8a5d6094 on Apr 4, 2022

fanquake commented at 9:54 am on April 4, 2022: member

Being backported in #24755.

fanquake deleted the branch on Apr 4, 2022

fanquake removed the label Needs backport (23.x) on Apr 4, 2022

sidhujag referenced this in commit 66206f4616 on Apr 4, 2022

fanquake removed the label DrahtBot Guix build requested on Apr 4, 2022

MarcoFalke referenced this in commit 1ea76767d0 on Apr 5, 2022

DrahtBot commented at 5:08 am on April 6, 2022: member

Guix builds

File	commit 31b1c67cf6d74dd655fafe97e36868b3f8752280(master)	commit 949d23789041615074c9b9290a758595d8986501(master and this pull)
SHA256SUMS.part	`f714de21b4e14d0d...`	`b3f524c16f18a163...`
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DrahtBot locked this on Apr 6, 2023

guix: fix vmov alignment issues with gcc 10.3.0 & mingw-w64 #24736

Guix build on x86_64:

Guix builds

Guix build on `x86_64`: