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This should at least catch out blatantly bad patches that don't pass the
test suite with ASan. We don't do this to the integration tests since
they run on relatively limited-memory VMs and so it may not be super
safe to run an evaluator with leak driven garbage collection for them.
Fixes: https://git.lix.systems/lix-project/lix/issues/403
Fixes: https://git.lix.systems/lix-project/lix/issues/319
Change-Id: I5267b02626866fd33e8b4d8794344531af679f78
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What if you could find memory bugs in Lix without really trying very
hard? I've had variously scuffed patches to do this, but this is
blocked on boost coroutines removal at this point tbh.
Change-Id: Id762af076aa06ad51e77a6c17ed10275929ed578
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* changes:
devendor pegtl
update flake.lock
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there are no other uses for this yet, but asking for just a subset of
outputs does seem at least somewhat useful to have as a generic thing
Change-Id: I30ff5055a666c351b1b086b8d05b9d7c9fb1c77a
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If `:edit`ing a store path, don't reload repl afterwards
to avoid losing local variables: store is immutable,
so "editing" a store path is always just viewing it.
Resolves: https://git.lix.systems/lix-project/lix/issues/341
Change-Id: I3747f75ce26e0595e953069c39ddc3ee80699718
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limiting CA substitutions was a rather recent addition, and it used a
dedicated counter to not interfere with regular substitutions. though
this works fine it somewhat contradicts the documentation; job limits
should apply to all kinds of substitutions, or be one limit for each.
Change-Id: I1505105b14260ecc1784039b2cc4b7afcf9115c8
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all goals do this. it makes no sense to not notify a goal of EOF
conditions because this is the universal signal for "child done"
Change-Id: Ic3980de312547e616739c57c6248a8e81308b5ee
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both substitution goals add only this single fd to their wait set.
Change-Id: Ibf921f5bb3919106208a0871523b32c8f67fb3d3
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just update progress every time a goal has returned from work(). there
seem to be no performance penalties, and the code is much simpler now.
Change-Id: I288ee568b764ee61f40a498d986afda49987cb50
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into main
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Change-Id: I609a58985fc5210806d0959049a48976ae079c30
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Change-Id: I7afb53c929d297061dba6ec4a3ec7c6e3c6a553e
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* changes:
libstore/build: block io_uring
libstore/build: use an allowlist approach to syscall filtering
libstore/build: always treat seccomp setup failures as fatal
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* changes:
package.nix: remove dead code
diff-closures: remove gratuitous copy
tree-wide: NULL -> nullptr
libutil: rip out GNU Hurd support code
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Unfortunately, io_uring is totally opaque to seccomp, and while currently there
are no dangerous operations implemented, there is no guarantee that it remains
this way. This means that io_uring should be blocked entirely to ensure that
the sandbox is future-proof. This has not been observed to cause issues in
practice.
Change-Id: I45d3895f95abe1bc103a63969f444c334dbbf50d
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Previously, system call filtering (to prevent builders from storing files with
setuid/setgid permission bits or extended attributes) was performed using a
blocklist. While this looks simple at first, it actually carries significant
security and maintainability risks: after all, the kernel may add new syscalls
to achieve the same functionality one is trying to block, and it can even be
hard to actually add the syscall to the blocklist when building against a C
library that doesn't know about it yet. For a recent demonstration of this
happening in practice to Nix, see the introduction of fchmodat2 [0] [1].
The allowlist approach does not share the same drawback. While it does require
a rather large list of harmless syscalls to be maintained in the codebase,
failing to update this list (and roll out the update to all users) in time has
rather benign effects; at worst, very recent programs that already rely on new
syscalls will fail with an error the same way they would on a slightly older
kernel that doesn't support them yet. Most importantly, no unintended new ways
of performing dangerous operations will be silently allowed.
Another possible drawback is reduced system call performance due to the larger
filter created by the allowlist requiring more computation [2]. However, this
issue has not convincingly been demonstrated yet in practice, for example in
systemd or various browsers. To the contrary, it has been measured that the the
actual filter constructed here has approximately the same overhead as a very
simple filter blocking only one system call.
This commit tries to keep the behavior as close to unchanged as possible. The
system call list is in line with libseccomp 2.5.5 and glibc 2.39, which are the
latest versions at the point of writing. Since libseccomp 2.5.5 is already a
requirement and the distributions shipping this together with older versions of
glibc are mostly not a thing any more, this should not lead to more build
failures any more.
[0] https://github.com/NixOS/nixpkgs/issues/300635
[1] https://github.com/NixOS/nix/issues/10424
[2] https://github.com/flatpak/flatpak/pull/4462#issuecomment-1061690607
Change-Id: I541be3ea9b249bcceddfed6a5a13ac10b11e16ad
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In f047e4357b4f7ad66c2e476506bf35cab82e441e, I missed the behavior that if
building without a dedicated build user (i.e. in single-user setups), seccomp
setup failures are silently ignored. This was introduced without explanation 7
years ago (ff6becafa8efc2f7e6f2b9b889ba4adf20b8d524). Hopefully the only
use-case nowadays is causing spurious test suite successes when messing up the
seccomp filter during development. Let's try removing it.
Change-Id: Ibe51416d9c7a6dd635c2282990224861adf1ceab
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Musl stdout macro expands¹ to something that isn't a valid identifier,
so we get syntax errors when compiling usage of a method called stdout
with Musl's stdio.h.
[1]: https://git.musl-libc.org/cgit/musl/tree/include/stdio.h?id=ab31e9d6a0fa7c5c408856c89df2dfb12c344039#n67
Change-Id: I10e6f6a49504399bf8edd59c5d9e4e62449469e8
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getSelfExe is used in a few places re-execute nix.
Current code in this file uses ifdefs to support several
platforms, just keep doing that
Change-Id: Iecc2ada0101aea0c30524e3a1218594f919d74bf
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Change-Id: Ic0dfcfe27dbf13da4f7f74f5fab8ce6fa718d28f
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This was done originally because std::smatch does not accept `const char
*` as iterators. However, this was because we should have been using
std::cmatch instead.
Change-Id: Ibe73851fd39755e883df2d33d22fed72ac0a04ae
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It turns out skopeo *does* support not saying the tag, but I couldn't
find it in the docs.
Asking the author in https://github.com/containers/skopeo/issues/2354
yielded that this can be requested as `@@unknown-digest@@`.
So now we have a perfectly cromulent docker upload chain, yay!!
Change-Id: I256f3cbeef4fe28b3d68d0dda57f02cdaee3996b
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This is slightly more type safe and is more in line with modern C++.
Change-Id: Ia7a8df1c7788085020d1bdc941d6f9cee356144e
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Nobody has stepped up to add further support for Hurd since this code
appeared in 2010 or 2014. We don't need it.
Change-Id: I400b2031a225551ea3c71a3ef3ea9fdb599dfba3
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Use libprocstat to find garbage collector roots on FreeBSD.
Tested working on a FreeBSD machine, although there is no CI yet
Change-Id: Id36bac8c3de6cc4de94e2d76e9663dd4b76068a9
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Fixes: 72ee25b4025257fdaab7b8e8d5d1ccc83858fdab
Change-Id: Ib59386af1415a8ed4b53af24ec22a4ffa5e5877d
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Error is pretty large, and most goals do not fail. this alone more than
halves the size of Goal on x86_64-linux, from 720 bytes down to 344. in
derived classes the difference is not as dramatic, but even the largest
derived class (`LocalDerivationGoal`) loses almost 20% of its footprint
Change-Id: Ifda8f94c81b6566eeb3e52d55d9796ec40c7bce8
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Change-Id: I3c7f17d5492a16bb54480fa1aa384b96fba72d61
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the goals are either already using std::async and merely forgot to
remove std::thread vestiges or they emulate async with threads and
promises. we can simply use async directly everywhere for clarity.
Change-Id: I3f05098310a25984f10fff1e68c573329002b500
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under owner_less it's equivalent to insert(), only sometimes a little
bit faster because it does not construct a weak_ptr if the goal is in
the set already. this small difference in performance does not matter
here and c++23 will make insert transparent anyway, so we can drop it
Change-Id: I7cbd7d6e0daa95d67145ec58183162f6c4743b15
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this should be an optional. "busy" is not an *exit* code!
Change-Id: Ic231cb27b022312b1a7a7b9602f32845b7a9c934
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Change-Id: Ia3ebd434b17052b6760ce74d8e20025a72148613
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Change-Id: I1a051be495318a507d07f6d0a6b157616e26774c
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*accidentally* overriding a function is almost guaranteed to be an
error. overriding a function without labeling it as such is merely
bad style, but bad style that makes the code harder to understand.
Change-Id: Ic0594f3d1604ab6b3c1a75cb5facc246effe45f0
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Change-Id: Ib986ece0ab2eff83e7abd7f1f915cd8f761827ad
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Commit 0109368c3faf5516aeddde45e8dc3c33e7163838 missed to include a required
header, which is not noticed when the precompiled header is enabled because
it's included in that. Also include it in the file so that the build without
precompiled header works too.
Change-Id: Id7a7979684b64f937f7f8191612952d73c113015
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decompression" into main
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it" into main
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Due to a leftover from a previous version where the buffer was allocated on the
stack, the change introduced in commit 4ec87742a196d8ed8f41b41ef039706ce791448d
accidentally passes the size of a pointer as the size of the buffer to the
decompressor. Since the former is much smaller (usually 8 bytes instead of 64
kilobytes), this is safe, but leads to considerable overhead; most notably, due
to excessive progress reports, which happen for each chunk. Pass the proper
buffer size instead.
Change-Id: If4bf472d33e21587acb5235a2d99e3cb10914633
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This commit adds a new helper template function to gc-alloc.hh (which is
probably where you want to look at first, O great reviewer [custom file
ordering in review diffs when]), which uses a type argument to determine
the size to allocate, rather than making the caller use sizeof().
Change-Id: Ib5d138d91a28bdda304a80db24ea9fb08669ad22
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The purpose of this function has little to do with immutability. Value's
strings are never mutated, and the point of this function is to
singleton empty strings.
Change-Id: Ifd41dd952409d54e4d3de9ab59064e6928b0e480
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Change-Id: Icc4b367e4f670d47256f62a3a002cd248a5c2d3b
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SimpleLogger is not fully thread-safe, and all loggers that wrap it are
also not safe accordingly. this does not affect much, but in rare cases
it can cause interleaving of messages on stderr when used with the json
or raw log formats. the fix applied here is a bit of a hack, but fixing
this properly requires rearchitecting the logger infrastructure. nested
loggers are not the most natural abstraction here, and it is biting us.
Change-Id: Ifbf34fe1e85c60e73b59faee50e7411c7b5e7c12
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it's only used once, and even that one use is highly questionable. more
instances of warnOnce should be much more principled than this has been
Change-Id: I5856570c99cb44462e700d753d0c706a5db03c4b
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If useChroot = false, and user namespaces aren't available for some
reason (e.g. within a Docker container), this fixes a pointless warning
being emitted, as we would never attempt to use them even if they were
available.
Change-Id: Ibcee91c088edd2cd19e70218d5a5802bff8f537b
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This removes a *whole load* of variables from scope and enforces thread
boundaries with the type system.
There is not much change of significance in here, so the things to watch
out for while reviewing it are primarily that the destructor ordering
may have changed inadvertently, I think.
Change-Id: I3cd87e6d5a08dfcf368637407251db22a8906316
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