It's not clear to me if `proc_pidinfo()` or `proc_pidfdinfo()` can
actually return negative values, the syscall wrappers convert `-1` into
zero and the semantics suggest that negative values don't make sense,
but just to be safe we'll preserve the int type until we've checked that
it's a positive value.
Fixes: lix-project/lix#548
Change-Id: If575aec6b1e27dba63091c7a0316c7b3788747cd
some promises capture `this`. we could also allocate a shared state,
but this thing doesn't really need to ever be moved anyway. so there.
Change-Id: I50b5c44684a8ab4e984b1323de21f97ace4a864a
not doing this can freeze slots until the goal that occupied them is
freed (rather than simply complete), and then can freeze the system.
fixes#549
Change-Id: I042df04222f8ffbaa18ef4a4eae6cbd6f89b679e
This is done because the one in nixpkgs has several problems and we
don't want to conflict with them fixing those problems:
- not building shared libs
- not building debuginfo (more critical for us due to
lix-project/lix#549)
- not setting the correct cmake build type
- not setting the correct cxxflags to build the coroutine library
- not building with clang (required for the coroutine library since gcc
is known to miscompile coroutines *in kj*).
CC: lix-project/lix#551
Fixes: lix-project/lix#550
Change-Id: Ia5b78dc1809963fdd1a8203b127a216cb575d751
This workaround was for the stdenv not being set when callPackage'ing
package.nix for some of the stranger CI outputs.
Change-Id: I2acdd6efa721b90dd3cb04358544d25d591ff084
The old behavior results in lots of concatenations happening for no good
reason and is an artifact of the technical limitations of the old parser
(combined with some lack of care for such details).
Change-Id: I0d78d6220ca6aeaa10bc437e48e08bf7922e0bb3
This is only a minor semantical distinction, but we should be able to
properly test it, and the parser tests rely on show for that.
Change-Id: I25e868cf9544e30cdff17deb5fd50a434e0f367e
This commit should faithfully reproduce the old behavior down to the
bugs. The new code is a lot more readable, all quirks are well
documented, and it is overall much more maintainable.
Change-Id: I629585918e4f2b7d296b6b8330235cdc90b7bade
This failed due to https://github.com/NixOS/nixpkgs/pull/346945, which
makes a second lowdown-unsandboxed that works in nix builds, and the
regular lowdown has executables that fail closed when the sandbox setup
fails.
The actual failure here is only visible on nixos-unstable at the moment,
not 24.05, but this commit should fix it up for all versions.
Fixes: lix-project/lix#547
Change-Id: I50c0ecb59518ef01a7c0181114c1b4c5a7c6b78b
A better fix than in 104448e75d, hence a
revert + the fix.
It turns out that this commit has the side-effect that when having e.g.
`StrictHostKeyChecking=accept-new` for a remote builder, the warnings à la
Warning: Permanently added 'builder' (ED25519) to the list of known hosts.
actually end up in the derivation's log whereas hostkey verification
errors don't, but only in the stderr of the `nix-build` invocation
(which was the motivation for the patch).
This change writes the stderr from the build-hook to
* the daemon's stderr, so that the SSH errors appear in the journal
(which was the case before 104448e75d)
* the client's stderr, as a log message
* NOT to the drv log (this is handled via `handleJSONLogMessage`)
I tried to fix the issue for legacy-ssh as well, but failed and
ultimately decided to not bother.
I know that we'll sooner or later replace the entire component, however
this is the part of the patch I have working for a while, so I figured I
might still submit it for the time being.
Change-Id: I21ca1aa0d8ae281d2eacddf26e0aa825272707e5
When the git default branch is not set to master the installcheck
test suite fails. This patch adjusts the test setup scripts to
ignore the system and user git config files.
GIT_CONFIG_SYSTEM is set to /dev/null to ignore /etc/gitconfig
GIT_CONFIG_GLOBAL is not set because the global config files
are loaded from $HOME or $XDG_CONFIG_HOME which we already
reset.
git documentation: https://git-scm.com/docs/git#Documentation/git.txt-codeGITCONFIGGLOBALcode
Change-Id: Ie73bbed1db9419c9885b9d57e4edb7a4047d5cce
While debugging something else I observed that latest `main` ignores
`Control-C` on `sudo nix-build`.
After reading through the capnproto docs, it seems as if the promise
must be fulfilled to actually terminate the `promise.wait()` below.
This also applies to scenarios such as stopping the client
(`nix-build`), but the builders on the daemon-side are still running,
i.e. closes#540
Co-authored-by: eldritch horrors <pennae@lix.systems>
Change-Id: I9634d14df4909fc1b65d05654aad0309bcca8a0a
So we received a report that the thread pool crashed due to an
Interrupted exception.
Relevant log tail:
copying path '/nix/store/0kal2k73inviikxv9f1ciaj39lkl9a87-etc-os-release' to 'ssh://192.168.0.27'...
Lix crashed. This is a bug. We would appreciate if you report it along with what caused it at https://git.lix.systems/lix-project/lix/issues with the following information included:
error (ignored): error: interrupted by the user
Exception: nix::Interrupted: error: interrupted by the user
Relevant stack trace:
4# __cxa_rethrow in /nix/store/22nxhmsfcv2q2rpkmfvzwg2w5z1l231z-gcc-13.3.0-lib/lib/libstdc++.so.6
5# nix::ignoreExceptionExceptInterrupt(nix::Verbosity) in /nix/store/ghxr2ykqc3rrfcy8rzdys0rzx9ah5fqj-lix-2.92.0-dev-pre20241005-ed9b7f4/lib/liblixutil.so
6# nix::ThreadPool::doWork(bool) in /nix/store/ghxr2ykqc3rrfcy8rzdys0rzx9ah5fqj-lix-2.92.0-dev-pre20241005-ed9b7f4/lib/liblixutil.so
7# 0x00007FA7A00E86D3 in /nix/store/22nxhmsfcv2q2rpkmfvzwg2w5z1l231z-gcc-13.3.0-lib/lib/libstdc++.so.6
8# 0x00007FA79FE99A42 in /nix/store/3dyw8dzj9ab4m8hv5dpyx7zii8d0w6fi-glibc-2.39-52/lib/libc.so.6
9# 0x00007FA79FF1905C in /nix/store/3dyw8dzj9ab4m8hv5dpyx7zii8d0w6fi-glibc-2.39-52/lib/libc.so.6
Notably, this is *not* in the main thread, so this implies that the
thread didn't get joined properly before their destructors got called.
That, in turn, should have only possibly happened because join() threw
on a previous iteration of the loop joining threads, I think. Or if it
threw while in the ThreadPool destructor. Either way we had better stop
letting Interrupted fall out of our child threads!
If:
- Interrupted was thrown inside the action in the main thread: it would
have fallen out of doWork if state->exception was already set and got
caught by ThreadPool::process, calling shutdown() and the join loop
which would crash the process entirely.
- Interrupted was thrown inside the action on a secondary thread: it
would have been caught and put into the exception field and then
possibly rethrown to fall out of the thread (since it was previously
ignoreExceptionExceptInterrupt).
The one possible hole in this hypothesis is that there is an "error
(ignored)" line in there implying that at least one Interrupted got
eaten by an ignoreExceptionInDestructor. It's also unclear whether this
got reordered because of stderr buffering.
Fixes: lix-project/lix#542
Change-Id: I322cf050da660af78f5cb0e08ec6e6d27d09ac76
This is capped at 12 because 3.7 seconds of startup is painful enough
and 5.5 seconds with 24 was more annoying.
Change-Id: I327db40fd98deaa5330cd9cf6de99fb07b2c1cb0
I am tired of bad shell scripts, let me write bad python quickly
instead. It's definitely, $100%, better.
This is not planned as an immediate replacement of the old test suite,
but we::jade would not oppose tests getting ported.
What is here is a mere starting point and there is a lot more
functionality that we need.
Fixes: lix-project/lix#488
Change-Id: If762efce69030bb667491b263b874c36024bf7b6
I followed @pennae's advice and moved the constructor definition of
`AttrName` from the header file `nixexpr.hh` to `nixexpr.cc`.
Change-Id: I733f56c25635b366b11ba332ccec38dd7444e793
The approach that was taken here was to add default values to the type
definitions rather than specify them whenever they are missing.
Now the only remaining warning is '-Wunused-parameter' which @jade said
is usually counterproductive and that we can just disable it:
lix-project/lix#456 (comment)
So this change adds the flags '-Wall', '-Wextra' and
'-Wno-unused-parameter', so that all warnings are enabled except for
'-Wunused-parameter'.
Change-Id: Ic223a964d67ab429e8da804c0721ba5e25d53012
There was a bug report about a potential call to `memcpy` with a null
pointer which is not reproducible:
lix-project/lix#492
This occurred in `src/libstore/filetransfer.cc` in `InnerSource::read`.
To ensure that this doesn't happen, an early return is added before
calling `memcpy` if the length of the data to be copied is 0.
This change also adds a test that ensures that when `InnerSource::read`
is called with an empty file, it throws an `EndOfFile` exception.
Change-Id: Ia18149bee9a3488576c864f28475a3a0c9eadfbb
these two functions are now nearly trivial and much better inline into
makeGoalCommon. keeping them separate also separates information about
goal completion flows and how failure information ends up in `Worker`.
Change-Id: I6af86996e4a2346583371186595e3013c88fb082
we can use our newfound powers of Goal::work Is A Real Promise to remove
completed goals from continuation promises. apart from being much easier
to follow it's also a lot more efficient because we have the iterator to
the item we are trying to remove, skipping a linear search of the cache.
Change-Id: Ie0190d051c5f4b81304d98db478348b20c209df5
Goal::work() is a fully usable promise that does not rely on the worker
to report completion conditions. as such we no longer need the `notify`
field that enabled this interplay. we do have to clear goal caches when
destroying the worker though, otherwise goal promises may (incorrectly)
keep goals alive due to strong shared pointers created by childStarted.
Change-Id: Ie607209aafec064dbdf3464fe207d70ba9ee158a
derivation goals still hold a BuildResult member variable since parts of
these results of accumulated in different places, but the Goal class now
no longer has such a field. substitution goals don't need it at all, and
derivation goals should also be refactored to not drop their buildResult
Change-Id: Ic6d3d471cdbe790a6e09a43445e25bedec6ed446
the field is simply duplicated between the two, and now that we can
return WorkResults from Worker::run we no longer need both of them.
Change-Id: I82fc47d050b39b7bb7d1656445630d271f6c9830
this will be needed to move all interesting result fields out of Goal
proper and into WorkResult. once that is done we can treat goals as a
totally internal construct of the worker mechanism, which also allows
us to fully stop exposing unclear intermediate state to Worker users.
Change-Id: I98d7778a4b5b2590b7b070bdfc164a22a0ef7190
since we now propagate goal exceptions properly we no longer need to
check topGoals for a reason to abort early. any early abort reasons,
whether by exception or a clean top goal failure, can now be handled
by inspecting the goal result in the main loop. this greatly reduces
goal-to-goal interactions that do not happen at the main loop level.
since the underscore-free name is now available for use as variables
we'll migrate to that where we currently use `_topGoals` for locals.
Change-Id: I5727c5ea7799647c0a69ab76975b1a03a6558aa6
drop childException since it's no longer needed. also makes
waitForInput, childFinished, and childTerminated redundant.
Change-Id: I05d88ffd323c5b5c909ac21056162f69ffb0eb9f
there's no reason to have the worker set information on goals that the
goals themselves return from their entry point. doing this in the goal
`work()` function is much cleaner, and a prerequisite to removing more
implicit strong shared references to goals that are currently running.
Change-Id: Ibb3e953ab8482a6a21ce2ed659d5023a991e7923
this simplifies the worker loop, and lets us remove it entirely later.
note that ideally only one promise waiting for interrupts should exist
in the entire system. not one per event loop, one per *process*. extra
interrupt waiters make interrupt response nondeterministic and as such
aren't great for user experience. if anything wants to react to aborts
caused by explicit interruptions, or anything else, those things would
be much better served using RAII guards such as Finally (or KJ_DEFER).
Change-Id: I41d035ff40172d536e098153c7375b0972110d51
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