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The error cases are just as unlikely as the memory leaks to ever cause
real problems, but lets play it safe for correctness.
Reported-By: scan-build & clang
Gbp-Dch: Ignore
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Our profile says we spend about 5% of the time transforming the
hex digits into the binary format used by HashsumValue, all for
comparing them against the other strings. That makes no sense
at all.
According to callgrind, this reduces the overall instruction
count from 5,3 billion to 5 billion in my example, which
roughly matches the 5%.
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Several modules use std::array without including the
array header. Bad modules.
Some modules use STDOUT_FILENO and friends, or close()
without including unistd.h, where they are defined.
One module also uses WIFEXITED() without including
sys/wait.h.
Finally, environ is not specified to be defined in unistd.h. We
are required to define it ourselves according to POSIX, so let's
do that.
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Julian noticed on IRC that I fall victim to a lovely false friend by
calling referring to a 'planer' all the time even through these are
machines to e.g. remove splinters from woodwork ("make stuff plane").
The term I meant is written in german in this way (= with a single n)
but in english there are two, aka: 'planner'.
As that is unreleased code switching all instances without any
transitional provisions. Also the reason why its skipped in changelog.
Thanks: Julian Andres Klode
Gbp-Dch: Ignore
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Testing the current implementation can benefit from being able to be
feed an EIPP request and produce a fully compliant response. It is also
a great test for EIPP in general.
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For bugreports and co it could be handy to have the scenario and all the
settings used in it around later for inspection for EDSP like protocols.
EDSP might not be the most interesting as the user can still interrupt
the process before the solution is applied and users tend to have an
opinion on the "rightness" of a solution, so it is disabled by default.
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EDSP(-like) protocols are one-shot processes working on data which
exists only as long as they run (as they get feed via a pipe), so trying
to write a cache for it is pretty pointless, especially as it will
usually fail as the cache files tend to be owned by root, but the
process is run as a unpriviledged user (either _apt if called by root,
otherwise the user of the caller).
So this was in fact only observeable with our testcases which run as
non-root and the worst which happens is that a valid cache is overridden
with an invalid one which the next run will detect and not use.
Git-Dch: Ignore
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The classes are all marked as hidden, so changing them is no problem ABI
wise and will help with introducing protocols similar to EDSP.
The change has no observeable behavior difference, its just code
juggling.
Git-Dch: Ignore
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Currently an EDSP solver gets send basically all versions which means
the absolute count is the same, but that might not be true forever (and
with the skipping of rc-only versions it kinda is already) and even if
it were true, segfaulting on bad input seems wrong.
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Include <stdlib.h> to ensure that mkdtemp(3) is defined to improve
general portability and fix a specific build failure on Android.
Closes: #807367
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These virtual methods are implemented in hidden classes, so we can drop
them without breaking the ABI.
Git-Dch: Ignore
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Unlinking /dev/null is bad, we shouldn't do that. Also, we should print
at least a warning if we tried to unlink a file but didn't manage to
pull it of (ignoring the case were the file is /dev/null or doesn't
exist in the first place).
This got triggered by a relatively unlikely to cause problem in
pkgAcquire::Worker::PrepareFiles which would while temporary
uncompressed files (which are set to keep compressed) figure out that to
files are the same and prepare for sharing by deleting them. Bad move.
That also shows why not printing a warning is a bad idea as this hide
the error for in non-root test runs.
Git-Dch: Ignore
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This was discussed a while ago on #debian-apt and now that I see myself
making this mistake lets bite the bullet and fix it in the easy way out
version: Using a new name which fits with a similar named setter and
deprecate the old method instead of 'hostily' changing API.
Closes: #803471
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Git-Dch: Ignore
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The parser creates a preferences as well as an extended states file
based on the EDSP scenario file, which isn't the most efficient way of
dealing with this as thes text files have to be parsed again by another
layer of the code, but it needs the least changes and works good enough
for now. The 'apt' solver is in the end just a test solver like dump.
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Gbp-Dch: ignore
Reported-By: g++ -Wsuggest-override
Thanks: g++ -Wsuggest-override
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Now that we can dynamically create dependencies and provides as needed
rather than requiring to know with which architectures we will deal
before running we can allow the listparser to parse all records rather
than skipping records of "unknown" architectures.
This can e.g. happen if a user has foreign architecture packages in his
status file without dpkg knowing about this architecture (or apt
configured in this way).
A sideeffect is that now arch:all packages are (correctly) recorded as
available from any Packages file, not just from the native one – which
has its downsides for the resolver as mixed-arch source packages can
appear in different architectures at different times, but that is the
problem of the resolver and dealing with it in the parser is at best a
hack (and also depends on a helpful repository).
Another sideeffect is that his allows :none packages to appear in
Packages files again as we don't do any kind of checks now, but given
that they aren't really supported (anymore) by anyone we can live with
that.
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Trade deduplication of code for a bunch of new virtuals, so it is
actually visible how the different indexes behave cleaning up the
interface at large in the process.
Git-Dch: Ignore
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Sources are usually defined in sources.list (and co) and are pretty
stable, but once in a while a frontend might want to add an additional
"source" like a local .deb file to install this package (No support for
'real' sources being added this way as this is a multistep process).
We had a hack in place to allow apt-get and apt to pull this of for a
short while now, but other frontends are either left in the cold by this
and/or the code for it looks dirty with FIXMEs plastering it and has on
top of this also some problems (like including these 'volatile' sources
in the srcpkgcache.bin file).
So the biggest part in this commit is actually the rewrite of the cache
generation as it is now potentially a three step process. The biggest
problem with adding support now through is that this makes a bunch of
previously mostly unusable by externs and therefore hidden classes
public, so a bit of further tuneing on this now public API is in order…
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C++11 adds the 'override' specifier to mark that a method is overriding
a base class method and error out if not. We hide it in the APT_OVERRIDE
macro to ensure that we keep compiling in pre-c++11 standards.
Reported-By: clang-modernize -add-override -override-macros
Git-Dch: Ignore
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Doing this disables the implicit copy assignment operator (among others)
which would cause hovac if used on the classes as it would just copy the
pointer, not the data the d-pointer points to. For most of the classes
we don't need a copy assignment operator anyway and in many classes it
was broken before as many contain a pointer of some sort.
Only for our Cacheset Container interfaces we define an explicit copy
assignment operator which could later be implemented to copy the data
from one d-pointer to the other if we need it.
Git-Dch: Ignore
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To have a chance to keep the ABI for a while we need all three to team
up. One of them missing and we might loose, so ensuring that they are
available is a very tedious but needed task once in a while.
Git-Dch: Ignore
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This is mainly visible in the policy, so that you can now pin by b= and
let it only effect Packages files of this architecture and hence the
packages coming from it (which do not need to be from this architecture,
but very likely are in a normal repository setup).
If you should pin by architecture in this way is a different question…
Closes: 687255
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We used to read the Release file for each Packages file and store the
data in the PackageFile struct even through potentially many Packages
(and Translation-*) files could use the same data. The point of the
exercise isn't the duplicated data through. Having the Release files as
first-class citizens in the Cache allows us to properly track their
state as well as allows us to use the information also for files which
aren't in the cache, but where we know to which Release file they
belong (Sources are an example for this).
This modifies the pkgCache structs, especially the PackagesFile struct
which depending on how libapt users access the data in these structs can
mean huge breakage or no visible change. As a single data point:
aptitude seems to be fine with this. Even if there is breakage it is
trivial to fix in a backportable way while avoiding breakage for
everyone would be a huge pain for us.
Note that not all PackageFile structs have a corresponding ReleaseFile.
In particular the dpkg/status file as well as *.deb files have not. As
these have only a Archive property need, the Component property takes
over this duty and the ReleaseFile remains zero. This is also the reason
why it isn't needed nor particularily recommended to change from
PackagesFile to ReleaseFile blindly. Sticking with the earlier is
usually the better option.
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We have a bunch of classes which are of no use for the outside world,
but were still exported and so needed to preserve ABI/API. Marking them
as hidden to not export them any longer is a big API break in theory,
but in practice nobody is using them – as if they would its a bug.
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Strings like Section names or architectures are needed vary often.
Instead of writing them each time we need them, we deploy sharing for
these special strings. Until now, this was done with a linked list of
strings in which we would search, which was stored in the cache.
It turns out we can do this just as well in memory as well with a bunch
of std::map's.
In memory means here that it isn't available anymore if we have a partly
invalid cache, but that isn't much of a problem in practice as the
status file is compared to the other files we parse very small and includes
mostly duplicates, so the space we would gain by storing is more or less
equal to the size of the stored linked list…
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We had a wild mixture of (unsigned) int, long and long long here without
much sense, so this commit adds a few typedefs to get some sense in the
typesystem and ensures that a ID isn't sometimes computed as int, stored
as long and compared with a long long… as this could potentially bite us
later on as the size of the archive only increases over time.
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Git-Dch: Ignore
Reported-By: gcc -Wsuggest-attribute={pure,const,noreturn}
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Beside being a bit cleaner it hopefully also resolves oddball problems
I have with high levels of parallel jobs.
Git-Dch: Ignore
Reported-By: iwyu (include-what-you-use)
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Reported-By: gcc -Wunused-parameter
Git-Dch: Ignore
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change at the time of writing the strings, so first store it temporary
and then save the index in the (possibily new) pointer location
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- check with RealFileExists for scenario file as otherwise a directory
like one provided with RootDir triggers the usage of EDSP
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(and be it if it tries to announce that…)
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The breakage is just to big for now, so guard the change with
#ifndef APT_8_CLEANER_HEADERS and be nice to library users
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- implement a ModificationTime method for FileFd
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just writing stuff… it also reads and can work for both:
- APT talking to an external solver
- an external solver (understanding EDSP) talking to APT
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based on a very early draft for EDSP by Stefano
APT can now write a scenario as well as load most stuff from it.
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