This is a rather naive implementation, but serves as a first pass at
determining the GMT offset for a time zone at a particular point in
time. This implementation ignores DST (because we are not parsing any
RULE entries yet), and ignores any offset patterns of the form "Mon>4"
or "lastSun".
For example, generate "Etc/GMT+12" as "Etc_GMT_Ahead_12" (instead of as
"Etc_GMT_P12"). A little clearer what the name means without having to
know off-hand what "P" was representing.
This CMakeLists.txt was basically copy-pasted from LibUnicode, where the
generated data is separated into its own library. This was to let other
libraries / applications decide if they actually want to link the data
because it is so large. LibTimeZone's generated data is significantly
smaller, so this separation really isn't needed.
The generate_mapping helper generates a series of structs like:
Array<SomeType, 1> s_mapping_key_0 {};
Array<SomeType, 2> s_mapping_key_1 {};
Array<SomeType, 3> s_mapping_key_2 {};
Array<Span<SomeType const>> s_mapping { {
s_mapping_key_0.span(),
s_mapping_key_1.span(),
s_mapping_key_2.span(),
} };
Where the names of the struct were generated by the format_mapping_name
lambda inside the helper. Rather than this lambda making assumptions on
how each generator wants to name its structs, add a parameter for the
caller to provide a naming formatter.
This is because the TimeZoneData generator will want pretty specific
identifier formatting rules.
Currently, we define a CaseInsensitiveStringTraits structure for String.
Using this structure for StringView involves allocating a String from
that view, and a second string to convert that intermediate string to
lowercase.
This defines CaseInsensitiveStringViewTraits (and the underlying helper
case_insensitive_string_hash) to avoid allocations.
The special URL links (help://man) and the application opening links now
work on the man page website. While the page links are translated
correctly, the application launch can't be implemented. For this reason,
an explanatory error page is shown instead.
The URLs of the form `help://man/<section>/<page>` link to another help
page inside the help application. All previous relative page links are
replaced by this new form. This doesn't change any behavior but it looks
much nicer :^)
Note that man doesn't handle these new links, but the previous relative
links didn't work either.
Through links in the help page, the user can directly launch the app
whose help page is currently viewed. The idea for this feature came up
in the discussion of #11557
(https://github.com/SerenityOS/serenity/pull/11557#issuecomment-1004830728
). The intention is that the user can simply open the app they are
currently trying to understand, and play around with it, learn by doing,
or follow along with any guide that may be present in the help page. It
feels very great :^)
Link handling is now split up between open_page and open_url. While
open_page can handle any sort of input and is responsible for handling
history UI, open_url deals in URLs and takes one of a few different
actions depending on the exact URL given. Currently, only file:// URLs
are handled but this will change in the next few commits.
Note that this commit breaks relative URLs on purpose. After the new
help:// URLs, they won't be needed anyways. The reasoning is that many
URLs not specifically pointing to man page directories will cause a
(non-deadly) unveil violation in `real_path_for`. This specifically
concerns the new application launch URLs that are added in the next
commit.
Previously when the delete key was pressed, only the first selected
cell index would have been deleted. This commit remedies that by first
checking when more than a single index is selected.
NoAllocationGuard is an RAII stack guard that prevents allocations
while it exists. This is done through a thread-local global flag which
causes malloc to crash on a VERIFY if it is false. The guard allows for
recursion.
The intended use case for this class is in real-time audio code. In such
code, allocations are really bad, and this is an easy way of dynamically
enforcing the no-allocations rule while giving the user good feedback if
it is violated. Before real-time audio code is executed, e.g. in LibDSP,
a NoAllocationGuard is instantiated. This is not done with this commit,
as currently some code in LibDSP may still incorrectly allocate in real-
time situations.
Other use cases for the Kernel have also been added, so this commit
builds on the previous to add the support both in Userland and in the
Kernel.
For "destructive" disallowance of allocations throughout the system,
Thread gains a member that controls whether allocations are currently
allowed or not. kmalloc checks this member on both allocations and
deallocations (with the exception of early boot) and panics the kernel
if allocations are disabled. This will allow for critical sections that
can't be allowed to allocate to fail-fast, making for easier debugging.
PS: My first proper Kernel commit :^)
Some archive tools can open ext2 images like an archive, which is very
convenient for people that already have such tools like 7zip.
This also contains information for WSL users on where to find the
_disk_image in Explorer.
The purpose of the PageDirectory::m_page_tables map was really just
to act as ref-counting storage for PhysicalPage objects that were
being used for the directory's page tables.
However, this was basically redundant, since we can find the physical
address of each page table from the page directory, and we can find the
PhysicalPage object from MemoryManager::get_physical_page_entry().
So if we just manually ref() and unref() the pages when they go in and
out of the directory, we no longer need PageDirectory::m_page_tables!
Not only does this remove a bunch of kmalloc() traffic, it also solves
a race condition that would occur when lazily adding a new page table
to a directory:
Previously, when MemoryManager::ensure_pte() would call HashMap::set()
to insert the new page table into m_page_tables, if the HashMap had to
grow its internal storage, it would call kmalloc(). If that kmalloc()
would need to perform heap expansion, it would end up calling
ensure_pte() again, which would clobber the page directory mapping used
by the outer invocation of ensure_pte().
The net result of the above bug would be that any invocation of
MemoryManager::ensure_pte() could erroneously return a pointer into
a kernel page table instead of the correct one!
This whole problem goes away when we remove the HashMap, as ensure_pte()
no longer does anything that allocates from the heap.
This is a normative change to the Intl spec:
https://github.com/tc39/ecma402/commit/20e5c26
Note that this doesn't actually affect us. Its purpose is to provide the
hour-cycle to BestFitFormatMatcher. This AO is implementation defined,
and ours just invokes BasicFormatMatcher, which doesn't use this field.
We could now have LibUnicode generate this field and use it to find a
better format pattern, though.
When compiled using clang, an ambiguity error is detected between
`class AK::Time` aliased to `::Time` and the `struct ::Time` provided
in `GenerateTimeZoneData.cpp`. Solve this by moving most of the code in
an anonymous namespace.
Previously, upon reaching the target, the player is presented with
potentially two dialog boxes: one asking if the user wants to
continue endlessly and another showing the player's statistics,
which would only be shown if the user does not want to continue.
This commit consolidates these into a single dialog box that shows
the relevant statistics and asks the user if they want to continue
endlessly.
When opening 2048's settings, it translates the target tile into
a power of 2. Previously, it was done incorrectly, causing the
resulting value to be off by one, and the number would increase
every time one opens, saves and closes the settings. With this
change, it now works as expected.
In the last few commits, a second patch was added to the LLVM toolchain,
and it no longer uses our binutils patch. This commit changes the CI
cache keys accordingly, in order to prevent unnecessary rebuilds of both
toolchains when only one is changed.
The Clang toolchain's cache now only takes into account patches that
begin with `llvm`, and the GNU toolchain excludes those from the hash
calculation. We now also hash the two CMake cache files that we use for
building LLVM and its runtime libraries.
We erroneously appended ".so" after the base name for the library,
so we ended up checking for the existence of e.g. `libc.so.so`,
which obviously didn't exist, so we overwrote the existing libraries
when we rebuilt the toolchain.
Our build of LLVM's objcopy now supports the single missing feature
(--update-section) that previously forced us to use the one from GNU
Binutils. This means that there is no reason anymore to build Binutils
alongside LLVM's tools.
This commit backports the LLVM commit that adds support for the
`--update-section` flag to llvm-objcopy. We use this feature of GNU
objcopy to embed the symbol map in the kernel.
The corresponding LLVM Phabricator Differential Revision can be found
here: https://reviews.llvm.org/D112116
This patch is identical to the upstream commit, except for two hunks
that had to be changed as they didn't apply cleanly.
