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With this change, our DWARF 5 support is nearly feature-complete.
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Clang emits this form at all debug levels.
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These forms were introduced in DWARF5, and have a fair deal of
advantages over the more traditional encodings: they reduce the size of
the binary and the number of relocations.
GCC does not emit these with `-g1` by default, but Clang does at all
debug levels.
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This will be needed when we add `DW_FORM_strx*` and `DW_FORM_addrx*`
support, which requires us to fetch `DW_AT_str_offsets_base` and
`DW_AT_addr_base` attributes from the parent compilation unit. This
can't be done as we read the values, because it would create infinite
recursion (as we might try to parse the compilation unit's
`DW_FORM_strx*` encoded name before we get to the attribute). Having
getters ensures that we will perform lookups if they are needed.
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Our Clang toolchain uses versioned names for its shared libraries,
meaning that our applications link against `libc++.so.1.0`, not simply
`libc++.so`. Without this change, the LLVM runtime libraries are
excluded from backtraces, which makes debugging toolchain issues harder.
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There is no need to have a user-defined copy constructor that simply
calls the base class's copy constructor. By having the compiler generate
it for us, Span is made trivially copyable, so it can be passed in
registers.
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This allows the linker to link against these dynamic libraries when
compiling libc++/libunwind, without having to do a separate
bootstrapping LibC build.
Without this change, libc++ would fail to pick up the need to link to
`LibPthread` if no prior builds of it existed. Because of this, we'd
immediately have an assertion failure in SystemServer, as mutexes are
used for the safe construction of function-local static variables.
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The `wcsxfrm` function copies a wide character string into a buffer,
such that comparing the new string against any similarly pre-processed
string with `wcscmp` produces the same result as if the original strings
were compared with `wcscoll`.
Our current `wcscoll` implementation is simply an alias for `wcscmp`, so
`wcsxfrm` needs to perform no actions other than copying the string.
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This is how the standard specifies it; similarly to the already
correctly declared wcschr function.
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The ELAST macro is used on many systems to refer to the largest possible
valid errno value. LLVM's libc++ uses errno values of ELAST+1 and
ELAST+2 internally, and defines an arbitrary fallback value for
platforms which don't have the macro. This means that it's possible for
their internal errno numbers could coincide with values we actually use,
which would be a very bad thing.
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The C standard specifies that this forward-declaration be present in
wchar.h, and is needed in order to build libstdc++.
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This part is also quite needed when opening files from drag-and-drop
events.
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Note our Attribute class is what the spec refers to as just "Attr". The
main differences between the existing implementation and the spec are
just that the spec defines more fields.
Attributes can contain namespace URIs and prefixes. However, note that
these are not parsed in HTML documents unless the document content-type
is XML. So for now, these are initialized to null. Web pages are able to
set the namespace via JavaScript (setAttributeNS), so these fields may
be filled in when the corresponding APIs are implemented.
The main change to be aware of is that an attribute is a node. This has
implications on how attributes are stored in the Element class. Nodes
are non-copyable and non-movable because these constructors are deleted
by the EventTarget base class. This means attributes cannot be stored in
a Vector or HashMap as these containers assume copyability / movability.
So for now, the Vector holding attributes is changed to hold RefPtrs to
attributes instead. This might change when attribute storage is
implemented according to the spec (by way of NamedNodeMap).
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The `-w` option is enforced when setting variables.
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ProcFSGlobalInode now calls `write_bytes()`, `truncate()` and
`set_mtime()` on its associated component. This allows us to write 0 or
1 to a ProcFSSystemBoolean component to toggle a boolean value.
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We are doing nonstandard stuff with our headers, so SDL assumed that
both iconv and dlopen are available inside LibC, which they aren't.
Fix that by adding a dependency on libiconv and adding additional
linker flags.
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I originally implemented this as something to use the new sequence
wrapper, however, after having a look at uses with grep.app, it's used
often, for example:
- Bootstrap 5 Dropdowns
- Polymer
- Angular
- Closure
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This adds the ParamatizedType, as `Vector<String>` doesn't encode the
full type information. It is a separate struct as you can't have
`Vector<Type>` inside of `Type`. This also makes Type RefCounted
because I had to make parse_type return a pointer to make dynamic
casting work correctly.
The reason I made it RefCounted instead of using a NonnullOwnPtr is
because it causes compiler errors that I don't want to figure out right
now.
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Previously, when the last layer got deleted, the active layer was
set to nullptr, causing a crash.
Now, we create a new transparent background layer with the image
dimensions instead.
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Previously, this was returning the serialization for the whole style
rule, which isn't what we want.
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Also fixed that serializing an attribute selector never output the
value.
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