Installing clang-format-11 doesn't seem to work if it's done before
we've installed LLVM. I must admit I didn't try to get to the bottom
of the issue, since installing it after seems to work.
Two problems fixed:
* an old version of clang-format get installed by default (6.0).
* git-clang-format is not present, only git-clang-format-<version> (e.g. git-clang-format-6.0).
Solution:
* install clang-format-11 with explicit version
* make symlink git-clang-format to the latest version of git-clang-format-<version>
Differential Revision: https://reviews.llvm.org/D93201
When the allocator is only explicitly convertible from other specializations
of itself, the new version of std::allocate_shared would not work because
it would try to do an implicit conversion. This patch fixes the problem
and adds a test so that we don't fall into the same trap in the future.
Checking that `T` is constructible from `Args...` is technically not
required by the Standard, although any implementation will obviously
error out if that's not satisfied. However, this check is incompatible
with using Allocator construction in the control block (upcoming change
as part of implementing P0674), so I'm removing it now to reduce the
upcoming diff as much as possible.
Differential Revision: https://reviews.llvm.org/D93246
This commit is a step towards making it easier to add support for arrays
in allocate_shared. Adding support for arrays will require writing multiple
functions, and the current complexity of writing allocate_shared is
prohibitive for understanding.
Differential Revision: https://reviews.llvm.org/D93130
In addition to making the code a lot easier to grasp by localizing many
helper functions to the only file where they are actually needed, this
will allow creating helper functions that depend on allocator_traits
outside of <memory>.
This is done as part of implementing array support in allocate_shared,
which requires non-trivial array initialization algorithms that would be
better to keep out of <memory> for sanity. It's also a first step towards
splitting up our monolithic headers into finer grained ones, which will
make it easier to reuse functionality across the library. For example,
it's just weird that we had to define `addressof` inside <type_traits>
to avoid circular dependencies -- instead it's better to implement those
in true helper headers.
Differential Revision: https://reviews.llvm.org/D93074
- std::reference_wrapper
- std::function
- std::mem_fn
While I'm here, remove _VSTD:: qualification from calls to `declval`
because it takes no arguments and thus isn't susceptible to ADL.
Differential Revision: https://reviews.llvm.org/D92884
Everywhere, normalize the whitespace to `::new (EXPR) T`.
Everywhere, normalize the spelling of the cast to `(void*)EXPR`.
Without the cast to `(void*)`, the expression triggers ADL on GCC.
(I think this is a GCC bug: https://gcc.gnu.org/bugzilla/show_bug.cgi?id=98249)
Even if it doesn't trigger ADL, it still seems incorrect to use any argument
that's not exactly `(void*)` because that opens the possibility of overload
resolution picking a user-defined overload of `operator new`, which would be
wrong.
Differential Revision: https://reviews.llvm.org/D93153
Otherwise they come out in random (inode?) order.
Also `chmod +x` the generator, and re-run it. Somehow on Marek's
machine it produced \r\n line endings?! Open all files with
`newline='\n'` so that (if the Python3 docs are correct)
that won't happen again.
Differential Revision: https://reviews.llvm.org/D93137
This simplifies the implementation, and it appears to be equivalent since
make_shared was allocating memory with std::allocator anyway.
Differential Revision: https://reviews.llvm.org/D93071
Generally these calls aren't vulnerable to ADL because they involve only
primitive types. The ones in <list> and <vector> drag in namespace std
but that's OK; the ones in <fstream> and <strstream> are vulnerable
iff `CharT` is an enum type, which seems far-fetched.
But absolutely zero of them *need* ADL to happen; so in my opinion
they should all be consistently qualified, just like calls to any
other (non-user-customizable) functions in namespace std.
Also: Include <cstring> and <cwchar> in <__string>.
We seemed to be getting lucky that <memory> included <iterator>
included <iosfwd> included <wchar.h>. That gave us the
global-namespace `wmemmove`, but not `_VSTD::wmemmove`.
This is now fixed.
I didn't touch these headers:
<ext/__hash> uses strlen, safely
<support/ibm/locale_mgmt_aix.h> uses memcpy, safely
<string.h> uses memchr and strchr, safely
<wchar.h> uses wcschr, safely
<__bsd_locale_fallbacks.h> uses wcsnrtombs, safely
Differential Revision: https://reviews.llvm.org/D93061
This matches how libc++ does it in all other C++ headers
(that is, headers not ending in ".h").
We need to include <cstring> if we want to use `_VSTD::memmove`
instead of unqualified ADL `memmove`. Even though ADL doesn't
physically matter in <charconv>'s specific case, I'm trying
to migrate libc++ to using `_VSTD::memmove` for all cases
(because some of them do matter, and this way it's easier to
grep for outliers).
Differential Revision: https://reviews.llvm.org/D92875
This is the first of a series of patches leading up to the implementation
of P0674r1, i.e. array support in allocate_shared. I am splitting this
up into multiple patches because the overall change is very tricky and
I want to isolate potential breakage.
Idea from D92525.
This script globs include/ directory and updates the tests in test/libcxx.
This patch does not generate module.modulemap nor CMakeLists.txt.
Reviewed By: ldionne, #libc
Differential Revision: https://reviews.llvm.org/D92656
This attribute permits a typedef to be associated with a class template
specialization as a preferred way of naming that class template
specialization. This permits us to specify that (for example) the
preferred way to express 'std::basic_string<char>' is as 'std::string'.
The attribute is applied to the various class templates in libc++ that have
corresponding well-known typedef names.
This is a re-commit. The previous commit was reverted because it exposed
a pre-existing bug that has since been fixed / worked around; see
PR48434.
Differential Revision: https://reviews.llvm.org/D91311
The goal was to add coverage for back-deployment over the filesystem
library, but it was added in macOS 10.15, not 10.14.
Differential Revision: https://reviews.llvm.org/D92937
The interesting change here is that we no longer consider `__convert_to_integral`
an ADL customization point for the user's types. I think the new behavior
is defensible. The old behavior had come from D7449, where Marshall explicitly
said "people can't define their own [`__convert_to_integral` overloads]."
Differential Revision: https://reviews.llvm.org/D92814
It adds coverage for back-deploying to a system that contains the
filesystem library, which 10.9 (currently our only back-deployment
target in the CI) does not have.
Differential Revision: https://reviews.llvm.org/D92794
This change exposed a pre-existing issue with deserialization cycles
caused by a combination of attributes and template instantiations
violating the deserialization ordering restrictions; see PR48434 for
details.
A previous commit attempted to work around PR48434, but appears to have
only been a partial fix, and fixing this properly seems non-trivial.
Backing out for now to unblock things.
This reverts commit 98f76adf4e and
commit a64c26a47a.
This attribute permits a typedef to be associated with a class template
specialization as a preferred way of naming that class template
specialization. This permits us to specify that (for example) the
preferred way to express 'std::basic_string<char>' is as 'std::string'.
The attribute is applied to the various class templates in libc++ that have
corresponding well-known typedef names.
Differential Revision: https://reviews.llvm.org/D91311
The issue didn't change the behaviour which is tested in libcxx/test/std/input.output/filesystems/class.path/path.member/path.concat.pass.cpp.
The change to use string_view instead of string is not strictly necessary.
<filesystem> was added in commit 998a5c8831 (Implement <filesystem>).
Reviewed By: #libc, ldionne
Differential Revision: https://reviews.llvm.org/D92731
This is the the minimal change introduced in [[ https://reviews.llvm.org/D88599 | D88599 ]] to unblock the controversial change and discussion of proper separation between thread from thread id which will continue in D88599.
This patch will address the differences of definition of pthread_t on z/OS vs. Linux and other OS. Main trick to make the code work on z/OS relies on redefining libcpp_thread_id type and _LIBCPP_NULL_THREAD macro. This is necessary to separate initialization of libcxx_thread_id from the one of __libcxx_thread_t;
Reviewed By: #libc, ldionne
Differential Revision: https://reviews.llvm.org/D91875
The synopsis now reflects what's implemented. It does NOT reflect
all of what's specified in C++20. The "constexpr in C++20" markings
are still missing from these 12 algorithms, because they are still
unimplemented by libc++:
reverse partition sort nth_element next_permutation prev_permutation
push_heap pop_heap make_heap sort_heap partial_sort partial_sort_copy
All of the above algorithms were excluded from [P0202].
All of the above algorithms were made constexpr in [P0879] (along with
swap_ranges, iter_swap, and rotate — we've already implemented those three).
Differential Revision: https://reviews.llvm.org/D92255
These had been waiting on the ability to use `std::copy` from
constexpr code (which in turn had been waiting on the ability to
use `is_constant_evaluated()` to switch between `memmove` and non-`memmove`
implementations of `std::copy`). That work landed a while ago,
so these algorithms can all be constexpr in C++20 now.
Simultaneously, update the tests for the set algorithms.
- Use an element type with "equivalent but not identical" values.
- The custom-comparator tests now pass something different from `operator<`.
- Make the constexpr coverage match the non-constexpr coverage.
Differential Revision: https://reviews.llvm.org/D92255
previously, invocations of std::sort(T**, T**) casted the arguments to
(size_t *). this breaks sorting on systems for which pointers don't fit
in a size_t. change the cast to (uintptr_t *) and add a test.
Differential Revision: https://reviews.llvm.org/D92190
It was added in commit 0b71bf7939, "[libcxx] [test] Add a test for conversions between wchar_t, utf8, char16_t, char32_t and windows native narrow code pages"
This implements the std::filesystem parts of P0482 (which is already
marked as in progress), and applies the actions that are suggested
in P1423.
Differential Revision: https://reviews.llvm.org/D90222
Some C++20 headers weren't added properly to all three of these
test files. Add them, and take the time to normalize the formatting
so that
diff <(grep '#include' foo.cpp) <(grep '#include' bar.cpp)
shows no diffs (except that `no_assert_include` deliberately
excludes `<cassert>`).
- Add macro guards to <{barrier,latch,semaphore}>.
- Add macro guards to <experimental/simd>.
- Remove an include of <cassert> from <semaphore>.
- Instead, include <cassert> in the semaphore tests.
Differential Revision: https://reviews.llvm.org/D92525
Also:
* Fix header line in all status tables.
* Use C++20 instead of C++2a.
Reviewed By: ldionne, #libc, miscco
Differential Revision: https://reviews.llvm.org/D92306
Also, add notes about exporting ABI symbols.
Later, we can add notes about using git-clang-format before sending a patch for review.
Reviewed By: ldionne, #libc
Differential Revision: https://reviews.llvm.org/D92300
The static_assert in "libcxx/include/memory" was the main offender here,
but then I figured I might as well `git grep -i instantat` and fix all
the instances I found. One was in user-facing HTML documentation;
the rest were in comments or tests.
I used a lot of `git grep` to find places where `std::` was being used
outside of comments and assert-messages. There were three outcomes:
- Qualified function calls, e.g. `std::move` becomes `_VSTD::move`.
This is the most common case.
- Typenames that don't need qualification, e.g. `std::allocator` becomes `allocator`.
Leaving these as `_VSTD::allocator` would also be fine, but I decided
that removing the qualification is more consistent with existing practice.
- Names that specifically need un-versioned `std::` qualification,
or that I wasn't sure about. For example, I didn't touch any code in
<atomic>, <math.h>, <new>, or any ext/ or experimental/ headers;
and I didn't touch any instances of `std::type_info`.
In some deduction guides, we were accidentally using `class Alloc = typename std::allocator<T>`,
despite `std::allocator<T>`'s type-ness not being template-dependent.
Because `std::allocator` is a qualified name, this did parse as we intended;
but what we meant was simply `class Alloc = allocator<T>`.
Differential Revision: https://reviews.llvm.org/D92250
Since we know exactly which identifiers we expect to find in `chrono`,
a using-directive seems like massive overkill. Remove the directives
and qualify the names as needed.
One subtle trick here: In two places I replaced `*__p` with `*__p.get()`.
The former is an unqualified call to `operator*` on a class type, which
triggers ADL and breaks the new test. The latter is a call to the
built-in `operator*` on pointers, which specifically
does NOT trigger ADL thanks to [over.match.oper]/1.
Differential Revision: https://reviews.llvm.org/D92243
x86-64 ILP32 mode (x32) uses 32-bit size_t, so share the code with ix86 to zero out padding bits, not with x86-64 LP64 mode.
Reviewed By: #libc, ldionne
Differential Revision: https://reviews.llvm.org/D91349
The 5f12f4ff90 commit suppress printing of
inline namespace names in diagnostics by default that breaks the libc++
iterator test, which expects __1 in the namespace.
This patch fixes the test by supporting a test case without __1 in the
namespace.
Differential Revision: https://reviews.llvm.org/D92142
I think people were sometimes parenthesizing `(foo::max)()` out of
misplaced concern that an unparenthesized `foo::max()` would trip up
Windows' `max(a,b)` macro. However, this is not the case: `max(a,b)`
should be tripped up only by an unparenthesized call to `foo::max(a,b)`,
and in fact we already do `_VSTD::max(a,b)` all over the place anyway
without any guards.
However, in order to do it without guards, we must also
wrap the header in _LIBCPP_PUSH_MACROS, which <span> was not.
Differential Revision: https://reviews.llvm.org/D92240
This patch updates algorithms in <numeric> to use std::move
based on p0616r0. Moving values instead of copying them
creates huge speed improvements (see the paper for details).
Differential Revision: https://reviews.llvm.org/D61170
We create threads using std::thread in various places in the test suite.
However, the usual std::thread constructor may not work on all platforms,
e.g. on platforms where passing a stack size is required to create a thread.
This commit introduces a simple indirection that makes it easier to tweak
how threads are created inside the test suite on various platforms. Note
that tests that are purposefully calling std::thread's constructor directly
(e.g. because that is what they're testing) were not modified.
By encoding ABI-affecting properties in the name of the ABI list, it
makes it clear when an ABI list test should or should not be available,
and what results we should expect.
Note that we clearly don't encode all ABI-affecting parameters in the
name right now -- I just ported over what we supported in the code that
was there previously. As we encounter configurations that we wish to
support but produce different ABI lists, we can add those to the ABI
identifier and start supporting them.
This commit also starts checking the ABI list in the CI jobs that run
a supported configuration. Eventually, all configurations should have
a generated ABI list and the test should even run implicitly as part of
the Lit test suite.
Differential Revision: https://reviews.llvm.org/D92194
We don't actually update the ABI lists at every release -- it's too much
work, since we'd technically have to do it even for minor releases.
Furthermore, I don't think anybody uses those (I certainly don't rely
on them for anything).
Instead, it is better to rely on the ABI list changelog and the canonical
ABI list that we always keep up to date. If one wants to know what symbols
were shipped in a specific release, that can be discovered easily using
Git, which is a superior tool than keeping textual copies of old versions.
Using sysctl requires including headers that are considered internal on
Linux, like <sys/sysctl.h> & friends. Instead, sysconf is defined by POSIX
(and we have a fallback for Windows), so all the systems we support should
be happy with just sysconf.
Differential Revision: https://reviews.llvm.org/D92135
I'm not 100% sure what the issue actually is since I can't reproduce it
locally, however what I explain in the comment is my best attempt to
explain what's going on.
Differential Revision: https://reviews.llvm.org/D92131
FreeBSD's locale data uses the same U+2027 separator as Glibc 2.27 and newer.
Reviewed By: #libc, emaste, ldionne
Differential Revision: https://reviews.llvm.org/D91165
This will fix remaining failures on gcc-9 buildbot: http://lab.llvm.org:8011/#/builders/101.
gcc-8 and gcc-9 do not support constexpr destructors nor constexpr allocation.
Fix gcc warnings: -Wconversion, -Wpragmas.
Currently, papers and issues are in separate .csv files (that is easier to update), but I can put them inline.Transforming current html tables into rst are done by the script (attached to the patch FYI but I'll remove it before committing).
I'll of course update RST files before committing to match any modifications that may happen in master branch.
This patch moves the status pages in www/ to RST format in docs/.
It also does some other minor changes: fix copyright year and broken comment end, adds substitutions for coherence (and add colors, but that can be removed easily).
It adds as well redirects from old to new status pages.
Reviewed By: ldionne, #libc
Differential Revision: https://reviews.llvm.org/D92076
This should make the builder http://lab.llvm.org:8011/#/builders/101/ happy.
It uses gcc-9 and not Tip-Of-Trunk as its name indicates BTW.
GCC-10 passes all these tests.
Fix gcc warnings: -Wsign-compare, -Wparentheses, -Wpragmas.
Reviewed By: ldionne, #libc, #libc_abi
Differential Revision: https://reviews.llvm.org/D92099
There were a couple of places where we needed to call the underlying
platform's aligned allocation/deallocation function. Instead of having
the same logic all over the place, extract the logic into a pair of
helper functions __libcpp_aligned_alloc and __libcpp_aligned_free.
The code in libcxxabi/src/fallback_malloc.cpp looks like it could be
simplified after this change -- I purposefully did not simplify it
further to keep this change as straightforward as possible, since it
is touching very important parts of the library.
Also, the changes in libcxx/src/new.cpp and libcxxabi/src/stdlib_new_delete.cpp
are basically the same -- I just kept both source files in sync.
The underlying reason for this refactoring is to make it easier to support
platforms that provide aligned allocation through C11's aligned_alloc
function instead of posix_memalign. After this change, we'll only have
to add support for that in a single place.
Differential Revision: https://reviews.llvm.org/D91379
Azat Khuzhin