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Add dependency on headers with `in_addr` and `in_addr_t` type
definitions to ensure that these headers will be properly installed by
"install-libc" CMake target.
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This patch provides definitions for `pkey_*` functions for linux x86_64.
`pkey_alloc`, `pkey_free`, and `pkey_mprotect` are simple syscall
wrappers. `pkey_set` and `pkey_get` modify architecture-specific
registers. The logic for these live in architecture specific
directories:
* `libc/src/sys/mman/linux/x86_64/pkey_common.h` has a real
implementation
* `libc/src/sys/mman/linux/generic/pkey_common.h` contains stubs that
just return `ENOSYS`.
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This patch adds the posix function `inet_addr`. Since most of the
parsing logic is delegated to `inet_aton`, I have only included some
basic smoke tests for testing purposes.
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These functions should be declared in `stdlib.h`, not `wchar.h`, as
confusing as it is. Move them to the proper header file and matching
directories in src/ and test/ trees.
This was discovered while testing libc++ build against llvm-libc, which
re-declares functions like mbtowc in std-namespace in `<cstdlib>`
header, and then uses those functions in its locale implementation.
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These are simply implemented as specializations of strtofloatingpoint
for double / long double and for wchar_t. The unit tests are copied from
the strtod / strtold ones.
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Reverts llvm/llvm-project#166355
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_Exit(3) is a fairly simple syscall wrapper whereas exit(3) calls
atexit-registered functions + whole lot of stuff that require support
for sync primitives.
Splitting the tests allows testing the former easily (especially for new
port projects)
---------
Signed-off-by: Shreeyash Pandey <shreeyash335@gmail.com>
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This change follows the pattern of
315dfe5865962d8a3d60e21d1fffce5214fe54ef by making strtofloat also
accept wchar_t* strings
(in addition to regular char*). It uses overloads from wctype_utils or
specialized functions to ensure comparison with literal characters (or
literal strings) pick char or wchar_t variants based on the argument
type.
The wcstof implementation is added, with unit test cases copied from
strtof test suite.
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Closes #161461
- This is my first time contributing to libc's POSIX, so for reference I
used `clock_gettime` implementation for Linux. For convenience, here is
the description of `clock_settime` function
[behavior](https://www.man7.org/linux/man-pages/man3/clock_settime.3.html)
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Implements fchown
fixes: #166856
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This patch adds 4 macros in the `netinet/in.h` header, as specified by
POSIX standards.
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This patch refactors the logic to define each component of the
`math_errhandling` macro.
It assumes that math error handling is supported by the target and the C
library unless otherwise disabled in the preprocessor logic.
In addition to the refactoring, the support for error handling via
exceptions is explicitly disabled for Arm targets with no FPU, that is,
where `__ARM_FP` is not defined. This is because LLVM libc does not
provide a floating-point environment for Arm no-FP configurations (or at
least one with support for FP exceptions).
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Implements chown and getgid per the POSIX specification and adds
corresponding unit tests. getgid is added as it is required by the chown
unit tests. This PR will address #165785
Co-authored-by: shubh@DOE <shubhp@mbm3a24.local>
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`<wchar.h>` should at least include the forward declaration of `struct tm`,
since it's needed for the `wcsftime` declaration (also, see
https://man7.org/linux/man-pages/man0/wchar.h.0p.html).
Even though we don't yet have `wcsftime`, some downstream users (notably
- libcxx) expects to see `struct tm` declaration there, to re-declare it under
`std` namespace:
https://github.com/llvm/llvm-project/blob/c46bfed1a484d30cd251a9a225649d74e3bf0af5/libcxx/include/cwchar#L135
So, add this type declaration to llvm-libc version of `wchar.h` now.
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We need `<stdbool.h>` to support having "bool" members inside pthread
structs that may get included through `<pthread.h>` from C code prior to
C23.
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This makes the sorting behavior more uniform: functions and
macros are always sorted (separately), not only when merging.
This changes the sort order used for functions and other things
sorted by their symbol names. Symbols are sorted alphabetically
without regard to leading underscores, and then for identifiers
that differ only in the number of leading underscores, the fewer
underscores the earlier in the sort order. For the functions
declared in a generated header, adjacent names with and without
underscores will be grouped together without blank lines.
This is implemented by factoring the name field, equality, and
sorting support out of the various entity classes into a new
common superclass (hdrgen.Symbol).
This uncovered YAML's requirement to quote the string "NULL" to
avoid pyyaml parsing it as None (equivalent to Javascript null)
rather than a string.
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Fixes https://github.com/llvm/llvm-project/issues/129361
@michaelrj-google @PiJoules
---------
Signed-off-by: Shreeyash Pandey <shreeyash335@gmail.com>
Co-authored-by: Michael Jones <michaelrj@google.com>
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RFC https://discourse.llvm.org/t/rfc-bounds-checking-interfaces-for-llvm-libc/87685
Add internal support macros required by Annex K interface in LLVM libc.
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* Add FILE type declaration, as it should be presented in `<wchar.h>`,
as well as in `<stdio.h>`
* Fix argument type in `wcsrtombs` / `wcsnrtombs` function - it should
be restrict pointer to `mbstate_t`. Add restrict qualifier to internal
implementation as well.
This brings us closer to being able to build libcxx with wide-character
support against llvm-libc headers.
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This PR adds required macro definitions to `<nl_types.h>` header, so
that they're available to the code including it.
The header itself was added in 12abe8aed6dc724546cf93c94d7ff6abe864f28b,
together with stub definitions of the three required functions.
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Create a POSIX `<nl_types.h>` header with `catopen`, `catclose`, and
`catgets` function declarations.
Provide the stub/placeholder implementations which always return error.
This is consistent with the way
locales are currently (un-)implemented in llvm-libc.
Notably, providing `<nl_types.h>` fixes the last remaining issue with
building libc++ against llvm-libc
(on certain configuration of x86_64 Linux) after disabling threads and
wide-characters in libc++.
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This patch adds the implementation for `inet_aton` function. Since this
function is not explicitly included in POSIX, I have marked it with
`llvm_libc_ext`. It is widely available and commonly used, and can also
be used to implement `inet_addr`, which is included in POSIX.
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complex.yaml declares types cfloat16, cfloat128 and float128 in its
'types' section, causing the output complex.h to #include three headers
with names of the form "llvm-libc-types/cfloat16.h". But
include/CMakeLists.txt doesn't mention those types as dependencies in
the `add_header_macro` call for complex.h. As a result, cfloat16.h and
cfloat128.h are not installed by the 'install' target, but complex.h
still tries to to include them.
The third type header, float128.h, doesn't have this problem because the
`add_header_macro` math.h does mention it as a dependency. So I've added
all three headers as dependencies in complex.h, following the same
pattern, and now the install target installs the missing two headers.
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(#163658)
* Add a missing dependency to install struct_itimerval.h
* Add fseeko/ftello declarations to stdio.h
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Closes #159614
**Changes:**
- Initial implementation of rsqrt for single precision float
**Some small unrelated style changes to this PR (that I missed in my
rsqrtf16 PR):**
- Added extra - to the top comments to make it look nicer in
libc/shared/math/rsqrtf16.h
- Put rsqrtf16 inside of libc/src/__support/math/CMakeLists.txt in
sorted order
- Rearanged libc_math_function rsqrtf16 in Bazel to match alphabetical
order
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This PR includes only one of the fxdivi functions (rdivi). It uses a
polynomial function for initial approximation followed by 4
newton-raphson iterations to calculate the reciprocal and finally
multiplies the numerator with it to get the result.
---------
Signed-off-by: Shreeyash Pandey <shreeyash335@gmail.com>
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These types will be used in `arpa/inet.h` and `netinet/in.h`.
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#160404
- Implement POSIX function "faccessat"
- Remove redundant param in facessat syscall in access implementation,
faccessat syscall does not take a flags arg
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The implementation is based on the specifications from:
https://man7.org/linux/man-pages/man2/gethostname.2.html
Closes https://github.com/llvm/llvm-project/issues/126602
---------
Signed-off-by: ZakyHermawan <zaky.hermawan9615@gmail.com>
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Summary:
This was originally kept separate so it didn't pollute the name space,
but now I'm thinking it's just easier to bundle it in with the default
interface. This means that we'll have a bit of extra code for people
using the server.h file to handle libc opcodes, but it's minimal (3
functions) and it simplifies this.
I'm doing this because I'm hoping to move the GPU tester binary to
liboffload which handles `libc` opcodes internally except these. This is
the easier option compared to adding a hook to register custom handlers
there.
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Addresses #132818
Part of #95250
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Fixes
https://github.com/llvm/llvm-project/pull/156344#issuecomment-3256837826
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Currently, GCC can't parse `typedef _Complex __float128 cfloat128;`,
although `__typeof__` can be used as a workaround. Reported
https://gcc.gnu.org/PR121799 which was later considered as duplicate of
https://gcc.gnu.org/PR32187.
Some recent changes exposed it to GCC and then caused CI failure for
libc++. This patch adds a workaround for GCC.
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It was added in dd33f9cdef9f6209aa34713e1417f4a2e24e5ca6 to describe
thread-local errno, but is no longer used in the codebase (with the
exception of a single integration test, but the llvm-libc-provided
`#define _Thread_local thread_local` is not needed there anyway, since
`_Thread_local` is a keyword from C11 onwards.
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This is an implementation for template functions of localtime.
Update for this pull request: Implementation as been removed from this
pull request and will be added to a new one. This is because this pull
request is getting big. This pull request will only contain template
functions in order to implement localtime.
Update: The implementation is available in
https://github.com/zimirza/llvm-project/tree/localtime_implementation.
---------
Co-authored-by: Зишан Мирза <zmirza@tutanota.de>
Co-authored-by: Zishan Mirza <zmirza@posteo.de>
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Otherwise when installing the dlfcn.h header, there is a missing
reference to Dl_info.h, which causes compilation failures in some cases,
notably libunwind.
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This change fixes and closes some gaps in the YAML template for
producing the math.h header.
It adds some missing declarations (dadd/dsub function variants), correct
arguments and/or return type for other functions from this family (dsqrt
and ddiv), and add a missing fminimum_numl variant.
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This PR implements `atanpif16(x)` which computes
$\frac{\arctan(x)}{\pi}$ for half-precision floating-point numbers using
polynomial approximation with domain reduction.
## Mathematical Implementation
The implementation uses a 15th-degree Taylor polynomial expansion of
$\frac{\arctan(x)}{\pi}$ that's computed using
[`python-sympy`](https://www.sympy.org/en/index.html) and it's accurate
in $|x| \in [0, 0.5)$:
$$
g(x) = \frac{\arctan(x)}{\pi} \approx
\begin{aligned}[t]
& 0.318309886183791x \\
& - 0.106103295394597x^3 \\
& + 0.0636619772367581x^5 \\
& - 0.0454728408833987x^7 \\
& + 0.0353677651315323x^9 \\
& - 0.0289372623803446x^{11} \\
& + 0.0244853758602916x^{13} \\
& - 0.0212206590789194x^{15} + O(x^{17})
\end{aligned}
$$
---
To ensure accuracy across all real inputs, the domain is divided into
three cases with appropriate transformations:
**Case 1: $|x| \leq 0.5$**
Direct polynomial evaluation:
$$\text{atanpi}(x) = \text{sign}(x) \cdot g(|x|)$$
**Case 2: $0.5 < |x| \leq 1$**
Double-angle reduction using:
$$\arctan(x) = 2\arctan\left(\frac{x}{1 + \sqrt{1 + x^2}}\right)$$
$$\text{atanpi}(x) = \text{sign}(x) \cdot 2g\left(\frac{|x|}{1 + \sqrt{1
+ x^2}}\right)$$
**Case 3: $|x| > 1$**
Reciprocal transformation using
$$\arctan(x) = \frac{\pi}{2} - \arctan\left(\frac{1}{x}\right) \
\text{for} \ x \gt 0$$
$$\text{atanpi}(x) = \text{sign}(x) \cdot \left(\frac{1}{2} -
g\left(\frac{1}{|x|}\right)\right)$$
Closes #132212
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This patch adds the `exp10f16`, `exp2f16`, `expf16`, and `expm1f16` math
functions to the `math.h` header.
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This patch adds the `acos` math function to the NVPTX build. It also
adds the `sincos` math function to the `math.h` header.
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Fixes issue with `<csetjmp>` which requires `_Returns_twice` but in C++
mode
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#146226 with fixing asinpi MPFR number function and make it work when
mpfr < `4.2.0`
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This patch adds some hdrgen yaml for ioctl(). Otherwise the function
never actually ends up being available in a full build. This is the last
thing that is needed to enable turning on LIBCXX_ENABLE_RANDOM_DEVICE.
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