The epoll_wait syscall is equivalent to calling epoll_pwait with a null
sigset. This is useful to support systems that have epoll_pwait but not
epoll_wait.
Much of unistd involves modifying files. The tests for these functions
need to use libc_make_test_file_path which didn't exist when they were
first implemented. This patch adds most of unistd to the bazel along
with the corresponding tests. Tests that modify directories had to be
disabled since bazel doesn't seem to handle them properly.
The intent of the test is to check that: 1. The type generic macros are
defined. 2. Those macros dispatch to the correct underlying function.
The issue is that when new functionality is added to our stdbit.h without
rolling out the new entrypoint to all targets, this test breaks because our
generated stdbit.h will not contain declarations for the underlying function.
In that case, we should just declare the underlying functions first before
including our generated stdbit.h which just contains declarations. A definition
is a declaration, but redeclarations must match, hence the additions of
noexcept and extern "C".
The read function wasn't properly unpoisoning its result under msan,
causing test failures downstream when I tried to roll it out. This patch
adds the msan unpoison call that fixes the issue.
The inf and nan string index bounds checks were after the index was
being used. This patch moves the index usage to the end of the
condition.
Fixes#79988
I suspect this is a bug in linux 4.19, as the test passes as written on
my
linux 6.5 machine.
Let's revisit this after the build bots are upgraded.
Link: #80073
It appears that sys_epoll_pwait2 isn't always available, so we need to
add some sort of condition to enable it. This patch disables it until
that happens.
Summary:
The RPC interface uses several ports to provide parallel access. Right
now we begin the search at the beginning, which heavily contests the
early ports. Using the SMID allows us to stagger the starting index
based off of the cluster identifier that is executing the current warp.
Multiple warps can share an SM, but it will guaruntee that the
contention for the low indices is lower.
This also increases the maximum port size to around 4096, this is
because 512 isn't enough to cover the full hardare parallelism needed to
guarantee this doesdn't deadlock.
The epoll_wait functions are syscall wrappers that were requested by
upstream users. This patch adds them, as well as their header and types.
The tests are currently incomplete since they require epoll_create to
properly test epoll_wait. That will be added in a followup patch since
this one is already very large.
Summary:
This test was added to test the generated header. Unfortunately this
doesn't work if the header is never generated. Add a check to make sure
the user has included it in the list of headers.
Summary:
Recent patches have implemented builitin versions of these functions.
This patch simply removes uses of inline assembly to hopefully improve
optimizations in this area.
Summary:
The AMDGPU fixed frequency clock is fixed to a chip dependent frequency.
More modern chips have started to fix this at known values of 25 MHz or
100 MHz, so this function forwards those values. This was done using the
individual architectures. This patch simply uses the more concise
`__GFXn__` macro which indicates the major revision
Use definitions from `<linux/mman.h>` to dispatch arch-specific flag
values.
For example, `MCL_CURRENT/MCL_FUTURE/MCL_ONFAULT` are different on
different architectures.
PR 79573 introduced `ASSERT_ERRNO_*` macros for use in libc tests.
Introduce these macro definitions to FuchsiaTest.h for string tests to
compile on Fuchsia.
This patch provides specific test macros to deal with `errno`.
This will help abstract away the differences between unit test and integration/hermetic tests in #79319.
In one case we use `libc_errno` which is a struct, in the other case we deal directly with `errno`.
The epoll_wait functions are syscall wrappers that were requested by
upstream users. This patch adds them, as well as their header and types.
The tests are currently incomplete since they require epoll_create to
properly test epoll_wait. That will be added in a followup patch since
this one is already very large.
The Ryu algorithm is very fast with its table, but that table grows too
large for long doubles. This patch adds a method of calculating the
digits of long doubles using just wide integers and fast modulo
operations. This results in significant performance improvements vs the
previous int calc mode, while taking up a similar amound of peak memory.
It will be slow in some %e/%g cases, but reasonable fast for %f with no
loss of accuracy.
The standard requires `limits.h` constants to be used in preprocessors.
So we use `__SIZEOF_LONG__` instead of `sizeof(long)` to define
`LONG_WIDTH`. The macro `__SIZEOF_LONG__` seems to be available on both
clang and gcc since at least version 9.
```
AppProperties app;
```
is marked as a weak symbol in header now. One can just use `&app !=
nullptr` to check if `app` is defined. There is no need to define it for
overlay mode.
The faults on invalid vec range in mincore seems to be handled
differently by the OS (it is an erroneous edge case after all). Remove
the tests for now.
