Add compile-checks to ensure the parameter to absl::numbers_internal::FastIntToBuffer isn't provably insufficient

This performance-sensitive API is internal, and should not be used directly. Nevertheless, some do use it, so it's worth trying to block incorrect uses where we can.

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Change-Id: Ib5df39b450ef2ceda795082cde10ec2ba2642172

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Change-Id: Ide100c69b10e28011af17c7f82bb10eea072cad4

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Change-Id: Iacef0e069c012a04960211c032454244822f9634

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Change-Id: Iddd2f484807cb02dd2ee8bba26c22d196be02c88

Linux kernel's rt_sigprocmask correctly handles an unaligned user address[1].
The original issue was for qemu-user, which seems long irrelevant.

Tested locally on an AArch64 CPU and qemu-aarch64-static.

The alignment operation actually serves another purpose: when addr resides in
the last 7 bytes of a page (unaligned), check only the current page and not the
next. Update the comment.

[1]:
kernel/signal.c `SYSCALL_DEFINE4(rt_sigprocmask`
arch/arm64/include/asm/uaccess.h:raw_copy_from_user
arch/arm64/lib/copy_template.S  "alignment handled by the hardware"

PiperOrigin-RevId: 592618320
Change-Id: Ifbd05aba42f46e36e710cca940570213036b3ce0

We currently have a workaround for MSVC, which has constexpr pointer arithmetic bugs. The bug seems to still exist and the existing code for non-MSVC compilers doesn't build.

This alternative constexpr constructor avoids pointer arithmetic and seems to be working for all, including MSVC.

PiperOrigin-RevId: 592586957
Change-Id: Ic585693c3a7abaab5fbbc0954b8ee924994f8dbf

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Change-Id: I55fa9982c4dbc723b30957cb31da95251e368707

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Change-Id: I373943b8daf28781e063b302fc916ca5644e8fe1

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Change-Id: I97e4df805c7313896228430a50a7f991127f3e30

PiperOrigin-RevId: 592272653
Change-Id: I895c5786555227bdc88ab0a4cce8cf5ba65222a1

use Bazel 7.0.0.

CMake is also updated to 3.28.1

PiperOrigin-RevId: 592263272
Change-Id: I4daccdad4bceb483b0400328baebc79591990328

The added test exposes a false TSan race report in
EnableInvariantDebugging/EnableDebugLog related to SynchEvent reuse.

We ignore most of the stuff that happens inside of the Mutex code,
but not for the code inside of EnableInvariantDebugging/EnableDebugLog.
So these can cause occasional false reports on SynchEvent bankruptcy.

Also ignore accesses in EnableInvariantDebugging/EnableDebugLog.

PiperOrigin-RevId: 592226791
Change-Id: I066edb1ef5661ba6cf86a195f91a9d5328b93d10

PiperOrigin-RevId: 591987002
Change-Id: Ic1ed2063aeb95a6e814eefcbed024e1a5a1d8d2f

Previously, `absl::Condition` incorrectly used the same (non-`const`)
pointer-to-method type when wrapping both `const` and non-`const` methods.

Unfortunately, this is undefined behavior according to `[expr.reinterpret.cast]`
in the C++ standard:

> The effect of calling a function through a pointer to a function type that is
> not the same as the type used in the definition of the function is undefined.

This fixes the UB.

PiperOrigin-RevId: 591981682
Change-Id: Iaca955346699417232383d3a1800ea9b82ea5761

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Change-Id: I55de0886d3ce2d58cc1c94a15ce0f3eefc5eeaaf

PiperOrigin-RevId: 591894838
Change-Id: Ib3fe72d255f49320e2728c210ba1faabc81e0ef8

These are in some sense correct (begin()/end() can be null for empty spans), but
don't capture the critical contract that begin() is only null when end() is.
This leads to foreach loops over spans being considered unsafe.

Long-term we may want to express such constraints somehow, but for now giving
these pointers unknown nullability is the best we can do.

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Change-Id: I1f02e068a445c0ca5996a9212477b64393ef4161

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Change-Id: Iae2477a24819e20288fbb83b4a343031af71f1bb

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Change-Id: I3e654433f0b0a4ea02ee10e0894e70738e730782

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Change-Id: Ibc703b0fbedede86ddaa9682049b7dcc2250fbfb

These methods will only be defined if they're defined for `T`.  Additionally,
we add jitter to the output to discourage people relying on the output format.

PiperOrigin-RevId: 590598988
Change-Id: I4e7173b5f0c66fd3a1cdd3392944e20b8a26641f

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Change-Id: Ib98bbb5a5dadbce5e891567038e016f4da2efc0b

It is not used at the moment. Usage is planned to be submitted separately.

Useful for faster iterating over all slots in the internal functions.

PiperOrigin-RevId: 590300049
Change-Id: I081f33113268761db868771d29796d94c24e4e7a

These used to be independent implementations. Now that they are aliases, maintaining tests doesn't make sense anymore.

PiperOrigin-RevId: 589947915
Change-Id: I555496e3467d56a75468b180383482eee2e8f198

Abseil does not support C++11 anymore: https://github.com/google/oss-policies-info/blob/b842c39db88e6569dfe2cf98be434b03507cb503/foundational-cxx-support-matrix.md

NOTE: This is a breaking change because `std::integer_sequence<T>` requires `std::is_integral_v<T>`, but `absl::integer_sequence<T>` does not.

Unit tests will be deleted in a follow-up.

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Change-Id: I57a81e4451840304d5fba60bef286e81e024af9c

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Change-Id: I9657761d1f71c665582406f278c6605f6d382f6d

PiperOrigin-RevId: 588893303
Change-Id: I3f9278f2f7f0bc4b8903a87cb4a740daf7349755

Details:
- In case the table entirely fits into a single group size (`capacity <= Group::kWidth`), the order of elements is not important.
- For growing upto Group::kWidth we rotate control bytes and slots deterministically (using memcpy).
- We also avoid second find_first_non_full right after resize for small growing.
PiperOrigin-RevId: 588825966
Change-Id: I09bd7fd489e3868dcf56c36b436805d08dae7ab5

Reduces final binary size by avoiding stream I/O and all its associated
overhead.

PiperOrigin-RevId: 588789394
Change-Id: Ib8653db77aee0dae45e44f4ac72fe7dd87aa2eba

PiperOrigin-RevId: 588530709
Change-Id: Iee28c7693a4802f11e13728e1c28febee8c8576f

This works around a Clang bug, https://github.com/llvm/llvm-project/issues/25168

PiperOrigin-RevId: 588491254
Change-Id: Ia59afae4df45474d6025a2ab1ca487b381c9ee66

Chromium requires no global destructors.

PiperOrigin-RevId: 588466793
Change-Id: Icd255d9fb37667b4f5ce4b2552b70fa53cbf6ecf

absl_log.h is supposed to be a mirror of log.h that only uses ABSL_
prefixed macros. This change adds ABSL_VLOG_IS_ON to absl_vlog_is_on.h
and uses it in the implementation of VLOG. VLOG_IS_ON is then only
exported though vlog_is_on.h.

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Change-Id: Ifa9193afa0b782194b64447f4fedfaf24b72c95a

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Change-Id: I6a3af3c044b887ec65b19390d316cfb3ccdcc853