Summary: Add a specialization of `folly::hasher<std::string_view>` parallel to the specialilzation of `folly::hasher<std::string>`.

Reviewed By: luciang

Differential Revision: D28921343

fbshipit-source-id: 77213d9ff66cec57b6d36b214c41e479e1d9455d

Summary: We need a thread-safe alternative to `LOG_FIRST_N(severity, n)` -- specifically when n = 1, the most common case.

Reviewed By: yfeldblum, ot, luciang

Differential Revision: D28884240

fbshipit-source-id: 41c937bf37dba036b71f1c62fd70445e79a3924a

Summary: Since we're moving towards enabling TLS 1.3 by default in folly, add this version to the SSLVersion enum.

Reviewed By: yfeldblum

Differential Revision: D28908538

fbshipit-source-id: 19d9ee248fff4682eec59c6f3d699fc6c9fa1917

Summary: There are many possible knobs that may be tweaked but long chains of positional params are awkward. Extract a policy param to house many of these chained params. Facilitates adding more params in the future as well.

Reviewed By: ot, luciang

Differential Revision: D28824188

fbshipit-source-id: f56ec15242b148890eced06a3dd101d7cfaaefb1

Summary:
Now that `exception_wrapper` can access the exception object directly from the `std::exception_ptr`, it no longer needs to be passed the exception object separately.

This eliminates duplicative `catch (exception const&)` clauses which primarily construct `exception_wrapper` instances, reducing build artifact size.

Reviewed By: akrieger

Differential Revision: D27888763

fbshipit-source-id: 5f60a07083b3c8d818f0eafd5b17afcfca239ab8

Summary: The helper `catch_exception` may be used to wrap the `try {} catch (...) {}` syntax.

Reviewed By: Orvid, luciang

Differential Revision: D28276166

fbshipit-source-id: be903215251d8ea3321bd6d3b994b19359056f8c

Summary: Avoid questions of what may the mutex unlock method do to the passed state: nothing.

Reviewed By: aary

Differential Revision: D28895552

fbshipit-source-id: 8b73e76711bb553a344d958c80dcf14d56e74ffd

Summary:
Remove all the conditional compilations that were used for the googletest upgrade. We're set on Googletest 1.10.x now, so no need to keep the old code lying around.

TODO in the future, is to deprecate some of the other fb-only patches, and to switch over fbcode to use fbsource/third-party

Reviewed By: yfeldblum, igorsugak

Differential Revision: D28860854

fbshipit-source-id: 8ffbaf860fca8897f6691218bc0154723ec954d4

Summary: Under gcc8 in some usages, the compiler emits a stack copy of the proxy state but passes `7` instead of the address of the stack copy. Looks like incorrect codegen. Work around that bug by not having a stack copy.

Reviewed By: aary

Differential Revision: D28890467

fbshipit-source-id: 50b16464708c7ef3e360618f3d738264f59cf8a6

Summary: There is no longer compelling reason to keep this overload since it is relatively cheap to inspect any `exception_wrapper` or `exception_ptr`, no matter from which exception object type it is constructed.

Reviewed By: luciang

Differential Revision: D26877547

fbshipit-source-id: d9a38c9a56a47b9453eda2d9e8abf7586c8aab61

Summary:
Switch getReadBuffers to be IOBufVecQueue::IoVecVec based

(Note: this ignores all push blocking failures!)

Reviewed By: simpkins

Differential Revision: D28467957

fbshipit-source-id: 637bf07d516120cb2bab89c3cbc28f58b700748a

Summary: Universe upper bound is inclusive, so we need to make sure that we have a pointer for `upperBitsUniverse / skipQuantum`. The bug has currently no effect as we use a tighter upper bound by reading the end of the list on construction, but it is necessary to fix this if we want to avoid doing that.

Reviewed By: yfeldblum, philippv, luciang

Differential Revision: D28886633

fbshipit-source-id: ba53fcc3f2ae1d52fe8e39576ad930754282ddd9

Summary:
Add folly::IOBufIovecBuilder to be used with vector recv

(Note: this ignores all push blocking failures!)

Reviewed By: simpkins

Differential Revision: D28394781

fbshipit-source-id: 973eea6e4cbe15d68d1f123d5fed98b50f5d23cc

Reviewed By: ot, luciang

Differential Revision: D28250766

fbshipit-source-id: 288c8c61d23c001dcb0d461d3d5179e82c755aaf

Summary:
In C++20, `std::atomic` is no longer trivial. Change the static-assert that checks for its triviality to check instead for narrower properties.

Fixes: https://github.com/facebook/folly/issues/1594.

Reviewed By: ot, Mizuchi, luciang

Differential Revision: D28856931

fbshipit-source-id: e7ff4a1e80e59fdc78efb271f63c6325d5528416

Summary:
* Rename from `proxy()` to `state()` and from `proxy_type` to `state_type`.
* Require `state_type` to be semiregular and testable (convertible explicitly to `bool`). A default-constructed instance and an instance just after assignment from a default-constructed instance must test false.
* Add `std::adopt_lock` constructor which can accept a `state_type`.

Reviewed By: aary

Differential Revision: D28724949

fbshipit-source-id: 64fc29bd875dc24cc3fd62d1b4b86f7ebdacfb73

Summary: By implementing it in terms of a param-pack expansion of calls to `with_exception`. No longer rethrows objects not derived from `std::exception`.

Reviewed By: luciang

Differential Revision: D28125669

fbshipit-source-id: b9eef160cc03e2d6f5524c1a5113405cc2881324

Summary: Rather than implementing it via `handle`, which is complex. Works now that exact casting can always be done without `catch`.

Reviewed By: luciang

Differential Revision: D27987594

fbshipit-source-id: 9961b55089f58df1b06793390817e497c6da54ae

Summary:
This fixes  https://github.com/facebook/fbthrift/issues/429

Pull Request resolved: https://github.com/facebook/fbthrift/pull/430

Reviewed By: iahs

Differential Revision: D28832985

Pulled By: vitaut

fbshipit-source-id: 0719f27207d11bb7970cc43c621640c425d8f55d

Summary: Rather than implementing it via `with_exception`, which is implemented in terms of `handle`, which is complex. Works now that exact casting can always be done without `catch`.

Reviewed By: ot, luciang

Differential Revision: D27987235

fbshipit-source-id: 822b0fe168e3b55c506b88810e13573b87c381c7

Summary:
- Add DeadlockDetector interface to folly/concurrency
- Add IOThreadPoolDeadlockDetectorObserver class that can be registered in IOThreadPoolExecutor to enable the functionality for its threads that use EventBase.
- In ThriftServer use the new observer with IOThreadPoolExecutor
- Default implementation of deadlock detector is stubbed out and does not do anything

Reviewed By: mshneer

Differential Revision: D28582490

fbshipit-source-id: 1cf3c2957b46de83f07c53bab708fe09ebbe2b79

Summary: Rather than implementing it via `with_exception`, which is implemented in terms of `handle`, which is complex. Works now that exact casting can always be done without `catch`.

Reviewed By: ot, luciang

Differential Revision: D27987172

fbshipit-source-id: eca54e47b3a0fc5da4614bbd23b881b1e35eca4b

Summary: Pull Request resolved: https://github.com/facebookexternal/f4d/pull/1090

Reviewed By: laithsakka

Differential Revision: D28774321

Pulled By: kkeita

fbshipit-source-id: 2c8eb8edf69611e94bf124b52fc8c1e11df9b527

Summary:
Description:

Prior to this patch it was not possible to run open/r on linux running on ARM due to cmake and openssl being harded to download/compile for the x86_64 arch.

In order to prevent such problem this patch actively compiles cmake instead of using pre-compiled binaries and also allows the OpenSSLBuilder to provide the correct build args to openssl, thus not trying to compile or run x86_64 software.

Pull Request resolved: https://github.com/facebook/openr/pull/95

Test Plan: * built the project by using ./build/build_openr.sh

Reviewed By: wez

Differential Revision: D28224684

Pulled By: cooperlees

fbshipit-source-id: 9de61dc6d7dcf7116ec5c67f3f165cd4a4bb5e5c

Summary: There was a missing newline separator

Reviewed By: yfeldblum

Differential Revision: D28781619

fbshipit-source-id: d20b26d67e427cf8760d21118e53a44ec6109771

Summary: As titled

Reviewed By: rsunkad

Differential Revision: D28774938

fbshipit-source-id: 123fd2b170eec941533f7a7d3bdd40dd9c4e967f

Summary:
This is towards upgrading to newer OpenNSA 6.5.22.

This diff will be landed after we have verified that OpenNSA 6.5.21 has not
regressed from OpenNSA 6.5.19 (HW test results)

sha256sum on the tarball, and use that in the manifest.

Reviewed By: rsunkad

Differential Revision: D28774943

fbshipit-source-id: 7fe376cc4c351605ae76138f1ddd1fdc170d0fe2

Summary: New OpenNSA requires this.

Reviewed By: rsunkad

Differential Revision: D28774940

fbshipit-source-id: c030bbab28546373338608c9324229a07c4bd30c

Summary:
Currently the log is printed on every `accept()` failure, and those are likely to be correlated (most commonly, while the service is crashing), causing log spew at a time when high log signal-to-noise is crucial.

Throttle it and a couple of other related logs.

Reviewed By: yfeldblum

Differential Revision: D28777847

fbshipit-source-id: b4d1898b41f722362b7cdda53597bb37f5fdfa83

Reviewed By: mshneer

Differential Revision: D28768951

fbshipit-source-id: 66f43a5505b293ee087ace85c753f05e23b55892

Summary:
Change the constructors for hazptr_holder and add the function make_hazard_pointer to be consistent with [WG21 P1121](http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2021/p1121r3.pdf).

Change the constructors for hazptr_array and add the function make_hazard_pointer_array to be consistent with the changes to hazptr_holder.

Now the default constructors construct empty holders and arrays.
The free functions make_hazard_pointer and make_hazard_pointer_array are used to construct nonempty holders and arrays.

Fix a missing barrier bug in HazptrTest.cpp.

Reviewed By: yfeldblum

Differential Revision: D28731269

fbshipit-source-id: 4132b2d612dbe1e8867c07d619efaba40be83785

Summary: No such function exists.

Reviewed By: luciang

Differential Revision: D28432945

fbshipit-source-id: 9f17b1820a984a8ed8e6817793be5ec995e1caef

Summary:
This change introduces the function `errorCategoryForErrnoDomain` with the contract that it will return the "correct" domain object to use for errno-domain errors when constructing a `std::system_error` object. The current implementation simply forwards to `std::generic_category()` on Windows and `std::system_category()` elsewhere.

## Background
As we understand how the standard intended for this to work:

1. std::generic_category should be used for standard errno domain
2. std::system_category should be used for the system's error code domain

This creates an ambiguity on platforms which define their system error codes as extended errno values, because it's not obvious which category should be used. This applies to macos, Linux, etc.

Historically we decided to use std::system_category for all errno-domain exceptions because we actually can't tell if a given errno value is "standard" or not, and on most platforms there isn't any clear separation of domains.

However, on Windows it turns out this is well-defined, and our previous code is actively incorrect. This is because the system's error code domain is well-defined as "things that `GetLastError()` can return" and that domain is *not* an extension of `errno`. The values intersect with different meanings and in some circumstances the constructor of std::system_error will fail and crash the program if the category is std::system_category and the value comes from the errno-domain.

We chose not to use `std::generic_category()` on non-Windows platforms because the reasoning that led us to use `std::system_category()` historically still makes sense - that domain still contains non-standard-errno values on those platforms.

Reviewed By: simpkins

Differential Revision: D28327673

fbshipit-source-id: d1a3a55b384e818eb4122d5cd03031bc7de90876

Summary: To have a smaller conditional.

Reviewed By: aary

Differential Revision: D28723687

fbshipit-source-id: 6c6d9fe33c0eb8d00148cf6ab1bd9c1ce0dfae79

Summary: It is required to unlock a held lock, if it owns one.

Reviewed By: aary

Differential Revision: D28704148

fbshipit-source-id: c329a3045fa27985fdec4142f00fe11c95394779

Summary: Fixes: https://github.com/facebook/folly/issues/1586.

Reviewed By: luciang

Differential Revision: D28694175

fbshipit-source-id: 56d57e99d5cee61004a499d8cf16da9a03acbcec

Summary:
Add IOBuf SizedFree API

(Note: this ignores all push blocking failures!)

Reviewed By: simpkins

Differential Revision: D28667639

fbshipit-source-id: 6264d829948110077bad9dead8dad785795c211b

Summary:
Pull Request resolved: https://github.com/facebook/folly/pull/1590

MSVC warning C4127 (conditional expression is constant) goes a bridge to far but we work around it.

* It warns against perfectly-correct C++14 code which makes it harder to write normal C++ which works with both C++14 and C++17.
* `if constexpr` asks the compiler to do different things from `if`. It is not a drop-in replacement when the conditional expression is constant.

Fixes: https://github.com/facebook/folly/pull/1588.

Reviewed By: akrieger

Differential Revision: D28692386

fbshipit-source-id: 2d47a7b283f6b7a32dae3deb497a9f2dd51fd36b

Summary:
Change the hazptr_hoklder function names get_protected and reset to (the names in [WG21 P1121](http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2021/p1121r3.pdf)) protect and reset_protection, respectively.

The primary change is in folly/synchronization/HazptrHolder.h

Reviewed By: yfeldblum

Differential Revision: D28662903

fbshipit-source-id: d074c718514716229daaf8dae14b5c275942b38a

Summary:
The guard targets its former use in `__thread` variables, which must be trivial. But it is now used in `thread_local` variables, which can have default constructors.

The relevant switch from `__thread` to `thread_local` was in {D27559375 (https://github.com/facebook/folly/commit/eeec4600b857dd70ca6b30837d14bb79cf9a2ef7)}.

Reviewed By: luciang

Differential Revision: D28683625

fbshipit-source-id: af74801a13e479a262ea50e6d3f89053e67d7ac9