Summary: [Folly] Better constrain `EvictingCacheMap` iterator conversions.

Reviewed By: shixiao

Differential Revision: D14162009

fbshipit-source-id: 8a3011450620fcf1ee6a137834ebbd1e5953e0ed

Summary:
We observed some RSS regression for certain use cases - setting decay time to 0 should fix this as freed regions will be released back to the kernel immediately instead of delayed.

The risk is that we lose regions before we can reallocate them and thus over time end up with holes in the huge page region.
If we see this becoming an issue for some use cases, we can add a parameter to control the decay time.

Releasing immediately should be OK for huge pages in most cases. For cases with frequent allocation and deallocation of large areas there can be a perf impact however.

Reviewed By: interwq

Differential Revision: D13853171

fbshipit-source-id: 83fb95ed9c9bcb6ebdd1f80d78347e5eec61c084

Summary:
- When Folly supported autotools builds, a different include for
  `dwarf.h` was required in `folly/experimental/symbolizer/Dwarf.cpp`.
- Since Folly does not support autotools  builds as of `1d58fd57`, cut
  this include and just assume `<dwarf.h>` works.
Pull Request resolved: https://github.com/facebook/folly/pull/1023

Reviewed By: simpkins

Differential Revision: D14119901

Pulled By: yfeldblum

fbshipit-source-id: f676f72ec91e25390cb3bbbe544de7cbc68e1d73

Summary: [Folly] `type_info_of`, which returns `typeid` when RTTI is available, otherwise `nullptr`.

Reviewed By: swolchok

Differential Revision: D14159675

fbshipit-source-id: b64ab770f12c7385bb286f658627d085e561def6

Summary: [Folly] Simplify `is_negative`.

Reviewed By: stevegury

Differential Revision: D14141289

fbshipit-source-id: 88bfd5923d90c5ac23d431110c0f2dc6c476d868

Summary: demangle.h isn't available on macOS, so only include it on Linux.

Reviewed By: andrewjcg

Differential Revision: D14114593

fbshipit-source-id: 59b12bfb4a52ada636b3648115dec1383f58c22f

Summary:
[Folly] Avoid unary negation of unsigned in `FormatValue`, which some compilers may warn against.

```
folly\format-inl.h(452): error C4146: unary minus operator applied to unsigned type, result still unsigned
```

Reviewed By: Orvid

Differential Revision: D14141989

fbshipit-source-id: 3bff06fe09fd4ec22d93b72a74f086ad9c576692

Summary: [Folly] Remove a legacy guard around an `exceptionStr` overload protecting against platforms lacking `std::exception_ptr`.

Reviewed By: mzlee

Differential Revision: D14129260

fbshipit-source-id: 2947c5b00d901ccaf58aefeef51e442121777eba

Summary:
[Folly] Use `bit_cast` in `Endian`.

Requires moving `bit_cast` to the top of the header.

Reviewed By: aary

Differential Revision: D14080604

fbshipit-source-id: cae28003895f1326138459c3a951d38e27e27506

Summary: [Folly] Cut unnecessary `assume_unreachable` in `exceptionStr`.

Reviewed By: meyering

Differential Revision: D14129281

fbshipit-source-id: a7ae13188bb19d829a6c977243719285186dbfec

Summary: Removes references to custom patches to OpenSSL 1.0.2 for async from AsyncSSLSocket.

Reviewed By: anirudhvr

Differential Revision: D13908917

fbshipit-source-id: a01c1a8a7523dd7b4b95a7f701cc6b356c645332

Summary:
- Backporting `std::index_sequence`, `std::integer_sequence`, and other
  associated template aliases such as `index_sequence_for` and
  `make_index_sequence` is not needed as Folly requires C++14. These
  functions and template aliases are available in C++14 standard libraries,
  including GCC 4.9.
Pull Request resolved: https://github.com/facebook/folly/pull/1022

Reviewed By: Orvid

Differential Revision: D14119891

Pulled By: yfeldblum

fbshipit-source-id: 5ba55cc91495cf488cebfa1ebe82c0ff919e9840

Summary: getKeepAlive can get a KeepAlive object and return a copy of itself

Reviewed By: yfeldblum

Differential Revision: D14095402

fbshipit-source-id: 9d00ebecddc938e8cf02bcb7cee0642a666db349

Summary:
I'm not entirely sure the original motivation for this, but for the current
executable, we've been normalizing addresses from the virtual address referenced
by the first "LOAD" program header instead of 0.  This appears to be a bug, as
it forms invalid addresses into the ELF file.

In the case of the signal handler test, this happens to work with gold, as the
initial section lookup just happens to hit in the `.debug_str` section (as opposed
to the expected `.text` section), and the following name translation then undoes
the base address normalization to get a correct lookup.

While this works for gold, it breaks for LLD and meant we had to opt-out folly
out (D13279459).

Reviewed By: yfeldblum

Differential Revision: D14119804

fbshipit-source-id: 53dcaeb72ed75e58f9a46b15799ce1af5ff80531

Summary:
OpenSSL 1.1.1 adds TLSv1.3 support, but changes several semantics (e.g.
assumptions on SSL_get_session() returning resumable sessions) that require
some work to address. A lot of our AsyncSocket tests fail (e.g. tests for
resumption will automatically fail, since TLSv1.3 has no resumption support),
and would need to be updated to explicitly disable TLSv1.3.

The plan is to eventually remove this after these items are addressed.

Reviewed By: yfeldblum

Differential Revision: D14073093

fbshipit-source-id: 181b05395ed35aaa7deb00b8968ff4d371b683f4

Summary:
- Backporting `std:exchange` is no longer needed as Folly requires C++14
  support and C++14-compliant vendors have `std::exchange` in their
  standard library, notably including GCC 4.9.
- Cut backport of `std::exchange` and fix call sites to explicitly use
  `std::exchange` where they were previously relying on `exchange` being
  found in the `folly` namespace.
Pull Request resolved: https://github.com/facebook/folly/pull/1021

Reviewed By: Orvid

Differential Revision: D14119875

Pulled By: yfeldblum

fbshipit-source-id: 686a8e812f6728281b432eae1586de28d21da9dd

Summary:
A specialization for reading into enums from serialized form was added a while back. Unfortunately, no corresponding change to serialize from enums into a dynamic was added.

This change adds the corresponding DynamicConstructor specialization for enums to allow serializing enums and objects containing enums.

Reviewed By: ot, shixiao

Differential Revision: D14091417

fbshipit-source-id: 15ef8bc46843cd668b4b2c991e84167dabaf69fa

Summary: [Folly] `kHasRtti` to parallel `FOLLY_HAS_RTTI`.

Reviewed By: Orvid

Differential Revision: D14129217

fbshipit-source-id: ce60fd0b47c64c19b515d21db55aa88ba37ca637

Summary:
The current predicate yields false positive for NDK r17. NDK r18 has launder without defining `__cpp_lib_launder`. NDK r19 finally gets it right by defining `__cpp_lib_launder`.

r17: launder? no,  `__cpp_lib_launder` undefined, `_LIBCPP_VERSION == 6000`
r18: launder? yes, `__cpp_lib_launder` undefined, `_LIBCPP_VERSION == 7000`
r19: launder? yes, `__cpp_lib_launder == 201606L`, `_LIBCPP_VERSION == 8000`

Reviewed By: yfeldblum

Differential Revision: D14098189

fbshipit-source-id: 315dba44c6474407a8f4c1d25c81fff057d5f7db

Summary:
[Folly] Use `StaticSingletonManager` for `LoggerDB::get()` inline fast path.

This also simplifies the singleton setup overall.

Note that the inline slow path here is not quite as small as doing the strategy directly would be since three pointers need to be passed to the outline slow path.

Reviewed By: simpkins

Differential Revision: D14016983

fbshipit-source-id: ea2646f8efd5c2dbcdece4ebd3b88949bc3d4294

Reviewed By: yfeldblum

Differential Revision: D14109224

fbshipit-source-id: 4bcd40b8692478540f5b5b4ee2751f1d311b3ac5

Summary:
- AtomicHashMap.h has an unneeded include for
  `<boost/type_traits/is_convertible.h`.
- Remove the include and add `<type_traits>` in `AtomicHashMap-inl.h`
  since it uses `std::is_convertible`.
Pull Request resolved: https://github.com/facebook/folly/pull/1018

Reviewed By: Orvid

Differential Revision: D14078944

Pulled By: yfeldblum

fbshipit-source-id: f1450166a5bedb279db71e9b4f915811c71e5f1a

Reviewed By: yfeldblum

Differential Revision: D13603520

fbshipit-source-id: 08365b3723c024697a546223683e774f18b61a94

Summary:
Use C++11’s override and remove virtual where applicable.
Change are automatically generated.

Reviewed By: shixiao

Differential Revision: D14089910

fbshipit-source-id: 12c776ea06094ee77c7e07263397dab3419c5309

Summary:
On ARM gcc, the unwind header defines exception_class as a char[8] rather
than a uint64_t.  Consequently compilation of exception_tracer fails on ARM
with the following error:

    .../folly/experimental/exception_tracer/ExceptionTracer.cpp: In function 'bool folly::exception_tracer::{anonymous}::isAbiCppException(const __cxxabiv1::__cxa_exception*)':
    .../folly/experimental/exception_tracer/ExceptionTracer.cpp:107:45: error: invalid operands of types 'const char [8]' and 'unsigned int' to binary 'operator&'
        return (exc->unwindHeader.exception_class & 0xffffffff) == cppClass;
                ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~^~~~~~~~~~~~

Construct a uint64_t for this platform.

Reviewed By: yfeldblum

Differential Revision: D13763587

fbshipit-source-id: 011cf13cdfcd1fffdeab8c384f7274f20faecbe5

Summary: Wrap Executor in ExecutorWithPriority if custom priority is passed.

Reviewed By: yfeldblum

Differential Revision: D14079222

fbshipit-source-id: 56917827f54115b90ca237c71321f7db327355e1

Reviewed By: yfeldblum

Differential Revision: D14062156

fbshipit-source-id: 2cdc32fc9834bd165fa8011ca1d336edaf05f653

Summary:
delayedUnsafe was deprecated.

All callers have been removed. This removes the core code so that it will not sneak back in.

Reviewed By: yfeldblum

Differential Revision: D14029673

fbshipit-source-id: 0384364a8e0ab8953e9746b91e3b6e7b2e5d7c67

Summary: [Folly] A test verifying `Function` behaves as expected with max-align callables.

Reviewed By: aary

Differential Revision: D14077496

fbshipit-source-id: 8a9efaee3cc4c5d69c6a94eb5ad1928d241eb4e0

Summary: Clone sleep as sleepUnsafe as a codemod target to migrate callsites to a SemiFuture-returning sleep.

Reviewed By: yfeldblum

Differential Revision: D14072020

fbshipit-source-id: 3dc88378732ca203c168ea2e4371508ee376cc43

Summary: SemiFuture implementation assumes that it's always safe to read Executor (if Executor is DeferredExecutor - then SemiFuture can never be completed until via is called, otherwise Executor is nullptr and we should never overwrite it). doCallback() however was unconditionally overwritting Executor, which resulted in TSAN reports.

Reviewed By: yfeldblum

Differential Revision: D14063047

fbshipit-source-id: 7553c8a2d0cbda05ad07b87297a334a69ee77f9c

Summary:
range.pxd needs to be exported; so that fbtrhift-py3 can compile against it
Pull Request resolved: https://github.com/facebook/folly/pull/1013

Reviewed By: yfeldblum

Differential Revision: D13987018

Pulled By: calebmarchent

fbshipit-source-id: 7b7e6f62e5bc23e70a3c263fb3b33cf1d439e439

Summary: [Folly] Remove disabled code from `FOR_EACH_RANGE`.

Reviewed By: aary

Differential Revision: D14062987

fbshipit-source-id: 6d01e76debc46398ceae3be435691c20595d393e

Summary:
[Folly] `pretty_name`, for getting static type pretty-names without RTTI.

Available as constant expressions - no runtime overhead.

Depends on per-platform non-specified magic symbols. May not work everywhere.

Reviewed By: aary

Differential Revision: D14019723

fbshipit-source-id: e50557261024298cd37957b94dad3a10c927ee97

Summary: [Folly] Cut macro `FOR_EACH_RANGE_R`.

Reviewed By: aary, danobi

Differential Revision: D14058731

fbshipit-source-id: d31c0673785d467665598e2138b6b6082d9629ab

Summary:
- Use `std::is_trivially_destructible` instead of
  `boost::has_trivial_destructor` in a few places.
Pull Request resolved: https://github.com/facebook/folly/pull/1003

Reviewed By: lbrandy

Differential Revision: D13754694

Pulled By: yfeldblum

fbshipit-source-id: b32dbc901fd7c9cae681ac3436cc71ff075f30ec

Summary: The file descriptor overload will be going away.

Reviewed By: yfeldblum

Differential Revision: D13628834

fbshipit-source-id: bc81ffdf011113479c95c1e8ae7deb4d0ff91e41

Summary: [Folly] `StaticSingletonManager` without RTTI as a variant, but without support for dynamic loading either.

Reviewed By: andriigrynenko

Differential Revision: D14018865

fbshipit-source-id: d4eadc8924e6fec2cbb1dae957e311d80e9ce289

Summary: [Folly] Fix StaticSingletonManager inline fast path under gcc - code size for default-initialized `static std::atomic<...>` local is large, but when value-initialized is trivial.

Reviewed By: andriigrynenko

Differential Revision: D14018861

fbshipit-source-id: e767ea3e46c3e3317f7b60008bc77f64edb2dea0

Summary: Pull Request resolved: https://github.com/facebook/folly/pull/1014

Reviewed By: lbrandy

Differential Revision: D14019229

Pulled By: yfeldblum

fbshipit-source-id: dd07d567a7f176a3bb0e18f7a19c3babfe2d431d