Summary:
Allows us to set IPV6_PMTUDISC_PROBE
See http://man7.org/linux/man-pages/man7/ip.7.html for reference

Reviewed By: yfeldblum

Differential Revision: D17624135

fbshipit-source-id: 46c1e71c768a0a7d0fbab5b728ba5df1b2f781b3

Summary:
This diff avoids locking and traversing the domain's tagged list on shutdown of batches that never pushed objects to the list.

This change required batches to keep track of pushing objects to the domain's tagged list.
This in turn required reclamation of tagged objects to be invoked by the batch rather than using the free function hazptr_cleanup_batch_tag.
In order to avoid batches keeping track of the associated domain (and adding an extra field), batches are used only with the default domain.

Reviewed By: davidtgoldblatt

Differential Revision: D17416380

fbshipit-source-id: e5a3cd1492c1f1daf499b44fa1cfb4bb822062f7

Summary:
Reduce calls to string::operator+.
Constructing a single string by precalculating the size.

Reviewed By: yfeldblum

Differential Revision: D17573761

fbshipit-source-id: 3918d1774949873fab3ba702d47cdeb80b44ab1d

Summary: [Folly] No need to load test files at runtime in json test - just embed the content into the test source as usual.

Reviewed By: vitaut

Differential Revision: D17578929

fbshipit-source-id: 65b0bb7fe94f03b3defa9c539c2837c341e042c3

Reviewed By: yfeldblum

Differential Revision: D17556725

fbshipit-source-id: 693ab8a2288584d3a05298790b6289483814e895

Summary:
[Folly] Fix stack-use-after-scope in `folly::json::serialize` internals in `std::sort` comparison in `Printer::printObject`.

Also avoid an extra layer of indirection around the comparison function. Possibly useful because the function is called repeatedly within the loop.

Fixes #1190.

Reviewed By: vitaut

Differential Revision: D17560072

fbshipit-source-id: 787584dc1f7d70762a712869788f8d892dd19ed5

Summary:
There's already some ifdef for _WIN32 but it's not consistent.
Also nothing ever sets the define for the supported functions to 0,
so bail on those.

Reviewed By: yfeldblum

Differential Revision: D17559767

fbshipit-source-id: d0eebea980ef4f2b1288bdcc39547453efd3e9be

Summary: Add new helper method setCiphersuites to folly SSLOptions. Same behavior as the templated setCipherSuites that takes in a TSLOptions. Instead of getting the ciphersuites from the static TSLOptions::ciphers(), this method allows use caller to pass in the ciphersuite list.

Reviewed By: mingtaoy

Differential Revision: D17432484

fbshipit-source-id: 8a08b3651e209b5a4dfe4eca2352a9042206a48a

Summary:
It's possible, but not required, for platforms to support alignment
requirements greater than std::max_align_t. For example, on some 32-bit
platforms (e.g. iPhone armv7), std::max_align_t is only 4, but
std::atomic<unsigned long long> has an alignment requirement of 8. Check
for alignment at runtime instead of compile time to avoid spurious
static assertion failures.

Reviewed By: nbronson

Differential Revision: D17488704

fbshipit-source-id: 54cd7c2d7aec4f7f93e5fa6d62f8237f66a6c018

Summary:
this adds `oss-openr-linux-getdeps` to diffs affecting files under openr. With soma going away and the old fbcode_builder job disabled, this will give us the signal we need to keep the cmake build healthy.

[Some Info on Getdeps](https://our.intern.facebook.com/intern/wiki/Test_your_Open_Source_build_with_getdeps.py/)

Michael, this change may require you to bump up some of the dependent libraries and build them with cmake if not already. The main changes to the cmake script are around using package configs instead of `find_library`

Also, for those with more CMake experience: since there are some big changes in the `CmakeLists`, feel free to pour on more suggestions on how I could make it better and more aligned with other facebook OSS

Reviewed By: saifhhasan

Differential Revision: D16010068

fbshipit-source-id: 66f914f1971f826e0868c4130839380639a7e44b

Summary: [Folly] Add missing `template` qualification in `FunctionRef`. Comparable sites in `Function` include the `template` qualification.

Reviewed By: LeeHowes

Differential Revision: D17521726

fbshipit-source-id: 350fd0c2944508fb653239d637516d099184330d

Summary: Clarifying doc blocks.

Reviewed By: lbrandy

Differential Revision: D17527404

fbshipit-source-id: 4f5c83a94b511082379d8bbbfea6d37a908bc860

Summary:
The current version of libc++ deallocates the existing capacity
when calling operator=(initializer_list), even if the map is empty. This
diff relaxes the expectations of F14's allocated memory tests (which
fall back to the underlying STL std::unordered_map on some platforms)
to accept this implementation.

Reviewed By: shixiao

Differential Revision: D17527441

fbshipit-source-id: 01da55aaeb6f8328e093251b026052dac365f7b2

Summary: There is a build failure with some versions of MSVC. Backing out the change while investigating.

Reviewed By: lhuang04

Differential Revision: D17520392

fbshipit-source-id: ee63795ff78c5ac638fc97a9db632437436fb758

Summary:
[Folly] Optimize `Function::operator()` codegen for size and speed.

* Avoid translating between values and references for trivially-copyable values.
* Avoid shifting all arguments to make room for the function object address.

In the optimal case, the codegen for calling a `Function` with many arguments translates into just a `jmp`.

See:
* https://github.com/thecppzoo/zoo/commits/master/inc/zoo/AnyCallable.h
* https://github.com/bloomberg/bde/blob/3.38.0.1/groups/bsl/bslstl/bslstl_function.h
* https://github.com/bloomberg/bde/blob/3.38.0.1/groups/bsl/bslmf/bslmf_forwardingtype.h

Given this example code:

```lang=c++,name=check.cpp
extern "C" void check_0(folly::Function<void()>& f) { f(); }
extern "C" void check_1(int i, folly::Function<void(int)>& f) { f(i); }
extern "C" void check_2(int i, int j, folly::Function<void(int, int)>& f) { f(i, j); }
extern "C" void check_3(int i, int j, int k, folly::Function<void(int, int, int)>& f) { f(i, j, k); }
extern "C" void check_4(int i, int j, int k, int l, folly::Function<void(int, int, int, int)>& f) { f(i, j, k, l); }
```

Before:

```name=check.o
0000000000000000 <check_0>:
   0:   ff 67 30                jmp    QWORD PTR [rdi+0x30]
0000000000000000 <check_1>:
   0:   55                      push   rbp
   1:   48 89 f0                mov    rax,rsi
   4:   48 89 e5                mov    rbp,rsp
   7:   48 83 ec 10             sub    rsp,0x10
   b:   89 7d fc                mov    DWORD PTR [rbp-0x4],edi
   e:   48 8d 75 fc             lea    rsi,[rbp-0x4]
  12:   48 89 c7                mov    rdi,rax
  15:   ff 50 30                call   QWORD PTR [rax+0x30]
  18:   c9                      leave
  19:   c3                      ret
0000000000000000 <check_2>:
   0:   55                      push   rbp
   1:   48 89 d0                mov    rax,rdx
   4:   48 89 e5                mov    rbp,rsp
   7:   48 83 ec 10             sub    rsp,0x10
   b:   89 7d f8                mov    DWORD PTR [rbp-0x8],edi
   e:   89 75 fc                mov    DWORD PTR [rbp-0x4],esi
  11:   48 8d 55 fc             lea    rdx,[rbp-0x4]
  15:   48 8d 75 f8             lea    rsi,[rbp-0x8]
  19:   48 89 c7                mov    rdi,rax
  1c:   ff 50 30                call   QWORD PTR [rax+0x30]
  1f:   c9                      leave
  20:   c3                      ret
0000000000000000 <check_3>:
   0:   55                      push   rbp
   1:   48 89 c8                mov    rax,rcx
   4:   48 89 e5                mov    rbp,rsp
   7:   48 83 ec 10             sub    rsp,0x10
   b:   89 7d f4                mov    DWORD PTR [rbp-0xc],edi
   e:   89 75 f8                mov    DWORD PTR [rbp-0x8],esi
  11:   89 55 fc                mov    DWORD PTR [rbp-0x4],edx
  14:   48 8d 4d fc             lea    rcx,[rbp-0x4]
  18:   48 8d 55 f8             lea    rdx,[rbp-0x8]
  1c:   48 8d 75 f4             lea    rsi,[rbp-0xc]
  20:   48 89 c7                mov    rdi,rax
  23:   ff 50 30                call   QWORD PTR [rax+0x30]
  26:   c9                      leave
  27:   c3                      ret
0000000000000000 <check_4>:
   0:   55                      push   rbp
   1:   4c 89 c0                mov    rax,r8
   4:   48 89 e5                mov    rbp,rsp
   7:   48 83 ec 10             sub    rsp,0x10
   b:   89 7d f0                mov    DWORD PTR [rbp-0x10],edi
   e:   89 75 f4                mov    DWORD PTR [rbp-0xc],esi
  11:   89 55 f8                mov    DWORD PTR [rbp-0x8],edx
  14:   89 4d fc                mov    DWORD PTR [rbp-0x4],ecx
  17:   4c 8d 45 fc             lea    r8,[rbp-0x4]
  1b:   48 8d 4d f8             lea    rcx,[rbp-0x8]
  1f:   48 8d 55 f4             lea    rdx,[rbp-0xc]
  23:   48 8d 75 f0             lea    rsi,[rbp-0x10]
  27:   48 89 c7                mov    rdi,rax
  2a:   ff 50 30                call   QWORD PTR [rax+0x30]
  2d:   c9                      leave
  2e:   c3                      ret
```

After:

```name=check.o
0000000000000000 <check_0>:
   0:   ff 67 30                jmp    QWORD PTR [rdi+0x30]
0000000000000000 <check_1>:
   0:   ff 66 30                jmp    QWORD PTR [rsi+0x30]
0000000000000000 <check_2>:
   0:   ff 62 30                jmp    QWORD PTR [rdx+0x30]
0000000000000000 <check_3>:
   0:   ff 61 30                jmp    QWORD PTR [rcx+0x30]
0000000000000000 <check_4>:
   0:   41 ff 60 30             jmp    QWORD PTR [r8+0x30]
```

Reviewed By: mpark, ericniebler, ot, luciang

Differential Revision: D17416587

fbshipit-source-id: cdb76314197f8979339e31435fff997a46f48f1c

Summary:
This updates fbcode_builder to try and automatically detect the current
repository's project name by looking for a `.projectid` file in the repository
root.  If the project name can be detected:
- The current repository will automatically be used as the source directory
  for this project (instead of fetching the sources into the scratch
  directory).
- If an explicit project name was not specified on the command line, the
  current project will be built by default.

This also changes the repository detection logic to use the current working
directory, rather than the directory where the fbcode_builder code lives.
This will allow this logic to work even if we move fbcode_builder into its own
repository in the future, and have projects depend on it using git submodules.
This does mean that callers need to invoke fbcode_builder.py from inside the
repository.

Reviewed By: wez

Differential Revision: D17088938

fbshipit-source-id: f14d28fdcfaa330ff837ea52b8bdd4e358b81c61

Summary:
Update the generated `run_cmake.py` script to use `subprocess.run()` instead
of `os.execve()`.  The `os.execve()` call doesn't really do what we want on
Windows: this causes the script to exit while CMake is still running,
resulting in confusing output.  During the build step it also did not work
correctly with `vcvarsall.bat`, and using `subprocess` also solves this.

Reviewed By: wez

Differential Revision: D17493897

fbshipit-source-id: e0477627fc1824b0efcb1fa5a782d207853bcae8

Summary:
Never cache first-party projects that use ShipIt.  Previously the code checked
the `shipit_fbcode_builder` property, which controlled whether or not
the `fbcode_builder` sources should be included in the project's ShipIt
mapping.  This setting is enabled for most but not all projects that use
ShipIt.

This resulted in projects that use ShipIt but that do not include the fbcode
builder sources being incorrectly cached.  This caused getdeps.py to not
run the SimpleShipitTransformerFetcher properly when their sources changed.

Reviewed By: wez

Differential Revision: D17493522

fbshipit-source-id: 57be5ac94ae44f56ccb3ce60ba23fac5d68bce0f

Summary:
Update the getdeps manifest and Eden's CMake files to indicate that the
edenfsctl program depends on python-toml.

Reviewed By: chadaustin

Differential Revision: D17401215

fbshipit-source-id: f512678d8bca9c7b2b4d25bf9c3ecd7eed825de9

Reviewed By: simpkins

Differential Revision: D17403339

fbshipit-source-id: 2a6b2eb073d54e080f6a313948afd2815f58bba9

Summary: Fixes a warning about ambiguity between & and ==

Reviewed By: knekritz

Differential Revision: D17500996

fbshipit-source-id: 9a3d1da499bf25aff3d97bc3ea40bf5a1d19257d

Summary:
These two functions are currently not correctly implemented when compared to the documented behavior.

1. These functions aren't guaranteed to return correct information until you've called X509_check_purpose on the certificate. Before then, these flag fields are uninitialized.
2. X509_get_key_usage should return UINT32_MAX when the key usage flag isn't present.

This fixes both of these issues

Reviewed By: yfeldblum

Differential Revision: D15767405

fbshipit-source-id: 013bc4c2f694ba7cbd7395626418a0d423d6c1c7

Summary: As it says on tin.

Reviewed By: yfeldblum

Differential Revision: D15409159

fbshipit-source-id: a99b17b54e0c36d79956213655385d234190ff52

Summary:
Throws an exception when:

* The name specified in the manifest mismatches the filename
* Duplicated manifest -- with the sub-directory support it is now able to have multiple manifest files with the same name

Reviewed By: chadaustin

Differential Revision: D17438460

fbshipit-source-id: ac7ad0b701beb15f0e91bb05cd1ec8fe378ad5b6

Summary: Make getdeps to look for subdirectories for manifest files.

Reviewed By: simpkins

Differential Revision: D17222388

fbshipit-source-id: e13503beccd9edf6d80f78fbc3238b2a8d2053dd

Summary:
The libraries in thrift/lib/py support both Python 2 and Python 3, and rely on
the Python six module for some of this compatibility support.

Update the getdeps manifest for fbthrift to indicate this dependency, and
update fbthrift's CMakeLists.txt file to find and reference python-six
properly.  This will ensure that the python-six code is built into any python
executable that uses the thrift/lib/py libraries.

Reviewed By: yfeldblum

Differential Revision: D17401218

fbshipit-source-id: 0007dda8974ae9bd87e4d7e256c74908c9a30d8f

Summary:
Add a new builder that can extract Python wheel files, and re-package them
for consumption by our add_fb_python_library() and add_fb_python_executable()
CMake functions.  This is useful for dependencies on packages from PyPI.

At the moment this code only handles architecture-independent pure-Python
packages.  It shouldn't be too hard to extend this to handle more complex
wheels, but for now I only need to use it for some pure-Python wheels and so I
haven't tested with more complex wheel files.

This also includes two new manifests for python-six and python-toml that take
use this new builder.

Reviewed By: wez

Differential Revision: D17401216

fbshipit-source-id: d6f74565887c3f004e1c06503dc9ec81599dd697

Summary: Support `-Werror=unused-function`.

Reviewed By: Orvid, guangyfb

Differential Revision: D17252831

fbshipit-source-id: ccf3829ebaa6992341ff5b1ab84c173922eeae03

Summary:
Update the code to use `os.replace()` rather than `os.rename()` so that it
won't fail on Windows if the destination path already exists.

Reviewed By: chadaustin

Differential Revision: D17462716

fbshipit-source-id: cbc06319ccb2d73868f80ab1874890ebec5a621b

Summary:
Adds a microbenchmark for the lifetime of an unused tagged hazptr_obj_batch in the presence of unrelated objects in the domain's tagged list.

This diff also makes the calculation of the number of operations and the scalability measure for the cleanup microbenchmark more consistent with those for the other microbenchmarks.

Reviewed By: davidtgoldblatt

Differential Revision: D17416088

fbshipit-source-id: b59fd1b48114d591da5d9432df7910d940683006

Summary: This enable test targets to be built and ran

Reviewed By: lnicco

Differential Revision: D17408942

fbshipit-source-id: 144d223bc3830d07a0420e9569d3166a8646cd9a

Summary: changes the way it pulls its dependencies

Reviewed By: wez

Differential Revision: D17363235

fbshipit-source-id: 37e509c7e413f763e3553e9f01ac23951045089c

Summary: Dependencies include libbpf and libelf

Reviewed By: wez

Differential Revision: D17363237

fbshipit-source-id: 4408f2fbabbbde170b57779422038b32e52c6f51

Summary: This enables appending PKG_CONFIG_PATH to env variable

Reviewed By: wez

Differential Revision: D17363236

fbshipit-source-id: 18c6d7a97ba83edf085278bccaafa80821ea8860

Summary:
This commit configures CI for Windows, macOS and Linux using the
new GitHub Actions CI service.

The configuration was generated via:

```
build/fbcode_builder/getdeps.py generate-github-actions --output-file .github/workflows/main.yml folly
```
Pull Request resolved: https://github.com/facebook/folly/pull/1228

Reviewed By: yfeldblum

Differential Revision: D17454557

Pulled By: wez

fbshipit-source-id: a99261ee312d4093031cf6fad5832eacb1be1d97

Summary: [Folly] Cut no-op same-type casts in `Function` benchmark.

Reviewed By: LeeHowes

Differential Revision: D17432433

fbshipit-source-id: 6c2e53fc742aa590f7332efa146af41592274cc9

Summary: Original commit changeset: e28b4cb055b3

Reviewed By: yfeldblum

Differential Revision: D17429976

fbshipit-source-id: e2f6f59c22854f1b2fd25913ad779f4edc83f8ee

Summary:
create a unorderedReduceSemiFuture method that returns a SemiFuture
instead of just a Future.

Reviewed By: LeeHowes

Differential Revision: D16946582

fbshipit-source-id: e28b4cb055b3a9c67adebb373c60a775f7005762

Summary:
Update the thrift C++ and Python CMake rules to indicate that the output also
depends on the thrift compiler itself.

Previously the C++ rule indicated that the output depended on the thrift
template files, which caught most cases when the thrift compiler was updated,
but wasn't fully correct.  The thrift templates were also removed and baked
into the thrift compiler binary in D16356056.

Reviewed By: yfeldblum, chadaustin

Differential Revision: D17401217

fbshipit-source-id: ae5cde7a7e5e07a74406a1b6f4469124187bc12f

Summary:
This is useful when working on changes to some of the builder functions,
to skip ever trying to use cached results.

Reviewed By: chadaustin

Differential Revision: D17401219

fbshipit-source-id: fb7d5ea45618653957b9bd6a62eed91d8334824d