Having a single initializer function lets us not set a randomized seed in deterministic mode, slightly simplifying the stdlib.
Set related stdlib properties to be always inlined.
- Hash seed randomization can now be disabled by defining the SWIFT_DETERMINISTIC_HASHING environment value with a value of "1".
- The random hash seed is now generated using arc4random, where available. On platforms where it isn't, don't construct std::random_device twice.
- _Hasher._secretKey is renamed _Hashing._seed, with no setter.
- _Hasher._isDeterministic is a new property exposing whether we're running with non-random hashes. (Set/Dictionary will need this information to decide if they're allowed to use per-instance seeding.)
I had optimistically written the code here optimistically hoping #7837 would land in time for me to merge, but that didn't happen, so adjust some things to match the current 12-byte object header size on 32-bit, and introduce some ABI constants for the expected 32- and 64-bit object header sizes we can assert against so that we have some robustness when it eventually changes again. Implements rdar://problem/31768303.
Provides a new fallback for Process arguments for those instances where we do
not own main (e.g. Frameworks, Objective-C owns main.m or main.c, etc.). This
includes a number of platform-specific specializations of argument grabbing
logic and a new thread-safe interface to Process.unsafeArgv.
main() | _NSGetArgc/_NSGetArgv | /proc/self/cmdline | __argc/__argv
--------|--------------------------|------------------------|---------------
Scripts | OS X, iOS, tvOS, watchOS | Linux, FreeBSD, Cygwin | Windows
For interpreted Swift where we must filter out the arguments we now do so by
loading the standard library and calling into new SPI to override the arguments
that would have been grabbed by the runtime. This implementation completely
subsumes the use of the entry point '_stdlib_didEnterMain' and it will be
removed in a future commit.
The standard library has grown significantly, and we need a new
directory structure that clearly reflects the role of the APIs, and
allows future growth.
See stdlib/{public,internal,private}/README.txt for more information.
Swift SVN r25876
