To work-around #80059, we need to stop return address signing and
opt-out of BTCFI enforcement via enabling a platform linker option.
We don't want to completely undo the BTCFI work in the rare case that
we later figure out how to properly address the above issue, or allow
users who might want to benefit from BTCFI enforcement and won't use
Concurrency. To do this, condition the existing BTCFI flag enforcement
into a configuration option that defaults to off for now.
Because the new swift-driver needs to "know" whether the frontend is
configured to opt-out or not, and since the new driver communicates with
the frontend via the target info JSON to begin with, we add a field
that emits the build flavor to signal the right behavior.
This change introduces a new compilation target platform to the Swift compiler - visionOS.
- Changes to the compiler build infrastrucuture to support building compiler-adjacent artifacts and test suites for the new target.
- Addition of the new platform kind definition.
- Support for the new platform in language constructs such as compile-time availability annotations or runtime OS version queries.
- Utilities to read out Darwin platform SDK info containing platform mapping data.
- Utilities to support re-mapping availability annotations from iOS to visionOS (e.g. 'updateIntroducedPlatformForFallback', 'updateDeprecatedPlatformForFallback', 'updateObsoletedPlatformForFallback').
- Additional tests exercising platform-specific availability handling and availability re-mapping fallback code-path.
- Changes to existing test suite to accomodate the new platform.
Reformatting everything now that we have `llvm` namespaces. I've
separated this from the main commit to help manage merge-conflicts and
for making it a bit easier to read the mega-patch.
This is phase-1 of switching from llvm::Optional to std::optional in the
next rebranch. llvm::Optional was removed from upstream LLVM, so we need
to migrate off rather soon. On Darwin, std::optional, and llvm::Optional
have the same layout, so we don't need to be as concerned about ABI
beyond the name mangling. `llvm::Optional` is only returned from one
function in
```
getStandardTypeSubst(StringRef TypeName,
bool allowConcurrencyManglings);
```
It's the return value, so it should not impact the mangling of the
function, and the layout is the same as `std::optional`, so it should be
mostly okay. This function doesn't appear to have users, and the ABI was
already broken 2 years ago for concurrency and no one seemed to notice
so this should be "okay".
I'm doing the migration incrementally so that folks working on main can
cherry-pick back to the release/5.9 branch. Once 5.9 is done and locked
away, then we can go through and finish the replacement. Since `None`
and `Optional` show up in contexts where they are not `llvm::None` and
`llvm::Optional`, I'm preparing the work now by going through and
removing the namespace unwrapping and making the `llvm` namespace
explicit. This should make it fairly mechanical to go through and
replace llvm::Optional with std::optional, and llvm::None with
std::nullopt. It's also a change that can be brought onto the
release/5.9 with minimal impact. This should be an NFC change.
Make sure that we add the appropriate rpaths so that the appropriate
_Concurrency back-deployment library can be picked up.
We don't need to update the Swift driver since it uses the C++ driver
as the source of truth to determine if the relevant rpath should be
added or not.
Prebuilt-module directory now contains a SystemVersion.plist file copied from the SDK
it's built from. This patch teaches the compiler to remark this version and the SDK version
when -Rmodule-interface-rebuild is specified. The difference between these versions could
help us debug unusable prebuilt modules.
Some code paths that see target triples go through the frontend
without seeing the driver. Therefore, perform the same "simulator"
inference for x86 iOS/tvOS/watchOS triples also in the frontend,
to ensure that we remain compatible. Also make sure that
-print-target-info performs the appropriate adjustment.
Some code paths that see target triples go through the frontend
without seeing the driver. Therefore, perform the same "simulator"
inference for x86 iOS/tvOS/watchOS triples also in the frontend,
to ensure that we remain compatible. Also make sure that
-print-target-info performs the appropriate adjustment.
Add support in the driver and frontend for macCatalyst target
targets and library search paths.
The compiler now adds two library search paths for overlays when compiling
for macCatalyst: one for macCatalyst libraries and one for zippered macOS
libraries. The macCatalyst path must take priority over the normal macOS path
so that in the case of 'unzippered twins' the macCatalyst library is
found instead of the macOS library.
To support 'zippered' builds, also add support for a new -target-variant
flag. For zippered libraries, the driver invocation takes both a -target and a
-target-variant flag passes them along to the frontend. We support builds both
when the target is a macOS triple and the target variant is macCatalyst and
also the 'reverse zippered' configuration where the target is macCatalyst and the
target-variant is macOS.
The backwards-deployment install name trickery we're using doesn't
handle "patch" components in version numbers, so we still need to
provide an rpath even when deploying to macOS 10.14.4.
Many build systems that support Swift don't use swiftc to drive the linker. To make things
easier for these build systems, also use autolinking to pull in the needed compatibility
libraries. This is less ideal than letting the driver add it at link time, since individual
compile jobs don't know whether they're building an executable or not. Introduce a
`-disable-autolink-runtime-compatibility` flag, which build systems that do drive the linker
with swiftc can pass to avoid autolinking.
rdar://problem/50057445
When loading a module supporting multiple targets, the module loader now looks for a file named with a normalized version of the target triple first, and only falls back to the architecture name if the normalized triple is not found.
On the Raspberry Pi 2 when trying to import Glibc, without this patch, it will attempt to
find the module map at "/usr/lib/swift/linux/armv7l/glibc.modulemap" and
fail to do so.
With this patch it will attempt to find the module map at
"/usr/lib/swift/linux/armv7/glibc.modulemap" where it will succeed in
finding the module map.
Similar behavior currently happens in the Driver and Frontend. To DRY up
this behavior it has been extracted to the Swift platform.
- Added missing ifdef guard in PointerIntEnum header
- Consistent naming convention for ifdef guards
- Consistent 'end namespace swift'
- Consistent single EOL at end of header files
Introduce DarwinPlatformKind, which would allow us to switch on darwin
platforms instead of copying and pasting the brittle logic in several places.
Use the helper method to simplify ClangImporter.
This way they can be used from other projects, like LLDB. The downside
is we now have to make sure the header is included consistently in all
the places we care about, but I think in practice that won't be a problem,
especially not with tests.
rdar://problem/22240127
Swift SVN r31173
We already do for the iOS simulator and the tvOS simulator. This fixes
the 'unrecognized selector sent to instance’ bridging crashes in the stdlib
watch simulator tests.
Greg Parker did the hard work of tracking this down and suggested the fix.
<rdar://problem/20932146>
Swift SVN r28846
- Add frontend and standard library build support for tvOS.
- Add frontend support for watchOS.
watchOS standard library builds are still disabled during SDK bring-up.
To build for TVOS, specify --tvos to build-script.
To build for watchOS, specify --watchos to build-script (not yet supported).
This patch does not include turning on full tests for TVOS or watchOS, and
will be included in a follow-up patch.
Swift SVN r26278
