Indexing a module from the swiftinterface puts the swiftinterface
version in the cache. Subsequent builds don't see the adjacent
swiftmodule file. This can break test clients that need the adjacent
swiftmodule information. To avoid this scenario, ensure that we only
index system modules in the SDK, not local versions.
rdar://102207620
Introduce a new source file kind to describe source files for macro
expansions, and include the macro expression that they expand. This
establishes a "parent" relationship
Also track every kind of auxiliary source file---whether for macro
expansions or other reasons---that is introduced into a module, adding
an operation that allows us to find the source file that contains a
given source location.
Include the parent `ModuleDecl` when serializing a `SILFunction` so that it is available on deserialized functions even though the full `DeclContext` is not present. With the parent module always available we can reliably compute whether the `SILFunction` comes from a module that was imported `@_weakLinked`.
Serialize the `DeclContext` member of `SILFunction` so that it can be used to look up the module that a function belongs to in order to compute weak import status.
Resolves rdar://98521248
The effect of declaring an import `@_weakLinked` is to treat every declaration from the module as if it were declared with `@_weakLinked`. This is useful in environments where entire modules may not be present at runtime. Although it is already possible to instruct the linker to weakly link an entire dylib, a Swift attribute provides a way to declare intent in source code and also opens the door to diagnostics and other compiler behaviors that depend on knowing that all the module's symbols will be weakly linked.
rdar://96098097
* only include the given symbol for qualified imports
rdar://96309088
* re-exporting one type should not allow unrelated types to sneak in
* ensure that children of re-exported types are also re-exported
Remove the allowUnavailable parameter to lookupConformance(), and instead
explicitly check the result for hasUnavailableConformance() in the places
where we used to pass 'false'.
Also, narrow down this check in those places to the Sendable protocol
only, fixing a regression with Hashable conformance synthesis.
Fixes rdar://problem/94460143.
See #59144 for more on why this is a bad idea.
Patch out the synthesized file unit accessor to only clear the source cache, then patch up all the places that were assuming they could iterate over the module's file list and see synthesized files.
rdar://94164512
When determining whether a superclass conforms to a particular protocol,
skip unavailable conformances. This way, we don't minimize away a
constraint that might only apply to subclasses of the specified
superclass.
Fixes rdar://91853658.
When emitting a symbol graph file for a module that import modules via
`@_exported import`, emits those modules' symbols as well.
SR-15753
rdar://89547374
We noticed some Swift clients rely on the serialized search paths in the module to
find dependencies and droping these paths altogether can lead to build failures like
rdar://85840921.
This change teaches the serialization to obfuscate the search paths and the deserialization
to recover them. This allows clients to keep accessing these paths without exposing
them when shipping the module to other users.
We've recently added the -experimental-hermetic-seal-at-link compiler flag,
which turns on aggressive dead-stripping optimizations and assumes that library
code can be optimized against client code because all users of the library
code/types are present at link/LTO time. This means that any module that's
built with -experimental-hermetic-seal-at-link requires all clients of this
module to also use -experimental-hermetic-seal-at-link. This PR enforces that
by storing a bit in the serialized module, and checking the bit when importing
modules.
The MemoryBuffer loader is used by LLDB during debugging to import binary Swift
modules from .swift_ast sections. Modules imported from .swift_ast sections are
never produced from textual interfaces. By disabling resilience the expression
evaluator in the debugger can directly access private members.
rdar://79462915
