Merge pull request #78372 from DougGregor/strict-safety-stdlib

[SE-0458] Adopt strict memory safety in the standard libraries

Author: DougGregor

Runtimes/Core/CMakeLists.txt

@@ -181,7 +181,7 @@ add_compile_options(
   "$<$<COMPILE_LANGUAGE:Swift>:SHELL:-enable-experimental-feature NoncopyableGenerics2>"
   "$<$<COMPILE_LANGUAGE:Swift>:SHELL:-enable-experimental-feature SuppressedAssociatedTypes>"
   "$<$<COMPILE_LANGUAGE:Swift>:SHELL:-enable-experimental-feature SE427NoInferenceOnExtension>"
-  "$<$<COMPILE_LANGUAGE:Swift>:SHELL:-enable-experimental-feature AllowUnsafeAttribute>"
+  "$<$<COMPILE_LANGUAGE:Swift>:SHELL:-strict-memory-safety>"
   "$<$<COMPILE_LANGUAGE:Swift>:SHELL:-enable-experimental-feature NonescapableTypes>"
   "$<$<COMPILE_LANGUAGE:Swift>:SHELL:-enable-experimental-feature LifetimeDependence>"
   "$<$<COMPILE_LANGUAGE:Swift>:SHELL:-enable-experimental-feature MemberImportVisibility>"

lib/Serialization/Serialization.cpp

@@ -862,6 +862,7 @@ void Serializer::writeBlockInfoBlock() {
   BLOCK_RECORD(options_block, HAS_CXX_INTEROPERABILITY_ENABLED);
   BLOCK_RECORD(options_block, ALLOW_NON_RESILIENT_ACCESS);
   BLOCK_RECORD(options_block, SERIALIZE_PACKAGE_ENABLED);
+  BLOCK_RECORD(options_block, STRICT_MEMORY_SAFETY);
   BLOCK_RECORD(options_block, CXX_STDLIB_KIND);
   BLOCK_RECORD(options_block, PUBLIC_MODULE_NAME);
   BLOCK_RECORD(options_block, SWIFT_INTERFACE_COMPILER_VERSION);

stdlib/cmake/modules/SwiftSource.cmake

@@ -628,7 +628,7 @@ function(_compile_swift_files
   list(APPEND swift_flags "-enable-experimental-feature" "NoncopyableGenerics2")
   list(APPEND swift_flags "-enable-experimental-feature" "SuppressedAssociatedTypes")
   list(APPEND swift_flags "-enable-experimental-feature" "SE427NoInferenceOnExtension")
-  list(APPEND swift_flags "-enable-experimental-feature" "AllowUnsafeAttribute")
+
   list(APPEND swift_flags "-enable-experimental-feature" "NonescapableTypes")
   list(APPEND swift_flags "-enable-experimental-feature" "LifetimeDependence")