[stdlib] ManagedBuffer independent of malloc_size.

include/swift/AST/PlatformKinds.def

@@ -32,5 +32,6 @@ AVAILABILITY_PLATFORM(watchOSApplicationExtension, "application extensions for w
 AVAILABILITY_PLATFORM(macOSApplicationExtension, "application extensions for macOS")
 AVAILABILITY_PLATFORM(macCatalyst, "Mac Catalyst")
 AVAILABILITY_PLATFORM(macCatalystApplicationExtension, "application extensions for Mac Catalyst")
+AVAILABILITY_PLATFORM(OpenBSD, "OpenBSD")
 
 #undef AVAILABILITY_PLATFORM

lib/AST/PlatformKind.cpp

@@ -87,6 +87,8 @@ static bool isPlatformActiveForTarget(PlatformKind Platform,
     case PlatformKind::watchOS:
     case PlatformKind::watchOSApplicationExtension:
       return Target.isWatchOS();
+    case PlatformKind::OpenBSD:
+      return Target.isOSOpenBSD();
     case PlatformKind::none:
       llvm_unreachable("handled above");
   }

lib/ClangImporter/ClangImporter.cpp

@@ -1930,6 +1930,10 @@ PlatformAvailability::PlatformAvailability(const LangOptions &langOpts)
         "APIs deprecated as of macOS 10.9 and earlier are unavailable in Swift";
     break;
 
+  case PlatformKind::OpenBSD:
+    deprecatedAsUnavailableMessage = "";
+    break;
+
   case PlatformKind::none:
     break;
   }
@@ -1962,6 +1966,9 @@ bool PlatformAvailability::isPlatformRelevant(StringRef name) const {
   case PlatformKind::watchOSApplicationExtension:
     return name == "watchos" || name == "watchos_app_extension";
 
+  case PlatformKind::OpenBSD:
+    return name == "openbsd";
+
   case PlatformKind::none:
     return false;
   }
@@ -2001,6 +2008,10 @@ bool PlatformAvailability::treatDeprecatedAsUnavailable(
   case PlatformKind::watchOSApplicationExtension:
     // No deprecation filter on watchOS
     return false;
+
+  case PlatformKind::OpenBSD:
+    // No deprecation filter on OpenBSD
+    return false;
   }
 
   llvm_unreachable("Unexpected platform");

lib/PrintAsObjC/DeclAndTypePrinter.cpp

@@ -852,6 +852,9 @@ class DeclAndTypePrinter::Implementation
       case PlatformKind::watchOSApplicationExtension:
         plat = "watchos_app_extension";
         break;
+      case PlatformKind::OpenBSD:
+        plat = "openbsd";
+        break;
       case PlatformKind::none:
         llvm_unreachable("handled above");
       }

lib/SymbolGraphGen/AvailabilityMixin.cpp

@@ -56,6 +56,8 @@ StringRef getDomain(const AvailableAttr &AvAttr) {
       return { "tvOSAppExtension" };
     case swift::PlatformKind::watchOSApplicationExtension:
       return { "watchOSAppExtension" };
+    case swift::PlatformKind::OpenBSD:
+      return { "OpenBSD" };
     case swift::PlatformKind::none:
       return { "*" };
   }

lib/TBDGen/TBDGen.cpp

@@ -249,6 +249,8 @@ getLinkerPlatformId(OriginallyDefinedInAttr::ActiveVersion Ver) {
   switch(Ver.Platform) {
   case swift::PlatformKind::none:
     llvm_unreachable("cannot find platform kind");
+  case swift::PlatformKind::OpenBSD:
+    llvm_unreachable("not used for this platform");
   case swift::PlatformKind::iOS:
   case swift::PlatformKind::iOSApplicationExtension:
     return Ver.IsSimulator ? LinkerPlatformId::iOS_sim:

stdlib/public/core/BridgingBuffer.swift

@@ -25,6 +25,7 @@ internal final class __BridgingBufferStorage
 internal typealias _BridgingBuffer
   = ManagedBufferPointer<_BridgingBufferHeader, AnyObject>
 
+@available(OpenBSD, unavailable, message: "malloc_size is unavailable.")
 extension ManagedBufferPointer
 where Header == _BridgingBufferHeader, Element == AnyObject {
   internal init(_ count: Int) {

stdlib/public/core/ManagedBuffer.swift

@@ -83,6 +83,7 @@ extension ManagedBuffer {
   /// idea to store this information in the "header" area when
   /// an instance is created.
   @inlinable
+  @available(OpenBSD, unavailable, message: "malloc_size is unavailable.")
   public final var capacity: Int {
     let storageAddr = UnsafeMutableRawPointer(Builtin.bridgeToRawPointer(self))
     let endAddr = storageAddr + _swift_stdlib_malloc_size(storageAddr)
@@ -197,6 +198,7 @@ public struct ManagedBufferPointer<Header, Element> {
   ///   properties.  The `deinit` of `bufferClass` must destroy its
   ///   stored `Header` and any constructed `Element`s.
   @inlinable
+  @available(OpenBSD, unavailable, message: "malloc_size is unavailable.")
   public init(
     bufferClass: AnyClass,
     minimumCapacity: Int,
@@ -329,6 +331,7 @@ extension ManagedBufferPointer {
   /// idea to store this information in the "header" area when
   /// an instance is created.
   @inlinable
+  @available(OpenBSD, unavailable, message: "malloc_size is unavailable.")
   public var capacity: Int {
     return (
       _capacityInBytes &- ManagedBufferPointer._elementOffset
@@ -431,6 +434,7 @@ extension ManagedBufferPointer {
 
   /// The actual number of bytes allocated for this object.
   @inlinable
+  @available(OpenBSD, unavailable, message: "malloc_size is unavailable.")
   internal var _capacityInBytes: Int {
     return _swift_stdlib_malloc_size(_address)
   }

test/IDE/complete_decl_attribute.swift

@@ -39,6 +39,7 @@ struct MyStruct {}
 // AVAILABILITY1-NEXT: Keyword/None:                       macOSApplicationExtension[#Platform#]; name=macOSApplicationExtension{{$}}
 // AVAILABILITY1-NEXT: Keyword/None:                       macCatalyst[#Platform#]; name=macCatalyst
 // AVAILABILITY1-NEXT: Keyword/None:                       macCatalystApplicationExtension[#Platform#]; name=macCatalystApplicationExtension
+// AVAILABILITY1-NEXT: Keyword/None:                       OpenBSD[#Platform#]; name=OpenBSD{{$}}
 // AVAILABILITY1-NEXT: End completions
 
 @available(*, #^AVAILABILITY2^#)

test/Interpreter/generic_ref_counts.swift

@@ -1,5 +1,6 @@
 // RUN: %target-run-simple-swift | %FileCheck %s
 // REQUIRES: executable_test
+// XFAIL: OS=openbsd
 
 import Swift
 

test/stdlib/ManagedBuffer.swift

@@ -11,6 +11,7 @@
 //===----------------------------------------------------------------------===//
 // RUN: %target-run-simple-swift
 // REQUIRES: executable_test
+// XFAIL: OS=openbsd
 
 import StdlibUnittest
 

tools/SourceKit/lib/SwiftLang/SwiftDocSupport.cpp

@@ -674,6 +674,7 @@ static void reportAttributes(ASTContext &Ctx,
   static UIdent PlatformOSXAppExt("source.availability.platform.osx_app_extension");
   static UIdent PlatformtvOSAppExt("source.availability.platform.tvos_app_extension");
   static UIdent PlatformWatchOSAppExt("source.availability.platform.watchos_app_extension");
+  static UIdent PlatformOpenBSD("source.availability.platform.openbsd");
   std::vector<const DeclAttribute*> Scratch;
 
   for (auto Attr : getDeclAttributes(D, Scratch)) {
@@ -702,6 +703,8 @@ static void reportAttributes(ASTContext &Ctx,
         PlatformUID = PlatformtvOSAppExt; break;
       case PlatformKind::watchOSApplicationExtension:
         PlatformUID = PlatformWatchOSAppExt; break;
+      case PlatformKind::OpenBSD:
+        PlatformUID = PlatformOpenBSD; break;
       }
 
       AvailableAttrInfo Info;