Revert "[6.0][immediate] Load Foundation early enough for bridging"

Author: benlangmuir

include/swift/AST/DiagnosticsFrontend.def

@@ -120,8 +120,6 @@ ERROR(error_immediate_mode_missing_library,none,
       (unsigned, StringRef))
 ERROR(error_immediate_mode_primary_file,none,
       "immediate mode is incompatible with -primary-file", ())
-WARNING(warning_immediate_mode_cannot_load_foundation,none,
-        "immediate mode failed to load Foundation: %0", (StringRef))
 ERROR(error_missing_frontend_action,none,
       "no frontend action was selected", ())
 ERROR(error_unsupported_frontend_action, none,

include/swift/Immediate/Immediate.h

@@ -24,7 +24,6 @@
 
 namespace swift {
   class CompilerInstance;
-  class DiagnosticEngine;
   class IRGenOptions;
   class SILOptions;
   class SILModule;
@@ -45,9 +44,6 @@ namespace swift {
 
   int RunImmediatelyFromAST(CompilerInstance &CI);
 
-  /// On platforms that support ObjC bridging from the Foundation framework,
-  /// ensure that Foundation is loaded early enough. Otherwise does nothing.
-  void loadFoundationIfNeeded(DiagnosticEngine &Diags);
 } // end namespace swift
 
 #endif // SWIFT_IMMEDIATE_IMMEDIATE_H

lib/FrontendTool/FrontendTool.cpp

@@ -1942,13 +1942,6 @@ int swift::performFrontend(ArrayRef<const char *> Args,
     return finishDiagProcessing(1, /*verifierEnabled*/ false);
   }
 
-  // Scripts that use the Foundation framework need it loaded early for bridging
-  // to work correctly on Darwin platforms. On other platforms this is a no-op.
-  if (Invocation.getFrontendOptions().RequestedAction ==
-      FrontendOptions::ActionType::Immediate) {
-    loadFoundationIfNeeded(Instance->getDiags());
-  }
-
   // Don't ask clients to report bugs when running a script in immediate mode.
   // When a script asserts the compiler reports the error with the same
   // stacktrace as a compiler crash. From here we can't tell which is which,

lib/Immediate/Immediate.cpp

@@ -431,30 +431,3 @@ int swift::RunImmediatelyFromAST(CompilerInstance &CI) {
 
   return *Result;
 }
-
-void swift::loadFoundationIfNeeded(DiagnosticEngine &Diags) {
-#if defined(__APPLE__)
-  const char *FoundationPath =
-      "/System/Library/Frameworks/Foundation.framework/Foundation";
-  void *handle = dlopen(FoundationPath, RTLD_NOLOAD);
-  if (handle) {
-    // Foundation is already loaded. Use dlclose to release the ref-count that
-    // was incremented by dlopen and return.
-    dlclose(handle);
-    return;
-  } else {
-    // Foundation is not yet loaded. Load it now and leak the handle.
-    // FIXME: it is fragile to load here, as there is no guarantee the swift
-    // runtime has not initialized already. As the compiler adds more swift code
-    // we may need to move this or find another solution.
-    handle = dlopen(FoundationPath, RTLD_LAZY | RTLD_GLOBAL);
-    if (!handle)
-      Diags.diagnose(SourceLoc(),
-                     diag::warning_immediate_mode_cannot_load_foundation,
-                     dlerror());
-  }
-
-#else
-  // Nothing to do.
-#endif
-}