| //===- StripSwiftForceLoad.h ------------------------------------*- C++ -*-===// |
| // |
| // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. |
| // See https://llvm.org/LICENSE.txt for license information. |
| // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception |
| // |
| //===----------------------------------------------------------------------===// |
| |
| #ifndef LLD_MACHO_STRIP_SWIFT_FORCE_LOAD_H |
| #define LLD_MACHO_STRIP_SWIFT_FORCE_LOAD_H |
| |
| namespace lld::macho { |
| |
| // Drop `__DATA,__const` sections that exist only to force-load Swift overlays. |
| // |
| // The Swift compiler emits `__swift_FORCE_LOAD_$_swift<overlay>` pointers in |
| // `__DATA,__const` that bind to the imported symbol of the same name in a |
| // dependent overlay dylib. These pointers are never dereferenced -- they exist |
| // only to keep the overlay dylib linked in. When a section consists entirely of |
| // such pointers (and is not anchored by any externally visible symbol clients |
| // might link against), this pass drops the whole section, reclaiming its bytes |
| // and removing the dyld binds. |
| // |
| // The imported FORCE_LOAD DylibSymbols are intentionally left referenced, so |
| // the overlays' LC_LOAD_DYLIB dependencies are preserved. |
| // |
| // NOTE: Must be run after markLive(). |
| void stripSwiftForceLoadFixups(); |
| |
| } // namespace lld::macho |
| |
| #endif |
