[PATCH] D103779: [lld/mac] Implement support for searching dylibs with @loader_path/ in install name
Nico Weber via Phabricator via llvm-commits
llvm-commits at lists.llvm.org
Sun Jun 6 18:57:24 PDT 2021
This revision was landed with ongoing or failed builds.
This revision was automatically updated to reflect the committed changes.
Closed by commit rG52489021cf8b: [lld/mac] Implement support for searching dylibs with @loader_path/ in install… (authored by thakis).
Herald added a project: LLVM.
Repository:
rG LLVM Github Monorepo
CHANGES SINCE LAST ACTION
https://reviews.llvm.org/D103779/new/
https://reviews.llvm.org/D103779
Files:
lld/MachO/InputFiles.cpp
lld/test/MachO/link-search-at-loader-path.s
Index: lld/test/MachO/link-search-at-loader-path.s
===================================================================
--- /dev/null
+++ lld/test/MachO/link-search-at-loader-path.s
@@ -0,0 +1,34 @@
+# REQUIRES: x86
+
+# RUN: rm -rf %t; split-file %s %t
+# RUN: mkdir %t/subdir
+
+# RUN: llvm-mc -filetype obj -triple x86_64-apple-darwin %t/foo.s -o %t/foo.o
+# RUN: llvm-mc -filetype obj -triple x86_64-apple-darwin %t/bar.s -o %t/bar.o
+# RUN: llvm-mc -filetype obj -triple x86_64-apple-darwin %t/main.s -o %t/main.o
+
+# RUN: %lld -dylib -install_name @loader_path/libfoo.dylib %t/foo.o -o %t/subdir/libfoo.dylib
+
+## Test that @loader_path is replaced by the actual path, not by install_name.
+# RUN: %lld -dylib -reexport_library %t/subdir/libfoo.dylib -install_name /tmp/libbar.dylib %t/bar.o -o %t/subdir/libbar.dylib
+
+# RUN: %lld -lSystem %t/main.o %t/subdir/libbar.dylib -o %t/test
+# RUN: %lld -dylib -lSystem %t/main.o %t/subdir/libbar.dylib -o %t/libtest.dylib
+
+#--- foo.s
+.globl _foo
+_foo:
+ retq
+
+#--- bar.s
+.globl _bar
+_bar:
+ retq
+
+#--- main.s
+.section __TEXT,__text
+.global _main
+_main:
+ callq _foo
+ callq _bar
+ ret
Index: lld/MachO/InputFiles.cpp
===================================================================
--- lld/MachO/InputFiles.cpp
+++ lld/MachO/InputFiles.cpp
@@ -752,15 +752,15 @@
//
// Re-exports can either refer to on-disk files, or to documents within .tbd
// files.
-DylibFile *findDylib(StringRef path, DylibFile *umbrella,
- const InterfaceFile *currentTopLevelTapi) {
+static DylibFile *findDylib(StringRef path, DylibFile *umbrella,
+ const InterfaceFile *currentTopLevelTapi) {
if (path::is_absolute(path, path::Style::posix))
for (StringRef root : config->systemLibraryRoots)
if (Optional<std::string> dylibPath =
resolveDylibPath((root + path).str()))
return loadDylib(*dylibPath, umbrella);
- // TODO: Expand @loader_path, @rpath etc, handle -dylib_file
+ // TODO: Expand @rpath, handle -dylib_file
SmallString<128> newPath;
if (config->outputType == MH_EXECUTE &&
path.consume_front("@executable_path/")) {
@@ -768,6 +768,9 @@
// lld doesn't currently implement that flag.
path::append(newPath, sys::path::parent_path(config->outputFile), path);
path = newPath;
+ } else if (path.consume_front("@loader_path/")) {
+ path::append(newPath, sys::path::parent_path(umbrella->getName()), path);
+ path = newPath;
}
if (currentTopLevelTapi) {
@@ -808,8 +811,8 @@
return false;
}
-void loadReexport(StringRef path, DylibFile *umbrella,
- const InterfaceFile *currentTopLevelTapi) {
+static void loadReexport(StringRef path, DylibFile *umbrella,
+ const InterfaceFile *currentTopLevelTapi) {
DylibFile *reexport = findDylib(path, umbrella, currentTopLevelTapi);
if (!reexport)
error("unable to locate re-export with install name " + path);
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