[PATCH] D114397: [lld-macho] Mark dylib symbols coming from -weak_framework as weak-def.

[Vy Nguyen via Phabricator via llvm-commits]

oontvoo updated this revision to Diff 389371.
oontvoo added a comment.

reduce diff further


Repository:
  rG LLVM Github Monorepo

CHANGES SINCE LAST ACTION
  https://reviews.llvm.org/D114397/new/

https://reviews.llvm.org/D114397

Files:
  lld/MachO/Symbols.h
  lld/test/MachO/weak-import.s


Index: lld/test/MachO/weak-import.s
===================================================================
--- lld/test/MachO/weak-import.s
+++ lld/test/MachO/weak-import.s
@@ -9,12 +9,12 @@
 # RUN: %lld -lSystem -dylib %t/bar.o -o %t/libbar.dylib
 # RUN: %lld -lSystem -dylib %t/foo.o %t/libbar.dylib -sub_library libbar -o %t/libfoo.dylib
 
-# RUN: %lld -weak-lSystem %t/test.o -weak_framework CoreFoundation -weak_library %t/libfoo.dylib -o %t/test
-# RUN: llvm-objdump --macho --all-headers %t/test | FileCheck %s -DDIR=%t --check-prefixes=WEAK-SYS,WEAK-FOO
+# RUN: %lld -weak-lSystem %t/test.o -weak_framework CoreFoundation -weak_library %t/libfoo.dylib -o %t/test_weak_core
+# RUN: llvm-objdump --macho --all-headers %t/test_weak_core | FileCheck %s -DDIR=%t --check-prefixes=WEAK-SYS,WEAK-FOO
 # RUN: %lld -weak-lSystem %t/test.o \
 # RUN:   -framework CoreFoundation -weak_framework CoreFoundation -framework CoreFoundation \
-# RUN:   %t/libfoo.dylib -weak_library %t/libfoo.dylib %t/libfoo.dylib -o %t/test
-# RUN: llvm-objdump --macho --all-headers %t/test | FileCheck %s -DDIR=%t --check-prefixes=WEAK-SYS,WEAK-FOO
+# RUN:   %t/libfoo.dylib -weak_library %t/libfoo.dylib %t/libfoo.dylib -o %t/test_strong_weak_core
+# RUN: llvm-objdump --macho --all-headers %t/test_strong_weak_core | FileCheck %s -DDIR=%t --check-prefixes=WEAK-SYS,WEAK-FOO
 # RUN: %lld -lSystem -dylib %t/libfoo.dylib %t/weak-ref-only.o -o %t/weak-ref-only
 # RUN: llvm-objdump --macho --all-headers %t/weak-ref-only | FileCheck %s -DDIR=%t --check-prefixes=SYS,WEAK-FOO
 # RUN: %lld -lSystem -dylib %t/libfoo.dylib %t/weak-ref-sub-library.o -o %t/weak-ref-sub-library
@@ -22,6 +22,11 @@
 # RUN: %lld -lSystem -dylib %t/libfoo.dylib %t/mixed-ref.o -o %t/mixed-ref
 # RUN: llvm-objdump --macho --all-headers %t/mixed-ref | FileCheck %s -DDIR=%t --check-prefixes=SYS,FOO
 
+# RUN: %lld -framework CoreFoundation %t/test.o -weak_framework CoreFoundation -o %t/strong_weak_import.out
+# RUN: %lld -weak_framework CoreFoundation %t/test.o -framework CoreFoundation -o %t/weak_strong_import.out
+# RUN: llvm-objdump --macho --bind %t/strong_weak_import.out | FileCheck %s --check-prefix=WEAK-IMP
+# RUN: llvm-objdump --macho --bind %t/weak_strong_import.out | FileCheck %s --check-prefix=WEAK-IMP
+
 # WEAK-SYS:          cmd LC_LOAD_WEAK_DYLIB
 # WEAK-SYS-NEXT: cmdsize
 # WEAK-SYS-NEXT:    name /usr/lib/libSystem.dylib
@@ -42,6 +47,7 @@
 # FOO-NEXT:      cmdsize
 # FOO-NEXT:         name [[DIR]]/libfoo.dylib
 
+# WEAK-IMP: {{.+}} pointer         0 CoreFoundation   __CFBigNumGetInt128 (weak_import)
 #--- foo.s
 .globl _foo
 _foo:
@@ -69,4 +75,5 @@
 #--- test.s
 .globl _main
 _main:
+  movq __CFBigNumGetInt128 at GOTPCREL(%rip), %rax        
   ret
Index: lld/MachO/Symbols.h
===================================================================
--- lld/MachO/Symbols.h
+++ lld/MachO/Symbols.h
@@ -235,8 +235,13 @@
   }
 
   uint64_t getVA() const override;
-  bool isWeakDef() const override { return weakDef; }
-  bool isWeakRef() const override { return refState == RefState::Weak; }
+  bool isWeakDef() const override {
+    return weakDef || (file && dyn_cast<DylibFile>(file)->forceWeakImport);
+  }
+  bool isWeakRef() const override {
+    return refState == RefState::Weak ||
+           (file && dyn_cast<DylibFile>(file)->forceWeakImport);
+  }
   bool isReferenced() const { return refState != RefState::Unreferenced; }
   bool isTlv() const override { return tlv; }
   bool isDynamicLookup() const { return file == nullptr; }


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