[lld] 9632ce1 - [lld/test/ELF] Test fetch from archive to resolve undefined symbols in shared libs

[Pirama Arumuga Nainar via llvm-commits]

Author: Pirama Arumuga Nainar
Date: 2021-08-27T14:17:32-07:00
New Revision: 9632ce14e4145187b5fe404bc45f092392fd4346

URL: https://github.com/llvm/llvm-project/commit/9632ce14e4145187b5fe404bc45f092392fd4346
DIFF: https://github.com/llvm/llvm-project/commit/9632ce14e4145187b5fe404bc45f092392fd4346.diff

LOG: [lld/test/ELF] Test fetch from archive to resolve undefined symbols in shared libs

Add missing test coverage uncovered in review of D108006.

Differential Revision: https://reviews.llvm.org/D108328

Added: 
    lld/test/ELF/dso-undef-extract-lazy.s

Modified: 
    

Removed: 
    


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diff  --git a/lld/test/ELF/dso-undef-extract-lazy.s b/lld/test/ELF/dso-undef-extract-lazy.s
new file mode 100644
index 0000000000000..40b0758957d7a
--- /dev/null
+++ b/lld/test/ELF/dso-undef-extract-lazy.s
@@ -0,0 +1,40 @@
+# REQUIRES: x86
+# RUN: rm -fr %t && split-file %s %t
+
+## Build an object with a trivial main function
+# RUN: llvm-mc -filetype=obj -triple=x86_64 %t/main.s -o %t1.o
+
+## Build %t.a which defines a global 'foo'
+# RUN: llvm-mc -filetype=obj -triple=x86_64 %t/archive.s -o %t2.o
+# RUN: rm -f %t2.a
+# RUN: llvm-ar rc %t2.a %t2.o
+
+## Build %t.so that has a reference to 'foo'
+# RUN: llvm-mc -filetype=obj -triple=x86_64 %t/shlib.s -o %t3.o
+# RUN: ld.lld %t3.o -o %t3.so -shared
+
+## Test that 'foo' from %t2.a is fetched to define 'foo' needed by %t3.so.
+## Test both cases where the archive is before or after the shared library in
+## link order.
+
+# RUN: ld.lld %t1.o %t2.a %t3.so -o %t.exe
+# RUN: llvm-readelf --dyn-symbols %t.exe | FileCheck %s --check-prefix=CHECK-FETCH
+
+# RUN: ld.lld %t1.o %t3.so %t2.a -o %t.exe
+# RUN: llvm-readelf --dyn-symbols %t.exe | FileCheck %s --check-prefix=CHECK-FETCH
+
+# CHECK-FETCH: GLOBAL DEFAULT {{[0-9]+}} foo
+
+#--- main.s
+.text
+.globl _start
+.type _start, at function
+_start:
+  ret
+
+#--- archive.s
+.global foo
+foo:
+
+#--- shlib.s
+.global foo