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[ELF][test] Improve --wrap tests

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This commit is contained in:
Fangrui Song 2021-01-19 21:05:16 -08:00
parent b5c542d64b
commit 8031785f4a
1 changed files with 49 additions and 15 deletions
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64
lld/test/ELF/wrap-shlib-undefined.s
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@ -1,28 +1,54 @@
# REQUIRES: x86
# RUN: split-file %s %t.dir
# RUN: llvm-mc -filetype=obj -triple=x86_64 %t.dir/main.s -o %t.o
# RUN: echo '.globl bar; bar: call __real_foo' | llvm-mc -filetype=obj -triple=x86_64 - -o %t1.o
# RUN: ld.lld -shared -soname=t.so %t1.o -o %t.so
# RUN: rm -rf %t && split-file %s %t
# RUN: llvm-mc -filetype=obj -triple=x86_64 %t/main.s -o %t/main.o
# RUN: llvm-mc -filetype=obj -triple=x86_64 %t/call-foo.s -o %t/call-foo.o
# RUN: llvm-mc -filetype=obj -triple=x86_64 %t/bar.s -o %t/bar.o
# RUN: ld.lld -shared -soname=t.so %t/bar.o -o %t/bar.so
# RUN: llvm-mc -filetype=obj -triple=x86_64 %t/wrap.s -o %t/wrap.o
# RUN: ld.lld -shared --soname=fixed %t/wrap.o -o %t/wrap.so
# RUN: ld.lld -shared %t/main.o %t/call-foo.o --wrap foo -o %t1.so
# RUN: llvm-readelf -r %t1.so | FileCheck %s --check-prefix=CHECK1
# CHECK1: R_X86_64_JUMP_SLOT 0000000000000000 bar + 0
# CHECK1-NEXT: R_X86_64_JUMP_SLOT 0{{$}}
## --no-allow-shlib-undefined errors because __real_foo is not defined.
# RUN: not ld.lld %t.o %t.so -o /dev/null 2>&1 | FileCheck --check-prefix=ERR %s
# RUN: not ld.lld %t/main.o %t/bar.so -o /dev/null 2>&1 | FileCheck --check-prefix=ERR %s
# ERR: {{.*}}.so: undefined reference to __real_foo [--no-allow-shlib-undefined]
## --wrap=foo defines __real_foo.
# RUN: ld.lld %t.o %t.so --wrap=foo -o %t
# RUN: llvm-readelf --dyn-syms %t | FileCheck %s
# RUN: ld.lld %t/main.o %t/bar.so --wrap=foo -o %t2
# RUN: llvm-readelf --dyn-syms %t2 | FileCheck %s --check-prefix=CHECK2
## The reference __real_foo from %t.so causes foo to be exported.
## The reference __real_foo from %t/bar.so causes foo to be exported.
## __wrap_foo is not used, thus not exported.
# CHECK: Symbol table '.dynsym' contains 3 entries:
# CHECK: NOTYPE LOCAL DEFAULT UND
# CHECK-NEXT: NOTYPE GLOBAL DEFAULT UND bar
# CHECK-NEXT: NOTYPE GLOBAL DEFAULT 6 foo
# CHECK2: Symbol table '.dynsym' contains 3 entries:
# CHECK2: NOTYPE LOCAL DEFAULT UND
# CHECK2-NEXT: NOTYPE GLOBAL DEFAULT UND bar
# CHECK2-NEXT: NOTYPE GLOBAL DEFAULT 6 foo
# RUN: llvm-mc -filetype=obj -triple=x86_64 %t.dir/wrap.s -o %twrap.o
# RUN: ld.lld -shared --soname=fixed %twrap.o -o %twrap.so
# RUN: ld.lld %t.o %twrap.so --wrap bar -o %t1
## __wrap_bar is undefined.
# RUN: ld.lld -shared %t.o --wrap=bar -o %t3.so
# RUN: llvm-readelf -r --dyn-syms %t3.so | FileCheck %s --check-prefix=CHECK3
# CHECK3: R_X86_64_JUMP_SLOT 0{{$}}
# CHECK3: Symbol table '.dynsym' contains 3 entries:
# CHECK3: NOTYPE LOCAL DEFAULT UND
# CHECK3-NEXT: NOTYPE GLOBAL DEFAULT 6 _start
# CHECK3-NEXT: NOTYPE GLOBAL DEFAULT 6 foo
## __wrap_bar is defined in %t/wrap.so.
# RUN: ld.lld -shared %t.o %t/wrap.so --wrap=bar -o %t4.so
# RUN: llvm-readelf -r --dyn-syms %t4.so | FileCheck %s --check-prefix=CHECK4
# CHECK4: R_X86_64_JUMP_SLOT {{.*}} __wrap_bar + 0
# CHECK4: Symbol table '.dynsym' contains 4 entries:
# CHECK4: NOTYPE LOCAL DEFAULT UND
# CHECK4-NEXT: NOTYPE GLOBAL DEFAULT UND __wrap_bar
# CHECK4-NEXT: NOTYPE GLOBAL DEFAULT 6 _start
# CHECK4-NEXT: NOTYPE GLOBAL DEFAULT 6 foo
# RUN: ld.lld %t.o %t/wrap.so --wrap bar -o %t1
# RUN: llvm-readelf --dyn-syms %t1 | FileCheck %s --check-prefix=DYNSYM
# RUN: llvm-objdump -d %t1 | FileCheck %s --check-prefix=ASM
@ -39,6 +65,14 @@ _start:
call bar
foo:
#--- call-foo.s
call foo
#--- bar.s
.globl bar
bar:
call __real_foo
#--- wrap.s
.globl __wrap_bar
__wrap_bar: