# REQUIRES: x86
## Verify that we can correctly wrap symbols produced only during LTO codegen
## and unreferenced before then.
# RUN: rm -rf %t && split-file %s %t
# RUN: llvm-mc -triple x86_64-elf --filetype=obj -o %t/unwind.o %t/unwind.s
# RUN: ld.lld -shared -o %t/libunwind.so -soname libunwind.so %t/unwind.o
# RUN: llvm-as -o %t/resume.bc %t/resume.ll
# RUN: ld.lld -shared -o %t/libresume.so -soname libresume.so %t/resume.bc \
# RUN: %t/libunwind.so --wrap _Unwind_Resume
# RUN: llvm-objdump --no-print-imm-hex --dynamic-reloc --disassemble %t/libresume.so | \
# RUN: FileCheck --check-prefix=UNWIND-DISASM %s
# RUN: llvm-readelf --dyn-syms %t/libresume.so | \
# RUN: FileCheck --check-prefix=UNWIND-DYNSYM %s
# UNWIND-DISASM: [[#%x,RELOC:]] R_X86_64_JUMP_SLOT __wrap__Unwind_Resume
# UNWIND-DISASM-LABEL: <_Z1fv>:
# UNWIND-DISASM: callq {{.*}}<__wrap__Unwind_Resume@plt>
# UNWIND-DISASM-LABEL: <__wrap__Unwind_Resume@plt>:
# UNWIND-DISASM-NEXT: jmpq *[[#]](%rip) # [[#%#x,RELOC]]
# UNWIND-DYNSYM: Symbol table '.dynsym' contains 4 entries:
# UNWIND-DYNSYM: NOTYPE LOCAL DEFAULT UND
# UNWIND-DYNSYM-NEXT: NOTYPE GLOBAL DEFAULT UND throw
# UNWIND-DYNSYM-NEXT: NOTYPE GLOBAL DEFAULT UND __wrap__Unwind_Resume
# UNWIND-DYNSYM-NEXT: FUNC GLOBAL DEFAULT 9 _Z1fv
# RUN: llvm-mc -triple x86_64-elf -filetype=obj -o %t/malloc.o %t/malloc.s
# RUN: ld.lld -shared -o %t/libmalloc.so -soname libmalloc.so %t/malloc.o
# RUN: llvm-mc -triple x86_64-elf -filetype=obj -o %t/emutls.o %t/emutls.s
# RUN: llvm-as -o %t/usetls.bc %t/usetls.ll
# RUN: ld.lld -shared -o %t/libusetls.so \
# RUN: %t/usetls.bc %t/libmalloc.so \
# RUN: --start-lib %t/emutls.o -mllvm -emulated-tls --wrap malloc
# RUN: llvm-objdump --no-print-imm-hex --dynamic-reloc --disassemble %t/libusetls.so | \
# RUN: FileCheck --check-prefix=USETLS-DISASM %s
# RUN: llvm-readelf --dyn-syms %t/libusetls.so | \
# RUN: FileCheck --check-prefix=USETLS-DYNSYM %s
# USETLS-DISASM: [[#%x,RELOC:]] R_X86_64_JUMP_SLOT __wrap_malloc
# USETLS-DISASM-LABEL: <__emutls_get_address>:
# USETLS-DISASM-NEXT: jmp{{.*}}<__wrap_malloc@plt>
# USETLS-DISASM-LABEL: <__wrap_malloc@plt>:
# USETLS-DISASM-NEXT: jmpq *[[#]](%rip) # [[#%#x,RELOC]]
# USETLS-DYNSYM: Symbol table '.dynsym' contains 5 entries:
# USETLS-DYNSYM: NOTYPE LOCAL DEFAULT UND
# USETLS-DYNSYM-NEXT: NOTYPE GLOBAL DEFAULT UND __wrap_malloc
# USETLS-DYNSYM-NEXT: FUNC GLOBAL DEFAULT 6 f
# USETLS-DYNSYM-NEXT: NOTYPE GLOBAL DEFAULT 6 __emutls_get_address
#--- unwind.s
.globl _Unwind_Resume
.globl __wrap__Unwind_Resume
_Unwind_Resume:
__wrap__Unwind_Resume:
retq
#--- resume.ll
target datalayout = "e-m:e-p270:32:32-p271:32:32-p272:64:64-i64:64-f80:128-n8:16:32:64-S128"
target triple = "x86_64-unknown-linux-gnu"
define dso_local void @_Z1fv() optnone noinline personality ptr @throw {
invoke void @throw()
to label %unreachable unwind label %lpad
lpad:
%1 = landingpad { ptr, i32 }
cleanup
resume { ptr, i32 } %1
unreachable:
unreachable
}
declare void @throw()
#--- malloc.s
.globl malloc
malloc:
retq
#--- emutls.s
.globl __emutls_get_address
__emutls_get_address:
jmp malloc@plt
#--- usetls.ll
target datalayout = "e-m:e-p270:32:32-p271:32:32-p272:64:64-i64:64-f80:128-n8:16:32:64-S128"
target triple = "x86_64-unknown-linux-gnu"
@x = dso_local thread_local global i32 0, align 4
define dso_local i32 @f() {
%loaded = load i32, ptr @x, align 4
ret i32 %loaded
}
Codebase Browser
llvm