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