lld/test/ELF/relocatable-comdat.s

   1 # REQUIRES: x86
   2 ## Test that SHT_GROUP sections are retained in relocatable output. The content
   3 ## may be rewritten because group members may change their indices. Additionally,
   4 ## group member may be combined or discarded (e.g. /DISCARD/ or --gc-sections).
   5
   6 # RUN: llvm-mc -filetype=obj -triple=x86_64-pc-linux %s -o %t.o
   7 # RUN: ld.lld -r %t.o %t.o -o %t.ro
   8 # RUN: llvm-readelf -g -S %t.ro | FileCheck %s
   9
  10 # CHECK: Name    Type  Address          Off    Size   ES Flg Lk        Inf   Al
  11 # CHECK: .group  GROUP 0000000000000000 {{.*}} 000014 04     {{[1-9]}} [[#]]  4
  12
  13 # CHECK: COMDAT group section [{{.*}}] `.group' [abc] contains 4 sections:
  14 # CHECK-NEXT: Name
  15 # CHECK-NEXT: .rodata.bar
  16 # CHECK-NEXT: .rodata.foo
  17 # CHECK-NEXT: .text.bar
  18 # CHECK-NEXT: .text.foo
  19
  20 ## Rewrite SHT_GROUP content if some members are combined.
  21 # RUN: echo 'SECTIONS { .rodata : {*(.rodata.*)} .text : {*(.text.*)} }' > %t1.lds
  22 # RUN: ld.lld -r -T %t1.lds %t.o %t.o -o %t1.ro
  23 # RUN: llvm-readelf -g -S %t1.ro | FileCheck %s --check-prefix=SCRIPT1
  24
  25 # SCRIPT1: Name    Type  Address          Off    Size   ES Flg Lk        Inf   Al
  26 # SCRIPT1: .group  GROUP 0000000000000000 {{.*}} 00000c 04     {{[1-9]}} [[#]]  4
  27
  28 # SCRIPT1: COMDAT group section [{{.*}}] `.group' [abc] contains 2 sections:
  29 # SCRIPT1-NEXT: Name
  30 # SCRIPT1-NEXT: .rodata
  31 # SCRIPT1-NEXT: .text
  32
  33 # RUN: echo 'SECTIONS { /DISCARD/ : {*(.rodata.*)} }' > %t2.lds
  34 # RUN: ld.lld -r -T %t2.lds %t.o %t.o -o %t2.ro
  35 # RUN: llvm-readelf -g -S %t2.ro | FileCheck %s --check-prefix=SCRIPT2
  36
  37 ## Handle discarded group members.
  38 # SCRIPT2: [Nr] Name    Type  Address          Off    Size   ES Flg Lk        Inf   Al
  39 # SCRIPT2: [ 2] .group  GROUP 0000000000000000 {{.*}} 00000c 04     {{[1-9]}} [[#]]  4
  40
  41 # SCRIPT2: COMDAT group section [{{.*}}] `.group' [abc] contains 2 sections:
  42 # SCRIPT2-NEXT: Name
  43 # SCRIPT2-NEXT: .text.bar
  44 # SCRIPT2-NEXT: .text.foo
  45
  46 .weak abc
  47 abc:
  48
  49 .section .rodata.bar,"aG",@progbits,abc,comdat
  50 .byte 42
  51 .section .rodata.foo,"aG",@progbits,abc,comdat
  52 .byte 42
  53
  54 .section .text.bar,"axG",@progbits,abc,comdat
  55 .quad 42
  56 .section .text.foo,"axG",@progbits,abc,comdat
  57 .long 42