lld/test/ELF/debug-line-obj.s

   1 # REQUIRES: x86
   2 # RUN: llvm-mc -filetype=obj -triple=x86_64-unknown-linux -dwarf-version=5 %s -o %t.o
   3 # RUN: not ld.lld %t.o -o /dev/null 2>&1 | FileCheck %s
   4
   5 # When compiling with -ffunction-sections, .debug_line may contain descriptions
   6 # of locations from the different text sections. Until relocated such
   7 # descriptions might contain overlapping offsets. Check LLD is able to report
   8 # the error locations correctly in this case.
   9
  10 # CHECK:      error: undefined symbol: foo()
  11 # CHECK-NEXT: >>> referenced by test.cpp:2
  12 # CHECK-NEXT: >>>               {{.*}}.o:(bar())
  13 # CHECK-NEXT: >>> referenced by test.cpp:3
  14 # CHECK-NEXT: >>>               {{.*}}.o:(baz())
  15
  16 # The code below is the reduced version of the output
  17 # from the following invocation and source:
  18 #
  19 # // test.cpp:
  20 # int foo();
  21 # int bar() { return foo(); }
  22 # int baz() { return foo(); }
  23 #
  24 # clang -gdwarf-5 -ffunction-sections test.cpp -o test.s -S
  25
  26 .text
  27 .file  "test.cpp"
  28 .section  .text._Z3barv,"ax",@progbits
  29 .globl  _Z3barv
  30 .type  _Z3barv,@function
  31 _Z3barv:
  32 .Lfunc_begin0:
  33   .file  0 "/path" "test.cpp" md5 0x9ff11a8404ab4d032ee2dd4f5f8c4140
  34   .loc  0 2 0                   # test.cpp:2:0
  35   .loc  0 2 20 prologue_end     # test.cpp:2:20
  36   callq  _Z3foov
  37   .loc  0 2 13 is_stmt 0        # test.cpp:2:13
  38 .Lfunc_end0:
  39 .size  _Z3barv, .Lfunc_end0-_Z3barv
  40                                         # -- End function
  41 .section  .text._Z3bazv,"ax",@progbits
  42 .globl  _Z3bazv                 # -- Begin function _Z3bazv
  43   .type  _Z3bazv,@function
  44 _Z3bazv:                                # @_Z3bazv
  45 .Lfunc_begin1:
  46   .loc  0 3 0 is_stmt 1         # test.cpp:3:0
  47   .loc  0 3 20 prologue_end     # test.cpp:3:20
  48   callq  _Z3foov
  49   .loc  0 3 13 is_stmt 0        # test.cpp:3:13
  50 .Lfunc_end1:
  51   .size  _Z3bazv, .Lfunc_end1-_Z3bazv
  52
  53 .section  .debug_str,"MS",@progbits,1
  54 .Linfo_string0:
  55   .asciz  "stub"
  56
  57 .section  .debug_str_offsets,"",@progbits
  58   .long  8
  59   .short  5
  60   .short  0
  61 .Lstr_offsets_base0:
  62   .long  .Linfo_string0
  63
  64 .section  .debug_abbrev,"",@progbits
  65   .byte  1                       # Abbreviation Code
  66   .byte  17                      # DW_TAG_compile_unit
  67   .byte  1                       # DW_CHILDREN_yes
  68   .byte  37                      # DW_AT_producer
  69   .byte  37                      # DW_FORM_strx1
  70   .byte  19                      # DW_AT_language
  71   .byte  5                       # DW_FORM_data2
  72   .byte  3                       # DW_AT_name
  73   .byte  37                      # DW_FORM_strx1
  74   .byte  114                     # DW_AT_str_offsets_base
  75   .byte  23                      # DW_FORM_sec_offset
  76   .byte  16                      # DW_AT_stmt_list
  77   .byte  23                      # DW_FORM_sec_offset
  78   .byte  27                      # DW_AT_comp_dir
  79   .byte  37                      # DW_FORM_strx1
  80   .byte  115                     # DW_AT_addr_base
  81   .byte  23                      # DW_FORM_sec_offset
  82   .byte  17                      # DW_AT_low_pc
  83   .byte  1                       # DW_FORM_addr
  84   .byte  85                      # DW_AT_ranges
  85   .byte  35                      # DW_FORM_rnglistx
  86   .byte  116                     # DW_AT_rnglists_base
  87   .byte  23                      # DW_FORM_sec_offset
  88   .byte  0                       # EOM(1)
  89   .byte  0                       # EOM(2)
  90   .byte  2                       # Abbreviation Code
  91   .byte  46                      # DW_TAG_subprogram
  92   .byte  0                       # DW_CHILDREN_no
  93   .byte  17                      # DW_AT_low_pc
  94   .byte  27                      # DW_FORM_addrx
  95   .byte  18                      # DW_AT_high_pc
  96   .byte  6                       # DW_FORM_data4
  97   .byte  64                      # DW_AT_frame_base
  98   .byte  24                      # DW_FORM_exprloc
  99   .byte  110                     # DW_AT_linkage_name
 100   .byte  37                      # DW_FORM_strx1
 101   .byte  3                       # DW_AT_name
 102   .byte  37                      # DW_FORM_strx1
 103   .byte  58                      # DW_AT_decl_file
 104   .byte  11                      # DW_FORM_data1
 105   .byte  59                      # DW_AT_decl_line
 106   .byte  11                      # DW_FORM_data1
 107   .byte  73                      # DW_AT_type
 108   .byte  19                      # DW_FORM_ref4
 109   .byte  63                      # DW_AT_external
 110   .byte  25                      # DW_FORM_flag_present
 111   .byte  0                       # EOM(1)
 112   .byte  0                       # EOM(2)
 113   .byte  3                       # Abbreviation Code
 114   .byte  36                      # DW_TAG_base_type
 115   .byte  0                       # DW_CHILDREN_no
 116   .byte  3                       # DW_AT_name
 117   .byte  37                      # DW_FORM_strx1
 118   .byte  62                      # DW_AT_encoding
 119   .byte  11                      # DW_FORM_data1
 120   .byte  11                      # DW_AT_byte_size
 121   .byte  11                      # DW_FORM_data1
 122   .byte  0                       # EOM(1)
 123   .byte  0                       # EOM(2)
 124   .byte  0                       # EOM(3)
 125
 126 .section  .debug_info,"",@progbits
 127 .Lcu_begin0:
 128   .long  .Ldebug_info_end0-.Ldebug_info_start0 # Length of Unit
 129 .Ldebug_info_start0:
 130   .short  5                       # DWARF version number
 131   .byte  1                       # DWARF Unit Type
 132   .byte  8                       # Address Size (in bytes)
 133   .long  .debug_abbrev           # Offset Into Abbrev. Section
 134   .byte  1                       # Abbrev [1] 0xc:0x44 DW_TAG_compile_unit
 135   .byte  0                       # DW_AT_producer
 136   .short  4                       # DW_AT_language
 137   .byte  0                       # DW_AT_name
 138   .long  .Lstr_offsets_base0     # DW_AT_str_offsets_base
 139   .long  .Lline_table_start0     # DW_AT_stmt_list
 140   .byte  2                       # DW_AT_comp_dir
 141   .long  0      # DW_AT_addr_base
 142   .quad  0                       # DW_AT_low_pc
 143   .byte  0                       # DW_AT_ranges
 144   .long  0  # DW_AT_rnglists_base
 145   .byte  2                       # Abbrev [2] 0x2b:0x10 DW_TAG_subprogram
 146   .byte  0                       # DW_AT_low_pc
 147   .long  .Lfunc_end0-.Lfunc_begin0 # DW_AT_high_pc
 148   .byte  1                       # DW_AT_frame_base
 149   .byte  86
 150   .byte  3                       # DW_AT_linkage_name
 151   .byte  0                       # DW_AT_name
 152   .byte  1                       # DW_AT_decl_file
 153   .byte  2                       # DW_AT_decl_line
 154   .long  75                      # DW_AT_type
 155                                         # DW_AT_external
 156   .byte  2                       # Abbrev [2] 0x3b:0x10 DW_TAG_subprogram
 157   .byte  1                       # DW_AT_low_pc
 158   .long  .Lfunc_end1-.Lfunc_begin1 # DW_AT_high_pc
 159   .byte  1                       # DW_AT_frame_base
 160   .byte  86
 161   .byte  6                       # DW_AT_linkage_name
 162   .byte  0                       # DW_AT_name
 163   .byte  1                       # DW_AT_decl_file
 164   .byte  3                       # DW_AT_decl_line
 165   .long  75                      # DW_AT_type
 166                                         # DW_AT_external
 167   .byte  3                       # Abbrev [3] 0x4b:0x4 DW_TAG_base_type
 168   .byte  0                       # DW_AT_name
 169   .byte  5                       # DW_AT_encoding
 170   .byte  4                       # DW_AT_byte_size
 171   .byte  0                       # End Of Children Mark
 172 .Ldebug_info_end0:
 173
 174 .section  .debug_line,"",@progbits
 175 .Lline_table_start0: