lldb/test/Shell/SymbolFile/DWARF/x86/array-sizes.s

   1 # This tests a bug where we would incorrectly parse the size of an array if that
   2 # size happened to match an existing DIE offset. This happened because we
   3 # misinterpreted that value as a reference to a DIE specifying the VLA size even
   4 # though the form was a data form (as it should be).
   5
   6 # REQUIRES: lld
   7
   8 # RUN: llvm-mc -triple x86_64-pc-linux %s -filetype=obj > %t.o
   9 # RUN: ld.lld %t.o -o %t
  10 # RUN: lldb-test symbols %t | FileCheck %s
  11
  12 # CHECK: Variable{0x0000001e}, name = "X"
  13 # CHECK-SAME: type = {0000000000000033} 0x{{[0-9A-F]*}} (char[56])
  14
  15
  16 # Generated from "char X[47];"
  17 # The array size was modified by hand.
  18
  19         .text
  20         .file   "-"
  21         .file   1 "/tmp" "<stdin>"
  22         .type   X,@object               # @X
  23         .comm   X,63,16
  24         .section        .debug_str,"MS",@progbits,1
  25 .Linfo_string0:
  26         .asciz  "clang version 8.0.0 (trunk 349604) (llvm/trunk 349608)" # string offset=0
  27 .Linfo_string1:
  28         .asciz  "-"                     # string offset=55
  29 .Linfo_string2:
  30         .asciz  "/tmp"                  # string offset=57
  31 .Linfo_string3:
  32         .asciz  "X"                     # string offset=62
  33 .Linfo_string4:
  34         .asciz  "char"                  # string offset=64
  35 .Linfo_string5:
  36         .asciz  "__ARRAY_SIZE_TYPE__"   # string offset=69
  37         .section        .debug_abbrev,"",@progbits
  38         .byte   1                       # Abbreviation Code
  39         .byte   17                      # DW_TAG_compile_unit
  40         .byte   1                       # DW_CHILDREN_yes
  41         .byte   37                      # DW_AT_producer
  42         .byte   14                      # DW_FORM_strp
  43         .byte   19                      # DW_AT_language
  44         .byte   5                       # DW_FORM_data2
  45         .byte   3                       # DW_AT_name
  46         .byte   14                      # DW_FORM_strp
  47         .byte   16                      # DW_AT_stmt_list
  48         .byte   23                      # DW_FORM_sec_offset
  49         .byte   27                      # DW_AT_comp_dir
  50         .byte   14                      # DW_FORM_strp
  51         .byte   0                       # EOM(1)
  52         .byte   0                       # EOM(2)
  53         .byte   2                       # Abbreviation Code
  54         .byte   52                      # DW_TAG_variable
  55         .byte   0                       # DW_CHILDREN_no
  56         .byte   3                       # DW_AT_name
  57         .byte   14                      # DW_FORM_strp
  58         .byte   73                      # DW_AT_type
  59         .byte   19                      # DW_FORM_ref4
  60         .byte   63                      # DW_AT_external
  61         .byte   25                      # DW_FORM_flag_present
  62         .byte   58                      # DW_AT_decl_file
  63         .byte   11                      # DW_FORM_data1
  64         .byte   59                      # DW_AT_decl_line
  65         .byte   11                      # DW_FORM_data1
  66         .byte   2                       # DW_AT_location
  67         .byte   24                      # DW_FORM_exprloc
  68         .byte   0                       # EOM(1)
  69         .byte   0                       # EOM(2)
  70         .byte   3                       # Abbreviation Code
  71         .byte   1                       # DW_TAG_array_type
  72         .byte   1                       # DW_CHILDREN_yes
  73         .byte   73                      # DW_AT_type
  74         .byte   19                      # DW_FORM_ref4
  75         .byte   0                       # EOM(1)
  76         .byte   0                       # EOM(2)
  77         .byte   4                       # Abbreviation Code
  78         .byte   33                      # DW_TAG_subrange_type
  79         .byte   0                       # DW_CHILDREN_no
  80         .byte   73                      # DW_AT_type
  81         .byte   19                      # DW_FORM_ref4
  82         .byte   55                      # DW_AT_count
  83         .byte   11                      # DW_FORM_data1
  84         .byte   0                       # EOM(1)
  85         .byte   0                       # EOM(2)
  86         .byte   5                       # Abbreviation Code
  87         .byte   36                      # DW_TAG_base_type
  88         .byte   0                       # DW_CHILDREN_no
  89         .byte   3                       # DW_AT_name
  90         .byte   14                      # DW_FORM_strp
  91         .byte   62                      # DW_AT_encoding
  92         .byte   11                      # DW_FORM_data1
  93         .byte   11                      # DW_AT_byte_size
  94         .byte   11                      # DW_FORM_data1
  95         .byte   0                       # EOM(1)
  96         .byte   0                       # EOM(2)
  97         .byte   6                       # Abbreviation Code
  98         .byte   36                      # DW_TAG_base_type
  99         .byte   0                       # DW_CHILDREN_no
 100         .byte   3                       # DW_AT_name
 101         .byte   14                      # DW_FORM_strp
 102         .byte   11                      # DW_AT_byte_size
 103         .byte   11                      # DW_FORM_data1
 104         .byte   62                      # DW_AT_encoding
 105         .byte   11                      # DW_FORM_data1
 106         .byte   0                       # EOM(1)
 107         .byte   0                       # EOM(2)
 108         .byte   0                       # EOM(3)
 109         .section        .debug_info,"",@progbits
 110 .Lcu_begin0:
 111         .long   .Ldebug_info_end0-.Ldebug_info_start0 # Length of Unit
 112 .Ldebug_info_start0:
 113         .short  4                       # DWARF version number
 114         .long   .debug_abbrev           # Offset Into Abbrev. Section
 115         .byte   8                       # Address Size (in bytes)
 116         .byte   1                       # Abbrev [1] 0xb:0x43 DW_TAG_compile_unit
 117         .long   .Linfo_string0          # DW_AT_producer
 118         .short  12                      # DW_AT_language
 119         .long   .Linfo_string1          # DW_AT_name
 120         .long   0                       # DW_AT_stmt_list
 121         .long   .Linfo_string2          # DW_AT_comp_dir
 122         .byte   2                       # Abbrev [2] 0x1e:0x15 DW_TAG_variable
 123         .long   .Linfo_string3          # DW_AT_name
 124         .long   51                      # DW_AT_type
 125                                         # DW_AT_external
 126         .byte   1                       # DW_AT_decl_file
 127         .byte   1                       # DW_AT_decl_line
 128         .byte   9                       # DW_AT_location
 129         .byte   3
 130         .quad   X
 131         .byte   3                       # Abbrev [3] 0x33:0xc DW_TAG_array_type
 132         .long   63                      # DW_AT_type
 133 .Ldie:
 134         .byte   4                       # Abbrev [4] 0x38:0x6 DW_TAG_subrange_type
 135         .long   70                      # DW_AT_type
 136         .byte   .Ldie-.Lcu_begin0       # DW_AT_count - should match the offset of an existing die
 137         .byte   0                       # End Of Children Mark
 138         .byte   5                       # Abbrev [5] 0x3f:0x7 DW_TAG_base_type
 139         .long   .Linfo_string4          # DW_AT_name
 140         .byte   6                       # DW_AT_encoding
 141         .byte   1                       # DW_AT_byte_size
 142         .byte   6                       # Abbrev [6] 0x46:0x7 DW_TAG_base_type
 143         .long   .Linfo_string5          # DW_AT_name
 144         .byte   8                       # DW_AT_byte_size
 145         .byte   7                       # DW_AT_encoding
 146         .byte   0                       # End Of Children Mark
 147 .Ldebug_info_end0: