test/tools/llvm-symbolizer/only-empty-ranges.s

   1 # REQUIRES: x86-registered-target
   2 # RUN: llvm-mc -filetype=obj -triple=x86_64-pc-linux %s -o %t.o
   3 # RUN: llvm-symbolizer 0x0 0x2 0x3 0x4 --obj=%t.o | FileCheck %s
   4 # This test makes sure we don't attempt to access out of the line table boundaries
   5 # if the last range is empty.
   6 # Produced from the following program:
   7 # int func(int a) {
   8 #   return 1 + a;
   9 # }
  10 # compiled with clang -O3 -g -S
  11 # Edited by adding a redundant, empty last range.
  12 # The line table (llvm-dwarfdump --debug-line) looks like:
  13 #
  14 # Address            Line   Column File   ISA Discriminator Flags
  15 # ------------------ ------ ------ ------ --- ------------- -------------
  16 # 0x0000000000000000      1      0      1   0             0  is_stmt
  17 # 0x0000000000000000      2     12      1   0             0  is_stmt prologue_end
  18 # 0x0000000000000003      2      3      1   0             0
  19 # 0x0000000000000003      3      3      1   0             0
  20 # 0x0000000000000004      3      3      1   0             0  end_sequence
  21 #
  22 # 0x0 should pick the second line in the table - line 2, col 12
  23 # CHECK:    func
  24 # CHECK:        /scratch/a.cpp:2:12
  25 # 0x2 does not exist in the table, so we should pick the line with a
  26 # lower address that describes the range - in this case, the second line.
  27 # CHECK:    func
  28 # CHECK:        /scratch/a.cpp:2:12
  29 # 0x3 also has a sequence of empty ranges, so we should pick the first range after
  30 # skipping the empty ones.
  31 # This also verifies we don't attempt to access outside boundaries.
  32 # CHECK:    func
  33 # CHECK:        /scratch/a.cpp:3:3
  34 # CHECK: ??
  35 # CHECK: ??:0:0
  36
  37         .text
  38         .file   "a.cpp"
  39         .globl  _Z4funci                # -- Begin function _Z4funci
  40         .p2align        4, 0x90
  41         .type   _Z4funci,@function
  42 _Z4funci:                               # @_Z4funci
  43 .Lfunc_begin0:
  44         .file   1 "/llvm-project" "/scratch/a.cpp"
  45         .loc    1 1 0                   # /scratch/a.cpp:1:0
  46         .cfi_startproc
  47 # %bb.0:
  48         #DEBUG_VALUE: func:a <- $edi
  49                                         # kill: def $edi killed $edi def $rdi
  50         #DEBUG_VALUE: func:a <- $edi
  51         .loc    1 2 12 prologue_end     # /scratch/a.cpp:2:12
  52         leal    1(%rdi), %eax
  53         .loc    1 2 3                   # /scratch/a.cpp:2:3
  54     .loc    1 3 3 is_stmt 0         # this forms an empty range torgether with the previous.
  55         retq
  56 .Ltmp0:
  57 .Lfunc_end0:
  58         .size   _Z4funci, .Lfunc_end0-_Z4funci
  59         .cfi_endproc
  60                                         # -- End function
  61         .section        .debug_str,"MS",@progbits,1
  62 .Linfo_string0:
  63         .asciz  "clang version 7.0.1-6 (tags/RELEASE_701/final)" # string offset=0
  64 .Linfo_string1:
  65         .asciz  "/scratch/a.cpp" # string offset=47
  66 .Linfo_string2:
  67         .asciz  "/llvm-project" # string offset=97
  68 .Linfo_string3:
  69         .asciz  "_Z4funci"              # string offset=146
  70 .Linfo_string4:
  71         .asciz  "func"                  # string offset=155
  72 .Linfo_string5:
  73         .asciz  "int"                   # string offset=160
  74 .Linfo_string6:
  75         .asciz  "a"                     # string offset=164
  76         .section        .debug_loc,"",@progbits
  77 .Ldebug_loc0:
  78         .quad   .Lfunc_begin0-.Lfunc_begin0
  79         .quad   .Lfunc_end0-.Lfunc_begin0
  80         .short  1                       # Loc expr size
  81         .byte   85                      # super-register DW_OP_reg5
  82         .quad   0
  83         .quad   0
  84         .section        .debug_abbrev,"",@progbits
  85         .byte   1                       # Abbreviation Code
  86         .byte   17                      # DW_TAG_compile_unit
  87         .byte   1                       # DW_CHILDREN_yes
  88         .byte   37                      # DW_AT_producer
  89         .byte   14                      # DW_FORM_strp
  90         .byte   19                      # DW_AT_language
  91         .byte   5                       # DW_FORM_data2
  92         .byte   3                       # DW_AT_name
  93         .byte   14                      # DW_FORM_strp
  94         .byte   16                      # DW_AT_stmt_list
  95         .byte   23                      # DW_FORM_sec_offset
  96         .byte   27                      # DW_AT_comp_dir
  97         .byte   14                      # DW_FORM_strp
  98         .ascii  "\264B"                 # DW_AT_GNU_pubnames
  99         .byte   25                      # DW_FORM_flag_present
 100         .byte   17                      # DW_AT_low_pc
 101         .byte   1                       # DW_FORM_addr
 102         .byte   18                      # DW_AT_high_pc
 103         .byte   6                       # DW_FORM_data4
 104         .byte   0                       # EOM(1)
 105         .byte   0                       # EOM(2)
 106         .byte   2                       # Abbreviation Code
 107         .byte   46                      # DW_TAG_subprogram
 108         .byte   1                       # DW_CHILDREN_yes
 109         .byte   17                      # DW_AT_low_pc
 110         .byte   1                       # DW_FORM_addr
 111         .byte   18                      # DW_AT_high_pc
 112         .byte   6                       # DW_FORM_data4
 113         .byte   64                      # DW_AT_frame_base
 114         .byte   24                      # DW_FORM_exprloc
 115         .byte   110                     # DW_AT_linkage_name
 116         .byte   14                      # DW_FORM_strp
 117         .byte   3                       # DW_AT_name
 118         .byte   14                      # DW_FORM_strp
 119         .byte   58                      # DW_AT_decl_file
 120         .byte   11                      # DW_FORM_data1
 121         .byte   59                      # DW_AT_decl_line
 122         .byte   11                      # DW_FORM_data1
 123         .byte   73                      # DW_AT_type
 124         .byte   19                      # DW_FORM_ref4
 125         .byte   63                      # DW_AT_external
 126         .byte   25                      # DW_FORM_flag_present
 127         .byte   0                       # EOM(1)
 128         .byte   0                       # EOM(2)
 129         .byte   3                       # Abbreviation Code
 130         .byte   5                       # DW_TAG_formal_parameter
 131         .byte   0                       # DW_CHILDREN_no
 132         .byte   2                       # DW_AT_location
 133         .byte   23                      # DW_FORM_sec_offset
 134         .byte   3                       # DW_AT_name
 135         .byte   14                      # DW_FORM_strp
 136         .byte   58                      # DW_AT_decl_file
 137         .byte   11                      # DW_FORM_data1
 138         .byte   59                      # DW_AT_decl_line
 139         .byte   11                      # DW_FORM_data1
 140         .byte   73                      # DW_AT_type
 141         .byte   19                      # DW_FORM_ref4
 142         .byte   0                       # EOM(1)
 143         .byte   0                       # EOM(2)
 144         .byte   4                       # Abbreviation Code
 145         .byte   36                      # DW_TAG_base_type
 146         .byte   0                       # DW_CHILDREN_no
 147         .byte   3                       # DW_AT_name
 148         .byte   14                      # DW_FORM_strp
 149         .byte   62                      # DW_AT_encoding
 150         .byte   11                      # DW_FORM_data1
 151         .byte   11                      # DW_AT_byte_size
 152         .byte   11                      # DW_FORM_data1
 153         .byte   0                       # EOM(1)
 154         .byte   0                       # EOM(2)
 155         .byte   0                       # EOM(3)
 156         .section        .debug_info,"",@progbits
 157 .Lcu_begin0:
 158         .long   91                      # Length of Unit
 159         .short  4                       # DWARF version number
 160         .long   .debug_abbrev           # Offset Into Abbrev. Section
 161         .byte   8                       # Address Size (in bytes)
 162         .byte   1                       # Abbrev [1] 0xb:0x54 DW_TAG_compile_unit
 163         .long   .Linfo_string0          # DW_AT_producer
 164         .short  4                       # DW_AT_language
 165         .long   .Linfo_string1          # DW_AT_name
 166         .long   .Lline_table_start0     # DW_AT_stmt_list
 167         .long   .Linfo_string2          # DW_AT_comp_dir
 168                                         # DW_AT_GNU_pubnames
 169         .quad   .Lfunc_begin0           # DW_AT_low_pc
 170         .long   .Lfunc_end0-.Lfunc_begin0 # DW_AT_high_pc
 171         .byte   2                       # Abbrev [2] 0x2a:0x2d DW_TAG_subprogram
 172         .quad   .Lfunc_begin0           # DW_AT_low_pc
 173         .long   .Lfunc_end0-.Lfunc_begin0 # DW_AT_high_pc
 174         .byte   1                       # DW_AT_frame_base
 175         .byte   87
 176         .long   .Linfo_string3          # DW_AT_linkage_name
 177         .long   .Linfo_string4          # DW_AT_name
 178         .byte   1                       # DW_AT_decl_file
 179         .byte   1                       # DW_AT_decl_line
 180         .long   87                      # DW_AT_type
 181                                         # DW_AT_external
 182         .byte   3                       # Abbrev [3] 0x47:0xf DW_TAG_formal_parameter
 183         .long   .Ldebug_loc0            # DW_AT_location
 184         .long   .Linfo_string6          # DW_AT_name
 185         .byte   1                       # DW_AT_decl_file
 186         .byte   1                       # DW_AT_decl_line
 187         .long   87                      # DW_AT_type
 188         .byte   0                       # End Of Children Mark
 189         .byte   4                       # Abbrev [4] 0x57:0x7 DW_TAG_base_type
 190         .long   .Linfo_string5          # DW_AT_name
 191         .byte   5                       # DW_AT_encoding
 192         .byte   4                       # DW_AT_byte_size
 193         .byte   0                       # End Of Children Mark
 194         .section        .debug_macinfo,"",@progbits
 195         .byte   0                       # End Of Macro List Mark
 196         .section        .debug_pubnames,"",@progbits
 197         .long   .LpubNames_end0-.LpubNames_begin0 # Length of Public Names Info
 198 .LpubNames_begin0:
 199         .short  2                       # DWARF Version
 200         .long   .Lcu_begin0             # Offset of Compilation Unit Info
 201         .long   95                      # Compilation Unit Length
 202         .long   42                      # DIE offset
 203         .asciz  "func"                  # External Name
 204         .long   0                       # End Mark
 205 .LpubNames_end0:
 206         .section        .debug_pubtypes,"",@progbits
 207         .long   .LpubTypes_end0-.LpubTypes_begin0 # Length of Public Types Info
 208 .LpubTypes_begin0:
 209         .short  2                       # DWARF Version
 210         .long   .Lcu_begin0             # Offset of Compilation Unit Info
 211         .long   95                      # Compilation Unit Length
 212         .long   87                      # DIE offset
 213         .asciz  "int"                   # External Name
 214         .long   0                       # End Mark
 215 .LpubTypes_end0:
 216
 217         .ident  "clang version 7.0.1-6 (tags/RELEASE_701/final)"
 218         .section        ".note.GNU-stack","",@progbits
 219         .addrsig
 220         .section        .debug_line,"",@progbits
 221 .Lline_table_start0: