test/DebugInfo/X86/dwarfdump-bogus-LNE.s

   1 # Test object to verify dwarfdump handles a syntactically correct line-number
   2 # program containing unrecognized extended opcodes.
   3 # RUN: llvm-mc -triple x86_64-unknown-linux %s -filetype=obj -o %t.o
   4 # RUN: llvm-dwarfdump -v %t.o | FileCheck %s
   5 # RUN: llvm-dwarfdump -v %t.o 2>&1 | FileCheck %s --check-prefix=ERR
   6
   7         .section .text
   8         # Dummy function
   9 foo:    ret
  10
  11 # FIXME: When we can dump a line-table without a unit, we could remove
  12 # the .debug_abbrev and .debug_info sections from this test.
  13         .section .debug_abbrev,"",@progbits
  14         .byte 0x01  # Abbrev code
  15         .byte 0x11  # DW_TAG_compile_unit
  16         .byte 0x00  # DW_CHILDREN_no
  17         .byte 0x10  # DW_AT_stmt_list
  18         .byte 0x17  # DW_FORM_sec_offset
  19         .byte 0x00  # EOM(1)
  20         .byte 0x00  # EOM(2)
  21
  22         .section .debug_info,"",@progbits
  23         .long  CU_end-CU_version  # Length of Unit
  24 CU_version:
  25         .short 4               # DWARF version number
  26         .long .debug_abbrev    # Offset Into Abbrev. Section
  27         .byte 8                # Address Size (in bytes)
  28 # The compile-unit DIE, with DW_AT_stmt_list.
  29         .byte 1
  30         .long LT_start
  31         .byte 0 # NULL
  32 CU_end:
  33
  34         .long  CU2_end-CU2_version  # Length of Unit
  35 CU2_version:
  36         .short 4               # DWARF version number
  37         .long .debug_abbrev    # Offset Into Abbrev. Section
  38         .byte 8                # Address Size (in bytes)
  39 # The compile-unit DIE, with DW_AT_stmt_list.
  40         .byte 1
  41         .long LT2_start
  42         .byte 0 # NULL
  43 CU2_end:
  44
  45         .section .debug_line,"",@progbits
  46 # CHECK-LABEL: .debug_line contents:
  47
  48 # DWARF v4 line-table header.
  49 LT_start:
  50         .long   LT_end-LT_version   # Length of Unit (DWARF-32 format)
  51 LT_version:
  52         .short  4               # DWARF version number
  53         .long   LT_header_end-LT_params     # Length of Prologue
  54 LT_params:
  55         .byte   1               # Minimum Instruction Length
  56         .byte   1               # Maximum Operations per Instruction
  57         .byte   1               # Default is_stmt
  58         .byte   -5              # Line Base
  59         .byte   14              # Line Range
  60         .byte   13              # Opcode Base
  61         .byte   0               # Standard Opcode Lengths
  62         .byte   1
  63         .byte   1
  64         .byte   1
  65         .byte   1
  66         .byte   0
  67         .byte   0
  68         .byte   0
  69         .byte   1
  70         .byte   0
  71         .byte   0
  72         .byte   1
  73         # No directories.
  74         .byte   0
  75         # No files.
  76         .byte   0
  77 LT_header_end:
  78         # Bogus extended opcode with zero length.
  79         .byte   0               # Extended opcode indicator.
  80         .byte   0               # LEB length of extended opcode + operands.
  81         # Real opcode and operand.
  82         .byte   0
  83         .byte   9
  84         .byte   2               # DW_LNE_set_address
  85         .quad   .text
  86         # Bogus extended opcode with multibyte LEB length.
  87         .byte   0
  88         .byte   0x82            # Length of 2 but with additional length byte.
  89         .byte   0               # Additional length byte.
  90         .byte   0x47            # Unrecognized opcode...
  91         .byte   0               # with its 1-byte operand.
  92         # Proper end-sequence opcode.
  93         .byte   0
  94         .byte   1
  95         .byte   1               # DW_LNE_end_sequence
  96 LT_end:
  97
  98 # CHECK:      Line table prologue:
  99 # CHECK:      version: 4
 100 # Exact prologue length isn't important but it tells us where to expect the
 101 # line-number program to start, and we do want to verify those offsets.
 102 # CHECK-NEXT: prologue_length: 0x00000014
 103 # CHECK:      0x0000001e: 00 Badly formed extended line op
 104 # CHECK-NEXT: 0x00000020: 00 DW_LNE_set_address
 105 # CHECK-NEXT: 0x0000002b: 00 Unrecognized extended op 0x47 length 2
 106 # CHECK-NEXT: 0x00000030: 00 DW_LNE_end_sequence
 107 # CHECK-NEXT: 0x0000000000000000 {{.*}} is_stmt end_sequence
 108
 109
 110 # DWARF v4 line-table header #2.
 111 LT2_start:
 112         .long   LT2_end-LT2_version   # Length of Unit (DWARF-32 format)
 113 LT2_version:
 114         .short  4               # DWARF version number
 115         .long   LT2_header_end-LT2_params   # Length of Prologue
 116 LT2_params:
 117         .byte   1               # Minimum Instruction Length
 118         .byte   1               # Maximum Operations per Instruction
 119         .byte   1               # Default is_stmt
 120         .byte   -5              # Line Base
 121         .byte   14              # Line Range
 122         .byte   13              # Opcode Base
 123         .byte   0               # Standard Opcode Lengths
 124         .byte   1
 125         .byte   1
 126         .byte   1
 127         .byte   1
 128         .byte   0
 129         .byte   0
 130         .byte   0
 131         .byte   1
 132         .byte   0
 133         .byte   0
 134         .byte   1
 135         # No directories.
 136         .byte   0
 137         # No files.
 138         .byte   0
 139 LT2_header_end:
 140         # Real opcode and operand.
 141         .byte   0
 142         .byte   9
 143         .byte   2               # DW_LNE_set_address
 144         .quad   .text
 145         # Real opcode with incorrect length.
 146         .byte   0
 147         .byte   2               # Wrong length, should be 1.
 148         .byte   1               # DW_LNE_end_sequence
 149 LT2_end:
 150
 151 # ERR:      warning: unexpected line op length at offset 0x0000005e
 152 # ERR-SAME: expected 0x02 found 0x01