llvm/test/DebugInfo/Inputs/typeunit-header.s

   1 # Test object with an artifically constructed type unit header to verify
   2 # that the length field is correctly used to verify the validity of the
   3 # type_offset field.
   4 #
   5 # To generate the test object:
   6 # llvm-mc -triple x86_64-unknown-linux typeunit-header.s -filetype=obj \
   7 #         -o typeunit-header.elf-x86-64
   8 #
   9 # We only have an abbreviation for the type unit die which is all we need.
  10 # Real type unit dies have quite different attributes of course, but we
  11 # just need to demonstrate an issue with validating length, so we just give it
  12 # a single visibility attribute.
  13         .section .debug_abbrev,"",@progbits
  14         .byte 0x01  # Abbrev code
  15         .byte 0x41  # DW_TAG_type_unit
  16         .byte 0x01  # DW_CHILDREN_yes
  17         .byte 0x17  # DW_AT_visibility
  18         .byte 0x0b  # DW_FORM_data1
  19         .byte 0x00  # EOM(1)
  20         .byte 0x00  # EOM(2)
  21         .byte 0x02  # Abbrev code
  22         .byte 0x13  # DW_TAG_structure_type
  23         .byte 0x00  # DW_CHILDREN_no (no members)
  24         .byte 0x17  # DW_AT_visibility
  25         .byte 0x0b  # DW_FORM_data1
  26         .byte 0x00  # EOM(1)
  27         .byte 0x00  # EOM(2)
  28         .byte 0x00  # EOM(3)
  29
  30         .section .debug_types,"",@progbits
  31 # DWARF v4 Type unit header - DWARF32 format.
  32 TU_4_32_start:
  33         .long TU_4_32_end-TU_4_32_version  # Length of Unit
  34 TU_4_32_version:
  35         .short 4               # DWARF version number
  36         .long .debug_abbrev    # Offset Into Abbrev. Section
  37         .byte 8                # Address Size (in bytes)
  38         .quad 0x0011223344556677 # Type Signature
  39         .long TU_4_32_type-TU_4_32_start # Type offset
  40 # The type-unit DIE, which has just a visibility attribute.
  41         .byte 1                # Abbreviation code
  42         .byte 1                # DW_VIS_local
  43 # The type DIE, which also just has a one-byte visibility attribute.
  44 TU_4_32_type:
  45         .byte 2                # Abbreviation code
  46         .byte 1                # DW_VIS_local
  47         .byte 0 # NULL
  48         .byte 0 # NULL
  49 TU_4_32_end: