test/tools/dsymutil/X86/empty_range.s

   1 # This test verifies that an empty range list in the .debug_ranges section
   2 # doesn't crash dsymutil. As clang does not produce this kind of debug
   3 # info anymore, we used this hand-crafted assembly file to produce a testcase
   4 # Compile with:
   5 #        llvm-mc -triple x86_64-apple-darwin -filetype=obj -o 1.o empty_range.o
   6
   7 # RUN: dsymutil -f -y %p/dummy-debug-map.map -oso-prepend-path %p/../Inputs/empty_range -o - | llvm-dwarfdump -debug-info - | FileCheck %s
   8
   9         .section        __TEXT,__text,regular,pure_instructions
  10         .macosx_version_min 10, 11
  11         .globl  __Z3foov
  12         .align  4, 0x90
  13 __Z3foov:                               ## @_Z3foov
  14 Lfunc_begin0:
  15         pushq   %rbp
  16         movq    %rsp, %rbp
  17         popq    %rbp
  18         retq
  19 Lfunc_end0:
  20         .section        __DWARF,__debug_abbrev,regular,debug
  21 Lsection_abbrev:
  22         .byte   1                       ## Abbreviation Code
  23         .byte   17                      ## DW_TAG_compile_unit
  24         .byte   1                       ## DW_CHILDREN_yes
  25         .byte   0                       ## EOM(1)
  26         .byte   0                       ## EOM(2)
  27         .byte   2                       ## Abbreviation Code
  28         .byte   46                      ## DW_TAG_subprogram
  29         .byte   0                       ## DW_CHILDREN_no
  30         .byte   17                      ## DW_AT_low_pc
  31         .byte   1                       ## DW_FORM_addr
  32         .byte   0x55                    ## DW_AT_ranges
  33         .byte   6                       ## DW_FORM_data4
  34         .byte   0                       ## EOM(1)
  35         .byte   0                       ## EOM(2)
  36         .byte   0                       ## EOM(3)
  37         .section        __DWARF,__debug_info,regular,debug
  38 Lsection_info:
  39         .long   22                      ## Length of Unit
  40         .short  2                       ## DWARF version number
  41         .long   0                       ## Offset Into Abbrev. Section
  42         .byte   8                       ## Address Size (in bytes)
  43         .byte   1                       ## Abbrev [1]  DW_TAG_compile_unit
  44         .byte   2                       ## Abbrev [2] DW_TAG_subprogram
  45         .quad   Lfunc_begin0            ## DW_AT_low_pc
  46         .long   0                       ## DW_AT_ranges (pointing at an empty entry)
  47         .byte   0                       ## End Of Children Mark
  48         .section        __DWARF,__debug_ranges,regular,debug
  49 Ldebug_range:
  50         .long 0
  51         .long 0
  52
  53 # CHECK:  DW_TAG_compile_unit
  54 # CHECK:    DW_TAG_subprogram
  55 # CHECK-NEXT:      DW_AT_low_pc{{.*}}(0x0000000000010000)
  56 # CHECK-NEXT:      DW_AT_ranges{{.*}}(0x00000000)
  57
  58 # There was a bug that would use the currently active object file when a
  59 # debug map object isn't found. Check that we only linked one file.
  60 # CHECK-NOT: DW_TAG_compile_unit
  61