llvm/test/MC/ELF/compress-debug-sections-zlib.s

   1 // REQUIRES: zlib
   2
   3 // Check zlib style
   4 // RUN: llvm-mc -filetype=obj -compress-debug-sections=zlib -triple x86_64-pc-linux-gnu < %s -o %t
   5 // RUN: llvm-objdump -s %t | FileCheck %s
   6 // RUN: llvm-dwarfdump -debug-str %t | FileCheck --check-prefix=STR %s
   7 // RUN: llvm-readelf --sections %t | FileCheck --check-prefixes=FLAGS,FLAGS64 %s
   8
   9 // RUN: llvm-mc -filetype=obj -compress-debug-sections=zlib -triple i386-pc-linux-gnu --defsym I386=1 %s -o %t
  10 // RUN: llvm-readelf -S -s %t | FileCheck --check-prefixes=386-SYMBOLS,FLAGS,FLAGS32 %s
  11
  12 // Decompress one valid dwarf section just to check that this roundtrips,
  13 // we use .debug_str section for that
  14 // STR: perfectly compressable data sample *****************************************
  15
  16
  17 // Now check the zlib style output:
  18
  19 // Don't compress small sections, such as this simple debug_abbrev example
  20 // CHECK: Contents of section .debug_abbrev:
  21 // CHECK-NOT: ZLIB
  22 // CHECK-NOT: Contents of
  23 // CHECK: Contents of section .debug_info:
  24 // FIXME: Handle compressing alignment fragments to support compressing debug_frame
  25 // CHECK: Contents of section .debug_frame:
  26 // CHECK-NOT: ZLIB
  27 // CHECK: Contents of
  28
  29 # FLAGS:   .text         PROGBITS [[#%x,]] [[#%x,]] [[#%x,]] 00 AX 0 0  4
  30 # FLAGS:   .nonalloc     PROGBITS [[#%x,]] [[#%x,]] 000226   00    0 0  1
  31
  32 ## Check that the large .debug_line and .debug_frame have the SHF_COMPRESSED
  33 ## flag.
  34 # FLAGS32: .debug_line   PROGBITS [[#%x,]] [[#%x,]] [[#%x,]] 00  C 0 0  4
  35 # FLAGS32: .debug_abbrev PROGBITS [[#%x,]] [[#%x,]] [[#%x,]] 00    0 0  1
  36 # FLAGS32: .debug_info   PROGBITS [[#%x,]] [[#%x,]] [[#%x,]] 00    0 0  1
  37 # FLAGS32: .debug_frame  PROGBITS [[#%x,]] [[#%x,]] [[#%x,]] 00  C 0 0  4
  38
  39 # FLAGS64: .debug_line   PROGBITS [[#%x,]] [[#%x,]] [[#%x,]] 00  C 0 0  8
  40 # FLAGS64: .debug_abbrev PROGBITS [[#%x,]] [[#%x,]] [[#%x,]] 00    0 0  1
  41 # FLAGS64: .debug_info   PROGBITS [[#%x,]] [[#%x,]] [[#%x,]] 00    0 0  1
  42 # FLAGS64: .debug_frame  PROGBITS [[#%x,]] [[#%x,]] [[#%x,]] 00  C 0 0  8
  43
  44 # 386-SYMBOLS: Symbol table '.symtab'
  45 # 386-SYMBOLS: .debug_str
  46
  47 ## Don't compress a section not named .debug_*.
  48         .section .nonalloc,"",@progbits
  49 .rept 50
  50 .asciz "aaaaaaaaaa"
  51 .endr
  52
  53         .section        .debug_line,"",@progbits
  54
  55         .section        .debug_abbrev,"",@progbits
  56 .Lsection_abbrev:
  57         .byte   1                       # Abbreviation Code
  58         .byte   17                      # DW_TAG_compile_unit
  59         .byte   0                       # DW_CHILDREN_no
  60         .byte   27                      # DW_AT_comp_dir
  61         .byte   14                      # DW_FORM_strp
  62         .byte   0                       # EOM(1)
  63         .byte   0                       # EOM(2)
  64
  65         .section        .debug_info,"",@progbits
  66         .long   12                      # Length of Unit
  67         .short  4                       # DWARF version number
  68         .long   .Lsection_abbrev        # Offset Into Abbrev. Section
  69         .byte   8                       # Address Size (in bytes)
  70         .byte   1                       # Abbrev [1] DW_TAG_compile_unit
  71         .long   .Linfo_string0          # DW_AT_comp_dir
  72
  73         .text
  74 foo:
  75         .cfi_startproc
  76         .file 1 "Driver.ii"
  77
  78 .rept 3
  79 .ifdef I386
  80         pushl   %ebp
  81         .cfi_def_cfa_offset 8
  82         .cfi_offset %ebp, -8
  83         movl    %esp, %ebp
  84         .cfi_def_cfa_register %ebp
  85         pushl   %ebx
  86         pushl   %edi
  87         pushl   %esi
  88         .cfi_offset %esi, -20
  89         .cfi_offset %edi, -16
  90         .cfi_offset %ebx, -12
  91         .loc    1 1 1 prologue_end
  92         popl    %esi
  93         popl    %edi
  94         popl    %ebx
  95         popl    %ebp
  96         .cfi_def_cfa %esp, 4
  97 .else
  98         pushq   %rbp
  99         .cfi_def_cfa_offset 16
 100         .cfi_offset %rbp, -16
 101         movq    %rsp, %rbp
 102         .cfi_def_cfa_register %rbp
 103         pushq   %r15
 104         pushq   %r14
 105         pushq   %r13
 106         pushq   %r12
 107         pushq   %rbx
 108         .cfi_offset %rbx, -56
 109         .cfi_offset %r12, -48
 110         .cfi_offset %r13, -40
 111         .cfi_offset %r14, -32
 112         .cfi_offset %r15, -24
 113         .loc    1 1 1 prologue_end
 114         popq    %rbx
 115         popq    %r12
 116         popq    %r13
 117         popq    %r14
 118         popq    %r15
 119         popq    %rbp
 120         .cfi_def_cfa %rsp, 8
 121 .endif
 122 .endr
 123
 124 # pad out the line table to make sure it's big enough to warrant compression
 125         .irpc i, 123456789
 126           .irpc j, 0123456789
 127             .loc 1 \i\j \j
 128             nop
 129            .endr
 130         .endr
 131         .cfi_endproc
 132         .cfi_sections .debug_frame
 133
 134 # Below is the section we will use to check that after compression with llvm-mc,
 135 # llvm-dwarfdump tool will be able to decompress data back and dump it. Data sample
 136 # should be compressable enough, so it is filled with some amount of equal symbols at the end
 137         .section        .debug_str,"MS",@progbits,1
 138 .Linfo_string0:
 139         .asciz  "perfectly compressable data sample *****************************************"