test/MC/ELF/compression.s

   1 // REQUIRES: zlib
   2 // Check zlib-gnu style
   3 // RUN: llvm-mc -filetype=obj -compress-debug-sections=zlib-gnu -triple x86_64-pc-linux-gnu < %s -o %t
   4 // RUN: llvm-objdump -s %t | FileCheck --check-prefix=CHECK-GNU-STYLE %s
   5 // RUN: llvm-dwarfdump -debug-str %t | FileCheck --check-prefix=STR %s
   6 // RUN: llvm-mc -filetype=obj -compress-debug-sections=zlib-gnu -triple i386-pc-linux-gnu < %s \
   7 // RUN:     | llvm-readobj --symbols - | FileCheck --check-prefix=386-SYMBOLS-GNU %s
   8
   9 // Check zlib style
  10 // RUN: llvm-mc -filetype=obj -compress-debug-sections=zlib -triple x86_64-pc-linux-gnu < %s -o %t
  11 // RUN: llvm-objdump -s %t | FileCheck --check-prefix=CHECK-ZLIB-STYLE %s
  12 // RUN: llvm-dwarfdump -debug-str %t | FileCheck --check-prefix=STR %s
  13 // RUN: llvm-readobj --sections %t | FileCheck --check-prefixes=ZLIB-STYLE-FLAGS,ZLIB-STYLE-FLAGS64 %s
  14
  15 // RUN: llvm-mc -filetype=obj -compress-debug-sections=zlib -triple i386-pc-linux-gnu < %s -o %t
  16 // RUN: llvm-readobj --symbols -S %t \
  17 // RUN:   | FileCheck --check-prefixes=386-SYMBOLS-ZLIB,ZLIB-STYLE-FLAGS,ZLIB-STYLE-FLAGS32 %s
  18
  19 // Don't compress small sections, such as this simple debug_abbrev example
  20 // CHECK-GNU-STYLE: Contents of section .debug_abbrev:
  21 // CHECK-GNU-STYLE-NOT: ZLIB
  22 // CHECK-GNU-STYLE-NOT: Contents of
  23
  24 // CHECK-GNU-STYLE: Contents of section .debug_info:
  25
  26 // CHECK-GNU-STYLE: Contents of section .zdebug_str:
  27 // Check for the 'ZLIB' file magic at the start of the section only
  28 // CHECK-GNU-STYLE-NEXT: ZLIB
  29 // CHECK-GNU-STYLE-NOT: ZLIB
  30 // FIXME: Handle compressing alignment fragments to support compressing debug_frame
  31 // CHECK-GNU-STYLE: Contents of section .debug_frame:
  32 // CHECK-GNU-STYLE-NOT: ZLIB
  33 // CHECK-GNU-STYLE: Contents of
  34
  35 // Decompress one valid dwarf section just to check that this roundtrips,
  36 // we use .zdebug_str section for that
  37 // STR: perfectly compressable data sample *****************************************
  38
  39 // In x86 32 bit named symbols are used for temporary symbols in merge
  40 // sections, so make sure we handle symbols inside compressed sections
  41 // 386-SYMBOLS-GNU: Name: .Linfo_string0
  42 // 386-SYMBOLS-GNU-NOT: }
  43 // 386-SYMBOLS-GNU: Section: .zdebug_str
  44
  45 // Now check the zlib style output:
  46
  47 // Don't compress small sections, such as this simple debug_abbrev example
  48 // CHECK-ZLIB-STYLE: Contents of section .debug_abbrev:
  49 // CHECK-ZLIB-STYLE-NOT: ZLIB
  50 // CHECK-ZLIB-STYLE-NOT: Contents of
  51 // CHECK-ZLIB-STYLE: Contents of section .debug_info:
  52 // FIXME: Handle compressing alignment fragments to support compressing debug_frame
  53 // CHECK-ZLIB-STYLE: Contents of section .debug_frame:
  54 // CHECK-ZLIB-STYLE-NOT: ZLIB
  55 // CHECK-ZLIB-STYLE: Contents of
  56
  57 // Check that debug_line section was not renamed, so it is
  58 // zlib-style, not zlib-gnu one. Check that SHF_COMPRESSED was set.
  59 // ZLIB-STYLE-FLAGS:      Section {
  60 // ZLIB-STYLE-FLAGS:        Index:
  61 // ZLIB-STYLE-FLAGS:        Name: .debug_str
  62 // ZLIB-STYLE-FLAGS-NEXT:   Type: SHT_PROGBITS
  63 // ZLIB-STYLE-FLAGS-NEXT:   Flags [
  64 // ZLIB-STYLE-FLAGS-NEXT:     SHF_COMPRESSED
  65 // ZLIB-STYLE-FLAGS-NEXT:     SHF_MERGE
  66 // ZLIB-STYLE-FLAGS-NEXT:     SHF_STRINGS
  67 // ZLIB-STYLE-FLAGS-NEXT:   ]
  68 // ZLIB-STYLE-FLAGS-NEXT:   Address:
  69 // ZLIB-STYLE-FLAGS-NEXT:   Offset:
  70 // ZLIB-STYLE-FLAGS-NEXT:   Size:
  71 // ZLIB-STYLE-FLAGS-NEXT:   Link:
  72 // ZLIB-STYLE-FLAGS-NEXT:   Info:
  73 // ZLIB-STYLE-FLAGS32-NEXT: AddressAlignment: 4
  74 // ZLIB-STYLE-FLAGS64-NEXT: AddressAlignment: 8
  75
  76 // 386-SYMBOLS-ZLIB: Name: .Linfo_string0
  77 // 386-SYMBOLS-ZLIB-NOT: }
  78 // 386-SYMBOLS-ZLIB: Section: .debug_str
  79
  80         .section        .debug_line,"",@progbits
  81
  82         .section        .debug_abbrev,"",@progbits
  83 .Lsection_abbrev:
  84         .byte   1                       # Abbreviation Code
  85         .byte   17                      # DW_TAG_compile_unit
  86         .byte   0                       # DW_CHILDREN_no
  87         .byte   27                      # DW_AT_comp_dir
  88         .byte   14                      # DW_FORM_strp
  89         .byte   0                       # EOM(1)
  90         .byte   0                       # EOM(2)
  91
  92         .section        .debug_info,"",@progbits
  93         .long   12                      # Length of Unit
  94         .short  4                       # DWARF version number
  95         .long   .Lsection_abbrev        # Offset Into Abbrev. Section
  96         .byte   8                       # Address Size (in bytes)
  97         .byte   1                       # Abbrev [1] DW_TAG_compile_unit
  98         .long   .Linfo_string0          # DW_AT_comp_dir
  99
 100         .text
 101 foo:
 102         .cfi_startproc
 103         .file 1 "Driver.ii"
 104 # pad out the line table to make sure it's big enough to warrant compression
 105         .loc 1 2 0
 106         nop
 107         .loc 1 3 0
 108         nop
 109         .loc 1 4 0
 110         nop
 111         .loc 1 5 0
 112         nop
 113         .loc 1 6 0
 114         nop
 115         .loc 1 7 0
 116         nop
 117         .loc 1 8 0
 118         nop
 119         .cfi_endproc
 120         .cfi_sections .debug_frame
 121
 122 # Below is the section we will use to check that after compression with llvm-mc,
 123 # llvm-dwarfdump tool will be able to decompress data back and dump it. Data sample
 124 # should be compressable enough, so it is filled with some amount of equal symbols at the end
 125         .section        .debug_str,"MS",@progbits,1
 126 .Linfo_string0:
 127         .asciz  "perfectly compressable data sample *****************************************"