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