llvm/test/tools/llvm-dwarfdump/ARM/aligned_line_tables.s

   1 // RUN: llvm-mc %s -defsym ALIGN_4=1 -save-temp-labels -filetype obj -triple arm-none-eabi -o %t.o
   2 // RUN: llvm-nm %t.o | FileCheck %s --check-prefix=L4
   3 // RUN: llvm-dwarfdump -debug-line %t.o 2>&1 | FileCheck %s --implicit-check-not='warning:' --check-prefix=MULT4
   4
   5 // RUN: llvm-mc %s -defsym ALIGN_8=1 -save-temp-labels -filetype obj -triple arm-none-eabi -o %t.o
   6 // RUN: llvm-nm %t.o | FileCheck %s --check-prefix=L8
   7 // RUN: llvm-dwarfdump -debug-line %t.o 2>&1 | FileCheck %s --implicit-check-not='warning:' --check-prefix=MULT8
   8
   9 // RUN: llvm-mc %s -defsym UNALIGNED_PADDING=1 -save-temp-labels -filetype obj -triple arm-none-eabi -o %t.o
  10 // RUN: llvm-nm %t.o | FileCheck %s --check-prefix=LUNALIGN
  11 // RUN: llvm-dwarfdump -debug-line %t.o 2>&1 | FileCheck %s --check-prefix=UNALIGN
  12
  13 /// This test is based on a real example from ARM C/C++ Compiler.
  14 /// It verifies llvm-dwarfdump is able to dump line tables even if they've been
  15 /// placed at aligned offsets.
  16
  17 // L4: 0000002b N .Ltable0_end
  18 // MULT4:      Address            Line   Column File   ISA Discriminator OpIndex Flags
  19 // MULT4-NEXT: ------------------ ------ ------ ------ --- ------------- ------- -------------
  20 // MULT4-NEXT: 0x0000000000000000      1      0      1   0             0       0  is_stmt end_sequence
  21 // MULT4-EMPTY:
  22 // MULT4-NEXT: debug_line[0x0000002c]
  23 // MULT4-NEXT: Line table prologue:
  24 // MULT4-NEXT:    total_length: 0x0000003a{{$}}
  25 // MULT4-NEXT:          format: DWARF32
  26 // MULT4-NEXT:         version: 2{{$}}
  27 // MULT4-NEXT: prologue_length: 0x0000001a
  28 // MULT4-NEXT: min_inst_length: 2
  29 // MULT4-NEXT: default_is_stmt: 1
  30
  31 // L8: 00000027 N .Ltable0_end
  32 // MULT8:      Address            Line   Column File   ISA Discriminator OpIndex Flags
  33 // MULT8-NEXT: ------------------ ------ ------ ------ --- ------------- ------- -------------
  34 // MULT8-NEXT: 0x0000000000000000      1      0      1   0             0       0  is_stmt end_sequence
  35 // MULT8-EMPTY:
  36 // MULT8-NEXT: debug_line[0x00000028]
  37 // MULT8-NEXT: Line table prologue:
  38 // MULT8-NEXT:    total_length: 0x0000003a{{$}}
  39 // MULT8-NEXT:          format: DWARF32
  40 // MULT8-NEXT:         version: 2{{$}}
  41 // MULT8-NEXT: prologue_length: 0x0000001a
  42 // MULT8-NEXT: min_inst_length: 2
  43 // MULT8-NEXT: default_is_stmt: 1
  44
  45 /// This should fail to dump:
  46 // LUNALIGN: 00000027 N .Ltable0_end
  47 // UNALIGN: warning: parsing line table prologue at offset 0x00000027: unsupported version
  48
  49 .section .debug_line
  50 /// First line table
  51 /// Unit total length:
  52 .long .Ltable0_end - .Ltable0_start
  53 .Ltable0_start:
  54 .short 2        /// Version
  55 /// Header length:
  56 .long .Ltable0_header_end - .Ltable0_header_start
  57 .Ltable0_header_start:
  58 .byte 4         /// Min instruction length
  59 .byte 1         /// Max operations per instruction
  60 .byte 0         /// Default is statement
  61 .byte 6         /// Line range
  62 .byte 10        /// Opcode base
  63 .byte 0         /// standard_opcode_lengths[DW_LNS_copy] = 0
  64 .byte 1         /// standard_opcode_lengths[DW_LNS_advance_pc] = 1
  65 .byte 1         /// standard_opcode_lengths[DW_LNS_advance_line] = 1
  66 .byte 1         /// standard_opcode_lengths[DW_LNS_set_file] = 1
  67 .byte 1         /// standard_opcode_lengths[DW_LNS_set_column] = 1
  68 .byte 0         /// standard_opcode_lengths[DW_LNS_negate_stmt] = 0
  69 .byte 0         /// standard_opcode_lengths[DW_LNS_set_basic_block] = 0
  70 .byte 0         /// standard_opcode_lengths[DW_LNS_const_add_pc] = 0
  71 .byte 0         /// standard_opcode_lengths[DW_LNS_fixed_advance_pc] = 0
  72 .byte 0         /// No include directories
  73 /// File name:
  74 .ifdef ALIGN_4
  75 /// Pad out filename so next 4 byte aligned offset is a multiple of 4 and not 8.
  76 .asciz "foobar.cpp"
  77 .else
  78 .asciz "test.c"
  79 .endif
  80 .byte 0         /// Dir idx
  81 .byte 0         /// Mod time
  82 .byte 0         /// Length
  83 .byte 0         /// End files
  84 .Ltable0_header_end:
  85 /// Line table operations
  86 .byte 0         /// Extended opcode
  87 .byte 1         /// Length 1
  88 .byte 1         /// DW_LNE_end_sequence
  89 .Ltable0_end:
  90 /// End first line table
  91 /// Padding:
  92 .ifdef UNALIGNED_PADDING
  93 .short 0
  94 .else
  95 .byte 0
  96 .endif
  97 /// Second line table
  98 /// Unit total length:
  99 .long .Ltable1_end - .Ltable1_start
 100 .Ltable1_start:
 101 .short 2        /// Version
 102 /// Header length:
 103 .long .Ltable1_header_end - .Ltable1_header_start
 104 .Ltable1_header_start:
 105 .byte 2         /// Min instruction length
 106 .byte 1         /// Max operations per instruction
 107 .byte 0         /// Default is statement
 108 .byte 6         /// Line range
 109 .byte 10        /// Opcode base
 110 .byte 0         /// standard_opcode_lengths[DW_LNS_copy] = 0
 111 .byte 1         /// standard_opcode_lengths[DW_LNS_advance_pc] = 1
 112 .byte 1         /// standard_opcode_lengths[DW_LNS_advance_line] = 1
 113 .byte 1         /// standard_opcode_lengths[DW_LNS_set_file] = 1
 114 .byte 1         /// standard_opcode_lengths[DW_LNS_set_column] = 1
 115 .byte 0         /// standard_opcode_lengths[DW_LNS_negate_stmt] = 0
 116 .byte 0         /// standard_opcode_lengths[DW_LNS_set_basic_block] = 0
 117 .byte 0         /// standard_opcode_lengths[DW_LNS_const_add_pc] = 0
 118 .byte 0         /// standard_opcode_lengths[DW_LNS_fixed_advance_pc] = 0
 119 .byte 0         /// No include directories
 120 .asciz "test.c" /// File name
 121 .byte 0         /// Dir idx
 122 .byte 0         /// Mod time
 123 .byte 0         /// Length
 124 .byte 0         /// End files
 125 .Ltable1_header_end:
 126 /// Line table operations
 127 .byte 4         /// DW_LNS_set_file
 128 .byte 1         /// File 1
 129 .byte 5         /// DW_LNS_set_column
 130 .byte 1         /// Column 1
 131 .byte 0         /// Extended opcode
 132 .byte 5         /// Length 5
 133 .byte 2         /// DW_LNE_set_address
 134 .long 32896     /// Address = 0x00008080
 135 .byte 3         /// DW_LNS_advance_line
 136 .byte 6         /// Line += 6
 137 .byte 1         /// DW_LNS_copy
 138 .byte 5         /// DW_LNS_set_column
 139 .byte 2         /// Column 2
 140 .byte 12        /// Special opcode (address += 0,  line += 2)
 141 .byte 30        /// Special opcode (address += 6,  line += 2)
 142 .byte 5         /// DW_LNS_set_column
 143 .byte 1         /// Column 1
 144 .byte 17        /// Special opcode (address += 2,  line += 1)
 145 .byte 2         /// DW_LNS_advance_pc
 146 .byte 4         /// += (4 * min instruction length)
 147 .byte 0         /// Extended opcode
 148 .byte 1         /// Length 1
 149 .byte 1         /// DW_LNE_end_sequence
 150 .Ltable1_end:
 151 /// End second line table
 152 .short 0        /// Padding (to make section a word multiple)