gdb/testsuite/gdb.dwarf2/fission-reread.S

   1 /* Copyright 2012 Free Software Foundation, Inc.
   2
   3    This program is free software; you can redistribute it and/or modify
   4    it under the terms of the GNU General Public License as published by
   5    the Free Software Foundation; either version 3 of the License, or
   6    (at your option) any later version.
   7
   8    This program is distributed in the hope that it will be useful,
   9    but WITHOUT ANY WARRANTY; without even the implied warranty of
  10    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  11    GNU General Public License for more details.
  12
  13    You should have received a copy of the GNU General Public License
  14    along with this program.  If not, see <http://www.gnu.org/licenses/>.  */
  15
  16 /* Testcase to exercise the code path in bug 13961 for Fission.
  17    http://gcc.gnu.org/wiki/DebugFission
  18
  19    Compiled from:
  20
  21    class foo
  22    {
  23     public:
  24      int bar;
  25    };
  26
  27    foo baz;
  28
  29    int
  30    main ()
  31    {
  32      return 0;
  33    }
  34
  35    And then manually edited to insert the necessary DW_AT_specification
  36    entries to trigger the desired code path.
  37    There's no real need to make this architecture-specific, so it has been
  38    further hand-edited to support that.
  39 */
  40
  41         .file   "fission-reread.cc"
  42
  43         .globl  baz
  44         .bss
  45         .align 4
  46         .type   baz, @object
  47         .size   baz, 4
  48 baz:
  49         .zero   4
  50
  51         .text
  52 .Ltext0:
  53         .globl  main
  54         .type   main, @function
  55 main:
  56 .LFB0:
  57         .file 1 "fission-reread.cc"
  58         .loc 1 11 0
  59         .4byte 0
  60 .LFE0:
  61         .size   main, .-main
  62 .Letext0:
  63
  64         .section        .debug_types.dwo,"G",@progbits,wt.198b7eaccef12290,comdat
  65 .Ltu_start_dwo:
  66         .4byte  .Ltu_end_dwo - .Ltu_start_dwo - 4       # Length of Compilation Unit Info
  67         .2byte  0x4     # DWARF version number
  68         .4byte  .Ldebug_abbrev0 # Offset Into Abbrev. Section
  69         .byte   0x8     # Pointer Size (in bytes)
  70         .byte   0x19    # Type Signature
  71         .byte   0x8b
  72         .byte   0x7e
  73         .byte   0xac
  74         .byte   0xce
  75         .byte   0xf1
  76         .byte   0x22
  77         .byte   0x90
  78         .4byte  .Ltu_class_type - .Ltu_start_dwo        # Offset to Type DIE
  79         .uleb128 0x1    # (DIE (0x17) DW_TAG_type_unit)
  80         .byte   0x4     # DW_AT_language
  81         .byte   0x73    # DW_AT_GNU_odr_signature
  82         .byte   0xea
  83         .byte   0x85
  84         .byte   0x23
  85         .byte   0x75
  86         .byte   0x8a
  87         .byte   0x7e
  88         .byte   0x87
  89         .4byte  .Lskeleton_debug_line0  # DW_AT_stmt_list
  90
  91         /* Manually inserted to have a DW_AT_specification refering to
  92            something and appearing ahead of it.  */
  93         .uleb128 0x8    /* DW_TAG_class_type */
  94         .4byte .Ltu_class_type - .Ltu_start_dwo
  95         /* End of manual insertion */
  96
  97 .Ltu_class_type:
  98         .uleb128 0x2    # (DIE (0x25) DW_TAG_class_type)
  99         .ascii "foo\0"  # DW_AT_name
 100         .byte   0x4     # DW_AT_byte_size
 101         .byte   0x1     # DW_AT_decl_file (fission-reread.cc)
 102         .byte   0x1     # DW_AT_decl_line
 103         .4byte  .Ltu_int        # DW_AT_sibling
 104         .uleb128 0x3    # (DIE (0x31) DW_TAG_member)
 105         .ascii "bar\0"  # DW_AT_name
 106         .byte   0x1     # DW_AT_decl_file (fission-reread.cc)
 107         .byte   0x4     # DW_AT_decl_line
 108         .4byte  .Ltu_int        # DW_AT_type
 109         .byte   0       # DW_AT_data_member_location
 110         .byte   0x1     # DW_AT_accessibility
 111         .byte   0       # end of children of DIE 0x25
 112 .Ltu_int:
 113         .uleb128 0x4    # (DIE (0x3f) DW_TAG_base_type)
 114         .byte   0x4     # DW_AT_byte_size
 115         .byte   0x5     # DW_AT_encoding
 116         .ascii "int\0"  # DW_AT_name
 117         .byte   0       # end of children of DIE 0x17
 118 .Ltu_end_dwo:
 119
 120         .section        .debug_types,"G",@progbits,wt.198b7eaccef12290,comdat
 121 .Ltu_start:
 122         .4byte  .Ltu_end - .Ltu_start - 4       # Length of Type Unit Info
 123         .2byte  0x4     # DWARF version number
 124         .4byte  .Lskeleton_debug_abbrev0        # Offset Into Abbrev. Section
 125         .byte   0x8     # Pointer Size (in bytes)
 126         .byte   0x19    # Type Signature
 127         .byte   0x8b
 128         .byte   0x7e
 129         .byte   0xac
 130         .byte   0xce
 131         .byte   0xf1
 132         .byte   0x22
 133         .byte   0x90
 134         .4byte  0       # Offset to Type DIE
 135         .uleb128 0x2    # (DIE (0) DW_TAG_type_unit)
 136         .ascii "/tmp/src/gdb/testsuite/gdb.dwarf2\0"    # DW_AT_comp_dir
 137         # Normally dwo_name would be "fission-reread.dwo".
 138         # Simplification: Leave the DWO contents in the executable.
 139         .ascii "fission-reread\0"       # DW_AT_GNU_dwo_name
 140         .4byte  .Ldebug_pubnames0       # DW_AT_GNU_pubnames
 141         .4byte  .Ldebug_pubtypes0       # DW_AT_GNU_pubtypes
 142         .4byte  .Ldebug_addr0   # DW_AT_GNU_addr_base
 143 .Ltu_end:
 144
 145         .section        .debug_info.dwo,"",@progbits
 146 .Lcu_start_dwo:
 147         .4byte  .Lcu_end_dwo - .Lcu_start_dwo - 4       # Length of Compilation Unit Info
 148         .2byte  0x4     # DWARF version number
 149         .4byte  .Ldebug_abbrev0 # Offset Into Abbrev. Section
 150         .byte   0x8     # Pointer Size (in bytes)
 151         .uleb128 0x5    # (DIE (0xb) DW_TAG_compile_unit)
 152         .ascii "GNU C++ 4.6.x-fission\0"        # DW_AT_producer
 153         .byte   0x4     # DW_AT_language
 154         .ascii "fission-reread.cc\0"    # DW_AT_name
 155         .ascii "/tmp/src/gdb/testsuite/gdb.dwarf2\0"    # DW_AT_comp_dir
 156         .byte   0       # DW_AT_GNU_dwo_id
 157         .byte   0
 158         .byte   0
 159         .byte   0
 160         .byte   0
 161         .byte   0
 162         .byte   0
 163         .byte   0
 164 .Lcu_int:
 165         .uleb128 0x4    # (DIE (0x7f) DW_TAG_base_type)
 166         .byte   0x4     # DW_AT_byte_size
 167         .byte   0x5     # DW_AT_encoding
 168         .ascii "int\0"  # DW_AT_name
 169         .uleb128 0x6    # (DIE (0x86) DW_TAG_subprogram)
 170                         # DW_AT_external
 171         .ascii "main\0" # DW_AT_name
 172         .byte   0x1     # DW_AT_decl_file (fission-reread.cc)
 173         .byte   0xa     # DW_AT_decl_line
 174         .4byte  .Lcu_int        # DW_AT_type
 175         .uleb128 0      # DW_AT_low_pc
 176         .8byte  .LFE0-.LFB0     # DW_AT_high_pc
 177         .uleb128 0x1    # DW_AT_frame_base
 178         .byte   0x9c    # DW_OP_call_frame_cfa
 179         .uleb128 0x7    # (DIE (0x9d) DW_TAG_variable)
 180         .ascii "baz\0"  # DW_AT_name
 181         .byte   0x1     # DW_AT_decl_file (fission-reread.cc)
 182         .byte   0x7     # DW_AT_decl_line
 183         .byte   0x19    # DW_AT_type
 184         .byte   0x8b
 185         .byte   0x7e
 186         .byte   0xac
 187         .byte   0xce
 188         .byte   0xf1
 189         .byte   0x22
 190         .byte   0x90
 191                         # DW_AT_external
 192         .uleb128 0x2    # DW_AT_location
 193         .byte   0xfb    # DW_OP_GNU_addr_index
 194         .uleb128 0x1    # (index into .debug_addr)
 195         .byte   0       # end of children of DIE 0xb
 196 .Lcu_end_dwo:
 197
 198         .section        .debug_info,"",@progbits
 199 .Lskeleton_debug_info0:
 200 .Lcu_start:
 201         .4byte  .Lcu_end - .Lcu_start - 4       # Length of Compilation Unit Info
 202         .2byte  0x4     # DWARF version number
 203         .4byte  .Lskeleton_debug_abbrev0        # Offset Into Abbrev. Section
 204         .byte   0x8     # Pointer Size (in bytes)
 205         .uleb128 0x1    # (DIE (0) DW_TAG_compile_unit)
 206         .8byte  .Ltext0 # DW_AT_low_pc
 207         .8byte  .Letext0-.Ltext0        # DW_AT_high_pc
 208         .4byte  .Ldebug_line0   # DW_AT_stmt_list
 209         .ascii "/tmp/src/gdb/testsuite/gdb.dwarf2\0"    # DW_AT_comp_dir
 210         # Normally dwo_name would be "fission-reread.dwo".
 211         # Simplification: Leave the DWO contents in the executable.
 212         .ascii "fission-reread\0"       # DW_AT_GNU_dwo_name
 213         .4byte  .Ldebug_pubnames0       # DW_AT_GNU_pubnames
 214         .4byte  .Ldebug_pubtypes0       # DW_AT_GNU_pubtypes
 215         .4byte  .Ldebug_addr0   # DW_AT_GNU_addr_base
 216         .byte   0       # DW_AT_GNU_dwo_id
 217         .byte   0
 218         .byte   0
 219         .byte   0
 220         .byte   0
 221         .byte   0
 222         .byte   0
 223         .byte   0
 224 .Lcu_end:
 225
 226         .section        .debug_abbrev,"",@progbits
 227 .Lskeleton_debug_abbrev0:
 228         .uleb128 0x1    # (abbrev code)
 229         .uleb128 0x11   # (TAG: DW_TAG_compile_unit)
 230         .byte   0       # DW_children_no
 231         .uleb128 0x11   # (DW_AT_low_pc)
 232         .uleb128 0x1    # (DW_FORM_addr)
 233         .uleb128 0x12   # (DW_AT_high_pc)
 234         .uleb128 0x7    # (DW_FORM_data8)
 235         .uleb128 0x10   # (DW_AT_stmt_list)
 236         .uleb128 0x17   # (DW_FORM_sec_offset)
 237         .uleb128 0x1b   # (DW_AT_comp_dir)
 238         .uleb128 0x8    # (DW_FORM_string)
 239         .uleb128 0x2130 # (DW_AT_GNU_dwo_name)
 240         .uleb128 0x8    # (DW_FORM_string)
 241         .uleb128 0x2134 # (DW_AT_GNU_pubnames)
 242         .uleb128 0x17   # (DW_FORM_sec_offset)
 243         .uleb128 0x2135 # (DW_AT_GNU_pubtypes)
 244         .uleb128 0x17   # (DW_FORM_sec_offset)
 245         .uleb128 0x2133 # (DW_AT_GNU_addr_base)
 246         .uleb128 0x17   # (DW_FORM_sec_offset)
 247         .uleb128 0x2131 # (DW_AT_GNU_dwo_id)
 248         .uleb128 0x7    # (DW_FORM_data8)
 249         .byte   0
 250         .byte   0
 251         .uleb128 0x2    # (abbrev code)
 252         .uleb128 0x41   # (TAG: DW_TAG_type_unit)
 253         .byte   0       # DW_children_no
 254         .uleb128 0x1b   # (DW_AT_comp_dir)
 255         .uleb128 0x8    # (DW_FORM_string)
 256         .uleb128 0x2130 # (DW_AT_GNU_dwo_name)
 257         .uleb128 0x8    # (DW_FORM_string)
 258         .uleb128 0x2134 # (DW_AT_GNU_pubnames)
 259         .uleb128 0x17   # (DW_FORM_sec_offset)
 260         .uleb128 0x2135 # (DW_AT_GNU_pubtypes)
 261         .uleb128 0x17   # (DW_FORM_sec_offset)
 262         .uleb128 0x2133 # (DW_AT_GNU_addr_base)
 263         .uleb128 0x17   # (DW_FORM_sec_offset)
 264         .byte   0
 265         .byte   0
 266         .byte   0       # end of skeleton .debug_abbrev
 267         .section        .debug_abbrev.dwo,"",@progbits
 268 .Ldebug_abbrev0:
 269         .uleb128 0x1    # (abbrev code)
 270         .uleb128 0x41   # (TAG: DW_TAG_type_unit)
 271         .byte   0x1     # DW_children_yes
 272         .uleb128 0x13   # (DW_AT_language)
 273         .uleb128 0xb    # (DW_FORM_data1)
 274         .uleb128 0x210f # (DW_AT_GNU_odr_signature)
 275         .uleb128 0x7    # (DW_FORM_data8)
 276         .uleb128 0x10   # (DW_AT_stmt_list)
 277         .uleb128 0x17   # (DW_FORM_sec_offset)
 278         .byte   0
 279         .byte   0
 280         .uleb128 0x2    # (abbrev code)
 281         .uleb128 0x2    # (TAG: DW_TAG_class_type)
 282         .byte   0x1     # DW_children_yes
 283         .uleb128 0x3    # (DW_AT_name)
 284         .uleb128 0x8    # (DW_FORM_string)
 285         .uleb128 0xb    # (DW_AT_byte_size)
 286         .uleb128 0xb    # (DW_FORM_data1)
 287         .uleb128 0x3a   # (DW_AT_decl_file)
 288         .uleb128 0xb    # (DW_FORM_data1)
 289         .uleb128 0x3b   # (DW_AT_decl_line)
 290         .uleb128 0xb    # (DW_FORM_data1)
 291         .uleb128 0x1    # (DW_AT_sibling)
 292         .uleb128 0x13   # (DW_FORM_ref4)
 293         .byte   0
 294         .byte   0
 295         .uleb128 0x3    # (abbrev code)
 296         .uleb128 0xd    # (TAG: DW_TAG_member)
 297         .byte   0       # DW_children_no
 298         .uleb128 0x3    # (DW_AT_name)
 299         .uleb128 0x8    # (DW_FORM_string)
 300         .uleb128 0x3a   # (DW_AT_decl_file)
 301         .uleb128 0xb    # (DW_FORM_data1)
 302         .uleb128 0x3b   # (DW_AT_decl_line)
 303         .uleb128 0xb    # (DW_FORM_data1)
 304         .uleb128 0x49   # (DW_AT_type)
 305         .uleb128 0x13   # (DW_FORM_ref4)
 306         .uleb128 0x38   # (DW_AT_data_member_location)
 307         .uleb128 0xb    # (DW_FORM_data1)
 308         .uleb128 0x32   # (DW_AT_accessibility)
 309         .uleb128 0xb    # (DW_FORM_data1)
 310         .byte   0
 311         .byte   0
 312         .uleb128 0x4    # (abbrev code)
 313         .uleb128 0x24   # (TAG: DW_TAG_base_type)
 314         .byte   0       # DW_children_no
 315         .uleb128 0xb    # (DW_AT_byte_size)
 316         .uleb128 0xb    # (DW_FORM_data1)
 317         .uleb128 0x3e   # (DW_AT_encoding)
 318         .uleb128 0xb    # (DW_FORM_data1)
 319         .uleb128 0x3    # (DW_AT_name)
 320         .uleb128 0x8    # (DW_FORM_string)
 321         .byte   0
 322         .byte   0
 323         .uleb128 0x5    # (abbrev code)
 324         .uleb128 0x11   # (TAG: DW_TAG_compile_unit)
 325         .byte   0x1     # DW_children_yes
 326         .uleb128 0x25   # (DW_AT_producer)
 327         .uleb128 0x8    # (DW_FORM_string)
 328         .uleb128 0x13   # (DW_AT_language)
 329         .uleb128 0xb    # (DW_FORM_data1)
 330         .uleb128 0x3    # (DW_AT_name)
 331         .uleb128 0x8    # (DW_FORM_string)
 332         .uleb128 0x1b   # (DW_AT_comp_dir)
 333         .uleb128 0x8    # (DW_FORM_string)
 334         .uleb128 0x2131 # (DW_AT_GNU_dwo_id)
 335         .uleb128 0x7    # (DW_FORM_data8)
 336         .byte   0
 337         .byte   0
 338         .uleb128 0x6    # (abbrev code)
 339         .uleb128 0x2e   # (TAG: DW_TAG_subprogram)
 340         .byte   0       # DW_children_no
 341         .uleb128 0x3f   # (DW_AT_external)
 342         .uleb128 0x19   # (DW_FORM_flag_present)
 343         .uleb128 0x3    # (DW_AT_name)
 344         .uleb128 0x8    # (DW_FORM_string)
 345         .uleb128 0x3a   # (DW_AT_decl_file)
 346         .uleb128 0xb    # (DW_FORM_data1)
 347         .uleb128 0x3b   # (DW_AT_decl_line)
 348         .uleb128 0xb    # (DW_FORM_data1)
 349         .uleb128 0x49   # (DW_AT_type)
 350         .uleb128 0x13   # (DW_FORM_ref4)
 351         .uleb128 0x11   # (DW_AT_low_pc)
 352         .uleb128 0x1f01 # (DW_FORM_GNU_addr_index)
 353         .uleb128 0x12   # (DW_AT_high_pc)
 354         .uleb128 0x7    # (DW_FORM_data8)
 355         .uleb128 0x40   # (DW_AT_frame_base)
 356         .uleb128 0x18   # (DW_FORM_exprloc)
 357         .byte   0
 358         .byte   0
 359         .uleb128 0x7    # (abbrev code)
 360         .uleb128 0x34   # (TAG: DW_TAG_variable)
 361         .byte   0       # DW_children_no
 362         .uleb128 0x3    # (DW_AT_name)
 363         .uleb128 0x8    # (DW_FORM_string)
 364         .uleb128 0x3a   # (DW_AT_decl_file)
 365         .uleb128 0xb    # (DW_FORM_data1)
 366         .uleb128 0x3b   # (DW_AT_decl_line)
 367         .uleb128 0xb    # (DW_FORM_data1)
 368         .uleb128 0x49   # (DW_AT_type)
 369         .uleb128 0x20   # (DW_FORM_ref_sig8)
 370         .uleb128 0x3f   # (DW_AT_external)
 371         .uleb128 0x19   # (DW_FORM_flag_present)
 372         .uleb128 0x2    # (DW_AT_location)
 373         .uleb128 0x18   # (DW_FORM_exprloc)
 374         .byte   0
 375         .byte   0
 376
 377         /* Manually inserted.  */
 378         .uleb128 0x8            /* abbrev code */
 379         .uleb128 0x2            /* DW_TAG_class_type */
 380         .byte   0x0             /* DW_has_children_no */
 381         .uleb128 0x47           /* DW_AT_specification */
 382         .uleb128 0x13           /* DW_FORM_ref4 */
 383         .byte   0x0             /* Terminator */
 384         .byte   0x0             /* Terminator */
 385         /* End of manual insertion.  */
 386
 387         .byte   0
 388         .section        .debug_pubnames,"",@progbits
 389 .Ldebug_pubnames0:
 390         .4byte  0x1f    # Length of Public Names Info
 391         .2byte  0x2     # DWARF Version
 392         .4byte  .Lskeleton_debug_info0  # Offset of Compilation Unit Info
 393         .4byte  0xb0    # Compilation Unit Length
 394         .4byte  0x86    # DIE offset
 395         .ascii "main\0" # external name
 396         .4byte  0x9d    # DIE offset
 397         .ascii "baz\0"  # external name
 398         .4byte  0
 399         .section        .debug_pubtypes,"",@progbits
 400 .Ldebug_pubtypes0:
 401         .4byte  0x1e    # Length of Public Type Names Info
 402         .2byte  0x2     # DWARF Version
 403         .4byte  .Lskeleton_debug_info0  # Offset of Compilation Unit Info
 404         .4byte  0xb0    # Compilation Unit Length
 405         .4byte  0x7f    # DIE offset
 406         .ascii "int\0"  # external name
 407         .4byte  0x25    # DIE offset
 408         .ascii "foo\0"  # external name
 409         .4byte  0
 410         .section        .debug_aranges,"",@progbits
 411         .4byte  0x2c    # Length of Address Ranges Info
 412         .2byte  0x2     # DWARF Version
 413         .4byte  .Lskeleton_debug_info0  # Offset of Compilation Unit Info
 414         .byte   0x8     # Size of Address
 415         .byte   0       # Size of Segment Descriptor
 416         .2byte  0       # Pad to 16 byte boundary
 417         .2byte  0
 418         .8byte  .Ltext0 # Address
 419         .8byte  .Letext0-.Ltext0        # Length
 420         .8byte  0
 421         .8byte  0
 422         .section        .debug_line,"",@progbits
 423 .Ldebug_line0:
 424         .section        .debug_line.dwo,"",@progbits
 425 .Lskeleton_debug_line0:
 426         .4byte  .LELT0-.LSLT0   # Length of Source Line Info
 427 .LSLT0:
 428         .2byte  0x4     # DWARF Version
 429         .4byte  .LELTP0-.LASLTP0        # Prolog Length
 430 .LASLTP0:
 431         .byte   0x1     # Minimum Instruction Length
 432         .byte   0x1     # Maximum Operations Per Instruction
 433         .byte   0x1     # Default is_stmt_start flag
 434         .byte   0xf6    # Line Base Value (Special Opcodes)
 435         .byte   0xf5    # Line Range Value (Special Opcodes)
 436         .byte   0xa     # Special Opcode Base
 437         .byte   0       # opcode: 0x1 has 0 args
 438         .byte   0x1     # opcode: 0x2 has 1 args
 439         .byte   0x1     # opcode: 0x3 has 1 args
 440         .byte   0x1     # opcode: 0x4 has 1 args
 441         .byte   0x1     # opcode: 0x5 has 1 args
 442         .byte   0       # opcode: 0x6 has 0 args
 443         .byte   0       # opcode: 0x7 has 0 args
 444         .byte   0       # opcode: 0x8 has 0 args
 445         .byte   0x1     # opcode: 0x9 has 1 args
 446         .byte   0       # End directory table
 447         .ascii "fission-reread.cc\0"    # File Entry: 0x1
 448         .uleb128 0
 449         .uleb128 0
 450         .uleb128 0
 451         .byte   0       # End file name table
 452 .LELTP0:
 453 .LELT0:
 454         .section        .debug_addr,"",@progbits
 455 .Ldebug_addr0:
 456         .8byte  .LFB0   # DW_AT_low_pc
 457         .8byte  baz     # DW_AT_location
 458
 459         .section        .note.GNU-stack,"",@progbits