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

   1 /* Copyright 2012-2015 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         .data   /* Previously this used .bss, but it's not portable.  */
  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
  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   0x4     /* 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 - .Ltu_start_dwo /* 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 - .Ltu_start_dwo /* 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
 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   0x4     /* 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\0"       /* DW_AT_comp_dir */
 137         .ascii "fission-reread.dwo\0" /* DW_AT_GNU_dwo_name */
 138         .4byte  .Ldebug_pubnames0       /* DW_AT_GNU_pubnames */
 139         .4byte  .Ldebug_pubtypes0       /* DW_AT_GNU_pubtypes */
 140         .4byte  .Ldebug_addr0   /* DW_AT_GNU_addr_base */
 141 .Ltu_end:
 142
 143         .section        .debug_info.dwo
 144 .Lcu_start_dwo:
 145         .4byte  .Lcu_end_dwo - .Lcu_start_dwo - 4       /* Length of Compilation Unit Info */
 146         .2byte  0x4     /* DWARF version number */
 147         .4byte  .Ldebug_abbrev0 /* Offset Into Abbrev. Section */
 148         .byte   0x4     /* Pointer Size (in bytes) */
 149         .uleb128 0x5    /* (DIE (0xb) DW_TAG_compile_unit) */
 150         .ascii "GNU C++ 4.6.x-fission\0"        /* DW_AT_producer */
 151         .byte   0x4     /* DW_AT_language */
 152         .ascii "gdb.dwarf2/fission-reread.cc\0" /* DW_AT_name */
 153         .ascii "/tmp/src/gdb/testsuite\0"       /* DW_AT_comp_dir */
 154         .byte   1       /* DW_AT_GNU_dwo_id */
 155         .byte   2
 156         .byte   3
 157         .byte   4
 158         .byte   5
 159         .byte   6
 160         .byte   7
 161         .byte   8
 162 .Lcu_int:
 163         .uleb128 0x4    /* (DIE (0x7f) DW_TAG_base_type) */
 164         .byte   0x4     /* DW_AT_byte_size */
 165         .byte   0x5     /* DW_AT_encoding */
 166         .ascii "int\0"  /* DW_AT_name */
 167         .uleb128 0x6    /* (DIE (0x86) DW_TAG_subprogram) */
 168                         /* DW_AT_external */
 169         .ascii "main\0" /* DW_AT_name */
 170         .byte   0x1     /* DW_AT_decl_file (fission-reread.cc) */
 171         .byte   0xa     /* DW_AT_decl_line */
 172         .4byte  .Lcu_int - .Lcu_start_dwo /* DW_AT_type */
 173         .uleb128 0      /* DW_AT_low_pc */
 174         .4byte  .LFE0-.LFB0     /* DW_AT_high_pc */
 175         .uleb128 0x1    /* DW_AT_frame_base */
 176         .byte   0x9c    /* DW_OP_call_frame_cfa */
 177         .uleb128 0x7    /* (DIE (0x9d) DW_TAG_variable) */
 178         .ascii "baz\0"  /* DW_AT_name */
 179         .byte   0x1     /* DW_AT_decl_file (fission-reread.cc) */
 180         .byte   0x7     /* DW_AT_decl_line */
 181         .byte   0x19    /* DW_AT_type */
 182         .byte   0x8b
 183         .byte   0x7e
 184         .byte   0xac
 185         .byte   0xce
 186         .byte   0xf1
 187         .byte   0x22
 188         .byte   0x90
 189                         /* DW_AT_external */
 190         .uleb128 0x2    /* DW_AT_location */
 191         .byte   0xfb    /* DW_OP_GNU_addr_index */
 192         .uleb128 0x1    /* (index into .debug_addr) */
 193         .byte   0       /* end of children of DIE 0xb */
 194 .Lcu_end_dwo:
 195
 196         .section        .debug_info
 197 .Lskeleton_debug_info0:
 198 .Lcu_start:
 199         .4byte  .Lcu_end - .Lcu_start - 4       /* Length of Compilation Unit Info */
 200         .2byte  0x4     /* DWARF version number */
 201         .4byte  .Lskeleton_debug_abbrev0        /* Offset Into Abbrev. Section */
 202         .byte   0x4     /* Pointer Size (in bytes) */
 203         .uleb128 0x1    /* (DIE (0) DW_TAG_compile_unit) */
 204         .4byte  .Ltext0 /* DW_AT_low_pc */
 205         .4byte  .Letext0-.Ltext0        /* DW_AT_high_pc */
 206         .4byte  .Ldebug_line0   /* DW_AT_stmt_list */
 207         .ascii "/tmp/src/gdb/testsuite\0"       /* DW_AT_comp_dir */
 208         .ascii "fission-reread.dwo\0" /* DW_AT_GNU_dwo_name */
 209         .4byte  .Ldebug_pubnames0       /* DW_AT_GNU_pubnames */
 210         .4byte  .Ldebug_pubtypes0       /* DW_AT_GNU_pubtypes */
 211         .4byte  .Ldebug_addr0   /* DW_AT_GNU_addr_base */
 212         .byte   1       /* DW_AT_GNU_dwo_id */
 213         .byte   2
 214         .byte   3
 215         .byte   4
 216         .byte   5
 217         .byte   6
 218         .byte   7
 219         .byte   8
 220 .Lcu_end:
 221
 222         .section        .debug_abbrev
 223 .Lskeleton_debug_abbrev0:
 224         .uleb128 0x1    /* (abbrev code) */
 225         .uleb128 0x11   /* (TAG: DW_TAG_compile_unit) */
 226         .byte   0       /* DW_children_no */
 227         .uleb128 0x11   /* (DW_AT_low_pc) */
 228         .uleb128 0x1    /* (DW_FORM_addr) */
 229         .uleb128 0x12   /* (DW_AT_high_pc) */
 230         .uleb128 0x6    /* (DW_FORM_data4) */
 231         .uleb128 0x10   /* (DW_AT_stmt_list) */
 232         .uleb128 0x17   /* (DW_FORM_sec_offset) */
 233         .uleb128 0x1b   /* (DW_AT_comp_dir) */
 234         .uleb128 0x8    /* (DW_FORM_string) */
 235         .uleb128 0x2130 /* (DW_AT_GNU_dwo_name) */
 236         .uleb128 0x8    /* (DW_FORM_string) */
 237         .uleb128 0x2134 /* (DW_AT_GNU_pubnames) */
 238         .uleb128 0x17   /* (DW_FORM_sec_offset) */
 239         .uleb128 0x2135 /* (DW_AT_GNU_pubtypes) */
 240         .uleb128 0x17   /* (DW_FORM_sec_offset) */
 241         .uleb128 0x2133 /* (DW_AT_GNU_addr_base) */
 242         .uleb128 0x17   /* (DW_FORM_sec_offset) */
 243         .uleb128 0x2131 /* (DW_AT_GNU_dwo_id) */
 244         .uleb128 0x7    /* (DW_FORM_data8) */
 245         .byte   0
 246         .byte   0
 247         .uleb128 0x2    /* (abbrev code) */
 248         .uleb128 0x41   /* (TAG: DW_TAG_type_unit) */
 249         .byte   0       /* DW_children_no */
 250         .uleb128 0x1b   /* (DW_AT_comp_dir) */
 251         .uleb128 0x8    /* (DW_FORM_string) */
 252         .uleb128 0x2130 /* (DW_AT_GNU_dwo_name) */
 253         .uleb128 0x8    /* (DW_FORM_string) */
 254         .uleb128 0x2134 /* (DW_AT_GNU_pubnames) */
 255         .uleb128 0x17   /* (DW_FORM_sec_offset) */
 256         .uleb128 0x2135 /* (DW_AT_GNU_pubtypes) */
 257         .uleb128 0x17   /* (DW_FORM_sec_offset) */
 258         .uleb128 0x2133 /* (DW_AT_GNU_addr_base) */
 259         .uleb128 0x17   /* (DW_FORM_sec_offset) */
 260         .byte   0
 261         .byte   0
 262         .byte   0       /* end of skeleton .debug_abbrev */
 263         .section        .debug_abbrev.dwo
 264 .Ldebug_abbrev0:
 265         .uleb128 0x1    /* (abbrev code) */
 266         .uleb128 0x41   /* (TAG: DW_TAG_type_unit) */
 267         .byte   0x1     /* DW_children_yes */
 268         .uleb128 0x13   /* (DW_AT_language) */
 269         .uleb128 0xb    /* (DW_FORM_data1) */
 270         .uleb128 0x210f /* (DW_AT_GNU_odr_signature) */
 271         .uleb128 0x7    /* (DW_FORM_data8) */
 272         .uleb128 0x10   /* (DW_AT_stmt_list) */
 273         .uleb128 0x17   /* (DW_FORM_sec_offset) */
 274         .byte   0
 275         .byte   0
 276         .uleb128 0x2    /* (abbrev code) */
 277         .uleb128 0x2    /* (TAG: DW_TAG_class_type) */
 278         .byte   0x1     /* DW_children_yes */
 279         .uleb128 0x3    /* (DW_AT_name) */
 280         .uleb128 0x8    /* (DW_FORM_string) */
 281         .uleb128 0xb    /* (DW_AT_byte_size) */
 282         .uleb128 0xb    /* (DW_FORM_data1) */
 283         .uleb128 0x3a   /* (DW_AT_decl_file) */
 284         .uleb128 0xb    /* (DW_FORM_data1) */
 285         .uleb128 0x3b   /* (DW_AT_decl_line) */
 286         .uleb128 0xb    /* (DW_FORM_data1) */
 287         .uleb128 0x1    /* (DW_AT_sibling) */
 288         .uleb128 0x13   /* (DW_FORM_ref4) */
 289         .byte   0
 290         .byte   0
 291         .uleb128 0x3    /* (abbrev code) */
 292         .uleb128 0xd    /* (TAG: DW_TAG_member) */
 293         .byte   0       /* DW_children_no */
 294         .uleb128 0x3    /* (DW_AT_name) */
 295         .uleb128 0x8    /* (DW_FORM_string) */
 296         .uleb128 0x3a   /* (DW_AT_decl_file) */
 297         .uleb128 0xb    /* (DW_FORM_data1) */
 298         .uleb128 0x3b   /* (DW_AT_decl_line) */
 299         .uleb128 0xb    /* (DW_FORM_data1) */
 300         .uleb128 0x49   /* (DW_AT_type) */
 301         .uleb128 0x13   /* (DW_FORM_ref4) */
 302         .uleb128 0x38   /* (DW_AT_data_member_location) */
 303         .uleb128 0xb    /* (DW_FORM_data1) */
 304         .uleb128 0x32   /* (DW_AT_accessibility) */
 305         .uleb128 0xb    /* (DW_FORM_data1) */
 306         .byte   0
 307         .byte   0
 308         .uleb128 0x4    /* (abbrev code) */
 309         .uleb128 0x24   /* (TAG: DW_TAG_base_type) */
 310         .byte   0       /* DW_children_no */
 311         .uleb128 0xb    /* (DW_AT_byte_size) */
 312         .uleb128 0xb    /* (DW_FORM_data1) */
 313         .uleb128 0x3e   /* (DW_AT_encoding) */
 314         .uleb128 0xb    /* (DW_FORM_data1) */
 315         .uleb128 0x3    /* (DW_AT_name) */
 316         .uleb128 0x8    /* (DW_FORM_string) */
 317         .byte   0
 318         .byte   0
 319         .uleb128 0x5    /* (abbrev code) */
 320         .uleb128 0x11   /* (TAG: DW_TAG_compile_unit) */
 321         .byte   0x1     /* DW_children_yes */
 322         .uleb128 0x25   /* (DW_AT_producer) */
 323         .uleb128 0x8    /* (DW_FORM_string) */
 324         .uleb128 0x13   /* (DW_AT_language) */
 325         .uleb128 0xb    /* (DW_FORM_data1) */
 326         .uleb128 0x3    /* (DW_AT_name) */
 327         .uleb128 0x8    /* (DW_FORM_string) */
 328         .uleb128 0x1b   /* (DW_AT_comp_dir) */
 329         .uleb128 0x8    /* (DW_FORM_string) */
 330         .uleb128 0x2131 /* (DW_AT_GNU_dwo_id) */
 331         .uleb128 0x7    /* (DW_FORM_data8) */
 332         .byte   0
 333         .byte   0
 334         .uleb128 0x6    /* (abbrev code) */
 335         .uleb128 0x2e   /* (TAG: DW_TAG_subprogram) */
 336         .byte   0       /* DW_children_no */
 337         .uleb128 0x3f   /* (DW_AT_external) */
 338         .uleb128 0x19   /* (DW_FORM_flag_present) */
 339         .uleb128 0x3    /* (DW_AT_name) */
 340         .uleb128 0x8    /* (DW_FORM_string) */
 341         .uleb128 0x3a   /* (DW_AT_decl_file) */
 342         .uleb128 0xb    /* (DW_FORM_data1) */
 343         .uleb128 0x3b   /* (DW_AT_decl_line) */
 344         .uleb128 0xb    /* (DW_FORM_data1) */
 345         .uleb128 0x49   /* (DW_AT_type) */
 346         .uleb128 0x13   /* (DW_FORM_ref4) */
 347         .uleb128 0x11   /* (DW_AT_low_pc) */
 348         .uleb128 0x1f01 /* (DW_FORM_GNU_addr_index) */
 349         .uleb128 0x12   /* (DW_AT_high_pc) */
 350         .uleb128 0x6    /* (DW_FORM_data4) */
 351         .uleb128 0x40   /* (DW_AT_frame_base) */
 352         .uleb128 0x18   /* (DW_FORM_exprloc) */
 353         .byte   0
 354         .byte   0
 355         .uleb128 0x7    /* (abbrev code) */
 356         .uleb128 0x34   /* (TAG: DW_TAG_variable) */
 357         .byte   0       /* DW_children_no */
 358         .uleb128 0x3    /* (DW_AT_name) */
 359         .uleb128 0x8    /* (DW_FORM_string) */
 360         .uleb128 0x3a   /* (DW_AT_decl_file) */
 361         .uleb128 0xb    /* (DW_FORM_data1) */
 362         .uleb128 0x3b   /* (DW_AT_decl_line) */
 363         .uleb128 0xb    /* (DW_FORM_data1) */
 364         .uleb128 0x49   /* (DW_AT_type) */
 365         .uleb128 0x20   /* (DW_FORM_ref_sig8) */
 366         .uleb128 0x3f   /* (DW_AT_external) */
 367         .uleb128 0x19   /* (DW_FORM_flag_present) */
 368         .uleb128 0x2    /* (DW_AT_location) */
 369         .uleb128 0x18   /* (DW_FORM_exprloc) */
 370         .byte   0
 371         .byte   0
 372
 373         /* Manually inserted.  */
 374         .uleb128 0x8            /* abbrev code */
 375         .uleb128 0x2            /* DW_TAG_class_type */
 376         .byte   0x0             /* DW_has_children_no */
 377         .uleb128 0x47           /* DW_AT_specification */
 378         .uleb128 0x13           /* DW_FORM_ref4 */
 379         .byte   0x0             /* Terminator */
 380         .byte   0x0             /* Terminator */
 381         /* End of manual insertion.  */
 382
 383         .byte   0
 384         .section        .debug_pubnames
 385 .Ldebug_pubnames0:
 386         .4byte  0x1f    /* Length of Public Names Info */
 387         .2byte  0x2     /* DWARF Version */
 388         .4byte  .Lskeleton_debug_info0  /* Offset of Compilation Unit Info */
 389         .4byte  0xb0    /* Compilation Unit Length */
 390         .4byte  0x86    /* DIE offset */
 391         .ascii "main\0" /* external name */
 392         .4byte  0x9d    /* DIE offset */
 393         .ascii "baz\0"  /* external name */
 394         .4byte  0
 395         .section        .debug_pubtypes
 396 .Ldebug_pubtypes0:
 397         .4byte  0x1e    /* Length of Public Type Names Info */
 398         .2byte  0x2     /* DWARF Version */
 399         .4byte  .Lskeleton_debug_info0  /* Offset of Compilation Unit Info */
 400         .4byte  0xb0    /* Compilation Unit Length */
 401         .4byte  0x7f    /* DIE offset */
 402         .ascii "int\0"  /* external name */
 403         .4byte  0x25    /* DIE offset */
 404         .ascii "foo\0"  /* external name */
 405         .4byte  0
 406         .section        .debug_aranges
 407         .4byte  0x1c    /* Length of Address Ranges Info */
 408         .2byte  0x2     /* DWARF Version */
 409         .4byte  .Lskeleton_debug_info0  /* Offset of Compilation Unit Info */
 410         .byte   0x4     /* Size of Address */
 411         .byte   0       /* Size of Segment Descriptor */
 412         .2byte  0       /* Pad to 16 byte boundary */
 413         .2byte  0
 414         .4byte  .Ltext0 /* Address */
 415         .4byte  .Letext0-.Ltext0        /* Length */
 416         .4byte  0
 417         .4byte  0
 418         .section        .debug_line
 419 .Ldebug_line0:
 420         .section        .debug_line.dwo
 421 .Lskeleton_debug_line0:
 422         .4byte  .LELT0-.LSLT0   /* Length of Source Line Info */
 423 .LSLT0:
 424         .2byte  0x4     /* DWARF Version */
 425         .4byte  .LELTP0-.LASLTP0        /* Prolog Length */
 426 .LASLTP0:
 427         .byte   0x1     /* Minimum Instruction Length */
 428         .byte   0x1     /* Maximum Operations Per Instruction */
 429         .byte   0x1     /* Default is_stmt_start flag */
 430         .byte   0xf6    /* Line Base Value (Special Opcodes) */
 431         .byte   0xf5    /* Line Range Value (Special Opcodes) */
 432         .byte   0xa     /* Special Opcode Base */
 433         .byte   0       /* opcode: 0x1 has 0 args */
 434         .byte   0x1     /* opcode: 0x2 has 1 args */
 435         .byte   0x1     /* opcode: 0x3 has 1 args */
 436         .byte   0x1     /* opcode: 0x4 has 1 args */
 437         .byte   0x1     /* opcode: 0x5 has 1 args */
 438         .byte   0       /* opcode: 0x6 has 0 args */
 439         .byte   0       /* opcode: 0x7 has 0 args */
 440         .byte   0       /* opcode: 0x8 has 0 args */
 441         .byte   0x1     /* opcode: 0x9 has 1 args */
 442         .byte   0       /* End directory table */
 443         .ascii "fission-reread.cc\0"    /* File Entry: 0x1 */
 444         .uleb128 0
 445         .uleb128 0
 446         .uleb128 0
 447         .byte   0       /* End file name table */
 448 .LELTP0:
 449 .LELT0:
 450         .section        .debug_addr
 451 .Ldebug_addr0:
 452         .4byte  .LFB0   /* DW_AT_low_pc */
 453         .4byte  baz     /* DW_AT_location */