gdb/defs.h

   1 /* *INDENT-OFF* */ /* ATTRIBUTE_PRINTF confuses indent, avoid running it
   2                       for now.  */
   3 /* Basic, host-specific, and target-specific definitions for GDB.
   4    Copyright (C) 1986-2019 Free Software Foundation, Inc.
   5
   6    This file is part of GDB.
   7
   8    This program is free software; you can redistribute it and/or modify
   9    it under the terms of the GNU General Public License as published by
  10    the Free Software Foundation; either version 3 of the License, or
  11    (at your option) any later version.
  12
  13    This program is distributed in the hope that it will be useful,
  14    but WITHOUT ANY WARRANTY; without even the implied warranty of
  15    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  16    GNU General Public License for more details.
  17
  18    You should have received a copy of the GNU General Public License
  19    along with this program.  If not, see <http://www.gnu.org/licenses/>.  */
  20
  21 #ifndef DEFS_H
  22 #define DEFS_H
  23
  24 #ifdef GDBSERVER
  25 #  error gdbserver should not include gdb/defs.h
  26 #endif
  27
  28 #include "common/common-defs.h"
  29
  30 #include <sys/types.h>
  31 #include <limits.h>
  32
  33 /* The libdecnumber library, on which GDB depends, includes a header file
  34    called gstdint.h instead of relying directly on stdint.h.  GDB, on the
  35    other hand, includes stdint.h directly, relying on the fact that gnulib
  36    generates a copy if the system doesn't provide one or if it is missing
  37    some features.  Unfortunately, gstdint.h and stdint.h cannot be included
  38    at the same time, which may happen when we include a file from
  39    libdecnumber.
  40
  41    The following macro definition effectively prevents the inclusion of
  42    gstdint.h, as all the definitions it provides are guarded against
  43    the GCC_GENERATED_STDINT_H macro.  We already have gnulib/stdint.h
  44    included, so it's ok to blank out gstdint.h.  */
  45 #define GCC_GENERATED_STDINT_H 1
  46
  47 #include <unistd.h>
  48
  49 #include <fcntl.h>
  50
  51 #include "gdb_wchar.h"
  52
  53 #include "ui-file.h"
  54
  55 #include "common/host-defs.h"
  56 #include "common/enum-flags.h"
  57
  58 /* Scope types enumerator.  List the types of scopes the compiler will
  59    accept.  */
  60
  61 enum compile_i_scope_types
  62   {
  63     COMPILE_I_INVALID_SCOPE,
  64
  65     /* A simple scope.  Wrap an expression into a simple scope that
  66        takes no arguments, returns no value, and uses the generic
  67        function name "_gdb_expr". */
  68
  69     COMPILE_I_SIMPLE_SCOPE,
  70
  71     /* Do not wrap the expression,
  72        it has to provide function "_gdb_expr" on its own.  */
  73     COMPILE_I_RAW_SCOPE,
  74
  75     /* A printable expression scope.  Wrap an expression into a scope
  76        suitable for the "compile print" command.  It uses the generic
  77        function name "_gdb_expr".  COMPILE_I_PRINT_ADDRESS_SCOPE variant
  78        is the usual one, taking address of the object.
  79        COMPILE_I_PRINT_VALUE_SCOPE is needed for arrays where the array
  80        name already specifies its address.  See get_out_value_type.  */
  81     COMPILE_I_PRINT_ADDRESS_SCOPE,
  82     COMPILE_I_PRINT_VALUE_SCOPE,
  83   };
  84
  85
  86 template<typename T>
  87 using RequireLongest = gdb::Requires<gdb::Or<std::is_same<T, LONGEST>,
  88                                              std::is_same<T, ULONGEST>>>;
  89
  90 /* Just in case they're not defined in stdio.h.  */
  91
  92 #ifndef SEEK_SET
  93 #define SEEK_SET 0
  94 #endif
  95 #ifndef SEEK_CUR
  96 #define SEEK_CUR 1
  97 #endif
  98
  99 /* The O_BINARY flag is defined in fcntl.h on some non-Posix platforms.
 100    It is used as an access modifier in calls to open(), where it acts
 101    similarly to the "b" character in fopen()'s MODE argument.  On Posix
 102    platforms it should be a no-op, so it is defined as 0 here.  This
 103    ensures that the symbol may be used freely elsewhere in gdb.  */
 104
 105 #ifndef O_BINARY
 106 #define O_BINARY 0
 107 #endif
 108
 109 #include "hashtab.h"
 110
 111 /* * Enable dbx commands if set.  */
 112 extern int dbx_commands;
 113
 114 /* * System root path, used to find libraries etc.  */
 115 extern char *gdb_sysroot;
 116
 117 /* * GDB datadir, used to store data files.  */
 118 extern char *gdb_datadir;
 119
 120 /* * If non-NULL, the possibly relocated path to python's "lib" directory
 121    specified with --with-python.  */
 122 extern char *python_libdir;
 123
 124 /* * Search path for separate debug files.  */
 125 extern char *debug_file_directory;
 126
 127 /* GDB's SIGINT handler basically sets a flag; code that might take a
 128    long time before it gets back to the event loop, and which ought to
 129    be interruptible, checks this flag using the QUIT macro, which, if
 130    GDB has the terminal, throws a quit exception.
 131
 132    In addition to setting a flag, the SIGINT handler also marks a
 133    select/poll-able file descriptor as read-ready.  That is used by
 134    interruptible_select in order to support interrupting blocking I/O
 135    in a race-free manner.
 136
 137    These functions use the extension_language_ops API to allow extension
 138    language(s) and GDB SIGINT handling to coexist seamlessly.  */
 139
 140 /* * Evaluate to non-zero if the quit flag is set, zero otherwise.  This
 141    will clear the quit flag as a side effect.  */
 142 extern int check_quit_flag (void);
 143 /* * Set the quit flag.  */
 144 extern void set_quit_flag (void);
 145
 146 /* The current quit handler (and its type).  This is called from the
 147    QUIT macro.  See default_quit_handler below for default behavior.
 148    Parts of GDB temporarily override this to e.g., completely suppress
 149    Ctrl-C because it would not be safe to throw.  E.g., normally, you
 150    wouldn't want to quit between a RSP command and its response, as
 151    that would break the communication with the target, but you may
 152    still want to intercept the Ctrl-C and offer to disconnect if the
 153    user presses Ctrl-C multiple times while the target is stuck
 154    waiting for the wedged remote stub.  */
 155 typedef void (quit_handler_ftype) (void);
 156 extern quit_handler_ftype *quit_handler;
 157
 158 /* The default quit handler.  Checks whether Ctrl-C was pressed, and
 159    if so:
 160
 161      - If GDB owns the terminal, throws a quit exception.
 162
 163      - If GDB does not own the terminal, forwards the Ctrl-C to the
 164        target.
 165 */
 166 extern void default_quit_handler (void);
 167
 168 /* Flag that function quit should call quit_force.  */
 169 extern volatile int sync_quit_force_run;
 170
 171 extern void quit (void);
 172
 173 /* Helper for the QUIT macro.  */
 174
 175 extern void maybe_quit (void);
 176
 177 /* Check whether a Ctrl-C was typed, and if so, call the current quit
 178    handler.  */
 179 #define QUIT maybe_quit ()
 180
 181 /* Set the serial event associated with the quit flag.  */
 182 extern void quit_serial_event_set (void);
 183
 184 /* Clear the serial event associated with the quit flag.  */
 185 extern void quit_serial_event_clear (void);
 186
 187 /* * Languages represented in the symbol table and elsewhere.
 188    This should probably be in language.h, but since enum's can't
 189    be forward declared to satisfy opaque references before their
 190    actual definition, needs to be here.
 191
 192    The constants here are in priority order.  In particular,
 193    demangling is attempted according to this order.
 194
 195    Note that there's ambiguity between the mangling schemes of some of
 196    these languages, so some symbols could be successfully demangled by
 197    several languages.  For that reason, the constants here are sorted
 198    in the order we'll attempt demangling them.  For example: Rust uses
 199    C++ mangling, so must come after C++; Ada must come last (see
 200    ada_sniff_from_mangled_name).  (Keep this order in sync with the
 201    'languages' array in language.c.)  */
 202
 203 enum language
 204   {
 205     language_unknown,           /* Language not known */
 206     language_auto,              /* Placeholder for automatic setting */
 207     language_c,                 /* C */
 208     language_objc,              /* Objective-C */
 209     language_cplus,             /* C++ */
 210     language_d,                 /* D */
 211     language_go,                /* Go */
 212     language_fortran,           /* Fortran */
 213     language_m2,                /* Modula-2 */
 214     language_asm,               /* Assembly language */
 215     language_pascal,            /* Pascal */
 216     language_opencl,            /* OpenCL */
 217     language_rust,              /* Rust */
 218     language_minimal,           /* All other languages, minimal support only */
 219     language_ada,               /* Ada */
 220     nr_languages
 221   };
 222
 223 /* The number of bits needed to represent all languages, with enough
 224    padding to allow for reasonable growth.  */
 225 #define LANGUAGE_BITS 5
 226 gdb_static_assert (nr_languages <= (1 << LANGUAGE_BITS));
 227
 228 enum precision_type
 229   {
 230     single_precision,
 231     double_precision,
 232     unspecified_precision
 233   };
 234
 235 /* * A generic, not quite boolean, enumeration.  This is used for
 236    set/show commands in which the options are on/off/automatic.  */
 237 enum auto_boolean
 238 {
 239   AUTO_BOOLEAN_TRUE,
 240   AUTO_BOOLEAN_FALSE,
 241   AUTO_BOOLEAN_AUTO
 242 };
 243
 244 /* * Potential ways that a function can return a value of a given
 245    type.  */
 246
 247 enum return_value_convention
 248 {
 249   /* * Where the return value has been squeezed into one or more
 250      registers.  */
 251   RETURN_VALUE_REGISTER_CONVENTION,
 252   /* * Commonly known as the "struct return convention".  The caller
 253      passes an additional hidden first parameter to the caller.  That
 254      parameter contains the address at which the value being returned
 255      should be stored.  While typically, and historically, used for
 256      large structs, this is convention is applied to values of many
 257      different types.  */
 258   RETURN_VALUE_STRUCT_CONVENTION,
 259   /* * Like the "struct return convention" above, but where the ABI
 260      guarantees that the called function stores the address at which
 261      the value being returned is stored in a well-defined location,
 262      such as a register or memory slot in the stack frame.  Don't use
 263      this if the ABI doesn't explicitly guarantees this.  */
 264   RETURN_VALUE_ABI_RETURNS_ADDRESS,
 265   /* * Like the "struct return convention" above, but where the ABI
 266      guarantees that the address at which the value being returned is
 267      stored will be available in a well-defined location, such as a
 268      register or memory slot in the stack frame.  Don't use this if
 269      the ABI doesn't explicitly guarantees this.  */
 270   RETURN_VALUE_ABI_PRESERVES_ADDRESS,
 271 };
 272
 273 /* Needed for various prototypes */
 274
 275 struct symtab;
 276 struct breakpoint;
 277 struct frame_info;
 278 struct gdbarch;
 279 struct value;
 280
 281 /* From main.c.  */
 282
 283 /* This really belong in utils.c (path-utils.c?), but it references some
 284    globals that are currently only available to main.c.  */
 285 extern char *relocate_gdb_directory (const char *initial, int flag);
 286
 287 \f
 288 /* Annotation stuff.  */
 289
 290 extern int annotation_level;    /* in stack.c */
 291 \f
 292
 293 /* From regex.c or libc.  BSD 4.4 declares this with the argument type as
 294    "const char *" in unistd.h, so we can't declare the argument
 295    as "char *".  */
 296
 297 EXTERN_C char *re_comp (const char *);
 298
 299 /* From symfile.c */
 300
 301 extern void symbol_file_command (const char *, int);
 302
 303 /* * Remote targets may wish to use this as their load function.  */
 304 extern void generic_load (const char *name, int from_tty);
 305
 306 /* From top.c */
 307
 308 typedef void initialize_file_ftype (void);
 309
 310 extern char *gdb_readline_wrapper (const char *);
 311
 312 extern char *command_line_input (const char *, const char *);
 313
 314 extern void print_prompt (void);
 315
 316 struct ui;
 317
 318 extern int input_interactive_p (struct ui *);
 319
 320 extern int info_verbose;
 321
 322 /* From printcmd.c */
 323
 324 extern void set_next_address (struct gdbarch *, CORE_ADDR);
 325
 326 extern int print_address_symbolic (struct gdbarch *, CORE_ADDR,
 327                                    struct ui_file *, int,
 328                                    const char *);
 329
 330 extern void print_address (struct gdbarch *, CORE_ADDR, struct ui_file *);
 331 extern const char *pc_prefix (CORE_ADDR);
 332
 333 /* From exec.c */
 334
 335 /* * Process memory area starting at ADDR with length SIZE.  Area is
 336    readable iff READ is non-zero, writable if WRITE is non-zero,
 337    executable if EXEC is non-zero.  Area is possibly changed against
 338    its original file based copy if MODIFIED is non-zero.  DATA is
 339    passed without changes from a caller.  */
 340
 341 typedef int (*find_memory_region_ftype) (CORE_ADDR addr, unsigned long size,
 342                                          int read, int write, int exec,
 343                                          int modified, void *data);
 344
 345 /* * Possible lvalue types.  Like enum language, this should be in
 346    value.h, but needs to be here for the same reason.  */
 347
 348 enum lval_type
 349   {
 350     /* * Not an lval.  */
 351     not_lval,
 352     /* * In memory.  */
 353     lval_memory,
 354     /* * In a register.  Registers are relative to a frame.  */
 355     lval_register,
 356     /* * In a gdb internal variable.  */
 357     lval_internalvar,
 358     /* * Value encapsulates a callable defined in an extension language.  */
 359     lval_xcallable,
 360     /* * Part of a gdb internal variable (structure field).  */
 361     lval_internalvar_component,
 362     /* * Value's bits are fetched and stored using functions provided
 363        by its creator.  */
 364     lval_computed
 365   };
 366
 367 /* * Parameters of the "info proc" command.  */
 368
 369 enum info_proc_what
 370   {
 371     /* * Display the default cmdline, cwd and exe outputs.  */
 372     IP_MINIMAL,
 373
 374     /* * Display `info proc mappings'.  */
 375     IP_MAPPINGS,
 376
 377     /* * Display `info proc status'.  */
 378     IP_STATUS,
 379
 380     /* * Display `info proc stat'.  */
 381     IP_STAT,
 382
 383     /* * Display `info proc cmdline'.  */
 384     IP_CMDLINE,
 385
 386     /* * Display `info proc exe'.  */
 387     IP_EXE,
 388
 389     /* * Display `info proc cwd'.  */
 390     IP_CWD,
 391
 392     /* * Display `info proc files'.  */
 393     IP_FILES,
 394
 395     /* * Display all of the above.  */
 396     IP_ALL
 397   };
 398
 399 /* * Default radixes for input and output.  Only some values supported.  */
 400 extern unsigned input_radix;
 401 extern unsigned output_radix;
 402
 403 /* * Possibilities for prettyformat parameters to routines which print
 404    things.  Like enum language, this should be in value.h, but needs
 405    to be here for the same reason.  FIXME:  If we can eliminate this
 406    as an arg to LA_VAL_PRINT, then we can probably move it back to
 407    value.h.  */
 408
 409 enum val_prettyformat
 410   {
 411     Val_no_prettyformat = 0,
 412     Val_prettyformat,
 413     /* * Use the default setting which the user has specified.  */
 414     Val_prettyformat_default
 415   };
 416
 417 /* * Optional native machine support.  Non-native (and possibly pure
 418    multi-arch) targets do not need a "nm.h" file.  This will be a
 419    symlink to one of the nm-*.h files, built by the `configure'
 420    script.  */
 421
 422 #ifdef GDB_NM_FILE
 423 #include "nm.h"
 424 #endif
 425
 426 /* Assume that fopen accepts the letter "b" in the mode string.
 427    It is demanded by ISO C9X, and should be supported on all
 428    platforms that claim to have a standard-conforming C library.  On
 429    true POSIX systems it will be ignored and have no effect.  There
 430    may still be systems without a standard-conforming C library where
 431    an ISO C9X compiler (GCC) is available.  Known examples are SunOS
 432    4.x and 4.3BSD.  This assumption means these systems are no longer
 433    supported.  */
 434 #ifndef FOPEN_RB
 435 # include "fopen-bin.h"
 436 #endif
 437
 438 /* Defaults for system-wide constants (if not defined by xm.h, we fake it).
 439    FIXME: Assumes 2's complement arithmetic.  */
 440
 441 #if !defined (UINT_MAX)
 442 #define UINT_MAX ((unsigned int)(~0))       /* 0xFFFFFFFF for 32-bits */
 443 #endif
 444
 445 #if !defined (INT_MAX)
 446 #define INT_MAX ((int)(UINT_MAX >> 1))      /* 0x7FFFFFFF for 32-bits */
 447 #endif
 448
 449 #if !defined (INT_MIN)
 450 #define INT_MIN ((int)((int) ~0 ^ INT_MAX)) /* 0x80000000 for 32-bits */
 451 #endif
 452
 453 #if !defined (ULONG_MAX)
 454 #define ULONG_MAX ((unsigned long)(~0L))    /* 0xFFFFFFFF for 32-bits */
 455 #endif
 456
 457 #if !defined (LONG_MAX)
 458 #define LONG_MAX ((long)(ULONG_MAX >> 1))   /* 0x7FFFFFFF for 32-bits */
 459 #endif
 460
 461 #if !defined (ULONGEST_MAX)
 462 #define ULONGEST_MAX (~(ULONGEST)0)        /* 0xFFFFFFFFFFFFFFFF for 64-bits */
 463 #endif
 464
 465 #if !defined (LONGEST_MAX)                 /* 0x7FFFFFFFFFFFFFFF for 64-bits */
 466 #define LONGEST_MAX ((LONGEST)(ULONGEST_MAX >> 1))
 467 #endif
 468
 469 /* * Convert a LONGEST to an int.  This is used in contexts (e.g. number of
 470    arguments to a function, number in a value history, register number, etc.)
 471    where the value must not be larger than can fit in an int.  */
 472
 473 extern int longest_to_int (LONGEST);
 474
 475 /* * List of known OS ABIs.  If you change this, make sure to update the
 476    table in osabi.c.  */
 477 enum gdb_osabi
 478 {
 479   GDB_OSABI_UNKNOWN = 0,        /* keep this zero */
 480   GDB_OSABI_NONE,
 481
 482   GDB_OSABI_SVR4,
 483   GDB_OSABI_HURD,
 484   GDB_OSABI_SOLARIS,
 485   GDB_OSABI_LINUX,
 486   GDB_OSABI_FREEBSD,
 487   GDB_OSABI_NETBSD,
 488   GDB_OSABI_OPENBSD,
 489   GDB_OSABI_WINCE,
 490   GDB_OSABI_GO32,
 491   GDB_OSABI_QNXNTO,
 492   GDB_OSABI_CYGWIN,
 493   GDB_OSABI_AIX,
 494   GDB_OSABI_DICOS,
 495   GDB_OSABI_DARWIN,
 496   GDB_OSABI_SYMBIAN,
 497   GDB_OSABI_OPENVMS,
 498   GDB_OSABI_LYNXOS178,
 499   GDB_OSABI_NEWLIB,
 500   GDB_OSABI_SDE,
 501   GDB_OSABI_PIKEOS,
 502
 503   GDB_OSABI_INVALID             /* keep this last */
 504 };
 505
 506 /* Enumerate the requirements a symbol has in order to be evaluated.
 507    These are listed in order of "strength" -- a later entry subsumes
 508    earlier ones.  This fine-grained distinction is important because
 509    it allows for the evaluation of a TLS symbol during unwinding --
 510    when unwinding one has access to registers, but not the frame
 511    itself, because that is being constructed.  */
 512
 513 enum symbol_needs_kind
 514 {
 515   /* No special requirements -- just memory.  */
 516   SYMBOL_NEEDS_NONE,
 517
 518   /* The symbol needs registers.  */
 519   SYMBOL_NEEDS_REGISTERS,
 520
 521   /* The symbol needs a frame.  */
 522   SYMBOL_NEEDS_FRAME
 523 };
 524
 525 /* Dynamic target-system-dependent parameters for GDB.  */
 526 #include "gdbarch.h"
 527
 528 /* In findvar.c.  */
 529
 530 template<typename T, typename = RequireLongest<T>>
 531 T extract_integer (const gdb_byte *addr, int len, enum bfd_endian byte_order);
 532
 533 static inline LONGEST
 534 extract_signed_integer (const gdb_byte *addr, int len,
 535                         enum bfd_endian byte_order)
 536 {
 537   return extract_integer<LONGEST> (addr, len, byte_order);
 538 }
 539
 540 static inline ULONGEST
 541 extract_unsigned_integer (const gdb_byte *addr, int len,
 542                           enum bfd_endian byte_order)
 543 {
 544   return extract_integer<ULONGEST> (addr, len, byte_order);
 545 }
 546
 547 extern int extract_long_unsigned_integer (const gdb_byte *, int,
 548                                           enum bfd_endian, LONGEST *);
 549
 550 extern CORE_ADDR extract_typed_address (const gdb_byte *buf,
 551                                         struct type *type);
 552
 553 /* All 'store' functions accept a host-format integer and store a
 554    target-format integer at ADDR which is LEN bytes long.  */
 555
 556 template<typename T, typename = RequireLongest<T>>
 557 extern void store_integer (gdb_byte *addr, int len, enum bfd_endian byte_order,
 558                            T val);
 559
 560 static inline void
 561 store_signed_integer (gdb_byte *addr, int len,
 562                       enum bfd_endian byte_order, LONGEST val)
 563 {
 564   return store_integer (addr, len, byte_order, val);
 565 }
 566
 567 static inline void
 568 store_unsigned_integer (gdb_byte *addr, int len,
 569                         enum bfd_endian byte_order, ULONGEST val)
 570 {
 571   return store_integer (addr, len, byte_order, val);
 572 }
 573
 574 extern void store_typed_address (gdb_byte *buf, struct type *type,
 575                                  CORE_ADDR addr);
 576
 577 extern void copy_integer_to_size (gdb_byte *dest, int dest_size,
 578                                   const gdb_byte *source, int source_size,
 579                                   bool is_signed, enum bfd_endian byte_order);
 580
 581 /* Hooks for alternate command interfaces.  */
 582
 583 struct target_waitstatus;
 584 struct cmd_list_element;
 585
 586 extern void (*deprecated_pre_add_symbol_hook) (const char *);
 587 extern void (*deprecated_post_add_symbol_hook) (void);
 588 extern void (*selected_frame_level_changed_hook) (int);
 589 extern int (*deprecated_ui_loop_hook) (int signo);
 590 extern void (*deprecated_show_load_progress) (const char *section,
 591                                               unsigned long section_sent,
 592                                               unsigned long section_size,
 593                                               unsigned long total_sent,
 594                                               unsigned long total_size);
 595 extern void (*deprecated_print_frame_info_listing_hook) (struct symtab * s,
 596                                                          int line,
 597                                                          int stopline,
 598                                                          int noerror);
 599 extern int (*deprecated_query_hook) (const char *, va_list)
 600      ATTRIBUTE_FPTR_PRINTF(1,0);
 601 extern void (*deprecated_warning_hook) (const char *, va_list)
 602      ATTRIBUTE_FPTR_PRINTF(1,0);
 603 extern void (*deprecated_readline_begin_hook) (const char *, ...)
 604      ATTRIBUTE_FPTR_PRINTF_1;
 605 extern char *(*deprecated_readline_hook) (const char *);
 606 extern void (*deprecated_readline_end_hook) (void);
 607 extern void (*deprecated_context_hook) (int);
 608 extern ptid_t (*deprecated_target_wait_hook) (ptid_t ptid,
 609                                               struct target_waitstatus *status,
 610                                               int options);
 611
 612 extern void (*deprecated_attach_hook) (void);
 613 extern void (*deprecated_detach_hook) (void);
 614 extern void (*deprecated_call_command_hook) (struct cmd_list_element * c,
 615                                              const char *cmd, int from_tty);
 616
 617 extern int (*deprecated_ui_load_progress_hook) (const char *section,
 618                                                 unsigned long num);
 619
 620 /* If this definition isn't overridden by the header files, assume
 621    that isatty and fileno exist on this system.  */
 622 #ifndef ISATTY
 623 #define ISATTY(FP)      (isatty (fileno (FP)))
 624 #endif
 625
 626 /* * A width that can achieve a better legibility for GDB MI mode.  */
 627 #define GDB_MI_MSG_WIDTH  80
 628
 629 /* From progspace.c */
 630
 631 extern void initialize_progspace (void);
 632 extern void initialize_inferiors (void);
 633
 634 /* * Special block numbers */
 635
 636 enum block_enum
 637 {
 638   GLOBAL_BLOCK = 0,
 639   STATIC_BLOCK = 1,
 640   FIRST_LOCAL_BLOCK = 2
 641 };
 642
 643 /* User selection used in observable.h and multiple print functions.  */
 644
 645 enum user_selected_what_flag
 646   {
 647     /* Inferior selected.  */
 648     USER_SELECTED_INFERIOR = 1 << 1,
 649
 650     /* Thread selected.  */
 651     USER_SELECTED_THREAD = 1 << 2,
 652
 653     /* Frame selected.  */
 654     USER_SELECTED_FRAME = 1 << 3
 655   };
 656 DEF_ENUM_FLAGS_TYPE (enum user_selected_what_flag, user_selected_what);
 657
 658 #include "utils.h"
 659
 660 #endif /* #ifndef DEFS_H */