gdb/linespec.h

   1 /* Header for GDB line completion.
   2    Copyright (C) 2000-2017 Free Software Foundation, Inc.
   3
   4    This program is free software; you can redistribute it and/or modify
   5    it under the terms of the GNU General Public License as published by
   6    the Free Software Foundation; either version 3 of the License, or
   7    (at your option) any later version.
   8
   9    This program is distributed in the hope that it will be useful,
  10    but WITHOUT ANY WARRANTY; without even the implied warranty of
  11    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  12    GNU General Public License for more details.
  13
  14    You should have received a copy of the GNU General Public License
  15    along with this program.  If not, see <http://www.gnu.org/licenses/>.  */
  16
  17 #if !defined (LINESPEC_H)
  18 #define LINESPEC_H 1
  19
  20 struct symtab;
  21
  22 #include "location.h"
  23 #include "vec.h"
  24
  25 /* Flags to pass to decode_line_1 and decode_line_full.  */
  26
  27 enum decode_line_flags
  28   {
  29     /* Set this flag if you want the resulting SALs to describe the
  30        first line of indicated functions.  */
  31     DECODE_LINE_FUNFIRSTLINE = 1,
  32
  33     /* Set this flag if you want "list mode".  In this mode, a
  34        FILE:LINE linespec will always return a result, and such
  35        linespecs will not be expanded to all matches.  */
  36     DECODE_LINE_LIST_MODE = 2
  37   };
  38
  39 /* decode_line_full returns a vector of these.  */
  40
  41 struct linespec_sals
  42 {
  43   /* This is the location corresponding to the sals contained in this
  44      object.  It can be passed as the FILTER argument to future calls
  45      to decode_line_full.  This is freed by the linespec_result
  46      destructor.  */
  47   char *canonical;
  48
  49   /* Sals.  */
  50   std::vector<symtab_and_line> sals;
  51 };
  52
  53 /* An instance of this may be filled in by decode_line_1.  The caller
  54    must make copies of any data that it needs to keep.  */
  55
  56 struct linespec_result
  57 {
  58   linespec_result () = default;
  59   ~linespec_result ();
  60
  61   DISABLE_COPY_AND_ASSIGN (linespec_result);
  62
  63   /* If true, the linespec should be displayed to the user.  This
  64      is used by "unusual" linespecs where the ordinary `info break'
  65      display mechanism would do the wrong thing.  */
  66   bool special_display = false;
  67
  68   /* If true, the linespec result should be considered to be a
  69      "pre-expanded" multi-location linespec.  A pre-expanded linespec
  70      holds all matching locations in a single linespec_sals
  71      object.  */
  72   bool pre_expanded = false;
  73
  74   /* If PRE_EXPANDED is non-zero, this is set to the location entered
  75      by the user.  */
  76   event_location_up location;
  77
  78   /* The sals.  The vector will be freed by the destructor.  */
  79   std::vector<linespec_sals> lsals;
  80 };
  81
  82 /* Decode a linespec using the provided default symtab and line.  */
  83
  84 extern std::vector<symtab_and_line>
  85         decode_line_1 (const struct event_location *location, int flags,
  86                        struct program_space *search_pspace,
  87                        struct symtab *default_symtab, int default_line);
  88
  89 /* Parse LOCATION and return results.  This is the "full"
  90    interface to this module, which handles multiple results
  91    properly.
  92
  93    For FLAGS, see decode_line_flags.  DECODE_LINE_LIST_MODE is not
  94    valid for this function.
  95
  96    If SEARCH_PSPACE is not NULL, symbol search is restricted to just
  97    that program space.
  98
  99    DEFAULT_SYMTAB and DEFAULT_LINE describe the default location.
 100    DEFAULT_SYMTAB can be NULL, in which case the current symtab and
 101    line are used.
 102
 103    CANONICAL is where the results are stored.  It must not be NULL.
 104
 105    SELECT_MODE must be one of the multiple_symbols_* constants, or
 106    NULL.  It determines how multiple results will be handled.  If
 107    NULL, the appropriate CLI value will be used.
 108
 109    FILTER can either be NULL or a string holding a canonical name.
 110    This is only valid when SELECT_MODE is multiple_symbols_all.
 111
 112    Multiple results are handled differently depending on the
 113    arguments:
 114
 115    . With multiple_symbols_cancel, an exception is thrown.
 116
 117    . With multiple_symbols_ask, a menu is presented to the user.  The
 118    user may select none, in which case an exception is thrown; or all,
 119    which is handled like multiple_symbols_all, below.  Otherwise,
 120    CANONICAL->SALS will have one entry for each name the user chose.
 121
 122    . With multiple_symbols_all, CANONICAL->SALS will have a single
 123    entry describing all the matching locations.  If FILTER is
 124    non-NULL, then only locations whose canonical name is equal (in the
 125    strcmp sense) to FILTER will be returned; all others will be
 126    filtered out.  */
 127
 128 extern void decode_line_full (const struct event_location *location, int flags,
 129                               struct program_space *search_pspace,
 130                               struct symtab *default_symtab, int default_line,
 131                               struct linespec_result *canonical,
 132                               const char *select_mode,
 133                               const char *filter);
 134
 135 /* Given a string, return the line specified by it, using the current
 136    source symtab and line as defaults.
 137    This is for commands like "list" and "breakpoint".  */
 138
 139 extern std::vector<symtab_and_line> decode_line_with_current_source
 140     (const char *, int);
 141
 142 /* Given a string, return the line specified by it, using the last displayed
 143    codepoint's values as defaults, or nothing if they aren't valid.  */
 144
 145 extern std::vector<symtab_and_line> decode_line_with_last_displayed
 146     (const char *, int);
 147
 148 /* Does P represent one of the keywords?  If so, return
 149    the keyword.  If not, return NULL.  */
 150
 151 extern const char *linespec_lexer_lex_keyword (const char *p);
 152
 153 /* Parse a line offset from STRING.  */
 154
 155 extern struct line_offset linespec_parse_line_offset (const char *string);
 156
 157 /* Return the quote characters permitted by the linespec parser.  */
 158
 159 extern const char *get_gdb_linespec_parser_quote_characters (void);
 160
 161 /* Does STRING represent an Ada operator?  If so, return the length
 162    of the decoded operator name.  If not, return 0.  */
 163
 164 extern int is_ada_operator (const char *string);
 165
 166 /* Find an instance of the character C in the string S that is outside
 167    of all parenthesis pairs, single-quoted strings, and double-quoted
 168    strings.  Also, ignore the char within a template name, like a ','
 169    within foo<int, int>.  */
 170
 171 extern const char *find_toplevel_char (const char *s, char c);
 172
 173 /* Find the end of the (first) linespec pointed to by *STRINGP.
 174    STRINGP will be advanced to this point.  */
 175
 176 extern void linespec_lex_to_end (const char **stringp);
 177
 178 extern const char * const linespec_keywords[];
 179
 180 /* Complete a linespec.  */
 181
 182 extern void linespec_complete (completion_tracker &tracker,
 183                                const char *text);
 184
 185 /* Complete a function symbol, in linespec mode.  If SOURCE_FILENAME
 186    is non-NULL, limits completion to the list of functions defined in
 187    source files that match SOURCE_FILENAME.  */
 188
 189 extern void linespec_complete_function (completion_tracker &tracker,
 190                                         const char *function,
 191                                         const char *source_filename);
 192
 193 /* Complete a label symbol, in linespec mode.  Only labels of
 194    functions named FUNCTION_NAME are considered.  If SOURCE_FILENAME
 195    is non-NULL, limits completion to labels of functions defined in
 196    source files that match SOURCE_FILENAME.  */
 197
 198 extern void linespec_complete_label (completion_tracker &tracker,
 199                                      const struct language_defn *language,
 200                                      const char *source_filename,
 201                                      const char *function_name,
 202                                      const char *label_name);
 203
 204 /* Evaluate the expression pointed to by EXP_PTR into a CORE_ADDR,
 205    advancing EXP_PTR past any parsed text.  */
 206
 207 extern CORE_ADDR linespec_expression_to_pc (const char **exp_ptr);
 208 #endif /* defined (LINESPEC_H) */