gdb/stap-probe.h

   1 /* SystemTap probe support for GDB.
   2
   3    Copyright (C) 2012-2020 Free Software Foundation, Inc.
   4
   5    This file is part of GDB.
   6
   7    This program is free software; you can redistribute it and/or modify
   8    it under the terms of the GNU General Public License as published by
   9    the Free Software Foundation; either version 3 of the License, or
  10    (at your option) any later version.
  11
  12    This program is distributed in the hope that it will be useful,
  13    but WITHOUT ANY WARRANTY; without even the implied warranty of
  14    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15    GNU General Public License for more details.
  16
  17    You should have received a copy of the GNU General Public License
  18    along with this program.  If not, see <http://www.gnu.org/licenses/>.  */
  19
  20 #if !defined (STAP_PROBE_H)
  21 #define STAP_PROBE_H 1
  22
  23 #include "parser-defs.h"
  24
  25 /* Structure which holds information about the parsing process of one probe's
  26    argument.  */
  27
  28 struct stap_parse_info
  29 {
  30   stap_parse_info (const char *arg_, struct type *arg_type_,
  31                    const struct language_defn *lang,
  32                    struct gdbarch *gdbarch)
  33     : arg (arg_),
  34       pstate (lang, gdbarch),
  35       saved_arg (arg_),
  36       arg_type (arg_type_),
  37       gdbarch (gdbarch),
  38       inside_paren_p (0)
  39   {
  40   }
  41
  42   DISABLE_COPY_AND_ASSIGN (stap_parse_info);
  43
  44   /* The probe's argument in a string format.  */
  45   const char *arg;
  46
  47   /* The parser state to be used when generating the expression.  */
  48   struct expr_builder pstate;
  49
  50   /* A pointer to the full chain of arguments.  This is useful for printing
  51      error messages.  The parser functions should not modify this argument
  52      directly; instead, they should use the ARG pointer above.  */
  53   const char *saved_arg;
  54
  55   /* The expected argument type (bitness), as defined in the probe's
  56      argument.  For instance, if the argument begins with `-8@', it means
  57      the bitness is 64-bit signed.  In this case, ARG_TYPE would represent
  58      the type `int64_t'.  */
  59   struct type *arg_type;
  60
  61   /* A pointer to the current gdbarch.  */
  62   struct gdbarch *gdbarch;
  63
  64   /* Greater than zero if we are inside a parenthesized expression.  Useful
  65      for knowing when to skip spaces or not.  */
  66   int inside_paren_p;
  67 };
  68
  69 #endif /* !defined (STAP_PROBE_H) */