gdb/stap-probe.h

   1 /* SystemTap probe support for GDB.
   2
   3    Copyright (C) 2012-2018 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 /* For `struct parser_state'.  */
  24 #include "parser-defs.h"
  25
  26 /* Structure which holds information about the parsing process of one probe's
  27    argument.  */
  28
  29 struct stap_parse_info
  30 {
  31   stap_parse_info (const char *arg_, struct type *arg_type_,
  32                    size_t initial_size, const struct language_defn *lang,
  33                    struct gdbarch *gdbarch)
  34     : arg (arg_),
  35       pstate (initial_size, lang, gdbarch),
  36       saved_arg (arg_),
  37       arg_type (arg_type_),
  38       gdbarch (gdbarch),
  39       inside_paren_p (0)
  40   {
  41   }
  42
  43   DISABLE_COPY_AND_ASSIGN (stap_parse_info);
  44
  45   /* The probe's argument in a string format.  */
  46   const char *arg;
  47
  48   /* The parser state to be used when generating the expression.  */
  49   struct parser_state pstate;
  50
  51   /* A pointer to the full chain of arguments.  This is useful for printing
  52      error messages.  The parser functions should not modify this argument
  53      directly; instead, they should use the ARG pointer above.  */
  54   const char *saved_arg;
  55
  56   /* The expected argument type (bitness), as defined in the probe's
  57      argument.  For instance, if the argument begins with `-8@', it means
  58      the bitness is 64-bit signed.  In this case, ARG_TYPE would represent
  59      the type `int64_t'.  */
  60   struct type *arg_type;
  61
  62   /* A pointer to the current gdbarch.  */
  63   struct gdbarch *gdbarch;
  64
  65   /* Greater than zero if we are inside a parenthesized expression.  Useful
  66      for knowing when to skip spaces or not.  */
  67   int inside_paren_p;
  68 };
  69
  70 #endif /* !defined (STAP_PROBE_H) */