gcc/gcc-plugin.h

   1 /* Public header file for plugins to include.
   2    Copyright (C) 2009 Free Software Foundation, Inc.
   3
   4 This file is part of GCC.
   5
   6 GCC is free software; you can redistribute it and/or modify
   7 it under the terms of the GNU General Public License as published by
   8 the Free Software Foundation; either version 3, or (at your option)
   9 any later version.
  10
  11 GCC is distributed in the hope that it will be useful,
  12 but WITHOUT ANY WARRANTY; without even the implied warranty of
  13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14 GNU General Public License for more details.
  15
  16 You should have received a copy of the GNU General Public License
  17 along with GCC; see the file COPYING3.  If not see
  18 <http://www.gnu.org/licenses/>.  */
  19
  20 #ifndef GCC_PLUGIN_H
  21 #define GCC_PLUGIN_H
  22
  23 /* Event names.  Keep in sync with plugin_event_name[].  */
  24 enum plugin_event
  25 {
  26   PLUGIN_PASS_MANAGER_SETUP,    /* To hook into pass manager.  */
  27   PLUGIN_FINISH_TYPE,           /* After finishing parsing a type.  */
  28   PLUGIN_FINISH_UNIT,           /* Useful for summary processing.  */
  29   PLUGIN_CXX_CP_PRE_GENERICIZE, /* Allows to see low level AST in C++ FE.  */
  30   PLUGIN_FINISH,                /* Called before GCC exits.  */
  31   PLUGIN_INFO,                  /* Information about the plugin */
  32   PLUGIN_EVENT_LAST             /* Dummy event used for indexing callback
  33                                    array.  */
  34 };
  35
  36 extern const char *plugin_event_name[];
  37
  38 struct plugin_argument
  39 {
  40   char *key;    /* key of the argument.  */
  41   char *value;  /* value is optional and can be NULL.  */
  42 };
  43
  44 enum pass_positioning_ops
  45 {
  46   PASS_POS_INSERT_AFTER,  /* Insert after the reference pass.  */
  47   PASS_POS_INSERT_BEFORE, /* Insert before the reference pass.  */
  48   PASS_POS_REPLACE        /* Replace the reference pass.  */
  49 };
  50
  51 struct plugin_pass
  52 {
  53   struct opt_pass *pass;            /* New pass provided by the plugin.  */
  54   const char *reference_pass_name;  /* Name of the reference pass for hooking
  55                                        up the new pass.  */
  56   int ref_pass_instance_number;     /* Insert the pass at the specified
  57                                        instance number of the reference pass.
  58                                        Do it for every instance if it is 0.  */
  59   enum pass_positioning_ops pos_op; /* how to insert the new pass.  */
  60 };
  61
  62 /* Additional information about the plugin. Used by --help and --version. */
  63
  64 struct plugin_info
  65 {
  66   const char *version;
  67   const char *help;
  68 };
  69
  70 /* Represents the gcc version. Used to avoid using an incompatible plugin. */
  71
  72 struct plugin_gcc_version
  73 {
  74   const char *basever;
  75   const char *datestamp;
  76   const char *devphase;
  77   const char *revision;
  78   const char *configuration_arguments;
  79 };
  80
  81 extern struct plugin_gcc_version plugin_gcc_version;
  82
  83 /* The default version check. Compares every field in VERSION. */
  84
  85 extern bool plugin_default_version_check(struct plugin_gcc_version *version);
  86
  87 /* Function type for the plugin initialization routine. Each plugin module
  88    should define this as an externally-visible function with name
  89    "plugin_init."
  90
  91    PLUGIN_NAME - name of the plugin (useful for error reporting)
  92    VERSION     - the plugin_gcc_version symbol of the plugin itself.
  93    ARGC        - the size of the ARGV array
  94    ARGV        - an array of key-value argument pair
  95
  96    Returns 0 if initialization finishes successfully.  */
  97
  98 typedef int (*plugin_init_func) (const char *plugin_name,
  99                                  struct plugin_gcc_version *version,
 100                                  int argc, struct plugin_argument *argv);
 101
 102 /* Declaration for "plugin_init" function so that it doesn't need to be
 103    duplicated in every plugin.  */
 104 extern int plugin_init (const char *, struct plugin_gcc_version *version,
 105                         int, struct plugin_argument *);
 106
 107 /* Function type for a plugin callback routine.
 108
 109    GCC_DATA  - event-specific data provided by GCC
 110    USER_DATA - plugin-specific data provided by the plugin  */
 111
 112 typedef void (*plugin_callback_func) (void *gcc_data, void *user_data);
 113
 114 /* Called from the plugin's initialization code. Register a single callback.
 115    This function can be called multiple times.
 116
 117    PLUGIN_NAME - display name for this plugin
 118    EVENT       - which event the callback is for
 119    CALLBACK    - the callback to be called at the event
 120    USER_DATA   - plugin-provided data   */
 121
 122 extern void register_callback (const char *plugin_name,
 123                                enum plugin_event event,
 124                                plugin_callback_func callback,
 125                                void *user_data);
 126
 127 #endif /* GCC_PLUGIN_H */