gcc/gcc-plugin.h

   1 /* Public header file for plugins to include.
   2    Copyright (C) 2009-2014 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 #ifndef IN_GCC
  24 #define IN_GCC
  25 #endif
  26
  27 #include "config.h"
  28 #include "system.h"
  29 #include "coretypes.h"
  30 #include "highlev-plugin-common.h"
  31 #include "hashtab.h"
  32
  33 /* Event names.  */
  34 enum plugin_event
  35 {
  36 # define DEFEVENT(NAME) NAME,
  37 # include "plugin.def"
  38 # undef DEFEVENT
  39   PLUGIN_EVENT_FIRST_DYNAMIC
  40 };
  41
  42 /* All globals declared here have C linkage to reduce link compatibility
  43    issues with implementation language choice and mangling.  */
  44 #ifdef __cplusplus
  45 extern "C" {
  46 #endif
  47
  48 extern const char **plugin_event_name;
  49
  50 struct plugin_argument
  51 {
  52   char *key;    /* key of the argument.  */
  53   char *value;  /* value is optional and can be NULL.  */
  54 };
  55
  56 /* Additional information about the plugin. Used by --help and --version. */
  57
  58 struct plugin_info
  59 {
  60   const char *version;
  61   const char *help;
  62 };
  63
  64 /* Represents the gcc version. Used to avoid using an incompatible plugin. */
  65
  66 struct plugin_gcc_version
  67 {
  68   const char *basever;
  69   const char *datestamp;
  70   const char *devphase;
  71   const char *revision;
  72   const char *configuration_arguments;
  73 };
  74
  75 /* Object that keeps track of the plugin name and its arguments. */
  76 struct plugin_name_args
  77 {
  78   char *base_name;              /* Short name of the plugin (filename without
  79                                    .so suffix). */
  80   const char *full_name;        /* Path to the plugin as specified with
  81                                    -fplugin=. */
  82   int argc;                     /* Number of arguments specified with
  83                                    -fplugin-arg-... */
  84   struct plugin_argument *argv; /* Array of ARGC key-value pairs. */
  85   const char *version;          /* Version string provided by plugin. */
  86   const char *help;             /* Help string provided by plugin. */
  87 };
  88
  89 /* The default version check. Compares every field in VERSION. */
  90
  91 extern bool plugin_default_version_check (struct plugin_gcc_version *,
  92                                           struct plugin_gcc_version *);
  93
  94 /* Function type for the plugin initialization routine. Each plugin module
  95    should define this as an externally-visible function with name
  96    "plugin_init."
  97
  98    PLUGIN_INFO - plugin invocation information.
  99    VERSION     - the plugin_gcc_version symbol of GCC.
 100
 101    Returns 0 if initialization finishes successfully.  */
 102
 103 typedef int (*plugin_init_func) (struct plugin_name_args *plugin_info,
 104                                  struct plugin_gcc_version *version);
 105
 106 /* Declaration for "plugin_init" function so that it doesn't need to be
 107    duplicated in every plugin.  */
 108 extern int plugin_init (struct plugin_name_args *plugin_info,
 109                         struct plugin_gcc_version *version);
 110
 111 /* Function type for a plugin callback routine.
 112
 113    GCC_DATA  - event-specific data provided by GCC
 114    USER_DATA - plugin-specific data provided by the plugin  */
 115
 116 typedef void (*plugin_callback_func) (void *gcc_data, void *user_data);
 117
 118 /* Called from the plugin's initialization code. Register a single callback.
 119    This function can be called multiple times.
 120
 121    PLUGIN_NAME - display name for this plugin
 122    EVENT       - which event the callback is for
 123    CALLBACK    - the callback to be called at the event
 124    USER_DATA   - plugin-provided data.
 125 */
 126
 127 /* Number of event ids / names registered so far.  */
 128
 129 extern int get_event_last (void);
 130
 131 int get_named_event_id (const char *name, enum insert_option insert);
 132
 133 /* This is also called without a callback routine for the
 134    PLUGIN_PASS_MANAGER_SETUP, PLUGIN_INFO, PLUGIN_REGISTER_GGC_ROOTS and
 135    PLUGIN_REGISTER_GGC_CACHES pseudo-events, with a specific user_data.
 136   */
 137
 138 extern void register_callback (const char *plugin_name,
 139                                int event,
 140                                plugin_callback_func callback,
 141                                void *user_data);
 142
 143 extern int unregister_callback (const char *plugin_name, int event);
 144
 145
 146 /* Retrieve the plugin directory name, as returned by the
 147    -fprint-file-name=plugin argument to the gcc program, which is the
 148    -iplugindir program argument to cc1.  */
 149 extern const char* default_plugin_dir_name (void);
 150
 151 #ifdef __cplusplus
 152 }
 153 #endif
 154
 155 /* In case the C++ compiler does name mangling for globals, declare
 156    plugin_is_GPL_compatible extern "C" so that a later definition
 157    in a plugin file will have this linkage.  */
 158 #ifdef __cplusplus
 159 extern "C" {
 160 #endif
 161 extern int plugin_is_GPL_compatible;
 162 #ifdef __cplusplus
 163 }
 164 #endif
 165
 166 #endif /* GCC_PLUGIN_H */