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 #ifndef IN_GCC
  24 #define IN_GCC
  25 #endif
  26
  27 #include "config.h"
  28 #include "system.h"
  29
  30 /* Event names.  Keep in sync with plugin_event_name[].  */
  31 enum plugin_event
  32 {
  33   PLUGIN_PASS_MANAGER_SETUP,    /* To hook into pass manager.  */
  34   PLUGIN_FINISH_TYPE,           /* After finishing parsing a type.  */
  35   PLUGIN_FINISH_UNIT,           /* Useful for summary processing.  */
  36   PLUGIN_CXX_CP_PRE_GENERICIZE, /* Allows to see low level AST in C++ FE.  */
  37   PLUGIN_FINISH,                /* Called before GCC exits.  */
  38   PLUGIN_INFO,                  /* Information about the plugin. */
  39   PLUGIN_GGC_START,             /* Called at start of GCC Garbage Collection. */
  40   PLUGIN_GGC_MARKING,           /* Extend the GGC marking. */
  41   PLUGIN_GGC_END,               /* Called at end of GGC. */
  42   PLUGIN_REGISTER_GGC_ROOTS,    /* Register an extra GGC root table. */
  43   PLUGIN_ATTRIBUTES,            /* Called during attribute registration.  */
  44   PLUGIN_START_UNIT,            /* Called before processing a translation unit.  */
  45   PLUGIN_EVENT_LAST             /* Dummy event used for indexing callback
  46                                    array.  */
  47 };
  48
  49 extern const char *plugin_event_name[];
  50
  51 struct plugin_argument
  52 {
  53   char *key;    /* key of the argument.  */
  54   char *value;  /* value is optional and can be NULL.  */
  55 };
  56
  57 enum pass_positioning_ops
  58 {
  59   PASS_POS_INSERT_AFTER,  /* Insert after the reference pass.  */
  60   PASS_POS_INSERT_BEFORE, /* Insert before the reference pass.  */
  61   PASS_POS_REPLACE        /* Replace the reference pass.  */
  62 };
  63
  64 struct plugin_pass
  65 {
  66   struct opt_pass *pass;            /* New pass provided by the plugin.  */
  67   const char *reference_pass_name;  /* Name of the reference pass for hooking
  68                                        up the new pass.  */
  69   int ref_pass_instance_number;     /* Insert the pass at the specified
  70                                        instance number of the reference pass.
  71                                        Do it for every instance if it is 0.  */
  72   enum pass_positioning_ops pos_op; /* how to insert the new pass.  */
  73 };
  74
  75 /* Additional information about the plugin. Used by --help and --version. */
  76
  77 struct plugin_info
  78 {
  79   const char *version;
  80   const char *help;
  81 };
  82
  83 /* Represents the gcc version. Used to avoid using an incompatible plugin. */
  84
  85 struct plugin_gcc_version
  86 {
  87   const char *basever;
  88   const char *datestamp;
  89   const char *devphase;
  90   const char *revision;
  91   const char *configuration_arguments;
  92 };
  93
  94 /* Object that keeps track of the plugin name and its arguments. */
  95 struct plugin_name_args
  96 {
  97   char *base_name;              /* Short name of the plugin (filename without
  98                                    .so suffix). */
  99   const char *full_name;        /* Path to the plugin as specified with
 100                                    -fplugin=. */
 101   int argc;                     /* Number of arguments specified with
 102                                    -fplugin-arg-... */
 103   struct plugin_argument *argv; /* Array of ARGC key-value pairs. */
 104   const char *version;          /* Version string provided by plugin. */
 105   const char *help;             /* Help string provided by plugin. */
 106 };
 107
 108 /* The default version check. Compares every field in VERSION. */
 109
 110 extern bool plugin_default_version_check (struct plugin_gcc_version *,
 111                                           struct plugin_gcc_version *);
 112
 113 /* Function type for the plugin initialization routine. Each plugin module
 114    should define this as an externally-visible function with name
 115    "plugin_init."
 116
 117    PLUGIN_INFO - plugin invocation information.
 118    VERSION     - the plugin_gcc_version symbol of GCC.
 119
 120    Returns 0 if initialization finishes successfully.  */
 121
 122 typedef int (*plugin_init_func) (struct plugin_name_args *plugin_info,
 123                                  struct plugin_gcc_version *version);
 124
 125 /* Declaration for "plugin_init" function so that it doesn't need to be
 126    duplicated in every plugin.  */
 127 extern int plugin_init (struct plugin_name_args *plugin_info,
 128                         struct plugin_gcc_version *version);
 129
 130 /* Function type for a plugin callback routine.
 131
 132    GCC_DATA  - event-specific data provided by GCC
 133    USER_DATA - plugin-specific data provided by the plugin  */
 134
 135 typedef void (*plugin_callback_func) (void *gcc_data, void *user_data);
 136
 137 /* Called from the plugin's initialization code. Register a single callback.
 138    This function can be called multiple times.
 139
 140    PLUGIN_NAME - display name for this plugin
 141    EVENT       - which event the callback is for
 142    CALLBACK    - the callback to be called at the event
 143    USER_DATA   - plugin-provided data.
 144 */
 145
 146 /* This is also called without a callback routine for the
 147    PLUGIN_PASS_MANAGER_SETUP, PLUGIN_INFO, PLUGIN_REGISTER_GGC_ROOTS
 148    pseudo-events, with a specific user_data.
 149   */
 150
 151 extern void register_callback (const char *plugin_name,
 152                                enum plugin_event event,
 153                                plugin_callback_func callback,
 154                                void *user_data);
 155
 156 #endif /* GCC_PLUGIN_H */