include/gcc-interface.h

   1 /* Generic interface between GCC and GDB
   2
   3    Copyright (C) 2014-2021 Free Software Foundation, Inc.
   4
   5    This file is part of GCC.
   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 #ifndef GCC_INTERFACE_H
  21 #define GCC_INTERFACE_H
  22
  23 /* This header defines the interface to the GCC API.  It must be both
  24    valid C and valid C++, because it is included by both programs.  */
  25
  26 #ifdef __cplusplus
  27 extern "C" {
  28 #endif
  29
  30 /* Opaque typedefs for objects passed through the interface.  */
  31
  32 typedef unsigned long long gcc_type;
  33 typedef unsigned long long gcc_decl;
  34
  35 /* An address in the inferior.  */
  36
  37 typedef unsigned long long gcc_address;
  38
  39 /* Forward declaration.  */
  40
  41 struct gcc_base_context;
  42
  43 /* Defined versions of the generic API.  */
  44
  45 enum gcc_base_api_version
  46 {
  47   GCC_FE_VERSION_0 = 0,
  48
  49   /* Deprecated methods set_arguments_v0 and compile_v0.  Added methods
  50      set_arguments, set_triplet_regexp, set_driver_filename, set_verbose and
  51      compile.  */
  52   GCC_FE_VERSION_1 = 1,
  53 };
  54
  55 /* The operations defined by the GCC base API.  This is the vtable for
  56    the real context structure which is passed around.
  57
  58    The "base" API is concerned with basics shared by all compiler
  59    front ends: setting command-line arguments, the file names, etc.
  60
  61    Front-end-specific interfaces inherit from this one.  */
  62
  63 struct gcc_base_vtable
  64 {
  65   /* The actual version implemented in this interface.  This field can
  66      be relied on not to move, so users can always check it if they
  67      desire.  The value is one of the gcc_base_api_version constants.
  68   */
  69
  70   unsigned int version;
  71
  72   /* Deprecated GCC_FE_VERSION_0 variant of the GCC_FE_VERSION_1
  73      methods set_triplet_regexp and set_arguments.  */
  74
  75   char *(*set_arguments_v0) (struct gcc_base_context *self,
  76                              const char *triplet_regexp,
  77                              int argc, char **argv);
  78
  79   /* Set the file name of the program to compile.  The string is
  80      copied by the method implementation, but the caller must
  81      guarantee that the file exists through the compilation.  */
  82
  83   void (*set_source_file) (struct gcc_base_context *self, const char *file);
  84
  85   /* Set a callback to use for printing error messages.  DATUM is
  86      passed through to the callback unchanged.  */
  87
  88   void (*set_print_callback) (struct gcc_base_context *self,
  89                               void (*print_function) (void *datum,
  90                                                       const char *message),
  91                               void *datum);
  92
  93   /* Deprecated GCC_FE_VERSION_0 variant of the GCC_FE_VERSION_1
  94      compile method.  GCC_FE_VERSION_0 version verbose parameter has
  95      been replaced by the set_verbose method.  */
  96
  97   int /* bool */ (*compile_v0) (struct gcc_base_context *self,
  98                                 const char *filename,
  99                                 int /* bool */ verbose);
 100
 101   /* Destroy this object.  */
 102
 103   void (*destroy) (struct gcc_base_context *self);
 104
 105   /* VERBOSE can be set to non-zero to cause GCC to print some
 106      information as it works.  Calling this method overrides its
 107      possible previous calls.
 108
 109      This method is only available since GCC_FE_VERSION_1.  */
 110
 111   void (*set_verbose) (struct gcc_base_context *self,
 112                        int /* bool */ verbose);
 113
 114   /* Perform the compilation.  FILENAME is the name of the resulting
 115      object file.  Either set_triplet_regexp or set_driver_filename must
 116      be called before.  Returns true on success, false on error.
 117
 118      This method is only available since GCC_FE_VERSION_1.  */
 119
 120   int /* bool */ (*compile) (struct gcc_base_context *self,
 121                              const char *filename);
 122
 123   /* Set the compiler's command-line options for the next compilation.
 124      The arguments are copied by GCC.  ARGV need not be
 125      NULL-terminated.  The arguments must be set separately for each
 126      compilation; that is, after a compile is requested, the
 127      previously-set arguments cannot be reused.
 128
 129      This returns NULL on success.  On failure, returns a malloc()d
 130      error message.  The caller is responsible for freeing it.
 131
 132      This method is only available since GCC_FE_VERSION_1.  */
 133
 134   char *(*set_arguments) (struct gcc_base_context *self,
 135                           int argc, char **argv);
 136
 137   /* Set TRIPLET_REGEXP as a regular expression that is used to match
 138      the configury triplet prefix to the compiler.  Calling this method
 139      overrides possible previous call of itself or set_driver_filename.
 140
 141      This returns NULL on success.  On failure, returns a malloc()d
 142      error message.  The caller is responsible for freeing it.
 143
 144      This method is only available since GCC_FE_VERSION_1.  */
 145
 146   char *(*set_triplet_regexp) (struct gcc_base_context *self,
 147                                const char *triplet_regexp);
 148
 149   /* DRIVER_FILENAME should be filename of the gcc compiler driver
 150      program.  It will be searched in PATH components like
 151      TRIPLET_REGEXP.  Calling this method overrides possible previous
 152      call of itself or set_triplet_regexp.
 153
 154      This returns NULL on success.  On failure, returns a malloc()d
 155      error message.  The caller is responsible for freeing it.
 156
 157      This method is only available since GCC_FE_VERSION_1.  */
 158
 159   char *(*set_driver_filename) (struct gcc_base_context *self,
 160                                 const char *driver_filename);
 161 };
 162
 163 /* The GCC object.  */
 164
 165 struct gcc_base_context
 166 {
 167   /* The virtual table.  */
 168
 169   const struct gcc_base_vtable *ops;
 170 };
 171
 172 /* An array of types used for creating function types in multiple
 173    languages.  */
 174
 175 struct gcc_type_array
 176 {
 177   /* Number of elements.  */
 178
 179   int n_elements;
 180
 181   /* The elements.  */
 182
 183   gcc_type *elements;
 184 };
 185
 186 /* The name of the dummy wrapper function generated by gdb.  */
 187
 188 #define GCC_FE_WRAPPER_FUNCTION "_gdb_expr"
 189
 190 #ifdef __cplusplus
 191 }
 192 #endif
 193
 194 #endif /* GCC_INTERFACE_H */