include/gcc-interface.h

   1 /* Generic interface between GCC and GDB
   2
   3    Copyright (C) 2014-2017 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 method compile_v0.  Added method set_verbose and compile.  */
  50   GCC_FE_VERSION_1 = 1,
  51 };
  52
  53 /* The operations defined by the GCC base API.  This is the vtable for
  54    the real context structure which is passed around.
  55
  56    The "base" API is concerned with basics shared by all compiler
  57    front ends: setting command-line arguments, the file names, etc.
  58
  59    Front-end-specific interfaces inherit from this one.  */
  60
  61 struct gcc_base_vtable
  62 {
  63   /* The actual version implemented in this interface.  This field can
  64      be relied on not to move, so users can always check it if they
  65      desire.  The value is one of the gcc_base_api_version constants.
  66   */
  67
  68   unsigned int version;
  69
  70   /* Set the compiler's command-line options for the next compilation.
  71      TRIPLET_REGEXP is a regular expression that is used to match the
  72      configury triplet prefix to the compiler.
  73      The arguments are copied by GCC.  ARGV need not be
  74      NULL-terminated.  The arguments must be set separately for each
  75      compilation; that is, after a compile is requested, the
  76      previously-set arguments cannot be reused.
  77
  78      This returns NULL on success.  On failure, returns a malloc()d
  79      error message.  The caller is responsible for freeing it.  */
  80
  81   char *(*set_arguments) (struct gcc_base_context *self,
  82                           const char *triplet_regexp,
  83                           int argc, char **argv);
  84
  85   /* Set the file name of the program to compile.  The string is
  86      copied by the method implementation, but the caller must
  87      guarantee that the file exists through the compilation.  */
  88
  89   void (*set_source_file) (struct gcc_base_context *self, const char *file);
  90
  91   /* Set a callback to use for printing error messages.  DATUM is
  92      passed through to the callback unchanged.  */
  93
  94   void (*set_print_callback) (struct gcc_base_context *self,
  95                               void (*print_function) (void *datum,
  96                                                       const char *message),
  97                               void *datum);
  98
  99   /* Deprecated GCC_FE_VERSION_0 variant of the GCC_FE_VERSION_1
 100      compile method.  GCC_FE_VERSION_0 version verbose parameter has
 101      been replaced by the set_verbose method.  */
 102
 103   int /* bool */ (*compile_v0) (struct gcc_base_context *self,
 104                                 const char *filename,
 105                                 int /* bool */ verbose);
 106
 107   /* Destroy this object.  */
 108
 109   void (*destroy) (struct gcc_base_context *self);
 110
 111   /* VERBOSE can be set to non-zero to cause GCC to print some
 112      information as it works.  Calling this method overrides its
 113      possible previous calls.
 114
 115      This method is only available since GCC_FE_VERSION_1.  */
 116
 117   void (*set_verbose) (struct gcc_base_context *self,
 118                        int /* bool */ verbose);
 119
 120   /* Perform the compilation.  FILENAME is the name of the resulting
 121      object file.  Either set_triplet_regexp or set_driver_filename must
 122      be called before.  Returns true on success, false on error.
 123
 124      This method is only available since GCC_FE_VERSION_1.  */
 125
 126   int /* bool */ (*compile) (struct gcc_base_context *self,
 127                              const char *filename);
 128 };
 129
 130 /* The GCC object.  */
 131
 132 struct gcc_base_context
 133 {
 134   /* The virtual table.  */
 135
 136   const struct gcc_base_vtable *ops;
 137 };
 138
 139 /* The name of the dummy wrapper function generated by gdb.  */
 140
 141 #define GCC_FE_WRAPPER_FUNCTION "_gdb_expr"
 142
 143 #ifdef __cplusplus
 144 }
 145 #endif
 146
 147 #endif /* GCC_INTERFACE_H */