/* Generic interface between GCC and GDB

  Copyright (C) 2014-2024 Free Software Foundation, Inc.

  This file is part of GCC.

  This program is free software; you can redistribute it and/or modify
  it under the terms of the GNU General Public License as published by
  the Free Software Foundation; either version 3 of the License, or
  (at your option) any later version.

  This program is distributed in the hope that it will be useful,
  but WITHOUT ANY WARRANTY; without even the implied warranty of
  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  GNU General Public License for more details.

  You should have received a copy of the GNU General Public License
  along with this program.  If not, see <http://www.gnu.org/licenses/>.  */

#ifndef GCC_INTERFACE_H
#define GCC_INTERFACE_H

/* This header defines the interface to the GCC API.  It must be both
  valid C and valid C++, because it is included by both programs.  */

#ifdef __cplusplus
extern "C" {
#endif

/* Opaque typedefs for objects passed through the interface.  */

typedef unsigned long long gcc_type;
typedef unsigned long long gcc_decl;

/* An address in the inferior.  */

typedef unsigned long long gcc_address;

/* Forward declaration.  */

struct gcc_base_context;

/* Defined versions of the generic API.  */

enum gcc_base_api_version
{
 GCC_FE_VERSION_0 = 0,

 /* Deprecated methods set_arguments_v0 and compile_v0.  Added methods
    set_arguments, set_triplet_regexp, set_driver_filename, set_verbose and
    compile.  */
 GCC_FE_VERSION_1 = 1,
};

/* The operations defined by the GCC base API.  This is the vtable for
  the real context structure which is passed around.

  The "base" API is concerned with basics shared by all compiler
  front ends: setting command-line arguments, the file names, etc.

  Front-end-specific interfaces inherit from this one.  */

struct gcc_base_vtable
{
 /* The actual version implemented in this interface.  This field can
    be relied on not to move, so users can always check it if they
    desire.  The value is one of the gcc_base_api_version constants.
 */

 unsigned int version;

 /* Deprecated GCC_FE_VERSION_0 variant of the GCC_FE_VERSION_1
    methods set_triplet_regexp and set_arguments.  */

 char *(*set_arguments_v0) (struct gcc_base_context *self,
                            const char *triplet_regexp,
                            int argc, char **argv);

 /* Set the file name of the program to compile.  The string is
    copied by the method implementation, but the caller must
    guarantee that the file exists through the compilation.  */

 void (*set_source_file) (struct gcc_base_context *self, const char *file);

 /* Set a callback to use for printing error messages.  DATUM is
    passed through to the callback unchanged.  */

 void (*set_print_callback) (struct gcc_base_context *self,
                             void (*print_function) (void *datum,
                                                     const char *message),
                             void *datum);

 /* Deprecated GCC_FE_VERSION_0 variant of the GCC_FE_VERSION_1
    compile method.  GCC_FE_VERSION_0 version verbose parameter has
    been replaced by the set_verbose method.  */

 int /* bool */ (*compile_v0) (struct gcc_base_context *self,
                               const char *filename,
                               int /* bool */ verbose);

 /* Destroy this object.  */

 void (*destroy) (struct gcc_base_context *self);

 /* VERBOSE can be set to non-zero to cause GCC to print some
    information as it works.  Calling this method overrides its
    possible previous calls.

    This method is only available since GCC_FE_VERSION_1.  */

 void (*set_verbose) (struct gcc_base_context *self,
                      int /* bool */ verbose);

 /* Perform the compilation.  FILENAME is the name of the resulting
    object file.  Either set_triplet_regexp or set_driver_filename must
    be called before.  Returns true on success, false on error.

    This method is only available since GCC_FE_VERSION_1.  */

 int /* bool */ (*compile) (struct gcc_base_context *self,
                            const char *filename);

 /* Set the compiler's command-line options for the next compilation.
    The arguments are copied by GCC.  ARGV need not be
    NULL-terminated.  The arguments must be set separately for each
    compilation; that is, after a compile is requested, the
    previously-set arguments cannot be reused.

    This returns NULL on success.  On failure, returns a malloc()d
    error message.  The caller is responsible for freeing it.

    This method is only available since GCC_FE_VERSION_1.  */

 char *(*set_arguments) (struct gcc_base_context *self,
                         int argc, char **argv);

 /* Set TRIPLET_REGEXP as a regular expression that is used to match
    the configury triplet prefix to the compiler.  Calling this method
    overrides possible previous call of itself or set_driver_filename.

    This returns NULL on success.  On failure, returns a malloc()d
    error message.  The caller is responsible for freeing it.

    This method is only available since GCC_FE_VERSION_1.  */

 char *(*set_triplet_regexp) (struct gcc_base_context *self,
                              const char *triplet_regexp);

 /* DRIVER_FILENAME should be filename of the gcc compiler driver
    program.  It will be searched in PATH components like
    TRIPLET_REGEXP.  Calling this method overrides possible previous
    call of itself or set_triplet_regexp.

    This returns NULL on success.  On failure, returns a malloc()d
    error message.  The caller is responsible for freeing it.

    This method is only available since GCC_FE_VERSION_1.  */

 char *(*set_driver_filename) (struct gcc_base_context *self,
                               const char *driver_filename);
};

/* The GCC object.  */

struct gcc_base_context
{
 /* The virtual table.  */

 const struct gcc_base_vtable *ops;
};

/* An array of types used for creating function types in multiple
  languages.  */

struct gcc_type_array
{
 /* Number of elements.  */

 int n_elements;

 /* The elements.  */

 gcc_type *elements;
};

/* The name of the dummy wrapper function generated by gdb.  */

#define GCC_FE_WRAPPER_FUNCTION "_gdb_expr"

#ifdef __cplusplus
}
#endif

#endif /* GCC_INTERFACE_H */

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