libcc1/libcc1.cc

   1 /* The library used by gdb.
   2    Copyright (C) 2014-2022 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 it under
   7 the terms of the GNU General Public License as published by the Free
   8 Software Foundation; either version 3, or (at your option) any later
   9 version.
  10
  11 GCC is distributed in the hope that it will be useful, but WITHOUT ANY
  12 WARRANTY; without even the implied warranty of MERCHANTABILITY or
  13 FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  14 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 #include <cc1plugin-config.h>
  21 #include <vector>
  22 #include <string>
  23 #include <sys/socket.h>
  24 #include <sys/types.h>
  25 #include <unistd.h>
  26 #include <sys/wait.h>
  27 #include <stdio.h>
  28 #include <errno.h>
  29 #include <sys/stat.h>
  30 #include <stdlib.h>
  31 #include "marshall.hh"
  32 #include "rpc.hh"
  33 #include "connection.hh"
  34 #include "names.hh"
  35 #include "callbacks.hh"
  36 #include "libiberty.h"
  37 #include "compiler-name.hh"
  38 #include "gcc-c-interface.h"
  39 #include "compiler.hh"
  40 #include "gdbctx.hh"
  41
  42 // The C compiler context that we hand back to our caller.
  43 struct libcc1 : public cc1_plugin::base_gdb_plugin<gcc_c_context>
  44 {
  45   explicit libcc1 (const gcc_c_fe_vtable *);
  46
  47   void add_callbacks () override;
  48
  49   gcc_c_oracle_function *binding_oracle = nullptr;
  50   gcc_c_symbol_address_function *address_oracle = nullptr;
  51   void *oracle_datum = nullptr;
  52 };
  53
  54 libcc1::libcc1 (const gcc_c_fe_vtable *cv)
  55   : cc1_plugin::base_gdb_plugin<gcc_c_context> ("libcc1plugin",
  56                                                 C_COMPILER_NAME,
  57                                                 GCC_C_FE_VERSION_1)
  58 {
  59   c_ops = cv;
  60 }
  61
  62 \f
  63
  64 // Enclose these functions in an anonymous namespace because they
  65 // shouldn't be exported, but they can't be static because they're
  66 // used as template arguments.
  67 namespace {
  68   // This is a wrapper function that is called by the RPC system and
  69   // that then forwards the call to the library user.  Note that the
  70   // return value is not used; the type cannot be 'void' due to
  71   // limitations in our simple RPC.
  72   int
  73   c_call_binding_oracle (cc1_plugin::connection *conn,
  74                          enum gcc_c_oracle_request request,
  75                          const char *identifier)
  76   {
  77     libcc1 *self = (libcc1 *) (((libcc1::local_connection *) conn)->back_ptr);
  78
  79     self->binding_oracle (self->oracle_datum, self, request, identifier);
  80     return 1;
  81   }
  82
  83   // This is a wrapper function that is called by the RPC system and
  84   // that then forwards the call to the library user.
  85   gcc_address
  86   c_call_symbol_address (cc1_plugin::connection *conn, const char *identifier)
  87   {
  88     libcc1 *self = (libcc1 *) (((libcc1::local_connection *) conn)->back_ptr);
  89
  90     return self->address_oracle (self->oracle_datum, self, identifier);
  91   }
  92 } /* anonymous namespace */
  93
  94 \f
  95
  96 static void
  97 set_callbacks (struct gcc_c_context *s,
  98                gcc_c_oracle_function *binding_oracle,
  99                gcc_c_symbol_address_function *address_oracle,
 100                void *datum)
 101 {
 102   libcc1 *self = (libcc1 *) s;
 103
 104   self->binding_oracle = binding_oracle;
 105   self->address_oracle = address_oracle;
 106   self->oracle_datum = datum;
 107 }
 108
 109 static const struct gcc_c_fe_vtable c_vtable =
 110 {
 111   GCC_C_FE_VERSION_0,
 112   set_callbacks,
 113
 114 #define GCC_METHOD0(R, N) \
 115   cc1_plugin::rpc<gcc_c_context, R, cc1_plugin::c::N>,
 116 #define GCC_METHOD1(R, N, A) \
 117   cc1_plugin::rpc<gcc_c_context, R, cc1_plugin::c::N, A>,
 118 #define GCC_METHOD2(R, N, A, B) \
 119   cc1_plugin::rpc<gcc_c_context, R, cc1_plugin::c::N, A, B>,
 120 #define GCC_METHOD3(R, N, A, B, C) \
 121   cc1_plugin::rpc<gcc_c_context, R, cc1_plugin::c::N, A, B, C>,
 122 #define GCC_METHOD4(R, N, A, B, C, D) \
 123   cc1_plugin::rpc<gcc_c_context, R, cc1_plugin::c::N, A, B, C, D>,
 124 #define GCC_METHOD5(R, N, A, B, C, D, E) \
 125   cc1_plugin::rpc<gcc_c_context, R, cc1_plugin::c::N, A, B, C, D, E>,
 126 #define GCC_METHOD7(R, N, A, B, C, D, E, F, G) \
 127   cc1_plugin::rpc<gcc_c_context, R, cc1_plugin::c::N, A, B, C, D, E, F, G>,
 128
 129 #include "gcc-c-fe.def"
 130
 131 #undef GCC_METHOD0
 132 #undef GCC_METHOD1
 133 #undef GCC_METHOD2
 134 #undef GCC_METHOD3
 135 #undef GCC_METHOD4
 136 #undef GCC_METHOD5
 137 #undef GCC_METHOD7
 138 };
 139
 140 \f
 141
 142 void
 143 libcc1::add_callbacks ()
 144 {
 145   cc1_plugin::callback_ftype *fun
 146     = cc1_plugin::invoker<int,
 147                           enum gcc_c_oracle_request,
 148                           const char *>::invoke<c_call_binding_oracle>;
 149   connection->add_callback ("binding_oracle", fun);
 150
 151   fun = cc1_plugin::invoker<gcc_address,
 152                             const char *>::invoke<c_call_symbol_address>;
 153   connection->add_callback ("address_oracle", fun);
 154 }
 155
 156 extern "C" gcc_c_fe_context_function gcc_c_fe_context;
 157
 158 #ifdef __GNUC__
 159 #pragma GCC visibility push(default)
 160 #endif
 161
 162 extern "C"
 163 struct gcc_c_context *
 164 gcc_c_fe_context (enum gcc_base_api_version base_version,
 165                   enum gcc_c_api_version c_version)
 166 {
 167   if ((base_version != GCC_FE_VERSION_0 && base_version != GCC_FE_VERSION_1)
 168       || (c_version != GCC_C_FE_VERSION_0 && c_version != GCC_C_FE_VERSION_1))
 169     return NULL;
 170
 171   return new libcc1 (&c_vtable);
 172 }