8fdffa48c5
This patch completes the transition of libcc1 from the use of separate template functions for different arities to the use of variadic functions. This is how I had wanted it to work from the very beginning, and is possible now with C++11. I had thought that variadic callbacks required C++17, but it turns out that the approach taken here is basically equivalent to std::apply -- just a bit wordier. libcc1 * rpc.hh (argument_wrapper) <get>: Replace cast operator. (argument_wrapper<T *>) <get>: Likewise. (unmarshall): Add std::tuple overloads. (callback): Remove. (class invoker): New. * libcp1plugin.cc (plugin_init): Update. * libcp1.cc (libcp1::add_callbacks): Update. * libcc1plugin.cc (plugin_init): Update. * libcc1.cc (libcc1::add_callbacks): Update. * connection.cc (cc1_plugin::connection::do_wait): Update.
173 lines
4.9 KiB
C++
173 lines
4.9 KiB
C++
/* The library used by gdb.
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Copyright (C) 2014-2021 Free Software Foundation, Inc.
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This file is part of GCC.
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GCC is free software; you can redistribute it and/or modify it under
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the terms of the GNU General Public License as published by the Free
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Software Foundation; either version 3, or (at your option) any later
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version.
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GCC is distributed in the hope that it will be useful, but WITHOUT ANY
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WARRANTY; without even the implied warranty of MERCHANTABILITY or
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FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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for more details.
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You should have received a copy of the GNU General Public License
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along with GCC; see the file COPYING3. If not see
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<http://www.gnu.org/licenses/>. */
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#include <cc1plugin-config.h>
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#include <vector>
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#include <string>
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#include <sys/socket.h>
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#include <sys/types.h>
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#include <unistd.h>
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#include <sys/wait.h>
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#include <stdio.h>
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#include <errno.h>
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#include <sys/stat.h>
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#include <stdlib.h>
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#include "marshall.hh"
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#include "rpc.hh"
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#include "connection.hh"
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#include "names.hh"
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#include "callbacks.hh"
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#include "libiberty.h"
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#include "compiler-name.hh"
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#include "gcc-c-interface.h"
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#include "compiler.hh"
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#include "gdbctx.hh"
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// The C compiler context that we hand back to our caller.
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struct libcc1 : public cc1_plugin::base_gdb_plugin<gcc_c_context>
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{
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explicit libcc1 (const gcc_c_fe_vtable *);
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void add_callbacks () override;
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gcc_c_oracle_function *binding_oracle = nullptr;
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gcc_c_symbol_address_function *address_oracle = nullptr;
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void *oracle_datum = nullptr;
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};
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libcc1::libcc1 (const gcc_c_fe_vtable *cv)
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: cc1_plugin::base_gdb_plugin<gcc_c_context> ("libcc1plugin",
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C_COMPILER_NAME,
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GCC_C_FE_VERSION_1)
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{
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c_ops = cv;
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}
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// Enclose these functions in an anonymous namespace because they
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// shouldn't be exported, but they can't be static because they're
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// used as template arguments.
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namespace {
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// This is a wrapper function that is called by the RPC system and
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// that then forwards the call to the library user. Note that the
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// return value is not used; the type cannot be 'void' due to
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// limitations in our simple RPC.
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int
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c_call_binding_oracle (cc1_plugin::connection *conn,
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enum gcc_c_oracle_request request,
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const char *identifier)
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{
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libcc1 *self = (libcc1 *) (((libcc1::local_connection *) conn)->back_ptr);
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self->binding_oracle (self->oracle_datum, self, request, identifier);
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return 1;
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}
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// This is a wrapper function that is called by the RPC system and
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// that then forwards the call to the library user.
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gcc_address
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c_call_symbol_address (cc1_plugin::connection *conn, const char *identifier)
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{
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libcc1 *self = (libcc1 *) (((libcc1::local_connection *) conn)->back_ptr);
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return self->address_oracle (self->oracle_datum, self, identifier);
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}
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} /* anonymous namespace */
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static void
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set_callbacks (struct gcc_c_context *s,
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gcc_c_oracle_function *binding_oracle,
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gcc_c_symbol_address_function *address_oracle,
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void *datum)
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{
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libcc1 *self = (libcc1 *) s;
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self->binding_oracle = binding_oracle;
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self->address_oracle = address_oracle;
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self->oracle_datum = datum;
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}
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static const struct gcc_c_fe_vtable c_vtable =
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{
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GCC_C_FE_VERSION_0,
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set_callbacks,
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#define GCC_METHOD0(R, N) \
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cc1_plugin::rpc<gcc_c_context, R, cc1_plugin::c::N>,
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#define GCC_METHOD1(R, N, A) \
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cc1_plugin::rpc<gcc_c_context, R, cc1_plugin::c::N, A>,
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#define GCC_METHOD2(R, N, A, B) \
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cc1_plugin::rpc<gcc_c_context, R, cc1_plugin::c::N, A, B>,
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#define GCC_METHOD3(R, N, A, B, C) \
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cc1_plugin::rpc<gcc_c_context, R, cc1_plugin::c::N, A, B, C>,
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#define GCC_METHOD4(R, N, A, B, C, D) \
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cc1_plugin::rpc<gcc_c_context, R, cc1_plugin::c::N, A, B, C, D>,
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#define GCC_METHOD5(R, N, A, B, C, D, E) \
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cc1_plugin::rpc<gcc_c_context, R, cc1_plugin::c::N, A, B, C, D, E>,
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#define GCC_METHOD7(R, N, A, B, C, D, E, F, G) \
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cc1_plugin::rpc<gcc_c_context, R, cc1_plugin::c::N, A, B, C, D, E, F, G>,
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#include "gcc-c-fe.def"
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#undef GCC_METHOD0
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#undef GCC_METHOD1
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#undef GCC_METHOD2
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#undef GCC_METHOD3
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#undef GCC_METHOD4
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#undef GCC_METHOD5
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#undef GCC_METHOD7
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};
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void
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libcc1::add_callbacks ()
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{
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cc1_plugin::callback_ftype *fun
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= cc1_plugin::invoker<int,
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enum gcc_c_oracle_request,
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const char *>::invoke<c_call_binding_oracle>;
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connection->add_callback ("binding_oracle", fun);
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fun = cc1_plugin::invoker<gcc_address,
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const char *>::invoke<c_call_symbol_address>;
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connection->add_callback ("address_oracle", fun);
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}
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extern "C" gcc_c_fe_context_function gcc_c_fe_context;
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#ifdef __GNUC__
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#pragma GCC visibility push(default)
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#endif
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extern "C"
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struct gcc_c_context *
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gcc_c_fe_context (enum gcc_base_api_version base_version,
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enum gcc_c_api_version c_version)
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{
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if ((base_version != GCC_FE_VERSION_0 && base_version != GCC_FE_VERSION_1)
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|| (c_version != GCC_C_FE_VERSION_0 && c_version != GCC_C_FE_VERSION_1))
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return NULL;
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return new libcc1 (&c_vtable);
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}
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