675 lines
16 KiB
C++
675 lines
16 KiB
C++
/* The library used by gdb.
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Copyright (C) 2014-2018 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 <sstream>
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#include "marshall-c.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 "xregex.h"
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#include "findcomp.hh"
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#include "compiler-name.hh"
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#include "intl.h"
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struct libcc1;
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class libcc1_connection;
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// The C compiler context that we hand back to our caller.
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struct libcc1 : public gcc_c_context
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{
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libcc1 (const gcc_base_vtable *, const gcc_c_fe_vtable *);
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~libcc1 ();
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// A convenience function to print something.
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void print (const char *str)
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{
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this->print_function (this->print_datum, str);
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}
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libcc1_connection *connection;
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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 *oracle_datum;
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void (*print_function) (void *datum, const char *message);
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void *print_datum;
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std::vector<std::string> args;
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std::string source_file;
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/* Non-zero as an equivalent to gcc driver option "-v". */
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bool verbose;
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/* Compiler to set by set_triplet_regexp or set_driver_filename. */
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class compiler
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{
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protected:
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libcc1 *self_;
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public:
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compiler (libcc1 *self) : self_ (self)
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{
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}
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virtual char *find (std::string &compiler) const;
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virtual ~compiler ()
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{
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}
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} *compilerp;
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/* Compiler to set by set_triplet_regexp. */
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class compiler_triplet_regexp : public compiler
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{
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private:
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std::string triplet_regexp_;
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public:
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virtual char *find (std::string &compiler) const;
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compiler_triplet_regexp (libcc1 *self, std::string triplet_regexp)
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: compiler (self), triplet_regexp_ (triplet_regexp)
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{
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}
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virtual ~compiler_triplet_regexp ()
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{
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}
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};
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/* Compiler to set by set_driver_filename. */
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class compiler_driver_filename : public compiler
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{
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private:
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std::string driver_filename_;
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public:
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virtual char *find (std::string &compiler) const;
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compiler_driver_filename (libcc1 *self, std::string driver_filename)
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: compiler (self), driver_filename_ (driver_filename)
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{
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}
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virtual ~compiler_driver_filename ()
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{
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}
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};
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};
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// A local subclass of connection that holds a back-pointer to the
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// gcc_c_context object that we provide to our caller.
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class libcc1_connection : public cc1_plugin::connection
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{
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public:
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libcc1_connection (int fd, int aux_fd, libcc1 *b)
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: connection (fd, aux_fd),
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back_ptr (b)
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{
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}
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virtual void print (const char *buf)
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{
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back_ptr->print (buf);
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}
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libcc1 *back_ptr;
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};
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libcc1::libcc1 (const gcc_base_vtable *v,
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const gcc_c_fe_vtable *cv)
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: connection (NULL),
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binding_oracle (NULL),
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address_oracle (NULL),
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oracle_datum (NULL),
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print_function (NULL),
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print_datum (NULL),
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args (),
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source_file (),
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verbose (false),
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compilerp (new libcc1::compiler (this))
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{
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base.ops = v;
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c_ops = cv;
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}
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libcc1::~libcc1 ()
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{
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delete connection;
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delete compilerp;
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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_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_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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// Instances of these rpc<> template functions are installed into the
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// "c_vtable". These functions are parameterized by type and method
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// name and forward the call via the connection.
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template<typename R, const char *&NAME>
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R rpc (struct gcc_c_context *s)
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{
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libcc1 *self = (libcc1 *) s;
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R result;
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if (!cc1_plugin::call (self->connection, NAME, &result))
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return 0;
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return result;
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}
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template<typename R, const char *&NAME, typename A>
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R rpc (struct gcc_c_context *s, A arg)
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{
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libcc1 *self = (libcc1 *) s;
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R result;
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if (!cc1_plugin::call (self->connection, NAME, &result, arg))
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return 0;
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return result;
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}
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template<typename R, const char *&NAME, typename A1, typename A2>
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R rpc (struct gcc_c_context *s, A1 arg1, A2 arg2)
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{
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libcc1 *self = (libcc1 *) s;
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R result;
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if (!cc1_plugin::call (self->connection, NAME, &result, arg1, arg2))
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return 0;
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return result;
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}
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template<typename R, const char *&NAME, typename A1, typename A2, typename A3>
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R rpc (struct gcc_c_context *s, A1 arg1, A2 arg2, A3 arg3)
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{
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libcc1 *self = (libcc1 *) s;
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R result;
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if (!cc1_plugin::call (self->connection, NAME, &result, arg1, arg2, arg3))
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return 0;
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return result;
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}
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template<typename R, const char *&NAME, typename A1, typename A2, typename A3,
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typename A4>
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R rpc (struct gcc_c_context *s, A1 arg1, A2 arg2, A3 arg3, A4 arg4)
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{
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libcc1 *self = (libcc1 *) s;
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R result;
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if (!cc1_plugin::call (self->connection, NAME, &result, arg1, arg2, arg3,
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arg4))
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return 0;
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return result;
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}
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template<typename R, const char *&NAME, typename A1, typename A2, typename A3,
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typename A4, typename A5>
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R rpc (struct gcc_c_context *s, A1 arg1, A2 arg2, A3 arg3, A4 arg4, A5 arg5)
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{
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libcc1 *self = (libcc1 *) s;
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R result;
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if (!cc1_plugin::call (self->connection, NAME, &result, arg1, arg2, arg3,
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arg4, arg5))
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return 0;
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return result;
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}
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template<typename R, const char *&NAME, typename A1, typename A2, typename A3,
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typename A4, typename A5, typename A6, typename A7>
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R rpc (struct gcc_c_context *s, A1 arg1, A2 arg2, A3 arg3, A4 arg4, A5 arg5,
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A6 arg6, A7 arg7)
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{
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libcc1 *self = (libcc1 *) s;
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R result;
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if (!cc1_plugin::call (self->connection, NAME, &result, arg1, arg2, arg3,
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arg4, arg5, arg6, arg7))
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return 0;
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return result;
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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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rpc<R, cc1_plugin::c::N>,
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#define GCC_METHOD1(R, N, A) \
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rpc<R, cc1_plugin::c::N, A>,
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#define GCC_METHOD2(R, N, A, B) \
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rpc<R, cc1_plugin::c::N, A, B>,
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#define GCC_METHOD3(R, N, A, B, C) \
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rpc<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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rpc<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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rpc<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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rpc<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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// Construct an appropriate regexp to match the compiler name.
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static std::string
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make_regexp (const char *triplet_regexp, const char *compiler)
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{
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std::stringstream buf;
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buf << "^" << triplet_regexp << "-";
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// Quote the compiler name in case it has something funny in it.
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for (const char *p = compiler; *p; ++p)
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{
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switch (*p)
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{
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case '.':
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case '^':
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case '$':
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case '*':
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case '+':
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case '?':
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case '(':
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case ')':
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case '[':
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case '{':
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case '\\':
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case '|':
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buf << '\\';
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break;
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}
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buf << *p;
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}
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buf << "$";
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return buf.str ();
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}
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static void
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libcc1_set_verbose (struct gcc_base_context *s, int /* bool */ verbose)
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{
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libcc1 *self = (libcc1 *) s;
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self->verbose = verbose != 0;
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}
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char *
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libcc1::compiler::find (std::string &compiler ATTRIBUTE_UNUSED) const
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{
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return xstrdup (_("Compiler has not been specified"));
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}
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char *
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libcc1::compiler_triplet_regexp::find (std::string &compiler) const
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{
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std::string rx = make_regexp (triplet_regexp_.c_str (), C_COMPILER_NAME);
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if (self_->verbose)
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fprintf (stderr, _("searching for compiler matching regex %s\n"),
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rx.c_str());
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regex_t triplet;
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int code = regcomp (&triplet, rx.c_str (), REG_EXTENDED | REG_NOSUB);
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if (code != 0)
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{
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size_t len = regerror (code, &triplet, NULL, 0);
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char err[len];
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regerror (code, &triplet, err, len);
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return concat ("Could not compile regexp \"",
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rx.c_str (),
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"\": ",
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err,
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(char *) NULL);
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}
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if (!find_compiler (triplet, &compiler))
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{
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regfree (&triplet);
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return concat ("Could not find a compiler matching \"",
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rx.c_str (),
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"\"",
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(char *) NULL);
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}
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regfree (&triplet);
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if (self_->verbose)
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fprintf (stderr, _("found compiler %s\n"), compiler.c_str());
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return NULL;
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}
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char *
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libcc1::compiler_driver_filename::find (std::string &compiler) const
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{
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// Simulate fnotice by fprintf.
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if (self_->verbose)
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fprintf (stderr, _("using explicit compiler filename %s\n"),
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driver_filename_.c_str());
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compiler = driver_filename_;
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return NULL;
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}
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static char *
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libcc1_set_arguments (struct gcc_base_context *s,
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int argc, char **argv)
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{
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libcc1 *self = (libcc1 *) s;
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std::string compiler;
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char *errmsg = self->compilerp->find (compiler);
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if (errmsg != NULL)
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return errmsg;
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self->args.push_back (compiler);
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for (int i = 0; i < argc; ++i)
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self->args.push_back (argv[i]);
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return NULL;
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}
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static char *
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libcc1_set_triplet_regexp (struct gcc_base_context *s,
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const char *triplet_regexp)
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{
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libcc1 *self = (libcc1 *) s;
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delete self->compilerp;
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self->compilerp = new libcc1::compiler_triplet_regexp (self, triplet_regexp);
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return NULL;
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}
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static char *
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libcc1_set_driver_filename (struct gcc_base_context *s,
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const char *driver_filename)
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{
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libcc1 *self = (libcc1 *) s;
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delete self->compilerp;
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self->compilerp = new libcc1::compiler_driver_filename (self,
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driver_filename);
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return NULL;
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}
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static char *
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libcc1_set_arguments_v0 (struct gcc_base_context *s,
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const char *triplet_regexp,
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int argc, char **argv)
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{
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char *errmsg = libcc1_set_triplet_regexp (s, triplet_regexp);
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if (errmsg != NULL)
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return errmsg;
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return libcc1_set_arguments (s, argc, argv);
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}
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static void
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libcc1_set_source_file (struct gcc_base_context *s,
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const char *file)
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{
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libcc1 *self = (libcc1 *) s;
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self->source_file = file;
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}
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static void
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libcc1_set_print_callback (struct gcc_base_context *s,
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void (*print_function) (void *datum,
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const char *message),
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void *datum)
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{
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libcc1 *self = (libcc1 *) s;
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self->print_function = print_function;
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self->print_datum = datum;
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}
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static int
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fork_exec (libcc1 *self, char **argv, int spair_fds[2], int stderr_fds[2])
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{
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pid_t child_pid = fork ();
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if (child_pid == -1)
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{
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close (spair_fds[0]);
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close (spair_fds[1]);
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close (stderr_fds[0]);
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close (stderr_fds[1]);
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return 0;
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}
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if (child_pid == 0)
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{
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// Child.
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dup2 (stderr_fds[1], 1);
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dup2 (stderr_fds[1], 2);
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close (stderr_fds[0]);
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close (stderr_fds[1]);
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close (spair_fds[0]);
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execvp (argv[0], argv);
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_exit (127);
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}
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else
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{
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// Parent.
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close (spair_fds[1]);
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close (stderr_fds[1]);
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cc1_plugin::status result = cc1_plugin::FAIL;
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if (self->connection->send ('H')
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&& ::cc1_plugin::marshall (self->connection, GCC_C_FE_VERSION_1))
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result = self->connection->wait_for_query ();
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close (spair_fds[0]);
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close (stderr_fds[0]);
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while (true)
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{
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int status;
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if (waitpid (child_pid, &status, 0) == -1)
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{
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if (errno != EINTR)
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return 0;
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}
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if (!WIFEXITED (status) || WEXITSTATUS (status) != 0)
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return 0;
|
||
break;
|
||
}
|
||
|
||
if (!result)
|
||
return 0;
|
||
return 1;
|
||
}
|
||
}
|
||
|
||
static int
|
||
libcc1_compile (struct gcc_base_context *s,
|
||
const char *filename)
|
||
{
|
||
libcc1 *self = (libcc1 *) s;
|
||
|
||
int fds[2];
|
||
if (socketpair (AF_UNIX, SOCK_STREAM, 0, fds) != 0)
|
||
{
|
||
self->print ("could not create socketpair\n");
|
||
return 0;
|
||
}
|
||
|
||
int stderr_fds[2];
|
||
if (pipe (stderr_fds) != 0)
|
||
{
|
||
self->print ("could not create pipe\n");
|
||
close (fds[0]);
|
||
close (fds[1]);
|
||
return 0;
|
||
}
|
||
|
||
self->args.push_back ("-fplugin=libcc1plugin");
|
||
char buf[100];
|
||
if (snprintf (buf, sizeof (buf), "-fplugin-arg-libcc1plugin-fd=%d", fds[1])
|
||
>= (long) sizeof (buf))
|
||
abort ();
|
||
self->args.push_back (buf);
|
||
|
||
self->args.push_back (self->source_file);
|
||
self->args.push_back ("-c");
|
||
self->args.push_back ("-o");
|
||
self->args.push_back (filename);
|
||
if (self->verbose)
|
||
self->args.push_back ("-v");
|
||
|
||
self->connection = new libcc1_connection (fds[0], stderr_fds[0], self);
|
||
|
||
cc1_plugin::callback_ftype *fun
|
||
= cc1_plugin::callback<int,
|
||
enum gcc_c_oracle_request,
|
||
const char *,
|
||
c_call_binding_oracle>;
|
||
self->connection->add_callback ("binding_oracle", fun);
|
||
|
||
fun = cc1_plugin::callback<gcc_address,
|
||
const char *,
|
||
c_call_symbol_address>;
|
||
self->connection->add_callback ("address_oracle", fun);
|
||
|
||
char **argv = new (std::nothrow) char *[self->args.size () + 1];
|
||
if (argv == NULL)
|
||
return 0;
|
||
|
||
for (unsigned int i = 0; i < self->args.size (); ++i)
|
||
argv[i] = const_cast<char *> (self->args[i].c_str ());
|
||
argv[self->args.size ()] = NULL;
|
||
|
||
return fork_exec (self, argv, fds, stderr_fds);
|
||
}
|
||
|
||
static int
|
||
libcc1_compile_v0 (struct gcc_base_context *s, const char *filename,
|
||
int verbose)
|
||
{
|
||
libcc1_set_verbose (s, verbose);
|
||
return libcc1_compile (s, filename);
|
||
}
|
||
|
||
static void
|
||
libcc1_destroy (struct gcc_base_context *s)
|
||
{
|
||
libcc1 *self = (libcc1 *) s;
|
||
|
||
delete self;
|
||
}
|
||
|
||
static const struct gcc_base_vtable vtable =
|
||
{
|
||
GCC_FE_VERSION_1,
|
||
libcc1_set_arguments_v0,
|
||
libcc1_set_source_file,
|
||
libcc1_set_print_callback,
|
||
libcc1_compile_v0,
|
||
libcc1_destroy,
|
||
libcc1_set_verbose,
|
||
libcc1_compile,
|
||
libcc1_set_arguments,
|
||
libcc1_set_triplet_regexp,
|
||
libcc1_set_driver_filename,
|
||
};
|
||
|
||
extern "C" gcc_c_fe_context_function gcc_c_fe_context;
|
||
|
||
#ifdef __GNUC__
|
||
#pragma GCC visibility push(default)
|
||
#endif
|
||
|
||
extern "C"
|
||
struct gcc_c_context *
|
||
gcc_c_fe_context (enum gcc_base_api_version base_version,
|
||
enum gcc_c_api_version c_version)
|
||
{
|
||
if ((base_version != GCC_FE_VERSION_0 && base_version != GCC_FE_VERSION_1)
|
||
|| (c_version != GCC_C_FE_VERSION_0 && c_version != GCC_C_FE_VERSION_1))
|
||
return NULL;
|
||
|
||
return new libcc1 (&vtable, &c_vtable);
|
||
}
|