mirror of
https://github.com/autc04/Retro68.git
synced 2024-11-20 10:42:21 +00:00
675 lines
16 KiB
C++
675 lines
16 KiB
C++
/* The library used by gdb.
|
||
Copyright (C) 2014-2019 Free Software Foundation, Inc.
|
||
|
||
This file is part of GCC.
|
||
|
||
GCC 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, or (at your option) any later
|
||
version.
|
||
|
||
GCC 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 GCC; see the file COPYING3. If not see
|
||
<http://www.gnu.org/licenses/>. */
|
||
|
||
#include <cc1plugin-config.h>
|
||
#include <vector>
|
||
#include <string>
|
||
#include <sys/socket.h>
|
||
#include <sys/types.h>
|
||
#include <unistd.h>
|
||
#include <sys/wait.h>
|
||
#include <stdio.h>
|
||
#include <errno.h>
|
||
#include <sys/stat.h>
|
||
#include <stdlib.h>
|
||
#include <sstream>
|
||
#include "marshall-c.hh"
|
||
#include "rpc.hh"
|
||
#include "connection.hh"
|
||
#include "names.hh"
|
||
#include "callbacks.hh"
|
||
#include "libiberty.h"
|
||
#include "xregex.h"
|
||
#include "findcomp.hh"
|
||
#include "compiler-name.hh"
|
||
#include "intl.h"
|
||
|
||
struct libcc1;
|
||
|
||
class libcc1_connection;
|
||
|
||
// The C compiler context that we hand back to our caller.
|
||
struct libcc1 : public gcc_c_context
|
||
{
|
||
libcc1 (const gcc_base_vtable *, const gcc_c_fe_vtable *);
|
||
~libcc1 ();
|
||
|
||
// A convenience function to print something.
|
||
void print (const char *str)
|
||
{
|
||
this->print_function (this->print_datum, str);
|
||
}
|
||
|
||
libcc1_connection *connection;
|
||
|
||
gcc_c_oracle_function *binding_oracle;
|
||
gcc_c_symbol_address_function *address_oracle;
|
||
void *oracle_datum;
|
||
|
||
void (*print_function) (void *datum, const char *message);
|
||
void *print_datum;
|
||
|
||
std::vector<std::string> args;
|
||
std::string source_file;
|
||
|
||
/* Non-zero as an equivalent to gcc driver option "-v". */
|
||
bool verbose;
|
||
|
||
/* Compiler to set by set_triplet_regexp or set_driver_filename. */
|
||
class compiler
|
||
{
|
||
protected:
|
||
libcc1 *self_;
|
||
public:
|
||
compiler (libcc1 *self) : self_ (self)
|
||
{
|
||
}
|
||
virtual char *find (std::string &compiler) const;
|
||
virtual ~compiler ()
|
||
{
|
||
}
|
||
} *compilerp;
|
||
|
||
/* Compiler to set by set_triplet_regexp. */
|
||
class compiler_triplet_regexp : public compiler
|
||
{
|
||
private:
|
||
std::string triplet_regexp_;
|
||
public:
|
||
virtual char *find (std::string &compiler) const;
|
||
compiler_triplet_regexp (libcc1 *self, std::string triplet_regexp)
|
||
: compiler (self), triplet_regexp_ (triplet_regexp)
|
||
{
|
||
}
|
||
virtual ~compiler_triplet_regexp ()
|
||
{
|
||
}
|
||
};
|
||
|
||
/* Compiler to set by set_driver_filename. */
|
||
class compiler_driver_filename : public compiler
|
||
{
|
||
private:
|
||
std::string driver_filename_;
|
||
public:
|
||
virtual char *find (std::string &compiler) const;
|
||
compiler_driver_filename (libcc1 *self, std::string driver_filename)
|
||
: compiler (self), driver_filename_ (driver_filename)
|
||
{
|
||
}
|
||
virtual ~compiler_driver_filename ()
|
||
{
|
||
}
|
||
};
|
||
};
|
||
|
||
// A local subclass of connection that holds a back-pointer to the
|
||
// gcc_c_context object that we provide to our caller.
|
||
class libcc1_connection : public cc1_plugin::connection
|
||
{
|
||
public:
|
||
|
||
libcc1_connection (int fd, int aux_fd, libcc1 *b)
|
||
: connection (fd, aux_fd),
|
||
back_ptr (b)
|
||
{
|
||
}
|
||
|
||
virtual void print (const char *buf)
|
||
{
|
||
back_ptr->print (buf);
|
||
}
|
||
|
||
libcc1 *back_ptr;
|
||
};
|
||
|
||
libcc1::libcc1 (const gcc_base_vtable *v,
|
||
const gcc_c_fe_vtable *cv)
|
||
: connection (NULL),
|
||
binding_oracle (NULL),
|
||
address_oracle (NULL),
|
||
oracle_datum (NULL),
|
||
print_function (NULL),
|
||
print_datum (NULL),
|
||
args (),
|
||
source_file (),
|
||
verbose (false),
|
||
compilerp (new libcc1::compiler (this))
|
||
{
|
||
base.ops = v;
|
||
c_ops = cv;
|
||
}
|
||
|
||
libcc1::~libcc1 ()
|
||
{
|
||
delete connection;
|
||
delete compilerp;
|
||
}
|
||
|
||
|
||
|
||
// Enclose these functions in an anonymous namespace because they
|
||
// shouldn't be exported, but they can't be static because they're
|
||
// used as template arguments.
|
||
namespace {
|
||
// This is a wrapper function that is called by the RPC system and
|
||
// that then forwards the call to the library user. Note that the
|
||
// return value is not used; the type cannot be 'void' due to
|
||
// limitations in our simple RPC.
|
||
int
|
||
c_call_binding_oracle (cc1_plugin::connection *conn,
|
||
enum gcc_c_oracle_request request,
|
||
const char *identifier)
|
||
{
|
||
libcc1 *self = ((libcc1_connection *) conn)->back_ptr;
|
||
|
||
self->binding_oracle (self->oracle_datum, self, request, identifier);
|
||
return 1;
|
||
}
|
||
|
||
// This is a wrapper function that is called by the RPC system and
|
||
// that then forwards the call to the library user.
|
||
gcc_address
|
||
c_call_symbol_address (cc1_plugin::connection *conn, const char *identifier)
|
||
{
|
||
libcc1 *self = ((libcc1_connection *) conn)->back_ptr;
|
||
|
||
return self->address_oracle (self->oracle_datum, self, identifier);
|
||
}
|
||
} /* anonymous namespace */
|
||
|
||
|
||
|
||
static void
|
||
set_callbacks (struct gcc_c_context *s,
|
||
gcc_c_oracle_function *binding_oracle,
|
||
gcc_c_symbol_address_function *address_oracle,
|
||
void *datum)
|
||
{
|
||
libcc1 *self = (libcc1 *) s;
|
||
|
||
self->binding_oracle = binding_oracle;
|
||
self->address_oracle = address_oracle;
|
||
self->oracle_datum = datum;
|
||
}
|
||
|
||
// Instances of these rpc<> template functions are installed into the
|
||
// "c_vtable". These functions are parameterized by type and method
|
||
// name and forward the call via the connection.
|
||
|
||
template<typename R, const char *&NAME>
|
||
R rpc (struct gcc_c_context *s)
|
||
{
|
||
libcc1 *self = (libcc1 *) s;
|
||
R result;
|
||
|
||
if (!cc1_plugin::call (self->connection, NAME, &result))
|
||
return 0;
|
||
return result;
|
||
}
|
||
|
||
template<typename R, const char *&NAME, typename A>
|
||
R rpc (struct gcc_c_context *s, A arg)
|
||
{
|
||
libcc1 *self = (libcc1 *) s;
|
||
R result;
|
||
|
||
if (!cc1_plugin::call (self->connection, NAME, &result, arg))
|
||
return 0;
|
||
return result;
|
||
}
|
||
|
||
template<typename R, const char *&NAME, typename A1, typename A2>
|
||
R rpc (struct gcc_c_context *s, A1 arg1, A2 arg2)
|
||
{
|
||
libcc1 *self = (libcc1 *) s;
|
||
R result;
|
||
|
||
if (!cc1_plugin::call (self->connection, NAME, &result, arg1, arg2))
|
||
return 0;
|
||
return result;
|
||
}
|
||
|
||
template<typename R, const char *&NAME, typename A1, typename A2, typename A3>
|
||
R rpc (struct gcc_c_context *s, A1 arg1, A2 arg2, A3 arg3)
|
||
{
|
||
libcc1 *self = (libcc1 *) s;
|
||
R result;
|
||
|
||
if (!cc1_plugin::call (self->connection, NAME, &result, arg1, arg2, arg3))
|
||
return 0;
|
||
return result;
|
||
}
|
||
|
||
template<typename R, const char *&NAME, typename A1, typename A2, typename A3,
|
||
typename A4>
|
||
R rpc (struct gcc_c_context *s, A1 arg1, A2 arg2, A3 arg3, A4 arg4)
|
||
{
|
||
libcc1 *self = (libcc1 *) s;
|
||
R result;
|
||
|
||
if (!cc1_plugin::call (self->connection, NAME, &result, arg1, arg2, arg3,
|
||
arg4))
|
||
return 0;
|
||
return result;
|
||
}
|
||
|
||
template<typename R, const char *&NAME, typename A1, typename A2, typename A3,
|
||
typename A4, typename A5>
|
||
R rpc (struct gcc_c_context *s, A1 arg1, A2 arg2, A3 arg3, A4 arg4, A5 arg5)
|
||
{
|
||
libcc1 *self = (libcc1 *) s;
|
||
R result;
|
||
|
||
if (!cc1_plugin::call (self->connection, NAME, &result, arg1, arg2, arg3,
|
||
arg4, arg5))
|
||
return 0;
|
||
return result;
|
||
}
|
||
|
||
template<typename R, const char *&NAME, typename A1, typename A2, typename A3,
|
||
typename A4, typename A5, typename A6, typename A7>
|
||
R rpc (struct gcc_c_context *s, A1 arg1, A2 arg2, A3 arg3, A4 arg4, A5 arg5,
|
||
A6 arg6, A7 arg7)
|
||
{
|
||
libcc1 *self = (libcc1 *) s;
|
||
R result;
|
||
|
||
if (!cc1_plugin::call (self->connection, NAME, &result, arg1, arg2, arg3,
|
||
arg4, arg5, arg6, arg7))
|
||
return 0;
|
||
return result;
|
||
}
|
||
|
||
static const struct gcc_c_fe_vtable c_vtable =
|
||
{
|
||
GCC_C_FE_VERSION_0,
|
||
set_callbacks,
|
||
|
||
#define GCC_METHOD0(R, N) \
|
||
rpc<R, cc1_plugin::c::N>,
|
||
#define GCC_METHOD1(R, N, A) \
|
||
rpc<R, cc1_plugin::c::N, A>,
|
||
#define GCC_METHOD2(R, N, A, B) \
|
||
rpc<R, cc1_plugin::c::N, A, B>,
|
||
#define GCC_METHOD3(R, N, A, B, C) \
|
||
rpc<R, cc1_plugin::c::N, A, B, C>,
|
||
#define GCC_METHOD4(R, N, A, B, C, D) \
|
||
rpc<R, cc1_plugin::c::N, A, B, C, D>,
|
||
#define GCC_METHOD5(R, N, A, B, C, D, E) \
|
||
rpc<R, cc1_plugin::c::N, A, B, C, D, E>,
|
||
#define GCC_METHOD7(R, N, A, B, C, D, E, F, G) \
|
||
rpc<R, cc1_plugin::c::N, A, B, C, D, E, F, G>,
|
||
|
||
#include "gcc-c-fe.def"
|
||
|
||
#undef GCC_METHOD0
|
||
#undef GCC_METHOD1
|
||
#undef GCC_METHOD2
|
||
#undef GCC_METHOD3
|
||
#undef GCC_METHOD4
|
||
#undef GCC_METHOD5
|
||
#undef GCC_METHOD7
|
||
};
|
||
|
||
|
||
|
||
// Construct an appropriate regexp to match the compiler name.
|
||
static std::string
|
||
make_regexp (const char *triplet_regexp, const char *compiler)
|
||
{
|
||
std::stringstream buf;
|
||
|
||
buf << "^" << triplet_regexp << "-";
|
||
|
||
// Quote the compiler name in case it has something funny in it.
|
||
for (const char *p = compiler; *p; ++p)
|
||
{
|
||
switch (*p)
|
||
{
|
||
case '.':
|
||
case '^':
|
||
case '$':
|
||
case '*':
|
||
case '+':
|
||
case '?':
|
||
case '(':
|
||
case ')':
|
||
case '[':
|
||
case '{':
|
||
case '\\':
|
||
case '|':
|
||
buf << '\\';
|
||
break;
|
||
}
|
||
buf << *p;
|
||
}
|
||
buf << "$";
|
||
|
||
return buf.str ();
|
||
}
|
||
|
||
static void
|
||
libcc1_set_verbose (struct gcc_base_context *s, int /* bool */ verbose)
|
||
{
|
||
libcc1 *self = (libcc1 *) s;
|
||
|
||
self->verbose = verbose != 0;
|
||
}
|
||
|
||
char *
|
||
libcc1::compiler::find (std::string &compiler ATTRIBUTE_UNUSED) const
|
||
{
|
||
return xstrdup (_("Compiler has not been specified"));
|
||
}
|
||
|
||
char *
|
||
libcc1::compiler_triplet_regexp::find (std::string &compiler) const
|
||
{
|
||
std::string rx = make_regexp (triplet_regexp_.c_str (), C_COMPILER_NAME);
|
||
if (self_->verbose)
|
||
fprintf (stderr, _("searching for compiler matching regex %s\n"),
|
||
rx.c_str());
|
||
regex_t triplet;
|
||
int code = regcomp (&triplet, rx.c_str (), REG_EXTENDED | REG_NOSUB);
|
||
if (code != 0)
|
||
{
|
||
size_t len = regerror (code, &triplet, NULL, 0);
|
||
char err[len];
|
||
|
||
regerror (code, &triplet, err, len);
|
||
|
||
return concat ("Could not compile regexp \"",
|
||
rx.c_str (),
|
||
"\": ",
|
||
err,
|
||
(char *) NULL);
|
||
}
|
||
|
||
if (!find_compiler (triplet, &compiler))
|
||
{
|
||
regfree (&triplet);
|
||
return concat ("Could not find a compiler matching \"",
|
||
rx.c_str (),
|
||
"\"",
|
||
(char *) NULL);
|
||
}
|
||
regfree (&triplet);
|
||
if (self_->verbose)
|
||
fprintf (stderr, _("found compiler %s\n"), compiler.c_str());
|
||
return NULL;
|
||
}
|
||
|
||
char *
|
||
libcc1::compiler_driver_filename::find (std::string &compiler) const
|
||
{
|
||
// Simulate fnotice by fprintf.
|
||
if (self_->verbose)
|
||
fprintf (stderr, _("using explicit compiler filename %s\n"),
|
||
driver_filename_.c_str());
|
||
compiler = driver_filename_;
|
||
return NULL;
|
||
}
|
||
|
||
static char *
|
||
libcc1_set_arguments (struct gcc_base_context *s,
|
||
int argc, char **argv)
|
||
{
|
||
libcc1 *self = (libcc1 *) s;
|
||
|
||
std::string compiler;
|
||
char *errmsg = self->compilerp->find (compiler);
|
||
if (errmsg != NULL)
|
||
return errmsg;
|
||
|
||
self->args.push_back (compiler);
|
||
|
||
for (int i = 0; i < argc; ++i)
|
||
self->args.push_back (argv[i]);
|
||
|
||
return NULL;
|
||
}
|
||
|
||
static char *
|
||
libcc1_set_triplet_regexp (struct gcc_base_context *s,
|
||
const char *triplet_regexp)
|
||
{
|
||
libcc1 *self = (libcc1 *) s;
|
||
|
||
delete self->compilerp;
|
||
self->compilerp = new libcc1::compiler_triplet_regexp (self, triplet_regexp);
|
||
return NULL;
|
||
}
|
||
|
||
static char *
|
||
libcc1_set_driver_filename (struct gcc_base_context *s,
|
||
const char *driver_filename)
|
||
{
|
||
libcc1 *self = (libcc1 *) s;
|
||
|
||
delete self->compilerp;
|
||
self->compilerp = new libcc1::compiler_driver_filename (self,
|
||
driver_filename);
|
||
return NULL;
|
||
}
|
||
|
||
static char *
|
||
libcc1_set_arguments_v0 (struct gcc_base_context *s,
|
||
const char *triplet_regexp,
|
||
int argc, char **argv)
|
||
{
|
||
char *errmsg = libcc1_set_triplet_regexp (s, triplet_regexp);
|
||
if (errmsg != NULL)
|
||
return errmsg;
|
||
|
||
return libcc1_set_arguments (s, argc, argv);
|
||
}
|
||
|
||
static void
|
||
libcc1_set_source_file (struct gcc_base_context *s,
|
||
const char *file)
|
||
{
|
||
libcc1 *self = (libcc1 *) s;
|
||
|
||
self->source_file = file;
|
||
}
|
||
|
||
static void
|
||
libcc1_set_print_callback (struct gcc_base_context *s,
|
||
void (*print_function) (void *datum,
|
||
const char *message),
|
||
void *datum)
|
||
{
|
||
libcc1 *self = (libcc1 *) s;
|
||
|
||
self->print_function = print_function;
|
||
self->print_datum = datum;
|
||
}
|
||
|
||
static int
|
||
fork_exec (libcc1 *self, char **argv, int spair_fds[2], int stderr_fds[2])
|
||
{
|
||
pid_t child_pid = fork ();
|
||
|
||
if (child_pid == -1)
|
||
{
|
||
close (spair_fds[0]);
|
||
close (spair_fds[1]);
|
||
close (stderr_fds[0]);
|
||
close (stderr_fds[1]);
|
||
return 0;
|
||
}
|
||
|
||
if (child_pid == 0)
|
||
{
|
||
// Child.
|
||
dup2 (stderr_fds[1], 1);
|
||
dup2 (stderr_fds[1], 2);
|
||
close (stderr_fds[0]);
|
||
close (stderr_fds[1]);
|
||
close (spair_fds[0]);
|
||
|
||
execvp (argv[0], argv);
|
||
_exit (127);
|
||
}
|
||
else
|
||
{
|
||
// Parent.
|
||
close (spair_fds[1]);
|
||
close (stderr_fds[1]);
|
||
|
||
cc1_plugin::status result = cc1_plugin::FAIL;
|
||
if (self->connection->send ('H')
|
||
&& ::cc1_plugin::marshall (self->connection, GCC_C_FE_VERSION_1))
|
||
result = self->connection->wait_for_query ();
|
||
|
||
close (spair_fds[0]);
|
||
close (stderr_fds[0]);
|
||
|
||
while (true)
|
||
{
|
||
int status;
|
||
|
||
if (waitpid (child_pid, &status, 0) == -1)
|
||
{
|
||
if (errno != EINTR)
|
||
return 0;
|
||
}
|
||
|
||
if (!WIFEXITED (status) || WEXITSTATUS (status) != 0)
|
||
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);
|
||
}
|