linux-atomic.c (__kernel_cmpxchg): Change argument 1 to volatile void *.
[official-gcc.git] / libcc1 / libcp1.cc
blob8bec64b3e6669748d9205068ecbcb0d9edbf3afa
1 /* The library used by gdb.
2 Copyright (C) 2014-2019 Free Software Foundation, Inc.
4 This file is part of GCC.
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.
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.
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/>. */
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 <sstream>
32 #include "marshall-cp.hh"
33 #include "rpc.hh"
34 #include "connection.hh"
35 #include "names.hh"
36 #include "callbacks.hh"
37 #include "libiberty.h"
38 #include "xregex.h"
39 #include "findcomp.hh"
40 #include "compiler-name.hh"
41 #include "intl.h"
43 struct libcp1;
45 class libcp1_connection;
47 // The C compiler context that we hand back to our caller.
48 struct libcp1 : public gcc_cp_context
50 libcp1 (const gcc_base_vtable *, const gcc_cp_fe_vtable *);
51 ~libcp1 ();
53 // A convenience function to print something.
54 void print (const char *str)
56 this->print_function (this->print_datum, str);
59 libcp1_connection *connection;
61 gcc_cp_oracle_function *binding_oracle;
62 gcc_cp_symbol_address_function *address_oracle;
63 gcc_cp_enter_leave_user_expr_scope_function *enter_scope;
64 gcc_cp_enter_leave_user_expr_scope_function *leave_scope;
65 void *oracle_datum;
67 void (*print_function) (void *datum, const char *message);
68 void *print_datum;
70 std::vector<std::string> args;
71 std::string source_file;
73 /* Non-zero as an equivalent to gcc driver option "-v". */
74 bool verbose;
76 /* Compiler to set by set_triplet_regexp or set_driver_filename. */
77 class compiler
79 protected:
80 libcp1 *self_;
81 public:
82 compiler (libcp1 *self) : self_ (self)
85 virtual char *find (std::string &compiler) const;
86 virtual ~compiler ()
89 } *compilerp;
91 /* Compiler to set by set_triplet_regexp. */
92 class compiler_triplet_regexp : public compiler
94 private:
95 std::string triplet_regexp_;
96 public:
97 virtual char *find (std::string &compiler) const;
98 compiler_triplet_regexp (libcp1 *self, std::string triplet_regexp)
99 : compiler (self), triplet_regexp_ (triplet_regexp)
102 virtual ~compiler_triplet_regexp ()
107 /* Compiler to set by set_driver_filename. */
108 class compiler_driver_filename : public compiler
110 private:
111 std::string driver_filename_;
112 public:
113 virtual char *find (std::string &compiler) const;
114 compiler_driver_filename (libcp1 *self, std::string driver_filename)
115 : compiler (self), driver_filename_ (driver_filename)
118 virtual ~compiler_driver_filename ()
124 // A local subclass of connection that holds a back-pointer to the
125 // gcc_c_context object that we provide to our caller.
126 class libcp1_connection : public cc1_plugin::connection
128 public:
130 libcp1_connection (int fd, int aux_fd, libcp1 *b)
131 : connection (fd, aux_fd),
132 back_ptr (b)
136 virtual void print (const char *buf)
138 back_ptr->print (buf);
141 libcp1 *back_ptr;
144 libcp1::libcp1 (const gcc_base_vtable *v,
145 const gcc_cp_fe_vtable *cv)
146 : connection (NULL),
147 binding_oracle (NULL),
148 address_oracle (NULL),
149 oracle_datum (NULL),
150 print_function (NULL),
151 print_datum (NULL),
152 args (),
153 source_file (),
154 verbose (false),
155 compilerp (new libcp1::compiler (this))
157 base.ops = v;
158 cp_ops = cv;
161 libcp1::~libcp1 ()
163 delete connection;
164 delete compilerp;
169 // Enclose these functions in an anonymous namespace because they
170 // shouldn't be exported, but they can't be static because they're
171 // used as template arguments.
172 namespace {
173 // This is a wrapper function that is called by the RPC system and
174 // that then forwards the call to the library user. Note that the
175 // return value is not used; the type cannot be 'void' due to
176 // limitations in our simple RPC.
178 cp_call_binding_oracle (cc1_plugin::connection *conn,
179 enum gcc_cp_oracle_request request,
180 const char *identifier)
182 libcp1 *self = ((libcp1_connection *) conn)->back_ptr;
184 self->binding_oracle (self->oracle_datum, self, request, identifier);
185 return 1;
188 // This is a wrapper function that is called by the RPC system and
189 // that then forwards the call to the library user.
190 gcc_address
191 cp_call_symbol_address (cc1_plugin::connection *conn, const char *identifier)
193 libcp1 *self = ((libcp1_connection *) conn)->back_ptr;
195 return self->address_oracle (self->oracle_datum, self, identifier);
199 cp_call_enter_scope (cc1_plugin::connection *conn)
201 libcp1 *self = ((libcp1_connection *) conn)->back_ptr;
203 self->enter_scope (self->oracle_datum, self);
204 return 1;
208 cp_call_leave_scope (cc1_plugin::connection *conn)
210 libcp1 *self = ((libcp1_connection *) conn)->back_ptr;
212 self->leave_scope (self->oracle_datum, self);
213 return 1;
215 } /* anonymous namespace */
219 static void
220 set_callbacks (struct gcc_cp_context *s,
221 gcc_cp_oracle_function *binding_oracle,
222 gcc_cp_symbol_address_function *address_oracle,
223 gcc_cp_enter_leave_user_expr_scope_function *enter_scope,
224 gcc_cp_enter_leave_user_expr_scope_function *leave_scope,
225 void *datum)
227 libcp1 *self = (libcp1 *) s;
229 self->binding_oracle = binding_oracle;
230 self->address_oracle = address_oracle;
231 self->enter_scope = enter_scope;
232 self->leave_scope = leave_scope;
233 self->oracle_datum = datum;
236 // Instances of these rpc<> template functions are installed into the
237 // "cp_vtable". These functions are parameterized by type and method
238 // name and forward the call via the connection.
240 template<typename R, const char *&NAME>
241 R rpc (struct gcc_cp_context *s)
243 libcp1 *self = (libcp1 *) s;
244 R result;
246 if (!cc1_plugin::call (self->connection, NAME, &result))
247 return 0;
248 return result;
251 template<typename R, const char *&NAME, typename A>
252 R rpc (struct gcc_cp_context *s, A arg)
254 libcp1 *self = (libcp1 *) s;
255 R result;
257 if (!cc1_plugin::call (self->connection, NAME, &result, arg))
258 return 0;
259 return result;
262 template<typename R, const char *&NAME, typename A1, typename A2>
263 R rpc (struct gcc_cp_context *s, A1 arg1, A2 arg2)
265 libcp1 *self = (libcp1 *) s;
266 R result;
268 if (!cc1_plugin::call (self->connection, NAME, &result, arg1, arg2))
269 return 0;
270 return result;
273 template<typename R, const char *&NAME, typename A1, typename A2, typename A3>
274 R rpc (struct gcc_cp_context *s, A1 arg1, A2 arg2, A3 arg3)
276 libcp1 *self = (libcp1 *) s;
277 R result;
279 if (!cc1_plugin::call (self->connection, NAME, &result, arg1, arg2, arg3))
280 return 0;
281 return result;
284 template<typename R, const char *&NAME, typename A1, typename A2, typename A3,
285 typename A4>
286 R rpc (struct gcc_cp_context *s, A1 arg1, A2 arg2, A3 arg3, A4 arg4)
288 libcp1 *self = (libcp1 *) s;
289 R result;
291 if (!cc1_plugin::call (self->connection, NAME, &result, arg1, arg2, arg3,
292 arg4))
293 return 0;
294 return result;
297 template<typename R, const char *&NAME, typename A1, typename A2, typename A3,
298 typename A4, typename A5>
299 R rpc (struct gcc_cp_context *s, A1 arg1, A2 arg2, A3 arg3, A4 arg4, A5 arg5)
301 libcp1 *self = (libcp1 *) s;
302 R result;
304 if (!cc1_plugin::call (self->connection, NAME, &result, arg1, arg2, arg3,
305 arg4, arg5))
306 return 0;
307 return result;
310 template<typename R, const char *&NAME, typename A1, typename A2, typename A3,
311 typename A4, typename A5, typename A6, typename A7>
312 R rpc (struct gcc_cp_context *s, A1 arg1, A2 arg2, A3 arg3, A4 arg4, A5 arg5,
313 A6 arg6, A7 arg7)
315 libcp1 *self = (libcp1 *) s;
316 R result;
318 if (!cc1_plugin::call (self->connection, NAME, &result, arg1, arg2, arg3,
319 arg4, arg5, arg6, arg7))
320 return 0;
321 return result;
324 static const struct gcc_cp_fe_vtable cp_vtable =
326 GCC_CP_FE_VERSION_0,
327 set_callbacks,
329 #define GCC_METHOD0(R, N) \
330 rpc<R, cc1_plugin::cp::N>,
331 #define GCC_METHOD1(R, N, A) \
332 rpc<R, cc1_plugin::cp::N, A>,
333 #define GCC_METHOD2(R, N, A, B) \
334 rpc<R, cc1_plugin::cp::N, A, B>,
335 #define GCC_METHOD3(R, N, A, B, C) \
336 rpc<R, cc1_plugin::cp::N, A, B, C>,
337 #define GCC_METHOD4(R, N, A, B, C, D) \
338 rpc<R, cc1_plugin::cp::N, A, B, C, D>,
339 #define GCC_METHOD5(R, N, A, B, C, D, E) \
340 rpc<R, cc1_plugin::cp::N, A, B, C, D, E>,
341 #define GCC_METHOD7(R, N, A, B, C, D, E, F, G) \
342 rpc<R, cc1_plugin::cp::N, A, B, C, D, E, F, G>,
344 #include "gcc-cp-fe.def"
346 #undef GCC_METHOD0
347 #undef GCC_METHOD1
348 #undef GCC_METHOD2
349 #undef GCC_METHOD3
350 #undef GCC_METHOD4
351 #undef GCC_METHOD5
352 #undef GCC_METHOD7
357 // Construct an appropriate regexp to match the compiler name.
358 static std::string
359 make_regexp (const char *triplet_regexp, const char *compiler)
361 std::stringstream buf;
363 buf << "^" << triplet_regexp << "-";
365 // Quote the compiler name in case it has something funny in it.
366 for (const char *p = compiler; *p; ++p)
368 switch (*p)
370 case '.':
371 case '^':
372 case '$':
373 case '*':
374 case '+':
375 case '?':
376 case '(':
377 case ')':
378 case '[':
379 case '{':
380 case '\\':
381 case '|':
382 buf << '\\';
383 break;
385 buf << *p;
387 buf << "$";
389 return buf.str ();
392 static void
393 libcp1_set_verbose (struct gcc_base_context *s, int /* bool */ verbose)
395 libcp1 *self = (libcp1 *) s;
397 self->verbose = verbose != 0;
400 char *
401 libcp1::compiler::find (std::string &compiler ATTRIBUTE_UNUSED) const
403 return xstrdup (_("Compiler has not been specified"));
406 char *
407 libcp1::compiler_triplet_regexp::find (std::string &compiler) const
409 std::string rx = make_regexp (triplet_regexp_.c_str (), CP_COMPILER_NAME);
410 if (self_->verbose)
411 fprintf (stderr, _("searching for compiler matching regex %s\n"),
412 rx.c_str());
413 regex_t triplet;
414 int code = regcomp (&triplet, rx.c_str (), REG_EXTENDED | REG_NOSUB);
415 if (code != 0)
417 size_t len = regerror (code, &triplet, NULL, 0);
418 char err[len];
420 regerror (code, &triplet, err, len);
422 return concat ("Could not compile regexp \"",
423 rx.c_str (),
424 "\": ",
425 err,
426 (char *) NULL);
429 if (!find_compiler (triplet, &compiler))
431 regfree (&triplet);
432 return concat ("Could not find a compiler matching \"",
433 rx.c_str (),
434 "\"",
435 (char *) NULL);
437 regfree (&triplet);
438 if (self_->verbose)
439 fprintf (stderr, _("found compiler %s\n"), compiler.c_str());
440 return NULL;
443 char *
444 libcp1::compiler_driver_filename::find (std::string &compiler) const
446 // Simulate fnotice by fprintf.
447 if (self_->verbose)
448 fprintf (stderr, _("using explicit compiler filename %s\n"),
449 driver_filename_.c_str());
450 compiler = driver_filename_;
451 return NULL;
454 static char *
455 libcp1_set_arguments (struct gcc_base_context *s,
456 int argc, char **argv)
458 libcp1 *self = (libcp1 *) s;
460 std::string compiler;
461 char *errmsg = self->compilerp->find (compiler);
462 if (errmsg != NULL)
463 return errmsg;
465 self->args.push_back (compiler);
467 for (int i = 0; i < argc; ++i)
468 self->args.push_back (argv[i]);
470 return NULL;
473 static char *
474 libcp1_set_triplet_regexp (struct gcc_base_context *s,
475 const char *triplet_regexp)
477 libcp1 *self = (libcp1 *) s;
479 delete self->compilerp;
480 self->compilerp = new libcp1::compiler_triplet_regexp (self, triplet_regexp);
481 return NULL;
484 static char *
485 libcp1_set_driver_filename (struct gcc_base_context *s,
486 const char *driver_filename)
488 libcp1 *self = (libcp1 *) s;
490 delete self->compilerp;
491 self->compilerp = new libcp1::compiler_driver_filename (self,
492 driver_filename);
493 return NULL;
496 static char *
497 libcp1_set_arguments_v0 (struct gcc_base_context *s,
498 const char *triplet_regexp,
499 int argc, char **argv)
501 char *errmsg = libcp1_set_triplet_regexp (s, triplet_regexp);
502 if (errmsg != NULL)
503 return errmsg;
505 return libcp1_set_arguments (s, argc, argv);
508 static void
509 libcp1_set_source_file (struct gcc_base_context *s,
510 const char *file)
512 libcp1 *self = (libcp1 *) s;
514 self->source_file = file;
517 static void
518 libcp1_set_print_callback (struct gcc_base_context *s,
519 void (*print_function) (void *datum,
520 const char *message),
521 void *datum)
523 libcp1 *self = (libcp1 *) s;
525 self->print_function = print_function;
526 self->print_datum = datum;
529 static int
530 fork_exec (libcp1 *self, char **argv, int spair_fds[2], int stderr_fds[2])
532 pid_t child_pid = fork ();
534 if (child_pid == -1)
536 close (spair_fds[0]);
537 close (spair_fds[1]);
538 close (stderr_fds[0]);
539 close (stderr_fds[1]);
540 return 0;
543 if (child_pid == 0)
545 // Child.
546 dup2 (stderr_fds[1], 1);
547 dup2 (stderr_fds[1], 2);
548 close (stderr_fds[0]);
549 close (stderr_fds[1]);
550 close (spair_fds[0]);
552 execvp (argv[0], argv);
553 _exit (127);
555 else
557 // Parent.
558 close (spair_fds[1]);
559 close (stderr_fds[1]);
561 cc1_plugin::status result = cc1_plugin::FAIL;
562 if (self->connection->send ('H')
563 && ::cc1_plugin::marshall (self->connection, GCC_CP_FE_VERSION_0))
564 result = self->connection->wait_for_query ();
566 close (spair_fds[0]);
567 close (stderr_fds[0]);
569 while (true)
571 int status;
573 if (waitpid (child_pid, &status, 0) == -1)
575 if (errno != EINTR)
576 return 0;
579 if (!WIFEXITED (status) || WEXITSTATUS (status) != 0)
580 return 0;
581 break;
584 if (!result)
585 return 0;
586 return 1;
590 static int
591 libcp1_compile (struct gcc_base_context *s,
592 const char *filename)
594 libcp1 *self = (libcp1 *) s;
596 int fds[2];
597 if (socketpair (AF_UNIX, SOCK_STREAM, 0, fds) != 0)
599 self->print ("could not create socketpair\n");
600 return 0;
603 int stderr_fds[2];
604 if (pipe (stderr_fds) != 0)
606 self->print ("could not create pipe\n");
607 close (fds[0]);
608 close (fds[1]);
609 return 0;
612 self->args.push_back ("-fplugin=libcp1plugin");
613 char buf[100];
614 if (snprintf (buf, sizeof (buf), "-fplugin-arg-libcp1plugin-fd=%d", fds[1])
615 >= (long) sizeof (buf))
616 abort ();
617 self->args.push_back (buf);
619 self->args.push_back (self->source_file);
620 self->args.push_back ("-c");
621 self->args.push_back ("-o");
622 self->args.push_back (filename);
623 if (self->verbose)
624 self->args.push_back ("-v");
626 self->connection = new libcp1_connection (fds[0], stderr_fds[0], self);
628 cc1_plugin::callback_ftype *fun
629 = cc1_plugin::callback<int,
630 enum gcc_cp_oracle_request,
631 const char *,
632 cp_call_binding_oracle>;
633 self->connection->add_callback ("binding_oracle", fun);
635 fun = cc1_plugin::callback<gcc_address,
636 const char *,
637 cp_call_symbol_address>;
638 self->connection->add_callback ("address_oracle", fun);
640 fun = cc1_plugin::callback<int,
641 cp_call_enter_scope>;
642 self->connection->add_callback ("enter_scope", fun);
644 fun = cc1_plugin::callback<int,
645 cp_call_leave_scope>;
646 self->connection->add_callback ("leave_scope", fun);
648 char **argv = new (std::nothrow) char *[self->args.size () + 1];
649 if (argv == NULL)
650 return 0;
652 for (unsigned int i = 0; i < self->args.size (); ++i)
653 argv[i] = const_cast<char *> (self->args[i].c_str ());
654 argv[self->args.size ()] = NULL;
656 return fork_exec (self, argv, fds, stderr_fds);
659 static int
660 libcp1_compile_v0 (struct gcc_base_context *s, const char *filename,
661 int verbose)
663 libcp1_set_verbose (s, verbose);
664 return libcp1_compile (s, filename);
667 static void
668 libcp1_destroy (struct gcc_base_context *s)
670 libcp1 *self = (libcp1 *) s;
672 delete self;
675 static const struct gcc_base_vtable vtable =
677 GCC_FE_VERSION_0,
678 libcp1_set_arguments_v0,
679 libcp1_set_source_file,
680 libcp1_set_print_callback,
681 libcp1_compile_v0,
682 libcp1_destroy,
683 libcp1_set_verbose,
684 libcp1_compile,
685 libcp1_set_arguments,
686 libcp1_set_triplet_regexp,
687 libcp1_set_driver_filename,
690 extern "C" gcc_cp_fe_context_function gcc_cp_fe_context;
692 #ifdef __GNUC__
693 #pragma GCC visibility push(default)
694 #endif
696 extern "C"
697 struct gcc_cp_context *
698 gcc_cp_fe_context (enum gcc_base_api_version base_version,
699 enum gcc_cp_api_version cp_version)
701 if ((base_version != GCC_FE_VERSION_0 && base_version != GCC_FE_VERSION_1)
702 || cp_version != GCC_CP_FE_VERSION_0)
703 return NULL;
705 return new libcp1 (&vtable, &cp_vtable);