443 lines
9.3 KiB
C
443 lines
9.3 KiB
C
/* Code to maintain a C++ template repository.
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Copyright (C) 1995, 1996, 1997, 1998, 2000, 2001, 2002, 2003
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Free Software Foundation, Inc.
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Contributed by Jason Merrill (jason@cygnus.com)
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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
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 2, or (at your option)
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any later version.
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GCC is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License 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 COPYING. If not, write to
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the Free Software Foundation, 59 Temple Place - Suite 330,
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Boston, MA 02111-1307, USA. */
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/* My strategy here is as follows:
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Everything should be emitted in a translation unit where it is used.
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The results of the automatic process should be easily reproducible with
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explicit code. */
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#include "config.h"
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#include "system.h"
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#include "coretypes.h"
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#include "tm.h"
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#include "tree.h"
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#include "cp-tree.h"
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#include "input.h"
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#include "obstack.h"
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#include "toplev.h"
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#include "diagnostic.h"
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static tree repo_get_id (tree);
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static char *extract_string (char **);
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static const char *get_base_filename (const char *);
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static void open_repo_file (const char *);
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static char *afgets (FILE *);
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static void reopen_repo_file_for_write (void);
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static GTY(()) tree pending_repo;
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static GTY(()) tree original_repo;
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static char *repo_name;
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static FILE *repo_file;
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static const char *old_args, *old_dir, *old_main;
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static struct obstack temporary_obstack;
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#define IDENTIFIER_REPO_USED(NODE) (TREE_LANG_FLAG_3 (NODE))
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#define IDENTIFIER_REPO_CHOSEN(NODE) (TREE_LANG_FLAG_4 (NODE))
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#if 0
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/* Record the flags used to compile this translation unit. */
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void
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repo_compile_flags (int argc, char **argv)
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{
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}
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/* If this template has not been seen before, add a note to the repository
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saying where the declaration was. This may be used to find the
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definition at link time. */
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void
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repo_template_declared (tree t)
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{}
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/* Note where the definition of a template lives so that instantiations can
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be generated later. */
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void
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repo_template_defined (tree t)
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{}
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/* Note where the definition of a class lives to that template
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instantiations can use it. */
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void
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repo_class_defined (tree t)
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{}
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#endif
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static tree
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repo_get_id (tree t)
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{
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if (TYPE_P (t))
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{
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tree vtable;
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/* If we're not done setting up the class, we may not have set up
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the vtable, so going ahead would give the wrong answer.
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See g++.pt/instantiate4.C. */
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if (!COMPLETE_TYPE_P (t) || TYPE_BEING_DEFINED (t))
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abort ();
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vtable = get_vtbl_decl_for_binfo (TYPE_BINFO (t));
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t = vtable;
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if (t == NULL_TREE)
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return t;
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}
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return DECL_ASSEMBLER_NAME (t);
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}
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/* Note that a template has been used. If we can see the definition, offer
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to emit it. */
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void
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repo_template_used (tree t)
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{
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tree id;
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if (! flag_use_repository)
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return;
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id = repo_get_id (t);
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if (id == NULL_TREE)
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return;
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if (TYPE_P (t))
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{
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if (IDENTIFIER_REPO_CHOSEN (id))
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mark_class_instantiated (t, 0);
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}
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else if (DECL_P (t))
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{
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if (IDENTIFIER_REPO_CHOSEN (id))
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/* It doesn't make sense to instantiate a clone, so we
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instantiate the cloned function instead. Note that this
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approach will not work correctly if collect2 assigns
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different clones to different files -- but it shouldn't. */
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mark_decl_instantiated (DECL_CLONED_FUNCTION_P (t)
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? DECL_CLONED_FUNCTION (t) : t,
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0);
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}
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else
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abort ();
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if (! IDENTIFIER_REPO_USED (id))
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{
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IDENTIFIER_REPO_USED (id) = 1;
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pending_repo = tree_cons (NULL_TREE, id, pending_repo);
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}
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}
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#if 0
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/* Note that the vtable for a class has been used, and offer to emit it. */
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static void
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repo_vtable_used (tree t)
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{
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if (! flag_use_repository)
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return;
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pending_repo = tree_cons (NULL_TREE, t, pending_repo);
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}
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/* Note that an inline with external linkage has been used, and offer to
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emit it. */
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void
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repo_inline_used (tree fn)
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{
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if (! flag_use_repository)
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return;
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/* Member functions of polymorphic classes go with their vtables. */
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if (DECL_FUNCTION_MEMBER_P (fn)
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&& TYPE_POLYMORPHIC_P (DECL_CONTEXT (fn)))
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{
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repo_vtable_used (DECL_CONTEXT (fn));
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return;
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}
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pending_repo = tree_cons (NULL_TREE, fn, pending_repo);
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}
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/* Note that a particular typeinfo node has been used, and offer to
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emit it. */
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void
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repo_tinfo_used (tree ti)
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{
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}
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#endif
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void
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repo_template_instantiated (tree t, bool extern_p)
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{
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if (! extern_p)
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{
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tree id = repo_get_id (t);
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if (id)
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IDENTIFIER_REPO_CHOSEN (id) = 1;
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}
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}
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/* Parse a reasonable subset of shell quoting syntax. */
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static char *
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extract_string (char **pp)
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{
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char *p = *pp;
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int backquote = 0;
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int inside = 0;
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for (;;)
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{
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char c = *p;
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if (c == '\0')
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break;
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++p;
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if (backquote)
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obstack_1grow (&temporary_obstack, c);
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else if (! inside && c == ' ')
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break;
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else if (! inside && c == '\\')
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backquote = 1;
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else if (c == '\'')
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inside = !inside;
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else
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obstack_1grow (&temporary_obstack, c);
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}
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obstack_1grow (&temporary_obstack, '\0');
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*pp = p;
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return obstack_finish (&temporary_obstack);
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}
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static const char *
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get_base_filename (const char *filename)
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{
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char *p = getenv ("COLLECT_GCC_OPTIONS");
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char *output = NULL;
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int compiling = 0;
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while (p && *p)
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{
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char *q = extract_string (&p);
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if (strcmp (q, "-o") == 0)
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output = extract_string (&p);
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else if (strcmp (q, "-c") == 0)
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compiling = 1;
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}
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if (compiling && output)
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return output;
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if (p && ! compiling)
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{
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warning ("-frepo must be used with -c");
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flag_use_repository = 0;
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return NULL;
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}
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return lbasename (filename);
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}
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static void
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open_repo_file (const char *filename)
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{
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const char *p;
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const char *s = get_base_filename (filename);
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if (s == NULL)
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return;
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p = lbasename (s);
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p = strrchr (p, '.');
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if (! p)
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p = s + strlen (s);
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repo_name = xmalloc (p - s + 5);
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memcpy (repo_name, s, p - s);
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memcpy (repo_name + (p - s), ".rpo", 5);
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repo_file = fopen (repo_name, "r");
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}
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static char *
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afgets (FILE *stream)
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{
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int c;
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while ((c = getc (stream)) != EOF && c != '\n')
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obstack_1grow (&temporary_obstack, c);
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if (obstack_object_size (&temporary_obstack) == 0)
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return NULL;
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obstack_1grow (&temporary_obstack, '\0');
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return obstack_finish (&temporary_obstack);
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}
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void
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init_repo (const char *filename)
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{
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char *buf;
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if (! flag_use_repository)
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return;
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gcc_obstack_init (&temporary_obstack);
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open_repo_file (filename);
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if (repo_file == 0)
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return;
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while ((buf = afgets (repo_file)))
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{
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switch (buf[0])
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{
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case 'A':
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old_args = ggc_strdup (buf + 2);
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break;
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case 'D':
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old_dir = ggc_strdup (buf + 2);
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break;
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case 'M':
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old_main = ggc_strdup (buf + 2);
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break;
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case 'C':
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case 'O':
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{
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tree id = get_identifier (buf + 2);
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tree orig;
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if (buf[0] == 'C')
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{
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IDENTIFIER_REPO_CHOSEN (id) = 1;
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orig = integer_one_node;
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}
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else
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orig = NULL_TREE;
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original_repo = tree_cons (orig, id, original_repo);
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}
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break;
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default:
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error ("mysterious repository information in %s", repo_name);
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}
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obstack_free (&temporary_obstack, buf);
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}
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}
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static void
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reopen_repo_file_for_write (void)
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{
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if (repo_file)
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fclose (repo_file);
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repo_file = fopen (repo_name, "w");
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if (repo_file == 0)
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{
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error ("can't create repository information file `%s'", repo_name);
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flag_use_repository = 0;
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}
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}
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/* Emit any pending repos. */
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void
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finish_repo (void)
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{
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tree t;
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bool repo_changed = false;
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char *dir, *args;
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if (!flag_use_repository)
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return;
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/* Do we have to write out a new info file? */
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/* Are there any old templates that aren't used any longer or that are
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newly chosen? */
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for (t = original_repo; t; t = TREE_CHAIN (t))
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{
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if (!IDENTIFIER_REPO_USED (TREE_VALUE (t))
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|| (!TREE_PURPOSE (t) && IDENTIFIER_REPO_CHOSEN (TREE_VALUE (t))))
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{
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repo_changed = true;
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break;
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}
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IDENTIFIER_REPO_USED (TREE_VALUE (t)) = 0;
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}
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/* Are there any templates that are newly used? */
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if (!repo_changed)
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for (t = pending_repo; t; t = TREE_CHAIN (t))
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{
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if (IDENTIFIER_REPO_USED (TREE_VALUE (t)))
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{
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repo_changed = true;
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break;
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}
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}
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dir = getpwd ();
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args = getenv ("COLLECT_GCC_OPTIONS");
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if (!repo_changed && pending_repo)
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if (strcmp (old_main, main_input_filename) != 0
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|| strcmp (old_dir, dir) != 0
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|| (args == NULL) != (old_args == NULL)
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|| (args && strcmp (old_args, args) != 0))
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repo_changed = true;
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if (!repo_changed || errorcount || sorrycount)
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goto out;
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reopen_repo_file_for_write ();
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if (repo_file == 0)
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goto out;
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fprintf (repo_file, "M %s\n", main_input_filename);
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fprintf (repo_file, "D %s\n", dir);
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if (args)
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fprintf (repo_file, "A %s\n", args);
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for (t = pending_repo; t; t = TREE_CHAIN (t))
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{
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tree val = TREE_VALUE (t);
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char type = IDENTIFIER_REPO_CHOSEN (val) ? 'C' : 'O';
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fprintf (repo_file, "%c %s\n", type, IDENTIFIER_POINTER (val));
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}
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out:
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if (repo_file)
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fclose (repo_file);
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}
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#include "gt-cp-repo.h"
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