/* Code to maintain a C++ template repository.
- Copyright (C) 1995 Free Software Foundation, Inc.
+ Copyright (C) 1995, 1996, 1997, 1998, 2000, 2001, 2002, 2003, 2004, 2005,
+ 2006, 2007, 2008 Free Software Foundation, Inc.
Contributed by Jason Merrill (jason@cygnus.com)
-This file is part of GNU CC.
+This file is part of GCC.
-GNU CC is free software; you can redistribute it and/or modify
+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 2, or (at your option)
+the Free Software Foundation; either version 3, or (at your option)
any later version.
-GNU CC is distributed in the hope that it will be useful,
+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 GNU CC; see the file COPYING. If not, write to
-the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA. */
+along with GCC; see the file COPYING3. If not see
+<http://www.gnu.org/licenses/>. */
/* My strategy here is as follows:
Everything should be emitted in a translation unit where it is used.
The results of the automatic process should be easily reproducible with
- explicit code.
+ explicit code. */
- I'm thinking of compiling with -frepo, running a Perl script to update
- files, and then being able to rebuild everything with -fno-implicit.
- Full automation can come later. */
-
-#include <stdio.h>
+#include "config.h"
+#include "system.h"
+#include "coretypes.h"
+#include "tm.h"
#include "tree.h"
#include "cp-tree.h"
#include "input.h"
+#include "obstack.h"
+#include "toplev.h"
+#include "diagnostic.h"
+#include "flags.h"
-extern char * rindex ();
-
-static tree pending_repo;
-static char repo_name[1024];
-static FILE *repo_file;
+static const char *extract_string (const char **);
+static const char *get_base_filename (const char *);
+static FILE *open_repo_file (const char *);
+static char *afgets (FILE *);
+static FILE *reopen_repo_file_for_write (void);
-extern int flag_use_repository;
-extern int errorcount, sorrycount;
+static GTY(()) tree pending_repo;
+static char *repo_name;
-static int repo_changed;
+static const char *old_args, *old_dir, *old_main;
-#define IDENTIFIER_REPO_USED(NODE) (TREE_LANG_FLAG_3 (NODE))
-#define IDENTIFIER_REPO_CHOSEN(NODE) (TREE_LANG_FLAG_4 (NODE))
+static struct obstack temporary_obstack;
+static bool temporary_obstack_initialized_p;
-/* Record the flags used to compile this translation unit. */
+/* Parse a reasonable subset of shell quoting syntax. */
-void
-repo_compile_flags (argc, argv)
- int argc;
- char **argv;
+static const char *
+extract_string (const char **pp)
{
-}
-
-/* If this template has not been seen before, add a note to the repository
- saying where the declaration was. This may be used to find the
- definition at link time. */
-
-void
-repo_template_declared (t)
- tree t;
-{}
-
-/* Note where the definition of a template lives so that instantiations can
- be generated later. */
-
-void
-repo_template_defined (t)
- tree t;
-{}
-
-/* Note where the definition of a class lives to that template
- instantiations can use it. */
+ const char *p = *pp;
+ int backquote = 0;
+ int inside = 0;
-void
-repo_class_defined (t)
- tree t;
-{}
-
-/* Note that a template has been used. If we can see the definition, offer
- to emit it. */
-
-void
-repo_template_used (t)
- tree t;
-{
- tree id;
-
- if (! flag_use_repository)
- return;
-
- if (TREE_CODE_CLASS (TREE_CODE (t)) == 't')
+ for (;;)
{
- id = DECL_ASSEMBLER_NAME (TYPE_MAIN_DECL (t));
- if (IDENTIFIER_REPO_CHOSEN (id))
- mark_class_instantiated (t, 0);
- }
- else if (TREE_CODE_CLASS (TREE_CODE (t)) == 'd')
- {
- id = DECL_ASSEMBLER_NAME (t);
- if (IDENTIFIER_REPO_CHOSEN (id))
- mark_function_instantiated (t, 0);
+ char c = *p;
+ if (c == '\0')
+ break;
+ ++p;
+ if (backquote)
+ {
+ obstack_1grow (&temporary_obstack, c);
+ backquote = 0;
+ }
+ else if (! inside && c == ' ')
+ break;
+ else if (! inside && c == '\\')
+ backquote = 1;
+ else if (c == '\'')
+ inside = !inside;
+ else
+ obstack_1grow (&temporary_obstack, c);
}
- else
- my_friendly_abort (1);
- if (! IDENTIFIER_REPO_USED (id))
- {
- repo_changed = 1;
- IDENTIFIER_REPO_USED (id) = 1;
- }
- pending_repo = perm_tree_cons (NULL_TREE, t, pending_repo);
+ obstack_1grow (&temporary_obstack, '\0');
+ *pp = p;
+ return (char *) obstack_finish (&temporary_obstack);
}
-/* Note that the vtable for a class has been used, and offer to emit it. */
-
-void
-repo_vtable_used (t)
- tree t;
+static const char *
+get_base_filename (const char *filename)
{
- if (! flag_use_repository)
- return;
+ const char *p = getenv ("COLLECT_GCC_OPTIONS");
+ const char *output = NULL;
+ int compiling = 0;
- pending_repo = perm_tree_cons (NULL_TREE, t, pending_repo);
-}
+ while (p && *p)
+ {
+ const char *q = extract_string (&p);
-/* Note that an inline with external linkage has been used, and offer to
- emit it. */
+ if (strcmp (q, "-o") == 0)
+ {
+ if (flag_compare_debug)
+ /* Just in case aux_base_name was based on a name with two
+ or more '.'s, add an arbitrary extension that will be
+ stripped by the caller. */
+ output = concat (aux_base_name, ".o", NULL);
+ else
+ output = extract_string (&p);
+ }
+ else if (strcmp (q, "-c") == 0)
+ compiling = 1;
+ }
-void
-repo_inline_used (fn)
- tree fn;
-{
- if (! flag_use_repository)
- return;
+ if (compiling && output)
+ return output;
- /* Member functions of polymorphic classes go with their vtables. */
- if (DECL_FUNCTION_MEMBER_P (fn) && TYPE_VIRTUAL_P (DECL_CLASS_CONTEXT (fn)))
+ if (p && ! compiling)
{
- repo_vtable_used (DECL_CLASS_CONTEXT (fn));
- return;
+ warning (0, "-frepo must be used with -c");
+ flag_use_repository = 0;
+ return NULL;
}
- pending_repo = perm_tree_cons (NULL_TREE, fn, pending_repo);
+ return lbasename (filename);
}
-/* Note that a particular typeinfo node has been used, and offer to
- emit it. */
-
-void
-repo_tinfo_used (ti)
- tree ti;
+static FILE *
+open_repo_file (const char *filename)
{
-}
+ const char *p;
+ const char *s = get_base_filename (filename);
-static void
-open_repo_file (filename)
- char *filename;
-{
- register char *p, *q;
- char *file = filename;
- char *s = rindex (file, '/');
if (s == NULL)
- s = file;
- else
- ++s;
+ return NULL;
+
+ p = lbasename (s);
+ p = strrchr (p, '.');
+ if (! p)
+ p = s + strlen (s);
- for (p = repo_name, q = file; q < s; )
- *p++ = *q++;
- *p++ = '.';
- strcpy (p, q);
- strcat (p, ".repo");
+ repo_name = XNEWVEC (char, p - s + 5);
+ memcpy (repo_name, s, p - s);
+ memcpy (repo_name + (p - s), ".rpo", 5);
- repo_file = fopen (repo_name, "r");
+ return fopen (repo_name, "r");
+}
+
+static char *
+afgets (FILE *stream)
+{
+ int c;
+ while ((c = getc (stream)) != EOF && c != '\n')
+ obstack_1grow (&temporary_obstack, c);
+ if (obstack_object_size (&temporary_obstack) == 0)
+ return NULL;
+ obstack_1grow (&temporary_obstack, '\0');
+ return (char *) obstack_finish (&temporary_obstack);
}
void
-init_repo (filename)
- char *filename;
+init_repo (void)
{
- char buf[1024];
+ char *buf;
+ const char *p;
+ FILE *repo_file;
if (! flag_use_repository)
return;
- open_repo_file (filename);
+ /* When a PCH file is loaded, the entire identifier table is
+ replaced, with the result that IDENTIFIER_REPO_CHOSEN is cleared.
+ So, we have to reread the repository file. */
+ lang_post_pch_load = init_repo;
+
+ if (!temporary_obstack_initialized_p)
+ gcc_obstack_init (&temporary_obstack);
+
+ repo_file = open_repo_file (main_input_filename);
if (repo_file == 0)
return;
- while (fgets (buf, 1024, repo_file))
+ while ((buf = afgets (repo_file)))
{
- int len = strlen (buf) - 1;
- if (buf[len] != '\n')
- error ("repository info line too long in %s", repo_name);
- buf[len] = '\0';
-
switch (buf[0])
{
case 'A':
+ old_args = ggc_strdup (buf + 2);
+ break;
+ case 'D':
+ old_dir = ggc_strdup (buf + 2);
+ break;
case 'M':
+ old_main = ggc_strdup (buf + 2);
break;
- case 'C':
case 'O':
+ /* A symbol that we were able to define the last time this
+ file was compiled. */
+ break;
+ case 'C':
+ /* A symbol that the prelinker has requested that we
+ define. */
{
- tree id = get_identifier (&buf[2]);
- IDENTIFIER_REPO_USED (id) = 1;
- if (buf[0] == 'C')
- IDENTIFIER_REPO_CHOSEN (id) = 1;
+ tree id = get_identifier (buf + 2);
+ IDENTIFIER_REPO_CHOSEN (id) = 1;
}
break;
default:
error ("mysterious repository information in %s", repo_name);
}
+ obstack_free (&temporary_obstack, buf);
}
+ fclose (repo_file);
+
+ if (old_args && !get_random_seed (true)
+ && (p = strstr (old_args, "'-frandom-seed=")))
+ set_random_seed (extract_string (&p) + strlen ("-frandom-seed="));
}
-static void
-reopen_repo_file_for_write ()
+static FILE *
+reopen_repo_file_for_write (void)
{
- if (repo_file)
- fclose (repo_file);
- repo_file = fopen (repo_name, "w");
+ FILE *repo_file = fopen (repo_name, "w");
if (repo_file == 0)
{
- error ("man't create repository information file `%s'", repo_name);
+ error ("can't create repository information file %qs", repo_name);
flag_use_repository = 0;
}
+
+ return repo_file;
}
/* Emit any pending repos. */
void
-finish_repo ()
+finish_repo (void)
{
tree t;
- int changed = 0;
+ char *dir, *args;
+ FILE *repo_file;
- if (! flag_use_repository)
+ if (!flag_use_repository || flag_compare_debug)
return;
- /* Do we have to write out a new info file? */
-
- if (! repo_changed || errorcount || sorrycount)
- goto out;
-
- reopen_repo_file_for_write ();
+ if (errorcount || sorrycount)
+ return;
+ repo_file = reopen_repo_file_for_write ();
if (repo_file == 0)
goto out;
+ fprintf (repo_file, "M %s\n", main_input_filename);
+ dir = getpwd ();
+ fprintf (repo_file, "D %s\n", dir);
+ args = getenv ("COLLECT_GCC_OPTIONS");
+ if (args)
+ {
+ fprintf (repo_file, "A %s", args);
+ /* If -frandom-seed is not among the ARGS, then add the value
+ that we chose. That will ensure that the names of types from
+ anonymous namespaces will get the same mangling when this
+ file is recompiled. */
+ if (!strstr (args, "'-frandom-seed="))
+ fprintf (repo_file, " '-frandom-seed=%s'", get_random_seed (false));
+ fprintf (repo_file, "\n");
+ }
+
for (t = pending_repo; t; t = TREE_CHAIN (t))
{
tree val = TREE_VALUE (t);
- char type;
+ tree name = DECL_ASSEMBLER_NAME (val);
+ char type = IDENTIFIER_REPO_CHOSEN (name) ? 'C' : 'O';
+ fprintf (repo_file, "%c %s\n", type, IDENTIFIER_POINTER (name));
+ }
- if (TREE_CODE_CLASS (TREE_CODE (val)) == 't')
- val = TYPE_MAIN_DECL (val);
- val = DECL_ASSEMBLER_NAME (val);
+ out:
+ if (repo_file)
+ fclose (repo_file);
+}
+
+/* DECL is a FUNCTION_DECL or VAR_DECL with vague linkage whose
+ definition is available in this translation unit. Returns 0 if
+ this definition should not be emitted in this translation unit
+ because it will be emitted elsewhere. Returns 1 if the repository
+ file indicates that that DECL should be emitted in this translation
+ unit, or 2 if the repository file is not in use. */
+
+int
+repo_emit_p (tree decl)
+{
+ int ret = 0;
+ gcc_assert (TREE_PUBLIC (decl));
+ gcc_assert (TREE_CODE (decl) == FUNCTION_DECL
+ || TREE_CODE (decl) == VAR_DECL);
+ gcc_assert (!DECL_REALLY_EXTERN (decl));
+
+ /* When not using the repository, emit everything. */
+ if (!flag_use_repository)
+ return 2;
+
+ /* Only template instantiations are managed by the repository. This
+ is an artificial restriction; the code in the prelinker and here
+ will work fine if all entities with vague linkage are managed by
+ the repository. */
+ if (TREE_CODE (decl) == VAR_DECL)
+ {
+ tree type = NULL_TREE;
+ if (DECL_VTABLE_OR_VTT_P (decl))
+ type = DECL_CONTEXT (decl);
+ else if (DECL_TINFO_P (decl))
+ type = TREE_TYPE (DECL_NAME (decl));
+ if (!DECL_TEMPLATE_INSTANTIATION (decl)
+ && (!TYPE_LANG_SPECIFIC (type)
+ || !CLASSTYPE_TEMPLATE_INSTANTIATION (type)))
+ return 2;
+ /* Const static data members initialized by constant expressions must
+ be processed where needed so that their definitions are
+ available. Still record them into *.rpo files, so if they
+ weren't actually emitted and collect2 requests them, they can
+ be provided. */
+ if (DECL_INTEGRAL_CONSTANT_VAR_P (decl)
+ && DECL_CLASS_SCOPE_P (decl))
+ ret = 2;
+ }
+ else if (!DECL_TEMPLATE_INSTANTIATION (decl))
+ return 2;
- if (! IDENTIFIER_REPO_USED (val))
- continue;
- IDENTIFIER_REPO_USED (val) = 0;
+ if (DECL_EXPLICIT_INSTANTIATION (decl))
+ return 2;
- type = IDENTIFIER_REPO_CHOSEN (val) ? 'C' : 'O';
+ /* For constructors and destructors, the repository contains
+ information about the clones -- not the original function --
+ because only the clones are emitted in the object file. */
+ if (DECL_MAYBE_IN_CHARGE_CONSTRUCTOR_P (decl)
+ || DECL_MAYBE_IN_CHARGE_DESTRUCTOR_P (decl))
+ {
+ int emit_p = 0;
+ tree clone;
+ /* There is no early exit from this loop because we want to
+ ensure that all of the clones are marked as available in this
+ object file. */
+ FOR_EACH_CLONE (clone, decl)
+ /* The only possible results from the recursive call to
+ repo_emit_p are 0 or 1. */
+ if (repo_emit_p (clone))
+ emit_p = 1;
+ return emit_p;
+ }
- fprintf (repo_file, "%c %s\n", type, IDENTIFIER_POINTER (val));
+ /* Keep track of all available entities. */
+ if (!DECL_REPO_AVAILABLE_P (decl))
+ {
+ DECL_REPO_AVAILABLE_P (decl) = 1;
+ pending_repo = tree_cons (NULL_TREE, decl, pending_repo);
}
- out:
- if (repo_file)
- fclose (repo_file);
+ return IDENTIFIER_REPO_CHOSEN (DECL_ASSEMBLER_NAME (decl)) ? 1 : ret;
}
+
+/* Returns true iff the prelinker has explicitly marked CLASS_TYPE for
+ export from this translation unit. */
+
+bool
+repo_export_class_p (const_tree class_type)
+{
+ if (!flag_use_repository)
+ return false;
+ if (!CLASSTYPE_VTABLES (class_type))
+ return false;
+ /* If the virtual table has been assigned to this translation unit,
+ export the class. */
+ return (IDENTIFIER_REPO_CHOSEN
+ (DECL_ASSEMBLER_NAME (CLASSTYPE_VTABLES (class_type))));
+}
+
+#include "gt-cp-repo.h"
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