/* Part of CPP library. (Precompiled header reading/writing.)
- Copyright (C) 2000, 2001, 2002, 2003, 2004, 2005
+ Copyright (C) 2000, 2001, 2002, 2003, 2004, 2005, 2008, 2009
Free Software Foundation, Inc.
This program 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) any
+Free Software Foundation; either version 3, or (at your option) any
later version.
This program is distributed in the hope that it will be useful,
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
-along with this program; if not, write to the Free Software
-Foundation, 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */
+along with this program; see the file COPYING3. If not see
+<http://www.gnu.org/licenses/>. */
#include "config.h"
#include "system.h"
static int save_macros (cpp_reader *, cpp_hashnode *, void *);
/* This structure represents a macro definition on disk. */
-struct macrodef_struct
+struct macrodef_struct
{
unsigned int definition_length;
unsigned short name_length;
unsigned short flags;
};
-/* This is how we write out a macro definition.
+/* This is how we write out a macro definition.
Suitable for being called by cpp_forall_identifiers. */
static int
case NT_VOID:
if (! (hn->flags & NODE_POISONED))
return 1;
-
+
case NT_MACRO:
if ((hn->flags & NODE_BUILTIN))
return 1;
defn = NODE_NAME (hn);
s.definition_length = s.name_length;
}
-
+
if (fwrite (&s, sizeof (s), 1, f) != 1
|| fwrite (defn, 1, s.definition_length, f) != s.definition_length)
{
}
}
return 1;
-
+
case NT_ASSERTION:
/* Not currently implemented. */
return 1;
save_idents (cpp_reader *pfile ATTRIBUTE_UNUSED, cpp_hashnode *hn, void *ss_p)
{
struct cpp_savedstate *const ss = (struct cpp_savedstate *)ss_p;
-
+
if (hn->type != NT_VOID)
{
struct cpp_string news;
{
struct cpp_string *sp;
unsigned char *text;
-
+
sp = XNEW (struct cpp_string);
*slot = sp;
const unsigned char *p = (const unsigned char *)p_p;
size_t i;
hashval_t h;
-
+
h = 0;
for (i = 0; i < sz; i++)
h = h * 67 - (*p++ - 113);
{
/* Save the list of non-void identifiers for the dependency checking. */
r->savedstate = XNEW (struct cpp_savedstate);
- r->savedstate->definedhash = htab_create (100, cpp_string_hash,
+ r->savedstate->definedhash = htab_create (100, cpp_string_hash,
cpp_string_eq, NULL);
cpp_forall_identifiers (r, save_idents, r->savedstate);
-
+
/* Write out the list of defined identifiers. */
cpp_forall_identifiers (r, write_macdef, f);
count_defs (cpp_reader *pfile ATTRIBUTE_UNUSED, cpp_hashnode *hn, void *ss_p)
{
struct cpp_savedstate *const ss = (struct cpp_savedstate *)ss_p;
-
+
switch (hn->type)
{
case NT_MACRO:
if (hn->flags & NODE_BUILTIN)
return 1;
-
+
/* else fall through. */
case NT_VOID:
{
struct cpp_string news;
void **slot;
-
+
news.len = NODE_LEN (hn);
news.text = NODE_NAME (hn);
slot = (void **) htab_find (ss->definedhash, &news);
write_defs (cpp_reader *pfile ATTRIBUTE_UNUSED, cpp_hashnode *hn, void *ss_p)
{
struct cpp_savedstate *const ss = (struct cpp_savedstate *)ss_p;
-
+
switch (hn->type)
{
case NT_MACRO:
if (hn->flags & NODE_BUILTIN)
return 1;
-
+
/* else fall through. */
case NT_VOID:
{
struct cpp_string news;
void **slot;
-
+
news.len = NODE_LEN (hn);
news.text = NODE_NAME (hn);
slot = (void **) htab_find (ss->definedhash, &news);
struct cpp_savedstate *const ss = r->savedstate;
unsigned char *definedstrs;
size_t i;
-
+
/* Collect the list of identifiers which have been seen and
weren't defined to anything previously. */
ss->hashsize = 0;
/* Free the saved state. */
free (ss);
r->savedstate = NULL;
+
+ /* Save the next value of __COUNTER__. */
+ if (fwrite (&r->counter, sizeof (r->counter), 1, f) != 1)
+ {
+ cpp_errno (r, CPP_DL_ERROR, "while writing precompiled header");
+ return -1;
+ }
+
return 0;
}
return -1;
}
+ /* Save the next __COUNTER__ value. When we include a precompiled header,
+ we need to start at the offset we would have if the header had been
+ included normally. */
+ if (fwrite (&r->counter, sizeof (r->counter), 1, f) != 1)
+ {
+ cpp_errno (r, CPP_DL_ERROR, "while writing precompiled header");
+ return -1;
+ }
+
return 0;
}
with the preprocessor's current definitions. It will be consistent
when:
- - anything that was defined just before the PCH was generated
+ - anything that was defined just before the PCH was generated
is defined the same way now; and
- anything that was not defined then, but is defined now, was not
used by the PCH.
struct ht_node_list nl = { 0, 0, 0 };
unsigned char *first, *last;
unsigned int i;
-
+ unsigned int counter;
+
/* Read in the list of identifiers that must be defined
Check that they are defined in the same way. */
for (;;)
{
cpp_hashnode *h;
const unsigned char *newdefn;
-
+
if (read (fd, &m, sizeof (m)) != sizeof (m))
goto error;
-
+
if (m.name_length == 0)
break;
namebuf = XNEWVEC (unsigned char, namebufsz);
}
- if ((size_t)read (fd, namebuf, m.definition_length)
+ if ((size_t)read (fd, namebuf, m.definition_length)
!= m.definition_length)
goto error;
-
+
h = cpp_lookup (r, namebuf, m.name_length);
if (m.flags & NODE_POISONED
- || h->type != NT_MACRO
|| h->flags & NODE_POISONED)
{
if (CPP_OPTION (r, warn_invalid_pch))
cpp_error (r, CPP_DL_WARNING_SYSHDR,
+ "%s: not used because `%.*s' is poisoned",
+ name, m.name_length, namebuf);
+ goto fail;
+ }
+
+ if (h->type != NT_MACRO)
+ {
+ /* It's ok if __GCC_HAVE_DWARF2_CFI_ASM becomes undefined,
+ as in, when the PCH file is created with -g and we're
+ attempting to use it without -g. Restoring the PCH file
+ is supposed to bring in this definition *and* enable the
+ generation of call frame information, so that precompiled
+ definitions that take this macro into accout, to decide
+ what asm to emit, won't issue .cfi directives when the
+ compiler doesn't. */
+ if (!(h->flags & NODE_USED)
+ && m.name_length == sizeof ("__GCC_HAVE_DWARF2_CFI_ASM") - 1
+ && !memcmp (namebuf, "__GCC_HAVE_DWARF2_CFI_ASM", m.name_length))
+ continue;
+
+ if (CPP_OPTION (r, warn_invalid_pch))
+ cpp_error (r, CPP_DL_WARNING_SYSHDR,
"%s: not used because `%.*s' not defined",
name, m.name_length, namebuf);
goto fail;
}
newdefn = cpp_macro_definition (r, h);
-
+
if (m.definition_length != ustrlen (newdefn)
|| memcmp (namebuf, newdefn, m.definition_length) != 0)
{
nl.defs = XNEWVEC (cpp_hashnode *, nl.asize);
cpp_forall_identifiers (r, &collect_ht_nodes, &nl);
qsort (nl.defs, nl.n_defs, sizeof (cpp_hashnode *), &comp_hashnodes);
-
+
/* Loop through nl.defs and undeftab, both of which are sorted lists.
There should be no matches. */
first = undeftab;
last = undeftab + m.definition_length;
i = 0;
-
+
while (first < last && i < nl.n_defs)
{
int cmp = ustrcmp (first, NODE_NAME (nl.defs[i]));
-
+
if (cmp < 0)
first += ustrlen (first) + 1;
else if (cmp > 0)
else
{
if (CPP_OPTION (r, warn_invalid_pch))
- cpp_error (r, CPP_DL_WARNING_SYSHDR,
+ cpp_error (r, CPP_DL_WARNING_SYSHDR,
"%s: not used because `%s' is defined",
name, first);
goto fail;
}
}
-
+
free(nl.defs);
+ nl.defs = NULL;
free (undeftab);
+ undeftab = NULL;
+
+ /* Read in the next value of __COUNTER__.
+ Check that (a) __COUNTER__ was not used in the pch or (b) __COUNTER__
+ has not been used in this translation unit. */
+ if (read (fd, &counter, sizeof (counter)) != sizeof (counter))
+ goto error;
+ if (counter && r->counter)
+ {
+ if (CPP_OPTION (r, warn_invalid_pch))
+ cpp_error (r, CPP_DL_WARNING_SYSHDR,
+ "%s: not used because `__COUNTER__' is invalid",
+ name);
+ goto fail;
+ }
/* We win! */
return 0;
/* Save all the existing macros. */
-struct save_macro_data
+struct save_macro_data
{
uchar **defns;
size_t count;
file were not saved in this way, but this is not done (yet), except
for builtins, and for #assert by default. */
-static int
+static int
save_macros (cpp_reader *r, cpp_hashnode *h, void *data_p)
{
struct save_macro_data *data = (struct save_macro_data *)data_p;
if (data->count == data->array_size)
{
data->array_size *= 2;
- data->defns = XRESIZEVEC (uchar *, data->defns, (data->array_size));
+ data->defns = XRESIZEVEC (uchar *, data->defns, (data->array_size));
}
-
+
switch (h->type)
{
case NT_ASSERTION:
data->defns[data->count][defnlen] = '\n';
}
break;
-
+
default:
abort ();
}
cpp_prepare_state (cpp_reader *r, struct save_macro_data **data)
{
struct save_macro_data *d = XNEW (struct save_macro_data);
-
+
d->array_size = 512;
d->defns = XNEWVEC (uchar *, d->array_size);
d->count = 0;
}
/* Given a precompiled header that was previously determined to be valid,
- apply all its definitions (and undefinitions) to the current state.
+ apply all its definitions (and undefinitions) to the current state.
DEPNAME is passed to deps_restore. */
int
{
size_t i;
struct lexer_state old_state;
+ unsigned int counter;
- /* Restore spec_nodes, which will be full of references to the old
+ /* Restore spec_nodes, which will be full of references to the old
hashtable entries and so will now be invalid. */
{
struct spec_nodes *s = &r->spec_nodes;
if (! _cpp_read_file_entries (r, f))
goto error;
+ if (fread (&counter, sizeof (counter), 1, f) != 1)
+ goto error;
+
+ if (!r->counter)
+ r->counter = counter;
+
return 0;
-
+
error:
cpp_errno (r, CPP_DL_ERROR, "while reading precompiled header");
return -1;
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