diff options
Diffstat (limited to 'gcc-4.2.1-5666.3/libcpp/pch.c')
| -rw-r--r-- | gcc-4.2.1-5666.3/libcpp/pch.c | 728 |
1 files changed, 0 insertions, 728 deletions
diff --git a/gcc-4.2.1-5666.3/libcpp/pch.c b/gcc-4.2.1-5666.3/libcpp/pch.c deleted file mode 100644 index e925d81be..000000000 --- a/gcc-4.2.1-5666.3/libcpp/pch.c +++ /dev/null @@ -1,728 +0,0 @@ -/* Part of CPP library. (Precompiled header reading/writing.) - Copyright (C) 2000, 2001, 2002, 2003, 2004, 2005 - 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 -later version. - -This program 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 this program; if not, write to the Free Software -Foundation, 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. */ - -#include "config.h" -#include "system.h" -#include "cpplib.h" -#include "internal.h" -#include "hashtab.h" -#include "mkdeps.h" - -static int write_macdef (cpp_reader *, cpp_hashnode *, void *); -static int save_idents (cpp_reader *, cpp_hashnode *, void *); -static hashval_t hashmem (const void *, size_t); -static hashval_t cpp_string_hash (const void *); -static int cpp_string_eq (const void *, const void *); -static int count_defs (cpp_reader *, cpp_hashnode *, void *); -static int comp_hashnodes (const void *, const void *); -static int collect_ht_nodes (cpp_reader *, cpp_hashnode *, void *); -static int write_defs (cpp_reader *, cpp_hashnode *, void *); -static int save_macros (cpp_reader *, cpp_hashnode *, void *); - -/* This structure represents a macro definition on disk. */ -struct macrodef_struct -{ - unsigned int definition_length; - unsigned short name_length; - unsigned short flags; -}; - -/* This is how we write out a macro definition. - Suitable for being called by cpp_forall_identifiers. */ - -static int -write_macdef (cpp_reader *pfile, cpp_hashnode *hn, void *file_p) -{ - FILE *f = (FILE *) file_p; - switch (hn->type) - { - case NT_VOID: - if (! (hn->flags & NODE_POISONED)) - return 1; - - case NT_MACRO: - if ((hn->flags & NODE_BUILTIN)) - return 1; - - { - struct macrodef_struct s; - const unsigned char *defn; - - s.name_length = NODE_LEN (hn); - s.flags = hn->flags & NODE_POISONED; - - if (hn->type == NT_MACRO) - { - defn = cpp_macro_definition (pfile, hn); - s.definition_length = ustrlen (defn); - } - else - { - 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) - { - cpp_errno (pfile, CPP_DL_ERROR, - "while writing precompiled header"); - return 0; - } - } - return 1; - - case NT_ASSERTION: - /* Not currently implemented. */ - return 1; - - default: - abort (); - } -} - -/* This structure records the names of the defined macros. - It's also used as a callback structure for size_initial_idents - and save_idents. */ - -struct cpp_savedstate -{ - /* A hash table of the defined identifiers. */ - htab_t definedhash; - /* The size of the definitions of those identifiers (the size of - 'definedstrs'). */ - size_t hashsize; - /* Number of definitions */ - size_t n_defs; - /* Array of definitions. In cpp_write_pch_deps it is used for sorting. */ - cpp_hashnode **defs; - /* Space for the next definition. Definitions are null-terminated - strings. */ - unsigned char *definedstrs; -}; - -/* Save this identifier into the state: put it in the hash table, - put the definition in 'definedstrs'. */ - -static int -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; - void **slot; - - news.len = NODE_LEN (hn); - news.text= NODE_NAME (hn); - slot = htab_find_slot (ss->definedhash, &news, INSERT); - if (*slot == NULL) - { - struct cpp_string *sp; - unsigned char *text; - - sp = XNEW (struct cpp_string); - *slot = sp; - - sp->len = NODE_LEN (hn); - sp->text = text = XNEWVEC (unsigned char, NODE_LEN (hn)); - memcpy (text, NODE_NAME (hn), NODE_LEN (hn)); - } - } - - return 1; -} - -/* Hash some memory in a generic way. */ - -static hashval_t -hashmem (const void *p_p, size_t sz) -{ - 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); - return h; -} - -/* Hash a cpp string for the hashtable machinery. */ - -static hashval_t -cpp_string_hash (const void *a_p) -{ - const struct cpp_string *a = (const struct cpp_string *) a_p; - return hashmem (a->text, a->len); -} - -/* Compare two cpp strings for the hashtable machinery. */ - -static int -cpp_string_eq (const void *a_p, const void *b_p) -{ - const struct cpp_string *a = (const struct cpp_string *) a_p; - const struct cpp_string *b = (const struct cpp_string *) b_p; - return (a->len == b->len - && memcmp (a->text, b->text, a->len) == 0); -} - -/* Save the current definitions of the cpp_reader for dependency - checking purposes. When writing a precompiled header, this should - be called at the same point in the compilation as cpp_valid_state - would be called when reading the precompiled header back in. */ - -int -cpp_save_state (cpp_reader *r, FILE *f) -{ - /* 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, - 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); - - return 0; -} - -/* Calculate the 'hashsize' field of the saved state. */ - -static int -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); - if (slot == NULL) - { - ss->hashsize += NODE_LEN (hn) + 1; - ss->n_defs += 1; - } - } - return 1; - - case NT_ASSERTION: - /* Not currently implemented. */ - return 1; - - default: - abort (); - } -} - -/* Collect the identifiers into the state's string table. */ -static int -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); - if (slot == NULL) - { - ss->defs[ss->n_defs] = hn; - ss->n_defs += 1; - } - } - return 1; - - case NT_ASSERTION: - /* Not currently implemented. */ - return 1; - - default: - abort (); - } -} - -/* Comparison function for qsort. The arguments point to pointers of - type ht_hashnode *. */ -static int -comp_hashnodes (const void *px, const void *py) -{ - cpp_hashnode *x = *(cpp_hashnode **) px; - cpp_hashnode *y = *(cpp_hashnode **) py; - return ustrcmp (NODE_NAME (x), NODE_NAME (y)); -} - -/* Write out the remainder of the dependency information. This should be - called after the PCH is ready to be saved. */ - -int -cpp_write_pch_deps (cpp_reader *r, FILE *f) -{ - struct macrodef_struct z; - 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; - ss->n_defs = 0; - cpp_forall_identifiers (r, count_defs, ss); - - ss->defs = XNEWVEC (cpp_hashnode *, ss->n_defs); - ss->n_defs = 0; - cpp_forall_identifiers (r, write_defs, ss); - - /* Sort the list, copy it into a buffer, and write it out. */ - qsort (ss->defs, ss->n_defs, sizeof (cpp_hashnode *), &comp_hashnodes); - definedstrs = ss->definedstrs = XNEWVEC (unsigned char, ss->hashsize); - for (i = 0; i < ss->n_defs; ++i) - { - size_t len = NODE_LEN (ss->defs[i]); - memcpy (definedstrs, NODE_NAME (ss->defs[i]), len + 1); - definedstrs += len + 1; - } - - memset (&z, 0, sizeof (z)); - z.definition_length = ss->hashsize; - if (fwrite (&z, sizeof (z), 1, f) != 1 - || fwrite (ss->definedstrs, ss->hashsize, 1, f) != 1) - { - cpp_errno (r, CPP_DL_ERROR, "while writing precompiled header"); - return -1; - } - free (ss->definedstrs); - - /* Free the saved state. */ - free (ss); - r->savedstate = NULL; - return 0; -} - -/* Write out the definitions of the preprocessor, in a form suitable for - cpp_read_state. */ - -int -cpp_write_pch_state (cpp_reader *r, FILE *f) -{ - if (!r->deps) - r->deps = deps_init (); - - if (deps_save (r->deps, f) != 0) - { - cpp_errno (r, CPP_DL_ERROR, "while writing precompiled header"); - return -1; - } - - if (! _cpp_save_file_entries (r, f)) - { - cpp_errno (r, CPP_DL_ERROR, "while writing precompiled header"); - return -1; - } - - return 0; -} - - -/* Data structure to transform hash table nodes into a sorted list */ - -struct ht_node_list -{ - /* Array of nodes */ - cpp_hashnode **defs; - /* Number of nodes in the array */ - size_t n_defs; - /* Size of the allocated array */ - size_t asize; -}; - -/* Callback for collecting identifiers from hash table */ - -static int -collect_ht_nodes (cpp_reader *pfile ATTRIBUTE_UNUSED, cpp_hashnode *hn, - void *nl_p) -{ - struct ht_node_list *const nl = (struct ht_node_list *)nl_p; - - if (hn->type != NT_VOID || hn->flags & NODE_POISONED) - { - if (nl->n_defs == nl->asize) - { - nl->asize *= 2; - nl->defs = XRESIZEVEC (cpp_hashnode *, nl->defs, nl->asize); - } - - nl->defs[nl->n_defs] = hn; - ++nl->n_defs; - } - return 1; -} - - -/* Return nonzero if FD is a precompiled header which is consistent - with the preprocessor's current definitions. It will be consistent - when: - - - 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. - - NAME is used to print warnings if `warn_invalid_pch' is set in the - reader's flags. -*/ - -int -cpp_valid_state (cpp_reader *r, const char *name, int fd) -{ - struct macrodef_struct m; - size_t namebufsz = 256; - unsigned char *namebuf = XNEWVEC (unsigned char, namebufsz); - unsigned char *undeftab = NULL; - struct ht_node_list nl = { 0, 0, 0 }; - unsigned char *first, *last; - unsigned int i; - /* APPLE LOCAL begin pch distcc --mrs */ - int skip_validation; - - /* Skip pch validation if we have just validated it. */ - skip_validation = CPP_OPTION (r, pch_preprocess) - && CPP_OPTION (r, preprocessed); - /* APPLE LOCAL end pch distcc --mrs */ - - /* 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; - - /* If this file is already preprocessed, there won't be any - macros defined, and that's OK. */ - if (CPP_OPTION (r, preprocessed)) - { - if (lseek (fd, m.definition_length, SEEK_CUR) == -1) - goto error; - continue; - } - - if (m.definition_length > namebufsz) - { - free (namebuf); - namebufsz = m.definition_length + 256; - namebuf = XNEWVEC (unsigned char, namebufsz); - } - - if ((size_t)read (fd, namebuf, m.definition_length) - != m.definition_length) - goto error; - - /* APPLE LOCAL begin pch distcc --mrs */ - if (skip_validation) - continue; - /* APPLE LOCAL end pch distcc --mrs */ - - 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' 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) - { - if (CPP_OPTION (r, warn_invalid_pch)) - cpp_error (r, CPP_DL_WARNING_SYSHDR, - "%s: not used because `%.*s' defined as `%s' not `%.*s'", - name, m.name_length, namebuf, newdefn + m.name_length, - m.definition_length - m.name_length, - namebuf + m.name_length); - goto fail; - } - } - free (namebuf); - namebuf = NULL; - - /* Read in the list of identifiers that must not be defined. - Check that they really aren't. */ - undeftab = XNEWVEC (unsigned char, m.definition_length); - if ((size_t) read (fd, undeftab, m.definition_length) != m.definition_length) - goto error; - - /* APPLE LOCAL begin pch distcc --mrs */ - if (skip_validation) - { - free (undeftab); - return 0; - } - /* APPLE LOCAL end pch distcc --mrs */ - - /* Collect identifiers from the current hash table. */ - nl.n_defs = 0; - nl.asize = 10; - 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) - ++i; - else - { - if (CPP_OPTION (r, warn_invalid_pch)) - cpp_error (r, CPP_DL_WARNING_SYSHDR, - "%s: not used because `%s' is defined", - name, first); - goto fail; - } - } - - free(nl.defs); - free (undeftab); - - /* We win! */ - return 0; - - error: - cpp_errno (r, CPP_DL_ERROR, "while reading precompiled header"); - return -1; - - fail: - if (namebuf != NULL) - free (namebuf); - if (undeftab != NULL) - free (undeftab); - if (nl.defs != NULL) - free (nl.defs); - return 1; -} - -/* Save all the existing macros. */ - -struct save_macro_data -{ - uchar **defns; - size_t count; - size_t array_size; - char **saved_pragmas; -}; - -/* Save the definition of a single macro, so that it will persist - across a PCH restore. Because macro data is in GCed memory, which - will be blown away by PCH, it must be temporarily copied to - malloced memory. (The macros will refer to identifier nodes which - are also GCed and so on, so the copying is done by turning them - into self-contained strings.) The assumption is that most macro - definitions will come from the PCH file, not from the compilation - before the PCH file is loaded, so it doesn't matter that this is - a little expensive. - - It would reduce the cost even further if macros defined in the PCH - file were not saved in this way, but this is not done (yet), except - for builtins, and for #assert by default. */ - -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 (h->type != NT_VOID - && (h->flags & NODE_BUILTIN) == 0) - { - if (data->count == data->array_size) - { - data->array_size *= 2; - data->defns = XRESIZEVEC (uchar *, data->defns, (data->array_size)); - } - - switch (h->type) - { - case NT_ASSERTION: - /* Not currently implemented. */ - return 1; - - case NT_MACRO: - { - const uchar * defn = cpp_macro_definition (r, h); - size_t defnlen = ustrlen (defn); - - data->defns[data->count] = (uchar *) xmemdup (defn, defnlen, - defnlen + 2); - data->defns[data->count][defnlen] = '\n'; - } - break; - - default: - abort (); - } - data->count++; - } - return 1; -} - -/* Prepare to restore the state, by saving the currently-defined - macros in 'data'. */ - -void -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; - cpp_forall_identifiers (r, save_macros, d); - d->saved_pragmas = _cpp_save_pragma_names (r); - *data = d; -} - -/* Given a precompiled header that was previously determined to be valid, - apply all its definitions (and undefinitions) to the current state. - DEPNAME is passed to deps_restore. */ - -int -cpp_read_state (cpp_reader *r, const char *name, FILE *f, - struct save_macro_data *data) -{ - size_t i; - struct lexer_state old_state; - - /* APPLE LOCAL begin pch distcc --mrs */ - void (*saved_line_change) PARAMS ((cpp_reader *, const cpp_token *, int)); - - saved_line_change = r->cb.line_change; - /* APPLE LOCAL end pch distcc --mrs */ - - /* 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; - s->n_defined = cpp_lookup (r, DSC("defined")); - s->n_true = cpp_lookup (r, DSC("true")); - s->n_false = cpp_lookup (r, DSC("false")); - s->n__VA_ARGS__ = cpp_lookup (r, DSC("__VA_ARGS__")); - } - - old_state = r->state; - r->state.in_directive = 1; - r->state.prevent_expansion = 1; - r->state.angled_headers = 0; - /* APPLE LOCAL pch distcc --mrs */ - r->cb.line_change = 0; - - /* Run through the carefully-saved macros, insert them. */ - for (i = 0; i < data->count; i++) - { - cpp_hashnode *h; - size_t namelen; - uchar *defn; - - namelen = ustrcspn (data->defns[i], "( \n"); - h = cpp_lookup (r, data->defns[i], namelen); - defn = data->defns[i] + namelen; - - /* The PCH file is valid, so we know that if there is a definition - from the PCH file it must be the same as the one we had - originally, and so do not need to restore it. */ - if (h->type == NT_VOID) - { - if (cpp_push_buffer (r, defn, ustrchr (defn, '\n') - defn, true) - != NULL) - { - _cpp_clean_line (r); - if (!_cpp_create_definition (r, h)) - abort (); - _cpp_pop_buffer (r); - } - else - abort (); - } - - free (data->defns[i]); - } - r->state = old_state; - /* APPLE LOCAL pch distcc --mrs */ - r->cb.line_change = saved_line_change; - - _cpp_restore_pragma_names (r, data->saved_pragmas); - - free (data); - - if (deps_restore (r->deps, f, CPP_OPTION (r, restore_pch_deps) ? name : NULL) - != 0) - goto error; - - if (! _cpp_read_file_entries (r, f)) - goto error; - - return 0; - - error: - cpp_errno (r, CPP_DL_ERROR, "while reading precompiled header"); - return -1; -} |