Mercurial > hg > CbC > CbC_gcc
annotate libcpp/pch.c @ 67:f6334be47118
update gcc from gcc-4.6-20100522 to gcc-4.6-20110318
| author | nobuyasu <dimolto@cr.ie.u-ryukyu.ac.jp> |
|---|---|
| date | Tue, 22 Mar 2011 17:18:12 +0900 |
| parents | b7f97abdc517 |
| children | 04ced10e8804 |
| rev | line source |
|---|---|
| 0 | 1 /* Part of CPP library. (Precompiled header reading/writing.) |
|
67
f6334be47118
update gcc from gcc-4.6-20100522 to gcc-4.6-20110318
nobuyasu <dimolto@cr.ie.u-ryukyu.ac.jp>
parents:
63
diff
changeset
|
2 Copyright (C) 2000, 2001, 2002, 2003, 2004, 2005, 2008, 2009, 2010 |
| 0 | 3 Free Software Foundation, Inc. |
| 4 | |
| 5 This program is free software; you can redistribute it and/or modify it | |
| 6 under the terms of the GNU General Public License as published by the | |
| 7 Free Software Foundation; either version 3, or (at your option) any | |
| 8 later version. | |
| 9 | |
| 10 This program is distributed in the hope that it will be useful, | |
| 11 but WITHOUT ANY WARRANTY; without even the implied warranty of | |
| 12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
| 13 GNU General Public License for more details. | |
| 14 | |
| 15 You should have received a copy of the GNU General Public License | |
| 16 along with this program; see the file COPYING3. If not see | |
| 17 <http://www.gnu.org/licenses/>. */ | |
| 18 | |
| 19 #include "config.h" | |
| 20 #include "system.h" | |
| 21 #include "cpplib.h" | |
| 22 #include "internal.h" | |
| 23 #include "hashtab.h" | |
| 24 #include "mkdeps.h" | |
| 25 | |
| 26 static int write_macdef (cpp_reader *, cpp_hashnode *, void *); | |
| 27 static int save_idents (cpp_reader *, cpp_hashnode *, void *); | |
| 28 static hashval_t hashmem (const void *, size_t); | |
| 29 static hashval_t cpp_string_hash (const void *); | |
| 30 static int cpp_string_eq (const void *, const void *); | |
| 31 static int count_defs (cpp_reader *, cpp_hashnode *, void *); | |
| 32 static int comp_hashnodes (const void *, const void *); | |
| 33 static int collect_ht_nodes (cpp_reader *, cpp_hashnode *, void *); | |
| 34 static int write_defs (cpp_reader *, cpp_hashnode *, void *); | |
| 35 static int save_macros (cpp_reader *, cpp_hashnode *, void *); | |
|
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36 static int _cpp_save_pushed_macros (cpp_reader *, FILE *); |
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37 static int _cpp_restore_pushed_macros (cpp_reader *, FILE *); |
| 0 | 38 |
| 39 /* This structure represents a macro definition on disk. */ | |
| 40 struct macrodef_struct | |
| 41 { | |
| 42 unsigned int definition_length; | |
| 43 unsigned short name_length; | |
| 44 unsigned short flags; | |
| 45 }; | |
| 46 | |
| 47 /* This is how we write out a macro definition. | |
| 48 Suitable for being called by cpp_forall_identifiers. */ | |
| 49 | |
| 50 static int | |
| 51 write_macdef (cpp_reader *pfile, cpp_hashnode *hn, void *file_p) | |
| 52 { | |
| 53 FILE *f = (FILE *) file_p; | |
| 54 switch (hn->type) | |
| 55 { | |
| 56 case NT_VOID: | |
| 57 if (! (hn->flags & NODE_POISONED)) | |
| 58 return 1; | |
| 59 | |
| 60 case NT_MACRO: | |
|
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nobuyasu <dimolto@cr.ie.u-ryukyu.ac.jp>
parents:
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61 if ((hn->flags & NODE_BUILTIN) |
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nobuyasu <dimolto@cr.ie.u-ryukyu.ac.jp>
parents:
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62 && (!pfile->cb.user_builtin_macro |
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nobuyasu <dimolto@cr.ie.u-ryukyu.ac.jp>
parents:
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63 || !pfile->cb.user_builtin_macro (pfile, hn))) |
| 0 | 64 return 1; |
| 65 | |
| 66 { | |
| 67 struct macrodef_struct s; | |
| 68 const unsigned char *defn; | |
| 69 | |
| 70 s.name_length = NODE_LEN (hn); | |
| 71 s.flags = hn->flags & NODE_POISONED; | |
| 72 | |
| 73 if (hn->type == NT_MACRO) | |
| 74 { | |
| 75 defn = cpp_macro_definition (pfile, hn); | |
| 76 s.definition_length = ustrlen (defn); | |
| 77 } | |
| 78 else | |
| 79 { | |
| 80 defn = NODE_NAME (hn); | |
| 81 s.definition_length = s.name_length; | |
| 82 } | |
| 83 | |
| 84 if (fwrite (&s, sizeof (s), 1, f) != 1 | |
| 85 || fwrite (defn, 1, s.definition_length, f) != s.definition_length) | |
| 86 { | |
| 87 cpp_errno (pfile, CPP_DL_ERROR, | |
| 88 "while writing precompiled header"); | |
| 89 return 0; | |
| 90 } | |
| 91 } | |
| 92 return 1; | |
| 93 | |
| 94 case NT_ASSERTION: | |
| 95 /* Not currently implemented. */ | |
| 96 return 1; | |
| 97 | |
| 98 default: | |
| 99 abort (); | |
| 100 } | |
| 101 } | |
| 102 | |
| 103 /* This structure records the names of the defined macros. | |
| 104 It's also used as a callback structure for size_initial_idents | |
| 105 and save_idents. */ | |
| 106 | |
| 107 struct cpp_savedstate | |
| 108 { | |
| 109 /* A hash table of the defined identifiers. */ | |
| 110 htab_t definedhash; | |
| 111 /* The size of the definitions of those identifiers (the size of | |
| 112 'definedstrs'). */ | |
| 113 size_t hashsize; | |
| 114 /* Number of definitions */ | |
| 115 size_t n_defs; | |
| 116 /* Array of definitions. In cpp_write_pch_deps it is used for sorting. */ | |
| 117 cpp_hashnode **defs; | |
| 118 /* Space for the next definition. Definitions are null-terminated | |
| 119 strings. */ | |
| 120 unsigned char *definedstrs; | |
| 121 }; | |
| 122 | |
| 123 /* Save this identifier into the state: put it in the hash table, | |
| 124 put the definition in 'definedstrs'. */ | |
| 125 | |
| 126 static int | |
| 127 save_idents (cpp_reader *pfile ATTRIBUTE_UNUSED, cpp_hashnode *hn, void *ss_p) | |
| 128 { | |
| 129 struct cpp_savedstate *const ss = (struct cpp_savedstate *)ss_p; | |
| 130 | |
| 131 if (hn->type != NT_VOID) | |
| 132 { | |
| 133 struct cpp_string news; | |
| 134 void **slot; | |
| 135 | |
| 136 news.len = NODE_LEN (hn); | |
| 137 news.text= NODE_NAME (hn); | |
| 138 slot = htab_find_slot (ss->definedhash, &news, INSERT); | |
| 139 if (*slot == NULL) | |
| 140 { | |
| 141 struct cpp_string *sp; | |
| 142 unsigned char *text; | |
| 143 | |
| 144 sp = XNEW (struct cpp_string); | |
| 145 *slot = sp; | |
| 146 | |
| 147 sp->len = NODE_LEN (hn); | |
| 148 sp->text = text = XNEWVEC (unsigned char, NODE_LEN (hn)); | |
| 149 memcpy (text, NODE_NAME (hn), NODE_LEN (hn)); | |
| 150 } | |
| 151 } | |
| 152 | |
| 153 return 1; | |
| 154 } | |
| 155 | |
| 156 /* Hash some memory in a generic way. */ | |
| 157 | |
| 158 static hashval_t | |
| 159 hashmem (const void *p_p, size_t sz) | |
| 160 { | |
| 161 const unsigned char *p = (const unsigned char *)p_p; | |
| 162 size_t i; | |
| 163 hashval_t h; | |
| 164 | |
| 165 h = 0; | |
| 166 for (i = 0; i < sz; i++) | |
| 167 h = h * 67 - (*p++ - 113); | |
| 168 return h; | |
| 169 } | |
| 170 | |
| 171 /* Hash a cpp string for the hashtable machinery. */ | |
| 172 | |
| 173 static hashval_t | |
| 174 cpp_string_hash (const void *a_p) | |
| 175 { | |
| 176 const struct cpp_string *a = (const struct cpp_string *) a_p; | |
| 177 return hashmem (a->text, a->len); | |
| 178 } | |
| 179 | |
| 180 /* Compare two cpp strings for the hashtable machinery. */ | |
| 181 | |
| 182 static int | |
| 183 cpp_string_eq (const void *a_p, const void *b_p) | |
| 184 { | |
| 185 const struct cpp_string *a = (const struct cpp_string *) a_p; | |
| 186 const struct cpp_string *b = (const struct cpp_string *) b_p; | |
| 187 return (a->len == b->len | |
| 188 && memcmp (a->text, b->text, a->len) == 0); | |
| 189 } | |
| 190 | |
| 191 /* Save the current definitions of the cpp_reader for dependency | |
| 192 checking purposes. When writing a precompiled header, this should | |
| 193 be called at the same point in the compilation as cpp_valid_state | |
| 194 would be called when reading the precompiled header back in. */ | |
| 195 | |
| 196 int | |
| 197 cpp_save_state (cpp_reader *r, FILE *f) | |
| 198 { | |
| 199 /* Save the list of non-void identifiers for the dependency checking. */ | |
| 200 r->savedstate = XNEW (struct cpp_savedstate); | |
| 201 r->savedstate->definedhash = htab_create (100, cpp_string_hash, | |
| 202 cpp_string_eq, NULL); | |
| 203 cpp_forall_identifiers (r, save_idents, r->savedstate); | |
| 204 | |
| 205 /* Write out the list of defined identifiers. */ | |
| 206 cpp_forall_identifiers (r, write_macdef, f); | |
| 207 | |
| 208 return 0; | |
| 209 } | |
| 210 | |
| 211 /* Calculate the 'hashsize' field of the saved state. */ | |
| 212 | |
| 213 static int | |
| 214 count_defs (cpp_reader *pfile ATTRIBUTE_UNUSED, cpp_hashnode *hn, void *ss_p) | |
| 215 { | |
| 216 struct cpp_savedstate *const ss = (struct cpp_savedstate *)ss_p; | |
| 217 | |
| 218 switch (hn->type) | |
| 219 { | |
| 220 case NT_MACRO: | |
| 221 if (hn->flags & NODE_BUILTIN) | |
| 222 return 1; | |
| 223 | |
| 224 /* else fall through. */ | |
| 225 | |
| 226 case NT_VOID: | |
| 227 { | |
| 228 struct cpp_string news; | |
| 229 void **slot; | |
| 230 | |
| 231 news.len = NODE_LEN (hn); | |
| 232 news.text = NODE_NAME (hn); | |
| 233 slot = (void **) htab_find (ss->definedhash, &news); | |
| 234 if (slot == NULL) | |
| 235 { | |
| 236 ss->hashsize += NODE_LEN (hn) + 1; | |
| 237 ss->n_defs += 1; | |
| 238 } | |
| 239 } | |
| 240 return 1; | |
| 241 | |
| 242 case NT_ASSERTION: | |
| 243 /* Not currently implemented. */ | |
| 244 return 1; | |
| 245 | |
| 246 default: | |
| 247 abort (); | |
| 248 } | |
| 249 } | |
| 250 | |
| 251 /* Collect the identifiers into the state's string table. */ | |
| 252 static int | |
| 253 write_defs (cpp_reader *pfile ATTRIBUTE_UNUSED, cpp_hashnode *hn, void *ss_p) | |
| 254 { | |
| 255 struct cpp_savedstate *const ss = (struct cpp_savedstate *)ss_p; | |
| 256 | |
| 257 switch (hn->type) | |
| 258 { | |
| 259 case NT_MACRO: | |
| 260 if (hn->flags & NODE_BUILTIN) | |
| 261 return 1; | |
| 262 | |
| 263 /* else fall through. */ | |
| 264 | |
| 265 case NT_VOID: | |
| 266 { | |
| 267 struct cpp_string news; | |
| 268 void **slot; | |
| 269 | |
| 270 news.len = NODE_LEN (hn); | |
| 271 news.text = NODE_NAME (hn); | |
| 272 slot = (void **) htab_find (ss->definedhash, &news); | |
| 273 if (slot == NULL) | |
| 274 { | |
| 275 ss->defs[ss->n_defs] = hn; | |
| 276 ss->n_defs += 1; | |
| 277 } | |
| 278 } | |
| 279 return 1; | |
| 280 | |
| 281 case NT_ASSERTION: | |
| 282 /* Not currently implemented. */ | |
| 283 return 1; | |
| 284 | |
| 285 default: | |
| 286 abort (); | |
| 287 } | |
| 288 } | |
| 289 | |
| 290 /* Comparison function for qsort. The arguments point to pointers of | |
| 291 type ht_hashnode *. */ | |
| 292 static int | |
| 293 comp_hashnodes (const void *px, const void *py) | |
| 294 { | |
| 295 cpp_hashnode *x = *(cpp_hashnode **) px; | |
| 296 cpp_hashnode *y = *(cpp_hashnode **) py; | |
| 297 return ustrcmp (NODE_NAME (x), NODE_NAME (y)); | |
| 298 } | |
| 299 | |
| 300 /* Write out the remainder of the dependency information. This should be | |
| 301 called after the PCH is ready to be saved. */ | |
| 302 | |
| 303 int | |
| 304 cpp_write_pch_deps (cpp_reader *r, FILE *f) | |
| 305 { | |
| 306 struct macrodef_struct z; | |
| 307 struct cpp_savedstate *const ss = r->savedstate; | |
| 308 unsigned char *definedstrs; | |
| 309 size_t i; | |
| 310 | |
| 311 /* Collect the list of identifiers which have been seen and | |
| 312 weren't defined to anything previously. */ | |
| 313 ss->hashsize = 0; | |
| 314 ss->n_defs = 0; | |
| 315 cpp_forall_identifiers (r, count_defs, ss); | |
| 316 | |
| 317 ss->defs = XNEWVEC (cpp_hashnode *, ss->n_defs); | |
| 318 ss->n_defs = 0; | |
| 319 cpp_forall_identifiers (r, write_defs, ss); | |
| 320 | |
| 321 /* Sort the list, copy it into a buffer, and write it out. */ | |
| 322 qsort (ss->defs, ss->n_defs, sizeof (cpp_hashnode *), &comp_hashnodes); | |
| 323 definedstrs = ss->definedstrs = XNEWVEC (unsigned char, ss->hashsize); | |
| 324 for (i = 0; i < ss->n_defs; ++i) | |
| 325 { | |
| 326 size_t len = NODE_LEN (ss->defs[i]); | |
| 327 memcpy (definedstrs, NODE_NAME (ss->defs[i]), len + 1); | |
| 328 definedstrs += len + 1; | |
| 329 } | |
| 330 | |
| 331 memset (&z, 0, sizeof (z)); | |
| 332 z.definition_length = ss->hashsize; | |
| 333 if (fwrite (&z, sizeof (z), 1, f) != 1 | |
| 334 || fwrite (ss->definedstrs, ss->hashsize, 1, f) != 1) | |
| 335 { | |
| 336 cpp_errno (r, CPP_DL_ERROR, "while writing precompiled header"); | |
| 337 return -1; | |
| 338 } | |
| 339 free (ss->definedstrs); | |
| 340 | |
| 341 /* Free the saved state. */ | |
| 342 free (ss); | |
| 343 r->savedstate = NULL; | |
| 344 | |
| 345 /* Save the next value of __COUNTER__. */ | |
| 346 if (fwrite (&r->counter, sizeof (r->counter), 1, f) != 1) | |
| 347 { | |
| 348 cpp_errno (r, CPP_DL_ERROR, "while writing precompiled header"); | |
| 349 return -1; | |
| 350 } | |
| 351 | |
| 352 return 0; | |
| 353 } | |
| 354 | |
| 355 /* Write out the definitions of the preprocessor, in a form suitable for | |
| 356 cpp_read_state. */ | |
| 357 | |
| 358 int | |
| 359 cpp_write_pch_state (cpp_reader *r, FILE *f) | |
| 360 { | |
| 361 if (!r->deps) | |
| 362 r->deps = deps_init (); | |
| 363 | |
| 364 if (deps_save (r->deps, f) != 0) | |
| 365 { | |
| 366 cpp_errno (r, CPP_DL_ERROR, "while writing precompiled header"); | |
| 367 return -1; | |
| 368 } | |
| 369 | |
| 370 if (! _cpp_save_file_entries (r, f)) | |
| 371 { | |
| 372 cpp_errno (r, CPP_DL_ERROR, "while writing precompiled header"); | |
| 373 return -1; | |
| 374 } | |
| 375 | |
| 376 /* Save the next __COUNTER__ value. When we include a precompiled header, | |
| 377 we need to start at the offset we would have if the header had been | |
| 378 included normally. */ | |
| 379 if (fwrite (&r->counter, sizeof (r->counter), 1, f) != 1) | |
| 380 { | |
| 381 cpp_errno (r, CPP_DL_ERROR, "while writing precompiled header"); | |
| 382 return -1; | |
| 383 } | |
| 384 | |
|
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parents:
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385 /* Write saved macros. */ |
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update it from 4.4.2 to 4.4.3.
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386 if (! _cpp_save_pushed_macros (r, f)) |
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387 { |
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388 cpp_errno (r, CPP_DL_ERROR, "while writing precompiled header"); |
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389 return -1; |
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390 } |
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391 |
| 0 | 392 return 0; |
| 393 } | |
| 394 | |
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395 static int |
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396 _cpp_restore_pushed_macros (cpp_reader *r, FILE *f) |
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397 { |
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398 size_t count_saved = 0; |
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399 size_t i; |
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400 struct def_pragma_macro *p; |
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401 size_t nlen; |
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402 uchar *defn; |
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403 size_t defnlen; |
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404 |
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405 if (fread (&count_saved, sizeof (count_saved), 1, f) != 1) |
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406 return 0; |
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407 if (! count_saved) |
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408 return 1; |
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409 for (i = 0; i < count_saved; i++) |
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410 { |
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411 if (fread (&nlen, sizeof (nlen), 1, f) != 1) |
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412 return 0; |
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413 p = XNEW (struct def_pragma_macro); |
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67
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update gcc from gcc-4.6-20100522 to gcc-4.6-20110318
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parents:
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414 memset (p, 0, sizeof (struct def_pragma_macro)); |
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changeset
|
415 p->name = XNEWVAR (char, nlen + 1); |
|
3bfb6c00c1e0
update it from 4.4.2 to 4.4.3.
kent <kent@cr.ie.u-ryukyu.ac.jp>
parents:
0
diff
changeset
|
416 p->name[nlen] = 0; |
|
3bfb6c00c1e0
update it from 4.4.2 to 4.4.3.
kent <kent@cr.ie.u-ryukyu.ac.jp>
parents:
0
diff
changeset
|
417 if (fread (p->name, nlen, 1, f) != 1) |
|
3bfb6c00c1e0
update it from 4.4.2 to 4.4.3.
kent <kent@cr.ie.u-ryukyu.ac.jp>
parents:
0
diff
changeset
|
418 return 0; |
|
3bfb6c00c1e0
update it from 4.4.2 to 4.4.3.
kent <kent@cr.ie.u-ryukyu.ac.jp>
parents:
0
diff
changeset
|
419 if (fread (&defnlen, sizeof (defnlen), 1, f) != 1) |
|
3bfb6c00c1e0
update it from 4.4.2 to 4.4.3.
kent <kent@cr.ie.u-ryukyu.ac.jp>
parents:
0
diff
changeset
|
420 return 0; |
|
67
f6334be47118
update gcc from gcc-4.6-20100522 to gcc-4.6-20110318
nobuyasu <dimolto@cr.ie.u-ryukyu.ac.jp>
parents:
63
diff
changeset
|
421 if (defnlen == 0) |
|
f6334be47118
update gcc from gcc-4.6-20100522 to gcc-4.6-20110318
nobuyasu <dimolto@cr.ie.u-ryukyu.ac.jp>
parents:
63
diff
changeset
|
422 p->is_undef = 1; |
|
f6334be47118
update gcc from gcc-4.6-20100522 to gcc-4.6-20110318
nobuyasu <dimolto@cr.ie.u-ryukyu.ac.jp>
parents:
63
diff
changeset
|
423 else |
|
f6334be47118
update gcc from gcc-4.6-20100522 to gcc-4.6-20110318
nobuyasu <dimolto@cr.ie.u-ryukyu.ac.jp>
parents:
63
diff
changeset
|
424 { |
|
f6334be47118
update gcc from gcc-4.6-20100522 to gcc-4.6-20110318
nobuyasu <dimolto@cr.ie.u-ryukyu.ac.jp>
parents:
63
diff
changeset
|
425 defn = XNEWVEC (uchar, defnlen + 1); |
|
f6334be47118
update gcc from gcc-4.6-20100522 to gcc-4.6-20110318
nobuyasu <dimolto@cr.ie.u-ryukyu.ac.jp>
parents:
63
diff
changeset
|
426 defn[defnlen] = 0; |
|
47
3bfb6c00c1e0
update it from 4.4.2 to 4.4.3.
kent <kent@cr.ie.u-ryukyu.ac.jp>
parents:
0
diff
changeset
|
427 |
|
67
f6334be47118
update gcc from gcc-4.6-20100522 to gcc-4.6-20110318
nobuyasu <dimolto@cr.ie.u-ryukyu.ac.jp>
parents:
63
diff
changeset
|
428 if (fread (defn, defnlen, 1, f) != 1) |
|
f6334be47118
update gcc from gcc-4.6-20100522 to gcc-4.6-20110318
nobuyasu <dimolto@cr.ie.u-ryukyu.ac.jp>
parents:
63
diff
changeset
|
429 return 0; |
|
47
3bfb6c00c1e0
update it from 4.4.2 to 4.4.3.
kent <kent@cr.ie.u-ryukyu.ac.jp>
parents:
0
diff
changeset
|
430 |
|
67
f6334be47118
update gcc from gcc-4.6-20100522 to gcc-4.6-20110318
nobuyasu <dimolto@cr.ie.u-ryukyu.ac.jp>
parents:
63
diff
changeset
|
431 p->definition = defn; |
|
f6334be47118
update gcc from gcc-4.6-20100522 to gcc-4.6-20110318
nobuyasu <dimolto@cr.ie.u-ryukyu.ac.jp>
parents:
63
diff
changeset
|
432 if (fread (&(p->line), sizeof (source_location), 1, f) != 1) |
|
f6334be47118
update gcc from gcc-4.6-20100522 to gcc-4.6-20110318
nobuyasu <dimolto@cr.ie.u-ryukyu.ac.jp>
parents:
63
diff
changeset
|
433 return 0; |
|
f6334be47118
update gcc from gcc-4.6-20100522 to gcc-4.6-20110318
nobuyasu <dimolto@cr.ie.u-ryukyu.ac.jp>
parents:
63
diff
changeset
|
434 defnlen = 0; |
|
f6334be47118
update gcc from gcc-4.6-20100522 to gcc-4.6-20110318
nobuyasu <dimolto@cr.ie.u-ryukyu.ac.jp>
parents:
63
diff
changeset
|
435 if (fread (&defnlen, sizeof (defnlen), 1, f) != 1) |
|
f6334be47118
update gcc from gcc-4.6-20100522 to gcc-4.6-20110318
nobuyasu <dimolto@cr.ie.u-ryukyu.ac.jp>
parents:
63
diff
changeset
|
436 return 0; |
|
f6334be47118
update gcc from gcc-4.6-20100522 to gcc-4.6-20110318
nobuyasu <dimolto@cr.ie.u-ryukyu.ac.jp>
parents:
63
diff
changeset
|
437 p->syshdr = ((defnlen & 1) != 0 ? 1 : 0); |
|
f6334be47118
update gcc from gcc-4.6-20100522 to gcc-4.6-20110318
nobuyasu <dimolto@cr.ie.u-ryukyu.ac.jp>
parents:
63
diff
changeset
|
438 p->used = ((defnlen & 2) != 0 ? 1 : 0); |
|
f6334be47118
update gcc from gcc-4.6-20100522 to gcc-4.6-20110318
nobuyasu <dimolto@cr.ie.u-ryukyu.ac.jp>
parents:
63
diff
changeset
|
439 } |
|
47
3bfb6c00c1e0
update it from 4.4.2 to 4.4.3.
kent <kent@cr.ie.u-ryukyu.ac.jp>
parents:
0
diff
changeset
|
440 |
|
3bfb6c00c1e0
update it from 4.4.2 to 4.4.3.
kent <kent@cr.ie.u-ryukyu.ac.jp>
parents:
0
diff
changeset
|
441 p->next = r->pushed_macros; |
|
3bfb6c00c1e0
update it from 4.4.2 to 4.4.3.
kent <kent@cr.ie.u-ryukyu.ac.jp>
parents:
0
diff
changeset
|
442 r->pushed_macros = p; |
|
3bfb6c00c1e0
update it from 4.4.2 to 4.4.3.
kent <kent@cr.ie.u-ryukyu.ac.jp>
parents:
0
diff
changeset
|
443 } |
|
3bfb6c00c1e0
update it from 4.4.2 to 4.4.3.
kent <kent@cr.ie.u-ryukyu.ac.jp>
parents:
0
diff
changeset
|
444 return 1; |
|
3bfb6c00c1e0
update it from 4.4.2 to 4.4.3.
kent <kent@cr.ie.u-ryukyu.ac.jp>
parents:
0
diff
changeset
|
445 } |
|
3bfb6c00c1e0
update it from 4.4.2 to 4.4.3.
kent <kent@cr.ie.u-ryukyu.ac.jp>
parents:
0
diff
changeset
|
446 |
|
3bfb6c00c1e0
update it from 4.4.2 to 4.4.3.
kent <kent@cr.ie.u-ryukyu.ac.jp>
parents:
0
diff
changeset
|
447 static int |
|
3bfb6c00c1e0
update it from 4.4.2 to 4.4.3.
kent <kent@cr.ie.u-ryukyu.ac.jp>
parents:
0
diff
changeset
|
448 _cpp_save_pushed_macros (cpp_reader *r, FILE *f) |
|
3bfb6c00c1e0
update it from 4.4.2 to 4.4.3.
kent <kent@cr.ie.u-ryukyu.ac.jp>
parents:
0
diff
changeset
|
449 { |
|
3bfb6c00c1e0
update it from 4.4.2 to 4.4.3.
kent <kent@cr.ie.u-ryukyu.ac.jp>
parents:
0
diff
changeset
|
450 size_t count_saved = 0; |
|
3bfb6c00c1e0
update it from 4.4.2 to 4.4.3.
kent <kent@cr.ie.u-ryukyu.ac.jp>
parents:
0
diff
changeset
|
451 size_t i; |
|
3bfb6c00c1e0
update it from 4.4.2 to 4.4.3.
kent <kent@cr.ie.u-ryukyu.ac.jp>
parents:
0
diff
changeset
|
452 struct def_pragma_macro *p,**pp; |
|
3bfb6c00c1e0
update it from 4.4.2 to 4.4.3.
kent <kent@cr.ie.u-ryukyu.ac.jp>
parents:
0
diff
changeset
|
453 size_t defnlen; |
|
3bfb6c00c1e0
update it from 4.4.2 to 4.4.3.
kent <kent@cr.ie.u-ryukyu.ac.jp>
parents:
0
diff
changeset
|
454 |
|
3bfb6c00c1e0
update it from 4.4.2 to 4.4.3.
kent <kent@cr.ie.u-ryukyu.ac.jp>
parents:
0
diff
changeset
|
455 /* Get count. */ |
|
3bfb6c00c1e0
update it from 4.4.2 to 4.4.3.
kent <kent@cr.ie.u-ryukyu.ac.jp>
parents:
0
diff
changeset
|
456 p = r->pushed_macros; |
|
3bfb6c00c1e0
update it from 4.4.2 to 4.4.3.
kent <kent@cr.ie.u-ryukyu.ac.jp>
parents:
0
diff
changeset
|
457 while (p != NULL) |
|
3bfb6c00c1e0
update it from 4.4.2 to 4.4.3.
kent <kent@cr.ie.u-ryukyu.ac.jp>
parents:
0
diff
changeset
|
458 { |
|
3bfb6c00c1e0
update it from 4.4.2 to 4.4.3.
kent <kent@cr.ie.u-ryukyu.ac.jp>
parents:
0
diff
changeset
|
459 count_saved++; |
|
3bfb6c00c1e0
update it from 4.4.2 to 4.4.3.
kent <kent@cr.ie.u-ryukyu.ac.jp>
parents:
0
diff
changeset
|
460 p = p->next; |
|
3bfb6c00c1e0
update it from 4.4.2 to 4.4.3.
kent <kent@cr.ie.u-ryukyu.ac.jp>
parents:
0
diff
changeset
|
461 } |
|
3bfb6c00c1e0
update it from 4.4.2 to 4.4.3.
kent <kent@cr.ie.u-ryukyu.ac.jp>
parents:
0
diff
changeset
|
462 if (fwrite (&count_saved, sizeof (count_saved), 1, f) != 1) |
|
3bfb6c00c1e0
update it from 4.4.2 to 4.4.3.
kent <kent@cr.ie.u-ryukyu.ac.jp>
parents:
0
diff
changeset
|
463 return 0; |
|
3bfb6c00c1e0
update it from 4.4.2 to 4.4.3.
kent <kent@cr.ie.u-ryukyu.ac.jp>
parents:
0
diff
changeset
|
464 if (!count_saved) |
|
3bfb6c00c1e0
update it from 4.4.2 to 4.4.3.
kent <kent@cr.ie.u-ryukyu.ac.jp>
parents:
0
diff
changeset
|
465 return 1; |
|
3bfb6c00c1e0
update it from 4.4.2 to 4.4.3.
kent <kent@cr.ie.u-ryukyu.ac.jp>
parents:
0
diff
changeset
|
466 |
|
3bfb6c00c1e0
update it from 4.4.2 to 4.4.3.
kent <kent@cr.ie.u-ryukyu.ac.jp>
parents:
0
diff
changeset
|
467 pp = (struct def_pragma_macro **) alloca (sizeof (struct def_pragma_macro *) |
|
3bfb6c00c1e0
update it from 4.4.2 to 4.4.3.
kent <kent@cr.ie.u-ryukyu.ac.jp>
parents:
0
diff
changeset
|
468 * count_saved); |
|
3bfb6c00c1e0
update it from 4.4.2 to 4.4.3.
kent <kent@cr.ie.u-ryukyu.ac.jp>
parents:
0
diff
changeset
|
469 /* Store them in reverse order. */ |
|
3bfb6c00c1e0
update it from 4.4.2 to 4.4.3.
kent <kent@cr.ie.u-ryukyu.ac.jp>
parents:
0
diff
changeset
|
470 p = r->pushed_macros; |
|
3bfb6c00c1e0
update it from 4.4.2 to 4.4.3.
kent <kent@cr.ie.u-ryukyu.ac.jp>
parents:
0
diff
changeset
|
471 i = count_saved; |
|
3bfb6c00c1e0
update it from 4.4.2 to 4.4.3.
kent <kent@cr.ie.u-ryukyu.ac.jp>
parents:
0
diff
changeset
|
472 while (p != NULL) |
|
3bfb6c00c1e0
update it from 4.4.2 to 4.4.3.
kent <kent@cr.ie.u-ryukyu.ac.jp>
parents:
0
diff
changeset
|
473 { |
|
3bfb6c00c1e0
update it from 4.4.2 to 4.4.3.
kent <kent@cr.ie.u-ryukyu.ac.jp>
parents:
0
diff
changeset
|
474 --i; |
|
3bfb6c00c1e0
update it from 4.4.2 to 4.4.3.
kent <kent@cr.ie.u-ryukyu.ac.jp>
parents:
0
diff
changeset
|
475 pp[i] = p; |
|
3bfb6c00c1e0
update it from 4.4.2 to 4.4.3.
kent <kent@cr.ie.u-ryukyu.ac.jp>
parents:
0
diff
changeset
|
476 p = p->next; |
|
3bfb6c00c1e0
update it from 4.4.2 to 4.4.3.
kent <kent@cr.ie.u-ryukyu.ac.jp>
parents:
0
diff
changeset
|
477 } |
|
3bfb6c00c1e0
update it from 4.4.2 to 4.4.3.
kent <kent@cr.ie.u-ryukyu.ac.jp>
parents:
0
diff
changeset
|
478 for (i = 0; i < count_saved; i++) |
|
3bfb6c00c1e0
update it from 4.4.2 to 4.4.3.
kent <kent@cr.ie.u-ryukyu.ac.jp>
parents:
0
diff
changeset
|
479 { |
|
3bfb6c00c1e0
update it from 4.4.2 to 4.4.3.
kent <kent@cr.ie.u-ryukyu.ac.jp>
parents:
0
diff
changeset
|
480 defnlen = strlen (pp[i]->name); |
|
3bfb6c00c1e0
update it from 4.4.2 to 4.4.3.
kent <kent@cr.ie.u-ryukyu.ac.jp>
parents:
0
diff
changeset
|
481 if (fwrite (&defnlen, sizeof (size_t), 1, f) != 1 |
|
3bfb6c00c1e0
update it from 4.4.2 to 4.4.3.
kent <kent@cr.ie.u-ryukyu.ac.jp>
parents:
0
diff
changeset
|
482 || fwrite (pp[i]->name, defnlen, 1, f) != 1) |
|
3bfb6c00c1e0
update it from 4.4.2 to 4.4.3.
kent <kent@cr.ie.u-ryukyu.ac.jp>
parents:
0
diff
changeset
|
483 return 0; |
|
67
f6334be47118
update gcc from gcc-4.6-20100522 to gcc-4.6-20110318
nobuyasu <dimolto@cr.ie.u-ryukyu.ac.jp>
parents:
63
diff
changeset
|
484 if (pp[i]->is_undef) |
|
f6334be47118
update gcc from gcc-4.6-20100522 to gcc-4.6-20110318
nobuyasu <dimolto@cr.ie.u-ryukyu.ac.jp>
parents:
63
diff
changeset
|
485 { |
|
f6334be47118
update gcc from gcc-4.6-20100522 to gcc-4.6-20110318
nobuyasu <dimolto@cr.ie.u-ryukyu.ac.jp>
parents:
63
diff
changeset
|
486 defnlen = 0; |
|
f6334be47118
update gcc from gcc-4.6-20100522 to gcc-4.6-20110318
nobuyasu <dimolto@cr.ie.u-ryukyu.ac.jp>
parents:
63
diff
changeset
|
487 if (fwrite (&defnlen, sizeof (size_t), 1, f) != 1) |
|
f6334be47118
update gcc from gcc-4.6-20100522 to gcc-4.6-20110318
nobuyasu <dimolto@cr.ie.u-ryukyu.ac.jp>
parents:
63
diff
changeset
|
488 return 0; |
|
f6334be47118
update gcc from gcc-4.6-20100522 to gcc-4.6-20110318
nobuyasu <dimolto@cr.ie.u-ryukyu.ac.jp>
parents:
63
diff
changeset
|
489 } |
|
f6334be47118
update gcc from gcc-4.6-20100522 to gcc-4.6-20110318
nobuyasu <dimolto@cr.ie.u-ryukyu.ac.jp>
parents:
63
diff
changeset
|
490 else |
|
f6334be47118
update gcc from gcc-4.6-20100522 to gcc-4.6-20110318
nobuyasu <dimolto@cr.ie.u-ryukyu.ac.jp>
parents:
63
diff
changeset
|
491 { |
|
f6334be47118
update gcc from gcc-4.6-20100522 to gcc-4.6-20110318
nobuyasu <dimolto@cr.ie.u-ryukyu.ac.jp>
parents:
63
diff
changeset
|
492 defnlen = ustrlen (pp[i]->definition); |
|
f6334be47118
update gcc from gcc-4.6-20100522 to gcc-4.6-20110318
nobuyasu <dimolto@cr.ie.u-ryukyu.ac.jp>
parents:
63
diff
changeset
|
493 if (fwrite (&defnlen, sizeof (size_t), 1, f) != 1 |
|
f6334be47118
update gcc from gcc-4.6-20100522 to gcc-4.6-20110318
nobuyasu <dimolto@cr.ie.u-ryukyu.ac.jp>
parents:
63
diff
changeset
|
494 || fwrite (pp[i]->definition, defnlen, 1, f) != 1) |
|
f6334be47118
update gcc from gcc-4.6-20100522 to gcc-4.6-20110318
nobuyasu <dimolto@cr.ie.u-ryukyu.ac.jp>
parents:
63
diff
changeset
|
495 return 0; |
|
f6334be47118
update gcc from gcc-4.6-20100522 to gcc-4.6-20110318
nobuyasu <dimolto@cr.ie.u-ryukyu.ac.jp>
parents:
63
diff
changeset
|
496 if (fwrite (&(pp[i]->line), sizeof (source_location), 1, f) != 1) |
|
f6334be47118
update gcc from gcc-4.6-20100522 to gcc-4.6-20110318
nobuyasu <dimolto@cr.ie.u-ryukyu.ac.jp>
parents:
63
diff
changeset
|
497 return 0; |
|
f6334be47118
update gcc from gcc-4.6-20100522 to gcc-4.6-20110318
nobuyasu <dimolto@cr.ie.u-ryukyu.ac.jp>
parents:
63
diff
changeset
|
498 defnlen = 0; |
|
f6334be47118
update gcc from gcc-4.6-20100522 to gcc-4.6-20110318
nobuyasu <dimolto@cr.ie.u-ryukyu.ac.jp>
parents:
63
diff
changeset
|
499 defnlen |= (pp[i]->syshdr != 0 ? 1 : 0); |
|
f6334be47118
update gcc from gcc-4.6-20100522 to gcc-4.6-20110318
nobuyasu <dimolto@cr.ie.u-ryukyu.ac.jp>
parents:
63
diff
changeset
|
500 defnlen |= (pp[i]->used != 0 ? 2 : 0); |
|
f6334be47118
update gcc from gcc-4.6-20100522 to gcc-4.6-20110318
nobuyasu <dimolto@cr.ie.u-ryukyu.ac.jp>
parents:
63
diff
changeset
|
501 if (fwrite (&defnlen, sizeof (defnlen), 1, f) != 1) |
|
f6334be47118
update gcc from gcc-4.6-20100522 to gcc-4.6-20110318
nobuyasu <dimolto@cr.ie.u-ryukyu.ac.jp>
parents:
63
diff
changeset
|
502 return 0; |
|
f6334be47118
update gcc from gcc-4.6-20100522 to gcc-4.6-20110318
nobuyasu <dimolto@cr.ie.u-ryukyu.ac.jp>
parents:
63
diff
changeset
|
503 } |
|
47
3bfb6c00c1e0
update it from 4.4.2 to 4.4.3.
kent <kent@cr.ie.u-ryukyu.ac.jp>
parents:
0
diff
changeset
|
504 } |
|
3bfb6c00c1e0
update it from 4.4.2 to 4.4.3.
kent <kent@cr.ie.u-ryukyu.ac.jp>
parents:
0
diff
changeset
|
505 return 1; |
|
3bfb6c00c1e0
update it from 4.4.2 to 4.4.3.
kent <kent@cr.ie.u-ryukyu.ac.jp>
parents:
0
diff
changeset
|
506 } |
|
3bfb6c00c1e0
update it from 4.4.2 to 4.4.3.
kent <kent@cr.ie.u-ryukyu.ac.jp>
parents:
0
diff
changeset
|
507 |
| 0 | 508 |
| 509 /* Data structure to transform hash table nodes into a sorted list */ | |
| 510 | |
| 511 struct ht_node_list | |
| 512 { | |
| 513 /* Array of nodes */ | |
| 514 cpp_hashnode **defs; | |
| 515 /* Number of nodes in the array */ | |
| 516 size_t n_defs; | |
| 517 /* Size of the allocated array */ | |
| 518 size_t asize; | |
| 519 }; | |
| 520 | |
| 521 /* Callback for collecting identifiers from hash table */ | |
| 522 | |
| 523 static int | |
| 524 collect_ht_nodes (cpp_reader *pfile ATTRIBUTE_UNUSED, cpp_hashnode *hn, | |
| 525 void *nl_p) | |
| 526 { | |
| 527 struct ht_node_list *const nl = (struct ht_node_list *)nl_p; | |
| 528 | |
| 529 if (hn->type != NT_VOID || hn->flags & NODE_POISONED) | |
| 530 { | |
| 531 if (nl->n_defs == nl->asize) | |
| 532 { | |
| 533 nl->asize *= 2; | |
| 534 nl->defs = XRESIZEVEC (cpp_hashnode *, nl->defs, nl->asize); | |
| 535 } | |
| 536 | |
| 537 nl->defs[nl->n_defs] = hn; | |
| 538 ++nl->n_defs; | |
| 539 } | |
| 540 return 1; | |
| 541 } | |
| 542 | |
| 543 | |
| 544 /* Return nonzero if FD is a precompiled header which is consistent | |
| 545 with the preprocessor's current definitions. It will be consistent | |
| 546 when: | |
| 547 | |
| 548 - anything that was defined just before the PCH was generated | |
| 549 is defined the same way now; and | |
| 550 - anything that was not defined then, but is defined now, was not | |
| 551 used by the PCH. | |
| 552 | |
| 553 NAME is used to print warnings if `warn_invalid_pch' is set in the | |
| 554 reader's flags. | |
| 555 */ | |
| 556 | |
| 557 int | |
| 558 cpp_valid_state (cpp_reader *r, const char *name, int fd) | |
| 559 { | |
| 560 struct macrodef_struct m; | |
| 561 size_t namebufsz = 256; | |
| 562 unsigned char *namebuf = XNEWVEC (unsigned char, namebufsz); | |
| 563 unsigned char *undeftab = NULL; | |
| 564 struct ht_node_list nl = { 0, 0, 0 }; | |
| 565 unsigned char *first, *last; | |
| 566 unsigned int i; | |
| 567 unsigned int counter; | |
| 568 | |
| 569 /* Read in the list of identifiers that must be defined | |
| 570 Check that they are defined in the same way. */ | |
| 571 for (;;) | |
| 572 { | |
| 573 cpp_hashnode *h; | |
| 574 const unsigned char *newdefn; | |
| 575 | |
| 576 if (read (fd, &m, sizeof (m)) != sizeof (m)) | |
| 577 goto error; | |
| 578 | |
| 579 if (m.name_length == 0) | |
| 580 break; | |
| 581 | |
| 582 /* If this file is already preprocessed, there won't be any | |
| 583 macros defined, and that's OK. */ | |
| 584 if (CPP_OPTION (r, preprocessed)) | |
| 585 { | |
| 586 if (lseek (fd, m.definition_length, SEEK_CUR) == -1) | |
| 587 goto error; | |
| 588 continue; | |
| 589 } | |
| 590 | |
| 591 if (m.definition_length > namebufsz) | |
| 592 { | |
| 593 free (namebuf); | |
| 594 namebufsz = m.definition_length + 256; | |
| 595 namebuf = XNEWVEC (unsigned char, namebufsz); | |
| 596 } | |
| 597 | |
| 598 if ((size_t)read (fd, namebuf, m.definition_length) | |
| 599 != m.definition_length) | |
| 600 goto error; | |
| 601 | |
| 602 h = cpp_lookup (r, namebuf, m.name_length); | |
| 603 if (m.flags & NODE_POISONED | |
| 604 || h->flags & NODE_POISONED) | |
| 605 { | |
| 606 if (CPP_OPTION (r, warn_invalid_pch)) | |
|
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607 cpp_warning_syshdr (r, CPP_W_INVALID_PCH, |
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608 "%s: not used because `%.*s' is poisoned", |
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609 name, m.name_length, namebuf); |
| 0 | 610 goto fail; |
| 611 } | |
| 612 | |
| 613 if (h->type != NT_MACRO) | |
| 614 { | |
| 615 /* It's ok if __GCC_HAVE_DWARF2_CFI_ASM becomes undefined, | |
| 616 as in, when the PCH file is created with -g and we're | |
| 617 attempting to use it without -g. Restoring the PCH file | |
| 618 is supposed to bring in this definition *and* enable the | |
| 619 generation of call frame information, so that precompiled | |
| 620 definitions that take this macro into accout, to decide | |
| 621 what asm to emit, won't issue .cfi directives when the | |
| 622 compiler doesn't. */ | |
| 623 if (!(h->flags & NODE_USED) | |
| 624 && m.name_length == sizeof ("__GCC_HAVE_DWARF2_CFI_ASM") - 1 | |
| 625 && !memcmp (namebuf, "__GCC_HAVE_DWARF2_CFI_ASM", m.name_length)) | |
| 626 continue; | |
| 627 | |
| 628 if (CPP_OPTION (r, warn_invalid_pch)) | |
|
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629 cpp_warning_syshdr (r, CPP_W_INVALID_PCH, |
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630 "%s: not used because `%.*s' not defined", |
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631 name, m.name_length, namebuf); |
| 0 | 632 goto fail; |
| 633 } | |
| 634 | |
| 635 newdefn = cpp_macro_definition (r, h); | |
| 636 | |
| 637 if (m.definition_length != ustrlen (newdefn) | |
| 638 || memcmp (namebuf, newdefn, m.definition_length) != 0) | |
| 639 { | |
| 640 if (CPP_OPTION (r, warn_invalid_pch)) | |
|
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641 cpp_warning_syshdr (r, CPP_W_INVALID_PCH, |
| 0 | 642 "%s: not used because `%.*s' defined as `%s' not `%.*s'", |
| 643 name, m.name_length, namebuf, newdefn + m.name_length, | |
| 644 m.definition_length - m.name_length, | |
| 645 namebuf + m.name_length); | |
| 646 goto fail; | |
| 647 } | |
| 648 } | |
| 649 free (namebuf); | |
| 650 namebuf = NULL; | |
| 651 | |
| 652 /* Read in the list of identifiers that must not be defined. | |
| 653 Check that they really aren't. */ | |
| 654 undeftab = XNEWVEC (unsigned char, m.definition_length); | |
| 655 if ((size_t) read (fd, undeftab, m.definition_length) != m.definition_length) | |
| 656 goto error; | |
| 657 | |
| 658 /* Collect identifiers from the current hash table. */ | |
| 659 nl.n_defs = 0; | |
| 660 nl.asize = 10; | |
| 661 nl.defs = XNEWVEC (cpp_hashnode *, nl.asize); | |
| 662 cpp_forall_identifiers (r, &collect_ht_nodes, &nl); | |
| 663 qsort (nl.defs, nl.n_defs, sizeof (cpp_hashnode *), &comp_hashnodes); | |
| 664 | |
| 665 /* Loop through nl.defs and undeftab, both of which are sorted lists. | |
| 666 There should be no matches. */ | |
| 667 first = undeftab; | |
| 668 last = undeftab + m.definition_length; | |
| 669 i = 0; | |
| 670 | |
| 671 while (first < last && i < nl.n_defs) | |
| 672 { | |
| 673 int cmp = ustrcmp (first, NODE_NAME (nl.defs[i])); | |
| 674 | |
| 675 if (cmp < 0) | |
| 676 first += ustrlen (first) + 1; | |
| 677 else if (cmp > 0) | |
| 678 ++i; | |
| 679 else | |
| 680 { | |
| 681 if (CPP_OPTION (r, warn_invalid_pch)) | |
|
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682 cpp_warning_syshdr (r, CPP_W_INVALID_PCH, |
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683 "%s: not used because `%s' is defined", |
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684 name, first); |
| 0 | 685 goto fail; |
| 686 } | |
| 687 } | |
| 688 | |
| 689 free(nl.defs); | |
| 690 nl.defs = NULL; | |
| 691 free (undeftab); | |
| 692 undeftab = NULL; | |
| 693 | |
| 694 /* Read in the next value of __COUNTER__. | |
| 695 Check that (a) __COUNTER__ was not used in the pch or (b) __COUNTER__ | |
| 696 has not been used in this translation unit. */ | |
| 697 if (read (fd, &counter, sizeof (counter)) != sizeof (counter)) | |
| 698 goto error; | |
| 699 if (counter && r->counter) | |
| 700 { | |
| 701 if (CPP_OPTION (r, warn_invalid_pch)) | |
|
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702 cpp_warning_syshdr (r, CPP_W_INVALID_PCH, |
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703 "%s: not used because `__COUNTER__' is invalid", |
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|
704 name); |
| 0 | 705 goto fail; |
| 706 } | |
| 707 | |
| 708 /* We win! */ | |
| 709 return 0; | |
| 710 | |
| 711 error: | |
| 712 cpp_errno (r, CPP_DL_ERROR, "while reading precompiled header"); | |
| 713 return -1; | |
| 714 | |
| 715 fail: | |
| 716 if (namebuf != NULL) | |
| 717 free (namebuf); | |
| 718 if (undeftab != NULL) | |
| 719 free (undeftab); | |
| 720 if (nl.defs != NULL) | |
| 721 free (nl.defs); | |
| 722 return 1; | |
| 723 } | |
| 724 | |
| 725 /* Save all the existing macros. */ | |
| 726 | |
| 727 struct save_macro_data | |
| 728 { | |
| 729 uchar **defns; | |
| 730 size_t count; | |
| 731 size_t array_size; | |
| 732 char **saved_pragmas; | |
| 733 }; | |
| 734 | |
| 735 /* Save the definition of a single macro, so that it will persist | |
| 736 across a PCH restore. Because macro data is in GCed memory, which | |
| 737 will be blown away by PCH, it must be temporarily copied to | |
| 738 malloced memory. (The macros will refer to identifier nodes which | |
| 739 are also GCed and so on, so the copying is done by turning them | |
| 740 into self-contained strings.) The assumption is that most macro | |
| 741 definitions will come from the PCH file, not from the compilation | |
| 742 before the PCH file is loaded, so it doesn't matter that this is | |
| 743 a little expensive. | |
| 744 | |
| 745 It would reduce the cost even further if macros defined in the PCH | |
| 746 file were not saved in this way, but this is not done (yet), except | |
| 747 for builtins, and for #assert by default. */ | |
| 748 | |
| 749 static int | |
| 750 save_macros (cpp_reader *r, cpp_hashnode *h, void *data_p) | |
| 751 { | |
| 752 struct save_macro_data *data = (struct save_macro_data *)data_p; | |
|
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|
753 |
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|
754 if ((h->flags & NODE_BUILTIN) |
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|
755 && h->type == NT_MACRO |
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|
756 && r->cb.user_builtin_macro) |
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757 r->cb.user_builtin_macro (r, h); |
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|
758 |
| 0 | 759 if (h->type != NT_VOID |
| 760 && (h->flags & NODE_BUILTIN) == 0) | |
| 761 { | |
| 762 if (data->count == data->array_size) | |
| 763 { | |
| 764 data->array_size *= 2; | |
| 765 data->defns = XRESIZEVEC (uchar *, data->defns, (data->array_size)); | |
| 766 } | |
| 767 | |
| 768 switch (h->type) | |
| 769 { | |
| 770 case NT_ASSERTION: | |
| 771 /* Not currently implemented. */ | |
| 772 return 1; | |
| 773 | |
| 774 case NT_MACRO: | |
| 775 { | |
| 776 const uchar * defn = cpp_macro_definition (r, h); | |
| 777 size_t defnlen = ustrlen (defn); | |
| 778 | |
| 779 data->defns[data->count] = (uchar *) xmemdup (defn, defnlen, | |
| 780 defnlen + 2); | |
| 781 data->defns[data->count][defnlen] = '\n'; | |
| 782 } | |
| 783 break; | |
| 784 | |
| 785 default: | |
| 786 abort (); | |
| 787 } | |
| 788 data->count++; | |
| 789 } | |
| 790 return 1; | |
| 791 } | |
| 792 | |
| 793 /* Prepare to restore the state, by saving the currently-defined | |
| 794 macros in 'data'. */ | |
| 795 | |
| 796 void | |
| 797 cpp_prepare_state (cpp_reader *r, struct save_macro_data **data) | |
| 798 { | |
| 799 struct save_macro_data *d = XNEW (struct save_macro_data); | |
| 800 | |
| 801 d->array_size = 512; | |
| 802 d->defns = XNEWVEC (uchar *, d->array_size); | |
| 803 d->count = 0; | |
| 804 cpp_forall_identifiers (r, save_macros, d); | |
| 805 d->saved_pragmas = _cpp_save_pragma_names (r); | |
| 806 *data = d; | |
| 807 } | |
| 808 | |
| 809 /* Given a precompiled header that was previously determined to be valid, | |
| 810 apply all its definitions (and undefinitions) to the current state. | |
| 811 DEPNAME is passed to deps_restore. */ | |
| 812 | |
| 813 int | |
| 814 cpp_read_state (cpp_reader *r, const char *name, FILE *f, | |
| 815 struct save_macro_data *data) | |
| 816 { | |
| 817 size_t i; | |
| 818 struct lexer_state old_state; | |
| 819 unsigned int counter; | |
| 820 | |
| 821 /* Restore spec_nodes, which will be full of references to the old | |
| 822 hashtable entries and so will now be invalid. */ | |
| 823 { | |
| 824 struct spec_nodes *s = &r->spec_nodes; | |
| 825 s->n_defined = cpp_lookup (r, DSC("defined")); | |
| 826 s->n_true = cpp_lookup (r, DSC("true")); | |
| 827 s->n_false = cpp_lookup (r, DSC("false")); | |
| 828 s->n__VA_ARGS__ = cpp_lookup (r, DSC("__VA_ARGS__")); | |
| 829 } | |
| 830 | |
| 831 old_state = r->state; | |
| 832 r->state.in_directive = 1; | |
| 833 r->state.prevent_expansion = 1; | |
| 834 r->state.angled_headers = 0; | |
| 835 | |
| 836 /* Run through the carefully-saved macros, insert them. */ | |
| 837 for (i = 0; i < data->count; i++) | |
| 838 { | |
| 839 cpp_hashnode *h; | |
| 840 size_t namelen; | |
| 841 uchar *defn; | |
| 842 | |
| 843 namelen = ustrcspn (data->defns[i], "( \n"); | |
| 844 h = cpp_lookup (r, data->defns[i], namelen); | |
| 845 defn = data->defns[i] + namelen; | |
| 846 | |
| 847 /* The PCH file is valid, so we know that if there is a definition | |
| 848 from the PCH file it must be the same as the one we had | |
| 849 originally, and so do not need to restore it. */ | |
| 850 if (h->type == NT_VOID) | |
| 851 { | |
| 852 if (cpp_push_buffer (r, defn, ustrchr (defn, '\n') - defn, true) | |
| 853 != NULL) | |
| 854 { | |
| 855 _cpp_clean_line (r); | |
| 856 if (!_cpp_create_definition (r, h)) | |
| 857 abort (); | |
| 858 _cpp_pop_buffer (r); | |
| 859 } | |
| 860 else | |
| 861 abort (); | |
| 862 } | |
| 863 | |
| 864 free (data->defns[i]); | |
| 865 } | |
| 866 r->state = old_state; | |
| 867 | |
| 868 _cpp_restore_pragma_names (r, data->saved_pragmas); | |
| 869 | |
| 870 free (data); | |
| 871 | |
| 872 if (deps_restore (r->deps, f, CPP_OPTION (r, restore_pch_deps) ? name : NULL) | |
| 873 != 0) | |
| 874 goto error; | |
| 875 | |
| 876 if (! _cpp_read_file_entries (r, f)) | |
| 877 goto error; | |
| 878 | |
| 879 if (fread (&counter, sizeof (counter), 1, f) != 1) | |
| 880 goto error; | |
| 881 | |
| 882 if (!r->counter) | |
| 883 r->counter = counter; | |
| 884 | |
|
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3bfb6c00c1e0
update it from 4.4.2 to 4.4.3.
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parents:
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diff
changeset
|
885 /* Read pushed macros. */ |
|
3bfb6c00c1e0
update it from 4.4.2 to 4.4.3.
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parents:
0
diff
changeset
|
886 if (! _cpp_restore_pushed_macros (r, f)) |
|
3bfb6c00c1e0
update it from 4.4.2 to 4.4.3.
kent <kent@cr.ie.u-ryukyu.ac.jp>
parents:
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diff
changeset
|
887 goto error; |
| 0 | 888 return 0; |
| 889 | |
| 890 error: | |
| 891 cpp_errno (r, CPP_DL_ERROR, "while reading precompiled header"); | |
| 892 return -1; | |
| 893 } |