1 /*
2 * 'sparse' library helper routines.
3 *
4 * Copyright (C) 2003 Transmeta Corp.
5 * 2003-2004 Linus Torvalds
6 *
7 * Permission is hereby granted, free of charge, to any person obtaining a copy
8 * of this software and associated documentation files (the "Software"), to deal
9 * in the Software without restriction, including without limitation the rights
10 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
11 * copies of the Software, and to permit persons to whom the Software is
12 * furnished to do so, subject to the following conditions:
13 *
14 * The above copyright notice and this permission notice shall be included in
15 * all copies or substantial portions of the Software.
16 *
17 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
18 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
19 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
20 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
21 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
22 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
23 * THE SOFTWARE.
24 */
25 #include <ctype.h>
26 #include <errno.h>
27 #include <fcntl.h>
28 #include <stdarg.h>
29 #include <stddef.h>
30 #include <stdio.h>
31 #include <stdlib.h>
32 #include <string.h>
33 #include <unistd.h>
34 #include <assert.h>
35
36 #include <sys/types.h>
37
38 #include "lib.h"
39 #include "allocate.h"
40 #include "token.h"
41 #include "parse.h"
42 #include "symbol.h"
43 #include "expression.h"
44 #include "evaluate.h"
45 #include "scope.h"
46 #include "linearize.h"
47 #include "target.h"
48 #include "machine.h"
49 #include "version.h"
50 #include "bits.h"
51
52 int verbose, optimize_level, optimize_size, preprocessing;
53 int die_if_error = 0;
54 int parse_error;
55 int has_error = 0;
56 int do_output = 0;
57
58 #ifndef __GNUC__
59 # define __GNUC__ 2
60 # define __GNUC_MINOR__ 95
61 # define __GNUC_PATCHLEVEL__ 0
62 #endif
63
64 int gcc_major = __GNUC__;
65 int gcc_minor = __GNUC_MINOR__;
66 int gcc_patchlevel = __GNUC_PATCHLEVEL__;
67
68 const char *base_filename;
69
70 static const char *diag_prefix = "";
71 static const char *gcc_base_dir = GCC_BASE;
72 static const char *multiarch_dir = MULTIARCH_TRIPLET;
73 static const char *outfile = NULL;
74
75 struct token *skip_to(struct token *token, int op)
76 {
77 while (!match_op(token, op) && !eof_token(token))
78 token = token->next;
79 return token;
80 }
81
82 static struct token bad_token = { .pos.type = TOKEN_BAD };
83 struct token *expect(struct token *token, int op, const char *where)
84 {
85 if (!match_op(token, op)) {
86 if (token != &bad_token) {
87 bad_token.next = token;
88 sparse_error(token->pos, "Expected %s %s", show_special(op), where);
89 sparse_error(token->pos, "got %s", show_token(token));
90 }
91 if (op == ';')
92 return skip_to(token, op);
93 return &bad_token;
94 }
95 return token->next;
96 }
97
98 ///
99 // issue an error message on new parsing errors
100 // @token: the current token
101 // @errmsg: the error message
102 // If the current token is from a previous error, an error message
103 // has already been issued, so nothing more is done.
104 // Otherwise, @errmsg is displayed followed by the current token.
105 void unexpected(struct token *token, const char *errmsg)
106 {
107 if (token == &bad_token)
108 return;
109 sparse_error(token->pos, "%s", errmsg);
110 sparse_error(token->pos, "got %s", show_token(token));
111 }
112
113 unsigned int hexval(unsigned int c)
114 {
115 int retval = 256;
116 switch (c) {
117 case '0'...'9':
118 retval = c - '0';
119 break;
120 case 'a'...'f':
121 retval = c - 'a' + 10;
122 break;
123 case 'A'...'F':
124 retval = c - 'A' + 10;
125 break;
126 }
127 return retval;
128 }
129
130 static void do_warn(const char *type, struct position pos, const char * fmt, va_list args)
131 {
132 static char buffer[512];
133 const char *name;
134
135 /* Shut up warnings if position is bad_token.pos */
136 if (pos.type == TOKEN_BAD)
137 return;
138
139 vsprintf(buffer, fmt, args);
140 name = stream_name(pos.stream);
141
142 fflush(stdout);
143 fprintf(stderr, "%s: %s:%d:%d: %s%s\n",
144 diag_prefix, name, pos.line, pos.pos, type, buffer);
145 }
146
147 unsigned int fmax_warnings = 100;
148 static int show_info = 1;
149
150 void info(struct position pos, const char * fmt, ...)
151 {
152 va_list args;
153
154 if (!show_info)
155 return;
156 va_start(args, fmt);
157 do_warn("", pos, fmt, args);
158 va_end(args);
159 }
160
161 static void do_error(struct position pos, const char * fmt, va_list args)
162 {
163 static int errors = 0;
164
165 parse_error = 1;
166 die_if_error = 1;
167 show_info = 1;
168 /* Shut up warnings if position is bad_token.pos */
169 if (pos.type == TOKEN_BAD)
170 return;
171 /* Shut up warnings after an error */
172 has_error |= ERROR_CURR_PHASE;
173 if (errors > 100) {
174 static int once = 0;
175 show_info = 0;
176 if (once)
177 return;
178 fmt = "too many errors";
179 once = 1;
180 }
181
182 do_warn("error: ", pos, fmt, args);
183 errors++;
184 }
185
186 void warning(struct position pos, const char * fmt, ...)
187 {
188 va_list args;
189
190 if (Wsparse_error) {
191 va_start(args, fmt);
192 do_error(pos, fmt, args);
193 va_end(args);
194 return;
195 }
196
197 if (!fmax_warnings || has_error) {
198 show_info = 0;
199 return;
200 }
201
202 if (!--fmax_warnings) {
203 show_info = 0;
204 fmt = "too many warnings";
205 }
206
207 va_start(args, fmt);
208 do_warn("warning: ", pos, fmt, args);
209 va_end(args);
210 }
211
212 void sparse_error(struct position pos, const char * fmt, ...)
213 {
214 va_list args;
215 va_start(args, fmt);
216 do_error(pos, fmt, args);
217 va_end(args);
218 }
219
220 void expression_error(struct expression *expr, const char *fmt, ...)
221 {
222 va_list args;
223 va_start(args, fmt);
224 do_error(expr->pos, fmt, args);
225 va_end(args);
226 expr->ctype = &bad_ctype;
227 }
228
229 NORETURN_ATTR
230 void error_die(struct position pos, const char * fmt, ...)
231 {
232 va_list args;
233 va_start(args, fmt);
234 do_warn("error: ", pos, fmt, args);
235 va_end(args);
236 exit(1);
237 }
238
239 NORETURN_ATTR
240 void die(const char *fmt, ...)
241 {
242 va_list args;
243 static char buffer[512];
244
245 va_start(args, fmt);
246 vsnprintf(buffer, sizeof(buffer), fmt, args);
247 va_end(args);
248
249 fprintf(stderr, "%s: %s\n", diag_prefix, buffer);
250 exit(1);
251 }
252
253 static struct token *pre_buffer_begin = NULL;
254 static struct token *pre_buffer_end = NULL;
255
256 int Waddress = 0;
257 int Waddress_space = 1;
258 int Wbitwise = 1;
259 int Wbitwise_pointer = 0;
260 int Wcast_from_as = 0;
261 int Wcast_to_as = 0;
262 int Wcast_truncate = 1;
263 int Wconstant_suffix = 0;
264 int Wconstexpr_not_const = 0;
265 int Wcontext = 1;
266 int Wdecl = 1;
267 int Wdeclarationafterstatement = -1;
268 int Wdefault_bitfield_sign = 0;
269 int Wdesignated_init = 1;
270 int Wdo_while = 0;
271 int Wimplicit_int = 1;
272 int Winit_cstring = 0;
273 int Wint_to_pointer_cast = 1;
274 int Wenum_mismatch = 1;
275 int Wexternal_function_has_definition = 1;
276 int Wsparse_error = 0;
277 int Wmemcpy_max_count = 1;
278 int Wnon_pointer_null = 1;
279 int Wold_initializer = 1;
280 int Wold_style_definition = 1;
281 int Wone_bit_signed_bitfield = 1;
282 int Woverride_init = 1;
283 int Woverride_init_all = 0;
284 int Woverride_init_whole_range = 0;
285 int Wparen_string = 0;
286 int Wpointer_arith = 0;
287 int Wpointer_to_int_cast = 1;
288 int Wptr_subtraction_blows = 0;
289 int Wreturn_void = 0;
290 int Wshadow = 0;
291 int Wshift_count_negative = 1;
292 int Wshift_count_overflow = 1;
293 int Wsizeof_bool = 0;
294 int Wstrict_prototypes = 1;
295 int Wtautological_compare = 0;
296 int Wtransparent_union = 0;
297 int Wtypesign = 0;
298 int Wundef = 0;
299 int Wuninitialized = 1;
300 int Wunknown_attribute = 0;
301 int Wvla = 1;
302
303 int dump_macro_defs = 0;
304 int dump_macros_only = 0;
305
306 int dbg_compound = 0;
307 int dbg_dead = 0;
308 int dbg_domtree = 0;
309 int dbg_entry = 0;
310 int dbg_ir = 0;
311 int dbg_postorder = 0;
312
313 unsigned long fdump_ir;
314 int fmem_report = 0;
315 unsigned long long fmemcpy_max_count = 100000;
316 unsigned long fpasses = ~0UL;
317 int funsigned_char = UNSIGNED_CHAR;
318
319 int preprocess_only;
320
321 static enum { STANDARD_C89,
322 STANDARD_C94,
323 STANDARD_C99,
324 STANDARD_C11,
325 STANDARD_GNU11,
326 STANDARD_GNU89,
327 STANDARD_GNU99, } standard = STANDARD_GNU89;
328
329 int arch_m64 = ARCH_M64_DEFAULT;
330 int arch_msize_long = 0;
331 int arch_big_endian = ARCH_BIG_ENDIAN;
332 int arch_mach = MACH_NATIVE;
333
334
335 #define CMDLINE_INCLUDE 20
336 static int cmdline_include_nr = 0;
337 static char *cmdline_include[CMDLINE_INCLUDE];
338
339
340 void add_pre_buffer(const char *fmt, ...)
341 {
342 va_list args;
343 unsigned int size;
344 struct token *begin, *end;
345 char buffer[4096];
346
347 va_start(args, fmt);
348 size = vsnprintf(buffer, sizeof(buffer), fmt, args);
349 va_end(args);
350 begin = tokenize_buffer(buffer, size, &end);
351 if (!pre_buffer_begin)
352 pre_buffer_begin = begin;
353 if (pre_buffer_end)
354 pre_buffer_end->next = begin;
355 pre_buffer_end = end;
356 }
357
358 static char **handle_switch_D(char *arg, char **next)
359 {
360 const char *name = arg + 1;
361 const char *value = "1";
362
363 if (!*name) {
364 arg = *++next;
365 if (!arg)
366 die("argument to `-D' is missing");
367 name = arg;
368 }
369
370 for (;;arg++) {
371 char c;
372 c = *arg;
373 if (!c)
374 break;
375 if (c == '=') {
376 *arg = '\0';
377 value = arg + 1;
378 break;
379 }
380 }
381 add_pre_buffer("#define %s %s\n", name, value);
382 return next;
383 }
384
385 static char **handle_switch_E(char *arg, char **next)
386 {
387 if (arg[1] == '\0')
388 preprocess_only = 1;
389 return next;
390 }
391
392 static char **handle_switch_I(char *arg, char **next)
393 {
394 char *path = arg+1;
395
396 switch (arg[1]) {
397 case '-':
398 add_pre_buffer("#split_include\n");
399 break;
400
401 case '\0': /* Plain "-I" */
402 path = *++next;
403 if (!path)
404 die("missing argument for -I option");
405 /* Fall through */
406 default:
407 add_pre_buffer("#add_include \"%s/\"\n", path);
408 }
409 return next;
410 }
411
412 static void add_cmdline_include(char *filename)
413 {
414 if (cmdline_include_nr >= CMDLINE_INCLUDE)
415 die("too many include files for %s\n", filename);
416 cmdline_include[cmdline_include_nr++] = filename;
417 }
418
419 static char **handle_switch_i(char *arg, char **next)
420 {
421 if (*next && !strcmp(arg, "include"))
422 add_cmdline_include(*++next);
423 else if (*next && !strcmp(arg, "imacros"))
424 add_cmdline_include(*++next);
425 else if (*next && !strcmp(arg, "isystem")) {
426 char *path = *++next;
427 if (!path)
428 die("missing argument for -isystem option");
429 add_pre_buffer("#add_isystem \"%s/\"\n", path);
430 } else if (*next && !strcmp(arg, "idirafter")) {
431 char *path = *++next;
432 if (!path)
433 die("missing argument for -idirafter option");
434 add_pre_buffer("#add_dirafter \"%s/\"\n", path);
435 }
436 return next;
437 }
438
439 static char **handle_switch_M(char *arg, char **next)
440 {
441 if (!strcmp(arg, "MF") || !strcmp(arg,"MQ") || !strcmp(arg,"MT")) {
442 if (!*next)
443 die("missing argument for -%s option", arg);
444 return next + 1;
445 }
446 return next;
447 }
448
449 static char **handle_multiarch_dir(char *arg, char **next)
450 {
451 multiarch_dir = *++next;
452 if (!multiarch_dir)
453 die("missing argument for -multiarch-dir option");
454 return next;
455 }
456
457 static char **handle_switch_m(char *arg, char **next)
458 {
459 if (!strcmp(arg, "m64")) {
460 arch_m64 = ARCH_LP64;
461 } else if (!strcmp(arg, "m32") || !strcmp(arg, "m16")) {
462 arch_m64 = ARCH_LP32;
463 } else if (!strcmp(arg, "mx32")) {
464 arch_m64 = ARCH_X32;
465 } else if (!strcmp(arg, "msize-llp64")) {
466 arch_m64 = ARCH_LLP64;
467 } else if (!strcmp(arg, "msize-long")) {
468 arch_msize_long = 1;
469 } else if (!strcmp(arg, "multiarch-dir")) {
470 return handle_multiarch_dir(arg, next);
471 } else if (!strcmp(arg, "mbig-endian")) {
472 arch_big_endian = 1;
473 } else if (!strcmp(arg, "mlittle-endian")) {
474 arch_big_endian = 0;
475 }
476 return next;
477 }
478
479 static void handle_arch_msize_long_finalize(void)
480 {
481 if (arch_msize_long) {
482 size_t_ctype = &ulong_ctype;
483 ssize_t_ctype = &long_ctype;
484 }
485 }
486
487 static void handle_arch_finalize(void)
488 {
489 handle_arch_msize_long_finalize();
490 }
491
492 static const char *match_option(const char *arg, const char *prefix)
493 {
494 unsigned int n = strlen(prefix);
495 if (strncmp(arg, prefix, n) == 0)
496 return arg + n;
497 return NULL;
498 }
499
500
501 struct mask_map {
502 const char *name;
503 unsigned long mask;
504 };
505
506 static int apply_mask(unsigned long *val, const char *str, unsigned len, const struct mask_map *map, int neg)
507 {
508 const char *name;
509
510 for (;(name = map->name); map++) {
511 if (!strncmp(name, str, len) && !name[len]) {
512 if (neg == 0)
513 *val |= map->mask;
514 else
515 *val &= ~map->mask;
516 return 0;
517 }
518 }
519 return 1;
520 }
521
522 static int handle_suboption_mask(const char *arg, const char *opt, const struct mask_map *map, unsigned long *flag)
523 {
524 if (*opt == '\0') {
525 apply_mask(flag, "", 0, map, 0);
526 return 1;
527 }
528 if (*opt++ != '=')
529 return 0;
530 while (1) {
531 unsigned int len = strcspn(opt, ",+");
532 int neg = 0;
533 if (len == 0)
534 goto end;
535 if (!strncmp(opt, "no-", 3)) {
536 opt += 3;
537 len -= 3;
538 neg = 1;
539 }
540 if (apply_mask(flag, opt, len, map, neg))
541 die("error: wrong option '%.*s' for \'%s\'", len, opt, arg);
542
543 end:
544 opt += len;
545 if (*opt++ == '\0')
546 break;
547 }
548 return 1;
549 }
550
551
552 #define OPT_INVERSE 1
553 struct flag {
554 const char *name;
555 int *flag;
556 int (*fun)(const char *arg, const char *opt, const struct flag *, int options);
557 unsigned long mask;
558 };
559
560 static int handle_switches(const char *ori, const char *opt, const struct flag *flags)
561 {
562 const char *arg = opt;
563 int val = 1;
564
565 // Prefixe "no-" mean to turn flag off.
566 if (strncmp(arg, "no-", 3) == 0) {
567 arg += 3;
568 val = 0;
569 }
570
571 for (; flags->name; flags++) {
572 const char *opt = match_option(arg, flags->name);
573 int rc;
574
575 if (!opt)
576 continue;
577
578 if (flags->fun) {
579 int options = 0;
580 if (!val)
581 options |= OPT_INVERSE;
582 if ((rc = flags->fun(ori, opt, flags, options)))
583 return rc;
584 }
585
586 // boolean flag
587 if (opt[0] == '\0' && flags->flag) {
588 if (flags->mask & OPT_INVERSE)
589 val = !val;
590 *flags->flag = val;
591 return 1;
592 }
593 }
594
595 // not handled
596 return 0;
597 }
598
599
600 #define OPTNUM_ZERO_IS_INF 1
601 #define OPTNUM_UNLIMITED 2
602
603 #define OPT_NUMERIC(NAME, TYPE, FUNCTION) \
604 static int opt_##NAME(const char *arg, const char *opt, TYPE *ptr, int flag) \
605 { \
606 char *end; \
607 TYPE val; \
608 \
609 val = FUNCTION(opt, &end, 0); \
610 if (*end != '\0' || end == opt) { \
611 if ((flag & OPTNUM_UNLIMITED) && !strcmp(opt, "unlimited")) \
612 val = ~val; \
613 else \
614 die("error: wrong argument to \'%s\'", arg); \
615 } \
616 if ((flag & OPTNUM_ZERO_IS_INF) && val == 0) \
617 val = ~val; \
618 *ptr = val; \
619 return 1; \
620 }
621
622 OPT_NUMERIC(ullong, unsigned long long, strtoull)
623 OPT_NUMERIC(uint, unsigned int, strtoul)
624
625
626 static char **handle_switch_o(char *arg, char **next)
627 {
628 if (!strcmp (arg, "o")) { // "-o foo"
629 if (!*++next)
630 die("argument to '-o' is missing");
631 outfile = *next;
632 }
633 // else "-ofoo"
634
635 return next;
636 }
637
638 static const struct flag warnings[] = {
639 { "address", &Waddress },
640 { "address-space", &Waddress_space },
641 { "bitwise", &Wbitwise },
642 { "bitwise-pointer", &Wbitwise_pointer},
643 { "cast-from-as", &Wcast_from_as },
644 { "cast-to-as", &Wcast_to_as },
645 { "cast-truncate", &Wcast_truncate },
646 { "constant-suffix", &Wconstant_suffix },
647 { "constexpr-not-const", &Wconstexpr_not_const},
648 { "context", &Wcontext },
649 { "decl", &Wdecl },
650 { "declaration-after-statement", &Wdeclarationafterstatement },
651 { "default-bitfield-sign", &Wdefault_bitfield_sign },
652 { "designated-init", &Wdesignated_init },
653 { "do-while", &Wdo_while },
654 { "enum-mismatch", &Wenum_mismatch },
655 { "external-function-has-definition", &Wexternal_function_has_definition },
656 { "implicit-int", &Wimplicit_int },
657 { "init-cstring", &Winit_cstring },
658 { "int-to-pointer-cast", &Wint_to_pointer_cast },
659 { "memcpy-max-count", &Wmemcpy_max_count },
660 { "non-pointer-null", &Wnon_pointer_null },
661 { "old-initializer", &Wold_initializer },
662 { "old-style-definition", &Wold_style_definition },
663 { "one-bit-signed-bitfield", &Wone_bit_signed_bitfield },
664 { "override-init", &Woverride_init },
665 { "override-init-all", &Woverride_init_all },
666 { "paren-string", &Wparen_string },
667 { "pointer-to-int-cast", &Wpointer_to_int_cast },
668 { "ptr-subtraction-blows", &Wptr_subtraction_blows },
669 { "return-void", &Wreturn_void },
670 { "shadow", &Wshadow },
671 { "shift-count-negative", &Wshift_count_negative },
672 { "shift-count-overflow", &Wshift_count_overflow },
673 { "sizeof-bool", &Wsizeof_bool },
674 { "strict-prototypes", &Wstrict_prototypes },
675 { "pointer-arith", &Wpointer_arith },
676 { "sparse-error", &Wsparse_error },
677 { "tautological-compare", &Wtautological_compare },
678 { "transparent-union", &Wtransparent_union },
679 { "typesign", &Wtypesign },
680 { "undef", &Wundef },
681 { "uninitialized", &Wuninitialized },
682 { "unknown-attribute", &Wunknown_attribute },
683 { "vla", &Wvla },
684 };
685
686 enum {
687 WARNING_OFF,
688 WARNING_ON,
689 WARNING_FORCE_OFF
690 };
691
692
693 static char **handle_onoff_switch(char *arg, char **next, const struct flag warnings[], int n)
694 {
695 int flag = WARNING_ON;
696 char *p = arg + 1;
697 unsigned i;
698
699 if (!strcmp(p, "sparse-all")) {
700 for (i = 0; i < n; i++) {
701 if (*warnings[i].flag != WARNING_FORCE_OFF && warnings[i].flag != &Wsparse_error)
702 *warnings[i].flag = WARNING_ON;
703 }
704 return NULL;
705 }
706
707 // Prefixes "no" and "no-" mean to turn warning off.
708 if (p[0] == 'n' && p[1] == 'o') {
709 p += 2;
710 if (p[0] == '-')
711 p++;
712 flag = WARNING_FORCE_OFF;
713 }
714
715 for (i = 0; i < n; i++) {
716 if (!strcmp(p,warnings[i].name)) {
717 *warnings[i].flag = flag;
718 return next;
719 }
720 }
721
722 // Unknown.
723 return NULL;
724 }
725
726 static char **handle_switch_W(char *arg, char **next)
727 {
728 char ** ret = handle_onoff_switch(arg, next, warnings, ARRAY_SIZE(warnings));
729 if (ret)
730 return ret;
731
732 // Unknown.
733 return next;
734 }
735
736 static struct flag debugs[] = {
737 { "compound", &dbg_compound},
738 { "dead", &dbg_dead},
739 { "domtree", &dbg_domtree},
740 { "entry", &dbg_entry},
741 { "ir", &dbg_ir},
742 { "postorder", &dbg_postorder},
743 };
744
745
746 static char **handle_switch_v(char *arg, char **next)
747 {
748 char ** ret = handle_onoff_switch(arg, next, debugs, ARRAY_SIZE(debugs));
749 if (ret)
750 return ret;
751
752 // Unknown.
753 do {
754 verbose++;
755 } while (*++arg == 'v');
756 return next;
757 }
758
759 static char **handle_switch_d(char *arg, char **next)
760 {
761 char *arg_char = arg + 1;
762
763 /*
764 * -d<CHARS>, where <CHARS> is a sequence of characters, not preceded
765 * by a space. If you specify characters whose behaviour conflicts,
766 * the result is undefined.
767 */
768 while (*arg_char) {
769 switch (*arg_char) {
770 case 'M': /* dump just the macro definitions */
771 dump_macros_only = 1;
772 dump_macro_defs = 0;
773 break;
774 case 'D': /* like 'M', but also output pre-processed text */
775 dump_macro_defs = 1;
776 dump_macros_only = 0;
777 break;
778 case 'N': /* like 'D', but only output macro names not bodies */
779 break;
780 case 'I': /* like 'D', but also output #include directives */
781 break;
782 case 'U': /* like 'D', but only output expanded macros */
783 break;
784 }
785 arg_char++;
786 }
787 return next;
788 }
789
790
791 static void handle_onoff_switch_finalize(const struct flag warnings[], int n)
792 {
793 unsigned i;
794
795 for (i = 0; i < n; i++) {
796 if (*warnings[i].flag == WARNING_FORCE_OFF)
797 *warnings[i].flag = WARNING_OFF;
798 }
799 }
800
801 static void handle_switch_W_finalize(void)
802 {
803 handle_onoff_switch_finalize(warnings, ARRAY_SIZE(warnings));
804
805 /* default Wdeclarationafterstatement based on the C dialect */
806 if (-1 == Wdeclarationafterstatement)
807 {
808 switch (standard)
809 {
810 case STANDARD_C89:
811 case STANDARD_C94:
812 Wdeclarationafterstatement = 1;
813 break;
814
815 case STANDARD_C99:
816 case STANDARD_GNU89:
817 case STANDARD_GNU99:
818 case STANDARD_C11:
819 case STANDARD_GNU11:
820 Wdeclarationafterstatement = 0;
821 break;
822
823 default:
824 assert (0);
825 }
826
827 }
828 }
829
830 static void handle_switch_v_finalize(void)
831 {
832 handle_onoff_switch_finalize(debugs, ARRAY_SIZE(debugs));
833 }
834
835 static char **handle_switch_U(char *arg, char **next)
836 {
837 const char *name = arg + 1;
838 if (*name == '\0')
839 name = *++next;
840 add_pre_buffer ("#undef %s\n", name);
841 return next;
842 }
843
844 static char **handle_switch_O(char *arg, char **next)
845 {
846 int level = 1;
847 if (arg[1] >= '0' && arg[1] <= '9')
848 level = arg[1] - '0';
849 optimize_level = level;
850 optimize_size = arg[1] == 's';
851 return next;
852 }
853
854 static int handle_ftabstop(const char *arg, const char *opt, const struct flag *flag, int options)
855 {
856 unsigned long val;
857 char *end;
858
859 if (*opt == '\0')
860 die("error: missing argument to \"%s\"", arg);
861
862 /* we silently ignore silly values */
863 val = strtoul(opt, &end, 10);
864 if (*end == '\0' && 1 <= val && val <= 100)
865 tabstop = val;
866
867 return 1;
868 }
869
870 static int handle_fpasses(const char *arg, const char *opt, const struct flag *flag, int options)
871 {
872 unsigned long mask;
873
874 mask = flag->mask;
875 if (*opt == '\0') {
876 if (options & OPT_INVERSE)
877 fpasses &= ~mask;
878 else
879 fpasses |= mask;
880 return 1;
881 }
882 if (options & OPT_INVERSE)
883 return 0;
884 if (!strcmp(opt, "-enable")) {
885 fpasses |= mask;
886 return 1;
887 }
888 if (!strcmp(opt, "-disable")) {
889 fpasses &= ~mask;
890 return 1;
891 }
892 if (!strcmp(opt, "=last")) {
893 // clear everything above
894 mask |= mask - 1;
895 fpasses &= mask;
896 return 1;
897 }
898 return 0;
899 }
900
901 static int handle_fdiagnostic_prefix(const char *arg, const char *opt, const struct flag *flag, int options)
902 {
903 switch (*opt) {
904 case '\0':
905 diag_prefix = "sparse";
906 return 1;
907 case '=':
908 diag_prefix = xasprintf("%s", opt+1);
909 return 1;
910 default:
911 return 0;
912 }
913 }
914
915 static int handle_fdump_ir(const char *arg, const char *opt, const struct flag *flag, int options)
916 {
917 static const struct mask_map dump_ir_options[] = {
918 { "", PASS_LINEARIZE },
919 { "linearize", PASS_LINEARIZE },
920 { "mem2reg", PASS_MEM2REG },
921 { "final", PASS_FINAL },
922 { },
923 };
924
925 return handle_suboption_mask(arg, opt, dump_ir_options, &fdump_ir);
926 }
927
928 static int handle_fmemcpy_max_count(const char *arg, const char *opt, const struct flag *flag, int options)
929 {
930 opt_ullong(arg, opt, &fmemcpy_max_count, OPTNUM_ZERO_IS_INF|OPTNUM_UNLIMITED);
931 return 1;
932 }
933
934 static int handle_fmax_warnings(const char *arg, const char *opt, const struct flag *flag, int options)
935 {
936 opt_uint(arg, opt, &fmax_warnings, OPTNUM_UNLIMITED);
937 return 1;
938 }
939
940 static struct flag fflags[] = {
941 { "diagnostic-prefix", NULL, handle_fdiagnostic_prefix },
942 { "dump-ir", NULL, handle_fdump_ir },
943 { "linearize", NULL, handle_fpasses, PASS_LINEARIZE },
944 { "max-warnings=", NULL, handle_fmax_warnings },
945 { "mem-report", &fmem_report },
946 { "memcpy-max-count=", NULL, handle_fmemcpy_max_count },
947 { "tabstop=", NULL, handle_ftabstop },
948 { "mem2reg", NULL, handle_fpasses, PASS_MEM2REG },
949 { "optim", NULL, handle_fpasses, PASS_OPTIM },
950 { "signed-char", &funsigned_char, NULL, OPT_INVERSE },
951 { "unsigned-char", &funsigned_char, NULL, },
952 { },
953 };
954
955 static char **handle_switch_f(char *arg, char **next)
956 {
957 if (handle_switches(arg-1, arg+1, fflags))
958 return next;
959
960 return next;
961 }
962
963 static char **handle_switch_G(char *arg, char **next)
964 {
965 if (!strcmp (arg, "G") && *next)
966 return next + 1; // "-G 0"
967 else
968 return next; // "-G0" or (bogus) terminal "-G"
969 }
970
971 static char **handle_switch_a(char *arg, char **next)
972 {
973 if (!strcmp (arg, "ansi"))
974 standard = STANDARD_C89;
975
976 return next;
977 }
978
979 static char **handle_switch_s(const char *arg, char **next)
980 {
981 if ((arg = match_option(arg, "std="))) {
982 if (!strcmp (arg, "c89") ||
983 !strcmp (arg, "iso9899:1990"))
984 standard = STANDARD_C89;
985
986 else if (!strcmp (arg, "iso9899:199409"))
987 standard = STANDARD_C94;
988
989 else if (!strcmp (arg, "c99") ||
990 !strcmp (arg, "c9x") ||
991 !strcmp (arg, "iso9899:1999") ||
992 !strcmp (arg, "iso9899:199x"))
993 standard = STANDARD_C99;
994
995 else if (!strcmp (arg, "gnu89"))
996 standard = STANDARD_GNU89;
997
998 else if (!strcmp (arg, "gnu99") || !strcmp (arg, "gnu9x"))
999 standard = STANDARD_GNU99;
1000
1001 else if (!strcmp(arg, "c11") ||
1002 !strcmp(arg, "c1x") ||
1003 !strcmp(arg, "iso9899:2011"))
1004 standard = STANDARD_C11;
1005
1006 else if (!strcmp(arg, "gnu11"))
1007 standard = STANDARD_GNU11;
1008
1009 else
1010 die ("Unsupported C dialect");
1011 }
1012
1013 return next;
1014 }
1015
1016 static char **handle_nostdinc(char *arg, char **next)
1017 {
1018 add_pre_buffer("#nostdinc\n");
1019 return next;
1020 }
1021
1022 static char **handle_switch_n(char *arg, char **next)
1023 {
1024 if (!strcmp (arg, "nostdinc"))
1025 return handle_nostdinc(arg, next);
1026
1027 return next;
1028 }
1029
1030 static char **handle_base_dir(char *arg, char **next)
1031 {
1032 gcc_base_dir = *++next;
1033 if (!gcc_base_dir)
1034 die("missing argument for -gcc-base-dir option");
1035 return next;
1036 }
1037
1038 static char **handle_no_lineno(char *arg, char **next)
1039 {
1040 no_lineno = 1;
1041 return next;
1042 }
1043
1044 static char **handle_switch_g(char *arg, char **next)
1045 {
1046 if (!strcmp (arg, "gcc-base-dir"))
1047 return handle_base_dir(arg, next);
1048
1049 return next;
1050 }
1051
1052 static char **handle_switch_x(char *arg, char **next)
1053 {
1054 if (!*++next)
1055 die("missing argument for -x option");
1056 return next;
1057 }
1058
1059 static char **handle_version(char *arg, char **next)
1060 {
1061 printf("%s\n", SPARSE_VERSION);
1062 exit(0);
1063 }
1064
1065 static char **handle_param(char *arg, char **next)
1066 {
1067 char *value = NULL;
1068
1069 /* Ignore smatch's --param-mapper */
1070 if (strcmp(arg, "-mapper") == 0)
1071 return next;
1072
1073 /* For now just skip any '--param=*' or '--param *' */
1074 if (*arg == '\0') {
1075 value = *++next;
1076 } else if (isspace((unsigned char)*arg) || *arg == '=') {
1077 value = ++arg;
1078 }
1079
1080 if (!value)
1081 die("missing argument for --param option");
1082
1083 return next;
1084 }
1085
1086 struct switches {
1087 const char *name;
1088 char **(*fn)(char *, char **);
1089 unsigned int prefix:1;
1090 };
1091
1092 static char **handle_long_options(char *arg, char **next)
1093 {
1094 static struct switches cmd[] = {
1095 { "param", handle_param, 1 },
1096 { "version", handle_version },
1097 { "nostdinc", handle_nostdinc },
1098 { "gcc-base-dir", handle_base_dir},
1099 { "no-lineno", handle_no_lineno},
1100 { NULL, NULL }
1101 };
1102 struct switches *s = cmd;
1103
1104 while (s->name) {
1105 int optlen = strlen(s->name);
1106 if (!strncmp(s->name, arg, optlen + !s->prefix))
1107 return s->fn(arg + optlen, next);
1108 s++;
1109 }
1110 return next;
1111 }
1112
1113 static char **handle_switch(char *arg, char **next)
1114 {
1115 switch (*arg) {
1116 case 'a': return handle_switch_a(arg, next);
1117 case 'D': return handle_switch_D(arg, next);
1118 case 'd': return handle_switch_d(arg, next);
1119 case 'E': return handle_switch_E(arg, next);
1120 case 'f': return handle_switch_f(arg, next);
1121 case 'g': return handle_switch_g(arg, next);
1122 case 'G': return handle_switch_G(arg, next);
1123 case 'I': return handle_switch_I(arg, next);
1124 case 'i': return handle_switch_i(arg, next);
1125 case 'M': return handle_switch_M(arg, next);
1126 case 'm': return handle_switch_m(arg, next);
1127 case 'n': return handle_switch_n(arg, next);
1128 case 'o': return handle_switch_o(arg, next);
1129 case 'O': return handle_switch_O(arg, next);
1130 case 's': return handle_switch_s(arg, next);
1131 case 'U': return handle_switch_U(arg, next);
1132 case 'v': return handle_switch_v(arg, next);
1133 case 'W': return handle_switch_W(arg, next);
1134 case 'x': return handle_switch_x(arg, next);
1135 case '-': return handle_long_options(arg + 1, next);
1136 default:
1137 break;
1138 }
1139
1140 /*
1141 * Ignore unknown command line options:
1142 * they're probably gcc switches
1143 */
1144 return next;
1145 }
1146
1147 #define PTYPE_SIZEOF (1U << 0)
1148 #define PTYPE_T (1U << 1)
1149 #define PTYPE_MAX (1U << 2)
1150 #define PTYPE_MIN (1U << 3)
1151 #define PTYPE_WIDTH (1U << 4)
1152 #define PTYPE_TYPE (1U << 5)
1153 #define PTYPE_ALL (PTYPE_MAX|PTYPE_SIZEOF|PTYPE_WIDTH)
1154 #define PTYPE_ALL_T (PTYPE_MAX|PTYPE_SIZEOF|PTYPE_WIDTH|PTYPE_T)
1155
1156 static void predefined_sizeof(const char *name, const char *suffix, unsigned bits)
1157 {
1158 char buf[32];
1159
1160 snprintf(buf, sizeof(buf), "__SIZEOF_%s%s__", name, suffix);
1161 predefine(buf, 1, "%d", bits/8);
1162 }
1163
1164 static void predefined_width(const char *name, unsigned bits)
1165 {
1166 char buf[32];
1167
1168 snprintf(buf, sizeof(buf), "__%s_WIDTH__", name);
1169 predefine(buf, 1, "%d", bits);
1170 }
1171
1172 static void predefined_max(const char *name, struct symbol *type)
1173 {
1174 const char *suffix = builtin_type_suffix(type);
1175 unsigned bits = type->bit_size - is_signed_type(type);
1176 unsigned long long max = bits_mask(bits);
1177 char buf[32];
1178
1179 snprintf(buf, sizeof(buf), "__%s_MAX__", name);
1180 predefine(buf, 1, "%#llx%s", max, suffix);
1181 }
1182
1183 static void predefined_min(const char *name, struct symbol *type)
1184 {
1185 const char *suffix = builtin_type_suffix(type);
1186 char buf[32];
1187
1188 snprintf(buf, sizeof(buf), "__%s_MIN__", name);
1189
1190 if (is_signed_type(type))
1191 predefine(buf, 1, "(-__%s_MAX__ - 1)", name);
1192 else
1193 predefine(buf, 1, "0%s", suffix);
1194 }
1195
1196 static void predefined_type(const char *name, struct symbol *type)
1197 {
1198 const char *typename = builtin_typename(type);
1199 add_pre_buffer("#weak_define __%s_TYPE__ %s\n", name, typename);
1200 }
1201
1202 static void predefined_ctype(const char *name, struct symbol *type, int flags)
1203 {
1204 unsigned bits = type->bit_size;
1205
1206 if (flags & PTYPE_SIZEOF) {
1207 const char *suffix = (flags & PTYPE_T) ? "_T" : "";
1208 predefined_sizeof(name, suffix, bits);
1209 }
1210 if (flags & PTYPE_MAX)
1211 predefined_max(name, type);
1212 if (flags & PTYPE_MIN)
1213 predefined_min(name, type);
1214 if (flags & PTYPE_TYPE)
1215 predefined_type(name, type);
1216 if (flags & PTYPE_WIDTH)
1217 predefined_width(name, bits);
1218 }
1219
1220 static void predefined_macros(void)
1221 {
1222 predefine("__CHECKER__", 0, "1");
1223 predefine("__GNUC__", 1, "%d", gcc_major);
1224 predefine("__GNUC_MINOR__", 1, "%d", gcc_minor);
1225 predefine("__GNUC_PATCHLEVEL__", 1, "%d", gcc_patchlevel);
1226
1227 predefine("__STDC__", 1, "1");
1228 switch (standard) {
1229 case STANDARD_C89:
1230 predefine("__STRICT_ANSI__", 1, "1");
1231 break;
1232
1233 case STANDARD_C94:
1234 predefine("__STDC_VERSION__", 1, "199409L");
1235 predefine("__STRICT_ANSI__", 1, "1");
1236 break;
1237
1238 case STANDARD_C99:
1239 predefine("__STDC_VERSION__", 1, "199901L");
1240 predefine("__STRICT_ANSI__", 1, "1");
1241 break;
1242
1243 case STANDARD_GNU89:
1244 default:
1245 break;
1246
1247 case STANDARD_GNU99:
1248 predefine("__STDC_VERSION__", 1, "199901L");
1249 break;
1250
1251 case STANDARD_C11:
1252 predefine("__STRICT_ANSI__", 1, "1");
1253 case STANDARD_GNU11:
1254 predefine("__STDC_NO_ATOMICS__", 1, "1");
1255 predefine("__STDC_NO_COMPLEX__", 1, "1");
1256 predefine("__STDC_NO_THREADS__", 1, "1");
1257 predefine("__STDC_VERSION__", 1, "201112L");
1258 break;
1259 }
1260
1261 predefine("__CHAR_BIT__", 1, "%d", bits_in_char);
1262 if (funsigned_char)
1263 predefine("__CHAR_UNSIGNED__", 1, "1");
1264
1265 predefined_ctype("SHORT", &short_ctype, PTYPE_SIZEOF);
1266 predefined_ctype("SHRT", &short_ctype, PTYPE_MAX|PTYPE_WIDTH);
1267 predefined_ctype("SCHAR", &schar_ctype, PTYPE_MAX|PTYPE_WIDTH);
1268 predefined_ctype("WCHAR", wchar_ctype, PTYPE_ALL_T|PTYPE_MIN|PTYPE_TYPE);
1269 predefined_ctype("WINT", wint_ctype, PTYPE_ALL_T|PTYPE_MIN|PTYPE_TYPE);
1270 predefined_ctype("CHAR16", &ushort_ctype, PTYPE_TYPE);
1271 predefined_ctype("CHAR32", &uint_ctype, PTYPE_TYPE);
1272
1273 predefined_ctype("INT", &int_ctype, PTYPE_ALL);
1274 predefined_ctype("LONG", &long_ctype, PTYPE_ALL);
1275 predefined_ctype("LONG_LONG", &llong_ctype, PTYPE_ALL);
1276
1277 predefined_ctype("INT8", &schar_ctype, PTYPE_MAX|PTYPE_TYPE);
1278 predefined_ctype("UINT8", &uchar_ctype, PTYPE_MAX|PTYPE_TYPE);
1279 predefined_ctype("INT16", &short_ctype, PTYPE_MAX|PTYPE_TYPE);
1280 predefined_ctype("UINT16", &ushort_ctype, PTYPE_MAX|PTYPE_TYPE);
1281 predefined_ctype("INT32", int32_ctype, PTYPE_MAX|PTYPE_TYPE);
1282 predefined_ctype("UINT32", uint32_ctype, PTYPE_MAX|PTYPE_TYPE);
1283 predefined_ctype("INT64", int64_ctype, PTYPE_MAX|PTYPE_TYPE);
1284 predefined_ctype("UINT64", uint64_ctype, PTYPE_MAX|PTYPE_TYPE);
1285
1286 predefined_sizeof("INT128", "", 128);
1287
1288 predefined_ctype("INTMAX", intmax_ctype, PTYPE_MAX|PTYPE_TYPE|PTYPE_WIDTH);
1289 predefined_ctype("UINTMAX", uintmax_ctype, PTYPE_MAX|PTYPE_TYPE);
1290 predefined_ctype("INTPTR", ssize_t_ctype, PTYPE_MAX|PTYPE_TYPE|PTYPE_WIDTH);
1291 predefined_ctype("UINTPTR", size_t_ctype, PTYPE_MAX|PTYPE_TYPE);
1292 predefined_ctype("PTRDIFF", ssize_t_ctype, PTYPE_ALL_T|PTYPE_TYPE);
1293 predefined_ctype("SIZE", size_t_ctype, PTYPE_ALL_T|PTYPE_TYPE);
1294 predefined_ctype("POINTER", &ptr_ctype, PTYPE_SIZEOF);
1295
1296 predefined_sizeof("FLOAT", "", bits_in_float);
1297 predefined_sizeof("DOUBLE", "", bits_in_double);
1298 predefined_sizeof("LONG_DOUBLE", "", bits_in_longdouble);
1299
1300 predefine("__ORDER_LITTLE_ENDIAN__", 1, "1234");
1301 predefine("__ORDER_BIG_ENDIAN__", 1, "4321");
1302 predefine("__ORDER_PDP_ENDIAN__", 1, "3412");
1303 if (arch_big_endian) {
1304 predefine("__BIG_ENDIAN__", 1, "1");
1305 predefine("__BYTE_ORDER__", 1, "__ORDER_BIG_ENDIAN__");
1306 } else {
1307 predefine("__LITTLE_ENDIAN__", 1, "1");
1308 predefine("__BYTE_ORDER__", 1, "__ORDER_LITTLE_ENDIAN__");
1309 }
1310
1311 if (optimize_level)
1312 predefine("__OPTIMIZE__", 0, "1");
1313 if (optimize_size)
1314 predefine("__OPTIMIZE_SIZE__", 0, "1");
1315
1316 // Temporary hacks
1317 predefine("__extension__", 0, NULL);
1318 predefine("__pragma__", 0, NULL);
1319
1320 switch (arch_m64) {
1321 case ARCH_LP32:
1322 break;
1323 case ARCH_X32:
1324 predefine("__ILP32__", 1, "1");
1325 predefine("_ILP32", 1, "1");
1326 break;
1327 case ARCH_LP64:
1328 predefine("__LP64__", 1, "1");
1329 predefine("__LP64", 1, "1");
1330 predefine("_LP64", 1, "1");
1331 break;
1332 case ARCH_LLP64:
1333 predefine("__LLP64__", 1, "1");
1334 break;
1335 }
1336
1337 switch (arch_mach) {
1338 case MACH_ARM64:
1339 predefine("__aarch64__", 1, "1");
1340 break;
1341 case MACH_ARM:
1342 predefine("__arm__", 1, "1");
1343 break;
1344 case MACH_M68K:
1345 predefine("__m68k__", 1, "1");
1346 break;
1347 case MACH_MIPS64:
1348 if (arch_m64 == ARCH_LP64)
1349 predefine("__mips64", 1, "64");
1350 /* fall-through */
1351 case MACH_MIPS32:
1352 predefine("__mips", 1, "%d", ptr_ctype.bit_size);
1353 predefine("_MIPS_SZINT", 1, "%d", int_ctype.bit_size);
1354 predefine("_MIPS_SZLONG", 1, "%d", long_ctype.bit_size);
1355 predefine("_MIPS_SZPTR", 1, "%d", ptr_ctype.bit_size);
1356 break;
1357 case MACH_PPC64:
1358 if (arch_m64 == ARCH_LP64) {
1359 predefine("__powerpc64__", 1, "1");
1360 predefine("__ppc64__", 1, "1");
1361 predefine("__PPC64__", 1, "1");
1362 }
1363 /* fall-through */
1364 case MACH_PPC32:
1365 predefine("__powerpc__", 1, "1");
1366 predefine("__powerpc", 1, "1");
1367 predefine("__ppc__", 1, "1");
1368 predefine("__PPC__", 1, "1");
1369 break;
1370 case MACH_RISCV64:
1371 case MACH_RISCV32:
1372 predefine("__riscv", 1, "1");
1373 predefine("__riscv_xlen", 1, "%d", ptr_ctype.bit_size);
1374 break;
1375 case MACH_S390X:
1376 predefine("__zarch__", 1, "1");
1377 predefine("__s390x__", 1, "1");
1378 predefine("__s390__", 1, "1");
1379 break;
1380 case MACH_SPARC64:
1381 if (arch_m64 == ARCH_LP64) {
1382 predefine("__sparc_v9__", 1, "1");
1383 predefine("__sparcv9__", 1, "1");
1384 predefine("__sparcv9", 1, "1");
1385 predefine("__sparc64__", 1, "1");
1386 predefine("__arch64__", 1, "1");
1387 }
1388 /* fall-through */
1389 case MACH_SPARC32:
1390 predefine("__sparc__", 1, "1");
1391 predefine("__sparc", 1, "1");
1392 break;
1393 case MACH_X86_64:
1394 if (arch_m64 != ARCH_LP32) {
1395 predefine("__x86_64__", 1, "1");
1396 predefine("__x86_64", 1, "1");
1397 break;
1398 }
1399 /* fall-through */
1400 case MACH_I386:
1401 predefine("__i386__", 1, "1");
1402 predefine("__i386", 1, "1");
1403 predefine("i386", 1, "1");
1404 break;
1405 }
1406
1407 predefine("__PRAGMA_REDEFINE_EXTNAME", 1, "1");
1408
1409 #ifdef __sun
1410 predefine("__unix__", 1, "1");
1411 predefine("__unix", 1, "1");
1412 predefine("unix", 1, "1");
1413 predefine("__sun__", 1, "1");
1414 predefine("__sun", 1, "1");
1415 predefine("sun", 1, "1");
1416 predefine("__svr4__", 1, "1");
1417 #endif
1418 }
1419
1420 static void create_builtin_stream(void)
1421 {
1422 // Temporary hack
1423 add_pre_buffer("#define _Pragma(x)\n");
1424
1425 /* add the multiarch include directories, if any */
1426 if (multiarch_dir && *multiarch_dir) {
1427 add_pre_buffer("#add_system \"/usr/include/%s\"\n", multiarch_dir);
1428 add_pre_buffer("#add_system \"/usr/local/include/%s\"\n", multiarch_dir);
1429 }
1430
1431 /* We add compiler headers path here because we have to parse
1432 * the arguments to get it, falling back to default. */
1433 add_pre_buffer("#add_system \"%s/include\"\n", gcc_base_dir);
1434 add_pre_buffer("#add_system \"%s/include-fixed\"\n", gcc_base_dir);
1435
1436 add_pre_buffer("#define __has_builtin(x) 0\n");
1437 add_pre_buffer("#define __has_attribute(x) 0\n");
1438 add_pre_buffer("#define __builtin_stdarg_start(a,b) ((a) = (__builtin_va_list)(&(b)))\n");
1439 add_pre_buffer("#define __builtin_va_start(a,b) ((a) = (__builtin_va_list)(&(b)))\n");
1440 add_pre_buffer("#define __builtin_ms_va_start(a,b) ((a) = (__builtin_ms_va_list)(&(b)))\n");
1441 add_pre_buffer("#define __builtin_va_arg(arg,type) ({ type __va_arg_ret = *(type *)(arg); arg += sizeof(type); __va_arg_ret; })\n");
1442 add_pre_buffer("#define __builtin_va_alist (*(void *)0)\n");
1443 add_pre_buffer("#define __builtin_va_arg_incr(x) ((x) + 1)\n");
1444 add_pre_buffer("#define __builtin_va_copy(dest, src) ({ dest = src; (void)0; })\n");
1445 add_pre_buffer("#define __builtin_ms_va_copy(dest, src) ({ dest = src; (void)0; })\n");
1446 add_pre_buffer("#define __builtin_va_end(arg)\n");
1447 add_pre_buffer("#define __builtin_ms_va_end(arg)\n");
1448 add_pre_buffer("#define __builtin_va_arg_pack()\n");
1449 }
1450
1451 static struct symbol_list *sparse_tokenstream(struct token *token)
1452 {
1453 int builtin = token && !token->pos.stream;
1454
1455 // Preprocess the stream
1456 token = preprocess(token);
1457
1458 if (dump_macro_defs || dump_macros_only) {
1459 if (!builtin)
1460 dump_macro_definitions();
1461 if (dump_macros_only)
1462 return NULL;
1463 }
1464
1465 if (preprocess_only) {
1466 while (!eof_token(token)) {
1467 int prec = 1;
1468 struct token *next = token->next;
1469 const char *separator = "";
1470 if (next->pos.whitespace)
1471 separator = " ";
1472 if (next->pos.newline) {
1473 separator = "\n\t\t\t\t\t";
1474 prec = next->pos.pos;
1475 if (prec > 4)
1476 prec = 4;
1477 }
1478 printf("%s%.*s", show_token(token), prec, separator);
1479 token = next;
1480 }
1481 putchar('\n');
1482
1483 return NULL;
1484 }
1485
1486 // Parse the resulting C code
1487 while (!eof_token(token))
1488 token = external_declaration(token, &translation_unit_used_list, NULL);
1489 return translation_unit_used_list;
1490 }
1491
1492 static struct symbol_list *sparse_file(const char *filename)
1493 {
1494 int fd;
1495 struct token *token;
1496
1497 if (strcmp (filename, "-") == 0) {
1498 fd = 0;
1499 } else {
1500 fd = open(filename, O_RDONLY);
1501 if (fd < 0)
1502 die("No such file: %s", filename);
1503 }
1504 base_filename = filename;
1505
1506 // Tokenize the input stream
1507 token = tokenize(filename, fd, NULL, includepath);
1508 store_all_tokens(token);
1509 close(fd);
1510
1511 return sparse_tokenstream(token);
1512 }
1513
1514 /*
1515 * This handles the "-include" directive etc: we're in global
1516 * scope, and all types/macros etc will affect all the following
1517 * files.
1518 *
1519 * NOTE NOTE NOTE! "#undef" of anything in this stage will
1520 * affect all subsequent files too, i.e. we can have non-local
1521 * behaviour between files!
1522 */
1523 static struct symbol_list *sparse_initial(void)
1524 {
1525 int i;
1526
1527 // Prepend any "include" file to the stream.
1528 // We're in global scope, it will affect all files!
1529 for (i = 0; i < cmdline_include_nr; i++)
1530 add_pre_buffer("#argv_include \"%s\"\n", cmdline_include[i]);
1531
1532 return sparse_tokenstream(pre_buffer_begin);
1533 }
1534
1535 static int endswith(const char *str, const char *suffix)
1536 {
1537 const char *found = strstr(str, suffix);
1538 return (found && strcmp(found, suffix) == 0);
1539 }
1540
1541 struct symbol_list *sparse_initialize(int argc, char **argv, struct string_list **filelist)
1542 {
1543 char **args;
1544 struct symbol_list *list;
1545
1546 // Initialize symbol stream first, so that we can add defines etc
1547 init_symbols();
1548 init_include_path();
1549
1550 diag_prefix = argv[0];
1551
1552 args = argv;
1553 for (;;) {
1554 char *arg = *++args;
1555 if (!arg)
1556 break;
1557
1558 if (arg[0] == '-' && arg[1]) {
1559 args = handle_switch(arg+1, args);
1560 continue;
1561 }
1562
1563 if (endswith(arg, ".a") || endswith(arg, ".so") ||
1564 endswith(arg, ".so.1") || endswith(arg, ".o"))
1565 continue;
1566
1567 add_ptr_list(filelist, arg);
1568 }
1569 handle_switch_W_finalize();
1570 handle_switch_v_finalize();
1571
1572 // Redirect stdout if needed
1573 if (dump_macro_defs || preprocess_only)
1574 do_output = 1;
1575 if (do_output && outfile && strcmp(outfile, "-")) {
1576 if (!freopen(outfile, "w", stdout))
1577 die("error: cannot open %s: %s", outfile, strerror(errno));
1578 }
1579
1580 if (fdump_ir == 0)
1581 fdump_ir = PASS_FINAL;
1582
1583 list = NULL;
1584 if (filelist) {
1585 // Initialize type system
1586 init_target();
1587 handle_arch_finalize();
1588 init_ctype();
1589
1590 predefined_macros();
1591 create_builtin_stream();
1592 declare_builtins();
1593
1594 list = sparse_initial();
1595
1596 /*
1597 * Protect the initial token allocations, since
1598 * they need to survive all the others
1599 */
1600 protect_token_alloc();
1601 }
1602 /*
1603 * Evaluate the complete symbol list
1604 * Note: This is not needed for normal cases.
1605 * These symbols should only be predefined defines and
1606 * declaratons which will be evaluated later, when needed.
1607 * This is also the case when a file is directly included via
1608 * '-include <file>' on the command line *AND* the file only
1609 * contains defines, declarations and inline definitions.
1610 * However, in the rare cases where the given file should
1611 * contain some definitions, these will never be evaluated
1612 * and thus won't be able to be linearized correctly.
1613 * Hence the evaluate_symbol_list() here under.
1614 */
1615 evaluate_symbol_list(list);
1616 return list;
1617 }
1618
1619 struct symbol_list * sparse_keep_tokens(char *filename)
1620 {
1621 struct symbol_list *res;
1622
1623 /* Clear previous symbol list */
1624 translation_unit_used_list = NULL;
1625
1626 new_file_scope();
1627 res = sparse_file(filename);
1628
1629 /* And return it */
1630 return res;
1631 }
1632
1633
1634 struct symbol_list * __sparse(char *filename)
1635 {
1636 struct symbol_list *res;
1637
1638 res = sparse_keep_tokens(filename);
1639
1640 /* Drop the tokens for this file after parsing */
1641 clear_token_alloc();
1642
1643 /* And return it */
1644 return res;
1645 }
1646
1647 struct symbol_list * sparse(char *filename)
1648 {
1649 struct symbol_list *res = __sparse(filename);
1650
1651 if (has_error & ERROR_CURR_PHASE)
1652 has_error = ERROR_PREV_PHASE;
1653 /* Evaluate the complete symbol list */
1654 evaluate_symbol_list(res);
1655
1656 return res;
1657 }