1
2 /*
3 * CDDL HEADER START
4 *
5 * The contents of this file are subject to the terms of the
6 * Common Development and Distribution License (the "License").
7 * You may not use this file except in compliance with the License.
8 *
9 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
10 * or http://www.opensolaris.org/os/licensing.
11 * See the License for the specific language governing permissions
12 * and limitations under the License.
13 *
14 * When distributing Covered Code, include this CDDL HEADER in each
15 * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
16 * If applicable, add the following below this CDDL HEADER, with the
17 * fields enclosed by brackets "[]" replaced with your own identifying
18 * information: Portions Copyright [yyyy] [name of copyright owner]
19 *
20 * CDDL HEADER END
21 */
22
23 /*
24 * Copyright 2010 Sun Microsystems, Inc. All rights reserved.
25 * Use is subject to license terms.
26 *
27 * Copyright 2018 Richard Lowe.
28 * Copyright 2019 Joyent, Inc.
29 */
30
31 /*
32 * Wrapper for the GNU C compiler to make it accept the Sun C compiler
33 * arguments where possible.
34 *
35 * Since the translation is inexact, this is something of a work-in-progress.
36 *
37 */
38
39 /*
40 * If you modify this file, you must increment CW_VERSION. This is a semver,
41 * incompatible changes should bump the major, anything else the minor.
42 */
43 #define CW_VERSION "9.1"
44
45 /*
46 * -# Verbose mode
47 * -### Show compiler commands built by driver, no compilation
48 * -A<name[(tokens)]> Preprocessor predicate assertion
49 * -C Prevent preprocessor from removing comments
50 * -c Compile only - produce .o files, suppress linking
51 * -D<name[=token]> Associate name with token as if by #define
52 * -d[y|n] dynamic [-dy] or static [-dn] option to linker
53 * -E Compile source through preprocessor only, output to stdout
54 * -erroff=<t> Suppress warnings specified by tags t(%none, %all, <tag list>)
55 * -errtags=<a> Display messages with tags a(no, yes)
56 * -errwarn=<t> Treats warnings specified by tags t(%none, %all, <tag list>)
57 * as errors
58 * -g Compile for debugging
59 * -H Print path name of each file included during compilation
60 * -h <name> Assign <name> to generated dynamic shared library
61 * -I<dir> Add <dir> to preprocessor #include file search path
62 * -i Passed to linker to ignore any LD_LIBRARY_PATH setting
63 * -keeptmp Keep temporary files created during compilation
64 * -L<dir> Pass to linker to add <dir> to the library search path
65 * -l<name> Link with library lib<name>.a or lib<name>.so
66 * -mt Specify options needed when compiling multi-threaded code
67 * -O Use default optimization level (-xO2 or -xO3. Check man page.)
68 * -o <outputfile> Set name of output file to <outputfile>
69 * -P Compile source through preprocessor only, output to .i file
70 * -p Compile for profiling with prof
71 * -R<dir[:dir]> Build runtime search path list into executable
72 * -S Compile and only generate assembly code (.s)
73 * -s Strip symbol table from the executable file
74 * -t Turn off duplicate symbol warnings when linking
75 * -U<name> Delete initial definition of preprocessor symbol <name>
76 * -V Report version number of each compilation phase
77 * -v Do stricter semantic checking
78 * -W<c>,<arg> Pass <arg> to specified component <c> (a,l,m,p,0,2,h,i,u)
79 * -w Suppress compiler warning messages
80 * -Xa Compile assuming ANSI C conformance, allow K & R extensions
81 * (default mode)
82 * -Xs Compile assuming (pre-ANSI) K & R C style code
83 * -xarch=<a> Specify target architecture instruction set
84 * -xbuiltin[=<b>] When profitable inline, or substitute intrinisic functions
85 * for system functions, b={%all,%none}
86 * -xchip=<c> Specify the target processor for use by the optimizer
87 * -xO<n> Generate optimized code (n={1|2|3|4|5})
88 * -xtarget=<t> Specify target system for optimization
89 * -YI,<dir> Specify <dir> for location of headers
90 */
91
92 /*
93 * Translation table:
94 */
95 /*
96 * -# -v
97 * -### error
98 * -A<name[(tokens)]> pass-thru
99 * -B<[static|dynamic]> pass-thru (syntax error for anything else)
100 * -C pass-thru
101 * -c pass-thru
102 * -D<name[=token]> pass-thru
103 * -E pass-thru
104 * -errtags=%all -Wall
105 * -errwarn=%all -Werror else -Wno-error
106 * -g pass-thru
107 * -H pass-thru
108 * -I<dir> pass-thru
109 * -i pass-thru
110 * -keeptmp -save-temps
111 * -L<dir> pass-thru
112 * -l<name> pass-thru
113 * -mt -D_REENTRANT
114 * -nolib -nodefaultlibs
115 * -O -O1 (Check the man page to be certain)
116 * -o <outputfile> pass-thru
117 * -P -E -o filename.i (or error)
118 * -p pass-thru
119 * -R<dir[:dir]> pass-thru
120 * -S pass-thru
121 * -U<name> pass-thru
122 * -V --version
123 * -v -Wall
124 * -Wa,<arg> pass-thru
125 * -Wp,<arg> pass-thru
126 * -Wl,<arg> pass-thru
127 * -xmodel=kernel -ffreestanding -mcmodel=kernel -mno-red-zone
128 * -Wu,-save_args -msave-args
129 * -w pass-thru
130 * -Xa -std=iso9899:199409 or -ansi
131 * -Xs -traditional -std=c89
132 * -xarch=<a> table
133 * -xbuiltin[=<b>] -fbuiltin (-fno-builtin otherwise)
134 * -xchip=<c> table
135 * -xO<n> -O<n>
136 * -xtarget=<t> table
137 * -xtransition -Wtransition
138 * -YI,<dir> -nostdinc -I<dir>
139 */
140
141 #include <ctype.h>
142 #include <err.h>
143 #include <errno.h>
144 #include <fcntl.h>
145 #include <getopt.h>
146 #include <stdio.h>
147 #include <stdlib.h>
148 #include <stdbool.h>
149 #include <string.h>
150 #include <unistd.h>
151 #include <dirent.h>
152
153 #include <sys/param.h>
154 #include <sys/stat.h>
155 #include <sys/types.h>
156 #include <sys/utsname.h>
157 #include <sys/wait.h>
158
159 #define CW_F_CXX 0x01
160 #define CW_F_SHADOW 0x02
161 #define CW_F_EXEC 0x04
162 #define CW_F_ECHO 0x08
163 #define CW_F_XLATE 0x10
164 #define CW_F_PROG 0x20
165
166 typedef enum cw_op {
167 CW_O_NONE = 0,
168 CW_O_PREPROCESS,
169 CW_O_COMPILE,
170 CW_O_LINK
171 } cw_op_t;
172
173 struct aelist {
174 struct ae {
175 struct ae *ae_next;
176 char *ae_arg;
177 } *ael_head, *ael_tail;
178 int ael_argc;
179 };
180
181 typedef enum {
182 GNU,
183 SUN,
184 SMATCH
185 } compiler_style_t;
186
187 typedef struct {
188 char *c_name;
189 char *c_path;
190 compiler_style_t c_style;
191 } cw_compiler_t;
192
193 typedef struct cw_ictx {
194 struct cw_ictx *i_next;
195 cw_compiler_t *i_compiler;
196 char *i_linker;
197 struct aelist *i_ae;
198 uint32_t i_flags;
199 int i_oldargc;
200 char **i_oldargv;
201 pid_t i_pid;
202 char *i_tmpdir;
203 char *i_stderr;
204 } cw_ictx_t;
205
206 /*
207 * Status values to indicate which Studio compiler and associated
208 * flags are being used.
209 */
210 #define M32 0x01 /* -m32 - only on Studio 12 */
211 #define M64 0x02 /* -m64 - only on Studio 12 */
212 #define SS11 0x100 /* Studio 11 */
213 #define SS12 0x200 /* Studio 12 */
214
215 #define TRANS_ENTRY 5
216 /*
217 * Translation table definition for the -xarch= flag. The "x_arg"
218 * value is translated into the appropriate gcc flags according
219 * to the values in x_trans[n]. The x_flags indicates what compiler
220 * is being used and what flags have been set via the use of
221 * "x_arg".
222 */
223 typedef struct xarch_table {
224 char *x_arg;
225 int x_flags;
226 char *x_trans[TRANS_ENTRY];
227 } xarch_table_t;
228
229 /*
230 * The translation table for the -xarch= flag used in the Studio compilers.
231 */
232 static const xarch_table_t xtbl[] = {
233 #if defined(__x86)
234 { "generic", SS11, {NULL} },
235 { "generic64", (SS11|M64), { "-m64", "-mtune=opteron" } },
236 { "amd64", (SS11|M64), { "-m64", "-mtune=opteron" } },
237 { "386", SS11, { "-march=i386" } },
238 { "pentium_pro", SS11, { "-march=pentiumpro" } },
239 { "sse", SS11, { "-msse", "-mfpmath=sse" } },
240 { "sse2", SS11, { "-msse2", "-mfpmath=sse" } },
241 #endif
242 };
243
244 static int xtbl_size = sizeof (xtbl) / sizeof (xarch_table_t);
245
246 static const char *xchip_tbl[] = {
247 #if defined(__x86)
248 "386", "-mtune=i386", NULL,
249 "486", "-mtune=i486", NULL,
250 "pentium", "-mtune=pentium", NULL,
251 "pentium_pro", "-mtune=pentiumpro", NULL,
252 #endif
253 NULL, NULL
254 };
255
256 static const char *xtarget_tbl[] = {
257 #if defined(__x86)
258 "pentium_pro", "-march=pentiumpro", NULL,
259 #endif /* __x86 */
260 NULL, NULL
261 };
262
263 static void
nomem(void)264 nomem(void)
265 {
266 errx(1, "out of memory");
267 }
268
269 static void
newae(struct aelist * ael,const char * arg)270 newae(struct aelist *ael, const char *arg)
271 {
272 struct ae *ae;
273
274 if ((ae = calloc(1, sizeof (*ae))) == NULL)
275 nomem();
276 ae->ae_arg = strdup(arg);
277 if (ael->ael_tail == NULL)
278 ael->ael_head = ae;
279 else
280 ael->ael_tail->ae_next = ae;
281 ael->ael_tail = ae;
282 ael->ael_argc++;
283 }
284
285 static cw_ictx_t *
newictx(void)286 newictx(void)
287 {
288 cw_ictx_t *ctx = calloc(1, sizeof (cw_ictx_t));
289 if (ctx)
290 if ((ctx->i_ae = calloc(1, sizeof (struct aelist))) == NULL) {
291 free(ctx);
292 return (NULL);
293 }
294
295 return (ctx);
296 }
297
298 static void
error(const char * arg)299 error(const char *arg)
300 {
301 errx(2, "error: mapping failed at or near arg '%s'", arg);
302 }
303
304 /*
305 * Add the current favourite set of warnings to the gcc invocation.
306 */
307 static void
warnings(struct aelist * h)308 warnings(struct aelist *h)
309 {
310 static int warningsonce;
311
312 if (warningsonce++)
313 return;
314
315 /*
316 * Enable as many warnings as exist, then disable those that we never
317 * ever want.
318 */
319 newae(h, "-Wall");
320 newae(h, "-Wextra");
321 }
322
323 static void
optim_disable(struct aelist * h,int level)324 optim_disable(struct aelist *h, int level)
325 {
326 if (level >= 2) {
327 newae(h, "-fno-strict-aliasing");
328 newae(h, "-fno-unit-at-a-time");
329 newae(h, "-fno-optimize-sibling-calls");
330 }
331 }
332
333 static void
Xsmode(struct aelist * h)334 Xsmode(struct aelist *h)
335 {
336 static int xsonce;
337
338 if (xsonce++)
339 return;
340
341 newae(h, "-traditional");
342 newae(h, "-traditional-cpp");
343 }
344
345 static void
usage(void)346 usage(void)
347 {
348 extern char *__progname;
349 (void) fprintf(stderr,
350 "usage: %s [-C] [--tag arg] [--versions] --primary <compiler> "
351 "[--shadow <compiler>]... -- cflags...\n",
352 __progname);
353 (void) fprintf(stderr, "compilers take the form: name,path,style\n"
354 " - name: a unique name usable in flag specifiers\n"
355 " - path: path to the compiler binary\n"
356 " - style: the style of flags expected: either sun or gnu\n");
357 exit(2);
358 }
359
360 static int
xlate_xtb(struct aelist * h,const char * xarg)361 xlate_xtb(struct aelist *h, const char *xarg)
362 {
363 int i, j;
364
365 for (i = 0; i < xtbl_size; i++) {
366 if (strcmp(xtbl[i].x_arg, xarg) == 0)
367 break;
368 }
369
370 /*
371 * At the end of the table and so no matching "arg" entry
372 * found and so this must be a bad -xarch= flag.
373 */
374 if (i == xtbl_size)
375 error(xarg);
376
377 for (j = 0; j < TRANS_ENTRY; j++) {
378 if (xtbl[i].x_trans[j] != NULL)
379 newae(h, xtbl[i].x_trans[j]);
380 else
381 break;
382 }
383 return (xtbl[i].x_flags);
384
385 }
386
387 static void
xlate(struct aelist * h,const char * xarg,const char ** table)388 xlate(struct aelist *h, const char *xarg, const char **table)
389 {
390 while (*table != NULL && strcmp(xarg, *table) != 0) {
391 while (*table != NULL)
392 table++;
393 table++;
394 }
395
396 if (*table == NULL)
397 error(xarg);
398
399 table++;
400
401 while (*table != NULL) {
402 newae(h, *table);
403 table++;
404 }
405 }
406
407 /*
408 * The compiler wants the output file to end in appropriate extension. If
409 * we're generating a name from whole cloth (path == NULL), we assume that
410 * extension to be .o, otherwise we match the extension of the caller.
411 */
412 static char *
discard_file_name(cw_ictx_t * ctx,const char * path)413 discard_file_name(cw_ictx_t *ctx, const char *path)
414 {
415 char *ret, *ext;
416 char tmpl[] = "cwXXXXXX";
417
418 if (path == NULL) {
419 ext = ".o";
420 } else {
421 ext = strrchr(path, '.');
422 }
423
424 /*
425 * We need absolute control over where the temporary file goes, since
426 * we rely on it for cleanup so tempnam(3C) and tmpnam(3C) are
427 * inappropriate (they use TMPDIR, preferentially).
428 *
429 * mkstemp(3C) doesn't actually help us, since the temporary file
430 * isn't used by us, only its name.
431 */
432 if (mktemp(tmpl) == NULL)
433 nomem();
434
435 (void) asprintf(&ret, "%s/%s%s", ctx->i_tmpdir, tmpl,
436 (ext != NULL) ? ext : "");
437
438 if (ret == NULL)
439 nomem();
440
441 return (ret);
442 }
443
444 static bool
is_source_file(const char * path)445 is_source_file(const char *path)
446 {
447 char *ext = strrchr(path, '.');
448
449 if ((ext == NULL) || (*(ext + 1) == '\0'))
450 return (false);
451
452 ext += 1;
453
454 if ((strcasecmp(ext, "c") == 0) ||
455 (strcmp(ext, "cc") == 0) ||
456 (strcmp(ext, "i") == 0) ||
457 (strcasecmp(ext, "s") == 0) ||
458 (strcmp(ext, "cpp") == 0)) {
459 return (true);
460 }
461
462 return (false);
463 }
464
465 static bool
is_asm_file(const char * path)466 is_asm_file(const char *path)
467 {
468 char *ext = strrchr(path, '.');
469
470 if ((ext == NULL) || (*(ext + 1) == '\0'))
471 return (false);
472
473 ext += 1;
474
475 if (strcasecmp(ext, "s") == 0)
476 return (true);
477
478 return (false);
479 }
480
481 static void
do_gcc(cw_ictx_t * ctx)482 do_gcc(cw_ictx_t *ctx)
483 {
484 int c;
485 int nolibc = 0;
486 int in_output = 0, seen_o = 0, c_files = 0;
487 cw_op_t op = CW_O_LINK;
488 char *model = NULL;
489 char *nameflag;
490 int mflag = 0;
491
492 if (ctx->i_flags & CW_F_PROG) {
493 newae(ctx->i_ae, "--version");
494 return;
495 }
496
497 newae(ctx->i_ae, "-fident");
498 newae(ctx->i_ae, "-finline");
499 newae(ctx->i_ae, "-fno-inline-functions");
500 newae(ctx->i_ae, "-fno-builtin");
501 newae(ctx->i_ae, "-fno-asm");
502 newae(ctx->i_ae, "-fdiagnostics-show-option");
503 newae(ctx->i_ae, "-nodefaultlibs");
504
505 /*
506 * This is needed because 'u' is defined
507 * under a conditional on 'sun'. Should
508 * probably just remove the conditional,
509 * or make it be dependent on '__sun'.
510 *
511 * -Dunix is also missing in enhanced ANSI mode
512 */
513 newae(ctx->i_ae, "-D__sun");
514
515 if (asprintf(&nameflag, "-_%s=", ctx->i_compiler->c_name) == -1)
516 nomem();
517
518 /*
519 * Walk the argument list, translating as we go ..
520 */
521 while (--ctx->i_oldargc > 0) {
522 char *arg = *++ctx->i_oldargv;
523 size_t arglen = strlen(arg);
524
525 if (*arg == '-') {
526 arglen--;
527 } else {
528 if (!in_output && is_source_file(arg))
529 c_files++;
530
531 /*
532 * Otherwise, filenames and partial arguments
533 * are passed through for gcc to chew on. However,
534 * output is always discarded for the secondary
535 * compiler.
536 */
537 if ((ctx->i_flags & CW_F_SHADOW) && in_output) {
538 newae(ctx->i_ae, discard_file_name(ctx, arg));
539 } else {
540 newae(ctx->i_ae, arg);
541 }
542 in_output = 0;
543 continue;
544 }
545
546 if (ctx->i_flags & CW_F_CXX) {
547 if (strncmp(arg, "-_g++=", 6) == 0) {
548 newae(ctx->i_ae, strchr(arg, '=') + 1);
549 continue;
550 }
551
552 if (strcmp(arg, "-xwe") == 0) {
553 /* turn warnings into errors */
554 newae(ctx->i_ae, "-Werror");
555 continue;
556 }
557 if (strcmp(arg, "-nolib") == 0) {
558 /* -nodefaultlibs is on by default */
559 nolibc = 1;
560 continue;
561 }
562 }
563
564 switch ((c = arg[1])) {
565 case '_':
566 if ((strncmp(arg, nameflag, strlen(nameflag)) == 0) ||
567 (strncmp(arg, "-_gcc=", 6) == 0) ||
568 (strncmp(arg, "-_gnu=", 6) == 0)) {
569 newae(ctx->i_ae, strchr(arg, '=') + 1);
570 }
571 break;
572 case '#':
573 if (arglen == 1) {
574 newae(ctx->i_ae, "-v");
575 break;
576 }
577 error(arg);
578 break;
579 case 'f':
580 if ((strcmp(arg, "-fpic") == 0) ||
581 (strcmp(arg, "-fPIC") == 0)) {
582 newae(ctx->i_ae, arg);
583 break;
584 }
585 error(arg);
586 break;
587 case 'E':
588 if (arglen == 1) {
589 newae(ctx->i_ae, "-xc");
590 newae(ctx->i_ae, arg);
591 op = CW_O_PREPROCESS;
592 nolibc = 1;
593 break;
594 }
595 error(arg);
596 break;
597 case 'c':
598 case 'S':
599 if (arglen == 1) {
600 op = CW_O_COMPILE;
601 nolibc = 1;
602 }
603 /* FALLTHROUGH */
604 case 'C':
605 case 'H':
606 case 'p':
607 if (arglen == 1) {
608 newae(ctx->i_ae, arg);
609 break;
610 }
611 error(arg);
612 break;
613 case 'A':
614 case 'g':
615 case 'I':
616 case 'i':
617 case 'L':
618 case 'l':
619 case 'R':
620 case 'U':
621 case 'u':
622 case 'w':
623 newae(ctx->i_ae, arg);
624 break;
625 case 'o':
626 seen_o = 1;
627 if (arglen == 1) {
628 in_output = 1;
629 newae(ctx->i_ae, arg);
630 } else if (ctx->i_flags & CW_F_SHADOW) {
631 newae(ctx->i_ae, "-o");
632 newae(ctx->i_ae, discard_file_name(ctx, arg));
633 } else {
634 newae(ctx->i_ae, arg);
635 }
636 break;
637 case 'D':
638 newae(ctx->i_ae, arg);
639 /*
640 * XXX Clearly a hack ... do we need _KADB too?
641 */
642 if (strcmp(arg, "-D_KERNEL") == 0 ||
643 strcmp(arg, "-D_BOOT") == 0)
644 newae(ctx->i_ae, "-ffreestanding");
645 break;
646 case 'e':
647 if (strcmp(arg, "-errtags=yes") == 0) {
648 warnings(ctx->i_ae);
649 break;
650 }
651 if (strcmp(arg, "-errwarn=%all") == 0) {
652 newae(ctx->i_ae, "-Werror");
653 break;
654 }
655 error(arg);
656 break;
657 case 'k':
658 if (strcmp(arg, "-keeptmp") == 0) {
659 newae(ctx->i_ae, "-save-temps");
660 break;
661 }
662 error(arg);
663 break;
664 case 'm':
665 if (strcmp(arg, "-mt") == 0) {
666 newae(ctx->i_ae, "-D_REENTRANT");
667 break;
668 }
669 if (strcmp(arg, "-m64") == 0) {
670 newae(ctx->i_ae, "-m64");
671 #if defined(__x86)
672 newae(ctx->i_ae, "-mtune=opteron");
673 #endif
674 mflag |= M64;
675 break;
676 }
677 if (strcmp(arg, "-m32") == 0) {
678 newae(ctx->i_ae, "-m32");
679 mflag |= M32;
680 break;
681 }
682 error(arg);
683 break;
684 case 'O':
685 if (arglen == 1) {
686 newae(ctx->i_ae, "-O");
687 break;
688 }
689 error(arg);
690 break;
691 case 'P':
692 /*
693 * We could do '-E -o filename.i', but that's hard,
694 * and we don't need it for the case that's triggering
695 * this addition. We'll require the user to specify
696 * -o in the Makefile. If they don't they'll find out
697 * in a hurry.
698 */
699 newae(ctx->i_ae, "-E");
700 op = CW_O_PREPROCESS;
701 nolibc = 1;
702 break;
703 case 's':
704 if (strcmp(arg, "-shared") == 0) {
705 newae(ctx->i_ae, "-shared");
706 nolibc = 1;
707 break;
708 }
709 error(arg);
710 break;
711
712 case 'V':
713 if (arglen == 1) {
714 ctx->i_flags &= ~CW_F_ECHO;
715 newae(ctx->i_ae, "--version");
716 break;
717 }
718 error(arg);
719 break;
720 case 'v':
721 if (arglen == 1) {
722 warnings(ctx->i_ae);
723 break;
724 }
725 error(arg);
726 break;
727 case 'W':
728 if (strncmp(arg, "-Wa,", 4) == 0 ||
729 strncmp(arg, "-Wp,", 4) == 0 ||
730 strncmp(arg, "-Wl,", 4) == 0) {
731 newae(ctx->i_ae, arg);
732 break;
733 }
734
735 #if defined(__x86)
736 if (strcmp(arg, "-Wu,-save_args") == 0) {
737 newae(ctx->i_ae, "-msave-args");
738 break;
739 }
740 #endif /* __x86 */
741 error(arg);
742 break;
743 case 'X':
744 if (strcmp(arg, "-Xs") == 0) {
745 Xsmode(ctx->i_ae);
746 break;
747 }
748 error(arg);
749 break;
750 case 'x':
751 if (arglen == 1)
752 error(arg);
753 switch (arg[2]) {
754 case 'a':
755 if (strncmp(arg, "-xarch=", 7) == 0) {
756 mflag |= xlate_xtb(ctx->i_ae, arg + 7);
757 break;
758 }
759 error(arg);
760 break;
761 case 'b':
762 if (strncmp(arg, "-xbuiltin=", 10) == 0) {
763 if (strcmp(arg + 10, "%all"))
764 newae(ctx->i_ae, "-fbuiltin");
765 break;
766 }
767 error(arg);
768 break;
769 case 'c':
770 if (strncmp(arg, "-xc99=%all", 10) == 0) {
771 newae(ctx->i_ae, "-std=gnu99");
772 break;
773 }
774 if (strncmp(arg, "-xc99=%none", 11) == 0) {
775 newae(ctx->i_ae, "-std=gnu89");
776 break;
777 }
778 if (strncmp(arg, "-xchip=", 7) == 0) {
779 xlate(ctx->i_ae, arg + 7, xchip_tbl);
780 break;
781 }
782
783 error(arg);
784 break;
785 #if defined(__x86)
786 case 'm':
787 if (strcmp(arg, "-xmodel=kernel") == 0) {
788 newae(ctx->i_ae, "-ffreestanding");
789 newae(ctx->i_ae, "-mno-red-zone");
790 model = "-mcmodel=kernel";
791 nolibc = 1;
792 break;
793 }
794 error(arg);
795 break;
796 #endif /* __x86 */
797 case 'O':
798 if (strncmp(arg, "-xO", 3) == 0) {
799 size_t len = strlen(arg);
800 char *s = NULL;
801 int c = *(arg + 3);
802 int level;
803
804 if (len != 4 || !isdigit(c))
805 error(arg);
806
807 level = atoi(arg + 3);
808 if (level > 5)
809 error(arg);
810 if (level >= 2) {
811 /*
812 * For gcc-3.4.x at -O2 we
813 * need to disable optimizations
814 * that break ON.
815 */
816 optim_disable(ctx->i_ae, level);
817 /*
818 * limit -xO3 to -O2 as well.
819 */
820 level = 2;
821 }
822 if (asprintf(&s, "-O%d", level) == -1)
823 nomem();
824 newae(ctx->i_ae, s);
825 free(s);
826 break;
827 }
828 error(arg);
829 break;
830 case 't':
831 if (strncmp(arg, "-xtarget=", 9) == 0) {
832 xlate(ctx->i_ae, arg + 9, xtarget_tbl);
833 break;
834 }
835 error(arg);
836 break;
837 default:
838 error(arg);
839 break;
840 }
841 break;
842 case 'Y':
843 if (arglen == 1) {
844 if ((arg = *++ctx->i_oldargv) == NULL ||
845 *arg == '\0')
846 error("-Y");
847 ctx->i_oldargc--;
848 arglen = strlen(arg + 1);
849 } else {
850 arg += 2;
851 }
852 if (strncmp(arg, "I,", 2) == 0) {
853 char *s = strdup(arg);
854 s[0] = '-';
855 s[1] = 'I';
856 newae(ctx->i_ae, "-nostdinc");
857 newae(ctx->i_ae, s);
858 free(s);
859 break;
860 }
861 error(arg);
862 break;
863 default:
864 error(arg);
865 break;
866 }
867 }
868
869 free(nameflag);
870
871 /*
872 * When compiling multiple source files in a single invocation some
873 * compilers output objects into the current directory with
874 * predictable and conventional names.
875 *
876 * We prevent any attempt to compile multiple files at once so that
877 * any such objects created by a shadow can't escape into a later
878 * link-edit.
879 */
880 if (c_files > 1 && op != CW_O_PREPROCESS) {
881 errx(2, "multiple source files are "
882 "allowed only with -E or -P");
883 }
884
885 /*
886 * Make sure that we do not have any unintended interactions between
887 * the xarch options passed in and the version of the Studio compiler
888 * used.
889 */
890 if ((mflag & (SS11|SS12)) == (SS11|SS12)) {
891 errx(2,
892 "Conflicting \"-xarch=\" flags (both Studio 11 and 12)\n");
893 }
894
895 switch (mflag) {
896 case 0:
897 case M32:
898 case M64:
899 case SS12:
900 case SS11:
901 case (SS11|M32):
902 case (SS11|M64):
903 case (SS12|M32):
904 case (SS12|M64):
905 break;
906 default:
907 (void) fprintf(stderr,
908 "Incompatible -xarch= and/or -m32/-m64 options used.\n");
909 exit(2);
910 }
911
912 if (ctx->i_flags & CW_F_SHADOW) {
913 if (op == CW_O_PREPROCESS)
914 exit(0);
915 else if (op == CW_O_LINK && c_files == 0)
916 exit(0);
917 }
918
919 if (model != NULL)
920 newae(ctx->i_ae, model);
921 if (!nolibc)
922 newae(ctx->i_ae, "-lc");
923 if (!seen_o && (ctx->i_flags & CW_F_SHADOW)) {
924 newae(ctx->i_ae, "-o");
925 newae(ctx->i_ae, discard_file_name(ctx, NULL));
926 }
927 }
928
929 static void
do_smatch(cw_ictx_t * ctx)930 do_smatch(cw_ictx_t *ctx)
931 {
932 if (ctx->i_flags & CW_F_PROG) {
933 newae(ctx->i_ae, "--version");
934 return;
935 }
936
937 /*
938 * Some sources shouldn't run smatch at all.
939 */
940 for (int i = 0; i < ctx->i_oldargc; i++) {
941 char *arg = ctx->i_oldargv[i];
942
943 if (strcmp(arg, "-_smatch=off") == 0) {
944 ctx->i_flags &= ~(CW_F_EXEC | CW_F_ECHO);
945 return;
946 }
947
948 /* smatch can't handle asm */
949 if ((arg[0] != '-') && is_asm_file(arg)) {
950 ctx->i_flags &= ~(CW_F_EXEC | CW_F_ECHO);
951 return;
952 }
953 }
954
955 /*
956 * smatch can handle gcc's options.
957 */
958 do_gcc(ctx);
959 }
960
961 static void
do_cc(cw_ictx_t * ctx)962 do_cc(cw_ictx_t *ctx)
963 {
964 int in_output = 0, seen_o = 0, c_files = 0;
965 cw_op_t op = CW_O_LINK;
966 char *nameflag;
967
968 if (ctx->i_flags & CW_F_PROG) {
969 newae(ctx->i_ae, "-V");
970 return;
971 }
972
973 if (asprintf(&nameflag, "-_%s=", ctx->i_compiler->c_name) == -1)
974 nomem();
975
976 while (--ctx->i_oldargc > 0) {
977 char *arg = *++ctx->i_oldargv;
978
979 if (strncmp(arg, "-_CC=", 5) == 0) {
980 newae(ctx->i_ae, strchr(arg, '=') + 1);
981 continue;
982 }
983
984 if (*arg != '-') {
985 if (!in_output && is_source_file(arg))
986 c_files++;
987
988 if (in_output == 0 || !(ctx->i_flags & CW_F_SHADOW)) {
989 newae(ctx->i_ae, arg);
990 } else {
991 in_output = 0;
992 newae(ctx->i_ae, discard_file_name(ctx, arg));
993 }
994 continue;
995 }
996 switch (*(arg + 1)) {
997 case '_':
998 if ((strncmp(arg, nameflag, strlen(nameflag)) == 0) ||
999 (strncmp(arg, "-_cc=", 5) == 0) ||
1000 (strncmp(arg, "-_sun=", 6) == 0)) {
1001 newae(ctx->i_ae, strchr(arg, '=') + 1);
1002 }
1003 break;
1004
1005 case 'V':
1006 ctx->i_flags &= ~CW_F_ECHO;
1007 newae(ctx->i_ae, arg);
1008 break;
1009 case 'o':
1010 seen_o = 1;
1011 if (strlen(arg) == 2) {
1012 in_output = 1;
1013 newae(ctx->i_ae, arg);
1014 } else if (ctx->i_flags & CW_F_SHADOW) {
1015 newae(ctx->i_ae, "-o");
1016 newae(ctx->i_ae, discard_file_name(ctx, arg));
1017 } else {
1018 newae(ctx->i_ae, arg);
1019 }
1020 break;
1021 case 'c':
1022 case 'S':
1023 if (strlen(arg) == 2)
1024 op = CW_O_COMPILE;
1025 newae(ctx->i_ae, arg);
1026 break;
1027 case 'E':
1028 case 'P':
1029 if (strlen(arg) == 2)
1030 op = CW_O_PREPROCESS;
1031 /*FALLTHROUGH*/
1032 default:
1033 newae(ctx->i_ae, arg);
1034 }
1035 }
1036
1037 free(nameflag);
1038
1039 /* See the comment on this same code in do_gcc() */
1040 if (c_files > 1 && op != CW_O_PREPROCESS) {
1041 errx(2, "multiple source files are "
1042 "allowed only with -E or -P");
1043 }
1044
1045 if (ctx->i_flags & CW_F_SHADOW) {
1046 if (op == CW_O_PREPROCESS)
1047 exit(0);
1048 else if (op == CW_O_LINK && c_files == 0)
1049 exit(0);
1050 }
1051
1052 if (!seen_o && (ctx->i_flags & CW_F_SHADOW)) {
1053 newae(ctx->i_ae, "-o");
1054 newae(ctx->i_ae, discard_file_name(ctx, NULL));
1055 }
1056 }
1057
1058 static void
prepctx(cw_ictx_t * ctx)1059 prepctx(cw_ictx_t *ctx)
1060 {
1061 newae(ctx->i_ae, ctx->i_compiler->c_path);
1062
1063 if (ctx->i_flags & CW_F_PROG) {
1064 (void) printf("%s: %s\n", (ctx->i_flags & CW_F_SHADOW) ?
1065 "shadow" : "primary", ctx->i_compiler->c_path);
1066 (void) fflush(stdout);
1067 }
1068
1069 /*
1070 * If LD_ALTEXEC is already set, the expectation would be that that
1071 * link-editor is run, as such we need to leave it the environment
1072 * alone and let that happen.
1073 */
1074 if ((ctx->i_linker != NULL) && (getenv("LD_ALTEXEC") == NULL))
1075 setenv("LD_ALTEXEC", ctx->i_linker, 1);
1076
1077 if (!(ctx->i_flags & CW_F_XLATE))
1078 return;
1079
1080 switch (ctx->i_compiler->c_style) {
1081 case SUN:
1082 do_cc(ctx);
1083 break;
1084 case GNU:
1085 do_gcc(ctx);
1086 break;
1087 case SMATCH:
1088 do_smatch(ctx);
1089 break;
1090 }
1091 }
1092
1093 static int
invoke(cw_ictx_t * ctx)1094 invoke(cw_ictx_t *ctx)
1095 {
1096 char **newargv, *makeflags;
1097 int ac;
1098 struct ae *a;
1099
1100 newargv = calloc(ctx->i_ae->ael_argc + 1, sizeof (*newargv));
1101 if (newargv == NULL)
1102 nomem();
1103
1104 /*
1105 * Check to see if the silent make flag is present (-s), if so, do not
1106 * echo. The MAKEFLAGS environment variable is set by dmake. By
1107 * observation it appears to place short flags without any arguments
1108 * first followed by any long form flags or flags with arguments.
1109 */
1110 makeflags = getenv("MAKEFLAGS");
1111 if (makeflags != NULL) {
1112 size_t makeflags_len = strlen(makeflags);
1113 for (size_t i = 0; i < makeflags_len; i++) {
1114 if (makeflags[i] == 's') {
1115 ctx->i_flags &= ~CW_F_ECHO;
1116 break;
1117 }
1118 /* end of short flags */
1119 if (makeflags[i] == ' ')
1120 break;
1121 }
1122 }
1123
1124 if (ctx->i_flags & CW_F_ECHO)
1125 (void) fprintf(stderr, "+ ");
1126
1127 for (ac = 0, a = ctx->i_ae->ael_head; a; a = a->ae_next, ac++) {
1128 newargv[ac] = a->ae_arg;
1129 if (ctx->i_flags & CW_F_ECHO)
1130 (void) fprintf(stderr, "%s ", a->ae_arg);
1131 if (a == ctx->i_ae->ael_tail)
1132 break;
1133 }
1134
1135 if (ctx->i_flags & CW_F_ECHO) {
1136 (void) fprintf(stderr, "\n");
1137 (void) fflush(stderr);
1138 }
1139
1140 if (!(ctx->i_flags & CW_F_EXEC))
1141 return (0);
1142
1143 /*
1144 * We must fix up the environment here so that the dependency files are
1145 * not trampled by the shadow compiler. Also take care of GCC
1146 * environment variables that will throw off gcc. This assumes a primary
1147 * gcc.
1148 */
1149 if ((ctx->i_flags & CW_F_SHADOW) &&
1150 (unsetenv("SUNPRO_DEPENDENCIES") != 0 ||
1151 unsetenv("DEPENDENCIES_OUTPUT") != 0 ||
1152 unsetenv("GCC_ROOT") != 0)) {
1153 (void) fprintf(stderr, "error: environment setup failed: %s\n",
1154 strerror(errno));
1155 return (-1);
1156 }
1157
1158 (void) execv(newargv[0], newargv);
1159 warn("couldn't run %s", newargv[0]);
1160
1161 return (-1);
1162 }
1163
1164 static int
reap(cw_ictx_t * ctx)1165 reap(cw_ictx_t *ctx)
1166 {
1167 int status, ret = 0;
1168 char buf[1024];
1169 struct stat s;
1170
1171 /*
1172 * Only wait for one specific child.
1173 */
1174 if (ctx->i_pid <= 0)
1175 return (-1);
1176
1177 do {
1178 if (waitpid(ctx->i_pid, &status, 0) < 0) {
1179 warn("cannot reap child");
1180 return (-1);
1181 }
1182 if (status != 0) {
1183 if (WIFSIGNALED(status)) {
1184 ret = -WTERMSIG(status);
1185 break;
1186 } else if (WIFEXITED(status)) {
1187 ret = WEXITSTATUS(status);
1188 break;
1189 }
1190 }
1191 } while (!WIFEXITED(status) && !WIFSIGNALED(status));
1192
1193 if (stat(ctx->i_stderr, &s) < 0) {
1194 warn("stat failed on child cleanup");
1195 return (-1);
1196 }
1197 if (s.st_size != 0) {
1198 FILE *f;
1199
1200 if ((f = fopen(ctx->i_stderr, "r")) != NULL) {
1201 while (fgets(buf, sizeof (buf), f))
1202 (void) fprintf(stderr, "%s", buf);
1203 (void) fflush(stderr);
1204 (void) fclose(f);
1205 }
1206 }
1207 (void) unlink(ctx->i_stderr);
1208 free(ctx->i_stderr);
1209
1210 /*
1211 * cc returns an error code when given -V; we want that to succeed.
1212 */
1213 if (ctx->i_flags & CW_F_PROG)
1214 return (0);
1215
1216 return (ret);
1217 }
1218
1219 static int
exec_ctx(cw_ictx_t * ctx,int block)1220 exec_ctx(cw_ictx_t *ctx, int block)
1221 {
1222 if ((ctx->i_stderr = tempnam(ctx->i_tmpdir, "cw")) == NULL) {
1223 nomem();
1224 return (-1);
1225 }
1226
1227 if ((ctx->i_pid = fork()) == 0) {
1228 int fd;
1229
1230 (void) fclose(stderr);
1231 if ((fd = open(ctx->i_stderr, O_WRONLY | O_CREAT | O_EXCL,
1232 0666)) < 0) {
1233 err(1, "open failed for standard error");
1234 }
1235 if (dup2(fd, 2) < 0) {
1236 err(1, "dup2 failed for standard error");
1237 }
1238 if (fd != 2)
1239 (void) close(fd);
1240 if (freopen("/dev/fd/2", "w", stderr) == NULL) {
1241 err(1, "freopen failed for /dev/fd/2");
1242 }
1243
1244 prepctx(ctx);
1245 exit(invoke(ctx));
1246 }
1247
1248 if (ctx->i_pid < 0) {
1249 err(1, "fork failed");
1250 }
1251
1252 if (block)
1253 return (reap(ctx));
1254
1255 return (0);
1256 }
1257
1258 static void
parse_compiler(const char * spec,cw_compiler_t * compiler)1259 parse_compiler(const char *spec, cw_compiler_t *compiler)
1260 {
1261 char *tspec, *token;
1262
1263 if ((tspec = strdup(spec)) == NULL)
1264 nomem();
1265
1266 if ((token = strsep(&tspec, ",")) == NULL)
1267 errx(1, "Compiler is missing a name: %s", spec);
1268 compiler->c_name = token;
1269
1270 if ((token = strsep(&tspec, ",")) == NULL)
1271 errx(1, "Compiler is missing a path: %s", spec);
1272 compiler->c_path = token;
1273
1274 if ((token = strsep(&tspec, ",")) == NULL)
1275 errx(1, "Compiler is missing a style: %s", spec);
1276
1277 if ((strcasecmp(token, "gnu") == 0) ||
1278 (strcasecmp(token, "gcc") == 0)) {
1279 compiler->c_style = GNU;
1280 } else if ((strcasecmp(token, "sun") == 0) ||
1281 (strcasecmp(token, "cc") == 0)) {
1282 compiler->c_style = SUN;
1283 } else if ((strcasecmp(token, "smatch") == 0)) {
1284 compiler->c_style = SMATCH;
1285 } else {
1286 errx(1, "unknown compiler style: %s", token);
1287 }
1288
1289 if (tspec != NULL)
1290 errx(1, "Excess tokens in compiler: %s", spec);
1291 }
1292
1293 static void
cleanup(cw_ictx_t * ctx)1294 cleanup(cw_ictx_t *ctx)
1295 {
1296 DIR *dirp;
1297 struct dirent *dp;
1298 char buf[MAXPATHLEN];
1299
1300 if ((dirp = opendir(ctx->i_tmpdir)) == NULL) {
1301 if (errno != ENOENT) {
1302 err(1, "couldn't open temp directory: %s",
1303 ctx->i_tmpdir);
1304 } else {
1305 return;
1306 }
1307 }
1308
1309 errno = 0;
1310 while ((dp = readdir(dirp)) != NULL) {
1311 (void) snprintf(buf, MAXPATHLEN, "%s/%s", ctx->i_tmpdir,
1312 dp->d_name);
1313
1314 if (strcmp(dp->d_name, ".") == 0 ||
1315 strcmp(dp->d_name, "..") == 0) {
1316 continue;
1317 }
1318
1319 if (unlink(buf) == -1)
1320 err(1, "failed to unlink temp file: %s", dp->d_name);
1321 errno = 0;
1322 }
1323
1324 if (errno != 0) {
1325 err(1, "failed to read temporary directory: %s",
1326 ctx->i_tmpdir);
1327 }
1328
1329 (void) closedir(dirp);
1330 if (rmdir(ctx->i_tmpdir) != 0) {
1331 err(1, "failed to unlink temporary directory: %s",
1332 ctx->i_tmpdir);
1333 }
1334 }
1335
1336 int
main(int argc,char ** argv)1337 main(int argc, char **argv)
1338 {
1339 int ch;
1340 cw_compiler_t primary = { NULL, NULL, 0 };
1341 cw_compiler_t shadows[10];
1342 int nshadows = 0;
1343 int ret = 0;
1344 bool do_serial;
1345 bool do_exec;
1346 bool vflg = false;
1347 bool Cflg = false;
1348 bool cflg = false;
1349 bool nflg = false;
1350 char *tmpdir;
1351
1352 cw_ictx_t *main_ctx;
1353
1354 static struct option longopts[] = {
1355 { "compiler", no_argument, NULL, 'c' },
1356 { "linker", required_argument, NULL, 'l' },
1357 { "noecho", no_argument, NULL, 'n' },
1358 { "primary", required_argument, NULL, 'p' },
1359 { "shadow", required_argument, NULL, 's' },
1360 { "tag", required_argument, NULL, 't' },
1361 { "versions", no_argument, NULL, 'v' },
1362 { NULL, 0, NULL, 0 },
1363 };
1364
1365
1366 if ((main_ctx = newictx()) == NULL)
1367 nomem();
1368
1369 while ((ch = getopt_long(argc, argv, "C", longopts, NULL)) != -1) {
1370 switch (ch) {
1371 case 'c':
1372 cflg = true;
1373 break;
1374 case 'C':
1375 Cflg = true;
1376 break;
1377 case 'l':
1378 if ((main_ctx->i_linker = strdup(optarg)) == NULL)
1379 nomem();
1380 break;
1381 case 'n':
1382 nflg = true;
1383 break;
1384 case 'p':
1385 if (primary.c_path != NULL) {
1386 warnx("Only one primary compiler may "
1387 "be specified");
1388 usage();
1389 }
1390
1391 parse_compiler(optarg, &primary);
1392 break;
1393 case 's':
1394 if (nshadows >= 10)
1395 errx(1, "May only use 10 shadows at "
1396 "the moment");
1397 parse_compiler(optarg, &shadows[nshadows]);
1398 nshadows++;
1399 break;
1400 case 't': /* Ignored, a diagnostic in build logs only */
1401 break;
1402 case 'v':
1403 vflg = true;
1404 break;
1405 default:
1406 (void) fprintf(stderr, "Did you forget '--'?\n");
1407 usage();
1408 }
1409 }
1410
1411 if (primary.c_path == NULL) {
1412 warnx("A primary compiler must be specified");
1413 usage();
1414 }
1415
1416 do_serial = getenv("CW_SHADOW_SERIAL") != NULL;
1417 do_exec = getenv("CW_NO_EXEC") == NULL;
1418
1419 /* Leave room for argv[0] */
1420 argc -= (optind - 1);
1421 argv += (optind - 1);
1422
1423 main_ctx->i_oldargc = argc;
1424 main_ctx->i_oldargv = argv;
1425 main_ctx->i_flags = CW_F_XLATE;
1426 if (nflg == 0)
1427 main_ctx->i_flags |= CW_F_ECHO;
1428 if (do_exec)
1429 main_ctx->i_flags |= CW_F_EXEC;
1430 if (Cflg)
1431 main_ctx->i_flags |= CW_F_CXX;
1432 main_ctx->i_compiler = &primary;
1433
1434 if (cflg) {
1435 (void) fputs(primary.c_path, stdout);
1436 }
1437
1438 if (vflg) {
1439 (void) printf("cw version %s\n", CW_VERSION);
1440 (void) fflush(stdout);
1441 main_ctx->i_flags &= ~CW_F_ECHO;
1442 main_ctx->i_flags |= CW_F_PROG | CW_F_EXEC;
1443 do_serial = 1;
1444 }
1445
1446 tmpdir = getenv("TMPDIR");
1447 if (tmpdir == NULL)
1448 tmpdir = "/tmp";
1449
1450 if (asprintf(&main_ctx->i_tmpdir, "%s/cw.XXXXXX", tmpdir) == -1)
1451 nomem();
1452
1453 if ((main_ctx->i_tmpdir = mkdtemp(main_ctx->i_tmpdir)) == NULL)
1454 errx(1, "failed to create temporary directory");
1455
1456 ret |= exec_ctx(main_ctx, do_serial);
1457
1458 for (int i = 0; i < nshadows; i++) {
1459 int r;
1460 cw_ictx_t *shadow_ctx;
1461
1462 if ((shadow_ctx = newictx()) == NULL)
1463 nomem();
1464
1465 (void) memcpy(shadow_ctx, main_ctx, sizeof (cw_ictx_t));
1466
1467 shadow_ctx->i_flags |= CW_F_SHADOW;
1468 shadow_ctx->i_compiler = &shadows[i];
1469
1470 r = exec_ctx(shadow_ctx, do_serial);
1471 if (r == 0) {
1472 shadow_ctx->i_next = main_ctx->i_next;
1473 main_ctx->i_next = shadow_ctx;
1474 }
1475 ret |= r;
1476 }
1477
1478 if (!do_serial) {
1479 cw_ictx_t *next = main_ctx;
1480 while (next != NULL) {
1481 cw_ictx_t *toreap = next;
1482 next = next->i_next;
1483 ret |= reap(toreap);
1484 }
1485 }
1486
1487 cleanup(main_ctx);
1488 return (ret);
1489 }
1490