Annotation of src/usr.bin/make/job.c, Revision 1.154
1.154 ! espie 1: /* $OpenBSD: job.c,v 1.153 2020/01/13 15:19:04 espie Exp $ */
1.6 millert 2: /* $NetBSD: job.c,v 1.16 1996/11/06 17:59:08 christos Exp $ */
1.1 deraadt 3:
4: /*
1.124 espie 5: * Copyright (c) 2012 Marc Espie.
6: *
7: * Extensive code modifications for the OpenBSD project.
8: *
9: * Redistribution and use in source and binary forms, with or without
10: * modification, are permitted provided that the following conditions
11: * are met:
12: * 1. Redistributions of source code must retain the above copyright
13: * notice, this list of conditions and the following disclaimer.
14: * 2. Redistributions in binary form must reproduce the above copyright
15: * notice, this list of conditions and the following disclaimer in the
16: * documentation and/or other materials provided with the distribution.
17: *
18: * THIS SOFTWARE IS PROVIDED BY THE OPENBSD PROJECT AND CONTRIBUTORS
19: * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
20: * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
21: * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE OPENBSD
22: * PROJECT OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
23: * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
24: * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
25: * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
26: * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
27: * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
28: * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
29: */
30: /*
1.1 deraadt 31: * Copyright (c) 1988, 1989, 1990 The Regents of the University of California.
32: * Copyright (c) 1988, 1989 by Adam de Boor
33: * Copyright (c) 1989 by Berkeley Softworks
34: * All rights reserved.
35: *
36: * This code is derived from software contributed to Berkeley by
37: * Adam de Boor.
38: *
39: * Redistribution and use in source and binary forms, with or without
40: * modification, are permitted provided that the following conditions
41: * are met:
42: * 1. Redistributions of source code must retain the above copyright
43: * notice, this list of conditions and the following disclaimer.
44: * 2. Redistributions in binary form must reproduce the above copyright
45: * notice, this list of conditions and the following disclaimer in the
46: * documentation and/or other materials provided with the distribution.
1.55 millert 47: * 3. Neither the name of the University nor the names of its contributors
1.1 deraadt 48: * may be used to endorse or promote products derived from this software
49: * without specific prior written permission.
50: *
51: * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
52: * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
53: * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
54: * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
55: * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
56: * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
57: * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
58: * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
59: * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
60: * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
61: * SUCH DAMAGE.
62: */
63:
64: /*-
65: * job.c --
66: * handle the creation etc. of our child processes.
67: *
68: * Interface:
1.40 espie 69: * Job_Make Start the creation of the given target.
1.1 deraadt 70: *
1.124 espie 71: * Job_Init Called to initialize this module.
72: *
73: * Job_Begin execute commands attached to the .BEGIN target
74: * if any.
1.40 espie 75: *
1.117 espie 76: * can_start_job Return true if we can start job
1.40 espie 77: *
1.41 espie 78: * Job_Empty Return true if the job table is completely
1.40 espie 79: * empty.
80: *
81: * Job_Finish Perform any final processing which needs doing.
82: * This includes the execution of any commands
83: * which have been/were attached to the .END
1.124 espie 84: * target.
1.40 espie 85: *
1.117 espie 86: * Job_AbortAll Abort all current jobs. It doesn't
1.40 espie 87: * handle output or do anything for the jobs,
1.124 espie 88: * just kills them.
1.1 deraadt 89: *
1.117 espie 90: * Job_Wait Wait for all running jobs to finish.
1.1 deraadt 91: */
92:
93: #include <sys/types.h>
94: #include <sys/wait.h>
1.41 espie 95: #include <ctype.h>
96: #include <errno.h>
1.1 deraadt 97: #include <fcntl.h>
1.41 espie 98: #include <signal.h>
1.69 espie 99: #include <stdarg.h>
1.1 deraadt 100: #include <stdio.h>
1.42 espie 101: #include <stdlib.h>
1.1 deraadt 102: #include <string.h>
1.41 espie 103: #include <unistd.h>
104: #include "config.h"
105: #include "defines.h"
1.1 deraadt 106: #include "job.h"
1.63 espie 107: #include "engine.h"
1.1 deraadt 108: #include "pathnames.h"
1.41 espie 109: #include "var.h"
110: #include "targ.h"
111: #include "error.h"
1.124 espie 112: #include "extern.h"
1.41 espie 113: #include "lst.h"
114: #include "gnode.h"
115: #include "memory.h"
116: #include "make.h"
1.124 espie 117: #include "buf.h"
1.78 espie 118:
1.40 espie 119: static int aborting = 0; /* why is the make aborting? */
120: #define ABORT_ERROR 1 /* Because of an error */
121: #define ABORT_INTERRUPT 2 /* Because it was interrupted */
122: #define ABORT_WAIT 3 /* Waiting for jobs to finish */
1.1 deraadt 123:
1.124 espie 124: static bool no_new_jobs; /* Mark recursive shit so we shouldn't start
125: * something else at the same time
126: */
1.148 espie 127: bool sequential;
1.124 espie 128: Job *runningJobs; /* Jobs currently running a process */
129: Job *errorJobs; /* Jobs in error at end */
1.148 espie 130: Job *availableJobs; /* Pool of available jobs */
1.124 espie 131: static Job *heldJobs; /* Jobs not running yet because of expensive */
1.134 espie 132: static pid_t mypid; /* Used for printing debugging messages */
1.148 espie 133: static Job *extra_job; /* Needed for .INTERRUPT */
1.153 espie 134: static bool compatMode; /* If we're running with compat.c don't call Make_Update */
1.1 deraadt 135:
1.128 espie 136: static volatile sig_atomic_t got_fatal;
1.112 espie 137:
1.124 espie 138: static volatile sig_atomic_t got_SIGINT, got_SIGHUP, got_SIGQUIT, got_SIGTERM,
1.128 espie 139: got_SIGINFO;
1.112 espie 140:
1.124 espie 141: static sigset_t sigset, emptyset;
1.112 espie 142:
1.126 espie 143: static void handle_fatal_signal(int);
1.124 espie 144: static void handle_siginfo(void);
1.142 espie 145: static void postprocess_job(Job *);
1.124 espie 146: static void determine_job_next_step(Job *);
147: static void may_continue_job(Job *);
148: static Job *reap_finished_job(pid_t);
149: static bool reap_jobs(void);
1.146 espie 150: static void may_continue_heldback_jobs();
1.112 espie 151:
1.124 espie 152: static bool expensive_job(Job *);
153: static bool expensive_command(const char *);
154: static void setup_signal(int);
155: static void notice_signal(int);
156: static void setup_all_signals(void);
1.128 espie 157: static const char *really_kill(Job *, int);
158: static void debug_kill_printf(const char *, ...);
159: static void debug_vprintf(const char *, va_list);
160: static void may_remove_target(Job *);
1.131 espie 161: static void print_error(Job *);
162: static void internal_print_errors(void);
163:
164: static int dying_signal = 0;
165:
166: const char * basedirectory = NULL;
1.127 espie 167:
1.128 espie 168: static const char *
169: really_kill(Job *job, int signo)
170: {
171: pid_t pid = job->pid;
172: if (getpgid(pid) != getpgrp()) {
173: if (killpg(pid, signo) == 0)
174: return "group got signal";
175: pid = -pid;
176: } else {
177: if (kill(pid, signo) == 0)
178: return "process got signal";
179: }
1.138 natano 180: if (errno == ESRCH)
1.128 espie 181: job->flags |= JOB_LOST;
1.138 natano 182: return strerror(errno);
1.128 espie 183: }
184:
185: static void
186: may_remove_target(Job *j)
187: {
1.131 espie 188: int dying = check_dying_signal();
189:
190: if (dying && !noExecute && !Targ_Precious(j->node)) {
1.128 espie 191: const char *file = Var(TARGET_INDEX, j->node);
192: int r = eunlink(file);
193:
194: if (DEBUG(JOB) && r == -1)
195: fprintf(stderr, " *** would unlink %s\n", file);
196: if (r != -1)
197: fprintf(stderr, " *** %s removed\n", file);
1.127 espie 198: }
199: }
1.126 espie 200:
1.131 espie 201: static void
202: buf_addcurdir(BUFFER *buf)
203: {
204: const char *v = Var_Value(".CURDIR");
205: if (basedirectory != NULL) {
206: size_t len = strlen(basedirectory);
207: if (strncmp(basedirectory, v, len) == 0 &&
208: v[len] == '/') {
209: v += len+1;
210: } else if (strcmp(basedirectory, v) == 0) {
211: Buf_AddString(buf, ".");
212: return;
213: }
214: }
215: Buf_AddString(buf, v);
216: }
217:
218: static const char *
219: shortened_curdir(void)
220: {
221: static BUFFER buf;
1.140 espie 222: static bool first = true;
1.131 espie 223: if (first) {
224: Buf_Init(&buf, 0);
225: buf_addcurdir(&buf);
226: first = false;
227: }
228: return Buf_Retrieve(&buf);
229: }
230:
231: static void
232: quick_error(Job *j, int signo, bool first)
233: {
234: if (first) {
235: fprintf(stderr, "*** Signal SIG%s", sys_signame[signo]);
236: fprintf(stderr, " in %s (", shortened_curdir());
237: } else
238: fprintf(stderr, " ");
239:
240: fprintf(stderr, "%s", j->node->name);
241: free(j->cmd);
242: }
243:
1.126 espie 244: static void
1.130 espie 245: print_error(Job *j)
1.126 espie 246: {
1.130 espie 247: static bool first = true;
1.131 espie 248: BUFFER buf;
249:
250: Buf_Init(&buf, 0);
1.126 espie 251:
1.131 espie 252: if (j->exit_type == JOB_EXIT_BAD)
253: Buf_printf(&buf, "*** Error %d", j->code);
254: else if (j->exit_type == JOB_SIGNALED) {
1.128 espie 255: if (j->code < NSIG)
1.131 espie 256: Buf_printf(&buf, "*** Signal SIG%s",
1.128 espie 257: sys_signame[j->code]);
258: else
1.131 espie 259: Buf_printf(&buf, "*** unknown signal %d", j->code);
1.128 espie 260: } else
1.131 espie 261: Buf_printf(&buf, "*** Should not happen %d/%d",
262: j->exit_type, j->code);
1.128 espie 263: if (DEBUG(KILL) && (j->flags & JOB_LOST))
1.131 espie 264: Buf_AddChar(&buf, '!');
1.130 espie 265: if (first) {
1.131 espie 266: Buf_AddString(&buf, " in ");
267: buf_addcurdir(&buf);
1.130 espie 268: first = false;
269: }
1.131 espie 270: Buf_printf(&buf, " (%s:%lu", j->location->fname, j->location->lineno);
271: Buf_printf(&buf, " '%s'", j->node->name);
272: if ((j->flags & (JOB_SILENT | JOB_IS_EXPENSIVE)) == JOB_SILENT
1.132 espie 273: && Buf_Size(&buf) < 140-2) {
1.131 espie 274: size_t len = strlen(j->cmd);
275: Buf_AddString(&buf, ": ");
276: if (len + Buf_Size(&buf) < 140)
277: Buf_AddString(&buf, j->cmd);
278: else {
279: Buf_AddChars(&buf, 140 - Buf_Size(&buf), j->cmd);
280: Buf_AddString(&buf, "...");
281: }
282: }
283: fprintf(stderr, "%s)\n", Buf_Retrieve(&buf));
284: Buf_Destroy(&buf);
1.126 espie 285: free(j->cmd);
1.131 espie 286: }
287: static void
288: quick_summary(int signo)
289: {
290: Job *j, *k, *jnext;
291: bool first = true;
292:
293: k = errorJobs;
294: errorJobs = NULL;
295: for (j = k; j != NULL; j = jnext) {
296: jnext = j->next;
297: if ((j->exit_type == JOB_EXIT_BAD && j->code == signo+128) ||
298: (j->exit_type == JOB_SIGNALED && j->code == signo)) {
299: quick_error(j, signo, first);
300: first = false;
301: } else {
302: j->next = errorJobs;
303: errorJobs = j;
304: }
305: }
306: if (!first)
307: fprintf(stderr, ")\n");
1.126 espie 308: }
1.93 espie 309:
1.131 espie 310: static void
311: internal_print_errors()
1.101 espie 312: {
1.126 espie 313: Job *j, *k, *jnext;
1.131 espie 314: int dying;
1.124 espie 315:
1.130 espie 316: if (!errorJobs)
1.133 espie 317: fprintf(stderr, "Stop in %s\n", shortened_curdir());
1.1 deraadt 318:
1.131 espie 319: for (j = errorJobs; j != NULL; j = j->next)
320: may_remove_target(j);
321: dying = check_dying_signal();
322: if (dying)
323: quick_summary(dying);
1.143 espie 324: /* Print errors grouped by file name. */
1.126 espie 325: while (errorJobs != NULL) {
1.143 espie 326: /* Select the first job. */
1.126 espie 327: k = errorJobs;
328: errorJobs = NULL;
329: for (j = k; j != NULL; j = jnext) {
330: jnext = j->next;
331: if (j->location->fname == k->location->fname)
1.143 espie 332: /* Print errors with the same filename. */
1.130 espie 333: print_error(j);
1.126 espie 334: else {
1.143 espie 335: /* Keep others for the next iteration. */
1.126 espie 336: j->next = errorJobs;
337: errorJobs = j;
338: }
339: }
1.101 espie 340: }
1.88 espie 341: }
342:
1.131 espie 343: void
344: print_errors(void)
345: {
346: handle_all_signals();
347: internal_print_errors();
348: }
349:
1.57 espie 350: static void
1.124 espie 351: setup_signal(int sig)
1.57 espie 352: {
1.124 espie 353: if (signal(sig, SIG_IGN) != SIG_IGN) {
354: (void)signal(sig, notice_signal);
355: sigaddset(&sigset, sig);
1.57 espie 356: }
357: }
358:
359: static void
1.124 espie 360: notice_signal(int sig)
1.1 deraadt 361: {
1.126 espie 362:
1.124 espie 363: switch(sig) {
1.117 espie 364: case SIGINT:
365: got_SIGINT++;
1.124 espie 366: got_fatal = 1;
367: break;
1.117 espie 368: case SIGHUP:
369: got_SIGHUP++;
1.124 espie 370: got_fatal = 1;
371: break;
1.117 espie 372: case SIGQUIT:
373: got_SIGQUIT++;
1.124 espie 374: got_fatal = 1;
375: break;
1.117 espie 376: case SIGTERM:
377: got_SIGTERM++;
1.124 espie 378: got_fatal = 1;
1.117 espie 379: break;
1.124 espie 380: case SIGINFO:
381: got_SIGINFO++;
1.117 espie 382: break;
1.124 espie 383: case SIGCHLD:
1.117 espie 384: break;
1.66 espie 385: }
1.124 espie 386: }
1.117 espie 387:
1.135 espie 388: static void
1.124 espie 389: setup_all_signals(void)
390: {
391: sigemptyset(&sigset);
392: sigemptyset(&emptyset);
393: /*
394: * Catch the four signals that POSIX specifies if they aren't ignored.
395: * handle_signal will take care of calling JobInterrupt if appropriate.
396: */
397: setup_signal(SIGINT);
398: setup_signal(SIGHUP);
399: setup_signal(SIGQUIT);
400: setup_signal(SIGTERM);
401: /* Display running jobs on SIGINFO */
402: setup_signal(SIGINFO);
403: /* Have to see SIGCHLD */
404: setup_signal(SIGCHLD);
405: got_fatal = 0;
1.1 deraadt 406: }
407:
1.124 espie 408: static void
409: handle_siginfo(void)
1.1 deraadt 410: {
1.126 espie 411: static BUFFER buf;
412: static size_t length = 0;
413:
1.124 espie 414: Job *job;
415: bool first = true;
1.66 espie 416:
1.124 espie 417: got_SIGINFO = 0;
418: /* we have to store the info in a buffer, because status from all
419: * makes running would get intermixed otherwise
1.66 espie 420: */
1.124 espie 421:
1.126 espie 422: if (length == 0) {
423: Buf_Init(&buf, 0);
1.131 espie 424: Buf_printf(&buf, "%s in ", Var_Value("MAKE"));
425: buf_addcurdir(&buf);
426: Buf_AddString(&buf, ": ");
1.126 espie 427: length = Buf_Size(&buf);
428: } else
429: Buf_Truncate(&buf, length);
1.124 espie 430:
431: for (job = runningJobs; job != NULL ; job = job->next) {
432: if (!first)
433: Buf_puts(&buf, ", ");
434: first = false;
435: Buf_puts(&buf, job->node->name);
436: }
437: Buf_puts(&buf, first ? "nothing running\n" : "\n");
1.1 deraadt 438:
1.124 espie 439: fputs(Buf_Retrieve(&buf), stderr);
1.1 deraadt 440: }
441:
1.131 espie 442: int
443: check_dying_signal(void)
444: {
445: sigset_t set;
446: if (dying_signal)
447: return dying_signal;
448: sigpending(&set);
449: if (got_SIGINT || sigismember(&set, SIGINT))
450: return dying_signal = SIGINT;
451: if (got_SIGHUP || sigismember(&set, SIGHUP))
452: return dying_signal = SIGHUP;
453: if (got_SIGQUIT || sigismember(&set, SIGQUIT))
454: return dying_signal = SIGQUIT;
455: if (got_SIGTERM || sigismember(&set, SIGTERM))
456: return dying_signal = SIGTERM;
457: return 0;
458: }
459:
1.124 espie 460: void
461: handle_all_signals(void)
1.1 deraadt 462: {
1.124 espie 463: if (got_SIGINFO)
464: handle_siginfo();
465: while (got_fatal) {
466: got_fatal = 0;
467: aborting = ABORT_INTERRUPT;
468:
469: if (got_SIGINT) {
470: got_SIGINT=0;
1.126 espie 471: handle_fatal_signal(SIGINT);
1.124 espie 472: }
473: if (got_SIGHUP) {
474: got_SIGHUP=0;
1.126 espie 475: handle_fatal_signal(SIGHUP);
1.124 espie 476: }
477: if (got_SIGQUIT) {
478: got_SIGQUIT=0;
1.126 espie 479: handle_fatal_signal(SIGQUIT);
1.124 espie 480: }
481: if (got_SIGTERM) {
482: got_SIGTERM=0;
1.126 espie 483: handle_fatal_signal(SIGTERM);
1.124 espie 484: }
485: }
1.1 deraadt 486: }
487:
1.128 espie 488: static void
489: debug_vprintf(const char *fmt, va_list va)
490: {
491: (void)printf("[%ld] ", (long)mypid);
492: (void)vprintf(fmt, va);
493: fflush(stdout);
494: }
495:
1.124 espie 496: void
497: debug_job_printf(const char *fmt, ...)
1.84 espie 498: {
499: if (DEBUG(JOB)) {
500: va_list va;
501: va_start(va, fmt);
1.128 espie 502: debug_vprintf(fmt, va);
503: va_end(va);
504: }
505: }
506:
507: static void
508: debug_kill_printf(const char *fmt, ...)
509: {
510: if (DEBUG(KILL)) {
511: va_list va;
512: va_start(va, fmt);
513: debug_vprintf(fmt, va);
1.84 espie 514: va_end(va);
515: }
516: }
1.119 espie 517:
1.1 deraadt 518: /*-
519: *-----------------------------------------------------------------------
1.124 espie 520: * postprocess_job --
521: * Do final processing for the given job including updating
1.119 espie 522: * parents and starting new jobs as available/necessary.
1.1 deraadt 523: *
524: * Side Effects:
1.6 millert 525: * If we got an error and are aborting (aborting == ABORT_ERROR) and
1.1 deraadt 526: * the job list is now empty, we are done for the day.
1.101 espie 527: * If we recognized an error we set the aborting flag
1.1 deraadt 528: * to ABORT_ERROR so no more jobs will be started.
529: *-----------------------------------------------------------------------
530: */
531: /*ARGSUSED*/
1.112 espie 532:
1.1 deraadt 533: static void
1.142 espie 534: postprocess_job(Job *job)
1.2 deraadt 535: {
1.142 espie 536: if (job->exit_type == JOB_EXIT_OKAY &&
1.66 espie 537: aborting != ABORT_ERROR &&
1.124 espie 538: aborting != ABORT_INTERRUPT) {
1.66 espie 539: /* As long as we aren't aborting and the job didn't return a
540: * non-zero status that we shouldn't ignore, we call
1.101 espie 541: * Make_Update to update the parents. */
1.141 espie 542: job->node->built_status = REBUILT;
1.153 espie 543: if (!compatMode)
544: Make_Update(job->node);
1.152 espie 545: }
546: if (job->flags & JOB_KEEPERROR) {
547: job->next = errorJobs;
548: errorJobs = job;
549: } else {
1.148 espie 550: job->next = availableJobs;
551: availableJobs = job;
552: }
1.1 deraadt 553:
1.145 espie 554: if (errorJobs != NULL && aborting != ABORT_INTERRUPT)
1.66 espie 555: aborting = ABORT_ERROR;
1.6 millert 556:
1.124 espie 557: if (aborting == ABORT_ERROR && DEBUG(QUICKDEATH))
1.126 espie 558: handle_fatal_signal(SIGINT);
1.117 espie 559: if (aborting == ABORT_ERROR && Job_Empty())
1.124 espie 560: Finish();
1.1 deraadt 561: }
562:
1.124 espie 563: /* expensive jobs handling: in order to avoid forking an exponential number
564: * of jobs, make tries to figure out "recursive make" configurations.
565: * It may err on the side of caution.
566: * Basically, a command is "expensive" if it's likely to fork an extra
567: * level of make: either by looking at the command proper, or if it has
568: * some specific qualities ('+cmd' are likely to be recursive, as are
569: * .MAKE: commands). It's possible to explicitly say some targets are
570: * expensive or cheap with .EXPENSIVE or .CHEAP.
571: *
572: * While an expensive command is running, no_new_jobs
573: * is set, so jobs that would fork new processes are accumulated in the
574: * heldJobs list instead.
575: *
1.147 espie 576: * XXX This heuristics is also used on error exit: we display silent commands
577: * that failed, unless those ARE expensive commands: expensive commands are
578: * likely to not be failing by themselves, but to be the result of a cascade of
579: * failures in descendant makes.
1.124 espie 580: */
581: void
582: determine_expensive_job(Job *job)
583: {
584: if (expensive_job(job)) {
585: job->flags |= JOB_IS_EXPENSIVE;
586: no_new_jobs = true;
587: } else
588: job->flags &= ~JOB_IS_EXPENSIVE;
589: if (DEBUG(EXPENSIVE))
590: fprintf(stderr, "[%ld] Target %s running %.50s: %s\n",
591: (long)mypid, job->node->name, job->cmd,
592: job->flags & JOB_IS_EXPENSIVE ? "expensive" : "cheap");
1.101 espie 593: }
594:
1.124 espie 595: static bool
596: expensive_job(Job *job)
1.1 deraadt 597: {
1.124 espie 598: if (job->node->type & OP_CHEAP)
599: return false;
600: if (job->node->type & (OP_EXPENSIVE | OP_MAKE))
601: return true;
602: return expensive_command(job->cmd);
1.96 espie 603: }
604:
1.117 espie 605: static bool
606: expensive_command(const char *s)
1.1 deraadt 607: {
1.117 espie 608: const char *p;
609: bool include = false;
610: bool expensive = false;
1.66 espie 611:
1.117 espie 612: /* okay, comments are cheap, always */
613: if (*s == '#')
614: return false;
1.124 espie 615: /* and commands we always execute are expensive */
616: if (*s == '+')
617: return true;
1.66 espie 618:
1.117 espie 619: for (p = s; *p != '\0'; p++) {
620: if (*p == ' ' || *p == '\t') {
621: include = false;
622: if (p[1] == '-' && p[2] == 'I')
623: include = true;
624: }
625: if (include)
626: continue;
627: /* KMP variant, avoid looking twice at the same
628: * letter.
629: */
630: if (*p != 'm')
631: continue;
632: if (p[1] != 'a')
633: continue;
634: p++;
635: if (p[1] != 'k')
636: continue;
637: p++;
638: if (p[1] != 'e')
639: continue;
640: p++;
641: expensive = true;
642: while (p[1] != '\0' && p[1] != ' ' && p[1] != '\t') {
1.124 espie 643: if (p[1] == '.' || p[1] == '/') {
1.117 espie 644: expensive = false;
645: break;
1.66 espie 646: }
1.117 espie 647: p++;
1.1 deraadt 648: }
1.117 espie 649: if (expensive)
650: return true;
1.1 deraadt 651: }
1.117 espie 652: return false;
653: }
654:
1.124 espie 655: static void
656: may_continue_job(Job *job)
657: {
658: if (no_new_jobs) {
659: if (DEBUG(EXPENSIVE))
660: fprintf(stderr, "[%ld] expensive -> hold %s\n",
661: (long)mypid, job->node->name);
662: job->next = heldJobs;
663: heldJobs = job;
1.151 espie 664: } else {
665: bool finished = job_run_next(job);
666: if (finished)
667: postprocess_job(job);
668: else if (!sequential)
669: determine_expensive_job(job);
670: }
1.98 espie 671: }
1.1 deraadt 672:
1.98 espie 673: /*-
674: *-----------------------------------------------------------------------
1.124 espie 675: * Job_Make --
1.98 espie 676: * Start a target-creation process going for the target described
677: * by the graph node gn.
678: *
679: * Side Effects:
1.124 espie 680: * A new Job node is created and its commands continued, which
681: * may fork the first command of that job.
1.98 espie 682: *-----------------------------------------------------------------------
683: */
1.124 espie 684: void
685: Job_Make(GNode *gn)
1.98 espie 686: {
1.154 ! espie 687: Job *job = availableJobs;
1.124 espie 688:
1.154 ! espie 689: assert(job != NULL);
! 690: availableJobs = availableJobs->next;
! 691: job_attach_node(job, gn);
1.124 espie 692: may_continue_job(job);
1.1 deraadt 693: }
694:
1.101 espie 695: static void
1.124 espie 696: determine_job_next_step(Job *job)
1.2 deraadt 697: {
1.124 espie 698: if (job->flags & JOB_IS_EXPENSIVE) {
699: no_new_jobs = false;
700: if (DEBUG(EXPENSIVE))
701: fprintf(stderr, "[%ld] "
702: "Returning from expensive target %s, "
703: "allowing new jobs\n", (long)mypid,
704: job->node->name);
705: }
1.2 deraadt 706:
1.142 espie 707: if (job->exit_type != JOB_EXIT_OKAY || job->next_cmd == NULL)
1.150 espie 708: postprocess_job(job);
1.124 espie 709: else
710: may_continue_job(job);
1.101 espie 711: }
712:
713: static void
1.142 espie 714: remove_job(Job *job)
1.101 espie 715: {
1.142 espie 716: postprocess_job(job);
1.146 espie 717: }
718:
719: static void
720: may_continue_heldback_jobs()
721: {
1.124 espie 722: while (!no_new_jobs) {
723: if (heldJobs != NULL) {
1.146 espie 724: Job *job = heldJobs;
1.124 espie 725: heldJobs = heldJobs->next;
726: if (DEBUG(EXPENSIVE))
727: fprintf(stderr, "[%ld] cheap -> release %s\n",
728: (long)mypid, job->node->name);
1.151 espie 729: may_continue_job(job);
1.124 espie 730: } else
731: break;
1.2 deraadt 732: }
733: }
1.111 espie 734:
1.124 espie 735: /*
736: * job = reap_finished_job(pid):
737: * retrieve and remove a job from runningJobs, based on its pid
1.1 deraadt 738: *
1.124 espie 739: * Note that we remove it right away, so that handle_signals()
740: * is accurate.
1.1 deraadt 741: */
1.124 espie 742: static Job *
743: reap_finished_job(pid_t pid)
1.66 espie 744: {
1.124 espie 745: Job **j, *job;
1.1 deraadt 746:
1.124 espie 747: for (j = &runningJobs; *j != NULL; j = &((*j)->next))
748: if ((*j)->pid == pid) {
749: job = *j;
750: *j = job->next;
751: return job;
1.66 espie 752: }
1.1 deraadt 753:
1.124 espie 754: return NULL;
1.101 espie 755: }
1.6 millert 756:
1.124 espie 757: /*
758: * classic waitpid handler: retrieve as many dead children as possible.
759: * returns true if succesful
760: */
761: static bool
762: reap_jobs(void)
1.117 espie 763: {
1.124 espie 764: pid_t pid; /* pid of dead child */
765: int status; /* Exit/termination status */
766: bool reaped = false;
1.117 espie 767: Job *job;
768:
769: while ((pid = waitpid(WAIT_ANY, &status, WNOHANG)) > 0) {
1.124 espie 770: reaped = true;
771: job = reap_finished_job(pid);
1.1 deraadt 772:
1.124 espie 773: if (job == NULL) {
774: Punt("Child (%ld) not in table?", (long)pid);
1.66 espie 775: } else {
1.149 espie 776: handle_job_status(job, status);
1.124 espie 777: determine_job_next_step(job);
1.1 deraadt 778: }
1.146 espie 779: may_continue_heldback_jobs();
1.1 deraadt 780: }
1.124 espie 781: /* sanity check, should not happen */
782: if (pid == -1 && errno == ECHILD && runningJobs != NULL)
783: Punt("Process has no children, but runningJobs is not empty ?");
784: return reaped;
1.1 deraadt 785: }
786:
787: void
1.124 espie 788: handle_running_jobs(void)
1.1 deraadt 789: {
1.124 espie 790: sigset_t old;
791: /* reaping children in the presence of caught signals */
1.91 espie 792:
1.124 espie 793: /* first, we make sure to hold on new signals, to synchronize
794: * reception of new stuff on sigsuspend
795: */
796: sigprocmask(SIG_BLOCK, &sigset, &old);
1.135 espie 797: /* note this will NOT loop until runningJobs == NULL.
798: * It's merely an optimisation, namely that we don't need to go
799: * through the logic if no job is present. As soon as a job
800: * gets reaped, we WILL exit the loop through the break.
801: */
1.124 espie 802: while (runningJobs != NULL) {
803: /* did we already have pending stuff that advances things ?
804: * then handle_all_signals() will not return
805: * or reap_jobs() will reap_jobs()
806: */
807: handle_all_signals();
808: if (reap_jobs())
809: break;
810: /* okay, so it's safe to suspend, we have nothing to do but
811: * wait...
812: */
813: sigsuspend(&emptyset);
1.1 deraadt 814: }
1.124 espie 815: sigprocmask(SIG_SETMASK, &old, NULL);
1.1 deraadt 816: }
817:
1.111 espie 818: void
819: loop_handle_running_jobs()
820: {
1.124 espie 821: while (runningJobs != NULL)
1.111 espie 822: handle_running_jobs();
823: }
1.1 deraadt 824:
825: void
1.153 espie 826: Job_Init(int maxJobs, bool compat)
1.1 deraadt 827: {
1.148 espie 828: Job *j;
829: int i;
830:
1.124 espie 831: runningJobs = NULL;
832: heldJobs = NULL;
833: errorJobs = NULL;
1.148 espie 834: availableJobs = NULL;
835: sequential = maxJobs == 1;
1.153 espie 836: compatMode = compat;
1.148 espie 837:
838: /* we allocate n+1 jobs, since we may need an extra job for
839: * running .INTERRUPT. */
840: j = ereallocarray(NULL, sizeof(Job), maxJobs+1);
841: for (i = 0; i != maxJobs; i++) {
842: j[i].next = availableJobs;
843: availableJobs = &j[i];
844: }
845: extra_job = &j[maxJobs];
1.124 espie 846: mypid = getpid();
847:
1.117 espie 848: aborting = 0;
1.124 espie 849: setup_all_signals();
1.1 deraadt 850: }
851:
1.41 espie 852: bool
1.117 espie 853: can_start_job(void)
1.1 deraadt 854: {
1.148 espie 855: if (aborting || availableJobs == NULL)
1.117 espie 856: return false;
1.119 espie 857: else
1.117 espie 858: return true;
1.1 deraadt 859: }
860:
1.41 espie 861: bool
1.56 espie 862: Job_Empty(void)
1.1 deraadt 863: {
1.124 espie 864: return runningJobs == NULL;
1.1 deraadt 865: }
866:
867: /*-
868: *-----------------------------------------------------------------------
1.126 espie 869: * handle_fatal_signal --
870: * Handle the receipt of a fatal interrupt
1.1 deraadt 871: *
872: * Side Effects:
1.126 espie 873: * All children are killed. Another job may be started if there
874: * is an interrupt target and the signal was SIGINT.
1.1 deraadt 875: *-----------------------------------------------------------------------
876: */
877: static void
1.126 espie 878: handle_fatal_signal(int signo)
1.1 deraadt 879: {
1.124 espie 880: Job *job;
1.66 espie 881:
1.128 espie 882: debug_kill_printf("handle_fatal_signal(%d) called.\n", signo);
1.66 espie 883:
1.131 espie 884: dying_signal = signo;
1.124 espie 885: for (job = runningJobs; job != NULL; job = job->next) {
1.128 espie 886: debug_kill_printf("passing to "
887: "child %ld running %s: %s\n", (long)job->pid,
888: job->node->name, really_kill(job, signo));
889: may_remove_target(job);
1.2 deraadt 890: }
1.1 deraadt 891:
1.124 espie 892: if (signo == SIGINT && !touchFlag) {
1.78 espie 893: if ((interrupt_node->type & OP_DUMMY) == 0) {
1.66 espie 894: ignoreErrors = false;
1.148 espie 895: extra_job->next = availableJobs;
896: availableJobs = extra_job;
1.124 espie 897: Job_Make(interrupt_node);
1.66 espie 898: }
1.1 deraadt 899: }
1.124 espie 900: loop_handle_running_jobs();
1.131 espie 901: internal_print_errors();
1.124 espie 902:
903: /* die by that signal */
904: sigprocmask(SIG_BLOCK, &sigset, NULL);
905: signal(signo, SIG_DFL);
1.126 espie 906: kill(getpid(), signo);
1.124 espie 907: sigprocmask(SIG_SETMASK, &emptyset, NULL);
908: /*NOTREACHED*/
1.131 espie 909: fprintf(stderr, "This should never happen\n");
910: exit(1);
1.1 deraadt 911: }
912:
913: /*
914: *-----------------------------------------------------------------------
1.12 espie 915: * Job_Finish --
1.1 deraadt 916: * Do final processing such as the running of the commands
1.6 millert 917: * attached to the .END target.
1.1 deraadt 918: *
1.124 espie 919: * return true if fatal errors have happened.
1.1 deraadt 920: *-----------------------------------------------------------------------
921: */
1.124 espie 922: bool
1.56 espie 923: Job_Finish(void)
1.1 deraadt 924: {
1.134 espie 925: bool problem = errorJobs != NULL;
1.124 espie 926:
1.116 espie 927: if ((end_node->type & OP_DUMMY) == 0) {
1.134 espie 928: if (problem) {
1.66 espie 929: Error("Errors reported so .END ignored");
930: } else {
1.124 espie 931: Job_Make(end_node);
1.111 espie 932: loop_handle_running_jobs();
1.66 espie 933: }
1.1 deraadt 934: }
1.134 espie 935: return problem;
1.1 deraadt 936: }
937:
1.124 espie 938: void
939: Job_Begin(void)
940: {
941: if ((begin_node->type & OP_DUMMY) == 0) {
942: Job_Make(begin_node);
943: loop_handle_running_jobs();
944: }
945: }
946:
1.1 deraadt 947: /*-
948: *-----------------------------------------------------------------------
949: * Job_Wait --
950: * Waits for all running jobs to finish and returns. Sets 'aborting'
951: * to ABORT_WAIT to prevent other jobs from starting.
952: *
953: * Side Effects:
954: * Currently running jobs finish.
955: *
956: *-----------------------------------------------------------------------
957: */
958: void
1.56 espie 959: Job_Wait(void)
1.1 deraadt 960: {
1.66 espie 961: aborting = ABORT_WAIT;
1.111 espie 962: loop_handle_running_jobs();
1.66 espie 963: aborting = 0;
1.1 deraadt 964: }
965:
966: /*-
967: *-----------------------------------------------------------------------
968: * Job_AbortAll --
969: * Abort all currently running jobs without handling output or anything.
970: * This function is to be called only in the event of a major
1.124 espie 971: * error.
1.1 deraadt 972: *
973: * Side Effects:
1.124 espie 974: * All children are killed
1.1 deraadt 975: *-----------------------------------------------------------------------
976: */
977: void
1.56 espie 978: Job_AbortAll(void)
1.1 deraadt 979: {
1.66 espie 980: Job *job; /* the job descriptor in that element */
981: int foo;
1.6 millert 982:
1.66 espie 983: aborting = ABORT_ERROR;
1.6 millert 984:
1.124 espie 985: for (job = runningJobs; job != NULL; job = job->next) {
1.126 espie 986: killpg(job->pid, SIGINT);
987: killpg(job->pid, SIGKILL);
1.1 deraadt 988: }
1.6 millert 989:
1.66 espie 990: /*
991: * Catch as many children as want to report in at first, then give up
992: */
1.117 espie 993: while (waitpid(WAIT_ANY, &foo, WNOHANG) > 0)
1.66 espie 994: continue;
1.2 deraadt 995: }
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