File: [local] / src / usr.bin / make / error.c (download)
Revision 1.22, Fri Sep 21 07:55:20 2012 UTC (11 years, 8 months ago) by espie
Branch: MAIN
Changes since 1.21: +12 -16 lines
major overhaul of the way make handle jobs, inspired by dpb:
instead of forking a "job" per target, and having that job further fork
separate commands, have make maintain a list of jobs, indexed by pid
of currently running commands, and handle process termination
continuation-style. This has lots of benefits:
- make is responsible for most printing, so we no longer need pipes nor
job control: make -j jobs see the tty.
- no more special-casing for jobs that don't really execute anything.
- unify code for make -jn and make -B, including signal handlers and
job waiting. So make -n, make -q, +cmd now run commands in the same
way in all cases.
- unified more accurate error-reporting, as make knows precisely which
command failed. Commands are tagged with their lines, and we display failing
commands in silent mode.
- fine-grained "expensive" command handling (recursion limiter). Do it
per-command instead of per-target.
Moreover, signal response is now simpler, as we just block the signals
in a small critical sections, test for events, and sigpause (thanks a lot
to guenther@ and millert@), so running make is now almost always paused
without any busy-waiting.
Thanks to everyone who tested and gave input.
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/* $OpenBSD: error.c,v 1.22 2012/09/21 07:55:20 espie Exp $ */
/*
* Copyright (c) 2001 Marc Espie.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE OPENBSD PROJECT AND CONTRIBUTORS
* ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE OPENBSD
* PROJECT OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#include <stdio.h>
#include <stdlib.h>
#include <stdarg.h>
#include <sys/types.h>
#include <unistd.h>
#include "config.h"
#include "defines.h"
#include "error.h"
#include "job.h"
#include "targ.h"
#include "var.h"
#ifndef LOCATION_TYPE
#include "location.h"
#endif
#include "lowparse.h"
int fatal_errors = 0;
static void ParseVErrorInternal(const Location *, int, const char *, va_list);
/*-
* Error --
* Print an error message given its format.
*/
/* VARARGS */
void
Error(char *fmt, ...)
{
va_list ap;
va_start(ap, fmt);
(void)vfprintf(stderr, fmt, ap);
va_end(ap);
(void)fprintf(stderr, "\n");
}
/*-
* Fatal --
* Produce a Fatal error message. If jobs are running, waits for them
* to finish.
*
* Side Effects:
* The program exits
*/
/* VARARGS */
void
Fatal(char *fmt, ...)
{
va_list ap;
Job_Wait();
va_start(ap, fmt);
(void)vfprintf(stderr, fmt, ap);
va_end(ap);
(void)fprintf(stderr, "\n");
if (DEBUG(GRAPH2))
Targ_PrintGraph(2);
exit(2); /* Not 1 so -q can distinguish error */
}
/*
* Punt --
* Major exception once jobs are being created. Kills all jobs, prints
* a message and exits.
*
* Side Effects:
* All children are killed indiscriminately and the program Lib_Exits
*/
/* VARARGS */
void
Punt(char *fmt, ...)
{
if (fmt) {
va_list ap;
va_start(ap, fmt);
(void)fprintf(stderr, "make: ");
(void)vfprintf(stderr, fmt, ap);
va_end(ap);
(void)fprintf(stderr, "\n");
}
Job_AbortAll();
if (DEBUG(GRAPH2))
Targ_PrintGraph(2);
exit(2); /* Not 1, so -q can distinguish error */
}
/*
* Finish --
* Called when aborting due to errors in command or fatal signal
*
* Side Effects:
* The program exits
*/
void
Finish()
{
Job_Wait();
print_errors();
if (DEBUG(GRAPH2))
Targ_PrintGraph(2);
exit(2); /* Not 1 so -q can distinguish error */
}
/*-
* ParseVErrorInternal --
* Error message abort function for parsing. Prints out the context
* of the error (line number and file) as well as the message with
* two optional arguments.
*
* Side Effects:
* "fatals" is incremented if the level is PARSE_FATAL.
*/
/* VARARGS */
static void
ParseVErrorInternal(const Location *origin, int type, const char *fmt,
va_list ap)
{
if (origin->fname)
(void)fprintf(stderr, "\"%s\", line %lu: ", origin->fname, origin->lineno);
if (type == PARSE_WARNING)
(void)fprintf(stderr, "warning: ");
(void)vfprintf(stderr, fmt, ap);
va_end(ap);
(void)fprintf(stderr, "\n");
if (type == PARSE_FATAL)
fatal_errors ++;
}
/*-
* Parse_Error --
* External interface to ParseVErrorInternal; uses the default filename
* Line number.
*/
/* VARARGS */
void
Parse_Error(int type, const char *fmt, ...)
{
va_list ap;
Location l;
va_start(ap, fmt);
Parse_FillLocation(&l);
ParseVErrorInternal(&l, type, fmt, ap);
va_end(ap);
}