Mercurial > hg > nginx
annotate auto/feature @ 3293:8abb88374c6c
Fix a bug introduced in r2032: After a child process has read a terminate
message from a channel, the process tries to read the channel again.
The kernel (at least FreeBSD) may preempt the process and sends a SIGIO
signal to a master process. The master process sends a new terminate message,
the kernel switches again to the the child process, and the child process
reads the messages instead of an EAGAIN error. And this may repeat over
and over. Being that the child process can not exit the cycle and test
the termination flag set by the message handler.
The fix disallow the master process to send a new terminate message on
SIGIO signal reception. It may send the message only on SIGALARM signal.
| author | Igor Sysoev <igor@sysoev.ru> |
|---|---|
| date | Wed, 04 Nov 2009 19:41:08 +0000 |
| parents | dad4423ef56a |
| children | 568a854383f9 |
| rev | line source |
|---|---|
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1 |
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2 # Copyright (C) Igor Sysoev |
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3 |
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4 |
| 455 | 5 echo $ngx_n "checking for $ngx_feature ...$ngx_c" |
| 6 | |
| 7 cat << END >> $NGX_AUTOCONF_ERR | |
| 8 | |
| 9 ---------------------------------------- | |
| 10 checking for $ngx_feature | |
| 11 | |
| 12 END | |
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13 |
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14 ngx_found=no |
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15 |
| 455 | 16 if test -n "$ngx_feature_name"; then |
| 645 | 17 ngx_have_feature=`echo $ngx_feature_name \ |
| 18 | tr abcdefghijklmnopqrstuvwxyz ABCDEFGHIJKLMNOPQRSTUVWXYZ` | |
| 455 | 19 fi |
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20 |
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21 if test -n "$ngx_feature_path"; then |
| 2139 | 22 for ngx_temp in $ngx_feature_path; do |
| 23 ngx_feature_inc_path="$ngx_feature_inc_path -I $ngx_temp" | |
| 24 done | |
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25 fi |
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26 |
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27 cat << END > $NGX_AUTOTEST.c |
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28 |
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29 #include <sys/types.h> |
| 455 | 30 $NGX_INCLUDE_UNISTD_H |
| 31 $ngx_feature_incs | |
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32 |
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33 int main() { |
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34 $ngx_feature_test; |
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35 return 0; |
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36 } |
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37 |
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38 END |
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39 |
| 455 | 40 |
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41 ngx_test="$CC $CC_TEST_FLAGS $CC_AUX_FLAGS $ngx_feature_inc_path \ |
| 455 | 42 -o $NGX_AUTOTEST $NGX_AUTOTEST.c $NGX_LD_OPT $ngx_feature_libs" |
| 461 | 43 |
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44 ngx_feature_inc_path= |
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45 |
| 946 | 46 eval "/bin/sh -c \"$ngx_test\" >> $NGX_AUTOCONF_ERR 2>&1" |
| 455 | 47 |
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48 |
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49 if [ -x $NGX_AUTOTEST ]; then |
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50 |
| 619 | 51 case "$ngx_feature_run" in |
| 52 | |
| 53 yes) | |
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54 # /bin/sh is used to intercept "Killed" or "Abort trap" messages |
| 705 | 55 if /bin/sh -c $NGX_AUTOTEST >/dev/null 2>&1; then |
| 619 | 56 echo " found" |
| 57 ngx_found=yes | |
| 455 | 58 |
| 619 | 59 if test -n "$ngx_feature_name"; then |
| 60 have=$ngx_have_feature . auto/have | |
| 61 fi | |
| 455 | 62 |
| 619 | 63 else |
| 64 echo " found but is not working" | |
| 65 fi | |
| 66 ;; | |
| 67 | |
| 68 bug) | |
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69 # /bin/sh is used to intercept "Killed" or "Abort trap" messages |
| 705 | 70 if /bin/sh -c $NGX_AUTOTEST >/dev/null 2>&1; then |
| 619 | 71 echo " not found" |
| 455 | 72 |
| 619 | 73 else |
| 74 echo " found" | |
| 75 ngx_found=yes | |
| 76 | |
| 77 if test -n "$ngx_feature_name"; then | |
| 78 have=$ngx_have_feature . auto/have | |
| 79 fi | |
| 80 fi | |
| 81 ;; | |
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82 |
| 619 | 83 *) |
| 84 echo " found" | |
| 85 ngx_found=yes | |
| 455 | 86 |
| 619 | 87 if test -n "$ngx_feature_name"; then |
| 88 have=$ngx_have_feature . auto/have | |
| 89 fi | |
| 90 ;; | |
| 455 | 91 |
| 619 | 92 esac |
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93 |
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94 else |
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95 echo " not found" |
| 455 | 96 |
| 97 echo "----------" >> $NGX_AUTOCONF_ERR | |
| 98 cat $NGX_AUTOTEST.c >> $NGX_AUTOCONF_ERR | |
| 99 echo "----------" >> $NGX_AUTOCONF_ERR | |
| 100 echo $ngx_test >> $NGX_AUTOCONF_ERR | |
| 101 echo "----------" >> $NGX_AUTOCONF_ERR | |
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102 fi |
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103 |
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104 rm $NGX_AUTOTEST* |