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Commitf98b847

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Use signals for postmaster death on FreeBSD.
Use FreeBSD 11.2's new support for detecting parent process death tomake PostmasterIsAlive() very cheap, as was done for Linux in anearlier commit.Author: Thomas MunroDiscussion:https://postgr.es/m/7261eb39-0369-f2f4-1bb5-62f3b6083b5e@iki.fi
1 parent9f09529 commitf98b847

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5 files changed

+14
-3
lines changed

5 files changed

+14
-3
lines changed

‎configure

Lines changed: 1 addition & 1 deletion
Original file line numberDiff line numberDiff line change
@@ -12494,7 +12494,7 @@ $as_echo "#define HAVE_STDBOOL_H 1" >>confdefs.h
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fi
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12497-
for ac_header in atomic.h crypt.h dld.h fp_class.h getopt.h ieeefp.h ifaddrs.h langinfo.h mbarrier.h poll.h sys/epoll.h sys/ipc.h sys/prctl.h sys/pstat.h sys/resource.h sys/select.h sys/sem.h sys/shm.h sys/sockio.h sys/tas.h sys/un.h termios.h ucred.h utime.h wchar.h wctype.h
12497+
for ac_header in atomic.h crypt.h dld.h fp_class.h getopt.h ieeefp.h ifaddrs.h langinfo.h mbarrier.h poll.h sys/epoll.h sys/ipc.h sys/prctl.h sys/procctl.h sys/pstat.h sys/resource.h sys/select.h sys/sem.h sys/shm.h sys/sockio.h sys/tas.h sys/un.h termios.h ucred.h utime.h wchar.h wctype.h
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do :
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as_ac_Header=`$as_echo "ac_cv_header_$ac_header" | $as_tr_sh`
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ac_fn_c_check_header_mongrel "$LINENO" "$ac_header" "$as_ac_Header" "$ac_includes_default"

‎configure.in

Lines changed: 1 addition & 1 deletion
Original file line numberDiff line numberDiff line change
@@ -1260,7 +1260,7 @@ AC_SUBST(UUID_LIBS)
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AC_HEADER_STDBOOL
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1263-
AC_CHECK_HEADERS([atomic.h crypt.h dld.h fp_class.h getopt.h ieeefp.h ifaddrs.h langinfo.h mbarrier.h poll.h sys/epoll.h sys/ipc.h sys/prctl.h sys/pstat.h sys/resource.h sys/select.h sys/sem.h sys/shm.h sys/sockio.h sys/tas.h sys/un.h termios.h ucred.h utime.h wchar.h wctype.h])
1263+
AC_CHECK_HEADERS([atomic.h crypt.h dld.h fp_class.h getopt.h ieeefp.h ifaddrs.h langinfo.h mbarrier.h poll.h sys/epoll.h sys/ipc.h sys/prctl.h sys/procctl.h sys/pstat.h sys/resource.h sys/select.h sys/sem.h sys/shm.h sys/sockio.h sys/tas.h sys/un.h termios.h ucred.h utime.h wchar.h wctype.h])
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# On BSD, test for net/if.h will fail unless sys/socket.h
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# is included first.

‎src/backend/storage/ipc/pmsignal.c

Lines changed: 3 additions & 0 deletions
Original file line numberDiff line numberDiff line change
@@ -379,6 +379,9 @@ PostmasterDeathSignalInit(void)
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#if defined(PR_SET_PDEATHSIG)
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if (prctl(PR_SET_PDEATHSIG,signum)<0)
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elog(ERROR,"could not request parent death signal: %m");
382+
#elif defined(PROC_PDEATHSIG_CTL)
383+
if (procctl(P_PID,0,PROC_PDEATHSIG_CTL,&signum)<0)
384+
elog(ERROR,"could not request parent death signal: %m");
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#else
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#error "USE_POSTMASTER_DEATH_SIGNAL set, but there is no mechanism to request the signal"
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#endif

‎src/include/pg_config.h.in

Lines changed: 3 additions & 0 deletions
Original file line numberDiff line numberDiff line change
@@ -603,6 +603,9 @@
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/* Define to 1 if you have the <sys/prctl.h> header file. */
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#undef HAVE_SYS_PRCTL_H
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/* Define to 1 if you have the <sys/procctl.h> header file. */
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#undef HAVE_SYS_PROCCTL_H
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/* Define to 1 if you have the <sys/pstat.h> header file. */
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#undef HAVE_SYS_PSTAT_H
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‎src/include/storage/pmsignal.h

Lines changed: 6 additions & 1 deletion
Original file line numberDiff line numberDiff line change
@@ -18,6 +18,10 @@
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#include"sys/prctl.h"
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#endif
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#ifdefHAVE_SYS_PROCCTL_H
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#include"sys/procctl.h"
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#endif
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/*
2226
* Reasons for signaling the postmaster. We can cope with simultaneous
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* signals for different reasons. If the same reason is signaled multiple
@@ -66,7 +70,8 @@ extern void PostmasterDeathSignalInit(void);
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* the parent dies. Checking the flag first makes PostmasterIsAlive() a lot
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* cheaper in usual case that the postmaster is alive.
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*/
69-
#if defined(HAVE_SYS_PRCTL_H)&& defined(PR_SET_PDEATHSIG)
73+
#if (defined(HAVE_SYS_PRCTL_H)&& defined(PR_SET_PDEATHSIG))|| \
74+
(defined(HAVE_SYS_PROCCTL_H)&& defined(PROC_PDEATHSIG_CTL))
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#defineUSE_POSTMASTER_DEATH_SIGNAL
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#endif
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