From 839da50bd431587c1182b7d96e82853895961cd1 Mon Sep 17 00:00:00 2001 From: Noah Misch Date: Tue, 10 Dec 2024 13:51:59 -0800 Subject: [PATCH] Fix elog(FATAL) before PostmasterMain() or just after fork(). Since commit 97550c0711972a9856b5db751539bbaf2f88884c, these failed with "PANIC: proc_exit() called in child process" due to uninitialized or stale MyProcPid. That was reachable if close() failed in ClosePostmasterPorts() or setlocale(category, "C") failed, both unlikely. Back-patch to v13 (all supported versions). Discussion: https://postgr.es/m/20241208034614.45.nmisch@google.com --- src/backend/main/main.c | 2 ++ src/backend/postmaster/fork_process.c | 2 ++ src/backend/postmaster/postmaster.c | 3 +-- 3 files changed, 5 insertions(+), 2 deletions(-) diff --git a/src/backend/main/main.c b/src/backend/main/main.c index f8f7ebbd445..f243a8d793f 100644 --- a/src/backend/main/main.c +++ b/src/backend/main/main.c @@ -37,6 +37,7 @@ #include "bootstrap/bootstrap.h" #include "common/username.h" +#include "miscadmin.h" #include "port/atomics.h" #include "postmaster/postmaster.h" #include "storage/spin.h" @@ -99,6 +100,7 @@ main(int argc, char *argv[]) * localization of messages may not work right away, and messages won't go * anywhere but stderr until GUC settings get loaded. */ + MyProcPid = getpid(); MemoryContextInit(); /* diff --git a/src/backend/postmaster/fork_process.c b/src/backend/postmaster/fork_process.c index c75be03d2c3..bc1f95ec009 100644 --- a/src/backend/postmaster/fork_process.c +++ b/src/backend/postmaster/fork_process.c @@ -17,6 +17,7 @@ #include #include +#include "miscadmin.h" #include "postmaster/fork_process.h" #ifndef WIN32 @@ -60,6 +61,7 @@ fork_process(void) if (result == 0) { /* fork succeeded, in child */ + MyProcPid = getpid(); #ifdef LINUX_PROFILE setitimer(ITIMER_PROF, &prof_itimer, NULL); #endif diff --git a/src/backend/postmaster/postmaster.c b/src/backend/postmaster/postmaster.c index 918363c38bc..e0210d091e4 100644 --- a/src/backend/postmaster/postmaster.c +++ b/src/backend/postmaster/postmaster.c @@ -2690,14 +2690,13 @@ ClosePostmasterPorts(bool am_syslogger) /* - * InitProcessGlobals -- set MyProcPid, MyStartTime[stamp], random seeds + * InitProcessGlobals -- set MyStartTime[stamp], random seeds * * Called early in the postmaster and every backend. */ void InitProcessGlobals(void) { - MyProcPid = getpid(); MyStartTimestamp = GetCurrentTimestamp(); MyStartTime = timestamptz_to_time_t(MyStartTimestamp); -- 2.39.5