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-rw-r--r--src/backend/postmaster/pgstat.c10
-rw-r--r--src/backend/postmaster/postmaster.c60
-rw-r--r--src/backend/tcop/postgres.c2
-rw-r--r--src/backend/utils/init/globals.c1
-rw-r--r--src/backend/utils/init/miscinit.c16
-rw-r--r--src/include/libpq/libpq-be.h7
-rw-r--r--src/include/miscadmin.h2
-rw-r--r--src/include/postmaster/postmaster.h1
8 files changed, 37 insertions, 62 deletions
diff --git a/src/backend/postmaster/pgstat.c b/src/backend/postmaster/pgstat.c
index 8a5b2b3b420..8de603d1933 100644
--- a/src/backend/postmaster/pgstat.c
+++ b/src/backend/postmaster/pgstat.c
@@ -2784,21 +2784,13 @@ pgstat_initialize(void)
void
pgstat_bestart(void)
{
- TimestampTz proc_start_timestamp;
SockAddr clientaddr;
volatile PgBackendStatus *beentry;
/*
* To minimize the time spent modifying the PgBackendStatus entry, fetch
* all the needed data first.
- *
- * If we have a MyProcPort, use its session start time (for consistency,
- * and to save a kernel call).
*/
- if (MyProcPort)
- proc_start_timestamp = MyProcPort->SessionStartTime;
- else
- proc_start_timestamp = GetCurrentTimestamp();
/*
* We may not have a MyProcPort (eg, if this is the autovacuum process).
@@ -2883,7 +2875,7 @@ pgstat_bestart(void)
} while ((beentry->st_changecount & 1) == 0);
beentry->st_procpid = MyProcPid;
- beentry->st_proc_start_timestamp = proc_start_timestamp;
+ beentry->st_proc_start_timestamp = MyStartTimestamp;
beentry->st_activity_start_timestamp = 0;
beentry->st_state_start_timestamp = 0;
beentry->st_xact_start_timestamp = 0;
diff --git a/src/backend/postmaster/postmaster.c b/src/backend/postmaster/postmaster.c
index 41de140ae01..688f462e7d0 100644
--- a/src/backend/postmaster/postmaster.c
+++ b/src/backend/postmaster/postmaster.c
@@ -129,6 +129,7 @@
#include "utils/pidfile.h"
#include "utils/ps_status.h"
#include "utils/timeout.h"
+#include "utils/timestamp.h"
#include "utils/varlena.h"
#ifdef EXEC_BACKEND
@@ -581,9 +582,9 @@ PostmasterMain(int argc, char *argv[])
int i;
char *output_config_variable = NULL;
- MyProcPid = PostmasterPid = getpid();
+ InitProcessGlobals();
- MyStartTime = time(NULL);
+ PostmasterPid = MyProcPid;
IsPostmasterEnvironment = true;
@@ -598,16 +599,6 @@ PostmasterMain(int argc, char *argv[])
umask(PG_MODE_MASK_OWNER);
/*
- * Initialize random(3) so we don't get the same values in every run.
- *
- * Note: the seed is pretty predictable from externally-visible facts such
- * as postmaster start time, so avoid using random() for security-critical
- * random values during postmaster startup. At the time of first
- * connection, PostmasterRandom will select a hopefully-more-random seed.
- */
- srandom((unsigned int) (MyProcPid ^ MyStartTime));
-
- /*
* By default, palloc() requests in the postmaster will be allocated in
* the PostmasterContext, which is space that can be recycled by backends.
* Allocated data that needs to be available to backends should be
@@ -2514,6 +2505,32 @@ ClosePostmasterPorts(bool am_syslogger)
/*
+ * InitProcessGlobals -- set MyProcPid, MyStartTime[stamp], random seeds
+ *
+ * Called early in every backend.
+ */
+void
+InitProcessGlobals(void)
+{
+ MyProcPid = getpid();
+ MyStartTimestamp = GetCurrentTimestamp();
+ MyStartTime = timestamptz_to_time_t(MyStartTimestamp);
+
+ /*
+ * Don't want backend to be able to see the postmaster random number
+ * generator state. We have to clobber the static random_seed.
+ */
+#ifndef HAVE_STRONG_RANDOM
+ random_seed = 0;
+ random_start_time.tv_usec = 0;
+#endif
+
+ /* Set a different seed for random() in every backend. */
+ srandom((unsigned int) MyProcPid ^ (unsigned int) MyStartTimestamp);
+}
+
+
+/*
* reset_shared -- reset shared memory and semaphores
*/
static void
@@ -4154,10 +4171,6 @@ BackendInitialize(Port *port)
/* This flag will remain set until InitPostgres finishes authentication */
ClientAuthInProgress = true; /* limit visibility of log messages */
- /* save process start time */
- port->SessionStartTime = GetCurrentTimestamp();
- MyStartTime = timestamptz_to_time_t(port->SessionStartTime);
-
/* set these to empty in case they are needed before we set them up */
port->remote_host = "";
port->remote_port = "";
@@ -4315,24 +4328,9 @@ BackendRun(Port *port)
char **av;
int maxac;
int ac;
- long secs;
- int usecs;
int i;
/*
- * Don't want backend to be able to see the postmaster random number
- * generator state. We have to clobber the static random_seed *and* start
- * a new random sequence in the random() library function.
- */
-#ifndef HAVE_STRONG_RANDOM
- random_seed = 0;
- random_start_time.tv_usec = 0;
-#endif
- /* slightly hacky way to convert timestamptz into integers */
- TimestampDifference(0, port->SessionStartTime, &secs, &usecs);
- srandom((unsigned int) (MyProcPid ^ (usecs << 12) ^ secs));
-
- /*
* Now, build the argv vector that will be given to PostgresMain.
*
* The maximum possible number of commandline arguments that could come
diff --git a/src/backend/tcop/postgres.c b/src/backend/tcop/postgres.c
index e4c6e3d406e..6e13d14fcd0 100644
--- a/src/backend/tcop/postgres.c
+++ b/src/backend/tcop/postgres.c
@@ -4632,7 +4632,7 @@ log_disconnections(int code, Datum arg)
minutes,
seconds;
- TimestampDifference(port->SessionStartTime,
+ TimestampDifference(MyStartTimestamp,
GetCurrentTimestamp(),
&secs, &usecs);
msecs = usecs / 1000;
diff --git a/src/backend/utils/init/globals.c b/src/backend/utils/init/globals.c
index 5971310aabb..c6939779b98 100644
--- a/src/backend/utils/init/globals.c
+++ b/src/backend/utils/init/globals.c
@@ -39,6 +39,7 @@ volatile uint32 CritSectionCount = 0;
int MyProcPid;
pg_time_t MyStartTime;
+TimestampTz MyStartTimestamp;
struct Port *MyProcPort;
int32 MyCancelKey;
int MyPMChildSlot;
diff --git a/src/backend/utils/init/miscinit.c b/src/backend/utils/init/miscinit.c
index f590ecb25e8..238fe1deec8 100644
--- a/src/backend/utils/init/miscinit.c
+++ b/src/backend/utils/init/miscinit.c
@@ -274,9 +274,7 @@ InitPostmasterChild(void)
{
IsUnderPostmaster = true; /* we are a postmaster subprocess now */
- MyProcPid = getpid(); /* reset MyProcPid */
-
- MyStartTime = time(NULL); /* set our start time in case we call elog */
+ InitProcessGlobals();
/*
* make sure stderr is in binary mode before anything can possibly be
@@ -321,17 +319,7 @@ InitStandaloneProcess(const char *argv0)
{
Assert(!IsPostmasterEnvironment);
- MyProcPid = getpid(); /* reset MyProcPid */
-
- MyStartTime = time(NULL); /* set our start time in case we call elog */
-
- /*
- * Initialize random() for the first time, like PostmasterMain() would.
- * In a regular IsUnderPostmaster backend, BackendRun() computes a
- * high-entropy seed before any user query. Fewer distinct initial seeds
- * can occur here.
- */
- srandom((unsigned int) (MyProcPid ^ MyStartTime));
+ InitProcessGlobals();
/* Initialize process-local latch support */
InitializeLatchSupport();
diff --git a/src/include/libpq/libpq-be.h b/src/include/libpq/libpq-be.h
index eb8bba4ed88..b2c59df54e4 100644
--- a/src/include/libpq/libpq-be.h
+++ b/src/include/libpq/libpq-be.h
@@ -151,13 +151,6 @@ typedef struct Port
HbaLine *hba;
/*
- * Information that really has no business at all being in struct Port,
- * but since it gets used by elog.c in the same way as database_name and
- * other members of this struct, we may as well keep it here.
- */
- TimestampTz SessionStartTime; /* backend start time */
-
- /*
* TCP keepalive settings.
*
* default values are 0 if AF_UNIX or not yet known; current values are 0
diff --git a/src/include/miscadmin.h b/src/include/miscadmin.h
index 69f356f8cdb..d6b32c070c2 100644
--- a/src/include/miscadmin.h
+++ b/src/include/miscadmin.h
@@ -25,6 +25,7 @@
#include <signal.h>
+#include "datatype/timestamp.h" /* for TimestampTZ */
#include "pgtime.h" /* for pg_time_t */
@@ -163,6 +164,7 @@ extern PGDLLIMPORT int max_parallel_workers;
extern PGDLLIMPORT int MyProcPid;
extern PGDLLIMPORT pg_time_t MyStartTime;
+extern PGDLLIMPORT TimestampTz MyStartTimestamp;
extern PGDLLIMPORT struct Port *MyProcPort;
extern PGDLLIMPORT struct Latch *MyLatch;
extern int32 MyCancelKey;
diff --git a/src/include/postmaster/postmaster.h b/src/include/postmaster/postmaster.h
index 1877eef2391..a40d66e8906 100644
--- a/src/include/postmaster/postmaster.h
+++ b/src/include/postmaster/postmaster.h
@@ -48,6 +48,7 @@ extern PGDLLIMPORT const char *progname;
extern void PostmasterMain(int argc, char *argv[]) pg_attribute_noreturn();
extern void ClosePostmasterPorts(bool am_syslogger);
+extern void InitProcessGlobals(void);
extern int MaxLivePostmasterChildren(void);
generated by cgit v1.2.3 (git 2.25.1) at 2025-05-30 22:08:08 +0000