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First phase of memory management rewrite (see backend/utils/mmgr/README

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for details).  It doesn't really do that much yet, since there are no
short-term memory contexts in the executor, but the infrastructure is
in place and long-term contexts are handled reasonably.  A few long-
standing bugs have been fixed, such as 'VACUUM; anything' in a single
query string crashing.  Also, out-of-memory is now considered a
recoverable ERROR, not FATAL.
Eliminate a large amount of crufty, now-dead code in and around
memory management.
Fix problem with holding off SIGTRAP, SIGSEGV, etc in postmaster and
backend startup.
This commit is contained in:
Tom Lane
2000-06-28 03:33:33 +00:00
parent b601c8d882
commit 1aebc3618a
74 changed files with 2325 additions and 3296 deletions
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40
src/backend/bootstrap/bootstrap.c
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@ -8,7 +8,7 @@
* Portions Copyright (c) 1994, Regents of the University of California
*
* IDENTIFICATION
* $Header: /cvsroot/pgsql/src/backend/bootstrap/bootstrap.c,v 1.87 2000/06/22 22:31:17 petere Exp $
* $Header: /cvsroot/pgsql/src/backend/bootstrap/bootstrap.c,v 1.88 2000/06/28 03:31:09 tgl Exp $
*
*-------------------------------------------------------------------------
*/
@ -34,14 +34,14 @@
#include "miscadmin.h"
#include "tcop/tcopprot.h"
#include "utils/builtins.h"
#include "utils/exc.h"
#include "utils/fmgroids.h"
#include "utils/guc.h"
#include "utils/lsyscache.h"
#include "utils/portal.h"
#define ALLOC(t, c) ((t *) calloc((unsigned)(c), sizeof(t)))
extern void BaseInit(void);
extern void StartupXLOG(void);
extern void ShutdownXLOG(void);
extern void BootStrapXLOG(void);
@ -144,8 +144,8 @@ static Datum values[MAXATTR]; /* corresponding attribute values */
int numattr; /* number of attributes for cur. rel */
int DebugMode;
static GlobalMemory nogc = (GlobalMemory) NULL; /* special no-gc mem
* context */
static MemoryContext nogc = NULL; /* special no-gc mem context */
extern int optind;
extern char *optarg;
@ -240,6 +240,17 @@ BootstrapMain(int argc, char *argv[])
MyProcPid = getpid();
/*
* Fire up essential subsystems: error and memory management
*
* If we are running under the postmaster, this is done already.
*/
if (!IsUnderPostmaster)
{
EnableExceptionHandling(true);
MemoryContextInit();
}
/* ----------------
* process command arguments
* ----------------
@ -428,7 +439,6 @@ boot_openrel(char *relname)
if (Typ == (struct typmap **) NULL)
{
StartPortalAllocMode(DefaultAllocMode, 0);
rel = heap_openr(TypeRelationName, NoLock);
Assert(rel);
scan = heap_beginscan(rel, 0, SnapshotNow, 0, (ScanKey) NULL);
@ -445,13 +455,13 @@ boot_openrel(char *relname)
while (HeapTupleIsValid(tup = heap_getnext(scan, 0)))
{
(*app)->am_oid = tup->t_data->t_oid;
memmove((char *) &(*app++)->am_typ,
(char *) GETSTRUCT(tup),
sizeof((*app)->am_typ));
memcpy((char *) &(*app)->am_typ,
(char *) GETSTRUCT(tup),
sizeof((*app)->am_typ));
app++;
}
heap_endscan(scan);
heap_close(rel, NoLock);
EndPortalAllocMode();
}
if (reldesc != NULL)
@ -1088,10 +1098,14 @@ index_register(char *heap,
* them later.
*/
if (nogc == (GlobalMemory) NULL)
nogc = CreateGlobalMemory("BootstrapNoGC");
if (nogc == NULL)
nogc = AllocSetContextCreate((MemoryContext) NULL,
"BootstrapNoGC",
ALLOCSET_DEFAULT_MINSIZE,
ALLOCSET_DEFAULT_INITSIZE,
ALLOCSET_DEFAULT_MAXSIZE);
oldcxt = MemoryContextSwitchTo((MemoryContext) nogc);
oldcxt = MemoryContextSwitchTo(nogc);
newind = (IndexList *) palloc(sizeof(IndexList));
newind->il_heap = pstrdup(heap);