Move codes for pg_backend_memory_contexts from mmgr/mcxt.c to adt/mcxtfuncs.c.
Previously the codes for pg_backend_memory_contexts were in src/backend/utils/mmgr/mcxt.c. This commit moves them to src/backend/utils/adt/mcxtfuncs.c so that mcxt.c basically includes only the low-level interface for memory contexts. Author: Atsushi Torikoshi Reviewed-by: Michael Paquier, Fujii Masao Discussion: https://postgr.es/m/20200819135545.GC19121@paquier.xyz
This commit is contained in:
Fujii Masao
parent
29dd6d8bc6
commit
50db5964ee
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@ -57,6 +57,7 @@ OBJS = \
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lockfuncs.o \
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mac.o \
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mac8.o \
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mcxtfuncs.o \
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misc.o \
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name.o \
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network.o \
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@ -0,0 +1,157 @@
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/*-------------------------------------------------------------------------
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*
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* mcxtfuncs.c
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* Functions to show backend memory context.
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*
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* Portions Copyright (c) 1996-2020, PostgreSQL Global Development Group
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* Portions Copyright (c) 1994, Regents of the University of California
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*
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*
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* IDENTIFICATION
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* src/backend/utils/adt/mcxtfuncs.c
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*
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*-------------------------------------------------------------------------
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*/
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#include "postgres.h"
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#include "funcapi.h"
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#include "miscadmin.h"
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#include "mb/pg_wchar.h"
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#include "utils/builtins.h"
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/* ----------
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* The max bytes for showing identifiers of MemoryContext.
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* ----------
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*/
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#define MEMORY_CONTEXT_IDENT_DISPLAY_SIZE 1024
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/*
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* PutMemoryContextsStatsTupleStore
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* One recursion level for pg_get_backend_memory_contexts.
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*/
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static void
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PutMemoryContextsStatsTupleStore(Tuplestorestate *tupstore,
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TupleDesc tupdesc, MemoryContext context,
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const char *parent, int level)
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{
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#define PG_GET_BACKEND_MEMORY_CONTEXTS_COLS 9
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Datum values[PG_GET_BACKEND_MEMORY_CONTEXTS_COLS];
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bool nulls[PG_GET_BACKEND_MEMORY_CONTEXTS_COLS];
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MemoryContextCounters stat;
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MemoryContext child;
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const char *name;
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const char *ident;
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AssertArg(MemoryContextIsValid(context));
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name = context->name;
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ident = context->ident;
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/*
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* To be consistent with logging output, we label dynahash contexts
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* with just the hash table name as with MemoryContextStatsPrint().
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*/
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if (ident && strcmp(name, "dynahash") == 0)
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{
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name = ident;
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ident = NULL;
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}
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/* Examine the context itself */
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memset(&stat, 0, sizeof(stat));
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(*context->methods->stats) (context, NULL, (void *) &level, &stat);
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memset(values, 0, sizeof(values));
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memset(nulls, 0, sizeof(nulls));
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if (name)
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values[0] = CStringGetTextDatum(name);
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else
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nulls[0] = true;
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if (ident)
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{
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int idlen = strlen(ident);
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char clipped_ident[MEMORY_CONTEXT_IDENT_DISPLAY_SIZE];
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/*
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* Some identifiers such as SQL query string can be very long,
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* truncate oversize identifiers.
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*/
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if (idlen >= MEMORY_CONTEXT_IDENT_DISPLAY_SIZE)
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idlen = pg_mbcliplen(ident, idlen, MEMORY_CONTEXT_IDENT_DISPLAY_SIZE - 1);
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memcpy(clipped_ident, ident, idlen);
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clipped_ident[idlen] = '\0';
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values[1] = CStringGetTextDatum(clipped_ident);
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}
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else
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nulls[1] = true;
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if (parent)
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values[2] = CStringGetTextDatum(parent);
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else
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nulls[2] = true;
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values[3] = Int32GetDatum(level);
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values[4] = Int64GetDatum(stat.totalspace);
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values[5] = Int64GetDatum(stat.nblocks);
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values[6] = Int64GetDatum(stat.freespace);
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values[7] = Int64GetDatum(stat.freechunks);
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values[8] = Int64GetDatum(stat.totalspace - stat.freespace);
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tuplestore_putvalues(tupstore, tupdesc, values, nulls);
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for (child = context->firstchild; child != NULL; child = child->nextchild)
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{
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PutMemoryContextsStatsTupleStore(tupstore, tupdesc,
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child, name, level + 1);
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}
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}
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/*
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* pg_get_backend_memory_contexts
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* SQL SRF showing backend memory context.
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*/
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Datum
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pg_get_backend_memory_contexts(PG_FUNCTION_ARGS)
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{
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ReturnSetInfo *rsinfo = (ReturnSetInfo *) fcinfo->resultinfo;
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TupleDesc tupdesc;
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Tuplestorestate *tupstore;
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MemoryContext per_query_ctx;
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MemoryContext oldcontext;
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/* check to see if caller supports us returning a tuplestore */
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if (rsinfo == NULL || !IsA(rsinfo, ReturnSetInfo))
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ereport(ERROR,
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(errcode(ERRCODE_FEATURE_NOT_SUPPORTED),
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errmsg("set-valued function called in context that cannot accept a set")));
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if (!(rsinfo->allowedModes & SFRM_Materialize))
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ereport(ERROR,
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(errcode(ERRCODE_FEATURE_NOT_SUPPORTED),
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errmsg("materialize mode required, but it is not allowed in this context")));
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/* Build a tuple descriptor for our result type */
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if (get_call_result_type(fcinfo, NULL, &tupdesc) != TYPEFUNC_COMPOSITE)
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elog(ERROR, "return type must be a row type");
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per_query_ctx = rsinfo->econtext->ecxt_per_query_memory;
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oldcontext = MemoryContextSwitchTo(per_query_ctx);
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tupstore = tuplestore_begin_heap(true, false, work_mem);
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rsinfo->returnMode = SFRM_Materialize;
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rsinfo->setResult = tupstore;
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rsinfo->setDesc = tupdesc;
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MemoryContextSwitchTo(oldcontext);
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PutMemoryContextsStatsTupleStore(tupstore, tupdesc,
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TopMemoryContext, NULL, 0);
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/* clean up and return the tuplestore */
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tuplestore_donestoring(tupstore);
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return (Datum) 0;
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}
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@ -21,10 +21,8 @@
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#include "postgres.h"
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#include "funcapi.h"
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#include "mb/pg_wchar.h"
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#include "miscadmin.h"
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#include "utils/builtins.h"
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#include "utils/memdebug.h"
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#include "utils/memutils.h"
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@ -69,11 +67,6 @@ static void MemoryContextStatsPrint(MemoryContext context, void *passthru,
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#define AssertNotInCriticalSection(context) \
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Assert(CritSectionCount == 0 || (context)->allowInCritSection)
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/* ----------
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* The max bytes for showing identifiers of MemoryContext.
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* ----------
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*/
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#define MEMORY_CONTEXT_IDENT_DISPLAY_SIZE 1024
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/*****************************************************************************
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* EXPORTED ROUTINES *
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@ -1228,133 +1221,3 @@ pchomp(const char *in)
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n--;
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return pnstrdup(in, n);
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}
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/*
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* PutMemoryContextsStatsTupleStore
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* One recursion level for pg_get_backend_memory_contexts.
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*/
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static void
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PutMemoryContextsStatsTupleStore(Tuplestorestate *tupstore,
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TupleDesc tupdesc, MemoryContext context,
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const char *parent, int level)
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{
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#define PG_GET_BACKEND_MEMORY_CONTEXTS_COLS 9
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Datum values[PG_GET_BACKEND_MEMORY_CONTEXTS_COLS];
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bool nulls[PG_GET_BACKEND_MEMORY_CONTEXTS_COLS];
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MemoryContextCounters stat;
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MemoryContext child;
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const char *name;
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const char *ident;
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AssertArg(MemoryContextIsValid(context));
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name = context->name;
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ident = context->ident;
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/*
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* To be consistent with logging output, we label dynahash contexts
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* with just the hash table name as with MemoryContextStatsPrint().
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*/
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if (ident && strcmp(name, "dynahash") == 0)
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{
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name = ident;
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ident = NULL;
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}
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/* Examine the context itself */
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memset(&stat, 0, sizeof(stat));
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(*context->methods->stats) (context, NULL, (void *) &level, &stat);
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memset(values, 0, sizeof(values));
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memset(nulls, 0, sizeof(nulls));
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if (name)
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values[0] = CStringGetTextDatum(name);
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else
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nulls[0] = true;
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if (ident)
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{
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int idlen = strlen(ident);
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char clipped_ident[MEMORY_CONTEXT_IDENT_DISPLAY_SIZE];
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/*
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* Some identifiers such as SQL query string can be very long,
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* truncate oversize identifiers.
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*/
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if (idlen >= MEMORY_CONTEXT_IDENT_DISPLAY_SIZE)
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idlen = pg_mbcliplen(ident, idlen, MEMORY_CONTEXT_IDENT_DISPLAY_SIZE - 1);
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memcpy(clipped_ident, ident, idlen);
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clipped_ident[idlen] = '\0';
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values[1] = CStringGetTextDatum(clipped_ident);
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}
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else
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nulls[1] = true;
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if (parent)
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values[2] = CStringGetTextDatum(parent);
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else
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nulls[2] = true;
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values[3] = Int32GetDatum(level);
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values[4] = Int64GetDatum(stat.totalspace);
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values[5] = Int64GetDatum(stat.nblocks);
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values[6] = Int64GetDatum(stat.freespace);
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values[7] = Int64GetDatum(stat.freechunks);
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values[8] = Int64GetDatum(stat.totalspace - stat.freespace);
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tuplestore_putvalues(tupstore, tupdesc, values, nulls);
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for (child = context->firstchild; child != NULL; child = child->nextchild)
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{
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PutMemoryContextsStatsTupleStore(tupstore, tupdesc,
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child, name, level + 1);
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}
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}
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/*
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* pg_get_backend_memory_contexts
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* SQL SRF showing backend memory context.
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*/
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Datum
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pg_get_backend_memory_contexts(PG_FUNCTION_ARGS)
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{
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ReturnSetInfo *rsinfo = (ReturnSetInfo *) fcinfo->resultinfo;
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TupleDesc tupdesc;
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Tuplestorestate *tupstore;
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MemoryContext per_query_ctx;
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MemoryContext oldcontext;
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/* check to see if caller supports us returning a tuplestore */
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if (rsinfo == NULL || !IsA(rsinfo, ReturnSetInfo))
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ereport(ERROR,
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(errcode(ERRCODE_FEATURE_NOT_SUPPORTED),
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errmsg("set-valued function called in context that cannot accept a set")));
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if (!(rsinfo->allowedModes & SFRM_Materialize))
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ereport(ERROR,
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(errcode(ERRCODE_FEATURE_NOT_SUPPORTED),
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errmsg("materialize mode required, but it is not allowed in this context")));
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/* Build a tuple descriptor for our result type */
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if (get_call_result_type(fcinfo, NULL, &tupdesc) != TYPEFUNC_COMPOSITE)
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elog(ERROR, "return type must be a row type");
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per_query_ctx = rsinfo->econtext->ecxt_per_query_memory;
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oldcontext = MemoryContextSwitchTo(per_query_ctx);
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tupstore = tuplestore_begin_heap(true, false, work_mem);
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rsinfo->returnMode = SFRM_Materialize;
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rsinfo->setResult = tupstore;
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rsinfo->setDesc = tupdesc;
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MemoryContextSwitchTo(oldcontext);
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PutMemoryContextsStatsTupleStore(tupstore, tupdesc,
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TopMemoryContext, NULL, 0);
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/* clean up and return the tuplestore */
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tuplestore_donestoring(tupstore);
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return (Datum) 0;
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}
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