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https://git.postgresql.org/git/postgresql.git
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82bbb60c30
The macaddr opclass stores two macaddr structs (each of size 6) in an index column that's declared as being of type gbtreekey16, ie 16 bytes. In the original coding this led to passing a palloc'd value of size 12 to the index insertion code, so that data would be fetched past the end of the allocated value during index tuple construction. This makes valgrind unhappy. In principle it could result in a SIGSEGV, though with the current implementation of palloc there's no risk since the 12-byte request size would be rounded up to 16 bytes anyway. To fix, add a field to struct gbtree_ninfo showing the declared size of the index datums, and use that in the palloc requests; and use palloc0 to be sure that any wasted bytes are cleanly initialized. Per report from Andres Freund. No back-patch since there's no current risk of a real problem.
343 lines
8.1 KiB
C
343 lines
8.1 KiB
C
/*
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* contrib/btree_gist/btree_time.c
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*/
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#include "postgres.h"
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#include "btree_gist.h"
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#include "btree_utils_num.h"
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#include "utils/date.h"
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#include "utils/timestamp.h"
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typedef struct
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{
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TimeADT lower;
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TimeADT upper;
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} timeKEY;
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/*
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** time ops
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*/
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PG_FUNCTION_INFO_V1(gbt_time_compress);
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PG_FUNCTION_INFO_V1(gbt_timetz_compress);
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PG_FUNCTION_INFO_V1(gbt_time_union);
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PG_FUNCTION_INFO_V1(gbt_time_picksplit);
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PG_FUNCTION_INFO_V1(gbt_time_consistent);
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PG_FUNCTION_INFO_V1(gbt_time_distance);
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PG_FUNCTION_INFO_V1(gbt_timetz_consistent);
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PG_FUNCTION_INFO_V1(gbt_time_penalty);
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PG_FUNCTION_INFO_V1(gbt_time_same);
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#ifdef USE_FLOAT8_BYVAL
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#define TimeADTGetDatumFast(X) TimeADTGetDatum(X)
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#else
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#define TimeADTGetDatumFast(X) PointerGetDatum(&(X))
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#endif
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static bool
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gbt_timegt(const void *a, const void *b)
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{
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const TimeADT *aa = (const TimeADT *) a;
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const TimeADT *bb = (const TimeADT *) b;
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return DatumGetBool(DirectFunctionCall2(time_gt,
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TimeADTGetDatumFast(*aa),
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TimeADTGetDatumFast(*bb)));
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}
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static bool
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gbt_timege(const void *a, const void *b)
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{
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const TimeADT *aa = (const TimeADT *) a;
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const TimeADT *bb = (const TimeADT *) b;
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return DatumGetBool(DirectFunctionCall2(time_ge,
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TimeADTGetDatumFast(*aa),
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TimeADTGetDatumFast(*bb)));
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}
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static bool
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gbt_timeeq(const void *a, const void *b)
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{
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const TimeADT *aa = (const TimeADT *) a;
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const TimeADT *bb = (const TimeADT *) b;
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return DatumGetBool(DirectFunctionCall2(time_eq,
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TimeADTGetDatumFast(*aa),
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TimeADTGetDatumFast(*bb)));
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}
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static bool
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gbt_timele(const void *a, const void *b)
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{
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const TimeADT *aa = (const TimeADT *) a;
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const TimeADT *bb = (const TimeADT *) b;
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return DatumGetBool(DirectFunctionCall2(time_le,
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TimeADTGetDatumFast(*aa),
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TimeADTGetDatumFast(*bb)));
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}
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static bool
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gbt_timelt(const void *a, const void *b)
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{
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const TimeADT *aa = (const TimeADT *) a;
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const TimeADT *bb = (const TimeADT *) b;
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return DatumGetBool(DirectFunctionCall2(time_lt,
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TimeADTGetDatumFast(*aa),
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TimeADTGetDatumFast(*bb)));
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}
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static int
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gbt_timekey_cmp(const void *a, const void *b)
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{
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timeKEY *ia = (timeKEY *) (((const Nsrt *) a)->t);
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timeKEY *ib = (timeKEY *) (((const Nsrt *) b)->t);
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int res;
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res = DatumGetInt32(DirectFunctionCall2(time_cmp, TimeADTGetDatumFast(ia->lower), TimeADTGetDatumFast(ib->lower)));
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if (res == 0)
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return DatumGetInt32(DirectFunctionCall2(time_cmp, TimeADTGetDatumFast(ia->upper), TimeADTGetDatumFast(ib->upper)));
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return res;
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}
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static float8
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gbt_time_dist(const void *a, const void *b)
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{
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const TimeADT *aa = (const TimeADT *) a;
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const TimeADT *bb = (const TimeADT *) b;
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Interval *i;
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i = DatumGetIntervalP(DirectFunctionCall2(time_mi_time,
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TimeADTGetDatumFast(*aa),
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TimeADTGetDatumFast(*bb)));
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return (float8) Abs(INTERVAL_TO_SEC(i));
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}
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static const gbtree_ninfo tinfo =
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{
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gbt_t_time,
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sizeof(TimeADT),
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16, /* sizeof(gbtreekey16) */
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gbt_timegt,
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gbt_timege,
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gbt_timeeq,
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gbt_timele,
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gbt_timelt,
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gbt_timekey_cmp,
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gbt_time_dist
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};
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PG_FUNCTION_INFO_V1(time_dist);
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Datum
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time_dist(PG_FUNCTION_ARGS)
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{
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Datum diff = DirectFunctionCall2(time_mi_time,
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PG_GETARG_DATUM(0),
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PG_GETARG_DATUM(1));
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PG_RETURN_INTERVAL_P(abs_interval(DatumGetIntervalP(diff)));
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}
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/**************************************************
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* time ops
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**************************************************/
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Datum
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gbt_time_compress(PG_FUNCTION_ARGS)
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{
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GISTENTRY *entry = (GISTENTRY *) PG_GETARG_POINTER(0);
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GISTENTRY *retval = NULL;
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PG_RETURN_POINTER(gbt_num_compress(retval, entry, &tinfo));
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}
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Datum
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gbt_timetz_compress(PG_FUNCTION_ARGS)
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{
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GISTENTRY *entry = (GISTENTRY *) PG_GETARG_POINTER(0);
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GISTENTRY *retval;
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if (entry->leafkey)
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{
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timeKEY *r = (timeKEY *) palloc(sizeof(timeKEY));
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TimeTzADT *tz = DatumGetTimeTzADTP(entry->key);
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TimeADT tmp;
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retval = palloc(sizeof(GISTENTRY));
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/* We are using the time + zone only to compress */
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#ifdef HAVE_INT64_TIMESTAMP
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tmp = tz->time + (tz->zone * INT64CONST(1000000));
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#else
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tmp = (tz->time + tz->zone);
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#endif
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r->lower = r->upper = tmp;
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gistentryinit(*retval, PointerGetDatum(r),
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entry->rel, entry->page,
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entry->offset, FALSE);
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}
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else
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retval = entry;
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PG_RETURN_POINTER(retval);
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}
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Datum
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gbt_time_consistent(PG_FUNCTION_ARGS)
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{
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GISTENTRY *entry = (GISTENTRY *) PG_GETARG_POINTER(0);
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TimeADT query = PG_GETARG_TIMEADT(1);
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StrategyNumber strategy = (StrategyNumber) PG_GETARG_UINT16(2);
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/* Oid subtype = PG_GETARG_OID(3); */
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bool *recheck = (bool *) PG_GETARG_POINTER(4);
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timeKEY *kkk = (timeKEY *) DatumGetPointer(entry->key);
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GBT_NUMKEY_R key;
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/* All cases served by this function are exact */
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*recheck = false;
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key.lower = (GBT_NUMKEY *) &kkk->lower;
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key.upper = (GBT_NUMKEY *) &kkk->upper;
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PG_RETURN_BOOL(
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gbt_num_consistent(&key, (void *) &query, &strategy, GIST_LEAF(entry), &tinfo)
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);
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}
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Datum
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gbt_time_distance(PG_FUNCTION_ARGS)
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{
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GISTENTRY *entry = (GISTENTRY *) PG_GETARG_POINTER(0);
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TimeADT query = PG_GETARG_TIMEADT(1);
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/* Oid subtype = PG_GETARG_OID(3); */
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timeKEY *kkk = (timeKEY *) DatumGetPointer(entry->key);
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GBT_NUMKEY_R key;
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key.lower = (GBT_NUMKEY *) &kkk->lower;
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key.upper = (GBT_NUMKEY *) &kkk->upper;
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PG_RETURN_FLOAT8(
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gbt_num_distance(&key, (void *) &query, GIST_LEAF(entry), &tinfo)
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);
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}
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Datum
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gbt_timetz_consistent(PG_FUNCTION_ARGS)
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{
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GISTENTRY *entry = (GISTENTRY *) PG_GETARG_POINTER(0);
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TimeTzADT *query = PG_GETARG_TIMETZADT_P(1);
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StrategyNumber strategy = (StrategyNumber) PG_GETARG_UINT16(2);
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/* Oid subtype = PG_GETARG_OID(3); */
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bool *recheck = (bool *) PG_GETARG_POINTER(4);
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timeKEY *kkk = (timeKEY *) DatumGetPointer(entry->key);
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TimeADT qqq;
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GBT_NUMKEY_R key;
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/* All cases served by this function are inexact */
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*recheck = true;
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#ifdef HAVE_INT64_TIMESTAMP
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qqq = query->time + (query->zone * INT64CONST(1000000));
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#else
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qqq = (query->time + query->zone);
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#endif
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key.lower = (GBT_NUMKEY *) &kkk->lower;
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key.upper = (GBT_NUMKEY *) &kkk->upper;
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PG_RETURN_BOOL(
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gbt_num_consistent(&key, (void *) &qqq, &strategy, GIST_LEAF(entry), &tinfo)
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);
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}
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Datum
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gbt_time_union(PG_FUNCTION_ARGS)
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{
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GistEntryVector *entryvec = (GistEntryVector *) PG_GETARG_POINTER(0);
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void *out = palloc(sizeof(timeKEY));
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*(int *) PG_GETARG_POINTER(1) = sizeof(timeKEY);
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PG_RETURN_POINTER(gbt_num_union((void *) out, entryvec, &tinfo));
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}
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Datum
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gbt_time_penalty(PG_FUNCTION_ARGS)
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{
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timeKEY *origentry = (timeKEY *) DatumGetPointer(((GISTENTRY *) PG_GETARG_POINTER(0))->key);
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timeKEY *newentry = (timeKEY *) DatumGetPointer(((GISTENTRY *) PG_GETARG_POINTER(1))->key);
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float *result = (float *) PG_GETARG_POINTER(2);
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Interval *intr;
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double res;
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double res2;
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intr = DatumGetIntervalP(DirectFunctionCall2(
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time_mi_time,
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TimeADTGetDatumFast(newentry->upper),
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TimeADTGetDatumFast(origentry->upper)));
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res = INTERVAL_TO_SEC(intr);
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res = Max(res, 0);
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intr = DatumGetIntervalP(DirectFunctionCall2(
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time_mi_time,
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TimeADTGetDatumFast(origentry->lower),
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TimeADTGetDatumFast(newentry->lower)));
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res2 = INTERVAL_TO_SEC(intr);
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res2 = Max(res2, 0);
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res += res2;
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*result = 0.0;
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if (res > 0)
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{
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intr = DatumGetIntervalP(DirectFunctionCall2(
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time_mi_time,
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TimeADTGetDatumFast(origentry->upper),
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TimeADTGetDatumFast(origentry->lower)));
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*result += FLT_MIN;
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*result += (float) (res / (res + INTERVAL_TO_SEC(intr)));
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*result *= (FLT_MAX / (((GISTENTRY *) PG_GETARG_POINTER(0))->rel->rd_att->natts + 1));
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}
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PG_RETURN_POINTER(result);
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}
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Datum
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gbt_time_picksplit(PG_FUNCTION_ARGS)
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{
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PG_RETURN_POINTER(gbt_num_picksplit(
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(GistEntryVector *) PG_GETARG_POINTER(0),
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(GIST_SPLITVEC *) PG_GETARG_POINTER(1),
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&tinfo
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));
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}
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Datum
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gbt_time_same(PG_FUNCTION_ARGS)
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{
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timeKEY *b1 = (timeKEY *) PG_GETARG_POINTER(0);
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timeKEY *b2 = (timeKEY *) PG_GETARG_POINTER(1);
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bool *result = (bool *) PG_GETARG_POINTER(2);
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*result = gbt_num_same((void *) b1, (void *) b2, &tinfo);
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PG_RETURN_POINTER(result);
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}
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