Changeset: 2b3f324a1fa9 for MonetDB
URL: https://dev.monetdb.org/hg/MonetDB/rev/2b3f324a1fa9
Modified Files:
gdk/gdk_string.c
Branch: Jun2020
Log Message:
Fix bug when switching from duplicate eliminated to none duplicate eliminated.
diffs (56 lines):
diff --git a/gdk/gdk_string.c b/gdk/gdk_string.c
--- a/gdk/gdk_string.c
+++ b/gdk/gdk_string.c
@@ -108,8 +108,8 @@ strCleanHash(Heap *h, bool rebuild)
* started. */
memset(newhash, 0, sizeof(newhash));
pos = GDK_STRHASHSIZE;
- while (pos < h->free && pos < GDK_ELIMLIMIT) {
- pad = GDK_VARALIGN - (pos & (GDK_VARALIGN - 1));
+ while (pos < h->free &&
+ pos + (pad = GDK_VARALIGN - (pos & (GDK_VARALIGN - 1))) <
GDK_ELIMLIMIT) {
if (pad < sizeof(stridx_t))
pad += GDK_VARALIGN;
pos += pad + extralen;
@@ -219,7 +219,6 @@ checkUTF8(const char *v)
var_t
strPut(Heap *h, var_t *dst, const char *v)
{
- size_t elimbase = GDK_ELIMBASE(h->free);
size_t pad;
size_t pos, len = strLen(v);
const size_t extralen = h->hashash ? EXTRALEN : 0;
@@ -265,19 +264,16 @@ strPut(Heap *h, var_t *dst, const char *
}
pad = GDK_VARALIGN - (h->free & (GDK_VARALIGN - 1));
- if (elimbase == 0) { /* i.e. h->free < GDK_ELIMLIMIT */
+ if (GDK_ELIMBASE(h->free + pad) == 0) { /* i.e. h->free+pad <
GDK_ELIMLIMIT */
if (pad < sizeof(stridx_t)) {
/* make room for hash link */
pad += GDK_VARALIGN;
}
- } else if (extralen == 0) { /* i.e., h->hashash == FALSE */
- /* no VARSHIFT and no string hash value stored => no
- * padding/alignment needed */
+ } else if (GDK_ELIMBASE(h->free) != 0) {
+ /* no extra padding needed when no hash links needed
+ * (but only when padding doesn't cross duplicate
+ * elimination boundary) */
pad = 0;
- } else {
- /* pad to align on VARALIGN for VARSHIFT and/or string
- * hash value */
- pad &= (GDK_VARALIGN - 1);
}
/* check heap for space (limited to a certain maximum after
@@ -328,7 +324,7 @@ strPut(Heap *h, var_t *dst, const char *
/* maintain hash table */
pos -= extralen;
- if (elimbase == 0) { /* small string heap: link the next pointer */
+ if (GDK_ELIMBASE(pos) == 0) { /* small string heap: link the next
pointer */
/* the stridx_t next pointer directly precedes the
* string and optional (depending on hashash) hash
* value */
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