Fix msan uninitialized-read error in sstring.c

jlebar · jlebar · commit e83c36e93124 · 2022-10-07T16:02:57.000-07:00
With msan and fpesan, msan detects that XS-&gt;C is not initialized.  I'm
not sure why we need fpesan, but maybe it's necessary to block an
optimization.  (My test is too large to run without -O2.)
diff --git a/testu01/sstring.c b/testu01/sstring.c
@@ -324,13 +324,15 @@ static sstring_Corr * CreateCorr (int s)
 
    XS = corr->Corr[0] = util_Malloc (sizeof (struct InfoListC));
    XS->Nb = 0;
+   XS->C = 0;
    XS->Pop = 1;
    XS->Ext = NULL;
    XS->Ext0 = NULL;
    XS->Next = NULL;
 
    XS = corr->Corr[1] = util_Malloc (sizeof (struct InfoListC));
    XS->Nb = 1;
+   XS->C = 0;
    bitset_SetBit (XS->C, 0);
    XS->Pop = 2;
    XS->Ext = NULL;
