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asan: null pointer as arg 2 of memcpy

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Replace xmalloc+memcpy+free with xrealloc, avoiding the asan warning
on the initial allocation where we had memcpy(p,0,0).

	* cg_arcs.c (arc_add): Use xrealloc.
This commit is contained in:
Alan Modra
2025-05-01 14:43:46 +09:30
parent f72c4fa3d5
commit a388feed3d
1 changed files with 2 additions and 12 deletions
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14
gprof/cg_arcs.c
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@@ -89,7 +89,7 @@ void
arc_add (Sym *parent, Sym *child, unsigned long count)
{
static unsigned int maxarcs = 0;
Arc *arc, **newarcs;
Arc *arc;
DBG (TALLYDEBUG, printf ("[arc_add] %lu arcs from %s to %s\n",
count, parent->name, child->name));
@@ -124,17 +124,7 @@ arc_add (Sym *parent, Sym *child, unsigned long count)
maxarcs = 1;
maxarcs *= 2;
/* Allocate the new array. */
newarcs = (Arc **)xmalloc(sizeof (Arc *) * maxarcs);
/* Copy the old array's contents into the new array. */
memcpy (newarcs, arcs, numarcs * sizeof (Arc *));
/* Free up the old array. */
free (arcs);
/* And make the new array be the current array. */
arcs = newarcs;
arcs = xrealloc (arcs, sizeof (*arcs) * maxarcs);
}
/* Place this arc in the arc array. */