ref: f332cf05579e82b213944a331c7b4f37f88f2587
parent: 60f9467c011394d8ebeebed15733ebd0b58a10d0
author: Ori Bernstein <ori@eigenstate.org>
date: Sat Aug 13 18:12:20 EDT 2022
dtracy: correctly look up aggregate keys the ANode struct contains a variable sized buffer for the key, however when we created and copied the aggregate, we used struct assignment to initialize the node. the struct assignment only knows about the fixed size portion of the struct, and did not copy the key, which mean that key lookups would fail, and we would insert a new value into the aggregation every time, both leaking the memory and producng incorrect results.
--- a/sys/src/cmd/dtracy/agg.c
+++ b/sys/src/cmd/dtracy/agg.c
@@ -93,7 +93,7 @@
np = (ANode *) avllookup(tp, key, 0);
if(np == nil){np = emalloc(sizeof(ANode) - 1 + a->keysize);
- *np = *key;
+ memcpy(np, key, sizeof(ANode) - 1 + a->keysize);
createrecord(a->type, np, (s64int*)&p[8+a->keysize]);
avlinsert(tp, np);
}else