add some comments to code snippets

[web.git] / personal / _posts / 2022-04-11-provenance-exposed.md

diff --git a/personal/_posts/2022-04-11-provenance-exposed.md b/personal/_posts/2022-04-11-provenance-exposed.md
index 317cc3039649b0a658efef22cd82cbab636c4508..5265df60efbcfa4da7b7f33fed1498eed98d0b83 100644 (file)
--- a/personal/_posts/2022-04-11-provenance-exposed.md
+++ b/personal/_posts/2022-04-11-provenance-exposed.md
@@ -78,7 +78,7 @@ static int uwu(int *restrict x, int *restrict y) {
 
   int *y2 = y-1;
   uintptr_t y2addr = (uintptr_t)y2;
-  int *ptr = (int*)y2addr;
+  int *ptr = (int*)y2addr; // <-- using y2addr
   *ptr = 1;
 
   return *x;
@@ -104,12 +104,12 @@ static int uwu(int *restrict x, int *restrict y) {
   int *ptr = (int*)y2addr;
   *ptr = 1;
 
-  return 0;
+  return 0; // <-- hard-coded return value
 }
 
 int main() {
-  int i = 0;
-  int res = uwu(&i, &i);
+  int i[2] = {0, 0};
+  int res = uwu(&i[0], &i[1]);
   // Now this prints 0!
   printf("%d\n", res);
 }