chore: add .venv and build artifacts to .gitignore

Author: sumin-world

.gitignore

@@ -29,3 +29,14 @@
 *.env
 .env
 tools/discord_audit_bot/.env
+# Python venv
+.venv/
+# Rust/C build artifacts
+/target/
+/**/target/
+/poCs/cache/flush_reload_attacker
+/poCs/cache/flush_reload_attacker_csv
+/poCs/cache/victim_sim
+# local env files
+.env
+tools/discord_audit_bot/.env

poCs/cache/flush_reload_attacker_csv.c

@@ -0,0 +1,35 @@
+// flush_reload_attacker_csv.c
+// Compile: gcc -O2 -o flush_reload_attacker_csv flush_reload_attacker_csv.c -march=native
+#include <stdio.h>
+#include <stdint.h>
+#include <x86intrin.h>
+#include <unistd.h>
+
+#define ITER 20000
+
+static inline uint64_t timed_read(volatile char *addr) {
+    unsigned int aux;
+    uint64_t t1 = __rdtscp(&aux);
+    volatile unsigned char v = *addr;
+    uint64_t t2 = __rdtscp(&aux);
+    (void)v;
+    return t2 - t1;
+}
+
+int main(void) {
+    static char probe[4096*256];
+    volatile char *addr = &probe[4096*42];
+
+    // CSV 헤더
+    printf("iter,cycles\n");
+
+    for (int i = 0; i < ITER; i++) {
+        _mm_clflush((void*)addr);                 // 캐시에서 해당 라인 flush
+        asm volatile("mfence" ::: "memory");      // 순서 보장 fence
+        usleep(100);                               // victim이 접근할 시간 약간 부여(100µs)
+
+        uint64_t t = timed_read(addr);            // 접근 시간 측정
+        printf("%d,%lu\n", i, (unsigned long)t);  // CSV 라인 출력
+    }
+    return 0;
+}