don't opt crc magic

liberize · Dec 5, 2024 · 74db1cb · 74db1cb
1 parent 54015ab
commit 74db1cb
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Showing 2 changed files with 17 additions and 2 deletions.
diff --git a/src/main.cpp b/src/main.cpp
@@ -42,6 +42,14 @@ enum ScriptFormat {
     LUA,
 };
 
+#ifdef VERIFY_CHECKSUM
+DISABLE_OPTIMIZATION FORCE_INLINE uint32_t* get_cksum_data() {
+    static uint32_t cksum_data[2];
+    memcpy(cksum_data, "ssccksum", 8);
+    return cksum_data;
+}
+#endif
+
 int main(int argc, char* argv[]) {
 #ifdef UNTRACEABLE
     check_debugger(true);
@@ -50,8 +58,7 @@ int main(int argc, char* argv[]) {
     std::string exe_path = get_exe_path();
 
 #ifdef VERIFY_CHECKSUM
-    static uint32_t cksum_data[2];  // use static to prevent compiler from optimizing
-    memcpy(cksum_data, "ssccksum", 8);
+    auto cksum_data = get_cksum_data();
     if (is_big_endian()) {
         cksum_data[0] = byteswap32(cksum_data[0]);
         cksum_data[1] = byteswap32(cksum_data[1]);

diff --git a/src/utils.h b/src/utils.h
@@ -22,6 +22,14 @@
 
 #define FORCE_INLINE __attribute__((always_inline)) inline
 
+#if defined(__GNUC__)
+#define DISABLE_OPTIMIZATION __attribute__((optimize("O0")))
+#elif defined(__clang__)
+#define DISABLE_OPTIMIZATION [[clang::optnone]]
+#else
+#define DISABLE_OPTIMIZATION
+#endif
+
 #define LOGD(fmt, ...)  /* fprintf(stdout, OBF(fmt "\n"), ##__VA_ARGS__) */
 #define LOGE(fmt, ...)  fprintf(stderr, OBF(fmt "\n"), ##__VA_ARGS__)