Add modified cygnus hooks

src/rvprof_hooks.c

@@ -0,0 +1,28 @@
+#include "rvprof_internal.h"
+
+// Here, we override cygnus function hooks to insert our own profiling logic for all 
+// code parts compiled using -finstrument functions.
+
+void __cyg_profile_func_enter(void *this_fn, void *call_site){
+    
+    if (!g_rvprof.config.enable_hooks) return;
+
+    const char* func_name = rvprof_symbols_lookup(this_fn);
+    rvprof_region_begin(func_name);
+
+
+}
+
+void __cyg_profile_func_exit(void *this_fn, void *call_site){
+   if (!g_rvprof.config.enable_hooks || !g_rvprof.initialized || g_rvprof.stack_ptr < 0) return;
+
+    const char* func_name = rvprof_symbols_lookup(this_fn);
+    rvprof_region_end(func_name);
+
+    // auto-finalize on main function exit
+    if (rvprof_utils_is_main_function(func_name)) {
+        fprintf(stderr, "RVProf: Auto-finalizing on main() exit\n");
+        rvprof_finalize();
+    }
+}
+