Compile-time edge module compilation check, native support for ConstMapObserver

fuzzers/baby/backtrace_baby_fuzzers/c_code_with_fork_executor/src/main.rs

@@ -47,7 +47,7 @@ pub fn main() {
     };
     // Create an observation channel using the signals map
     let observer =
-        unsafe { ConstMapObserver::<u8, 3>::from_mut_ptr("signals", ptr::NonNull::new(map_ptr)) };
+        unsafe { ConstMapObserver::<u8, 3>::from_mut_ptr("signals", ptr::NonNull::new(map_ptr).expect("map ptr is null.") ) };
     // Create a stacktrace observer
     let mut bt = shmem_provider.new_on_shmem::<Option<u64>>(None).unwrap();
     let bt_observer = BacktraceObserver::new(

libafl_qemu/src/modules/edges/helpers.rs

@@ -67,7 +67,7 @@ mod generators {
         if IS_CONST_MAP {
             const {
                 assert!(
-                    IS_CONST_MAP && MAP_SIZE > 0,
+                    !IS_CONST_MAP || MAP_SIZE > 0,
                     "The size of a const map should be bigger than 0."
                 );
                 MAP_SIZE.overflowing_sub(1).0