input length and read input pointer

fuzzers/FRET/src/fuzzer.rs

@@ -81,6 +81,14 @@ pub fn fuzz() {
     let input_addr = virt2phys(input_addr,&elf) as GuestPhysAddr;
     println!("FUZZ_INPUT @ {:#x}", input_addr);
 
+    let test_length_ptr = elf
+        .resolve_symbol("FUZZ_LENGTH", 0);
+    let test_length_ptr = Option::map_or(test_length_ptr, None, |x| Some(virt2phys(x,&elf) as u32));
+
+    let input_counter_ptr = elf
+        .resolve_symbol(&env::var("FUZZ_POINTER").unwrap_or_else(|_| "FUZZ_POINTER".to_owned()), 0);
+    let input_counter_ptr = Option::map_or(input_counter_ptr, None, |x| Some(virt2phys(x,&elf) as u32));
+
     let main_addr = elf
         .resolve_symbol(&env::var("FUZZ_MAIN").unwrap_or_else(|_| "FUZZ_INPUT".to_owned()), 0)
         .expect("Symbol main not found");
@@ -145,6 +153,9 @@ pub fn fuzz() {
                 }
 
                 emu.write_phys_mem(input_addr, buf);
+                if let Some(s) = test_length_ptr {
+                    emu.write_phys_mem(s as u64, &len.to_le_bytes())
+                }
 
                 emu.run();
 
@@ -211,7 +222,7 @@ pub fn fuzz() {
         let mut fuzzer = StdFuzzer::new(scheduler, feedback, objective);
         let mut hooks = QemuHooks::new(&emu,
             tuple_list!(QemuEdgeCoverageHelper::default(),QemuStateRestoreHelper::new(),
-        QemuSystemStateHelper::new(svh,curr_tcb_pointer,task_queue_addr,0,app_range)));
+        QemuSystemStateHelper::new(svh,curr_tcb_pointer,task_queue_addr,input_counter_ptr,app_range)));
 
         // Create a QEMU in-process executor
         let executor = QemuExecutor::new(

fuzzers/FRET/src/systemstate/feedbacks.rs

@@ -238,12 +238,13 @@ where
     {
         let observer = observers.match_name::<QemuSystemStateObserver>("systemstate")
             .expect("QemusystemstateObserver not found");
+        let names : Vec<String> = observer.last_run.iter().map(|x| x.current_task.task_name.clone()).collect();
         match &self.dumpfile {
             Some(s) => {
                     std::fs::write(s,ron::to_string(&observer.last_run).expect("Error serializing hashmap")).expect("Can not dump to file");
                     self.dumpfile = None
                 },
-            None => if !self.dump_metadata {println!("{:?}",observer.last_run);}
+            None => if !self.dump_metadata {println!("{:?}\n{:?}",observer.last_run,names);}
         };
         if self.dump_metadata {self.last_trace=Some(observer.last_run.clone());}
         Ok(!self.dump_metadata)

fuzzers/FRET/src/systemstate/helpers.rs

@@ -36,7 +36,7 @@ pub struct QemuSystemStateHelper {
     kerneladdr: u32,
     tcb_addr: u32,
     ready_queues: u32,
-    input_counter: u32,
+    input_counter: Option<u32>,
     app_range: Range<u32>,
 }
 
@@ -46,7 +46,7 @@ impl QemuSystemStateHelper {
         kerneladdr: u32,
         tcb_addr: u32,
         ready_queues: u32,
-        input_counter: u32,
+        input_counter: Option<u32>,
         app_range: Range<u32>,
     ) -> Self {
         QemuSystemStateHelper {
@@ -94,7 +94,10 @@ where
         (*c.raw_ptr()).can_do_io = can_do_io;
     }
     let mut buf : [u8; 4] = [0,0,0,0];
-    // unsafe { emulator.read_mem(h.input_counter.into(), &mut buf) };
+    match h.input_counter {
+        Some(s) => unsafe { emulator.read_mem(s, &mut buf); },
+        None => (),
+    };
     systemstate.input_counter = u32::from_le_bytes(buf);
 
     let curr_tcb_addr : freertos::void_ptr = freertos::emu_lookup::lookup(emulator, h.tcb_addr);