Enhanced TuiMonitor display to include Current Testcase Index and use…

libafl/src/monitors/tui/mod.rs

@@ -392,6 +392,12 @@ impl Monitor for TuiMonitor {
             client.executions(),
             exec_sec
         );
+
+        // Display "Current Testcase Index" if available
+        if let Some(stat) = client.get_user_stats("Current Testcase Index") {
+            write!(fmt, ", Testcase Index: {}", stat.value()).unwrap();
+        }
+
         for (key, val) in client.user_stats() {
             write!(fmt, ", {key}: {val}").unwrap();
         }

libafl/src/stages/afl_stats.rs

@@ -115,6 +115,8 @@ pub struct AflStatsStage<C, E, EM, I, O, S, Z> {
     /// The core we are bound to
     core_id: CoreId,
     phantom_data: PhantomData<(E, EM, I, O, S, Z)>,
+    report_current_corpus_idx: bool,
+    last_sent_corpus_idx: Option<usize>,
 }
 
 /// AFL++'s `fuzzer_stats`
@@ -268,7 +270,29 @@ where
                 "state is not currently processing a corpus index",
             ));
         };
+        // Clone or copy the required data from `state`
+        let corpus_idx_value = corpus_idx.0; // Extract `usize` value from `CorpusId`
+
+        // Fire the UpdateUserStats event with the corpus index
+        if self.report_current_corpus_idx {
+            if self.last_sent_corpus_idx != Some(corpus_idx_value) {
+                manager.fire(
+                    state,
+                    Event::UpdateUserStats {
+                        name: Cow::Borrowed("Current Testcase Index"),
+                        value: UserStats::new(
+                            UserStatsValue::Number(corpus_idx_value as u64),
+                            AggregatorOps::Sum,
+                        ),
+                        phantom: PhantomData,
+                    },
+                )?;
+                // Update the last_sent_corpus_idx to the current value
+                self.last_sent_corpus_idx = Some(corpus_idx_value);
+            }
+        }
         let testcase = state.corpus().get(corpus_idx)?.borrow();
+
         // NOTE: scheduled_count represents the amount of fuzz runs a
         // testcase has had. Since this stage is kept at the very end of stage list,
         // the entry would have been fuzzed already (and should contain IsFavoredMetadata) but would have a scheduled count of zero
@@ -658,6 +682,7 @@ pub struct AflStatsStageBuilder<C, E, EM, I, O, S, Z> {
     version: String,
     target_mode: String,
     phantom_data: PhantomData<(E, EM, I, O, S, Z)>,
+    report_current_corpus_idx: bool,
 }
 
 impl<C, E, EM, I, O, S, Z> AflStatsStageBuilder<C, E, EM, I, O, S, Z>
@@ -682,6 +707,7 @@ where
             version: String::default(),
             target_mode: String::default(),
             phantom_data: PhantomData,
+            report_current_corpus_idx: false,
         }
     }
 
@@ -817,7 +843,9 @@ where
             dict_count: self.dict_count,
             core_id: self.core_id.unwrap_or(CoreId(0)),
             autotokens_enabled: self.uses_autotokens,
+            report_current_corpus_idx: self.report_current_corpus_idx, // Set field
             phantom_data: PhantomData,
+            last_sent_corpus_idx: None,
         })
     }
 }