save trace of the found bug (#533)

Author: Raz0r

src/evm/cov_stage.rs

@@ -167,15 +167,7 @@ where
                 .deref()
                 .borrow_mut()
                 .save_trace(format!("{}/{}", self.trace_dir, i).as_str());
-            if let Some(bug_idx) = meta.corpus_idx_to_bug.get(&i.into()) {
-                for id in bug_idx {
-                    fs::copy(
-                        format!("{}/{}.json", self.trace_dir, i),
-                        format!("{}/bug_{}.json", self.trace_dir, id),
-                    )
-                    .unwrap();
-                }
-            }
+
             unsafe {
                 EVAL_COVERAGE = false;
             }

src/fuzzer.rs

@@ -380,6 +380,7 @@ where
         + HasExecutionResult<Loc, Addr, VS, Out, CI>
         + HasExecutions
         + HasMetadata
+        + HasCurrentInputIdx
         + HasRand
         + HasLastReportTime
         + UsesInput<Input = I>,
@@ -578,6 +579,18 @@ where
 
                 solution::generate_test(cur_report.clone(), minimized);
 
+                unsafe {
+                    for bug_idx in ORACLE_OUTPUT.iter().map(|v| v["bug_idx"].as_u64().unwrap()) {
+                        let src = format!("{}/traces/{}.json", self.work_dir, &state.get_current_input_idx());
+                        let dest = format!("{}/traces/bug_{}.json", self.work_dir, bug_idx);
+                        if std::fs::metadata(&src).is_ok() {
+                            std::fs::copy(&src, &dest).unwrap();
+                        } else {
+                            eprintln!("Source trace {} does not exist", src);
+                        }
+                    }
+                }
+
                 let vuln_file = format!("{}/vuln_info.jsonl", self.work_dir.as_str());
                 let mut f = OpenOptions::new()
                     .create(true)