From 0d1c22f66866128c7d32ba54438dbc6c8831751a Mon Sep 17 00:00:00 2001
From: ifratric <ifratric@google.com>
Date: Wed, 1 Dec 2021 17:49:49 +0100
Subject: [PATCH] implement dry run

---
 fuzzer.cpp | 6 ++++++
 fuzzer.h   | 2 ++
 2 files changed, 8 insertions(+)

diff --git a/fuzzer.cpp b/fuzzer.cpp
index 3569a99..77346bd 100644
--- a/fuzzer.cpp
+++ b/fuzzer.cpp
@@ -107,6 +107,8 @@ void Fuzzer::ParseOptions(int argc, char **argv) {
   track_ranges = GetBinaryOption("-track_ranges", argc, argv, false);
 
   Sample::max_size = (size_t)GetIntOption("-max_sample_size", argc, argv, DEFAULT_MAX_SAMPLE_SIZE);
+
+  dry_run = GetBinaryOption("-dry_run", argc, argv, false);
 }
 
 void Fuzzer::SetupDirectories() {
@@ -596,6 +598,10 @@ void Fuzzer::SynchronizeAndGetJob(ThreadContext* tc, FuzzerJob* job) {
   }
 
   // create a job according to the state
+  if ((state == FUZZING) && dry_run) {
+    printf("Dry run done");
+    exit(0);
+  }
 
   if (state == FUZZING) {
     if (sample_queue.empty()) {
diff --git a/fuzzer.h b/fuzzer.h
index 3ed4e7f..4f0d703 100644
--- a/fuzzer.h
+++ b/fuzzer.h
@@ -240,6 +240,8 @@ class Fuzzer {
   bool clean_target_on_coverage;
   
   bool should_restore_state;
+
+  bool dry_run;
   
   Mutex crash_mutex;
   std::unordered_map<std::string, int> unique_crashes;