Merge pull request #29 from R9295/main

fix forkserver sending message when not necessary

unicornafl.cpp

@@ -537,14 +537,13 @@ class UCAFL {
  /* Parent supports testcases via shared map - and the user wants to
  * use it. Tell AFL. */
  status = (FS_OPT_ENABLED | FS_OPT_SHDMEM_FUZZ);
+ /* Phone home and tell the parent that we're OK. If parent isn't there,
+ assume we're not running in forkserver mode and just execute
+ program. */
+ if (write(FORKSRV_FD + 1, &status, 4) != 4)
+ return UC_AFL_RET_NO_AFL;
  }
 
- /* Phone home and tell the parent that we're OK. If parent isn't there,
- assume we're not running in forkserver mode and just execute
- program. */
-
- if (write(FORKSRV_FD + 1, &status, 4) != 4)
- return UC_AFL_RET_NO_AFL;
 
  /* afl tells us in an extra message if it accepted this option or not */
  if (this->afl_testcase_ptr_ && getenv(SHM_FUZZ_ENV_VAR)) {