control log level

src/include/deepstate/DeepState.h

@@ -64,6 +64,8 @@ DECLARE_bool(take_over);
 DECLARE_bool(abort_on_fail);
 DECLARE_bool(verbose_reads);
 
+DECLARE_int(log_level);
+
 enum {
   DeepState_InputSize = 8192
 };

src/lib/DeepState.c

@@ -38,6 +38,8 @@ DEFINE_bool(take_over, false, "Replay test cases in take-over mode.");
 DEFINE_bool(abort_on_fail, false, "Abort on file replay failure (useful in file fuzzing).");
 DEFINE_bool(verbose_reads, false, "Report on bytes being read during execution of test.");
 
+DEFINE_int(log_level, 0, "Minimum level of logging to output.")
+
 /* Pointer to the last registers DeepState_TestInfo data structure */
 struct DeepState_TestInfo *DeepState_LastTestInfo = NULL;
 

src/lib/Log.c

@@ -73,7 +73,8 @@ char DeepState_LogBuf[DeepState_LogBufSize + 1] = {};
 /* Log a C string. */
 DEEPSTATE_NOINLINE
 void DeepState_Log(enum DeepState_LogLevel level, const char *str) {
-  if (DeepState_UsingLibFuzzer && (level < DeepState_LogExternal)) {
+  if ((DeepState_UsingLibFuzzer && (level < DeepState_LogExternal)) ||
+      (level < FLAGS_log_level)) {
     return;
   }
   memset(DeepState_LogBuf, 0, DeepState_LogBufSize);