afl: add define to disable mgt threads

The inherent non-deterministic nature of the management threads
creates variable test cases.

src/counters.c

@@ -221,6 +221,10 @@ static ConfNode *GetConfig(void) {
 static void StatsInitCtx(void)
 {
     SCEnter();
+#ifdef AFLFUZZ_DISABLE_MGTTHREADS
+    stats_enabled = FALSE;
+    SCReturn;
+#endif
     ConfNode *stats = GetConfig();
     if (stats != NULL) {
         const char *enabled = ConfNodeLookupChildValue(stats, "enabled");

src/flow-manager.c

@@ -105,6 +105,9 @@ typedef struct FlowTimeoutCounters_ {
  */
 void FlowDisableFlowManagerThread(void)
 {
+#ifdef AFLFUZZ_DISABLE_MGTTHREADS
+    return;
+#endif
     ThreadVars *tv = NULL;
     int cnt = 0;
 
@@ -708,6 +711,9 @@ static uint64_t FlowGetMemuse(void)
 /** \brief spawn the flow manager thread */
 void FlowManagerThreadSpawn()
 {
+#ifdef AFLFUZZ_DISABLE_MGTTHREADS
+    return;
+#endif
     intmax_t setting = 1;
     (void)ConfGetInt("flow.managers", &setting);
 
@@ -868,6 +874,9 @@ int FlowRecyclerReadyToShutdown(void)
 /** \brief spawn the flow recycler thread */
 void FlowRecyclerThreadSpawn()
 {
+#ifdef AFLFUZZ_DISABLE_MGTTHREADS
+    return;
+#endif
     intmax_t setting = 1;
     (void)ConfGetInt("flow.recyclers", &setting);
 
@@ -917,6 +926,9 @@ void FlowRecyclerThreadSpawn()
  */
 void FlowDisableFlowRecyclerThread(void)
 {
+#ifdef AFLFUZZ_DISABLE_MGTTHREADS
+    return;
+#endif
     ThreadVars *tv = NULL;
     int cnt = 0;
 

src/suricata-common.h

@@ -229,6 +229,7 @@
 #endif
 
 #define AFLFUZZ_NO_RANDOM 1
+#define AFLFUZZ_DISABLE_MGTTHREADS 1
 
 /* we need this to stringify the defines which are supplied at compiletime see:
    http://gcc.gnu.org/onlinedocs/gcc-3.4.1/cpp/Stringification.html#Stringification */