fix pizza mode

docs/Changelog.md

@@ -23,6 +23,7 @@ sending a mail to <afl-users+subscribe@googlegroups.com>.
     - add AFL_EARY_FORKSERVER to install the forkserver as earliest as
       possible in the target (for afl-gcc-fast/afl-clang-fast/
       afl-clang-lto)
+    - document and auto-activate pizza mode on condition
   - afl-cc:
     - converted all passed to use the new llvm pass manager for llvm 11+
     - AFL++ PCGUARD mode is not available for 10.0.1 anymore (11+ only)

docs/env_variables.md

@@ -549,6 +549,9 @@ checks or alter some of the more exotic semantics of the tool:
     constructors in your target you can set `AFL_EARLY_FORKSERVER`.
     Note that this is not a compile time option but a runtime option :-)
 
+  - set `AFL_PIZZA_MODE` to 1 to enable the April 1st stats menu, set to 0
+    to disable although it is 1st of April.
+
 ## 5) Settings for afl-qemu-trace
 
 The QEMU wrapper used to instrument binary-only code supports several settings:

include/afl-fuzz.h

@@ -483,7 +483,8 @@ typedef struct afl_state {
       debug,                            /* Debug mode                       */
       custom_only,                      /* Custom mutator only mode         */
       is_main_node,                     /* if this is the main node         */
-      is_secondary_node;                /* if this is a secondary instance  */
+      is_secondary_node,                /* if this is a secondary instance  */
+      pizza_is_served;                  /* pizza mode                       */
 
   u32 stats_update_freq;                /* Stats update frequency (execs)   */
 

src/afl-fuzz-state.c

@@ -502,6 +502,15 @@ void read_afl_environment(afl_state_t *afl, char **envp) {
 
             afl->afl_env.afl_pizza_mode =
                 atoi((u8 *)get_afl_env(afl_environment_variables[i]));
+            if (afl->afl_env.afl_pizza_mode == 0) {
+
+              afl->afl_env.afl_pizza_mode = 1;
+
+            } else {
+
+              afl->pizza_is_served = 1;
+
+            }
 
           }
 

src/afl-fuzz-stats.c

@@ -437,7 +437,7 @@ static void check_term_size(afl_state_t *afl) {
 
 void show_stats(afl_state_t *afl) {
 
-  if (afl->afl_env.afl_pizza_mode) {
+  if (afl->pizza_is_served) {
 
     show_stats_pizza(afl);
 

src/afl-fuzz.c

@@ -259,6 +259,7 @@ static void usage(u8 *argv0, int more_help) {
       "AFL_IGNORE_PROBLEMS: do not abort fuzzing if an incorrect setup is detected during a run\n"
       "AFL_IMPORT_FIRST: sync and import test cases from other fuzzer instances first\n"
       "AFL_INPUT_LEN_MIN/AFL_INPUT_LEN_MAX: like -g/-G set min/max fuzz length produced\n"
+      "AFL_PIZZA_MODE: 1 - enforce pizza mode, 0 - disable for April 1st\n"
       "AFL_KILL_SIGNAL: Signal ID delivered to child processes on timeout, etc. (default: SIGKILL)\n"
       "AFL_MAP_SIZE: the shared memory size for that target. must be >= the size\n"
       "              the target was compiled for\n"
@@ -2274,13 +2275,17 @@ int main(int argc, char **argv_orig, char **envp) {
       // queue is fully cycled.
       time_t     cursec = time(NULL);
       struct tm *curdate = localtime(&cursec);
-      if (curdate->tm_mon == 3 && curdate->tm_mday == 1) {
+      if (likely(!afl->afl_env.afl_pizza_mode)) {
 
-        afl->afl_env.afl_pizza_mode = 1;
+        if (unlikely(curdate->tm_mon == 3 && curdate->tm_mday == 1)) {
 
-      } else {
+          afl->pizza_is_served = 1;
 
-        afl->afl_env.afl_pizza_mode = 0;
+        } else {
+
+          afl->pizza_is_served = 0;
+
+        }
 
       }