1 files changed, 131 insertions, 0 deletions
diff --git a/include/afl-persistent-replay.h b/include/afl-persistent-replay.h
new file mode 100644
index 00000000..9e60ff9c
--- /dev/null
+++ b/include/afl-persistent-replay.h
@@ -0,0 +1,131 @@
+#ifndef _HAVE_PERSISTENT_REPLAY_H
+#define _HAVE_PERSISTENT_REPLAY_H
+
+#include <dirent.h>
+#include <string.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <malloc.h>
+#include <unistd.h>
+#include <sys/stat.h>
+#include <fcntl.h>
+
+#ifndef PATH_MAX
+  #define PATH_MAX 4096
+#endif
+
+static unsigned short int is_replay_record;
+static unsigned int       replay_record;
+static unsigned int       replay_record_cnt;
+static char               replay_record_path[PATH_MAX];
+static char              *replay_record_dir;
+static struct dirent    **record_list;
+
+#ifdef AFL_PERSISTENT_REPLAY_ARGPARSE
+static char **record_arg = NULL;
+#endif  // AFL_PERSISTENT_REPLAY_ARGPARSE
+
+static int select_files(const struct dirent *dirbuf) {
+
+  char fn[PATH_MAX];
+
+  if (dirbuf->d_name[0] == '.') {
+
+    return 0;
+
+  } else {
+
+    snprintf(fn, sizeof(fn), "RECORD:%06u", replay_record);
+    return !!strstr(dirbuf->d_name, fn);
+
+  }
+
+}
+
+static int compare_files(const struct dirent **da, const struct dirent **db) {
+
+  unsigned int c1 = 0, c2 = 0;
+
+  sscanf((*da)->d_name, "RECORD:%*u,cnt:%06u", &c1);
+  sscanf((*db)->d_name, "RECORD:%*u,cnt:%06u", &c2);
+
+  return c1 - c2;
+
+}
+
+__attribute__((destructor)) static void __afl_record_replay_destroy(void) {
+
+  for (int i = 0; i < replay_record_cnt; i++) {
+
+    free(record_list[i]);
+
+  }
+
+  free(record_list);
+
+}
+
+__attribute__((constructor)) static void __afl_record_replay_init(
+#ifdef AFL_PERSISTENT_REPLAY_ARGPARSE
+    int argc, char **argv
+#endif  // AFL_PERSISTENT_REPLAY_ARGPARSE
+) {
+
+#ifdef AFL_PERSISTENT_REPLAY_ARGPARSE
+  char **argp;
+#endif  // AFL_PERSISTENT_REPLAY_ARGPARSE
+
+  struct stat sb;
+
+  /* caveat: if harness uses @@ and we don't pass it, it will regardless loop
+   * the number of iterations defined for AFL_LOOP (on the same file)*/
+  if (!(is_replay_record = !!getenv("AFL_PERSISTENT_REPLAY"))) {
+
+    // printf("[warning] AFL_PERSISTENT_REPLAY not set.\n");
+    return;
+
+  }
+
+  replay_record = atoi(getenv("AFL_PERSISTENT_REPLAY"));
+  replay_record_dir = getenv("AFL_PERSISTENT_DIR");
+
+  if (!(stat(replay_record_dir, &sb) == 0 && S_ISDIR(sb.st_mode))) {
+
+    fprintf(stderr, "[error] Can't find the requested record directory!\n");
+    is_replay_record = 0;
+    return;
+
+  }
+
+  replay_record_cnt = scandir(replay_record_dir ? replay_record_dir : "./",
+                              &record_list, select_files, compare_files);
+
+  if (!replay_record_cnt) {
+
+    fprintf(stderr, "[error] Can't find the requested record!\n");
+    is_replay_record = 0;
+
+  }
+
+#ifdef AFL_PERSISTENT_REPLAY_ARGPARSE
+  argp = argv;
+  while (*argp) {
+
+    if (!strcmp(*argp, "@@")) {
+
+      record_arg = argp;
+      *record_arg = replay_record_path;
+      break;
+
+    }
+
+    ++argp;
+
+  }
+
+#endif  // AFL_PERSISTENT_REPLAY_ARGPARSE
+
+}
+
+#endif  // _HAVE_PERSISTENT_REPLAY_H
+