update xxh3 to 0.8.0, fix is_ascii

TODO.md

@@ -7,7 +7,6 @@
  - afl-plot to support multiple plot_data
  - afl_custom_fuzz_splice_optin()
  - intel-pt tracer
- - honor -O flags and -fno-unroll-loops in afl-cc
 
 ## Further down the road
 
@@ -22,7 +21,6 @@ gcc_plugin:
  - (wait for submission then decide)
 
 qemu_mode:
- - update to 5.x (if the performance bug is gone)
  - non colliding instrumentation
  - rename qemu specific envs to AFL_QEMU (AFL_ENTRYPOINT, AFL_CODE_START/END,
    AFL_COMPCOV_LEVEL?)

src/afl-fuzz-queue.c

@@ -138,9 +138,9 @@ static u8 check_if_text(struct queue_entry *q) {
     }
 
     // non-overlong 2-byte
-    if (((0xC2 <= buf[offset + 0] && buf[offset + 0] <= 0xDF) &&
+    if (len - offset > 1 &&
-         (0x80 <= buf[offset + 1] && buf[offset + 1] <= 0xBF)) &&
+        ((0xC2 <= buf[offset + 0] && buf[offset + 0] <= 0xDF) &&
-        len - offset > 1) {
+         (0x80 <= buf[offset + 1] && buf[offset + 1] <= 0xBF))) {
 
       offset += 2;
       utf8++;

src/afl-performance.c

@@ -22,7 +22,10 @@
 #include <stdint.h>
 #include "afl-fuzz.h"
 #include "types.h"
-#include "xxh3.h"
+
+#define XXH_INLINE_ALL
+#include "xxhash.h"
+#undef XXH_INLINE_ALL
 
 /* we use xoshiro256** instead of rand/random because it is 10x faster and has
    better randomness properties. */