[src/trunk]: src/lib/libedit/TEST Add an LLVM fuzzing wrapper for the portabl...

[christos <christos%NetBSD.org@localhost>]

details:   https://anonhg.NetBSD.org/src/rev/23b69571e010
branches:  trunk
changeset: 985828:23b69571e010
user:      christos <christos%NetBSD.org@localhost>
date:      Fri Sep 10 13:33:45 2021 +0000

description:
Add an LLVM fuzzing wrapper for the portable libedit (Christian Holler)

diffstat:

 lib/libedit/TEST/fuzz1.c |  63 ++++++++++++++++++++++++++++++++++++++++++++++++
 1 files changed, 63 insertions(+), 0 deletions(-)

diffs (67 lines):

diff -r 4ae52142fd5d -r 23b69571e010 lib/libedit/TEST/fuzz1.c
--- /dev/null   Thu Jan 01 00:00:00 1970 +0000
+++ b/lib/libedit/TEST/fuzz1.c  Fri Sep 10 13:33:45 2021 +0000
@@ -0,0 +1,63 @@
+/*
+ * build:
+ *   CC=clang CXX=clang++ CFLAGS="-fsanitize=address,fuzzer-no-link -g" \
+ *     CXXFLAGS="-fsanitize=address,fuzzer-no-link -g" ./configure && make
+ * run:
+ *   LD_LIBRARY_PATH=../src/.libs/ .libs/fuzz1 -max_len=32 \
+ *     -use_value_profile=1 -only_ascii=1
+ */
+#include <readline/readline.h>
+#include <locale.h>
+#include <stdint.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+
+int init = 0;
+
+int LLVMFuzzerTestOneInput(const uint8_t *Data, size_t Size) {
+  if (!Size)
+    return 0;
+
+  if (!init) {
+    setlocale(LC_CTYPE, "");
+    stifle_history(7);
+    init = 1;
+  }
+
+  clear_history();
+
+  size_t lasti = 0;
+
+  for (size_t i = 0;; ++i) {
+    if (i == Size || Data[i] == '\n') {
+      if (i - lasti) {
+        char *s = (char *)malloc(i - lasti + 1);
+        memcpy(s, &Data[lasti], i - lasti);
+        s[i - lasti] = '\0';
+
+        char *expansion;
+        int result;
+
+#ifdef DEBUG
+        fprintf(stderr, "Calling history_expand: >%s<\n", s);
+#endif
+        result = history_expand(s, &expansion);
+
+        if (result < 0 || result == 2) {
+          /* Errors ignored */
+        } else {
+          add_history(expansion);
+        }
+        free(expansion);
+        free(s);
+      }
+      lasti = i + 1;
+    }
+
+    if (i == Size)
+      break;
+  }
+
+  return 0;
+}