From: Guido Vranken <guidovranken@gmail.com>
Date: Sun, 13 Aug 2017 01:11:03 +0000 (+0200)
Subject: fuzzer-standalone-loader.c: add comments
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=d2b4ea016b1223c416d985b87d87b6ab94cd5795;p=thirdparty%2Fopenvpn.git

fuzzer-standalone-loader.c: add comments
---

diff --git a/src/openvpn/fuzzer-standalone-loader.c b/src/openvpn/fuzzer-standalone-loader.c
index c7382878e..9c1c9a377 100644
--- a/src/openvpn/fuzzer-standalone-loader.c
+++ b/src/openvpn/fuzzer-standalone-loader.c
@@ -3,6 +3,20 @@
 #include <sys/stat.h>
 #include <stdint.h>
 
+/* This is a standalone program that loads every file specified
+ * as a command-line argument, and runs LLVMFuzzerTestOneInput
+ * on this data. This function is normally called by libFuzzer
+ * for every input it generates. This standalone program
+ * makes it possible to run just a specific input or inputs.
+ *
+ * This is necessary if you want to test your input files
+ * with MemorySantizer, because libFuzzer doesn't work well
+ * with MemorySanitizer.
+ *
+ * Code inspired by:
+ * https://github.com/openssl/openssl/blob/master/fuzz/test-corpus.c
+ */
+
 int LLVMFuzzerTestOneInput(const uint8_t *data, size_t size);
 int LLVMFuzzerInitialize(int *argc, char ***argv);