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authorvan Hauser <vh@thc.org>2020-11-30 13:03:51 +0100
committervan Hauser <vh@thc.org>2020-11-30 13:03:51 +0100
commit856968c13b6222c3fc72d7a5d5f22e2e728ac0c6 (patch)
treeb5302964d2901933f3048d352424532701d8d29f /examples/persistent_demo/persistent_demo.c
parent63c317218bfe1ffc91443a2620c653581aff0ba1 (diff)
downloadafl++-856968c13b6222c3fc72d7a5d5f22e2e728ac0c6.tar.gz
persistent_demo -> persistent_mode
Diffstat (limited to 'examples/persistent_demo/persistent_demo.c')
-rw-r--r--examples/persistent_demo/persistent_demo.c112
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diff --git a/examples/persistent_demo/persistent_demo.c b/examples/persistent_demo/persistent_demo.c
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--- a/examples/persistent_demo/persistent_demo.c
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@@ -1,112 +0,0 @@
-/*
- american fuzzy lop++ - persistent mode example
- --------------------------------------------
-
- Originally written by Michal Zalewski
-
- Copyright 2015 Google Inc. All rights reserved.
-
- Licensed under the Apache License, Version 2.0 (the "License");
- you may not use this file except in compliance with the License.
- You may obtain a copy of the License at:
-
- http://www.apache.org/licenses/LICENSE-2.0
-
- This file demonstrates the high-performance "persistent mode" that may be
- suitable for fuzzing certain fast and well-behaved libraries, provided that
- they are stateless or that their internal state can be easily reset
- across runs.
-
- To make this work, the library and this shim need to be compiled in LLVM
- mode using afl-clang-fast (other compiler wrappers will *not* work).
-
- */
-
-#include <stdio.h>
-#include <stdlib.h>
-#include <unistd.h>
-#include <signal.h>
-#include <string.h>
-
-/* Main entry point. */
-
-int main(int argc, char **argv) {
-
- ssize_t len; /* how much input did we read? */
- char buf[100]; /* Example-only buffer, you'd replace it with other global or
- local variables appropriate for your use case. */
-
- /* The number passed to __AFL_LOOP() controls the maximum number of
- iterations before the loop exits and the program is allowed to
- terminate normally. This limits the impact of accidental memory leaks
- and similar hiccups. */
-
- __AFL_INIT();
- while (__AFL_LOOP(1000)) {
-
- /*** PLACEHOLDER CODE ***/
-
- /* STEP 1: Fully re-initialize all critical variables. In our example, this
- involves zeroing buf[], our input buffer. */
-
- memset(buf, 0, 100);
-
- /* STEP 2: Read input data. When reading from stdin, no special preparation
- is required. When reading from a named file, you need to close
- the old descriptor and reopen the file first!
-
- Beware of reading from buffered FILE* objects such as stdin. Use
- raw file descriptors or call fopen() / fdopen() in every pass. */
-
- len = read(0, buf, 100);
-
- /* STEP 3: This is where we'd call the tested library on the read data.
- We just have some trivial inline code that faults on 'foo!'. */
-
- /* do we have enough data? */
- if (len < 8) continue;
-
- if (buf[0] == 'f') {
-
- printf("one\n");
- if (buf[1] == 'o') {
-
- printf("two\n");
- if (buf[2] == 'o') {
-
- printf("three\n");
- if (buf[3] == '!') {
-
- printf("four\n");
- if (buf[4] == '!') {
-
- printf("five\n");
- if (buf[5] == '!') {
-
- printf("six\n");
- abort();
-
- }
-
- }
-
- }
-
- }
-
- }
-
- }
-
- /*** END PLACEHOLDER CODE ***/
-
- }
-
- /* Once the loop is exited, terminate normally - AFL will restart the process
- when this happens, with a clean slate when it comes to allocated memory,
- leftover file descriptors, etc. */
-
- return 0;
-
-}
-