From 4f0de28c77db8f6cfe15a56e8fa371be345476cd Mon Sep 17 00:00:00 2001
From: Marshall Clow <mclow.lists@gmail.com>
Date: Thu, 18 Jan 2018 16:52:19 +0000
Subject: [PATCH] A simple program for testing OSS-Fuzz test cases locally.

llvm-svn: 322863
---
 libcxx/fuzzing/fuzz_test.cpp | 111 +++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 111 insertions(+)
 create mode 100644 libcxx/fuzzing/fuzz_test.cpp

diff --git a/libcxx/fuzzing/fuzz_test.cpp b/libcxx/fuzzing/fuzz_test.cpp
new file mode 100644
index 0000000..a3cacfe
--- /dev/null
+++ b/libcxx/fuzzing/fuzz_test.cpp
@@ -0,0 +1,111 @@
+// -*- C++ -*-
+//===------------------------- fuzz_test.cpp ------------------------------===//
+//
+//                     The LLVM Compiler Infrastructure
+//
+// This file is dual licensed under the MIT and the University of Illinois Open
+// Source Licenses. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+
+//  A simple program for running regressions on the fuzzing routines.
+//  This code is not part of any shipping product.
+//
+//  To build:
+//      clang++ -std=c++11 fuzz_test.cpp fuzzing.cpp
+//
+//  To use:
+//      fuzz_test -r partial_sort [-v] files...
+//
+//  Each file should contain a test case.
+
+
+#include <iostream>
+#include <fstream>
+#include <vector>
+#include <map>
+#include <chrono>
+
+#include "fuzzing.h"
+
+typedef int (*FuzzProc) (const uint8_t *data, size_t size);
+
+const std::map<std::string, FuzzProc> procs = {
+    {"sort",                fuzzing::sort},
+    {"stable_sort",         fuzzing::stable_sort},
+    {"partition",           fuzzing::partition},
+    {"partition_copy",      fuzzing::partition_copy},
+    {"stable_partition",    fuzzing::stable_partition},
+    {"unique",              fuzzing::unique},
+    {"unique_copy",         fuzzing::unique_copy},
+    {"nth_element",         fuzzing::nth_element},
+    {"partial_sort",        fuzzing::partial_sort},
+    {"partial_sort_copy",   fuzzing::partial_sort_copy},
+    {"make_heap",           fuzzing::make_heap},
+    {"push_heap",           fuzzing::push_heap},
+    {"pop_heap",            fuzzing::pop_heap},
+    {"regex_ECMAScript",    fuzzing::regex_ECMAScript},
+    {"regex_POSIX",         fuzzing::regex_POSIX},
+    {"regex_extended",      fuzzing::regex_extended},
+    {"regex_awk",           fuzzing::regex_awk},
+    {"regex_grep",          fuzzing::regex_grep},
+    {"regex_egrep",         fuzzing::regex_egrep},
+    {"search",              fuzzing::search}
+};
+
+
+
+bool verbose = false;
+
+void test_one(const char *filename, FuzzProc fp)
+{
+    std::vector<uint8_t> v;
+    std::ifstream f (filename, std::ios::binary);
+    if (!f.is_open())
+        std::cerr << "## Can't open '" << filename << "'" << std::endl;
+    else {
+        typedef std::istream_iterator<uint8_t> Iter;
+        std::copy(Iter(f), Iter(), std::back_inserter(v));
+        if (verbose)
+            std::cout << "File '" << filename << "' contains " << v.size() << " entries" << std::endl;
+        const auto start_time = std::chrono::steady_clock::now();
+        int ret = fp (v.data(), v.size());
+        const auto finish_time = std::chrono::steady_clock::now();
+        if (ret != 0)
+            std::cerr << "## Failure code: " << ret << std::endl;
+        if (verbose)
+            std::cout << "Execution time: "
+                << std::chrono::duration_cast<std::chrono::milliseconds>(finish_time - start_time).count()
+                << " milliseconds" << std::endl;
+        }
+}
+
+void usage (const char *name)
+{
+    std::cout << "Usage: " << name << " -r proc [-v] files..." << std::endl;
+    std::cout << "Supported routines:" << std::endl;
+    for (const auto &p : procs)
+        std::cout << "    " << p.first << std::endl;
+    std::cout << std::endl;
+}
+
+// Poor man's command-line options
+const std::string dashR("-r");
+const std::string dashV("-v");
+
+int main(int argc, char *argv[])
+{
+    if (argc < 4 || dashR != argv[1] || procs.find(argv[2]) == procs.end())
+        usage(argv[0]);
+    else {
+        FuzzProc fp = procs.find(argv[2])->second;
+        int firstFile = 3;
+        if (dashV == argv[firstFile])
+        {
+            verbose = true;
+            ++firstFile;
+        }
+        for (int i = firstFile; i < argc; ++i)
+            test_one(argv[i], fp);
+        }
+}
-- 
2.7.4