1 /*
2 *
3 * Copyright 2016 gRPC authors.
4 *
5 * Licensed under the Apache License, Version 2.0 (the "License");
6 * you may not use this file except in compliance with the License.
7 * You may obtain a copy of the License at
8 *
9 * http://www.apache.org/licenses/LICENSE-2.0
10 *
11 * Unless required by applicable law or agreed to in writing, software
12 * distributed under the License is distributed on an "AS IS" BASIS,
13 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
14 * See the License for the specific language governing permissions and
15 * limitations under the License.
16 *
17 */
18
19 #include <stdbool.h>
20
21 #include <dirent.h>
22 #include <gflags/gflags.h>
23 #include <grpc/support/alloc.h>
24 #include <grpc/support/log.h>
25 #include <gtest/gtest.h>
26 #include <stdio.h>
27 #include <sys/types.h>
28
29 #include "src/core/lib/gpr/env.h"
30 #include "src/core/lib/iomgr/load_file.h"
31 #include "test/core/util/test_config.h"
32
33 extern "C" int LLVMFuzzerTestOneInput(const uint8_t* data, size_t size);
34 extern bool squelch;
35 extern bool leak_check;
36
37 // In some distros, gflags is in the namespace google, and in some others,
38 // in gflags. This hack is enabling us to find both.
39 namespace google {}
40 namespace gflags {}
41 using namespace google;
42 using namespace gflags;
43
44 DEFINE_string(file, "", "Use this file as test data");
45 DEFINE_string(directory, "", "Use this directory as test data");
46
47 class FuzzerCorpusTest : public ::testing::TestWithParam<std::string> {};
48
TEST_P(FuzzerCorpusTest,RunOneExample)49 TEST_P(FuzzerCorpusTest, RunOneExample) {
50 gpr_log(GPR_DEBUG, "Example file: %s", GetParam().c_str());
51 grpc_slice buffer;
52 squelch = false;
53 leak_check = false;
54 GPR_ASSERT(GRPC_LOG_IF_ERROR("load_file",
55 grpc_load_file(GetParam().c_str(), 0, &buffer)));
56 LLVMFuzzerTestOneInput(GRPC_SLICE_START_PTR(buffer),
57 GRPC_SLICE_LENGTH(buffer));
58 grpc_slice_unref(buffer);
59 }
60
61 class ExampleGenerator
62 : public ::testing::internal::ParamGeneratorInterface<std::string> {
63 public:
64 virtual ::testing::internal::ParamIteratorInterface<std::string>* Begin()
65 const;
66 virtual ::testing::internal::ParamIteratorInterface<std::string>* End() const;
67
68 private:
Materialize() const69 void Materialize() const {
70 if (examples_.empty()) {
71 if (!FLAGS_file.empty()) examples_.push_back(FLAGS_file);
72 if (!FLAGS_directory.empty()) {
73 char* test_srcdir = gpr_getenv("TEST_SRCDIR");
74 if (test_srcdir != nullptr) {
75 FLAGS_directory = test_srcdir +
76 std::string("/com_github_grpc_grpc/") +
77 FLAGS_directory;
78 }
79 DIR* dp;
80 struct dirent* ep;
81 dp = opendir(FLAGS_directory.c_str());
82
83 if (dp != nullptr) {
84 while ((ep = readdir(dp)) != nullptr) {
85 if (ep->d_type == DT_REG) {
86 examples_.push_back(FLAGS_directory + "/" + ep->d_name);
87 }
88 }
89
90 (void)closedir(dp);
91 } else {
92 perror("Couldn't open the directory");
93 abort();
94 }
95 gpr_free(test_srcdir);
96 }
97 }
98 }
99
100 mutable std::vector<std::string> examples_;
101 };
102
103 class ExampleIterator
104 : public ::testing::internal::ParamIteratorInterface<std::string> {
105 public:
ExampleIterator(const ExampleGenerator & base_,std::vector<std::string>::const_iterator begin)106 ExampleIterator(const ExampleGenerator& base_,
107 std::vector<std::string>::const_iterator begin)
108 : base_(base_), begin_(begin), current_(begin) {}
109
BaseGenerator() const110 virtual const ExampleGenerator* BaseGenerator() const { return &base_; }
111
Advance()112 virtual void Advance() { current_++; }
Clone() const113 virtual ExampleIterator* Clone() const { return new ExampleIterator(*this); }
Current() const114 virtual const std::string* Current() const { return &*current_; }
115
Equals(const ParamIteratorInterface<std::string> & other) const116 virtual bool Equals(const ParamIteratorInterface<std::string>& other) const {
117 return &base_ == other.BaseGenerator() &&
118 current_ == dynamic_cast<const ExampleIterator*>(&other)->current_;
119 }
120
121 private:
ExampleIterator(const ExampleIterator & other)122 ExampleIterator(const ExampleIterator& other)
123 : base_(other.base_), begin_(other.begin_), current_(other.current_) {}
124
125 const ExampleGenerator& base_;
126 const std::vector<std::string>::const_iterator begin_;
127 std::vector<std::string>::const_iterator current_;
128 };
129
130 ::testing::internal::ParamIteratorInterface<std::string>*
Begin() const131 ExampleGenerator::Begin() const {
132 Materialize();
133 return new ExampleIterator(*this, examples_.begin());
134 }
135
136 ::testing::internal::ParamIteratorInterface<std::string>*
End() const137 ExampleGenerator::End() const {
138 Materialize();
139 return new ExampleIterator(*this, examples_.end());
140 }
141
142 INSTANTIATE_TEST_CASE_P(
143 CorpusExamples, FuzzerCorpusTest,
144 ::testing::internal::ParamGenerator<std::string>(new ExampleGenerator));
145
main(int argc,char ** argv)146 int main(int argc, char** argv) {
147 grpc_test_init(argc, argv);
148 ParseCommandLineFlags(&argc, &argv, true);
149 ::testing::InitGoogleTest(&argc, argv);
150
151 return RUN_ALL_TESTS();
152 }
153