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//
//
// Copyright 2016 gRPC authors.
//
// 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
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
//
//
#include <dirent.h>
#include <stdint.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <algorithm>
#include <string>
#include <vector>
#include "absl/flags/flag.h"
#include "absl/strings/string_view.h"
#include "absl/types/optional.h"
#include "gtest/gtest.h"
#include <grpc/slice.h>
#include <grpc/support/alloc.h>
#include <grpc/support/log.h>
#include "src/core/lib/gprpp/env.h"
#include "src/core/lib/iomgr/error.h"
#include "src/core/lib/iomgr/load_file.h"
#include "test/core/util/test_config.h"
#include "test/cpp/util/test_config.h"
extern "C" int LLVMFuzzerTestOneInput(const uint8_t* data, size_t size);
extern bool squelch;
ABSL_FLAG(std::string, file, "", "Use this file as test data");
ABSL_FLAG(std::string, directory, "", "Use this directory as test data");
class FuzzerCorpusTest : public ::testing::TestWithParam<std::string> {};
TEST_P(FuzzerCorpusTest, RunOneExample) {
// Need to call grpc_init() here to use a slice, but need to shut it
// down before calling LLVMFuzzerTestOneInput(), because most
// implementations of that function will initialize and shutdown gRPC
// internally.
gpr_log(GPR_INFO, "Example file: %s", GetParam().c_str());
grpc_slice buffer;
squelch = false;
GPR_ASSERT(GRPC_LOG_IF_ERROR("load_file",
grpc_load_file(GetParam().c_str(), 0, &buffer)));
size_t length = GRPC_SLICE_LENGTH(buffer);
void* data = gpr_malloc(length);
if (length > 0) {
memcpy(data, GRPC_SLICE_START_PTR(buffer), length);
}
grpc_slice_unref(buffer);
LLVMFuzzerTestOneInput(static_cast<uint8_t*>(data), length);
gpr_free(data);
}
class ExampleGenerator
: public ::testing::internal::ParamGeneratorInterface<std::string> {
public:
::testing::internal::ParamIteratorInterface<std::string>* Begin()
const override;
::testing::internal::ParamIteratorInterface<std::string>* End()
const override;
private:
void Materialize() const {
if (examples_.empty()) {
if (!absl::GetFlag(FLAGS_file).empty()) {
examples_.push_back(absl::GetFlag(FLAGS_file));
}
if (!absl::GetFlag(FLAGS_directory).empty()) {
auto test_srcdir = grpc_core::GetEnv("TEST_SRCDIR");
gpr_log(GPR_DEBUG, "test_srcdir=\"%s\"",
test_srcdir.has_value() ? test_srcdir->c_str() : "(null)");
std::string directory = absl::GetFlag(FLAGS_directory);
if (test_srcdir.has_value()) {
directory =
*test_srcdir + std::string("/com_github_grpc_grpc/") + directory;
}
gpr_log(GPR_DEBUG, "Using corpus directory: %s", directory.c_str());
DIR* dp;
struct dirent* ep;
dp = opendir(directory.c_str());
if (dp != nullptr) {
while ((ep = readdir(dp)) != nullptr) {
if (strcmp(ep->d_name, ".") != 0 && strcmp(ep->d_name, "..") != 0) {
examples_.push_back(directory + "/" + ep->d_name);
}
}
(void)closedir(dp);
} else {
perror("Couldn't open the directory");
abort();
}
}
}
// Make sure we don't succeed without doing anything, which caused
// us to be blind to our fuzzers not running for 9 months.
GPR_ASSERT(!examples_.empty());
// Get a consistent ordering of examples so problems don't just show up on
// CI
std::sort(examples_.begin(), examples_.end());
}
mutable std::vector<std::string> examples_;
};
class ExampleIterator
: public ::testing::internal::ParamIteratorInterface<std::string> {
public:
ExampleIterator(const ExampleGenerator& base_,
std::vector<std::string>::const_iterator begin)
: base_(base_), begin_(begin), current_(begin) {}
const ExampleGenerator* BaseGenerator() const override { return &base_; }
void Advance() override { current_++; }
ExampleIterator* Clone() const override { return new ExampleIterator(*this); }
const std::string* Current() const override { return &*current_; }
bool Equals(const ParamIteratorInterface<std::string>& other) const override {
return &base_ == other.BaseGenerator() &&
current_ == dynamic_cast<const ExampleIterator*>(&other)->current_;
}
private:
ExampleIterator(const ExampleIterator& other)
: base_(other.base_), begin_(other.begin_), current_(other.current_) {}
const ExampleGenerator& base_;
const std::vector<std::string>::const_iterator begin_;
std::vector<std::string>::const_iterator current_;
};
::testing::internal::ParamIteratorInterface<std::string>*
ExampleGenerator::Begin() const {
Materialize();
return new ExampleIterator(*this, examples_.begin());
}
::testing::internal::ParamIteratorInterface<std::string>*
ExampleGenerator::End() const {
Materialize();
return new ExampleIterator(*this, examples_.end());
}
INSTANTIATE_TEST_SUITE_P(
CorpusExamples, FuzzerCorpusTest,
::testing::internal::ParamGenerator<std::string>(new ExampleGenerator));
int main(int argc, char** argv) {
grpc::testing::TestEnvironment env(&argc, argv);
grpc::testing::InitTest(&argc, &argv, true);
::testing::InitGoogleTest(&argc, argv);
return RUN_ALL_TESTS();
}
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