108 lines
3.0 KiB
C++
108 lines
3.0 KiB
C++
// Copyright 2021 The Tint 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 "fuzzers/cli.h"
|
|
|
|
#include <cstring>
|
|
#include <iostream>
|
|
#include <limits>
|
|
#include <sstream>
|
|
#include <string>
|
|
#include <utility>
|
|
|
|
namespace tint {
|
|
namespace fuzzers {
|
|
namespace {
|
|
|
|
const char* const kHelpMessage = R"(
|
|
This is a fuzzer for the Tint compiler that works by mutating the AST.
|
|
|
|
Below is a list of all supported parameters for this fuzzer. You may want to
|
|
run it with -help=1 to check out libfuzzer parameters.
|
|
|
|
-tint_dump_input=
|
|
If `true`, the fuzzer will dump input data to a file with
|
|
name tint_input_<hash>.spv/wgsl, where the hash is the hash
|
|
of the input data.
|
|
|
|
-tint_help
|
|
Show this message. Note that there is also a -help=1
|
|
parameter that will display libfuzzer's help message.
|
|
)";
|
|
|
|
bool HasPrefix(const char* str, const char* prefix) {
|
|
return strncmp(str, prefix, strlen(prefix)) == 0;
|
|
}
|
|
|
|
[[noreturn]] void InvalidParam(const char* param) {
|
|
std::cout << "Invalid value for " << param << std::endl;
|
|
std::cout << kHelpMessage << std::endl;
|
|
exit(1);
|
|
}
|
|
|
|
bool ParseBool(const char* value, bool* out) {
|
|
if (!strcmp(value, "true")) {
|
|
*out = true;
|
|
} else if (!strcmp(value, "false")) {
|
|
*out = false;
|
|
} else {
|
|
return false;
|
|
}
|
|
return true;
|
|
}
|
|
|
|
} // namespace
|
|
|
|
CliParams ParseCliParams(int* argc, char** argv) {
|
|
CliParams cli_params;
|
|
auto help = false;
|
|
|
|
for (int i = *argc - 1; i > 0; --i) {
|
|
auto param = argv[i];
|
|
auto recognized_parameter = true;
|
|
|
|
if (HasPrefix(param, "-tint_dump_input=")) {
|
|
if (!ParseBool(param + sizeof("-tint_dump_input=") - 1,
|
|
&cli_params.dump_input)) {
|
|
InvalidParam(param);
|
|
}
|
|
} else if (!strcmp(param, "-tint_help")) {
|
|
help = true;
|
|
} else {
|
|
recognized_parameter = false;
|
|
}
|
|
|
|
if (recognized_parameter) {
|
|
// Remove the recognized parameter from the list of all parameters by
|
|
// swapping it with the last one. This will suppress warnings in the
|
|
// libFuzzer about unrecognized parameters. By default, libFuzzer thinks
|
|
// that all user-defined parameters start with two dashes. However, we are
|
|
// forced to use a single one to make the fuzzer compatible with the
|
|
// ClusterFuzz.
|
|
std::swap(argv[i], argv[*argc - 1]);
|
|
*argc -= 1;
|
|
}
|
|
}
|
|
|
|
if (help) {
|
|
std::cout << kHelpMessage << std::endl;
|
|
exit(0);
|
|
}
|
|
|
|
return cli_params;
|
|
}
|
|
|
|
} // namespace fuzzers
|
|
} // namespace tint
|