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// Copyright 2023 The Dawn & Tint Authors
//
// Redistribution and use in source and binary forms, with or without
// modification, are permitted provided that the following conditions are met:
//
// 1. Redistributions of source code must retain the above copyright notice, this
// list of conditions and the following disclaimer.
//
// 2. Redistributions in binary form must reproduce the above copyright notice,
// this list of conditions and the following disclaimer in the documentation
// and/or other materials provided with the distribution.
//
// 3. Neither the name of the copyright holder nor the names of its
// contributors may be used to endorse or promote products derived from
// this software without specific prior written permission.
//
// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
// AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
// IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
// DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
// FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
// DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
// SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
// CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
// OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
#include <iostream>
#include <string>
#include <unordered_map>
#include "src/tint/cmd/fuzz/wgsl/fuzz.h"
#include "src/tint/utils/cli/cli.h"
#include "src/tint/utils/macros/defer.h"
#include "src/tint/utils/text/base64.h"
namespace {
tint::fuzz::wgsl::Options options;
} // namespace
extern "C" int LLVMFuzzerTestOneInput(const uint8_t* input, size_t size) {
if (size > 0) {
std::string_view wgsl(reinterpret_cast<const char*>(input), size);
auto data = tint::DecodeBase64FromComments(wgsl);
tint::fuzz::wgsl::Run(wgsl, options, data.Slice());
}
return 0;
}
extern "C" int LLVMFuzzerInitialize(int* argc, char*** argv) {
tint::cli::OptionSet opts;
tint::Vector<std::string_view, 8> arguments;
for (int i = 1; i < *argc; i++) {
std::string_view arg((*argv)[i]);
if (!arg.empty()) {
arguments.Push(arg);
}
}
auto show_help = [&] {
std::cerr << "Custom fuzzer options:" << std::endl;
opts.ShowHelp(std::cerr);
std::cerr << std::endl;
// Change args to show libfuzzer help
std::cerr << "Standard libfuzzer "; // libfuzzer will print 'Usage:'
static char help[] = "-help=1";
*argc = 2;
(*argv)[1] = help;
};
auto& opt_help = opts.Add<tint::cli::BoolOption>("help", "shows the usage");
auto& opt_filter = opts.Add<tint::cli::StringOption>(
"filter", "runs only the fuzzers with the given substring");
auto& opt_concurrent =
opts.Add<tint::cli::BoolOption>("concurrent", "runs the fuzzers concurrently");
auto& opt_verbose =
opts.Add<tint::cli::BoolOption>("verbose", "prints the name of each fuzzer before running");
auto& opt_dxc = opts.Add<tint::cli::StringOption>("dxc", "path to DXC DLL");
tint::cli::ParseOptions parse_opts;
parse_opts.ignore_unknown = true;
if (auto res = opts.Parse(arguments, parse_opts); res != tint::Success) {
show_help();
std::cerr << res.Failure();
return 0;
}
if (opt_help.value.value_or(false)) {
show_help();
return 0;
}
options.filter = opt_filter.value.value_or("");
options.run_concurrently = opt_concurrent.value.value_or(false);
options.verbose = opt_verbose.value.value_or(false);
options.dxc = opt_dxc.value.value_or("");
return 0;
}