| // Copyright 2024 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 "src/tint/cmd/fuzz/ir/fuzz.h" |
| #include "src/tint/lang/core/ir/module.h" |
| #include "src/tint/lang/core/ir/validator.h" |
| #include "src/tint/utils/result/result.h" |
| |
| #if TINT_BUILD_IR_BINARY |
| |
| #include "src/tint/lang/core/ir/binary/decode.h" |
| #include "src/tint/utils/command/cli.h" |
| #include "src/tint/utils/containers/vector.h" |
| #include "src/tint/utils/macros/defer.h" |
| |
| TINT_BEGIN_DISABLE_PROTOBUF_WARNINGS(); |
| #include "src/libfuzzer/libfuzzer_macro.h" |
| #include "src/tint/utils/protos/ir_fuzz/ir_fuzz.pb.h" |
| #include "testing/libfuzzer/proto/lpm_interface.h" |
| TINT_END_DISABLE_PROTOBUF_WARNINGS(); |
| |
| namespace { |
| |
| tint::fuzz::ir::Options options; |
| |
| } |
| |
| DEFINE_BINARY_PROTO_FUZZER(const tint::cmd::fuzz::ir::pb::Root& pb) { |
| /// As the fuzzers are free to mutate the module, we need to deserialize a new module for each |
| /// sub-fuzzer. Because the protobuf may error when deserializing and the module may be invalid, |
| /// we early deserialize. If this fails, then we do not call Run(). |
| thread_local std::optional<tint::core::ir::Module> module; |
| { |
| auto decoded = tint::core::ir::binary::Decode(pb.module()); |
| if (decoded != tint::Success) { |
| return; // Failed to decode |
| } |
| module = std::move(decoded.Move()); |
| } |
| auto acquire_module = [&] { |
| if (!module) { |
| auto decoded = tint::core::ir::binary::Decode(pb.module()); |
| if (decoded != tint::Success) { |
| TINT_ICE() << "module successfully decoded once, then failed a subsequent time\n" |
| << decoded.Failure().reason; |
| } |
| module = std::move(decoded.Move()); |
| } |
| |
| auto out = std::move(module.value()); |
| module.reset(); |
| return out; |
| }; |
| |
| tint::Slice<const std::byte> data(reinterpret_cast<const std::byte*>(pb.data().data()), |
| pb.data().length()); |
| tint::fuzz::ir::Run(acquire_module, options, data); |
| } |
| |
| 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:" << '\n'; |
| opts.ShowHelp(std::cerr); |
| std::cerr << '\n'; |
| // 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"); |
| |
| 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); |
| return 0; |
| } |
| |
| #endif |