diff options
Diffstat (limited to 'deps/v8/test/fuzzer/wasm-code.cc')
| -rw-r--r-- | deps/v8/test/fuzzer/wasm-code.cc | 51 |
1 files changed, 48 insertions, 3 deletions
diff --git a/deps/v8/test/fuzzer/wasm-code.cc b/deps/v8/test/fuzzer/wasm-code.cc index 3f7b091883..167680faf2 100644 --- a/deps/v8/test/fuzzer/wasm-code.cc +++ b/deps/v8/test/fuzzer/wasm-code.cc @@ -8,6 +8,7 @@ #include "include/v8.h" #include "src/isolate.h" #include "src/objects.h" +#include "src/ostreams.h" #include "src/wasm/wasm-interpreter.h" #include "src/wasm/wasm-module-builder.h" #include "src/wasm/wasm-module.h" @@ -20,6 +21,27 @@ using namespace v8::internal::wasm; extern "C" int LLVMFuzzerTestOneInput(const uint8_t* data, size_t size) { + // Save the flag so that we can change it and restore it later. + bool generate_test = v8::internal::FLAG_wasm_code_fuzzer_gen_test; + if (generate_test) { + v8::internal::OFStream os(stdout); + + os << "// Copyright 2017 the V8 project authors. All rights reserved." + << std::endl; + os << "// Use of this source code is governed by a BSD-style license that " + "can be" + << std::endl; + os << "// found in the LICENSE file." << std::endl; + os << std::endl; + os << "load(\"test/mjsunit/wasm/wasm-constants.js\");" << std::endl; + os << "load(\"test/mjsunit/wasm/wasm-module-builder.js\");" << std::endl; + os << std::endl; + os << "(function() {" << std::endl; + os << " var builder = new WasmModuleBuilder();" << std::endl; + os << " builder.addMemory(32, 32, false);" << std::endl; + os << " builder.addFunction(\"test\", kSig_i_iii)" << std::endl; + os << " .addBodyWithEnd([" << std::endl; + } v8_fuzzer::FuzzerSupport* support = v8_fuzzer::FuzzerSupport::Get(); v8::Isolate* isolate = support->GetIsolate(); v8::internal::Isolate* i_isolate = @@ -45,6 +67,8 @@ extern "C" int LLVMFuzzerTestOneInput(const uint8_t* data, size_t size) { v8::internal::wasm::WasmFunctionBuilder* f = builder.AddFunction(sigs.i_iii()); f->EmitCode(data, static_cast<uint32_t>(size)); + uint8_t end_opcode = kExprEnd; + f->EmitCode(&end_opcode, 1); f->ExportAs(v8::internal::CStrVector("main")); ZoneBuffer buffer(&zone); @@ -59,23 +83,44 @@ extern "C" int LLVMFuzzerTestOneInput(const uint8_t* data, size_t size) { i_isolate, &interpreter_thrower, buffer.begin(), buffer.end(), v8::internal::wasm::ModuleOrigin::kWasmOrigin, true)); + // Clear the flag so that the WebAssembly code is not printed twice. + v8::internal::FLAG_wasm_code_fuzzer_gen_test = false; if (module == nullptr) { + if (generate_test) { + v8::internal::OFStream os(stdout); + os << " ])" << std::endl; + os << " .exportFunc();" << std::endl; + os << " assertThrows(function() { builder.instantiate(); });" + << std::endl; + os << "})();" << std::endl; + } return 0; } + if (generate_test) { + v8::internal::OFStream os(stdout); + os << " ])" << std::endl; + os << " .exportFunc();" << std::endl; + os << " var module = builder.instantiate();" << std::endl; + os << " module.exports.test(1, 2, 3);" << std::endl; + os << "})();" << std::endl; + } + + ModuleWireBytes wire_bytes(buffer.begin(), buffer.end()); int32_t result_interpreted; bool possible_nondeterminism = false; { WasmVal args[] = {WasmVal(1), WasmVal(2), WasmVal(3)}; result_interpreted = testing::InterpretWasmModule( - i_isolate, &interpreter_thrower, module.get(), 0, args, + i_isolate, &interpreter_thrower, module.get(), wire_bytes, 0, args, &possible_nondeterminism); } ErrorThrower compiler_thrower(i_isolate, "Compiler"); v8::internal::Handle<v8::internal::JSObject> instance = testing::InstantiateModuleForTesting(i_isolate, &compiler_thrower, - module.get()); - + module.get(), wire_bytes); + // Restore the flag. + v8::internal::FLAG_wasm_code_fuzzer_gen_test = generate_test; if (!interpreter_thrower.error()) { CHECK(!instance.is_null()); } else { |