bf9196493f
This violates the style guide, and causes problems for jumbo builds. R=ahaas@chromium.org CC=mostynb@opera.com Bug: chromium:746958 Change-Id: Ic583c41b94bfd9ecdb31a9ccadb2e842861fe7f4 Reviewed-on: https://chromium-review.googlesource.com/647710 Reviewed-by: Ben Titzer <titzer@chromium.org> Commit-Queue: Clemens Hammacher <clemensh@chromium.org> Cr-Commit-Position: refs/heads/master@{#47774}
215 lines
7.3 KiB
C++
215 lines
7.3 KiB
C++
// Copyright 2016 the V8 project authors. All rights reserved.
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// Use of this source code is governed by a BSD-style license that can be
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// found in the LICENSE file.
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#include "test/fuzzer/wasm-fuzzer-common.h"
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#include "include/v8.h"
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#include "src/isolate.h"
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#include "src/objects-inl.h"
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#include "src/wasm/wasm-module-builder.h"
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#include "src/wasm/wasm-module.h"
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#include "src/zone/accounting-allocator.h"
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#include "src/zone/zone.h"
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#include "test/common/wasm/wasm-module-runner.h"
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#include "test/fuzzer/fuzzer-support.h"
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#define WASM_CODE_FUZZER_HASH_SEED 83
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namespace v8 {
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namespace internal {
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namespace wasm {
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namespace fuzzer {
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static const char* kNameString = "name";
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static const size_t kNameStringLength = 4;
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int FuzzWasmSection(SectionCode section, const uint8_t* data, size_t size) {
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v8_fuzzer::FuzzerSupport* support = v8_fuzzer::FuzzerSupport::Get();
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v8::Isolate* isolate = support->GetIsolate();
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i::Isolate* i_isolate = reinterpret_cast<Isolate*>(isolate);
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// Clear any pending exceptions from a prior run.
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if (i_isolate->has_pending_exception()) {
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i_isolate->clear_pending_exception();
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}
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v8::Isolate::Scope isolate_scope(isolate);
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v8::HandleScope handle_scope(isolate);
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v8::Context::Scope context_scope(support->GetContext());
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v8::TryCatch try_catch(isolate);
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AccountingAllocator allocator;
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Zone zone(&allocator, ZONE_NAME);
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ZoneBuffer buffer(&zone);
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buffer.write_u32(kWasmMagic);
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buffer.write_u32(kWasmVersion);
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if (section == kNameSectionCode) {
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buffer.write_u8(kUnknownSectionCode);
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buffer.write_size(size + kNameStringLength + 1);
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buffer.write_u8(kNameStringLength);
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buffer.write(reinterpret_cast<const uint8_t*>(kNameString),
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kNameStringLength);
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buffer.write(data, size);
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} else {
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buffer.write_u8(section);
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buffer.write_size(size);
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buffer.write(data, size);
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}
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ErrorThrower thrower(i_isolate, "decoder");
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std::unique_ptr<const WasmModule> module(testing::DecodeWasmModuleForTesting(
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i_isolate, &thrower, buffer.begin(), buffer.end(), kWasmOrigin));
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return 0;
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}
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int WasmExecutionFuzzer::FuzzWasmModule(
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const uint8_t* data, size_t size) {
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// Save the flag so that we can change it and restore it later.
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bool generate_test = FLAG_wasm_code_fuzzer_gen_test;
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if (generate_test) {
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OFStream os(stdout);
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os << "// Copyright 2017 the V8 project authors. All rights reserved."
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<< std::endl;
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os << "// Use of this source code is governed by a BSD-style license that "
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"can be"
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<< std::endl;
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os << "// found in the LICENSE file." << std::endl;
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os << std::endl;
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os << "load(\"test/mjsunit/wasm/wasm-constants.js\");" << std::endl;
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os << "load(\"test/mjsunit/wasm/wasm-module-builder.js\");" << std::endl;
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os << std::endl;
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os << "(function() {" << std::endl;
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os << " var builder = new WasmModuleBuilder();" << std::endl;
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os << " builder.addMemory(16, 32, false);" << std::endl;
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os << " builder.addFunction(\"test\", kSig_i_iii)" << std::endl;
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os << " .addBodyWithEnd([" << std::endl;
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}
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v8_fuzzer::FuzzerSupport* support = v8_fuzzer::FuzzerSupport::Get();
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v8::Isolate* isolate = support->GetIsolate();
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i::Isolate* i_isolate = reinterpret_cast<Isolate*>(isolate);
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// Clear any pending exceptions from a prior run.
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if (i_isolate->has_pending_exception()) {
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i_isolate->clear_pending_exception();
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}
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v8::Isolate::Scope isolate_scope(isolate);
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v8::HandleScope handle_scope(isolate);
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v8::Context::Scope context_scope(support->GetContext());
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v8::TryCatch try_catch(isolate);
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HandleScope scope(i_isolate);
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AccountingAllocator allocator;
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Zone zone(&allocator, ZONE_NAME);
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ZoneBuffer buffer(&zone);
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int32_t num_args = 0;
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std::unique_ptr<WasmValue[]> interpreter_args;
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std::unique_ptr<Handle<Object>[]> compiler_args;
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if (!GenerateModule(i_isolate, &zone, data, size, buffer, num_args,
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interpreter_args, compiler_args)) {
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return 0;
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}
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testing::SetupIsolateForWasmModule(i_isolate);
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ErrorThrower interpreter_thrower(i_isolate, "Interpreter");
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ModuleWireBytes wire_bytes(buffer.begin(), buffer.end());
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MaybeHandle<WasmModuleObject> compiled_module =
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SyncCompile(i_isolate, &interpreter_thrower, wire_bytes);
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// Clear the flag so that the WebAssembly code is not printed twice.
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FLAG_wasm_code_fuzzer_gen_test = false;
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bool compiles = !compiled_module.is_null();
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if (generate_test) {
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OFStream os(stdout);
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os << " ])" << std::endl
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<< " .exportFunc();" << std::endl;
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if (compiles) {
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os << " var module = builder.instantiate();" << std::endl
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<< " module.exports.test(1, 2, 3);" << std::endl;
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} else {
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OFStream os(stdout);
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os << " assertThrows(function() { builder.instantiate(); });"
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<< std::endl;
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}
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os << "})();" << std::endl;
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}
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bool validates = SyncValidate(i_isolate, wire_bytes);
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if (compiles != validates) {
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uint32_t hash = StringHasher::HashSequentialString(
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data, static_cast<int>(size), WASM_CODE_FUZZER_HASH_SEED);
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V8_Fatal(__FILE__, __LINE__,
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"compiles != validates (%d vs %d); WasmCodeFuzzerHash=%x",
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compiles, validates, hash);
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}
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if (!compiles) return 0;
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int32_t result_interpreted;
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bool possible_nondeterminism = false;
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{
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MaybeHandle<WasmInstanceObject> interpreter_instance = SyncInstantiate(
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i_isolate, &interpreter_thrower, compiled_module.ToHandleChecked(),
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MaybeHandle<JSReceiver>(), MaybeHandle<JSArrayBuffer>());
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if (interpreter_thrower.error()) {
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return 0;
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}
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result_interpreted = testing::InterpretWasmModule(
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i_isolate, interpreter_instance.ToHandleChecked(), &interpreter_thrower,
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0, interpreter_args.get(), &possible_nondeterminism);
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}
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// Do not execute the generated code if the interpreter did not finished after
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// a bounded number of steps.
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if (interpreter_thrower.error()) {
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return 0;
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}
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int32_t result_compiled;
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{
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ErrorThrower compiler_thrower(i_isolate, "Compiler");
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MaybeHandle<WasmInstanceObject> compiled_instance = SyncInstantiate(
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i_isolate, &compiler_thrower, compiled_module.ToHandleChecked(),
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MaybeHandle<JSReceiver>(), MaybeHandle<JSArrayBuffer>());
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DCHECK(!compiler_thrower.error());
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result_compiled = testing::CallWasmFunctionForTesting(
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i_isolate, compiled_instance.ToHandleChecked(), &compiler_thrower,
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"main", num_args, compiler_args.get());
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}
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// The WebAssembly spec allows the sign bit of NaN to be non-deterministic.
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// This sign bit may cause result_interpreted to be different than
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// result_compiled. Therefore we do not check the equality of the results
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// if the execution may have produced a NaN at some point.
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if (possible_nondeterminism) return 0;
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if (result_interpreted == bit_cast<int32_t>(0xdeadbeef)) {
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CHECK(i_isolate->has_pending_exception());
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i_isolate->clear_pending_exception();
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} else {
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CHECK(!i_isolate->has_pending_exception());
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if (result_interpreted != result_compiled) {
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V8_Fatal(__FILE__, __LINE__, "WasmCodeFuzzerHash=%x",
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StringHasher::HashSequentialString(data, static_cast<int>(size),
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WASM_CODE_FUZZER_HASH_SEED));
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}
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}
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return 0;
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}
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} // namespace fuzzer
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} // namespace wasm
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} // namespace internal
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} // namespace v8
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