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9d7cd9b864
PR-URL: https://github.com/nodejs/node/pull/54077 Reviewed-By: Jiawen Geng <technicalcute@gmail.com> Reviewed-By: Richard Lau <rlau@redhat.com> Reviewed-By: Joyee Cheung <joyeec9h3@gmail.com> Reviewed-By: Marco Ippolito <marcoippolito54@gmail.com>
87 lines
3.0 KiB
C++
87 lines
3.0 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 <limits.h>
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#include <stddef.h>
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#include <stdint.h>
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#include "include/libplatform/libplatform.h"
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#include "include/v8-context.h"
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#include "include/v8-exception.h"
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#include "include/v8-isolate.h"
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#include "include/v8-local-handle.h"
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#include "src/execution/isolate-inl.h"
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#include "src/wasm/wasm-engine.h"
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#include "src/wasm/wasm-feature-flags.h"
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#include "src/wasm/wasm-module.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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#include "test/fuzzer/wasm-fuzzer-common.h"
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namespace v8::internal::wasm::fuzzing {
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extern "C" int LLVMFuzzerTestOneInput(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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// We reduce the maximum memory size and table size of WebAssembly instances
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// to avoid OOMs in the fuzzer.
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v8_flags.wasm_max_mem_pages = 32;
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v8_flags.wasm_max_table_size = 100;
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// Disable lazy compilation to find compiler bugs easier.
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v8_flags.wasm_lazy_compilation = false;
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// Choose one of Liftoff or TurboFan, depending on the size of the input (we
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// can't use a dedicated byte from the input, because we want to be able to
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// pass Wasm modules unmodified to this fuzzer).
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v8_flags.liftoff = size & 1;
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Isolate* i_isolate = reinterpret_cast<Isolate*>(isolate);
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v8::Isolate::Scope isolate_scope(isolate);
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// Clear any exceptions from a prior run.
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if (i_isolate->has_exception()) {
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i_isolate->clear_exception();
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}
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v8::HandleScope handle_scope(isolate);
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v8::Context::Scope context_scope(support->GetContext());
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// We explicitly enable staged/experimental WebAssembly features here to
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// increase fuzzer coverage. For libfuzzer fuzzers it is not possible that the
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// fuzzer enables the flag by itself.
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EnableExperimentalWasmFeatures(isolate);
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v8::TryCatch try_catch(isolate);
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testing::SetupIsolateForWasmModule(i_isolate);
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ModuleWireBytes wire_bytes(data, data + size);
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HandleScope scope(i_isolate);
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ErrorThrower thrower(i_isolate, "wasm fuzzer");
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Handle<WasmModuleObject> module_object;
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auto enabled_features = WasmEnabledFeatures::FromIsolate(i_isolate);
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bool compiles = GetWasmEngine()
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->SyncCompile(i_isolate, enabled_features,
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CompileTimeImports{}, &thrower, wire_bytes)
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.ToHandle(&module_object);
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if (v8_flags.wasm_fuzzer_gen_test) {
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GenerateTestCase(i_isolate, wire_bytes, compiles);
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}
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if (compiles) {
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ExecuteAgainstReference(i_isolate, module_object,
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kDefaultMaxFuzzerExecutedInstructions);
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}
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// Pump the message loop and run micro tasks, e.g. GC finalization tasks.
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support->PumpMessageLoop(v8::platform::MessageLoopBehavior::kDoNotWait);
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isolate->PerformMicrotaskCheckpoint();
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return 0;
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}
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} // namespace v8::internal::wasm::fuzzing
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