70c6830795
The new fuzzer takes the fuzzer input as module bytes and compiles them with WebAssembly asynchronous compilation. R=mtrofin@chromium.org Change-Id: I9740edec68e26c04d011d85c68521e340be13c4c Reviewed-on: https://chromium-review.googlesource.com/506156 Commit-Queue: Andreas Haas <ahaas@chromium.org> Reviewed-by: Mircea Trofin <mtrofin@chromium.org> Cr-Commit-Position: refs/heads/master@{#45912}
123 lines
4.4 KiB
C++
123 lines
4.4 KiB
C++
// Copyright 2017 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/v8.h"
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#include "src/factory.h"
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#include "src/isolate-inl.h"
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#include "src/isolate.h"
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#include "src/objects-inl.h"
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#include "src/objects.h"
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#include "src/wasm/wasm-module.h"
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#include "test/common/wasm/flag-utils.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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using namespace v8::internal;
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using namespace v8::internal::wasm;
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using namespace v8::internal::wasm::testing;
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#define ASSIGN(type, var, expr) \
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v8::Local<type> var; \
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do { \
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if (!expr.ToLocal(&var)) { \
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DCHECK(i_isolate->has_scheduled_exception()); \
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return 0; \
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} else { \
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DCHECK(!i_isolate->has_scheduled_exception()); \
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} \
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} while (false)
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namespace v8 {
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namespace internal {
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class WasmModuleObject;
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}
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}
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namespace {
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// We need this helper function because we cannot use
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// Handle<WasmModuleObject>::cast here. To use this function we would have to
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// mark it with V8_EXPORT_PRIVATE, which is quite ugly in this case.
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Handle<WasmModuleObject> ToWasmModuleObjectUnchecked(Handle<Object> that) {
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return handle(reinterpret_cast<WasmModuleObject*>(*that));
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}
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}
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void InstantiateCallback(const v8::FunctionCallbackInfo<v8::Value>& args) {
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DCHECK_GE(args.Length(), 1);
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v8::Isolate* isolate = args.GetIsolate();
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v8::MicrotasksScope does_not_run_microtasks(
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isolate, v8::MicrotasksScope::kDoNotRunMicrotasks);
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v8::HandleScope scope(isolate);
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v8::Local<v8::Value> module = args[0];
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i::Isolate* i_isolate = reinterpret_cast<i::Isolate*>(isolate);
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ErrorThrower thrower(i_isolate, "WebAssembly Instantiation");
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i::Handle<i::WasmModuleObject> module_obj = ToWasmModuleObjectUnchecked(
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v8::Utils::OpenHandle(v8::Object::Cast(*module)));
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i::MaybeHandle<WasmInstanceObject> maybe_instance =
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i::wasm::SyncInstantiate(i_isolate, &thrower, module_obj,
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Handle<JSReceiver>::null(), // imports
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MaybeHandle<JSArrayBuffer>()); // memory
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Handle<WasmInstanceObject> instance;
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if (!maybe_instance.ToHandle(&instance)) {
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return;
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}
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RunWasmModuleForTesting(i_isolate, instance, 0, nullptr, kWasmOrigin);
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}
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extern "C" int LLVMFuzzerTestOneInput(const uint8_t* data, size_t size) {
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v8::internal::FlagScope<bool> turn_on_async_compile(
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&v8::internal::FLAG_wasm_async_compilation, true);
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v8::internal::FlagScope<uint32_t> max_mem_flag_scope(
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&v8::internal::FLAG_wasm_max_mem_pages, 32);
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v8::internal::FlagScope<uint32_t> max_table_size_scope(
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&v8::internal::FLAG_wasm_max_table_size, 100);
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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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v8::internal::Isolate* i_isolate =
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reinterpret_cast<v8::internal::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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HandleScope internal_scope(i_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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v8::internal::wasm::testing::SetupIsolateForWasmModule(i_isolate);
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// Get the promise for async compilation.
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ASSIGN(v8::Promise::Resolver, resolver,
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v8::Promise::Resolver::New(support->GetContext()));
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v8::Local<v8::Promise> promise = resolver->GetPromise();
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AsyncCompile(i_isolate, v8::Utils::OpenHandle(*promise),
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ModuleWireBytes(data, data + size));
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ASSIGN(v8::Function, instantiate_impl,
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v8::Function::New(support->GetContext(), &InstantiateCallback,
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v8::Undefined(isolate)));
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ASSIGN(v8::Promise, result,
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promise->Then(support->GetContext(), instantiate_impl));
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// Wait for the promise to resolve.
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while (result->State() == v8::Promise::kPending) {
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support->PumpMessageLoop(v8::platform::MessageLoopBehavior::kWaitForWork);
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isolate->RunMicrotasks();
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}
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return 0;
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}
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