02becb1614
As described in https://docs.google.com/document/d/1hB8mpWmzmtaxZ8PuJEkAWLwFqXTjrw7mJ3Ge9W1dB4E, we want to enable --wasm-staging for libfuzzer fuzzers to increase test coverage of new feature implementations. As discussed in https://docs.google.com/a/chromium.org/document/d/1hB8mpWmzmtaxZ8PuJEkAWLwFqXTjrw7mJ3Ge9W1dB4E/edit?disco=AAAADPrjhdA, this has to be done in our implementations manually. R=thibaudm@chromium.org Bug: v8:9601 Change-Id: Iab35af75bb71b6fca697ab7e4ac37b04e1d6da35 Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/1768581 Reviewed-by: Thibaud Michaud <thibaudm@chromium.org> Commit-Queue: Andreas Haas <ahaas@chromium.org> Cr-Commit-Position: refs/heads/master@{#63392}
71 lines
2.6 KiB
C++
71 lines
2.6 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/v8.h"
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#include "src/execution/isolate-inl.h"
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#include "src/heap/factory.h"
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#include "src/objects/objects-inl.h"
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#include "src/wasm/wasm-engine.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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#include "test/fuzzer/wasm-fuzzer-common.h"
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namespace i = v8::internal;
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extern "C" int LLVMFuzzerTestOneInput(const uint8_t* data, size_t size) {
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// We explicitly enable staged WebAssembly features here to increase fuzzer
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// coverage. For libfuzzer fuzzers it is not possible that the fuzzer enables
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// the flag by itself.
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i::FlagScope<bool> enable_staged_features(&i::FLAG_wasm_staging, true);
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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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i::FlagScope<uint32_t> max_mem_flag_scope(&i::FLAG_wasm_max_mem_pages, 32);
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i::FlagScope<uint32_t> max_table_size_scope(&i::FLAG_wasm_max_table_size,
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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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i::Isolate* i_isolate = reinterpret_cast<i::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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i::wasm::testing::SetupIsolateForWasmModule(i_isolate);
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i::wasm::ModuleWireBytes wire_bytes(data, data + size);
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i::HandleScope scope(i_isolate);
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i::wasm::ErrorThrower thrower(i_isolate, "wasm fuzzer");
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i::Handle<i::WasmModuleObject> module_object;
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auto enabled_features = i::wasm::WasmFeaturesFromIsolate(i_isolate);
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bool compiles =
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i_isolate->wasm_engine()
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->SyncCompile(i_isolate, enabled_features, &thrower, wire_bytes)
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.ToHandle(&module_object);
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if (i::FLAG_wasm_fuzzer_gen_test) {
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i::wasm::fuzzer::GenerateTestCase(i_isolate, wire_bytes, compiles);
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}
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if (compiles) {
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i::wasm::fuzzer::InterpretAndExecuteModule(i_isolate, module_object);
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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->RunMicrotasks();
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return 0;
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}
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