a024ea4ba7
Fuzzers are executed in their own process, so instead of resetting flags after execution, we can just keep the flag values. This CL introduces a shared function to enable all staged features, without ever resetting the value. This fixes a data race. R=ahaas@chromium.org Bug: v8:10979 Change-Id: I82ea35b887841850edd8b394a3644cf8df1e3bf8 Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2449969 Commit-Queue: Clemens Backes <clemensb@chromium.org> Reviewed-by: Andreas Haas <ahaas@chromium.org> Cr-Commit-Position: refs/heads/master@{#70320}
72 lines
2.5 KiB
C++
72 lines
2.5 KiB
C++
// Copyright 2016 the V8 project authors. All rights reserved.
|
|
// Use of this source code is governed by a BSD-style license that can be
|
|
// found in the LICENSE file.
|
|
|
|
#include <limits.h>
|
|
#include <stddef.h>
|
|
#include <stdint.h>
|
|
|
|
#include "include/v8.h"
|
|
#include "src/execution/isolate-inl.h"
|
|
#include "src/heap/factory.h"
|
|
#include "src/objects/objects-inl.h"
|
|
#include "src/wasm/wasm-engine.h"
|
|
#include "src/wasm/wasm-feature-flags.h"
|
|
#include "src/wasm/wasm-module.h"
|
|
#include "test/common/wasm/flag-utils.h"
|
|
#include "test/common/wasm/wasm-module-runner.h"
|
|
#include "test/fuzzer/fuzzer-support.h"
|
|
#include "test/fuzzer/wasm-fuzzer-common.h"
|
|
|
|
namespace i = v8::internal;
|
|
|
|
extern "C" int LLVMFuzzerTestOneInput(const uint8_t* data, size_t size) {
|
|
// We explicitly enable staged WebAssembly features here to increase fuzzer
|
|
// coverage. For libfuzzer fuzzers it is not possible that the fuzzer enables
|
|
// the flag by itself.
|
|
i::wasm::fuzzer::OneTimeEnableStagedWasmFeatures();
|
|
|
|
// We reduce the maximum memory size and table size of WebAssembly instances
|
|
// to avoid OOMs in the fuzzer.
|
|
i::FLAG_wasm_max_mem_pages = 32;
|
|
i::FLAG_wasm_max_table_size = 100;
|
|
|
|
v8_fuzzer::FuzzerSupport* support = v8_fuzzer::FuzzerSupport::Get();
|
|
v8::Isolate* isolate = support->GetIsolate();
|
|
i::Isolate* i_isolate = reinterpret_cast<i::Isolate*>(isolate);
|
|
|
|
// Clear any pending exceptions from a prior run.
|
|
if (i_isolate->has_pending_exception()) {
|
|
i_isolate->clear_pending_exception();
|
|
}
|
|
|
|
v8::Isolate::Scope isolate_scope(isolate);
|
|
v8::HandleScope handle_scope(isolate);
|
|
v8::Context::Scope context_scope(support->GetContext());
|
|
v8::TryCatch try_catch(isolate);
|
|
i::wasm::testing::SetupIsolateForWasmModule(i_isolate);
|
|
i::wasm::ModuleWireBytes wire_bytes(data, data + size);
|
|
|
|
i::HandleScope scope(i_isolate);
|
|
i::wasm::ErrorThrower thrower(i_isolate, "wasm fuzzer");
|
|
i::Handle<i::WasmModuleObject> module_object;
|
|
auto enabled_features = i::wasm::WasmFeatures::FromIsolate(i_isolate);
|
|
bool compiles =
|
|
i_isolate->wasm_engine()
|
|
->SyncCompile(i_isolate, enabled_features, &thrower, wire_bytes)
|
|
.ToHandle(&module_object);
|
|
|
|
if (i::FLAG_wasm_fuzzer_gen_test) {
|
|
i::wasm::fuzzer::GenerateTestCase(i_isolate, wire_bytes, compiles);
|
|
}
|
|
|
|
if (compiles) {
|
|
i::wasm::fuzzer::InterpretAndExecuteModule(i_isolate, module_object);
|
|
}
|
|
|
|
// Pump the message loop and run micro tasks, e.g. GC finalization tasks.
|
|
support->PumpMessageLoop(v8::platform::MessageLoopBehavior::kDoNotWait);
|
|
isolate->PerformMicrotaskCheckpoint();
|
|
return 0;
|
|
}
|