| // Copyright 2019 The Dawn Authors |
| // |
| // Licensed under the Apache License, Version 2.0 (the "License"); |
| // you may not use this file except in compliance with the License. |
| // You may obtain a copy of the License at |
| // |
| // http://www.apache.org/licenses/LICENSE-2.0 |
| // |
| // Unless required by applicable law or agreed to in writing, software |
| // distributed under the License is distributed on an "AS IS" BASIS, |
| // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| // See the License for the specific language governing permissions and |
| // limitations under the License. |
| |
| #include "dawn/fuzzers/DawnWireServerFuzzer.h" |
| |
| #include <fstream> |
| #include <memory> |
| #include <vector> |
| |
| #include "dawn/common/Assert.h" |
| #include "dawn/common/DynamicLib.h" |
| #include "dawn/common/Log.h" |
| #include "dawn/common/SystemUtils.h" |
| #include "dawn/dawn_proc.h" |
| #include "dawn/native/DawnNative.h" |
| #include "dawn/utils/SystemUtils.h" |
| #include "dawn/webgpu_cpp.h" |
| #include "dawn/wire/WireServer.h" |
| |
| namespace { |
| |
| class DevNull : public dawn::wire::CommandSerializer { |
| public: |
| size_t GetMaximumAllocationSize() const override { |
| // Some fuzzer bots have a 2GB allocation limit. Pick a value reasonably below that. |
| return 1024 * 1024 * 1024; |
| } |
| void* GetCmdSpace(size_t size) override { |
| if (size > buf.size()) { |
| buf.resize(size); |
| } |
| return buf.data(); |
| } |
| bool Flush() override { return true; } |
| |
| private: |
| std::vector<char> buf; |
| }; |
| |
| std::unique_ptr<dawn::native::Instance> sInstance; |
| static bool (*sAdapterSupported)(const dawn::native::Adapter&) = nullptr; |
| #if DAWN_PLATFORM_IS(WINDOWS) && defined(ADDRESS_SANITIZER) |
| static dawn::DynamicLib sVulkanLoader; |
| #endif |
| |
| } // namespace |
| |
| int DawnWireServerFuzzer::Initialize(int* argc, char*** argv) { |
| // TODO(crbug.com/1038952): The Instance must be static because destructing the vkInstance with |
| // Swiftshader crashes libFuzzer. When this is fixed, move this into Run so that error injection |
| // for adapter discovery can be fuzzed. |
| sInstance = std::make_unique<dawn::native::Instance>(); |
| |
| // TODO(crbug.com/1038952): Although we keep a static instance, when discovering default Vulkan |
| // adapters, if no adapter is found, the vulkan loader DLL will be loaded and then unloaded, |
| // resulting in ASAN false positives. We work around this by explicitly loading the loader |
| // without unloading it here. |
| #if DAWN_PLATFORM_IS(WINDOWS) && defined(ADDRESS_SANITIZER) |
| sVulkanLoader.Open(dawn::GetExecutableDirectory().value_or("") + "vulkan-1.dll"); |
| #endif |
| |
| sInstance->DiscoverDefaultAdapters(); |
| |
| return 0; |
| } |
| |
| int DawnWireServerFuzzer::Run(const uint8_t* data, |
| size_t size, |
| bool (*AdapterSupported)(const dawn::native::Adapter&), |
| bool supportsErrorInjection) { |
| // We require at least the injected error index. |
| if (size < sizeof(uint64_t)) { |
| return 0; |
| } |
| |
| // Get and consume the injected error index. |
| uint64_t injectedErrorIndex = *reinterpret_cast<const uint64_t*>(data); |
| data += sizeof(uint64_t); |
| size -= sizeof(uint64_t); |
| |
| if (supportsErrorInjection) { |
| dawn::native::EnableErrorInjector(); |
| |
| // Clear the error injector since it has the previous run's call counts. |
| dawn::native::ClearErrorInjector(); |
| |
| dawn::native::InjectErrorAt(injectedErrorIndex); |
| } |
| |
| sAdapterSupported = AdapterSupported; |
| |
| DawnProcTable procs = dawn::native::GetProcs(); |
| |
| // Override requestAdapter to find an adapter that the fuzzer supports. |
| procs.instanceRequestAdapter = [](WGPUInstance cInstance, |
| const WGPURequestAdapterOptions* options, |
| WGPURequestAdapterCallback callback, void* userdata) { |
| std::vector<dawn::native::Adapter> adapters = sInstance->GetAdapters(); |
| for (dawn::native::Adapter adapter : adapters) { |
| if (sAdapterSupported(adapter)) { |
| WGPUAdapter cAdapter = adapter.Get(); |
| dawn::native::GetProcs().adapterReference(cAdapter); |
| callback(WGPURequestAdapterStatus_Success, cAdapter, nullptr, userdata); |
| return; |
| } |
| } |
| callback(WGPURequestAdapterStatus_Unavailable, nullptr, "No supported adapter.", userdata); |
| }; |
| |
| dawnProcSetProcs(&procs); |
| |
| DevNull devNull; |
| dawn::wire::WireServerDescriptor serverDesc = {}; |
| serverDesc.procs = &procs; |
| serverDesc.serializer = &devNull; |
| |
| std::unique_ptr<dawn::wire::WireServer> wireServer(new dawn_wire::WireServer(serverDesc)); |
| wireServer->InjectInstance(sInstance->Get(), 1, 0); |
| wireServer->HandleCommands(reinterpret_cast<const char*>(data), size); |
| |
| // Flush remaining callbacks to avoid memory leaks. |
| // TODO(crbug.com/dawn/1712): DeviceNull's APITick() will always return true so cannot |
| // do a polling loop here. |
| dawn::native::InstanceProcessEvents(sInstance->Get()); |
| |
| // Note: Deleting the server will release all created objects. |
| // Deleted devices will wait for idle on destruction. |
| wireServer = nullptr; |
| return 0; |
| } |