| // 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/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; |
| WGPUProcDeviceCreateSwapChain sOriginalDeviceCreateSwapChain = nullptr; |
| |
| bool sCommandsComplete = false; |
| |
| WGPUSwapChain ErrorDeviceCreateSwapChain(WGPUDevice device, |
| WGPUSurface surface, |
| const WGPUSwapChainDescriptor*) { |
| WGPUSwapChainDescriptor desc = {}; |
| // A 0 implementation will trigger a swapchain creation error. |
| desc.implementation = 0; |
| return sOriginalDeviceCreateSwapChain(device, surface, &desc); |
| } |
| |
| } // 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>(); |
| sInstance->DiscoverDefaultAdapters(); |
| |
| return 0; |
| } |
| |
| int DawnWireServerFuzzer::Run(const uint8_t* data, |
| size_t size, |
| MakeDeviceFn MakeDevice, |
| 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); |
| } |
| |
| DawnProcTable procs = dawn::native::GetProcs(); |
| |
| // Swapchains receive a pointer to an implementation. The fuzzer will pass garbage in so we |
| // intercept calls to create swapchains and make sure they always return error swapchains. |
| // This is ok for fuzzing because embedders of dawn_wire would always define their own |
| // swapchain handling. |
| sOriginalDeviceCreateSwapChain = procs.deviceCreateSwapChain; |
| procs.deviceCreateSwapChain = ErrorDeviceCreateSwapChain; |
| |
| dawnProcSetProcs(&procs); |
| |
| wgpu::Device device = MakeDevice(sInstance.get()); |
| if (!device) { |
| // We should only ever fail device creation if an error was injected. |
| ASSERT(supportsErrorInjection); |
| return 0; |
| } |
| |
| 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->InjectDevice(device.Get(), 1, 0); |
| |
| wireServer->HandleCommands(reinterpret_cast<const char*>(data), size); |
| |
| // Wait for all previous commands before destroying the server. |
| // TODO(enga): Improve this when we improve/finalize how processing events happens. |
| { |
| device.GetQueue().OnSubmittedWorkDone( |
| 0u, [](WGPUQueueWorkDoneStatus, void*) { sCommandsComplete = true; }, nullptr); |
| while (!sCommandsComplete) { |
| device.Tick(); |
| utils::USleep(100); |
| } |
| } |
| |
| wireServer = nullptr; |
| return 0; |
| } |