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// Copyright 2021 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 <memory>
#include <utility>
#include <vector>
#include "dawn/dawn_proc.h"
#include "dawn/tests/DawnTest.h"
#include "dawn/utils/SystemUtils.h"
#include "dawn/utils/WGPUHelpers.h"
namespace dawn {
namespace {
class DeviceInitializationTest : public testing::Test {
protected:
void SetUp() override { dawnProcSetProcs(&native::GetProcs()); }
void TearDown() override { dawnProcSetProcs(nullptr); }
// Test that the device can still be used by testing a buffer copy.
void ExpectDeviceUsable(wgpu::Device device) {
wgpu::Buffer src =
utils::CreateBufferFromData<uint32_t>(device, wgpu::BufferUsage::CopySrc, {1, 2, 3, 4});
wgpu::Buffer dst = utils::CreateBufferFromData<uint32_t>(
device, wgpu::BufferUsage::CopyDst | wgpu::BufferUsage::MapRead, {0, 0, 0, 0});
wgpu::CommandEncoder encoder = device.CreateCommandEncoder();
encoder.CopyBufferToBuffer(src, 0, dst, 0, 4 * sizeof(uint32_t));
wgpu::CommandBuffer commands = encoder.Finish();
device.GetQueue().Submit(1, &commands);
bool done = false;
dst.MapAsync(
wgpu::MapMode::Read, 0, 4 * sizeof(uint32_t),
[](WGPUBufferMapAsyncStatus status, void* userdata) {
EXPECT_EQ(status, WGPUBufferMapAsyncStatus_Success);
*static_cast<bool*>(userdata) = true;
},
&done);
// Note: we can't actually test this if Tick moves over to
// wgpuInstanceProcessEvents. We can still test that object creation works
// without crashing.
while (!done) {
device.Tick();
utils::USleep(100);
}
const uint32_t* mapping = static_cast<const uint32_t*>(dst.GetConstMappedRange());
EXPECT_EQ(mapping[0], 1u);
EXPECT_EQ(mapping[1], 2u);
EXPECT_EQ(mapping[2], 3u);
EXPECT_EQ(mapping[3], 4u);
}
};
// Test that device operations are still valid if the reference to the instance
// is dropped.
TEST_F(DeviceInitializationTest, DeviceOutlivesInstance) {
// Get properties of all available adapters and then free the instance.
// We want to create a device on a fresh instance and adapter each time.
std::vector<wgpu::AdapterProperties> availableAdapterProperties;
{
auto instance = std::make_unique<native::Instance>();
instance->EnableAdapterBlocklist(false);
for (const native::Adapter& adapter : instance->EnumerateAdapters()) {
wgpu::AdapterProperties properties;
adapter.GetProperties(&properties);
if (properties.backendType == wgpu::BackendType::Null) {
continue;
}
availableAdapterProperties.push_back(properties);
}
}
for (const wgpu::AdapterProperties& desiredProperties : availableAdapterProperties) {
wgpu::Device device;
auto instance = std::make_unique<native::Instance>();
instance->EnableAdapterBlocklist(false);
for (native::Adapter& adapter : instance->EnumerateAdapters()) {
wgpu::AdapterProperties properties;
adapter.GetProperties(&properties);
if (properties.deviceID == desiredProperties.deviceID &&
properties.vendorID == desiredProperties.vendorID &&
properties.adapterType == desiredProperties.adapterType &&
properties.backendType == desiredProperties.backendType) {
// Create the device, destroy the instance, and break out of the loop.
device = wgpu::Device::Acquire(adapter.CreateDevice());
instance.reset();
break;
}
}
if (device) {
ExpectDeviceUsable(std::move(device));
}
}
}
// Test that it is still possible to create a device from an adapter after the reference to the
// instance is dropped.
TEST_F(DeviceInitializationTest, AdapterOutlivesInstance) {
// Get properties of all available adapters and then free the instance.
// We want to create a device on a fresh instance and adapter each time.
std::vector<wgpu::AdapterProperties> availableAdapterProperties;
{
auto instance = std::make_unique<native::Instance>();
instance->EnableAdapterBlocklist(false);
for (const native::Adapter& adapter : instance->EnumerateAdapters()) {
wgpu::AdapterProperties properties;
adapter.GetProperties(&properties);
if (properties.backendType == wgpu::BackendType::Null) {
continue;
}
// TODO(dawn:1705): Remove this once D3D11 backend is fully implemented.
if (properties.backendType == wgpu::BackendType::D3D11) {
continue;
}
availableAdapterProperties.push_back(properties);
}
}
for (const wgpu::AdapterProperties& desiredProperties : availableAdapterProperties) {
wgpu::Adapter adapter;
auto instance = std::make_unique<native::Instance>();
instance->EnableAdapterBlocklist(false);
// Save a pointer to the instance.
// It will only be valid as long as the instance is alive.
WGPUInstance unsafeInstancePtr = instance->Get();
for (native::Adapter& nativeAdapter : instance->EnumerateAdapters()) {
wgpu::AdapterProperties properties;
nativeAdapter.GetProperties(&properties);
if (properties.deviceID == desiredProperties.deviceID &&
properties.vendorID == desiredProperties.vendorID &&
properties.adapterType == desiredProperties.adapterType &&
properties.backendType == desiredProperties.backendType) {
// Save the adapter, and reset the instance.
// Check that the number of adapters before the reset is > 0, and after the reset
// is 0. Unsafe, but we assume the pointer is still valid since the adapter is
// holding onto the instance. The instance should have cleared all internal
// references to adapters when the last external ref is dropped.
adapter = wgpu::Adapter(nativeAdapter.Get());
EXPECT_GT(native::GetPhysicalDeviceCountForTesting(unsafeInstancePtr), 0u);
instance.reset();
EXPECT_EQ(native::GetPhysicalDeviceCountForTesting(unsafeInstancePtr), 0u);
break;
}
}
if (adapter) {
ExpectDeviceUsable(adapter.CreateDevice());
}
}
}
} // anonymous namespace
} // namespace dawn