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// Copyright 2018 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 "common/Constants.h"
#include "dawn_native/ShaderModule.h"
#include "tests/unittests/validation/ValidationTest.h"
#include "utils/WGPUHelpers.h"
#include <sstream>
class ShaderModuleValidationTest : public ValidationTest {};
// Test case with a simpler shader that should successfully be created
TEST_F(ShaderModuleValidationTest, CreationSuccess) {
const char* shader = R"(
OpCapability Shader
%1 = OpExtInstImport "GLSL.std.450"
OpMemoryModel Logical GLSL450
OpEntryPoint Fragment %main "main" %fragColor
OpExecutionMode %main OriginUpperLeft
OpSource GLSL 450
OpSourceExtension "GL_GOOGLE_cpp_style_line_directive"
OpSourceExtension "GL_GOOGLE_include_directive"
OpName %main "main"
OpName %fragColor "fragColor"
OpDecorate %fragColor Location 0
%void = OpTypeVoid
%3 = OpTypeFunction %void
%float = OpTypeFloat 32
%v4float = OpTypeVector %float 4
%_ptr_Output_v4float = OpTypePointer Output %v4float
%fragColor = OpVariable %_ptr_Output_v4float Output
%float_1 = OpConstant %float 1
%float_0 = OpConstant %float 0
%12 = OpConstantComposite %v4float %float_1 %float_0 %float_0 %float_1
%main = OpFunction %void None %3
%5 = OpLabel
OpStore %fragColor %12
OpReturn
OpFunctionEnd)";
utils::CreateShaderModuleFromASM(device, shader);
}
// Tests that if the output location exceeds kMaxColorAttachments the fragment shader will fail to
// be compiled.
TEST_F(ShaderModuleValidationTest, FragmentOutputLocationExceedsMaxColorAttachments) {
std::ostringstream stream;
stream << "[[stage(fragment)]] fn main() -> [[location(" << kMaxColorAttachments
<< R"()]] vec4<f32> {
return vec4<f32>(0.0, 1.0, 0.0, 1.0);
})";
ASSERT_DEVICE_ERROR(utils::CreateShaderModule(device, stream.str().c_str()));
}
// Test that it is invalid to create a shader module with no chained descriptor. (It must be
// WGSL or SPIRV, not empty)
TEST_F(ShaderModuleValidationTest, NoChainedDescriptor) {
wgpu::ShaderModuleDescriptor desc = {};
ASSERT_DEVICE_ERROR(device.CreateShaderModule(&desc));
}
// Test that it is not allowed to use combined texture and sampler.
TEST_F(ShaderModuleValidationTest, CombinedTextureAndSampler) {
// SPIR-V ASM produced by glslang for the following fragment shader:
//
// #version 450
// layout(set = 0, binding = 0) uniform sampler2D tex;
// void main () {}
//
// Note that the following defines an interface combined texture/sampler which is not allowed
// in Dawn / WebGPU.
//
// %8 = OpTypeSampledImage %7
// %_ptr_UniformConstant_8 = OpTypePointer UniformConstant %8
// %tex = OpVariable %_ptr_UniformConstant_8 UniformConstant
const char* shader = R"(
OpCapability Shader
%1 = OpExtInstImport "GLSL.std.450"
OpMemoryModel Logical GLSL450
OpEntryPoint Fragment %main "main"
OpExecutionMode %main OriginUpperLeft
OpSource GLSL 450
OpName %main "main"
OpName %tex "tex"
OpDecorate %tex DescriptorSet 0
OpDecorate %tex Binding 0
%void = OpTypeVoid
%3 = OpTypeFunction %void
%float = OpTypeFloat 32
%7 = OpTypeImage %float 2D 0 0 0 1 Unknown
%8 = OpTypeSampledImage %7
%_ptr_UniformConstant_8 = OpTypePointer UniformConstant %8
%tex = OpVariable %_ptr_UniformConstant_8 UniformConstant
%main = OpFunction %void None %3
%5 = OpLabel
OpReturn
OpFunctionEnd
)";
ASSERT_DEVICE_ERROR(utils::CreateShaderModuleFromASM(device, shader));
}
// Test that it is not allowed to declare a multisampled-array interface texture.
// TODO(enga): Also test multisampled cube, cube array, and 3D. These have no GLSL keywords.
TEST_F(ShaderModuleValidationTest, MultisampledArrayTexture) {
// SPIR-V ASM produced by glslang for the following fragment shader:
//
// #version 450
// layout(set=0, binding=0) uniform texture2DMSArray tex;
// void main () {}}
//
// Note that the following defines an interface array multisampled texture which is not allowed
// in Dawn / WebGPU.
//
// %7 = OpTypeImage %float 2D 0 1 1 1 Unknown
// %_ptr_UniformConstant_7 = OpTypePointer UniformConstant %7
// %tex = OpVariable %_ptr_UniformConstant_7 UniformConstant
const char* shader = R"(
OpCapability Shader
%1 = OpExtInstImport "GLSL.std.450"
OpMemoryModel Logical GLSL450
OpEntryPoint Fragment %main "main"
OpExecutionMode %main OriginUpperLeft
OpSource GLSL 450
OpName %main "main"
OpName %tex "tex"
OpDecorate %tex DescriptorSet 0
OpDecorate %tex Binding 0
%void = OpTypeVoid
%3 = OpTypeFunction %void
%float = OpTypeFloat 32
%7 = OpTypeImage %float 2D 0 1 1 1 Unknown
%_ptr_UniformConstant_7 = OpTypePointer UniformConstant %7
%tex = OpVariable %_ptr_UniformConstant_7 UniformConstant
%main = OpFunction %void None %3
%5 = OpLabel
OpReturn
OpFunctionEnd
)";
ASSERT_DEVICE_ERROR(utils::CreateShaderModuleFromASM(device, shader));
}
// Tests that shader module compilation messages can be queried.
TEST_F(ShaderModuleValidationTest, GetCompilationMessages) {
// This test works assuming ShaderModule is backed by a dawn_native::ShaderModuleBase, which
// is not the case on the wire.
DAWN_SKIP_TEST_IF(UsesWire());
wgpu::ShaderModule shaderModule = utils::CreateShaderModule(device, R"(
[[stage(fragment)]] fn main() -> [[location(0)]] vec4<f32> {
return vec4<f32>(0.0, 1.0, 0.0, 1.0);
})");
dawn_native::ShaderModuleBase* shaderModuleBase =
reinterpret_cast<dawn_native::ShaderModuleBase*>(shaderModule.Get());
dawn_native::OwnedCompilationMessages* messages = shaderModuleBase->GetCompilationMessages();
messages->ClearMessages();
messages->AddMessageForTesting("Info Message");
messages->AddMessageForTesting("Warning Message", wgpu::CompilationMessageType::Warning);
messages->AddMessageForTesting("Error Message", wgpu::CompilationMessageType::Error, 3, 4);
messages->AddMessageForTesting("Complete Message", wgpu::CompilationMessageType::Info, 3, 4, 5,
6);
auto callback = [](WGPUCompilationInfoRequestStatus status, const WGPUCompilationInfo* info,
void* userdata) {
ASSERT_EQ(WGPUCompilationInfoRequestStatus_Success, status);
ASSERT_NE(nullptr, info);
ASSERT_EQ(4u, info->messageCount);
const WGPUCompilationMessage* message = &info->messages[0];
ASSERT_STREQ("Info Message", message->message);
ASSERT_EQ(WGPUCompilationMessageType_Info, message->type);
ASSERT_EQ(0u, message->lineNum);
ASSERT_EQ(0u, message->linePos);
message = &info->messages[1];
ASSERT_STREQ("Warning Message", message->message);
ASSERT_EQ(WGPUCompilationMessageType_Warning, message->type);
ASSERT_EQ(0u, message->lineNum);
ASSERT_EQ(0u, message->linePos);
message = &info->messages[2];
ASSERT_STREQ("Error Message", message->message);
ASSERT_EQ(WGPUCompilationMessageType_Error, message->type);
ASSERT_EQ(3u, message->lineNum);
ASSERT_EQ(4u, message->linePos);
message = &info->messages[3];
ASSERT_STREQ("Complete Message", message->message);
ASSERT_EQ(WGPUCompilationMessageType_Info, message->type);
ASSERT_EQ(3u, message->lineNum);
ASSERT_EQ(4u, message->linePos);
ASSERT_EQ(5u, message->offset);
ASSERT_EQ(6u, message->length);
};
shaderModule.GetCompilationInfo(callback, nullptr);
}
// Validate the maximum location of effective inter-stage variables cannot be greater than 14
// (kMaxInterStageShaderComponents / 4 - 1).
TEST_F(ShaderModuleValidationTest, MaximumShaderIOLocations) {
auto generateShaderForTest = [](uint32_t maximumOutputLocation, wgpu::ShaderStage shaderStage) {
std::ostringstream stream;
stream << "struct ShaderIO {" << std::endl;
for (uint32_t location = 1; location <= maximumOutputLocation; ++location) {
stream << "[[location(" << location << ")]] var" << location << ": f32;" << std::endl;
}
switch (shaderStage) {
case wgpu::ShaderStage::Vertex: {
stream << R"(
[[builtin(position)]] pos: vec4<f32>;
};
[[stage(vertex)]] fn main() -> ShaderIO {
var shaderIO : ShaderIO;
shaderIO.pos = vec4<f32>(0.0, 0.0, 0.0, 1.0);
return shaderIO;
})";
} break;
case wgpu::ShaderStage::Fragment: {
stream << R"(
};
[[stage(fragment)]] fn main(shaderIO: ShaderIO) -> [[location(0)]] vec4<f32> {
return vec4<f32>(0.0, 0.0, 0.0, 1.0);
})";
} break;
case wgpu::ShaderStage::Compute:
default:
UNREACHABLE();
}
return stream.str();
};
constexpr uint32_t kMaxInterShaderIOLocation = kMaxInterStageShaderComponents / 4 - 1;
// It is allowed to create a shader module with the maximum active vertex output location == 14;
{
std::string vertexShader =
generateShaderForTest(kMaxInterShaderIOLocation, wgpu::ShaderStage::Vertex);
utils::CreateShaderModule(device, vertexShader.c_str());
}
// It isn't allowed to create a shader module with the maximum active vertex output location >
// 14;
{
std::string vertexShader =
generateShaderForTest(kMaxInterShaderIOLocation + 1, wgpu::ShaderStage::Vertex);
ASSERT_DEVICE_ERROR(utils::CreateShaderModule(device, vertexShader.c_str()));
}
// It is allowed to create a shader module with the maximum active fragment input location ==
// 14;
{
std::string fragmentShader =
generateShaderForTest(kMaxInterShaderIOLocation, wgpu::ShaderStage::Fragment);
utils::CreateShaderModule(device, fragmentShader.c_str());
}
// It is allowed to create a shader module with the maximum active vertex output location > 14;
{
std::string fragmentShader =
generateShaderForTest(kMaxInterShaderIOLocation + 1, wgpu::ShaderStage::Fragment);
ASSERT_DEVICE_ERROR(utils::CreateShaderModule(device, fragmentShader.c_str()));
}
}
// Validate the maximum number of total inter-stage user-defined variable component count and
// built-in variables cannot exceed kMaxInterStageShaderComponents.
TEST_F(ShaderModuleValidationTest, MaximumInterStageShaderComponents) {
auto generateShaderForTest = [](uint32_t totalUserDefinedInterStageShaderComponentCount,
wgpu::ShaderStage shaderStage,
const char* builtInDeclarations) {
std::ostringstream stream;
stream << "struct ShaderIO {" << std::endl << builtInDeclarations << std::endl;
uint32_t vec4InputLocations = totalUserDefinedInterStageShaderComponentCount / 4;
for (uint32_t location = 0; location < vec4InputLocations; ++location) {
stream << "[[location(" << location << ")]] var" << location << ": vec4<f32>;"
<< std::endl;
}
uint32_t lastComponentCount = totalUserDefinedInterStageShaderComponentCount % 4;
if (lastComponentCount > 0) {
stream << "[[location(" << vec4InputLocations << ")]] var" << vec4InputLocations
<< ": ";
if (lastComponentCount == 1) {
stream << "f32;";
} else {
stream << " vec" << lastComponentCount << "<f32>;";
}
stream << std::endl;
}
switch (shaderStage) {
case wgpu::ShaderStage::Vertex: {
stream << R"(
[[builtin(position)]] pos: vec4<f32>;
};
[[stage(vertex)]] fn main() -> ShaderIO {
var shaderIO : ShaderIO;
shaderIO.pos = vec4<f32>(0.0, 0.0, 0.0, 1.0);
return shaderIO;
})";
} break;
case wgpu::ShaderStage::Fragment: {
stream << R"(
};
[[stage(fragment)]] fn main(shaderIO: ShaderIO) -> [[location(0)]] vec4<f32> {
return vec4<f32>(0.0, 0.0, 0.0, 1.0);
})";
} break;
case wgpu::ShaderStage::Compute:
default:
UNREACHABLE();
}
return stream.str();
};
// Verify when there is no input builtin variable in a fragment shader, the total user-defined
// input component count must be less than kMaxInterStageShaderComponents.
{
constexpr uint32_t kInterStageShaderComponentCount = kMaxInterStageShaderComponents;
std::string correctFragmentShader =
generateShaderForTest(kInterStageShaderComponentCount, wgpu::ShaderStage::Fragment, "");
utils::CreateShaderModule(device, correctFragmentShader.c_str());
std::string errorFragmentShader = generateShaderForTest(kInterStageShaderComponentCount + 1,
wgpu::ShaderStage::Fragment, "");
ASSERT_DEVICE_ERROR(utils::CreateShaderModule(device, errorFragmentShader.c_str()));
}
// [[position]] should be counted into the maximum inter-stage component count.
// Note that in vertex shader we always have [[position]] so we don't need to specify it
// again in the parameter "builtInDeclarations" of generateShaderForTest().
{
constexpr uint32_t kInterStageShaderComponentCount = kMaxInterStageShaderComponents - 4;
std::string vertexShader =
generateShaderForTest(kInterStageShaderComponentCount, wgpu::ShaderStage::Vertex, "");
utils::CreateShaderModule(device, vertexShader.c_str());
std::string fragmentShader =
generateShaderForTest(kInterStageShaderComponentCount, wgpu::ShaderStage::Fragment,
"[[builtin(position)]] fragCoord: vec4<f32>;");
utils::CreateShaderModule(device, fragmentShader.c_str());
}
{
constexpr uint32_t kInterStageShaderComponentCount = kMaxInterStageShaderComponents - 3;
std::string vertexShader =
generateShaderForTest(kInterStageShaderComponentCount, wgpu::ShaderStage::Vertex, "");
ASSERT_DEVICE_ERROR(utils::CreateShaderModule(device, vertexShader.c_str()));
std::string fragmentShader =
generateShaderForTest(kInterStageShaderComponentCount, wgpu::ShaderStage::Fragment,
"[[builtin(position)]] fragCoord: vec4<f32>;");
ASSERT_DEVICE_ERROR(utils::CreateShaderModule(device, fragmentShader.c_str()));
}
// [[front_facing]] should be counted into the maximum inter-stage component count.
{
const char* builtinDeclaration = "[[builtin(front_facing)]] frontFacing : bool;";
{
std::string fragmentShader =
generateShaderForTest(kMaxInterStageShaderComponents - 1,
wgpu::ShaderStage::Fragment, builtinDeclaration);
utils::CreateShaderModule(device, fragmentShader.c_str());
}
{
std::string fragmentShader = generateShaderForTest(
kMaxInterStageShaderComponents, wgpu::ShaderStage::Fragment, builtinDeclaration);
ASSERT_DEVICE_ERROR(utils::CreateShaderModule(device, fragmentShader.c_str()));
}
}
// [[sample_index]] should be counted into the maximum inter-stage component count.
{
const char* builtinDeclaration = "[[builtin(sample_index)]] sampleIndex: u32;";
{
std::string fragmentShader =
generateShaderForTest(kMaxInterStageShaderComponents - 1,
wgpu::ShaderStage::Fragment, builtinDeclaration);
utils::CreateShaderModule(device, fragmentShader.c_str());
}
{
std::string fragmentShader = generateShaderForTest(
kMaxInterStageShaderComponents, wgpu::ShaderStage::Fragment, builtinDeclaration);
ASSERT_DEVICE_ERROR(utils::CreateShaderModule(device, fragmentShader.c_str()));
}
}
// [[sample_mask]] should be counted into the maximum inter-stage component count.
{
const char* builtinDeclaration = "[[builtin(front_facing)]] frontFacing : bool;";
{
std::string fragmentShader =
generateShaderForTest(kMaxInterStageShaderComponents - 1,
wgpu::ShaderStage::Fragment, builtinDeclaration);
utils::CreateShaderModule(device, fragmentShader.c_str());
}
{
std::string fragmentShader = generateShaderForTest(
kMaxInterStageShaderComponents, wgpu::ShaderStage::Fragment, builtinDeclaration);
ASSERT_DEVICE_ERROR(utils::CreateShaderModule(device, fragmentShader.c_str()));
}
}
}
// Tests that we validate workgroup size limits.
TEST_F(ShaderModuleValidationTest, ComputeWorkgroupSizeLimits) {
DAWN_SKIP_TEST_IF(!HasToggleEnabled("use_tint_generator"));
auto MakeShaderWithWorkgroupSize = [this](uint32_t x, uint32_t y, uint32_t z) {
std::ostringstream ss;
ss << "[[stage(compute), workgroup_size(" << x << "," << y << "," << z
<< ")]] fn main() {}";
utils::CreateShaderModule(device, ss.str().c_str());
};
MakeShaderWithWorkgroupSize(1, 1, 1);
MakeShaderWithWorkgroupSize(kMaxComputeWorkgroupSizeX, 1, 1);
MakeShaderWithWorkgroupSize(1, kMaxComputeWorkgroupSizeY, 1);
MakeShaderWithWorkgroupSize(1, 1, kMaxComputeWorkgroupSizeZ);
ASSERT_DEVICE_ERROR(MakeShaderWithWorkgroupSize(kMaxComputeWorkgroupSizeX + 1, 1, 1));
ASSERT_DEVICE_ERROR(MakeShaderWithWorkgroupSize(1, kMaxComputeWorkgroupSizeY + 1, 1));
ASSERT_DEVICE_ERROR(MakeShaderWithWorkgroupSize(1, 1, kMaxComputeWorkgroupSizeZ + 1));
// No individual dimension exceeds its limit, but the combined size should definitely exceed the
// total invocation limit.
ASSERT_DEVICE_ERROR(MakeShaderWithWorkgroupSize(
kMaxComputeWorkgroupSizeX, kMaxComputeWorkgroupSizeY, kMaxComputeWorkgroupSizeZ));
}
// Tests that we validate workgroup storage size limits.
TEST_F(ShaderModuleValidationTest, ComputeWorkgroupStorageSizeLimits) {
DAWN_SKIP_TEST_IF(!HasToggleEnabled("use_tint_generator"));
constexpr uint32_t kVec4Size = 16;
constexpr uint32_t kMaxVec4Count = kMaxComputeWorkgroupStorageSize / kVec4Size;
constexpr uint32_t kMat4Size = 64;
constexpr uint32_t kMaxMat4Count = kMaxComputeWorkgroupStorageSize / kMat4Size;
auto MakeShaderWithWorkgroupStorage = [this](uint32_t vec4_count, uint32_t mat4_count) {
std::ostringstream ss;
std::ostringstream body;
if (vec4_count > 0) {
ss << "var<workgroup> vec4_data: array<vec4<f32>, " << vec4_count << ">;";
body << "ignore(vec4_data);";
}
if (mat4_count > 0) {
ss << "var<workgroup> mat4_data: array<mat4x4<f32>, " << mat4_count << ">;";
body << "ignore(mat4_data);";
}
ss << "[[stage(compute), workgroup_size(1)]] fn main() { " << body.str() << " }";
utils::CreateShaderModule(device, ss.str().c_str());
};
MakeShaderWithWorkgroupStorage(1, 1);
MakeShaderWithWorkgroupStorage(kMaxVec4Count, 0);
MakeShaderWithWorkgroupStorage(0, kMaxMat4Count);
MakeShaderWithWorkgroupStorage(kMaxVec4Count - 4, 1);
MakeShaderWithWorkgroupStorage(4, kMaxMat4Count - 1);
ASSERT_DEVICE_ERROR(MakeShaderWithWorkgroupStorage(kMaxVec4Count + 1, 0));
ASSERT_DEVICE_ERROR(MakeShaderWithWorkgroupStorage(kMaxVec4Count - 3, 1));
ASSERT_DEVICE_ERROR(MakeShaderWithWorkgroupStorage(0, kMaxMat4Count + 1));
ASSERT_DEVICE_ERROR(MakeShaderWithWorkgroupStorage(4, kMaxMat4Count));
}