Implement device.CreateErrorShaderModule()

This patch implements device.CreateErrorShaderModule() for Blink to
directly create an error shader module and insert validation and
compilation errors when anything wrong is detected.

Bug: dawn:1345
Test: dawn_unittests
Change-Id: I1415aaf0609febaff49c40ebbfedbbcefa2e5504
Reviewed-on: https://dawn-review.googlesource.com/c/dawn/+/134104
Commit-Queue: Jiawei Shao <jiawei.shao@intel.com>
Reviewed-by: Austin Eng <enga@chromium.org>
Kokoro: Kokoro <noreply+kokoro@google.com>
Reviewed-by: Corentin Wallez <cwallez@chromium.org>

dawn.json

@@ -1096,6 +1096,14 @@
                     {"name": "descriptor", "type": "shader module descriptor", "annotation": "const*"}
                 ]
             },
+            {
+                "name": "create error shader module",
+                "returns": "shader module",
+                "args": [
+                    {"name": "descriptor", "type": "shader module descriptor", "annotation": "const*"},
+                    {"name": "error message", "type": "char", "annotation": "const*", "length": "strlen"}
+                ]
+            },
             {
                 "name": "create swap chain",
                 "returns": "swap chain",

src/dawn/native/CompilationMessages.cpp

@@ -77,7 +77,7 @@ OwnedCompilationMessages::OwnedCompilationMessages() {
 
 OwnedCompilationMessages::~OwnedCompilationMessages() = default;
 
-void OwnedCompilationMessages::AddMessageForTesting(std::string message,
+void OwnedCompilationMessages::AddMessage(std::string message,
                                           wgpu::CompilationMessageType type,
                                           uint64_t lineNum,
                                           uint64_t linePos,

src/dawn/native/CompilationMessages.h

@@ -37,8 +37,7 @@ class OwnedCompilationMessages : public NonCopyable {
     OwnedCompilationMessages();
     ~OwnedCompilationMessages();
 
-    void AddMessageForTesting(
-        std::string message,
+    void AddMessage(std::string message,
                     wgpu::CompilationMessageType type = wgpu::CompilationMessageType::Info,
                     uint64_t lineNum = 0,
                     uint64_t linePos = 0,

src/dawn/native/Device.cpp

@@ -1248,6 +1248,21 @@ ShaderModuleBase* DeviceBase::APICreateShaderModule(const ShaderModuleDescriptor
 
     return result.Detach();
 }
+ShaderModuleBase* DeviceBase::APICreateErrorShaderModule(const ShaderModuleDescriptor* descriptor,
+                                                         const char* errorMessage) {
+    Ref<ShaderModuleBase> result =
+        ShaderModuleBase::MakeError(this, descriptor ? descriptor->label : nullptr);
+    std::unique_ptr<OwnedCompilationMessages> compilationMessages(
+        std::make_unique<OwnedCompilationMessages>());
+    compilationMessages->AddMessage(errorMessage, wgpu::CompilationMessageType::Error);
+    result->InjectCompilationMessages(std::move(compilationMessages));
+
+    std::unique_ptr<ErrorData> errorData =
+        DAWN_VALIDATION_ERROR("Error in calling %s.CreateShaderModule(%s).", this, descriptor);
+    ConsumeError(std::move(errorData));
+
+    return result.Detach();
+}
 SwapChainBase* DeviceBase::APICreateSwapChain(Surface* surface,
                                               const SwapChainDescriptor* descriptor) {
     Ref<SwapChainBase> result;

src/dawn/native/Device.h

@@ -285,6 +285,8 @@ class DeviceBase : public RefCountedWithExternalCount {
     ExternalTextureBase* APICreateExternalTexture(const ExternalTextureDescriptor* descriptor);
     SamplerBase* APICreateSampler(const SamplerDescriptor* descriptor);
     ShaderModuleBase* APICreateShaderModule(const ShaderModuleDescriptor* descriptor);
+    ShaderModuleBase* APICreateErrorShaderModule(const ShaderModuleDescriptor* descriptor,
+                                                 const char* errorMessage);
     SwapChainBase* APICreateSwapChain(Surface* surface, const SwapChainDescriptor* descriptor);
     TextureBase* APICreateTexture(const TextureDescriptor* descriptor);
 

src/dawn/tests/unittests/validation/ShaderModuleValidationTests.cpp

@@ -254,11 +254,10 @@ TEST_F(ShaderModuleValidationTest, GetCompilationMessages) {
     native::ShaderModuleBase* shaderModuleBase = native::FromAPI(shaderModule.Get());
     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);
+    messages->AddMessage("Info Message");
+    messages->AddMessage("Warning Message", wgpu::CompilationMessageType::Warning);
+    messages->AddMessage("Error Message", wgpu::CompilationMessageType::Error, 3, 4);
+    messages->AddMessage("Complete Message", wgpu::CompilationMessageType::Info, 3, 4, 5, 6);
 
     auto callback = [](WGPUCompilationInfoRequestStatus status, const WGPUCompilationInfo* info,
                        void* userdata) {
@@ -728,5 +727,34 @@ TEST_F(ShaderModuleValidationTest, SourceToCodeMemberDeprecation) {
                                                          native::FromAPI(codeShader.Get())));
 }
 
+// Test creating an error shader module with device.CreateErrorShaderModule()
+TEST_F(ShaderModuleValidationTest, CreateErrorShaderModule) {
+    wgpu::ShaderModuleWGSLDescriptor wgslDesc = {};
+    wgpu::ShaderModuleDescriptor descriptor = {};
+    descriptor.nextInChain = &wgslDesc;
+    wgslDesc.code = "@compute @workgroup_size(1) fn main() {}";
+
+    wgpu::ShaderModule errorShaderModule;
+    ASSERT_DEVICE_ERROR(errorShaderModule = device.CreateErrorShaderModule(
+                            &descriptor, "Shader compilation error"));
+
+    auto callback = [](WGPUCompilationInfoRequestStatus status, const WGPUCompilationInfo* info,
+                       void* userdata) {
+        ASSERT_EQ(WGPUCompilationInfoRequestStatus_Success, status);
+        ASSERT_NE(nullptr, info);
+        ASSERT_EQ(1u, info->messageCount);
+
+        const WGPUCompilationMessage* message = &info->messages[0];
+        ASSERT_STREQ("Shader compilation error", message->message);
+        ASSERT_EQ(WGPUCompilationMessageType_Error, message->type);
+        ASSERT_EQ(0u, message->lineNum);
+        ASSERT_EQ(0u, message->linePos);
+    };
+
+    errorShaderModule.GetCompilationInfo(callback, nullptr);
+
+    FlushWire();
+}
+
 }  // anonymous namespace
 }  // namespace dawn