Add a new slang-test option `-enable-debug-layers` (#7300)

* Add a new slang-test option `-enable-debug-layers`

A variable `disableDebugLayer` is renamed to `enableDebugLayers`,
and a corresponding command-line argument is added,
`-enable-debug-layers`.

The previous option `-disable-debug-layer` is still available, but it
prints a deprecation warning message.

The reason why it is added is to make the option available to both Debug
and Release. On Debug build, it will be enabled by default, and it will
be disabled on Release build. We should be able to not only disable it,
but also enable it on Release build.

Ideally this option should be enabled all the time, but currently there
are too many VUID error messages printed and we are enabling only for
Debug build for now.

Note that the CI/CD will run with the option disabled until we resolve
all of VUID errors.

1 files changed, 7 insertions, 12 deletions

diff --git a/tools/slang-test/slang-test-main.cpp b/tools/slang-test/slang-test-main.cpp
index 72af73cc1..f0a140549 100644
--- a/tools/slang-test/slang-test-main.cpp
+++ b/tools/slang-test/slang-test-main.cpp
@@ -3394,6 +3394,11 @@ static void _addRenderTestOptions(const Options& options, CommandLine& ioCmdLine
         ioCmdLine.addArg("-capability");
         ioCmdLine.addArg(capability);
     }
+
+    if (options.enableDebugLayers)
+    {
+        ioCmdLine.addArg("-enable-debug-layers");
+    }
 }
 
 static SlangResult _extractProfileTime(const UnownedStringSlice& text, double& timeOut)
@@ -3602,17 +3607,6 @@ TestResult runComputeComparisonImpl(
     auto actualOutputFile = outputStem + ".actual.txt";
     cmdLine.addArg(actualOutputFile);
 
-#if _DEBUG
-    // When using test server, any validation warning printed from the backend
-    // gets misinterpreted as the result from the test.
-    // This is due to the limitation that Slang RPC implementation expects only
-    // one time communication.
-    if (context->options.debugLayerEnabled && input.spawnType != SpawnType::UseTestServer)
-    {
-        cmdLine.addArg("-enable-debug-layers");
-    }
-#endif
-
     if (context->isExecuting())
     {
         // clear the stale actual output file first. This will allow us to detect error if
@@ -4705,7 +4699,7 @@ static SlangResult runUnitTestModule(
     unitTestContext.slangGlobalSession = context->getSession();
     unitTestContext.workDirectory = "";
     unitTestContext.enabledApis = context->options.enabledApis;
-    unitTestContext.enableDebugLayers = context->options.debugLayerEnabled;
+    unitTestContext.enableDebugLayers = context->options.enableDebugLayers;
     unitTestContext.executableDirectory = context->exeDirectoryPath.getBuffer();
 
     auto testCount = testModule->getTestCount();
@@ -4749,6 +4743,7 @@ static SlangResult runUnitTestModule(
         {
             TestServerProtocol::ExecuteUnitTestArgs args;
             args.enabledApis = context->options.enabledApis;
+            args.enableDebugLayers = context->options.enableDebugLayers;
             args.moduleName = moduleName;
             args.testName = test.testName;