Refactor shader cache (#2558)

* Fix a bug in Path::find

* Fix code formatting

* Fix LockFile and add LockFileGuard

* Add PersistentCache and unit test

* Replace file path dependency list with source file dependency list

* Add note on ordering in Module/FileDependencyList

* Remove old shader cache code

* Refactor shader cache implementation

* Temporarily skip unit tests reading/writing files

* Fix warning

* Reenable lock file test

* Rename shader cache tests and disable crashing test

* Testing

* Stop using Path::getCanonical

* Fix persistent cache lock and test

* Fix threading issues

* Move adding file dependency hashes to getEntryPointHash()

* Fix handling of #include files

* Allow specifying additional search paths for gfx testing device

* Work on shader cache tests

* Update project files

* Revive shader cache graphics tests

* Split graphics pipeline test

* Fix compilation

1 files changed, 11 insertions, 12 deletions

diff --git a/source/slang/slang-preprocessor.cpp b/source/slang/slang-preprocessor.cpp
index fca8f5029..341e75ea4 100644
--- a/source/slang/slang-preprocessor.cpp
+++ b/source/slang/slang-preprocessor.cpp
@@ -32,9 +32,9 @@ void PreprocessorHandler::handleEndOfTranslationUnit(Preprocessor* preprocessor)
     SLANG_UNUSED(preprocessor);
 }
 
-void PreprocessorHandler::handleFileDependency(String const& path)
+void PreprocessorHandler::handleFileDependency(SourceFile* sourceFile)
 {
-    SLANG_UNUSED(path);
+    SLANG_UNUSED(sourceFile);
 }
 
 // In order to simplify the naming scheme, we will nest the implementaiton of the
@@ -2966,15 +2966,6 @@ static SlangResult readFile(
     auto fileSystemExt = context->m_preprocessor->fileSystem;
     SLANG_RETURN_ON_FAIL(fileSystemExt->loadFile(path.getBuffer(), outBlob));
 
-    // If we are running the preprocessor as part of compiling a
-    // specific module, then we must keep track of the file we've
-    // read as yet another file that the module will depend on.
-    //
-    if( auto handler = context->m_preprocessor->handler )
-    {
-        handler->handleFileDependency(path);
-    }
-
     return SLANG_OK;
 }
 
@@ -3056,10 +3047,18 @@ static void HandleIncludeDirective(PreprocessorDirectiveContext* context)
         }
 
         sourceFile = sourceManager->createSourceFileWithBlob(filePathInfo, foundSourceBlob);
-
         sourceManager->addSourceFile(filePathInfo.uniqueIdentity, sourceFile);
     }
 
+    // If we are running the preprocessor as part of compiling a
+    // specific module, then we must keep track of the file we've
+    // read as yet another file that the module will depend on.
+    //
+    if (auto handler = context->m_preprocessor->handler)
+    {
+        handler->handleFileDependency(sourceFile);
+    }
+
     // This is a new parse (even if it's a pre-existing source file), so create a new SourceView
     SourceView* sourceView = sourceManager->createSourceView(sourceFile, &filePathInfo, directiveLoc);