Language server pointer type support + add `DLLImport` test (#2350)

* Language server pointer type support.

+ Natvis for AST.

* Add completion suggestion for GUID.

* Make executable test able to use slang-rt.

* Fix gcc argument for rpath.

* Fix DLLImport on linux.

* Fix windows.

* Fix.

Co-authored-by: Yong He <yhe@nvidia.com>

2 files changed, 14 insertions, 7 deletions

diff --git a/source/core/slang-platform.cpp b/source/core/slang-platform.cpp
index 5185d5d23..921c85612 100644
--- a/source/core/slang-platform.cpp
+++ b/source/core/slang-platform.cpp
@@ -43,7 +43,7 @@ namespace Slang
 
         Path::combineIntoBuilder(parent.getUnownedSlice(), platformFileNameBuilder.getUnownedSlice(), outPath);
     }
-    else
+    else if (filename.getLength() > 0)
     {     
         appendPlatformFileName(filename.getUnownedSlice(), outPath);
     }
@@ -107,6 +107,13 @@ SLANG_COMPILE_TIME_ASSERT(E_OUTOFMEMORY == SLANG_E_OUT_OF_MEMORY);
 /* static */SlangResult SharedLibrary::loadWithPlatformPath(char const* platformFileName, SharedLibrary::Handle& handleOut)
 {
     handleOut = nullptr;
+    if (!platformFileName || strlen(platformFileName) == 0)
+    {
+        if (!GetModuleHandleExA(0, nullptr, (HMODULE*)&handleOut))
+            return SLANG_FAIL;
+        return SLANG_OK;
+    }
+
     // https://docs.microsoft.com/en-us/windows/desktop/api/libloaderapi/nf-libloaderapi-loadlibrarya
     const HMODULE h = LoadLibraryA(platformFileName);
     if (!h)
@@ -170,10 +177,11 @@ SLANG_COMPILE_TIME_ASSERT(E_OUTOFMEMORY == SLANG_E_OUT_OF_MEMORY);
 /* static */SlangResult SharedLibrary::loadWithPlatformPath(char const* platformFileName, Handle& handleOut)
 {
     handleOut = nullptr;
-
-	void* h = dlopen(platformFileName, RTLD_NOW | RTLD_GLOBAL);
-	if(!h)
-	{
+    if (strlen(platformFileName) == 0)
+        platformFileName = nullptr;
+    void *h = dlopen(platformFileName, RTLD_NOW | RTLD_GLOBAL);
+    if (!h)
+    {
 #if 0
         // We can't output the error message here, because it will cause output when testing what code gen is available
 		if(auto msg = dlerror())
@@ -195,7 +203,6 @@ SLANG_COMPILE_TIME_ASSERT(E_OUTOFMEMORY == SLANG_E_OUT_OF_MEMORY);
 
 /* static */void* SharedLibrary::findSymbolAddressByName(Handle handle, char const* name)
 {
-    SLANG_ASSERT(handle);
 	return dlsym((void*)handle, name);
 }
 
diff --git a/source/core/slang-shared-library.cpp b/source/core/slang-shared-library.cpp
index f31c7d689..6ce10ad9e 100644
--- a/source/core/slang-shared-library.cpp
+++ b/source/core/slang-shared-library.cpp
@@ -33,7 +33,7 @@ SlangResult DefaultSharedLibraryLoader::loadSharedLibrary(const char* path, ISla
 {
     *outSharedLibrary = nullptr;
     // Try loading
-    SharedLibrary::Handle handle;
+    SharedLibrary::Handle handle = nullptr;
     SLANG_RETURN_ON_FAIL(SharedLibrary::load(path, handle));
     *outSharedLibrary = ComPtr<ISlangSharedLibrary>(new DefaultSharedLibrary(handle)).detach();
     return SLANG_OK;