Enable named mmap usage for CMake builds

src/Reactor/CMakeLists.txt

@@ -72,6 +72,8 @@ if(REACTOR_ENABLE_MEMORY_SANITIZER_INSTRUMENTATION)
     list(APPEND REACTOR_PUBLIC_COMPILE_DEFINITIONS "REACTOR_ENABLE_MEMORY_SANITIZER_INSTRUMENTATION")
 endif()
 
+list(APPEND REACTOR_PRIVATE_COMPILE_DEFINITIONS "REACTOR_ANONYMOUS_MMAP_NAME=swiftshader_jit")
+
 # SubzeroReactor library
 
 add_library(ReactorSubzero STATIC EXCLUDE_FROM_ALL

src/Reactor/ExecutableMemory.cpp

@@ -172,7 +172,8 @@ void ensureAnonFileSize(int anonFd, size_t length)
 	static size_t fileSize = 0;
 	if(length > fileSize)
 	{
-		ftruncate(anonFd, length);
+		[[maybe_unused]] int result = ftruncate(anonFd, length);
+		ASSERT(result == 0);
 		fileSize = length;
 	}
 }