[core][misc] update libcudart finding (#7620)

Co-authored-by: cjackal <44624812+cjackal@users.noreply.github.com>

vllm/distributed/device_communicators/cuda_wrapper.py

@@ -49,8 +49,13 @@ def find_loaded_library(lib_name) -> Optional[str]:
     if not found:
         # the library is not loaded in the current process
         return None
+    # if lib_name is libcudart, we need to match a line with:
+    # address /path/to/libcudart-hash.so.11.0
     start = line.index("/")
     path = line[start:].strip()
+    filename = path.split("/")[-1]
+    assert filename.rpartition(".so")[0].startswith(lib_name), \
+        f"Unexpected filename: {filename} for library {lib_name}"
     return path
 
 
@@ -98,9 +103,9 @@ class CudaRTLibrary:
 
     def __init__(self, so_file: Optional[str] = None):
         if so_file is None:
-            so_file = find_loaded_library("libcudart.so")
+            so_file = find_loaded_library("libcudart")
             assert so_file is not None, \
-                "libcudart.so is not loaded in the current process"
+                "libcudart is not loaded in the current process"
         if so_file not in CudaRTLibrary.path_to_library_cache:
             lib = ctypes.CDLL(so_file)
             CudaRTLibrary.path_to_library_cache[so_file] = lib