diff --git a/clang/test/lit.cfg b/clang/test/lit.cfg
index bf8528b3f68a..7bc6321a7f8c 100644
--- a/clang/test/lit.cfg
+++ b/clang/test/lit.cfg
@@ -317,3 +317,23 @@ if (config.llvm_use_sanitizer == "Memory" or
 # Check if we should run long running tests.
 if lit.params.get("run_long_tests", None) == "true":
     config.available_features.add("long_tests")
+
+# Check if we should use gmalloc.
+use_gmalloc_str = lit.params.get('use_gmalloc', None)
+if use_gmalloc_str is not None:
+    if use_gmalloc_str.lower() in ('1', 'true'):
+        use_gmalloc = True
+    elif use_gmalloc_str.lower() in ('', '0', 'false'):
+        use_gmalloc = False
+    else:
+        lit.fatal('user parameter use_gmalloc should be 0 or 1')
+else:
+    # Default to not using gmalloc
+    use_gmalloc = False
+
+# Allow use of an explicit path for gmalloc library.
+# Will default to '/usr/lib/libgmalloc.dylib' if not set.
+gmalloc_path_str = lit.params.get('gmalloc_path', '/usr/lib/libgmalloc.dylib')
+
+if use_gmalloc:
+     config.environment.update({'DYLD_INSERT_LIBRARIES' : gmalloc_path_str})