diff --git a/libcxx/utils/run.py b/libcxx/utils/run.py
--- a/libcxx/utils/run.py
+++ b/libcxx/utils/run.py
@@ -53,6 +53,23 @@
         if 'TEMP' in os.environ:
             env['TEMP'] = os.environ.get('TEMP')
 
+    pass_vars = [
+        'ASAN_SYMBOLIZER_PATH',
+        'LSAN_SYMBOLIZER_PATH',
+        'MSAN_SYMBOLIZER_PATH',
+        'TSAN_SYMBOLIZER_PATH',
+        'UBSAN_SYMBOLIZER_PATH',
+        'ASAN_OPTIONS',
+        'LSAN_OPTIONS',
+        'MSAN_OPTIONS',
+        'TSAN_OPTIONS',
+        'UBSAN_OPTIONS',
+    ]
+    for var in pass_vars:
+        val = os.environ.get(var, '')
+        if val:
+            env[var] = val
+
     # Run the command line with the given environment in the execution directory.
     return subprocess.call(commandLine, cwd=args.execdir, env=env, shell=False)