[ASan] set DYLD_LIBRARY_PATH on Darwin

[garious]

Summary

The CMake build doesn't seem to be as well supported on Darwin as it is Linux. This patch takes the test suite from ~50 tests passing to 266 passing (34 failing).

[samsonov]

LGTM

test/asan/lit.cfg

18 ↗

(On Diff #20114)

Do you need to make the same fix to test/asan/Unit/lit.site.cfg.in?

compiler-rt/trunk/test/asan/lit.cfg

lit_config.fatal(
       "No attribute %r in test configuration! You may need to run "
       "tests from your build directory or add this attribute "
       "to lit.site.cfg " % attr_name)
   return attr_value
 
 def push_dynamic_library_lookup_path(config, new_path):
   if platform.system() == 'Windows':
     dynamic_library_lookup_var = 'PATH'
+  elif platform.system() == 'Darwin':
+    dynamic_library_lookup_var = 'DYLD_LIBRARY_PATH'
   else:
     dynamic_library_lookup_var = 'LD_LIBRARY_PATH'
 
   new_ld_library_path = os.path.pathsep.join(
     (new_path, config.environment.get(dynamic_library_lookup_var, '')))
   config.environment[dynamic_library_lookup_var] = new_ld_library_path
 
 # Setup config name.