Set symbolizer path in the test environment.

This is needed to get symbolized stack traces when running Clang tests under (A|M)San.


git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@176934 91177308-0d34-0410-b5e6-96231b3b80d8

test/Unit/lit.cfg

@@ -84,3 +84,8 @@ if config.enable_shared:
         shlibpath = os.pathsep + shlibpath
     shlibpath = config.shlibdir + shlibpath
     config.environment[config.shlibpath_var] = shlibpath
+
+# Setup paths to llvm-symbolizer for Sanitizer tools.
+llvm_tools_dir = getattr(config, 'llvm_tools_dir', None)
+config.environment['ASAN_SYMBOLIZER_PATH'] = llvm_tools_dir + '/llvm-symbolizer'
+config.environment['MSAN_SYMBOLIZER_PATH'] = llvm_tools_dir + '/llvm-symbolizer'

test/lit.cfg

@@ -142,6 +142,11 @@ if config.test_exec_root is None:
     lit.load_config(config, site_cfg)
     raise SystemExit
 
+# Setup paths to llvm-symbolizer for Sanitizer tools.
+llvm_tools_dir = getattr(config, 'llvm_tools_dir', None)
+config.environment['ASAN_SYMBOLIZER_PATH'] = llvm_tools_dir + '/llvm-symbolizer'
+config.environment['MSAN_SYMBOLIZER_PATH'] = llvm_tools_dir + '/llvm-symbolizer'
+
 ###
 
 # Discover the 'clang' and 'clangcc' to use.