Clear environment variables that might affect Clang before running tests.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@154188 91177308-0d34-0410-b5e6-96231b3b80d8

1 files changed, 26 insertions, 0 deletions

diff --git a/test/lit.cfg b/test/lit.cfg
index f759275784..3dee99652c 100644
--- a/test/lit.cfg
+++ b/test/lit.cfg
@@ -46,6 +46,32 @@ if clang_obj_root is not None:
 config.llvm_src_root = getattr(config, 'llvm_src_root', None)
 config.llvm_obj_root = getattr(config, 'llvm_obj_root', None)
 
+# Clear some environment variables that might affect Clang.
+#
+# This first set of vars are read by Clang, but shouldn't affect tests
+# that aren't specifically looking for these features, or are required
+# simply to run the tests at all.
+#
+# FIXME: Should we have a tool that enforces this?
+
+# safe_env_vars = ('TMPDIR', 'TEMP', 'TMP', 'USERPROFILE', 'PWD',
+#                  'MACOSX_DEPLOYMENT_TARGET', 'IPHONEOS_DEPLOYMENT_TARGET',
+#                  'IOS_SIMULATOR_DEPLOYMENT_TARGET',
+#                  'VCINSTALLDIR', 'VC100COMNTOOLS', 'VC90COMNTOOLS',
+#                  'VC80COMNTOOLS')
+possibly_dangerous_env_vars = ('COMPILER_PATH', 'RC_DEBUG_OPTIONS', 'INCLUDE',
+                               'CINDEXTEST_PREAMBLE_FILE', 'LIBRARY_PATH',
+                               'CPATH', 'C_INCLUDE_PATH', 'CPLUS_INCLUDE_PATH',
+                               'OBJC_INCLUDE_PATH', 'OBJCPLUS_INCLUDE_PATH',
+                               'LIBCLANG_TIMING', 'LIBCLANG_OBJTRACKING',
+                               'LIBCLANG_LOGGING', 'LIBCLANG_BGPRIO_INDEX',
+                               'LIBCLANG_BGPRIO_EDIT', 'LIBCLANG_NOTHREADS',
+                               'LIBCLANG_RESOURCE_USAGE',
+                               'LIBCLANG_CODE_COMPLETION_LOGGING')
+for name in possibly_dangerous_env_vars:
+  if name in config.environment:
+    del config.environment[name]
+
 # Tweak the PATH to include the tools dir and the scripts dir.
 if clang_obj_root is not None:
     llvm_tools_dir = getattr(config, 'llvm_tools_dir', None)