[sanitizer] Use COMPILER_RT_EMULATOR with gtests

Reviewed By: morehouse

Differential Revision: https://reviews.llvm.org/D100998

compiler-rt/unittests/lit.common.unit.cfg.py

diff --git a/compiler-rt/unittests/lit.common.unit.cfg.py b/compiler-rt/unittests/lit.common.unit.cfg.py
index fba034a..4cf5bf7 100644
--- a/compiler-rt/unittests/lit.common.unit.cfg.py
+++ b/compiler-rt/unittests/lit.common.unit.cfg.py
@@ -8,9 +8,21 @@
 
 import lit.formats
 
+# Copied from libcxx's config.py
+def get_lit_conf(name, default=None):
+    # Allow overriding on the command line using --param=<name>=<val>
+    val = lit_config.params.get(name, None)
+    if val is None:
+        val = getattr(config, name, None)
+        if val is None:
+            val = default
+    return val
+
+emulator = get_lit_conf('emulator', None)
+
 # Setup test format
 llvm_build_mode = getattr(config, "llvm_build_mode", "Debug")
-config.test_format = lit.formats.GoogleTest(llvm_build_mode, "Test")
+config.test_format = lit.formats.GoogleTest(llvm_build_mode, "Test", emulator)
 
 # Setup test suffixes.
 config.suffixes = []

compiler-rt/unittests/lit.common.unit.configured.in

diff --git a/compiler-rt/unittests/lit.common.unit.configured.in b/compiler-rt/unittests/lit.common.unit.configured.in
index d959d43..29e1615 100644
--- a/compiler-rt/unittests/lit.common.unit.configured.in
+++ b/compiler-rt/unittests/lit.common.unit.configured.in
@@ -12,6 +12,7 @@
 config.host_os = "@HOST_OS@"
 config.llvm_lib_dir = "@LLVM_LIBRARY_DIR@"
 config.gwp_asan = @COMPILER_RT_HAS_GWP_ASAN_PYBOOL@
+config.emulator = "@COMPILER_RT_EMULATOR@"
 
 # LLVM tools dir and build mode can be passed in lit parameters,
 # so try to apply substitution.