Vendor import of compiler-rt trunk r300422:vendor/compiler-rt/compiler-rt-trunk-r300422

https://llvm.org/svn/llvm-project/compiler-rt/trunk@300422

2 files changed, 20 insertions, 0 deletions

diff --git a/unittests/lit.common.unit.cfg b/unittests/lit.common.unit.cfg
index 2bd8f376f00e..b08c1fe12831 100644
--- a/unittests/lit.common.unit.cfg
+++ b/unittests/lit.common.unit.cfg
@@ -28,3 +28,19 @@ if 'TMP' in os.environ:
     config.environment['TMP'] = os.environ['TMP']
 if 'TEMP' in os.environ:
     config.environment['TEMP'] = os.environ['TEMP']
+
+if config.host_os == 'Darwin':
+  # Only run up to 3 64-bit sanitized processes simultaneously on Darwin.
+  # Using more scales badly and hogs the system due to inefficient handling
+  # of large mmap'd regions (terabytes) by the kernel.
+  lit_config.parallelism_groups["darwin-64bit-sanitizer"] = 3
+
+  # The test config gets pickled and sent to multiprocessing workers, and that
+  # only works for code if it is stored at the top level of some module.
+  # Therefore, we have to put the code in a .py file, add it to path, and import
+  # it to store it in the config.
+  import site
+  site.addsitedir(os.path.dirname(__file__))
+  import lit_unittest_cfg_utils
+  config.darwin_sanitizer_parallelism_group_func = \
+    lit_unittest_cfg_utils.darwin_sanitizer_parallelism_group_func
diff --git a/unittests/lit_unittest_cfg_utils.py b/unittests/lit_unittest_cfg_utils.py
new file mode 100644
index 000000000000..ff7b1ee0140b
--- /dev/null
+++ b/unittests/lit_unittest_cfg_utils.py
@@ -0,0 +1,4 @@
+# Put all 64-bit sanitizer tests in the darwin-64bit-sanitizer parallelism
+# group. This will only run three of them concurrently.
+def darwin_sanitizer_parallelism_group_func(test):
+  return "darwin-64bit-sanitizer" if "x86_64" in test.file_path else ""