Add cross-process coverage flushing for the LLVM toolchain.

Bug: 143977934
Test: Build with native coverage
Test: kill -37 <pid> and check for coverage in /data/misc/trace
Change-Id: Iadf93e62d92dc35cdaa35162ca4a75d26190db85

1 files changed, 36 insertions, 0 deletions

diff --git a/toolchain-extras/profile-clang-extras-test.cpp b/toolchain-extras/profile-clang-extras-test.cpp
new file mode 100644
index 00000000..2bb7bdbb
--- /dev/null
+++ b/toolchain-extras/profile-clang-extras-test.cpp
@@ -0,0 +1,36 @@
+/*
+ * Copyright (C) 2020 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#include <gtest/gtest.h>
+#include "profile-extras.h"
+
+static int flush_count = 0;
+
+extern "C" {
+int __llvm_profile_write_file() {
+  flush_count++;
+  return 0;
+}
+}
+
+TEST(profile_extras, smoke) {
+  flush_count = 0;
+
+  ASSERT_EQ(0, flush_count);
+  kill(getpid(), GCOV_FLUSH_SIGNAL);
+  sleep(2);
+  ASSERT_EQ(1, flush_count);
+}