[clang] [compiler-rt] [compiler-rt] Realtime Sanitizer: Introduce Realtime Sanitizer (RTSan) backend (PR #92460)

[Fangrui Song via cfe-commits]

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+//===--- rtsan_test.cpp - Realtime Sanitizer --------------------*- C++ -*-===//
+//
+// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
+// See https://llvm.org/LICENSE.txt for license information.
+// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
+//
+//===----------------------------------------------------------------------===//
+//
+// Introduces basic functional tests for the realtime sanitizer.
+// Not meant to be exhaustive, testing all interceptors, please see
+// test_rtsan_interceptors.cpp for those tests.
+//
+//===----------------------------------------------------------------------===//
+
+#include "gtest/gtest.h"
+
+#include "rtsan_test_utilities.h"
+#include <rtsan.h>
+#include <sanitizer_common/sanitizer_platform.h>
+#include <sanitizer_common/sanitizer_platform_interceptors.h>
+
+#include <array>
+#include <atomic>
+#include <chrono>
+#include <fstream>
+#include <mutex>
+#include <shared_mutex>
+#include <thread>
+
+#if defined(__ENVIRONMENT_MAC_OS_X_VERSION_MIN_REQUIRED__) &&                  \
+    __ENVIRONMENT_MAC_OS_X_VERSION_MIN_REQUIRED__ >= 101200
+#define SI_MAC_DEPLOYMENT_AT_LEAST_10_12 1
+#else
+#define SI_MAC_DEPLOYMENT_AT_LEAST_10_12 0
+#endif
+
+#define RTSAN_TEST_SHARED_MUTEX (!(SI_MAC) || SI_MAC_DEPLOYMENT_AT_LEAST_10_12)
+
+using namespace testing;
+using namespace rtsan_testing;
+using namespace std::chrono_literals;
+
+TEST(TestRtsan, VectorPushBackAllocationDiesWhenRealtime) {
+  std::vector<float> vec{};
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MaskRay wrote:

omit `{};`

https://github.com/llvm/llvm-project/pull/92460