vendor/compiler-rt/compiler-rt-trunk-r366426

1 files changed, 23 insertions, 0 deletions

diff --git a/lib/gwp_asan/random.cpp b/lib/gwp_asan/random.cpp
new file mode 100644
index 000000000000..90493da7e038
--- /dev/null
+++ b/lib/gwp_asan/random.cpp
@@ -0,0 +1,23 @@
+//===-- random.cpp ----------------------------------------------*- 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
+//
+//===----------------------------------------------------------------------===//
+
+#include "gwp_asan/random.h"
+#include "gwp_asan/guarded_pool_allocator.h"
+
+#include <time.h>
+
+namespace gwp_asan {
+uint32_t getRandomUnsigned32() {
+  thread_local uint32_t RandomState =
+      time(nullptr) + GuardedPoolAllocator::getThreadID();
+  RandomState ^= RandomState << 13;
+  RandomState ^= RandomState >> 17;
+  RandomState ^= RandomState << 5;
+  return RandomState;
+}
+} // namespace gwp_asan