1 files changed, 81 insertions, 0 deletions
diff --git a/contrib/llvm-project/compiler-rt/lib/msan/msan_thread.h b/contrib/llvm-project/compiler-rt/lib/msan/msan_thread.h
new file mode 100644
index 000000000000..f6ed1534cccd
--- /dev/null
+++ b/contrib/llvm-project/compiler-rt/lib/msan/msan_thread.h
@@ -0,0 +1,81 @@
+//===-- msan_thread.h -------------------------------------------*- 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
+//
+//===----------------------------------------------------------------------===//
+//
+// This file is a part of MemorySanitizer.
+//
+//===----------------------------------------------------------------------===//
+
+#ifndef MSAN_THREAD_H
+#define MSAN_THREAD_H
+
+#include "msan_allocator.h"
+#include "sanitizer_common/sanitizer_common.h"
+#include "sanitizer_common/sanitizer_posix.h"
+namespace __msan {
+
+class MsanThread {
+ public:
+  static MsanThread *Create(thread_callback_t start_routine, void *arg);
+  static void TSDDtor(void *tsd);
+  void Destroy();
+
+  void Init();  // Should be called from the thread itself.
+  thread_return_t ThreadStart();
+
+  uptr stack_top();
+  uptr stack_bottom();
+  uptr tls_begin() { return tls_begin_; }
+  uptr tls_end() { return tls_end_; }
+  bool IsMainThread() { return start_routine_ == nullptr; }
+
+  bool AddrIsInStack(uptr addr);
+
+  bool InSignalHandler() { return in_signal_handler_; }
+  void EnterSignalHandler() { in_signal_handler_++; }
+  void LeaveSignalHandler() { in_signal_handler_--; }
+
+  void StartSwitchFiber(uptr bottom, uptr size);
+  void FinishSwitchFiber(uptr *bottom_old, uptr *size_old);
+
+  MsanThreadLocalMallocStorage &malloc_storage() { return malloc_storage_; }
+
+  int destructor_iterations_;
+  __sanitizer_sigset_t starting_sigset_;
+
+ private:
+  // NOTE: There is no MsanThread constructor. It is allocated
+  // via mmap() and *must* be valid in zero-initialized state.
+  void SetThreadStackAndTls();
+  void ClearShadowForThreadStackAndTLS();
+  struct StackBounds {
+    uptr bottom;
+    uptr top;
+  };
+  StackBounds GetStackBounds() const;
+  thread_callback_t start_routine_;
+  void *arg_;
+
+  bool stack_switching_;
+
+  StackBounds stack_;
+  StackBounds next_stack_;
+
+  uptr tls_begin_;
+  uptr tls_end_;
+
+  unsigned in_signal_handler_;
+
+  MsanThreadLocalMallocStorage malloc_storage_;
+};
+
+MsanThread *GetCurrentThread();
+void SetCurrentThread(MsanThread *t);
+
+} // namespace __msan
+
+#endif // MSAN_THREAD_H