1 files changed, 67 insertions, 0 deletions
diff --git a/contrib/llvm-project/compiler-rt/lib/scudo/standalone/mem_map_linux.h b/contrib/llvm-project/compiler-rt/lib/scudo/standalone/mem_map_linux.h
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index 000000000000..7a89b3bff5ed
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+++ b/contrib/llvm-project/compiler-rt/lib/scudo/standalone/mem_map_linux.h
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+//===-- mem_map_linux.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
+//
+//===----------------------------------------------------------------------===//
+
+#ifndef SCUDO_MEM_MAP_LINUX_H_
+#define SCUDO_MEM_MAP_LINUX_H_
+
+#include "platform.h"
+
+#if SCUDO_LINUX
+
+#include "common.h"
+#include "mem_map_base.h"
+
+namespace scudo {
+
+class MemMapLinux final : public MemMapBase<MemMapLinux> {
+public:
+  constexpr MemMapLinux() = default;
+  MemMapLinux(uptr Base, uptr Capacity)
+      : MapBase(Base), MapCapacity(Capacity) {}
+
+  // Impls for base functions.
+  bool mapImpl(uptr Addr, uptr Size, const char *Name, uptr Flags = 0);
+  void unmapImpl(uptr Addr, uptr Size);
+  bool remapImpl(uptr Addr, uptr Size, const char *Name, uptr Flags = 0);
+  void setMemoryPermissionImpl(uptr Addr, uptr Size, uptr Flags);
+  void releasePagesToOSImpl(uptr From, uptr Size) {
+    return releaseAndZeroPagesToOSImpl(From, Size);
+  }
+  void releaseAndZeroPagesToOSImpl(uptr From, uptr Size);
+  uptr getBaseImpl() { return MapBase; }
+  uptr getCapacityImpl() { return MapCapacity; }
+
+private:
+  uptr MapBase = 0;
+  uptr MapCapacity = 0;
+};
+
+// This will be deprecated when every allocator has been supported by each
+// platform's `MemMap` implementation.
+class ReservedMemoryLinux final
+    : public ReservedMemory<ReservedMemoryLinux, MemMapLinux> {
+public:
+  // The following two are the Impls for function in `MemMapBase`.
+  uptr getBaseImpl() { return MapBase; }
+  uptr getCapacityImpl() { return MapCapacity; }
+
+  // These threes are specific to `ReservedMemory`.
+  bool createImpl(uptr Addr, uptr Size, const char *Name, uptr Flags);
+  void releaseImpl();
+  MemMapT dispatchImpl(uptr Addr, uptr Size);
+
+private:
+  uptr MapBase = 0;
+  uptr MapCapacity = 0;
+};
+
+} // namespace scudo
+
+#endif // SCUDO_LINUX
+
+#endif // SCUDO_MEM_MAP_LINUX_H_