1 files changed, 75 insertions, 0 deletions
diff --git a/contrib/llvm-project/compiler-rt/lib/scudo/standalone/mem_map_fuchsia.h b/contrib/llvm-project/compiler-rt/lib/scudo/standalone/mem_map_fuchsia.h
new file mode 100644
index 000000000000..2e66f89cfca5
--- /dev/null
+++ b/contrib/llvm-project/compiler-rt/lib/scudo/standalone/mem_map_fuchsia.h
@@ -0,0 +1,75 @@
+//===-- mem_map_fuchsia.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_FUCHSIA_H_
+#define SCUDO_MEM_MAP_FUCHSIA_H_
+
+#include "mem_map_base.h"
+
+#if SCUDO_FUCHSIA
+
+#include <stdint.h>
+#include <zircon/types.h>
+
+namespace scudo {
+
+class MemMapFuchsia final : public MemMapBase<MemMapFuchsia> {
+public:
+  constexpr MemMapFuchsia() = default;
+
+  // Impls for base functions.
+  bool mapImpl(uptr Addr, uptr Size, const char *Name, uptr Flags);
+  void unmapImpl(uptr Addr, uptr Size);
+  bool remapImpl(uptr Addr, uptr Size, const char *Name, uptr Flags);
+  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 WindowBase; }
+  uptr getCapacityImpl() { return WindowSize; }
+
+private:
+  friend class ReservedMemoryFuchsia;
+
+  // Used by ReservedMemoryFuchsia::dispatch.
+  MemMapFuchsia(uptr Base, uptr Capacity);
+
+  // Virtual memory address corresponding to VMO offset 0.
+  uptr MapAddr = 0;
+
+  // Virtual memory base address and size of the VMO subrange that is still in
+  // use. unmapImpl() can shrink this range, either at the beginning or at the
+  // end.
+  uptr WindowBase = 0;
+  uptr WindowSize = 0;
+
+  zx_handle_t Vmo = ZX_HANDLE_INVALID;
+};
+
+class ReservedMemoryFuchsia final
+    : public ReservedMemory<ReservedMemoryFuchsia, MemMapFuchsia> {
+public:
+  constexpr ReservedMemoryFuchsia() = default;
+
+  bool createImpl(uptr Addr, uptr Size, const char *Name, uptr Flags);
+  void releaseImpl();
+  MemMapT dispatchImpl(uptr Addr, uptr Size);
+  uptr getBaseImpl() { return Base; }
+  uptr getCapacityImpl() { return Capacity; }
+
+private:
+  uptr Base = 0;
+  uptr Capacity = 0;
+};
+
+} // namespace scudo
+
+#endif // SCUDO_FUCHSIA
+
+#endif // SCUDO_MEM_MAP_FUCHSIA_H_