Add low_4gb MemMap and remove ashmem support for Fuchsia

Test: Tested with Fuchsia build system go/fuchsia-android
Change-Id: I61b09614d6f4d24bf9c975baa1f34c6b5735ca3d

1 files changed, 35 insertions, 0 deletions

diff --git a/libartbase/base/mem_map_unix.cc b/libartbase/base/mem_map_unix.cc
new file mode 100644
index 0000000000..601b049525
--- /dev/null
+++ b/libartbase/base/mem_map_unix.cc
@@ -0,0 +1,35 @@
+/*
+ * Copyright (C) 2018 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#include "mem_map.h"
+
+#include <sys/mman.h>
+
+namespace art {
+
+void MemMap::TargetMMapInit() {
+  // no-op for unix
+}
+
+void* MemMap::TargetMMap(void* start, size_t len, int prot, int flags, int fd, off_t fd_off) {
+  return mmap(start, len, prot, flags, fd, fd_off);
+}
+
+int MemMap::TargetMUnmap(void* start, size_t len) {
+  return munmap(start, len);
+}
+
+}  // namespace art