src/os/linux/vm/os_linux.hpp

@@ -97,10 +97,13 @@
   static char* reserve_memory_special_shm(size_t bytes, size_t alignment, char* req_addr, bool exec);
   static char* reserve_memory_special_huge_tlbfs(size_t bytes, size_t alignment, char* req_addr, bool exec);
   static char* reserve_memory_special_huge_tlbfs_only(size_t bytes, char* req_addr, bool exec);
   static char* reserve_memory_special_huge_tlbfs_mixed(size_t bytes, size_t alignment, char* req_addr, bool exec);
 
+  static char*  reserve_memory_with_backing_file(size_t bytes, char* requested_addr,
+                                                 size_t alignment_hint, const char* backingFileDir);
+
   static bool release_memory_special_impl(char* base, size_t bytes);
   static bool release_memory_special_shm(char* base, size_t bytes);
   static bool release_memory_special_huge_tlbfs(char* base, size_t bytes);
 
   static void print_full_memory_info(outputStream* st);

@@ -247,10 +250,16 @@
   static void set_numa_tonode_memory(numa_tonode_memory_func_t func) { _numa_tonode_memory = func; }
   static void set_numa_interleave_memory(numa_interleave_memory_func_t func) { _numa_interleave_memory = func; }
   static void set_numa_set_bind_policy(numa_set_bind_policy_func_t func) { _numa_set_bind_policy = func; }
   static void set_numa_all_nodes(unsigned long* ptr) { _numa_all_nodes = ptr; }
   static int sched_getcpu_syscall(void);
+
+  static int create_tmpfile(const char* dir, size_t size, bool exec);
+  static char* reserve_memory_with_backing_file_aligned(size_t size, size_t alignment, int fd);
+  static char* reserve_memory_with_backing_file_at(size_t bytes, char* requested_addr, int fd);
+
+
  public:
   static int sched_getcpu()  { return _sched_getcpu != NULL ? _sched_getcpu() : -1; }
   static int numa_node_to_cpus(int node, unsigned long *buffer, int bufferlen) {
     return _numa_node_to_cpus != NULL ? _numa_node_to_cpus(node, buffer, bufferlen) : -1;
   }