30 // Information about the protection of the page at address '0' on this os.

    30 // Information about the protection of the page at address '0' on this os.

    31 static bool zero_page_read_protected() { return true; }

    31 static bool zero_page_read_protected() { return true; }

    32 

    32 

    33 class Linux {

    33 class Linux {

    34   friend class os;

    34   friend class os;

    35   friend class TestReserveMemorySpecial;

    36   friend class TestReserveMemorySpecial;

    36 

    37 

    37   static bool libjsig_is_loaded;        // libjsig that interposes sigaction(),

    38   static bool libjsig_is_loaded;        // libjsig that interposes sigaction(),

    38                                         // __sigaction(), signal() is loaded

    39                                         // __sigaction(), signal() is loaded

    39   static struct sigaction *(*get_signal_action)(int);

    40   static struct sigaction *(*get_signal_action)(int);

    73   static Mutex* _createThread_lock;

    74   static Mutex* _createThread_lock;

    74   static int _page_size;

    75   static int _page_size;

    75 

    76 

    76   static julong available_memory();

    77   static julong available_memory();

    77   static julong physical_memory() { return _physical_memory; }

    78   static julong physical_memory() { return _physical_memory; }

    78   static void initialize_system_info();

    82   static void initialize_system_info();

    79 

    83 

    80   static int commit_memory_impl(char* addr, size_t bytes, bool exec);

    84   static int commit_memory_impl(char* addr, size_t bytes, bool exec);

    81   static int commit_memory_impl(char* addr, size_t bytes,

    85   static int commit_memory_impl(char* addr, size_t bytes,

    82                                 size_t alignment_hint, bool exec);

    86                                 size_t alignment_hint, bool exec);

   104   static bool release_memory_special_impl(char* base, size_t bytes);

   108   static bool release_memory_special_impl(char* base, size_t bytes);

   105   static bool release_memory_special_shm(char* base, size_t bytes);

   109   static bool release_memory_special_shm(char* base, size_t bytes);

   106   static bool release_memory_special_huge_tlbfs(char* base, size_t bytes);

   110   static bool release_memory_special_huge_tlbfs(char* base, size_t bytes);

   107 

   111 

   108   static void print_full_memory_info(outputStream* st);

   112   static void print_full_memory_info(outputStream* st);

   109   static void print_distro_info(outputStream* st);

   114   static void print_distro_info(outputStream* st);

   110   static void print_libversion_info(outputStream* st);

   115   static void print_libversion_info(outputStream* st);

   111 

   116 

   112  public:

   117  public:

   113   static bool _stack_is_executable;

   118   static bool _stack_is_executable;