179   static bool chained_handler(int sig, siginfo_t* siginfo, void* context);
 180 
 181   // GNU libc and libpthread version strings
 182   static const char *glibc_version()          { return _glibc_version; }
 183   static const char *libpthread_version()     { return _libpthread_version; }
 184 
 185   static void libpthread_init();
 186   static void sched_getcpu_init();
 187   static bool libnuma_init();
 188   static void* libnuma_dlsym(void* handle, const char* name);
 189   // libnuma v2 (libnuma_1.2) symbols
 190   static void* libnuma_v2_dlsym(void* handle, const char* name);
 191 
 192   // Return default guard size for the specified thread type
 193   static size_t default_guard_size(os::ThreadType thr_type);
 194 
 195   static void capture_initial_stack(size_t max_size);
 196 
 197   // Stack overflow handling
 198   static bool manually_expand_stack(JavaThread * t, address addr);
 199   static int max_register_window_saves_before_flushing();
 200 
 201   // fast POSIX clocks support
 202   static void fast_thread_clock_init(void);
 203 
 204   static int pthread_getcpuclockid(pthread_t tid, clockid_t *clock_id) {
 205     return _pthread_getcpuclockid ? _pthread_getcpuclockid(tid, clock_id) : -1;
 206   }
 207 
 208   static bool supports_fast_thread_cpu_time() {
 209     return _supports_fast_thread_cpu_time;
 210   }
 211 
 212   static jlong fast_thread_cpu_time(clockid_t clockid);
 213 
 214   static void initialize_os_info();
 215   static bool os_version_is_known();
 216   static uint32_t os_version();
 217 
 218   // Stack repair handling
 219 
 220   // none present
 221 
 222  private:
 223   static void numa_init();
 224   static void expand_stack_to(address bottom);
 225 
 226   typedef int (*sched_getcpu_func_t)(void);
 227   typedef int (*numa_node_to_cpus_func_t)(int node, unsigned long *buffer, int bufferlen);
 228   typedef int (*numa_max_node_func_t)(void);
 229   typedef int (*numa_num_configured_nodes_func_t)(void);
 230   typedef int (*numa_available_func_t)(void);
 231   typedef int (*numa_tonode_memory_func_t)(void *start, size_t size, int node);
 232   typedef void (*numa_interleave_memory_func_t)(void *start, size_t size, unsigned long *nodemask);
 233   typedef void (*numa_interleave_memory_v2_func_t)(void *start, size_t size, struct bitmask* mask);
 234   typedef struct bitmask* (*numa_get_membind_func_t)(void);
 235   typedef struct bitmask* (*numa_get_interleave_mask_func_t)(void);

 179   static bool chained_handler(int sig, siginfo_t* siginfo, void* context);
 180 
 181   // GNU libc and libpthread version strings
 182   static const char *glibc_version()          { return _glibc_version; }
 183   static const char *libpthread_version()     { return _libpthread_version; }
 184 
 185   static void libpthread_init();
 186   static void sched_getcpu_init();
 187   static bool libnuma_init();
 188   static void* libnuma_dlsym(void* handle, const char* name);
 189   // libnuma v2 (libnuma_1.2) symbols
 190   static void* libnuma_v2_dlsym(void* handle, const char* name);
 191 
 192   // Return default guard size for the specified thread type
 193   static size_t default_guard_size(os::ThreadType thr_type);
 194 
 195   static void capture_initial_stack(size_t max_size);
 196 
 197   // Stack overflow handling
 198   static bool manually_expand_stack(JavaThread * t, address addr);

 199 
 200   // fast POSIX clocks support
 201   static void fast_thread_clock_init(void);
 202 
 203   static int pthread_getcpuclockid(pthread_t tid, clockid_t *clock_id) {
 204     return _pthread_getcpuclockid ? _pthread_getcpuclockid(tid, clock_id) : -1;
 205   }
 206 
 207   static bool supports_fast_thread_cpu_time() {
 208     return _supports_fast_thread_cpu_time;
 209   }
 210 
 211   static jlong fast_thread_cpu_time(clockid_t clockid);
 212 
 213   static void initialize_os_info();

 214   static uint32_t os_version();
 215 
 216   // Stack repair handling
 217 
 218   // none present
 219 
 220  private:
 221   static void numa_init();
 222   static void expand_stack_to(address bottom);
 223 
 224   typedef int (*sched_getcpu_func_t)(void);
 225   typedef int (*numa_node_to_cpus_func_t)(int node, unsigned long *buffer, int bufferlen);
 226   typedef int (*numa_max_node_func_t)(void);
 227   typedef int (*numa_num_configured_nodes_func_t)(void);
 228   typedef int (*numa_available_func_t)(void);
 229   typedef int (*numa_tonode_memory_func_t)(void *start, size_t size, int node);
 230   typedef void (*numa_interleave_memory_func_t)(void *start, size_t size, unsigned long *nodemask);
 231   typedef void (*numa_interleave_memory_v2_func_t)(void *start, size_t size, struct bitmask* mask);
 232   typedef struct bitmask* (*numa_get_membind_func_t)(void);
 233   typedef struct bitmask* (*numa_get_interleave_mask_func_t)(void);