173
174 // For signal-chaining
175 static struct sigaction *get_chained_signal_action(int sig);
176 static bool chained_handler(int sig, siginfo_t* siginfo, void* context);
177
178 // GNU libc and libpthread version strings
179 static const char *glibc_version() { return _glibc_version; }
180 static const char *libpthread_version() { return _libpthread_version; }
181
182 // NPTL or LinuxThreads?
183 static bool is_LinuxThreads() { return !_is_NPTL; }
184 static bool is_NPTL() { return _is_NPTL; }
185
186 // NPTL is always floating stack. LinuxThreads could be using floating
187 // stack or fixed stack.
188 static bool is_floating_stack() { return _is_floating_stack; }
189
190 static void libpthread_init();
191 static bool libnuma_init();
192 static void* libnuma_dlsym(void* handle, const char* name);
193 // Minimum stack size a thread can be created with (allowing
194 // the VM to completely create the thread and enter user code)
195 static size_t min_stack_allowed;
196
197 // Return default stack size or guard size for the specified thread type
198 static size_t default_stack_size(os::ThreadType thr_type);
199 static size_t default_guard_size(os::ThreadType thr_type);
200
201 static void capture_initial_stack(size_t max_size);
202
203 // Stack overflow handling
204 static bool manually_expand_stack(JavaThread * t, address addr);
205 static int max_register_window_saves_before_flushing();
206
207 // Real-time clock functions
208 static void clock_init(void);
209
210 // fast POSIX clocks support
211 static void fast_thread_clock_init(void);
212
233 static pthread_condattr_t _condattr[1];
234
235 public:
236 static pthread_condattr_t* condAttr() { return _condattr; }
237
238 // Stack repair handling
239
240 // none present
241
242 // LinuxThreads work-around for 6292965
243 static int safe_cond_timedwait(pthread_cond_t *_cond, pthread_mutex_t *_mutex, const struct timespec *_abstime);
244
245 private:
246 typedef int (*sched_getcpu_func_t)(void);
247 typedef int (*numa_node_to_cpus_func_t)(int node, unsigned long *buffer, int bufferlen);
248 typedef int (*numa_max_node_func_t)(void);
249 typedef int (*numa_num_configured_nodes_func_t)(void);
250 typedef int (*numa_available_func_t)(void);
251 typedef int (*numa_tonode_memory_func_t)(void *start, size_t size, int node);
252 typedef void (*numa_interleave_memory_func_t)(void *start, size_t size, unsigned long *nodemask);
253 typedef void (*numa_set_bind_policy_func_t)(int policy);
254 typedef int (*numa_bitmask_isbitset_func_t)(struct bitmask *bmp, unsigned int n);
255 typedef int (*numa_distance_func_t)(int node1, int node2);
256
257 static sched_getcpu_func_t _sched_getcpu;
258 static numa_node_to_cpus_func_t _numa_node_to_cpus;
259 static numa_max_node_func_t _numa_max_node;
260 static numa_num_configured_nodes_func_t _numa_num_configured_nodes;
261 static numa_available_func_t _numa_available;
262 static numa_tonode_memory_func_t _numa_tonode_memory;
263 static numa_interleave_memory_func_t _numa_interleave_memory;
264 static numa_set_bind_policy_func_t _numa_set_bind_policy;
265 static numa_bitmask_isbitset_func_t _numa_bitmask_isbitset;
266 static numa_distance_func_t _numa_distance;
267 static unsigned long* _numa_all_nodes;
268 static struct bitmask* _numa_all_nodes_ptr;
269 static struct bitmask* _numa_nodes_ptr;
270
271 static void set_sched_getcpu(sched_getcpu_func_t func) { _sched_getcpu = func; }
272 static void set_numa_node_to_cpus(numa_node_to_cpus_func_t func) { _numa_node_to_cpus = func; }
273 static void set_numa_max_node(numa_max_node_func_t func) { _numa_max_node = func; }
274 static void set_numa_num_configured_nodes(numa_num_configured_nodes_func_t func) { _numa_num_configured_nodes = func; }
275 static void set_numa_available(numa_available_func_t func) { _numa_available = func; }
276 static void set_numa_tonode_memory(numa_tonode_memory_func_t func) { _numa_tonode_memory = func; }
277 static void set_numa_interleave_memory(numa_interleave_memory_func_t func) { _numa_interleave_memory = func; }
278 static void set_numa_set_bind_policy(numa_set_bind_policy_func_t func) { _numa_set_bind_policy = func; }
279 static void set_numa_bitmask_isbitset(numa_bitmask_isbitset_func_t func) { _numa_bitmask_isbitset = func; }
280 static void set_numa_distance(numa_distance_func_t func) { _numa_distance = func; }
281 static void set_numa_all_nodes(unsigned long* ptr) { _numa_all_nodes = ptr; }
282 static void set_numa_all_nodes_ptr(struct bitmask **ptr) { _numa_all_nodes_ptr = *ptr; }
283 static void set_numa_nodes_ptr(struct bitmask **ptr) { _numa_nodes_ptr = *ptr; }
284 static int sched_getcpu_syscall(void);
285 public:
286 static int sched_getcpu() { return _sched_getcpu != NULL ? _sched_getcpu() : -1; }
287 static int numa_node_to_cpus(int node, unsigned long *buffer, int bufferlen) {
288 return _numa_node_to_cpus != NULL ? _numa_node_to_cpus(node, buffer, bufferlen) : -1;
289 }
290 static int numa_max_node() { return _numa_max_node != NULL ? _numa_max_node() : -1; }
291 static int numa_num_configured_nodes() {
292 return _numa_num_configured_nodes != NULL ? _numa_num_configured_nodes() : -1;
293 }
294 static int numa_available() { return _numa_available != NULL ? _numa_available() : -1; }
295 static int numa_tonode_memory(void *start, size_t size, int node) {
296 return _numa_tonode_memory != NULL ? _numa_tonode_memory(start, size, node) : -1;
297 }
298 static void numa_interleave_memory(void *start, size_t size) {
299 if (_numa_interleave_memory != NULL && _numa_all_nodes != NULL) {
300 _numa_interleave_memory(start, size, _numa_all_nodes);
301 }
302 }
303 static void numa_set_bind_policy(int policy) {
304 if (_numa_set_bind_policy != NULL) {
305 _numa_set_bind_policy(policy);
306 }
307 }
308 static int numa_distance(int node1, int node2) {
309 return _numa_distance != NULL ? _numa_distance(node1, node2) : -1;
310 }
311 static int get_node_by_cpu(int cpu_id);
312 static int get_existing_num_nodes();
313 // Check if numa node is configured (non-zero memory node).
314 static bool isnode_in_configured_nodes(unsigned int n) {
315 if (_numa_bitmask_isbitset != NULL && _numa_all_nodes_ptr != NULL) {
316 return _numa_bitmask_isbitset(_numa_all_nodes_ptr, n);
317 } else
318 return 0;
319 }
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173
174 // For signal-chaining
175 static struct sigaction *get_chained_signal_action(int sig);
176 static bool chained_handler(int sig, siginfo_t* siginfo, void* context);
177
178 // GNU libc and libpthread version strings
179 static const char *glibc_version() { return _glibc_version; }
180 static const char *libpthread_version() { return _libpthread_version; }
181
182 // NPTL or LinuxThreads?
183 static bool is_LinuxThreads() { return !_is_NPTL; }
184 static bool is_NPTL() { return _is_NPTL; }
185
186 // NPTL is always floating stack. LinuxThreads could be using floating
187 // stack or fixed stack.
188 static bool is_floating_stack() { return _is_floating_stack; }
189
190 static void libpthread_init();
191 static bool libnuma_init();
192 static void* libnuma_dlsym(void* handle, const char* name);
193 // libnuma v2 (libnuma_1.2) symbols
194 static void* libnuma_v2_dlsym(void* handle, const char* name);
195 // Minimum stack size a thread can be created with (allowing
196 // the VM to completely create the thread and enter user code)
197 static size_t min_stack_allowed;
198
199 // Return default stack size or guard size for the specified thread type
200 static size_t default_stack_size(os::ThreadType thr_type);
201 static size_t default_guard_size(os::ThreadType thr_type);
202
203 static void capture_initial_stack(size_t max_size);
204
205 // Stack overflow handling
206 static bool manually_expand_stack(JavaThread * t, address addr);
207 static int max_register_window_saves_before_flushing();
208
209 // Real-time clock functions
210 static void clock_init(void);
211
212 // fast POSIX clocks support
213 static void fast_thread_clock_init(void);
214
235 static pthread_condattr_t _condattr[1];
236
237 public:
238 static pthread_condattr_t* condAttr() { return _condattr; }
239
240 // Stack repair handling
241
242 // none present
243
244 // LinuxThreads work-around for 6292965
245 static int safe_cond_timedwait(pthread_cond_t *_cond, pthread_mutex_t *_mutex, const struct timespec *_abstime);
246
247 private:
248 typedef int (*sched_getcpu_func_t)(void);
249 typedef int (*numa_node_to_cpus_func_t)(int node, unsigned long *buffer, int bufferlen);
250 typedef int (*numa_max_node_func_t)(void);
251 typedef int (*numa_num_configured_nodes_func_t)(void);
252 typedef int (*numa_available_func_t)(void);
253 typedef int (*numa_tonode_memory_func_t)(void *start, size_t size, int node);
254 typedef void (*numa_interleave_memory_func_t)(void *start, size_t size, unsigned long *nodemask);
255 typedef void (*numa_interleave_memory_v2_func_t)(void *start, size_t size, struct bitmask* mask);
256
257 typedef void (*numa_set_bind_policy_func_t)(int policy);
258 typedef int (*numa_bitmask_isbitset_func_t)(struct bitmask *bmp, unsigned int n);
259 typedef int (*numa_distance_func_t)(int node1, int node2);
260
261 static sched_getcpu_func_t _sched_getcpu;
262 static numa_node_to_cpus_func_t _numa_node_to_cpus;
263 static numa_max_node_func_t _numa_max_node;
264 static numa_num_configured_nodes_func_t _numa_num_configured_nodes;
265 static numa_available_func_t _numa_available;
266 static numa_tonode_memory_func_t _numa_tonode_memory;
267 static numa_interleave_memory_func_t _numa_interleave_memory;
268 static numa_interleave_memory_v2_func_t _numa_interleave_memory_v2;
269 static numa_set_bind_policy_func_t _numa_set_bind_policy;
270 static numa_bitmask_isbitset_func_t _numa_bitmask_isbitset;
271 static numa_distance_func_t _numa_distance;
272 static unsigned long* _numa_all_nodes;
273 static struct bitmask* _numa_all_nodes_ptr;
274 static struct bitmask* _numa_nodes_ptr;
275
276 static void set_sched_getcpu(sched_getcpu_func_t func) { _sched_getcpu = func; }
277 static void set_numa_node_to_cpus(numa_node_to_cpus_func_t func) { _numa_node_to_cpus = func; }
278 static void set_numa_max_node(numa_max_node_func_t func) { _numa_max_node = func; }
279 static void set_numa_num_configured_nodes(numa_num_configured_nodes_func_t func) { _numa_num_configured_nodes = func; }
280 static void set_numa_available(numa_available_func_t func) { _numa_available = func; }
281 static void set_numa_tonode_memory(numa_tonode_memory_func_t func) { _numa_tonode_memory = func; }
282 static void set_numa_interleave_memory(numa_interleave_memory_func_t func) { _numa_interleave_memory = func; }
283 static void set_numa_interleave_memory_v2(numa_interleave_memory_v2_func_t func) { _numa_interleave_memory_v2 = func; }
284 static void set_numa_set_bind_policy(numa_set_bind_policy_func_t func) { _numa_set_bind_policy = func; }
285 static void set_numa_bitmask_isbitset(numa_bitmask_isbitset_func_t func) { _numa_bitmask_isbitset = func; }
286 static void set_numa_distance(numa_distance_func_t func) { _numa_distance = func; }
287 static void set_numa_all_nodes(unsigned long* ptr) { _numa_all_nodes = ptr; }
288 static void set_numa_all_nodes_ptr(struct bitmask **ptr) { _numa_all_nodes_ptr = *ptr; }
289 static void set_numa_nodes_ptr(struct bitmask **ptr) { _numa_nodes_ptr = *ptr; }
290 static int sched_getcpu_syscall(void);
291 public:
292 static int sched_getcpu() { return _sched_getcpu != NULL ? _sched_getcpu() : -1; }
293 static int numa_node_to_cpus(int node, unsigned long *buffer, int bufferlen) {
294 return _numa_node_to_cpus != NULL ? _numa_node_to_cpus(node, buffer, bufferlen) : -1;
295 }
296 static int numa_max_node() { return _numa_max_node != NULL ? _numa_max_node() : -1; }
297 static int numa_num_configured_nodes() {
298 return _numa_num_configured_nodes != NULL ? _numa_num_configured_nodes() : -1;
299 }
300 static int numa_available() { return _numa_available != NULL ? _numa_available() : -1; }
301 static int numa_tonode_memory(void *start, size_t size, int node) {
302 return _numa_tonode_memory != NULL ? _numa_tonode_memory(start, size, node) : -1;
303 }
304 static void numa_interleave_memory(void *start, size_t size) {
305 // Use v2 api if available
306 if (_numa_interleave_memory_v2 != NULL && _numa_all_nodes_ptr != NULL) {
307 _numa_interleave_memory_v2(start, size, _numa_all_nodes_ptr);
308 } else if (_numa_interleave_memory != NULL && _numa_all_nodes != NULL) {
309 _numa_interleave_memory(start, size, _numa_all_nodes);
310 }
311 }
312 static void numa_set_bind_policy(int policy) {
313 if (_numa_set_bind_policy != NULL) {
314 _numa_set_bind_policy(policy);
315 }
316 }
317 static int numa_distance(int node1, int node2) {
318 return _numa_distance != NULL ? _numa_distance(node1, node2) : -1;
319 }
320 static int get_node_by_cpu(int cpu_id);
321 static int get_existing_num_nodes();
322 // Check if numa node is configured (non-zero memory node).
323 static bool isnode_in_configured_nodes(unsigned int n) {
324 if (_numa_bitmask_isbitset != NULL && _numa_all_nodes_ptr != NULL) {
325 return _numa_bitmask_isbitset(_numa_all_nodes_ptr, n);
326 } else
327 return 0;
328 }
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