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rev 4531 : 8013398: Adjust number of stack guard pages on systems with large memory page size
Summary: Auto adjust number of stack guard pages on systems with large memory page size
Reviewed-by: bobv, coleenp
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--- old/src/os/linux/vm/os_linux.hpp
+++ new/src/os/linux/vm/os_linux.hpp
1 1 /*
2 2 * Copyright (c) 1999, 2012, Oracle and/or its affiliates. All rights reserved.
3 3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
4 4 *
5 5 * This code is free software; you can redistribute it and/or modify it
6 6 * under the terms of the GNU General Public License version 2 only, as
7 7 * published by the Free Software Foundation.
8 8 *
9 9 * This code is distributed in the hope that it will be useful, but WITHOUT
10 10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
11 11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
12 12 * version 2 for more details (a copy is included in the LICENSE file that
13 13 * accompanied this code).
14 14 *
15 15 * You should have received a copy of the GNU General Public License version
16 16 * 2 along with this work; if not, write to the Free Software Foundation,
17 17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
18 18 *
19 19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
20 20 * or visit www.oracle.com if you need additional information or have any
21 21 * questions.
22 22 *
23 23 */
24 24
25 25 #ifndef OS_LINUX_VM_OS_LINUX_HPP
26 26 #define OS_LINUX_VM_OS_LINUX_HPP
27 27
28 28 // Linux_OS defines the interface to Linux operating systems
29 29
30 30 /* pthread_getattr_np comes with LinuxThreads-0.9-7 on RedHat 7.1 */
31 31 typedef int (*pthread_getattr_func_type) (pthread_t, pthread_attr_t *);
32 32
33 33 class Linux {
34 34 friend class os;
35 35
36 36 // For signal-chaining
37 37 #define MAXSIGNUM 32
38 38 static struct sigaction sigact[MAXSIGNUM]; // saved preinstalled sigactions
39 39 static unsigned int sigs; // mask of signals that have
40 40 // preinstalled signal handlers
41 41 static bool libjsig_is_loaded; // libjsig that interposes sigaction(),
42 42 // __sigaction(), signal() is loaded
43 43 static struct sigaction *(*get_signal_action)(int);
44 44 static struct sigaction *get_preinstalled_handler(int);
45 45 static void save_preinstalled_handler(int, struct sigaction&);
46 46
47 47 static void check_signal_handler(int sig);
48 48
49 49 // For signal flags diagnostics
50 50 static int sigflags[MAXSIGNUM];
51 51
52 52 static int (*_clock_gettime)(clockid_t, struct timespec *);
53 53 static int (*_pthread_getcpuclockid)(pthread_t, clockid_t *);
54 54
55 55 static address _initial_thread_stack_bottom;
56 56 static uintptr_t _initial_thread_stack_size;
57 57
58 58 static const char *_glibc_version;
59 59 static const char *_libpthread_version;
60 60
61 61 static bool _is_floating_stack;
62 62 static bool _is_NPTL;
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63 63 static bool _supports_fast_thread_cpu_time;
64 64
65 65 static GrowableArray<int>* _cpu_to_node;
66 66
67 67 protected:
68 68
69 69 static julong _physical_memory;
70 70 static pthread_t _main_thread;
71 71 static Mutex* _createThread_lock;
72 72 static int _page_size;
73 + static const int _vm_default_page_size;
73 74
74 75 static julong available_memory();
75 76 static julong physical_memory() { return _physical_memory; }
76 77 static void initialize_system_info();
77 78
78 79 static void set_glibc_version(const char *s) { _glibc_version = s; }
79 80 static void set_libpthread_version(const char *s) { _libpthread_version = s; }
80 81
81 82 static bool supports_variable_stack_size();
82 83
83 84 static void set_is_NPTL() { _is_NPTL = true; }
84 85 static void set_is_LinuxThreads() { _is_NPTL = false; }
85 86 static void set_is_floating_stack() { _is_floating_stack = true; }
86 87
87 88 static void rebuild_cpu_to_node_map();
88 89 static GrowableArray<int>* cpu_to_node() { return _cpu_to_node; }
89 90
90 91 static bool hugetlbfs_sanity_check(bool warn, size_t page_size);
91 92
92 93 static void print_full_memory_info(outputStream* st);
93 94 static void print_distro_info(outputStream* st);
94 95 static void print_libversion_info(outputStream* st);
95 96
96 97 public:
97 98 static bool _stack_is_executable;
98 99 static void *dlopen_helper(const char *name, char *ebuf, int ebuflen);
99 100 static void *dll_load_in_vmthread(const char *name, char *ebuf, int ebuflen);
100 101
101 102 static void init_thread_fpu_state();
102 103 static int get_fpu_control_word();
103 104 static void set_fpu_control_word(int fpu_control);
104 105 static pthread_t main_thread(void) { return _main_thread; }
105 106 // returns kernel thread id (similar to LWP id on Solaris), which can be
106 107 // used to access /proc
107 108 static pid_t gettid();
108 109 static void set_createThread_lock(Mutex* lk) { _createThread_lock = lk; }
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109 110 static Mutex* createThread_lock(void) { return _createThread_lock; }
110 111 static void hotspot_sigmask(Thread* thread);
111 112
112 113 static address initial_thread_stack_bottom(void) { return _initial_thread_stack_bottom; }
113 114 static uintptr_t initial_thread_stack_size(void) { return _initial_thread_stack_size; }
114 115 static bool is_initial_thread(void);
115 116
116 117 static int page_size(void) { return _page_size; }
117 118 static void set_page_size(int val) { _page_size = val; }
118 119
120 + static int vm_default_page_size(void) { return _vm_default_page_size; }
121 +
119 122 static address ucontext_get_pc(ucontext_t* uc);
120 123 static intptr_t* ucontext_get_sp(ucontext_t* uc);
121 124 static intptr_t* ucontext_get_fp(ucontext_t* uc);
122 125
123 126 // For Analyzer Forte AsyncGetCallTrace profiling support:
124 127 //
125 128 // This interface should be declared in os_linux_i486.hpp, but
126 129 // that file provides extensions to the os class and not the
127 130 // Linux class.
128 131 static ExtendedPC fetch_frame_from_ucontext(Thread* thread, ucontext_t* uc,
129 132 intptr_t** ret_sp, intptr_t** ret_fp);
130 133
131 134 // This boolean allows users to forward their own non-matching signals
132 135 // to JVM_handle_linux_signal, harmlessly.
133 136 static bool signal_handlers_are_installed;
134 137
135 138 static int get_our_sigflags(int);
136 139 static void set_our_sigflags(int, int);
137 140 static void signal_sets_init();
138 141 static void install_signal_handlers();
139 142 static void set_signal_handler(int, bool);
140 143 static bool is_sig_ignored(int sig);
141 144
142 145 static sigset_t* unblocked_signals();
143 146 static sigset_t* vm_signals();
144 147 static sigset_t* allowdebug_blocked_signals();
145 148
146 149 // For signal-chaining
147 150 static struct sigaction *get_chained_signal_action(int sig);
148 151 static bool chained_handler(int sig, siginfo_t* siginfo, void* context);
149 152
150 153 // GNU libc and libpthread version strings
151 154 static const char *glibc_version() { return _glibc_version; }
152 155 static const char *libpthread_version() { return _libpthread_version; }
153 156
154 157 // NPTL or LinuxThreads?
155 158 static bool is_LinuxThreads() { return !_is_NPTL; }
156 159 static bool is_NPTL() { return _is_NPTL; }
157 160
158 161 // NPTL is always floating stack. LinuxThreads could be using floating
159 162 // stack or fixed stack.
160 163 static bool is_floating_stack() { return _is_floating_stack; }
161 164
162 165 static void libpthread_init();
163 166 static bool libnuma_init();
164 167 static void* libnuma_dlsym(void* handle, const char* name);
165 168 // Minimum stack size a thread can be created with (allowing
166 169 // the VM to completely create the thread and enter user code)
167 170 static size_t min_stack_allowed;
168 171
169 172 // Return default stack size or guard size for the specified thread type
170 173 static size_t default_stack_size(os::ThreadType thr_type);
171 174 static size_t default_guard_size(os::ThreadType thr_type);
172 175
173 176 static void capture_initial_stack(size_t max_size);
174 177
175 178 // Stack overflow handling
176 179 static bool manually_expand_stack(JavaThread * t, address addr);
177 180 static int max_register_window_saves_before_flushing();
178 181
179 182 // Real-time clock functions
180 183 static void clock_init(void);
181 184
182 185 // fast POSIX clocks support
183 186 static void fast_thread_clock_init(void);
184 187
185 188 static inline bool supports_monotonic_clock() {
186 189 return _clock_gettime != NULL;
187 190 }
188 191
189 192 static int clock_gettime(clockid_t clock_id, struct timespec *tp) {
190 193 return _clock_gettime ? _clock_gettime(clock_id, tp) : -1;
191 194 }
192 195
193 196 static int pthread_getcpuclockid(pthread_t tid, clockid_t *clock_id) {
194 197 return _pthread_getcpuclockid ? _pthread_getcpuclockid(tid, clock_id) : -1;
195 198 }
196 199
197 200 static bool supports_fast_thread_cpu_time() {
198 201 return _supports_fast_thread_cpu_time;
199 202 }
200 203
201 204 static jlong fast_thread_cpu_time(clockid_t clockid);
202 205
203 206 // Stack repair handling
204 207
205 208 // none present
206 209
207 210 // LinuxThreads work-around for 6292965
208 211 static int safe_cond_timedwait(pthread_cond_t *_cond, pthread_mutex_t *_mutex, const struct timespec *_abstime);
209 212
210 213 private:
211 214 typedef int (*sched_getcpu_func_t)(void);
212 215 typedef int (*numa_node_to_cpus_func_t)(int node, unsigned long *buffer, int bufferlen);
213 216 typedef int (*numa_max_node_func_t)(void);
214 217 typedef int (*numa_available_func_t)(void);
215 218 typedef int (*numa_tonode_memory_func_t)(void *start, size_t size, int node);
216 219 typedef void (*numa_interleave_memory_func_t)(void *start, size_t size, unsigned long *nodemask);
217 220
218 221 static sched_getcpu_func_t _sched_getcpu;
219 222 static numa_node_to_cpus_func_t _numa_node_to_cpus;
220 223 static numa_max_node_func_t _numa_max_node;
221 224 static numa_available_func_t _numa_available;
222 225 static numa_tonode_memory_func_t _numa_tonode_memory;
223 226 static numa_interleave_memory_func_t _numa_interleave_memory;
224 227 static unsigned long* _numa_all_nodes;
225 228
226 229 static void set_sched_getcpu(sched_getcpu_func_t func) { _sched_getcpu = func; }
227 230 static void set_numa_node_to_cpus(numa_node_to_cpus_func_t func) { _numa_node_to_cpus = func; }
228 231 static void set_numa_max_node(numa_max_node_func_t func) { _numa_max_node = func; }
229 232 static void set_numa_available(numa_available_func_t func) { _numa_available = func; }
230 233 static void set_numa_tonode_memory(numa_tonode_memory_func_t func) { _numa_tonode_memory = func; }
231 234 static void set_numa_interleave_memory(numa_interleave_memory_func_t func) { _numa_interleave_memory = func; }
232 235 static void set_numa_all_nodes(unsigned long* ptr) { _numa_all_nodes = ptr; }
233 236 static int sched_getcpu_syscall(void);
234 237 public:
235 238 static int sched_getcpu() { return _sched_getcpu != NULL ? _sched_getcpu() : -1; }
236 239 static int numa_node_to_cpus(int node, unsigned long *buffer, int bufferlen) {
237 240 return _numa_node_to_cpus != NULL ? _numa_node_to_cpus(node, buffer, bufferlen) : -1;
238 241 }
239 242 static int numa_max_node() { return _numa_max_node != NULL ? _numa_max_node() : -1; }
240 243 static int numa_available() { return _numa_available != NULL ? _numa_available() : -1; }
241 244 static int numa_tonode_memory(void *start, size_t size, int node) {
242 245 return _numa_tonode_memory != NULL ? _numa_tonode_memory(start, size, node) : -1;
243 246 }
244 247 static void numa_interleave_memory(void *start, size_t size) {
245 248 if (_numa_interleave_memory != NULL && _numa_all_nodes != NULL) {
246 249 _numa_interleave_memory(start, size, _numa_all_nodes);
247 250 }
248 251 }
249 252 static int get_node_by_cpu(int cpu_id);
250 253 };
251 254
252 255
253 256 class PlatformEvent : public CHeapObj<mtInternal> {
254 257 private:
255 258 double CachePad [4] ; // increase odds that _mutex is sole occupant of cache line
256 259 volatile int _Event ;
257 260 volatile int _nParked ;
258 261 pthread_mutex_t _mutex [1] ;
259 262 pthread_cond_t _cond [1] ;
260 263 double PostPad [2] ;
261 264 Thread * _Assoc ;
262 265
263 266 public: // TODO-FIXME: make dtor private
264 267 ~PlatformEvent() { guarantee (0, "invariant") ; }
265 268
266 269 public:
267 270 PlatformEvent() {
268 271 int status;
269 272 status = pthread_cond_init (_cond, NULL);
270 273 assert_status(status == 0, status, "cond_init");
271 274 status = pthread_mutex_init (_mutex, NULL);
272 275 assert_status(status == 0, status, "mutex_init");
273 276 _Event = 0 ;
274 277 _nParked = 0 ;
275 278 _Assoc = NULL ;
276 279 }
277 280
278 281 // Use caution with reset() and fired() -- they may require MEMBARs
279 282 void reset() { _Event = 0 ; }
280 283 int fired() { return _Event; }
281 284 void park () ;
282 285 void unpark () ;
283 286 int TryPark () ;
284 287 int park (jlong millis) ;
285 288 void SetAssociation (Thread * a) { _Assoc = a ; }
286 289 } ;
287 290
288 291 class PlatformParker : public CHeapObj<mtInternal> {
289 292 protected:
290 293 pthread_mutex_t _mutex [1] ;
291 294 pthread_cond_t _cond [1] ;
292 295
293 296 public: // TODO-FIXME: make dtor private
294 297 ~PlatformParker() { guarantee (0, "invariant") ; }
295 298
296 299 public:
297 300 PlatformParker() {
298 301 int status;
299 302 status = pthread_cond_init (_cond, NULL);
300 303 assert_status(status == 0, status, "cond_init");
301 304 status = pthread_mutex_init (_mutex, NULL);
302 305 assert_status(status == 0, status, "mutex_init");
303 306 }
304 307 };
305 308
306 309 #endif // OS_LINUX_VM_OS_LINUX_HPP
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