Mercurial > hg > truffle
annotate src/os/linux/vm/os_linux.hpp @ 656:6bdd6923ba16
6541756: Reduce executable C-heap
Summary: Add executable parameters to reserve_memory and commit_memory to reduce executable memory to only the Code Heap.
Reviewed-by: xlu, kvn, acorn
author | coleenp |
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date | Wed, 25 Mar 2009 14:19:20 -0400 |
parents | 85f1b9537f70 |
children | cf71f149d7ae |
rev | line source |
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0 | 1 /* |
196 | 2 * Copyright 1999-2008 Sun Microsystems, Inc. All Rights Reserved. |
0 | 3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
4 * | |
5 * This code is free software; you can redistribute it and/or modify it | |
6 * under the terms of the GNU General Public License version 2 only, as | |
7 * published by the Free Software Foundation. | |
8 * | |
9 * This code is distributed in the hope that it will be useful, but WITHOUT | |
10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or | |
11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License | |
12 * version 2 for more details (a copy is included in the LICENSE file that | |
13 * accompanied this code). | |
14 * | |
15 * You should have received a copy of the GNU General Public License version | |
16 * 2 along with this work; if not, write to the Free Software Foundation, | |
17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. | |
18 * | |
19 * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara, | |
20 * CA 95054 USA or visit www.sun.com if you need additional information or | |
21 * have any questions. | |
22 * | |
23 */ | |
24 | |
25 // Linux_OS defines the interface to Linux operating systems | |
26 | |
27 /* pthread_getattr_np comes with LinuxThreads-0.9-7 on RedHat 7.1 */ | |
28 typedef int (*pthread_getattr_func_type) (pthread_t, pthread_attr_t *); | |
29 | |
30 class Linux { | |
31 friend class os; | |
32 | |
33 // For signal-chaining | |
34 #define MAXSIGNUM 32 | |
35 static struct sigaction sigact[MAXSIGNUM]; // saved preinstalled sigactions | |
36 static unsigned int sigs; // mask of signals that have | |
37 // preinstalled signal handlers | |
38 static bool libjsig_is_loaded; // libjsig that interposes sigaction(), | |
39 // __sigaction(), signal() is loaded | |
40 static struct sigaction *(*get_signal_action)(int); | |
41 static struct sigaction *get_preinstalled_handler(int); | |
42 static void save_preinstalled_handler(int, struct sigaction&); | |
43 | |
44 static void check_signal_handler(int sig); | |
45 | |
46 // For signal flags diagnostics | |
47 static int sigflags[MAXSIGNUM]; | |
48 | |
49 static int (*_clock_gettime)(clockid_t, struct timespec *); | |
50 static int (*_pthread_getcpuclockid)(pthread_t, clockid_t *); | |
51 | |
52 static address _initial_thread_stack_bottom; | |
53 static uintptr_t _initial_thread_stack_size; | |
54 | |
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55 static const char *_glibc_version; |
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56 static const char *_libpthread_version; |
0 | 57 |
58 static bool _is_floating_stack; | |
59 static bool _is_NPTL; | |
60 static bool _supports_fast_thread_cpu_time; | |
61 | |
141 | 62 static GrowableArray<int>* _cpu_to_node; |
63 | |
0 | 64 protected: |
65 | |
66 static julong _physical_memory; | |
67 static pthread_t _main_thread; | |
68 static Mutex* _createThread_lock; | |
69 static int _page_size; | |
70 | |
71 static julong available_memory(); | |
72 static julong physical_memory() { return _physical_memory; } | |
73 static void initialize_system_info(); | |
74 | |
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75 static void set_glibc_version(const char *s) { _glibc_version = s; } |
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76 static void set_libpthread_version(const char *s) { _libpthread_version = s; } |
0 | 77 |
78 static bool supports_variable_stack_size(); | |
79 | |
80 static void set_is_NPTL() { _is_NPTL = true; } | |
81 static void set_is_LinuxThreads() { _is_NPTL = false; } | |
82 static void set_is_floating_stack() { _is_floating_stack = true; } | |
83 | |
141 | 84 static void rebuild_cpu_to_node_map(); |
85 static GrowableArray<int>* cpu_to_node() { return _cpu_to_node; } | |
0 | 86 public: |
87 static void init_thread_fpu_state(); | |
88 static int get_fpu_control_word(); | |
89 static void set_fpu_control_word(int fpu_control); | |
90 static pthread_t main_thread(void) { return _main_thread; } | |
91 // returns kernel thread id (similar to LWP id on Solaris), which can be | |
92 // used to access /proc | |
93 static pid_t gettid(); | |
94 static void set_createThread_lock(Mutex* lk) { _createThread_lock = lk; } | |
95 static Mutex* createThread_lock(void) { return _createThread_lock; } | |
96 static void hotspot_sigmask(Thread* thread); | |
97 | |
98 static address initial_thread_stack_bottom(void) { return _initial_thread_stack_bottom; } | |
99 static uintptr_t initial_thread_stack_size(void) { return _initial_thread_stack_size; } | |
100 static bool is_initial_thread(void); | |
101 | |
102 static int page_size(void) { return _page_size; } | |
103 static void set_page_size(int val) { _page_size = val; } | |
104 | |
105 static address ucontext_get_pc(ucontext_t* uc); | |
106 static intptr_t* ucontext_get_sp(ucontext_t* uc); | |
107 static intptr_t* ucontext_get_fp(ucontext_t* uc); | |
108 | |
109 // For Analyzer Forte AsyncGetCallTrace profiling support: | |
110 // | |
111 // This interface should be declared in os_linux_i486.hpp, but | |
112 // that file provides extensions to the os class and not the | |
113 // Linux class. | |
114 static ExtendedPC fetch_frame_from_ucontext(Thread* thread, ucontext_t* uc, | |
115 intptr_t** ret_sp, intptr_t** ret_fp); | |
116 | |
117 // This boolean allows users to forward their own non-matching signals | |
118 // to JVM_handle_linux_signal, harmlessly. | |
119 static bool signal_handlers_are_installed; | |
120 | |
121 static int get_our_sigflags(int); | |
122 static void set_our_sigflags(int, int); | |
123 static void signal_sets_init(); | |
124 static void install_signal_handlers(); | |
125 static void set_signal_handler(int, bool); | |
126 static bool is_sig_ignored(int sig); | |
127 | |
128 static sigset_t* unblocked_signals(); | |
129 static sigset_t* vm_signals(); | |
130 static sigset_t* allowdebug_blocked_signals(); | |
131 | |
132 // For signal-chaining | |
133 static struct sigaction *get_chained_signal_action(int sig); | |
134 static bool chained_handler(int sig, siginfo_t* siginfo, void* context); | |
135 | |
136 // GNU libc and libpthread version strings | |
199
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137 static const char *glibc_version() { return _glibc_version; } |
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138 static const char *libpthread_version() { return _libpthread_version; } |
0 | 139 |
140 // NPTL or LinuxThreads? | |
141 static bool is_LinuxThreads() { return !_is_NPTL; } | |
142 static bool is_NPTL() { return _is_NPTL; } | |
143 | |
144 // NPTL is always floating stack. LinuxThreads could be using floating | |
145 // stack or fixed stack. | |
146 static bool is_floating_stack() { return _is_floating_stack; } | |
147 | |
148 static void libpthread_init(); | |
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149 static bool libnuma_init(); |
0 | 150 |
151 // Minimum stack size a thread can be created with (allowing | |
152 // the VM to completely create the thread and enter user code) | |
153 static size_t min_stack_allowed; | |
154 | |
155 // Return default stack size or guard size for the specified thread type | |
156 static size_t default_stack_size(os::ThreadType thr_type); | |
157 static size_t default_guard_size(os::ThreadType thr_type); | |
158 | |
159 static void capture_initial_stack(size_t max_size); | |
160 | |
161 // Stack overflow handling | |
162 static bool manually_expand_stack(JavaThread * t, address addr); | |
163 static int max_register_window_saves_before_flushing(); | |
164 | |
165 // Real-time clock functions | |
166 static void clock_init(void); | |
167 | |
168 // fast POSIX clocks support | |
169 static void fast_thread_clock_init(void); | |
170 | |
171 static bool supports_monotonic_clock() { | |
172 return _clock_gettime != NULL; | |
173 } | |
174 | |
175 static int clock_gettime(clockid_t clock_id, struct timespec *tp) { | |
176 return _clock_gettime ? _clock_gettime(clock_id, tp) : -1; | |
177 } | |
178 | |
179 static int pthread_getcpuclockid(pthread_t tid, clockid_t *clock_id) { | |
180 return _pthread_getcpuclockid ? _pthread_getcpuclockid(tid, clock_id) : -1; | |
181 } | |
182 | |
183 static bool supports_fast_thread_cpu_time() { | |
184 return _supports_fast_thread_cpu_time; | |
185 } | |
186 | |
187 static jlong fast_thread_cpu_time(clockid_t clockid); | |
188 | |
189 // Stack repair handling | |
190 | |
191 // none present | |
192 | |
193 // LinuxThreads work-around for 6292965 | |
194 static int safe_cond_timedwait(pthread_cond_t *_cond, pthread_mutex_t *_mutex, const struct timespec *_abstime); | |
195 | |
196 | |
197 // Linux suspend/resume support - this helper is a shadow of its former | |
198 // self now that low-level suspension is barely used, and old workarounds | |
199 // for LinuxThreads are no longer needed. | |
200 class SuspendResume { | |
201 private: | |
202 volatile int _suspend_action; | |
203 // values for suspend_action: | |
204 #define SR_NONE (0x00) | |
205 #define SR_SUSPEND (0x01) // suspend request | |
206 #define SR_CONTINUE (0x02) // resume request | |
207 | |
208 volatile jint _state; | |
209 // values for _state: + SR_NONE | |
210 #define SR_SUSPENDED (0x20) | |
211 public: | |
212 SuspendResume() { _suspend_action = SR_NONE; _state = SR_NONE; } | |
213 | |
214 int suspend_action() const { return _suspend_action; } | |
215 void set_suspend_action(int x) { _suspend_action = x; } | |
216 | |
217 // atomic updates for _state | |
218 void set_suspended() { | |
219 jint temp, temp2; | |
220 do { | |
221 temp = _state; | |
222 temp2 = Atomic::cmpxchg(temp | SR_SUSPENDED, &_state, temp); | |
223 } while (temp2 != temp); | |
224 } | |
225 void clear_suspended() { | |
226 jint temp, temp2; | |
227 do { | |
228 temp = _state; | |
229 temp2 = Atomic::cmpxchg(temp & ~SR_SUSPENDED, &_state, temp); | |
230 } while (temp2 != temp); | |
231 } | |
232 bool is_suspended() { return _state & SR_SUSPENDED; } | |
233 | |
234 #undef SR_SUSPENDED | |
235 }; | |
141 | 236 |
237 private: | |
238 typedef int (*sched_getcpu_func_t)(void); | |
239 typedef int (*numa_node_to_cpus_func_t)(int node, unsigned long *buffer, int bufferlen); | |
240 typedef int (*numa_max_node_func_t)(void); | |
241 typedef int (*numa_available_func_t)(void); | |
242 typedef int (*numa_tonode_memory_func_t)(void *start, size_t size, int node); | |
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243 typedef void (*numa_interleave_memory_func_t)(void *start, size_t size, unsigned long *nodemask); |
141 | 244 |
245 static sched_getcpu_func_t _sched_getcpu; | |
246 static numa_node_to_cpus_func_t _numa_node_to_cpus; | |
247 static numa_max_node_func_t _numa_max_node; | |
248 static numa_available_func_t _numa_available; | |
249 static numa_tonode_memory_func_t _numa_tonode_memory; | |
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250 static numa_interleave_memory_func_t _numa_interleave_memory; |
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251 static unsigned long* _numa_all_nodes; |
141 | 252 |
253 static void set_sched_getcpu(sched_getcpu_func_t func) { _sched_getcpu = func; } | |
254 static void set_numa_node_to_cpus(numa_node_to_cpus_func_t func) { _numa_node_to_cpus = func; } | |
255 static void set_numa_max_node(numa_max_node_func_t func) { _numa_max_node = func; } | |
256 static void set_numa_available(numa_available_func_t func) { _numa_available = func; } | |
257 static void set_numa_tonode_memory(numa_tonode_memory_func_t func) { _numa_tonode_memory = func; } | |
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258 static void set_numa_interleave_memory(numa_interleave_memory_func_t func) { _numa_interleave_memory = func; } |
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259 static void set_numa_all_nodes(unsigned long* ptr) { _numa_all_nodes = ptr; } |
141 | 260 public: |
261 static int sched_getcpu() { return _sched_getcpu != NULL ? _sched_getcpu() : -1; } | |
262 static int numa_node_to_cpus(int node, unsigned long *buffer, int bufferlen) { | |
263 return _numa_node_to_cpus != NULL ? _numa_node_to_cpus(node, buffer, bufferlen) : -1; | |
264 } | |
265 static int numa_max_node() { return _numa_max_node != NULL ? _numa_max_node() : -1; } | |
266 static int numa_available() { return _numa_available != NULL ? _numa_available() : -1; } | |
267 static int numa_tonode_memory(void *start, size_t size, int node) { | |
268 return _numa_tonode_memory != NULL ? _numa_tonode_memory(start, size, node) : -1; | |
269 } | |
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270 static void numa_interleave_memory(void *start, size_t size) { |
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271 if (_numa_interleave_memory != NULL && _numa_all_nodes != NULL) { |
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272 _numa_interleave_memory(start, size, _numa_all_nodes); |
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273 } |
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274 } |
141 | 275 static int get_node_by_cpu(int cpu_id); |
0 | 276 }; |
277 | |
278 | |
279 class PlatformEvent : public CHeapObj { | |
280 private: | |
281 double CachePad [4] ; // increase odds that _mutex is sole occupant of cache line | |
282 volatile int _Event ; | |
283 volatile int _nParked ; | |
284 pthread_mutex_t _mutex [1] ; | |
285 pthread_cond_t _cond [1] ; | |
286 double PostPad [2] ; | |
287 Thread * _Assoc ; | |
288 | |
289 public: // TODO-FIXME: make dtor private | |
290 ~PlatformEvent() { guarantee (0, "invariant") ; } | |
291 | |
292 public: | |
293 PlatformEvent() { | |
294 int status; | |
295 status = pthread_cond_init (_cond, NULL); | |
296 assert_status(status == 0, status, "cond_init"); | |
297 status = pthread_mutex_init (_mutex, NULL); | |
298 assert_status(status == 0, status, "mutex_init"); | |
299 _Event = 0 ; | |
300 _nParked = 0 ; | |
301 _Assoc = NULL ; | |
302 } | |
303 | |
304 // Use caution with reset() and fired() -- they may require MEMBARs | |
305 void reset() { _Event = 0 ; } | |
306 int fired() { return _Event; } | |
307 void park () ; | |
308 void unpark () ; | |
309 int TryPark () ; | |
310 int park (jlong millis) ; | |
311 void SetAssociation (Thread * a) { _Assoc = a ; } | |
312 } ; | |
313 | |
314 class PlatformParker : public CHeapObj { | |
315 protected: | |
316 pthread_mutex_t _mutex [1] ; | |
317 pthread_cond_t _cond [1] ; | |
318 | |
319 public: // TODO-FIXME: make dtor private | |
320 ~PlatformParker() { guarantee (0, "invariant") ; } | |
321 | |
322 public: | |
323 PlatformParker() { | |
324 int status; | |
325 status = pthread_cond_init (_cond, NULL); | |
326 assert_status(status == 0, status, "cond_init"); | |
327 status = pthread_mutex_init (_mutex, NULL); | |
328 assert_status(status == 0, status, "mutex_init"); | |
329 } | |
330 } ; |