Mercurial > hg > graal-compiler
annotate src/os/linux/vm/os_linux.hpp @ 11375:1a110b7c03e1
Use smaller epsilon in ComputeProbabilityClosure
author | Gilles Duboscq <duboscq@ssw.jku.at> |
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date | Tue, 20 Aug 2013 15:39:58 +0200 |
parents | a837fa3d3f86 |
children | 4c84d351cca9 88c255656030 |
rev | line source |
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0 | 1 /* |
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2 * Copyright (c) 1999, 2013, Oracle and/or its affiliates. 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 * | |
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19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
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20 * or visit www.oracle.com if you need additional information or have any |
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21 * questions. |
0 | 22 * |
23 */ | |
24 | |
1972 | 25 #ifndef OS_LINUX_VM_OS_LINUX_HPP |
26 #define OS_LINUX_VM_OS_LINUX_HPP | |
27 | |
0 | 28 // Linux_OS defines the interface to Linux operating systems |
29 | |
30 /* pthread_getattr_np comes with LinuxThreads-0.9-7 on RedHat 7.1 */ | |
31 typedef int (*pthread_getattr_func_type) (pthread_t, pthread_attr_t *); | |
32 | |
33 class Linux { | |
34 friend class os; | |
35 | |
36 // For signal-chaining | |
37 #define MAXSIGNUM 32 | |
38 static struct sigaction sigact[MAXSIGNUM]; // saved preinstalled sigactions | |
39 static unsigned int sigs; // mask of signals that have | |
40 // preinstalled signal handlers | |
41 static bool libjsig_is_loaded; // libjsig that interposes sigaction(), | |
42 // __sigaction(), signal() is loaded | |
43 static struct sigaction *(*get_signal_action)(int); | |
44 static struct sigaction *get_preinstalled_handler(int); | |
45 static void save_preinstalled_handler(int, struct sigaction&); | |
46 | |
47 static void check_signal_handler(int sig); | |
48 | |
49 // For signal flags diagnostics | |
50 static int sigflags[MAXSIGNUM]; | |
51 | |
52 static int (*_clock_gettime)(clockid_t, struct timespec *); | |
53 static int (*_pthread_getcpuclockid)(pthread_t, clockid_t *); | |
54 | |
55 static address _initial_thread_stack_bottom; | |
56 static uintptr_t _initial_thread_stack_size; | |
57 | |
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58 static const char *_glibc_version; |
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59 static const char *_libpthread_version; |
0 | 60 |
61 static bool _is_floating_stack; | |
62 static bool _is_NPTL; | |
63 static bool _supports_fast_thread_cpu_time; | |
64 | |
141 | 65 static GrowableArray<int>* _cpu_to_node; |
66 | |
0 | 67 protected: |
68 | |
69 static julong _physical_memory; | |
70 static pthread_t _main_thread; | |
71 static Mutex* _createThread_lock; | |
72 static int _page_size; | |
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73 static const int _vm_default_page_size; |
0 | 74 |
75 static julong available_memory(); | |
76 static julong physical_memory() { return _physical_memory; } | |
77 static void initialize_system_info(); | |
78 | |
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79 static int commit_memory_impl(char* addr, size_t bytes, bool exec); |
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80 static int commit_memory_impl(char* addr, size_t bytes, |
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81 size_t alignment_hint, bool exec); |
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82 |
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83 static void set_glibc_version(const char *s) { _glibc_version = s; } |
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84 static void set_libpthread_version(const char *s) { _libpthread_version = s; } |
0 | 85 |
86 static bool supports_variable_stack_size(); | |
87 | |
88 static void set_is_NPTL() { _is_NPTL = true; } | |
89 static void set_is_LinuxThreads() { _is_NPTL = false; } | |
90 static void set_is_floating_stack() { _is_floating_stack = true; } | |
91 | |
141 | 92 static void rebuild_cpu_to_node_map(); |
93 static GrowableArray<int>* cpu_to_node() { return _cpu_to_node; } | |
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94 |
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95 static bool hugetlbfs_sanity_check(bool warn, size_t page_size); |
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96 |
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97 static void print_full_memory_info(outputStream* st); |
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98 static void print_distro_info(outputStream* st); |
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99 static void print_libversion_info(outputStream* st); |
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100 |
0 | 101 public: |
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102 static bool _stack_is_executable; |
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103 static void *dlopen_helper(const char *name, char *ebuf, int ebuflen); |
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104 static void *dll_load_in_vmthread(const char *name, char *ebuf, int ebuflen); |
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105 |
0 | 106 static void init_thread_fpu_state(); |
107 static int get_fpu_control_word(); | |
108 static void set_fpu_control_word(int fpu_control); | |
109 static pthread_t main_thread(void) { return _main_thread; } | |
110 // returns kernel thread id (similar to LWP id on Solaris), which can be | |
111 // used to access /proc | |
112 static pid_t gettid(); | |
113 static void set_createThread_lock(Mutex* lk) { _createThread_lock = lk; } | |
114 static Mutex* createThread_lock(void) { return _createThread_lock; } | |
115 static void hotspot_sigmask(Thread* thread); | |
116 | |
117 static address initial_thread_stack_bottom(void) { return _initial_thread_stack_bottom; } | |
118 static uintptr_t initial_thread_stack_size(void) { return _initial_thread_stack_size; } | |
119 static bool is_initial_thread(void); | |
120 | |
121 static int page_size(void) { return _page_size; } | |
122 static void set_page_size(int val) { _page_size = val; } | |
123 | |
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124 static int vm_default_page_size(void) { return _vm_default_page_size; } |
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125 |
0 | 126 static address ucontext_get_pc(ucontext_t* uc); |
127 static intptr_t* ucontext_get_sp(ucontext_t* uc); | |
128 static intptr_t* ucontext_get_fp(ucontext_t* uc); | |
129 | |
130 // For Analyzer Forte AsyncGetCallTrace profiling support: | |
131 // | |
132 // This interface should be declared in os_linux_i486.hpp, but | |
133 // that file provides extensions to the os class and not the | |
134 // Linux class. | |
135 static ExtendedPC fetch_frame_from_ucontext(Thread* thread, ucontext_t* uc, | |
136 intptr_t** ret_sp, intptr_t** ret_fp); | |
137 | |
138 // This boolean allows users to forward their own non-matching signals | |
139 // to JVM_handle_linux_signal, harmlessly. | |
140 static bool signal_handlers_are_installed; | |
141 | |
142 static int get_our_sigflags(int); | |
143 static void set_our_sigflags(int, int); | |
144 static void signal_sets_init(); | |
145 static void install_signal_handlers(); | |
146 static void set_signal_handler(int, bool); | |
147 static bool is_sig_ignored(int sig); | |
148 | |
149 static sigset_t* unblocked_signals(); | |
150 static sigset_t* vm_signals(); | |
151 static sigset_t* allowdebug_blocked_signals(); | |
152 | |
153 // For signal-chaining | |
154 static struct sigaction *get_chained_signal_action(int sig); | |
155 static bool chained_handler(int sig, siginfo_t* siginfo, void* context); | |
156 | |
157 // GNU libc and libpthread version strings | |
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158 static const char *glibc_version() { return _glibc_version; } |
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159 static const char *libpthread_version() { return _libpthread_version; } |
0 | 160 |
161 // NPTL or LinuxThreads? | |
162 static bool is_LinuxThreads() { return !_is_NPTL; } | |
163 static bool is_NPTL() { return _is_NPTL; } | |
164 | |
165 // NPTL is always floating stack. LinuxThreads could be using floating | |
166 // stack or fixed stack. | |
167 static bool is_floating_stack() { return _is_floating_stack; } | |
168 | |
169 static void libpthread_init(); | |
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170 static bool libnuma_init(); |
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171 static void* libnuma_dlsym(void* handle, const char* name); |
0 | 172 // Minimum stack size a thread can be created with (allowing |
173 // the VM to completely create the thread and enter user code) | |
174 static size_t min_stack_allowed; | |
175 | |
176 // Return default stack size or guard size for the specified thread type | |
177 static size_t default_stack_size(os::ThreadType thr_type); | |
178 static size_t default_guard_size(os::ThreadType thr_type); | |
179 | |
180 static void capture_initial_stack(size_t max_size); | |
181 | |
182 // Stack overflow handling | |
183 static bool manually_expand_stack(JavaThread * t, address addr); | |
184 static int max_register_window_saves_before_flushing(); | |
185 | |
186 // Real-time clock functions | |
187 static void clock_init(void); | |
188 | |
189 // fast POSIX clocks support | |
190 static void fast_thread_clock_init(void); | |
191 | |
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192 static inline bool supports_monotonic_clock() { |
0 | 193 return _clock_gettime != NULL; |
194 } | |
195 | |
196 static int clock_gettime(clockid_t clock_id, struct timespec *tp) { | |
197 return _clock_gettime ? _clock_gettime(clock_id, tp) : -1; | |
198 } | |
199 | |
200 static int pthread_getcpuclockid(pthread_t tid, clockid_t *clock_id) { | |
201 return _pthread_getcpuclockid ? _pthread_getcpuclockid(tid, clock_id) : -1; | |
202 } | |
203 | |
204 static bool supports_fast_thread_cpu_time() { | |
205 return _supports_fast_thread_cpu_time; | |
206 } | |
207 | |
208 static jlong fast_thread_cpu_time(clockid_t clockid); | |
209 | |
210 // Stack repair handling | |
211 | |
212 // none present | |
213 | |
214 // LinuxThreads work-around for 6292965 | |
215 static int safe_cond_timedwait(pthread_cond_t *_cond, pthread_mutex_t *_mutex, const struct timespec *_abstime); | |
216 | |
141 | 217 private: |
218 typedef int (*sched_getcpu_func_t)(void); | |
219 typedef int (*numa_node_to_cpus_func_t)(int node, unsigned long *buffer, int bufferlen); | |
220 typedef int (*numa_max_node_func_t)(void); | |
221 typedef int (*numa_available_func_t)(void); | |
222 typedef int (*numa_tonode_memory_func_t)(void *start, size_t size, int node); | |
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223 typedef void (*numa_interleave_memory_func_t)(void *start, size_t size, unsigned long *nodemask); |
141 | 224 |
225 static sched_getcpu_func_t _sched_getcpu; | |
226 static numa_node_to_cpus_func_t _numa_node_to_cpus; | |
227 static numa_max_node_func_t _numa_max_node; | |
228 static numa_available_func_t _numa_available; | |
229 static numa_tonode_memory_func_t _numa_tonode_memory; | |
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230 static numa_interleave_memory_func_t _numa_interleave_memory; |
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231 static unsigned long* _numa_all_nodes; |
141 | 232 |
233 static void set_sched_getcpu(sched_getcpu_func_t func) { _sched_getcpu = func; } | |
234 static void set_numa_node_to_cpus(numa_node_to_cpus_func_t func) { _numa_node_to_cpus = func; } | |
235 static void set_numa_max_node(numa_max_node_func_t func) { _numa_max_node = func; } | |
236 static void set_numa_available(numa_available_func_t func) { _numa_available = func; } | |
237 static void set_numa_tonode_memory(numa_tonode_memory_func_t func) { _numa_tonode_memory = func; } | |
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238 static void set_numa_interleave_memory(numa_interleave_memory_func_t func) { _numa_interleave_memory = func; } |
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239 static void set_numa_all_nodes(unsigned long* ptr) { _numa_all_nodes = ptr; } |
3826 | 240 static int sched_getcpu_syscall(void); |
141 | 241 public: |
242 static int sched_getcpu() { return _sched_getcpu != NULL ? _sched_getcpu() : -1; } | |
243 static int numa_node_to_cpus(int node, unsigned long *buffer, int bufferlen) { | |
244 return _numa_node_to_cpus != NULL ? _numa_node_to_cpus(node, buffer, bufferlen) : -1; | |
245 } | |
246 static int numa_max_node() { return _numa_max_node != NULL ? _numa_max_node() : -1; } | |
247 static int numa_available() { return _numa_available != NULL ? _numa_available() : -1; } | |
248 static int numa_tonode_memory(void *start, size_t size, int node) { | |
249 return _numa_tonode_memory != NULL ? _numa_tonode_memory(start, size, node) : -1; | |
250 } | |
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251 static void numa_interleave_memory(void *start, size_t size) { |
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252 if (_numa_interleave_memory != NULL && _numa_all_nodes != NULL) { |
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253 _numa_interleave_memory(start, size, _numa_all_nodes); |
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254 } |
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255 } |
141 | 256 static int get_node_by_cpu(int cpu_id); |
0 | 257 }; |
258 | |
259 | |
6197 | 260 class PlatformEvent : public CHeapObj<mtInternal> { |
0 | 261 private: |
262 double CachePad [4] ; // increase odds that _mutex is sole occupant of cache line | |
263 volatile int _Event ; | |
264 volatile int _nParked ; | |
265 pthread_mutex_t _mutex [1] ; | |
266 pthread_cond_t _cond [1] ; | |
267 double PostPad [2] ; | |
268 Thread * _Assoc ; | |
269 | |
270 public: // TODO-FIXME: make dtor private | |
271 ~PlatformEvent() { guarantee (0, "invariant") ; } | |
272 | |
273 public: | |
274 PlatformEvent() { | |
275 int status; | |
276 status = pthread_cond_init (_cond, NULL); | |
277 assert_status(status == 0, status, "cond_init"); | |
278 status = pthread_mutex_init (_mutex, NULL); | |
279 assert_status(status == 0, status, "mutex_init"); | |
280 _Event = 0 ; | |
281 _nParked = 0 ; | |
282 _Assoc = NULL ; | |
283 } | |
284 | |
285 // Use caution with reset() and fired() -- they may require MEMBARs | |
286 void reset() { _Event = 0 ; } | |
287 int fired() { return _Event; } | |
288 void park () ; | |
289 void unpark () ; | |
290 int TryPark () ; | |
291 int park (jlong millis) ; | |
292 void SetAssociation (Thread * a) { _Assoc = a ; } | |
293 } ; | |
294 | |
6197 | 295 class PlatformParker : public CHeapObj<mtInternal> { |
0 | 296 protected: |
297 pthread_mutex_t _mutex [1] ; | |
298 pthread_cond_t _cond [1] ; | |
299 | |
300 public: // TODO-FIXME: make dtor private | |
301 ~PlatformParker() { guarantee (0, "invariant") ; } | |
302 | |
303 public: | |
304 PlatformParker() { | |
305 int status; | |
306 status = pthread_cond_init (_cond, NULL); | |
307 assert_status(status == 0, status, "cond_init"); | |
308 status = pthread_mutex_init (_mutex, NULL); | |
309 assert_status(status == 0, status, "mutex_init"); | |
310 } | |
10405 | 311 }; |
1972 | 312 |
313 #endif // OS_LINUX_VM_OS_LINUX_HPP |