Mercurial > hg > truffle
annotate src/os/linux/vm/os_linux.hpp @ 13360:cf7b5b507541
Merge.
author | Christian Humer <christian.humer@gmail.com> |
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date | Tue, 17 Dec 2013 15:44:23 +0100 |
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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; | |
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35 friend class TestReserveMemorySpecial; |
0 | 36 |
37 // For signal-chaining | |
38 #define MAXSIGNUM 32 | |
39 static struct sigaction sigact[MAXSIGNUM]; // saved preinstalled sigactions | |
40 static unsigned int sigs; // mask of signals that have | |
41 // preinstalled signal handlers | |
42 static bool libjsig_is_loaded; // libjsig that interposes sigaction(), | |
43 // __sigaction(), signal() is loaded | |
44 static struct sigaction *(*get_signal_action)(int); | |
45 static struct sigaction *get_preinstalled_handler(int); | |
46 static void save_preinstalled_handler(int, struct sigaction&); | |
47 | |
48 static void check_signal_handler(int sig); | |
49 | |
50 // For signal flags diagnostics | |
51 static int sigflags[MAXSIGNUM]; | |
52 | |
53 static int (*_clock_gettime)(clockid_t, struct timespec *); | |
54 static int (*_pthread_getcpuclockid)(pthread_t, clockid_t *); | |
55 | |
56 static address _initial_thread_stack_bottom; | |
57 static uintptr_t _initial_thread_stack_size; | |
58 | |
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59 static const char *_glibc_version; |
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60 static const char *_libpthread_version; |
0 | 61 |
62 static bool _is_floating_stack; | |
63 static bool _is_NPTL; | |
64 static bool _supports_fast_thread_cpu_time; | |
65 | |
141 | 66 static GrowableArray<int>* _cpu_to_node; |
67 | |
0 | 68 protected: |
69 | |
70 static julong _physical_memory; | |
71 static pthread_t _main_thread; | |
72 static Mutex* _createThread_lock; | |
73 static int _page_size; | |
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74 static const int _vm_default_page_size; |
0 | 75 |
76 static julong available_memory(); | |
77 static julong physical_memory() { return _physical_memory; } | |
78 static void initialize_system_info(); | |
79 | |
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80 static int commit_memory_impl(char* addr, size_t bytes, bool exec); |
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81 static int commit_memory_impl(char* addr, size_t bytes, |
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82 size_t alignment_hint, bool exec); |
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83 |
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84 static void set_glibc_version(const char *s) { _glibc_version = s; } |
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85 static void set_libpthread_version(const char *s) { _libpthread_version = s; } |
0 | 86 |
87 static bool supports_variable_stack_size(); | |
88 | |
89 static void set_is_NPTL() { _is_NPTL = true; } | |
90 static void set_is_LinuxThreads() { _is_NPTL = false; } | |
91 static void set_is_floating_stack() { _is_floating_stack = true; } | |
92 | |
141 | 93 static void rebuild_cpu_to_node_map(); |
94 static GrowableArray<int>* cpu_to_node() { return _cpu_to_node; } | |
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95 |
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96 static size_t find_large_page_size(); |
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97 static size_t setup_large_page_size(); |
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98 |
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99 static bool setup_large_page_type(size_t page_size); |
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100 static bool transparent_huge_pages_sanity_check(bool warn, size_t pages_size); |
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101 static bool hugetlbfs_sanity_check(bool warn, size_t page_size); |
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102 |
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103 static char* reserve_memory_special_shm(size_t bytes, size_t alignment, char* req_addr, bool exec); |
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104 static char* reserve_memory_special_huge_tlbfs(size_t bytes, size_t alignment, char* req_addr, bool exec); |
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105 static char* reserve_memory_special_huge_tlbfs_only(size_t bytes, char* req_addr, bool exec); |
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106 static char* reserve_memory_special_huge_tlbfs_mixed(size_t bytes, size_t alignment, char* req_addr, bool exec); |
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107 |
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108 static bool release_memory_special_shm(char* base, size_t bytes); |
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109 static bool release_memory_special_huge_tlbfs(char* base, size_t bytes); |
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110 |
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111 static void print_full_memory_info(outputStream* st); |
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112 static void print_distro_info(outputStream* st); |
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113 static void print_libversion_info(outputStream* st); |
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114 |
0 | 115 public: |
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116 static bool _stack_is_executable; |
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117 static void *dlopen_helper(const char *name, char *ebuf, int ebuflen); |
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118 static void *dll_load_in_vmthread(const char *name, char *ebuf, int ebuflen); |
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119 |
0 | 120 static void init_thread_fpu_state(); |
121 static int get_fpu_control_word(); | |
122 static void set_fpu_control_word(int fpu_control); | |
123 static pthread_t main_thread(void) { return _main_thread; } | |
124 // returns kernel thread id (similar to LWP id on Solaris), which can be | |
125 // used to access /proc | |
126 static pid_t gettid(); | |
127 static void set_createThread_lock(Mutex* lk) { _createThread_lock = lk; } | |
128 static Mutex* createThread_lock(void) { return _createThread_lock; } | |
129 static void hotspot_sigmask(Thread* thread); | |
130 | |
131 static address initial_thread_stack_bottom(void) { return _initial_thread_stack_bottom; } | |
132 static uintptr_t initial_thread_stack_size(void) { return _initial_thread_stack_size; } | |
133 static bool is_initial_thread(void); | |
134 | |
135 static int page_size(void) { return _page_size; } | |
136 static void set_page_size(int val) { _page_size = val; } | |
137 | |
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138 static int vm_default_page_size(void) { return _vm_default_page_size; } |
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139 |
0 | 140 static address ucontext_get_pc(ucontext_t* uc); |
141 static intptr_t* ucontext_get_sp(ucontext_t* uc); | |
142 static intptr_t* ucontext_get_fp(ucontext_t* uc); | |
143 | |
144 // For Analyzer Forte AsyncGetCallTrace profiling support: | |
145 // | |
146 // This interface should be declared in os_linux_i486.hpp, but | |
147 // that file provides extensions to the os class and not the | |
148 // Linux class. | |
149 static ExtendedPC fetch_frame_from_ucontext(Thread* thread, ucontext_t* uc, | |
150 intptr_t** ret_sp, intptr_t** ret_fp); | |
151 | |
152 // This boolean allows users to forward their own non-matching signals | |
153 // to JVM_handle_linux_signal, harmlessly. | |
154 static bool signal_handlers_are_installed; | |
155 | |
156 static int get_our_sigflags(int); | |
157 static void set_our_sigflags(int, int); | |
158 static void signal_sets_init(); | |
159 static void install_signal_handlers(); | |
160 static void set_signal_handler(int, bool); | |
161 static bool is_sig_ignored(int sig); | |
162 | |
163 static sigset_t* unblocked_signals(); | |
164 static sigset_t* vm_signals(); | |
165 static sigset_t* allowdebug_blocked_signals(); | |
166 | |
167 // For signal-chaining | |
168 static struct sigaction *get_chained_signal_action(int sig); | |
169 static bool chained_handler(int sig, siginfo_t* siginfo, void* context); | |
170 | |
171 // GNU libc and libpthread version strings | |
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172 static const char *glibc_version() { return _glibc_version; } |
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173 static const char *libpthread_version() { return _libpthread_version; } |
0 | 174 |
175 // NPTL or LinuxThreads? | |
176 static bool is_LinuxThreads() { return !_is_NPTL; } | |
177 static bool is_NPTL() { return _is_NPTL; } | |
178 | |
179 // NPTL is always floating stack. LinuxThreads could be using floating | |
180 // stack or fixed stack. | |
181 static bool is_floating_stack() { return _is_floating_stack; } | |
182 | |
183 static void libpthread_init(); | |
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184 static bool libnuma_init(); |
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185 static void* libnuma_dlsym(void* handle, const char* name); |
0 | 186 // Minimum stack size a thread can be created with (allowing |
187 // the VM to completely create the thread and enter user code) | |
188 static size_t min_stack_allowed; | |
189 | |
190 // Return default stack size or guard size for the specified thread type | |
191 static size_t default_stack_size(os::ThreadType thr_type); | |
192 static size_t default_guard_size(os::ThreadType thr_type); | |
193 | |
194 static void capture_initial_stack(size_t max_size); | |
195 | |
196 // Stack overflow handling | |
197 static bool manually_expand_stack(JavaThread * t, address addr); | |
198 static int max_register_window_saves_before_flushing(); | |
199 | |
200 // Real-time clock functions | |
201 static void clock_init(void); | |
202 | |
203 // fast POSIX clocks support | |
204 static void fast_thread_clock_init(void); | |
205 | |
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206 static inline bool supports_monotonic_clock() { |
0 | 207 return _clock_gettime != NULL; |
208 } | |
209 | |
210 static int clock_gettime(clockid_t clock_id, struct timespec *tp) { | |
211 return _clock_gettime ? _clock_gettime(clock_id, tp) : -1; | |
212 } | |
213 | |
214 static int pthread_getcpuclockid(pthread_t tid, clockid_t *clock_id) { | |
215 return _pthread_getcpuclockid ? _pthread_getcpuclockid(tid, clock_id) : -1; | |
216 } | |
217 | |
218 static bool supports_fast_thread_cpu_time() { | |
219 return _supports_fast_thread_cpu_time; | |
220 } | |
221 | |
222 static jlong fast_thread_cpu_time(clockid_t clockid); | |
223 | |
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224 // pthread_cond clock suppport |
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225 private: |
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226 static pthread_condattr_t _condattr[1]; |
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227 |
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228 public: |
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229 static pthread_condattr_t* condAttr() { return _condattr; } |
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230 |
0 | 231 // Stack repair handling |
232 | |
233 // none present | |
234 | |
235 // LinuxThreads work-around for 6292965 | |
236 static int safe_cond_timedwait(pthread_cond_t *_cond, pthread_mutex_t *_mutex, const struct timespec *_abstime); | |
237 | |
141 | 238 private: |
239 typedef int (*sched_getcpu_func_t)(void); | |
240 typedef int (*numa_node_to_cpus_func_t)(int node, unsigned long *buffer, int bufferlen); | |
241 typedef int (*numa_max_node_func_t)(void); | |
242 typedef int (*numa_available_func_t)(void); | |
243 typedef int (*numa_tonode_memory_func_t)(void *start, size_t size, int node); | |
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244 typedef void (*numa_interleave_memory_func_t)(void *start, size_t size, unsigned long *nodemask); |
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245 typedef void (*numa_set_bind_policy_func_t)(int policy); |
141 | 246 |
247 static sched_getcpu_func_t _sched_getcpu; | |
248 static numa_node_to_cpus_func_t _numa_node_to_cpus; | |
249 static numa_max_node_func_t _numa_max_node; | |
250 static numa_available_func_t _numa_available; | |
251 static numa_tonode_memory_func_t _numa_tonode_memory; | |
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252 static numa_interleave_memory_func_t _numa_interleave_memory; |
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253 static numa_set_bind_policy_func_t _numa_set_bind_policy; |
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254 static unsigned long* _numa_all_nodes; |
141 | 255 |
256 static void set_sched_getcpu(sched_getcpu_func_t func) { _sched_getcpu = func; } | |
257 static void set_numa_node_to_cpus(numa_node_to_cpus_func_t func) { _numa_node_to_cpus = func; } | |
258 static void set_numa_max_node(numa_max_node_func_t func) { _numa_max_node = func; } | |
259 static void set_numa_available(numa_available_func_t func) { _numa_available = func; } | |
260 static void set_numa_tonode_memory(numa_tonode_memory_func_t func) { _numa_tonode_memory = func; } | |
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261 static void set_numa_interleave_memory(numa_interleave_memory_func_t func) { _numa_interleave_memory = func; } |
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262 static void set_numa_set_bind_policy(numa_set_bind_policy_func_t func) { _numa_set_bind_policy = func; } |
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263 static void set_numa_all_nodes(unsigned long* ptr) { _numa_all_nodes = ptr; } |
3826 | 264 static int sched_getcpu_syscall(void); |
141 | 265 public: |
266 static int sched_getcpu() { return _sched_getcpu != NULL ? _sched_getcpu() : -1; } | |
267 static int numa_node_to_cpus(int node, unsigned long *buffer, int bufferlen) { | |
268 return _numa_node_to_cpus != NULL ? _numa_node_to_cpus(node, buffer, bufferlen) : -1; | |
269 } | |
270 static int numa_max_node() { return _numa_max_node != NULL ? _numa_max_node() : -1; } | |
271 static int numa_available() { return _numa_available != NULL ? _numa_available() : -1; } | |
272 static int numa_tonode_memory(void *start, size_t size, int node) { | |
273 return _numa_tonode_memory != NULL ? _numa_tonode_memory(start, size, node) : -1; | |
274 } | |
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275 static void numa_interleave_memory(void *start, size_t size) { |
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276 if (_numa_interleave_memory != NULL && _numa_all_nodes != NULL) { |
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277 _numa_interleave_memory(start, size, _numa_all_nodes); |
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278 } |
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279 } |
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280 static void numa_set_bind_policy(int policy) { |
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281 if (_numa_set_bind_policy != NULL) { |
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282 _numa_set_bind_policy(policy); |
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283 } |
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284 } |
141 | 285 static int get_node_by_cpu(int cpu_id); |
0 | 286 }; |
287 | |
288 | |
6197 | 289 class PlatformEvent : public CHeapObj<mtInternal> { |
0 | 290 private: |
291 double CachePad [4] ; // increase odds that _mutex is sole occupant of cache line | |
292 volatile int _Event ; | |
293 volatile int _nParked ; | |
294 pthread_mutex_t _mutex [1] ; | |
295 pthread_cond_t _cond [1] ; | |
296 double PostPad [2] ; | |
297 Thread * _Assoc ; | |
298 | |
299 public: // TODO-FIXME: make dtor private | |
300 ~PlatformEvent() { guarantee (0, "invariant") ; } | |
301 | |
302 public: | |
303 PlatformEvent() { | |
304 int status; | |
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305 status = pthread_cond_init (_cond, os::Linux::condAttr()); |
0 | 306 assert_status(status == 0, status, "cond_init"); |
307 status = pthread_mutex_init (_mutex, NULL); | |
308 assert_status(status == 0, status, "mutex_init"); | |
309 _Event = 0 ; | |
310 _nParked = 0 ; | |
311 _Assoc = NULL ; | |
312 } | |
313 | |
314 // Use caution with reset() and fired() -- they may require MEMBARs | |
315 void reset() { _Event = 0 ; } | |
316 int fired() { return _Event; } | |
317 void park () ; | |
318 void unpark () ; | |
319 int TryPark () ; | |
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320 int park (jlong millis) ; // relative timed-wait only |
0 | 321 void SetAssociation (Thread * a) { _Assoc = a ; } |
322 } ; | |
323 | |
6197 | 324 class PlatformParker : public CHeapObj<mtInternal> { |
0 | 325 protected: |
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326 enum { |
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327 REL_INDEX = 0, |
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328 ABS_INDEX = 1 |
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329 }; |
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330 int _cur_index; // which cond is in use: -1, 0, 1 |
0 | 331 pthread_mutex_t _mutex [1] ; |
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332 pthread_cond_t _cond [2] ; // one for relative times and one for abs. |
0 | 333 |
334 public: // TODO-FIXME: make dtor private | |
335 ~PlatformParker() { guarantee (0, "invariant") ; } | |
336 | |
337 public: | |
338 PlatformParker() { | |
339 int status; | |
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340 status = pthread_cond_init (&_cond[REL_INDEX], os::Linux::condAttr()); |
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341 assert_status(status == 0, status, "cond_init rel"); |
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342 status = pthread_cond_init (&_cond[ABS_INDEX], NULL); |
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343 assert_status(status == 0, status, "cond_init abs"); |
0 | 344 status = pthread_mutex_init (_mutex, NULL); |
345 assert_status(status == 0, status, "mutex_init"); | |
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346 _cur_index = -1; // mark as unused |
0 | 347 } |
10405 | 348 }; |
1972 | 349 |
350 #endif // OS_LINUX_VM_OS_LINUX_HPP |