Mercurial > hg > truffle
annotate src/os/bsd/vm/os_bsd.hpp @ 21821:9a227eaac2dc
8050807: Better performing performance data handling
Reviewed-by: dcubed, pnauman, ctornqvi, dholmes, mschoene
Contributed-by: gerald.thornbrugh@oracle.com
| author | gthornbr |
|---|---|
| date | Mon, 17 Nov 2014 15:51:46 -0500 |
| parents | 917873d2983d |
| children | 52b4284cb496 |
| rev | line source |
|---|---|
| 3960 | 1 /* |
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2 * Copyright (c) 1999, 2013, Oracle and/or its affiliates. All rights reserved. |
| 3960 | 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 Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA | |
| 20 * or visit www.oracle.com if you need additional information or have any | |
| 21 * questions. | |
| 22 * | |
| 23 */ | |
| 24 | |
| 25 #ifndef OS_BSD_VM_OS_BSD_HPP | |
| 26 #define OS_BSD_VM_OS_BSD_HPP | |
| 27 | |
| 28 // Bsd_OS defines the interface to Bsd operating systems | |
| 29 | |
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30 // Information about the protection of the page at address '0' on this os. |
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31 static bool zero_page_read_protected() { return true; } |
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32 |
| 3960 | 33 /* pthread_getattr_np comes with BsdThreads-0.9-7 on RedHat 7.1 */ |
| 34 typedef int (*pthread_getattr_func_type) (pthread_t, pthread_attr_t *); | |
| 35 | |
| 36 #ifdef __APPLE__ | |
| 37 // Mac OS X doesn't support clock_gettime. Stub out the type, it is | |
| 38 // unused | |
| 39 typedef int clockid_t; | |
| 40 #endif | |
| 41 | |
| 42 class Bsd { | |
| 43 friend class os; | |
| 44 | |
| 45 // For signal-chaining | |
| 46 #define MAXSIGNUM 32 | |
| 47 static struct sigaction sigact[MAXSIGNUM]; // saved preinstalled sigactions | |
| 48 static unsigned int sigs; // mask of signals that have | |
| 49 // preinstalled signal handlers | |
| 50 static bool libjsig_is_loaded; // libjsig that interposes sigaction(), | |
| 51 // __sigaction(), signal() is loaded | |
| 52 static struct sigaction *(*get_signal_action)(int); | |
| 53 static struct sigaction *get_preinstalled_handler(int); | |
| 54 static void save_preinstalled_handler(int, struct sigaction&); | |
| 55 | |
| 56 static void check_signal_handler(int sig); | |
| 57 | |
| 58 // For signal flags diagnostics | |
| 59 static int sigflags[MAXSIGNUM]; | |
| 60 | |
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61 #ifdef __APPLE__ |
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62 // mach_absolute_time |
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63 static mach_timebase_info_data_t _timebase_info; |
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64 static volatile uint64_t _max_abstime; |
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65 #else |
| 3960 | 66 static int (*_clock_gettime)(clockid_t, struct timespec *); |
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67 #endif |
| 3960 | 68 |
| 69 static GrowableArray<int>* _cpu_to_node; | |
| 70 | |
| 71 protected: | |
| 72 | |
| 73 static julong _physical_memory; | |
| 74 static pthread_t _main_thread; | |
| 75 static int _page_size; | |
| 76 | |
| 77 static julong available_memory(); | |
| 78 static julong physical_memory() { return _physical_memory; } | |
| 79 static void initialize_system_info(); | |
| 80 | |
| 81 static bool supports_variable_stack_size(); | |
| 82 | |
| 83 static void rebuild_cpu_to_node_map(); | |
| 84 static GrowableArray<int>* cpu_to_node() { return _cpu_to_node; } | |
| 85 | |
| 86 static bool hugetlbfs_sanity_check(bool warn, size_t page_size); | |
| 87 | |
| 88 public: | |
| 89 | |
| 90 static void init_thread_fpu_state(); | |
| 91 static pthread_t main_thread(void) { return _main_thread; } | |
| 92 | |
| 93 static void hotspot_sigmask(Thread* thread); | |
| 94 | |
| 95 static bool is_initial_thread(void); | |
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96 static pid_t gettid(); |
| 3960 | 97 |
| 98 static int page_size(void) { return _page_size; } | |
| 99 static void set_page_size(int val) { _page_size = val; } | |
| 100 | |
| 101 static address ucontext_get_pc(ucontext_t* uc); | |
| 102 static intptr_t* ucontext_get_sp(ucontext_t* uc); | |
| 103 static intptr_t* ucontext_get_fp(ucontext_t* uc); | |
| 104 | |
| 105 // For Analyzer Forte AsyncGetCallTrace profiling support: | |
| 106 // | |
| 107 // This interface should be declared in os_bsd_i486.hpp, but | |
| 108 // that file provides extensions to the os class and not the | |
| 109 // Bsd class. | |
| 110 static ExtendedPC fetch_frame_from_ucontext(Thread* thread, ucontext_t* uc, | |
| 111 intptr_t** ret_sp, intptr_t** ret_fp); | |
| 112 | |
| 113 // This boolean allows users to forward their own non-matching signals | |
| 114 // to JVM_handle_bsd_signal, harmlessly. | |
| 115 static bool signal_handlers_are_installed; | |
| 116 | |
| 117 static int get_our_sigflags(int); | |
| 118 static void set_our_sigflags(int, int); | |
| 119 static void signal_sets_init(); | |
| 120 static void install_signal_handlers(); | |
| 121 static void set_signal_handler(int, bool); | |
| 122 static bool is_sig_ignored(int sig); | |
| 123 | |
| 124 static sigset_t* unblocked_signals(); | |
| 125 static sigset_t* vm_signals(); | |
| 126 static sigset_t* allowdebug_blocked_signals(); | |
| 127 | |
| 128 // For signal-chaining | |
| 129 static struct sigaction *get_chained_signal_action(int sig); | |
| 130 static bool chained_handler(int sig, siginfo_t* siginfo, void* context); | |
| 131 | |
| 132 // Minimum stack size a thread can be created with (allowing | |
| 133 // the VM to completely create the thread and enter user code) | |
| 134 static size_t min_stack_allowed; | |
| 135 | |
| 136 // Return default stack size or guard size for the specified thread type | |
| 137 static size_t default_stack_size(os::ThreadType thr_type); | |
| 138 static size_t default_guard_size(os::ThreadType thr_type); | |
| 139 | |
| 140 // Real-time clock functions | |
| 141 static void clock_init(void); | |
| 142 | |
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143 static inline bool supports_monotonic_clock() { |
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144 #ifdef __APPLE__ |
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145 return true; |
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146 #else |
| 3960 | 147 return _clock_gettime != NULL; |
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148 #endif |
| 3960 | 149 } |
| 150 | |
| 151 // Stack repair handling | |
| 152 | |
| 153 // none present | |
| 154 | |
| 155 // BsdThreads work-around for 6292965 | |
| 156 static int safe_cond_timedwait(pthread_cond_t *_cond, pthread_mutex_t *_mutex, const struct timespec *_abstime); | |
| 157 | |
| 158 private: | |
| 159 typedef int (*sched_getcpu_func_t)(void); | |
| 160 typedef int (*numa_node_to_cpus_func_t)(int node, unsigned long *buffer, int bufferlen); | |
| 161 typedef int (*numa_max_node_func_t)(void); | |
| 162 typedef int (*numa_available_func_t)(void); | |
| 163 typedef int (*numa_tonode_memory_func_t)(void *start, size_t size, int node); | |
| 164 typedef void (*numa_interleave_memory_func_t)(void *start, size_t size, unsigned long *nodemask); | |
| 165 | |
| 166 static sched_getcpu_func_t _sched_getcpu; | |
| 167 static numa_node_to_cpus_func_t _numa_node_to_cpus; | |
| 168 static numa_max_node_func_t _numa_max_node; | |
| 169 static numa_available_func_t _numa_available; | |
| 170 static numa_tonode_memory_func_t _numa_tonode_memory; | |
| 171 static numa_interleave_memory_func_t _numa_interleave_memory; | |
| 172 static unsigned long* _numa_all_nodes; | |
| 173 | |
| 174 static void set_sched_getcpu(sched_getcpu_func_t func) { _sched_getcpu = func; } | |
| 175 static void set_numa_node_to_cpus(numa_node_to_cpus_func_t func) { _numa_node_to_cpus = func; } | |
| 176 static void set_numa_max_node(numa_max_node_func_t func) { _numa_max_node = func; } | |
| 177 static void set_numa_available(numa_available_func_t func) { _numa_available = func; } | |
| 178 static void set_numa_tonode_memory(numa_tonode_memory_func_t func) { _numa_tonode_memory = func; } | |
| 179 static void set_numa_interleave_memory(numa_interleave_memory_func_t func) { _numa_interleave_memory = func; } | |
| 180 static void set_numa_all_nodes(unsigned long* ptr) { _numa_all_nodes = ptr; } | |
| 181 public: | |
| 182 static int sched_getcpu() { return _sched_getcpu != NULL ? _sched_getcpu() : -1; } | |
| 183 static int numa_node_to_cpus(int node, unsigned long *buffer, int bufferlen) { | |
| 184 return _numa_node_to_cpus != NULL ? _numa_node_to_cpus(node, buffer, bufferlen) : -1; | |
| 185 } | |
| 186 static int numa_max_node() { return _numa_max_node != NULL ? _numa_max_node() : -1; } | |
| 187 static int numa_available() { return _numa_available != NULL ? _numa_available() : -1; } | |
| 188 static int numa_tonode_memory(void *start, size_t size, int node) { | |
| 189 return _numa_tonode_memory != NULL ? _numa_tonode_memory(start, size, node) : -1; | |
| 190 } | |
| 191 static void numa_interleave_memory(void *start, size_t size) { | |
| 192 if (_numa_interleave_memory != NULL && _numa_all_nodes != NULL) { | |
| 193 _numa_interleave_memory(start, size, _numa_all_nodes); | |
| 194 } | |
| 195 } | |
| 196 static int get_node_by_cpu(int cpu_id); | |
| 197 }; | |
| 198 | |
| 199 | |
| 6197 | 200 class PlatformEvent : public CHeapObj<mtInternal> { |
| 3960 | 201 private: |
| 202 double CachePad [4] ; // increase odds that _mutex is sole occupant of cache line | |
| 203 volatile int _Event ; | |
| 204 volatile int _nParked ; | |
| 205 pthread_mutex_t _mutex [1] ; | |
| 206 pthread_cond_t _cond [1] ; | |
| 207 double PostPad [2] ; | |
| 208 Thread * _Assoc ; | |
| 209 | |
| 210 public: // TODO-FIXME: make dtor private | |
| 211 ~PlatformEvent() { guarantee (0, "invariant") ; } | |
| 212 | |
| 213 public: | |
| 214 PlatformEvent() { | |
| 215 int status; | |
| 216 status = pthread_cond_init (_cond, NULL); | |
| 217 assert_status(status == 0, status, "cond_init"); | |
| 218 status = pthread_mutex_init (_mutex, NULL); | |
| 219 assert_status(status == 0, status, "mutex_init"); | |
| 220 _Event = 0 ; | |
| 221 _nParked = 0 ; | |
| 222 _Assoc = NULL ; | |
| 223 } | |
| 224 | |
| 225 // Use caution with reset() and fired() -- they may require MEMBARs | |
| 226 void reset() { _Event = 0 ; } | |
| 227 int fired() { return _Event; } | |
| 228 void park () ; | |
| 229 void unpark () ; | |
| 230 int TryPark () ; | |
| 231 int park (jlong millis) ; | |
| 232 void SetAssociation (Thread * a) { _Assoc = a ; } | |
| 10405 | 233 }; |
| 3960 | 234 |
| 6197 | 235 class PlatformParker : public CHeapObj<mtInternal> { |
| 3960 | 236 protected: |
| 237 pthread_mutex_t _mutex [1] ; | |
| 238 pthread_cond_t _cond [1] ; | |
| 239 | |
| 240 public: // TODO-FIXME: make dtor private | |
| 241 ~PlatformParker() { guarantee (0, "invariant") ; } | |
| 242 | |
| 243 public: | |
| 244 PlatformParker() { | |
| 245 int status; | |
| 246 status = pthread_cond_init (_cond, NULL); | |
| 247 assert_status(status == 0, status, "cond_init"); | |
| 248 status = pthread_mutex_init (_mutex, NULL); | |
| 249 assert_status(status == 0, status, "mutex_init"); | |
| 250 } | |
| 10405 | 251 }; |
| 3960 | 252 |
| 253 #endif // OS_BSD_VM_OS_BSD_HPP |