os_bsd.hpp revision 7996:3eb61269f421
131567Ssef/* 2204977Simp * Copyright (c) 1999, 2014, Oracle and/or its affiliates. All rights reserved. 331899Ssef * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. 431899Ssef * 531899Ssef * This code is free software; you can redistribute it and/or modify it 631899Ssef * under the terms of the GNU General Public License version 2 only, as 731899Ssef * published by the Free Software Foundation. 831899Ssef * 931899Ssef * This code is distributed in the hope that it will be useful, but WITHOUT 1031899Ssef * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 1131899Ssef * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License 1231899Ssef * version 2 for more details (a copy is included in the LICENSE file that 1331899Ssef * accompanied this code). 1431899Ssef * 1531899Ssef * You should have received a copy of the GNU General Public License version 1631899Ssef * 2 along with this work; if not, write to the Free Software Foundation, 1731899Ssef * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. 1831899Ssef * 1931899Ssef * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA 2031899Ssef * or visit www.oracle.com if you need additional information or have any 2131899Ssef * questions. 2231899Ssef * 2331899Ssef */ 2431899Ssef 2531899Ssef#ifndef OS_BSD_VM_OS_BSD_HPP 2631899Ssef#define OS_BSD_VM_OS_BSD_HPP 2731899Ssef 2831899Ssef// Bsd_OS defines the interface to Bsd operating systems 2931899Ssef 3031899Ssef// Information about the protection of the page at address '0' on this os. 3131899Ssefstatic bool zero_page_read_protected() { return true; } 3232275Scharnier 3332275Scharnier// pthread_getattr_np comes with BsdThreads-0.9-7 on RedHat 7.1 3450477Spetertypedef int (*pthread_getattr_func_type)(pthread_t, pthread_attr_t *); 3532275Scharnier 3632275Scharnier#ifdef __APPLE__ 3731899Ssef// Mac OS X doesn't support clock_gettime. Stub out the type, it is 3831567Ssef// unused 3931567Sseftypedef int clockid_t; 4031567Ssef#endif 4131567Ssef 42127328Salfredclass Bsd { 4385292Sdes friend class os; 44168569Sdelphij 4585292Sdes // For signal-chaining 46104581Smike#define MAXSIGNUM 32 4785292Sdes static struct sigaction sigact[MAXSIGNUM]; // saved preinstalled sigactions 4885292Sdes static unsigned int sigs; // mask of signals that have 4985292Sdes // preinstalled signal handlers 50158630Spav static bool libjsig_is_loaded; // libjsig that interposes sigaction(), 51158630Spav // __sigaction(), signal() is loaded 52158630Spav static struct sigaction *(*get_signal_action)(int); 53158630Spav static struct sigaction *get_preinstalled_handler(int); 54158630Spav static void save_preinstalled_handler(int, struct sigaction&); 55158630Spav 56158630Spav static void check_signal_handler(int sig); 5785292Sdes 5886138Sgreen // For signal flags diagnostics 5932275Scharnier static int sigflags[MAXSIGNUM]; 60127328Salfred 61127332Sdwmalone#ifdef __APPLE__ 6285292Sdes // mach_absolute_time 63127332Sdwmalone static mach_timebase_info_data_t _timebase_info; 6431567Ssef static volatile uint64_t _max_abstime; 6531567Ssef#else 6631567Ssef static int (*_clock_gettime)(clockid_t, struct timespec *); 67101423Smdodd#endif 6831567Ssef 69158630Spav static GrowableArray<int>* _cpu_to_node; 7085292Sdes 71101282Smdodd protected: 7287703Smarkm 7331567Ssef static julong _physical_memory; 7431567Ssef static pthread_t _main_thread; 75171646Smarcel static int _page_size; 76171646Smarcel 77171646Smarcel static julong available_memory(); 78171646Smarcel static julong physical_memory() { return _physical_memory; } 79171646Smarcel static void initialize_system_info(); 80171646Smarcel 81171646Smarcel static bool supports_variable_stack_size(); 82171646Smarcel 83171646Smarcel static void rebuild_cpu_to_node_map(); 84171646Smarcel static GrowableArray<int>* cpu_to_node() { return _cpu_to_node; } 85171646Smarcel 86171646Smarcel static bool hugetlbfs_sanity_check(bool warn, size_t page_size); 87171646Smarcel 88171646Smarcel public: 8931567Ssef 90158630Spav static void init_thread_fpu_state(); 9131567Ssef static pthread_t main_thread(void) { return _main_thread; } 92228396Sed 93192025Sdds static void hotspot_sigmask(Thread* thread); 94192025Sdds 95200751Sjh static bool is_initial_thread(void); 96200751Sjh static pid_t gettid(); 97200751Sjh 98200751Sjh static int page_size(void) { return _page_size; } 99200751Sjh static void set_page_size(int val) { _page_size = val; } 100200751Sjh 101200751Sjh static address ucontext_get_pc(ucontext_t* uc); 102200751Sjh static void ucontext_set_pc(ucontext_t* uc, address pc); 103200751Sjh static intptr_t* ucontext_get_sp(ucontext_t* uc); 104200751Sjh static intptr_t* ucontext_get_fp(ucontext_t* uc); 105200751Sjh 106200751Sjh // For Analyzer Forte AsyncGetCallTrace profiling support: 107192025Sdds // 108192025Sdds // This interface should be declared in os_bsd_i486.hpp, but 109192025Sdds // that file provides extensions to the os class and not the 110192025Sdds // Bsd class. 111192025Sdds static ExtendedPC fetch_frame_from_ucontext(Thread* thread, ucontext_t* uc, 112192025Sdds intptr_t** ret_sp, intptr_t** ret_fp); 113192025Sdds 114192025Sdds // This boolean allows users to forward their own non-matching signals 115192025Sdds // to JVM_handle_bsd_signal, harmlessly. 116192025Sdds static bool signal_handlers_are_installed; 117192025Sdds 118192025Sdds static int get_our_sigflags(int); 119192025Sdds static void set_our_sigflags(int, int); 120192025Sdds static void signal_sets_init(); 121192025Sdds static void install_signal_handlers(); 122192025Sdds static void set_signal_handler(int, bool); 123192025Sdds static bool is_sig_ignored(int sig); 124192025Sdds 125192025Sdds static sigset_t* unblocked_signals(); 126192025Sdds static sigset_t* vm_signals(); 127192025Sdds static sigset_t* allowdebug_blocked_signals(); 128192025Sdds 129192025Sdds // For signal-chaining 130192025Sdds static struct sigaction *get_chained_signal_action(int sig); 131192025Sdds static bool chained_handler(int sig, siginfo_t* siginfo, void* context); 132192025Sdds 133192025Sdds // Minimum stack size a thread can be created with (allowing 134192025Sdds // the VM to completely create the thread and enter user code) 135192025Sdds static size_t min_stack_allowed; 136192025Sdds 137192025Sdds // Return default stack size or guard size for the specified thread type 138192025Sdds static size_t default_stack_size(os::ThreadType thr_type); 139192025Sdds static size_t default_guard_size(os::ThreadType thr_type); 140192025Sdds 141192025Sdds // Real-time clock functions 142192025Sdds static void clock_init(void); 143192025Sdds 144192025Sdds // Stack repair handling 145192025Sdds 146192025Sdds // none present 147192025Sdds 148192025Sdds // BsdThreads work-around for 6292965 149192025Sdds static int safe_cond_timedwait(pthread_cond_t *_cond, pthread_mutex_t *_mutex, const struct timespec *_abstime); 150192025Sdds 151192025Sdds private: 152192025Sdds typedef int (*sched_getcpu_func_t)(void); 153192025Sdds typedef int (*numa_node_to_cpus_func_t)(int node, unsigned long *buffer, int bufferlen); 154192025Sdds typedef int (*numa_max_node_func_t)(void); 155192025Sdds typedef int (*numa_available_func_t)(void); 156192025Sdds typedef int (*numa_tonode_memory_func_t)(void *start, size_t size, int node); 157192025Sdds typedef void (*numa_interleave_memory_func_t)(void *start, size_t size, unsigned long *nodemask); 158192025Sdds 159192025Sdds static sched_getcpu_func_t _sched_getcpu; 160192025Sdds static numa_node_to_cpus_func_t _numa_node_to_cpus; 161192025Sdds static numa_max_node_func_t _numa_max_node; 162192025Sdds static numa_available_func_t _numa_available; 163192025Sdds static numa_tonode_memory_func_t _numa_tonode_memory; 164192025Sdds static numa_interleave_memory_func_t _numa_interleave_memory; 165192025Sdds static unsigned long* _numa_all_nodes; 166192025Sdds 167192025Sdds static void set_sched_getcpu(sched_getcpu_func_t func) { _sched_getcpu = func; } 168192025Sdds static void set_numa_node_to_cpus(numa_node_to_cpus_func_t func) { _numa_node_to_cpus = func; } 169192025Sdds static void set_numa_max_node(numa_max_node_func_t func) { _numa_max_node = func; } 170192025Sdds static void set_numa_available(numa_available_func_t func) { _numa_available = func; } 171192025Sdds static void set_numa_tonode_memory(numa_tonode_memory_func_t func) { _numa_tonode_memory = func; } 172192025Sdds static void set_numa_interleave_memory(numa_interleave_memory_func_t func) { _numa_interleave_memory = func; } 173192025Sdds static void set_numa_all_nodes(unsigned long* ptr) { _numa_all_nodes = ptr; } 174192025Sdds public: 175192025Sdds static int sched_getcpu() { return _sched_getcpu != NULL ? _sched_getcpu() : -1; } 176192025Sdds static int numa_node_to_cpus(int node, unsigned long *buffer, int bufferlen) { 177192025Sdds return _numa_node_to_cpus != NULL ? _numa_node_to_cpus(node, buffer, bufferlen) : -1; 178192025Sdds } 179192025Sdds static int numa_max_node() { return _numa_max_node != NULL ? _numa_max_node() : -1; } 180192025Sdds static int numa_available() { return _numa_available != NULL ? _numa_available() : -1; } 181192025Sdds static int numa_tonode_memory(void *start, size_t size, int node) { 182192025Sdds return _numa_tonode_memory != NULL ? _numa_tonode_memory(start, size, node) : -1; 183192025Sdds } 184192025Sdds static void numa_interleave_memory(void *start, size_t size) { 185192025Sdds if (_numa_interleave_memory != NULL && _numa_all_nodes != NULL) { 186192025Sdds _numa_interleave_memory(start, size, _numa_all_nodes); 187192025Sdds } 188192025Sdds } 189192025Sdds static int get_node_by_cpu(int cpu_id); 190192025Sdds}; 191192025Sdds 192192025Sdds 193192025Sddsclass PlatformEvent : public CHeapObj<mtInternal> { 194192025Sdds private: 195192025Sdds double CachePad[4]; // increase odds that _mutex is sole occupant of cache line 196192025Sdds volatile int _Event; 197192025Sdds volatile int _nParked; 198192025Sdds pthread_mutex_t _mutex[1]; 199192025Sdds pthread_cond_t _cond[1]; 200192025Sdds double PostPad[2]; 201192025Sdds Thread * _Assoc; 202192025Sdds 203192025Sdds public: // TODO-FIXME: make dtor private 204192025Sdds ~PlatformEvent() { guarantee(0, "invariant"); } 205192025Sdds 206192025Sdds public: 207192025Sdds PlatformEvent() { 208192025Sdds int status; 209192025Sdds status = pthread_cond_init(_cond, NULL); 210192025Sdds assert_status(status == 0, status, "cond_init"); 211192025Sdds status = pthread_mutex_init(_mutex, NULL); 212192025Sdds assert_status(status == 0, status, "mutex_init"); 213192025Sdds _Event = 0; 214192025Sdds _nParked = 0; 215192025Sdds _Assoc = NULL; 216192025Sdds } 217192025Sdds 218192025Sdds // Use caution with reset() and fired() -- they may require MEMBARs 219192025Sdds void reset() { _Event = 0; } 220192025Sdds int fired() { return _Event; } 221192025Sdds void park(); 222192025Sdds void unpark(); 223192025Sdds int park(jlong millis); 224192025Sdds void SetAssociation(Thread * a) { _Assoc = a; } 225192025Sdds}; 226192025Sdds 227192025Sddsclass PlatformParker : public CHeapObj<mtInternal> { 228192025Sdds protected: 229192025Sdds pthread_mutex_t _mutex[1]; 230192025Sdds pthread_cond_t _cond[1]; 231192025Sdds 232192025Sdds public: // TODO-FIXME: make dtor private 233192025Sdds ~PlatformParker() { guarantee(0, "invariant"); } 234192025Sdds 235192025Sdds public: 236192025Sdds PlatformParker() { 237192025Sdds int status; 238192025Sdds status = pthread_cond_init(_cond, NULL); 239192025Sdds assert_status(status == 0, status, "cond_init"); 240192025Sdds status = pthread_mutex_init(_mutex, NULL); 241192025Sdds assert_status(status == 0, status, "mutex_init"); 242192025Sdds } 243192025Sdds}; 244192025Sdds 245200780Sjh#endif // OS_BSD_VM_OS_BSD_HPP 246200780Sjh