1 /* 2 * Copyright (c) 1999, 2019, Oracle and/or its affiliates. All rights reserved. 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_OS_BSD_HPP 26 #define OS_BSD_OS_BSD_HPP 27 28 // Bsd_OS defines the interface to Bsd operating systems 29 30 // Information about the protection of the page at address '0' on this os. 31 static bool zero_page_read_protected() { return true; } 32 33 class Bsd { 34 friend class os; 35 36 // For signal-chaining 37 static bool libjsig_is_loaded; // libjsig that interposes sigaction(), 38 // __sigaction(), signal() is loaded 39 static struct sigaction *(*get_signal_action)(int); 40 static struct sigaction *get_preinstalled_handler(int); 41 static void save_preinstalled_handler(int, struct sigaction&); 42 43 static void check_signal_handler(int sig); 44 45 #ifdef __APPLE__ 46 // mach_absolute_time 47 static mach_timebase_info_data_t _timebase_info; 48 static volatile uint64_t _max_abstime; 49 #else 50 static int (*_clock_gettime)(clockid_t, struct timespec *); 51 #endif 52 53 static GrowableArray<int>* _cpu_to_node; 54 55 protected: 56 57 static julong _physical_memory; 58 static pthread_t _main_thread; 59 static int _page_size; 60 61 static julong available_memory(); 62 static julong physical_memory() { return _physical_memory; } 63 static void initialize_system_info(); 64 65 static void rebuild_cpu_to_node_map(); 66 static GrowableArray<int>* cpu_to_node() { return _cpu_to_node; } 67 68 static bool hugetlbfs_sanity_check(bool warn, size_t page_size); 69 70 public: 71 72 static void init_thread_fpu_state(); 73 static pthread_t main_thread(void) { return _main_thread; } 74 75 static void hotspot_sigmask(Thread* thread); 76 77 static pid_t gettid(); 78 79 static int page_size(void) { return _page_size; } 80 static void set_page_size(int val) { _page_size = val; } 81 82 static address ucontext_get_pc(const ucontext_t* uc); 83 static void ucontext_set_pc(ucontext_t* uc, address pc); 84 static intptr_t* ucontext_get_sp(const ucontext_t* uc); 85 static intptr_t* ucontext_get_fp(const ucontext_t* uc); 86 87 // For Analyzer Forte AsyncGetCallTrace profiling support: 88 // 89 // This interface should be declared in os_bsd_i486.hpp, but 90 // that file provides extensions to the os class and not the 91 // Bsd class. 92 static ExtendedPC fetch_frame_from_ucontext(Thread* thread, const ucontext_t* uc, 93 intptr_t** ret_sp, intptr_t** ret_fp); 94 95 static bool get_frame_at_stack_banging_point(JavaThread* thread, ucontext_t* uc, frame* fr); 96 97 // This boolean allows users to forward their own non-matching signals 98 // to JVM_handle_bsd_signal, harmlessly. 99 static bool signal_handlers_are_installed; 100 101 static int get_our_sigflags(int); 102 static void set_our_sigflags(int, int); 103 static void signal_sets_init(); 104 static void install_signal_handlers(); 105 static void set_signal_handler(int, bool); 106 107 static sigset_t* unblocked_signals(); 108 static sigset_t* vm_signals(); 109 110 // For signal-chaining 111 static struct sigaction *get_chained_signal_action(int sig); 112 static bool chained_handler(int sig, siginfo_t* siginfo, void* context); 113 114 // Real-time clock functions 115 static void clock_init(void); 116 117 // Stack repair handling 118 119 // none present 120 121 private: 122 typedef int (*sched_getcpu_func_t)(void); 123 typedef int (*numa_node_to_cpus_func_t)(int node, unsigned long *buffer, int bufferlen); 124 typedef int (*numa_max_node_func_t)(void); 125 typedef int (*numa_available_func_t)(void); 126 typedef int (*numa_tonode_memory_func_t)(void *start, size_t size, int node); 127 typedef void (*numa_interleave_memory_func_t)(void *start, size_t size, unsigned long *nodemask); 128 129 static sched_getcpu_func_t _sched_getcpu; 130 static numa_node_to_cpus_func_t _numa_node_to_cpus; 131 static numa_max_node_func_t _numa_max_node; 132 static numa_available_func_t _numa_available; 133 static numa_tonode_memory_func_t _numa_tonode_memory; 134 static numa_interleave_memory_func_t _numa_interleave_memory; 135 static unsigned long* _numa_all_nodes; 136 137 static void set_sched_getcpu(sched_getcpu_func_t func) { _sched_getcpu = func; } 138 static void set_numa_node_to_cpus(numa_node_to_cpus_func_t func) { _numa_node_to_cpus = func; } 139 static void set_numa_max_node(numa_max_node_func_t func) { _numa_max_node = func; } 140 static void set_numa_available(numa_available_func_t func) { _numa_available = func; } 141 static void set_numa_tonode_memory(numa_tonode_memory_func_t func) { _numa_tonode_memory = func; } 142 static void set_numa_interleave_memory(numa_interleave_memory_func_t func) { _numa_interleave_memory = func; } 143 static void set_numa_all_nodes(unsigned long* ptr) { _numa_all_nodes = ptr; } 144 public: 145 static int sched_getcpu() { return _sched_getcpu != NULL ? _sched_getcpu() : -1; } 146 static int numa_node_to_cpus(int node, unsigned long *buffer, int bufferlen) { 147 return _numa_node_to_cpus != NULL ? _numa_node_to_cpus(node, buffer, bufferlen) : -1; 148 } 149 static int numa_max_node() { return _numa_max_node != NULL ? _numa_max_node() : -1; } 150 static int numa_available() { return _numa_available != NULL ? _numa_available() : -1; } 151 static int numa_tonode_memory(void *start, size_t size, int node) { 152 return _numa_tonode_memory != NULL ? _numa_tonode_memory(start, size, node) : -1; 153 } 154 static void numa_interleave_memory(void *start, size_t size) { 155 if (_numa_interleave_memory != NULL && _numa_all_nodes != NULL) { 156 _numa_interleave_memory(start, size, _numa_all_nodes); 157 } 158 } 159 static int get_node_by_cpu(int cpu_id); 160 }; 161 162 #endif // OS_BSD_OS_BSD_HPP