1.1 --- /dev/null Thu Jan 01 00:00:00 1970 +0000
1.2 +++ b/src/os/bsd/vm/os_bsd.hpp Wed Apr 27 01:25:04 2016 +0800
1.3 @@ -0,0 +1,253 @@
1.4 +/*
1.5 + * Copyright (c) 1999, 2013, Oracle and/or its affiliates. All rights reserved.
1.6 + * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
1.7 + *
1.8 + * This code is free software; you can redistribute it and/or modify it
1.9 + * under the terms of the GNU General Public License version 2 only, as
1.10 + * published by the Free Software Foundation.
1.11 + *
1.12 + * This code is distributed in the hope that it will be useful, but WITHOUT
1.13 + * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
1.14 + * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
1.15 + * version 2 for more details (a copy is included in the LICENSE file that
1.16 + * accompanied this code).
1.17 + *
1.18 + * You should have received a copy of the GNU General Public License version
1.19 + * 2 along with this work; if not, write to the Free Software Foundation,
1.20 + * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
1.21 + *
1.22 + * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
1.23 + * or visit www.oracle.com if you need additional information or have any
1.24 + * questions.
1.25 + *
1.26 + */
1.27 +
1.28 +#ifndef OS_BSD_VM_OS_BSD_HPP
1.29 +#define OS_BSD_VM_OS_BSD_HPP
1.30 +
1.31 +// Bsd_OS defines the interface to Bsd operating systems
1.32 +
1.33 +// Information about the protection of the page at address '0' on this os.
1.34 +static bool zero_page_read_protected() { return true; }
1.35 +
1.36 +/* pthread_getattr_np comes with BsdThreads-0.9-7 on RedHat 7.1 */
1.37 +typedef int (*pthread_getattr_func_type) (pthread_t, pthread_attr_t *);
1.38 +
1.39 +#ifdef __APPLE__
1.40 +// Mac OS X doesn't support clock_gettime. Stub out the type, it is
1.41 +// unused
1.42 +typedef int clockid_t;
1.43 +#endif
1.44 +
1.45 +class Bsd {
1.46 + friend class os;
1.47 +
1.48 + // For signal-chaining
1.49 +#define MAXSIGNUM 32
1.50 + static struct sigaction sigact[MAXSIGNUM]; // saved preinstalled sigactions
1.51 + static unsigned int sigs; // mask of signals that have
1.52 + // preinstalled signal handlers
1.53 + static bool libjsig_is_loaded; // libjsig that interposes sigaction(),
1.54 + // __sigaction(), signal() is loaded
1.55 + static struct sigaction *(*get_signal_action)(int);
1.56 + static struct sigaction *get_preinstalled_handler(int);
1.57 + static void save_preinstalled_handler(int, struct sigaction&);
1.58 +
1.59 + static void check_signal_handler(int sig);
1.60 +
1.61 + // For signal flags diagnostics
1.62 + static int sigflags[MAXSIGNUM];
1.63 +
1.64 +#ifdef __APPLE__
1.65 + // mach_absolute_time
1.66 + static mach_timebase_info_data_t _timebase_info;
1.67 + static volatile uint64_t _max_abstime;
1.68 +#else
1.69 + static int (*_clock_gettime)(clockid_t, struct timespec *);
1.70 +#endif
1.71 +
1.72 + static GrowableArray<int>* _cpu_to_node;
1.73 +
1.74 + protected:
1.75 +
1.76 + static julong _physical_memory;
1.77 + static pthread_t _main_thread;
1.78 + static int _page_size;
1.79 +
1.80 + static julong available_memory();
1.81 + static julong physical_memory() { return _physical_memory; }
1.82 + static void initialize_system_info();
1.83 +
1.84 + static bool supports_variable_stack_size();
1.85 +
1.86 + static void rebuild_cpu_to_node_map();
1.87 + static GrowableArray<int>* cpu_to_node() { return _cpu_to_node; }
1.88 +
1.89 + static bool hugetlbfs_sanity_check(bool warn, size_t page_size);
1.90 +
1.91 + public:
1.92 +
1.93 + static void init_thread_fpu_state();
1.94 + static pthread_t main_thread(void) { return _main_thread; }
1.95 +
1.96 + static void hotspot_sigmask(Thread* thread);
1.97 +
1.98 + static bool is_initial_thread(void);
1.99 + static pid_t gettid();
1.100 +
1.101 + static int page_size(void) { return _page_size; }
1.102 + static void set_page_size(int val) { _page_size = val; }
1.103 +
1.104 + static address ucontext_get_pc(ucontext_t* uc);
1.105 + static intptr_t* ucontext_get_sp(ucontext_t* uc);
1.106 + static intptr_t* ucontext_get_fp(ucontext_t* uc);
1.107 +
1.108 + // For Analyzer Forte AsyncGetCallTrace profiling support:
1.109 + //
1.110 + // This interface should be declared in os_bsd_i486.hpp, but
1.111 + // that file provides extensions to the os class and not the
1.112 + // Bsd class.
1.113 + static ExtendedPC fetch_frame_from_ucontext(Thread* thread, ucontext_t* uc,
1.114 + intptr_t** ret_sp, intptr_t** ret_fp);
1.115 +
1.116 + // This boolean allows users to forward their own non-matching signals
1.117 + // to JVM_handle_bsd_signal, harmlessly.
1.118 + static bool signal_handlers_are_installed;
1.119 +
1.120 + static int get_our_sigflags(int);
1.121 + static void set_our_sigflags(int, int);
1.122 + static void signal_sets_init();
1.123 + static void install_signal_handlers();
1.124 + static void set_signal_handler(int, bool);
1.125 + static bool is_sig_ignored(int sig);
1.126 +
1.127 + static sigset_t* unblocked_signals();
1.128 + static sigset_t* vm_signals();
1.129 + static sigset_t* allowdebug_blocked_signals();
1.130 +
1.131 + // For signal-chaining
1.132 + static struct sigaction *get_chained_signal_action(int sig);
1.133 + static bool chained_handler(int sig, siginfo_t* siginfo, void* context);
1.134 +
1.135 + // Minimum stack size a thread can be created with (allowing
1.136 + // the VM to completely create the thread and enter user code)
1.137 + static size_t min_stack_allowed;
1.138 +
1.139 + // Return default stack size or guard size for the specified thread type
1.140 + static size_t default_stack_size(os::ThreadType thr_type);
1.141 + static size_t default_guard_size(os::ThreadType thr_type);
1.142 +
1.143 + // Real-time clock functions
1.144 + static void clock_init(void);
1.145 +
1.146 + static inline bool supports_monotonic_clock() {
1.147 +#ifdef __APPLE__
1.148 + return true;
1.149 +#else
1.150 + return _clock_gettime != NULL;
1.151 +#endif
1.152 + }
1.153 +
1.154 + // Stack repair handling
1.155 +
1.156 + // none present
1.157 +
1.158 + // BsdThreads work-around for 6292965
1.159 + static int safe_cond_timedwait(pthread_cond_t *_cond, pthread_mutex_t *_mutex, const struct timespec *_abstime);
1.160 +
1.161 +private:
1.162 + typedef int (*sched_getcpu_func_t)(void);
1.163 + typedef int (*numa_node_to_cpus_func_t)(int node, unsigned long *buffer, int bufferlen);
1.164 + typedef int (*numa_max_node_func_t)(void);
1.165 + typedef int (*numa_available_func_t)(void);
1.166 + typedef int (*numa_tonode_memory_func_t)(void *start, size_t size, int node);
1.167 + typedef void (*numa_interleave_memory_func_t)(void *start, size_t size, unsigned long *nodemask);
1.168 +
1.169 + static sched_getcpu_func_t _sched_getcpu;
1.170 + static numa_node_to_cpus_func_t _numa_node_to_cpus;
1.171 + static numa_max_node_func_t _numa_max_node;
1.172 + static numa_available_func_t _numa_available;
1.173 + static numa_tonode_memory_func_t _numa_tonode_memory;
1.174 + static numa_interleave_memory_func_t _numa_interleave_memory;
1.175 + static unsigned long* _numa_all_nodes;
1.176 +
1.177 + static void set_sched_getcpu(sched_getcpu_func_t func) { _sched_getcpu = func; }
1.178 + static void set_numa_node_to_cpus(numa_node_to_cpus_func_t func) { _numa_node_to_cpus = func; }
1.179 + static void set_numa_max_node(numa_max_node_func_t func) { _numa_max_node = func; }
1.180 + static void set_numa_available(numa_available_func_t func) { _numa_available = func; }
1.181 + static void set_numa_tonode_memory(numa_tonode_memory_func_t func) { _numa_tonode_memory = func; }
1.182 + static void set_numa_interleave_memory(numa_interleave_memory_func_t func) { _numa_interleave_memory = func; }
1.183 + static void set_numa_all_nodes(unsigned long* ptr) { _numa_all_nodes = ptr; }
1.184 +public:
1.185 + static int sched_getcpu() { return _sched_getcpu != NULL ? _sched_getcpu() : -1; }
1.186 + static int numa_node_to_cpus(int node, unsigned long *buffer, int bufferlen) {
1.187 + return _numa_node_to_cpus != NULL ? _numa_node_to_cpus(node, buffer, bufferlen) : -1;
1.188 + }
1.189 + static int numa_max_node() { return _numa_max_node != NULL ? _numa_max_node() : -1; }
1.190 + static int numa_available() { return _numa_available != NULL ? _numa_available() : -1; }
1.191 + static int numa_tonode_memory(void *start, size_t size, int node) {
1.192 + return _numa_tonode_memory != NULL ? _numa_tonode_memory(start, size, node) : -1;
1.193 + }
1.194 + static void numa_interleave_memory(void *start, size_t size) {
1.195 + if (_numa_interleave_memory != NULL && _numa_all_nodes != NULL) {
1.196 + _numa_interleave_memory(start, size, _numa_all_nodes);
1.197 + }
1.198 + }
1.199 + static int get_node_by_cpu(int cpu_id);
1.200 +};
1.201 +
1.202 +
1.203 +class PlatformEvent : public CHeapObj<mtInternal> {
1.204 + private:
1.205 + double CachePad [4] ; // increase odds that _mutex is sole occupant of cache line
1.206 + volatile int _Event ;
1.207 + volatile int _nParked ;
1.208 + pthread_mutex_t _mutex [1] ;
1.209 + pthread_cond_t _cond [1] ;
1.210 + double PostPad [2] ;
1.211 + Thread * _Assoc ;
1.212 +
1.213 + public: // TODO-FIXME: make dtor private
1.214 + ~PlatformEvent() { guarantee (0, "invariant") ; }
1.215 +
1.216 + public:
1.217 + PlatformEvent() {
1.218 + int status;
1.219 + status = pthread_cond_init (_cond, NULL);
1.220 + assert_status(status == 0, status, "cond_init");
1.221 + status = pthread_mutex_init (_mutex, NULL);
1.222 + assert_status(status == 0, status, "mutex_init");
1.223 + _Event = 0 ;
1.224 + _nParked = 0 ;
1.225 + _Assoc = NULL ;
1.226 + }
1.227 +
1.228 + // Use caution with reset() and fired() -- they may require MEMBARs
1.229 + void reset() { _Event = 0 ; }
1.230 + int fired() { return _Event; }
1.231 + void park () ;
1.232 + void unpark () ;
1.233 + int TryPark () ;
1.234 + int park (jlong millis) ;
1.235 + void SetAssociation (Thread * a) { _Assoc = a ; }
1.236 +};
1.237 +
1.238 +class PlatformParker : public CHeapObj<mtInternal> {
1.239 + protected:
1.240 + pthread_mutex_t _mutex [1] ;
1.241 + pthread_cond_t _cond [1] ;
1.242 +
1.243 + public: // TODO-FIXME: make dtor private
1.244 + ~PlatformParker() { guarantee (0, "invariant") ; }
1.245 +
1.246 + public:
1.247 + PlatformParker() {
1.248 + int status;
1.249 + status = pthread_cond_init (_cond, NULL);
1.250 + assert_status(status == 0, status, "cond_init");
1.251 + status = pthread_mutex_init (_mutex, NULL);
1.252 + assert_status(status == 0, status, "mutex_init");
1.253 + }
1.254 +};
1.255 +
1.256 +#endif // OS_BSD_VM_OS_BSD_HPP
