aoqi@0: /*
aoqi@0:  * Copyright (c) 1999, 2013, Oracle and/or its affiliates. All rights reserved.
aoqi@0:  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
aoqi@0:  *
aoqi@0:  * This code is free software; you can redistribute it and/or modify it
aoqi@0:  * under the terms of the GNU General Public License version 2 only, as
aoqi@0:  * published by the Free Software Foundation.
aoqi@0:  *
aoqi@0:  * This code is distributed in the hope that it will be useful, but WITHOUT
aoqi@0:  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
aoqi@0:  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
aoqi@0:  * version 2 for more details (a copy is included in the LICENSE file that
aoqi@0:  * accompanied this code).
aoqi@0:  *
aoqi@0:  * You should have received a copy of the GNU General Public License version
aoqi@0:  * 2 along with this work; if not, write to the Free Software Foundation,
aoqi@0:  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
aoqi@0:  *
aoqi@0:  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
aoqi@0:  * or visit www.oracle.com if you need additional information or have any
aoqi@0:  * questions.
aoqi@0:  *
aoqi@0:  */
aoqi@0: 
aoqi@0: #ifndef OS_BSD_VM_OS_BSD_HPP
aoqi@0: #define OS_BSD_VM_OS_BSD_HPP
aoqi@0: 
aoqi@0: // Bsd_OS defines the interface to Bsd operating systems
aoqi@0: 
aoqi@0: // Information about the protection of the page at address '0' on this os.
aoqi@0: static bool zero_page_read_protected() { return true; }
aoqi@0: 
aoqi@0: /* pthread_getattr_np comes with BsdThreads-0.9-7 on RedHat 7.1 */
aoqi@0: typedef int (*pthread_getattr_func_type) (pthread_t, pthread_attr_t *);
aoqi@0: 
aoqi@0: #ifdef __APPLE__
aoqi@0: // Mac OS X doesn't support clock_gettime. Stub out the type, it is
aoqi@0: // unused
aoqi@0: typedef int clockid_t;
aoqi@0: #endif
aoqi@0: 
aoqi@0: class Bsd {
aoqi@0:   friend class os;
aoqi@0: 
aoqi@0:   // For signal-chaining
aoqi@0: #define MAXSIGNUM 32
aoqi@0:   static struct sigaction sigact[MAXSIGNUM]; // saved preinstalled sigactions
aoqi@0:   static unsigned int sigs;             // mask of signals that have
aoqi@0:                                         // preinstalled signal handlers
aoqi@0:   static bool libjsig_is_loaded;        // libjsig that interposes sigaction(),
aoqi@0:                                         // __sigaction(), signal() is loaded
aoqi@0:   static struct sigaction *(*get_signal_action)(int);
aoqi@0:   static struct sigaction *get_preinstalled_handler(int);
aoqi@0:   static void save_preinstalled_handler(int, struct sigaction&);
aoqi@0: 
aoqi@0:   static void check_signal_handler(int sig);
aoqi@0: 
aoqi@0:   // For signal flags diagnostics
aoqi@0:   static int sigflags[MAXSIGNUM];
aoqi@0: 
aoqi@0: #ifdef __APPLE__
aoqi@0:   // mach_absolute_time
aoqi@0:   static mach_timebase_info_data_t _timebase_info;
aoqi@0:   static volatile uint64_t         _max_abstime;
aoqi@0: #else
aoqi@0:   static int (*_clock_gettime)(clockid_t, struct timespec *);
aoqi@0: #endif
aoqi@0: 
aoqi@0:   static GrowableArray<int>* _cpu_to_node;
aoqi@0: 
aoqi@0:  protected:
aoqi@0: 
aoqi@0:   static julong _physical_memory;
aoqi@0:   static pthread_t _main_thread;
aoqi@0:   static int _page_size;
aoqi@0: 
aoqi@0:   static julong available_memory();
aoqi@0:   static julong physical_memory() { return _physical_memory; }
aoqi@0:   static void initialize_system_info();
aoqi@0: 
aoqi@0:   static bool supports_variable_stack_size();
aoqi@0: 
aoqi@0:   static void rebuild_cpu_to_node_map();
aoqi@0:   static GrowableArray<int>* cpu_to_node()    { return _cpu_to_node; }
aoqi@0: 
aoqi@0:   static bool hugetlbfs_sanity_check(bool warn, size_t page_size);
aoqi@0: 
aoqi@0:  public:
aoqi@0: 
aoqi@0:   static void init_thread_fpu_state();
aoqi@0:   static pthread_t main_thread(void)                                { return _main_thread; }
aoqi@0: 
aoqi@0:   static void hotspot_sigmask(Thread* thread);
aoqi@0: 
aoqi@0:   static bool is_initial_thread(void);
aoqi@0:   static pid_t gettid();
aoqi@0: 
aoqi@0:   static int page_size(void)                                        { return _page_size; }
aoqi@0:   static void set_page_size(int val)                                { _page_size = val; }
aoqi@0: 
aoqi@0:   static address   ucontext_get_pc(ucontext_t* uc);
aoqi@0:   static intptr_t* ucontext_get_sp(ucontext_t* uc);
aoqi@0:   static intptr_t* ucontext_get_fp(ucontext_t* uc);
aoqi@0: 
aoqi@0:   // For Analyzer Forte AsyncGetCallTrace profiling support:
aoqi@0:   //
aoqi@0:   // This interface should be declared in os_bsd_i486.hpp, but
aoqi@0:   // that file provides extensions to the os class and not the
aoqi@0:   // Bsd class.
aoqi@0:   static ExtendedPC fetch_frame_from_ucontext(Thread* thread, ucontext_t* uc,
aoqi@0:     intptr_t** ret_sp, intptr_t** ret_fp);
aoqi@0: 
aoqi@0:   // This boolean allows users to forward their own non-matching signals
aoqi@0:   // to JVM_handle_bsd_signal, harmlessly.
aoqi@0:   static bool signal_handlers_are_installed;
aoqi@0: 
aoqi@0:   static int get_our_sigflags(int);
aoqi@0:   static void set_our_sigflags(int, int);
aoqi@0:   static void signal_sets_init();
aoqi@0:   static void install_signal_handlers();
aoqi@0:   static void set_signal_handler(int, bool);
aoqi@0:   static bool is_sig_ignored(int sig);
aoqi@0: 
aoqi@0:   static sigset_t* unblocked_signals();
aoqi@0:   static sigset_t* vm_signals();
aoqi@0:   static sigset_t* allowdebug_blocked_signals();
aoqi@0: 
aoqi@0:   // For signal-chaining
aoqi@0:   static struct sigaction *get_chained_signal_action(int sig);
aoqi@0:   static bool chained_handler(int sig, siginfo_t* siginfo, void* context);
aoqi@0: 
aoqi@0:   // Minimum stack size a thread can be created with (allowing
aoqi@0:   // the VM to completely create the thread and enter user code)
aoqi@0:   static size_t min_stack_allowed;
aoqi@0: 
aoqi@0:   // Return default stack size or guard size for the specified thread type
aoqi@0:   static size_t default_stack_size(os::ThreadType thr_type);
aoqi@0:   static size_t default_guard_size(os::ThreadType thr_type);
aoqi@0: 
aoqi@0:   // Real-time clock functions
aoqi@0:   static void clock_init(void);
aoqi@0: 
aoqi@0:   static inline bool supports_monotonic_clock() {
aoqi@0: #ifdef __APPLE__
aoqi@0:     return true;
aoqi@0: #else
aoqi@0:     return _clock_gettime != NULL;
aoqi@0: #endif
aoqi@0:   }
aoqi@0: 
aoqi@0:   // Stack repair handling
aoqi@0: 
aoqi@0:   // none present
aoqi@0: 
aoqi@0:   // BsdThreads work-around for 6292965
aoqi@0:   static int safe_cond_timedwait(pthread_cond_t *_cond, pthread_mutex_t *_mutex, const struct timespec *_abstime);
aoqi@0: 
aoqi@0: private:
aoqi@0:   typedef int (*sched_getcpu_func_t)(void);
aoqi@0:   typedef int (*numa_node_to_cpus_func_t)(int node, unsigned long *buffer, int bufferlen);
aoqi@0:   typedef int (*numa_max_node_func_t)(void);
aoqi@0:   typedef int (*numa_available_func_t)(void);
aoqi@0:   typedef int (*numa_tonode_memory_func_t)(void *start, size_t size, int node);
aoqi@0:   typedef void (*numa_interleave_memory_func_t)(void *start, size_t size, unsigned long *nodemask);
aoqi@0: 
aoqi@0:   static sched_getcpu_func_t _sched_getcpu;
aoqi@0:   static numa_node_to_cpus_func_t _numa_node_to_cpus;
aoqi@0:   static numa_max_node_func_t _numa_max_node;
aoqi@0:   static numa_available_func_t _numa_available;
aoqi@0:   static numa_tonode_memory_func_t _numa_tonode_memory;
aoqi@0:   static numa_interleave_memory_func_t _numa_interleave_memory;
aoqi@0:   static unsigned long* _numa_all_nodes;
aoqi@0: 
aoqi@0:   static void set_sched_getcpu(sched_getcpu_func_t func) { _sched_getcpu = func; }
aoqi@0:   static void set_numa_node_to_cpus(numa_node_to_cpus_func_t func) { _numa_node_to_cpus = func; }
aoqi@0:   static void set_numa_max_node(numa_max_node_func_t func) { _numa_max_node = func; }
aoqi@0:   static void set_numa_available(numa_available_func_t func) { _numa_available = func; }
aoqi@0:   static void set_numa_tonode_memory(numa_tonode_memory_func_t func) { _numa_tonode_memory = func; }
aoqi@0:   static void set_numa_interleave_memory(numa_interleave_memory_func_t func) { _numa_interleave_memory = func; }
aoqi@0:   static void set_numa_all_nodes(unsigned long* ptr) { _numa_all_nodes = ptr; }
aoqi@0: public:
aoqi@0:   static int sched_getcpu()  { return _sched_getcpu != NULL ? _sched_getcpu() : -1; }
aoqi@0:   static int numa_node_to_cpus(int node, unsigned long *buffer, int bufferlen) {
aoqi@0:     return _numa_node_to_cpus != NULL ? _numa_node_to_cpus(node, buffer, bufferlen) : -1;
aoqi@0:   }
aoqi@0:   static int numa_max_node() { return _numa_max_node != NULL ? _numa_max_node() : -1; }
aoqi@0:   static int numa_available() { return _numa_available != NULL ? _numa_available() : -1; }
aoqi@0:   static int numa_tonode_memory(void *start, size_t size, int node) {
aoqi@0:     return _numa_tonode_memory != NULL ? _numa_tonode_memory(start, size, node) : -1;
aoqi@0:   }
aoqi@0:   static void numa_interleave_memory(void *start, size_t size) {
aoqi@0:     if (_numa_interleave_memory != NULL && _numa_all_nodes != NULL) {
aoqi@0:       _numa_interleave_memory(start, size, _numa_all_nodes);
aoqi@0:     }
aoqi@0:   }
aoqi@0:   static int get_node_by_cpu(int cpu_id);
aoqi@0: };
aoqi@0: 
aoqi@0: 
aoqi@0: class PlatformEvent : public CHeapObj<mtInternal> {
aoqi@0:   private:
aoqi@0:     double CachePad [4] ;   // increase odds that _mutex is sole occupant of cache line
aoqi@0:     volatile int _Event ;
aoqi@0:     volatile int _nParked ;
aoqi@0:     pthread_mutex_t _mutex  [1] ;
aoqi@0:     pthread_cond_t  _cond   [1] ;
aoqi@0:     double PostPad  [2] ;
aoqi@0:     Thread * _Assoc ;
aoqi@0: 
aoqi@0:   public:       // TODO-FIXME: make dtor private
aoqi@0:     ~PlatformEvent() { guarantee (0, "invariant") ; }
aoqi@0: 
aoqi@0:   public:
aoqi@0:     PlatformEvent() {
aoqi@0:       int status;
aoqi@0:       status = pthread_cond_init (_cond, NULL);
aoqi@0:       assert_status(status == 0, status, "cond_init");
aoqi@0:       status = pthread_mutex_init (_mutex, NULL);
aoqi@0:       assert_status(status == 0, status, "mutex_init");
aoqi@0:       _Event   = 0 ;
aoqi@0:       _nParked = 0 ;
aoqi@0:       _Assoc   = NULL ;
aoqi@0:     }
aoqi@0: 
aoqi@0:     // Use caution with reset() and fired() -- they may require MEMBARs
aoqi@0:     void reset() { _Event = 0 ; }
aoqi@0:     int  fired() { return _Event; }
aoqi@0:     void park () ;
aoqi@0:     void unpark () ;
aoqi@0:     int  TryPark () ;
aoqi@0:     int  park (jlong millis) ;
aoqi@0:     void SetAssociation (Thread * a) { _Assoc = a ; }
aoqi@0: };
aoqi@0: 
aoqi@0: class PlatformParker : public CHeapObj<mtInternal> {
aoqi@0:   protected:
aoqi@0:     pthread_mutex_t _mutex [1] ;
aoqi@0:     pthread_cond_t  _cond  [1] ;
aoqi@0: 
aoqi@0:   public:       // TODO-FIXME: make dtor private
aoqi@0:     ~PlatformParker() { guarantee (0, "invariant") ; }
aoqi@0: 
aoqi@0:   public:
aoqi@0:     PlatformParker() {
aoqi@0:       int status;
aoqi@0:       status = pthread_cond_init (_cond, NULL);
aoqi@0:       assert_status(status == 0, status, "cond_init");
aoqi@0:       status = pthread_mutex_init (_mutex, NULL);
aoqi@0:       assert_status(status == 0, status, "mutex_init");
aoqi@0:     }
aoqi@0: };
aoqi@0: 
aoqi@0: #endif // OS_BSD_VM_OS_BSD_HPP