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src/os/bsd/vm/os_bsd.hpp@ce8f6bb717c9 (annotated)

src/os/bsd/vm/os_bsd.hpp

Tue, 29 Apr 2014 15:17:27 +0200

author

goetz

date

Tue, 29 Apr 2014 15:17:27 +0200

changeset 6911

ce8f6bb717c9

parent 6667

917873d2983d

child 6876

710a3c8b516e

child 9289

427b2fb1944f

permissions

-rw-r--r--

8042195: Introduce umbrella header orderAccess.inline.hpp.
Reviewed-by: dholmes, kvn, stefank, twisti

never@3156	1	/*
simonis@4675	2	* Copyright (c) 1999, 2013, Oracle and/or its affiliates. All rights reserved.
never@3156	3	* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
never@3156	4	*
never@3156	5	* This code is free software; you can redistribute it and/or modify it
never@3156	6	* under the terms of the GNU General Public License version 2 only, as
never@3156	7	* published by the Free Software Foundation.
never@3156	8	*
never@3156	9	* This code is distributed in the hope that it will be useful, but WITHOUT
never@3156	10	* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
never@3156	11	* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
never@3156	12	* version 2 for more details (a copy is included in the LICENSE file that
never@3156	13	* accompanied this code).
never@3156	14	*
never@3156	15	* You should have received a copy of the GNU General Public License version
never@3156	16	* 2 along with this work; if not, write to the Free Software Foundation,
never@3156	17	* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
never@3156	18	*
never@3156	19	* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
never@3156	20	* or visit www.oracle.com if you need additional information or have any
never@3156	21	* questions.
never@3156	22	*
never@3156	23	*/
never@3156	24
never@3156	25	#ifndef OS_BSD_VM_OS_BSD_HPP
never@3156	26	#define OS_BSD_VM_OS_BSD_HPP
never@3156	27
never@3156	28	// Bsd_OS defines the interface to Bsd operating systems
never@3156	29
goetz@6486	30	// Information about the protection of the page at address '0' on this os.
goetz@6486	31	static bool zero_page_read_protected() { return true; }
goetz@6486	32
never@3156	33	/* pthread_getattr_np comes with BsdThreads-0.9-7 on RedHat 7.1 */
never@3156	34	typedef int (*pthread_getattr_func_type) (pthread_t, pthread_attr_t *);
never@3156	35
never@3156	36	#ifdef __APPLE__
never@3156	37	// Mac OS X doesn't support clock_gettime. Stub out the type, it is
never@3156	38	// unused
never@3156	39	typedef int clockid_t;
never@3156	40	#endif
never@3156	41
never@3156	42	class Bsd {
never@3156	43	friend class os;
never@3156	44
never@3156	45	// For signal-chaining
never@3156	46	#define MAXSIGNUM 32
never@3156	47	static struct sigaction sigact[MAXSIGNUM]; // saved preinstalled sigactions
never@3156	48	static unsigned int sigs; // mask of signals that have
never@3156	49	// preinstalled signal handlers
never@3156	50	static bool libjsig_is_loaded; // libjsig that interposes sigaction(),
never@3156	51	// __sigaction(), signal() is loaded
never@3156	52	static struct sigaction *(*get_signal_action)(int);
never@3156	53	static struct sigaction *get_preinstalled_handler(int);
never@3156	54	static void save_preinstalled_handler(int, struct sigaction&);
never@3156	55
never@3156	56	static void check_signal_handler(int sig);
never@3156	57
never@3156	58	// For signal flags diagnostics
never@3156	59	static int sigflags[MAXSIGNUM];
never@3156	60
sla@6667	61	#ifdef __APPLE__
sla@6667	62	// mach_absolute_time
sla@6667	63	static mach_timebase_info_data_t _timebase_info;
sla@6667	64	static volatile uint64_t _max_abstime;
sla@6667	65	#else
never@3156	66	static int (*_clock_gettime)(clockid_t, struct timespec *);
sla@6667	67	#endif
never@3156	68
never@3156	69	static GrowableArray<int>* _cpu_to_node;
never@3156	70
never@3156	71	protected:
never@3156	72
never@3156	73	static julong _physical_memory;
never@3156	74	static pthread_t _main_thread;
never@3156	75	static int _page_size;
never@3156	76
never@3156	77	static julong available_memory();
never@3156	78	static julong physical_memory() { return _physical_memory; }
never@3156	79	static void initialize_system_info();
never@3156	80
never@3156	81	static bool supports_variable_stack_size();
never@3156	82
never@3156	83	static void rebuild_cpu_to_node_map();
never@3156	84	static GrowableArray<int>* cpu_to_node() { return _cpu_to_node; }
never@3156	85
never@3156	86	static bool hugetlbfs_sanity_check(bool warn, size_t page_size);
never@3156	87
never@3156	88	public:
never@3156	89
never@3156	90	static void init_thread_fpu_state();
never@3156	91	static pthread_t main_thread(void) { return _main_thread; }
never@3156	92
never@3156	93	static void hotspot_sigmask(Thread* thread);
never@3156	94
never@3156	95	static bool is_initial_thread(void);
dsamersoff@5834	96	static pid_t gettid();
never@3156	97
never@3156	98	static int page_size(void) { return _page_size; }
never@3156	99	static void set_page_size(int val) { _page_size = val; }
never@3156	100
never@3156	101	static address ucontext_get_pc(ucontext_t* uc);
never@3156	102	static intptr_t* ucontext_get_sp(ucontext_t* uc);
never@3156	103	static intptr_t* ucontext_get_fp(ucontext_t* uc);
never@3156	104
never@3156	105	// For Analyzer Forte AsyncGetCallTrace profiling support:
never@3156	106	//
never@3156	107	// This interface should be declared in os_bsd_i486.hpp, but
never@3156	108	// that file provides extensions to the os class and not the
never@3156	109	// Bsd class.
never@3156	110	static ExtendedPC fetch_frame_from_ucontext(Thread* thread, ucontext_t* uc,
never@3156	111	intptr_t** ret_sp, intptr_t** ret_fp);
never@3156	112
never@3156	113	// This boolean allows users to forward their own non-matching signals
never@3156	114	// to JVM_handle_bsd_signal, harmlessly.
never@3156	115	static bool signal_handlers_are_installed;
never@3156	116
never@3156	117	static int get_our_sigflags(int);
never@3156	118	static void set_our_sigflags(int, int);
never@3156	119	static void signal_sets_init();
never@3156	120	static void install_signal_handlers();
never@3156	121	static void set_signal_handler(int, bool);
never@3156	122	static bool is_sig_ignored(int sig);
never@3156	123
never@3156	124	static sigset_t* unblocked_signals();
never@3156	125	static sigset_t* vm_signals();
never@3156	126	static sigset_t* allowdebug_blocked_signals();
never@3156	127
never@3156	128	// For signal-chaining
never@3156	129	static struct sigaction *get_chained_signal_action(int sig);
never@3156	130	static bool chained_handler(int sig, siginfo_t* siginfo, void* context);
never@3156	131
never@3156	132	// Minimum stack size a thread can be created with (allowing
never@3156	133	// the VM to completely create the thread and enter user code)
never@3156	134	static size_t min_stack_allowed;
never@3156	135
never@3156	136	// Return default stack size or guard size for the specified thread type
never@3156	137	static size_t default_stack_size(os::ThreadType thr_type);
never@3156	138	static size_t default_guard_size(os::ThreadType thr_type);
never@3156	139
never@3156	140	// Real-time clock functions
never@3156	141	static void clock_init(void);
never@3156	142
johnc@4017	143	static inline bool supports_monotonic_clock() {
sla@6667	144	#ifdef __APPLE__
sla@6667	145	return true;
sla@6667	146	#else
never@3156	147	return _clock_gettime != NULL;
sla@6667	148	#endif
never@3156	149	}
never@3156	150
never@3156	151	// Stack repair handling
never@3156	152
never@3156	153	// none present
never@3156	154
never@3156	155	// BsdThreads work-around for 6292965
never@3156	156	static int safe_cond_timedwait(pthread_cond_t *_cond, pthread_mutex_t *_mutex, const struct timespec *_abstime);
never@3156	157
never@3156	158	private:
never@3156	159	typedef int (*sched_getcpu_func_t)(void);
never@3156	160	typedef int (*numa_node_to_cpus_func_t)(int node, unsigned long *buffer, int bufferlen);
never@3156	161	typedef int (*numa_max_node_func_t)(void);
never@3156	162	typedef int (*numa_available_func_t)(void);
never@3156	163	typedef int (*numa_tonode_memory_func_t)(void *start, size_t size, int node);
never@3156	164	typedef void (*numa_interleave_memory_func_t)(void *start, size_t size, unsigned long *nodemask);
never@3156	165
never@3156	166	static sched_getcpu_func_t _sched_getcpu;
never@3156	167	static numa_node_to_cpus_func_t _numa_node_to_cpus;
never@3156	168	static numa_max_node_func_t _numa_max_node;
never@3156	169	static numa_available_func_t _numa_available;
never@3156	170	static numa_tonode_memory_func_t _numa_tonode_memory;
never@3156	171	static numa_interleave_memory_func_t _numa_interleave_memory;
never@3156	172	static unsigned long* _numa_all_nodes;
never@3156	173
never@3156	174	static void set_sched_getcpu(sched_getcpu_func_t func) { _sched_getcpu = func; }
never@3156	175	static void set_numa_node_to_cpus(numa_node_to_cpus_func_t func) { _numa_node_to_cpus = func; }
never@3156	176	static void set_numa_max_node(numa_max_node_func_t func) { _numa_max_node = func; }
never@3156	177	static void set_numa_available(numa_available_func_t func) { _numa_available = func; }
never@3156	178	static void set_numa_tonode_memory(numa_tonode_memory_func_t func) { _numa_tonode_memory = func; }
never@3156	179	static void set_numa_interleave_memory(numa_interleave_memory_func_t func) { _numa_interleave_memory = func; }
never@3156	180	static void set_numa_all_nodes(unsigned long* ptr) { _numa_all_nodes = ptr; }
never@3156	181	public:
never@3156	182	static int sched_getcpu() { return _sched_getcpu != NULL ? _sched_getcpu() : -1; }
never@3156	183	static int numa_node_to_cpus(int node, unsigned long *buffer, int bufferlen) {
never@3156	184	return _numa_node_to_cpus != NULL ? _numa_node_to_cpus(node, buffer, bufferlen) : -1;
never@3156	185	}
never@3156	186	static int numa_max_node() { return _numa_max_node != NULL ? _numa_max_node() : -1; }
never@3156	187	static int numa_available() { return _numa_available != NULL ? _numa_available() : -1; }
never@3156	188	static int numa_tonode_memory(void *start, size_t size, int node) {
never@3156	189	return _numa_tonode_memory != NULL ? _numa_tonode_memory(start, size, node) : -1;
never@3156	190	}
never@3156	191	static void numa_interleave_memory(void *start, size_t size) {
never@3156	192	if (_numa_interleave_memory != NULL && _numa_all_nodes != NULL) {
never@3156	193	_numa_interleave_memory(start, size, _numa_all_nodes);
never@3156	194	}
never@3156	195	}
never@3156	196	static int get_node_by_cpu(int cpu_id);
never@3156	197	};
never@3156	198
never@3156	199
zgu@3900	200	class PlatformEvent : public CHeapObj<mtInternal> {
never@3156	201	private:
never@3156	202	double CachePad [4] ; // increase odds that _mutex is sole occupant of cache line
never@3156	203	volatile int _Event ;
never@3156	204	volatile int _nParked ;
never@3156	205	pthread_mutex_t _mutex [1] ;
never@3156	206	pthread_cond_t _cond [1] ;
never@3156	207	double PostPad [2] ;
never@3156	208	Thread * _Assoc ;
never@3156	209
never@3156	210	public: // TODO-FIXME: make dtor private
never@3156	211	~PlatformEvent() { guarantee (0, "invariant") ; }
never@3156	212
never@3156	213	public:
never@3156	214	PlatformEvent() {
never@3156	215	int status;
never@3156	216	status = pthread_cond_init (_cond, NULL);
never@3156	217	assert_status(status == 0, status, "cond_init");
never@3156	218	status = pthread_mutex_init (_mutex, NULL);
never@3156	219	assert_status(status == 0, status, "mutex_init");
never@3156	220	_Event = 0 ;
never@3156	221	_nParked = 0 ;
never@3156	222	_Assoc = NULL ;
never@3156	223	}
never@3156	224
never@3156	225	// Use caution with reset() and fired() -- they may require MEMBARs
never@3156	226	void reset() { _Event = 0 ; }
never@3156	227	int fired() { return _Event; }
never@3156	228	void park () ;
never@3156	229	void unpark () ;
never@3156	230	int TryPark () ;
never@3156	231	int park (jlong millis) ;
never@3156	232	void SetAssociation (Thread * a) { _Assoc = a ; }
sla@5237	233	};
never@3156	234
zgu@3900	235	class PlatformParker : public CHeapObj<mtInternal> {
never@3156	236	protected:
never@3156	237	pthread_mutex_t _mutex [1] ;
never@3156	238	pthread_cond_t _cond [1] ;
never@3156	239
never@3156	240	public: // TODO-FIXME: make dtor private
never@3156	241	~PlatformParker() { guarantee (0, "invariant") ; }
never@3156	242
never@3156	243	public:
never@3156	244	PlatformParker() {
never@3156	245	int status;
never@3156	246	status = pthread_cond_init (_cond, NULL);
never@3156	247	assert_status(status == 0, status, "cond_init");
never@3156	248	status = pthread_mutex_init (_mutex, NULL);
never@3156	249	assert_status(status == 0, status, "mutex_init");
never@3156	250	}
sla@5237	251	};
never@3156	252
never@3156	253	#endif // OS_BSD_VM_OS_BSD_HPP