• file
• revisions
• annotate
• diff
• comparison
• raw

src/os/linux/vm/os_linux.hpp@bd02caa94611 (annotated)

src/os/linux/vm/os_linux.hpp

Tue, 28 Jul 2009 12:12:40 -0700

author

xdono

date

Tue, 28 Jul 2009 12:12:40 -0700

changeset 1279

bd02caa94611

parent 1198

cf71f149d7ae

child 1907

c18cbe5936b8

permissions

-rw-r--r--

6862919: Update copyright year
Summary: Update copyright for files that have been modified in 2009, up to 07/09
Reviewed-by: tbell, ohair

duke@435	1	/*
xdono@1279	2	* Copyright 1999-2009 Sun Microsystems, Inc. All Rights Reserved.
duke@435	3	* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
duke@435	4	*
duke@435	5	* This code is free software; you can redistribute it and/or modify it
duke@435	6	* under the terms of the GNU General Public License version 2 only, as
duke@435	7	* published by the Free Software Foundation.
duke@435	8	*
duke@435	9	* This code is distributed in the hope that it will be useful, but WITHOUT
duke@435	10	* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
duke@435	11	* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
duke@435	12	* version 2 for more details (a copy is included in the LICENSE file that
duke@435	13	* accompanied this code).
duke@435	14	*
duke@435	15	* You should have received a copy of the GNU General Public License version
duke@435	16	* 2 along with this work; if not, write to the Free Software Foundation,
duke@435	17	* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
duke@435	18	*
duke@435	19	* Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
duke@435	20	* CA 95054 USA or visit www.sun.com if you need additional information or
duke@435	21	* have any questions.
duke@435	22	*
duke@435	23	*/
duke@435	24
duke@435	25	// Linux_OS defines the interface to Linux operating systems
duke@435	26
duke@435	27	/* pthread_getattr_np comes with LinuxThreads-0.9-7 on RedHat 7.1 */
duke@435	28	typedef int (*pthread_getattr_func_type) (pthread_t, pthread_attr_t *);
duke@435	29
duke@435	30	class Linux {
duke@435	31	friend class os;
duke@435	32
duke@435	33	// For signal-chaining
duke@435	34	#define MAXSIGNUM 32
duke@435	35	static struct sigaction sigact[MAXSIGNUM]; // saved preinstalled sigactions
duke@435	36	static unsigned int sigs; // mask of signals that have
duke@435	37	// preinstalled signal handlers
duke@435	38	static bool libjsig_is_loaded; // libjsig that interposes sigaction(),
duke@435	39	// __sigaction(), signal() is loaded
duke@435	40	static struct sigaction *(*get_signal_action)(int);
duke@435	41	static struct sigaction *get_preinstalled_handler(int);
duke@435	42	static void save_preinstalled_handler(int, struct sigaction&);
duke@435	43
duke@435	44	static void check_signal_handler(int sig);
duke@435	45
duke@435	46	// For signal flags diagnostics
duke@435	47	static int sigflags[MAXSIGNUM];
duke@435	48
duke@435	49	static int (*_clock_gettime)(clockid_t, struct timespec *);
duke@435	50	static int (*_pthread_getcpuclockid)(pthread_t, clockid_t *);
duke@435	51
duke@435	52	static address _initial_thread_stack_bottom;
duke@435	53	static uintptr_t _initial_thread_stack_size;
duke@435	54
xlu@634	55	static const char *_glibc_version;
xlu@634	56	static const char *_libpthread_version;
duke@435	57
duke@435	58	static bool _is_floating_stack;
duke@435	59	static bool _is_NPTL;
duke@435	60	static bool _supports_fast_thread_cpu_time;
duke@435	61
iveresov@576	62	static GrowableArray<int>* _cpu_to_node;
iveresov@576	63
duke@435	64	protected:
duke@435	65
duke@435	66	static julong _physical_memory;
duke@435	67	static pthread_t _main_thread;
duke@435	68	static Mutex* _createThread_lock;
duke@435	69	static int _page_size;
duke@435	70
duke@435	71	static julong available_memory();
duke@435	72	static julong physical_memory() { return _physical_memory; }
duke@435	73	static void initialize_system_info();
duke@435	74
xlu@634	75	static void set_glibc_version(const char *s) { _glibc_version = s; }
xlu@634	76	static void set_libpthread_version(const char *s) { _libpthread_version = s; }
duke@435	77
duke@435	78	static bool supports_variable_stack_size();
duke@435	79
duke@435	80	static void set_is_NPTL() { _is_NPTL = true; }
duke@435	81	static void set_is_LinuxThreads() { _is_NPTL = false; }
duke@435	82	static void set_is_floating_stack() { _is_floating_stack = true; }
duke@435	83
iveresov@576	84	static void rebuild_cpu_to_node_map();
iveresov@576	85	static GrowableArray<int>* cpu_to_node() { return _cpu_to_node; }
duke@435	86	public:
duke@435	87	static void init_thread_fpu_state();
duke@435	88	static int get_fpu_control_word();
duke@435	89	static void set_fpu_control_word(int fpu_control);
duke@435	90	static pthread_t main_thread(void) { return _main_thread; }
duke@435	91	// returns kernel thread id (similar to LWP id on Solaris), which can be
duke@435	92	// used to access /proc
duke@435	93	static pid_t gettid();
duke@435	94	static void set_createThread_lock(Mutex* lk) { _createThread_lock = lk; }
duke@435	95	static Mutex* createThread_lock(void) { return _createThread_lock; }
duke@435	96	static void hotspot_sigmask(Thread* thread);
duke@435	97
duke@435	98	static address initial_thread_stack_bottom(void) { return _initial_thread_stack_bottom; }
duke@435	99	static uintptr_t initial_thread_stack_size(void) { return _initial_thread_stack_size; }
duke@435	100	static bool is_initial_thread(void);
duke@435	101
duke@435	102	static int page_size(void) { return _page_size; }
duke@435	103	static void set_page_size(int val) { _page_size = val; }
duke@435	104
duke@435	105	static address ucontext_get_pc(ucontext_t* uc);
duke@435	106	static intptr_t* ucontext_get_sp(ucontext_t* uc);
duke@435	107	static intptr_t* ucontext_get_fp(ucontext_t* uc);
duke@435	108
duke@435	109	// For Analyzer Forte AsyncGetCallTrace profiling support:
duke@435	110	//
duke@435	111	// This interface should be declared in os_linux_i486.hpp, but
duke@435	112	// that file provides extensions to the os class and not the
duke@435	113	// Linux class.
duke@435	114	static ExtendedPC fetch_frame_from_ucontext(Thread* thread, ucontext_t* uc,
duke@435	115	intptr_t** ret_sp, intptr_t** ret_fp);
duke@435	116
duke@435	117	// This boolean allows users to forward their own non-matching signals
duke@435	118	// to JVM_handle_linux_signal, harmlessly.
duke@435	119	static bool signal_handlers_are_installed;
duke@435	120
duke@435	121	static int get_our_sigflags(int);
duke@435	122	static void set_our_sigflags(int, int);
duke@435	123	static void signal_sets_init();
duke@435	124	static void install_signal_handlers();
duke@435	125	static void set_signal_handler(int, bool);
duke@435	126	static bool is_sig_ignored(int sig);
duke@435	127
duke@435	128	static sigset_t* unblocked_signals();
duke@435	129	static sigset_t* vm_signals();
duke@435	130	static sigset_t* allowdebug_blocked_signals();
duke@435	131
duke@435	132	// For signal-chaining
duke@435	133	static struct sigaction *get_chained_signal_action(int sig);
duke@435	134	static bool chained_handler(int sig, siginfo_t* siginfo, void* context);
duke@435	135
duke@435	136	// GNU libc and libpthread version strings
xlu@634	137	static const char *glibc_version() { return _glibc_version; }
xlu@634	138	static const char *libpthread_version() { return _libpthread_version; }
duke@435	139
duke@435	140	// NPTL or LinuxThreads?
duke@435	141	static bool is_LinuxThreads() { return !_is_NPTL; }
duke@435	142	static bool is_NPTL() { return _is_NPTL; }
duke@435	143
duke@435	144	// NPTL is always floating stack. LinuxThreads could be using floating
duke@435	145	// stack or fixed stack.
duke@435	146	static bool is_floating_stack() { return _is_floating_stack; }
duke@435	147
duke@435	148	static void libpthread_init();
iveresov@897	149	static bool libnuma_init();
iveresov@1198	150	static void* libnuma_dlsym(void* handle, const char* name);
duke@435	151	// Minimum stack size a thread can be created with (allowing
duke@435	152	// the VM to completely create the thread and enter user code)
duke@435	153	static size_t min_stack_allowed;
duke@435	154
duke@435	155	// Return default stack size or guard size for the specified thread type
duke@435	156	static size_t default_stack_size(os::ThreadType thr_type);
duke@435	157	static size_t default_guard_size(os::ThreadType thr_type);
duke@435	158
duke@435	159	static void capture_initial_stack(size_t max_size);
duke@435	160
duke@435	161	// Stack overflow handling
duke@435	162	static bool manually_expand_stack(JavaThread * t, address addr);
duke@435	163	static int max_register_window_saves_before_flushing();
duke@435	164
duke@435	165	// Real-time clock functions
duke@435	166	static void clock_init(void);
duke@435	167
duke@435	168	// fast POSIX clocks support
duke@435	169	static void fast_thread_clock_init(void);
duke@435	170
duke@435	171	static bool supports_monotonic_clock() {
duke@435	172	return _clock_gettime != NULL;
duke@435	173	}
duke@435	174
duke@435	175	static int clock_gettime(clockid_t clock_id, struct timespec *tp) {
duke@435	176	return _clock_gettime ? _clock_gettime(clock_id, tp) : -1;
duke@435	177	}
duke@435	178
duke@435	179	static int pthread_getcpuclockid(pthread_t tid, clockid_t *clock_id) {
duke@435	180	return _pthread_getcpuclockid ? _pthread_getcpuclockid(tid, clock_id) : -1;
duke@435	181	}
duke@435	182
duke@435	183	static bool supports_fast_thread_cpu_time() {
duke@435	184	return _supports_fast_thread_cpu_time;
duke@435	185	}
duke@435	186
duke@435	187	static jlong fast_thread_cpu_time(clockid_t clockid);
duke@435	188
duke@435	189	// Stack repair handling
duke@435	190
duke@435	191	// none present
duke@435	192
duke@435	193	// LinuxThreads work-around for 6292965
duke@435	194	static int safe_cond_timedwait(pthread_cond_t *_cond, pthread_mutex_t *_mutex, const struct timespec *_abstime);
duke@435	195
duke@435	196
duke@435	197	// Linux suspend/resume support - this helper is a shadow of its former
duke@435	198	// self now that low-level suspension is barely used, and old workarounds
duke@435	199	// for LinuxThreads are no longer needed.
duke@435	200	class SuspendResume {
duke@435	201	private:
duke@435	202	volatile int _suspend_action;
duke@435	203	// values for suspend_action:
duke@435	204	#define SR_NONE (0x00)
duke@435	205	#define SR_SUSPEND (0x01) // suspend request
duke@435	206	#define SR_CONTINUE (0x02) // resume request
duke@435	207
duke@435	208	volatile jint _state;
duke@435	209	// values for _state: + SR_NONE
duke@435	210	#define SR_SUSPENDED (0x20)
duke@435	211	public:
duke@435	212	SuspendResume() { _suspend_action = SR_NONE; _state = SR_NONE; }
duke@435	213
duke@435	214	int suspend_action() const { return _suspend_action; }
duke@435	215	void set_suspend_action(int x) { _suspend_action = x; }
duke@435	216
duke@435	217	// atomic updates for _state
duke@435	218	void set_suspended() {
duke@435	219	jint temp, temp2;
duke@435	220	do {
duke@435	221	temp = _state;
duke@435	222	temp2 = Atomic::cmpxchg(temp | SR_SUSPENDED, &_state, temp);
duke@435	223	} while (temp2 != temp);
duke@435	224	}
duke@435	225	void clear_suspended() {
duke@435	226	jint temp, temp2;
duke@435	227	do {
duke@435	228	temp = _state;
duke@435	229	temp2 = Atomic::cmpxchg(temp & ~SR_SUSPENDED, &_state, temp);
duke@435	230	} while (temp2 != temp);
duke@435	231	}
duke@435	232	bool is_suspended() { return _state & SR_SUSPENDED; }
duke@435	233
duke@435	234	#undef SR_SUSPENDED
duke@435	235	};
iveresov@576	236
iveresov@576	237	private:
iveresov@576	238	typedef int (*sched_getcpu_func_t)(void);
iveresov@576	239	typedef int (*numa_node_to_cpus_func_t)(int node, unsigned long *buffer, int bufferlen);
iveresov@576	240	typedef int (*numa_max_node_func_t)(void);
iveresov@576	241	typedef int (*numa_available_func_t)(void);
iveresov@576	242	typedef int (*numa_tonode_memory_func_t)(void *start, size_t size, int node);
iveresov@897	243	typedef void (*numa_interleave_memory_func_t)(void *start, size_t size, unsigned long *nodemask);
iveresov@576	244
iveresov@576	245	static sched_getcpu_func_t _sched_getcpu;
iveresov@576	246	static numa_node_to_cpus_func_t _numa_node_to_cpus;
iveresov@576	247	static numa_max_node_func_t _numa_max_node;
iveresov@576	248	static numa_available_func_t _numa_available;
iveresov@576	249	static numa_tonode_memory_func_t _numa_tonode_memory;
iveresov@897	250	static numa_interleave_memory_func_t _numa_interleave_memory;
iveresov@897	251	static unsigned long* _numa_all_nodes;
iveresov@576	252
iveresov@576	253	static void set_sched_getcpu(sched_getcpu_func_t func) { _sched_getcpu = func; }
iveresov@576	254	static void set_numa_node_to_cpus(numa_node_to_cpus_func_t func) { _numa_node_to_cpus = func; }
iveresov@576	255	static void set_numa_max_node(numa_max_node_func_t func) { _numa_max_node = func; }
iveresov@576	256	static void set_numa_available(numa_available_func_t func) { _numa_available = func; }
iveresov@576	257	static void set_numa_tonode_memory(numa_tonode_memory_func_t func) { _numa_tonode_memory = func; }
iveresov@897	258	static void set_numa_interleave_memory(numa_interleave_memory_func_t func) { _numa_interleave_memory = func; }
iveresov@897	259	static void set_numa_all_nodes(unsigned long* ptr) { _numa_all_nodes = ptr; }
iveresov@576	260	public:
iveresov@576	261	static int sched_getcpu() { return _sched_getcpu != NULL ? _sched_getcpu() : -1; }
iveresov@576	262	static int numa_node_to_cpus(int node, unsigned long *buffer, int bufferlen) {
iveresov@576	263	return _numa_node_to_cpus != NULL ? _numa_node_to_cpus(node, buffer, bufferlen) : -1;
iveresov@576	264	}
iveresov@576	265	static int numa_max_node() { return _numa_max_node != NULL ? _numa_max_node() : -1; }
iveresov@576	266	static int numa_available() { return _numa_available != NULL ? _numa_available() : -1; }
iveresov@576	267	static int numa_tonode_memory(void *start, size_t size, int node) {
iveresov@576	268	return _numa_tonode_memory != NULL ? _numa_tonode_memory(start, size, node) : -1;
iveresov@576	269	}
iveresov@897	270	static void numa_interleave_memory(void *start, size_t size) {
iveresov@897	271	if (_numa_interleave_memory != NULL && _numa_all_nodes != NULL) {
iveresov@897	272	_numa_interleave_memory(start, size, _numa_all_nodes);
iveresov@897	273	}
iveresov@897	274	}
iveresov@576	275	static int get_node_by_cpu(int cpu_id);
duke@435	276	};
duke@435	277
duke@435	278
duke@435	279	class PlatformEvent : public CHeapObj {
duke@435	280	private:
duke@435	281	double CachePad [4] ; // increase odds that _mutex is sole occupant of cache line
duke@435	282	volatile int _Event ;
duke@435	283	volatile int _nParked ;
duke@435	284	pthread_mutex_t _mutex [1] ;
duke@435	285	pthread_cond_t _cond [1] ;
duke@435	286	double PostPad [2] ;
duke@435	287	Thread * _Assoc ;
duke@435	288
duke@435	289	public: // TODO-FIXME: make dtor private
duke@435	290	~PlatformEvent() { guarantee (0, "invariant") ; }
duke@435	291
duke@435	292	public:
duke@435	293	PlatformEvent() {
duke@435	294	int status;
duke@435	295	status = pthread_cond_init (_cond, NULL);
duke@435	296	assert_status(status == 0, status, "cond_init");
duke@435	297	status = pthread_mutex_init (_mutex, NULL);
duke@435	298	assert_status(status == 0, status, "mutex_init");
duke@435	299	_Event = 0 ;
duke@435	300	_nParked = 0 ;
duke@435	301	_Assoc = NULL ;
duke@435	302	}
duke@435	303
duke@435	304	// Use caution with reset() and fired() -- they may require MEMBARs
duke@435	305	void reset() { _Event = 0 ; }
duke@435	306	int fired() { return _Event; }
duke@435	307	void park () ;
duke@435	308	void unpark () ;
duke@435	309	int TryPark () ;
duke@435	310	int park (jlong millis) ;
duke@435	311	void SetAssociation (Thread * a) { _Assoc = a ; }
duke@435	312	} ;
duke@435	313
duke@435	314	class PlatformParker : public CHeapObj {
duke@435	315	protected:
duke@435	316	pthread_mutex_t _mutex [1] ;
duke@435	317	pthread_cond_t _cond [1] ;
duke@435	318
duke@435	319	public: // TODO-FIXME: make dtor private
duke@435	320	~PlatformParker() { guarantee (0, "invariant") ; }
duke@435	321
duke@435	322	public:
duke@435	323	PlatformParker() {
duke@435	324	int status;
duke@435	325	status = pthread_cond_init (_cond, NULL);
duke@435	326	assert_status(status == 0, status, "cond_init");
duke@435	327	status = pthread_mutex_init (_mutex, NULL);
duke@435	328	assert_status(status == 0, status, "mutex_init");
duke@435	329	}
duke@435	330	} ;