1.1 --- /dev/null Thu Jan 01 00:00:00 1970 +0000
1.2 +++ b/src/os/aix/vm/os_aix.hpp Wed Apr 27 01:25:04 2016 +0800
1.3 @@ -0,0 +1,385 @@
1.4 +/*
1.5 + * Copyright (c) 1999, 2013, Oracle and/or its affiliates. All rights reserved.
1.6 + * Copyright 2013 SAP AG. All rights reserved.
1.7 + * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
1.8 + *
1.9 + * This code is free software; you can redistribute it and/or modify it
1.10 + * under the terms of the GNU General Public License version 2 only, as
1.11 + * published by the Free Software Foundation.
1.12 + *
1.13 + * This code is distributed in the hope that it will be useful, but WITHOUT
1.14 + * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
1.15 + * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
1.16 + * version 2 for more details (a copy is included in the LICENSE file that
1.17 + * accompanied this code).
1.18 + *
1.19 + * You should have received a copy of the GNU General Public License version
1.20 + * 2 along with this work; if not, write to the Free Software Foundation,
1.21 + * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
1.22 + *
1.23 + * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
1.24 + * or visit www.oracle.com if you need additional information or have any
1.25 + * questions.
1.26 + *
1.27 + */
1.28 +
1.29 +#ifndef OS_AIX_VM_OS_AIX_HPP
1.30 +#define OS_AIX_VM_OS_AIX_HPP
1.31 +
1.32 +// Information about the protection of the page at address '0' on this os.
1.33 +static bool zero_page_read_protected() { return false; }
1.34 +
1.35 +// Class Aix defines the interface to the Aix operating systems.
1.36 +
1.37 +class Aix {
1.38 + friend class os;
1.39 +
1.40 + // For signal-chaining
1.41 + // highest so far (AIX 5.2) is SIGSAK (63)
1.42 +#define MAXSIGNUM 63
1.43 + // length of strings included in the libperfstat structures
1.44 +#define IDENTIFIER_LENGTH 64
1.45 +
1.46 + static struct sigaction sigact[MAXSIGNUM]; // saved preinstalled sigactions
1.47 + static unsigned int sigs; // mask of signals that have
1.48 + // preinstalled signal handlers
1.49 + static bool libjsig_is_loaded; // libjsig that interposes sigaction(),
1.50 + // __sigaction(), signal() is loaded
1.51 + static struct sigaction *(*get_signal_action)(int);
1.52 + static struct sigaction *get_preinstalled_handler(int);
1.53 + static void save_preinstalled_handler(int, struct sigaction&);
1.54 +
1.55 + static void check_signal_handler(int sig);
1.56 +
1.57 + // For signal flags diagnostics
1.58 + static int sigflags[MAXSIGNUM];
1.59 +
1.60 + protected:
1.61 +
1.62 + static julong _physical_memory;
1.63 + static pthread_t _main_thread;
1.64 + static Mutex* _createThread_lock;
1.65 + static int _page_size;
1.66 + static int _logical_cpus;
1.67 +
1.68 + // -1 = uninitialized, 0 = AIX, 1 = OS/400 (PASE)
1.69 + static int _on_pase;
1.70 +
1.71 + // -1 = uninitialized, otherwise 16 bit number:
1.72 + // lower 8 bit - minor version
1.73 + // higher 8 bit - major version
1.74 + // For AIX, e.g. 0x0601 for AIX 6.1
1.75 + // for OS/400 e.g. 0x0504 for OS/400 V5R4
1.76 + static int _os_version;
1.77 +
1.78 + // -1 = uninitialized,
1.79 + // 0 - SPEC1170 not requested (XPG_SUS_ENV is OFF or not set)
1.80 + // 1 - SPEC1170 requested (XPG_SUS_ENV is ON)
1.81 + static int _xpg_sus_mode;
1.82 +
1.83 + // -1 = uninitialized,
1.84 + // 0 - EXTSHM=OFF or not set
1.85 + // 1 - EXTSHM=ON
1.86 + static int _extshm;
1.87 +
1.88 + // page sizes on AIX.
1.89 + //
1.90 + // AIX supports four different page sizes - 4K, 64K, 16MB, 16GB. The latter two
1.91 + // (16M "large" resp. 16G "huge" pages) require special setup and are normally
1.92 + // not available.
1.93 + //
1.94 + // AIX supports multiple page sizes per process, for:
1.95 + // - Stack (of the primordial thread, so not relevant for us)
1.96 + // - Data - data, bss, heap, for us also pthread stacks
1.97 + // - Text - text code
1.98 + // - shared memory
1.99 + //
1.100 + // Default page sizes can be set via linker options (-bdatapsize, -bstacksize, ...)
1.101 + // and via environment variable LDR_CNTRL (DATAPSIZE, STACKPSIZE, ...)
1.102 + //
1.103 + // For shared memory, page size can be set dynamically via shmctl(). Different shared memory
1.104 + // regions can have different page sizes.
1.105 + //
1.106 + // More information can be found at AIBM info center:
1.107 + // http://publib.boulder.ibm.com/infocenter/aix/v6r1/index.jsp?topic=/com.ibm.aix.prftungd/doc/prftungd/multiple_page_size_app_support.htm
1.108 + //
1.109 + // -----
1.110 + // We want to support 4K and 64K and, if the machine is set up correctly, 16MB pages.
1.111 + //
1.112 +
1.113 + // page size of the stack of newly created pthreads
1.114 + // (should be LDR_CNTRL DATAPSIZE because stack is allocated on heap by pthread lib)
1.115 + static int _stack_page_size;
1.116 +
1.117 + // Default shm page size. Read: what page size shared memory will be backed
1.118 + // with if no page size was set explicitly using shmctl(SHM_PAGESIZE).
1.119 + // Should be LDR_CNTRL SHMPSIZE.
1.120 + static size_t _shm_default_page_size;
1.121 +
1.122 + // True if sys V shm can be used with 64K pages dynamically.
1.123 + // (via shmctl(.. SHM_PAGESIZE..). Should be true for AIX 53 and
1.124 + // newer / PASE V6R1 and newer. (0 or 1, -1 if not initialized)
1.125 + static int _can_use_64K_pages;
1.126 +
1.127 + // True if sys V shm can be used with 16M pages dynamically.
1.128 + // (via shmctl(.. SHM_PAGESIZE..). Only true on AIX 5.3 and
1.129 + // newer, if the system was set up to use 16M pages and the
1.130 + // jvm has enough user rights. (0 or 1, -1 if not initialized)
1.131 + static int _can_use_16M_pages;
1.132 +
1.133 + static julong available_memory();
1.134 + static julong physical_memory() { return _physical_memory; }
1.135 + static void initialize_system_info();
1.136 +
1.137 + // OS recognitions (PASE/AIX, OS level) call this before calling any
1.138 + // one of Aix::on_pase(), Aix::os_version().
1.139 + static void initialize_os_info();
1.140 +
1.141 + static int commit_memory_impl(char* addr, size_t bytes, bool exec);
1.142 + static int commit_memory_impl(char* addr, size_t bytes,
1.143 + size_t alignment_hint, bool exec);
1.144 +
1.145 + // Scan environment for important settings which might effect the
1.146 + // VM. Trace out settings. Warn about invalid settings and/or
1.147 + // correct them.
1.148 + //
1.149 + // Must run after os::Aix::initialue_os_info().
1.150 + static void scan_environment();
1.151 +
1.152 + // Retrieve information about multipage size support. Will initialize
1.153 + // _page_size, _stack_page_size, _can_use_64K_pages/_can_use_16M_pages
1.154 + static void query_multipage_support();
1.155 +
1.156 + // Initialize libo4 (on PASE) and libperfstat (on AIX). Call this
1.157 + // before relying on functions from either lib, e.g. Aix::get_meminfo().
1.158 + static void initialize_libo4();
1.159 + static void initialize_libperfstat();
1.160 +
1.161 + static bool supports_variable_stack_size();
1.162 +
1.163 + public:
1.164 + static void init_thread_fpu_state();
1.165 + static pthread_t main_thread(void) { return _main_thread; }
1.166 + // returns kernel thread id (similar to LWP id on Solaris), which can be
1.167 + // used to access /proc
1.168 + static pid_t gettid();
1.169 + static void set_createThread_lock(Mutex* lk) { _createThread_lock = lk; }
1.170 + static Mutex* createThread_lock(void) { return _createThread_lock; }
1.171 + static void hotspot_sigmask(Thread* thread);
1.172 +
1.173 + // Given an address, returns the size of the page backing that address
1.174 + static size_t query_pagesize(void* p);
1.175 +
1.176 + // Return `true' if the calling thread is the primordial thread. The
1.177 + // primordial thread is the thread which contains the main function,
1.178 + // *not* necessarily the thread which initialized the VM by calling
1.179 + // JNI_CreateJavaVM.
1.180 + static bool is_primordial_thread(void);
1.181 +
1.182 + static int page_size(void) {
1.183 + assert(_page_size != -1, "not initialized");
1.184 + return _page_size;
1.185 + }
1.186 +
1.187 + // Accessor methods for stack page size which may be different from usual page size.
1.188 + static int stack_page_size(void) {
1.189 + assert(_stack_page_size != -1, "not initialized");
1.190 + return _stack_page_size;
1.191 + }
1.192 +
1.193 + // default shm page size. Read: what page size shared memory
1.194 + // will be backed with if no page size was set explicitly using shmctl(SHM_PAGESIZE).
1.195 + // Should be LDR_CNTRL SHMPSIZE.
1.196 + static int shm_default_page_size(void) {
1.197 + assert(_shm_default_page_size != -1, "not initialized");
1.198 + return _shm_default_page_size;
1.199 + }
1.200 +
1.201 + // Return true if sys V shm can be used with 64K pages dynamically
1.202 + // (via shmctl(.. SHM_PAGESIZE..).
1.203 + static bool can_use_64K_pages () {
1.204 + assert(_can_use_64K_pages != -1, "not initialized");
1.205 + return _can_use_64K_pages == 1 ? true : false;
1.206 + }
1.207 +
1.208 + // Return true if sys V shm can be used with 16M pages dynamically.
1.209 + // (via shmctl(.. SHM_PAGESIZE..).
1.210 + static bool can_use_16M_pages () {
1.211 + assert(_can_use_16M_pages != -1, "not initialized");
1.212 + return _can_use_16M_pages == 1 ? true : false;
1.213 + }
1.214 +
1.215 + static address ucontext_get_pc(ucontext_t* uc);
1.216 + static intptr_t* ucontext_get_sp(ucontext_t* uc);
1.217 + static intptr_t* ucontext_get_fp(ucontext_t* uc);
1.218 + // Set PC into context. Needed for continuation after signal.
1.219 + static void ucontext_set_pc(ucontext_t* uc, address pc);
1.220 +
1.221 + // This boolean allows users to forward their own non-matching signals
1.222 + // to JVM_handle_aix_signal, harmlessly.
1.223 + static bool signal_handlers_are_installed;
1.224 +
1.225 + static int get_our_sigflags(int);
1.226 + static void set_our_sigflags(int, int);
1.227 + static void signal_sets_init();
1.228 + static void install_signal_handlers();
1.229 + static void set_signal_handler(int, bool);
1.230 + static bool is_sig_ignored(int sig);
1.231 +
1.232 + static sigset_t* unblocked_signals();
1.233 + static sigset_t* vm_signals();
1.234 + static sigset_t* allowdebug_blocked_signals();
1.235 +
1.236 + // For signal-chaining
1.237 + static struct sigaction *get_chained_signal_action(int sig);
1.238 + static bool chained_handler(int sig, siginfo_t* siginfo, void* context);
1.239 +
1.240 + // libpthread version string
1.241 + static void libpthread_init();
1.242 +
1.243 + // Minimum stack size a thread can be created with (allowing
1.244 + // the VM to completely create the thread and enter user code)
1.245 + static size_t min_stack_allowed;
1.246 +
1.247 + // Return default stack size or guard size for the specified thread type
1.248 + static size_t default_stack_size(os::ThreadType thr_type);
1.249 + static size_t default_guard_size(os::ThreadType thr_type);
1.250 +
1.251 + // Function returns true if we run on OS/400 (pase), false if we run
1.252 + // on AIX.
1.253 + static bool on_pase() {
1.254 + assert(_on_pase != -1, "not initialized");
1.255 + return _on_pase ? true : false;
1.256 + }
1.257 +
1.258 + // Function returns true if we run on AIX, false if we run on OS/400
1.259 + // (pase).
1.260 + static bool on_aix() {
1.261 + assert(_on_pase != -1, "not initialized");
1.262 + return _on_pase ? false : true;
1.263 + }
1.264 +
1.265 + // -1 = uninitialized, otherwise 16 bit number:
1.266 + // lower 8 bit - minor version
1.267 + // higher 8 bit - major version
1.268 + // For AIX, e.g. 0x0601 for AIX 6.1
1.269 + // for OS/400 e.g. 0x0504 for OS/400 V5R4
1.270 + static int os_version () {
1.271 + assert(_os_version != -1, "not initialized");
1.272 + return _os_version;
1.273 + }
1.274 +
1.275 + // Convenience method: returns true if running on AIX 5.3 or older.
1.276 + static bool on_aix_53_or_older() {
1.277 + return on_aix() && os_version() <= 0x0503;
1.278 + }
1.279 +
1.280 + // Returns true if we run in SPEC1170 compliant mode (XPG_SUS_ENV=ON).
1.281 + static bool xpg_sus_mode() {
1.282 + assert(_xpg_sus_mode != -1, "not initialized");
1.283 + return _xpg_sus_mode;
1.284 + }
1.285 +
1.286 + // Returns true if EXTSHM=ON.
1.287 + static bool extshm() {
1.288 + assert(_extshm != -1, "not initialized");
1.289 + return _extshm;
1.290 + }
1.291 +
1.292 + // result struct for get_meminfo()
1.293 + struct meminfo_t {
1.294 +
1.295 + // Amount of virtual memory (in units of 4 KB pages)
1.296 + unsigned long long virt_total;
1.297 +
1.298 + // Amount of real memory, in bytes
1.299 + unsigned long long real_total;
1.300 +
1.301 + // Amount of free real memory, in bytes
1.302 + unsigned long long real_free;
1.303 +
1.304 + // Total amount of paging space, in bytes
1.305 + unsigned long long pgsp_total;
1.306 +
1.307 + // Amount of free paging space, in bytes
1.308 + unsigned long long pgsp_free;
1.309 +
1.310 + };
1.311 +
1.312 + // Result struct for get_cpuinfo().
1.313 + struct cpuinfo_t {
1.314 + char description[IDENTIFIER_LENGTH]; // processor description (type/official name)
1.315 + u_longlong_t processorHZ; // processor speed in Hz
1.316 + int ncpus; // number of active logical processors
1.317 + double loadavg[3]; // (1<<SBITS) times the average number of runnables processes during the last 1, 5 and 15 minutes.
1.318 + // To calculate the load average, divide the numbers by (1<<SBITS). SBITS is defined in <sys/proc.h>.
1.319 + char version[20]; // processor version from _system_configuration (sys/systemcfg.h)
1.320 + };
1.321 +
1.322 + // Functions to retrieve memory information on AIX, PASE.
1.323 + // (on AIX, using libperfstat, on PASE with libo4.so).
1.324 + // Returns true if ok, false if error.
1.325 + static bool get_meminfo(meminfo_t* pmi);
1.326 +
1.327 + // Function to retrieve cpu information on AIX
1.328 + // (on AIX, using libperfstat)
1.329 + // Returns true if ok, false if error.
1.330 + static bool get_cpuinfo(cpuinfo_t* pci);
1.331 +
1.332 +}; // os::Aix class
1.333 +
1.334 +
1.335 +class PlatformEvent : public CHeapObj<mtInternal> {
1.336 + private:
1.337 + double CachePad [4]; // increase odds that _mutex is sole occupant of cache line
1.338 + volatile int _Event;
1.339 + volatile int _nParked;
1.340 + pthread_mutex_t _mutex [1];
1.341 + pthread_cond_t _cond [1];
1.342 + double PostPad [2];
1.343 + Thread * _Assoc;
1.344 +
1.345 + public: // TODO-FIXME: make dtor private
1.346 + ~PlatformEvent() { guarantee (0, "invariant"); }
1.347 +
1.348 + public:
1.349 + PlatformEvent() {
1.350 + int status;
1.351 + status = pthread_cond_init (_cond, NULL);
1.352 + assert_status(status == 0, status, "cond_init");
1.353 + status = pthread_mutex_init (_mutex, NULL);
1.354 + assert_status(status == 0, status, "mutex_init");
1.355 + _Event = 0;
1.356 + _nParked = 0;
1.357 + _Assoc = NULL;
1.358 + }
1.359 +
1.360 + // Use caution with reset() and fired() -- they may require MEMBARs
1.361 + void reset() { _Event = 0; }
1.362 + int fired() { return _Event; }
1.363 + void park ();
1.364 + void unpark ();
1.365 + int TryPark ();
1.366 + int park (jlong millis);
1.367 + void SetAssociation (Thread * a) { _Assoc = a; }
1.368 +};
1.369 +
1.370 +class PlatformParker : public CHeapObj<mtInternal> {
1.371 + protected:
1.372 + pthread_mutex_t _mutex [1];
1.373 + pthread_cond_t _cond [1];
1.374 +
1.375 + public: // TODO-FIXME: make dtor private
1.376 + ~PlatformParker() { guarantee (0, "invariant"); }
1.377 +
1.378 + public:
1.379 + PlatformParker() {
1.380 + int status;
1.381 + status = pthread_cond_init (_cond, NULL);
1.382 + assert_status(status == 0, status, "cond_init");
1.383 + status = pthread_mutex_init (_mutex, NULL);
1.384 + assert_status(status == 0, status, "mutex_init");
1.385 + }
1.386 +};
1.387 +
1.388 +#endif // OS_AIX_VM_OS_AIX_HPP
