jdk8-mips64-public/hotspot: comparison src/os/aix/vm/os

-:b83f7d608548
+:666e6ce3976c
+/*
+* Copyright (c) 1999, 2013, Oracle and/or its affiliates. All rights reserved.
+* Copyright 2013 SAP AG. All rights reserved.
+* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+*
+* This code is free software; you can redistribute it and/or modify it
+* under the terms of the GNU General Public License version 2 only, as
+* published by the Free Software Foundation.
+*
+* This code is distributed in the hope that it will be useful, but WITHOUT
+* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+* FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+* version 2 for more details (a copy is included in the LICENSE file that
+* accompanied this code).
+*
+* You should have received a copy of the GNU General Public License version
+* 2 along with this work; if not, write to the Free Software Foundation,
+* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+*
+* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+* or visit www.oracle.com if you need additional information or have any
+* questions.
+*
+*/
+#ifndef OS_AIX_VM_OS_AIX_HPP
+#define OS_AIX_VM_OS_AIX_HPP
+// Information about the protection of the page at address '0' on this os.
+static bool zero_page_read_protected() { return false; }
+// Class Aix defines the interface to the Aix operating systems.
+class Aix {
+friend class os;
+// For signal-chaining
+// highest so far (AIX 5.2) is SIGSAK (63)
+#define MAXSIGNUM 63
+// length of strings included in the libperfstat structures
+#define IDENTIFIER_LENGTH 64
+static struct sigaction sigact[MAXSIGNUM]; // saved preinstalled sigactions
+static unsigned int sigs;             // mask of signals that have
+// preinstalled signal handlers
+static bool libjsig_is_loaded;        // libjsig that interposes sigaction(),
+// __sigaction(), signal() is loaded
+static struct sigaction *(*get_signal_action)(int);
+static struct sigaction *get_preinstalled_handler(int);
+static void save_preinstalled_handler(int, struct sigaction&);
+static void check_signal_handler(int sig);
+// For signal flags diagnostics
+static int sigflags[MAXSIGNUM];
+protected:
+static julong _physical_memory;
+static pthread_t _main_thread;
+static Mutex* _createThread_lock;
+static int _page_size;
+static int _logical_cpus;
+// -1 = uninitialized, 0 = AIX, 1 = OS/400 (PASE)
+static int _on_pase;
+// -1 = uninitialized, otherwise 16 bit number:
+//  lower 8 bit - minor version
+//  higher 8 bit - major version
+//  For AIX, e.g. 0x0601 for AIX 6.1
+//  for OS/400 e.g. 0x0504 for OS/400 V5R4
+static int _os_version;
+// -1 = uninitialized,
+//  0 - SPEC1170 not requested (XPG_SUS_ENV is OFF or not set)
+//  1 - SPEC1170 requested (XPG_SUS_ENV is ON)
+static int _xpg_sus_mode;
+// -1 = uninitialized,
+//  0 - EXTSHM=OFF or not set
+//  1 - EXTSHM=ON
+static int _extshm;
+// page sizes on AIX.
+//
+//  AIX supports four different page sizes - 4K, 64K, 16MB, 16GB. The latter two
+//  (16M "large" resp. 16G "huge" pages) require special setup and are normally
+//  not available.
+//
+//  AIX supports multiple page sizes per process, for:
+//  - Stack (of the primordial thread, so not relevant for us)
+//  - Data - data, bss, heap, for us also pthread stacks
+//  - Text - text code
+//  - shared memory
+//
+//  Default page sizes can be set via linker options (-bdatapsize, -bstacksize, ...)
+//  and via environment variable LDR_CNTRL (DATAPSIZE, STACKPSIZE, ...)
+//
+//  For shared memory, page size can be set dynamically via shmctl(). Different shared memory
+//  regions can have different page sizes.
+//
+//  More information can be found at AIBM info center:
+//   http://publib.boulder.ibm.com/infocenter/aix/v6r1/index.jsp?topic=/com.ibm.aix.prftungd/doc/prftungd/multiple_page_size_app_support.htm
+//
+// -----
+//  We want to support 4K and 64K and, if the machine is set up correctly, 16MB pages.
+//
+// page size of the stack of newly created pthreads
+// (should be LDR_CNTRL DATAPSIZE because stack is allocated on heap by pthread lib)
+static int _stack_page_size;
+// Default shm page size. Read: what page size shared memory will be backed
+// with if no page size was set explicitly using shmctl(SHM_PAGESIZE).
+// Should be LDR_CNTRL SHMPSIZE.
+static size_t _shm_default_page_size;
+// True if sys V shm can be used with 64K pages dynamically.
+// (via shmctl(.. SHM_PAGESIZE..). Should be true for AIX 53 and
+// newer / PASE V6R1 and newer. (0 or 1, -1 if not initialized)
+static int _can_use_64K_pages;
+// True if sys V shm can be used with 16M pages dynamically.
+// (via shmctl(.. SHM_PAGESIZE..). Only true on AIX 5.3 and
+// newer, if the system was set up to use 16M pages and the
+// jvm has enough user rights. (0 or 1, -1 if not initialized)
+static int _can_use_16M_pages;
+static julong available_memory();
+static julong physical_memory() { return _physical_memory; }
+static void initialize_system_info();
+// OS recognitions (PASE/AIX, OS level) call this before calling any
+// one of Aix::on_pase(), Aix::os_version().
+static void initialize_os_info();
+static int commit_memory_impl(char* addr, size_t bytes, bool exec);
+static int commit_memory_impl(char* addr, size_t bytes,
+size_t alignment_hint, bool exec);
+// Scan environment for important settings which might effect the
+// VM. Trace out settings. Warn about invalid settings and/or
+// correct them.
+//
+// Must run after os::Aix::initialue_os_info().
+static void scan_environment();
+// Retrieve information about multipage size support. Will initialize
+// _page_size, _stack_page_size, _can_use_64K_pages/_can_use_16M_pages
+static void query_multipage_support();
+// Initialize libo4 (on PASE) and libperfstat (on AIX). Call this
+// before relying on functions from either lib, e.g. Aix::get_meminfo().
+static void initialize_libo4();
+static void initialize_libperfstat();
+static bool supports_variable_stack_size();
+public:
+static void init_thread_fpu_state();
+static pthread_t main_thread(void)                                { return _main_thread; }
+// returns kernel thread id (similar to LWP id on Solaris), which can be
+// used to access /proc
+static pid_t gettid();
+static void set_createThread_lock(Mutex* lk)                      { _createThread_lock = lk; }
+static Mutex* createThread_lock(void)                             { return _createThread_lock; }
+static void hotspot_sigmask(Thread* thread);
+// Given an address, returns the size of the page backing that address
+static size_t query_pagesize(void* p);
+// Return `true' if the calling thread is the primordial thread. The
+// primordial thread is the thread which contains the main function,
+// *not* necessarily the thread which initialized the VM by calling
+// JNI_CreateJavaVM.
+static bool is_primordial_thread(void);
+static int page_size(void) {
+assert(_page_size != -1, "not initialized");
+return _page_size;
+}
+// Accessor methods for stack page size which may be different from usual page size.
+static int stack_page_size(void) {
+assert(_stack_page_size != -1, "not initialized");
+return _stack_page_size;
+}
+// default shm page size. Read: what page size shared memory
+// will be backed with if no page size was set explicitly using shmctl(SHM_PAGESIZE).
+// Should be LDR_CNTRL SHMPSIZE.
+static int shm_default_page_size(void) {
+assert(_shm_default_page_size != -1, "not initialized");
+return _shm_default_page_size;
+}
+// Return true if sys V shm can be used with 64K pages dynamically
+// (via shmctl(.. SHM_PAGESIZE..).
+static bool can_use_64K_pages () {
+assert(_can_use_64K_pages != -1,  "not initialized");
+return _can_use_64K_pages == 1 ? true : false;
+}
+// Return true if sys V shm can be used with 16M pages dynamically.
+// (via shmctl(.. SHM_PAGESIZE..).
+static bool can_use_16M_pages () {
+assert(_can_use_16M_pages != -1,  "not initialized");
+return _can_use_16M_pages == 1 ? true : false;
+}
+static address   ucontext_get_pc(ucontext_t* uc);
+static intptr_t* ucontext_get_sp(ucontext_t* uc);
+static intptr_t* ucontext_get_fp(ucontext_t* uc);
+// Set PC into context. Needed for continuation after signal.
+static void ucontext_set_pc(ucontext_t* uc, address pc);
+// This boolean allows users to forward their own non-matching signals
+// to JVM_handle_aix_signal, harmlessly.
+static bool signal_handlers_are_installed;
+static int get_our_sigflags(int);
+static void set_our_sigflags(int, int);
+static void signal_sets_init();
+static void install_signal_handlers();
+static void set_signal_handler(int, bool);
+static bool is_sig_ignored(int sig);
+static sigset_t* unblocked_signals();
+static sigset_t* vm_signals();
+static sigset_t* allowdebug_blocked_signals();
+// For signal-chaining
+static struct sigaction *get_chained_signal_action(int sig);
+static bool chained_handler(int sig, siginfo_t* siginfo, void* context);
+// libpthread version string
+static void libpthread_init();
+// Minimum stack size a thread can be created with (allowing
+// the VM to completely create the thread and enter user code)
+static size_t min_stack_allowed;
+// Return default stack size or guard size for the specified thread type
+static size_t default_stack_size(os::ThreadType thr_type);
+static size_t default_guard_size(os::ThreadType thr_type);
+// Function returns true if we run on OS/400 (pase), false if we run
+// on AIX.
+static bool on_pase() {
+assert(_on_pase != -1, "not initialized");
+return _on_pase ? true : false;
+}
+// Function returns true if we run on AIX, false if we run on OS/400
+// (pase).
+static bool on_aix() {
+assert(_on_pase != -1, "not initialized");
+return _on_pase ? false : true;
+}
+// -1 = uninitialized, otherwise 16 bit number:
+// lower 8 bit - minor version
+// higher 8 bit - major version
+// For AIX, e.g. 0x0601 for AIX 6.1
+// for OS/400 e.g. 0x0504 for OS/400 V5R4
+static int os_version () {
+assert(_os_version != -1, "not initialized");
+return _os_version;
+}
+// Convenience method: returns true if running on AIX 5.3 or older.
+static bool on_aix_53_or_older() {
+return on_aix() && os_version() <= 0x0503;
+}
+// Returns true if we run in SPEC1170 compliant mode (XPG_SUS_ENV=ON).
+static bool xpg_sus_mode() {
+assert(_xpg_sus_mode != -1, "not initialized");
+return _xpg_sus_mode;
+}
+// Returns true if EXTSHM=ON.
+static bool extshm() {
+assert(_extshm != -1, "not initialized");
+return _extshm;
+}
+// result struct for get_meminfo()
+struct meminfo_t {
+// Amount of virtual memory (in units of 4 KB pages)
+unsigned long long virt_total;
+// Amount of real memory, in bytes
+unsigned long long real_total;
+// Amount of free real memory, in bytes
+unsigned long long real_free;
+// Total amount of paging space, in bytes
+unsigned long long pgsp_total;
+// Amount of free paging space, in bytes
+unsigned long long pgsp_free;
+};
+// Result struct for get_cpuinfo().
+struct cpuinfo_t {
+char description[IDENTIFIER_LENGTH];  // processor description (type/official name)
+u_longlong_t processorHZ;             // processor speed in Hz
+int ncpus;                            // number of active logical processors
+double loadavg[3];                    // (1<<SBITS) times the average number of runnables processes during the last 1, 5 and 15 minutes.
+// To calculate the load average, divide the numbers by (1<<SBITS). SBITS is defined in <sys/proc.h>.
+char version[20];                     // processor version from _system_configuration (sys/systemcfg.h)
+};
+// Functions to retrieve memory information on AIX, PASE.
+// (on AIX, using libperfstat, on PASE with libo4.so).
+// Returns true if ok, false if error.
+static bool get_meminfo(meminfo_t* pmi);
+// Function to retrieve cpu information on AIX
+// (on AIX, using libperfstat)
+// Returns true if ok, false if error.
+static bool get_cpuinfo(cpuinfo_t* pci);
+}; // os::Aix class
+class PlatformEvent : public CHeapObj<mtInternal> {
+private:
+double CachePad [4];   // increase odds that _mutex is sole occupant of cache line
+volatile int _Event;
+volatile int _nParked;
+pthread_mutex_t _mutex  [1];
+pthread_cond_t  _cond   [1];
+double PostPad  [2];
+Thread * _Assoc;
+public:       // TODO-FIXME: make dtor private
+~PlatformEvent() { guarantee (0, "invariant"); }
+public:
+PlatformEvent() {
+int status;
+status = pthread_cond_init (_cond, NULL);
+assert_status(status == 0, status, "cond_init");
+status = pthread_mutex_init (_mutex, NULL);
+assert_status(status == 0, status, "mutex_init");
+_Event   = 0;
+_nParked = 0;
+_Assoc   = NULL;
+}
+// Use caution with reset() and fired() -- they may require MEMBARs
+void reset() { _Event = 0; }
+int  fired() { return _Event; }
+void park ();
+void unpark ();
+int  TryPark ();
+int  park (jlong millis);
+void SetAssociation (Thread * a) { _Assoc = a; }
+};
+class PlatformParker : public CHeapObj<mtInternal> {
+protected:
+pthread_mutex_t _mutex [1];
+pthread_cond_t  _cond  [1];
+public:       // TODO-FIXME: make dtor private
+~PlatformParker() { guarantee (0, "invariant"); }
+public:
+PlatformParker() {
+int status;
+status = pthread_cond_init (_cond, NULL);
+assert_status(status == 0, status, "cond_init");
+status = pthread_mutex_init (_mutex, NULL);
+assert_status(status == 0, status, "mutex_init");
+}
+};
+#endif // OS_AIX_VM_OS_AIX_HPP

comparison: src/os/aix/vm/os_aix.hpp

src/os/aix/vm/os_aix.hpp

Mercurial > jdk8-mips64-public > hotspot / file comparison

comparison: src/os/aix/vm/os_aix.hpp

src/os/aix/vm/os_aix.hpp