| /* |
| * 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(const 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 |