| /* |
| * Copyright (c) 1999, 2017, Oracle and/or its affiliates. All rights reserved. |
| * Copyright (c) 2013, 2016 SAP SE. 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; |
| |
| 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); |
| |
| private: |
| |
| static julong _physical_memory; |
| static pthread_t _main_thread; |
| static Mutex* _createThread_lock; |
| static int _page_size; |
| |
| // -1 = uninitialized, 0 = AIX, 1 = OS/400 (PASE) |
| static int _on_pase; |
| |
| // 0 = 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 uint32_t _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; |
| |
| 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(); |
| |
| // 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(); |
| |
| // 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(); |
| |
| public: |
| static void init_thread_fpu_state(); |
| static pthread_t main_thread(void) { return _main_thread; } |
| 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; |
| } |
| |
| static address ucontext_get_pc(const ucontext_t* uc); |
| static intptr_t* ucontext_get_sp(const ucontext_t* uc); |
| static intptr_t* ucontext_get_fp(const ucontext_t* uc); |
| // Set PC into context. Needed for continuation after signal. |
| static void ucontext_set_pc(ucontext_t* uc, address pc); |
| |
| static bool get_frame_at_stack_banging_point(JavaThread* thread, ucontext_t* uc, frame* fr); |
| |
| // 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(); |
| |
| // 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(); |
| |
| // Return default libc guard size for the specified thread 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; |
| } |
| |
| // Get 4 byte AIX kernel version number: |
| // highest 2 bytes: Version, Release |
| // if available: lowest 2 bytes: Tech Level, Service Pack. |
| static uint32_t os_version() { |
| assert(_os_version != 0, "not initialized"); |
| return _os_version; |
| } |
| |
| // 0 = 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_short() { |
| return os_version() >> 16; |
| } |
| |
| // Convenience method: returns true if running on PASE V5R4 or older. |
| static bool on_pase_V5R4_or_older() { |
| return on_pase() && os_version_short() <= 0x0504; |
| } |
| |
| // Convenience method: returns true if running on AIX 5.3 or older. |
| static bool on_aix_53_or_older() { |
| return on_aix() && os_version_short() <= 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; |
| |
| }; |
| |
| // 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); |
| |
| }; |
| |
| #endif // OS_AIX_VM_OS_AIX_HPP |