author | coleenp |
Fri, 18 May 2018 08:47:42 -0400 | |
changeset 50177 | 9806f23d5e5e |
parent 48005 | 9fd89aabb6cd |
child 53244 | 9807daeb47c4 |
permissions | -rw-r--r-- |
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/* |
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* Copyright (c) 1999, 2018, Oracle and/or its affiliates. All rights reserved. |
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* Copyright (c) 2013, 2016 SAP SE. All rights reserved. |
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* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
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* |
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* This code is free software; you can redistribute it and/or modify it |
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* under the terms of the GNU General Public License version 2 only, as |
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* published by the Free Software Foundation. |
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* |
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* This code is distributed in the hope that it will be useful, but WITHOUT |
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
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* version 2 for more details (a copy is included in the LICENSE file that |
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* accompanied this code). |
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* |
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* You should have received a copy of the GNU General Public License version |
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* 2 along with this work; if not, write to the Free Software Foundation, |
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* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
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* |
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* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
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* or visit www.oracle.com if you need additional information or have any |
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* questions. |
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* |
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*/ |
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|
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#ifndef OS_AIX_VM_OS_AIX_HPP |
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#define OS_AIX_VM_OS_AIX_HPP |
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// Information about the protection of the page at address '0' on this os. |
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static bool zero_page_read_protected() { return false; } |
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// Class Aix defines the interface to the Aix operating systems. |
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class Aix { |
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friend class os; |
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static bool libjsig_is_loaded; // libjsig that interposes sigaction(), |
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// __sigaction(), signal() is loaded |
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static struct sigaction *(*get_signal_action)(int); |
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static struct sigaction *get_preinstalled_handler(int); |
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static void save_preinstalled_handler(int, struct sigaction&); |
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static void check_signal_handler(int sig); |
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private: |
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static julong _physical_memory; |
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static pthread_t _main_thread; |
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static Mutex* _createThread_lock; |
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static int _page_size; |
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// -1 = uninitialized, 0 = AIX, 1 = OS/400 (PASE) |
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static int _on_pase; |
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// 0 = uninitialized, otherwise 16 bit number: |
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// lower 8 bit - minor version |
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// higher 8 bit - major version |
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// For AIX, e.g. 0x0601 for AIX 6.1 |
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// for OS/400 e.g. 0x0504 for OS/400 V5R4 |
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static uint32_t _os_version; |
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// -1 = uninitialized, |
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// 0 - SPEC1170 not requested (XPG_SUS_ENV is OFF or not set) |
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// 1 - SPEC1170 requested (XPG_SUS_ENV is ON) |
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static int _xpg_sus_mode; |
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// -1 = uninitialized, |
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// 0 - EXTSHM=OFF or not set |
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// 1 - EXTSHM=ON |
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static int _extshm; |
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static julong available_memory(); |
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static julong physical_memory() { return _physical_memory; } |
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static void initialize_system_info(); |
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// OS recognitions (PASE/AIX, OS level) call this before calling any |
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// one of Aix::on_pase(), Aix::os_version(). |
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static void initialize_os_info(); |
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// Scan environment for important settings which might effect the |
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// VM. Trace out settings. Warn about invalid settings and/or |
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// correct them. |
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// |
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// Must run after os::Aix::initialue_os_info(). |
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static void scan_environment(); |
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// Initialize libo4 (on PASE) and libperfstat (on AIX). Call this |
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// before relying on functions from either lib, e.g. Aix::get_meminfo(). |
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static void initialize_libo4(); |
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static void initialize_libperfstat(); |
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public: |
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static void init_thread_fpu_state(); |
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static pthread_t main_thread(void) { return _main_thread; } |
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static void set_createThread_lock(Mutex* lk) { _createThread_lock = lk; } |
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static Mutex* createThread_lock(void) { return _createThread_lock; } |
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static void hotspot_sigmask(Thread* thread); |
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// Given an address, returns the size of the page backing that address |
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static size_t query_pagesize(void* p); |
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static int page_size(void) { |
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assert(_page_size != -1, "not initialized"); |
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return _page_size; |
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} |
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static address ucontext_get_pc(const ucontext_t* uc); |
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static intptr_t* ucontext_get_sp(const ucontext_t* uc); |
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static intptr_t* ucontext_get_fp(const ucontext_t* uc); |
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// Set PC into context. Needed for continuation after signal. |
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static void ucontext_set_pc(ucontext_t* uc, address pc); |
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static bool get_frame_at_stack_banging_point(JavaThread* thread, ucontext_t* uc, frame* fr); |
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// This boolean allows users to forward their own non-matching signals |
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// to JVM_handle_aix_signal, harmlessly. |
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static bool signal_handlers_are_installed; |
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static int get_our_sigflags(int); |
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static void set_our_sigflags(int, int); |
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static void signal_sets_init(); |
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static void install_signal_handlers(); |
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static void set_signal_handler(int, bool); |
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|
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static sigset_t* unblocked_signals(); |
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static sigset_t* vm_signals(); |
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|
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// For signal-chaining |
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static struct sigaction *get_chained_signal_action(int sig); |
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static bool chained_handler(int sig, siginfo_t* siginfo, void* context); |
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|
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// libpthread version string |
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static void libpthread_init(); |
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|
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// Function returns true if we run on OS/400 (pase), false if we run |
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// on AIX. |
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static bool on_pase() { |
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assert(_on_pase != -1, "not initialized"); |
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return _on_pase ? true : false; |
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} |
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|
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// Function returns true if we run on AIX, false if we run on OS/400 |
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// (pase). |
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static bool on_aix() { |
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assert(_on_pase != -1, "not initialized"); |
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return _on_pase ? false : true; |
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} |
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// Get 4 byte AIX kernel version number: |
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// highest 2 bytes: Version, Release |
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// if available: lowest 2 bytes: Tech Level, Service Pack. |
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static uint32_t os_version() { |
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assert(_os_version != 0, "not initialized"); |
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return _os_version; |
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} |
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|
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// 0 = uninitialized, otherwise 16 bit number: |
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// lower 8 bit - minor version |
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// higher 8 bit - major version |
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// For AIX, e.g. 0x0601 for AIX 6.1 |
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// for OS/400 e.g. 0x0504 for OS/400 V5R4 |
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static int os_version_short() { |
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return os_version() >> 16; |
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} |
165 |
||
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// Convenience method: returns true if running on PASE V5R4 or older. |
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static bool on_pase_V5R4_or_older() { |
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return on_pase() && os_version_short() <= 0x0504; |
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} |
170 |
||
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// Convenience method: returns true if running on AIX 5.3 or older. |
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static bool on_aix_53_or_older() { |
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return on_aix() && os_version_short() <= 0x0503; |
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} |
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|
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// Returns true if we run in SPEC1170 compliant mode (XPG_SUS_ENV=ON). |
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static bool xpg_sus_mode() { |
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assert(_xpg_sus_mode != -1, "not initialized"); |
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return _xpg_sus_mode; |
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} |
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|
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// Returns true if EXTSHM=ON. |
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static bool extshm() { |
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assert(_extshm != -1, "not initialized"); |
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return _extshm; |
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} |
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|
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// result struct for get_meminfo() |
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struct meminfo_t { |
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|
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// Amount of virtual memory (in units of 4 KB pages) |
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unsigned long long virt_total; |
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|
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// Amount of real memory, in bytes |
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unsigned long long real_total; |
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|
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// Amount of free real memory, in bytes |
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unsigned long long real_free; |
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|
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// Total amount of paging space, in bytes |
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unsigned long long pgsp_total; |
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|
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// Amount of free paging space, in bytes |
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unsigned long long pgsp_free; |
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|
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}; |
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|
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// Functions to retrieve memory information on AIX, PASE. |
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// (on AIX, using libperfstat, on PASE with libo4.so). |
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// Returns true if ok, false if error. |
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static bool get_meminfo(meminfo_t* pmi); |
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|
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}; |
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|
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#endif // OS_AIX_VM_OS_AIX_HPP |