--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/src/hotspot/os/aix/os_aix.hpp Tue Sep 12 19:03:39 2017 +0200
@@ -0,0 +1,225 @@
+/*
+ * 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