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hotspot/src/os/linux/vm/os_linux.hpp

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   1 /*
   2  * Copyright (c) 1999, 2015, Oracle and/or its affiliates. All rights reserved.
   3  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
   4  *
   5  * This code is free software; you can redistribute it and/or modify it
   6  * under the terms of the GNU General Public License version 2 only, as
   7  * published by the Free Software Foundation.
   8  *
   9  * This code is distributed in the hope that it will be useful, but WITHOUT
  10  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  11  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  12  * version 2 for more details (a copy is included in the LICENSE file that
  13  * accompanied this code).
  14  *
  15  * You should have received a copy of the GNU General Public License version
  16  * 2 along with this work; if not, write to the Free Software Foundation,
  17  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
  18  *
  19  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
  20  * or visit www.oracle.com if you need additional information or have any
  21  * questions.
  22  *


 153   static void signal_sets_init();
 154   static void install_signal_handlers();
 155   static void set_signal_handler(int, bool);
 156   static bool is_sig_ignored(int sig);
 157 
 158   static sigset_t* unblocked_signals();
 159   static sigset_t* vm_signals();
 160   static sigset_t* allowdebug_blocked_signals();
 161 
 162   // For signal-chaining
 163   static struct sigaction *get_chained_signal_action(int sig);
 164   static bool chained_handler(int sig, siginfo_t* siginfo, void* context);
 165 
 166   // GNU libc and libpthread version strings
 167   static const char *glibc_version()          { return _glibc_version; }
 168   static const char *libpthread_version()     { return _libpthread_version; }
 169 
 170   static void libpthread_init();
 171   static bool libnuma_init();
 172   static void* libnuma_dlsym(void* handle, const char* name);
 173   // Minimum stack size a thread can be created with (allowing
 174   // the VM to completely create the thread and enter user code)
 175   static size_t min_stack_allowed;
 176 
 177   // Return default stack size or guard size for the specified thread type
 178   static size_t default_stack_size(os::ThreadType thr_type);
 179   static size_t default_guard_size(os::ThreadType thr_type);
 180 
 181   static void capture_initial_stack(size_t max_size);
 182 
 183   // Stack overflow handling
 184   static bool manually_expand_stack(JavaThread * t, address addr);
 185   static int max_register_window_saves_before_flushing();
 186 
 187   // Real-time clock functions
 188   static void clock_init(void);
 189 
 190   // fast POSIX clocks support
 191   static void fast_thread_clock_init(void);
 192 
 193   static int clock_gettime(clockid_t clock_id, struct timespec *tp) {
 194     return _clock_gettime ? _clock_gettime(clock_id, tp) : -1;
 195   }
 196 
 197   static int pthread_getcpuclockid(pthread_t tid, clockid_t *clock_id) {
 198     return _pthread_getcpuclockid ? _pthread_getcpuclockid(tid, clock_id) : -1;


   1 /*
   2  * Copyright (c) 1999, 2016, Oracle and/or its affiliates. All rights reserved.
   3  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
   4  *
   5  * This code is free software; you can redistribute it and/or modify it
   6  * under the terms of the GNU General Public License version 2 only, as
   7  * published by the Free Software Foundation.
   8  *
   9  * This code is distributed in the hope that it will be useful, but WITHOUT
  10  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  11  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  12  * version 2 for more details (a copy is included in the LICENSE file that
  13  * accompanied this code).
  14  *
  15  * You should have received a copy of the GNU General Public License version
  16  * 2 along with this work; if not, write to the Free Software Foundation,
  17  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
  18  *
  19  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
  20  * or visit www.oracle.com if you need additional information or have any
  21  * questions.
  22  *


 153   static void signal_sets_init();
 154   static void install_signal_handlers();
 155   static void set_signal_handler(int, bool);
 156   static bool is_sig_ignored(int sig);
 157 
 158   static sigset_t* unblocked_signals();
 159   static sigset_t* vm_signals();
 160   static sigset_t* allowdebug_blocked_signals();
 161 
 162   // For signal-chaining
 163   static struct sigaction *get_chained_signal_action(int sig);
 164   static bool chained_handler(int sig, siginfo_t* siginfo, void* context);
 165 
 166   // GNU libc and libpthread version strings
 167   static const char *glibc_version()          { return _glibc_version; }
 168   static const char *libpthread_version()     { return _libpthread_version; }
 169 
 170   static void libpthread_init();
 171   static bool libnuma_init();
 172   static void* libnuma_dlsym(void* handle, const char* name);



 173 
 174   // Return default guard size for the specified thread type

 175   static size_t default_guard_size(os::ThreadType thr_type);
 176 
 177   static void capture_initial_stack(size_t max_size);
 178 
 179   // Stack overflow handling
 180   static bool manually_expand_stack(JavaThread * t, address addr);
 181   static int max_register_window_saves_before_flushing();
 182 
 183   // Real-time clock functions
 184   static void clock_init(void);
 185 
 186   // fast POSIX clocks support
 187   static void fast_thread_clock_init(void);
 188 
 189   static int clock_gettime(clockid_t clock_id, struct timespec *tp) {
 190     return _clock_gettime ? _clock_gettime(clock_id, tp) : -1;
 191   }
 192 
 193   static int pthread_getcpuclockid(pthread_t tid, clockid_t *clock_id) {
 194     return _pthread_getcpuclockid ? _pthread_getcpuclockid(tid, clock_id) : -1;


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