| /* |
| * Copyright (c) 1999, 2013, Oracle and/or its affiliates. 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_POSIX_VM_OS_POSIX_HPP |
| #define OS_POSIX_VM_OS_POSIX_HPP |
| class Posix { |
| friend class os; |
| |
| protected: |
| static void print_distro_info(outputStream* st); |
| static void print_rlimit_info(outputStream* st); |
| static void print_uname_info(outputStream* st); |
| static void print_libversion_info(outputStream* st); |
| static void print_load_average(outputStream* st); |
| |
| public: |
| |
| // Returns true if signal is valid. |
| static bool is_valid_signal(int sig); |
| |
| // Helper function, returns a string (e.g. "SIGILL") for a signal. |
| // Returned string is a constant. For unknown signals "UNKNOWN" is returned. |
| static const char* get_signal_name(int sig, char* out, size_t outlen); |
| |
| // Returns one-line short description of a signal set in a user provided buffer. |
| static const char* describe_signal_set_short(const sigset_t* set, char* buffer, size_t size); |
| |
| // Prints a short one-line description of a signal set. |
| static void print_signal_set_short(outputStream* st, const sigset_t* set); |
| |
| // Writes a one-line description of a combination of sigaction.sa_flags |
| // into a user provided buffer. Returns that buffer. |
| static const char* describe_sa_flags(int flags, char* buffer, size_t size); |
| |
| // Prints a one-line description of a combination of sigaction.sa_flags. |
| static void print_sa_flags(outputStream* st, int flags); |
| |
| // A POSIX conform, platform-independend siginfo print routine. |
| static void print_siginfo_brief(outputStream* os, const siginfo_t* si); |
| |
| }; |
| |
| /* |
| * Crash protection for the watcher thread. Wrap the callback |
| * with a sigsetjmp and in case of a SIGSEGV/SIGBUS we siglongjmp |
| * back. |
| * To be able to use this - don't take locks, don't rely on destructors, |
| * don't make OS library calls, don't allocate memory, don't print, |
| * don't call code that could leave the heap / memory in an inconsistent state, |
| * or anything else where we are not in control if we suddenly jump out. |
| */ |
| class WatcherThreadCrashProtection : public StackObj { |
| public: |
| WatcherThreadCrashProtection(); |
| bool call(os::CrashProtectionCallback& cb); |
| |
| static void check_crash_protection(int signal, Thread* thread); |
| private: |
| void restore(); |
| sigjmp_buf _jmpbuf; |
| }; |
| |
| #endif // OS_POSIX_VM_OS_POSIX_HPP |