Mercurial > hg > truffle
view src/os/posix/vm/os_posix.hpp @ 20813:eb21f2944d7d
Process Graal oops in nmethod::do_unloading_parallel
author | Gilles Duboscq <gilles.m.duboscq@oracle.com> |
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date | Wed, 08 Apr 2015 15:33:13 +0200 |
parents | 52b4284cb496 |
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/* * 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