Mercurial > jdk8-mips64-public > hotspot / annotate
src/os/posix/vm/os_posix.hpp@f90c822e73f8 (annotated)
src/os/posix/vm/os_posix.hpp
Wed, 27 Apr 2016 01:25:04 +0800
- author
- aoqi
- date
- Wed, 27 Apr 2016 01:25:04 +0800
- changeset 0
- f90c822e73f8
- child 6876
- 710a3c8b516e
- permissions
- -rw-r--r--
Initial load
http://hg.openjdk.java.net/jdk8u/jdk8u/hotspot/
changeset: 6782:28b50d07f6f8
tag: jdk8u25-b17
| aoqi@0 | 1 | /* |
| aoqi@0 | 2 | * Copyright (c) 1999, 2013, Oracle and/or its affiliates. All rights reserved. |
| aoqi@0 | 3 | * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
| aoqi@0 | 4 | * |
| aoqi@0 | 5 | * This code is free software; you can redistribute it and/or modify it |
| aoqi@0 | 6 | * under the terms of the GNU General Public License version 2 only, as |
| aoqi@0 | 7 | * published by the Free Software Foundation. |
| aoqi@0 | 8 | * |
| aoqi@0 | 9 | * This code is distributed in the hope that it will be useful, but WITHOUT |
| aoqi@0 | 10 | * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
| aoqi@0 | 11 | * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
| aoqi@0 | 12 | * version 2 for more details (a copy is included in the LICENSE file that |
| aoqi@0 | 13 | * accompanied this code). |
| aoqi@0 | 14 | * |
| aoqi@0 | 15 | * You should have received a copy of the GNU General Public License version |
| aoqi@0 | 16 | * 2 along with this work; if not, write to the Free Software Foundation, |
| aoqi@0 | 17 | * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
| aoqi@0 | 18 | * |
| aoqi@0 | 19 | * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
| aoqi@0 | 20 | * or visit www.oracle.com if you need additional information or have any |
| aoqi@0 | 21 | * questions. |
| aoqi@0 | 22 | * |
| aoqi@0 | 23 | */ |
| aoqi@0 | 24 | |
| aoqi@0 | 25 | #ifndef OS_POSIX_VM_OS_POSIX_HPP |
| aoqi@0 | 26 | #define OS_POSIX_VM_OS_POSIX_HPP |
| aoqi@0 | 27 | class Posix { |
| aoqi@0 | 28 | friend class os; |
| aoqi@0 | 29 | |
| aoqi@0 | 30 | protected: |
| aoqi@0 | 31 | static void print_distro_info(outputStream* st); |
| aoqi@0 | 32 | static void print_rlimit_info(outputStream* st); |
| aoqi@0 | 33 | static void print_uname_info(outputStream* st); |
| aoqi@0 | 34 | static void print_libversion_info(outputStream* st); |
| aoqi@0 | 35 | static void print_load_average(outputStream* st); |
| aoqi@0 | 36 | |
| aoqi@0 | 37 | public: |
| aoqi@0 | 38 | |
| aoqi@0 | 39 | // Returns true if signal is valid. |
| aoqi@0 | 40 | static bool is_valid_signal(int sig); |
| aoqi@0 | 41 | |
| aoqi@0 | 42 | // Helper function, returns a string (e.g. "SIGILL") for a signal. |
| aoqi@0 | 43 | // Returned string is a constant. For unknown signals "UNKNOWN" is returned. |
| aoqi@0 | 44 | static const char* get_signal_name(int sig, char* out, size_t outlen); |
| aoqi@0 | 45 | |
| aoqi@0 | 46 | // Returns one-line short description of a signal set in a user provided buffer. |
| aoqi@0 | 47 | static const char* describe_signal_set_short(const sigset_t* set, char* buffer, size_t size); |
| aoqi@0 | 48 | |
| aoqi@0 | 49 | // Prints a short one-line description of a signal set. |
| aoqi@0 | 50 | static void print_signal_set_short(outputStream* st, const sigset_t* set); |
| aoqi@0 | 51 | |
| aoqi@0 | 52 | // Writes a one-line description of a combination of sigaction.sa_flags |
| aoqi@0 | 53 | // into a user provided buffer. Returns that buffer. |
| aoqi@0 | 54 | static const char* describe_sa_flags(int flags, char* buffer, size_t size); |
| aoqi@0 | 55 | |
| aoqi@0 | 56 | // Prints a one-line description of a combination of sigaction.sa_flags. |
| aoqi@0 | 57 | static void print_sa_flags(outputStream* st, int flags); |
| aoqi@0 | 58 | |
| aoqi@0 | 59 | // A POSIX conform, platform-independend siginfo print routine. |
| aoqi@0 | 60 | static void print_siginfo_brief(outputStream* os, const siginfo_t* si); |
| aoqi@0 | 61 | |
| aoqi@0 | 62 | }; |
| aoqi@0 | 63 | |
| aoqi@0 | 64 | /* |
| aoqi@0 | 65 | * Crash protection for the watcher thread. Wrap the callback |
| aoqi@0 | 66 | * with a sigsetjmp and in case of a SIGSEGV/SIGBUS we siglongjmp |
| aoqi@0 | 67 | * back. |
| aoqi@0 | 68 | * To be able to use this - don't take locks, don't rely on destructors, |
| aoqi@0 | 69 | * don't make OS library calls, don't allocate memory, don't print, |
| aoqi@0 | 70 | * don't call code that could leave the heap / memory in an inconsistent state, |
| aoqi@0 | 71 | * or anything else where we are not in control if we suddenly jump out. |
| aoqi@0 | 72 | */ |
| aoqi@0 | 73 | class WatcherThreadCrashProtection : public StackObj { |
| aoqi@0 | 74 | public: |
| aoqi@0 | 75 | WatcherThreadCrashProtection(); |
| aoqi@0 | 76 | bool call(os::CrashProtectionCallback& cb); |
| aoqi@0 | 77 | |
| aoqi@0 | 78 | static void check_crash_protection(int signal, Thread* thread); |
| aoqi@0 | 79 | private: |
| aoqi@0 | 80 | void restore(); |
| aoqi@0 | 81 | sigjmp_buf _jmpbuf; |
| aoqi@0 | 82 | }; |
| aoqi@0 | 83 | |
| aoqi@0 | 84 | #endif // OS_POSIX_VM_OS_POSIX_HPP |
