Mercurial > hg > truffle

annotate src/os/posix/vm/os_posix.hpp @ 17795:a9becfeecd1b

Find changesets by keywords (author, files, the commit message), revision number or hash, or revset expression.
Merge
author kvn
date Wed, 22 Jan 2014 17:42:23 -0800
parents 55fb97c4c58d f42f2e2a1518
children 4ca6dc0799b6
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
rev   line source
6080
7432b9db36ff 7165755: OS Information much longer on linux than other platforms
nloodin
parents:
diff changeset
1 /*
17467
55fb97c4c58d 8029233: Update copyright year to match last edit in jdk8 hotspot repository for 2013
mikael
parents: 11151
diff changeset
2 * Copyright (c) 1999, 2013, Oracle and/or its affiliates. All rights reserved.
6080
7432b9db36ff 7165755: OS Information much longer on linux than other platforms
nloodin
parents:
diff changeset
3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
7432b9db36ff 7165755: OS Information much longer on linux than other platforms
nloodin
parents:
diff changeset
4 *
7432b9db36ff 7165755: OS Information much longer on linux than other platforms
nloodin
parents:
diff changeset
5 * This code is free software; you can redistribute it and/or modify it
7432b9db36ff 7165755: OS Information much longer on linux than other platforms
nloodin
parents:
diff changeset
6 * under the terms of the GNU General Public License version 2 only, as
7432b9db36ff 7165755: OS Information much longer on linux than other platforms
nloodin
parents:
diff changeset
7 * published by the Free Software Foundation.
7432b9db36ff 7165755: OS Information much longer on linux than other platforms
nloodin
parents:
diff changeset
8 *
7432b9db36ff 7165755: OS Information much longer on linux than other platforms
nloodin
parents:
diff changeset
9 * This code is distributed in the hope that it will be useful, but WITHOUT
7432b9db36ff 7165755: OS Information much longer on linux than other platforms
nloodin
parents:
diff changeset
10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
7432b9db36ff 7165755: OS Information much longer on linux than other platforms
nloodin
parents:
diff changeset
11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
7432b9db36ff 7165755: OS Information much longer on linux than other platforms
nloodin
parents:
diff changeset
12 * version 2 for more details (a copy is included in the LICENSE file that
7432b9db36ff 7165755: OS Information much longer on linux than other platforms
nloodin
parents:
diff changeset
13 * accompanied this code).
7432b9db36ff 7165755: OS Information much longer on linux than other platforms
nloodin
parents:
diff changeset
14 *
7432b9db36ff 7165755: OS Information much longer on linux than other platforms
nloodin
parents:
diff changeset
15 * You should have received a copy of the GNU General Public License version
7432b9db36ff 7165755: OS Information much longer on linux than other platforms
nloodin
parents:
diff changeset
16 * 2 along with this work; if not, write to the Free Software Foundation,
7432b9db36ff 7165755: OS Information much longer on linux than other platforms
nloodin
parents:
diff changeset
17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
7432b9db36ff 7165755: OS Information much longer on linux than other platforms
nloodin
parents:
diff changeset
18 *
7432b9db36ff 7165755: OS Information much longer on linux than other platforms
nloodin
parents:
diff changeset
19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
7432b9db36ff 7165755: OS Information much longer on linux than other platforms
nloodin
parents:
diff changeset
20 * or visit www.oracle.com if you need additional information or have any
7432b9db36ff 7165755: OS Information much longer on linux than other platforms
nloodin
parents:
diff changeset
21 * questions.
7432b9db36ff 7165755: OS Information much longer on linux than other platforms
nloodin
parents:
diff changeset
22 *
7432b9db36ff 7165755: OS Information much longer on linux than other platforms
nloodin
parents:
diff changeset
23 */
7432b9db36ff 7165755: OS Information much longer on linux than other platforms
nloodin
parents:
diff changeset
24
7432b9db36ff 7165755: OS Information much longer on linux than other platforms
nloodin
parents:
diff changeset
25 #ifndef OS_POSIX_VM_OS_POSIX_HPP
7432b9db36ff 7165755: OS Information much longer on linux than other platforms
nloodin
parents:
diff changeset
26 #define OS_POSIX_VM_OS_POSIX_HPP
7432b9db36ff 7165755: OS Information much longer on linux than other platforms
nloodin
parents:
diff changeset
27 class Posix {
7432b9db36ff 7165755: OS Information much longer on linux than other platforms
nloodin
parents:
diff changeset
28 friend class os;
7432b9db36ff 7165755: OS Information much longer on linux than other platforms
nloodin
parents:
diff changeset
29
7432b9db36ff 7165755: OS Information much longer on linux than other platforms
nloodin
parents:
diff changeset
30 protected:
7432b9db36ff 7165755: OS Information much longer on linux than other platforms
nloodin
parents:
diff changeset
31 static void print_distro_info(outputStream* st);
7432b9db36ff 7165755: OS Information much longer on linux than other platforms
nloodin
parents:
diff changeset
32 static void print_rlimit_info(outputStream* st);
7432b9db36ff 7165755: OS Information much longer on linux than other platforms
nloodin
parents:
diff changeset
33 static void print_uname_info(outputStream* st);
7432b9db36ff 7165755: OS Information much longer on linux than other platforms
nloodin
parents:
diff changeset
34 static void print_libversion_info(outputStream* st);
7432b9db36ff 7165755: OS Information much longer on linux than other platforms
nloodin
parents:
diff changeset
35 static void print_load_average(outputStream* st);
7432b9db36ff 7165755: OS Information much longer on linux than other platforms
nloodin
parents:
diff changeset
36
14410
f42f2e2a1518 8020775: PPC64 (part 12): posix signal printing
goetz
parents: 11151
diff changeset
37 public:
f42f2e2a1518 8020775: PPC64 (part 12): posix signal printing
goetz
parents: 11151
diff changeset
38
f42f2e2a1518 8020775: PPC64 (part 12): posix signal printing
goetz
parents: 11151
diff changeset
39 // Returns true if signal is valid.
f42f2e2a1518 8020775: PPC64 (part 12): posix signal printing
goetz
parents: 11151
diff changeset
40 static bool is_valid_signal(int sig);
f42f2e2a1518 8020775: PPC64 (part 12): posix signal printing
goetz
parents: 11151
diff changeset
41
f42f2e2a1518 8020775: PPC64 (part 12): posix signal printing
goetz
parents: 11151
diff changeset
42 // Helper function, returns a string (e.g. "SIGILL") for a signal.
f42f2e2a1518 8020775: PPC64 (part 12): posix signal printing
goetz
parents: 11151
diff changeset
43 // Returned string is a constant. For unknown signals "UNKNOWN" is returned.
f42f2e2a1518 8020775: PPC64 (part 12): posix signal printing
goetz
parents: 11151
diff changeset
44 static const char* get_signal_name(int sig, char* out, size_t outlen);
f42f2e2a1518 8020775: PPC64 (part 12): posix signal printing
goetz
parents: 11151
diff changeset
45
f42f2e2a1518 8020775: PPC64 (part 12): posix signal printing
goetz
parents: 11151
diff changeset
46 // Returns one-line short description of a signal set in a user provided buffer.
f42f2e2a1518 8020775: PPC64 (part 12): posix signal printing
goetz
parents: 11151
diff changeset
47 static const char* describe_signal_set_short(const sigset_t* set, char* buffer, size_t size);
f42f2e2a1518 8020775: PPC64 (part 12): posix signal printing
goetz
parents: 11151
diff changeset
48
f42f2e2a1518 8020775: PPC64 (part 12): posix signal printing
goetz
parents: 11151
diff changeset
49 // Prints a short one-line description of a signal set.
f42f2e2a1518 8020775: PPC64 (part 12): posix signal printing
goetz
parents: 11151
diff changeset
50 static void print_signal_set_short(outputStream* st, const sigset_t* set);
f42f2e2a1518 8020775: PPC64 (part 12): posix signal printing
goetz
parents: 11151
diff changeset
51
f42f2e2a1518 8020775: PPC64 (part 12): posix signal printing
goetz
parents: 11151
diff changeset
52 // Writes a one-line description of a combination of sigaction.sa_flags
f42f2e2a1518 8020775: PPC64 (part 12): posix signal printing
goetz
parents: 11151
diff changeset
53 // into a user provided buffer. Returns that buffer.
f42f2e2a1518 8020775: PPC64 (part 12): posix signal printing
goetz
parents: 11151
diff changeset
54 static const char* describe_sa_flags(int flags, char* buffer, size_t size);
f42f2e2a1518 8020775: PPC64 (part 12): posix signal printing
goetz
parents: 11151
diff changeset
55
f42f2e2a1518 8020775: PPC64 (part 12): posix signal printing
goetz
parents: 11151
diff changeset
56 // Prints a one-line description of a combination of sigaction.sa_flags.
f42f2e2a1518 8020775: PPC64 (part 12): posix signal printing
goetz
parents: 11151
diff changeset
57 static void print_sa_flags(outputStream* st, int flags);
f42f2e2a1518 8020775: PPC64 (part 12): posix signal printing
goetz
parents: 11151
diff changeset
58
f42f2e2a1518 8020775: PPC64 (part 12): posix signal printing
goetz
parents: 11151
diff changeset
59 // A POSIX conform, platform-independend siginfo print routine.
f42f2e2a1518 8020775: PPC64 (part 12): posix signal printing
goetz
parents: 11151
diff changeset
60 static void print_siginfo_brief(outputStream* os, const siginfo_t* si);
6080
7432b9db36ff 7165755: OS Information much longer on linux than other platforms
nloodin
parents:
diff changeset
61
7432b9db36ff 7165755: OS Information much longer on linux than other platforms
nloodin
parents:
diff changeset
62 };
7432b9db36ff 7165755: OS Information much longer on linux than other platforms
nloodin
parents:
diff changeset
63
11151
5e3b6f79d280 8020701: Avoid crashes in WatcherThread
rbackman
parents: 6842
diff changeset
64 /*
5e3b6f79d280 8020701: Avoid crashes in WatcherThread
rbackman
parents: 6842
diff changeset
65 * Crash protection for the watcher thread. Wrap the callback
5e3b6f79d280 8020701: Avoid crashes in WatcherThread
rbackman
parents: 6842
diff changeset
66 * with a sigsetjmp and in case of a SIGSEGV/SIGBUS we siglongjmp
5e3b6f79d280 8020701: Avoid crashes in WatcherThread
rbackman
parents: 6842
diff changeset
67 * back.
5e3b6f79d280 8020701: Avoid crashes in WatcherThread
rbackman
parents: 6842
diff changeset
68 * To be able to use this - don't take locks, don't rely on destructors,
5e3b6f79d280 8020701: Avoid crashes in WatcherThread
rbackman
parents: 6842
diff changeset
69 * don't make OS library calls, don't allocate memory, don't print,
5e3b6f79d280 8020701: Avoid crashes in WatcherThread
rbackman
parents: 6842
diff changeset
70 * don't call code that could leave the heap / memory in an inconsistent state,
5e3b6f79d280 8020701: Avoid crashes in WatcherThread
rbackman
parents: 6842
diff changeset
71 * or anything else where we are not in control if we suddenly jump out.
5e3b6f79d280 8020701: Avoid crashes in WatcherThread
rbackman
parents: 6842
diff changeset
72 */
5e3b6f79d280 8020701: Avoid crashes in WatcherThread
rbackman
parents: 6842
diff changeset
73 class WatcherThreadCrashProtection : public StackObj {
5e3b6f79d280 8020701: Avoid crashes in WatcherThread
rbackman
parents: 6842
diff changeset
74 public:
5e3b6f79d280 8020701: Avoid crashes in WatcherThread
rbackman
parents: 6842
diff changeset
75 WatcherThreadCrashProtection();
5e3b6f79d280 8020701: Avoid crashes in WatcherThread
rbackman
parents: 6842
diff changeset
76 bool call(os::CrashProtectionCallback& cb);
5e3b6f79d280 8020701: Avoid crashes in WatcherThread
rbackman
parents: 6842
diff changeset
77
5e3b6f79d280 8020701: Avoid crashes in WatcherThread
rbackman
parents: 6842
diff changeset
78 static void check_crash_protection(int signal, Thread* thread);
5e3b6f79d280 8020701: Avoid crashes in WatcherThread
rbackman
parents: 6842
diff changeset
79 private:
5e3b6f79d280 8020701: Avoid crashes in WatcherThread
rbackman
parents: 6842
diff changeset
80 void restore();
5e3b6f79d280 8020701: Avoid crashes in WatcherThread
rbackman
parents: 6842
diff changeset
81 sigjmp_buf _jmpbuf;
5e3b6f79d280 8020701: Avoid crashes in WatcherThread
rbackman
parents: 6842
diff changeset
82 };
6080
7432b9db36ff 7165755: OS Information much longer on linux than other platforms
nloodin
parents:
diff changeset
83
14410
f42f2e2a1518 8020775: PPC64 (part 12): posix signal printing
goetz
parents: 11151
diff changeset
84 #endif // OS_POSIX_VM_OS_POSIX_HPP