Mercurial > jdk8-mips64-public > hotspot / annotate
src/os/bsd/vm/vmError_bsd.cpp@3e265ce4d2dd (annotated)
src/os/bsd/vm/vmError_bsd.cpp
Sat, 12 Oct 2013 13:09:18 -0400
- author
- hseigel
- date
- Sat, 12 Oct 2013 13:09:18 -0400
- changeset 5895
- 3e265ce4d2dd
- parent 0
- f90c822e73f8
- permissions
- -rw-r--r--
8025942: os::Bsd::available_memory() needs implementation
Summary: Implement using the host_statistics64() api.
Reviewed-by: dsamersoff, morris, dholmes, coleenp, hseigel, dcubed
Contributed-by: gerard.ziemski@oracle.com
| aoqi@0 | 1 | /* |
| aoqi@0 | 2 | * Copyright (c) 2003, 2010, 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 | #include "precompiled.hpp" |
| aoqi@0 | 26 | #include "runtime/arguments.hpp" |
| aoqi@0 | 27 | #include "runtime/os.hpp" |
| aoqi@0 | 28 | #include "runtime/thread.hpp" |
| aoqi@0 | 29 | #include "utilities/vmError.hpp" |
| aoqi@0 | 30 | |
| aoqi@0 | 31 | #include <sys/types.h> |
| aoqi@0 | 32 | #include <sys/wait.h> |
| aoqi@0 | 33 | #include <sys/syscall.h> |
| aoqi@0 | 34 | #include <unistd.h> |
| aoqi@0 | 35 | #include <signal.h> |
| aoqi@0 | 36 | |
| aoqi@0 | 37 | void VMError::show_message_box(char *buf, int buflen) { |
| aoqi@0 | 38 | bool yes; |
| aoqi@0 | 39 | do { |
| aoqi@0 | 40 | error_string(buf, buflen); |
| aoqi@0 | 41 | int len = (int)strlen(buf); |
| aoqi@0 | 42 | char *p = &buf[len]; |
| aoqi@0 | 43 | |
| aoqi@0 | 44 | jio_snprintf(p, buflen - len, |
| aoqi@0 | 45 | "\n\n" |
| aoqi@0 | 46 | "Do you want to debug the problem?\n\n" |
| aoqi@0 | 47 | "To debug, run 'gdb /proc/%d/exe %d'; then switch to thread " INTX_FORMAT " (" INTPTR_FORMAT ")\n" |
| aoqi@0 | 48 | "Enter 'yes' to launch gdb automatically (PATH must include gdb)\n" |
| aoqi@0 | 49 | "Otherwise, press RETURN to abort...", |
| aoqi@0 | 50 | os::current_process_id(), os::current_process_id(), |
| aoqi@0 | 51 | os::current_thread_id(), os::current_thread_id()); |
| aoqi@0 | 52 | |
| aoqi@0 | 53 | yes = os::message_box("Unexpected Error", buf); |
| aoqi@0 | 54 | |
| aoqi@0 | 55 | if (yes) { |
| aoqi@0 | 56 | // yes, user asked VM to launch debugger |
| aoqi@0 | 57 | jio_snprintf(buf, buflen, "gdb /proc/%d/exe %d", |
| aoqi@0 | 58 | os::current_process_id(), os::current_process_id()); |
| aoqi@0 | 59 | |
| aoqi@0 | 60 | os::fork_and_exec(buf); |
| aoqi@0 | 61 | yes = false; |
| aoqi@0 | 62 | } |
| aoqi@0 | 63 | } while (yes); |
| aoqi@0 | 64 | } |
| aoqi@0 | 65 | |
| aoqi@0 | 66 | // Space for our "saved" signal flags and handlers |
| aoqi@0 | 67 | static int resettedSigflags[2]; |
| aoqi@0 | 68 | static address resettedSighandler[2]; |
| aoqi@0 | 69 | |
| aoqi@0 | 70 | static void save_signal(int idx, int sig) |
| aoqi@0 | 71 | { |
| aoqi@0 | 72 | struct sigaction sa; |
| aoqi@0 | 73 | sigaction(sig, NULL, &sa); |
| aoqi@0 | 74 | resettedSigflags[idx] = sa.sa_flags; |
| aoqi@0 | 75 | resettedSighandler[idx] = (sa.sa_flags & SA_SIGINFO) |
| aoqi@0 | 76 | ? CAST_FROM_FN_PTR(address, sa.sa_sigaction) |
| aoqi@0 | 77 | : CAST_FROM_FN_PTR(address, sa.sa_handler); |
| aoqi@0 | 78 | } |
| aoqi@0 | 79 | |
| aoqi@0 | 80 | int VMError::get_resetted_sigflags(int sig) { |
| aoqi@0 | 81 | if(SIGSEGV == sig) { |
| aoqi@0 | 82 | return resettedSigflags[0]; |
| aoqi@0 | 83 | } else if(SIGBUS == sig) { |
| aoqi@0 | 84 | return resettedSigflags[1]; |
| aoqi@0 | 85 | } |
| aoqi@0 | 86 | return -1; |
| aoqi@0 | 87 | } |
| aoqi@0 | 88 | |
| aoqi@0 | 89 | address VMError::get_resetted_sighandler(int sig) { |
| aoqi@0 | 90 | if(SIGSEGV == sig) { |
| aoqi@0 | 91 | return resettedSighandler[0]; |
| aoqi@0 | 92 | } else if(SIGBUS == sig) { |
| aoqi@0 | 93 | return resettedSighandler[1]; |
| aoqi@0 | 94 | } |
| aoqi@0 | 95 | return NULL; |
| aoqi@0 | 96 | } |
| aoqi@0 | 97 | |
| aoqi@0 | 98 | static void crash_handler(int sig, siginfo_t* info, void* ucVoid) { |
| aoqi@0 | 99 | // unmask current signal |
| aoqi@0 | 100 | sigset_t newset; |
| aoqi@0 | 101 | sigemptyset(&newset); |
| aoqi@0 | 102 | sigaddset(&newset, sig); |
| aoqi@0 | 103 | sigprocmask(SIG_UNBLOCK, &newset, NULL); |
| aoqi@0 | 104 | |
| aoqi@0 | 105 | VMError err(NULL, sig, NULL, info, ucVoid); |
| aoqi@0 | 106 | err.report_and_die(); |
| aoqi@0 | 107 | } |
| aoqi@0 | 108 | |
| aoqi@0 | 109 | void VMError::reset_signal_handlers() { |
| aoqi@0 | 110 | // Save sigflags for resetted signals |
| aoqi@0 | 111 | save_signal(0, SIGSEGV); |
| aoqi@0 | 112 | save_signal(1, SIGBUS); |
| aoqi@0 | 113 | os::signal(SIGSEGV, CAST_FROM_FN_PTR(void *, crash_handler)); |
| aoqi@0 | 114 | os::signal(SIGBUS, CAST_FROM_FN_PTR(void *, crash_handler)); |
| aoqi@0 | 115 | } |
