Wed, 27 Mar 2013 19:21:18 +0100
7112912: Message "Error occurred during initialization of VM" on boxes with lots of RAM
Summary: Ergonomics now also takes available virtual memory into account when deciding for a heap size. The helper method to determine the maximum allocatable memory block now uses the appropriate OS specific calls to retrieve available virtual memory for the java process. In 32 bit environments this method now also searches for the maximum actually reservable amount of memory. Merge previously separate implementations for Linux/BSD/Solaris into a single method.
Reviewed-by: jmasa, tamao
1 /*
2 * Copyright (c) 2003, 2010, Oracle and/or its affiliates. All rights reserved.
3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
4 *
5 * This code is free software; you can redistribute it and/or modify it
6 * under the terms of the GNU General Public License version 2 only, as
7 * published by the Free Software Foundation.
8 *
9 * This code is distributed in the hope that it will be useful, but WITHOUT
10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
12 * version 2 for more details (a copy is included in the LICENSE file that
13 * accompanied this code).
14 *
15 * You should have received a copy of the GNU General Public License version
16 * 2 along with this work; if not, write to the Free Software Foundation,
17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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23 */
25 #include "precompiled.hpp"
26 #include "runtime/arguments.hpp"
27 #include "runtime/os.hpp"
28 #include "runtime/thread.hpp"
29 #include "utilities/vmError.hpp"
31 #include <sys/types.h>
32 #include <sys/wait.h>
33 #include <signal.h>
35 void VMError::show_message_box(char *buf, int buflen) {
36 bool yes;
37 do {
38 error_string(buf, buflen);
39 int len = (int)strlen(buf);
40 char *p = &buf[len];
42 jio_snprintf(p, buflen - len,
43 "\n\n"
44 "Do you want to debug the problem?\n\n"
45 "To debug, run 'dbx - %d'; then switch to thread " INTX_FORMAT "\n"
46 "Enter 'yes' to launch dbx automatically (PATH must include dbx)\n"
47 "Otherwise, press RETURN to abort...",
48 os::current_process_id(), os::current_thread_id());
50 yes = os::message_box("Unexpected Error", buf);
52 if (yes) {
53 // yes, user asked VM to launch debugger
54 jio_snprintf(buf, buflen, "dbx - %d", os::current_process_id());
56 os::fork_and_exec(buf);
57 yes = false;
58 }
59 } while (yes);
60 }
62 // Space for our "saved" signal flags and handlers
63 static int resettedSigflags[2];
64 static address resettedSighandler[2];
66 static void save_signal(int idx, int sig)
67 {
68 struct sigaction sa;
69 sigaction(sig, NULL, &sa);
70 resettedSigflags[idx] = sa.sa_flags;
71 resettedSighandler[idx] = (sa.sa_flags & SA_SIGINFO)
72 ? CAST_FROM_FN_PTR(address, sa.sa_sigaction)
73 : CAST_FROM_FN_PTR(address, sa.sa_handler);
74 }
76 int VMError::get_resetted_sigflags(int sig) {
77 if(SIGSEGV == sig) {
78 return resettedSigflags[0];
79 } else if(SIGBUS == sig) {
80 return resettedSigflags[1];
81 }
82 return -1;
83 }
85 address VMError::get_resetted_sighandler(int sig) {
86 if(SIGSEGV == sig) {
87 return resettedSighandler[0];
88 } else if(SIGBUS == sig) {
89 return resettedSighandler[1];
90 }
91 return NULL;
92 }
94 static void crash_handler(int sig, siginfo_t* info, void* ucVoid) {
95 // unmask current signal
96 sigset_t newset;
97 sigemptyset(&newset);
98 sigaddset(&newset, sig);
99 sigprocmask(SIG_UNBLOCK, &newset, NULL);
101 VMError err(NULL, sig, NULL, info, ucVoid);
102 err.report_and_die();
103 }
105 void VMError::reset_signal_handlers() {
106 // Save sigflags for resetted signals
107 save_signal(0, SIGSEGV);
108 save_signal(1, SIGBUS);
109 os::signal(SIGSEGV, CAST_FROM_FN_PTR(void *, crash_handler));
110 os::signal(SIGBUS, CAST_FROM_FN_PTR(void *, crash_handler));
111 }