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comparison src/os/aix/vm/vmError_aix.cpp @ 14415:666e6ce3976c

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8023038: PPC64 (part 15): Platform files for AIX/PPC64 support Reviewed-by: kvn
author simonis
date Fri, 06 Sep 2013 20:16:09 +0200
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14414:b83f7d608548 14415:666e6ce3976c
1 /*
2 * Copyright (c) 2003, 2013, 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.
18 *
19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
20 * or visit www.oracle.com if you need additional information or have any
21 * questions.
22 *
23 */
24
25 #include "precompiled.hpp"
26 #include "runtime/arguments.hpp"
27 #include "runtime/os.hpp"
28 #include "runtime/thread.hpp"
29 #include "utilities/vmError.hpp"
30
31 #include <sys/types.h>
32 #include <sys/wait.h>
33 #include <unistd.h>
34 #include <signal.h>
35
36 void VMError::show_message_box(char *buf, int buflen) {
37 bool yes;
38 do {
39 error_string(buf, buflen);
40 int len = (int)strlen(buf);
41 char *p = &buf[len];
42
43 jio_snprintf(p, buflen - len,
44 "\n\n"
45 "Do you want to debug the problem?\n\n"
46 "To debug, run 'dbx -a %d'; then switch to thread tid " INTX_FORMAT ", k-tid " INTX_FORMAT "\n"
47 "Enter 'yes' to launch dbx automatically (PATH must include dbx)\n"
48 "Otherwise, press RETURN to abort...",
49 os::current_process_id(),
50 os::current_thread_id(), thread_self());
51
52 yes = os::message_box("Unexpected Error", buf);
53
54 if (yes) {
55 // yes, user asked VM to launch debugger
56 jio_snprintf(buf, buflen, "dbx -a %d", os::current_process_id());
57
58 os::fork_and_exec(buf);
59 yes = false;
60 }
61 } while (yes);
62 }
63
64 // Handle all synchronous signals which may happen during signal handling,
65 // not just SIGSEGV and SIGBUS.
66 static const int SIGNALS[] = { SIGSEGV, SIGBUS, SIGILL, SIGFPE, SIGTRAP }; // add more if needed
67 static const int NUM_SIGNALS = sizeof(SIGNALS) / sizeof(int);
68
69 // Space for our "saved" signal flags and handlers
70 static int resettedSigflags[NUM_SIGNALS];
71 static address resettedSighandler[NUM_SIGNALS];
72
73 static void save_signal(int idx, int sig) {
74 struct sigaction sa;
75 sigaction(sig, NULL, &sa);
76 resettedSigflags[idx] = sa.sa_flags;
77 resettedSighandler[idx] = (sa.sa_flags & SA_SIGINFO)
78 ? CAST_FROM_FN_PTR(address, sa.sa_sigaction)
79 : CAST_FROM_FN_PTR(address, sa.sa_handler);
80 }
81
82 int VMError::get_resetted_sigflags(int sig) {
83 // Handle all program errors.
84 for (int i = 0; i < NUM_SIGNALS; i++) {
85 if (SIGNALS[i] == sig) {
86 return resettedSigflags[i];
87 }
88 }
89 return -1;
90 }
91
92 address VMError::get_resetted_sighandler(int sig) {
93 // Handle all program errors.
94 for (int i = 0; i < NUM_SIGNALS; i++) {
95 if (SIGNALS[i] == sig) {
96 return resettedSighandler[i];
97 }
98 }
99 return NULL;
100 }
101
102 static void crash_handler(int sig, siginfo_t* info, void* ucVoid) {
103 // Unmask current signal.
104 sigset_t newset;
105 sigemptyset(&newset);
106 sigaddset(&newset, sig);
107
108 Unimplemented();
109 }
110
111 void VMError::reset_signal_handlers() {
112 sigset_t newset;
113 sigemptyset(&newset);
114
115 for (int i = 0; i < NUM_SIGNALS; i++) {
116 save_signal(i, SIGNALS[i]);
117 os::signal(SIGNALS[i], CAST_FROM_FN_PTR(void *, crash_handler));
118 sigaddset(&newset, SIGNALS[i]);
119 }
120
121 sigthreadmask(SIG_UNBLOCK, &newset, NULL);
122 }