Mercurial > hg > truffle
annotate src/os/linux/vm/vmError_linux.cpp @ 10558:9d3265486aad
Fix for new warnings showing up when using Kepler eclipse.
author | Thomas Wuerthinger <thomas.wuerthinger@oracle.com> |
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date | Thu, 27 Jun 2013 14:15:27 +0200 |
parents | c3e799c37717 |
children |
rev | line source |
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0 | 1 /* |
1972 | 2 * Copyright (c) 2003, 2010, Oracle and/or its affiliates. All rights reserved. |
0 | 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 * | |
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19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
c18cbe5936b8
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20 * or visit www.oracle.com if you need additional information or have any |
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21 * questions. |
0 | 22 * |
23 */ | |
24 | |
1972 | 25 #include "precompiled.hpp" |
26 #include "runtime/arguments.hpp" | |
27 #include "runtime/os.hpp" | |
28 #include "runtime/thread.hpp" | |
29 #include "utilities/vmError.hpp" | |
0 | 30 |
31 #include <sys/types.h> | |
32 #include <sys/wait.h> | |
33 #include <sys/syscall.h> | |
34 #include <unistd.h> | |
35 #include <signal.h> | |
36 | |
37 void VMError::show_message_box(char *buf, int buflen) { | |
38 bool yes; | |
39 do { | |
40 error_string(buf, buflen); | |
41 int len = (int)strlen(buf); | |
42 char *p = &buf[len]; | |
43 | |
44 jio_snprintf(p, buflen - len, | |
45 "\n\n" | |
46 "Do you want to debug the problem?\n\n" | |
6843 | 47 "To debug, run 'gdb /proc/%d/exe %d'; then switch to thread " UINTX_FORMAT " (" INTPTR_FORMAT ")\n" |
0 | 48 "Enter 'yes' to launch gdb automatically (PATH must include gdb)\n" |
49 "Otherwise, press RETURN to abort...", | |
50 os::current_process_id(), os::current_process_id(), | |
2008 | 51 os::current_thread_id(), os::current_thread_id()); |
0 | 52 |
53 yes = os::message_box("Unexpected Error", buf); | |
54 | |
55 if (yes) { | |
56 // yes, user asked VM to launch debugger | |
57 jio_snprintf(buf, buflen, "gdb /proc/%d/exe %d", | |
58 os::current_process_id(), os::current_process_id()); | |
59 | |
60 os::fork_and_exec(buf); | |
61 yes = false; | |
62 } | |
63 } while (yes); | |
64 } | |
65 | |
66 // Space for our "saved" signal flags and handlers | |
67 static int resettedSigflags[2]; | |
68 static address resettedSighandler[2]; | |
69 | |
70 static void save_signal(int idx, int sig) | |
71 { | |
72 struct sigaction sa; | |
73 sigaction(sig, NULL, &sa); | |
74 resettedSigflags[idx] = sa.sa_flags; | |
75 resettedSighandler[idx] = (sa.sa_flags & SA_SIGINFO) | |
76 ? CAST_FROM_FN_PTR(address, sa.sa_sigaction) | |
77 : CAST_FROM_FN_PTR(address, sa.sa_handler); | |
78 } | |
79 | |
80 int VMError::get_resetted_sigflags(int sig) { | |
81 if(SIGSEGV == sig) { | |
82 return resettedSigflags[0]; | |
83 } else if(SIGBUS == sig) { | |
84 return resettedSigflags[1]; | |
85 } | |
86 return -1; | |
87 } | |
88 | |
89 address VMError::get_resetted_sighandler(int sig) { | |
90 if(SIGSEGV == sig) { | |
91 return resettedSighandler[0]; | |
92 } else if(SIGBUS == sig) { | |
93 return resettedSighandler[1]; | |
94 } | |
95 return NULL; | |
96 } | |
97 | |
98 static void crash_handler(int sig, siginfo_t* info, void* ucVoid) { | |
99 // unmask current signal | |
100 sigset_t newset; | |
101 sigemptyset(&newset); | |
102 sigaddset(&newset, sig); | |
103 sigprocmask(SIG_UNBLOCK, &newset, NULL); | |
104 | |
105 VMError err(NULL, sig, NULL, info, ucVoid); | |
106 err.report_and_die(); | |
107 } | |
108 | |
109 void VMError::reset_signal_handlers() { | |
110 // Save sigflags for resetted signals | |
111 save_signal(0, SIGSEGV); | |
112 save_signal(1, SIGBUS); | |
113 os::signal(SIGSEGV, CAST_FROM_FN_PTR(void *, crash_handler)); | |
114 os::signal(SIGBUS, CAST_FROM_FN_PTR(void *, crash_handler)); | |
115 } |