Mercurial > hg > graal-compiler
annotate src/os/linux/vm/vmError_linux.cpp @ 1926:a1e319b5b13a
Merge
author | trims |
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date | Thu, 11 Nov 2010 23:29:32 -0800 |
parents | c18cbe5936b8 |
children | f95d63e2154a |
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0 | 1 /* |
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2 * Copyright (c) 2003, 2006, 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
6941466: Oracle rebranding changes for Hotspot repositories
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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 | |
25 # include "incls/_precompiled.incl" | |
26 # include "incls/_vmError_linux.cpp.incl" | |
27 | |
28 #include <sys/types.h> | |
29 #include <sys/wait.h> | |
30 #include <sys/syscall.h> | |
31 #include <unistd.h> | |
32 #include <signal.h> | |
33 | |
34 void VMError::show_message_box(char *buf, int buflen) { | |
35 bool yes; | |
36 do { | |
37 error_string(buf, buflen); | |
38 int len = (int)strlen(buf); | |
39 char *p = &buf[len]; | |
40 | |
41 jio_snprintf(p, buflen - len, | |
42 "\n\n" | |
43 "Do you want to debug the problem?\n\n" | |
44 "To debug, run 'gdb /proc/%d/exe %d'; then switch to thread " INTX_FORMAT "\n" | |
45 "Enter 'yes' to launch gdb automatically (PATH must include gdb)\n" | |
46 "Otherwise, press RETURN to abort...", | |
47 os::current_process_id(), os::current_process_id(), | |
48 os::current_thread_id()); | |
49 | |
50 yes = os::message_box("Unexpected Error", buf); | |
51 | |
52 if (yes) { | |
53 // yes, user asked VM to launch debugger | |
54 jio_snprintf(buf, buflen, "gdb /proc/%d/exe %d", | |
55 os::current_process_id(), os::current_process_id()); | |
56 | |
57 os::fork_and_exec(buf); | |
58 yes = false; | |
59 } | |
60 } while (yes); | |
61 } | |
62 | |
63 // Space for our "saved" signal flags and handlers | |
64 static int resettedSigflags[2]; | |
65 static address resettedSighandler[2]; | |
66 | |
67 static void save_signal(int idx, int sig) | |
68 { | |
69 struct sigaction sa; | |
70 sigaction(sig, NULL, &sa); | |
71 resettedSigflags[idx] = sa.sa_flags; | |
72 resettedSighandler[idx] = (sa.sa_flags & SA_SIGINFO) | |
73 ? CAST_FROM_FN_PTR(address, sa.sa_sigaction) | |
74 : CAST_FROM_FN_PTR(address, sa.sa_handler); | |
75 } | |
76 | |
77 int VMError::get_resetted_sigflags(int sig) { | |
78 if(SIGSEGV == sig) { | |
79 return resettedSigflags[0]; | |
80 } else if(SIGBUS == sig) { | |
81 return resettedSigflags[1]; | |
82 } | |
83 return -1; | |
84 } | |
85 | |
86 address VMError::get_resetted_sighandler(int sig) { | |
87 if(SIGSEGV == sig) { | |
88 return resettedSighandler[0]; | |
89 } else if(SIGBUS == sig) { | |
90 return resettedSighandler[1]; | |
91 } | |
92 return NULL; | |
93 } | |
94 | |
95 static void crash_handler(int sig, siginfo_t* info, void* ucVoid) { | |
96 // unmask current signal | |
97 sigset_t newset; | |
98 sigemptyset(&newset); | |
99 sigaddset(&newset, sig); | |
100 sigprocmask(SIG_UNBLOCK, &newset, NULL); | |
101 | |
102 VMError err(NULL, sig, NULL, info, ucVoid); | |
103 err.report_and_die(); | |
104 } | |
105 | |
106 void VMError::reset_signal_handlers() { | |
107 // Save sigflags for resetted signals | |
108 save_signal(0, SIGSEGV); | |
109 save_signal(1, SIGBUS); | |
110 os::signal(SIGSEGV, CAST_FROM_FN_PTR(void *, crash_handler)); | |
111 os::signal(SIGBUS, CAST_FROM_FN_PTR(void *, crash_handler)); | |
112 } |