1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
|
// Copyright Joyent, Inc. and other Node contributors.
//
// Permission is hereby granted, free of charge, to any person obtaining a
// copy of this software and associated documentation files (the
// "Software"), to deal in the Software without restriction, including
// without limitation the rights to use, copy, modify, merge, publish,
// distribute, sublicense, and/or sell copies of the Software, and to permit
// persons to whom the Software is furnished to do so, subject to the
// following conditions:
//
// The above copyright notice and this permission notice shall be included
// in all copies or substantial portions of the Software.
//
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
// OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
// MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN
// NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM,
// DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
// OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE
// USE OR OTHER DEALINGS IN THE SOFTWARE.
var common = require('../common');
var assert = require('assert');
var os = require('os');
var util = require('util');
if (os.type() != 'SunOS') {
console.error('Skipping because postmortem debugging not available.');
process.exit(0);
}
/*
* Some functions to create a recognizable stack.
*/
var frames = [ 'stalloogle', 'bagnoogle', 'doogle' ];
var expected;
var stalloogle = function (str) {
expected = str;
os.loadavg();
};
var bagnoogle = function (arg0, arg1) {
stalloogle(arg0 + ' is ' + arg1 + ' except that it is read-only');
};
var done = false;
var doogle = function () {
if (!done)
setTimeout(doogle, 10);
bagnoogle('The bfs command', '(almost) like ed(1)');
};
var spawn = require('child_process').spawn;
var prefix = '/var/tmp/node';
var corefile = prefix + '.' + process.pid;
var args = [ corefile ];
if (process.env.MDB_LIBRARY_PATH && process.env.MDB_LIBRARY_PATH != '')
args = args.concat([ '-L', process.env.MDB_LIBRARY_PATH ]);
/*
* We're going to use DTrace to stop us, gcore us, and set us running again
* when we call getloadavg() -- with the implicit assumption that our
* deepest function is the only caller of os.loadavg().
*/
var dtrace = spawn('dtrace', [ '-qwn', 'syscall::getloadavg:entry/pid == ' +
process.pid + '/{stop(); system("gcore -o ' +
prefix + ' %d", pid); system("prun %d", pid); exit(0); }' ]);
var output = '';
var unlinkSync = require('fs').unlinkSync;
dtrace.stderr.on('data', function (data) {
console.log('dtrace: ' + data);
});
dtrace.on('exit', function (code) {
if (code != 0) {
console.error('dtrace exited with code ' + code);
process.exit(code);
}
done = true;
/*
* We have our core file. Now we need to fire up mdb to analyze it...
*/
var mdb = spawn('mdb', args, { stdio: 'pipe' });
mdb.on('exit', function (code) {
var retained = '; core retained as ' + corefile;
if (code != 0) {
console.error('mdb exited with code ' + code + retained);
process.exit(code);
}
var sentinel = '<anonymous> (as ';
var arg1 = ' arg1: ';
var lines = output.split('\n');
var matched = 0;
var straddr = undefined;
for (var i = 0; i < lines.length; i++) {
var line = lines[i];
if (matched == 1 && line.indexOf(arg1) === 0) {
straddr = line.substr(arg1.length).split(' ')[0];
}
if (line.indexOf(sentinel) == -1 || frames.length === 0)
continue;
var frame = line.substr(line.indexOf(sentinel) + sentinel.length);
var top = frames.shift();
assert.equal(frame.indexOf(top), 0, 'unexpected frame where ' +
top + ' was expected' + retained);
matched++;
}
assert.equal(frames.length, 0, 'did not find expected frame ' +
frames[0] + retained);
assert.notEqual(straddr, undefined,
'did not find arg1 for top frame' + retained);
/*
* Now we're going to take one more swing at the core file to print out
* the argument string that we found.
*/
output = '';
mdb = spawn('mdb', args, { stdio: 'pipe' });
mdb.on('exit', function (code) {
if (code != 0) {
console.error('mdb (second) exited with code ' + code + retained);
process.exit(code);
}
assert.notEqual(output.indexOf(expected), -1, 'did not find arg1 (' +
straddr + ') to contain expected string' + retained);
unlinkSync(corefile);
process.exit(0);
});
mdb.stdout.on('data', function (data) {
output += data;
});
mdb.stderr.on('data', function (data) {
console.log('mdb (second) stderr: ' + data);
});
mdb.stdin.write('::load v8.so\n');
mdb.stdin.write(straddr + '::v8str\n');
mdb.stdin.end();
});
mdb.stdout.on('data', function (data) {
output += data;
});
mdb.stderr.on('data', function (data) {
console.log('mdb stderr: ' + data);
});
mdb.stdin.write('::load v8.so\n');
mdb.stdin.write('::jsstack -v\n');
mdb.stdin.end();
});
setTimeout(doogle, 10);
|
