| // 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); |
| |