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test: add tests for postmortem and DTrace support
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@bcantrill @piscisaureus
bcantrill authored and piscisaureus committed Sep 20, 2012
1 parent bbf6b4e commit cc1b09d
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107 changes: 107 additions & 0 deletions test/pummel/test-dtrace-jsstack.js
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// 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 DTrace 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;

/*
* 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 + '/{ustack(100, 8192); exit(0); }' ]);

var output = '';

dtrace.stderr.on('data', function (data) {
console.log('dtrace: ' + data);
});

dtrace.stdout.on('data', function (data) {
output += data;
});

dtrace.on('exit', function (code) {
if (code != 0) {
console.error('dtrace exited with code ' + code);
process.exit(code);
}

done = true;

var sentinel = '(anon) as ';
var lines = output.split('\n');

for (var i = 0; i < lines.length; i++) {
var line = lines[i];

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');
}

assert.equal(frames.length, 0, 'did not find expected frame ' + frames[0]);
process.exit(0);
});

setTimeout(doogle, 10);

99 changes: 99 additions & 0 deletions test/pummel/test-postmortem-findjsobjects.js
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// 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);
}

/*
* Now we're going to fork ourselves to gcore
*/
var spawn = require('child_process').spawn;
var prefix = '/var/tmp/node';
var corefile = prefix + '.' + process.pid;
var gcore = spawn('gcore', [ '-o', prefix, process.pid + '' ]);
var output = '';
var unlinkSync = require('fs').unlinkSync;
var args = [ corefile ];

if (process.env.MDB_LIBRARY_PATH && process.env.MDB_LIBRARY_PATH != '')
args = args.concat([ '-L', process.env.MDB_LIBRARY_PATH ]);

function LanguageH(chapter) { this.OBEY = 'CHAPTER ' + parseInt(chapter, 10); }
var obj = new LanguageH(1);

gcore.stderr.on('data', function (data) {
console.log('gcore: ' + data);
});

gcore.on('exit', function (code) {
if (code != 0) {
console.error('gcore exited with code ' + code);
process.exit(code);
}

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 ' + util.inspect(code) + retained);
process.exit(code);
}

var lines = output.split('\n');
var found = 0, i, expected = 'OBEY: ' + obj.OBEY, nexpected = 2;

for (var i = 0; i < lines.length; i++) {
if (lines[i].indexOf(expected) != -1)
found++;
}

assert.equal(found, nexpected, 'expected ' + nexpected +
' objects, found ' + found + retained);

unlinkSync(corefile);
process.exit(0);
});

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('::findjsobjects -c LanguageH | ');
mdb.stdin.write('::findjsobjects | ::jsprint\n');
mdb.stdin.write('::findjsobjects -p OBEY | ');
mdb.stdin.write('::findjsobjects | ::jsprint\n');
mdb.stdin.end();
});

179 changes: 179 additions & 0 deletions test/pummel/test-postmortem-jsstack.js
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// 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);

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