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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);
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