nfilt.js

var fs = require('fs');

var lstream = require('lstream');

var ls = new lstream();

process.stdin.pipe(ls);
   
var symbolTable = JSON.parse(fs.readFileSync(process.argv[2], 'utf8'));

ls.on('line', function(line) {
  var l = line.trim();
  if (l.match(/^0x[a-f0-9]{8}/) && symbolTable[l]) {
    line = line.replace(/0x[a-f0-9]{8}/, symbolTable[l]);
  } 
    
  console.log(line);
});

t.d

#!/usr/sbin/dtrace -s

pid$1::umem_alloc:entry
/arg0 > 2048 && arg0 <= 4096/
{
  self->cache = arg0;
}

pid$1::umem_cache_alloc:entry
/self->cache/
{
  printf("\n>>>>>>>>\n");
  jstack(200, 8000);
  ustack(200);
  printf("\n<<<<<<<<\n");
  self->cache = 0;
}

t.js

var assert = require('assert');

var lstream = require('lstream');

var ls = new lstream();
  
process.stdin.pipe(ls);

var jstack = undefined;
var ustack = undefined;
var cur = undefined;
  
var symbolTable = {};
  
ls.on('line', function(line) {
  if (line.match(/>>>>>>>>/)) {
    cur = jstack = [];
    ustack = [];
  } else if (line.match(/<<<<<<<</)) {
    ustack.forEach(function(frame, index) {
      frame = frame.trim();
      if (frame.match(/^0x[a-f0-9]{8}/)) {
        var jframe = jstack[index].trim();
        if (!symbolTable[frame]) {
          symbolTable[frame] = jframe;
        } else {
          assert.strictEqual(symbolTable[frame], jframe);
        }
      }
    });

    jstack = undefined;
    ustack = undefined;
  } else if (jstack) {
    if (!jstack || (jstack.length === 0 && !line.trim()))
      return;

    if (!line.trim()) {
      cur = ustack;
    } else {
      cur.push(line);
    }
  }
});

function printit() {
  console.log(JSON.stringify(symbolTable, null, '  '));
}

process.on('exit', printit);
process.on('SIGUSR2', printit);