Help: No stack traces recorded!

[hcg2008]

bleak viewer

found leak!

LeakShare 8000280 x within closure of window.VUE_HOT_MAP["data-v-ed7ab756"].options.data

No stack traces recorded! This could indicate a bug in BLeak. If your application is publicly available, please file a bug report on GitHub with your configuration file so we can look into the problem.

============================
bleak run

bleak run --config bleak_config-1.js --out ./output/ --snapshot

DevTools listening on ws://127.0.0.1:51565/devtools/browser/afe893c6-bf9f-4f77-9ebb-9c9b16c15112
2018-09-09 22:03:55.098 Google Chrome[7342:184561] *** Owner supplied to -[NSTrackingArea initWithRect:options:owner:userInfo:] referenced a deallocating object. Tracking area behavior is undefined. Break on NSTrackingAreaDeallocatingOwnerError to debug.
[ ] 1% [1/116] 0.0s (ETA 0.1s) Navigating to http://127.0.0.1:3000/(node:7334) [DEP0005] DeprecationWarning: Buffer() is deprecated due to security and usability issues. Please use the Buffer.alloc(), Buffer.allocUnsafe(), or Buffer.from() methods instead.
DeprecationWarning: Buffer() is deprecated due to security and usability issues. Please use the Buffer.alloc(), Buffer.allocUnsafe(), or Buffer.from() methods instead.
at showFlaggedDeprecation (buffer.js:160:11)
at new Buffer (buffer.js:175:3)
at embedSourceMap (/Volumes/Customer/MyProject/NodeJS/BLeak/dist/node/lib/closure_state_transform.js:1955:74)
at tryJSTransform (/Volumes/Customer/MyProject/NodeJS/BLeak/dist/node/lib/closure_state_transform.js:1989:16)
at Object.ensureES5 (/Volumes/Customer/MyProject/NodeJS/BLeak/dist/node/lib/closure_state_transform.js:2039:12)
at log.timeEvent (/Volumes/Customer/MyProject/NodeJS/BLeak/dist/node/lib/mitmproxy_interceptor.js:138:77)
at ProgressProgressBar.timeEvent (/Volumes/Customer/MyProject/NodeJS/BLeak/dist/node/lib/progress_progress_bar.js:81:20)
at interceptor (/Volumes/Customer/MyProject/NodeJS/BLeak/dist/node/lib/mitmproxy_interceptor.js:137:29)
at log.timeEvent (/Volumes/Customer/MyProject/NodeJS/BLeak/dist/node/lib/mitmproxy_interceptor.js:147:13)
at ProgressProgressBar.timeEvent (/Volumes/Customer/MyProject/NodeJS/BLeak/dist/node/lib/progress_progress_bar.js:81:20)
[====================] 100% [116/116] 41.1s (ETA 0.0s) Retrieving stack traces
Results can be found in ./output/

=============================
bleak find-growing-paths

bleak find-growing-paths output/snapshots/leak_detection/snapshot_0.heapsnapshot.gz output/snapshots/leak_detection/snapshot_1.heapsnapshot.gz output/snapshots/leak_detection/snapshot_2.heapsnapshot.gz output/snapshots/leak_detection/snapshot_3.heapsnapshot.gz
Processing output/snapshots/leak_detection/snapshot_0.heapsnapshot.gz...
Processing output/snapshots/leak_detection/snapshot_1.heapsnapshot.gz...
Processing output/snapshots/leak_detection/snapshot_2.heapsnapshot.gz...
Processing output/snapshots/leak_detection/snapshot_3.heapsnapshot.gz...
Time to run Get Growing Objects: 0.109 seconds.
Found 2 growing paths.

Report

• LeakShare: 8000280, Retained Size: 8000280, Transitive Closure Size: 8017912
  • x within closure of window.VUE_HOT_MAP["data-v-ed7ab756"].options.data
• LeakShare: 1328, Retained Size: 1328, Transitive Closure Size: 18960
  • positionStore within closure of window.$nuxt._router.proto.constructor
    Exploring the heap!
    Current Node: [Synthetic]
    [..] Previous node, [h] unhide system properties, [f (string)] Filter, [q] Quit
    [0] 1 =[Element]=> (GC roots) [Synthetic] [Count: 22] [Non-leak-reachable? false, Leak visits: 0, NI: 1]
    [1] 2 =[Shortcut]=> Window / http://127.0.0.1 [Native] [Count: 1543] [Non-leak-reachable? true, Leak visits: 0, NI: 1704]
    [2] 3 =[Shortcut]=> Object / [Object] [Count: 124] [Non-leak-reachable? true, Leak visits: 0, NI: 1766]
    [3] 4 =[Element]=> Pending activities [Native] [Count: 2] [Non-leak-reachable? true, Leak visits: 0, NI: 126944]

[jvilk]

Thanks for filing the bug. Is the application that you have run BLeak on open source or could you make it available to me somehow? I'm guessing there is a bug in BLeak's JavaScript rewriting process that misses this variable somehow.

[hcg2008]

Thanks!

I run a example from https://github.com/sdras/sample-vue-shop.git.

=====================
In the example, I created a leak by adding following code to pages/women.vue.

var x = [];

function grow() {
x.push(new Array(2000000).join('x'));
}
and adding grow(); in
computed: {
wProducts() {
grow();
return .....
It will leak 2M memory each loop.

2. the config script:
   =============================
   exports.url = "http://127.0.0.1:3000/";

exports.loop = [
// First state
{
check: function() { return !!document.getElementsByTagName('img'); },
// check: function() { return document.getElementsByTagName('img')[4].src == "http://127.0.0.1:3000/hat1.png"; },
next: function() { document.getElementsByTagName('li')[0].click(); }
},
{
check: function() { return !!document.getElementsByTagName('img'); },
// check: function() { return document.getElementsByTagName('img')[4].src == "http://127.0.0.1:3000/jacket3.png"; },
next: function() { document.getElementsByTagName('li')[1].click(); }
},
{
check: function() { return !!document.getElementsByTagName('img'); },
// check: function() { return document.getElementsByTagName('img')[4].src == "http://127.0.0.1:3000/sweater2.png"; },
next: function() { document.getElementsByTagName('a')[0].click(); }
},
];

// (Optional) Number of loop iterations to perform during leak detection (default: 8)
exports.iterations = 4;

==============
I changed the file bleak_agents.ts by replacing all
xxxxx.hasOwnProperty()
with
Object.prototype.hasOwnProperty.call()
because I got "Uncaught TypeError"