1299683 - Memory leak from JSRuntime::init when not on the main thread

Status: UNCONFIRMED

(Core :: JavaScript Engine, defect, P3)

Description

[oag]

Attachment: valgrind.txt

User Agent: Mozilla/5.0 (X11; Ubuntu; Linux x86_64; rv:48.0) Gecko/20100101 Firefox/48.0
Build ID: 20160728203720

Steps to reproduce:

Wrote a program which creates, uses and destroys a JSRuntime and JSContext on a thread which is not the main thread. Profiled that program (unit test runner) with Valgrind.


Actual results:

A small leak was observed: see attached valgrind.txt.

The leak does not occur when equivalent code runs only on the main thread. In fact the attached Valgrind report comes from a program which creates and destroys at least a dozen JSRuntimes on the main thread.




Expected results:

Valgrind should not report any leaked memory.

Comment 1

[Andrew McCreight [:mccr8]]

This looks like it is a leak involving an embedding of the SpiderMonkey engine, and we focus on Firefox in particular in MemShrink.