628374 - Memory leak: XUL's JS_sprintf_append leaks 4,88 KB of data

Status: VERIFIED INCOMPLETE

(Core :: JavaScript Engine, defect)

Description

[Jan Bambach [:Jan]]

Attachment: More information.

Memory leak:
Process: firefox-bin
Reponsible Library: XUL
Responsible Frame: JS_sprintf_append
Memory Addresses: See attachment

Steps to reproduce: Start Firefox.

Expected Result: Firefox shouldn't leak memory.

Actual Result: Firefox leaks memory.


User Agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10.6; rv:2.0b9) Gecko/20100101 Firefox/4.0b9

Comment 1

[Brendan Eich [:brendan]]

Need stack backtracing to get somewhere.

/be

Comment 2

[Nicholas Nethercote [inactive]]

What tool created that attachment?

Comment 3

[Philipp Kempgen]

> What tool created that attachment?

Instruments from Apple's Developer Tools I'd say.
http://en.wikipedia.org/wiki/Instruments_%28application%29
It reports memory leaks for the JS_sprintf_append and
JS_FindCompilationScope frames for me as well.
Firefox 5.0.1.

Comment 4

[Jesse Ruderman]

We looked at JS_sprintf_append and thought it didn't look suspicious.

Maybe this report was produced using a build of Firefox without full native symbols, so the tool had to guess?  It's suspicious that there isn't an offset from the symbol name.

Small leak-through-shutdown bugs will soon be found by running Firefox under Valgrind regularly. See bug 631811.