[haiku-bugs] Re: [Haiku] #9945: BMediaFile leaks ca. 100 KB
- From: "ttcoder" <trac@xxxxxxxxxxxx>
- Date: Sun, 08 Sep 2013 11:17:17 -0000
#9945: BMediaFile leaks ca. 100 KB
------------------------------------+----------------------------
Reporter: ttcoder | Owner: nobody
Type: bug | Status: new
Priority: normal | Milestone: R1
Component: Audio & Video/Codecs | Version: R1/Development
Resolution: | Keywords: ffmpeg
Blocked By: | Blocking:
Has a Patch: 0 | Platform: All
------------------------------------+----------------------------
Changes (by ttcoder):
* priority: high => normal
Comment:
@korli: Roxors! kudos to you. The leak went down dramatically from 100KB
(in multiple allocs) to 2072 bytes (in one alloc):
{{{
src_plugins> LD_PRELOAD=libroot_debug.so ./BMediaFile-leak
(....)
total allocations: 824; total bytes: 196008
total allocations: 826; total bytes: 200152
total allocations: 827; total bytes: 202224
total allocations: 828; total bytes: 204296
total allocations: 829; total bytes: 206368
total allocations: 830; total bytes: 208440
total allocations: 831; total bytes: 210512
total allocations: 832; total bytes: 212584
total allocations: 833; total bytes: 214656
}}}
Leaking 50 times more slowly than before, a station could go on for close
to a year before even needing an app restart. Bug's 99% fixed and no
longer urgent in my mind at all.
@anevilyak: no matter how many times I run the above .cpp from Terminal,
its {{{new BMediaFile}}} constructor call always allocates the object at
the same address, as is the embedded mp3 codec (see below); I probably
misunderstand what ASLR is about though, that would be odd if my simple
test case had uncovered a kernel problem of any sort. This is with
hrev46033 retrieved just now.
Run 1:
{{{
src_plugins> LD_PRELOAD=libroot_debug.so ./BMediaFile-leak
[mp3 @ 0x18092800] max_analyze_duration 5000000 reached at 5015510
...
}}}
Run 2:
{{{
src_plugins> LD_PRELOAD=libroot_debug.so ./BMediaFile-leak
[mp3 @ 0x18092800] max_analyze_duration 5000000 reached at 5015510
...
}}}
--
Ticket URL: <http://dev.haiku-os.org/ticket/9945#comment:7>
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