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* [Bug malloc/27928] New: mallinfo doc contains incorrect information about arenas
@ 2021-05-28 13:17 crusaderky at gmail dot com
2021-06-02 6:25 ` [Bug malloc/27928] " alucca388 at gmail dot com
2021-06-02 7:54 ` crusaderky at gmail dot com
0 siblings, 2 replies; 3+ messages in thread
From: crusaderky at gmail dot com @ 2021-05-28 13:17 UTC (permalink / raw)
To: glibc-bugs
https://sourceware.org/bugzilla/show_bug.cgi?id=27928
Bug ID: 27928
Summary: mallinfo doc contains incorrect information about
arenas
Product: glibc
Version: 2.33
Status: UNCONFIRMED
Severity: minor
Priority: P2
Component: malloc
Assignee: unassigned at sourceware dot org
Reporter: crusaderky at gmail dot com
Target Milestone: ---
The mallinfo/mallinfo2 man and info pages state:
Information is returned for only the main memory allocation area. Al‐
locations in other arenas are excluded. See malloc_stats(3) and mal‐
loc_info(3) for alternatives that include information about other are‐
nas.
This to me seems to be incorrect; by reading the source code I understand that
mallinfo/mallinfo2 return the sum of all arenas ("Total" section in
malloc_stats) and not just that of the main arena ("Arena 0" in malloc_stats).
On a related note, it would help to have the printf in malloc_stats tweaked to
clarify that "Arena 0" is a synonym for the main arena.
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* [Bug malloc/27928] mallinfo doc contains incorrect information about arenas
2021-05-28 13:17 [Bug malloc/27928] New: mallinfo doc contains incorrect information about arenas crusaderky at gmail dot com
@ 2021-06-02 6:25 ` alucca388 at gmail dot com
2021-06-02 7:54 ` crusaderky at gmail dot com
1 sibling, 0 replies; 3+ messages in thread
From: alucca388 at gmail dot com @ 2021-06-02 6:25 UTC (permalink / raw)
To: glibc-bugs
https://sourceware.org/bugzilla/show_bug.cgi?id=27928
Anna Lucca <alucca388 at gmail dot com> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |alucca388 at gmail dot com
--- Comment #1 from Anna Lucca <alucca388 at gmail dot com> ---
Information is returned for only the main memory allocation area. Al‐
locations in other arenas are excluded. See malloc_stats(3) and mal‐
loc_info(3) for alternatives that include information about other are‐
nas.
I don't see anything wrong here https://impostor-game.com
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* [Bug malloc/27928] mallinfo doc contains incorrect information about arenas
2021-05-28 13:17 [Bug malloc/27928] New: mallinfo doc contains incorrect information about arenas crusaderky at gmail dot com
2021-06-02 6:25 ` [Bug malloc/27928] " alucca388 at gmail dot com
@ 2021-06-02 7:54 ` crusaderky at gmail dot com
1 sibling, 0 replies; 3+ messages in thread
From: crusaderky at gmail dot com @ 2021-06-02 7:54 UTC (permalink / raw)
To: glibc-bugs
https://sourceware.org/bugzilla/show_bug.cgi?id=27928
--- Comment #2 from crusaderky at gmail dot com ---
The function shows the sum of all arenas - arena 0 + arena 1 + arena 2 + ...
The documentation says it only shows the "main" arena, or arena 0, which is the
first one. This is not correct.
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2021-05-28 13:17 [Bug malloc/27928] New: mallinfo doc contains incorrect information about arenas crusaderky at gmail dot com
2021-06-02 6:25 ` [Bug malloc/27928] " alucca388 at gmail dot com
2021-06-02 7:54 ` crusaderky at gmail dot com
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