Commit Graph

8 Commits

Author SHA1 Message Date
6b8dc5511f library: refactor and rely on modern kernels for wchan
Several Debian based distributions were recently found
to have omitted a kernel configuration option that had
the effect of rendering /proc/#/stat and /proc/#/wchan
useless for providing any 'sleeping in function' info.

That problem also prompted a reevaluation of the whole
approach to wchan matters which had grown increasingly
complex as our library evolved over the last 13 years.

The net result was a decision to rely on /proc/#/wchan
which arrived along with the 2.5 kernel. This then let
us vastly simplify the internal code plus the external
interface which will benefit both the top and ps pgms.

Reference(s):
http://www.freelists.org/post/procps/WCHAN,11
https://lkml.org/lkml/2008/11/6/12
https://bugs.debian.org/711592

Signed-off-by: Jim Warner <james.warner@comcast.net>
2015-06-19 19:09:20 +10:00
a909f6e917 Change restrict to __restrict in public includes
procps automake defines restrict which means the binaries for procps
binaries compile. However external programs may not of defined
restrict which means they will not complie if they include files found
in /usr/include/proc.

Includes from libc6 use __restrict and if is good enough for
them, its good enough for us.
2012-01-09 21:44:51 +11:00
7126cc4491 library: expanded/generalized memory allocation provisions
A callback provision in the form of xalloc_err_handler
(of type message_fn) was added to the alloc module.

This change allowed a program like top, who alters the
termios structure, to override the default fprint(stderr...)
behavior in the event of an error.

The new function xstrdup was also added for symmetry.
2011-12-11 22:26:49 +11:00
86de01f3d0 Linux 2.6.17 tty devices. Lose support for original pty numbering. 2006-07-09 04:41:30 +00:00
266d5b708a wchan for multithreaded process is now ~0ull or "*" 2004-07-21 21:17:35 +00:00
0a03eac352 malloc error 2003-01-23 05:48:27 +00:00
8a745812cf Linux 2.5.xx /proc/*/wchan 2002-12-12 21:58:12 +00:00
5087f3dbf6 big header clean-up 2002-12-09 07:00:07 +00:00