svn commit: r361035 - in releng/11.4: lib/libsysdecode sys/fs/procfs sys/sys usr.sbin/procctl

[John Baldwin]

On 5/14/20 10:55 AM, Eugene Grosbein wrote:
> 15.05.2020 0:47, John Baldwin wrote:
> 
>> Author: jhb
>> Date: Thu May 14 17:47:55 2020
>> New Revision: 361035
>> URL: https://svnweb.freebsd.org/changeset/base/361035
>>
>> Log:
>>   MF11 361020: Deprecate procfs-based process debugging.
>>   
>>   359047:
>>   Mark procfs-based process debugging as deprecated for FreeBSD 13.
>>   
>>   Attempting to use ioctls on /proc/<pid>/mem to control a process will
>>   trigger warnings on the console.  The <sys/pioctl.h> include file will
>>   also now emit a compile-time warning when used from userland.
>>   
>>   359054:
>>   Fix the workaround to ignore the #warning for GCC.
>>   
>>   clang and gcc use different warning flags for #warning preprocessor
>>   directives.
>>   
>>   For both 12 and 11, adjust the GCC warning flags to only be added in
>>   4.7 and later since 4.2.1 does not support -Wno-cpp.  For 11, add the
>>   needed warning suppression to procctl's build.  procctl was removed in
>>   12.0.
>>   
>>   Approved by:	re (gjb, kib)
> 
> Please consider adding a sysctl or another way to disable such extra warnings for jailed process,
> so it would be possible running old versions of FreeBSD in a jail seamless.

They are rate limited now, but you also probably have no existing processes that
are using this.  strace on i386 from ports (for which truss is a more functional
replacement) is the only binary still built in ports that uses this.  truss itself
was the last base system binary (aside from procctl which is only there as a
helper, not an actual util) and the last version of truss to use procfs was 6.x.

-- 
John Baldwin