[Bug 198462] The system stops calling SIGPROF handler after some time

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https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=198462

            Bug ID: 198462
           Summary: The system stops calling SIGPROF handler after some
                    time
           Product: Base System
           Version: 10.1-RELEASE
          Hardware: Any
                OS: Any
            Status: New
          Severity: Affects Only Me
          Priority: ---
         Component: kern
          Assignee: freebsd-bugs at FreeBSD.org
          Reporter: ikosarev at accesssoftek.com

Created attachment 154094
  --> https://bugs.freebsd.org/bugzilla/attachment.cgi?id=154094&action=edit
The test source.

The output of the attached test indicates that after about a minute of run the
system doesn't call the SIGPROF handler anymore. The test works as expected on
Linux.

How to reproduce:
$ gcc test.cc  # or clang test.cc
$ ./a.out

Actual output:
0
1
2
3
...
*0
*1
*2
*3
...

Expected output:
0
1
2
3
...
(with rare inclusions of the asterix-prefixed lines).

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