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Bug 1099025 - ftime() possibly broken on ppc
ftime() possibly broken on ppc
Status: CLOSED ERRATA
Product: Red Hat Enterprise Linux 6
Classification: Red Hat
Component: glibc (Show other bugs)
6.5
ppc Unspecified
low Severity unspecified
: rc
: ---
Assigned To: Carlos O'Donell
Arjun Shankar
:
Depends On: 1064945
Blocks: 1028285
  Show dependency treegraph
 
Reported: 2014-05-19 06:42 EDT by Siddhesh Poyarekar
Modified: 2016-11-24 07:11 EST (History)
8 users (show)

See Also:
Fixed In Version: glibc-2.12-1.148.el6
Doc Type: Bug Fix
Doc Text:
This update fixes a bug in the gettimeofday VDSO implementation that resulted in gettimeofday returning an incorrect non-changing value, resulting in the ftime function returning the same non-changing value.
Story Points: ---
Clone Of: 1064945
Environment:
Last Closed: 2014-10-14 00:43:44 EDT
Type: Bug
Regression: ---
Mount Type: ---
Documentation: ---
CRM:
Verified Versions:
Category: ---
oVirt Team: ---
RHEL 7.3 requirements from Atomic Host:
Cloudforms Team: ---


Attachments (Terms of Use)


External Trackers
Tracker ID Priority Status Summary Last Updated
Red Hat Product Errata RHSA-2014:1391 normal SHIPPED_LIVE Moderate: glibc security, bug fix, and enhancement update 2014-10-13 21:11:04 EDT

  None (edit)
Description Siddhesh Poyarekar 2014-05-19 06:42:57 EDT
+++ This bug was initially created as a clone of Bug #1064945 +++

Description of problem:
The configure script in the lrzsz package checks if the ftime() function works correctly and it seems this test hangs (infinite loop) on ppc in the current RHEL7 buildroot. It looks like the time field in the timeb structure doesn't change or the call now fails.

I've patched the lrzsz package to not try ftime(), but I thought this might be worth further investigation.

The last build that passed was with glibc-2.17-4.el7. 

Version-Release number of selected component (if applicable):
glibc-2.17-48.el7

How reproducible:
easily

Steps to Reproduce:
1. compile and run the c code below

Actual results:
hangs

Expected results:
runs for 10 seconds and returns 0.

Additional info:

The test code:

#include <sys/types.h>
#include <sys/timeb.h>
#include <stdio.h>
main ()
{
  struct timeb s, slast;
  int c = 0;
  ftime (&slast);
  while (c < 10)
    {
      ftime (&s);
      if (s.time < slast.time
      || (s.time == slast.time && s.millitm < slast.millitm)) {
      fprintf(stderr,"s: %ld, %ld, slast: %ld, %ld\n",
        s.time,s.millitm, slast.time,slast.millitm);
    exit (1);
        }
      if (s.time != slast.time)
    ++c;
      slast.time = s.time;
      slast.millitm = s.millitm;
    }
  exit (0);
}
Comment 1 Siddhesh Poyarekar 2014-05-19 06:47:49 EDT
This blocks bz #1028285 because the latter adds VDSO support for gettimeofday, which in turn introduces this bug.
Comment 18 errata-xmlrpc 2014-10-14 00:43:44 EDT
Since the problem described in this bug report should be
resolved in a recent advisory, it has been closed with a
resolution of ERRATA.

For information on the advisory, and where to find the updated
files, follow the link below.

If the solution does not work for you, open a new bug report.

http://rhn.redhat.com/errata/RHSA-2014-1391.html

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