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This fixes part of the issue described in PR gcov-profile/54487 where there...

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This fixes part of the issue described in PR gcov-profile/54487 where
there were warnings about mismatches due to slight differences in the
merged histograms in different object files. This can happen due to
the truncating integer division in the merge routine, which could result
in slightly different histograms when summaries are merged in different
orders.

2012-09-07  Teresa Johnson  <tejohnson@google.com>

        PR gcov-profile/54487
	* libgcc/libgcov.c (gcov_exit): Avoid warning on histogram
        differences.

From-SVN: r191074
This commit is contained in:
Teresa Johnson 2012-09-07 13:49:47 +00:00 committed by Teresa Johnson
parent 48d3d75d39
commit c6c36e7310
2 changed files with 13 additions and 1 deletions
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6
libgcc/ChangeLog
View File

@ -1,3 +1,9 @@
2012-09-07 Teresa Johnson <tejohnson@google.com>
PR gcov-profile/54487
* libgcc/libgcov.c (gcov_exit): Avoid warning on histogram
differences.
2012-09-05 Georg-Johann Lay <avr@gjlay.de>
PR target/54461

8
libgcc/libgcov.c
View File

@ -707,7 +707,13 @@ gcov_exit (void)
memcpy (cs_all, cs_prg, sizeof (*cs_all));
else if (!all_prg.checksum
&& (!GCOV_LOCKED || cs_all->runs == cs_prg->runs)
&& memcmp (cs_all, cs_prg, sizeof (*cs_all)))
/* Don't compare the histograms, which may have slight
variations depending on the order they were updated
due to the truncating integer divides used in the
merge. */
&& memcmp (cs_all, cs_prg,
sizeof (*cs_all) - (sizeof (gcov_bucket_type)
* GCOV_HISTOGRAM_SIZE)))
{
fprintf (stderr, "profiling:%s:Invocation mismatch - some data files may have been removed%s\n",
gi_filename, GCOV_LOCKED