[Bug gcov-profile/80413] sanitizer detects undefined behaviour in gcov-io.c using -ftest-coverage

[marxin at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=80413

--- Comment #6 from Martin Liška <marxin at gcc dot gnu.org> ---
Author: marxin
Date: Mon May 29 09:12:02 2017
New Revision: 248565

URL: https://gcc.gnu.org/viewcvs?rev=248565&root=gcc&view=rev
Log:
Backport r246903

2017-05-29  Martin Liska  <mliska@suse.cz>

        Backport from mainline
        2017-04-13  Martin Liska  <mliska@suse.cz>

        PR gcov-profile/80413
        * gcov-io.c (gcov_write_string): Copy to buffer just when
        allocated size is greater than zero.

Modified:
    branches/gcc-5-branch/gcc/ChangeLog
    branches/gcc-5-branch/gcc/gcov-io.c