[Bug preprocessor/79214] -Wno-system-header defeats strncat buffer overflow warnings

2017-01-24 Thread msebor at gcc dot gnu.org 
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=79214

Martin Sebor  changed:

   What|Removed |Added

   Keywords||diagnostic
   See Also||https://gcc.gnu.org/bugzill
   ||a/show_bug.cgi?id=16358,
   ||https://gcc.gnu.org/bugzill
   ||a/show_bug.cgi?id=78000

--- Comment #1 from Martin Sebor  ---
See also bug 16358 and bug 78000 for a discussion of the underlying problem.

[Bug preprocessor/79214] -Wno-system-header defeats strncat buffer overflow warnings

2017-01-24 Thread msebor at gcc dot gnu.org 
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=79214

Martin Sebor  changed:

   What|Removed |Added

   See Also||https://gcc.gnu.org/bugzill
   ||a/show_bug.cgi?id=78989,
   ||https://gcc.gnu.org/bugzill
   ||a/show_bug.cgi?id=71613,
   ||https://gcc.gnu.org/bugzill
   ||a/show_bug.cgi?id=43167

--- Comment #2 from Martin Sebor  ---
A few other problem reports caused by -Wno-system-header: bug 78989, bug 71613,
and bug 43167.

[Bug preprocessor/79214] -Wno-system-header defeats strncat buffer overflow warnings

2017-01-25 Thread msebor at gcc dot gnu.org 
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=79214

Martin Sebor  changed:

   What|Removed |Added

 Status|UNCONFIRMED |ASSIGNED
   Last reconfirmed||2017-01-25
   Assignee|unassigned at gcc dot gnu.org  |msebor at gcc dot 
gnu.org
 Ever confirmed|0   |1

--- Comment #3 from Martin Sebor  ---
Testing a patch.

[Bug preprocessor/79214] -Wno-system-header defeats strncat buffer overflow warnings

2017-01-25 Thread msebor at gcc dot gnu.org 
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=79214

Martin Sebor  changed:

   What|Removed |Added

   Keywords||patch

--- Comment #4 from Martin Sebor  ---
Patch posted for review:
https://gcc.gnu.org/ml/gcc-patches/2017-01/msg01994.html

[Bug preprocessor/79214] -Wno-system-header defeats strncat buffer overflow warnings

2017-05-04 Thread msebor at gcc dot gnu.org 
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=79214

--- Comment #5 from Martin Sebor  ---
Author: msebor
Date: Thu May  4 20:54:43 2017
New Revision: 247618

URL: https://gcc.gnu.org/viewcvs?rev=247618&root=gcc&view=rev
Log:
PR preprocessor/79214 -  -Wno-system-header defeats strncat buffer overflow
warnings
PR middle-end/79222 - missing -Wstringop-overflow= on a stpcpy overflow
PR middle-end/79223 - missing -Wstringop-overflow on a memmove overflow

gcc/ChangeLog:

PR preprocessor/79214
PR middle-end/79222
PR middle-end/79223
* builtins.c (check_sizes): Add inlinining context and issue
warnings even when -Wno-system-headers is set.
(check_strncat_sizes): Same.
(expand_builtin_strncat): Same.
(expand_builtin_memmove): New function.
(expand_builtin_stpncpy): Same.
(expand_builtin): Handle memmove and stpncpy.

gcc/testsuite/ChangeLog:

PR preprocessor/79214
PR middle-end/79222
PR middle-end/79223
* gcc.dg/pr79214.c: New test.
* gcc.dg/pr79214.h: New test header.
* gcc.dg/pr79222.c: New test.
* gcc.dg/pr79223.c: New test.
* gcc.dg/pr78138.c: Adjust.
* gfortran.dg/unconstrained_commons.f: Same.


Added:
trunk/gcc/testsuite/gcc.dg/pr79214.c
trunk/gcc/testsuite/gcc.dg/pr79214.h
trunk/gcc/testsuite/gcc.dg/pr79222.c
trunk/gcc/testsuite/gcc.dg/pr79223.c
Modified:
trunk/gcc/ChangeLog
trunk/gcc/builtins.c
trunk/gcc/testsuite/ChangeLog
trunk/gcc/testsuite/gcc.dg/pr78138.c
trunk/gcc/testsuite/gfortran.dg/unconstrained_commons.f

[Bug preprocessor/79214] -Wno-system-header defeats strncat buffer overflow warnings

2017-05-04 Thread msebor at gcc dot gnu.org 
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=79214

Martin Sebor  changed:

   What|Removed |Added

 Status|ASSIGNED|RESOLVED
  Known to work||8.0
 Resolution|--- |FIXED
  Known to fail||7.0

--- Comment #6 from Martin Sebor  ---
Fix committed in r247618.