[libvirt] [PATCH] maint: add sanitizers to the build process

[Daniel P. Berrange]

On Tue, May 30, 2017 at 12:28:57PM -0300, claudioandre.br at gmail.com wrote:
> From: Claudio André <claudioandre.br at gmail.com>
> 
> Sanitizers are based on compile-time instrumentation. They are available in gcc and clang for a range of supported operation systems and platforms. More info at: https://github.com/google/sanitizers

Please line wrap your commit messages at 80 chars or less.


> diff --git a/m4/virt-compile-sanitizer.m4 b/m4/virt-compile-sanitizer.m4
> new file mode 100644
> index 0000000..a7cac31
> --- /dev/null
> +++ b/m4/virt-compile-sanitizer.m4
> @@ -0,0 +1,51 @@
> +dnl
> +dnl Check for support for Sanitizers
> +dnl Check for -fsanitize=address and -fsanitize=undefined support
> +dnl
> +dnl This library is free software; you can redistribute it and/or
> +dnl modify it under the terms of the GNU Lesser General Public
> +dnl License as published by the Free Software Foundation; either
> +dnl version 2.1 of the License, or (at your option) any later version.
> +dnl
> +dnl This library is distributed in the hope that it will be useful,
> +dnl but WITHOUT ANY WARRANTY; without even the implied warranty of
> +dnl MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
> +dnl Lesser General Public License for more details.
> +dnl
> +dnl You should have received a copy of the GNU Lesser General Public
> +dnl License along with this library.  If not, see
> +dnl <http://www.gnu.org/licenses/>.
> +dnl
> +
> +AC_DEFUN([LIBVIRT_COMPILE_SANITIZER],[
> +    LIBVIRT_ARG_ENABLE([ASAN], [Build with address sanitizer support], [no])
> +    LIBVIRT_ARG_ENABLE([UBSAN], [Build with undefined behavior sanitizer support], [no])
> +
> +    SAN_CFLAGS=
> +    SAN_LDFLAGS=
> +
> +    AS_IF([test "x$enable_asan" = "xyes"], [
> +        gl_COMPILER_OPTION_IF([-fsanitize=address -fno-omit-frame-pointer], [
> +            SAN_CFLAGS="-fsanitize=address -fno-omit-frame-pointer"
> +            SAN_LDFLAGS="-fsanitize=address"
> +        ])
> +
> +        AC_SUBST([SAN_CFLAGS])
> +        AC_SUBST([SAN_LDFLAGS])
> +    ])
> +
> +    AS_IF([test "x$enable_ubsan" = "xyes"], [
> +        gl_COMPILER_OPTION_IF([-fsanitize=undefined -fno-omit-frame-pointer], [
> +            SAN_CFLAGS="$SAN_CFLAGS -fsanitize=undefined -fno-omit-frame-pointer"
> +            SAN_LDFLAGS="$SAN_LDFLAGS -fsanitize=undefined"
> +        ])
> +
> +        AC_SUBST([SAN_CFLAGS])
> +        AC_SUBST([SAN_LDFLAGS])
> +    ])
> +])
> +
> +AC_DEFUN([LIBVIRT_RESULT_SANITIZER], [
> +  AC_MSG_NOTICE([              ASan: $enable_asan])
> +  AC_MSG_NOTICE([             UBSan: $enable_ubsan])
> +])

IMHO this could just be added to m4/virt-compile-warnings.m4, rather than
needing to define new CFLAGS/LDFLAGFS variables.

Regards,
Daniel
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