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-rw-r--r--m4/sanitizer.m483
1 files changed, 83 insertions, 0 deletions
diff --git a/m4/sanitizer.m4 b/m4/sanitizer.m4
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+# Copyright (C) 2018 CZ.NIC, z.s.p.o. <knot-dns@labs.nic.cz>
+#
+# This program is free software: you can redistribute it and/or modify it
+# under the terms of the GNU General Public License version 3, as published
+# by the Free Software Foundation.
+#
+# This program is distributed in the hope that it will be useful, but
+# WITHOUT ANY WARRANTY; without even the implied warranties of
+# MERCHANTABILITY, SATISFACTORY QUALITY, or FITNESS FOR A PARTICULAR
+# PURPOSE. See the GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License along
+# with this program. If not, see <http://www.gnu.org/licenses/>.
+
+#
+# Processes --with-sanitizer, --with-fuzzer, and --with-oss-fuzz flags, checks
+# if the options are supported by the compiler, and sets the following
+# variables accordingly:
+#
+# - sanitizer_CFLAGS -fsanitize=...
+# - fuzzer_CLAGS -fsanitize=...
+# - fuzzer_LDLAGS -fsanitize=...
+#
+
+AC_DEFUN([AX_SANITIZER], [
+
+ # Configure options
+ AC_ARG_WITH([sanitizer],
+ [AS_HELP_STRING([--with-sanitizer], [Compile with sanitizer [default=no]])],
+ [],
+ [with_sanitizer=no]
+ )
+ AC_ARG_WITH([fuzzer],
+ [AS_HELP_STRING([--with-fuzzer], [Compile with libfuzzer [default=no]])],
+ [],
+ [with_fuzzer=no]
+ )
+ AC_ARG_WITH([oss-fuzz],
+ [AS_HELP_STRING([--with-oss-fuzz], [Link for oss-fuzz environment [default=no]])],
+ [],
+ [with_oss_fuzz=no]
+ )
+
+ # Using -fsanitize=fuzzer requires clang >= 6.0
+ AS_IF([test "$with_fuzzer" != "no"],[
+ # Get clang version if empty
+ AS_IF([test -z "$CC_CLANG_VERSION"],[AX_CC_CLANG])
+ AX_COMPARE_VERSION([$CC_CLANG_VERSION],ge,[6.0],[],[
+ AC_MSG_ERROR([clang >= 6.0 required for fuzzer])])])
+
+ # Default values
+ AS_IF([test "$with_sanitizer" = "yes"], [ with_sanitizer=address ])
+ AS_IF([test "$with_fuzzer" = "yes"], [ with_fuzzer=fuzzer ])
+
+ # Construct output variables
+ sanitizer_CFLAGS=
+ fuzzer_CFLAGS=
+ fuzzer_LDFLAGS=
+ AS_IF([test "$with_sanitizer" != "no"], [
+ sanitizer_CFLAGS="-fsanitize=${with_sanitizer}"
+ ])
+ AS_IF([test "$with_fuzzer" != "no"], [
+ fuzzer_CFLAGS="-fsanitize=${with_fuzzer}"
+ fuzzer_LDFLAGS="-fsanitize=${with_fuzzer}"
+ ])
+ AC_SUBST(fuzzer_CFLAGS)
+ AC_SUBST(fuzzer_LDFLAGS)
+
+ # Test compiler support
+ AS_IF([test -n "$sanitizer_CFLAGS" -o -n "$fuzzer_CFLAGS"], [
+ save_CFLAGS="$CFLAGS"
+ CFLAGS="$CFLAGS $sanitizer_CFLAGS $fuzzer_CFLAGS"
+ AC_MSG_CHECKING([whether compiler accepts '${sanitizer_CFLAGS} ${fuzzer_CFLAGS}'])
+ AC_COMPILE_IFELSE([AC_LANG_PROGRAM()], [
+ AC_MSG_RESULT([yes])
+ ], [
+ AC_MSG_RESULT([no])
+ AC_MSG_ERROR([Options are not supported.])
+ ])
+ CFLAGS="$save_CFLAGS"
+ ])
+
+]) # AX_SANITIZER