From 99f3ab144dcaa97a2be37e562740dbff2de350c6 Mon Sep 17 00:00:00 2001
From: Nikias Bassen
Date: Mon, 29 May 2017 04:08:29 +0200
Subject: Integrate fuzzers into build system

---
 configure.ac | 73 +++++++++++++++++++++++++++++++++++++++++++++++++++++++++++-
 1 file changed, 72 insertions(+), 1 deletion(-)

(limited to 'configure.ac')

diff --git a/configure.ac b/configure.ac
index 1ad1341..43017bf 100644
--- a/configure.ac
+++ b/configure.ac
@@ -156,6 +156,76 @@ case "$GLOBAL_CFLAGS" in
         AC_DEFINE([HAVE_FVISIBILITY], [1], [Define if compiled with -fvisibility=hidden])
 esac
 
+AC_ARG_WITH([fuzzers],
+            [AS_HELP_STRING([--with-fuzzers],
+            [build fuzzers and libplist with sanitizers (default is no)])],
+            [build_fuzzers=true],
+            [build_fuzzers=false])
+if test "x$build_fuzzers" = "xtrue"; then
+    AS_COMPILER_FLAG([-fsanitize=address], [
+        SANITIZER_FLAGS+=" -fsanitize=address"
+        ASAN_AVAILABLE=yes
+    ], [])
+    if test "$ASAN_AVAILABLE" = "yes"; then
+        AS_COMPILER_FLAG([-fsanitize=address -fsanitize-address-use-after-scope], [
+            SANITIZER_FLAGS+=" -fsanitize-address-use-after-scope"
+        ], [])
+        SANITIZERS+="ASAN "
+    fi
+
+    AS_COMPILER_FLAG([-fsanitize=undefined], [
+        SANITIZER_FLAGS+=" -fsanitize=undefined"
+        UBSAN_AVAILABLE=yes
+    ], [])
+
+    if test "$UBSAN_AVAILABLE" = "yes"; then
+        SANITIZERS+="UBSAN "
+    fi
+
+    if test -z "$SANITIZER_FLAGS"; then
+        AC_MSG_ERROR([compiler doesn't support -fsanitize=address nor -fsanitize=undefined])
+    fi
+
+    COVERAGE_CHECKS="trace-pc-guard trace-cmp edge"
+    for COV_CHECK in $COVERAGE_CHECKS; do
+        AS_COMPILER_FLAG([-fsanitize-coverage=$COV_CHECK], [
+            if test -z "$SAN_COV_FLAGS"; then
+                SAN_COV_FLAGS="$COV_CHECK"
+            else
+                SAN_COV_FLAGS+=",$COV_CHECK"
+            fi
+        ], [])
+    done
+    if test -n "$SAN_COV_FLAGS"; then
+        SANITIZER_FLAGS+=" -fsanitize-coverage=$SAN_COV_FLAGS"
+    else
+        AC_MSG_WARN([No sanitizer coverage supported by compiler])
+    fi
+
+    CFLAGS="-O1"
+
+    AS_COMPILER_FLAG([-fno-omit-frame-pointer], [
+        CFLAGS+=" -fno-omit-frame-pointer"
+    ], [])
+
+    AS_COMPILER_FLAG([-gline-tables-only], [
+        CFLAGS+=" -gline-tables-only"
+    ],
+    [
+        CFLAGS+=" -g"
+    ])
+
+    CFLAGS+=" -DFUZZING_BUILD_MODE_UNSAFE_FOR_PRODUCTION"
+    CFLAGS+=" $SANITIZER_FLAGS"
+    CXXFLAGS="$CFLAGS -std=c++11"
+    EXTRA_CONF+="  Build fuzzers ...........: yes
+"
+    EXTRA_CONF+="  Enabled sanitizers ......: $SANITIZERS
+"
+    AS_COMPILER_FLAGS(TEST_CFLAGS, [$CFLAGS])
+fi
+AM_CONDITIONAL([BUILD_FUZZERS],[test "x$build_fuzzers" = "xtrue"])
+
 m4_ifdef([AM_SILENT_RULES],[AM_SILENT_RULES([yes])])
 
 AC_OUTPUT([
@@ -168,6 +238,7 @@ include/Makefile
 tools/Makefile
 cython/Makefile
 test/Makefile
+fuzz/Makefile
 doxygen.cfg
 ])
 
@@ -178,7 +249,7 @@ Configuration for $PACKAGE $VERSION:
   Install prefix ..........: $prefix
   Debug code ..............: $debug
   Python bindings .........: $cython_python_bindings
-
+$EXTRA_CONF
   Now type 'make' to build $PACKAGE $VERSION,
   and then 'make install' for installation.
 "
-- 
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