Workaround to get rust coverage for Suricata

projects/suricata/Dockerfile

@@ -32,3 +32,4 @@ RUN git clone --depth 1 https://github.com/OISF/libhtp.git libhtp
 RUN git clone --depth 1 https://github.com/OISF/suricata-verify suricata-verify
 WORKDIR $SRC
 COPY build.sh $SRC/
+COPY rustc.py $SRC/

projects/suricata/build.sh

@@ -52,7 +52,15 @@ mv libhtp suricata/
 cd suricata
 sh autogen.sh
 #run configure with right options
+if [ "$SANITIZER" = "coverage" ]
+then
+export RUSTFLAGS="$RUSTFLAGS -C debug-assertions=no"
+chmod +x $SRC/rustc.py
+export RUSTC="$SRC/rustc.py"
+./configure --disable-shared --enable-fuzztargets --enable-debug
+else
 ./src/tests/fuzz/oss-fuzz-configure.sh
+fi
 make -j$(nproc)
 
 cp src/fuzz_* $OUT/

projects/suricata/rustc.py

@@ -0,0 +1,28 @@
+#!/usr/bin/env python
+
+# Copyright 2021 Google LLC
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#      http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+import sys
+import subprocess
+
+#disable coverage for crate brotli_decompressor
+sys.argv[0] = "rustc"
+if "brotli_decompressor" in sys.argv:
+    try:
+        sys.argv.remove("-Zinstrument-coverage")
+    except:
+        pass
+    print(sys.argv)
+subprocess.call(sys.argv)